ppxscal/embedding_network huggingface dataset:
Programmable DSP platform for digital still cameras
Authors: K. Illgner
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 04 (1999)

This paper presents a programmable DSP platform for digital still cameras based on the Texas Instruments TMS320C54x family. One major advantage of this platform is that, after capturing an image from a CCD sensor, processing the raw image, and compressing the image for storage is performed on the digital signal processor (DSP). This provides a short shot-to-shot delay and a high degree of flexibility. The system realized also allows instant viewing and selective storing of captured images. This paper outlines the various processing stages necessary to take the raw CCD data and produce a JPEG compressed bit stream and highlighting the advantages of DSPs for this application. The programmable nature of this platform allows for the exploration of different image processing and compression techniques. The low power nature of the digital signal processor provides long battery life.
A new sampling of echo paths in North American networks
Authors: K. C. Ho
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 02 (2000)

Echo return loss and impulse response are important characteristics of an echo path for the design of echo cancellers. This paper presents methodology used to measure the impulse response and the echo return loss of an echo path. The design of the signal is described. We then present the measurement results from over 100 samplings of long distance calls which were made within North America. The measurement results are compared with the study reported by AT&T in 1972.
The (un)Economic Internet?
Authors: kc claffy, Scott O. Bradner, Sascha D. Meinrath
Venue: IEEE Internet Computing (2007)

The Internet Economics track will address how economic and policy issues relate to the emergence of the Internet as critical infrastructure. Here, the authors provide a historical overview of internetworking, identifying key transitions that have contributed to the Internet's development and penetration. Its core architecture wasn't designed to serve as critical communications infrastructure for society; rather, the infrastructure developed far beyond the expectations of the original funding agencies, architects, developers, and early users. The incongruence between the Internet's underlying architecture and society's current use and expectations of it means we can no longer study Internet technology in isolation from the political and economic context in which it is deployed.
Performance Comparison of Iterative Decoding Algorithm Using the Extrinsic Information Transfer Chart
Authors: Xuelan Zou, Guangzeng Feng
Venue: Proceedings of the Sixth International Conference on Networking (2007)

The Extrinsic Information Transfer (EXIT) chart is a powerful tool to design and optimize iterative systems, which visualizes the exchange of mutual information in an iterative system. Bit-interleaved coded modulation with iterative decoding (BICM-ID) is a bandwidth efficient transmission scheme. We study the performance and iterative behavior of the decoding algorithm for BICM-ID system with the tool of EXIT chart. Analysis and simulation results show that fixed-const-log-APP algorithm has the lowest decoding complexity in terms of number of iterations, max-log-APP follows it and log-APP has the highest decoding complexity, but their performance is in inverse order. With the increase of the channel signal-to-noise ratio, their performances come close to each other and it takes fewer iterations for them to get a low bit error rate performance.
Object and concurrency in Triveni: a telecommunication case study in java
Authors: Christopher Colby, Lalita Jategaonkar Jagadeesan, Radha Jagadeesan, Konstantin Läufer, Carlos Puchol
Venue: Proceedings of the 4th conference on USENIX Conference on Object-Oriented Technologies and Systems - Volume 4 (1998)

We describe the interaction of objects and concurrency in the design of Triveni, a framework for concurrent programming with threads and events. Triveni has been realized as JavaTriveni, a collection of tools for the Java programming language. We describe our experiences in JavaTriveni with an example from telecommunication.
Voronoi diagrams in n · 2o(√lg lg n) time
Authors: Timothy M. Chan, Mihai Pǎtraşcu
Venue: Proceedings of the thirty-ninth annual ACM symposium on Theory of computing (2007)

