bluuebunny/crossref_metadata_2025_split huggingface dataset:
A scheduled controller design of congestion control considering network resource constraints
Authors: Naito Hiroyuki , Azuma Takehito , Fujita Masayuki 
Published: July 2004

AbstractIn this paper, we consider a dynamical model of computer networks and derive a synthesis method for congestion control. First, we present a model of TCP/AQM (Transmission Control Protocol/Active Queue Management) as a dynamical model of computer networks. The dynamical model of TCP/AQM networks consists of models of TCP window size, queue length, and AQM mechanisms. Second, we propose to describe the dynamical model of TCP/AQM networks as linear systems with self‐scheduling parameters, which also depend on information delay. Here we focus on the constraints on the maximum queue length and TCP window size, which are the network resources in TCP/AQM networks. We derive TCP/AQM networks as the LPV system (linear parameter varying system) with information delay and self‐scheduling parameter. We design a memoryless state feedback controller of the LPV system based on a gain‐scheduling method. Finally, the effectiveness of the proposed method is evaluated by using MATLAB and the well‐known ns‐2 simulator (Network Simulator Version 2). © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 149(1): 61–68, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10341
A comment on results of recent pooled analyses of epidemiological papers related to cancer and power‐line magnetic fields
Authors: Amemiya Yoshifumi 
Published: July 2004

AbstractIn June 2001, the International Agency for Research on Cancer (IARC) classified ELF magnetic fields as a possible human carcinogen based on the results of two recent pooled analyses by Ahlbom et al. and Greenland et al. on epidemiological papers for childhood leukemia. Examining their data, this author read information other than theirs: in the paper by Ahlbom et al., for instance, 9 cases were prepared for verifying the hypothesis that magnetic fields are associated with childhood leukemia, and this author considers that the general conclusion derived by inductive inference is that the hypothesis is not supported, because 2 cases of the 9 support the hypothesis and 7 cases do not, although the hypothesis has been accepted by many people for about 20 years; furthermore, the author does not consider that the IARC's evaluation that risk doubles in excess of 3 or 4 mG is based on the general conclusion, because it is derived from pooling two kinds of data, one of which is the 7 cases bringing the “general conclusion,” and the other is the remaining 2 cases being the “particular fact.” © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 148(4): 59–64, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10344
Detection of abnormal movement of industrial robot based on eigenspace representation of image sequence
Authors: Seki Hirokazu , Hori Yoichi 
Published: July 2004

AbstractIn this paper, a monitoring system for industrial robots working in factories is proposed. This system detects different movements based on learning and immediately reports to the operator. It has the advantage that there is no need to receive any signal from the robot controller because it only observes with a simple camera such as a CCD camera. For the detection method, the eigenspace method is used, which is excellent in compression of image data and calculations of the correlation among images. The parametric eigenspace method is also used to detect abnormalities such as the speed of movement. Some experiments using two‐axis robots show the effectiveness of the proposed method. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 148(4): 74–83, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10352
Examination of detection of a minute fluctuation signal by the theory of the natural observation method
Authors: Okubo Kan , Takeuchi Nobunao 
Published: July 2004

AbstractA known signal with random noise was analyzed using the theory of the natural observation method. This novel waveform analysis method incorporates instantaneous signal characteristics. The natural observation method possesses the important characteristic of providing real‐time analysis. In this study, it was shown that a minutely fluctuating signal in noise can be detected clearly by the natural observation transform. As an example application, an atmospheric electrical variation signal was analyzed using the natural observation transform in order to clarify a minute atmospheric electrical fluctuation signal associated with seismic wave propagation. The results demonstrated the utility of applying the natural observation method to observation signals of electromagnetic phenomena that occur during an earthquake. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 148(4): 1–8, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10354
Comprehensive evaluation of a CO2‐capturing NOx‐free repowering system with utilization of middle‐pressure steam in a thermal power plant
Authors: Sik Pak Pyong 
Published: July 2004

