bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of a user authentication system based on public key certificates for healthcase information service in national university hospitals
Authors: Sakamoto Norihiro 
Published: August 2003

AbstractIn the development of healthcare information networks, a serious problem is assuring the security of the healthcare information. At the present stage, the national university hospitals are among the most advanced medical facilities in terms of healthcare information networks. However, it sometimes happens that a subsystem without strict user authentication is present even in the healthcare information system of a national university hospital. Consequently, the authors developed a system that can provide security services such as user authentication, user management, and privilege management. The proposed system can easily be built into the existing healthcare information system. Since user authentication, user management, and privilege management are integrated, a healthcare information system with greater security than in the past can be realized. Furthermore, public key certificates and attribute certificates are used. Consequently, the system can be extended in the future to a wide‐area user authentication system based on the public key framework in the national university hospital network and the local healthcare network. This paper describes the design and implementation of the national university healthcare information user authentication system and provides an introduction to the existing university hospital healthcare information system. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 2, 86(9): 53–63, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecjb.10181
Automatic testing of embedded software based on state‐transition requirement specifications
Authors: Nakajima Tsuyoshi , Bessho Yuzo , Yamanaka Hiroshi , Hirota Kazumi 
Published: August 2003

AbstractThis paper proposes an automatic testing method in which the testing data is constructed on the basis of state‐transition specifications and the testing of real machines with embedded software is automatically performed. In automatic testing based on specifications, in general a test scenario with the same extent of abstraction as the specification is difficult to convert to testing data that can be used by the automatic tester. In the proposed testing method, the event action in the state‐transition specification is related to the setting and referral of the memory value in the embedded debugger, which makes it possible to convert the test scenario to testing data and to perform the testing automatically. A CASE tool to support the proposed testing method is realized and its performance is evaluated. The effectiveness and the problems of the proposed testing method are noted. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 2, 86(9): 64–75, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecjb.10182
pSAS/c: Pseudo set associative and shared with competitive cache
Authors: Inoue Keisuke , Amano Hideharu 
Published: August 2003

AbstractToday, low‐cost, high‐performance processors are required in many products such as portable terminals and network appliances, and the demand for on‐chip multiprocessors is increasing. The authors have proposed a semi‐shared pseudo set associative cache for on‐chip multiprocessors, or pSAS, which offers both high speed of the snoop cache and on‐chip cache memory efficiency of the shared cache. Although pSAS can directly access other caches with some delay, its performance deteriorates if it continues to access other caches. In this article, we propose the pSAS/c cache that solves this problem by copying frequently accessed data into self‐cache and accessing it as fast as the snoop cache. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 2, 86(9): 76–84, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecjb.10183
A study of series‐parallel changeover circuit of a capacitor bank for an energy storage system utilizing electric double‐layer capacitors
Authors: Sugimoto Shigeyuki , Ogawa Shigeaki , Katsukawa Hiroyuki , Mizutani Hiroshi , Okamura Michio 
Published: August 2003

AbstractElectric double‐layer capacitors showing a remarkably high energy density (compared with conventional electrolytic capacitors) are now under development. Capacitors of this type have significant advantages, namely, high durability against repeated charge and discharge and no need for maintenance. Therefore, we have studied feasible basic circuit configurations and control methods required to apply electric double‐layer capacitors as an energy storage element in output‐power leveling systems for solar cells or windmill power generators, and in uninterruptible power supply systems. This paper discussed operating methods for a capacitor bank to improve the efficiency. High efficiency has been demonstrated by the simulations and the experiments. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 145(3): 33–42, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10155
Insulation characteristics of GIS under nonstandard lightning‐impulse oscillations: Insulation characteristics under single‐frequency oscillations with various frequencies and damping ratios
Authors: Yuasa Sadayuki , Suzuki Hirofumi , Okabe Shigemitsu 
Published: August 2003

AbstractTo improve GIS insulation specifications, it is important to recognize the insulation characteristics under oscillatory overvoltage waveforms occurring in the field. This paper describes investigations of insulation characteristics for single‐frequency oscillatory waveforms with various frequencies and damping ratios. It was found that minimum breakdown voltages (Vmin) rose with frequency rising under the same damping condition and Vmin rose with damping ratio rising under the same frequency condition. From an analysis of actual breakdown voltage characteristics, the probability of breakdown at a valley of oscillation rose with damping increasing. It was found that the insulation characteristics were treated all‐inclusively based on the characteristics of Vmin for rise time or damping time. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 145(3): 43–49, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10156
Time–frequency analysis of lamb waves caused by partial discharges and free particles in GIS
Authors: Kozako Masahiro , Ohtsuka Shinya , Matsuhisa Takashi , Hikita Masayuki 
Published: August 2003