We reexamine fundamental problems from computational geometry in theallword RAM model, where input coordinates are integers that fit in a machine word. We develop a new algorithm for offline point location, a two-dimensional analog of sorting where one needs to order points with respect to segments. This result implies, for example, that the Voronoi diagram of n points in the plane can be constructed in (randomized) time n· 2O(√ lg lg n). Similar bounds hold for numerous other geometric problems, such as three-dimensional convex hulls, planar Euclidean minimum spanning trees, line segment intersection, and triangulation of non-simple polygons. In FOCS'06, we developed a data structure for online point location, which implied a bound of O(n (lg n)/(lg lg n) for Voronoi diagrams and the other problems. Our current bounds are dramatically better, and a convincing improvement over the classic O(n lg n) algorithms. As in the field of integer sorting, the main challenge is to find ways to manipulate information, while avoiding the online problem (in that case, predecessor search).
A Probabilistic Graphical Approach to Computing Electricity Price Duration Curves under Price and Quantity Competition.
Authors: Pascal Michaillat, Shmuel Oren
Venue: Proceedings of the 40th Annual Hawaii International Conference on System Sciences (2007)

The electricity price duration curve (EPDC) represents the probability distribution function of the electricity price considered as a random variable. The price uncertainty comes both from the demand side and the supply side, since the load varies continuously, and not all generators may be available at all times. The production costs of electricity also fluctuate with the price of fuel. EPDCs have many application including the valuation of incremental generation assets or forward contracts on the energy produced by such assets, estimating capacity cost recovery and valuation of energy call options. Traditional approaches for calculating EPDCs were based on approximation methods such as the method of cumulants using Edgeworth expansions of multivariate probability distributions. This paper presents a new approach to compute numerically the EPDC under price and quantity competition models. This numerical method provide both exact numerical results and modeling flexibility. It is based on inference algorithms in probabilistic graphical models (PGMs) which exploit conditional independence relationships among the random variables.
Fabrication and characterization of stacked ZnO and ZnOGa2O3 layers for the realization of bulk acoustic wave resonated membranes
Authors: Y. Zaatar, R. Al Asmar, J. Podlecki, S. Youssef, M. Abdallah, N. Ouaini, A. Foucaran
Venue: Microelectronics Journal (2007)

ZnOGa"2O"3 alloys have been deposited by electron beam co-evaporation technique below the piezoelectric radio frequency magnetron sputtered ZnO films, with the aim of reducing the compressive stress due to the piezoelectric zinc oxide elaborated by radio frequency magnetron technique. The structural characterizations of the Ga"2O"3 thin films show an amorphous structure. Co-evaporating gallium oxide with zinc oxide has improved the optical and structural qualities of the e-beam zinc oxide films. Thus, deposing compressive rf magnetron sputtered piezoelectric ZnO on tensile thin layers of ZnOGa"2O"3, has reduced the stress and improved the structural quality of the realized bulk acoustic wave resonators. The fabrication of less stressed ZnO resonators has permitted to liberate partially our membranes by attacking the silicon substrate on which the resonator is realized. Finally, hyper frequency characterizations have been done by a network analyzer to study the influence of the silicon substrate thickness on the piezoelectric activity.
The Impact of Service-Oriented Application Development on Software Development Methodology
Authors: Marc N. Haines
Venue: Proceedings of the 40th Annual Hawaii International Conference on System Sciences (2007)

Web services technology has become a key technology for system integration and the implementation of service-oriented architectures. However, many organizations are still facing challenges implementing Web services-based applications on a larger scale. The lack of an accepted and reliable framework for the implementation of Web services has been identified, among other issues, as one important challenge. The underlying assumption is that Web services-based implementations entail substantial changes in how applications are developed. The study presented in this paper examines the impact of Web services on the software development process. The current results of this research provide insights into the characteristics of software development based on Web services. The outcomes of this research are intended to contribute to a framework for guiding software methodology choices and adjustments in the context of Web services.
Comprehensive profiling support in the javaTM virtual machine
Authors: Sheng Liang, Deepa Viswanathan
Venue: Proceedings of the 5th conference on USENIX Conference on Object-Oriented Technologies & Systems - Volume 5 (1999)

