ALBERT

Notes: The changes in porosity and elastic moduli of YSZ-containing nickel-based anode materials for solid oxide fuel cells were studied as a function of the fraction of reduced NiO. Anode samples were reduced in a gas mixture of 4% hydrogen and 96% argon for different periods of time at 800°C and their Young's and shear moduli were determined afterward at room temperature using resonant ultrasound spectroscopy and impulse excitation. It was found that the magnitude of Young's and shear moduli decreased significantly with increasing fraction of reduced NiO and that the magnitude of the elastic moduli of a fully reduced Ni–YSZ anode was ∼45% lower than that of unreduced NiO–YSZ. Because the elastic moduli of NiO are close to those of Ni, the observed decrease in the magnitude of the elastic moduli was found to be caused mainly by the significant increase in the porosity of the sample as a result of NiO reduction. Expressions are presented for the amount of porosity and the magnitude of the elastic moduli as a function of the fraction of reduced NiO.

Notes: Two- and three-dimensional SiCr/SiC composites have been prepared starting from Tyranno SA(tm) fiber preforms. Preform densification has been performed by a modified preceramic polymer impregnation and pyrolysis (PIP) process consisting of filling the preform large interbundle voids with SiC powder before the PIP process. This step was accomplished by low-pressure infiltration of a SiC powder dilute slurry through the preform thickness. Specimens were further processed with polymer impregnation and pyrolysis to determine the effects on structural, thermal, and mechanical properties of the obtained composites. High-temperature pyrolysis treatment, which promoted polymer derived SiC matrix crystallization, markedly increased thermal diffusivity.

Notes: Carbon is commonly added to sulfate-fined silicate-glass batches to enhance the fining process. Reactions between carbon and Na2SO4 modify the SOx emissions from Na2SO4 decomposition. Fourier-transform infrared (FTIR) spectrometry is used to analyze the emission of air pollutants from the isothermal decomposition of Na2SO4 + C undertaken using thermogravimetric analysis (TGA). The FTIR spectrometer is calibrated using standard gas mixtures containing CO, CO2, SO2, NO, and NO2. The collected spectra are quantified using the classical least-squares (CLS) approximation. The TGA-FTIR system provides SOx, and COx, concentrations versus time data from the isothermal decomposition of Na2SO4, in the presence of a carbon black. Mass spectrometry (MS) complements FTIR by being able to detect SO(g).

Notes: Different ratios of the precursor phases of SrFeO3–x (SFO) and SrMoO4 (SMO) were used to prepare Sr2FeMoO6 (SFMO) by a solid-state reaction. X-ray diffraction was used to identify the phases. A residual SMO was observed to exist in the sample with an SFO/SMO ratio of 0.9:1. The sample with a residual SMO phase had higher resistivity, lower magnetization, but higher low-field magnetoresistance (LFMR). High-resolution transmission electron microscopy was used to identify the compositions and phases. Nanometer-sized amorphous-like clusters of SMO phase were located inside the grains rather than at grain boundaries; however, some boundaries were rich in the strontium ion. The possible mechanisms for the conduction and the increase of LFMR of SFMO are discussed.

Notes: Submicro- and nano-sized liquid-phase-sintered SiC ceramics were mechanically tested by nanoindentation in the peak load range 5–400 mN. The submicro-sized sample showed a marked indentation size effect which the nano-sized samples did not exhibit. The relevance of indentation depth with respect to the microstructural scale has been outlined. In the investigated grain-size range, the hardness dependence on the grain size could be described by a load-dependent inverse Hall–Petch relation. Young's modulus was less microstructure- and load-dependent. Because of the very fine microstructure, the nano-sized SiC materials gave lower elastic values than the submicro-sized SiC ceramic.

Notes: Samples of composition Ba1−xLaxTi1−x/4O3, x= 0, 0.003, 0.03, and 0.10, were prepared by an alkoxide sol–gel route with final firing of ceramics at 1100°C, 2 h in air. All samples showed bulk insulating behavior with no evidence of semiconductivity caused by either direct donor doping or oxygen loss.

Notes: We have studied the rheological property evolution and hydration behavior of white and ordinary portland cement (type I) pastes and concentrated cement–polyelectrolyte suspensions. Cement composition had a marked effect on the elastic property evolution (G′(t)) and hydration behavior of these suspensions in the presence of poly(acrylic acid)/poly(ethylene oxide) copolymer (PAA/PEO), even though their affinity to adsorb such species was nearly identical. Both white and ordinary portland cement pastes exhibited G′0 values of ∼104 Pa and fully reversible G′(t) behavior until the onset of the acceleratory period (t= 2 h), where the pastes stiffened irreversibly. In contrast, cement–PAA/PEO suspensions exhibited G′0 values of ∼1 Pa and G′(t) behavior comprised of both reversible and irreversible features. Interestingly, ordinary portland cement–PAA/PEO suspensions experienced a gel-to-fluid transition on high shear mixing at short hydration times (〈1 h), and the particle network did not rebuild until ∼24 h of hydration. In sharp contrast, white portland cement–PAA/PEO suspensions remained weakly gelled throughout the initial stage of hydration even after high shear mixing. At longer hydration times (〉1 h), both cement–PAA/PEO suspensions exhibited G′i(t) ∼ exp(t/τc) with τc values of 5.6 and 1.3 h for ordinary and white portland cement, respectively. Our observations suggest that hydration phenomena impact interparticle forces during early stage hydration and, ultimately, lead to initial setting through the formation of solid bridges at the contact points between particles within the gelled network.

Notes: A new ceramic freeze-casting technique capable of manufacturing near room temperature with a sublimable vehicle was accomplished. Fluid-concentrated slurries of Al2O3 powder in molten camphene (C10H16) were prepared at 55°C. These slurries were quickly solidified (frozen) at room temperature to yield rigid solid green bodies, followed by frozen camphene removal by sublimation (freeze-drying) with negligible shrinkage. Sintering without any special binder burnout process yielded sintered bodies with over 98% theoretical density. The proposed advantages include (1) elimination of extremely cold temperatures, (2) elimination of troublesome binder burnout process, and (3) fast manufacturing cycle due to quick solidification.

Notes: Dense composites in the Ti-B-N system have been produced by reactive hot pressing of titanium and BN powders. The effect of the addition of a small amount of nickel (1–3 wt%) on the reaction kinetics and densification of TiN–TiB2 (40 vol%) composite has been studied. Composites of ∼99% of theoretical density have been produced at 1600°C under 40 MPa for 30 min with 1% nickel. The hardness and fracture toughness of these composites are 24.5 ± 0.97 GPa and 6.53 ± 0.27 MPa·m1/2, respectively. The microstructural studies on samples produced at lower temperatures indicate the formation of a transient liquid phase, which enhances the kinetics of the reaction and densification of the composite.

Notes: This paper presents new findings on ultrasonic spray pyrolysis of zirconium hydroxyl acetate precursor drops whose sizes were precisely measured using laser light diffraction technique. Precursor concentration plays a predominant role in determination of product particle size. At 0.01 wt% precursor concentration, conventional spray pyrolysis at 750°C using precursor drops 5–8 μm in diameter, generated by an ultrasonic nebulizer at 2.66 MHz, yielded uniform spherical yttria-stabilized zirconia (YSZ) particles 73 nm in diameter measured by scanning electron microscopy. The YSZ particle diameters were much smaller than those predicted by the one-particle-per-drop mechanism. Under similar reaction conditions, the high-throughput ultrasound-modulated two-fluid (UMTF) spray pyrolysis of larger precursor drops (28-μm peak diameter) also yielded spherical dense particles; they were significantly smaller in size than those produced by the low-throughput conventional ultrasonic spray pyrolysis of smaller drops (6.8-μm peak diameter).

Notes: Thermoelectric elements consisting of the layered polycrystalline materials of Al-doped ZnO and NaCo2O4 were prepared using the pulse electric-current sintering (PECS) method at 900°C for 3 min. Direct contact between the polycrystalline Al-doped ZnO and the NaCo2O4 was obtained in a single-step process for the stacked powders. The electrical conductivities of the polycrystalline materials prepared by PECS were higher than those of materials prepared by conventional sintering, despite their porous structure. The thermoelectric voltage of the 1-mol%-Al-doped ZnO and NaCo2O4 polycrystalline element (measuring ∼6 mm × 3 mm × 15 mm) was 83 mV at dT= 500 K, when the junction of the elements was at 800°C.

Notes: Pb(Zr,Ti)O3–Pb(Mn1/3 Nb2/3)O3 (PZT–PMnN) system has been studied for high-power piezoelectric applications. This study investigates this system to find out the composition with high-power density piezoelectric characteristics and low tem-perature coefficient of resonance frequency (TCF). It was found that the composition 0.9PZT–0.1PMnN (Zr/Ti = 0.51/0.49) modified with 6 mol% Sr exhibits a TCF of −8 ppm/°C (−20 to +80°C). Further, the dielectric and piezoelectric properties of this composition are as follows: kp= 0.53; Qm= 800; d33= 274; ε33/ε0= 1290 and tan δ=1.1%, which shows the suitability of this composition for ultrasonic devices used under fluctuating thermal environment.

