ppxscal/embedding_network huggingface dataset:
Constant-rate eye tracking and animation for model-based-coded video
Authors: A. M. Al-Qayedi
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 04 (2000)

The eyes comprise an important expressive facial region, making their animation essential for successful communication. The authors report on the performance of a new algorithm for eye tracking and animation based on the empirical observation that the eye blinks at a roughly constant rate. Experiments show that the algorithm achieves a 100% success in emulating the blinks occurring at the encoder. The algorithm conforms with the MPEG-4 SNHC approach in allocating description to objects based on their level of detail within the scene, as well as allowing the eyes to be animated using a downloaded script that is attached to them. The approach is appealing for very low bit-rate applications as it achieves a potential bit-rate saving with good subjective quality.
Open Borders? Immigration in Open Source Projects
Authors: Christian Bird, Alex Gourley, Prem Devanbu, Anand Swaminathan, Greta Hsu
Venue: Proceedings of the 29th International Conference on Software Engineering Workshops (2007)

Open source software is built by teams of volunteers. Each project has a core team of developers, who have the authority to commit changes to the repository; this team is the elite, committed foundation of the project, selected through a meritocratic process from a larger number of people who participate on the mailing list. Most projects carefully regulate admission of outsiders to full developer privileges; some projects even have formal descriptions of this process. Understanding the factors that influence the "who, how and when of this process is critical, both for the sustainability of FLOSS projects, and for outside stakeholders who want to gain entry and succeed. In this paper we mount a quantitative case study of the process by which people join FLOSS projects, using data mined from the Apache web server, Postgres, and Python. We develop a theory of open source project joining, and evaluate this theory based on our data.
A case of new york city high school principals' experiences with multiple accountability pressures and accompanying models for decision-making
Authors: Dorothy Shipps
Venue:  (2006)

This study presents the results of an interview study that asked, "How do principals' experiences with accountability in New York City schools affect the decisions they make about teaching and learning issues?" To explore this question, 10 New York City high school principals were interviewed and asked for critical incidents that would illustrate their experiences with each of the accountabilities in the framework. The principals in this study worked in schools that were varied by size (i.e., <500, &ge;500) and instructional philosophy (i.e., progressive or traditional). Interviews with each principal resulted in 96 critical incidents including 216 examples of accountability pressure. Using a mixed-method construct for data analysis, the critical incidents were analyzed for patterns of response based on two variables: size and instructional philosophy. Also, the data analysis considered principal responses when these variables were combined, resulting in the cases of principals' experiences with multiple accountabilities from the following school types: progressive large schools, progressive small schools, and traditional large schools.The study concludes that while all principals in the study experienced all forms of accountability---political, bureaucratic, market, professional, and moral---outlined in the conceptual framework for this study, there was difference in the frequency of these experiences when the variables of school size and instructional philosophy were considered. Findings suggest that principals of large schools reported more market accountability pressure than principals of small schools. Also, small school principals reported a greater number of experiences with bureaucratic and professional accountability conflict than their counterparts at large schools. When considering school philosophy, the data reveal that progressive school principals reported more moral accountability pressure than their traditional school counterparts. Also presented in this study is a decision situation framework: simple decision, simple conflict, and complex conflict, which evolved from principal reports of incidents where there were multiple accountabilities in support of each other, in conflict with each other, or both. The analysis using this framing indicated that the difference of experiences within each of these situations involving multiple accountabilities was apparent when school size and instructional philosophy were considered.
Minitack Introduction: Advances in Teaching and Learning Technologies
Authors: Eric L. Santanen, David H. Spencer
Venue: Proceedings of the 40th Annual Hawaii International Conference on System Sciences (2007)

The Advances in Teaching and Learning Technologies Minitrack serves as an outlet for research dealing with theories, tools, tool development, enabling platforms, communication media, distance learning, supporting infrastructures, user experiences, research methods, social impacts, and measurable outcomes as they relate to improving teaching and learning. As such, this Minitrack is intended to include all aspects of learning from the original inceptions of theories and tools through the measurement of learning outcomes. Usage environments range from same-time, same-place to anytime, anyplace that increase interactions among the learners and the teachers or facilitators. This is the fourth year of this Minitrack which resulted from the combination of the Asynchronous Learning Networks, Next Generation of Learning Platforms, and Technology Supported Learning Minitracks. The papers this year are organized into three presentation sessions, each focusing on a different aspect of technologies for teaching and learning.
Getters films at wafer level for wafer to wafer bonded MEMS
Authors: M. Moraja, M. Amiotti
Venue: Proceedings of the Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS (2003)

