bluuebunny/crossref_metadata_2025_split huggingface dataset:
The TM mode in the self‐focusing dielectric planar waveguide
Authors: Lian Han‐Xiong , Stapleton Shawn 
Published: July 2007

AbstractThe TM0 guided mode in the self‐focusing dielectric planar waveguide and its universal dispersion curves are obtained by an approximation method, The single mode propagation condition of the fundamental mode TE0 in the self‐focusing planar waveguide is discussed based on the cutoff wavelengths of the higher‐order TE modes and the higher‐order TM modes. The coupling between the fundamental mode TE0 and the second mode TM0 is described by the calculation of the birefringence between the TE0 mode and the TM0 mode. It was found that the Kerr effect with α > 0 (α is a parameter which describes the film nonlinearity) causes the fields to be confined in the self‐focusing film, which results in the waveguide wavelength decreasing and the cutoff wavelength increasing as α is increased. In addition, the range of the single mode propagation is increased as α is increased. If the self‐focusing planar waveguide can support both the TE0 mode and the TM0 mode, then the coupling between the TE0 mode and the TM0 mode is very strong and can be decreased by increasing α. © 1992 John Wiley & Sons, Inc.
The characteristic impedance of the stripline and microstrip line of the elliptic cone
Authors: Yuan Naichang , Ruan Chengli , Lin Welgan 
Published: July 2007

AbstractExpressions for the characteristic impedance of the two new kinds of transmission lines—elliptic cone stripline and microstrip line, are derived. The formulas are based on the TEM or Quasi‐TEM modes assumption and the transformation of the spherical‐conal coordinate into a two‐dimensional plane and the known results for planar transmission lines. © 1992 John Wiley & Sons, Inc.
A new characterization method for few‐moded optical fibers
Authors: Hosain S. I. , Meunier J. P. 
Published: July 2007

AbstractA new simple method of characterization has been proposed for a few‐moded optical fiber from the knowledge of the cutoff wavelengths of the first few modes. The method gives firsthand information about the various parameters of interest of the fiber. © 1992 John Wiley & Sons. Inc.
Appropriate boundary conditions for applying the fem to the analysis of scattering from periodic structures embedded in a stratified medium
Authors: Pelosi G. , Freni A. , Coccioli R. 
Published: July 2007

AbstractAn appropriate set of boundary conditions which allows application of the FEM to the analysis of arbitrarily complex periodic structures embedded in a stratified medium is discussed. These allow the use of all the potentiality of the FEM without limitations as to the geometry or material properties of the scatterer. © 1992 John Wiley & Sons. Inc.
Polarimetric signatures of a layer of nonspherical discrete scatterers overlying a homogeneous half‐space based on full multiple scattering vector radiative transfer theory
Authors: Chen Zhengxiao , Tsang Leung 
Published: July 2007

AbstractComplete polarimetric signatures of a layer of random nonspherical discrete scatterers overlying a homogeneous half‐space are studied with a full multiple scattering solution of the vector radiative transfer equation. The results are compared with that of the second‐order multiple scattering solution of the vector radiative transfer equation. It is found that the multiple scattering effects generally enhance the pedestal in copolarization return, decrease the degree of polarization, affect phase difference, and also enhance the depolarization return. © 1992 John Wiley & Sons, Inc.
Quasi‐tem analysis of thick multistrip lines using an efficient iterative method
Authors: Drake Enrique , Medina Francisco , Horno Manuel 
Published: July 2007

AbstractAn efficient iterative technique—the generalized biconjugate gradient method (GBGM)—is extended to the quasi‐TEM treatment of multi‐conductor multilayered thick‐strip MIC and MMIC transmission lines. A new simple model is proposed to account for finite thickness metallizations having rectangular and trapezoidal cross sections. The convergence of the model is analyzed. Asymptotic extraction techniques are introduced to work out the spatial Green's function. © 1992 John Wiley & Sons, Inc.
Novel electrical noise source based on lightwave components
Authors: Van Brink R. F. M. Den 
Published: July 2007

AbstractA novel electrical noise source is proposed, based on lightwave components and internal shot‐noise calibration, which offers an attractive alternative to conventional 50‐Ω noise sources. This report describes the principle, and the experimental verification of various quality aspects like linearity, absolute accuracy, and impedance robustness. © 1992 John Wiley & Sons, Inc.
On the synthesis of some ring junctions for six‐port measurement applications
Authors: Dueñas‐Jiménez A. , Serrano‐Santoyo A. , Mendieta F. J. 
Published: July 2007