Notes: Beam bending is an excellent method for measuring low permeabilities (≤10−18 m2) in homogeneous materials, because it is fast, requires no high pressure, and provides a concurrent measurement of the modulus of the material. The method was previously analyzed and substantiated for cylindrical or square beams. Recently, the analysis was extended to include isotropic and transversely isotropic rectangular beams. In this paper, the analysis is applied to measurements performed on cement paste, and it is shown that the solution for isotropic rectangular beams accounts for changes in the hydrodynamic behavior caused by changing the aspect ratio of the sample. The permeability and elastic modulus results are verified through comparison to previous measurements on cylindrical beams.

Notes: The deformation behavior of boron- and carbon-doped β-silicon carbide (B,C-SiC) with an average grain size of 260 ± 18 nm containing 1 wt% boron was investigated by compression testing at elevated temperatures. Extensive grain growth during deformation was observed. The stress–strain curves were compensated for grain growth by assuming power-law type of dependence on grain size and strain rate. The stress exponent n was ∼1.3 and the grain size exponent p was ∼2.7 at temperatures ranging from 1593° to 1758°C. The apparent activation energy of deformation Qd was ∼760 kJ/mol, which was lower than the activation energy for lattice diffusion of silicon and carbon in SiC and higher than that for grain-boundary diffusion of carbon in SiC. These results suggest that the deformation mechanism of the fine-grained B,C-SiC is grain-boundary sliding accommodated by the grain-boundary diffusion.

Notes: Chromium-containing stainless steel (SS) is a prospective material for use as an interconnect in solid oxide fuel cells (SOFCs). However, during operations at high temperatures, the growth of oxide scales causes the performance of the interconnect and SOFC as a whole to deteriorate. The coating of SS 446 with a conducting perovskite is a potential method of slowing the growth of oxide scale and, therefore, improving overall SOFC performance. In the present research, the structural characterization of a pure LaCrO3 thin film on the SS 446 substrates has been performed as a model material that can be used as a barrier coating for the metallic interconnect. The deposition of an amorphous La-Cr-O thin film on SS 446 was performed using radio-frequency (rf) magnetron sputtering. The deposited amorphous film was annealed in air to form the desired perovskite phase. The film underwent an amorphous to LaCrO4 phase transition during annealing at 500°C with further transformation to LaCrO3 orthorhombic phase during annealing at 700°C. A self-organized dendritic structure was reported as a result of the perovskite-phase formation. Although formation of various oxides, such as Fe2O3 and Fe3O4, was observed during the annealing of uncoated SS 446 in air, the coating of SS 446 surface with LaCrO3 film prevented formation of various oxide phases at the interconnect surface. The structural characterization of the films and SS 446 surfaces was accomplished using scanning electron microscopy with energy-dispersive X-ray analysis, X-ray diffractometry, micro-Raman spectroscopy, and nanoindentation.

Notes: The density, surface tension, and viscosity of the melts from the PbO-B2O3-SiO2 system have been measured at temperatures in the range 1073–1473 K. The effect of composition on these properties was also investigated. The density of the melt was found to increase linearly with increasing PbO content. Molar volume was derived from the density data, and its deviation from the additivity of partial molar volumes was calculated. These deviations in molar volume from those obtained from additivity rules have been used along with the ratio of various coordination numbers of boron (as reported by Bray) to discuss the structure of the melts. The surface tension was found to decrease with decreasing SiO2/B2O3 ratio, and to increase in the range of the PbO content between 30 and 60 mol%, showing a maximum at ∼60 mol% PbO, and then decreased with further additions. This result suggested that the surface tension would be affected primarily by the B2O3 content in the range of the PbO content between 30–60 mol%, and mainly by the PbO content in the range of the PbO content 〉60 mol%, respectively. The viscosity of the melt was found to decrease linearly with increasing PbO content. The results obtained indicate that the increase in viscosity with B2O3 was half that of SiO2 (on a molar basis), and an empirical equation has been proposed for the viscosity as a function of mole fraction.

Notes: Core/shell structures have been prepared via a mechanofusion system by employing several kinds of spherical polymers as a core material and Al2O3 powder or a mixture of Al2O3 and SiO2 powders as a shell material. The effect of the kind of core polymers on the quality of the resulting hollow alumina microspheres has been discussed on the basis of the thermal decomposition behavior of spherical polymers used as a core material. A large fraction of hollow alumina microspheres reflecting the shape and the particle size distribution of the core polymer could be fabricated after sintering at 1600°3C for 3 h, when highly cross-linked poly(methyl methacrylate) (PMMA) microspheres with a gel fraction of 99.03% were used as a core polymer, and abrupt firing at temperatures higher than 500°3C was adopted to remove the PMMA microspheres. The addition of 5 mass% SiO2 to the Al2O3 shell layer was found to be useful for maintaining the spherical shell structure during the firing process and for fabricating a large fraction of hollow alumina microspheres after the sintering.

Notes: Well-defined and stoichiometric spherical particles of BaTiO3 of narrow size distribution were produced at 82° and 92°3C by precipitation from chloride solutions in a strong alkaline environment. The size of the particles can be tailored in the range from ≅103 to 70–80 nm by increasing the barium concentration from ≅0.07 to 0.7 mol/L. The particles are composed of tight aggregates resulting from the assembly of several nanocrystals. The size of the nanocrystals decreases from 200–300 to 30–40 nm by increasing reactant concentration. At low barium concentration (≤0.07 mol/L at 82°3C, ≤0.06 mol/L at 92°3C), formation of BaTiO3 is strongly slowed down and nonstoichiometric, Ti-rich powders are produced. Under these conditions, the particles have the tendency to develop a dendritic-like morphology.

Notes: Crystals of δ-Y2Si2O7 (space group P121/c1) were examined using high-temperature powder X-ray diffractometry to determine their unit-cell dimensions from 296 to 1473 K. The lattice deformation induced by thermal expansion was investigated using matrix algebra analysis to determine the directions and magnitudes of the principal distortions (Λi, i= 1,2, and 3). The directions of Λ1 and Λ3 were defined by the acute angle Λ1c, which linearly decreased from 5(2)° to —5.5(3)° with increased temperature from 504 to 1473 K. The Λ2-axis invariably coincided with the crystallographic b-axis. The magnitudes of Λ1 and Λ2 steadily increased to, respectively, 1.0061(1) and 1.0068(1) during heating to 1473 K, while Λ3 remained almost constant for the entire temperature range. The mean principal distortion, Λm (= (Λ1+Λ2+Λ3)/3), steadily increased to 1.0044(1) with increased temperature to 1473 K. The coefficient of mean linear thermal expansion (α) was derived from the mean principal strain (Λm - 1) as α= (Λm - 1)/ΔT. The temperature dependence was determined to be α= 2.03 times 103+ 1.36(T - 296) (10-9 K-1). Provided that the rule-of-mixtures holds for the Y2Si2O7/Y2SiO5 composites as protective coating on SiC substrates, the volume fractions of 0.72-0.77 (70–75 mass%) would be necessary for the Y2Si2O7 component to match the α-values of both materials.

Notes: Microcellular silicon oxycarbide open cell ceramic foams were fabricated from a silicone resin. Microcellular foams, with a cell size ranging from ∼1–80 μm, were fabricated using poly(methyl methacrylate) microbeads as sacrificial templates. The compression strength of the foams decreased with increasing cell size.

Notes: Electroconductive zirconia-toughened mullite (TiN/ZTM) intragranular nanocomposite was fabricated by hot-pressing a powder mixture of nano-sized TiN, ZrO2(2Y), and mullite gel. The material showed a good sinterability and could be highly densified at a low temperature of 1300°3C. Sintering temperature strongly influenced the microstructure and electrical resistivity of the material. The electrical resistivity increased monotonously from 20 Ω-cm to 1.5 times 106°3Cm, as the sintering temperature was increased from 1300° to 1500°3C. TEM results indicated that such a phenomenon could be ascribed to the changes in the microstructure of the material, which led to a decrease in the connectivity of the TiN network in the sample as the sintering temperature was increased.

Notes: Effects of fluids on material removal rate, chipping damage, and surface roughness in the simulated clinical-dental machining of a dental-type glass ceramic were investigated. Significant differences in removal rate were obtained among the fluids investigated, but only a 4 wt% boric acid solution gave a higher removal rate than conventionally used water. Chipping damage was substantially lower for the boric acid and an oil-emulsion coolant compared with other fluids tested. Surface roughness was independent of the fluids used. The results indicate that improvement can be achieved in both material removal rate and machining damage by the appropriate selection of coolant chemistry.

