bluuebunny/crossref_metadata_2025_split huggingface dataset:
Micromechanical modeling of the mechanical behavior of thermoplastic olefin
Authors: Ma Qiu , Tibbenham Patricia C. , Lai Xinmin , Glogovsky Todd , Su Xuming 
Published: November 2009

AbstractThe aim of this study was to investigate the mechanical behavior and to develop a micromechanical model for thermoplastic olefin (TPO). The TPO with varying ratios of polypropylene (PP)/rubber/talc were prepared in a twin‐screw extruder. The mechanical behavior was studied through a series of tensile tests at different strain rates. Considering TPO as a composite consisting of PP matrix, rubber phase, and talc phase, the effective self‐consistent method was used to predict material Young's modulus, and an averaging method was used to predict yield stress. Comparisons between predictions and experiments showed that the models capture the elastic behavior of TPO accurately. POLYM. ENG. SCI., 2010. © 2009 Society of Plastics Engineers
School mental health and prevention science in the Baltimore City schools
Authors: Weist Mark D. , Stiegler Kerri , Stephan Sharon , Cox Jennifer , Vaughan Courtney 
Published: November 2009

AbstractThis article provides background on school mental health (SMH) programs in Baltimore and efforts to integrate evidence‐based preventive interventions into the schools served by these programs. We describe the triangular model of SMH promotion, building at the base from environment and relationship enhancement, followed by universal and selective prevention, efforts taken at each of these levels, challenges experienced, and ideas for overcoming challenges. The agenda to integrate evidence‐based preventive interventions into schools offers much promise for improving valued outcomes for students and schools. This is a difficult agenda, however, with many dimensions, including program infrastructure, training, building and sustaining school administrator and staff support, and addressing competing contingencies and tendencies toward drift. Better linkage between SMH, prevention science, and implementation science is called for. © 2009 Wiley Periodicals, Inc.
Training the next generation of school professionals to be prevention scientists: The Missouri Prevention Center model
Authors: Reinke Wendy M. , Herman Keith C. , Stormont Melissa , Brooks Constance , Darney Dana 
Published: November 2009

AbstractEmpirically supported school‐based programs have been shown to reduce the present and future risk for various emotional disturbances. Unfortunately, few of these programs have been successfully transported or maintained outside the context of controlled research studies. Central to attaining this goal is the pressing need to train the next generation of school psychology faculty leaders, versed in evidence‐based practices (EBPs), who can train school personnel to deliver existing EBPs, design and develop innovative new practices, and conduct rigorous research to evaluate the effectiveness of these practices. In part to address this critical need, we developed the Missouri Prevention Center (MPC). In this article we describe the training, service, and research activities associated with MPC. The Center works toward supporting a high‐quality training program for school psychologists who will lead the nation, state, and individual school districts in overcoming barriers to using EBPs in schools. © 2009 Wiley Periodicals, Inc.
Ligth induced bleaching and absorption kinetics in highly excited InN layers
Authors: Nargelas Saulius , Aleksiejūnas Ramūnas , Jarašiūnas Kęstutis , Vengris Mikas 
Published: November 2009

AbstractWe study the carrier recombination in highly excited InN epilayers by means of femtosecond differential transmission technique. The light induced bleaching or absorption is observed by tuning the probe photon energy by 100‐200 meV above or below the bandgap. The induced absorption decays roughly twice faster than the induced bleaching at the absorption edge. We conclude that the induced absorption kinetics show dynamics of the overall excess carrier population, while the bleaching at the absorption edge is related to carrier recombination in the band tails. Lifetime τ of absorption decay is inversely dependent on the total electron density τ=B*·(n0+N) with B*=4×10–10 cm3/s, which agrees well with the results of previous measurements. High B* value cannot be attributed to band‐to‐band recombination and supports the assumption that defect‐assisted Auger is the dominant nonlinear recombination process in InN. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Field effect transistors for terahertz imaging
Authors: Knap Wojciech , Valušis Gintaras , Łusakowski Jerzy , Coquillat Dominique , Teppe Frederic , Dyakonova Nina , Nadar Salman , Karpierz Krzysztof , Bialek Marcin , Seliuta Dalius , Kašalynas Irmantas , Fatimy Abdel El 
Published: November 2009