AbstractWe investigated the propagation properties of Lamb waves in a GIS tank, using time–frequency analysis to diagnose the insulation performance of GIS. We measured the acoustic signals excited by metallic particles colliding with the tank sheath, and those emitted by partial discharge in the GIS. The wavelet transform was used to decompose the wave data into its time–frequency components. As a result, it was confirmed that Lamb waves with the dispersive property of the velocity are excited and propagate in a spiral path along the tank wall due to the cylindrical structure of the tank. Taking these results into consideration, we propose a new technique for identification of defect locations in GIS based on time–frequency analysis of acoustic signals with the wavelet transform. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 145(3): 25–32, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10163
Identification of linear systems with time delay and unknown order
Authors: Harada Ken'ichi , Kobayashi Yasuhide , Okita Tsuyoshi 
Published: August 2003

AbstractThis paper proposes a system identification method for linear systems with time delay and unknown order. We hypothesize a number of candidate models, which have different order, because system order is unknown. In each model, we estimate the model parameters based on the maximum likelihood method by using nonlinear optimization technique. Then both local optimization technique and global search method are used because the estimated parameters may fall into a local minimum. After all candidate model's parameters are estimated, one model is selected among these models to estimate the system order by using a posteriori probability based on Bayes's theorem. Finally, the validity of the proposed method is demonstrated by numerical examples. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 145(3): 61–68, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10166
Two‐dimensional field analysis of a cylindrical synchronous machine by variables separation and a fast calculation method of steady‐state characteristics
Authors: Kumano Teruhisa 
Published: August 2003

AbstractThis paper proposes a new method for the magnetic field analysis of a synchronous machine with a cylindrical rotor. It gives the two‐dimensional magnetic field distribution in the machine by solving a partial differential equation which describes the steady‐state balanced operation. Radial and rotational components of the magnetic permeability and resistivity are independently defined to take into account the magnetic anisotropy inherent in its slotting structure. The study machine is divided into several coaxial cylinders, where the potential distribution is described by a few parameters, which are to be solved to satisfy the boundary value conditions between every neighboring cylinder.The proposed method is applied to a model generator, and the calculation results agree well with FEM analysis which has been shown to agree well with measured data. Because it needs no massive numerical calculation, high computing speed is expected which enables us to apply it to multimachine power system analysis. Moreover, it can be expected to handle the effects of magnetic saturation by combinatorial use with the perturbation‐based scheme. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 145(3): 69–79, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10204
Walsh function‐based position sensorless control for interior permanent magnet motor drives using ripple‐current of high‐frequency triangular‐wave‐carrier PWM inverter
Authors: Choeisai Krit , Kobayashi Naoto , Kondo Seiji 
Published: August 2003

AbstractThis paper proposes the Walsh function‐based position sensorless drive method of a PM motor by using high‐frequency 20‐kHz triangular‐wave‐carrier PWM inverter ripple current. The proposed method uses the Walsh harmonic of PWM inverter ripple current to estimate the motor rotor position. By using the high‐frequency switching ripple current, the period of the rotor position estimation has been decreased and improves the step response of PM motor. The Walsh function makes it possible to use a definite integrator as the Walsh harmonic detector that can separate the small ripple‐current signal from the motor drive‐current signal. The Walsh harmonic detector circuit consists of less parts than the Fourier harmonic detector circuit. The validity of the proposed method was clarified by several experimental results. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 145(3): 80–88, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10205
Mechanism of voltage rise of high‐current arc at atmospheric pressure due to deion plates
Authors: Nakayama Kazuo , Yokomizu Yasunobu , Matsumura Toshiro , Kanamori Eiji , Kuwamura Kazuo 
Published: August 2003

AbstractA molded‐case circuit breaker has deion plates to raise an arc voltage. To understand the phenomenon of a rise in an arc voltage due to deion plates, an arc current, arc voltage, and voltages between the deion plates were measured for high‐current air arc. The peak value of the arc voltage rose with a decrease in distance between the deion plates and electrodes. This rise resulted from the voltages between the deion plates. The voltage between the deion plates was found to consist of two voltages: (1) an arc‐column voltage and (2) the voltage occurring between the arc column and the surface of the deion plates. These voltages (1) and (2) proved to be 2.3 V/mm and 25 V, respectively. On the basis of these results, the expression of the arc voltage affected by the arrangement of the deion plates was derived to be a function of current. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 145(3): 17–24, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10213
Time series prediction with a neural network model based on bidirectional computation style: An analytical study and its estimation on acquired signal transformation
Authors: Wakuya Hiroshi , Shida Katsunori 
Published: August 2003