Notes: This paper reviews the structures and properties of 10 binary, ternary, and quaternary crystals within the equilibrium phase diagram of the SiO2–Y2O3–Si3N4 system. They are binary compounds SiO2, Y2O3, Si3N4; ternary compounds Si2N2O, Y2Si2O7, and YSi2O5; and quaternary crystals Y2Si3N4O3 (M-melilite), Y4Si2O7N2, (N-YAM), YSiO2N (wallastonite), and Y10(SiO4)6N2 (N-apatite, N-APT). Although the binary compounds are well-known and extensively studied, the ternary and the quaternary crystals are not. Most of the ternary and the quaternary crystals simply have been referenced as secondary phases in the processing of nitrogen ceramics. Their crystal structures are complex and not precisely determined. In the quaternary crystals, there exists O/N disorder in that the exact atomic positions of the anions cannot be uniquely determined. It is envisioned that a variety of cation–anion bonding configurations exist in these complex crystals. The electronic structure and bonding in these crystals are, therefore, of great interest and are indispensable for a fundamental understanding of structural ceramics. We have used ab initio methods to study the structure and bonding properties of these 10 crystals. For crystals with unknown or incomplete structural information, we use an accurate total energy relaxation scheme to obtain the most likely atomic positions. Based on the theoretically modeled structures, the electronic structure and bonding in these crystals are investigated and related to various local cation–anion bonding configurations. These results are presented in the form of atom-resolved partial density of states, Mulliken effective charges, and bond order values. It is shown that Y–O and Y–N bonding are not negligible and should be a part of the discussion of the overall bonding schemes in these crystals. Spectroscopic properties in the form of complex, frequency-dependent dielectric functions, X-ray absorption near-edge structure (XANES), and the electron energy-loss near-edge structure (ELNES) spectra in these crystals also are calculated and compared. These results are discussed in the context of specific bonding configurations between cations (silicon and yttrium) and anions (oxygen and nitrogen) and their implications on intergranular thin films in polycrystalline Si3N4 containing rare-earth elements.

Notes: Simultaneous synthesis and sintering of hexagonal α-Ti1−x-Alx(N) (0 ≤x≤ 0.08) solid solutions, which contain a small amount of nitrogen, have been performed by a self-propagating high-temperature combustion method under a nitrogen pressure of 4 MPa. Dense materials (∼99% of theoretical) prepared directly from a mixture of elemental (Ti and Al) powders reveal homogeneous microstructure composed of fine grains (12–16 μm). α-Ti1−xAlx(N) (x= 0.02; Ti0.98Al0.02N0.26) exhibits a three-point bending strength σb of 390 MPa, a Vickers hardness Hv of 9.24 GPa, and a fracture toughness KIC of 4.89 MPa·m1/2; their mechanical properties are much improved by doping Al into α-Ti(N), in comparison with those (σb= 245 MPa, Hv= 9.02 GPa, and KIC= 3.77 MPa·m1/2) of α-Ti(N) fabricated under the same conditions.

Notes: Electrophoretic deposition has been used to synthesize nickel–alumina, functionally graded materials from NiO and alumina suspensions in ethanol. Suspension stability and the kinetics of deposition were studied to determine optimum conditions. Deposition starts with an alumina suspension into which a stream of NiO suspension is injected at various flow rates to obtain the desired profiles. The latter were controlled by varying the deposition current density and component flow rate. The green bodies obtained were sintered in Ar/H2 atmosphere to reduce the NiO to nickel. Various gradation profiles were obtained illustrating the facility of EPD to synthesize continuously graded materials. NiO was used as the precursor for nickel to alleviate settling and rough columnar deposit problems.

Notes: Semiconductor nanowires and nanotubes exhibit novel electronic and optical properties owing to their unique structural one-dimensionality and possible quantum confinement effects in two dimensions. With a broad selection of compositions and band structures, these one-dimensional semiconductor nanostructures are considered to be the critical components in a wide range of potential nanoscale device applications. To fully exploit these one-dimensional nanostructures, current research has focused on rational synthetic control of one-dimensional nanoscale building blocks, novel properties characterization and device fabrication based on nanowire building blocks, and integration of nanowire elements into complex functional architectures. Significant progress has been made in a few short years. This review highlights the recent advances in the field, using work from this laboratory for illustration. The understanding of general nanocrystal growth mechanisms serves as the foundation for the rational synthesis of semiconductor heterostructures in one dimension. Availability of these high-quality semiconductor nanostructures allows systematic structural-property correlation investigations, particularly of a size- and dimensionality-controlled nature. Novel properties including nanowire microcavity lasing, phonon transport, interfacial stability and chemical sensing are surveyed.

Notes: Highly strained semiconductors grow epitaxially on mismatched substrates in the Stranski-Krastanow growth mode, wherein islands are formed after a few monolayers of layer-by-layer growth. Elastic relaxation on the facet edges, renormalization of the surface energy of the facets, and interaction between neighboring islands via the substrate are the driving forces for self-organized growth. The dimensions of the defect-free islands are of the order lambaB, the de Broglie wavelength, and provide three-dimensional quantum confinement of carriers. Self-organized In(Ga)As/GaAs quantum dots, or quantum boxes, are grown by molecular beam expitaxy (MBE) or metal-organic vapor phase epitaxy (MOVPE) on GaAs, InP, and other substrates and are being incorporated in microelectronic and opto-electronic devices. The use of strain to produce self-organized quantum dots has now become a well-accepted approach and is widely used in III-V semiconductors and other material systems. Much progress has been made in the area of growth, where focus has been on size control, and on optical characterization, where the goal has been the application to lasers and detectors. The unique carrier dynamics in the dots, characterized by femtosecond pump-probe spectroscopy, has led to novel device applications. This article reviews the growth and electronic properties of InGaAs quantum dots and the characteristics of interband and intersublevel lasers and detectors and modulation devices.

Notes: Carbon nanotubes functionalized with biological molecules (such as protein peptides and nucleic acids) show great potential for application in bioengineering and nanotechnology. Fundamental understanding, description, and regulation of such bio-nano-systems will ultimately lead to a new generation of integrated systems that combine unique properties of the carbon nanotube (CNT) with biological recognition capabilities. In this review, we describe recent advances in understanding the interactions between deoxyribonucleic acids (DNA) and CNT, as well as relevant simulation techniques. We also review progress in simulating DNA noncovalent interactions with CNTs in an aqueous environment. Molecular dynamics simulations indicate that DNA molecules may be encapsulated inside or wrap around CNT owing to van der Waals attraction between DNA and CNT. We focus on the dynamics and energetics of DNA encapsulation inside nanotubes and discuss the mechanism of encapsulation and the effects of nanotube size, nanotube end-group, DNA base sequence, solvent temperature and pressure on the encapsulation process. Finally, we discuss the likely impact of DNA encapsulation on bioengineering and nanotechnology, as well as other potential applications.

Notes: Modeling and simulation are becoming increasingly accepted components of materials research. In this review we discuss application of modeling and simulation in the developing field of biomaterials. To restrict the discussion somewhat, we focus primarily on the structure and properties of biomaterials and do not discuss biochemical or biomedical applications. We start with a discussion of how atomistic-level simulation can be used to study molecules and collections of molecules. We then focus on mesoscale simulations of structure and properties, followed by a brief review of continuum-scale approaches. We end with some thoughts on the future of modeling and simulation in biomaterials applications.

Notes: The unusual structure and properties of carbon nanotubes are presented, with particular reference to single-wall nanotubes (SWNTs) and nanotube properties that differ from those of their bulk counterparts. The atomic structure; electronic structure; and vibrational, optical, mechanical, and thermal properties are discussed, with reference made to nanotube junctions, nanotube filling, and double-wall nanotubes (DWNTs). Special attention is given to resonance Raman spectroscopy at the single nanotube level. The status of current research in this field is assessed and opportunities for future research are identified.

Notes: Over the past two decades, advances in biophysical instrumentation have enabled the study of molecular motors at the single molecule level. These studies have inspired the creation of biological/inorganic systems powered by such motors in an attempt to exploit their unique sizes, speeds, functions, and energy utilization capabilities. We give a brief overview of the state-of-the-art of biological and synthetic molecular motors and discuss some initial efforts to exploit their function in engineered structures. We also briefly discuss the construction of devices powered by organized and coordinated arrays of millions of motors in which the growth of cardiac muscle tissue over a microfabricated silicon "skeleton" is directed and controlled.

Notes: This review focuses on the preparation of capped nanoparticles of inorganic materials, classified by composition. The materials described include elemental metals and metalloids (semiconductors), chalcogenide II-VI and IV-VI semiconductors, III-V semiconductors, and oxides (both of simple- and multitransition metal). Although particular emphasis is placed on methods that yield large volumes of nanoparticles, recent novel methods that may not necessarily be scalable are also reviewed. The review makes apparent the richness of chemistry that has become routine to practitioners in the field; diverse inorganic systems with distinct chemistry require distinct methods of preparation.

Notes: Molecular biomimetics can be defined as mimicking function, synthesis, or structure of materials and systems at the molecular scale using biological pathways. Here, inorganic-binding polypeptides are used as molecular building blocks to control assembly and formation of functional inorganic and hybrid materials and systems for nano- and nanobiotechnology applications. These polypeptides are selected via phage or cell surface display technologies and modified by molecular biology to tailor their binding and multifunctionality properties. The potential of this approach in creating new materials systems with useful physical and biological properties is enormous. This mostly stems from molecular recognition and self-assembly characteristics of the polypeptides plus the added advantage of genetic manipulation of their composition and structure. In this review, we highlight the basic premises of molecular biomimetics, describe the approaches in selecting and engineering inorganic-binding polypeptides, and present examples of their utility as molecular linkers in current and future applications.