Existing profilers for Java applications typically rely on custom instrumentation in the Java virtual machine, and measure only limited types of resource consumption. Garbage collection and multi-threading pose additional challenges to profiler design and implementation. In this paper we discuss a general-purpose, portable, and extensible approach for obtaining comprehensive profiling information from the Java virtual machine. Profilers based on this framework can uncover CPU usage hot spots, heavy memory allocation sites, unnecessary object retention, contended monitors, and thread deadlocks. In addition, we discuss a novel algorithm for thread-aware statistical CPU time profiling, a heap profiling technique independent of the garbage collection implementation, and support for interactive profiling with minimum overhead.
An Efficient and Reliable Scientific Workflow System
Authors: Tulio Tavares, George Teodoro, Tahsin Kurc, Renato Ferreira, Dorgival Guedes, Wagner Meira,  Jr., Umit Catalyurek, Shannon Hastings, Scott Oster, Steve Langella, Joel Saltz
Venue: Proceedings of the Seventh IEEE International Symposium on Cluster Computing and the Grid (2007)

This paper presents a fault tolerance framework for applications that process data using a distributed network of user-defined operations in a pipelined fashion. The framework saves intermediate results and messages exchanged among application components in a distributed data management system to facilitate quick recovery from failures. The experimental results show that the framework scales well and our approach introduces very little overhead to application execution.
Test-Length Selection and TAM Optimization for Wafer-Level, Reduced Pin-Count Testing of Core-Based Digital SoCs
Authors: Sudarshan Bahukudumbi, Krishnendu Chakrabarty
Venue: Proceedings of the 20th International Conference on VLSI Design held jointly with 6th International Conference: Embedded Systems (2007)

Wafer-level testing (wafer sort) is used in the semiconductor industry to reduce packaging and test cost. However, a large number of wafer probe contacts leads to higher yield loss. Therefore, it is desirable that the number of chip pins contacted by tester channels during wafer sort be kept small to reduce the yield loss resulting from improper contacts. Since test time and the number of contacted chip pins are major practical constraints for wafer sort, not all scan-based digital tests can be applied to the die-under-test. We propose an optimization framework that addresses test access mechanism (TAM) optimization and test-length selection for wafer-level testing of core-based digital SoCs. The objective here is to design a TAM architecture and determine test-lengths for the embedded cores such that the overall SoC defect screening probability at wafer sort is maximized. Defect probabilities for the embedded cores, obtained using statistical yield modeling, are incorporated in the optimization framework. Simulation results are presented for five of the ITC'02 SoC Test benchmarks.
Examining RFID applications in supply chain management
Authors: Fred Niederman, Richard G. Mathieu, Roger Morley, Ik-Whan Kwon
Venue: Communications of the ACM (2007)

Technology infrastructure, business process, and managerial issues must be addressed by IT practitioners as they adapt to the business changes associated with the diffusion of RFID technology in the supply chain.
Generic device description for complex HART field devices
Authors: F. Y. Zulkifli
Venue: Proceedings of the The 8th International Conference on Communication Systems - Volume 02 (2002)

With increasing technology, more complex highway addressable remote transducer (HART) field devices have been developed with flexible cores. This paper discusses the development of a basic generic device description (DD) with a flexible core for HART field devices which is suitable for both the Simatic PDM and HART Communicator. This paper also shows the test results of the DD with a level monitoring device. The tests are made with the device using the Simatic PDM and HART Communicator to ensure a correct and complete user interface.
Lossless and Near-Lossless Audio Compression Using Integer-Reversible Modulated Lapped Transforms
Authors: Henrique S. Malvar
Venue: Proceedings of the 2007 Data Compression Conference (2007)

