ppxscal/embedding_network huggingface dataset:
Analyzing Knowledge Transfer Effectiveness--An Agent-Oriented Modeling Approach
Authors: Markus Strohmaier, Eric Yu, Jennifer Horkoff, Jorge Aranda, Steve Easterbrook
Venue: Proceedings of the 40th Annual Hawaii International Conference on System Sciences (2007)

Facilitating the transfer of knowledge between knowledge workers represents one of the main challenges of knowledge management. Knowledge transfer instruments, such as the experience factory concept, represent means for facilitating knowledge transfer in organizations. As past research has shown, effectiveness of knowledge transfer instruments strongly depends on their situational context, on the stakeholders involved in knowledge transfer, and on their acceptance, motivation and goals. In this paper, we introduce an agent-oriented modeling approach for analyzing the effectiveness of knowledge transfer instruments in the light of (potentially conflicting) stakeholders' goals. We apply this intentional approach to the experience factory concept and analyze under which conditions it can fail, and how adaptations to the Experience Factory can be explored in a structured way.
A new framework for engineering science education
Authors: D. E. Richards
Venue: Proceedings of the 28th Annual Frontiers in Education - Volume 03 (1998)

The purpose of this paper is to describe a new framework for engineering science education-a systems and accounting framework. This framework helps students build connections between subjects that are usually perceived by students and often taught by faculty as being totally unconnected. 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
Retention: are students good predictors? [engineering education]
Authors: M. R. Anderson-Rowland
Venue: Proceedings of the Frontiers in Education Conference,1997. on 27th Annual Conference. Teaching and Learning in an Era of Change. - Volume 01 (1997)

The retention rates of engineering students, in general, are much lower than they should be. Of particular concern is the fact that women and underrepresented minorities are not only recruited in small numbers, but their retention rates are also low. Research has shown that there are many actions that can be done to help retain students. In order to better understand students and to design intervention programs that would improve their retention, the authors surveyed students enrolled in the ECE 100 class (Introduction to Engineering Design) at the end of the Fall 95 semester. The survey requested demographic data, reasons why engineering was chosen, recruitment participation and evaluation, and predictions about the student's academic future and success. College of Engineering and Applied Sciences (CEAS), Arizona State University, USA, students were asked to give their best guess about their chances of graduating from the CEAS and of failing one or more classes. The results of the survey showed that students were quite good at predicting that they would likely be leaving the CEAS and whether they would fail at least one course. Men were more confident of graduating from CEAS than women.
Implementation and evaluation of moderate parallelism in the BIND9 DNS server
Authors: Tatuya Jinmei, Paul Vixie
Venue: Proceedings of the annual conference on USENIX '06 Annual Technical Conference (2006)

Suboptimal performance of the ISC BIND9 DNS server with multiple threads is a well known problem. This paper explores practical approaches addressing this long-standing issue. First, intensive profiling identifies major bottlenecks occurring due to overheads for thread synchronization. These bottlenecks are then eliminated by giving separate work areas with a large memory pool to threads, introducing faster operations on reference counters, and implementing efficient reader-writer locks. Whereas some of the solutions developed depend on atomic operations specific to hardware architecture, which are less portable, the resulting implementation still supports the same platforms as before through abstract APIs. The improved implementation scales well with up to four processors whether it is operating as an authoritative-only DNS server, with or without dynamic updates, or as a caching DNS server. It also reduces the memory footprint for large DNS databases. Acceptance of this new sever will also have a positive side effect in that BIND9, and its new features such as DNSSEC, should get wider acceptance. The direct result has other ramifications: first, the better performance at the application level reveals a kernel bottleneck in FreeBSD; also, while the results described here are based on our experience with BIND9, the techniques should be applicable to other thread-based applications.
2D mesh-based detection and representation of an occluding object for object-based video
Authors: M. H. Gokcetekin
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 04 (2000)

In this study, an algorithm for mesh-based detection of occlusion caused by a newly entering object into the scene, which covers the information present in the current frame, and mesh-based representation of it is proposed. A 2D Delaunay triangulated dynamic mesh is initially designed on the first frame of the sequence. The motion of each node is then compared to its average motion. Frames with nodes of high activity, with different directions and forming a region are selected to be analyzed for detection of newly entering object(s) into the scene. A region formed by detection of bad motion vectors is enlarged using a distance criterion. The detected frame and the preceding one are range filtered, The luminance components of these two frames are formed. The difference of the range filtered frames and of their respective luminance components are taken into account. The differences are checked with respect to a threshold value inside the formed region. Pixels exceeding this threshold form the newly entering object. Since there may be separate regions formed by these pixels, mesh-based merging of these regions is then accomplished. The detected newly entering object is then meshed and tracked as a new object in the scene in accordance with the occluded object. The proposed 2D mesh-based occlusion detection and representation method can be applied in object-based video coding, storage and manipulation.
A Levinson-like fast algorithm for solving block-slanted Toeplitz systems of equations arising in wavelet-based solution of integral equations
Authors: R. R. Joshi
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 03 (1996)