AbstractResonant frequencies of the two‐dimensional plasma in field effect transistors (FETs) increase with the reduction of the channel dimensions and can reach the terahertz (THz) range for micrometer and sub‐micrometer channel lengths. Nonlinearity of the gated electron gas in the transistor channel can be used for the detection of THz radiation. The possibility of tuneable narrow band detection in sub‐THz and THz range, related to plasma resonances, has been demonstrated for nanometre gate length transistors at cryogenic temperatures. At room temperatures the plasma oscillations are usually strongly damped, but field effect transistors can still operate as an efficient broadband detectors in the THz range. We present an overview of experimental results on THz detection by field effect transistors made of III‐V and Si materials, The material issue is discussed and first room applications of FETs for imaging at frequencies above 1 THz are demonstrated. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Phase transitions in modified Na1/2Bi1/2TiO3‐SrTiO3 solid solutions
Authors: Birks Eriks , Dunce Marija , Antonova Maija , Sternberg Andris 
Published: November 2009

AbstractContinuous transfer from relaxor to normal ferroelectric phase transition is found in Na1/2Bi1/2TiO3‐SrTiO3‐PbTiO3 if concentration of PbTiO3 increases. The relaxor properties in NBT solid solutions are described by the power law and Vogel‐Fulcher relationship, and concentration dependence of the relevant parameters is discussed. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Optical properties of diamond like carbon and diamond like nanocomposite films
Authors: Tamulevičienė Asta , Meškinis Šarūnas , Kopustinskas Vitoldas , Tamulevičius Sigitas 
Published: November 2009

AbstractDiamond‐like carbon (DLC) films are at the top of the significant interest due to their exceptional mechanical, chemical, optical and electrical properties as well as possibility of the room temperature deposition. Particularly, optical transmittance as well as electrical conductivity of these films can be changed in very wide range by setting appropriate synthesis conditions.In the present study diamond‐like carbon and diamond like nanocomposite films were deposited by RF plasma enhanced chemical vapor deposition (PECVD) using methane, acetylene and hexamethyldisiloxane (HMDSO) precursors. Effects of the applied bias voltage during deposition were investigated. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
A theoretical analysis of topography and molecular parameters of the CFCl3···O3 complex: Linear and bifurcate halogen‐oxygen bonding interactions
Authors: de Oliveira Boaz Galdino , de Araújo Regiane de Cássia Maritan Ugulino , Leite Elisa Soares , Ramos Mozart Neves 
Published: November 2009

AbstractA theoretical analysis of linear and bifurcate halogen‐oxygen bonds is presented in this work. B3LYP/6‐311++G(d,p) and MP2/6‐311++G(d,p) calculations were used to determine the optimized geometries of intermolecular systems formed by CFCl3 and O3. Molecular properties often analyzed in hydrogen‐bonded complexes were used here to describe the interaction between chlorine (CFCl3) and oxygen (O3). The halogen‐oxygen bond in the CFCl3···O3 complex was characterized using the topological parameters derived from the quantum theory of atoms in molecules. © 2009 Wiley Periodicals, Inc. Int J Quantum Chem, 2011
An ONIOM and DFT study of water adsorption on rutile TiO2 (110) cluster
Authors: Erdogan Rezan , Fellah Mehmet Ferdi , Onal Isik 
Published: November 2009

AbstractDensity functional theory (DFT) calculations performed at ONIOM DFT B3LYP/6‐31G**‐MD/UFF level are employed to study molecular and dissociative water adsorption on rutile TiO2 (110) surface represented by partially relaxed Ti25O37 ONIOM cluster. DFT calculations indicate that dissociative water adsorption is not favorable because of high activation barrier (23.2 kcal/mol). The adsorption energy and vibration frequency of both molecularly and dissociatively adsorbed water molecule on rutile TiO2 (110) surface compare well with the values reported in the literature. © 2009 Wiley Periodicals, Inc. Int J Quantum Chem, 2011
Density functional theory study of geometry and stability of small Zrn (n = 2–10) clusters
Authors: Wang Xiao‐Qing , Jiang Zhen‐Yi , Li Jun‐Qian , He Qing‐Li , Chu San‐Yan 
Published: November 2009

