bluuebunny/crossref_metadata_2025_split huggingface dataset:
Survival among women with borderline ovarian tumors and ovarian carcinoma
Authors: Sherman Mark E. , Mink Pamela J. , Curtis Rochelle , Cote Timothy R. , Brooks Sandra , Hartge Patricia , Devesa Susan 
Published: February 2004

AbstractBACKGROUNDSerous and mucinous ovarian tumors of low malignant potential (LMP‐S and LMP‐M, respectively) are noninvasive tumors that portend excellent survival when confined to the ovary. Comparison of the survival for women with LMP tumors staged as distant with women who have carcinoma may have important implications for diagnostic terminology and clinical management.METHODSThe authors compared relative survival rates among patients diagnosed with ovarian tumors during the period 1988–1999 (with follow‐up through 2000) by histologic type, disease stage, tumor grade (for carcinomas), and patient age, using data from the Surveillance, Epidemiology, and End Results Program.RESULTSThe overall relative survival rate at 10 years (± 1.96 standard errors) was 96.9% ± 2.3% for women with LMP‐S tumors, 30.4% ± 1.7% for women with serous carcinoma (CA‐S); 94.0% ± 3.1% for women with LMP‐M tumors, and 64.7% ± 3.4% for women with mucinous carcinoma (CA‐M). The survival rate at 10 years for women with distant‐stage LMP‐S tumors was 89.9% ± 5.3%, compared with 96.1% ± 8.6% for women with well differentiated, localized CA‐S. The survival rate for women with distant‐stage LMP‐M tumors at 5 years was 85.5% ± 9.0%, compared with 95.5% ± 3.4% for women with well differentiated, localized CA‐M (data for 10 years were limited). Mucinous ovarian neoplasms were associated with an excess of second malignancies of the digestive tract.CONCLUSIONSRelative survival among women with distant‐stage LMP tumors was not 100% and resembled the survival of women who had carcinoma exhibiting favorable prognostic features (localized stage). Future studies of women with high‐stage LMP tumors are required to clarify the pathogenesis of extraovarian lesions and their implications for management and prognosis. Cancer 2004;100:1045–52. Published 2004 by the American Cancer Society.
Parathyroid carcinoma: Evaluation and interdisciplinary management
Authors: Clayman Gary L. , Gonzalez Hernan E. , El‐Naggar Adel , Vassilopoulou‐Sellin Rena 
Published: February 2004

AbstractBACKGROUNDA review of recent reports found a distinct clinical behavior pattern in the rare clinical entity of parathyroid carcinoma, although to the authors' knowledge information on oncogenetic changes, prognostic factors, and the potential benefits of adjuvant therapy remain fragmented and scarce. In this report, a composite review of the literature and The University of Texas M. D. Anderson Cancer Center (M. D. Anderson) experience are presented using the presentation of a patient to illustrate critical issues in the evaluation and interdisciplinary management of patients who are afflicted with this disease.METHODSThe current study reflects a retrospective case review of patients who were diagnosed with parathyroid carcinoma, treated, and followed at M. D. Anderson from 1983 to 2002. To assure standardization of pathologic diagnosis as well as evaluations and interdisciplinary management, the investigators reviewed all cases using predetermined criteria within their specialties.RESULTSIt is interesting to note that M. D. Anderson data showed classic pathologic features that were not always present in all parathyroid carcinomas (at most, some features were noted in 37% of patients). Other results of interest indicated local recurrence rates that appeared lower if adjuvant radiation was applied after initial surgery, independent of the type of surgery or disease stage. In the authors' experience, 70% of patient's tumors exhibited local invasion, although their 5‐year survival rate of 85% was consistent with that reported previously, and their 10‐year survival rate was somewhat higher at 77%.CONCLUSIONSParathyroid carcinoma is a rare clinical entity that requires interdisciplinary evaluation and management. Comprehensive surgical excision of parathyroid carcinomas with verification of normalization of intraoperative parathyroid hormone levels should be sought. Cancer 2004;100:900–5. © 2004 American Cancer Society.
Development of potential anti‐cancer agents: Diazenes and derivatives
Authors: Čimbora‐Zovko Tamara , Bombek Sergeja , Košmrlj Janez , Kovačić Lidija , Polanc Slovenko , Katalinić Ana , Osmak Maja 
Published: February 2004