The Krein integral equation of one-dimensional inverse scattering, which has a symmetric Toeplitz kernel, is transformed using wavelets into a "block-slanted Toeplitz" system of equations. The kernel of the integral equation does not satisfy the Calderon-Zygmund conditions and as a result, application of the wavelet transform to the integral equation does not yield a sparse system matrix. There is therefore a need for a fast algorithm which directly exploits the (symmetric block-slanted-Toeplitz) structure of the system matrix and does not rely on sparsity. The first such O(N/sup 2/) algorithm is presented.
Stationary partitions in 2D nonstationary processes: nondyadic anisotropic Malvar's decomposition and two-dimensional spectral distance tree
Authors: C. Fernandez-Maloigne
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 04 (2000)

In this article, we propose a simple algorithm allowing the research of stationary partitions in locally stationary 2D processes, by use of adapted local bases like the local 2D DCT. The algorithm aims at finding some windows for which the width is adapted to the rate of change in the 2D spectrum. For this, we define an anisotropic Malvar's decomposition with a weak complexity and we propose a robust estimation of the difference in spectra, based on a denoising of the 2D log-periodogram with the help of the undecimated wavelet transform. Then, we consider the "symmetrical case" in the best partition selection method and a post-treatment that permits us to deal with the 2D nonuniform partitions is introduced. Our algorithm obtains better results than the classical Malvar's decomposition. It must be considered as a first treatment, which selects a global segmentation.
Enabling seamless mobility: an enablers, experiences and tools perspective
Authors: Jonathan Engelsma
Venue: ACM SIGPLAN Notices (2007)

Seamless mobility entails providing consumers an enhanced experience -- with reduced effort -- as they move between different devices and environments. Because of the increasing diversity of user preferences, device capabilities and environmental conditions, engineering efficient and usable seamless mobility solutions can be quite challenge. This talk will present an applications research perspective on realizing seamless mobility, focusing on ongoing research in developing enablers for mobile gaming, device-to-device interactions, sensing, advertising and cross-device context sharing. Understanding the device limitations as well as the user expectations of the technology is critical to developing seamless mobility solutions that are both useful and commercially viable. From the tools and development perspective, we see opportunities and challenges in the four phases of realization -- design & development, deployment, usage and evolution. This talk will conclude with a look at existing support for tools and enablers for seamless mobility, and a discussion on future research directions for the developer community.
Improving the performance of a small microphone array at low frequencies using critical band and LPC codebooks
Authors: Yuchang Cao
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 02 (2000)

This paper presents a novel method for improving the low frequency performance of a microphone array by use of a twin codebook consisting of critical band energy and LPC distribution of speech. A modified Wiener filter created using these codebooks eliminates residual noise at low frequencies, which may result from the limitation of the array size or the beamforming algorithm. The preliminary simulation tests have shown that the proposed system is effective, and may provide good performance for those microphone array systems which are installed on a computer in an office, or in a moving vehicle.
Robust OFDM transmissions over frequency-selective channels with multiplicative time-selective effects
Authors: A. Scaglione
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 05 (2000)

OFDM systems enable simple and effective schemes to mitigate frequency-selective fading channels. However, they are extremely sensitive to multiplicative fluctuations induced by time-varying multipath delays, carrier offsets and oscillators phase noise. Although the duration of OFDM symbols is chosen smaller than the channel coherence time to avoid, or reduce, channel time variations, this choice limits system efficiency. In this paper, we propose a generalized OFDM scheme capable of estimating and then compensating channel frequency selectivity and multiplicative noise effects using a deterministic method that exploits the redundancy added to the transmitted sequence in the form of pilot tones and null guard intervals in the frequency domain. The proposed method applies to channels modeled as the cascade of dispersive filters whose output is corrupted by both additive and multiplicative noise.
Energy and execution time analysis of a software-based trusted platform module
Authors: Najwa Aaraj, Anand Raghunathan, Srivaths Ravi, Niraj K. Jha
Venue: Proceedings of the conference on Design, automation and test in Europe (2007)