AbstractGeometric structures, electronic properties, and stabilities of small Zrn and Zr (n = 2–10) clusters have been investigated using density functional theory with effective core potential LanL2DZ basis set. For both neutral and charged systems, several isomers and different multiplicities were studied to determine the lowest energy structures. Many most stable states with high symmetry were found for small Zrn clusters. The most stable structures and symmetries of Zr clusters are the same as the neutral ones except n = 4 and 7. We found that the clusters with n > 3 possess highly compact structures. The clusters are inclined to form the caged‐liked geometry containing pentagonal structures for n > 8, which is in favor of energy. From the formation energy and second‐order energy difference, we obtained that 2‐, 5‐, 7‐atoms of neutral and 4‐, 7‐atoms cationic clusters are the magic numbers. Furthermore, the highest occupied molecular orbital‐lowest unoccupied molecular orbital gaps display that the Zr3, Zr6, Zr, and Zr are more stable in chemical stability. © 2009 Wiley Periodicals, Inc. Int J Quantum Chem, 2011
Effects of different basis sets and donor‐acceptor groups on linear and second‐order nonlinear optical properties and molecular frontier orbital energies
Authors: Avci Davut , Başoğlu Adi̇l , Atalay Yusuf 
Published: November 2009

AbstractThe calculation of molecular hyperpolarizability, molecular frontier orbital energies of some donor‐acceptor oxadiazoles (5a–f, 8a–f, and 9a–f) have been investigated using ab initio methods and different basis sets. Ab initio optimizations were performed at the Hartree–Fock (HF) and density functional (Beckee‐3–Lee–Yang–Parr; B3LYP) levels of theory with 6‐31G basis set. The polarizability (<α>), anisotropy of polarizability (Δα), and ground‐state dipole moment (μ), first hyperpolarizability (β), and molecular frontier orbital (HOMO, highest occupied molecular orbital and LUMO, lowest unoccupied molecular orbital) energies of 5a–f, 8a–f, and 9a–f have been calculated at the HF and B3LYP methods with 6‐31G, 6‐31G(d), 6‐31+G(d), 6‐31++G(d,p), 6‐311G, 6‐311G(d), 6‐311+G(d), and 6‐311++G(d,p) basis sets. Also, the molecular hardness (η) and electronegativity (χ) parameters have been obtained using molecular frontier orbital energies. The <α>, Δα, μ, β, HOMO, LUMO energies, η and χ parameters have been investigated as dependence on the choice of method and basis set. The variation graphics of <α>, Δα, μ, β, η, and χ parameters using HF and B3LYP methods with different basis sets are presented. We have examined the frontier molecular orbital pictures of 5a–f, 8a–f, and 9a–f using B3LYP/6‐31++G(d,p) level. The 5a–f, 8a–f, and 9a–f display significant linear, second‐order molecular nonlinearity, and molecular parameters and provide the basis for future design of efficient nonlinear optical materials having the 1,3,4‐oxadiazole core. © 2009 Wiley Periodicals, Inc. Int J Quantum Chem, 2011
A Composition Method to Realize Self‐checking Fault Locators
Authors: Namiki Yoshihiro , Koga Yoshiaki 
Published: November 2009

AbstractA fault locator is a self‐checking functional unit which identifies a faulty module in a self‐checking system constructed with self‐checking modules (subsystems) by collecting and observing the test outputs from each module.Faulty modules are identified by observing the syndrome corresponding to the preset input code space and identifying to which module fault the input coding subspace corresponds. Since the inputs to the fault locator are given as vectors of the preset coding subspace in this case, there may not be a sufficient number of vectors to self‐test the fault locator. Thus we present a method to construct a self‐checking fault locator by using permuters for inputs to provide sufficient input vectors for self‐testing.
Reduction of Word and Minimal Phrase Candidates for Speech Recognition Based on Phoneme Recognition
Authors: Matsunaga Sho‐Ichi , Kohda Masaki 
Published: November 2009

