ppxscal/embedding_network huggingface dataset:
The Design of a Storage Architecture for Mobile Heterogeneous Devices
Authors: Glenford Mapp, Dhawal Thakker, David Silcott
Venue: Proceedings of the Third International Conference on Networking and Services (2007)

Mobile computing devices such as smart PDAs and ultra-light laptops with several networking interfaces are becoming commonplace. The provision of networked data storage facilities will greatly extend their use. This paper looks at the design of a storage architecture for such devices. A two-level structure is proposed in which one component, the mobile memory cache (MMC), moves when the node is mobile. A prototype MMC was designed and evaluated. Preliminary results are presented which show that the system should be able to provide a high-performance service.
My-Pet-and-Her-Friends: Identifying Educational Roles of Animal Companions in Game-based Learning Environment
Authors: Zhi-Hong Chen, Calvin C. Y. Liao, Tak-Wai Chan
Venue: Proceedings of the The First IEEE International Workshop on Digital Game and Intelligent Toy Enhanced Learning (2007)

Virtual characters simulated by computers have been a subject for research and development in both Artificial Intelligence in Education (AIED) and video game design. Between AIED and video games there is an emerging enterprise, that is, virtual characters in video learning game design. This paper proposes a Profile-Driven-Interaction (PDI) framework which borrows the design experience of virtual characters from AIED research to that for video learning games. The PDI framework enables virtual characters to take roles for various educational purposes based on the learner model of that learner and learner models of other learners. These virtual characters are designed in such a way that when they interact with a learner, the learner is actually improving her learning status. Based on this framework, a video learning game, called My-Pet-and-Her-Friends, is developed to address some relevant issues in the learning process, in particular, the issues of engagement and reflection of the learner.
Techniques for Selecting and Manipulating Object in Virtual Environment Based on 3-DOF Trackers and Data Glove
Authors: Yingzhen Liu, Gang Wan
Venue: Proceedings of the 16th International Conference on Artificial Reality and Telexistence--Workshops (2006)

We design and implement virtual object selection and manipulation in VE using 3-DOF trackers and data glove, including ray-casting technique using 1 tracker and 1 data glove and go-go technique using 2 trackers and 1 data glove. The cost of these techniques is reduced because they both do not need the 6-DOF tracker that must be operated in a well-prepared environment. User can grab and release virtual object by simple movement of hand and the interaction is more natural since the mouse is replaced by data glove.
Fractal PN signals for broadband communications: Interpolation functions and PN wavelets
Authors: G. C. Freeland
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 03 (1996)

There has been much interest recently in alternative methods of providing spread spectrum communications through the use of novel modulating carriers such as nonlinear chaotic signals, and localized wavelet and multirate filters. This paper presents research extending recent studies undertaken by the authors into the provision of CDMA spread spectrum through the use of iterated function system (IFS) or alternatively, multiscale difference equation (MSDE) defined pseudo-noise (PN) functions. While such equations are already important in the construction of wavelets and other models for signal coding and representation, here we are concerned with their ability to construct pseudo-random functions for use as broadband CDMA modulation signatures. Concentrating on fractal interpolation functions (FIF), we show how their construction can be written in terms of a Markov shift system and use this to qualify a proposed whitening procedure, and apply them as CDMA signatures. We subsequently use these functions in the construction of PN scaling functions and orthogonal wavelets.
Indoor Navigational Aid System for the Visually Impaired
Authors: M. Sarfraz, S. M. Ali J. Rizvi
Venue: Proceedings of the Geometric Modelling and Imaging (2007)

A navigation aid system provides additional help to a visually impaired person in navigation. It helps to move in a given environment with certain level of confidence in the absence of own visual ability. Using cane, or pet dog are conventional ways of navigational aid. Researchers have recently developed navigational aid systems based on various computer technologies. For example Radio-Frequency Identification tags, Global Positioning System, Geographical Information System, and Vision-to-Sound systems using sensory substitution. These innovative approaches provide beneficial systems but are tied to some limitation. Dependence upon installed hardware devices, remote information server, GPS signal are some of the limitations faced by the existing contemporary research in navigational aid systems. We propose to develop a computer vision based system that would use camera vision input and text-tospeech synthesized output to provide navigation aid. It will be independent from any remote factors and will have the inherent characteristic of improvement with further advancements in computer vision.
Experiences of Using Pair Programming in an Agile Project
Authors: Jari Vanhanen, Harri Korpi
Venue: Proceedings of the 40th Annual Hawaii International Conference on System Sciences (2007)

