ppxscal/embedding_network huggingface dataset:
Active control of synchronous machine vibrations: an adaptive optimal MIMO controller
Authors: P. Granjon
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 02 (2000)

This paper deals with a new multiple input multiple output active control algorithm applied to reduce synchronous machine vibrations. Usually, this kind of algorithm has good performance on linear time-invariant, or slowly time-varying systems. The present system has been developed taking into account the presence of a linear periodically time-varying transfer function. Signals are first shown periodic with the same fundamental frequency. Next, Fourier coefficients of the signals measured by sensors are linked to the input ones thanks to a linear matrix equation. Classical least mean square minimization can then be used to find the optimal input Fourier coefficients. Finally, a simple adaptive algorithm updating these coefficients is elaborated, in order to converge to the optimal solution and to follow the disturbances fluctuations. Results on real vibration signals show good attenuation performance with one or several sensors.
Understanding Socio-Technical Environments for Acceptance of Inter-Agency Anti/Counter-Terrorism Information Sharing Systems
Authors: JinKyu Lee, H. Raghav Rao
Venue: Proceedings of the 40th Annual Hawaii International Conference on System Sciences (2007)

The present research proposes to investigate the factors that influence acceptance of interorganizational information sharing systems among Anti/Counter-Terrorism agencies. Based on social exchange theory, transaction cost economics, and traditional IT acceptance theory, the study examines the impacts of perceived information assurance of information sharing partners, organizational norm of inter-agency information sharing, existing IT infrastructure and utilization, legal/authoritative pressure for ACT information sharing, and availability of technical standards for information sharing systems on inter-organizational anti/counter terrorism information sharing systems acceptance. The study administers a survey questionnaire to emergency responders such as law enforcement personnel, intelligence agents, firefighters, emergency medical staffs, and other government employees in the anti/counter-terrorism area. Survey participants are recruited through a non-governmental terrorism research institute and information security workshops. This paper reports an exploratory study that analyzed the first batch of survey responses from various emergency management organizations at the station level (e.g., headquarter, local offices, base, hospital, etc.). In the paper, a revised model with preliminary test results is presented, and findings are discusses for follow-up studies.
A 2.5Gbps Quad CMOS Transceiver Cell Using Regulated Supply Low Jitter PLL
Authors: Vijay Khawshe, Pravin V. Kumar, Renu Rangnekar, Kapil Vyas, Kashi Prabu, Mahabaleshwara, Manish Jain, Navin Mishra, Abhijit Abhyankar
Venue: Proceedings of the 20th International Conference on VLSI Design held jointly with 6th International Conference: Embedded Systems (2007)

A 2.5 Gbps serial link is fabricated in TSMC 90nm process. The link is targeted to support various serial link standards. To maintain a constant transmit swing the link supports automatic calibration for the on die termination (ODT) and bias, which supplies the driver. The self biased [1] regulated PLL dual loop architecture based on [2] is used which minimizes the clock jitter. A replica compensated regulator [3] is used in the PLL which cancels both the high frequency and low frequency components of the noise without affecting the PLL loop stability. A clock and data recovery circuits based on 2x over sampling [4] is implemented inside each individual lane of the serial link. The cell consumes 350mW at 2.5Gbps with transmitted jitter of 44.5ps pk-pk.
Harnessing user-level networking architectures for distributed object computing over high-speed networks
Authors: Rajesh S. Madukkarumukumana, Calton Pu, Hemal V. Shah
Venue: Proceedings of the 2nd conference on USENIX Windows NT Symposium - Volume 2 (1998)

In a distributed object system such as Distributed Component Object Model (DCOM) [5, 7], legacy transport protocols used for communication limit the performance over high-speed networks. By making use of a low-latency, high-bandwidth, and low overhead user-level networking architecture such as Virtual Interface (VI) Architecture [8, 18], this performance bottleneck can be significantly reduced. Since user-level networking architectures provide low-level primitives, the challenge lies in integrating them into high-level applications. This requires a systematic approach. In this paper, a methodology to utilize VI Architecture to improve the performance of DCOM using custom object marshaling is developed. Initial experimental results demonstrate that the latencies of small messages in distributed object computing can be significantly reduced by this methodology.
Fault-tolerant scheduling for differentiated classes of tasks with low replication cost in computational grids
Authors: Qin Zheng, Bharadwaj Veeravalli, Chen-Khong Tham
Venue: Proceedings of the 16th international symposium on High performance distributed computing (2007)