Low cost and reliability are the main important factors for the successful commercialization of MEMs devices. It is possible to decrease the cost of the MEMs device by shifting from ceramic packages down to wafer to wafer bonded MEMs. On the other hand, the ability to maintain the suitable environmental conditions either vacuum or inert gas inside the package of some MEMs devices is the key for assuring high reliability to these MEMs devices. Getter materials are the viable and experienced way to assure long term stability of vacuum in sealed devices. In this paper, we describe the getter solution for wafer to wafer bonded MEMs: it consists of a Si or glass wafer where a getter film is patterned and placed into grooves. This Si or glass wafer with patterned getter film will be the cap wafer of the wafer to wafer bonded MEMs. The getter film is highly porous in order to maximize the sorption performances even at room temperature during the life of the MEMs devices.
Mining Substructures in Protein Data
Authors: Fedja Hadzic, Tharam S. Dillon, Amandeep S. Sidhu, Elizabeth Chang, Henry Tan
Venue: Proceedings of the Sixth IEEE International Conference on Data Mining - Workshops (2006)

In this paper we consider the "Prions' database that describes protein instances stored for Human Prion Proteins. The Prions database can be viewed as a database of rooted ordered labeled subtrees. Mining frequent substructures from tree databases is an important task and it has gained a considerable amount of interest in areas such as XML mining, Bioinformatics, Web mining etc. This has given rise to the development of many tree mining algorithms which can aid in structural comparisons, association rule discovery and in general mining of tree structured knowledge representations. Previously we have developed the MB3 tree mining algorithm, which given a minimum support threshold, efficiently discovers all frequent embedded subtrees from a database of rooted ordered labeled subtrees. In this work we apply the algorithm to the Prions database in order to extract the frequently occurring patterns, which in this case are of induced subtree type. Obtaining the set of frequent induced subtrees from the Prions database can potentially reveal some useful knowledge. This aspect will be demonstrated by providing an analysis of the extracted frequent subtrees with respect to discovering interesting protein information. Furthermore, the minimum support threshold can be used as the controlling factor for answering specific queries posed on the Prions dataset. This approach is shown to be a viable technique for mining protein data.
On-line adapted transition between locomotion and jump
Authors: P. Glardon, R. Boulic, D. Thalmann
Venue: Proceedings of the Computer Graphics International 2005 (2005)

Motion blending is widely accepted as a standard technique in computer animation, allowing the generation of new motions by interpolation and/or transition between motion capture sequences. To ensure smooth and seamless results, an important property has to be taken into account: similar constraints sequences have to be time aligned. But traditional blending approaches let the user choose manually the transition time and duration. In addition, according to the animation context, blending operations should not be performed immediately. They can only occur during a precise period of time, while preserving specific physical properties. We present in this paper an improved blending technique allowing automatic controlled transition between motion patterns whose parameters are not known in advance. This approach ensures coherent movements over the parameter space of the original input motions. To illustrate our approach, we focus on walking and running motions blended with jumps, where animators may vary the jump length and style. The proposed method specifies automatically the support phases of the input motions, and controls on the fly a correct transition time. Moreover the current locomotion type and speed are smoothly adapted given a specific jump type and length.
Stepwise Fair-Share Buffering underneath Bio-inspired P2P Data Dissemination
Authors: Emrah Ahi, Mine Caglar, Oznur Ozkasap
Venue: Proceedings of the Sixth International Symposium on Parallel and Distributed Computing (2007)

We consider buffer management problem in support of large-scale bio-inspired peer-to-peer data dissemination services. Bio-inspired epidemic protocols have considerable benefits as they are robust against network failures, scalable and provide probabilistic reliability guarantees. Coupled with an efficient buffering mechanism, system wide buffer usage can be optimized while providing reliability and scalability in such protocols. We propose a novel algorithm, Stepwise Fair-share Buffering, that provides uniform load distribution in comparison to earlier approaches and reduces the overall buffer usage where every peer has the partial view of the system. We report and discuss the comparative performance results and provide an analytical evaluation of our approach.
Self-Organized Data-Gathering Scheme for Multi-Sink Sensor Networks Inspired by Swarm Intelligence
Authors: Yuichi Kiri, Masashi Sugano, Masayuki Murata
Venue: Proceedings of the First International Conference on Self-Adaptive and Self-Organizing Systems (2007)

We propose a new system of gathering data from sensor network with multi-sink cortfigurations inspired by the swam intelligence of ants. It is a novel solution developed to achieve reliable data gathering over extended periods of time. Each sensor node determines its next action through repeated interaction and feedback from its neighbors. Beneficial clustering and routing emerge in a self-organized way from these actions, and this leads to a robust and dependable data-gathering system. Our simulation results revealed that the proposed system can reliably deliver event information to the sink nodes, Is robust over very-poor-quality wireless channels, and has self-recovery capabilities to deal with failures of sensor nodes including the sink nodes.
A Flexible Fault-Tolerance Mechanism for the Integrade Grid Middleware
Authors: Stanley Araujo de Sousa, Francisco Jose da Silva e Silva, Rafael Fernandes Lopes
Venue: Proceedings of the Third International Conference on Networking and Services (2007)