AbstractA CO2‐capturing NOx‐free H2O turbine power generation system is proposed in which middle‐pressure steam produced in a thermal power plant is utilized to increase generated power when demand for electricity is large. The proposed system can capture all the generated CO2 based on the oxygen combustion method and emits no NOx, so that it causes no urban or global environmental problems. A combined cycle power generation system with 200 MW gas turbine power output is adopted as an example of a thermal power plant. It was assumed that 32 t/h of steam with 25kg/cm2 pressure produced by the waste heat recovery boiler was utilized in the proposed system. It has been shown through simulation study that increase of power output by 11.8 MW or 4.51% of the rated output is possible with no efficiency decrease. The amount of CO2 emission reduction is estimated to be 19,600 t/y. The unit cost of generated power is estimated to be 8.38 yen/kWh, annual gross profit of the proposed system 271 million yen, depreciation year 4.87, and thus the proposed system is estimated to be economically feasible. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 148(4): 34–40, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10356
Fundamental performance of the disc‐type thermomagnetic engine
Authors: Takahashi Yutaka , Matsuzawa Tomohiro , Nishikawa Masahiro 
Published: July 2004

AbstractThis paper describes the fundamental performance of the disc‐type thermomagnetic engine. The disc‐type engine has been designed in order to decrease the eddy current braking loss. Performance characteristics such as power, torque, and loss have been measured and compared with those of the cylindrical engine under the condition of the same volume of temperature‐sensitive magnetic material. The eddy current braking loss is 0.04 W, which corresponds to 1/30 the loss in the cylindrical engine at a rotation speed of 0.4 rps with maximum power output. The total loss including partial losses due to friction, the hydraulic effect, and the eddy current braking is 0.9 W in the disc‐type engine and is 1.8 W in the cylindrical engine. The total loss in the disc‐type engine is reduced to 50% of that in the cylindrical engine under the same conditions mentioned above. The maximum output power is 6.0 W at the rotation speed of 0.4 rps in the disc‐type engine, which is about 1.6 times greater than that of the cylindrical engine. The eddy current braking loss in the disc‐type engine is 0.7% of the value of the maximum output power, which is a negligible effect in this engine. The power per unit volume of the disc reaches a maximum value at a disc width of 40 mm. The clearance between discs was determined to be 1 mm in order to keep the working fluid flow conditions constant. The rotor thickness includes the clearance and the disc thickness. The power per unit rotor thickness also has a maximum value at a disc thickness of 0.5 mm. A thermomagnetic engine with the optimum conditions can be designed by using these results. When the permanent magnet fixes the size constant, the disc‐type engine generates high output power in comparison with the cylindrical engine at the point of effective use of a magnetic field. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 148(4): 26–33, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10359
A decentralized scheduling method for flowshop problems with resource constraints
Authors: Nishi Tatsushi , Konishi Masami , Hasebe Shinji 
Published: July 2004

AbstractIn this paper, we propose a decentralized scheduling method for flowshop scheduling problems with resource constraints using the Lagrangian decomposition and coordination approach. When a flowshop scheduling problem with resource constraints is decomposed into machine‐level subproblems, the decomposed problem becomes very difficult to solve so as to obtain the optimal solution, even when the production sequence of operations is given. In this study, the decomposed subproblems are solved by a simulated annealing algorithm combined with dynamic programming. By decomposing the problem into single machine subproblems, the changeover cost can easily be incorporated in the objective function. In order to reduce the computation time, a heuristic algorithm for calculating the starting times of operations is also proposed. The performance of the proposed method is compared with that of the simulated annealing method by which the schedule of the entire machine is successively improved. Numerical results have shown that the proposed method can generate better solutions than the conventional method. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 149(1): 44–51, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10364
Equivalent circuit modeling of discharge current injected in contact with an ESD‐gun
Authors: Fujiwara Osamu , Tanaka Hideyuki , Yamanaka Yukio 
Published: July 2004

