bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Catalytic β‐Stereospecific Epoxidation of Unsaturated Steroids by trans‐Dioxoruthenium(VI)tetramesitylporphyrin. Stereochemical Grounds for the β‐Diastereofacial Selection.
Authors: TAVARES M. , RAMASSEUL R. , MARCHON J.‐C. , BACHET B. , BRASSY C. , MORNON J.‐P. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Facile Syntheses of (S,S)‐2,3‐Diaminobutyric Acid and the Acid Containing N‐Terminal Tripeptide of Antrimycins.
Authors: NAKAMURA Y. , SHIN S. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Stereospecific Synthesis of the Enantiomers of Nicotinylalanine, a Neuroprotecting Agent.
Authors: PELLICCIARI R. , GALLO‐MEZO M. A. , NATALINI B. , AMER A. M. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Enantiospecific Synthesis of Amino Acids: Preparation of (R)‐ and (S)‐. alpha.‐Methylaspartic Acid from (S)‐Tryptophan.
Authors: CHAN C.‐O. , CRICH D. , NATARAJAN S. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Acetalation Studies. Part 9. Reaction of Sucrose and Some Related Sugars with Acetone in the Presence of Iodine; a Novel Cleavage‐ Isopropylidenation Method.
Authors: VERHART C. G. J. , CARIS B. M. G. , ZWANENBURG B. , CHITTENDEN G. J. F. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Iodonium‐Ion‐Mediated Glycosidations of Phenyl Selenoglycosides.
Authors: ZUURMOND H. M. , VAN DER KLEIN P. A. M. , VAN DER MEER P. H. , VAN DER MAREL G. A. , VAN BOOM J. H. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of N‐Acetylallosamine‐Derived Disaccharides.
Authors: MALOISEL J.‐L. , VASELLA A. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Chemo‐Enzymatic Synthesis of a Lipid‐Linked Core Trisaccharide of N‐ Linked Glycoproteins.
Authors: FLITSCH S. L. , PINCHES H. L. , TAYLOR J. P. , TURNER N. J. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Conjugate Addition of Primary Alkyl Iodide Derived Species to Electron Deficient Olefins.
Authors: BLANCHARD P. , EL KORTBI M. S. , FOURREY J.‐L. , ROBERT‐GERO M. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Photocyclization of Enamides. Part 37. Synthesis of Despyrrolo Analogues of Reserpine Demonstrating a Versatile Addition‐Elimination Reaction Strategy for the Preparation of Functionalized Reserpine Ring System.
Authors: NAITO T. , KURODA E. , MIYATA O. , NINOMIYA I. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of a Highly Unsaturated Fatty Acid Moiety of Lipo‐ Oligosaccharides Determining Host‐Specificity in Rhizobium.
Authors: VERDUYN R. , LAGAS R. M. , DREEF C. E. , VAN DER MAREL G. A. , VAN BOOM J. H. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Reaction of Coenzyme PQQ with Amino Acids. Oxidative Decarboxylation, Oxidative Dealdolation (Cα‐Cβ Fission) and Oxazolopyrroloquinoline (OPQ) Formation.
Authors: ITOH S. , MURE M. , SUZUKI A. , MURAO H. , OHSHIRO Y. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Structure of Penicillin V Benzyl Ester Sulfoxide
Authors: SHIN W. , KIM JAHEON , KIM JOOHYUN 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Structure of Concanamycin A Pentahydrate.
Authors: NAKAI H. , MATSUTANI S. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: New Stereocontrolled Approach to the Insect Sex Pheromone Serricornin.
Authors: SZURDOKI F. , NOVAK L. , BAITZ‐GACS E. , SZANTAY CS. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Chemical Phase Diagrams for the YBa2Cu3O7 Family
Authors: KAREN P. , BRAATEN O. , KJEKSHUS A. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Design, Synthesis, and Evaluation of Functional Analogues of CC‐1065 and the Duocarmycins: A Study of Structural Features Effecting DNA Binding Selectivity
Authors: BOGER D. L. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Stereochemistry of Methyl and Methoxy Substituents in Polycyclic Hydrocarbons
Authors: BRIANT C. E. , JOHNSON O. , JONES D. W. , SHAW J. D. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Cycloaddition and Cyclization Reactions of Unsaturated Sulfones in Organic Synthesis
Authors: PADWA A. , MURPHREE S. S. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Pyrido(3,2,1‐kl)phenothiazine, Quino(8,1‐bc)(1,4) benzothiazepine and Their Derivatives
Authors: CATSOULACOS P. , CATSOULACOS D. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: High‐Tc Superconductors: A Background for μSR Measurement
Authors: GOUGH C. E. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: The Impact of NMR Spectroscopy in Molecular Sieve Characterization. Part 2. Investigations of Highly Siliceous Systems
Authors: FYFE C. A. , GRONDEY H. , FENG Y. , GIES H. , KOKOTAILO G. T. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Chaotic phenomena in an oscillator controlled by DC current pulse
Authors: Inaba Naohiko , Saito Toshimichi , Mori Shinsaku 
Published: July 2007