Notes: Nanostructures are fabricated using either conventional or unconventional tools-that is, by techniques that are highly developed and widely used or by techniques that are relatively new and still being developed. This chapter reviews techniques of unconventional nanofabrication, and focuses on experimentally simple and inexpensive approaches to pattern features with dimensions 〈100 nm. The techniques discussed include soft lithography, scanning probe lithography, and edge lithography. The chapter includes recent advances in fabricating nanostructures using each set of techniques, together with demonstrated advantages, limitations, and applications for each.

Notes: This paper reviews the current state of the art in accidental explosion modeling using methods based on computational fluid dynamics (CFD) in the petrochemical process industries. We discuss the problem in terms of its industrial importance and its technical difficulty, which stems mainly from the large range of length and timescales that must be represented. Explicit representation of all scales is not feasible due to limitations of computational cost, and modeling of unresolved physical features is required. We also discuss geometry modeling using the porosity/distributed resistance (PDR) method and review relevant combustion modeling. We describe an advanced CFD approach using unstructured adaptive gridding and discuss its usefulness in the context of results obtained for both two dimensional and three dimensional simulations of gas explosion phenomena in complex geometries.

Notes: Early concepts in shock wave drag reduction enabled modern aeronautical systems, and continuing research progress in this arena is crucial for significant improvements in long haul transports and various military platforms and weapons. The research area is rich in concepts/approaches, but many of these have not progressed into the realm of application. This is due in part to a lack of knowledge on the part of the fluids research community concerning the multidisciplinary "real-world" design space/metrics and a consequent lack of the requisite breadth and depth of research information required to evaluate/apply the concept. The article reviews the extant wave drag reduction approaches that are (a) well understood/applied, (b) under active study/indicate considerable promise, and (c) those in the nascent stage only.

Notes: Almost all vessels carrying fluids within the body are flexible, and interactions between an internal flow and wall deformation often underlie a vessel's biological function or dysfunction. Such interactions can involve a rich range of fluid-mechanical phenomena, including nonlinear pressure-drop/flow-rate relations, self-excited oscillations of single-phase flow at high Reynolds number and capillary-elastic instabilities of two-phase flow at low Reynolds number. We review recent advances in understanding the fundamental mechanics of flexible-tube flows, and discuss physiological applications spanning the cardiovascular system (involving wave propagation and flow-induced instabilities of blood vessels), the respiratory system (involving phonation, the closure and reopening of liquid-lined airways, and Marangoni flows on flexible surfaces), and elsewhere in the body (involving active peristaltic transport driven by fluid-structure/muscle interactions).

Notes: We review the use of ray models for internal waves, particularly formulations for calculating wave amplitudes along the ray. These are expressed in spatial, wave number, and phase-space coordinates. The choice of formulation affects not only the difficulty of the calculations for rays and caustics but also the degree to which the waves satisfy slowly varying assumptions. We describe several examples taken from atmospheric and oceanic applications that illustrate the variety of options for ray models.

Notes: The characterization of blood flow is important for understanding the function of the cardiovascular system under normal and diseased conditions, designing cardiovascular devices, and diagnosing and treating congenital and acquired cardiovascular disease. Experimental methods, especially magnetic resonance imaging techniques can be used to noninvasively quantify blood flow for diagnosing cardiovascular disease, researching disease mechanisms, and validating assumptions and predictions of mathematical models. Computational methods can be used to simulate blood flow and vessel dynamics, test hypotheses of disease formation under controlled conditions, and evaluate devices that have not yet been built and treatments that have not yet been implemented. In this article we review experimental and computational methods for quantifying blood flow velocity and pressure fields in human arteries. We place particular emphasis on providing an introduction to the physics and applications of magnetic resonance imaging, and surveying lumped parameter, one-dimensional, and three-dimensional numerical methods used to model blood flow.

Notes: We review the experimental evidence on turbulent flows over rough walls. Two parameters are important: the roughness Reynolds number ks+ , which measures the effect of the roughness on the buffer layer, and the ratio of the boundary layer thickness to the roughness height, which determines whether a logarithmic layer survives. The behavior of transitionally rough surfaces with low ks+ depends a lot on their geometry. Riblets and other drag-reducing cases belong to this regime. In flows with delta/k 〈 50, the effect of the roughness extends across the boundary layer, and is also variable. There is little left of the original wall-flow dynamics in these flows, which can perhaps be better described as flows over obstacles. We also review the evidence for the phenomenon of d-roughness. The theoretical arguments are sound, but the experimental evidence is inconclusive. Finally, we discuss some ideas on how rough walls can be modeled without the detailed computation of the flow around the roughness elements themselves.

Notes: We review artificial boundary conditions (BCs) for simulation of inflow, outflow, and far-field (radiation) problems, with an emphasis on techniques suitable for compressible turbulent shear flows. BCs based on linearization near the boundary are usually appropriate for inflow and radiation problems. A variety of accurate techniques have been developed for this case, but some robustness and implementation issues remain. At an outflow boundary, the linearized BCs are usually not accurate enough. Various ad hoc models have been proposed for the nonlinear case, including absorbing layers and fringe methods. We discuss these techniques and suggest directions for future modeling efforts.

Notes: Nanofluids, consisting of nanometer-sized solid particles and fibers dispersed in liquids, have recently been demonstrated to have great potential for improving the heat transfer properties of liquids. Several characteristic behaviors of nanofluids have been identified, including the possibility of obtaining large increases in thermal conductivity compared with liquids without nanoparticles, strong temperature-dependent effects, and significant increases in critical heat flux. Observed behavior is in many cases anomalous with respect to the predictions of existing macroscopic theories, indicating the need for a new theory that properly accounts for the unique features of nanofluids. Theoretical studies of the possible heat transfer mechanisms have been initiated, but to date obtaining an atomic- and microscale-level understanding of how heat is transferred in nanofluids remains the greatest challenge that must be overcome in order to realize the full potential of this new class of heat transfer fluids.

Notes: As a result of their fully quantized electronic states and high radiative efficiencies, self-assembled quantum dots have enabled major advances in fundamental physics studies of zero-dimensionality semiconductor systems and in a variety of novel device applications. This article reviews some of the more important recent advances, covering the study and application of both ensembles and single quantum dots. It shows that a comprehensive understanding of the dot electronic structure and dynamical carrier processes is possible and that this knowledge underpins the various device applications.

Notes: We argue that the Kearney/Foreign Policy (KFP) index of globalisation is constructed by making some problematic assumptions about the measurement, normalisation and weighting of the variables included in the index. We propose alternative measurement, normalisation and weighting rules, and using these rules, recalculate the ranking of the fifty countries, using the original KFP data. Specifically, we use, in various combinations: (i) variables ‘adjusted’ for geographical characteristics of countries; (ii) statistically optimal weights obtained by principal components analysis; (iii) a normalisation rule that treats different years of observations separately. We find that the country rankings change significantly when adjusted variables are used, indicating that the original KFP index is partially measuring geographical differences between countries.

Notes: The integration of the former communist countries of central and eastern Europe into the European Union creates a dilemma for the EU's regional policy. The EU's expenditure on regional policy (its ‘active’ regional policy) has been guided by political reactions to deepening or enlarging the EU, not by a rational strategy for regional policy. In contrast, the strong EU instrument of state aid control, developed for competition policy (its ‘reactive’ regional policy) has been relatively successful in avoiding a national race of regional subsidies among the member states. We show that a shift from active regional policy to reactive, competition-oriented, regional policies is the preferred way for the established member states to handle the challenge of enlargement. At the same time, however, this shift is politically difficult for the accession countries to accept, despite the fact that this shift might prove better for them economically. This regional policy dilemma is one of the major obstacles for the full integration of the accession countries into the EU.

Notes: The rules governing trade and capital flows have been at the centre of controversy as globalisation has proceeded. One reason is the belief that trade and capital flows have massive effects on the labour market – either positive, per the claims of international financial institutions and free trade enthusiasts, or negative, per the ubiquitous protestors at WTO, IMF and World Bank meetings demanding global labour standards. Comparing the claims made in this debate with the outcomes of trade agreements, this paper finds that the debate has exaggerated the effects of trade on economies and the labour market. Changes in trade policy have had modest impacts on the labour market. Other aspects of globalisation – immigration, capital flows and technology transfer – have greater impacts, with volatile capital flows creating great risk for the well-being of workers. As for labour standards, global standards do not threaten the comparative advantage of developing countries nor do poor labour standards create a ‘race to the bottom’.

