ppxscal/embedding_network huggingface dataset:
A Self-Organizing MAC Protocol for DSRC based Vehicular Ad Hoc Networks
Authors: Fan Yu, Subir Biswas
Venue: Proceedings of the 27th International Conference on Distributed Computing Systems Workshops (2007)

This paper presents a novel Medium Access Control protocol for inter-vehicular wireless networking using the emerging Dedicated Short Range Communication (DSRC) standards. The main contribution of the paper is the design of a self-configuring TDMA protocol capable of inter-vehicle message delivery with short and deterministic delay bounds. A novel feature of VeSOMAC is its in-band control mechanism for exchanging TDMA slot information during distributed MAC scheduling. It is shown that by avoiding explicit timing information exchange, VeSOMAC can work without intervehicle time synchronization. The in-band control mechanism is also used for fast protocol convergence during initial network setup and topology changes due to vehicle movements. A simulation model has been developed for comparing VeSOMAC's performance with that of DSRC-recommended 802.11 MAC for traffic safety applications.
Determining the Position and Orientation of Multi-Tagged Objects Using RFID Technology
Authors: Steve Hinske
Venue: Proceedings of the Fifth IEEE International Conference on Pervasive Computing and Communications Workshops (2007)

The idea of smart shelves or tables equipped with RFID technology has been around for some time now. A number of commercial products are already available, especially for retailing. All presented solutions, however, are designed to only identify objects currently in range. While this may be sufficient for some applications, there are others that do not only require identification, but furthermore the exact position and orientation of the objects. In this paper, we present an approach to determine the position and orientation of multi-tagged objects. We introduce the general idea, describe our developed system, and present preliminary findings. We also summarize our next steps and describe a planned evaluation.
Letter to the Editor: Super-attracting periodic orbits for a classical third order method
Authors: S. Amat, C. Bermúdez, S. Busquier, J. Carrasco, S. Plaza
Venue: Journal of Computational and Applied Mathematics (2007)

We use a classical third order root-finding iterative method for approximating roots of nonlinear equations. We present a procedure for constructing polynomials so that super-attracting periodic orbits of any prescribed period occur when this method is applied. This note can be considered as the second part of our previous study [S. Amat, S. Busquier, S. Plaza, A construction of attracting periodic orbits for some classical third order iterative methods, J. Comput. Appl. Math. 189(1-2) (2006) 22-33].
Independent calculation of power parameters on PMC method
Authors: H. Yamamoto
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 01 (1996)

To achieve robust speech recognition in noise, noise compensation techniques is necessary. The effectiveness of the parallel model combination technique (PMC) due to Gales (see Speech Communication, vo1.22, no.3, p.231-9, 1993) has been reported earlier. However, we found that the noise compensation mechanism using the basic PMC method didn't work well on the power parameters. We first show that there is a mismatch in the power parameters in the PMC method. Then, we propose a new method called IPPMC which calculates the power parameters independently of the other cepstral parameters. Finally we evaluate the IPPMC through the investigation of spectral envelopes, the comparison of the model distances to the target HMM trained by noisy speech and the experiment of the speaker-independent continuous speech recognition. The IPPMC improved the word accuracy from 82.1% obtained by the PMC to 85.5% at 10 dB SNR.
Life begins at 65: unless you are mixed signal?
Authors: Reimund Wittmann, Massimo Vanzi, Hans-Joachim Wassener, Navraj Nandra, Joachim Kunkel, Jose Franca, Christian Münker
Venue: Proceedings of the conference on Design, automation and test in Europe (2007)

The old school of analog designers, exemplified by pioneer Bob Pease, is becoming an extinct species. But the demand for analog/mixed-signal IP blocks has never been greater, especially at 65 nm and below. Can this demand be met by using externally designed 3rd party analog/mixed-signal IP? Or is the implementation of revolutionary changes to traditional work flows and analog design processes a suitable option? Which solutions that help in increasing design efficiency are currently on the table? In the future, which side of the table will analog designers of Bob Pease's generation sit: the IP provider or the chip company? Or are their skills redundant for the 65 nm analog design challenges?
Teaching about values and engineering: the American electric utility industry as a case study
Authors: R. F. Hirsh
Venue: Proceedings of the Frontiers in Education Conference, on 1995. Proceedings., 1995 - Volume 02 (1995)

