ppxscal/embedding_network huggingface dataset:
Square Meshes are not Optimal for Convex Hull Computation
Authors: D. Bhagavathi, II. Gurla, S. Olariu, R. Lin, J. L. Schwing, J. Zhang
Venue: Proceedings of the 1993 International Conference on Parallel Processing - Volume 03 (1993)

Recently it has been noticed that for semigroup computations and for selection, rectangular meshes with multiple broadcasting yield faster algorithms than their square counterparts. The contribution of this paper is to provide yet another example of a fundamental problem for which this phenomenon occurs.
DSP data path synthesis for low-power applications
Authors: L.-Y. Chiou
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 200. on IEEE International Conference - Volume 02 (2001)

We present a high-level synthesis technique targeting low power consumption for data-dominated applications. We have used a statistical estimation technique to obtain the switching activity of modules when sharing of computing resources are required in a design. The technique enables us to understand the switching behavior under resource sharing. Using the relationship between switching power and resource sharing thus obtained, we developed scheduling and allocation algorithms to reduce the data path switching power. Experiments performed on various examples show up to 49% improvement in power reduction under resource constraints.
Deploying Reliable IPv6 Temporary Networks Thanks to NEMO Basic Support and Multiple Care-of Addresses Registration
Authors: Romain Kuntz
Venue: Proceedings of the 2007 International Symposium on Applications and the Internet Workshops (2007)

In this paper, we will explain how an IPv6 temporary network can be easily deployed using NEMO Basic Support, while keeping usual network requirements such as load balancing and fault-tolerance using Multiple Care-of Addresses registration, and easy administration with policy exchange mechanisms. We will detail a scenario and its feasibility will be endorsed by the results obtained in a real deployment.
IEEE PDI: a gateway for lifelong engineering education
Authors: L. Feisel
Venue: Proceedings of the Frontiers in Education Conference, 2001. on 31st Annual - Volume 01 (2001)

The IEEE Professional Development Institute (IEEE PDI) began as an experiment to use the Web for online courses and has developed into a clearinghouse of information and resources, including conventional and online graduate and short courses. Launched during 2001, the IEEE PDI site links engineers with learning resources from the IEEE, universities and commercial providers. This site also provides overview materials as a service to IEEE members and customers. One IEEE PDI challenge is the development of career "maps" useful for gap analysis and locating appropriate resources. The development of IEEE PDI dovetails with the NSF-funded DLNET Project headed by Virginia Tech in which IEEE, ASEE and Iowa State are co-PI's. This project focuses on bringing lifelong engineering education into digital libraries, and addresses issues such as pedagogy for online instruction as well as methodologies for collecting learning objects.
Error Analysis for Operations in Solid Modeling in the Presence of Uncertainty
Authors: Lars-Erik Andersson, Neil F. Stewart, Malika Zidani
Venue: SIAM Journal on Scientific Computing (2007)

The problem of maintaining consistent representations of solids in computer-aided design and of giving rigorous proofs of error bounds for operations such as regularized Boolean intersection has been widely studied for at least two decades. One of the major difficulties is that the representations used in practice not only are in error but are fundamentally inconsistent. Such inconsistency is one of the main bottlenecks in downstream applications. This paper provides a framework for error analysis in the context of solid modeling, in the case where the data is represented using the standard representational method, and where the data may be uncertain. Included are discussions of ill-condition, error measurement, stability of algorithms, inconsistency of defining data, and the question of when we should invoke methods outside the scope of numerical analysis. A solution to the inconsistency problem is proposed and supported by theorems: it is based on the use of Whitney extension to define sets, called Quasi-NURBS sets, which are viewed as realizations of the inconsistent data provided to the numerical method. A detailed example illustrating the problem of regularized Boolean intersection is also given.
An approach of the geometrical-based single bounce elliptical channel model for mobile environments
Authors: M. R. Arias, B. Mandersson
Venue: Proceedings of the The 8th International Conference on Communication Systems - Volume 01 (2002)