AbstractThe article presents a methodology to generalize the branching synthesis method for synthesizing symmetrical ring structures with transmission‐line section branches of any electrical length. The procedure is applied to a five‐port junction which, in connection with a directional coupler, forms a six‐port for measurement applications. © 1992 John Wiley & Sons, Inc.
Analysis of the coupling characteristics of a three‐guide coupler with symmetric tuning
Authors: Chang Wen‐Chung , Chuang Wei‐Ching , Wang Way‐Seen 
Published: July 2007

AbstractA novel tuning structure for the identical three‐guide coupler is proposed to obtain high power transfer efficiency without waveguide bending. The basic principles of three‐guide couplers with a symmetric tuning are analyzed by applying the exact slab theory. Based on numerical calculations, novel coupling characteristics of the tuning structure, compared with those of the identical three‐guide coupler, are demonstrated, and their possible applications are discussed. © 1992 John Wiley & Sons, Inc.
On the Green's function of the transverse scalar potential and the exact evaluation of its corresponding Sommerfeld integral
Authors: Sattler Sebastian , Russer Peter 
Published: July 2007

AbstractIn this article the Green's function of the transverse scalar potential V is studied extensively. For a grounded single‐layered substrate the analytical expressions are derived and a detailed discussion of the quadrature of the Sommerfeld integral is given. The singularity due to the surface wave is examined by means of a Taylor expansion and constitutes the correct evaluation of the integral. By separating the function into a regular and a singular part the Green's function is calculated exactly. The results are compared with the static approximation in the space domain. © 1992 John Wiley & Sons. Inc.
A beam‐propagation technique to analyze integrated photonic circuits
Authors: Tamil Lakshman S. , Yu Yi‐Sheng 
Published: July 2007

AbstractAn explicit central difference scheme to implement the beam‐propagation algorithm for analyzing pulse propagation in photonic integrated circuits is discussed. The method has been successfully applied to planar waveguides, channel waveguides, and waveguide couplers. The method shows stability even after long propagation distances and does not involve computation of fast Fourier transform at any step, contrary to the methods discussed earlier. © 1992 John Wiley & Sons, Inc.
Process‐induced lateral asymmetry of a Y junction
Authors: Jeng Jyh‐Yuan , Tsui Ching‐Long , Wang Way‐Seen 
Published: July 2007

AbstractThe influence of lateral asymmetry on the electro‐optic effect of a Ti:LiNbO3 Y‐junction waveguide for integrated optical devices is investigated. The characteristic discrepancy of a Y junction related to the photolithographic process constraint is simulated. It is found that the half‐wave voltage will increase 50% if the width of waveguide is 4 μm and the branch angle is rounded by a circular shape with a radius of about 5 μm. Also, if the Y branch has a lateral offset of 2.5 μm with respect to the central axis of the input waveguide, the extinction ratio will decay to 5 dB. © 1992 John Wiley & Sons, Inc.
Optical fuzzy logic array using shadow casting
Authors: Lin Senmao , Zhing Shuqun , Chen Caisheng , Liu Ruitang , Wu Jie 
Published: July 2007

AbstractOptical implementation of pattern fuzzy logic based on shadow casting is reported. In particular, a new spatial encoding method for fuzzy logic variables is proposed to optically realize the maximization and minimization operations needed by fuzzy logic. Experimental results are also given. © 1992 John Wiley & Sons, Inc.
Optical implementation of hopfield associative memory based on imaging system using a liquid crystal device
Authors: Zhou Changhe , Liu Liren , Wang Zhijiang , Mo Yulong 
Published: July 2007

AbstractAn imaging system with the use of a liquid crystal device for two‐dimensional optical Hopfield associative memory is described. Experimental operations for 7 × 7–pixel patterns are demonstrated. © 1992 John Wiley & Sons, Inc.
Millimeter‐wave signal generation using semiconductor diode lasers (invited paper)
Authors: Helkey R. J. , Derickson D. J. , Mar A. , Wasserbauer J. G. , Bowers J. E. 
Published: July 2007

