bluuebunny/crossref_metadata_2025_split huggingface dataset:
A monitor generation method for formal monitor‐based verification considering input constraints
Authors: Kakiuchi Yosuke , Kitajima Akira , Hamaguchi Kiyoharu , Kashiwabara Toshinobu 
Published: June 2007

AbstractVarious kinds of methods have been proposed for hardware module interface verification. We focus on monitor‐based formal verification. In our approach, to verify interface specifications more comprehensively, we describe specifications of a module interface in a specification language based on regular expressions, and then behavioral models are constructed. Next, a monitor circuit is generated. This method prevents monitor circuits from involving errors because of automated monitor generation. Usually, input constraints must also be given for a design, when each module is verified one by one, because undesirable input patterns may be provided. Instead of giving input constraints, we propose a method of monitor generation including input constraints. Input constraints are extracted from specification of interfaces. Therefore, verification of individual modules becomes less difficult. We show an experimental result on formal verification of circuits compliant to the AMBA AHB bus protocol. © 2007 Wiley Periodicals, Inc. Electron Comm Jpn Pt 3, 90(12): 19–26, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecjc.20360
A control method to realize sinusoidal input and output current waveforms for matrix converters based on PWM
Authors: Sung Kyungmin , Nakakoji Hajime , Sato Yukihiko 
Published: June 2007

AbstractA matrix converter (MC) is a three‐phase AC‐to‐AC direct converter without any energy storage requirement. It is expected to be a next‐generation converter by reason of possibilities of small size and high efficiency. At present, there are some problems preventing it from being used practically. One of the problems is the distortion in the input current. The control methods proposed so far have not realized sufficient reduction of the input current harmonics compared with conventional PWM rectifiers. As a solution to these problems, many approaches have been proposed.In the present paper, an improved PWM method that can achieve both sinusoidal input and output currents simultaneously is considered. In this method, the MC is treated as a controlled voltage source viewed from the load side. On the other hand, it is treated as a controlled current source viewed from the line side. The proposed control method is based on the mathematical expression of the function of the PWM operation of MC. To improve the input current waveform, two line‐to‐line voltages of the three‐phase line are used to control the output current. The output duty ratio of the two line‐to‐line voltages is utilized to improve the input current waveform without affecting the controllability of the output current. In addition, the compensation of the variations in the line voltage and the output current are introduced. In this way, the proposed method can realize the sinusoidal input and output currents. The effectiveness of the proposed control method is confirmed by some experimental results employing a laboratory prototype. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 161(1): 66–76, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20242
Robust stabilization of multimodeling systems via guaranteed cost control theory
Authors: Mukaidani Hiroaki , Oya Hidetoshi , Xu Hua 
Published: June 2007

AbstractThis paper considers the robust stabilization of uncertain multimodeling systems. The guaranteed cost control technique is used to choose the design parameter which is included in the control gain. The ε‐independent quadratically stabilizing controller is newly proposed. It is shown that if the reduced‐order algebraic Riccati equations (AREs) have positive definite stabilizing solutions, then closed‐loop uncertain multimodeling systems with the proposed controller are quadratically stable and have a cost bound. To show the effectiveness of the proposed algorithm, a numerical example is included. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 160(4): 49– 59, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20271
Reconstructing clusters for preconditioned short‐term load forecasting
Authors: Itagaki Tadahiro , Mori Hiroyuki 
Published: June 2007

AbstractThis paper presents a new preconditioned method for short‐term load forecasting that focuses on more accurate predicted value. In recent years, the deregulated and competitive power market increases the degree of uncertainty. As a result, more sophisticated short‐term load forecasting techniques are required to deal with more complicated load behavior. To alleviate the complexity of load behavior, this paper presents a new preconditioned model. In this paper, clustering results are reconstructed to equalize the number of learning data after clustering with the Kohonen‐based neural network. That enhances a short‐term load forecasting model at each reconstructed cluster. The proposed method is successfully applied to real data of one‐step ahead daily maximum load forecasting. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 161(1): 26–33, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20300
Accurate contour control of mechatronic servo systems without parameter adjustment by use of modified input data method
Authors: Liu Peng , Nakamura Masatoshi , Goto Satoru , Kyura Nobuhiro 
Published: June 2007