AbstractThe transient electromagnetic (EM) fields caused by an electrostatic discharge (ESD) have broadband frequency spectra, which cause serious failure to high‐tech information equipment. From this perspective, ESD testing for the EM immunity of the equipment is specified by IEC 61000‐4‐2, in which the detailed waveform of the discharge current injected onto the IEC recommended Pellegrini target in contact with an ESD‐gun is prescribed for calibration. However, the factors for determining the current waveform remain unclear, and thus the IEC prescribed current waveform is unlikely to be injected into actual equipment. In this study, based on the structure of an ESD‐gun, an equivalent circuit modeling is proposed for analyzing the discharge current injected onto a 50‐Ω SMA connector instead of the IEC target that has frequency‐dependent transmission characteristics. Its validity is confirmed by comparing the calculated current waveform with the measured result. The proposed circuit modeling is also validated from measurement of the discharge current injected onto a transmission line by the ESD‐gun. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 149(1): 8–14, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10367
CO2 reduction effect of the utilization of waste heat and solar heat in a city gas system
Authors: Okamura Tomohito , Matsyuhashi Ryuji , Yoshida Yoshikuni , Hasegawa Hideo , Ishitani Hisashi 
Published: July 2004

AbstractWe evaluated total energy consumption and CO2 emissions in the phases of a city gas utilization system from obtaining raw materials to consuming the product. Assuming monthly and hourly demand figures for electricity, heat for space heating, and hot water in a typical hospital, we explore the optimal size and operation of a city gas system that minimizes the life cycle CO2 emissions or total cost. The cost‐effectiveness of conventional cogeneration, a solar heating system, and hybrid cogeneration utilizing solar heat is compared. We formulate a problem of mixed integer programming that includes integral parameters that express the state of system devices such as the on/off condition of switches. As a result of optimization, the hybrid cogeneration can reduce annual CO2 emissions by 43% compared with the system without cogeneration. The sensitivity of CO2 reduction and cost to the scale of the CGS is also analyzed. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 149(1): 22–32, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10369
Digital sliding mode servo systems with preview feedforward compensation
Authors: Sato Tadashi , Egami Tadashi , Tsuchiya Takeshi 
Published: July 2004

AbstractA new design method of digital preview sliding mode servo system is proposed. In this method, sliding mode regulator theory is applied to an augmented error system. The equivalent control which makes the states of the error system stay on the switching surface is employed. Then, the sliding mode controller is designed. Preview sliding mode servo system using this control has merits of both the preview control and the sliding mode control. Computer experimental results on LDM position control systems show the effectiveness of the proposed design method. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 149(1): 33–43, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10374
Effect of artificial mixtures of environmental polycyclic aromatic hydrocarbons present in coal tar, urban dust, and diesel exhaust particulates on MCF‐7 cells in culture
Authors: Mahadevan Brinda , Parsons Heather , Musafia Tamara , Sharma Arun K. , Amin Shantu , Pereira Cliff , Baird William M. 
Published: July 2004

AbstractHuman exposure to polycyclic aromatic hydrocarbons (PAHs) occurs through complex mixtures. The National Institute of Standards and Technology has established standard reference materials (SRMs) for selected PAH mixtures that are composed of carcinogenic, noncarcinogenic, and weakly carcinogenic compounds, such as those derived from coal tar (SRM 1597), atmospheric particulate matter (SRM 1649), and diesel particulate matter (SRM 1650). To study the effects of PAHs with different carcinogenic potential in complex mixtures, and to investigate the metabolic activation of noncarcinogenic and weakly carcinogenic PAHs to DNA‐binding derivatives, artificial mixtures (1597H, 1649H, and 1650H) were prepared in the laboratory. These artificial mixtures contained the same relative ratios of noncarcinogenic and weakly carcinogenic PAHs present in SRM 1597, SRM 1649, and SRM 1650. The human mammary carcinoma‐derived cell line MCF‐7 was treated with these artificial mixtures and analyzed for PAH‐DNA adduct formation and the induction of cytochrome P450 (CYP) enzymes. We found that the artificial mixtures formed lower but detectable levels of DNA adducts 24 and 48 hr after treatment than benzo[a]pyrene. Induction of CYP enzyme activity was measured by the ethoxyresorufin‐O‐deethylase assay, and the expression of CYP1A1 and CYP1B1 was confirmed by immunoblots. Both noncarcinogenic and weakly carcinogenic PAHs present in the artificial mixtures have the ability to induce CYP1A1 and CYP1B1 in MCF‐7 cells and contribute to DNA binding. Therefore, it is necessary to take into account the noncarcinogenic and weakly carcinogenic PAHs present in environmental mixtures in assessing the potential risk associated with human exposure. Environ. Mol. Mutagen. 44:99–107, 2004. © 2004 Wiley‐Liss, Inc.
Dose‐ and time‐dependent responses for micronucleus induction by X‐rays and fast neutrons in gill cells of medaka (Oryzias latipes)
Authors: Takai Akinori , Kagawa Nao , Fujikawa Kazuo 
Published: July 2004