AbstractNumerous studies on time series prediction have been undertaken by a variety of researchers. Most of them typically usedunidirectionalcomputation flow, that is, present signals are applied to the model as an input and predicted future signals are derived from the model as an output. On the contrary,bidirectionalcomputation style has been proposed recently and applied to prediction tasks. A bidirectional neural network model consists of two mutually connected subnetworks and performs direct and inverse transformations bidirectionally. To apply this model to time series prediction tasks, one subnetwork is trained a conventionalfutureprediction task and the other is trained an additional task forpastprediction. Since the coupling effects between the future and past prediction subsystems promote the model's signal processing ability, bidirectionalization of the computing architecture makes it possible to improve its performance. Furthermore, in order to investigate the acquired signal transformation, two kinds of chaotic time series—the Mackey–Glass time series and “Data Set A”—are adopted in this paper. As a result of computer simulations, it has been found experimentally that the direct and inverse transformations developed independently and their information integration give the bidirectional model an advantage over the unidirectional one. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 145(3): 50–60, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10232
Voltage and reactive power control in power systems by genetic algorithm considering system decomposition and control process
Authors: Aoki Hidenori , Mizutami Yoshibumi 
Published: August 2003

AbstractThis paper presents a new approach to optimal voltage and reactive power control based on a genetic algorithm (GA), and attempts to shorten the time of the GA, which calculates the control process. For this purpose, a network is decomposed into subsystems by means of region/area information, and the control counts of the controller are considered in the voltage and reactive power control. Therefore, some methods that give the control procedure are proposed in the GA algorithm. The effectiveness of the proposed method is demonstrated by practical 15‐ and 118‐bus systems. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 145(3): 1–16, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10242
B cell receptor signaling mediates immediate protection from Fas‐induced apoptosis upstream of caspase activation through an atypical protein kinase C isozyme and de novo proteinsynthesis
Authors: Hinshaw Jennifer A. , Mueller Carolyn M. , Scott David W. , Williams Mark S. 
Published: August 2003

AbstractSignaling through the B cell receptor (BCR) of normal splenic B cells, as well as B cell lymphoma lines, can abrogate Fas‐mediated apoptosis. Using the B lymphoma line A20.2J, BCR signaling immediately inhibited Fas‐induced apoptosis upstream of caspase‐8 activation, as determined by Ile‐Glu‐Thr‐Asp‐(IETD)ase activity and cleavage of the caspase‐8 substrate Bid. Furthermore, following overexpression of a human Fas:FLICE construct, which directly induces caspase activation in a death‐inducing signaling complex‐independent manner, cells could not be protected through BCR stimulation.Co‐incubation with cycloheximide partially reversed protection from apoptosis and increased Fas‐stimulated initiator and effector caspase activation, suggesting new protein synthesis is necessary to induce protection upstream of caspase activation. Furthermore, co‐incubation with a broad‐spectrum protein kinase C (PKC) inhibitor, such as bisindolylmaleimide (Bis), also partially reversed protection from apoptosis, and examination of a panel of PKC inhibitors suggested a role for atypical isozymes in protection. Bis also acted to increase initiator and effector caspase activation upon anti‐IgG and anti‐Fas treatment. These data suggest that BCR‐induced protection is being mediated upstream of initiator caspase activation, and is partially dependent upon both PKC family members and new protein synthesis.
Down‐regulation of CD20 on B cells upon CD40 activation
Authors: Anolik Jennifer , Looney R. John , Bottaro Andrea , Sanz Iñaki , Young Fay 
Published: August 2003

AbstractCD20 is a B cell‐specific surface antigen that is thought to play an important role in B cell activation and proliferation, possibly by functioning as a calcium channel or interacting with other cell surface molecules important in B cell signal transduction, such as CD40. In this study, it was found that stimulation through CD40 caused a dramatic decrease in the expression of surface CD20 in normal human B lymphocytes. Down‐regulation of CD20 was time and ligand concentration dependent, beginning as early as 15 min after incubation with CD40 ligand‐transfected fibroblasts. The rapid onset of this effect in the presence of stable steady‐state mRNA levels suggests that CD20 down‐regulation occurs at a nontranscriptional level. Confocal fluorescent microscopy indicates that CD20 and CD40 are internalized upon CD40 activation. Specifically, CD20 translocates into lipid rafts and is internalized into cytoplasmic vesicles, in a process that is inhibited by cytochalasin B andprotein kinase C antagonists. Paradoxically, one functional consequence of CD20 down‐regulation was enhanced calcium signaling upon CD20 cross‐linking. These observations support the notion that CD20 engages downstream signaling pathways that alter calcium homeostasis rather than functioning as a calcium channel itself, such signal transduction is enhanced upon CD20 internalization, and CD40 is a regulator of CD20‐mediated signaling.
Localization of peptide/MHC class II complexes in macrophages following antigen processing of viable Streptococcus pyogenes
Authors: von Delwig Alexei , Ramachandra Lakshmi , Harding Clifford V. , Robinson John H. 
Published: August 2003