The simulation approach is an important tool used for the design and implementation of mobile radio systems with an emphasis on the propagation modeling for wireless channel. We carried out simulations for three different street positions scenarios of the receiver, (mobile station), using the geometrical-based single bounce elliptical channel model, as might be appropriate for microcellular applications and mobile-to-mobile communication. From the simulation results we use the parameters time-of-arrival (TOA) and angle-of-arrival (AOA), (delay and angular domain, respectively), to estimate the higher order channel statistics, such as the delay spread (DS) and the angle spread (AS), respectively.
A grid-based infrastructure to support multimedia content distribution
Authors: Giovanni Novelli, Giuseppe Pappalardo, Corrado Santoro, Emiliano Tramontana
Venue: Proceedings of the second workshop on Use of P2P, GRID and agents for the development of content networks (2007)

This paper proposes a software architecture able to realise a Content Distribution Network (CDN), for multimedia data, by means of a Grid computing environment. The key aspect of the proposed approach is exploiting the computational power of a Grid not only to store replicas of the same multimedia content, but also to perform on-the-fly transcoding, when the requesting client is using a player that cannot handle the original file format. The proposed software infrastructure, which exploits Globus Grid services, is able on one hand to identify the storage element, holding the replica, which is the nearest to the client (if such a replica exists); and on the other hand, when the requested file is encoded with a scheme that the player cannot support, the infrastructure selects the computing element which is "best suited" - i.e. has enough computational power - to perform on-the-fly transcoding, thus providing data to the user with the requested format. This selection is based on proper metrics that aim at minimising latencies in order to increase the quality-of-service for the user.
Trust region Newton methods for large-scale logistic regression
Authors: Chih-Jen Lin, Ruby C. Weng, S. Sathiya Keerthi
Venue: Proceedings of the 24th international conference on Machine learning (2007)

Large-scale logistic regression arises in many applications such as document classification and natural language processing. In this paper, we apply a trust region Newton method to maximize the log-likelihood of the logistic regression model. The proposed method uses only approximate Newton steps in the beginning, but achieves fast convergence in the end. Experiments show that it is faster than the commonly used quasi Newton approach for logistic regression. We also compare it with linear SVM implementations.
Active and cooperative learning in an introductory chemical engineering course
Authors: D. DiBiasio, J. E. Groccia
Venue: Proceedings of the Frontiers in Education Conference, on 1995. Proceedings., 1995 - Volume 02 (1995)

A sophomore level chemical engineering course was redesigned to emphasize active and cooperative learning. The structure used was a peer-assisted cooperative learning model developed at WPI. The experimental course was compared to a control course taught by the passive lecture method. The control and test courses were compared using student performance, attitudes, evaluations of the course and instructor and faculty time. We found that student performance was better and content coverage was increased in the test class. Faculty time was reduced by 24% using the peer assisted cooperative learning model. Composite student evaluations of the course and instructor increased slightly from the control to the test course. Student attitudes about the profession increased during the test course, but were mixed regarding working in teams.
Single Event Effects in 1Gbit 90nm NAND Flash Memories under Operating Conditions
Authors: M. Bagatin, G. Cellere, S. Gerardin, A. Paccagnella, A. Visconti, S. Beltrami, M. Maccarrone
Venue: Proceedings of the 13th IEEE International On-Line Testing Symposium (2007)

We tested a commercial 1Gbit 90nm NAND memory under exposure to a constant flux of heavy ions, aiming to study its behaviour in the space environment. We identified and classified different types of errors under various operating conditions. We observed single bit upsets both in the floating gate array and in the page buffer, alongside with functional interruptions during program and, to a lesser extent, erase operations. Our results provide some insight on possible issues which may arise also at sea-level with future (and more sensitive) Flash generations.
Noisy channel relaxation for VQ design
Authors: S. Gadkari
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 04 (1996)

