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Highly Reliable (highly + reliable)

Distribution by Scientific Domains
Information Science and Computing28%
Engineering28%

Selected Abstracts

Ultra-miniature optical fiber pressure sensor with a sleeve for catheter insertion

ELECTRONICS & COMMUNICATIONS IN JAPAN, Issue 8 2009
Masato Shimada
Abstract A diaphragm-type optical fiber pressure sensor, which has a sleeve for fiber insertion, is proposed, and the fundamental characteristics of this sensor are demonstrated. The sleeve structure is fabricated by DRIE (Deep Reactive Ion Etching). The diaphragm with a sleeve is suitable for highly reliable and easy bonding between the sleeve and the optical fiber. The light intensity change detection by the Fabry,Perot interferometer based on the pressure is increased by the improved DRIE method. The mass production method of the developed diaphragm will be useful for creating a low-cost pressure sensor. © 2009 Wiley Periodicals, Inc. Electron Comm Jpn, 92(8): 36,42, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecj.10044 [source]

Transmission network expansion planning with security constraints based on bi-level linear programming

EUROPEAN TRANSACTIONS ON ELECTRICAL POWER, Issue 3 2009
Hong Fan
Abstract In deregulated power market, multiple conflicting objectives with many constraints should be balanced in transmission planning. The primary objective is to ensure the reliable supply to the demand as economically as possible. In this paper, a new bi-level linear programming model for transmission network expansion planning (TNEP) with security constraints has been proposed. The modeling improves traditional building style by adding reliability planning into economy planning as constraints, letting optimal planning strategy be more economic and highly reliable. A hybrid algorithm which integrates improved niching genetic algorithm and prime-dual interior point method is newly proposed to solve the TNEP based on bi-level programming. The advantages of the new methodology include (1) the highest reliability planning scheme can be acquired as economically as possible; (2) new model avoids the contradictions of conflicting objectives in TNEP, and explores new ideas for TNEP modeling; (3) the proposed hybrid algorithm is able to solve bi-level programming and fully manifests the merits of two algorithms as well. Simulation results obtained from two well-known systems and comparison analysis reveal that the proposed methodology is valid. Copyright © 2008 John Wiley & Sons, Ltd. [source]

Reliable ALE middleware for RFID network applications

INTERNATIONAL JOURNAL OF NETWORK MANAGEMENT, Issue 3 2009
Nong-Kun Chen
Radio frequency identification (RFID) technology adopts the air interface to deliver the information required for object identification. The RFID system is convenient to manage and operate, and is widely encouraged by the large-scale chain industry. Additionally, electronic product code (EPC) network technology allows immediate, automatic identification and sharing of information on items in the supply chain. This work proposes an RFID service middleware with a highly reliable and efficient application-level event (ALE)-based prototype mechanism according to EPCglobal. A Student Muster Roll (SMR) application test bed is implemented in the proposed ALE-based scheme. The SMR system can be employed to manage the absentee records of students in a class, and can manage and control several operation multi-reader devices simultaneously. The proposed scheme can filter attendance accurately, eliminating the possibility of reduplication in student records. Performance evaluation results indicate that the proposed novel scheme is much more efficient and reliable than a naive ALE scheme. Copyright © 2008 John Wiley & Sons, Ltd. [source]

First-principles optical spectra of low dimensional systems

PHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 15 2005
Letizia Chiodo
Abstract Low dimensional systems, such as organic molecules, nanotubes, nanowires, have attracted great interest in the last few years, due to their possible application in nanodevices. It is therefore important to describe accurately the electronic excitations, with highly reliable and efficient ab-initio approaches. A standard technique for studying the ground-state properties is the Density Functional Theory; however when electronic excited states are involved, the many-body Green's functions theory is used for obtaining quasi-particle excitation energies and optical spectra. In this paper we will present the current status of this theoretical and computational approach, showing results for a bulk semiconductor and for two different kinds of low dimensional systems. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

