ppxscal/embedding_network huggingface dataset:
Numerical method for the wave and nonlinear diffusion equations with the homotopy perturbation method
Authors: Changbum Chun, Hossein Jafari, Yong-Il Kim
Venue: Computers Mathematics with Applications (2009)

In this paper, the homotopy perturbation method and a modified homotopy perturbation method are used for analytical treatment of the wave equation and some nonlinear diffusion equations, respectively. Some examples are given to illustrate that a suitable choice of an initial solution can lead to the exact solution, this revealing the reliability and effectiveness of the method.
An analysis of prosodic information for the recognition of dialogue acts in a multimodal corpus in Mexican Spanish
Authors: Sergio R. Coria, Luis A. Pineda
Venue: Computer Speech and Language (2009)

This paper presents empirical results of an analysis on the role of prosody in the recognition of dialogue acts and utterance mood in a practical dialogue corpus in Mexican Spanish. The work is configured as a series of machine-learning experimental conditions in which models are created by using intonational and other data as predictors and dialogue act tagging data as targets. We show that utterance mood can be predicted from intonational information, and that this mood information can then be used to recognize the dialogue act.
An explicit duality for quasi-homogeneous ideals
Authors: Jean-Pierre Jouanolou
Venue: Journal of Symbolic Computation (2009)

Given r>=n quasi-homogeneous polynomials in n variables, the existence of a certain duality is shown and made explicit in terms of generalized Morley forms. This result, that can be seen as a generalization of [Corollary 3.6.14, Jouanolou, J.-P., 1996. Resultant anisotrope, complements et applications. Electron. J. Combin. 3 (2), Research Paper 2, approx. 91 pp. (electronic), the Foata Festschrift] where this duality is proved in the case r=n, was observed by the author at the same time. We will actually closely follow the proof of the above-cited corollary in this paper.
Screen space fluid rendering with curvature flow
Authors: Wladimir J. van der Laan, Simon Green, Miguel Sainz
Venue: Proceedings of the 2009 symposium on Interactive 3D graphics and games (2009)

We present an approach for rendering the surface of a particle-based fluid that is simple to implement, has real-time performance with a configurable speed/quality trade-off, and smoothes the surface to prevent the fluid from looking "blobby" or jelly-like. The method is not based on polygonization and as such circumvents the usual grid artifacts of marching cubes. It only renders the surface where it is visible, and has inherent view-dependent level-of-detail. We use Perlin noise to add detail to the surface of the fluid. All the processing, rendering and shading steps are directly implemented on graphics hardware.
A general education curriculum on computer fundamentals: needs assessment and design
Authors: Xiu Li, Li Zheng, Fang Yang
Venue: Proceedings of the 1st ACM Summit on Computing Education in China on First ACM Summit on Computing Education in China (2008)

Tsinghua University currently offers a general education curriculum on computer fundamentals for non-computer majors. This curriculum plays an important role in helping students establishing a complete knowledge structure in computer technology and in developing students' interdisciplinary research capabilities. In the survey of needs for such a curriculum at Tsinghua university, eleven major areas' special characteristics and their latest needs for new talents were carefully analyzed. A new curriculum was designed based on the results from the survey. This new curriculum features a set of solid foundational courses, a clear organization of concepts by types and by levels, applications orientated. After two years of implementation, the new curriculum has been shown to be very effective.
Fuzzy agent-based expert system for steel making process
Authors: M.H. Fazel Zarandi, P. Ahmadpour
Venue: Expert Systems with Applications: An International Journal (2009)

In this paper, a fuzzy multi-agent system is proposed for electric arc furnace steel making processes. Each process of electric arc furnace steel making is assigned to be an agent, which works independently whilst coordinates and cooperates with other acquaintance agents. Adaptive neuro-fuzzy inference system is used to generate agents' knowledge bases. Contract net protocol is used as negotiation protocol in the proposed multi-agent system.
Research on design of computer fundamental teaching material based on SDL
Authors: Gu Yue-sheng, Zhang Bao-jian
Venue: Proceedings of the 1st ACM Summit on Computing Education in China on First ACM Summit on Computing Education in China (2008)