Engineering students are often forced to take courses in the humanities and social sciences. Even so, they rarely learn how to bridge the gap between the technical and nontechnical world. As a result, they usually fail to understand the significance of values in the every-day functioning of their craft. This paper describes a class module designed for the SUCCEED program at Georgia Tech that seeks to remedy this failure. It employs a case study of the American electric utility industry to demonstrate how power company managers-usually trained as engineers-adopted a value system based on growth in electricity consumption and big new technology. For decades, the public and utility regulators shared that value system, but when the energy crisis struck in the 1970s, the public and regulators adopted low-growth and environmentally-conscious values that conflicted with those held by managers. Ultimately, managers lost control over the industry. Today's turmoil in the utility industry can be explained partly by the changing value systems. Telling the story in the course module should alert engineering students to the importance of values and the social fabric as they practice their profession. 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
Simulations of egoistic and altruistic behaviors using the vidya multiagent system platform
Authors: Marcelo Souza Pita, Fernando Buarque Lima Neto
Venue: Proceedings of the 2007 GECCO conference companion on Genetic and evolutionary computation (2007)

This paper investigates the impacts of individual egoistic and altruistic behaviors in a virtual society built upon the Vidya game, used here as the social simulation and Multiagent System (MAS) platform. The Vidya game was adapted to support Jivas' (autonomous intelligent agents of the Vidya game) social behavior, including formation of reputations, creation of clans and "co"-action based on leadership. The evolving society of Jivas, using the above mentioned social behaviors, becomes an ordered and complex MAS. The experiments carried out demonstrate the impacts of individual altruistic and egoistic behaviors on society and emergence of social order through time as an important and desirable event in open MAS and societies.
A CMOS low noise amplifier for biomedical telemetry applications
Authors: R. L. Moreno, E. C. Rodrigues
Venue: Proceedings of the Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS (2003)

This paper describes a 200 MHz inductorless low-noise amplifier (LNA) fabricated in a standard digital 0.35-/spl mu/m AMS CMOS process. The LNA has been measured to have a noise figure of 2.6 dB and a 24 dB gain at 200 MHz. The input IP3 is -12 dBm.
C/C++ compiler support for Siemens TriCore DSP instruction set
Authors: Hao Shi
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 04 (1999)

How to make compilers more useful for developing DSP applications and reduce reliance on assembly coding has long been a topic of interest in the DSP community. This paper presents Siemens solutions for supporting its TriCore DSP/microcontroller architecture, including SIMD instructions, at the C/C++ level. Two solutions based on either extending C/C++ language with the new built-in DSP data types or developing an external DSP class library are investigated. First cut implementations of both methods have achieved 80% coverage of the TriCore instruction set, which is 30 percent higher than the coverage before DSP support was added.
Towards Effective Security Policy Management for Heterogeneous Network Environments
Authors: Lawrence Teo, Gail-Joon Ahn
Venue: Proceedings of the Eighth IEEE International Workshop on Policies for Distributed Systems and Networks (2007)

In this paper, we overview a system-driven policy framework called Chameleos-x and discuss how a practical, system-driven approach could be used to address the problem of enforcing security policies consistently in a changing, diversity-rich environment. The Chameleos-x framework is specially designed to facilitate the management of consistent security policies in heterogeneous environments. We also describe our experimentation of Chameleos-x to demonstrate the feasibility of the proposed approach.
Creating online faculty collaboration to develop engineering education computer learning materials
Authors: A. Hill
Venue: Proceedings of the Frontiers in Education Conference, 2001. 31st Annual - Volume 02 (2001)

The expansion of the Internet has introduced new options for developing science, math and engineering classes. Digital libraries such as NEEDS.org provide attractive options for courseware authors to widely distribute their work. NEEDS (National Engineering Education Delivery System) has implemented mechanisms to link multidisciplinary experts in an online community focused on improving the quality of engineering courseware. These collaborative mechanisms are based on interview results from the winners of the annual Premier Award for Excellence in Engineering Education Courseware, presented annually. This project focuses on identifying and describing the needs of courseware authors and evaluating how the NEEDS developments in the faculty community support collaboration.
Parameterized tiled loops for free
Authors: Lakshminarayanan Renganarayanan, DaeGon Kim, Sanjay Rajopadhye, Michelle Mills Strout
Venue: Proceedings of the 2007 ACM SIGPLAN conference on Programming language design and implementation (2007)

Parameterized tiled loops-where the tile sizes are not fixed at compile time, but remain symbolic parameters until later--are quite useful for iterative compilers and "auto-tuners" that produce highly optimized libraries and codes. Tile size parameterization could also enable optimizations such as register tiling to become dynamic optimizations. Although it is easy to generate such loops for (hyper) rectangular iteration spaces tiled with (hyper) rectangular tiles, many important computations do not fall into this restricted domain. Parameterized tile code generation for the general case of convex iteration spaces being tiled by (hyper) rectangular tiles has in the past been solved with bounding box approaches or symbolic Fourier Motzkin approaches. However, both approaches have less than ideal code generation efficiency and resulting code quality. We present the theoretical foundations, implementation, and experimental validation of a simple, unified technique for generating parameterized tiled code. Our code generation efficiency is comparable to all existing code generation techniques including those for fixed tile sizes, and the resulting code is as efficient as, if not more than, all previous techniques. Thus the technique provides parameterized tiled loops for free! Our "one-size-fits-all" solution, which is available as open source software can be adapted for use in production compilers.
Test quality analysis and improvement for an embedded asynchronous FIFO
Authors: Tobias Dubois, Erik Jan Marinissen, Mohamed Azimane, Paul Wielage, Erik Larsson, Clemens Wouters
Venue: Proceedings of the conference on Design, automation and test in Europe (2007)

