bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Azinyl Sulfides. Part 14. 5,12‐Di(1‐alkyl)thioquinanthrenediinium Bis‐ Salts and 1‐Alkyl‐3‐alkylthio‐1,4‐dihydro‐4‐thioxoquinolines.
Authors: MASLANKIEWICZ A. , ZIEBA 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: Synthesis and Spectral Characteristics of Naphthoylenequinazolones.
Authors: PONOMAREV I. I. , VINIGRADOVA S. V. , RUSANOV A. L. , SKURATOVA N. A. , BARASHKOV N. N. 
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: Preparation of (6R)‐ and (6S)‐(1R,4R)‐6‐Methyl‐2‐(p‐toluenesulfonyl)‐5‐ phenylmethyl‐2,5‐diazabicyclo(2.2.1)heptanes, Intermediates in a Synthesis of New Quinolones.
Authors: REMUZON P. , BOUZARD D. , DUSSY C. , JACQUET J.‐P. , MASSOUDI 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: Convenient Synthesis of 1,2,4‐Benzotrithiins (III) from Benzopentathiepin (II) with Phosphorus Ylide (I).
Authors: SATO R. , CHINO K. 
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 New Functionalized Dichlorophosphines: Precursors of Dicoordinated Phosphorus Heterocycles.
Authors: BANSAL R. K. , SHARMA D. C. , MAHNOT R. 
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: Enantioselective Catalytic Isomerization of an Unfunctionalized Achiral Alkene.
Authors: CHEN Z. , HALTERMAN R. 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: Epoxidation of Cyclic Olefins Using Dimeric Molybdenum(VI) Catalysts.
Authors: D'AMICO M. L. , RASMUSSEN K. , SISNEROS D. , MAGNUSSEN C. , WADE H. , RUSSELL J. G. , BORER L. 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: Synthesis and Conformational Analysis of GM3 Lactam, a Hydrolytically Stable Analogue of GM3 Ganglioside Lactone.
Authors: RAY A. K. , NILSSON U. , MAGNUSSON G. 
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: Preparation of Higher‐Carbon Sugars by Stereoselective Osmylation of Related Allylic Alcohols.
Authors: JAROSZ 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 Strategy for the Total Synthesis of 1α‐Hydroxyvitamin D Derivatives
Authors: TROST B. M. , DUMAS 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: Reaction of 2‐(2‐Propenyl)‐3‐chloromethyloxirane with Benzene.
Authors: AKHMEDOV M. A. , SARDAROV I. K. , AKHMEDOV I. M. , KOSTIKOV R. R. , BABAEV N. M. , SHUKYUROVA M. B. 
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: Radical Anellation Reactions of Allyl Iodomalononitriles.
Authors: CURRAN D. P. , SEONG C. 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: Oligo(9,10‐anthrylenes), Organic Compounds with Stable High‐Spin States.
Authors: BAUMGARTEN M. , MUELLER U. , BOHNEN A. , MUELLEN K. 
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 11‐Azasteroids from Aromatic Amines, Formaldehyde, and Cyclopentadiene.
Authors: GREGOIRE P. J. , MELLOR J. M. , MERRIMAN G. 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: Structure of a Modified β‐Lactam Analogue.
Authors: PAIN S. , BISWAS G. , BOSE A. , BANERJEE 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: Synthesis and Characterization of a Series of Liquid Crystal Monomers Containing a Novel Spacer Group Based on Vinylacetic Acid.
Authors: JACOBS H. A. , DAY G. M. , JACKSON W. R. , SIMON G. P. , WATSON K. G. , ZHENG 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: Nucleophilic Substitution Mechanism in 1,3,5‐Triazine Derivatives
Authors: SAVELOVA V. A. , PISKUNOVA ZH. P. , DRIZHD L. P. , TARAN N. 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: Synthesis and Transformations of Labdanoids
Authors: VLAD P. 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: The Crystal Structures of Some Chloromercury(II) Anions with Co(III) Complexes or Protonated Polyamines as Cations.
Authors: WEN H. , MILLER S. E. , HOUSE D. A. , MCKEE V. , ROBINSON W. 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.
ChemInform Abstract: Raman Spectroscopic Studies of Metal‐Metal Halide Molten Mixtures: The Mercury‐Mercury(II) Halide Systems.
Authors: VOYIATZIS G. A. , PAPATHEODOROU G. N. 
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.
Cervical cancer screening and management practices among providers in the National Breast and Cervical Cancer Early Detection Program (NBCCEDP)
Authors: Saraiya Mona , Irwin Kathleen L. , Carlin Linda , Chen Xiao , Jain Nidhi , Benard Vicki , Montano Daniel E. 
Published: July 2007