Notes: Developing countries have been increasing their participation in the formal institutions and proceedings of the multilateral trading system. A prominent example is their more frequent involvement as defendants and plaintiffs in GATT/WTO trade disputes. This paper provides an initial economic appraisal of developing country performance in the GATT/WTO dispute settlement system. We measure the economic resolution of these disputes through trade liberalisation gains, and our results suggest that developing country plaintiffs have had more success under WTO disputes than was the case under the GATT. We also document evidence on potential determinants of this success: the capacity for plaintiffs to make credible retaliatory threats and the guilty determinations by GATT/WTO panels. Finally, there is also some evidence that developing countries have recognised the importance of retaliatory threats and have responded by changing their pattern of dispute initiation under the WTO to better take advantage of the instances in which they have sufficient leverage to threaten retaliation and induce compliance with GATT/WTO obligations.

Notes: This paper evaluates Burundi's progress with trade policy reform, by comparing earlier analyses of Burundi's trade policies undertaken in the 1980s with that of the WTO's recent Trade Policy Review. Since the mid-1980s Burundi has been trying to reform its trade and macroeconomic policies against the background of continuous socio-political tensions and periodic outbreaks of violent tribal conflict. A ‘then and now’ comparison allows us to assess both the extent of the trade reforms and of the economic return to those reforms. It is evident that there has been a significant rationalisation and simplification of trade policy. Burundi has eliminated most quantitative import restrictions and reduced the average level and range of its tariffs. The scope for allocative distortions, undesirable redistributive effects and for impediments to investment and growth has been substantially reduced. However, a return to reform in terms of export growth or diversification and of overall economic growth is not discernible yet. This is unsurprising, given the scale of the economic disruption. Sustained socio-political stability, among other things, will be required to induce the investment in human and physical capital needed for a positive return to trade policy reform.

Notes: The World Trade Organisation published a Trade Policy Review of Canada in 2003. In this paper, we discuss the WTO Review and augment the discussion by presenting original data and reviewing the empirical literature. The WTO concludes that Canada's trade regime is open and transparent but maintains barriers in a few important sectors. We subject this claim to empirical scrutiny, comparing Canada's actual imports to a multilateral benchmark based on the gravity equation. We show that Canada imports about what should be expected given the size of its economy and its location. In a second benchmarking exercise, we show that Canada's anti-dumping initiations are in proportion to its imports and that Canada's exports are targeted less by other countries’ anti-dumping investigations than what might be expected based on Canadian export levels. Like many other countries, Canada has pursued trade liberalisation through the World Trade Organisation while simultaneously signing multiple regional trade agreements. Our summary of the recent literature indicates that Canada's regional trade agreements have generated more trade creation than trade diversion. Canada has also spurred imports from the least developed countries by unilaterally eliminating tariffs and quota barriers on 48 of the world's poorest countries in January 2003. We also discuss Canadian progress in opening its agriculture and clothing industries. Overall, we conclude that Canada appears committed to advancing globalisation through multilateral trade liberalisation supplemented by unilateral and bilateral initiatives.

Notes: This paper draws on Hinkle and Schiff (2003). It analyses the planned Economic Partnership Agreements (EPAs) between the EU and Sub-Saharan Africa (SSA) from a development perspective. It does not take a position on whether SSA should enter into EPAs with the EU. Rather, it starts from the notion that the process of forming EPAs is unlikely to be reversed and examines the conditions that will maximise SSA's benefits from the EPAs. If this notion is correct, then the analysis presented in the paper applies. On the other hand, Pascal Lamy, the EU Trade Commissioner, made a proposal at the May 2004 G-90 summit in Dakar that might lead to a change in the EPA process. He proposed that the G-90, a group consisting of ACP and non-ACP LDC countries, should not have to make concessions at the WTO Doha Round of multilateral trade negotiations, i.e., he proposed a ‘free round’ for the G-90. This proposal opens the door to the possibility that the same might apply to the ACP countries in the EU-ACP negotiations and that the EPA process might be reversed. The paper considers the key issues raised by the planned EPAs, their relationship to the WTO's Doha Round and the EU's Everything-but-Arms Initiative, the changes needed to make the EPAs internally consistent, the domestic reforms in SSA that would need to accompany trade liberalisation in both goods and services, and the potential effects of the EPAs on regional integration in SSA. The EPAs will pose a number of policy challenges for SSA countries, including: restructuring of indirect tax systems, reduction of MFN tariffs, liberalisation of service imports on an MFN basis and related regulatory reforms in the services sector, and liberalisation of trade in both goods and services within the regional trading blocs in SSA. The paper also finds that the EPAs provide an opportunity to accelerate regional and global trade integration in SSA. To realise the potential development benefits of the planned EPAs, two steps are essential. First, the EU must, as it has stated, truly treat the EPAs as instruments of development, subordinating its commercial interests in the agreements to the development needs of SSA. Second, the SSA countries need to implement a number of EPA-related trade policy reforms. However, the latter is far from certain, given the lack of reform momentum in SSA.

Notes: Tunisia and Egypt have both recently undertaken significant steps toward trade reform. They have committed to a partnership agreement with the European Union. Both countries have also joined the WTO and are participating in Doha Round discussions on the liberalisation of non-tariff barriers on both goods and services trade. These developments provide an interesting context within which to investigate not only the changes in welfare associated with reforms affecting the trade in goods, but also the impacts of services liberalisation. Using open-economy computable general equilibrium models for both Tunisia and Egypt, this paper explores the reasons why structural differences in these two economies imply different opportunities and challenges with trade reform and services liberalisation. The gains from eliminating barriers at the border for goods trade are significantly greater for Tunisia than Egypt. Both countries, however, gain substantially from liberalisation of foreign direct investment in services. Furthermore, economic growth is more evenly distributed across sectors than with liberalisation of trade in goods alone. In addition to reporting on the impact of alternative policies on income, output, employment and trade, sector-level effects are also considered.

Notes: This paper analyses the impact of rules of origin on patterns of trade in the context of the pan-European system of diagonal cumulation. The paper first highlights the importance of rules of origin in all preferential trading arrangements while arguing that those rules can easily lead to trade suppression and/or trade diversion. We then focus on the introduction of the pan-European system in 1997 and show evidence to suggest that the introduction of the system materially impacted on trade between the EU, and its CEFTA, EFTA and Baltic states partner countries. The main body of the paper then empirically explores the impact of the lack of cumulation in the textile industry on the countries of the Southern Mediterranean. The results suggest that rules of origin may indeed substantially constrain trade between non-cumulating countries, possibly by as much as 70–80 per cent in aggregate. While preferential trading agreements thus serve to increase intra-PTA trade through the liberalisation of trade barriers, they may also be doing so by effectively raising external barriers to trade through the use of constraining rules of origin. To the extent that they do so increases the likelihood of trade diversion and trade suppresion.

Notes: The central theme of this paper is that sustained rapid growth cannot be achieved without rapid growth in trade. A review of the experience during the past four decades offers virtually no examples of countries achieving sustained rapid growth – called miracles in this paper – without simultaneously experiencing sustained rapid growth in trade in the presence of low or high but declining barriers to trade. Simultaneously, the claim that opening to trade leads to sustained income losses is unfounded. A review of the experience of the countries that have faced stagnation or declining per-capita incomes on a long-term basis – called debacles in this paper – reveals no connection to a sustained surge in imports.

Notes: Book reviewsINTERNATIONAL MONETARY FUND, Fiscal Adjustment in IMF-Supported Pro-grams: Evaluation Report.MAGNUS BLOMSTRÖM (ed.), Structural Impediments to Growth in Japan.EDWIN M. TRUMAN, Inflation Targeting in the World Economy.

Notes: This paper discusses the potential impacts of services trade liberalisation on developing countries and reviews existing quantitative studies. Its purpose is to distill themes from current literature rather than to advocate specific policy changes. The picture emerging is one of valiant attempts to quantify in the presence of formidable analytical and data problems yielding only a clouded image of likely impacts on trade, consumption, production and welfare emerging to the point that the policy implications of results are not always clear.A central intuition would seem to be that with genuine two-sided (OECD/non-OECD) liberalisation in services that are seemingly considerably labour-intensive in delivery, the potential should be there for significant developing country gains from global liberalisation allowing full cross-border delivery. However, this picture is neither fully endorsed by available studies, neither is it explicitly contradicted. This seems to be the case for a number of reasons.One difficulty with the studies is that the conceptual underpinnings of what determines trade in services and how this trade differs analytically from that of trade in goods (if at all) is an issue prior to assessments of impacts of liberalisation of trade in services on developing countries being discussed. Key issues here are the treatment of mobility for service providers (both firms and workers), and the differing analytical structures needed to analyse individual service items (banking, insurance, telecoms, etc.). Some recent analytical work suggests that liber-alisation in some service items, such as banking, need not always yield gains, and this contrasts with quantitative studies where analytical structures mirror conventional trade in goods treatments.The discussion and measurement of barriers to service trade in both developed and developing countries is also problematic. One is talking of domestic regulation, entry barriers, portability of providers, competition policy regimes more so than only barriers at national borders, as with tariffs. Both representing and quantifying such barriers raise major difficulties, and these are also spelled out in the paper. Which barriers actually restrict trade, and which do not because they are redundant is one issue, for instance. It is also often misleading to represent barriers in simple ad valorem equivalent form. As a result, numerical modelling work on the effects of service trade barriers which is based on ad valorem equivalent modelling is often not fully convincing.In addition, individual country results vary considerably across studies in ways that it is frequently hard for outsiders to understand. Studies do, however, point towards a tentative conclusion that effects are small and positive for developed and most developing countries if FDI flow changes accompanying service trade liberalisation are excluded from the analysis, but much larger and more variable across countries if they are present. This could be taken to suggest that mode 3 GATS liberalisation (roughly captured in some studies) might be important for developing countries; but mode 4 GATS liberalisation could be even more important given large barriers to labour flows across countries. Thus, if service trade liberalisation is thought of primarily as a surrogate for improved functioning of global factor markets in which more capital flows to developing countries and more labour flows from them to developed countries, then developing countries could benefit in a major way from genuine two-sided (OECD/non-OECD) liberalisation. Developing countries fear, however, that in global negotiations on services liberalisation where there is an asymmetry of power that largely one-sided liberalisation may be the outcome, and their gains will be correspondingly limited. The paper concludes by evaluating econometric studies on linkage between services liberalisation and country growth rules, and briefly discusses some key sectoral issues in health services and transportation.