Higher education computer fundamental course reform faced the 21st century has already been started in an all-round way. Innovation of teaching material's design philosophy is one of important contents that can't be ignored. This paper will summarize and review the design and write philosophy of university computer fundamental teaching material leaded by the theory of Self-Directory Learning.
Maximal infinite-valued constraint languages
Authors: Manuel Bodirsky, Hubie Chen, Jan Kára, Timo von Oertzen
Venue: Theoretical Computer Science (2009)

We systematically investigate the computational complexity of constraint satisfaction problems for constraint languages over an infinite domain. In particular, we study a generalization of the well-established notion of maximal constraint languages from finite to infinite domains. If the constraint language can be defined with an @w-categorical structure, then maximal constraint languages are in one-to-one correspondence to minimal oligomorphic clones. Based on this correspondence, we derive general tractability and hardness criteria for the corresponding constraint satisfaction problems.
A multilevel analytical placement for 3D ICs
Authors: Jason Cong, Guojie Luo
Venue: Proceedings of the 2009 Asia and South Pacific Design Automation Conference (2009)

In this paper we propose a multilevel non-linear programming based 3D placement approach that minimizes a weighted sum of total wirelength and TS via number subject to area density constraints. This approach relaxes the discrete layer assignments so that they are continuous in the z-direction and the problem can be solved by an analytical global placer. A key idea is to do the overlap removal and device layer assignment simultaneously by adding a density penalty function for both area & TS via density constraints. Experimental results show that this analytical placer in a multilevel framework is effective to achieve trade-offs between wirelength and TS via number. Compared to the recently published transformation-based 3D placement method [1], we are able to achieve on average 12% shorter wirelength and 29% fewer TS via compared to their cases with best wirelength; we are also able to achieve on average 20% shorter wirelength and 50% fewer TS via number compared to their cases with best TS via numbers.
Enhancing a Sign Language Translation System with Vision-Based Features
Authors: Philippe Dreuw, Daniel Stein, Hermann Ney
Venue: Gesture-Based Human-Computer Interaction and Simulation: 7th International Gesture Workshop, GW 2007, Lisbon, Portugal, May 23-25, 2007, Revised Selected Papers (2009)

In automatic sign language translation, one of the main problems is the usage of spatial information in sign language and its proper representation and translation, e.g. the handling of spatial reference points in the signing space. Such locations are encoded at static points in signing space as spatial references for motion events.We present a new approach starting from a large vocabulary speech recognition system which is able to recognize sentences of continuous sign language speaker independently. The manual features obtained from the tracking are passed to the statistical machine translation system to improve its accuracy. On a publicly available benchmark database, we achieve a competitive recognition performance and can similarly improve the translation performance by integrating the tracking features.
Improving language models for radiology speech recognition
Authors: John M. Paulett, Curtis P. Langlotz
Venue: Journal of Biomedical Informatics (2009)

Speech recognition systems have become increasingly popular as a means to produce radiology reports, for reasons both of efficiency and of cost. However, the suboptimal recognition accuracy of these systems can affect the productivity of the radiologists creating the text reports. We analyzed a database of over two million de-identified radiology reports to determine the strongest determinants of word frequency. Our results showed that body site and imaging modality had a similar influence on the frequency of words and of three-word phrases as did the identity of the speaker. These findings suggest that the accuracy of speech recognition systems could be significantly enhanced by further tailoring their language models to body site and imaging modality, which are readily available at the time of report creation.
Baby steps: evaluation of a system to support record-keeping for parents of young children
Authors: Julie A. Kientz, Rosa I. Arriaga, Gregory D. Abowd
Venue: Proceedings of the 27th international conference on Human factors in computing systems (2009)