The interest in pair programming (PP) has increased recently, e.g. by the popularization of agile software development. However, many practicalities of PP are poorly understood. We present experiences of using PP extensively in an industrial project. The fact that the team had a limited number of high-end workstations forced it in a positive way to quick deployment and rigorous use of PP. The developers liked PP and learned it easily. Initially, the pairs were not rotated frequently but adopting daily, random rotation improved the situation. Frequent rotation seemed to improve knowledge transfer. The driver/navigator roles were switched seldom, but still the partners communicated actively. The navigator rarely spotted defects during coding, but the released code contained almost no defects. Test-driven development and design in pairs possibly decreased defects. The developers considered that PP improved quality and knowledge transfer, and was better suited for complex tasks than for easy tasks.
Multilevel design validation in a secure embedded system
Authors: D. D. Hwang, Shenglin Yang, I. Verbauwhede, P. Schaumont
Venue: Proceedings of the High-Level Design Validation and Test Workshop, 2005. on Tenth IEEE International (2005)

We present a simulation-based methodology to support secure embedded design. The methodology is explained through a case study, the Thumbpod-2 portable embedded fingerprint authenticator. By using multilevel validation, we can observe the flow of sensitive information through the system as it takes on multiple forms, from software variables to hardware bus-signals. This allows shielding off of unwanted side-channel information leaks at the protocol, software, or hardware level. We discuss how the ThumbPod-2 design is partitioned into a side-channel-free implementation, and how a codesign environment called GEZEL is used to validate this partitioning process at each abstraction level.
A new role for microcontroller courses: integrating EE curricula
Authors: J. S. Mayer, T. N. Jackson, M. E. Lockley
Venue: Proceedings of the Frontiers in Education Conference on 1995. Proceedings., 1995 vol 1. - Volume 01 (1995)

A new electrical engineering (EE) course on microcontrollers has been developed at Penn State. This new course differs from previously required computer engineering (CMPEN) courses on microprocessors or computer organization in several important respects. Among the differences are the addition of a hardware laboratory and changes in the relative emphasis on computer organization, programming and interfacing. More importantly, the course has been designed to serve three new purposes: to broaden the vision of the students, to integrate material from throughout the EE curriculum and to provide greater background for general engineering practice. The objective of the new course is to introduce the application of microcontrollers in electronic and electromechanical systems. Accordingly, the course includes a three-hour per week laboratory in which students utilize a commercially available microcontroller for an LCD and keypad-based user/system interface, a digital thermometer; a stepper motor controller; and a dc servo motor controller.
A new method for estimating parameters of a skewed alpha-stable distribution
Authors: S. Maymon
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 06 (2000)

Estimating the parameters of a skewed /spl alpha/-stable distribution calls for estimation of four unknown parameters of the probability density function (PDF): the location parameter, the scale parameter, the characteristic exponent and the skewness parameter. We present cumulative distribution function (CDF) based estimators for either the location parameter, the skewness parameter, or the characteristic exponent. The estimators are simple, consistent and their asymptotic performance is analyzed. Of a particular interest is the new estimator for the skewness parameter which is given in a closed form, as a function of the other parameters. As such, it can be used for reducing the search dimension when joint parameter estimation of a skewed stable distribution is called for.
On-line Dynamic Delay Insertion to Improve Signal Integrity in Synchronous Circuits
Authors: J. Semiao, J. Freijedo, J. J. Rodriguez-Andina, F. Vargas, M. B. Santos, I. C. Teixeira, J. P. Teixeira
Venue: Proceedings of the 13th IEEE International On-Line Testing Symposium (2007)

In this paper, a new methodology is proposed to improve digital circuit signal integrity, in the presence of power-supply voltage (VDD) and temperature (T) variations. The underlying principle of the proposed methodology is to introduce on-line additional tolerance, by dynamically controlling the instant of occurrence of the clock edge trigger driving specific memory cells. On-line, dynamic delay insertion in the clock signal driving such memory cells is performed, according to local VDD and/or T variations, using a Dynamic Delay Buffer (DDB) block. The circuit becomes more tolerant to power line and temperature fluctuations, while maintaining at-speed clock rate. Moreover, when clock frequency reduction becomes unavoidable, the methodology improves signal integrity when the disturbances start to occur, allowing time for the clock generator to react and reduce its frequency. Experimental results based on SPICE simulations for two sequential circuits are used to demonstrate the usefulness of the proposed methodology.
Network Subnetting: An Instance of Technical Problem Solving in Kolb's Experiential Learning Cycle
Authors: Arnold Kamis, Heikki Topi
Venue: Proceedings of the 40th Annual Hawaii International Conference on System Sciences (2007)