Notes: Books reviewed:DOUGLAS A. IRWIN, Free Trade Under FireBARBARA BLASZCZYK, IRAJ HOSHI and RICHARD WOODWARD (eds.), Secondary Privatisation in Transition Economies: The Evolution of Enterprise Ownership in the Czech Republic, Poland and SloveniaJAGDISH BHAGWATI (ed.), Going Alone: The Case for Relaxed Reciprocity in Freeing TradeTHEO S. EICHER and STEPHEN J. TURNOVSKY (eds.), Inequality and Growth: Theory and Policy Implications

Notes: We examine in this paper the effects of WTO Accession on policy-making and institutional reforms in transition countries. This is done by looking at the experience of those transition countries which are already Members of the WTO and/or which have recently acceded. We start by trying to distinguish between effects of accession negotiations and from those which are the results of autonomous policy initiatives. The areas of domestic policy-making which are considered in the analysis include market access, governance, government budget, structural reforms, trade and investment arrangements with regional partners and macroeconomic management. We find that no precise blueprint of accession conditions can be ascertained and argue that the WTO played a role, albeit not an exclusive one, in the process of liberalisation. We also find that the costs of WTO Accession are not negligible, but that the benefits of WTO Membership are significant in terms of improved, more predictable, market access and its stability, improved governance and a recourse to better economic policies without significant loss to government revenues.

Notes: In large measure, the voice that developing countries were able to exercise in Cancun was a result of their effective coalition formation. In this paper we present a brief overview of the various coalitions that played an important role at Cancun. The greater part of this paper focuses on one among these various coalitions: the G20 on agriculture. The G20 presents an especially fascinating case of a coalition that combined a great diversity of members and apparently incompatible interests. All theoretical reasoning and historical precedent predicted that the group would collapse in the endgame. And yet the group survived. We investigate the sources of the unity of this group and trace them to a process of learning that allowed the group to acquire certain structural features and develop strategies that helped to cement it further. While our central dependent variable is the cohesion of the G20, we also address the derivative question of the costs and benefits of maintaining such coalitions. The Cancun coalitions give us an excellent case of coalitions that managed to retain their cohesion, but also ended up with a situation of no agreement rather than a fulfilment of even some of their demands. We examine some of the causes behind the impasse in the negotiation process and suggest ways in which future outcomes could be improved.

Notes: This paper sheds light on the risks associated with currency board arrangements, referring to the severe liquidity crisis that emerged in Argentina in November 2000. The inability of the Argentinean economy to grow because of an overvalued peso and the massive borrowing needs of the government in the context of rapidly rising borrowing costs seriously undermined the credibility of the fixed-exchange rate regime. Given the widespread dollarisation of the financial sector on the liability side, Argentina had arguably little choice but to stick to the currency board. A series of measures aimed at reviving growth were implemented but with no signs of upturn in demand, increasingly distrustful international investors and growing social unrest, the country was forced into default in December 2001, putting an abrupt end to its decade long experiment with hard money. This study shows that with rigid labour markets, a lack of fiscal discipline and the absence of a natural anchor currency, Argentina was never a strong candidate for a hard peg.

Notes: For FDI to help alleviate absolute poverty and stimulate economic growth in developing countries, two conditions have to be met. First, developing countries need to be attractive to foreign investors. Second, the host-country environment in which foreign investors operate must be conducive to favourable FDI effects with regard to overall investment, economic spillovers and income growth. This paper argues that it is more difficult to benefit from FDI than to attract FDI. The widely perceived concentration of FDI in few developing countries tends to obscure that, in relative terms, various small and poor countries are fairly attractive to FDI. Yet, the mobilisation of domestic resources remains by far, more important than attracting FDI for financing investment and stimulating economic growth. Furthermore, high inward FDI is no guarantee for poverty alleviation and positive growth effects. In particular, the empirical evidence suggests that host-country conditions typically prevailing in poor countries, including weak institutions and an insufficient endowment of complementary factors of production, constrain the growth-enhancing and poverty-alleviating effects of FDI. The crux is that creating an environment in which FDI may deliver social returns will take considerable time exactly where development needs are most pressing.

Notes: Prior to the onset of the Asian financial crisis there was a deterioration in the external trade position of most countries that were affected by the Asian currency crisis. However, little is known about why this occurred. This paper aims to identify the causes of a slowdown in export growth in Malaysia. While misaligned exchange rates have been widely cited as a cause of the slowdown in East Asia; in the Malaysian context at least a vulnerability to the downturn in the electronic cycle could also be a major factor leading to poor export performance. Using the US/yen dollar rate as a proxy for exchange rate misalignment and US total new orders for electronics as a proxy for global electronics demand, cointegration analysis was used to establish the likely causes of a slowdown in Malaysia's export performance. The empirical evidence suggests that the coincidence of exchange rate misalignment with a downturn in the global electronics demand cycle was responsible for the sharp deterioration in export performance.

Notes: Two basic views can be discerned in post-mortems of Argentina's currency board: (1) that weak fiscal policy was fundamentally to blame, and (2) that the peso had become too severely overvalued for the peg to survive. This paper evaluates the evidence for these rival interpretations. The real effective exchange rate index did not indicate massive overvaluation, but this index does not capture the effects on the equilibrium rate of the ‘sudden stop’ in capital flows to emerging markets after 1998. It also understates the amount of adjustment required for Argentina to reach the equilibrium rate, because neighbour countries’ dollar exchange rates were held up by Argentina's overvaluation, as is indicated by their depreciation in 2002. Argentina was particularly vulnerable to the sudden stop because of the extreme volatility of its portfolio inflows. Fiscal policy simulations suggest that, even with a substantially improved primary balance from 1994 onwards, loss of investor confidence would still have triggered unsustainable debt dynamics once the recession began to bite after 1998. The stagnation of output and prices in Argentina created a yawning gap between the interest rate on debt and the rate of growth of nominal GDP. Had the currency been floated in, say, 1995, the real devaluation of the peso would still have pushed up the debt/GDP ratio, but higher output would have left greater scope for addressing this by running a sizeable primary surplus. Moreover, the more gradual depreciation under floating might have allowed the economy to adjust to higher debt service payments without resort to default. The IMF has criticised itself for not pressing for tighter fiscal policy in the 1990s. A more fundamental criticism would be that it was seduced by the bipolar model into complacency about adjustment to real shocks and forgetting the teachings of optimum currency area theory.

Notes: Books reviewed:Robert E. Litan, Michael Pomerleano and V. Sundararjan (eds), The Future of Domestic Capital Markets in Developing CountriesPedro-Pablo Kuczynski and John Williamson (eds), After the Washington Consensus: Restarting Growth and Reform in Latin America

Notes: Democratising the governance of the IMF will significantly improve the institution's capacity to manage crises. The implementation of a democratic framework requires a reform of the Fund's ‘quota regime,’ which mediates the distribution of voting power. An optimal reform of the quota regime that reflects the increased weight of emerging economies requires matching the number of policy objectives with the number of policy instruments. Presently, there is a classic ‘assignment problem’ whereby one policy instrument (i.e., the quota regime) is aimed at achieving three objectives (i.e., member contribution obligations, access rights, and voting rights). Three different instruments need to be adopted. Member contributions should be based on member's capacity to pay; access to resources should be based on need; and voting rights should balance the rights of creditors with the principle of sovereign equality. These reforms will enhance the Fund's legitimacy and accountability as a forum for global economic policy-making.

Notes: The issue of special and differential treatment (SDT) for developing countries in the WTO has become a source of tension in North-South trade relations. The absence of an effective SDT regime clearly contributed to the failure of the Cancún Ministerial meeting of the WTO. This paper argues for a new approach that puts the emphasis on efforts to improve the development relevance of WTO rules and create mechanisms which allow greater differentiation across WTO members in determining the applicability of WTO disciplines; complemented by non-discriminatory liberalisation of trade in goods and services in which developing countries have an export interest. The former is key in allowing the WTO to expand its reach to new ‘behind the border’ policies; and the latter is important to establishing a development dimension in multilateral trade negotiations.