Parents of young children often want to keep a variety of records on their children's early years, for the purposes of preservation of memories or at the request of their pediatrician. However, time constraints, motivation, and forgetfulness may hinder their ability to keep consistent records. We developed a system, Baby Steps, which is designed to improve the record-keeping process. In this paper, we present the results of a 3-month deployment study of this technology with 8 families and their pediatricians. The study showed that when compared to a control condition, experimental design features of Baby Steps encouraged parents to more frequently collect and review records, provided higher confidence in reporting, and improved parent-pediatrician communication.
On improved scheme for digital circuit rewiring and application on further improving FPGA technology mapping
Authors: F. S. Chim, T. K. Lam, Y. L. Wu
Venue: Proceedings of the 2009 Asia and South Pacific Design Automation Conference (2009)

The digital circuit rewiring technique has been shown to be one of the most powerful logic transformation methods being able to further improve some already excellent results on many EDA problems. In this work a new hybrid rewiring approach that can enjoy advantages from both ATPG-based and graph-based rewiring is proposed. Our hybrid approach utilizes structural characteristics and ATPG technique to perform quick alternative wires identification inside circuits. Experimental results suggest that our hybrid engine is able to achieve about 50% of alternative wires coverage when compared with ATPG-based rewiring engine with 4% of runtime only. For some problems only requiring a good-enough and very quick solution, this new rewiring technique may serve as a useful alternative.
CW laser control of MMICs
Authors: J. M. Zamanillo, J. Portilla, B. Cobo, C. Navarro C. Pérez-Vega
Venue: Proceedings of the 8th conference on Simulation, modelling and optimization (2008)

The results of our research on the electro-optical control of MMICs are shown in this paper. Two different devices have been investigated: a GaAs chip monolithic amplifier at S band, and an AlGaAs chip MMIC voltage controlled oscillator at Ku. The possibilities of optical control of the amplifier are evidenced as follows: if the amplifier operates with the same biasing, the gain can be optically controlled from a condition of almost isolation, up to an active condition, which gives a range of optical control of about 15 dB and provides an improvement of the input and output matching in a range of 12dB and 6dB, respectively. The possibilities of optical control of the VCO by illumination of the PHEMT transistor are demonstrated through measurements of the oscillation output power and frequency. An optical control range of 8dB of oscillation output power and up to 400MHz of oscillation frequency has been obtained. This optical control suggests an interesting control of gain and matching for other microwave FET based active devices.
Wireless transceiver for dot matrix (WiTrix)
Authors: Azizuddin A. Aziz, Hanita Daud, SharifahZahira Syed Iedin
Venue: Proceedings of the 8th conference on Applied informatics and communications (2008)

This paper proposes a system that enables a transmitter block to transmit messages wirelessly to the dot matrix at the receiver block. Dot matrix displays are widely used in various applications for various purposes. Among them are advertising board, public service information, traffic notifications, greeting note and many more. The hardware of the system comprised of two blocks controlled by a PIC microcontroller. The 4×4 keypad gives input to the transmitter microcontroller and the Vacuum Fluorescent Display (VFD) acts as the transmitter display. The Dot Matrix is placed as the receiver display. RF hybrid transceiver pair that acts as the heart of the wireless transmission is interfaced to the microcontrollers using the encoder/decoder pair. The RF transceiver pair transmits and receives the data based on purely RF transmission. The operability of the microcontrollers and the control of the workflow of the system was developed using C programming language. This project is a potential platform for enthusiasts of electronics project to integrate the use of microcontrollers, C programming and wireless transmission and for further expansion on outdoor message display.
Determinants of customer acceptance of multi-service network: An implication for IP-based technologies
Authors: Dong Hee Shin
Venue: Information and Management (2009)