AbstractThis paper discusses the selection of candidates in speech recognition based on the phoneme recognition. The method is based on the result of phoneme recognition for the part of speech input, for which the segmentation is performed with a high reliability. Using the information concerning the order of the phonemes or phoneme chains, and the information concerning the top and tail phonemes, the candidates are selected. Since only the part for which the segmentation can be performed with a high reliability is used, the candidate reduction has a great effect for the clearly uttered speech, and vice versa. Consequently, the method has the feature that the recognition rate is degraded less by the candidate selection.First, the proposed selection method is introduced into the word recognition. The candidate selection is applied to all words in the dictionary. A recognition experiment was performed for the cases of the word dictionary composed of 643 city names, with 100 city names uttered by 50 examinees as the input. As a result, the word candidates were reduced to 16 percent, maintaining almost the same recognition performance as in the case without candidate reduction.Next, the proposed candidate selection is introduced into the phase recognition. In the method, the location of the phoneme to be rejected is estimated in the candidate selection in the derivation of hypothesis, and based on that result, the syntax tree is back‐tracked. An experiment was performed for 235 phrases uttered by 2 examinees. As a result, the phrase candidates were reduced to 21 percent, compared with the case without candidate selection.
Optimization of Multiple Queries in Relational Database Systems
Authors: Miyao Jun'ichi , Tominaga Kazuyuki , Kikuno Tohru , Yoshida Noriyoshi 
Published: November 2009

AbstractRecently, relational database systems which allow concurrent executions have been developed on mainframes and minicomputers. In such a system, optimization of multiple queries can be performed as an extension of optimization of a single query. By unifying the common operations in the multiple queries, the computation time or the number of disk page fetches can be reduced. In this paper, the optimization of the join operations is considered, since the join operation is the most time‐consuming one in the relational database. A problem (problem JM) is formulated to minimize the number of disk page fetches by unifying the common join operations in multiple queries. The number of page fetches depends on the realization method of a single join operation. In this paper, it is assumed that the join operation follows the nested loops method [4]. This paper proposes a heuristic algorithm for problem JM, and the effectiveness of the method is evaluated by a simulation experiment.
Automatic Rule Extraction from Statistical Data and Fuzzy Tree Search
Authors: Morishima Shigeo , Harashima Hiroshi 
Published: November 2009

AbstractGenerally speaking, it is necessary to extract knowledge from an expert in a given discipline and implement this knowledge into a system when constructing an expert system. However, it is not easy to extract knowledge in such fields as medical diagnosis or pattern recognition because the inference logic depends on the experience and intuition of the expert.This paper proposes an automatic rule extraction mechanism using statistical analysis. In this system, production rules are expressed in the form of the threshold function. Because the threshold function can describe any kinds of inference logic, it is expressed easily as a linear combination of input vectors and weighting coefficients. Thus weighting coefficients can be calculated by the same method as a discriminant function. If only one threshold is defined, general Boolean logic an be expressed. Moreover, an ambiguous inference rule can be expressed when the threshold levels are multidefined and a membership function is defined at each category.Further, the Fuzzy Tree Search algorithm which combines ambiguous inference and tree search is proposed at the end of this paper. This algorithm can search and determine an optimum cluster with little calculation and good performance.In practice, a medical diagnostic system applied to psychiatry which has most ambiguous diagnostic logic, has been constructed based on this algorithm and inference rules have been extracted automatically. By this experiment, Fuzzy Tree Search is as fast as the tree search technique and has as good a performance as a full search clustering technique.
Three—Dimensional Computer Animation by Trigonometric Approximation to Aperiodic Motion
Authors: Agui Takeshi , Sugahara Koichi , Nakajima Masayuki 
Published: November 2009

AbstractIn recent years, computers have been applied widely to produce animation. There have been few tests, however, which aimed at the animation of living objects. The authors have proposed a method of composing animation by primitives based on the approximation by trigonometric functions as a means to construct animation for living objects. By applying the method, animation for the human walking motion was constructed with a satisfactory result. However, the method was limited to the periodic motion on the two‐dimensional plane, and could not cope with the requirement for the animation of complex motion. This paper aims at the application of the trigonometric approximation, and describes a method which applies Fourier expansion after providing a correction to the measured coordinate of the joint. The method was applied to various motions, and satisfactory animation was produced.
The Design and Implementation of Unix‐Based Network System Adopting X.25 Protocol
Authors: Nakajima Tatsuo , Tokoro Mario 
Published: November 2009

AbstractThis paper considers the design and implementation of a Unix‐based global network system named X25 Net: X25 Net uses X.25 protocol and has the following characteristics:

A compatible network interface with Unix 4.2 BSD is provided.
The amount of packet transmission is small.
It is not required to establish additional expensive hardware devices.