We present a simple lossless audio codec, composed of an integer-reversible modulated lapped transform (MLT) followed by a backward-adaptive run-length/Golomb-Rice (RLGR) encoder. Its compression performance matches those of state-of-the-art predictive codecs, and it has the advantage that its compressed bitstream contains frequency-domain data that can be used for applications such as search, identification, and visualization. Its compression gain can be improved through a novel data model based on cross-block smoothed spectral magnitude estimates. Its bitstream can be transcoded into a lossy format, for transfers to portable players, at about twice the speed of other codecs. The codec also supports a near-lossless mode, which allows for an extra factor of two in compression without noticeable distortions.
Multiscale Simulations of Quantum Structures
Authors: J. Bernholc, M. Buongiorno Nardelli, W. Lu, V. Ranjan, S. Wang, L. Yu
Venue: Proceedings of the HPCMP Users Group Conference (2006)

Recent advances in theoretical methods and parallel supercomputing allow for reliable ab initio simulations of the properties of complex materials. We describe two current applications: (i) negative differential resistance (NDR) in self-assembled monolayers of ferrocenyl-alkanethiolate on a gold surface, and (ii) interface bonding in polymer/ceramic nanocomposites. Our non-equilibrium Green's function calculations show that electron transport through ferrocenyl-alkanethiolate exhibits strong NDR features at both positive and negative biases, in good agreement with the experimental data. The results suggest that the ferrocenyl group acts like a quantum dot and that the NDR features are due to resonant coupling between the HOMO and the density of states of gold leads. Tuning of the "strength of the NDR and its implication for the design of molecular devices are also discussed. For polymer/ceramic nanocomposites, we show that direct attachment of alkane chains to ceramic surfaces is not energetically favorable, while silanated chains attach through a bridging OH group with an energy gain.
Agent-driven distributed-manufacturing model for mass customisation
Authors: Yoseba K. Penya, Alexei Bratoukhine, Thilo Sauter
Venue: Integrated Computer-Aided Engineering (2003)

Mass-customized production systems are challenging in that they intend to provide custom-specific products at the price of conventional mass production. Since this also includes small production volumes, the manufacturing systems must achieve flexibility, easy reconfigurability, and a totally product-oriented approach. In this paper, we introduce a flexible-automation model developed within the scope of the European Union-funded PABADIS project (Plant Automation Based on Distributed Systems) that meets these requirements by combining Plug-and-Participate technology with software agents.
CSIDC-challenges and choices [computing competitions]
Authors: A. Clements
Venue: Proceedings of the Frontiers in Education Conference, 2001. 31st Annual - Volume 02 (2001)

In 1999 the IEEE Computer Society ran its first International Design Competition, called CSIDC (Computer Society International Design Competition). Typical computing competitions give individual students a problem and expect the contestants to solve them in a few hours. A group of Computer Society members got together to design a new student competition that better reflects the activities students will perform when they graduate. The Computer Society International Design Competition is unusual because it stresses team activity over a relatively long four-month period. All teams taking part in the first CSIDC were given a project kit consisting of hardware and software. Teams had to use this kit to specify, design, construct, document, and test an Internet-based system over a four-month period. The first year of CSIDC was a success and ten teams of students from eight countries took part in the World Finals in Washington, DC. This paper discusses the philosophy of the CSIDC competition, its use of state-of-the-art technology, the provision of a "level-playing field" for all teams, and the mechanisms adopted to provide a fair distribution of competing teams from around the world. However, CSIDC is a very complex and expensive competition to stage. We also look at the feedback from the first cohort of participants and discuss some of the problems the competition faces in terms of its scalability. 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
Subtleties in tolerating correlated failures in wide-area storage systems
Authors: Suman Nath, Haifeng Yu, Phillip B. Gibbons, Srinivasan Seshan
Venue: Proceedings of the 3rd conference on Networked Systems Design & Implementation - Volume 3 (2006)