AbstractThis paper describes a technique of accurate contour control by a modified input data method for industrial mechatronic servo systems with unadjusted servo parameters. Adjustment of the servo parameters in order to achieve high‐performance contour control in mechatronic servo systems is a tedious task. The modified input data method can realize satisfactory contour control performance accuracy within rather large tolerances for servo parameter errors. The effectiveness of the proposed method has been verified by simulation and experimental studies of contour control of an actual mechatronic servo system. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 160(4): 60–69, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20322
Numerical analysis of transit conduction current in an insulating liquid with added ionic electrolyte
Authors: Nakamura Iwami , Ishii Shinnosuke , Yamada Hiroshi 
Published: June 2007

AbstractWe simulated the phenomena of transit conduction in an insulating liquid with added ionic molecules such as surfactant, by using the charge‐injection model with dissociation‐recombination. When the parameters of Ci (density of injected charge) and C0 (density of created charge in the liquid) are Ci>C0 in this simulation, the waveform of current density showed an injection type with a peak, and when Ci<C0, it showed a dissociation‐recombination type. A decreasing characteristic appeared in the low electric field, maximum one in the middle field, and saturating one in the high field. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 161(1): 10– 16, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20327
Examination of the dual‐band microwave wireless access system using radio on fiber technique
Authors: Kanaoka Yasuhiro , Kashimura Satoru , Shimizu Satoru 
Published: June 2007

AbstractThe Radio on Fiber (ROF) technique has great potential in wireless communication systems. In this paper, we report on a fundamental examination of microwave wireless access systems based on Radio on Fiber. First, we designed and constructed examination systems by applying dual band (2.4 and 5 GHz) multiservice transmission systems and confirmed that there was sufficient performance through a transmission experiment. Then, application of FP‐LD (Fabry Perot Laser Diode) was considered in order to reduce the system cost, and for the most part degradation of the transmission characteristics was not observed when FP‐LD was used. Finally, a BIDI (bidirectional) module which integrated LD and PD within one package was made to further reduce costs. By measuring the transmission performance, applying the BIDI module to ROF systems was shown to be effective. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 160(4): 32–40, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20471
Real‐time spectral analysis
Authors: Nakatsuji Hideto , Omatu Sigeru 
Published: June 2007

AbstractFor signal analysis, the Fourier transform and the linear prediction methods are the main approaches. In recent years, the wavelet transform, which gives an expression in the time–frequency domain, has been attracting attention. In the wavelet transform, scale and shift operations are used to analyze regional waves in the signal. In this paper, we propose a new method for signal analysis. Instead of the wavelet, short sine waves and cosine waves which have slightly different frequencies and phases established beforehand are used. These frequencies and phases play the same role as wavelets in analyzing regional waves in the signal. However, our proposed method is different from the wavelet transform because it does not use multiresolution analysis. In conventional spectral analysis methods, all data are prepared beforehand and calculations are performed by using these data. In the proposed method, the spectrum is updated whenever new signal data come in. We show that the amount of calculation is markedly reduced and that real‐time spectral analysis can be achieved. Finally, we present an analysis of Japanese vocal sounds using the proposed method. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 161(1): 43–50, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20504
Effect of magnetic field on the behavior and sustaining characteristics of low‐current DC vacuum arc
Authors: Yanagi Kengo , Shibata Satoru , Yanagidaira Takeshi , Tsuruta Koichi 
Published: June 2007