We describe the design policy, layer, implementation, and measured performance of X25 Net.
FEAL — Fast Data Encipherment Algorithm
Authors: Shimizu Akihiro , Miyaguchi Shoji 
Published: November 2009

AbstractThis paper discusses the design of the fast data encipherment algorithm (FEAL). FEAL is a conventional encipherment algorithm using the same key for enciphering and deciphering. It is a block cipher algorithm which produces 64 bit ciphertext from 64 plaintext, using a 64‐bit key. The main feature of the cipher processing in FEAL is that it is based on 8‐bit data manipulations such as addition with modulo 256, and data cycle and data transfer commands for 1‐byte. The program performance of FEAL is improved greatly compared with that of DES. The security of FEAL is based on the characteristic value representing the trace of the plaintext and ciphering key remaining in the ciphertext, as well as on the algorithm structure.
A Tomographic Image Reconstruction from Limited View Angle Projection Data
Authors: Kudo Hiroyuki , Saito Tsuneo 
Published: November 2009

AbstractThis paper discusses the tomographic reconstruction processing from the incomplete projection data with limited projection angle, based on the estimation of the missing data by extrapolation. Essentially, there is a kind of correlation, called consistency condition, among the projection data of different directions. Mathematically, it is possible to reconstruct the image by estimating the missing data from the measured data utilizing this correlation. The algorithm proposed in this paper is based on such a mathematical principle. In this kind of inverse problem, however, the measurement noise and the computational error are greatly amplified. By applying the constrained extrapolation, which combines the known information concerning the smoothness of the object image, the processing is stabilized. As a result of the simulation experiment using a model image, it was demonstrated that the proposed method is more useful and practical for this problem, from the viewpoints of the quality of the reconstructed image, the computational complexity, and the stability against the measurement noise.
A Mathematical Formula for Subjective Expression of Visual Patterns
Authors: Iijima Taizo 
Published: November 2009

AbstractIn actual image recognition, one does not always view the whole image, but often subjectively selects a certain subregion on the image to obtain some useful information. This paper clarifies theoretically the reason why such an ability possessed by humans is naturally carried out, by using a mathematical analysis regarding the fundamental properties of a visual pattern. A mathematical formula showing multilayer structures of a visual pattern is obtained by the foregoing analysis. The results obtained in this paper may contribute to elucidating the aspect of the basic process of the feature extraction from the pattern.
Effective Vectorization Techniques for Circuit Analyses on a Vector Computer
Authors: Kage Tetsuro , Shimogori Shintaro 
Published: November 2009

AbstractThis paper presents a vectorization processing method for circuit analyses using a vector computer. It had been difficult in circuit analyses to evaluate device models with an adequately long vector length, which is the most expensive task in the computation. Therefore use of a vector computer could improve the computation time only a few times. In the proposed method, the evaluation of device models is carried out at the level of a basic element and each evaluation is vectorized throughout the circuit matrix. It is shown that neither the forward nor backward substitutions can be ignored in solving a sparse matrix with the LU decomposition method. Therefore, the vectorization is applied to the whole matrix‐solving process. These algorithms are realized in a user‐defined model circuit analysis program FINAP‐VP. As a result, all the main processes of the analysis loop are vectorized with the length of the order of a hundred to ten thousand so that the analysis time for the scalar mode was improved by a factor of more than 10. This paper describes the method of vectorization of the device‐models evaluation and the circuit matrix solution (which are the main process in a circuit analysis). The results of the benchmark tests using the vector‐computer FACOM‐VP, are also described.