6,436 research outputs found
Solubilities, vapor pressures, densities, and viscosities of the LiBr+LiI+HO(CH2)(3)OH+H2O system
No full textThe lithium bromide + lithium iodide + 1,3-propanediol + water (LiBr/LiI mole ratio = 4 and (LiBr + LiI)/HO(CH2)(3)OH mass ratio = 4) solution was selected as the potential working fluid for an air-cooled absorption chiller, and its basic four thermophysical properties were measured. The solubilities were measured in the range of absorbent (LiBr + LiI + HO(CH2)(3)OH) concentration from 70.0 mass % to 77.8 mass %. The vapor pressures were measured in the ranges of temperature and absorbent concentration from 339.75 K to 444.35 K and from 55.0 mass % to 80.0 mass %. Both the densities and viscosities were measured in the temperature and concentration ranges of 283.15 K to 343.15 K and 25.0 mass % to 75.0 mass %, respectively. The individual data set was correlated with a regression equation with high accuracy. The absorption chiller using the new solution as a working fluid is expected to have a wide operation range without the danger of crystallization, which is the critical problem in constructing an air-cooled absorption chiller.This work was supported by Grant No. 97-2-10-03-01-3 from the
Basic Research Program of the KOSEF and also partially by the
Brain Korea 21 Project
2 species of Caligus (Copepoda, Caligidae) parasitic on black-sea bream (Acanthopagrus-schlegeli) cultured in Taiwan.
No full textTwo species of caligidae (Copepoda) parasitic on cultured rabbit fish (Siganus fuscescens) in Taiwan.
No full textDevelopmental stages of Caligus epidemicus Hewitt, a copepod parasite of tilapia cultured in brackish water.
No full textProviding absolute differentiated services for optical burst switching networks: loss differentiation
No full textThe provision of absolute differentiated services for optical burst switching (OBS) networks based on dynamic wavelength assignment is investigated. Unlike existing quality of service (QoS) schemes, such as buffer-based and offset-time based ones, the proposed dynamic virtual lambda partitioning (DVLP) scheme does not mandate any buffer or extra offset time, but can achieve absolute service differentiation between classes. This new DVLP scheme shares wavelength resources based on several different class priorities in an efficient and QoS guaranteed manner. Furthermore, DVLP is robust: this means that each traffic class, with a loss probability conforming to the target value, continues to receive the required QoS, despite the presence of misbehaving packets, such as bursty arrival traffic. The conditions in which the DVLP scheme is feasible are stated, and the performance results are given for the proposed scheme, which effectively guarantees the target loss probability of each traffic class, both in Poisson and self-similar traffic environments.This work was supported in part by the Korea Science and
Engineering Foundation (KOSEF) through the OIRC
projec
Species of Caligus Muller, 1785 (Copepoda: Caligidae) parasitic on marine fishes of Taiwan.
No full textDevelopment of Caligus multispinosus Shen, a caligid copepod parasitic on the black sea bream (Acanthopagrus schlegeli) cultured in Taiwan.
No full textPerformance evaluation of absorption chiller using LiBr+H2N(CH2)(2)OH+H2O, LiBr+HO(CH2)(3)OH+H2O, and LiBr+(HOCH2CH2)(2)NH+H2O as working fluids
No full textIn order to check the theoretical performance of new working fluids LiBr + H2N(CH2)(2)OH + H2O, LiBr + HO(CH2)(3)OH + H2O, and LiBr + (HOCH2CH2)(2)NH + H2O [LiBr/H2N(CH2)(2)OH, LiBr/HO(CH2)(3)OH, and LiBr/(HOCH2CH2)(2)NH mass ratios were 3.5] which were developed particularly for the air-cooled cycle operation, the theoretical coefficients of performance (COPs) were calculated at various operating conditions. The cooling capacity and crystallization problem were also checked at a specific condition for air-cooled cycle operation. All the solutions were found to be of possibe use as working fluids for the air-cooled absorption chiller as alternatives to the conventional LiBr + H2O solution (C) 1998 Elsevier Science Ltd. All rights reserved
Absolute differentiated services for optical burst switching networks using dynamic wavelength assignment
No full textIn this paper, we address how to provide absolute differentiated services for optical burst switching (OBS) networks based on dynamic wavelength assignment. Unlike existing Quality of Service (QoS), such as buffer-based and offset-time based schemes, our proposed Dynamic Virtual Lambda Partitioning (DVLP) scheme does not mandate any buffer or extra offset time, but can achieve absolute service differentiation between classes. This new DVLP scheme shares wavelength resources based on several different class priorities in an efficient and QoS guaranteed manner. Furthermore, DVLP is placed on robustness: this means that each traffic class with loss probability conforming to the target value continue to receive the required QoS, despite the presence of misbehaving packets such as bursty arrival traffics. We also state the conditions in which the DVLP is feasible. The feasible condition can be determined from the target loss probabilities that result with minimum loss probabilities based on the number of available wavelengths in each class. We then show the performance results of proposed scheme which effectively guarantees the target loss probability of each traffic class, both in long and short term periods.This work was supported in part by the Korea Science and Engineering Foundation
(KOSEF) through the OIRC project
Chosen logistics processes in Škoda JS
No full textThis master thesis deals with the purchase and sale process in Škoda JS company. The aim of this work is to assess whether the setting of the purchase and sale process is met by the company also within a real business case, in compliance with set controls, and whether the degree of perfect delivery is sufficient. In the introduction, the author specifies the basic terms: logistics, logistic chain, customer benefits, information systems in logistics, buying and selling. The following chapter introduces Škoda JS company, including the sphere of its entrepreneurial activity. This chapter also deals with the nuclear power industry. In the crucial chapter, the author describes the process of purchase and sale in Škoda JS company and compares it with a real business case. In conclusion, the author evaluates discrepancies and suggests recommendations to avoid them
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