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Search Results: 1 - 10 of 826 matches for " Satoru "
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Case Studies of Energy Saving and CO2 Reduction by Cogeneration and Heat Pump Systems  [PDF]
Satoru Okamoto
Open Journal of Energy Efficiency (OJEE) , 2013, DOI: 10.4236/ojee.2013.22014

This paper describes two case studies: 1) a cogeneration system of a hospital and 2) a heat pump system installed in an aquarium that uses seawater for latent heat storage. The cogeneration system is an autonomous system that combines the generation of electrical, heating, and cooling energies in a hospital. Cogeneration systems can provide simultaneous heating and cooling. No technical obstacles were identified for implementing the cogeneration system. The average ratio between electric and thermal loads in the hospital was suitable for the cogeneration system operation. An analysis performed for a non-optimized cogeneration system predicted large potential for energy savings and CO2 reduction. The heat pump system using a low-temperature unutilized heat source is introduced on a heat source load responsive heat pump system, which combines a load variation responsive heat pump utilizing seawater with a latent heat-storage system (ice and water slurry), using nighttime electric power to level the electric power load. The experimental coefficient of performance (COP) of the proposed heat exchanger from the heat pump system, assisted by using seawater as latent heat storage for cooling, is discussed in detail.

Energy-Saving and Economical Evaluations of a Ceramic Gas Turbine Cogeneration Plant  [PDF]
Satoru Okamoto
Open Journal of Energy Efficiency (OJEE) , 2013, DOI: 10.4236/ojee.2013.22012

A ceramic gas turbine can save energy because of its high thermal efficiency at high turbine inlet temperatures. This paper deals with the thermodynamic and economic aspects of a ceramic gas turbine cogeneration system. Here cogeneration means the simultaneous production of electrical en-ergy and useful thermal energy from the same facility. The thermodynamic performance of a ceramic gas turbine cycle is assessed using a computer model. This model is used in parametric studies of performance under partial loads and at various inlet air temperatures. The computed performance is compared to the measured performance of a conventional gas turbine cycle. Then, an economic evaluation of a ceramic gas turbine cogeneration system is investigated. Energy savings provided by this system are estimated on the basis of the distributions of heat/power ratios. The computed economic evaluation is compared to the actual economic performance of a conventional system in which boilers produce the required thermal energy and electricity is purchased from a utility.