How do we model and improve technical problem solving, such as network subnetting? This paper reports an experimental study that tested three hypotheses, two derived from Kolb's experiential learning cycle and one derived from the advance organizer technique. The two hypotheses following Kolb's cycle were supported, and the one based on advance organizers was not supported. The results indicate that solving network subnetting problems starts concrete, becomes more abstract, and ends concrete. The lack of support for advance organizers indicates that they are not a good fit for technical problem solving, or that they need to be designed differently for it. We draw some implications for research and practice. We also call for additional research to extend Kolb's cycle to other knowledge intensive problem solving domains.
Discriminative training of stochastic Markov graphs for speech recognition
Authors: F. Wolfertstetter
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 02 (1996)

This paper proposes the application of discriminative training techniques based on the generalized probabilistic descent (GPD) approach to stochastic Markov graphs (SMGs), a generalization of mixture-state hidden Markov models (HMMs), describing the constraints in the acoustic structure of speech as a graph consisting of nodes, each containing a base function, and a transition network between the nodes. State-specific weights modeling the classification relevance of the corresponding states and a transition weight representing the ratio between transitions and emissions are trained in addition to the standard parameters of the models. The experiments show, that discriminatively trained SMGs outperform discriminatively trained mixture-state HMMs with approximately the same number of parameters.
How Safe is my System?
Authors: J. Borcsok, P. Holub, M. H. Schwarz
Venue: Proceedings of the Second International Conference on Systems (2007)

The standard IEC/EN61508 provides the developer with guidelines to develop and implement safety related systems according to the international standard. The standard supplies qualitative and quantitative criteria to evaluated safety related systems, in order to apply it in safety critical applications. This paper details the criterion Probability of Failure on Demand (PFD). This paper derives the necessary equations and calculates the PFD-values for different system architectures.
Method of the principal informative components for reconstruction problems
Authors: A. Kalyuzhny
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 01 (2000)

A method for the solution of the reconstruction problems of signal processing theory is proposed. The method is based on the series expansion of reconstructing fields in special basis, which is formed from eigenfunctions of Fisher's information operator. These functions, which satisfy certain conditions, are referred to as principal informative components (PIC). It is shown that the proposed method produces a smaller reconstruction error in comparison with earlier known methods. Reconstruction problems for deterministic and random fields are investigated. General expressions for systematic and statistical errors are obtained. Optimal properties of eigenfunctions of Fisher's information operator are derived. Conditions for selection of PIC are given. Relations between the proposed method and both the Karhunen-Loeve expansion and singular value decomposition method are established.
Generalized KKM type theorems in FC-spaces with applications (II)
Authors: Xie Ping Ding
Venue: Journal of Global Optimization (2007)

This paper is a continuum of the preceding paper of author. By applying a coincidence theorem in noncompact FC-space without any convexity structure due to author, a new KKM type theorem is first proved under noncompact setting of FC-spaces. The equivalent relation between the coincidence theorem and the KKM type theorem is also established. As applications of the KKM type theorem, we establish some new existence theorems of solutions for three classes of generalized vector equilibrium problems under noncompact setting of FC-spaces. These theorems improve and generalize many known results in literature.
Interactive presentation: System level power optimization of Sigma-Delta modulator
Authors: Fei Gong, Xiaobo Wu
Venue: Proceedings of the conference on Design, automation and test in Europe (2007)

A new approach to power optimization of the sigma delta modulators was presented based on the modeling of noise performance while deciding its system functions and the sub-circuit specifications. And a system model of a 2nd order modulator with a Matlab algorithm to optimize its power specifications was developed. The system simulation results showed that all specifications were consistent with the expectations well. By using the proposed architecture, a resolution of 16-bit was achieved.
A Novel Approach to the Detection of Cheating in Multiplayer Online Games
Authors: Peter Laurens, Richard F. Paige, Phillip J. Brooke, Howard Chivers
Venue: Proceedings of the 12th IEEE International Conference on Engineering Complex Computer Systems (2007)

Modern online multiplayer games are complex heterogeneous distributed systems comprised of servers and untrusted clients, which are often engineered under considerable commercial pressures. Under these conditions, security breaches allowing clients to employ illegal behaviours have become common; current commercial approaches have limited capabilities for reacting rapidly to such threats. This paper presents an approach to the detection of a cheating player, and describes a proof-of-concept system designed to detect cheating play (specifically wall-hacking) through the analysis of player behaviour. This approach differs from current methods in that it does not rely on knowledge about specific vulnerabilities and their method of exploitation in order to protect the system, but instead monitors player behaviour for indications of cheating play. Statistical evidence is presented which shows that the proof-of-concept correctly distinguishes between most cheating and non-cheating players.
Accelerated Proximity Queries for Haptic Rendering of Deformable Models
Authors: Nico Galoppo, Miguel A. Otaduy, Paul Mecklenburg, Markus Gross, Ming C. Lin
Venue: Proceedings of the Second Joint EuroHaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (2007)