We study the structure and design of a vector quantizer (VQ) for robust performance under noisy channel conditions. We develop some new insights about the geometrical structure of such a VQ, and introduce noisy channel relaxation-a novel design approach. In particular, the approach is used to attack two basic problems: (1) optimize the VQ for a given noisy channel; and (2) optimize index assignment while maintaining optimality for the noiseless channel. For problem (1) we show consistent improvements over descent methods at the cost of manageable increase in complexity (by a factor of up to three). For problem (2) we obtain index assignment with a quality significantly better than known methods, but at computational complexity that grows many times slower.
InvenTcl: interpretive 3D graphics using open inventor and Tcl/[incr Tcl]
Authors: Sidney Fels, Silvio Esser, Armin Bruderlin, Kenji Mase
Venue: Proceedings of the 5th conference on Annual Tcl/Tk Workshop 1997 - Volume 5 (1997)

Open Inventor is an object oriented 3D graphics toolkit written in C++. Because Open Inventor is written in C++, typical user code development consists of a program/compile/debug iteration cycle. This paper introduces InvenTcl which is an interpretive version of Open Inventor using Tcl/Tk [4] and [incr Tcl] [3]. The advantages of InvenTcl include: script-able and direct manipulation of 3D objects in an Open Inventor scene, easy prototyping of 3D graphics and animation, and low-bandwidth communication of 3D scenes and animations (using scripts).
An anatomy of guile, the interface to Tcl/Tk
Authors: Thomas Lord
Venue: Proceedings of the 3rd Annual USENIX Workshop on Tcl/Tk - Volume 3 (1995)

Guile is an extension language library consisting of a virtual machine, run-time system, and front ends for multiple languages. Guile has been closely integrated with Tcl/Tk [Ousterhout] so that Tcl and Tk modules can be used by Guile programs, and Guile programs can be used to extend Tcl/Tk applications. This paper gives an overview of the structure and function of Guile, and includes some notes about how it is expected to evolve in the future. The technical relation between Tcl/Tk and Guile is given special attention.
A case for source-level transformations in MATLAB
Authors: Vijay Menon, Keshav Pingali
Venue: Proceedings of the 2nd conference on Conference on Domain-Specific Languages - Volume 2 (1999)

In this paper, we discuss various performance overheads in MARLAB codes and propose different program transformation strategies to overcome them. In particular, we demonstrate that high-level source-to-source transformations of MATLAB programs are effective in obtaining substantial performance gains regardless of whether programs are interpreted or later compiled into C or FORTRAN. We argue that automating such transformations provides a promising area of future research.
Dynamic resource management and automatic configuration of distributed component systems
Authors: Fabio Kon, Tomonori Yamane, Christopher K. Hess, Roy H. Campbell, M. Dennis Mickunas
Venue: Proceedings of the 6th conference on USENIX Conference on Object-Oriented Technologies and Systems - Volume 6 (2001)

Component technology promotes code-reuse by enabling the construction of complex applications by assembling off-the-shelf components. However, components depend on certain characteristics of the environment in which they execute. They depend on other software components and on hardware resources. In existing component architectures, the application developer is left with the task of resolvig those dependencies, i.e., making sure that each component has asscess to all the resources it needs and that all the required components are loaded. Nevertheless, according to encapsulation principles, developers should not be aware of the component internals. Thus, it may be difficult to find out what a component really need. In complex systems, this manual approach to dependency management can lead to disastrous results. In this paper, we propose an integrated architecture for managing dependencies in distributed component-based systems in an effective and uniform way. The architecture supports automatic configuration and dynamic resource management in distributed heterogeneous environments. We describe a concrete implementation of this architecture and present experimental results.
Laboratories for data communications and computer networks
Authors: R. Goyal
Venue: Proceedings of the 28th Annual Frontiers in Education - Volume 03 (1998)