Using a modified TAM as a conceptual framework and SEM for analysis, we determined the factors influencing the adoption of Internet Protocol Television by surveying 320 consumers. The modifications involved new constructs that incorporated user-perceived control and security in the model. The perceived quality of the content and system were found to have a significant effect on perceived usefulness and perceived playfulness. In addition, perceived control was found to have a significant effect on both extrinsic and intrinsic motivation. A significant relationship was also found between consumer-perceived security and intention. Also consumers regarded price as a main driver for switching TV services. We discuss the significance of this observation in the context of the emerging trend of technology convergence and importance in acquiring customer preference and other strategies.
Performance Analysis of Multi-channel DCA MAC Protocol in Cognitive Wireless Mesh Networks
Authors: Lianfen Huang, Minghao Yu, Bin Li, Haiying Liu, Huihuang Chen
Venue: Proceedings of the 2009 WRI International Conference on Communications and Mobile Computing - Volume 02 (2009)

The spectrum resource gets scared with the development of wireless communication. Users in cognitive wireless mesh network need to switch among multi-channels to communicate. In this paper, we propose a mathematical model of multi-channel DCA protocol in cognitive wireless mesh network. This model is based on Bernoulli and M/M/K queuing model. From the validation by compare simulation with analytical result, we can see our model and analysis is simple and accurate.
Novel method of chirped fiber Bragg grating optimization for 40Gbps optical transmission
Authors: Bo Lv, Ou Xu, Shui-sheng Jian
Venue: Proceedings of the 2008 International Conference on Advanced Infocomm Technology (2008)

This paper presents a novel methodology with which the linear chirped fiber Bragg grating (CFBG) can be effectively optimized in both reflection bandwidth and group delay ripples (GDR). The parameters of specified apodization functions is designed combining with transferring matrix method (TMM) and genetic algorithm (GA) in this scheme. The simulation shows that after 200 generations, chirped fiber Bragg grating can reveal its better performance of no more than 44.13ps GDR in 40Gbps working bandwidth used for chromatic dispersion compensation. Moreover, experimental results of 500km 40Gbps optical transmission verify that this kind of fabricated CFBG is qualified for high speed dense wavelength division multiplexing (DWDM) system.
Simulation and tracking control based on neural-network strategy and sliding-mode control for underwater remotely operated vehicle
Authors: Ahmad Bagheri, Jalal Javadi Moghaddam
Venue: Neurocomputing (2009)

In recent years, remotely operated vehicles (ROVs) play an important role in various underwater operations. In many applications, ROVs will need to be capable of maneuvering to any given point, following the object and to be controllable from the surface. The Department of Mechanical Engineering of the University of Guilan designed and fabricated an ROV for underwater exploration with special application for monitoring and studying fish behavior in the Caspian Sea. In this paper, the design, dynamic modeling, and control of the fabricated ROV are presented for four degrees of freedom (DOFs). Moreover, this study uses a sliding-mode neural-network scalar (SMNNS) control system to track the control of the ROV in order to achieve a high-precision position control. In the SMNNS control system, a neural-network controller is developed to mimic an equivalent control law in the sliding-mode control, and a robust controller and also a scalar controller are designed to curb the system dynamics on the sliding surface for guaranteeing the asymptotic stability property and achieving high-accuracy position control. Moreover, to estimate the upper bound of uncertainties, an adaptive bound estimation algorithm is employed. All adaptive-learning algorithms in the SMNNS control system are derived from the sense of the Lyapunov stability analysis. It has been shown that system-tracking stability can be guaranteed in the closed-loop system irrespective of whether uncertainties occur or not. Significant improvements are observed in tracking performance of the ROV in all controllable DOFs.
A step towards a new generation of group communication systems
Authors: Sergio Mena, André Schiper, Pawel Wojciechowski
Venue: Proceedings of the ACM/IFIP/USENIX 2003 International Conference on Middleware (2003)

In this paper, we propose a new architecture for group communication middleware. Current group communication systems share some common features, despite the big differences that exist among them. We first point out these common features by describing the most representative group communication architectures implemented over the last 15 years. Then we show the features of our new architecture, which provide several advantages over the existing architectures: (1) it is less complex, (2) it defines a set of group communication abstractions that is more consistent than the abstractions usually provided, and (3) it can be made more responsive in case of failures.
Representative slice method for viscous fluid registration of three-dimensional whole-body human images
Authors: Soichiro Tokuhisa, Kunihiko Kaneko
Venue: Proceedings of the 3rd International Conference on Ubiquitous Information Management and Communication (2009)