High availability is widely accepted as an explicit requirement for distributed storage systems. Tolerating correlated failures is a key issue in achieving high availability in today's wide-area environments. This paper systematically revisits previously proposed techniques for addressing correlated failures. Using several real-world failure traces, we qualitatively answer four important questions regarding how to design systems to tolerate such failures. Based on our results, we identify a set of design principles that system builders can use to tolerate correlated failures. We show how these lessons can be effectively used by incorporating them into IrisStore, a distributed read-write storage layer that provides high availability. Our results using IrisStore on the PlanetLab over an 8-month period demonstrate its ability to withstand large correlated failures and meet preconfigured availability targets.
Deploying Video-on-Demand Services on Cable Networks
Authors: Matthew S. Allen, Ben Y. Zhao, Rich Wolski
Venue: Proceedings of the 27th International Conference on Distributed Computing Systems (2007)

Efficient video-on-demand (VoD) is a highly desired service for media and telecom providers. VoD allows subscribers to view any item in a large media catalog nearly-instantaneously. However, systems that provide this services currently require large amounts of centralized resources and significant bandwidth to accommodate their subscribers. Hardware requirements become more substantial as the service providers increase the catalog size or number of subscribers. In this paper, we describe how cable companies can leverage deployed hardware in a peerto- peer architecture to provide an efficient alternativeWe propose a distributed VoD system, and use real measurements from a deployed VoD system to evaluate different design decisions. Our results show that with minor changes, currently deployed cable infrastructures can support a video-on-demand system that scales to a large number of users and catalog size with low centralized resources.
Fast algorithm for 2-D image moments via the Radon transform
Authors: Tak-Wai Shen
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 03 (1996)

A fast algorithm for the computation of the two-dimensional image moments is proposed. In our approach, a new discrete Radon transform (DRT) is used for the major part of the algorithm. The new DRT preserves an important property of the continuous Radon transform that the regular or geometric moments can be directly obtained from the projection data. With this property, the computation of a two-dimensional (2-D) image moments can be decomposed as a number of one-dimensional (1-D) ones, hence greatly reducing the computational complexity. Comparisons of the computational complexity and performance with some known methods are also given. It is shown that the proposed algorithm significantly reduces the complexity and computation time.
Parafac methods for blind beamforming: multilinear ALS performance and CRB
Authors: X. Liu
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 05 (2000)

Low-rank trilinear and quadrilinear decomposition is shown to underlie the basic model for deterministic blind beamforming (DBB) in the presence of incoherent multipath with small delay spread. Quadrilinear regression is proposed for simultaneously estimating all model parameters and compared to the column span method of van der Veen (1998). A derivation and discussion of pertinent Cramer-Rao bounds for the trilinear model, and comparison of trilinear regression performance to the CRB are also included. These are of interest beyond the application scope of this paper.
Virtual Performance Experiment of a Centrifugal Pump
Authors: Shujia Zhang, Baolin Zhu, Qingbo Hu, Xianhua Li
Venue: Proceedings of the 16th International Conference on Artificial Reality and Telexistence--Workshops (2006)

Using multiple reference frame and standard k -\varepsilonmodel, Virtual performance experiment of a standard centrifugal pump is performed with a commercial software package, FLUENT. From the simulation result, a detailed situation of the flow in the pump is visualized, including the pressure distributions and velocity distributions. The performance curve is also drawn from the simulation result. By contrast, the simulated performance curves have a good agree with the experiment performance curves, especially at the normal flow rate situation.
Minimum Completion Time Criterion for Parallel Sparse Cholesky Factorization
Authors: Wen-Yang Lin, Chuen-Liang Chen
Venue: Proceedings of the 1993 International Conference on Parallel Processing - Volume 03 (1993)

It is well known that a judicious choice of ordering has great impact on the sparse matrix factorization. Many proposed reordering algorithms attempt to minimize the corresponding elimination tree height, which is, however, not an accurate indication of the actual parallel factorization time. We will illustrate the appalling discrepancy with a contrived example.