AbstractThe subcellular localization of peptide/MHC complexes was investigated during processing of the surface M5 protein from Streptococcus pyogenes. Bone marrow‐derived macrophages were pulsed with viable S. pyogenes for 20 min followed by various periods of chase. T hybridoma cells detected complexes of one epitope, M517–31 with Ed on the surface of macrophages within 30 min of chase. In contrast, complexes with another epitope, M5308–319 with Ad peaked later. Intracellular localization of peptide/MHC‐II complexes was studied by subcellular fractionation and detection of complexes in fractions by T hybridoma cells. M517–31/Ed complexes were detected in light membrane fractions containing plasma membrane and early endosomes by 10–30 min. M5308–319/Ad complexes were detected in these light membranes after 3 h of chase. Thus, the time course of M5308–319/Ad presentation was delayed relative to M517–31/Ed. However, neither type of complex was detected at any time in fractions containing phagosomes. Both species of peptide/MHC complexes localized to endocytic compartments, indicating a role for endosomes in presentation of antigens from phagocytosed bacteria.
CD1d‐restricted NKT cells contribute to malarial splenomegaly and enhance parasite‐specific antibody responses
Authors: Hansen Diana S. , Siomos Mary‐Anne , de Koning‐Ward Tania , Buckingham Lynn , Crabb Brendan S. , Schofield Louis 
Published: August 2003

AbstractCD1d‐restricted NKT cells are a novel T cell lineage with unusual features. They co‐express some NK cell receptors and recognize glycolipid antigens through an invariant T cell receptor (TCR) in the context of CD1d molecules. Upon activation through the TCR, NKT cells produce large amounts of IFN‐γ and IL‐4. It has been proposed that rapid cytokine output by activated NKT cells may induce bystander activation of other lymphoid lineages. The impact of CD1d‐restricted NKT cell activation in the induction of B cell‐mediated immune responses to infection is still unclear. We show here that CD1‐restricted NKT cells contribute to malarial splenomegaly associated with expansion of the splenic B cell pool and enhance parasite‐specific antibody formation in response to Plasmodium berghei infection. The increased B cell‐mediated response correlates with the ability of NKT cells to promote Th2 immune responses. Additionally, antibody responses against the glycosylphosphatidylinositol (GPI)‐anchored protein merozoite surface protein 1 (MSP‐1) were found to be significantly lower in CD1–/– mice compared to wild‐type animals. P. berghei‐infected MHC class II (MHCII)–/– mice also generated antibodies against MSP‐1, suggesting that antibody production against GPI‐anchored antigens in response to malaria infection can arisefrom both MHCII‐dependent and independent pathways.
Comparison of the transcriptional regulation of classical and non‐classical MHC class II genes
Authors: Hake Sandra B. , Tobin Helen M. , Steimle Viktor , Denzin Lisa K. 
Published: August 2003

AbstractThe class II transactivator (CIITA) regulates expression of the classical and non‐classical MHC class II genes, HLA‐DR, ‐DP, ‐DQ and ‐DM, but not the B cell‐specific HLA‐DO (DO). Here we show that only HLA‐DR expression is completely dependent on CIITA, since residual expression of HLA‐DM, ‐DP and the β chain of DQ was observed in CIITA‐deficient RJ2.2.5 cells. Although DO shows a unique expression pattern compared to other MHC class II genes, prolonged IFN‐γ treatment of HeLa cells induced DOB expression. Similar to all MHC class II promoters, the DOB promoter contains thehighly conserved W, X1, and Y boxes in addition to a putative OCT box. Mutational analysis of the DOB promoter demonstrated that the X1, Y and OCT boxes are necessary for maximum promoter activity.Furthermore, our results demonstrate that CREB‐1, RFXANK and Oct‐2 occupy the DOB promoter in vivo, However, CIITA and Bob‐1 were only minimally recruited. Finally, fusion of Bjab, a DOB‐negative B cell line, with .174 B cells that lack the complete MHC class II region (including the DO genes), lead to DO expression. These data indicate that the expression of DO is regulated by an unidentifiedfactor in B cells.