Trusted platforms have been proposed as a promising approach to enhance the security of general-purpose computing systems. However, for many resource-constrained embedded systems, the size and cost overheads of a separate Trusted Platform Module (TPM) chip are not acceptable. One alternative is to use a software-based TPM (SW-TPM), which implements TPM functions using software that executes in a protected execution domain on the embedded processor itself. However, since many embedded systems have limited processing capabilities and are battery-powered, it is also important to ensure that the computational and energy requirements for SW-TPMs are acceptable. In this work, we perform an evaluation of the energy and execution time overheads for a SW-TPM implementation on a Sharp Zaurus PDA. We characterize the execution time and energy required by each TPM command through actual measurements on the target platform. In addition, we also evaluate the overheads of using SW-TPM in the context of various end applications, including trusted boot of the Linux operating system (OS), secure file storage, secure VoIP client, and secure web browser. Furthermore, we observe that for most TPM commands, the overheads are primarily due to the use of 2048-bit RSA operations that are performed within SW-TPM. In order to alleviate SW-TPM overheads, we evaluate the use of Elliptic Curve Cryptography (ECC) as a replacement for the RSA algorithm specified in the Trusted Computing Group (TCG) standards. Our experiments indicate that this optimization can significantly reduce SW-TPM overheads (an average of 6.51X execution time reduction and 6.75X energy consumption reduction for individual TPM commands, and an average of 10.25X execution time reduction and 10.75X energy consumption reduction for applications). Our work demonstrates that ECC-based SW-TPMs are a viable approach to realizing the benefits of trusted computing in resource-constrained embedded systems.
Filter design for CWT computation using the Shensa algorithm
Authors: Y. T. Chan
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 03 (1999)

Direct computation of the continuous wavelet transform (CWT) using FFT requires O (Nlog/sub 2/N) operations per scale, where N is the data length. The Shensa (1992) algorithm is a fast algorithm to compute the CWT that uses only O(N) operations per scale. The application of the algorithm requires the design of a bandpass and a lowpass filter for a given mother wavelet function. Previous design method involves multi-dimensional numerical search and is computationally intensive. This paper proposes an iterative method to design the optimum filters. It computes in each iteration least-squares solutions only and does not need numerical search. The proposed filter design method is corroborated by simulations.
Providing More Customized Services for Online Games Using Service Oriented Architecture and Three-Tier Views: A Case Study "Mankind"
Authors: Alan Y. S. Chiang, Dickson K. W. Chiu, Patrick C. K. Hung, Yi Zheng
Venue: Proceedings of the 21st International Conference on Advanced Information Networking and Applications Workshops - Volume 02 (2007)

Massive multiplayer online (MMO) is a new trend for players and various game companies are rushing towards this area. As Web services technology is gaining popularity, the convenience of various platforms interacting via the Internet is becoming more readily available. Game companies that have not harnessed the use of Web services for their benefit should realize the opportunity and potential advantages of this trend. As such, this paper studies the requirements and possible approaches using Mankind, a game supported by O2 Online Entertainment Limited (O2oe). We also study the application of a three-tier view-based approach to adapting mobile services for games. With this extension, players can use Web browsers on personal computers as well as handheld devices (such as mobile phones and PDAs) anytime anywhere to access services of games. We also demonstrate how instructions are sent by using players' wireless devices, with examples of high-level mapping from the game databases, samples of XML code, and wireless interaction.
Enabling Wide-Area Service Oriented Architecture through the p2pWeb Model
Authors: Ruben Mondejar, Pedro Garcia, Carles Pairot, Antonio F. Gomez Skarmeta
Venue: Proceedings of the 15th IEEE International Workshops on Enabling Technologies: Infrastructure for Collaborative Enterprises (2006)

In this paper we present the p2pWeb service oriented architecture (SOA). The p2pWeb model offers decentralized solutions for service description, publication, discovery and availability, following the web services standards. The three innovative contributions in p2pWeb SOA are: easy integration of web services into a p2pWeb network, secure and decentralized web services deployment, and transparent location, load balancing and fault-tolerance peer-to-peer mechanisms. We believe that all the features our p2pWeb model offers can be of special interest for the creation of communities, and for the development of future collaborative decentralized applications.
Compartmented Security for Browsers - Or How to Thwart a Phisher with Trusted Computing
Authors: Sebastian Gajek, Ahmad-Reza Sadeghi, Christian Stuble, Marcel Winandy
Venue: Proceedings of the The Second International Conference on Availability, Reliability and Security (2007)