Notes: In this paper we study the on-going trade dispute between Canada and Brazil on export subsidies in the aircraft industry and the reasons for its escalation. This is a peculiar case of strategic trade policy insofar as the good, i.e. regional jets, is heavily dependent on sub-systems that are imported in the two countries. The hypothesis that the dispute solely derives from the search for rents and externalities is therefore incomplete. Without downplaying the role of interest politics, we argue that in both countries ideas about the goals of trade policy have an important place in explaining why this dispute drags on. For Canada, the belief in a rules-based trading regime has led it to strongly oppose violations, while insecurity about its competitiveness has led to a variety of government schemes to support firms in advanced sectors like aerospace. For Brazil, its place as a leader of the developing world acted as a rallying point for government and firms alike. The research also argues that the WTO process has actually made a resolution of the dispute more difficult by making it too costly for firms and countries to comply with the costs of losing.

Notes: Books reviewed:Kaushik Basu, Henrik Horn, Lisa Román and Judith Shapiro (eds), International Labor StandardsLori G. Kletzer, Imports, Exports, and Jobs: What Does Trade Mean for Employment and Job Loss?Richard Baldwin, Giuseppe Bertola and Paul Seabright (eds), EMU: Assessing the Impact of the EuroIan Bannon and Paul Collier (eds), Natural Resources and Violent Conflict: Options and Actions

Notes: Stochastic simulations are used on the Liverpool Model of the UK to assess the effect of UK euro entry on macroeconomic stability. Instability increases substantially, particularly for inflation and real interest rates. A key factor is the extent of the euro's instability against the dollar; by adopting a regional currency the UK imports this source of shocks, as well as losing its control of interest rates. The results are not highly sensitive to changes in assumptions about the degree of labour market flexibility, the use of fiscal policy, and increased convergence of monetary transmission.

Notes: This paper quantifies the impact on the economies of the world of complete liberalisation of trade in a key services sector, telecommunications, using a global general equilibrium model. Barriers to trade in telecommunications are highest in developing regions and lowest in developed regions. The paper uses new estimates of these barriers for telecommunications. The results indicate that completely liberalising trade in telecommunications would benefit the world as a whole in terms of increased production by 0.1 per cent. Although the distribution of gains among regions is not even, most regions are projected to gain from liberalising trade in telecommunications. In general, the regions with the highest barriers benefit most. The analysis demonstrates that commercial presence of foreign firms via foreign direct investment is an important mode of delivering telecommunications.

Notes: This paper evaluates aid by considering how effective aid has been in exerting leverage on policy choices. It is rather easy to demonstrate that if a country is unwilling to implement policy reforms, attaching conditions to aid will not ensure sustained reform. In this sense conditionality does not work. This ignores the fact that donors, through aid and conditions, can influence recipient policies. The argument of this paper is that if the analysis focuses on channels of influence, one can better identify ways to enhance aid effectiveness. Reform is a slow and difficult process and donors would be more effective ‘development partners’ if they see their role as being to support rather than force this process. In simple terms, donors should provide the information and technical assistance to help governments to make policy choices, rather than dictating choices by imposing conditions.

Notes: This paper examines the concept of global public goods (GPGs) and in that context explores the extent of aid (ODA) presently being diverted to GPG provision and whether such diversion skews aid-flows towards some recipients. These are examined on the basis of OECD data for the late 1990s. The main argument of this paper is that ODA should not be used for financing GPG provision by developing countries. Instead, it is suggested that other sources of financing the provision of GPGs should be developed keeping in view the various technologies by which the GPGs can be produced and design principles for supra-national institutions. Various arguments from Sandler, Barrett and Kanbur are considered. In particular, Kanbur's suggestion of two tensions involving the principles of economies of scale, subsidiarity, economies of scope and specialisation, is explored further.

Notes: In the light of the importance of foreign direct investment (FDI) for the promotion of economic development, this paper examines the impact of the changes in the real exchange rate and its volatility on FDI. Examining Japan's FDI by industries, we found that the depreciation of the currency of the host country attracted FDI, while the high volatility of the exchange rate discouraged FDI. Our results suggest the need to avoid over-valuation of the exchange rate and to maintain stable but flexible exchange rate in order to attract FDI.

Notes: This study sets out to estimate the impact of R&D on productivity within the private sector, with further analysis of the different impacts of R&D within high-tech and traditional manufacturing firms. We also attempt to examine the spillover effects from R&D investment in the high-tech sector on productivity growth within the traditional industries. Using a sample of 136 large manufacturing firms during the period 1994–2000, we develop an extended version of the Cobb-Douglas production function model, and our findings suggest that Taiwan's R&D investment had a significant impact on firm productivity growth, with output elasticity standing at around 0.18. When the sample is divided into high-tech and traditional firms, the R&D output elasticity in high-tech firms is significantly greater than that found in traditional firms. In addition, the average rate of return in high-tech firms is much greater than that estimated for other industries. Besides, our empirical results show that, although significant, the impact of R&D investment from the high-tech sector, on the productivity growth of traditional firms, is rather limited.

Notes: This paper aims at studying the investment flows in the Greater Pearl River Delta region (Hong Kong-PRD) in China and its impacts on industrial restructuring at the firm-level using a business survey with the Hong Kong-PRD entity acted as a core-periphery economy. The critical effects of gravity distance on transaction costs in the determination of investment flows are examined statistically by a gravity model by incorporating a hypothetical infrastructural construction project. Survey findings show that the evolution of the cross-border operations at the main core has directed the outward FDI flows and the subsequent industrial structural adjustments of the core-periphery economy. This paper has presented a typical illustrative case for further studies of investment flows and its impacts upon industrial adjustments and performance in other regions in China especially after the WTO accession. Its implication on regional economic growth is also discussed.

Notes: This paper reviews the historical evidence on the relationship between globalisation and economic growth. Divergence in the growth of income and industrialisation in the twentieth century is documented but it is also noted that international income inequality appears to have decreased since about 1870 and that long-run trends in the Human Development Index are much less pessimistic about the experience of developing countries. It is argued that trade liberalisation has been good for growth on average but that successful capital liberalisation requires high institutional quality and that the developmental state may have an important role to play in the early stages of development. The recent claim by Robert Lucas that the 21st century will see a massive reduction in income inequality across countries in a globalised world economy is sceptically discussed in the context of empirical evidence that bad institutions are often persistent and that geography is still a major factor in explaining international income differences.

Notes: This paper criticises the World Bank as overly optimistic with respect to its ability to fine-tune development aid and to focus it on countries with ‘good’ policies rather than on countries with ‘poor’ policies in order to raise its effectiveness. It is shown that recipient regions showed very different patterns of aid inflows and economic growth in the past and that aid flows yielded the highest correlation to growth when their magnitudes shrank. It is furthermore argued that categorising countries by quality of domestic policies is not only questionable at a given point of time especially in countries with failing governmental institutions and open borders as in many African countries. It suffers also from incentive problems so that countries receiving more aid can become victims of changes in their domestic policies which are more permissive and etatist to the disadvantage of private agents. The paper instead pleads for a shift to aid policies decoupled from country-specifics and more oriented to fundamental ‘beyond border’ problems of the well-being of the poor. An international endowment fund under supranational law should finance research and implementation of research findings related to common international goods as it was suggested by Sachs concerning aids and tropical disease research.

Notes: The escalation of political conflicts in many developing countries and their impact on economic development have been topical issues in recent development literature. The overwhelming emphasis on ‘ethnic conflicts’ in the literature has, however, precluded analysts from looking at political conflicts beyond their ethnic dimension, in the wider context of the development process. In particular, because of the preoccupation with ethnic roots as the prime source of these conflicts, reverse causation, running from economic policy to political conflict, has been virtually ignored in the debate. The purpose of this paper is to fill this gap through an in-depth case study of the ‘twin political conflict’ in Sri Lanka – the Tamil separatist war in the North and the Sinhala youth uprising in the South – with emphasis on its economic roots. The findings suggest that fundamental contradictions in the national development policy in the restrictive trade regime of Sri Lanka were at the heart of the country's twin political conflict.

Notes: The United States maintains a broad spectrum of economic sanctions against China ranging from export controls to prohibitions on certain imports. Our study finds that, although from a macroeconomic perspective, US sanctions have had no significant adverse effect on China's overall economic growth and trade between the two countries, they do have a negative impact on producers and consumers in both countries. US economic sanctions have hindered technology transfer to China and US investment in China. US restrictions on imports from China have caused deadweight losses for the US due to higher domestic production costs for import substitutes and a reduction in consumption. US export controls have hindered US exports to China and contributed to large US trade deficits with China. The export controls have also caused losses of high-paid jobs in the United States and benefited competitors from other countries. In addition, US economic sanctions against China have had significant third-party effects. China's diversification of imports to sources other than the United States may have a long-term effect on US exports to China even after US economic sanctions against China are lifted.