AbstractThe call for the discovery of more effective agents to treat cancer has become urgent. Recently, we have synthesized new compounds: diazenes. So far, we have demonstrated that several of them inhibited the growth of tumor cells, but their solubility and biological activity were relatively low. Therefore, new compounds have been synthesized to improve their solubility and biological efficacy. In the present study, we screened cytotoxicity of 26 new diazenes and their derivatives on human cervical carcinoma HeLa cells. The most active compound was tested also on human laryngeal carcinoma, breast adenocarcinoma, and glioblastoma cells, as well as on two drug‐resistant sublines derived from cervical and laryngeal carcinoma cells. Cytotoxicity of new compounds was determined using a colorimetric MTT assay. Results show that diazene SB‐681 was the most efficient one, reducing significantly survival of HeLa cells, with IC50 value of 16.3 μM. This compound applied in low doses inhibited also the growth of other cell lines tested, among which were two drug‐resistant cell lines. The observed activity could be explained by the influence of groups attached to the diazene functionality, namely 2‐chloroethylaminocarbonyl moiety and pentafluorophenyl moiety attached to the diazene nitrogen‐nitrogen double bond. Our data indicate that SB‐681 is a promising leading compound in the development of a novel class of antineoplastic agents. Drug Dev. Res. 61:95–100, 2004. © 2004 Wiley‐Liss, Inc.
An information filtering method for emergency management
Authors: Atoji Yusuke , Koiso Takashi , Nakatani Mie , Nishida Shogo 
Published: February 2004

AbstractInformation filtering is a function to select useful or interesting information for the user among a large amount of information. This function has become very important as network technology develops rapidly. This paper focuses on information filtering for emergency management. When a large‐scale disaster happens, the problem of information flood can be very serious because a great deal of information occurs in a short time and is sent to a person or an organization that is responsible for managing the situation.In this paper, we first consider features of information in emergency situations, and propose an information filtering system for emergency management. The proposed system is composed of three parts: message structuring part, causal analysis part, and information classification part. A prototype system is developed and its effectiveness is evaluated by experiments. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(1): 60–69, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10233
A guideline for the design of sinusoidal excitation equipment
Authors: Okada Yoshimoto , Ikeda Shinji , Kitamura Kazuaki 
Published: February 2004

AbstractIn recent years, sinusoidal excitation equipment, that is, a two‐phase induction motor fed by an AC and DC voltage source, has been employed in angular accelerating calibration of the angular accelerometer, the measuring device for the moment of inertia, cleaning and polishing device, and so on, as an exciter. Generally, the excitation equipment is required to have larger alternating torque. Previously, we have derived a practical equation to calculate the alternating current torque of excitation equipment. In this paper, first, for the sinusoidal excitation equipment—two‐phase induction motor fed by AC and DC voltage source—the relation among the equipment circuit parameters and the alternating torque characteristics are investigated numerically. Then, the influence of equivalent circuit parameters on the alternating torque characteristics and its tendencies are clarified. Second, a guideline for the excitation equipment design that can generate larger alternating torque are presented using the equivalent circuit parameters. Last, in order to verify the validity of the new strategy, the trial excitation equipment which is designed by various redesign conditions is compared with previous excitation equipment. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(1): 70–77, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10237
The development of generator modeling techniques for multimode oscillations and study of generator H ∞ control design method for robust control
Authors: Michigami Tsutomu , Nara Kazunori , Omata Hitoshi 
Published: February 2004

AbstractModern electric power systems of Japan are characterized by high density, wide area coverage, and a complicated structure. Multimode oscillations occur in the generators connected to the systems. These oscillations represent a combination of high‐ and low‐frequency modes that occur between individual power systems and oscillations of other types, such as the SSR and cross‐compound machine oscillations, which are characteristic mode oscillations of generators. In this paper, we first construct a real model of the generator that realizes the multimode oscillations. Next, model reduction of this real model is carried out, and a design model to be used for the control design is constructed. The H ∞ control design based on the modern control theory is presented by using this design model, which implements the damping of power system oscillations and robust stabilization of other multiple modes. In conclusion, we confirm that the target parameters of the control design have been achieved. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(1): 42–52, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10253
Stabilization control for multimachine system using decentralized H∞ excitation controller realizing terminal voltage control and damping control
Authors: Senjyu Tomonobu , Morishima Yoshiteru , Yamashita Takahiro , Uezato Katsumi , Fujita Hideki 
Published: February 2004

