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  • 1
    Electronic Resource
    Electronic Resource
    The preparation and reactions of nickelocyclopentanes (1977)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 99 (1977), S. 3863-3864 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00453a068
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  • 2
    Electronic Resource
    Electronic Resource
    Heat-Transfer Mechanism of Sample-Probe in Variable-Temperature Scanning Probe Microscope and Influence of Temperature on Tunneling Current (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 121-123 (Mar. 2007), p. 673-676 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: The macroscopical breakage and nature change of material usually originate innanometer scale, and the nature of some materials depends on temperature strongly. So it isextremely important for the research of heat transfer in micro-scale and nanometer technology tounderstand and control the influence of temperature on the nature of material, and developingadvanced measuring technique can also improve our knowledge on theories involved in suchproblem. Due to the usage of variable-temperature sample stage, utilizable range of temperature iswidely extended, and thus topography images of materials changing with temperature can beobserved so that the thermal properties of materials can be studied further. Accordingly, thetheoretical basis of heat-transfer and the influence of temperature on tunneling current owing totemperature variation should be presented. In the view of microscale heat-transfer, this paperdescribes the problem that heat current transfers from surface of sample to tip of probe throughlayer of air by means of Boltzmann theory, which can be expressed by the hyperbolic equation ofheat conduction when the time is nearly equivalent to slack time and the scale is much larger thanthe characteristic scale of local thermodynamic equilibrium. The mode of heat-transfer on probe isalso analyzed and the analytical solution is obtained in the paper. In addition, the influence oftemperature increment of sample on tunneling current is discussed in detail and the change trend oftunneling current with temperature is also obtained in a limited temperature range. Due to suchfactors, which are possible to disturb the topography images of sample, there is no doubt that manydifficulties will be brought to developing new technology such as detecting displacement and strainof materials at microscale by using the images of sample heated and unheated. To understand andcontrol such factors has important advantage for making progress in the advanced scientific fields
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.673.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    A scalable storage supporting multistream real-time data retrieval (1999)
    Springer
    Multimedia systems 7 (1999), S. 458-466 
    Details
    ISSN: 1432-1882
    Keywords: Key words:Data placement – Multimedia system – Storage system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract. This paper presents a new data placement scheme for continuous-media playback via a scalable storage system. Multimedia contents are segmented into data blocks for the purpose of being stored, retrieved, and manipulated. If these data blocks belong to some continuous media, then they must be handled in a timely manner, for example, being retrieved before some deadline. One of the main challenges in implementing the above system is the simultaneous retrieval of a great number of different media streams from a very large storage system. The proposed scheme efficiently reduces the seeking delay by a very simple placement method and a retrieval scheduler. Thus, both the storage capacity and the number of concurrent accesses to the storage are scalable. The performance of the proposed scheme is evaluated through a simple analytical model and a practical prototype implementation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s005300050146
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  • 4
    Electronic Resource
    Electronic Resource
    Cure Kinetic Behavior of 191〈sup〉#〈/sup〉 Unsaturated Polyester Resin Used in Advanced Composites (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 326-328 (Dec. 2006), p. 1271-1274 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The cure kinetic properties of 191# resin was studied by means of the differentialscanning calorimeter (DSC) data. Dynamic DSC scanning at four different heating rates (5, 10, 15and 20[removed info]/min) are employed to investigate the cure kinetics. DSC curves show that there are twoexothermal peaks. Kissinger’s method is applied to processing the data. The activation energy Eand pre-exponential factor A were gained by linear regress and the cure kinetics model wasdeveloped. Based on T − β method, the temperatures of cure reaction beginning, maximumreaction rate and reaction ending were obtained. These will help to process designing of unsaturatedpolyester resin used in advanced composite materials
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.1271.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Investigation of Viscosity and Thermodynamic Properties on the Bioleaching Solution with and without Mesophilic Bacteria (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 20-21 (July 2007), p. 149-151 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this study, the viscosities and conductivities of bioleaching solution were determined byUbbelohde viscometer and conductivity meter, respectively. The mean ionic activity coefficients,relative partial molar free energies of copper bioleaching solution at above experimental temperaturesranging from 298 K to 313 K have been calculated. Simultaneously, these characters of copperbioleaching solution were compared with and without mesophilic bacteria. The experimental datashowed that the viscosities and thermodynamic properties for bioleaching solution would be crucialto minimize the third phase formation so as to increase extraction efficiency
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.20-21.149.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Numerical Simulation of Thermal Stress Fields during Gas Quenching (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 575-578 (Apr. 2008), p. 935-940 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this paper, based on the analysis of coupled action of temperature, phasetransformation and stress, the phase transformation condition and equation related to the thermalphysical properties are discussed, and the transient temperature distribution of a Cr12 steel cylinderworkpiece during gas quenching was obtained by solving the governing equations with a nonlinearboundary. According to the theories of thermal non-elasticity, computational mechanics and phasetransformation, a new constitutive equation considering effects of phase transformation with anonlinear surface heat transfer coefficient is proposed and is solved by means of finite elementmethod (FEM). The thermal stress field is obtained and a way of simulating the technology of theheat treatment by computer is explored