Notes: This paper argues that the process of economic globalisation is to remain partial, because of its continued reliance upon the national institutions in charge of the definition and enforcement of private property rights. Emerging economies often face critical enforcement problems, but the experience of the European Single Market also suggests that, in this respect, institutional convergence remains extremely slow. Second, the globalisation process since 1990 has seen a sharp growth in private inter-temporal contracts, exemplified by private financial transactions and by contracting on intellectual property rights; both are much more vulnerable to local institutional failures than trade in tangible goods and sovereign credits, which were the hallmark of previous phases of international liberalisation. Thus the ‘frontier’ of globalisation now makes markets more exposed to the underlying fragmentation of national property institution than before. This suggests that multilateral negotiation, as an instrument for the coordination of State institutions, will remain the backbone of international economic integration.

Notes: Books reviewed:THEO BALDERSTON (ed), The World Economy and National Economies in the Interwar SlumpBRIAN R. COPELAND and M. SCOTT TAYLOR, Trade and the Environment: Theory and EvidenceKYLE BAGWELL and ROBERT W. STAIGER, The Economics of the World Trading System PRANAB BARDHAN, International Trade, Growth, and Development: Essays by Pranab BardhanMOONJONG TCHA (ed), Gold and the Modern World Economy

Notes: The role of the multilateral aid agencies in the delivery of aid is as old as the debate on the role of aid in economic development. Aid is effective in a good policy environment. However, effective aid delivery is equally important. This is why the need to reform the institutions involved in the process of delivering aid is crucial. Among others, the paper concluded that there is a need for redefining the roles and the establishment of a well articulated network among the various institutions involved in the aid process. More importantly, given the different actors and motives at play in the transfer of resources to recipient countries, the role of a supranational institution to coordinate and give direction is indispensable.

Notes: This paper reports an empirical study of the factors affecting burden sharing among OECD's 22 DAC members in ‘bankrolling’ the multilateral aid agencies. Annual data over 1970–2000, pooled across the donor countries, form the basis for the empirical estimation of each donor's share in the ODA aid receipts for each multilateral agency. Our findings suggest the existence of reverse exploitation, i.e., the financial burden of the agencies is disproportionally carried by the smaller donors. The study also finds that factors such as inherent donor generosity, donor concern for domestic egalitarianism, and the extent to which donors are pro-poor in their bilateral aid policies have an impact on their readiness to support multilateral agencies financially. Size of the donor government and its budgetary balance positively influence burden sharing of contributions to other multilateral agencies. But neither the phase of economic cycle nor the rate of economic growth affects the burden-sharing responsibility of donors. It was also observed that contributions by EU members to the EC do not appear to crowd-out their contributions to other multilateral aid agencies and that right-wing donor governments are generally more parsimonious with regard to financial assistance to multilateral aid agencies. The preferred alternative, particularly among EU member countries, appears to be the EC.

Notes: The crude oil price of the world increased two-fold during 1999–2002. The price of domestic oil products for the same period increased with a smaller percentage, i.e., 27 per cent. This phenomenon could be attributed to Taiwan's oil market liberalisation after 2000 and its entering the WTO since November 2001. According to this study, the effect of entering the WTO itself suppressed the oil price from increase by 15.455 per cent in 2002. It also reduced the inflation rate by 0.74 per cent and increased the economic growth by 0.39 per cent. Nevertheless, entering the WTO also increases the competition in the oil industry, which is a big challenge to the domestic oil refinery sector and the state-owned Chinese Petroleum Corporation in particular. The price decrease of oil products also increases the demand for oil products and exacerbated air pollution and CO2 emissions. For minimising the negative impact of entering the WTO on the economy, the Taiwan government has devised a series of preparations in the last decade. Those preparations include a step-by-step market liberalisation plan, a strategy taken by the state-owned CPC, a new taxation implementation and the legislative works such as the Petroleum Act. This experience might be worthwhile for the reference of other economies.

Notes: Regional diversity in the process of economic growth is the major concern in this paper. We will try to identify its sources for growth and to specify production functions in each province by estimating translog production function. This paper clarifies the following four facts: First, capital accumulation was a major source for growth in the earlier stage of the Chinese economy, especially in the eastern coastal region. Unexpectedly, capital accumulation is losing its ground over the years. Second, the employment structure of the economy in the eastern region has changed significantly and the shares of workers in the secondary and tertiary industries increased until 1992. Since 1992, these figures have not changed significantly despite China's continuous economic high growth. Third, four distinguishable regional growth patterns have contributed to China's economic growth. Finally, production technologies in each province vary both in the direction of factor intensity and in the elasticity of substitution between inputs.

Notes: Ample efforts of FDI literature have researched on the motives and determinants of FDI flows based on ex-ante conditions. Little has been studied with regard to the effects of post-ante behaviour in determining future investment decisions. Post-ante experience of FDI decisions with regard to foreign investors’ satisfaction or dissatisfaction and future profit expectations on recurrent decisions are critical. This paper, thus, attempts to investigate FDI in the context of an emerging market environment with emphasis on how environmental and institutional factors and the micro-firm effects of how investors’ post-ante views on profits expectations and investment experience would affect MNCs’ decisions on recurrent investment and firm relocation. Empirical results show that decisions in the short and long run were affected differently by the factors under study. Specifically, the short-run decisions were more affected by profit expectations while the long run by post-ante experience on investment satisfaction/dissatisfaction and environmental and institutional determinants.

Notes: Various claims have been made about the causes of the Asian crisis and its spread. Here, we use data on the behaviour of capital flows during the crisis to test the strong forms of four such hypotheses, that portfolio investors and hedge funds played a dominant role in initiating and/or spreading the crisis; that moral hazard kept efficient markets from predicting the crisis; and, finally, the common lender hypothesis of Kaminsky and Reinhart. In the process we also test implications of the Calvo-Mendoza model of rational investor ignorance. All are falsified as monocausal explanations. For example, portfolio investments that could not have been subject to substantial moral hazard continued to flow into Asia until very shortly before the crisis. Likewise, banks were a much larger source of capital outflows during the crisis than were portfolio investors. While falsified in their strongest forms, several of these hypotheses in less strong forms should play a role in a more nuanced analysis. It is necessary to move past simple single-factor approaches in order to produce a more complete, synthetic explanation of this episode.

Notes: Books reviewed:Sonja Boehmer-Christiansen and Aynsley Kellow, International Environmental Policy: Interests and the Failure of the Kyoto ProcessRolf Jungnickel (ed.) Foreign-Owned Firms: Are They Different?Thomas Cottier and Petros C. Mavroidis (eds.) Intellectual Property: Trade, Competition, and Sustainable DevelopmentJ. Bruinsma (ed.) World Agriculture Towards 2015/2030: An FAO Perspective

Notes: This paper examines the effects of EU integration in the 1990s on the FDI relations in Europe. We find that the completion of the Single Market, the 1995 enlargement and the so-called Eastern enlargement are characterised by a substantial, positive anticipation effect in the period between the announcement and the formal establishment of each integration step. Neither the Single Market Programme nor the previous enlargement exhibited any further positive effects on intra-EU FDI volumes after their establishment.

Notes: The purpose of this paper is to study selected aspects of Turkish accession to the EU. Joining the EU will require that Turkey attains macroeconomic stability, adopts the Common Agricultural Policy, and liberalizes its services and network industries. Furthermore, joining the EU will require Turkey to adopt and implement the whole body of EU legislation and standards – the acquis communautaire. According to the EU membership criteria, new members must be able to demonstrate the ‘ability to take on the obligations of membership including adherence to the aims of political, economic and monetary union’. Thus Turkey will be expected to adopt the euro when it is ready to do so, but not immediately upon accession. Integration will boost allocative efficiency in the Turkish economy which in turn will make the country a better place to invest. Furthermore, Turkey will reap the benefits from monetary integration and from migration of labour to the EU. But the welfare gains will have a price, and the price will be the adjustment costs associated with the adoption of the acquis communautaire. The final section of the paper considers the effects of accession on the EU in terms of migration and budgetary effects.

Notes: The use of anti-dumping policy has been steadily growing in recent decades, and so has the theoretical and empirical literature on anti-dumping. However, while developing countries as a whole have become at least as active as the ‘traditional’ anti-dumping regimes (the USA, the EU, Canada and Australia), the literature is almost exclusively concerned with the latter group. This article gives an overview of anti-dumping policy and practice in Mexico, one of the leading ‘new’ anti-dumping regimes. It assesses how anti-dumping has expanded since the country began liberalising trade in the mid-1980s, and discusses how the policy has been applied in a protectionist way that is not dissimilar to policy practice in the traditional user countries.

Notes: This paper examines Thailand's pre-crisis exchange rate policy, focusing on the degree of the country's real exchange rate misalignment pre-crisis and its consequent effects on Thailand's trade balance with its two large trading partners, the US and Japan, in the 1980s and 1990s. Defining misalignment as the difference between actual and ‘equilibrium’ exchange rates, we estimate three key ‘equilibrium’ exchange rates of the Thai baht: (a) the real effective equilibrium exchange rate of the Thai baht against its twenty-two major trading partners; (b) the bilateral real equilibrium exchange rates of the baht against the US dollar; and (c) the bilateral real equilibrium exchange rate of the baht against the Japanese yen.