AbstractEffects of magnetic field on duration and dynamics of low‐current DC vacuum arcs, less than 20 A, were examined. Without a magnetic field, the cathode spot moves at random on the cathode surface and the arc voltage is constant for increasing gap length up to 30 mm. In the axial magnetic field, the arc plasma was constricted and the arc voltage rose with increasing gap length. When a magnet was arranged behind the cathode, the cathode spot rotated in the opposite direction of the Lorentz force (j×B) on the edge of the cathode. On the other hand, when a magnet was arranged behind the anode, the arc column was constricted on the electrode axis and the lifetime of the arcs was extremely extended. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 161(1): 1– 9, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20555
Iron(III) Exchange Process between Hexadentate Tripodal Ligands: Models for the Ternary Complexes
Authors: Serratrice Guy , Biaso Frédéric , Pierre Jean‐Louis , Blanc Sylvie , Albrecht‐Gary Anne‐Marie 
Published: June 2007

AbstractUsing tripodal ligands as tools, the kinetics of iron removal from ferric complexes of the tripodal tris(hydroxyquinoline) ligands O‐TRENSOX and of tris(catechol) TRENCAMS was investigated. Two hexadentate heterotripodal ligands were also examined (TRENSOX2CAMS with two hydroxyquinoline and one catechol subunits and TRENSOXCAMS2 with two catechol and one hydroxyquinoline subunits) as possible models of the ternary complexes involved in the iron exchange process. The main result of this kinetic study is the pertinence of the iron complexes of the mixed ligands as models for the transient and successive ternary complexes occurring in the iron exchange, which proceeds “arm‐by‐arm” between a homotopic ligand and the iron complex of another homotopic ligand. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
New Reactivity of 4‐Amino‐3,5‐bis(pyridin‐2‐yl)‐1,2,4‐triazole: Synthesis and Structure of a Mononuclear Species, a Dinuclear Species, and a Novel Tetranuclear Nickel(II) Rectangle Box, and Magnetic Properties of the Dinuclear and Tetranuclear Complexes
Authors: Tong Ming‐Liang , Hong Chao‐Gang , Zheng Ling‐Ling , Peng Meng‐Xia , Gaita‐Arińo A. , Clemente Juan Juan Modesto 
Published: June 2007

AbstractReactions of Ni(O2CMe)2·4H2O or NiCl2·6H2O, 4‐amino‐3,5‐bis(pyridin‐2‐yl)‐1,2,4‐triazole (abpt) and NaN3 or KSCN in different molar ratios heated under reflux or hydrothermal conditions generate a mononuclear species with dimorphous phases, a dinuclear species incorporating an in situ deaminated [bpt‐H]– ligand and a tetranuclear rectangle box incorporating an unprecedented μ:η1:η2:η1 coordination mode of the deprotonated [abpt‐H]– ligand. Structural analysis reveals that a pair of [Ni2(μ1,1‐N3)(μ‐OAc)] motifs in [Ni4(abpt)2(abpt‐H)(N3)5(O2CMe)2]·5H2O (1) are bridged by two abpt and one [abpt‐H]– units into a rectangle box. [Ni2(bpt‐H)2(SCN)2(H2O)2]·2H2O (2) is a neutral centrosymmetric dinuclear NiII complex doubly bridged by abpt ligands. The complex [Ni(abpt)2(N3)2] (3) is a neutral centrosymmetric mononuclear NiII complex and crystallizes in polymorphous phases, showing an interesting example of temperature‐induced polymorphism. Variable‐temperature magnetic susceptibility measurements reveal that the ferromagnetic interaction via the (μ1,1‐N3)2(μ‐OAc) and (μ1,1‐N3)(μ1,1‐NHabpt–H)(μ‐OAc) bridges slightly dominates over the antiferromagnetic interaction via the abpt bridges, therefore indicative of an overall ferromagnetic coupling between NiII centers in 1, and a moderate antiferromagnetic interaction occurs in 2. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
A Hexadecanuclear Copper(I)–Copper(II) Mixed‐Valence Compound: Structure, Magnetic Properties, Intervalence Charge Transfer, EPR, and NMR
Authors: De Senjuti , Chowdhury Shubhamoy , Naskar Jnan P. , Drew Michael G. B. , Clérac Rodolphe , Datta Dipankar 
Published: June 2007