AbstractChaos is a general term for irregular phenomena appearing in deterministic systems which can be represented by differential or difference equations, and it has been studied widely in various fields of natural science. Chaotic phenomena have long been known to occur also in nonlinear electrical circuits. The proof for the generation of chaos, however, is insufficient and circuit experiments are not satisfactory. This paper proposes a chaos generator with which chaos generation can be verified and its confirmation by circuit experiments also is possible. The circuit is constructed from a negative resistance LC oscillator and dc current pulse source. Also, when the amplitude exceeds a certain value, a current pulse of the opposite direction is added, thereby controlling the amplitude. For the analysis a mapping method is used and its Poincaré map is derived strictly as a one‐dimensional mapping having a form similar to the Logistic map. Using this map, such phenomena as period doubling bifurcation, chaos, islands and windows, that are generated in the circuit can be explained. In addition, these phenomena are confirmed experimentally.
Synthesis of single‐amplifier switched‐capacitor filters
Authors: Hayahara Etsuro , Suzuki Takao , Kadowaki Seijiro 
Published: July 2007

AbstractIn the monolithic IC switched capacitor filters (SCF) it is desirable to use as small a member of operational amplifiers (OPA) as possible to save the chip area. This paper presents a circuit configuration of single‐OPA SCF. In the synthesis, a given transfer function is realized by active RC circuits containing ideal phase inversion transformers and then the RC circuits portion is replaced by equivalent SC networks. The characteristics of the realized SCF are sensitive to element variations and its application should be limited to transfer functions of the second to third order with a relatively low Q. High‐order transfer functions may be realized with a relatively small number of OPA's by the cascade realization with this configuration and biquad sections.
Input regulation control based on periodical monitoring using call gapping control
Authors: Fukuda Akira 
Published: July 2007

AbstractThis paper considers input regulation control based on periodical monitoring using call gapping control in a finite‐capacity queueing model. Two Poisson streams arrive at a system, and one of the streams is controlled to enter the system as follows. The system is monitored at periodical epochs. Thus when the number of calls in the system at the beginning of each interval exceeds a threshold, call gapping control which adjusts the call arrival interval is activated during that interval. The state equations of this control are established both for transient and steady states, and various evaluation measures are derived. Call gapping control, no‐control, and call reject control (all low‐priority calls are rejected) are compared through numerical examples and as a result, the following points are clarified.As for the transient state, the oscillation observed in the control and traffic characteristics of the call reject scheme, can be suppressed by the introduction of call gapping control.As for the steady state: (i) call gapping control is effective because the loss probability and the mean waiting time are reduced compared with the no‐control case; (ii) the processing volume for the regulation control is reduced in the proposed control compared with call reject control, but an extraprocessing for call gapping control is needed; and (iii) the proposed control scheme becomes effective with the monitoring interval from the viewpoint of protecting high priority calls.
Identification of impulse response by use of smooth input signals
Authors: Adachi Shu‐Ichi , Ibaragi Masahiro , Sano Akira 
Published: July 2007

AbstractAmong the many identification methods of impulse response of linear discrete system, the recursive least squares method is well known because of its ease of handling and excellent convergency. This paper analyzes why the least squares estimates of an impulse response sequence degrade in convergency when one utilizes smooth input signals for identification and the number of data is finite. It also presents an effective identification method even under such a condition. The magnitude of the eigenvalue of the correlation matrix of input signal is adopted as a quantitative index of input signal smoothness and it is demonstrated that small valued eigenvalues increase the mean squares error of least squares estimate. Using the idea of eigenvalue expansion, we also present a new online identification method which truncates small eigenvalues associated with the input autocorrelation matrix. It is shown that the optimal number of eigenvalues can be theoretically determined in consideration of the tradeoff between the parameter error due to observation noise and the parameter error due to the truncation of small eigenvalues. Moreover, by recursively estimating the eigenvalues and the eigenvectors using the power method, the proposed method is generalized to a recursive estimation method to evaluate the estimate at each time instance. By also recursively updating the optimal number of eigenvalues, the proposed method is shown to have an excellent convergency through numerical examples compared to the conventional recursive least squares method.
A method of yield analysis for analog–integrated circuits using spherical surface random numbers
Authors: Jyo Yoichi , Ikeda Hiroshi , Minamoto Suemitsu , Kojima Yoshiaki 
Published: July 2007