In this paper we describe a hands-on laboratory oriented instructional package that we have developed for data communications and networking. The package consists of a software tool, together with instructional material for a laboratory based networking curriculum. The software is based on a simulation environment that enables the student to experiment with various networking protocols, on an easy to use graphical user interface (GUI). Data message flows, packet losses, control/routing message flows, virtual circuit setups, link failures, bit errors etc., are some of the features that can be visualized in this environment. The student can also modify the networking components provided, as well as add new components using the C programming language. The instructional material consists of a set of laboratory exercises for flow and error control (HDLC), IEEE 802.3 CSMA/CD protocol, the token ring protocol, interconnecting LANs via bridges, TCP congestion avoidance and control, IP fragmentation and reassembly, ATM PNNI routing and ATM policing. The laboratory exercises have facilitated the development of a networking curriculum based on both the traditional computer networking principles, as well as the new technologies in telecommunication networking. The laboratory environment has been used in the networking curriculum at the Ohio State University, and is being piloted at other universities. The entire package is freely available over the Internet.
A non-intrusive isolation approach for soft cores
Authors: Ozgur Sinanoglu, Tsvetomir Petrov
Venue: Proceedings of the conference on Design, automation and test in Europe (2007)

Cost effective SOC test strongly hinges on parallel, independent test of SOC cores, which can only be ensured through proper core isolation techniques. While a core isolation mechanism can provide controllability and observability at the core I/O interface, its implementation may have various implications on area, functional timing, test time and data volume, and at-speed coverage on the core interface. In this paper, we propose a non-intrusive core isolation technique that is based on the utilization of existing core registers for isolating the core. We provide a core register partitioning algorithm that is capable of identifying the core interface registers, and of robustly isolating a core, resulting in a computationally efficient core isolation implementation that is area and performance efficient at the same time. The proposed isolation technique also ensures minimal test time increase and no at-speed coverage loss on the core interface, offering an elegant solution for soft cores, and thus enabling significant SOC test cost reductions.
Development and Experiment of a Game Based Learning Program for e-Money Literacy Education
Authors: Tadahiro Hata, Naoki Ushijima, Hiroyuki Hiraga, Kenzi Watanabe
Venue: Proceedings of the The First IEEE International Workshop on Digital Game and Intelligent Toy Enhanced Learning (2007)

We have developed a game based learning program for e-money literacy education. We applied "The Game of Life" as an educational material. We have developed an e-money system for the game with RFID tag, and we have had experimental classroom using this system at Jr. and Sr. high school. Students played "The Game of Life" using both paper money and e-money in the classroom. Then students considered about both paper money and e-money, and they answered questionnaire. Results show our game based educational program is effective.
On the use of Hadamard expansions in hyperasymptotic evaluation of Laplace-type integrals-IV: Poles
Authors: R. B. Paris
Venue: Journal of Computational and Applied Mathematics (2007)

This paper is one of a series considering the application of Hadamard expansions in the hyperasymptotic evaluation of Laplace-type integrals of the form @!"Cexp{-z@j(t)}f(t)dt for large values of |z|. It is shown how the procedure can be employed to deal with the case when the amplitude function f(t) possesses poles which may coalesce with a saddle point of the integrand or approach the integration path C. A novel feature introduced here is the reverse-expansion procedure. This results in contributions at each exponential level (after the first) of the expansion in the form of rapidly convergent series, thereby enabling the high-precision evaluation of the above integral in coalescence problems. Numerical examples are given to illustrate the procedure.
Science and engineering laboratory courses: their role, computer technology and effective learning
Authors: B. Diong
Venue: Proceedings of the Frontiers in Education Conference, 2001. 31st Annual - Volume 02 (2001)

Computers and the Internet have greatly impacted many aspects of society including Science and Engineering education. So-called virtual (simulated) laboratories and remote (Internet-accessed) laboratories have been developed, sometimes as a replacement for traditional laboratories. Thus a need exists for studying the role of science and engineering laboratories in order to better evaluate the effect of these 'new' laboratories on student learning. The progress of such a study is presented in this note.
ReCycle:: pipeline adaptation to tolerate process variation
Authors: Abhishek Tiwari, Smruti R. Sarangi, Josep Torrellas
Venue: Proceedings of the 34th annual international symposium on Computer architecture (2007)