AbstractHexadecanuclear copper mixed‐valence complex 2 containing 10 CuII centers and 6 CuI centers was isolated with N,O donor ligands. From the X‐ray crystal structure, 2 was found to contain a centrosymmetric dimeric cation – each monomeric unit composed of eight copper centers. It displays a very broad and weak intervalence charge‐transfer band around 1100 nm at room temperature in the solid state. Variable‐temperature magnetic susceptibility measurements indicate an S = 1/2 ground state for half of 2, explicitly, each Cu8 moiety has a g value around 2.26. Complex 2 was examined by NMR spectroscopy at room temperature in solution and by EPR at low temperature; the data indicates that the valence is delocalized in 2 at room temperature but localized at low temperature. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Synthesis and Structural Characterisation of Copper(II) 15‐Metallacrown‐5 Complexes with PbII, HgII, AgI, NaI and YIII Central Metal Ions (Eur. J. Inorg. Chem. 19/2007)
Authors: Seda Sabry Hamed , Janczak Jan , Lisowski Jerzy 
Published: June 2007

AbstractThe cover picture shows the 5‐metallacrown‐5 complex, which is obtained by the self‐assembly of five copper(II) ions, five 2‐picolinehydroximate ligands (picha) and the central mercury(II) ion. The (15‐metallacrown‐5)HgII and ‐PbII complexes have been obtained in the crystalline form as pyridine adducts [HgCu5(picha)5(py)7](NO3)2 and [PbCu5(picha)5(py)6](NO3)2 (axial pyridine molecules are not shown). Unlike the analogous lanthanide(III) derivatives, which are essentially flat, the presented 15‐metallacrown‐5 system is dome‐shaped, although not as convex as the shell of the turtle Gubi (shown in the background). Gubi is the favorite pet of the daughter of one of the authors. Details are discussed in the article by J. Lisowski et al. on p. 3015 ff.
Rubromycins: Structurally Intriguing, Biologically Valuable, Synthetically Challenging Antitumour Antibiotics
Authors: Brasholz Malte , Sörgel Sebastian , Azap Cengiz , Reißig Hans‐Ulrich 
Published: June 2007

AbstractAlthough known for more than 50 years the rubromycin family still constitutes a fascinating class of antitumour antibiotics. They are characterized by a challenging molecular architecture with the central spiroketal unit as the key feature and possess highly attractive biological properties. After a short treatment of the history of their isolation, structural elucidation and biosynthesis, their biological activities will briefly be summarized. This review strongly emphasizes the synthetic efforts aimed at these complex hexacyclic spiroketals. Reactions leading to simple spiroketal model compounds are described, followed by the synthetic approaches to the fully functionalized naphthalene and isocoumarin “wings”. The coupling of these units and their transformations into more advanced spiroketals demonstrate “the state of the art” in this research field. Only Danishefsky and co‐workers have so far completed the total synthesis of a fully functionalized rubromycin derivative; however, their product heliquinomycinone (103) is still only the aglycon of the natural product heliquinomycin (7), and it was prepared as the racemic compound. All these achievements and pitfalls reveal that increased engagement of synthetic organic chemists is required to develop new methods to make rubromycins and their analogues available by a modular approach and with reasonable efficacy. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Chemistry of Epoxyquinols A, B, and C and Epoxytwinol A
Authors: Shoji Mitsuru , Hayashi Yujiro 
Published: June 2007

AbstractThe asymmetric total synthesis of epoxyquinols A, B, and C and epoxytwinol A, and computational analysis of the key biomimetic oxidative dimerization procedure are described. In the first‐generation synthesis, a HfCl4‐mediated diastereoselective Diels–Alder reaction of furan with Corey's chiral auxiliary has been developed. In the second‐generation synthesis, a chromatography‐free preparation of an iodolactone using acryloyl chloride as the dienophile in the Diels–Alder reaction of furan and a lipase‐mediated kinetic resolution of a cyclohexenol derivative have been developed. This second‐generation synthesis is suitable for large‐scale synthesis. A biomimetic cascade reaction involving oxidation, 6π‐electrocyclization, and then Diels–Alder dimerization is the key reaction in the formation of the complex heptacyclic structure of epoxyquinols A, B, and C. Epoxytwinol A is synthesized by the cascade reaction involving oxidation, 6π‐electrocyclization, and formal [4+4] cycloaddition reactions. A 2H‐pyran, generated by oxidation/6π‐electrocyclization, acts as a good diene, reacting with several dienophiles to afford polycyclic compounds in one step. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Freshwater planarians as novel organisms for genotoxicity testing: Analysis of chromosome aberrations
Authors: Lau Adriana Helena , Knakievicz Tanise , Prá Daniel , Erdtmann Bernardo 
Published: June 2007