AbstractIn this paper, to achieve both damping of power system oscillation and terminal voltage control simultaneously on a multimachine power system, we propose a decentralized H∞ excitation controller. In the proposed method, H∞ control via the Normalized Coprime Factorization approach is used to achieve the proposed design idea. By the Normalized Coprime Factorization approach, the weighting function in H∞ control design is simplified, and output feedback controllers that take into account the realities and constraints of the power systems are designed. The proposed controller is subjected to model reduction of H∞ controllers, and is transformed to a discrete system to perform digital control by computer systems in consideration of application to a real system. We verify that the proposed excitation controller can achieve both damping of power system oscillation and terminal voltage control by computer simulations of a multimachine power system. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(1): 33–41, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10254
A study on an active noise control system using an adaptive exponential filter
Authors: Kobayashi Masaki , Itoh Yoshio 
Published: February 2004

AbstractActive noise control systems that have been studied previously require a replica of the cancellation path to obtain the updating weight values, because the signals for the operation cannot be observed. In this paper we propose a structure and an adaptive algorithm for the active noise control system using an adaptive exponential filter that does not require any replica. The adaptive algorithm is based on the steepest descent method that can be easily realized and the updating weight value of the adaptive exponential filter is the correlation of the observable output signal of the adaptive system and the estimation error. The other adaptive filters are composed of the linear transversal system. It is proven that the transfer function after converging completely corresponds to the transfer function of the noise and the cancellation path under a certain condition. Finally, the convergence performance of the estimation accuracy and the tracking performance with respect to rapid changes of the noise and the cancellation paths are verified by computer simulation. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(1): 53–59, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10256
The influence of wave front duration of impulse voltage on creeping discharges along aerial insulated wire
Authors: Nishi Toshiyuki , Hanaoka Ryoichi , Takata Shinzo , Miyamoto Toshio 
Published: February 2004

AbstractIn high‐voltage aerial distribution systems, creeping discharges progress along the cable surface from the free end of the binding wire when overvoltages caused by a lightning surge have invaded the central line of an insulated cable. Consequently, various accidents such as punch‐through breakdown, melting, or snapping of a cable, often occur at these systems. In our previous studies, it has been clarified that the lengths and aspects of creeping discharges under a 1.2/50 µ s impulse voltage condition can be markedly affected by changes in the electric field strength on the cable surface. However, lightning impulse surges which may invade the central line of a cable have various wave front durations. This will further complicate creeping discharge phenomena due to lightning.In this paper, we report the influence of the wave front duration on both the lengths and the aspects of the creeping discharges which progress on the cable on application of lightning impulse voltages. It has been shown that the behavior of negative creeping discharges reveals pronounced changes in response to the duration of the wave front of the applied voltage. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(2): 30–38, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10263
Detection of nitrogen metastable molecules by using the threshold ionization mass spectrometry
Authors: Matsuda Satoshi , Shimosato Hirotsugu , Yumoto Motoshige , Sakai Takao 
Published: February 2004

AbstractThe N2(A3Σu+) state has a rather long radiation lifetime, and its electron energy is high. Accordingly, it is expected that chemical reactions in the space where many metastable molecules are accumulated will be accelerated. Therefore, it is important to detect metastable molecules and to evaluate the number density of the molecules. With a view to detecting the N2(A3Σu+) state in nitrogen plasma, the authors used threshold ionization mass spectrometry. For that purpose a quadrupole mass spectrometer (QMS) was modified to control its electron energy for ionization. Magnitude of the QMS signal was compared with the ionization cross section of the N2(A3Σu+) state brought about by electron collision, and its number density was estimated. Using the method, it was recognized that the density of N2(A3Σu+) increased in proportion to the discharge current. It was likewise recognized that the density of the current was rapidly decreased in the vicinity of the glass wall. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(1): 17–24, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10270
Effects of magnetic field on the carrier density distribution of semiconductor power device operated in pulsed power conditions
Authors: Matsumoto Yasuhiro , Aoki Takashi , Tamura Yukihiko , Ibuka Shinji , Yasuoka Koichi , Ishii Shozo , Yura Masashi , Shimizu Naohiro 
Published: February 2004

AbstractTurn‐on characteristics of semiconductor power devices are evaluated under external magnetic field to study the effects of external magnetic field generated in a pulsed power circuit. Two pin diodes that have a basic structure of power devices are connected in parallel and driven by a pulsed voltage source. It was found the magnetic field applied to one diode in the perpendicular direction of current‐flow changed the current balance between the diodes. Besides the on‐resistance of a diode was increased under external magnetic field. The carrier‐density distribution inside of the diodes was measured by using a free carrier absorption method. The data show that the carrier‐density distribution changes from nearly the uniform one to the one‐sided one. It can be concluded that the effects of magnetic‐field have to be considered for the evaluation of switching characteristic in pulsed power operations. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(1): 10–16, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10271
Estimation of the electric parameters of thin electromagnetic shielding materials
Authors: Nagano Isamu , Yoshimura Yoshiyuki , Yagitani Satoshi , Yokomoto Hiroaki , Tosaka Toshihide , Nakayabu Toshihiro 
Published: February 2004