Computer grids have attracted great attention of both academic and enterprise communities, becoming an attractive alternative for the execution of applications that demand huge computational power, allowing the integration of computational resources spread through different administrative domains. The dynamic nature of the grid infrastructure, its high scalability, and great heterogeneity exacerbates the likelihood of errors occurrence,imposing fault tolerance as a major requirement for grid middlewares. This paper describes a flexible fault-tolerance mechanism implemented on Integrade grid middleware that allows the customization of several fault tolerance parameters and the combination of different fault tolerance techniques. This paper also presents several experiments that measure the benefits of our approach, considering several different execution environments scenarios.
Capture the flag: simulating a location-based mobile game using the wizard-of-oz method
Authors: Regina Bernhaupt, Stefan Jenisch, York Keyser, Manuel Will
Venue: Proceedings of the international conference on Advances in computer entertainment technology (2007)

We present a wizard of Oz framework for the simulation of location-based mobile games. We explore briefly the methodological concept of Wizard of Oz and show, based on a case study, advantages and shortcomings of the method. The case study realized a game called capture-the-flag. We show how such prototypes can be evaluated in a real field trial.
The internet public library: an online learning laboratory for digital libraries
Authors: Lorri Mon, Larry Dennis, Kyunghye Kim
Venue: Proceedings of the 7th ACM/IEEE-CS joint conference on Digital libraries (2007)

This demonstration explores the Internet Public Library (www.ipl.org), a shared online facility for testing innovations in digital libraries and for training a skilled work force in digital library services, systems, and collections. Hypatia 2.0 and QRC software used in IPL's digital library collections and services are shown, with discussion of IPL in education, digital collections, digital reference services, digital library systems, and research.
Adaptive Garbage Collection Mechanism for N-log Block Flash Memory Storage Systems
Authors: Yehua Du, Ming Cai, Jinxiang Dong
Venue: Proceedings of the 16th International Conference on Artificial Reality and Telexistence--Workshops (2006)

Write operations in flash memory should be preceded by erase operations, which take an order of magnitude longer than writes. Therefore an update of a single byte causes an erasing of the whole block as well as restoration of a large amount of data. In order to avoid erasing during every update, non-in-place update schemes have been used. Obsolete data are later recycled by garbage collection. In this paper, we study a new garbage collection algorithm for the N-log block flash memory storage system, to reduce the recycling cost such as the number of erase operations and the number of data copies. The proposed scheme selects the victims according to the age and utilization. And selection algorithm changes dynamically with the I/O workload. Experimental results show that the proposed scheme reduces the extra erase operations greatly.
Application of the majority connectedness carrier for computing the reliability of complex systems
Authors: V. N. Kononenko, R. M. Lozitskii, M. V. Nosov, A. S. Romanov, B. P. Filin
Venue: Automation and Remote Control (2007)

A computational method for probability of majority connectedness of the two-pole network of a random graph is stated when the union of circuits is used as a connectedness carrier of node-poles. Formal rules for calculations of this type illustrated by the corresponding examples are given.
Linuxgym: software to automate formative assessment of unix command-line and scripting skills
Authors: Andrew Solomon
Venue: ACM SIGCSE Bulletin (2007)

This demonstration illustrates the way in which Linuxgym automatically assesses Unix command-line and scripting skills through practical activities. It is shown that the mechanism provides a substantial amount of formative feedback, and that data it accumulates can be coalesced into a report indicating to the teacher topics requiring better coverage.
Video to the rescue
Authors: Girija Chetty, Michael Wagner
Venue: Proceedings of the HCSNet workshop on Use of vision in human-computer interaction - Volume 56 (2006)

Automatic person identity verification based on biometrics is a challenging problem, and has received much attention during recent years due to its many applications in on-line transaction processing, law enforcement, and security applications. However, most identity verification systems are primarily based on voice biometrics, and hence are more vulnerable to acoustic noise and channel distortions, in addition to train/test mismatch conditions. In this paper, we show how we can use video information to improve the performance of identity verification systems. The approach based on multimodal fusion of voice and face information from speaking face video allows robust identity verification performance. In addition, depending on the type of features and fusion technique used, it is also possible to perform liveness checks, allowing the system to detect fraudulent attacks on the system.
Electrothermal compact model of CoolSET voltage regulators for SPICE: Research Articles
Authors: Krzysztof Górecki
Venue: International Journal of Numerical Modelling: Electronic Networks, Devices and Fields (2007)