Optical interface unit,Bridge to the next-generation packet network

BELL LABS TECHNICAL JOURNAL, Issue 1 2003
Jeffrey G. Anderson
The Lucent Technologies 5ESS® switch has been widely deployed to support voice over time division multiplexing (VoTDM) interfaces to service provider networks. Therefore, the integration of a new voice over packet (VoP) interface into the 5ESS switch architecture is both a complement and a natural extension to the VoTDM interfaces already supported by the 5ESS switch. A new 5ESS peripheral unit, the optical interface unit (OIU), is being developed to support a VoP and a VoTDM trunk interface on the 5ESS switch. The OIU will provide a highly reliable, cost-effective, compact, and energy-efficient solution for both VoP and VoTDM trunks on the 5ESS switch. The OIU will protect a service provider's investment in the 5ESS switch while allowing significant savings, both capital and operational, as the service provider migrates from circuit-based to packet-based voice services in their networks. © 2003 Lucent Technologies Inc. [source]

Polymer-Templated Microarrays for Highly Reliable Plaque Purification

BIOTECHNOLOGY PROGRESS, Issue 1 2006
Kyounga Na
To infect cells with a particular multiplicity of infection, it is essential to know the concentration of virus in the inoculum. Here we describe a highly reliable and controllable method for plaque purification using cell-repellent surfaces micropatterned on the substrate. Micropatterning of localized chemical or biochemical domains has the potential to become a powerful tool in controlling the seeding of cells. The cell array was reliably fabricated with micropatterned surfaces, and the number of cells in a pattern was easily controlled by the cell density in the media and micropattern size. The cell micropatterns were infected with baculoviruses to form an array of virus plaques. GFP-modified and wild-type baculoviruses were used to verify the feasibility of purifying a specific plaque. Using confocal microscopy, GFP-expressing plaques were readily selectable and removable. [source]

Progress in the Understanding of Drug,Receptor Interactions, Part,2: Experimental and Theoretical Electrostatic Moments and Interaction Energies of an Angiotensin II Receptor Antagonist (C30H30N6O3S)

CHEMISTRY - A EUROPEAN JOURNAL, Issue 24 2007
Raffaella Soave Dr.
Abstract A combined experimental and theoretical charge density study of an angiotensin II receptor antagonist (1) is presented focusing on electrostatic properties such as atomic charges, molecular electric moments up to the fourth rank and energies of the intermolecular interactions, to gain an insight into the physical nature of the drug,receptor interaction. Electrostatic properties were derived from both the experimental electron density (multipole refinement of X-ray data collected at T=17,K) and the ab initio wavefunction (single molecule and fully periodic calculations at the DFT level). The relevance of S,,,O and S,,,N intramolecular interactions on the activity of 1 is highlighted by using both the crystal and gas-phase geometries and their electrostatic nature is documented by means of QTAIM atomic charges. The derived electrostatic properties are consistent with a nearly spherical electron density distribution, characterised by an intermingling of electropositive and -negative zones rather than by a unique electrophilic region opposed to a nucleophilic area. This makes the first molecular moment scarcely significant and ill-determined, whereas the second moment is large, significant and highly reliable. A comparison between experimental and theoretical components of the third electric moment shows a few discrepancies, whereas the agreement for the fourth electric moment is excellent. The most favourable intermolecular bond is show to be an NH,,,N hydrogen bond with an energy of about 50,kJ,mol,1. Key pharmacophoric features responsible for attractive electrostatic interactions include CH,,,X hydrogen bonds. It is shown that methyl and methylene groups, known to be essential for the biological activity of the drug, provide a significant energetic contribution to the total binding energy. Dispersive interactions are important at the thiophene and at both the phenyl fragments. The experimental estimates of the electrostatic contribution to the intermolecular interaction energies of six molecular pairs, obtained by a new model proposed by Spackman, predict the correct relative electrostatic energies with no exceptions. [source]