Results 261 to 270 of about 357,861 (309)
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Designing reverse logistics network for product recovery
International Journal of Business Performance and Supply Chain Modelling, 2009Shortened product life cycles result in increasing number of obsolete products, with adverse environmental impact. Manufacturers are facing increasing pressures from consumers and government regulators to become environmentally responsible, and have begun to setup networks to implement product recovery. This paper proposes an approach to design reverse
Ratih Dyah Kusumastuti +2 more
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β-Xylosidase Recovery by Reversed Micelles
Applied Biochemistry and Biotechnology, 2000β-Xylosidase, an enzyme produced by Penicillium janthinellum fungus, was prepurified by fractionated precipitation with ethanol and extracted by reversed micelles of N-benzyl-N-dodecyl-N-bis(2-hydroxyethyl) ammonium chloride (BDBAC) cationic surfactant.
Francislene Andrea Hasmann +2 more
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Reversible Complexes for the Recovery of Dioxygen
1988Dioxygen 1s produced 1n tonnage quantities by the distillation of air at cryogenic temperatures. In recent years, alternative technologies have emerged that employ O2- or N2-select1ve sorbents or O2-permselectlve polymer membranes. New transition metal complexes that can bind O2 reversibly and with high specificity may provide the basis for even better
John A. T. Norman +2 more
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Energy recovery circuits using reversible and partially reversible logic
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, 1996This paper presents a new family of logic gates for low energy computing using pulsed power CMOS logic. The logic gates use the principles of adiabatic-switching and results show that in typical cases 90% of the energy can be recovered with operating frequency around 1 MHz.
null Yibin Ye, K. Roy
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Desalination, 1990
Abstract As a means to minimize or eliminate brine disposal problems, high recovery RO must be accompanied by pre- or post-treatment to avoid scale precipitation, almost entirely by CaSO4. All such methods will add to water cost. However, rigorous comparison must be made with the costs and constraints of brine disposal at recoveries low enough not ...
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Abstract As a means to minimize or eliminate brine disposal problems, high recovery RO must be accompanied by pre- or post-treatment to avoid scale precipitation, almost entirely by CaSO4. All such methods will add to water cost. However, rigorous comparison must be made with the costs and constraints of brine disposal at recoveries low enough not ...
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Reverse recovery failure modes in modern fast recovery diodes
2000 22nd International Conference on Microelectronics. Proceedings (Cat. No.00TH8400), 2002In this paper, reverse recovery failure modes in modern fast power diodes are investigated. By the aid of semiconductor device simulation tools, a better view is obtained for the physical process, and operating conditions at which both diode snappy recovery and dynamic avalanching phenomenas occur during the recovery period in modern high frequency ...
M.T. Rahimo, N.Y.A. Shammas
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Reversal of recovery direction during creep recovery of polymer blends
Journal of Rheology, 1995At small stresses or strains, polymeric liquids show a linear viscoelastic behavior. This can be demonstrated in creep followed by creep recovery.
H. Gramespacher, J. Meissner
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1997
Abstract Peace brought perils as grave as any in wartime for such City firms as Kleinwort, Sons & Co. At the end of the war in 1918 their acceptances were down to a mere £5m. from the 1913 high of £14.2m. Due to increased trading in the Americas, however, the partners’ capital had grown slightly to £4.6m., which was £263,000 more ...
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Abstract Peace brought perils as grave as any in wartime for such City firms as Kleinwort, Sons & Co. At the end of the war in 1918 their acceptances were down to a mere £5m. from the 1913 high of £14.2m. Due to increased trading in the Americas, however, the partners’ capital had grown slightly to £4.6m., which was £263,000 more ...
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REVERSE RECOVERY OF POWER pn JUNCTION DIODES
Journal of Circuits, Systems and Computers, 1995A quasi-steady state approximation is used to derive expressions for the waveforms of minority carrier charge stored in p+nn+ power junction diodes driven by large-signal sinusoidal and ramp voltages. These waveforms are derived by solving a diode charge-control differential equation.
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Evolution of reverse recovery in trench MOSFETs
2020 32nd International Symposium on Power Semiconductor Devices and ICs (ISPSD), 2020The interaction between the reverse recovery charge and the output charge in trench power MOSFETs is discussed. As the trade-off between the on-resistance and the gate charge improves, the output capacitance has more impact on the reverse recovery losses.
A. Ferrara +5 more
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