Embedded First-In First-Out (FIFO) memories are increasingly used in many IC designs. We have created a new full-custom embedded FIFO module with asynchronous read and write clocks, which is at least a factor two smaller and also faster than SRAM-based and standard-cell-based counterparts. The detection qualities of the FIFO test for both hard and weak resistive shorts and opens have been analyzed by an IFA-like method based on analog simulation. The defect coverage of the initial FIFO test for shorts in the bit-cell matrix has been improved by inclusion of an additional data background and low-voltage testing; for low-resistant shorts, 100% defect coverage is obtained. The defect coverage for opens has been improved by a new test procedure which includes waiting periods.
Laboratory enhancements through partnerships with local industry for a course in wireless communications
Authors: K. A. Kramer
Venue: Proceedings of the Frontiers in Education Conference, 2001. on 31st Annual - Volume 01 (2001)

Results from recent and ongoing sections of a course in wireless communications are discussed. Development of the laboratory portion of such courses is challenging because of the wide variety of topics and the rapid advancements of specialized technology in the field. By developing industry contacts through alumni, consulting, and a local professional society, a few members of local industry were found who were motivated to work with the instructor to enhance the course. Rather than limiting their involvement to advisory activities, arrangements were made for on-site demonstrations that allowed the students to experience use of equipment and software that is not available in most university settings. Follow-up activities include simulation exercises based upon a widely available applications program that use actual system parameters and calculations provided by industry contacts.
A One's Complement Cache Memory
Authors: Qing Yang, Sridhar Adina
Venue: Proceedings of the 1994 International Conference on Parallel Processing - Volume 01 (1994)

Most of today's microprocessors have an on-chip cache to reduce average memory access latency. These on-chip caches generally have low associativity and small sizes. Cache line conflicts are the main source of cache misses which are essential to overall system performance. This paper introduces an innovative, conflict-free cache design, called one's complement cache. By means of parallel computation of cache addresses and memory addresses of data, the new design does not increase critical hit time of cache accesses. Cache misses caused by line interferences are minimized by means of evenly distributing data items referenced by program loops across all sets in a cache. Evenly distribution of data in the cache is achieved by making the number of sets in the cache a prime or an odd number thereby the chance of related data being mapped to a same set is small. Trace-driven simulations are used to evaluate the performance of the new design. Performance results on a set of programs from SPEC92 benchmarks show that the new design improves cache performance over the conventional set-associative cache by about 100% with negligibly additional hardware cost.
PRO-COW: Protocol compliance on the web-a longitudinal study
Authors: Balachander Krishnamurthy, Martin Arlitt
Venue: Proceedings of the 3rd conference on USENIX Symposium on Internet Technologies and Systems - Volume 3 (2001)

With the recent (draft) standardization of the Hypertext Transfer Protocol - HTTP/1.1 protocol on the Web, it is natural to ask what percentage of popular Web sites speak HTTP/1.1 and how compliant are these so-called HTTP/1.1 servers. We attempt to answer these questions through a series of experiments based on the protocol standard. The tests were run on a comprehensive list of popular Web sites to which a good fraction of the Web traffic is directed. Our experiments were conducted on a global extensible testing infrastructure that we built to answer the above questions. The tests were carried out over a period of 16 months and were repeated thrice during the period. Our results show reasons for concern on the state of HTTP/1.1 protocol compliance: some servers do not properly support basic features such as the HEAD method, while many popular servers do not support some of the key features (such as persistent connections) that were added in HTTP/1.1. Perhaps most alarming of all, some servers crashed during testing. As a result we believe that small (but significant) changes to the wording of the protocol specification are required.
Localized watermarking: methodology and application to template mapping
Authors: D. Kirovski
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 06 (2000)