AbstractMethods of millimeter‐wave signal generation are presented using frequency multiplication by optical comb generation, direct generation using optical oscillators, and mixing between CW optical sources. © 1993 John Wiley & sons, Inc.
High‐speed quantum‐well interferometric modulators for InP‐based photonic integrated circuits (invited paper)
Authors: Zucker J. E. 
Published: July 2007

AbstractWe discuss high‐speed waveguide modulators for optical fiber communications that employ semiconductor quantum wells, with emphasis on electrorefractive devices. The prime advantages of quantum‐well material in this application are provided by enhanced electro‐optic effects that allow ultracompact devices with low drive voltage requirements. The small size is particularly important for low‐cost monolithic integration with other components for guided‐wave photonic integrated circuits. In our devices, compactness is also key for obtaining high electrical modulation bandwidth. © 1993 John Wiley & sons, Inc.
Intermixing optical and microwave signals in GaAs microstrip circuits and its applications
Authors: Li M. G. , Lee Chi H. , Hung Hing‐Loi A. 
Published: July 2007

AbstractA novel intermixing technique which combines microwaves with ultrafast optics in GaAs MMIC is presented. This technique has many features and applications. On‐wafer phase locking of a free running microwave source to the optical pulses, displaying a high‐frequency waveform by a low‐frequency replica using sequential optical sampling and high‐sensitivity field, mapping of a GaAs microstrip circuit, is demonstrated. The electro‐optical and photoconductive mixers are compared. © 1993 John Wiley & sons, Inc.
Fabrication and performance of high‐power optically activated GaAs opening switch
Authors: Liu S. G. , Subbarao S. N. , Rosen A. , Sarnoff David , Lee C. H. 
Published: July 2007

AbstractCubic‐ and wafer‐shaped GaAs p‐i‐n diodes fabricated with ion‐implanted p/n contact layers have been operated as optically activated opening switches with high‐power output performances. © 1993 John Wiley & sons, Inc.
Microwave photonics R&D in BRAZIL (invited paper)
Authors: de Salles Alvaro Augusto A. 
Published: July 2007

AbstractSignificant research and development in the areas of microwave photonics in Brazil are presented in this paper. These include direct microwave modulation of semiconductor laser diodes, optical control of MESFETs and HEMT's as well as high speed fiber optic components. Future directions for research in this area are discussed. © 1993 John Wiley & sons, Inc.
A miniaturized frequency‐compensated six‐port junction using mhmic technology
Authors: Ghannouchi Fadhel M. , Maurin David , Cuhaci Michel , Bosisio Renato G. 
Published: July 2007

AbstractCAD of a six‐port junction using miniature hybrid microwave‐integrated circuit technology (MHMIC) is presented. Frequency compensation of the q/s points is introduced and studied. The design is suited for use in swept frequency measurements covering a relatively wide frequency band. The junction incorporates three branch‐line couplers, an edge‐line coupler, a Wilkinson power divider, and a 3‐dB attenuator. The physical dimensions of the junction are 2 m × 1.5 cm. The practical operating frequency of the six‐port junction is measured to be 6–12 GHz in spite of a 3‐dB bandwidth limitation of about 20% for the branch line couplers. Some interesting applications of MHMIC/MMIC six‐port junctions are suggested. © 1993 John Wiley & Sons, Inc.
A direct optically injection‐locked 2.6‐GHz HBT oscillator
Authors: Karakuguk M. , Li W. Q. , Freeman P. N. , East J. R. , Haddad G. I. , Bhattacharya P. K. 
Published: July 2007

AbstractMeasurements on direct optical injection locking of GaAs/Al0.2Ga0.8As heterojunction bipolar transistor oscillators at 2.65 GHz are reported. An oscillator locking range of nearly 6 MHz has been achieved. Optical tuning by dc light is also observed with a tuning range up to 5 MHz. © 1993 John Wiley & Sons, Inc.
The performance of a novel simulated corrugated surface for the reduction of radar cross section
Authors: Mathew Thomaskutty , Stephen D. Saji , Jose K. A. , Aanandan C. K. , Mohanan P. , Nair K. G. 
Published: July 2007