AbstractMedaka fish (Oryzias latipes) were exposed to various doses of X‐rays or fast neutrons, and the frequency of micronucleated cells (MNCs) was measured in gills sampled at 12‐ or 24‐hr intervals from 12 to 96 hr after exposure. The resulting time course of MNC frequency was biphasic, with a clear peak 24 hr after exposure, irrespective of the kind of radiation applied and the dose used. The half‐life of MNCs induced in the gill tissues by the two exposures fluctuated around 28 hr, with no significant dose‐dependent trend for either X‐ray‐ or neutron‐exposed fish. As assayed 24 hr after exposure, the MNC frequency increased linearly over the control level with increasing doses of both X‐rays and fast neutrons. The relative biological effectiveness (RBE) of fast neutrons to X‐rays for MNC induction was estimated to be 4.3 ± 0.6. This value is close to the RBE value of 5.1 ± 0.3 reported for fast neutron induction of somatic crossing‐over mutations in Drosophila melanogaster that arise from recombination repair of DNA double‐strand breaks. These results and other data support our conclusion that the medaka gill cell micronucleus assay is a reliable short‐term test for detecting potential inducers of DNA double‐strand breaks. Environ. Mol. Mutagen. 44:108–112, 2004. © 2004 Wiley‐Liss, Inc.
Updating ARMA predictions for temporal aggregates
Authors: Koreisha Sergio G. , Fang Yue 
Published: July 2004

AbstractThis article develops and extends previous investigations on the temporal aggregation of ARMA predications. Given a basic ARMA model for disaggregated data, two sets of predictors may be constructed for future temporal aggregates: predictions based on models utilizing aggregated data or on models constructed from disaggregated data for which forecasts are updated as soon as the new information becomes available. We show that considerable gains in efficiency based on mean‐square‐error‐type criteria can be obtained for short‐term predications when using models based on updated disaggregated data. However, as the prediction horizon increases, the gain in using updated disaggregated data diminishes substantially. In addition to theoretical results associated with forecast efficiency of ARMA models, we also illustrate our findings with two well‐known time series. Copyright © 2004 John Wiley & Sons, Ltd.
A randomized trial of continuous infusion versus bolus mitoxantrone in combination with cytarabine in newly diagnosed patients with acute myeloblastic leukemia
Authors: Koc Yener , Oyan Basak , Kars Ayse , Tekuzman Gulten , Canpinar Hande , Kansu Emin 
Published: July 2004