Fault-tolerant scheduling is an imperative step for large-scale computational Grid systems, as often geographically distributed nodes co-operate to execute a task. By and large, the primary-backup approach is a common methodology used for fault tolerance where in each task has a primary copy and a backup copy on two different processors. Backup overloading has been proposed to reduce replication cost by allowing the backup copy to overload with other backup copies on the same processor. In this paper, we consider two classes of independent tasks where in both the classes have fault-tolerance requirements. Furthermore, Class 1 tasks require the response time to be as short as possible when a fault occurs, while Class 2 tasks prefer backups with minimum replication cost. We propose two algorithms, called the MRC-ECT algorithm and the MCT-LRC algorithm. Algorithm MRC-ECT is shown to guarantee an optimal backup schedule in terms of replication cost, while MCT-LRCcan schedule a backup with minimum completion time and low replication cost. We conduct extensive simulation experiments to quantify the performance of the proposed algorithms.
Comparing WiMAX and HSPA: a guide to the technology
Authors: N. Johnston, H. Aghvami
Venue: BT Technology Journal (2007)

Intel has referred to WiMAX as `the most important thing since the Internet itself'. So is this true and if so what is so special about WiMAX? This paper provides a basic overview of WiMAX in terms of what it is and how it works, its throughput, coverage and security features as well as the services it could support. The paper also looks at high-speed packet access, another broadband wireless access technology, and compares it with WiMAX.
Fast Forward-an adventure in engineering for 7th and 8th grade girls
Authors: P. J. Cornwell, D. Stienstra, S. Smith
Venue: Proceedings of the Frontiers in Education Conference, on 1995. Proceedings., 1995 - Volume 02 (1995)

Fast Forward is an exciting program that has been developed at Rose-Hulman Institute of Technology to address the problems of the disproportionately high number of girls who lose interest in science during middle school and the low number of women who enroll in college prep science and math courses in high school. Fast Forward is an intensive four day immersion into the world of science and technology. Thirty young women attended the pilot program during the summer of 1994. The program included exciting and educational technical sessions in which the primary pedagogical technique was active learning. There were hands on chemistry and physics experiences and in several sessions the students used computers as a tool to solve problems. The cornerstone of Fast Forward was a project that required the young women to design, construct and test a solar powered vehicle. The student response from the pilot program was overwhelmingly positive. The details of the program, the program content, and the results of the assessment are presented.
The cognitive processes of abstraction and formal inferences
Authors: Yingxu Wang
Venue: Proceedings of the Fourth IEEE International Conference on Cognitive Informatics (2005)

Theoretical research is predominately an inductive process; while applied research is mainly a deductive process. Both inference processes are based on the cognitive process and means of abstraction. This paper describes the cognitive processes of abstraction and formal inferences such as deduction, induction, abduction, and analogy. The hierarchy of abstraction and the descriptivity of abstract means at different levels are analyzed. A set of mathematical models of formal inference methodologies are developed. Formal descriptions of the five cognitive processes of abstraction and inferences are presented using real-time process algebra (RTPA). Applications of abstraction and formal inferences in dealing with complicated problems in large-scale software system development in software engineering are discussed.
Editing Soft Shadows in a Digital Photograph
Authors: Ankit Mohan, Jack Tumblin, Prasun Choudhury
Venue: IEEE Computer Graphics and Applications (2007)

This technique for modeling, editing, and rendering shadow edges in a photograph or a synthetic image lets users separate the shadow from the rest of the image and make arbitrary adjustments to its position, sharpness, and intensity.
On The Eigenvalues of the Spectral Second Order Differentiation Operator and Application to the Boundary Observability of the Wave Equation
Authors: T. Z. Boulmezaoud, J. M. Urquiza
Venue: Journal of Scientific Computing (2007)

The behaviour of the eigenvalues of the spectral second-order differentiation operator is studied and the results are used to investigate the boundary observability of the one dimensional wave equation approximated with a spectral Galerkin method. New explicit estimates of the discrete eigenvalues are given. These estimates improve the previous results on the subject especially for the portion of eigenvalues converging exponentially to those of the continuous problem. Although the boundary observability property of the discretized wave equation is not uniform with respect to the discretization parameter, we show that a uniform observability estimate can be obtained by filtering out the highest eigenmodes.
Interactive CBIR using RBF-based relevance feedback for WT/VQ coded images
Authors: P. Muneesawang
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2001. on IEEE International Conference - Volume 03 (2001)

Powerful interfaces provide great potential for retrieval systems to adapt to dynamic user needs and allow a more accurate modeling of image similarity from the users' point of view. We propose a novel method within the interactive framework. It allows the users to directly modify the system characteristics by specifying their desired image attributes in the form of training samples. More specifically, we have adopted a radial basis function (RBF) method for implementing an adaptive metric which progressively models the notion of image similarity through continual feedback from the users. The proposed approach has been integrated into an image retrieval system using images compressed by wavelet transform and vector quantization coders. Comparisons with some of the recent systems using the standard texture database indicate that the proposed method provides the more favorable retrieval result.
Fast communication: A Prony-like method for non-uniform sampling
Authors: Loredana Coluccio, Alfredo Eisinberg, Giuseppe Fedele
Venue: Signal Processing (2007)