AbstractBACKGROUND.This study was conducted to describe clinicians serving women in the National Breast and Cervical Cancer Early Detection Program (NBCCEDP) with regard to demographic and practice characteristics and their usual practices in cervical cancer screening and abnormal cytology management, as well as human papillomavirus (HPV) test use.METHODS.The authors analyzed data from a nationally representative survey conducted in 2004 of providers practicing 7 specialties that commonly offer cervical cancer screening. The program providers were compared with nonprogram providers.RESULTS.Program providers were found to be significantly more likely than nonprogram providers to be midlevel providers and to serve low‐income, racial/ethnic minorities who are insured by Medicaid. In addition, they had significantly more patients with abnormal Papanicolaou tests and were more likely to offer onsite colposcopy (57% vs 40%). Program providers were less likely to use liquid‐based cytology (LBC) as their sole method for cytology. Approximately 20% of program and nonprogram providers used HPV DNA testing as an adjunct to screening cytology and two‐thirds used HPV tests to manage patients with abnormal cytology results. However, many also used HPV testing for reasons not approved by the U.S. Food and Drug Administration (FDA), such as for screening women age <30 years.CONCLUSIONS.As of mid‐2004, program providers served racially and ethnically diverse, low‐income patients who are at high risk for cervical cancer compared with nonprogram providers, as intended by this program. Because many providers offered on‐site colposcopy, used LBC, and used HPV tests for patients with abnormal cytology results, they are well equipped to reduce the risk of cervical cancer. Many program providers used the HPV test for reasons that were not approved of by the FDA or reimbursed by the NBCCEDP. The results of this survey have informed training materials for program providers, reimbursement policies for LBC and HPV tests, and interventions to discourage inappropriate HPV testing. (See editorial on pages 000–000, this issue.) Cancer 2007. Published 2007 by the American Cancer Society.
Parallel computation on multilayer cluster grids
Authors: Zarrelli R. , Petrone M. 
Published: July 2007

AbstractCluster architectures are increasingly used to solve high‐performance computing applications. To build more computational power, sets of clusters, interconnected by high‐speed networks, can be used in an elaboration to form a cluster grid. In this type of architecture, it is difficult to exploit all the internal resources of a cluster, because each one can be shielded by a firewall and is usually configured with machines where there is only one visible IP front‐end node that hides all its internal nodes from the external world. The exploitation of resources is even more complicated if we consider the general case where each internal node of a cluster can be a front‐end node of an another cluster. This type of architecture has been defined as a multilayer cluster grid. In this paper, a Parallel Virtual Machine (PVM) extension is presented which, through a middleware solution based on the H2O distributed metacomputing framework, permits the building of a parallel virtual machine in a multilayer cluster grid environment. In addition, the existing code written for PVM can be executed into this environment without modifications. Copyright © 2007 John Wiley & Sons, Ltd.
On transient behaviours of slotted CSMA protocols
Authors: Jereb L. , Marsan M. Ajmone 
Published: July 2007

AbstractCSMA protocols have been extensively studied under the assumption of an equilibrium condition. The results obtained in this manner provided useful insight for the development of packet radio and local area networks for the transmission of bursty data. The integration of isochronous and bursty traffic in the same network may, however, make the equilibrium assumption unrealistic, for example when fixed‐length frames are defined, only a portion of which is devoted to the transmission of bursty data according to a CSMA protocol. In such cases, it is necessary to study the protocol behaviours in fixed‐length time segments. This paper presents a technique for the analysis of slotted CSMA protocols in such an environment. Definitions for the transient throughput and transient average packet delay are introduced, and closed form expressions are derived for non‐persistent and 1‐persistent CSMA and CSMA/CD protocols with arbitrary distribution of the packet length. Numerical results help in the visualization of some interesting phenomena, peculiar to the CSMA operations in finite‐length intervals.
A methodological approach to BISDN signalling performance
Authors: Hou X. , Kalogeropoulos N. D. , Lekkou M. E. , Niemegeers I. G. , Venieris I. S. 
Published: July 2007

AbstractSophisticated signalling protocols are required to properly handle the complex multimedia, multiparty services supported by the forthcoming BISDN. The implementation feasibility of these protocols should be evaluated during their design phase, so that possible performance bottlenecks are identified and removed. In this paper we present a methodology for evaluating the performance of BISDN signalling systems under design. New performance parameters are introduced and their network‐dependent values are extracted through a message flow model which has the capability to describe the impact of call and bearer control separation on the signalling performance. Signalling protocols are modelled through a modular decomposition of the seven OSI layers including the service user to three submodels. The workload model is user descriptive in the sense that it does not approximate the direct input traffic required for evaluating the performance of a layer protocol; instead, through a multi‐level approach, it describes the actual implications of user signalling activity for the general signalling traffic. The signalling protocol model is derived from the global functional model of the signalling protocols and information flows using a network of queues incorporating synchronization and dependency functions. The same queueing approach is followed for the signalling transfer network which is used to define processing speed and signalling bandwidth requirements and to identify possible performance bottlenecks stemming from the realization of the related protocols.
An object‐oriented analysis of a BISDN control system with a focus on the UNI protocol object
Authors: Ouibrahim H. , Pattenier F. J. 
Published: July 2007