We present a fast proximity query algorithm for haptic display of complex deformable models using a layered representation. Assuming that each solid model can be represented as a rigid core covered by a layer of deformable material, the deformation field of the surface can be expressed as a function in the parametric domain of the rigid core. Our 2-stage collision query algorithm starts by performing an approximate objectspace collision detection between low-resolution polygonal proxies. We then refine the query result by computing a directional penetration depth field using a local height-field representation of the deformable layers to detect the interference between the high-resolution surface geometry. We have developed a proof-of-concept demonstration using commodity graphics processors and been able to perform fast proximity queries between two highly complex deformable models in less than 2 ms.
Applying the Theory of Task-Technology Fit to Mobile Information Systems: The Role of User Mobility
Authors: Judith Gebauer, Ya Tang
Venue: Proceedings of the International Conference on the Management of Mobile Business (2007)

In this paper, we apply the theory of task technology fit to information systems that are used by mobile professionals. We describe the results of an empirical study of 216 users of mobile devices that included various smart phones, personal digital assistants (PDAs), and laptop computers. Our findings suggest that (1) the relationship between task difficulty and functional requirements of the mobile devices is stronger for highly mobile users than for less mobile users; (2) user mobility is associated with increased user-perceived importance of a number of nonfunctional features; and (3) for a number of functions and features, highly mobile users indicated a stronger relationship between task-technology fit, and overall evaluation of the technology. We conclude that user mobility needs to be taken into account when applying the theory of task-technology fit to mobile information systems. In addition, our study provides specific insights about the information system requirements of mobile professionals.
Client behavior and feed characteristics of RSS, a publish-subscribe system for web micronews
Authors: Hongzhou Liu, Venugopalan Ramasubramanian, Emin Gün Sirer
Venue: Proceedings of the 5th ACM SIGCOMM conference on Internet Measurement (2005)

While publish-subscribe systems have attracted much research interest since the last decade, few established benchmarks have emerged, and there has been little characterization of how publish-subscribe systems are used in practice. This paper examines RSS, a newly emerging, widely used publish-subscribe system for Web micronews. Based on a trace study spanning 45 days at a medium-size academic department and periodic polling of approximately 100,000 RSS feeds, we extract characteristics of RSS content and usage. We find that RSS workload resembles the Web in content size and popularity; feeds are typically small (less than 10KB), albeit with a heavy tail, and feed popularity follows a power law distribution. The update rate of RSS feeds is widely distributed; 55% of RSS feeds are updated hourly, while 25% show no updates for several days. And, only small portions of RSS content typically change during an update; 64% of updates involve less than three lines of the RSS content. Overall, this paper presents an analysis of RSS, the first widely deployed publish-subscribe system, and provides insights for the design of next generation publish-subscribe systems.
Patch-based representation of visual speech
Authors: Patrick Lucey, Sridha Sridharan
Venue: Proceedings of the HCSNet workshop on Use of vision in human-computer interaction - Volume 56 (2006)

Visual information from a speaker's mouth region is known to improve automatic speech recognition robustness, especially in the presence of acoustic noise. To date, the vast majority of work in this field has viewed these visual features in a holistic manner, which may not take into account the various changes that occur within articulation (process of changing the shape of the vocal tract using the articulators, i.e lips and jaw). Motivated by the work being conducted in fields of audio-visual automatic speech recognition (AVASR) and face recognition using articulatory features (AFs) and patches respectively, we present a proof of concept paper which represents the mouth region as a ensemble of image patches. Our experiments show that by dealing with the mouth region in this manner, we are able to extract more speech information from the visual domain. For the task of visual-only speaker-independent isolated digit recognition, we were able to improve the relative word error rate by more than 23% on the CUAVE audio-visual corpus.
Aligning Architectural Approaches towards an SOA-Based Enterprise Architecture
Authors: Rakesh Radhakrishnan, Badri Sriraman
Venue: Proceedings of the Sixth Working IEEE/IFIP Conference on Software Architecture (2007)

This tutorial will provide an overview of architecture patterns, approaches, and service oriented architecture (SOA) principles.
An Open Source Environment for Cell Broadband Engine System Software
Authors: Michael Gschwind, David Erb, Sid Manning, Mark Nutter
Venue: Computer (2007)

The Cell Broadband Engine provides the first implementation of a chip multiprocessor with a significant number of general-purpose programmable cores targeting a broad set of workloads. Open source software played a critical role in the development of the Cell software stack.