In this paper a Prony-like method for non-uniform sampling is proposed. The unknown parameters are estimated on the base of a new linear regression equation which uses filtered signals obtained directly from the measurements. The approach uses the derivative method in the frequency domain yielding exact formula in terms of multiple integrals of the signal, when placed in the time domain. These integrals are explicitly solved by projecting signal on some set of orthogonal basis functions or, more in general, by using a polynomial that fits data in the least-squares sense. The effectiveness of the proposed approach is shown by simulated experiments.
Estimation of rigid body motion and scene structure from image sequences using a novel epipolar transform
Authors: E. Steinbach
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 04 (1996)

Model-based video communication systems attempt to extract information about the three-dimensional structure of the scene to be transmitted. The relative motion between camera and objects can be a powerful depth cue, if the objects are rigid or almost rigid. We present a new algorithm for estimation of rigid body motion parameters and scene structure from monocular image sequences. A novel epipolar image transform is utilized to preserve the relevant information from mean squared displaced frame difference (DFD) surfaces and thus overcomes the inherent limitations of feature correspondence methods. Our algorithm conducts a coarse-to-fine search in 5-dimensional parameter space. Relative depth values are computed for each measurement window. Experimental results are presented to demonstrate the performance of the new algorithm.
A novel error measure for the evaluation of video indexing systems
Authors: S. Eickeler
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 04 (2000)

Error evaluation of video indexing systems is a problem for which no satisfactory solution has been presented so far. This paper introduces a new error measure for evaluating the results of video indexing systems. The measure compares the scene and shot boundaries of the correct index of a video sequence with the automatically created index, and decides dependent on predefined penalties whether a scene boundary is falsely detected, undetected or correctly detected. Based on this decision the measure calculates the error rates for the segmentation capability of the indexing system. Then the algorithm extends the reference and the test index by the falsely detected and undetected boundaries and compares the content classes of the resulting indexes to determine the classification error rate. The presented measure is compared to two existing measures, and the pros and cons of each measure are listed.
Progressive classification in the compressed domain for large EOS satellite databases
Authors: V. Castelli
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 04 (1996)

We introduce a new framework for classifying large images (in the EOS; Earth Observing System) that is more accurate and less computationally expensive than the classical pixel-by-pixel approach. This approach, called progressive classification, is well suited for analyzing large images, such as multispectral satellite scenes, compressed with wavelet-based or block-transform-based transformations. These transformations produce a multiresolution pyramid representation of the data. A progressive classifier analyses the image at the coarsest resolution level, and it decides whether each coefficient corresponds to a homogeneous block of pixels in the original image or to a heterogeneous block. In the first case it labels the block, in the second case it recursively analyzes the region of the image at the immediately finer resolution level. Computational efficiency, compared to the classical approach, results from examining a much smaller number of coefficients than the number of pixels in the original image. Thus, progressive classification is a prime candidate as a content-based search operator for remotely-sensed data.
An interactive computer-based tutorial for MATLAB
Authors: B. L. F. Daku
Venue: Proceedings of the 30th Annual Frontiers in Education - Volume 02 (2000)

The paper describes the implementation of an interactive computer based tutorial for MATLAB. Students are engaged in learning new concepts and syntax with video, audio, and interactive exercises. The interactive exercises, which are a distinguishing feature of the tutorial, use a specially designed exercise window which has a background software interface to MATLAB. The learner is challenged with problems in the exercise window immediately after covering new concepts. Hints, example solutions, multiple choice quizzes and test problems, requiring the use of proper MATLAB structure and syntax, add to the learning experience. Student input has played an important role in the development of this tutorial. Student feedback has led to useful improvements, which were integrated into the tutorial. Student evaluation results, which are presented in the paper, indicate great promise for this approach to teaching MATLAB and, by extension, other programming languages. The paper also describes various difficulties and problems encountered in developing this computer based tutorial, which may provide some useful guidelines for others who are considering computer based instruction. Note that an Internet site, www.m-tutor.usask.ca is available, where the reader can obtain more information on the tutorial.
Simulating corporate project engineering for freshmen
Authors: E. Wang
Venue: Proceedings of the 28th Annual Frontiers in Education - Volume 03 (1998)

