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  • 1
    Electronic Resource
    Electronic Resource
    A CORBA-based agent-driven design for distributed intelligent manufacturing systems (1998)
    Springer
    Journal of intelligent manufacturing 9 (1998), S. 457-465 
    Details
    ISSN: 1572-8145
    Keywords: Agent-based analysis ; autonomous ; cooperation ; CORBA ; intelligent manufacturing system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An agent-oriented methodology is presented for representation, acquisition, and processing of manufacturing knowledge along with analysis and modeling of an intelligent manufacturing system (IMS). An intelligent manufacturing system adopts heterarchical and collaborative control as its information system architecture. The behavior of the entire manufacturing system is collaboratively determined by many interacting subsystems that may have their own independent interests, values, and modes of operation. The subsystems are represented as agents. An agent's architecture and task decomposition method are presented. The agent-oriented methodology is used to analyze and model an intelligent machine cell. An intelligent machine center is considered as an autonomous, modular, reconfigurable and fault-tolerant machine tool with self-perception, decision making, and self-process planning, able to cooperate with other machines through communication. The common object request broker architecture (CORBA) distributed software control system was developed as a simple prototype. A case study illustrates an intelligent machine center.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008800717777
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  • 2
    Electronic Resource
    Electronic Resource
    A methodology of developing product family architecture for mass customization (1999)
    Springer
    Journal of intelligent manufacturing 10 (1999), S. 3-20 
    Details
    ISSN: 1572-8145
    Keywords: Product family architecture ; mass customization ; product development ; design management
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Mass customization, aiming at delivering an increasing product variety that best serves customer needs while keeping mass production efficiency, has recently received numerous attention and popularity in industry and academia alike. This paper presents a methodology of developing product family architecture (PFA) to rationalize product development for mass customization. Systematic steps are developed to formulate a PFA in terms of functional, technical and physical views. The diverse needs of customers are matched with the capabilities of a firm through systematic planning of modularity in three consecutive views. The development of a PFA provides a unifying integration platform to synchronize market positioning, commonality employment and manufacturing scale of economy across the entire product realization process. A case study in an electronics company is reported to illustrate the potential and the feasibility of PFA methodology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008926428533
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of the chitin synthetase inhibitor plumbagin and its 2-demethyl derivative juglone on insect ecdysone 20-monooxygenase activity (1988)
    Springer
    Cellular and molecular life sciences 44 (1988), S. 990-991 
    Details
    ISSN: 1420-9071
    Keywords: Cytochrome P-450 ; ecdysone 20-monooxygenase ; juglone ; plumbagin ; steroid hydroxylase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The chitin synthetase inhibitor plumbagin and its 2-demethyl derivative juglone were found to inhibit in a dose-response fashion the cytochrome P-450 dependent ecdysone 20-monooxygenase activity associated with adult femaleAedes aegypti, wandering stage larvae ofDrosophila melanogaster, and fat body and midgut from last instar larvae ofManduca sexta. The concentration of these naphthoquinones required to elicit a 50% inhibition of the steroid hydroxylase activity in all the insects was approximately 1×10−4 M.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01939896
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  • 4
    Electronic Resource
    Electronic Resource
    Effects of the adenylate cyclase activator forskolin and its inactive derivative 1,9-dideoxyforskolin on insect cytochrome P-450 dependent steroid hydroxylase activity (1992)
    Springer
    Cellular and molecular life sciences 48 (1992), S. 39-41 
    Details
    ISSN: 1420-9071