AbstractThis paper considers the analog‐integrated circuit in which the element values are correlated with each other, with the deviations following the n‐dimensional normal distribution. A computation method for the yield is proposed. In the method, the deviation of the element value is decomposed into the magnitude and the direction by a transformation of variables. Then only the direction is simulated using the unit spherical surface random number. For each random number, the yield is calculated by the integration of the probability density in regard to the magnitude in the acceptable region determined from the design specification. The final expression for the yield is given in the form of a finite series, which is suited to the computation by a computer. The determination of the acceptable region is discussed. The statistical error in the proposed method is compared with that of the general Monte‐Carlo method, demonstrating that the yield calculation with a high accuracy can be realized by the proposed method. Various improvement techniques for the efficiency in the Monte‐Carlo method are also applicable to the proposed method, and the method is a useful means for the yield calculation in a large‐scale integrated circuit.
An identification method of nonlinear systems by volterra series
Authors: Ichikawa Satoshi , Yamamoto Masanori , Nishigawara Yasuhiro 
Published: July 2007

AbstractNumerical models whose input‐output relations are expressed by Volterra series, are used to identify nonlinear systems from observed set of inputs and outputs according to given evaluation criterion. Parameters of systems to be identified are Volterra kernels of various orders. Since these kernels are multivariable functions, considerable calculation and memory capacities are required for identification. This paper presents a method without Volterra series which are multivariable functions for identification and output estimation. Our identification method follows the report by Hsieh; the evaluation function is expressed using inner products in Hilbert space, employing operators from fixed input and the Hilbert space to which outputs belong. Next, the Volterra kernel of each order is regarded as a mapping from adjoint space, and the optimization is done for one variable function in adjoint space. The computing method is as follows: the problem in Hilbert space is replaced by a problem in a finite‐dimensional vector space by discretizing the time axis, the orthogonal vector system is obtained, and the optimization by one‐dimensional time sequence is done. Afterward, it is shown that the output estimation can be done for other inputs without obtaining Volterra kernels which are multivariable functions, by using the adjoint solution obtained as described in the foregoing, and constructing its computer algorithm.
A preemptive packet transfer scheme with virtual cells in a long packet
Authors: Watanabe Naoya , Hirano Miki , Kobayashi Masayuki , Yukimatsu Ken‐Ichi 
Published: July 2007

AbstractIn heterogeneous packet‐switching systems that handle packets of various sizes, such as short packets for voice and long packets for image or video, resource occupation by long packets causes an intolerable transfer delay of short packets. To avoid this problem, we propose a preemptive packet transfer scheme, where a long packet, composed of a number of virtual cells, can be preempted by short packets only at the end of each transferred cell. First, this paper analyzes the relationship between the transfer delay of short packets and cell size. Next, a division process for a long packet necessitated by short packet arrival is formulated. Then the amount of long packet processing and long packet transfer overhead are calculated. Finally, a design method for the proposed scheme is discussed and a packet format example for this scheme is proposed.
A fast algorithm of running fourier transform
Authors: Kamei Hiroyuki , Harada Tetsuya , Kawarada Hiroshi 
Published: July 2007

AbstractA short‐time Fourier transform can be derived by low‐pass filtering of the product of an input signal and exp(j2°ft). According to this method, called the Running Fourier Transform (RFT) in this paper, running power spectra with arbitrary center frequencies and arbitrary Q values can be obtained.This paper proposes a fast algorithm of discrete RFT (FRFT). In the FRFT, a first‐order lag system is adopted as the low‐pass filter (LPF), and by approximating the impulse response of the LPF with a step function, the amount of multiplications is reduced. The calculation of the complex exponentials is omitted by referring to a table of sin(2°k/K) (k =0, …, K).
Identification of transfer function model in consideration of III‐conditioning
Authors: Adachi Shuichi , Izumisawa Tooru , Sano Akira 
Published: July 2007

AbstractOften in the identification of the transfer function of a discrete‐time system, the least‐squares estimation does not work well if the system has a pole near z =1, even if the input signal is white sequence. This is because the output correlation function has a small decay, making the corresponding normal equation ill conditioned. This paper proposes an identification method to ameliorate the ill condition of the correlation matrix for such a system. In the proposed method, the identification model is rewritten so that the difference of the output signal is represented explicitly, providing a matrix transformation for the parameters to be identified. The method prepares, for the n‐th order system, n identification models with the highest order (L) being from 0 to (n‐1). The least‐squares estimation is performed for the identification models, and the values of the evaluation functions obtained by the estimations are compared. Then the estimation minimizing the evaluation function is adopted; L determined by the proposed method is related closely to the number of poles near z =1, which is the cause of the ill condition. This situation is examined by computer simulations.