AbstractThe development of a new simulated corrugated surface (SCS), which eliminates specular reflection and backscattering simultaneously for TE and TM polarizations, is reported. This surface, designed for blazing at non‐Bragg angles, is suitable for the reduction of radar cross section and frequency scanning. It is also established that the behavior of the SCS is equivalent to that of three‐dimensional (3D) metallic corrugations having the same grating parameters. © 1993 John Wiley & Sons, Inc.
Transient decrease of sensory perception after thermoalgesic stimuli for quantitative sensory testing
Authors: Schestatsky Pedro , Algaba Rebeca , Pérez Daniel , Casanova‐Molla Jordi , León Lucia , Costa Joao , Valls‐Solé Josep 
Published: July 2007

AbstractTransient decrease in the excitability of a reflex circuit following its activation by appropriate stimuli is a well‐recognized phenomenon, but it is unclear how this applies to thermoalgesic stimuli during quantitative sensory testing (QST). We examined the effects induced by a thermoalgesic (conditioning) stimulus on the response to a subsequent (test) stimulus of the same characteristics. All tests were done using a Peltier thermode with a surface area of 12.5 cm2 using ramp rates of 2°C/s and variable interstimulus intervals (ISIs) ranging from 10 to 60 s. Perception was measured with an electronic visual analog scale. No changes were observed in latency of pain perception. However, latency of warm perception was significantly delayed and pain perception intensity was significantly reduced with respect to conditioning stimuli at ISIs below 60 s. Our results indicate a transient saturation of warm and heat pain perception systems after a thermoalgesic stimulus. We therefore recommend that time intervals of >1 min be used between two consecutive thermoalgesic stimuli when examining QST. Muscle Nerve, 2007
Higher‐order finite elements based on generalized eigenfunctions of the Laplacian
Authors: Šolín Pavel , Vejchodský Tomáš 
Published: July 2007

AbstractWe present a new class of higher‐order finite elements based on generalized eigenfunctions of the Laplace operator, which are suitable for both product and simplicial geometries in ℝd. Due to simultaneous orthogonality of the generalized eigenfunctions under both the H and L2 products and their almost negligible dependence on reference maps, such finite elements are an excellent choice for the discretization of second‐order elliptic problems by the hp‐FEM. Analysis is illustrated by numerical results
and comparisons with other popular higher‐order finite elements are presented. The new elements are used to compute efficiently the model of an electrostatic micromotor. Copyright © 2007 John Wiley & Sons, Ltd.
A point of view: Sharing information spawns trust, productivity, and quality
Authors: Finkelstein Marvin S. , Harrick Edward J. , Sultan Paul E. 
Published: July 2007

AbstractProduct quality improvements and new labor‐management relationships are critical variables in enhancing productivity. America's future competitive position will be directly influenced by quality orientations at all levels of the organization. Trust between labor and management is equally important; therefore, new modes of labor‐management interaction must be implemented. Both quality and trust must be earned. The achievement of each will improve our quality of life, which results from producitivity growth.
Merit pay and organizational performance: Is there an effect on the bottom line?
Authors: Kopelman Richard E. , Ravenpor Janet L. , Cayer Mo 
Published: July 2007

AbstractAlthough merit pay plans are widely advocated and extensively implemented, little rigorous evidence of effectiveness exists. Evaluating merit pay is deceptively difficult because: (1) it is necessary to parametrize and measure actual merit pay practices (as distinct from stated policies), and (2) it is necessary to obtain cross‐level organizational performance data. The present study, the first to obtain performance‐pay correlational data and objective organizational performance evidence, examined merit pay practices within 398 stores of a large retail chain. As hypothesized, the within‐store performance‐pay correlation was positively correlated with store profitability. Although the lagged effect of merit pay practices slightly exceeded the concurrent effect, the hypothesized difference was not significant. With respect to utility, had the merit pay practices of all stores matched those in the “High” performance‐pay correlation group, annual profits would have increased by roughly $30 million.
Overcoming obstacles to public‐sector improvement efforts
Authors: Wooldridge Blue 
Published: July 2007

AbstractIt has been suggested that implementation is a very large part of most public policy problems—in some cases 90 percent of the problem. This cause of failure of many productivity improvement efforts might be mitigated by a systematic approach to the identification of potential obstacles to successful implementation. Such an analysis would take place during the planning phase of the productivity improvement project. This article will present a replicable methodology that public managers can use in this identification process.
Survey finds low office productivity linked to staffing imbalances
Authors: Sassone Peter G. 
Published: July 2007