    Keywords: Adenylate cyclase ; cytochrome P-450 ; ecdysone 20-monooxygenase ; forskolin ; steroid hydroxylase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The adenylate cyclase activator forskolin and its pharmacologically inactive derivative 1,9-dideoxyforskolin were found to inhibit in a dose-dependent fashion the ecdysone 20-monooxygenase activity associated with wandering stage larvae ofDrosophila melanogaster and fat body and midgut from last instar larvae of the tobacco hornworm,Manduca sexta. The concentrations of these labdane diterpenes required to elicit a 50% inhibition of the cytochrome P-450 dependent steroid hydroxylase activity in the insect tissues ranged from approximately 5×10−6 to 5×10−4 M.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01923603
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  • 5
    Electronic Resource
    Electronic Resource
    Amino acid absorption in jejunum and ileum in vivo — a kinetic comparison of function on surface area and regional bases (1981)
    Springer
    Cellular and molecular life sciences 37 (1981), S. 265-266 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Maximum absorptive capacities (Vmax) for the jejunum and ileum corrected for the presence of an unstirred layer of water have been calculated for glycine, valine and methioninein vivo in fowls per unit surface area and per region. Vmax per cm2 showed that ileal enterocytes had a greater absorbing capacity than jejunal for glycine and valine but not for methionine. Vmax for glycine and valine, calculated for the whole jejunum and ileum, however, were not different but for methionine the jejunal value was 1.9 times greater than the ileal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01991646
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  • 6
    Electronic Resource
    Electronic Resource
    Superluminality and parelectricity: The ammonia maser revisited (1995)
    Springer
    Applied physics 60 (1995), S. 259-265 
    Details
    ISSN: 1432-0649
    Keywords: 41.20.Cv ; 42.25.Bs ; 42.52,+x
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is well known that the inversion of populations in the ammonia maser leads to stimulated emission, and hence amplification, of microwaves. However, it is not well known that an inverted medium also leads to the superluminal propagation of off-resonance, finite-band-width wave packets, whose phase, group, energy, and “signal” velocities, as defined by Sommerfeld and Brillouin, all exceed the vacuum speed of lightc. Einstein causality is not violated, since the front velocity isc. The inversion of populations also implies a parelectric medium with negative electric susceptibility. (Parelectric media should not be confused withparaelectric media, which are ferroelectrics just above their Curie points.) The existence of a parelectric medium implies the possibility of the levitation of an electrical charge in the vacuum above this medium, as well as stable electrostatic configurations of charges placed inside an evacuated cavity surrounded by this medium. The apparent violation of Earn-shaw's theorem will be discussed. Numerical estimates for a proposed experiment to observe parelectricity will be given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01135871
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  • 7
    Electronic Resource
    Electronic Resource
    The effects of feeding by Oniscus asellus on leaf litter sulfur constituents (1987)
    Springer
    Biology and fertility of soils 3 (1987), S. 107-111 
    Details
    ISSN: 1432-0789
    Keywords: Oniscus asellus ; Leaf litter ; Acer negundo ; A. saccharum ; Fagus grandifolia ; Picea rubens ; Tsuga canadensis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Feeding by the isopod, Oniscus asellus, produced changes in the sulfur constituents of leaf litter substrates (Acer negundo, A. saccharum, Fagus grandifolia, Picea rubens, and Tsuga canadensis). Isopod consumption of leaf litter generally accelerated the mineralization of carbon-bonded S and increased the formation of ester sulfate in all substrates. After the isopod egestion of A. negundo leaves, fecal decomposition over 6 weeks increased total S concentration from 68 to 120 μmol S/g due to the catabolism of organic carbon. During the same period sulfate decreased from 34 to 20 μmol S/g and carbon-bonded S increased from 34 to 100 μmol S/g. Thus the total S pool in aged feces became enriched with organic S (83% of total S). Macroinvertebrate consumption accelerated the transformation of S constituents and the carbon-bonded S concentration approached that of the Oa organic horizon of a northern hardwood forest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00260589
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  • 8
    Electronic Resource
    Electronic Resource
    Disturbance effects on soil solution chemistry due to heating cable installation (1996)
    Springer
    Biology and fertility of soils 22 (1996), S. 40-44 