This paper concerns the problem of modelling CoolSET voltage regulators with self-heating taken into account. The limits of the model of this class of regulators developed by Infineon Technologies AG were analysed. A new electrothermal model of CoolSET regulators designed to analyse transient in the SPICE software was proposed. The correctness of the elaborated model was verified on the example of boost and flyback converters. A good agreement of the measurement and calculation results carried out with the use of a new model was achieved. Copyright &copy; 2007 John Wiley & Sons, Ltd.
Monitoring of Timing Constraints with Confidence Threshold Requirements
Authors: Chan-gun Lee, Aloysius K. Mok, Prabhudev Konana
Venue: IEEE Transactions on Computers (2007)

In many emerging time-critical applications, the exact time of event occurrences may not be known. In such cases, events can be represented as a probabilistic occurrence within a time interval. Thus, monitoring of timing constraints, generally used in time-critical systems, needs to incorporate the uncertainty of event occurrences. In this paper, we propose mechanisms to monitor the satisfaction/violation of timing constraints that can be assessed probabilistically. We assume a uniform distribution of event occurrence within a time interval. Our proposed algorithm determines whether the probability that a timing constraint has been satisfied exceeds a specified threshold value. A confidence threshold is a minimum satisfaction probability of the timing constraint. A timing constraint is violated if the confidence threshold is not reached. We design an efficient monitoring algorithm for detecting timing violations of a set of timing constraints by finding the earliest expiration time (EET) for each timing constraint. Since it is critical to derive implicit constraints for early detection of violation of timing constraints, we present the derivation of the implicit constraints under uncertainty using an all--pairs shortest path algorithm. Further, we propose pruning techniques to discard unnecessary implicit constraints. We present the properties and proofs of our approach.
Context-aware User Interface Framework for Mobile Applications
Authors: Thomas Butter, Markus Aleksy, Philipp Bostan, Martin Schader
Venue: Proceedings of the 27th International Conference on Distributed Computing Systems Workshops (2007)

Mobile devices available today are very heterogenous with regard to their display and input capabilities and used software platform configurations. This leads to a complex development process for applications which have to target a wide range of devices. Adapting the interface of an application to the current context of the user adds another burden to developers, while improving the user experience. Therefore we developed an XUL-based User Interface Framework which eases the development of mobile applications by separating the UI adaption from the application logic and offering portability to different Java ME platform configurations. Using this framework the user interface (UI) adapts itself automatically on context-changes and changes to different screen resolutions or orientations without increasing code complexity for the developers.
Electronic commerce in Denmark: the spread of EDI in business-to-business transactions
Authors: Niels Christian Juul, Kim Viborg Andersen, Niels Bjørn-Andersen
Venue: Proceedings of the 3rd conference on USENIX Workshop on Electronic Commerce - Volume 3 (1998)

The use of EDI in business transactions is considered a prerequisite in turning both private and public business towards electronic commerce in the next century. The national strategy in Denmark has been to promote the usage of EDIFACT-based EDI in both the public and private sector. In our study of EDI-usage in Denmark, we have found this strategy only partially fruitful, so far. We are monitoring the state of EDI usage in Denmark based on VANS, direct proprietary connections, and TCP/IP-based networks to evaluate the governmental actions within the area of EDI. Our study suggests that the governmental initiatives have been successful within the areas vital to the public services and instruments, but lagging in supporting the private sector's need for EDI and lagging in the public sector's own management. Although Internet based EDI is growing, the business-to-business traffic through VANS, primarily using EDIFACT, hasn't been hampered. Throughout the 1995-97 period VANS traffic shows an annual increase of 33% in number of bytes and 46% in number of messages.
Proving Arrow's theorem by PROLOG
Authors: Kenryo Indo
Venue: Computational Economics (2007)

This paper presented a simple PROLOG implementation for Arrow's Social welfare function (SWF). Arrow (Social choice and individual values, Yale University Press, 1963) proved that any SWF which satisfies a set of conditions IIA, Pareto, and unrestricted domain should be dictatorial. The PROLOG program can prove the theorem for 3-alternative 2-agent case. With a minor modification it proves a version of the theorem without the Pareto condition by Wilson (Journal of Economic Theory, 5, 478---486, 1972).
Interactive presentation: Optimizing analog filter designs for minimum nonlinear distortions using multisine excitations
Authors: J. Lataire, G. Vandersteen, R. Pintelon
Venue: Proceedings of the conference on Design, automation and test in Europe (2007)

Nonlinear distortions in submicron analog circuits are gaining importance, especially when power constraints are imposed and when operating in moderate inversion. This paper proposes a method to optimize the design of analog filters for minimum noise and nonlinear distortions. For this purpose a technique is presented for quantifying these nonlinearities, such that their influence can be compared with that of the system noise. Having quantified the nonidealities, an optimization can be carried out which involves the tuning of design parameters.