AbstractTwo freshwater species of planarians, Girardia schubarti Marcus and G. tigrina Girard, were used for measuring chromosome aberration (CA) induction under laboratory conditions. Three genotoxicants were tested: methyl methanesulfonate (MMS), a direct‐acting genotoxicant; cyclophosphamide, a metabolism‐dependent genotoxicant; and γ‐radiation, a clastogenic agent. All three agents produced positive responses in both species. The strongest dose‐responses were detected with MMS, and, in general, G. tigrina was somewhat more sensitive to the genotoxicity of the agents than G. schubarti. This difference in sensitivity may be due to: (a) the smaller body mass of G. tigrina; (b) differences in DNA repair, which may be reflected in the marginally higher background CA frequency of G. tigrina; and/or (c) the greater number of chromosomes in G. tigrina (2N = 16) as compared with G. schubarti (2N = 8). The responses induced by γ‐radiation in the planarians were similar to or higher than those induced in cultured human lymphocytes. The CA‐planarian assay has advantages for monitoring environmental genotoxicity in natural water resources or urban and industrial wastewater since planarians are characterized by (a) a relatively low number of easily analyzable chromosomes; (b) high regenerating capacity, allowing exposure of replicating cells from different parts of the same organism to different doses; (c) easy maintenance under laboratory conditions; and (d) worldwide distribution, making them available for genotoxicity tests using either in situ or controlled laboratory exposure conditions. Environ. Mol. Mutagen., 2007. © 2007 Wiley‐Liss, Inc.
Adjunct extended‐release valproate semisodium in late life schizophrenia
Authors: Sajatovic Martha , Coconcea Nicoleta , Ignacio Rosalinda V. , Blow Frederic C. , Hays Robert W. , Cassidy Kristin A. , Meyer William J. 
Published: June 2007

AbstractObjectiveAdjunctive anticonvulsant medications may benefit some individuals with schizophrenia, however data on adjunct anticonvulsants in older adults with schizophrenia is limited. This prospective, 12‐week open label study evaluated adjunct extended‐release valproate semisodium (divalproex) in 20 older adults with schizophrenia.MethodsThe study was conducted at an academic psychiatry clinic in the mid‐western United States. Participants were self‐referred from posted advertisements or referred by clinic practitioners. Extended‐release valproate semisodium was added onto antipsychotic treatment. Individuals with active substance use disorders or active significant medical comorbidity were excluded. Primary outcome measures included the Positive and Negative Syndrome Scale (PANSS), Geriatric Depression Scale (GDS) and Global Assessment Scale (GAS). Tolerability was evaluated via patient self‐reported side effects, change from baseline in body weight and change on abnormal movement scales.ResultsPatients (mean age 61 years, range 49.8–79.2 years) had significant reductions in psychosis scores as measured by the Positive and Negative Syndrome Scale (PANSS) p < 0.01, as well as in global functioning as measured by the Global Assessment Scale (GAS) p < 0.01 and depression as measured by the Geriatric Depression Scale (GDS) p < 0.05. Mean dose of extended‐release valproate semisodium was 587.50 mg/day SD ± 247.02. Extended‐release valproate semisodium was well tolerated in this older adult population. The primary adverse effect was sedation, which appeared to be relatively dose and titration‐speed dependent. Weight change was not significant.ConclusionWhile extended‐release valproate semisodium appears efficacious and well tolerated in older adults with schizophrenia, data from larger, controlled trials is needed. Copyright © 2007 John Wiley & Sons, Ltd.