AbstractThe control system of a BISDN network will undoubtedly be very complex to design, implement and maintain. Its complexity has led researchers to look for ways of breaking down the problem into smaller and manageable parts. This has motivated the use of an object‐oriented approach to analyse and comprehend the BISDN control system.This paper thus presents an object‐oriented analysis (OOA) of a BISDN control system. This analysis is based on a method introduced by Coad and Yourdon and comprises five steps. All five steps, namely identifying subjects, identifying objects, identifying structures, defining attributes, and defining operations, will be worked out in detail with an emphasis on the user network interface (UNI) signalling protocol object. Four subjects, nine objects, and three structures are identified in the problem space at hand. This structuring offers a framework to analyse in detail the three aspects, data, structure and dynamic behaviour, of the UNI signalling protocol.A parallel between this approach and the well known approach used by the International Telecommunication Union (ITU) for specifying signalling protocols and contained in Recommendation I.130 is drawn.The Coad and Yourdon OOA approach applied to a BISDN control system can be used for the analysis of different aspects of such systems. This paper focuses on the UNI signalling protocol object which leads to a complete specification. Any protocol resulting from such analysis can be claimed to be object‐oriented protocol. This approach offers modularity and thus offers a way of structuring the problem space into identifiable objects and data. Full benefits of object orientation can be gained only in the consistent use of object orientation throughout all steps in the development process. The proposed approach allows one to create libraries of generic procedures which can be reused in specific implementations.
A distributed media access protocol for packet radio networks and performance analysis. Part 1: Network capacity
Authors: Pond Lawrence C. , Li Victor O. K. 
Published: July 2007

AbstractA distributed time‐slot assignment protocol is developed for a mobile multi‐hop broadcast packet radio network, using time division multiple access channel access and virtual circuit switching. The protocol eliminates the single point failure mode of centralized network management and the delays of centralized processing. It is applicable to the user‐to‐user communications functions of such systems as the U. S. Army's enhanced position location and reporting system (EPLRS). The important functions of the distributed protocol, including time‐slot assignment, virtual circuit set‐up, and network synthesis, are identified, and implementing algorithms are presented and verified. The performance analysis of the protocol is divided into two parts. In this paper, Part 1 of the performance analysis, the capacity of a network using this protocol is studied and a tool is developed to design the network capacity by trading off among the network area, the transmission range, and the number of packet radio units. Since these results are not in closed form, numerical results provide insight into these parameters. In Part 2 the network set‐up time and network data rate are analysed and a hierarchical architecture for the distributed protocol is proposed and analysed.
Analysis and design of a DPSK optical heterodyne receiver in the presence of laser phase noise and frequency detuning
Authors: Gini Fulvio , Luise Marco , Reggiannini Ruggero 
Published: July 2007

AbstractThis paper is concerned with the analysis and design of an improved differential heterodyne optical receiver for differentially‐encoded binary PSK (briefly, DPSK) signals in a coherent lightwave communication system. In the first part of the paper, we discuss the relevant design criteria to be employed when dealing with asynchronous heterodyne receivers for ASK, FSK or DPSK optical signals. In particular, we introduce a convenient definition of the signal‐to‐noise ratio at the data detector input to be assumed as the system performance measure when the non‐negligible linewidth of the transmit/receive laser sources are to be taken into account. Following this design approach, we show that by properly modifying the traditional delay‐and‐multiply DPSK receiver, i. e. by allowing the delay to be a fraction of the symbol interval, we can considerably reduce the performance degradation caused by laser phase noise. We show thus that the superior power‐efficiency of DPSK can be traded in favour of a decreased sensitivity to phase noise through a proper choice of the differential detector delay. In this respect, our results reveal that DPSK may still be competitive with other modulation formats even with non‐negligible linewidth sources. In the last part of the paper, the behaviour of the optimized DPSK, ASK and large‐deviation FSK data demodulators in the presence of a quasistationary frequency detuning of the local laser is also discussed under the same set of conditions as in the previous analysis. The results can be employed to derive accurate design requirements for the AFC loop of the receiver.
Medium access control for asynchronous traffic in the AMNET lan
Authors: Goodall D. S. , Burston A. K. 
Published: July 2007

AbstractThis paper describes a proposed medium access control (MAC) protocol for managing asynchronous traffic within the AMNET LAN. We have called the protocol the buffered access cycle (BAC) since it employs a centrally controlled access cycle in combination with an insertion buffer. The resulting mechanism allows asynchronous traffic to co‐exist with higher priority synchronous traffic, which is managed separately, and make best use of any available bandwidth. The protocol produces utilization figures superior to those of a centrally controlled access cycle scheme without an insertion buffer. Included in the paper are a description of the proposed scheme, a description of the AMNET protocol for managing synchronous traffic, and the results of various simulations.
Optimum frequency reuse in mobile telephony systems
Authors: Kazantzakis M. G. , Demestichas P. P. , Anagnostou M. E. 
Published: July 2007

AbstractThe reason whycellularmobile telephony systems exist is that they allowfrequency reuse.Dynamic allocation algorithms improve the network efficiency and the service quality. Dynamic allocation is closely related to the followinginstantaneous allocationproblem: given a number of channels (frequencies), a cell structure and the number of calls to be accommodated in each cell, find the optimum allocation of channels to cells subject to restrictions concerning the distance of cells, where the same frequency can be reused. In this paper we formulate and solve this problem by showing that it can be reduced to a 0–1 programming problem. Finally we present results, and draw subsequent conclusions.