Process variation affects processor pipelines by making some stages slower and others faster, therefore exacerbating pipeline unbalance. This reduces the frequency attainable by the pipeline. To improve performance, this paper proposes ReCycle, an architectural framework that comprehensively applies cycle time stealing to the pipeline - transferring the time slack of the faster stages to the slow ones by skewing clock arrival times to latching elements after fabrication. As a result, the pipeline can be clocked with a period equal to the average stage delay rather than the longest one. In addition, ReCycle's frequency gains are enhanced with Donor stages, which are empty stages added to "donate" slack to the slow stages. Finally, ReCycle can also convert slack into power reductions. For a 17FO4 pipeline, ReCycle increases the frequency by 12% and the application performance by 9% on average. Combining ReCycle and donor stages delivers improvements of 36% in frequency and 15% in performance onaverage, completely reclaiming the performance losses due to variation.
Stimulating creativity: teaching engineers to be innovators
Authors: L. G. Richards
Venue: Proceedings of the 28th Annual Frontiers in Education - Volume 03 (1998)

Engineering is a creative profession; indeed that phrase appears in the title of a consistently popular introductory textbook. Yet few courses in the standard engineering curriculum require or even encourage creativity. Students often feel that creative behavior is actively discouraged in their classes. Several engineers have designed courses or programs to foster creativity, and the recently rekindled interest in engineering design in the curriculum has led to greater emphasis on innovative thinking. Although creativity is generally required for first and fourth year design projects, it is curiously absent in-between. In this paper, the authors explore the nature of, and conditions supporting, creativity, how to foster it in engineering education and describe several courses designed to teach engineering students to be innovators.
Automatic Thai-Language Essay Scoring Using Neural Network and Latent Semantic Analysis
Authors: Chanunya Loraksa, Ratchata Peachavanish
Venue: Proceedings of the First Asia International Conference on Modelling & Simulation (2007)

In this research, a backpropagation neural network and Latent Semantic Analysis were used to assess the quality of Thai-language essays written by high school students in the subject matter of historical royal Thai literatures. Forty essays written in response to a question were each evaluated by high school teachers and assigned a human score. In the first experiment, we used raw term frequency vectors of the essays and their corresponding human scores to train the neural network and obtain the machine scores. In the second experiment, we pre-processed the raw term frequency vectors using Latent Semantic Analysis technique prior to feeding them to the neural network. The experimental results show that the addition of Latent Semantic Analysis technique improves scoring performance.
Experiments on a parametric nonlinear spectral warping for an HMM-based speech recognizer
Authors: D. J. Mashao
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 01 (1996)

This paper is concerned with the search for an optimal feature-set for a speech recognition system. A better acoustic feature analysis that suitably enhances the semantic information in a consistent fashion can reduce raw-score (no grammar) error rate significantly. A simple two-dimensional parameterized feature-set is proposed. The feature-set is compared against a standard mel-cepstrum, LPC-based feature-set in talker-independent, connected-alphadigit HMM-based recognizer. The results show that a particular combination of parameters yields a significantly lower error rate than the baseline mel-cepstrum LPC-based feature-set. The ACM Portal is published by the Association for Computing Machinery. Copyright © 2010 ACM, Inc. Terms of Usage Privacy Policy Code of Ethics Contact Us Useful downloads: Adobe Acrobat QuickTime Windows Media Player Real Player
A spectral equivalence for Jacobi matrices
Authors: E. Ryckman
Venue: Journal of Approximation Theory (2007)

We use the classical results of Baxter and Golinskii-Ibragimov to prove a new spectral equivalence for Jacobi matrices on l^2(N). In particular, we consider the class of Jacobi matrices with conditionally summable parameter sequences and find necessary and sufficient conditions on the spectral measure such that @?"k"="n^~b"k and @?"k"="n^~(a"k^2-1) lie in l"1^2@?l^1 or l"s^1 for s>=1.