We propose the representative slice method. This method is a parameter adjustment technique for viscous fluid registration. We experiment a whole-body CT image and whole-body MRA image registration using this method. The representative slice method is mainly consisted in three steps. In the first step, we divide whole-body image into six segments (head, chest, abdomen, hips, legs, and feet). In the second step, we select representative slices from six segments. In the last step, we regulate the viscosity for viscous fluid registration from 13 values of the viscosity. The selective viscosity is provided the well alignment in each segment's slices. In this way, the parameter regulation is performed for only the representative slices. Using this method, we can save a lot of time to regulate the viscosity and other parameters in whole-body image registration. After whole-body registration, we find some misregistered area. So we define these areas as new segments, and regulate the viscosity using the representative slice method. As a result, only 109 in 1,687 slices cannot be aligned. Thus we can register almost all whole-body CT image and MRA image, and the same time, we can also register two three-dimensional human atlas images using same displacement.
Ranked linear models and sequential patterns recognition
Authors: Leon Bobrowski
Venue: Pattern Analysis Applications (2009)

Ranked models in the form of linear transformations of multivariate feature vectors on a line can be found on the basis of a priori given order within particular pairs of objects or events. Such ranked transformations are designed to preserve given sequential order. In this way, the sequential patterns inside sets of the feature vectors can be discovered and modelled. Attention is paid here to combining problems of sequential patterns modelling and recognition with feature selection. The feature selection problem is aimed at the best representation of the sequential patterns. The convex and piecewise linear (CPL) criterion functions are used here both for designing ranked linear models and for feature selection.
Validating software requirements with enactable use case descriptions
Authors: John Mathenge Kanyaru, Keith Phalp
Venue: Requirements Engineering (2009)

Use cases have gained wide acceptance since the standardisation of the UML by the Object Management Group in 1997. This paper addresses the inadequacy of use cases for expressing intra-use case and inter-use case dependencies. We present a state-based approach for facilitating explicit consideration of such dependencies in use case descriptions, and a support tool is described, which provides enaction of the state-based use cases to support validation. We outline an industrial study involving the specification of real-time monitoring systems, wherein we demonstrate that enaction of the state-based use cases highlighted important dependency issues that had not been revealed within standard use cases.
Nonlinear magnetohydrodynamics in axisymmetric heterogeneous domains using a Fourier/finite element technique and an interior penalty method
Authors: J. -L. Guermond, R. Laguerre, J. Léorat, C. Nore
Venue: Journal of Computational Physics (2009)

The Maxwell equations in the MHD limit in heterogeneous axisymmetric domains composed of conducting and non-conducting regions are solved by using a mixed Fourier/Lagrange finite element technique. Finite elements are used in the meridian plane and Fourier modes are used in the azimuthal direction. Parallelization is made with respect to the Fourier modes. Continuity conditions across interfaces are enforced using an interior penalty technique. The performance of the method is illustrated on kinematic and full dynamo configurations.
TTTS: Turkish text-to-speech system
Authors: Zeliha Görmez, Zeynep Orhan
Venue: Proceedings of the 12th WSEAS international conference on Computers (2008)

This paper describes the TTTS (Turkish Text-To-Speech) synthesis system, developed at Fatih University for Turkish language. TTTS is a concatenative TTS system aiming to advance the process of developing natural and human sounding Turkish voices. The resulting system can be implemented by concatenating pieces of recorded speech that are stored in a database. Systems differ in the size of the stored speech units effecting the output range, the quality and the clarity. The letters of the Turkish alphabet and the syllables that consist of two letters at most are used as the smallest phonemes in the context of this study. The syllables that have more than two letters are derived from these smallest units. The results are evaluated by using the Degradation Mean Opinion Score (DMOS) method.