AbstractIt is important to know the electric parameters of the shielding material for numerical analysis. The purpose of this report is to estimate electric parameters of thin shielding materials. The electromagnetic field in the vicinity of a horizontal multilayered material with a magnetic dipole source is calculated numerically by a Sommerfeld integral. On the basis of this calculation, we develop a “shielding box” for measuring the shielding effectiveness (SE) with little error. We compare the magnetic SE measured with the shielding box with that obtained by calculation to evaluate this method. Because calculation results are in good agreement with measurement results, we confirm that we can measure magnetic SE of thin shielding materials with this system. Next, we propose a method to estimate unknown electric parameters of shielding materials by using the SE measurement system and the numerical calculation. The electric parameters are derived by iterating numerical calculations to fit the experimental results within 1‐dB error. We estimated the electric parameters of A1 (aluminum) material. Fitted results are in good agreement with the well‐known values, demonstrating the validity of the developed method. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(1): 1–9, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10273
Midterm stability evaluation of wide‐area power system using synchronized phasor measurements
Authors: Ota Yutaka , Ukai Hiroyuki , Nakamura Koichi , Fujita Hideki 
Published: February 2004

AbstractIn recent years, the PMU (Phasor Measurement Unit) has received a great deal of attention as a synchronized measurement system of power systems. Synchronized phasor angles obtained by the PMU provide valuable information for evaluating the stability of a bulk power system. The aspect of instability phenomena during midterm tends to be more complicated, and the stability analysis using the synchronized phasor measurements is effective in order to keep a complicated power system stable. This paper proposes a midterm stability evaluation method for the wide‐area power system using synchronized phasor measurements. By clustering the power system to some coherent groups, step‐out is predicted on the basis of an aggregated two‐machine equivalent power system. The midterm stability of a longitudinal power system model of Japan's 60‐Hz systems constructed by a hybrid‐type power system simulator is practically evaluated using the proposed method. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(1): 25–32, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10274
Loss calculation of induction motors considering harmonic electromagnetic field in stator and rotor
Authors: Yamazaki Katsumi 
Published: February 2004

AbstractA method of loss calculation for induction motors is proposed. The combined 3D–2D time‐stepping finite element analysis is carried out to obtain the copper loss and the time variation of the magnetic field in the motor. The iron loss is calculated approximately considering the time variation of the magnetic field direction and the minor hysteresis loops caused by the time‐harmonic fields using practical computer resources. The proposed method is applied to four types of induction motors, which are the solid rotor induction motors with/without slot and the cage induction motors with/without skew. The measured and the calculated total losses and the iron losses agree well in all cases. The differences of the loss distributions of each motor are also compared and investigated. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(2): 63–73, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10305
Architecture for high‐speed evolutionary computation
Authors: Yoshikawa Masaya , Imai Tetsuya , Kodama Tomoyuki , Yamauchi Hiroori , Terai Hidekazu 
Published: February 2004

AbstractGenetic algorithms (GA) are widely known as a general‐purpose optimization method, which can provide suboptimum solutions for various optimization problems by means of modeling genetic evolutionary processes of creatures. Several essential difficulties exist in GA, however, with regard to large amount of computation time and proper adjustment of many GA parameters. In order to overcome the difficulties of GA, this paper describes the architecture for a high‐speed evolutionary computation, which is optimized hierarchic pipelines to take generation models into consideration and can be flexible genetic operations corresponding to a given problem. Simulation results evaluating the proposed architecture are shown to achieve a speed 193 times faster on average compared to software processing. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(2): 39–52, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10308
An investigation of surge propagation characteristics on an 1100‐kV transmission line
Authors: Ametani Akihiro , Adachi Kazutoshi , Narita Tomomi 
Published: February 2004

AbstractThis paper investigates the surge propagation characteristics of an 1100‐kV transmission line based on field test results and EMTP simulations. The EMTP simulations shows that the arc horn voltage is almost the same as the phase‐wire voltage to earth, and thus the measured arc horn voltage can be regarded as the phase‐to‐earth voltage. The surge‐wave deformation after a distance greater than 2 km measured in the field test is analytically explained as due to separation of modal traveling waves, the earth‐return and the aerial modes, because the travel times of the two modes become noticeably different. A distinctive feature of the 1100‐kV line is its very small attenuation, about half that on a 500‐kV transmission line. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(2): 22–29, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10316