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.935.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Experimental Investigation on Friction Performance of Mechanical Seals with a Laser-Textured Seal Face (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 81-84 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Regular micro-surface structure in the form of micro-pores produced on the face ofmechanical seals by laser technology can be used to improve the friction performance of the sealmating rings. A test rig with variable axial load was used to test laser-textured seal rings withmicro-pores of various pore depth and pore ratio to study the effect of the laser-textured seal facestructure parameters on the friction performance of mechanical seals. It is found that there areoptimum texturing face parameters at which the friction torque and the face temperature rise of sealrings are minimum. Results of these tests show that the micro-pores on one of the seal mating facescan generate substantial hydrodynamic effect.Heat generation due to frictional contact on seal-ring surfaces is a major factor that causesdeterioration of face seals and shortens their service life[1,2]. Excessive temperature rise can beavoided by improving structure of a seal surface. By means of laser technology return-flow structure,oblique line groove and spherical micro-pores are engraved on the seal face[3-5]. The researchshows that substantial hydrodynamic effect can be generated between the seal faces withmicro-pores[6-8]. In this study experiments are performed on laser-textured micro-pores seal facesat various axial loads to investigate the effect of the face structure and operating parameters onfriction torque and face temperature rise
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.81.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Experimental study of the DCCl X˜1A′ state vibrational structure by dispersed fluorescence spectroscopy (2002)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 117 (2002), S. 3263-3268 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Dispersed fluorescence spectra following excitation of the DCCl A˜-X˜ vibronic bands between 570 and 620 nm were successfully recorded for the first time using a combination of direct current discharge and supersonic free jet expansion techniques to produce the radical. This is the first experimental study on the DCCl X˜1A′ state vibrational structure. Analysis of the dispersed fluorescence spectra reveals details of the vibrational structure of the DCCl X˜1A′ state. Emission bands to all three vibrational modes were observed and the fundamental vibrational frequencies were determined: 2078 cm−1 (C–D stretch), 893 cm−1 (bend), and 801 cm−1 (C–Cl stretch). Vibrational parameters including anharmonicities and the bend-stretch coupling constant for the DCCl X˜1A′ state were also determined using a least-square fit. In addition, based on our results, the triplet-singlet energy gap (the zero-point level energy gap) could be estimated to be approximately 11±2 kcal/mol. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1485768
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  • 9
    Electronic Resource
    Electronic Resource
    SsaM and SpiC interact and regulate secretion of Salmonella Pathogenicity Island 2 type III secretion system effectors and translocators (2004)
    Oxford, UK : Blackwell Science Ltd
    Molecular microbiology 54 (2004), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The type III secretion system (TTSS) encoded by Salmonella Pathogenicity Island 2 (SPI-2) is required for systemic infection and intracellular replication of Salmonella enterica serovar Typhimurium. The SPI-2 TTSS is activated after internalization of bacteria by host cells, and translocates effector proteins into and across the vacuolar membrane, where they interfere with several host cell functions. Here, we investigated the function of SsaM, a small protein encoded within SPI-2. An ssaM deletion mutant had virulence and intracellular replication defects comparable to those of a SPI-2 TTSS null mutant. Although the ssaM mutant was able to secrete the effector protein SseJ in vitro, it failed to translocate SseJ into host cells, and to secrete the translocon proteins SseB, SseC and SseD in vitro. This phenotype is similar to that of a strain carrying a mutation in the SPI-2 gene spiC, whose product is reported to be an effector involved in trafficking of the Salmonella vacuole in macrophages. Both ssaM and spiC mutants were found to oversecrete the SPI-2 effector proteins SseJ and PipB in vitro. Fractionation assays and immunofluorescence microscopy were used to investigate the localization of SsaM and SpiC in macrophages. No evidence for translocation of these proteins was obtained. The similar phenotypes of the ssaM and spiC mutants suggested that they might be involved in the same function. Pull-down and co-immune precipitation experiments showed that SpiC and SsaM interact within the bacterial cell. We propose that a complex involving SsaM and SpiC distinguishes between translocators and effector proteins, and controls their ordered secretion through the SPI-2 TTSS.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.2004.04297.x
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  • 10
    Electronic Resource
    Electronic Resource
    Study on the Assorted Non-Asbestos Fiber Reinforce Composite by Beater-Addition Process (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 475-479 (Jan. 2005), p. 1051-1054 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In order to get rid of health hazard of asbestos fiber, a new kind of non-asbestos fiber reinforce composite by beater-addition process, which is used for sealing and gasket, has been developed to replace traditional asbestos gasket materials. The mechanical properties of the new composite were tested, and the performance between it and asbestos sheet paper were contrasted. Results show that the density, cross direction tensile strength, machine direction tensile strength andignition loss at temperature of 300°C of the new composite are 1.19g/cm3, 2.62MPa, 3.15MPa and 15.61% respectively, while the performances of asbestos paper produced under the same condition are 1.26g/cm3, 2.87MPa, 3.24MPa and 12.03% respectively. Excellent performance, low cost and simple manufacture process of the new composite make it is possible to substitute traditional asbestos paper and apply widely
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/09/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.475-479.1051.pdf
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