A novel approach to project engineering at the freshmen level is presented. For the past two years a pilot offering of a two-course sequence has been implemented. The goal of the sequence is to present a realistic view of mechanical engineering, provide the students with a set of basic skills, and develop team skills through the use of a simulated industrial environment. Practicing engineers and experts meet with the students to exchange ideas and discuss career paths. Technical writing, oral presentations, graphics, Internet access, and spreadsheets are also covered in skills labs. In the projects portion of the course students play the role of design engineers within a "class corporation". Incentive-based grades, peer evaluation, and the ability to sub-contract work to other teams are key components. Students must communicate their designs to both their peers and invited industrial representatives in written, oral, and electronic formats, Results from the first two years are promising and student feedback has been excellent. The web-based courses have been team taught and developed by both senior and junior faculty. The project topics and outcomes from the first two years are presented along with the lessons learned from each of the four offerings. Since the courses were developed for a small engineering school, where the typical freshmen class size is 50, possible methods to replicate the course structure within other (larger) departments and institutions are also discussed.
Enabling certification for dynamic partial reconfiguration using a minimal flow
Authors: B. Rousseau, Ph. Manet, D. Galerin, D. Merkenbreack, J.-D. Legat, F. Dedeken, Y. Gabriel
Venue: Proceedings of the conference on Design, automation and test in Europe (2007)

As the trend in reconfigurable electronics goes towards strong integration, FPGA devices are becoming more and more interesting. They are already used for safety-critical applications such as avionics [9]. Latest FPGA's also enable new techniques such as dynamic partial reconfiguration (DPR), allowing new possibilities in terms of performance and flexibility. Their use in safety-critical systems is considered as impossible nowadays since they must be strictly validated, and DPR brings many new issues. Indeed, the tools used for DPR must be certified, which is barely impossible for the current DPR tools provided by the vendors. We have developed a simple flow upon the usual static one for Xilinx FPGA's that does not require any support of the vendor tools for DPR. This lessens the complexity of tools certification, and make a step towards enabling the certification of DPR for safety-critical applications. Moreover, under strong hypotheses, and by using safe design principles, we show how the complexity of certifying DPR can be reduced.
High quality factor copper inductors integrated in deep dry-etched quartz substrates
Authors: C. Leroy, M. B. Pisani, C. Hibert, D. Bouvet, M. Puech, A. M. Ionescu
Venue: Microsystem Technologies (2007)

This paper reports on an inductor fabrication method capable to deliver high quality factor (Q) and high self-resonance frequency (SRF) devices using quartz insulating substrates and thick high-conductivity copper lines. Inductors are key devices in RF circuits that, when fabricated on traditional semiconductor substrates, suffer from poor RF performances due to thin metallization and substrate related losses. Many previous works revealed that RF performances are strongly dependent on the limited metallization thickness and on the conductivity of the substrate. In this paper we demonstrate a new fabrication process to improve the Q factor of spiral inductors by patterning thick high conductive metal layers directly in a dielectric substrate. Moreover, we develop and validate accurate equivalent circuit modeling and parameter extraction for the characterization of the fabricated devices.
Interfaces between the Foundation Coalition integrated curriculum and programs for honors, minority, women, and transfer students
Authors: K. Watson, M. R. Anderson-Rowland
Venue: Proceedings of the Frontiers in Education Conference, on 1995. Proceedings., 1995 - Volume 02 (1995)

The Foundation Coalition includes seven institutions, all of which are in the process of developing an engineering curriculum that incorporates the integration of courses, the utilization of active and cooperative learning in the classroom, and the use of technology in the classroom to enhance the level and sophistication of content and problems approached. During the 1994-1995 academic year, all of these institutions piloted a freshman curriculum that involved various levels of integration of the courses that students take. Typically, this involved the integration of physics, calculus, English, engineering design graphics, chemistry and engineering problem solving over both semesters of the freshman year. In addition, the students took humanities or social science electives. One of the goals of this Coalition is to increase the enrolment and support of women and underrepresented minorities. This paper describes several conflicts which the integrated approach created for students in special programs in the College of Engineering. Most of these programs have existed for many years in the College, and have activities with proven records for enhancing the educational experience and retention in engineering. These conflicts are described, and some of the initial strategies for resolving the conflicts are presented, as well as plans for assuring that these programs work together effectively as the integrated program expands and becomes institutionalized. Resolving these conflicts is a challenge the integrated curriculum must meet in order to be effective for a large number of students.
Sensor and Ad HocWireless Networks
Authors: Martin Drozda
Venue: Proceedings of the Seventh International Conference on Application of Concurrency to System Design (2007)

Sensor and ad hoc wireless networks lack a fixed infrastructure in the form of wireline, or base stations to support the communication. Instead, any participating wireless device can act as a router, when a direct communication is not possible. Sensor and ad hoc wireless networks is an area of very active research. In this tutorial we discuss issues specific to this flavor of communication networks: MAC and routing protocols, protocol interactions, mobility models, misbehavior and misbehavior detection, and relevant graph-theoretic concepts. The current network simulation tools will also be discussed.