Identity theft through phishing attacks has become a major concern for Internet users. Typically, phishing attacks aim at luring the user to a faked web site to disclose personal information. Existing solutions proposed against this kind of attack can, however, hardly counter the new generation of sophisticated malware phishing attacks, e.g., pharming Trojans, designed to target certain services. This paper aims at making the first steps towards the design and implementation of a security architecture that prevents both classical and malware phishing attacks. Our approach is based on the ideas of compartmentalization for isolating applications of different trust level, and a trusted wallet for storing credentials and authenticating sensitive services. Once the wallet has been setup in an initial step, our solution requires no special care from users for identifying the right web sites while the disclosure of credentials is strictly controlled. Moreover, a prototype of the basic platform exists and we briefly describe its implementation.
Implementing Compact Tactile Display for Fingertips with Multiple Vibrotactile Actuator and Thermoelectric Module
Authors: Tae-Heon Yang, Gi-Hun Yang, Dong-Soo Kwon, Sung-Chul Kang
Venue: Proceedings of the Second Joint EuroHaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (2007)

In this paper, a compact tactile display which consists of multiple vibrotactile actuators with 4- different vibrotactile unbalanced mass and a peltier thermoelectric module is proposed. By stimulating 2 different sensory modalities including mechanoreceptors and thermo-receptor simultaneously, surface texture and material composition can be displayed using the implemented device. With this implementing concept, the developed device can be used to display surface texture and temperature together, and it has the possibility of implementing a small-size, multifingered tactile display device.
A Stakeholder Negotiation Process for Deriving COTS Evaluation Criteria
Authors: Jesal Bhuta, Hasan Kitapci
Venue: Proceedings of the Sixth International IEEE Conference on Commercial-off-the-Shelf (COTS)-Based Software Systems (2007)

Several COTS evaluation processes such as those in [4] and [7] utilize a weighted aggregation (or a similar) method to evaluate COTS products' functional and nonfunctional capabilities. The weighted aggregation method uses Ó (COTS score * weight of the criteria) to score COTS products relative to each other. However, so far there is little literature that guides users in weighting the evaluation criteria and scoring COTS products on these criteria. In [2] and [3] authors have presented a stakeholder-driven process that is used to elicit stakeholder Win conditions, which can then transformed into prioritized requirements [1][5]. In this poster we present a tailored version of such a stakeholder-driven process that can be applied in the COTS context to define a weighted COTS evaluation criteria as well as a scale for scoring COTS products.
Setting up Architect Team
Authors: Poornachandra Sarang
Venue: Proceedings of the Sixth Working IEEE/IFIP Conference on Software Architecture (2007)

An in-house architecture team helps the organizations in meeting the challenges of the ever-changing IT industry. The paper after briefly discussing the importance of architecture describes the desired structure for an architect team and defines the roles and responsibilities of the various team members. The paper defines the expectations from the organization during the team building process and suggests the required investments and the time lines for setting up the team.
A statistical approach to threshold selection in temporal video segmentation algorithms
Authors: Y. Altunbasak
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 04 (2000)

Almost all temporal video segmentation algorithms employ thresholds. Although the selection of thresholds considerably affects the algorithm performance a framework to choose them effectively does not exist. This paper introduces a framework for selecting statistically optimal thresholds in temporal video segmentation algorithms. Statistics for various temporal video events, such as shot boundary, zoom and pan events, are collected. Then, optimal thresholds are estimated so as to minimize a statistical cost function defined in terms of the complied statistics. Results with several real video sequences containing over 150,000 frames show improvements ranging from 5%-20% in true detection and false alarm rates.
On Exploring Complex Relationships of Correlation Clusters
Authors: Elke Achtert, Christian Bohm, Hans-Peter Kriegel, Peer Kroger, Arthur Zimek
Venue: Proceedings of the 19th International Conference on Scientific and Statistical Database Management (2007)

In high dimensional data, clusters often only exist in arbitrarily oriented subspaces of the feature space. In addition, these so-called correlation clusters may have complex relationships between each other. For example, a correlation cluster in a 1-D subspace (forming a line) may be enclosed within one or even several correlation clusters in 2- D superspaces (forming planes). In general, such relationships can be seen as a complex hierarchy that allows multiple inclusions, i.e. clusters may be embedded in several super-clusters rather than only in one. Obviously, uncovering the hierarchical relationships between the detected correlation clusters is an important information gain. Since existing approaches cannot detect such complex hierarchical relationships among correlation clusters, we propose the algorithm ERiC to tackle this problem and to visualize the result by means of a graph-based representation. In our experimental evaluation, we show that ERiC finds more information than state-of-the-art correlation clustering methods and outperforms existing competitors in terms of efficiency.