AbstractAccording to a series of twenty case studies on office productivity and technology in major U.S. corporations, there is a significant lack of intellectual specialization among managers and professionals. Thai is, managers and professionals devote a relatively small fraction of their work time to management‐ and professional‐level work, and a relatively large fraction of their time to support and nonproductive tasks. In addition, the study found significant staffing imbalances throughout the cases: In nearly every office, there were more managers and professionals, and fewer support workers, than were required to perform the work cost‐effectively. An analysis of this situation suggests that a typical organization could reduce its annual office payroll costs by over 15 percent by calibrating its staffing mix and increasing the intellectual specialization of its office workers. Further, the apparent failure of massive corporate investments in office technology to achieve commensurate increases in white‐collar productivity is likely due, in large measure, to reductions in the intellectual specialization of office workers resulting from myopic staffing decisions. The article concludes with advice on measuring and tracking office productivity, developing a coherent office productivity strategy, and making office staffing and technology decisions.
Action teams in the total quality process: Experience in a job shop
Authors: Blest John P. , Hunt Raymond G. , Shadle Carolyn C. 
Published: July 2007

AbstractWith increasing competition from overseas producers, it is becoming increasingly clear that the only way for high‐wage nations like the United States to succeed is by producing quality products. To boost performance, organizations must implement a total quality process by reducing their bureaucracy and giving more authority to workers. Never‐ending and all‐encompassing, the road to the implementation of quality service depends on senior management commitment, which sets a compass course for the journey, though not a specific destination. The essence of ibis commitment is dedicated support of the total quality process, which means an enlightened adherence to a participative style of management and willingness to provide the necessary training. This article presents a case study of a job shop's progress along this road.
Beyond functional excellence: Organizing for results at london life
Authors: Warren Steve , Weizer Tim 
Published: July 2007

AbstractOrganizational productivity (or revenues per employee) has long been an important factor in the financial services industry. London Life Insurance Company, a leading individual life insurer in Canada, has achieved an average rate of productivity improvement of 7.1 percent over the past five years and in 1986, the company was awarded the Canada Award for Excellence with a gold medal for productivity. But London Life recognized that to sustain and improve on such a performance level would require breakthrough thinking. This article demonstrates how the company went beyond traditional approaches to find new ways to maximize the effectiveness of its organization and, thus, improve value for policyholders.
Service quality measurement at American express traveler's cheque group
Authors: Welch James F. 
Published: July 2007

AbstractCombining fact‐based management with executive vision is necessary to fully satisfy the expectations of customers. The American Express Traveler's Cheque Group uses a quality measurement tool called the Service Tracking Report to scrutinize service from the viewpoint of the customers. They also have developed a process which applies traditionally manufacturing‐focused statistical tools to service industry quality improvement.
Managing process improvement at the cherry point naval aviation depot
Authors: Fargher John S. W. 
Published: July 2007

AbstractOrganizations that want to improve the quality of their products or services must analyze the processes that produce those goods and services, with an eye to making them more efficient and cost‐effective. This article details the process improvement efforts made at the Naval Aviation Depot in Cherry Point, North Carolina. Although those efforts generated significant benefits, managers learned that even more could be done.
Getting organizational buy‐in for benchmarking: Environmental management at weyerhaeuser
Authors: Karch Kenneth M. 
Published: July 2007

AbstractBenchmarking is a process companies use to identify and evaluate the best practices, both inside and outside their industry, intheir field of interest. The goal is to identify gaps between their performance and the benchmarks so that they can find ways to improve their performance. This article describes an early benchmarking effort in the environmental management area of the Weyerhaeuser Company.
Baxter healthcare uses its own quality award to help achieve excellence
Authors: Sanford Roy L. 
Published: July 2007

AbstractIn its quest to satisfy customers in a rapidly changing industry, Baxter Healthcare Corporation has integrated quality into its business strategy. To accelerate the move toward quality, the corporation formed the Baxter Quality Award. The award criteria help Baxter organizations understand not only what is possible but also where they presently stand. The gap between vision and reality provides the impetus for change; thus, the Baxter Quality Award serves as an internal vehicle for achieving continuous quality improvement and business excellence.