AbstractMitoxantrone (MTZ) has been shown to be effective in the treatment of newly diagnosed acute myeloblastic leukemia (AML). The objective of this randomized study was to evaluate the impact of mode of administration of MTZ on the response and recurrence rates in newly diagnosed patients with AML and to compare the toxicity patterns associated with bolus and continuous infusion (CI) of MTZ. From March 1987 to March 1994, 40 newly diagnosed patients with AML were randomized to receive either bolus or CI‐MTZ, administered for 3 days at 10 mg/m2/day in combination with CI‐cytarabine for 7 days at 100 mg/m2/day. Patients achieving complete remission (CR) received two consolidation cycles followed by monthly maintenance cycles, aiming a total of 12 cycles of chemotherapy. Fifteen patients (75%) in the bolus arm and 16 patients (80%) in the CI arm achieved CR. There were no significant differences in rates of early death and time to myeloid recovery between the two groups. After 11 years from the initiation of the study, median disease‐free survival (DFS) in bolus and CI groups were 19 and 29 months after a median follow‐up of 10 and 14 months, respectively. DFS rates at 10 years were 16.7% in the bolus group and 28.6% in the CI group (p = 0.36). Overall survival (OS) rates during the same period were 10.7 and 21.3% in the bolus and CI groups, respectively (p = 0.26). No relapse was observed in either group after 4 years. In patients younger than 40 years of age, DFS and OS were found to be significantly longer in the CI arm (p = 0.02 and p = 0.03, respectively). Mild asymptomatic cardiotoxicity associated with a decrease of 10 to 20% in the ejection fraction occurred in a patient in CI‐MTZ arm and in two patients in the bolus arm. None of these patients showed any evidence of cardiac failure during their subsequent follow‐up. Grade III–IV alopecia (p = 0.05) and grade I–II hepatotoxicity (p = 0.01) were more frequent in the CI arm. A tendency for higher frequency of grade III–IV nausea was observed in the bolus arm (9 vs. 3%, p = 0.10). As a conclusion, bolus and CI administration of MTZ were equally effective and tolerated well. Development of new anti‐leukemia agents with novel treatment approaches is still needed to improve the high relapse rates in patients with AML who do not have an HLA‐matched donor. Copyright © 2004 John Wiley & Sons, Ltd.
Capital mobility and adjustment of the current account imbalances: a bounds testing approach to cointegration in 12 countries (1880‐2001)
Authors: Corbin Annie 
Published: July 2004

AbstractThe saving–investment correlation in the long run may be interpreted as an indicator of the respect of the nation's intertemporal budget constraint. In the context of the single equation method, the existence of such a long‐run relationship implies that the levels of the variables as regressors must be cointegrated. Using the new approach to cointegration developed by Pesaran et al. (2001), the paper attempts to ascertain the existence of a long‐run relationship between the domestic saving and investment rates in industrialized countries over the period 1880–2001 when it is not known if the variables under consideration are stationary in levels or in differences. Inferences are drawn concerning international capital mobility. Copyright © 2004 John Wiley & Sons, Ltd.
Estimating structural macroeconomic shocks through long‐run recursive restrictions on vector autoregressive models: the problem of identification
Authors: Taylor Mark P. 
Published: July 2004

AbstractWe demonstrate that a popular method of estimating underlying structural macroeconomic shocks and their impulse–response functions through recursive long‐run structural restrictions on a vector autoregressive representation is not uniquely identified. We show, however, that it may be possible to infer additional qualitative restrictions to achieve identification. We illustrate with two applied examples, corresponding to a simple aggregate supply–aggregate demand framework for the USA and to a stochastic Mundell–Fleming–Dornbusch framework for the USA and Japan. The second example also illustrates how over‐identifying restrictions of the underlying framework may be examined informally. Copyright © 2004 John Wiley & Sons, Ltd.
Regulation of the collagen phenotype expression of gamma‐irradiated vascular smooth muscle cells by heparan mimetics (RGTA)
Authors: Alexakis C. , Strup C. , Mestries P. , Mathé D. , Caruelle J.P. , Barritault D. , Kern P. 
Published: July 2004

AbstractRestenosis is characterized by vascular smooth muscle cell (VSMC) proliferation and accumulation of collagen III in a hypertrophic and disorganized extracellular matrix. Restenosis is prevented by antimitotic agents or irradiation but no significant progress has been made to control collagen expression deregulation. Previously, we have shown that a new family of biopolymers named RGTA (heparan mimetics elaborated by grafting on dextran of carboxylate, sulfate, and benzylamide units) stimulate in vivo tissue repair and reduce fibrosis in various models. Using VSMC in vitro (pig aortic VSMC irradiated with a 60Co source and labeled with [3H]Proline), we now show that gamma‐irradiation reduced cell survival by 50% and collagen synthesis 6‐fold with a major increase in the ratio of collagen III to collagen I biosynthesis taken as a fibrotic index. RGTA added to the cells enhanced their survival up to 80% and reduced collagen III/I ratio back to values found in normal vascular tissues. These results suggest that RGTA combined with gamma‐radiation could be an efficient strategy against restenosis. © 2004 Wiley Periodicals, Inc. J Biomed Mater Res 70A: 594–602, 2004