The semiconductor industry has adopted the intellectual property (IP) business model as a dominant system-on-chip development platform. Since copyright fraud has been recognized as the most devastating obstruction to this model, a number of techniques for IP protection have been introduced. Most of them rely on a selection of a global solution to an optimization problem according to a unique user-specific digital signature. Although such techniques may provide convincing proof of authorship with little hardware overhead, they fail to protect design partitions, do not provide an easy procedure for watermark detection, and are not capable of detecting the watermark when the design or its part is augmented in another larger design. Since these demands are of the highest interest for the IP business, we introduce localized watermarking as an IP protection technique which enables these features while satisfying the demand for low-cost and transparency. We have applied the new watermarking technology to template mapping, a behavioral synthesis task. This watermarking method has been tested on a set of real-life benchmarks where high likelihood of authorship has been achieved with negligible overhead in solution quality.
Artificial Intelligence: Cannibal or Missionary?
Authors: Margaret Boden
Venue: AI Society (2007)

Some of the concerns people have about A1 are: its misuses, effect on unemployment, and its potential for dehurnanising. Contrary to what most people believe and fear, GIcan lead to respect for the enormous power and complexity of the human mind. It is potentially very dangerous for users in the public domain to impute much more inferential power to computer systems, which look common-sensical, than they actually have. No matter how impressive A1 programs may be, we must be aware of their limitations and should not abrogate human responsibility to such programs.
Three essays on modeling land use change and spatial econometric analysis of residential property value
Authors: Molly Espey
Venue:  (2006)

Neural network is used as an alternative for modeling land use change in coastal area. The neural net is superior to the logistic model in terms of approximation, accuracy and error as shown by this study. The results also show that neural net is more reliable for identification of spatial patterns and relationships. Using hedonic analysis of residential properties and employing spatial econometric analysis, various spatial variables were estimated to have significant impact on the values of residential properties in urban/rural interface of Greenville County, South Carolina. The spatial-temporal model reduces the problem of error correlation with the nearest neighbors relative to those produced by the non-spatial OLS model. Both urban-rural fringe location and lake proximity were estimated to have significant positive impact on the values of residential properties in the upstate of South Carolina. Spatial econometric models are employed to account for spatial effects in housing price analysis and to increase prediction accuracy.
Applications in Parallel MATLAB
Authors: Brian Guilfoos, Judy Gardiner, Juan Carlos Chaves, John Nehrbass, Stanley Ahalt, Ashok Krishnamurthy, Jose Unpingco, Alan Chalker, Laura Humphrey, Siddharth Samsi
Venue: Proceedings of the HPCMP Users Group Conference (2006)

The parallel MATLAB implementations used for this project are MatlabMPI[1] and pMatlab[1], both developed by Dr. Jeremy Kepner at MIT-LL. MatlabMPI is based on the Message Passing Interface standard, in which processes coordinate their work and communicate by passing messages among themselves. The pMATLAB library supports parallel array programming in MATLAB. The user program defines arrays that are distributed among the available processes. Although communication between processes is actually done through message passing, the details are hidden from the user.
Dynamic optimization by evolutionary algorithms applied to financial time series
Authors: K. Yaniasaki, K. Kitakaze, M. Sekiguchi
Venue: Proceedings of the Evolutionary Computation on 2002. CEC '02. Proceedings of the 2002 Congress - Volume 02 (2002)

It is not clear what is an optimum state, when it's objective function changes. Dynamic optimization contains trade-offs of which a good optimization at present may make it difficult to optimize at the next time after the objective function changed. This means a similarity between a dynamic optimization and a multiobjective optimization. So, in our previous works, we developed a method that uses multiobjective ranking to dynamic optimization problems. In this work we apply our proposed method to financial time series.
Adventures of a Logician-Engineer: A Journey through Logic, Engineering, Medicine, Biology, and Statistics
Authors: Limsoon Wong
Venue: Proceedings of the Eighth International Symposium on Symbolic and Numeric Algorithms for Scientific Computing (2006)

Whenever a programmer writes a loop, or a mathematician does a proof by induction, an invariant is involved. The discovery and understanding of invariants often underlies problem solving in many domains. I will discuss here my search for powerful invariants over the past decade.
Idleness is not sloth
Authors: Richard Golding, Peter Bosch, Carl Staelin, Tim Sullivan, John Wilkes
Venue: Proceedings of the USENIX 1995 Technical Conference Proceedings on USENIX 1995 Technical Conference Proceedings (1995)

Many people have observed that computer systems spend much of their time idle, and various schemes have been proposed to use this idle time productively. The commonest approach is to off-load activity from busy periods to less-busy ones in order to improve system responsiveness. In addition, speculative work can be performed in idle periods in the hopes that it will be needed later at times of higher utilization, or non-renewable resource like battery power can be conserved by disabling unused resources. We found opportunities to exploit idle time in our work on storage systems, and after a few attempts to tackle specific instances of it in ad hoc ways, began to investigate general mechanisms that could be applied to this problem. Our results include a taxonomy of idle-time detection algorithms, metrics for evaluating them, and an evaluation of a number of idleness predictors that we generated from our taxonomy.