On the Application of the Laplace Transform in the Study of Phillips-Type Stabilization Policy  [PDF]
Satoru Kageyama
Theoretical Economics Letters (TEL) , 2015, DOI: 10.4236/tel.2015.56080
Abstract: This paper provides a reformulation of Phillips’s multiplier-accelerator model with stabilization policy in terms of the Laplace transform. Applying the Laplace transform, the differential equations of the economy are transformed into the algebraic ones on a complex variable. The transfer functions of economic variables are defined by these algebraic equations. With this representation, we show the effects of Phillips-type policy on equilibrium level and derive the necessary and sufficient condition for asymptotic stability.
Multidrug Delivery Systems with Single Formulation——Current status and Future Perspective  [PDF]
Tatsuya Okuda, Satoru Kidoaki
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2012, DOI: 10.4236/jbnb.2012.31007
Abstract: Development of new way and system for multidrug delivery has recently attracted much attention and became one of major issue in drug delivery research. Although this research field is still immature compared to the single drug delivery system, intensive efforts have recently been devoted by researchers in order to realize more efficient, functional, and safe combination therapy using multiple drugs or agents. In this review article, we outline several targets in terms of application for biochemical modulation together with various concrete attempts of simultaneous and sequential delivery of multiple drugs or agents with single formulation. Finally, we will also summarize the possible contribution of biomaterial sciences and nanobiotechnology for improvement of future multidrug delivery system.
Diamond Particles Deposited among Nickel/Copper Particles in Energy Controlled CH4/H2 RF Discharge Plasmas  [PDF]
Junichi Emi, Satoru Iizuka
Journal of Surface Engineered Materials and Advanced Technology (JSEMAT) , 2012, DOI: 10.4236/jsemat.2012.23025
Abstract: Formation of diamond particles was investigated in an energy-controlled CH4/H2 radio-frequency (RF) discharge plasma. Here, in particular, it was examined how diamond particles grew on a nickel substrate under an influence of Cu vapor that was supplied from a heated Cu wire. Here, the plasma was generated by a hollow-magnetron-type (HMT) RF plasma source at the frequency of 13.56 MHz. Total pressure was kept at 100 mTorr. Diamond particles grew besides Ni and Cu particles. From Raman spectrum the substrate surface was covered with thin graphite film deposited as a background layer. It was shown that diamond could grow in a self-organized manner even when the other atomic gas species such as Ni and Cu were contained in the gas at the same time during the growth process.
On Revealed Preference and Indivisibilities  [PDF]
Satoru Fujishige, Zaifu Yang
Modern Economy (ME) , 2012, DOI: 10.4236/me.2012.36096
Abstract: We consider a practical market model in which all commodities are inherently indivisible and thus are traded in integer quantities, or consumption choices are available only in discrete quantities. We ask whether a finite set of price-quantity observations satisfying the Generalized Axiom of Revealed Preference (GARP) is consistent with utility maximization. Due to the absence of perfect divisibility and continuity, the existing argument and also familiar assumptions such as non-satiation cannot be used in the current discrete model. We develop a new approach to deal with this problem and establish a discrete analogue of Afrita’s celebrated theorem. We also introduce a new concept called tight budget demand set which is a natural refinement of the standard notion of demand set and plays a crucial role in the current analysis. Exploring network structure and a new and easy-to-use variant of GARP, we propose an elementary, simple, combinatorial and constructive proof for our result.
Production of CH4 in a Low-Pressure CO2/H2 Discharge with Magnetic Field  [PDF]
Keisuke Arita, Satoru Iizuka
Journal of Materials Science and Chemical Engineering (MSCE) , 2015, DOI: 10.4236/msce.2015.312011
Abstract: Production of CH4 has been established using a low-pressure square-pulse cross-field CO2/H2 discharge with magnetic field. The conversion rate from CO2 to CH4 was investigated by changing the discharge parameters such as applied power and discharge distance, together with magnetic field strength. Carbon dioxide was reduced by hydrogen. The discharge took place across the magnetic field inside a glass tube. Decomposition of CO2 and CH4 selectivity are found to be dependent on power density. Energy efficiency for methane production is increased in a narrow discharge. Preferable improvements of CO2 decomposition, CH4 selectivity, and energy efficiency were established.
Analysis of Langmuir Probe Characteristics for Measurement of Plasma Parameters in RF Discharge Plasmas  [PDF]
Kohgi Kato, Satoru Iizuka
Journal of Applied Mathematics and Physics (JAMP) , 2016, DOI: 10.4236/jamp.2016.49185
Abstract: A simple method for measuring RF plasma parameters by means of a DC-biased Langmuir probe is developed. The object of this paper is to ensure the reliability of this method by using the other methods with different principles. First, Langmuir probe current \"\"response on RF voltage \"\" superimposed to DC \"\" biased probe was examined in DC plasmas. Next, probe current response of DC biased probe in RF plasmas was studied and compared with the first experiment. The results were confirmed by using an emissive prove method, an ion acoustic wave method, and a square pulse response method. The method using a simple Langmuir probe is useful and convenient for measuring electron temperature \"\" , electron density \"\" , time-averaged space potential \"\" , and amplitude of space potential oscillation \"\" in RF plasmas with a frequency of the order of \"\" .
A Simple Overexpression Technique and Purification of CSK, A Mammalian Tyrosine Kinase Using Baculovirus Expression Vector System and its Activity
Satoru Takeuchi
Research Journal of Biological Sciences , 2012,
Abstract: The Escherichia coli expression system is the most popular and frequently available system because its various recombinant proteins are economically and quickly obtainable. However, production of cell cycle proteins and toxic genes, in particular, expression of mammalian proteins would be difficult in that system. Baculovirus Expression Vector System (BEVS), which uses insect cells, offers more advantages than the E. coli expression system because most of the produced mammalian proteins retain their correct folding and activity. However, cell maintenance costs much time and expense. Our simple technique in BEVS has demonstrated its expression efficiency with such a high level that expression of C-SRC tyrosine kinase (CSK), an oncogenesis controllable protein, increased 2-3 times over that of cultured Spodoptera frugiperda Sf9 insect cells in 2 days than by the ordinary technique.
Insulin glulisine in the management of diabetes
Satoru Yamada
Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy , 2009, DOI: http://dx.doi.org/10.2147/DMSO.S3404
Abstract: sulin glulisine in the management of diabetes Review (6281) Total Article Views Authors: Satoru Yamada Published Date July 2009 Volume 2009:2 Pages 111 - 115 DOI: http://dx.doi.org/10.2147/DMSO.S3404 Satoru Yamada1,2 1Diabetes Center, Kitasato Institute Hospital, Tokyo, Japan; 2Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan Abstract: Insulin glulisine is appealing in principle, but the advantages of this drug over the other rapid-acting insulin analogs are still relatively unknown. The frequency of hypoglycemia, convenience in the timing of administration, and improvements in terms of HbA1c seem similar among the rapid-acting insulin analogs, including insulin glulisine. Only properly randomized long-term clinical studies with insulin glulisine will reveal the true value of this novel insulin analog.
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