    Details
    ISSN: 1432-0789
    Keywords: Key words Northern hardwoods ; Disturbance in soil ; Nitrogen ; Soil warming
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Installation of heating cables for warming soil was used to evaluate the effect of disturbance on soil solution chemistry within a northern hardwood forest (Adirondack Mountains, New York). Differences in response among treatments suggested the importance of both the depth and timing of cable installation. There were increases (p〉0.05) in many solutes within pilot study plots in which “surrogate cable” was installed at 15 cm depth. Most notably, mean nitrate concentrations for the 1st year following disturbance were 744 μeq l–1 at 15 cm depth compared to 7 μeq l–1 for the non-disturbed control. A comparison of pilot plots with 5 cm cable depth and an unheated soil-warming control plot with the same cable disturbance showed that the seasonality of soil disturbance may have a key role in response to disturbance. The soil solution response was diminished if installation occurred during the spring, a period of rapid uptake of nitrogen by vegetation. Mean nitrate concentrations were 176 μeq l–1 for 5-cm pilot plots (installed in fall 1991) versus 6 μeq l–1 for 5-cm, unheated soil-warming control plots (installed in spring 1992). Disturbance effects were attenuated over time and not generally apparent 1 year after installation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384430
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  • 9
    Electronic Resource
    Electronic Resource
    Disturbance effects on soil solution chemistry due to heating cable installation (1996)
    Springer
    Biology and fertility of soils 22 (1996), S. 40-44 
    Details
    ISSN: 1432-0789
    Keywords: Northern hardwoods ; Disturbance in soil ; Nitrogen ; Soil warming
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Installation of heating cables for warming soil was used to evaluate the effect of disturbance on soil solution chemistry within a northern hardwood forest (Adirondack Mountains, New York). Differences in response among treatments suggested the importance of both the depth and timing of cable installation. There were increases (p〉0.05) in many solutes within pilot study plots in which “surrogate cable” was installed at 15 cm depth. Most notably, mean nitrate concentrations for the 1st year following disturbance were 744 μeq l-1 at 15 cm depth compared to 7 μeq l-1 for the non-disturbed control. A comparison of pilot plots with 5 cm cable depth and an unheated soil-warming control plot with the same cable disturbance showed that the seasonality of soil disturbance may have a key role in response to disturbance. The soil solution response was diminished if installation occurred during the spring, a period of rapid uptake of nitrogen by vegetation. Mean nitrate concentrations were 176 μeq l-1 for 5-cm pilot plots (installed in fall 1991) versus 6 μeq l-1 for 5-cm, unheated soil-warming control plots (installed in spring 1992). Disturbance effects were attenuated over time and not generally apparent 1 year after installation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384430
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  • 10
    Electronic Resource
    Electronic Resource
    The effects of feeding byOniscus asellus (Isopoda) on nutrient cycling in an incubated hardwood forest soil (1989)
    Springer
    Biology and fertility of soils 7 (1989), S. 239-246 
    Details
    ISSN: 1432-0789
    Keywords: Nutrient cycling ; Oniscus asellus ; Hardwood forest soil ; Leaching ; Macrofauna
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Oniscus asellus produced changes in the nutrients leached from Oie and Oa horizons of a hardwood forest soil. Soil with isopods lost more K+ (54%) from the Oie horizon and more Ca2+ (25%), Mg2+ (40%), and water-extractable S (23%) from the Oa horizon than soil without isopods. In contrast, soils with isopods lost less Ca2+ (39076) from the Oie horizon and less dissolved C-bonded S (33%) from the Oa horizon than soil without isopods. In addition, the Oia and Oa horizons exhibited different nutrient dynamics. When isopods were present, the Oa horizon leachates accumulated more Na+ K+, Ca2+, Mg2+, NO3 − , water-soluble SO4 2−, and dissolved C-bonded S, and the Oie horizon retained more of these nutrients. The type of leaching solution also had a major effect on nutrients. Leaching with a simulated soil solution resulted in smaller nutrient losses for K+ and Mg2+ in both horizons and for Na+, Ca2+, and NO3 − in the Oa horizon than leaching with distilled water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00709655
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