ppxscal/embedding_network huggingface dataset:
User-defined gestures for surface computing
Authors: Jacob O. Wobbrock, Meredith Ringel Morris, Andrew D. Wilson
Venue: Proceedings of the 27th international conference on Human factors in computing systems (2009)

Many surface computing prototypes have employed gestures created by system designers. Although such gestures are appropriate for early investigations, they are not necessarily reflective of user behavior. We present an approach to designing tabletop gestures that relies on eliciting gestures from non-technical users by first portraying the effect of a gesture, and then asking users to perform its cause. In all, 1080 gestures from 20 participants were logged, analyzed, and paired with think-aloud data for 27 commands performed with 1 and 2 hands. Our findings indicate that users rarely care about the number of fingers they employ, that one hand is preferred to two, that desktop idioms strongly influence users' mental models, and that some commands elicit little gestural agreement, suggesting the need for on-screen widgets. We also present a complete user-defined gesture set, quantitative agreement scores, implications for surface technology, and a taxonomy of surface gestures. Our results will help designers create better gesture sets informed by user behavior.
Intelligate: Scalable Dynamic Invariant Learning for Power Reduction
Authors: Roni Wiener, Gila Kamhi, Moshe Y. Vardi
Venue: Integrated Circuit and System Design. Power and Timing Modeling, Optimization and Simulation: 18th International Workshop, PATMOS 2008, Lisbon, Portugal, September 10-12, 2008. Revised Selected Papers (2009)

In this work we introduce an enhanced methodology to detect dynamic invariants from a power-benchmark simulation trace database. The method is scalable for the application of clock-gating extraction on industrial designs. Our approach focuses upon dynamic simulation data as the main source for detection of opportunities for power reduction. Experimental results demonstrate our ability to learn accurate clock-gating functions from simulation traces and achieve significant power reduction (in the range of 30%-70% of a clock net's power) on industrial micro-processor designs.
Retina: helping students and instructors based on observed programming activities
Authors: Christian Murphy, Gail Kaiser, Kristin Loveland, Sahar Hasan
Venue: ACM SIGCSE Bulletin (2009)

It is difficult for instructors of CS1 and CS2 courses to get accurate answers to such critical questions as "how long are students spending on programming assignments?", or "what sorts of errors are they making?" At the same time, students often have no idea of where they stand with respect to the rest of the class in terms of time spent on an assignment or the number or types of errors that they encounter. In this paper, we present a tool called Retina, which collects information about students' programming activities, and then provides useful and informative reports to both students and instructors based on the aggregation of that data. Retina can also make real-time recommendations to students, in order to help them quickly address some of the errors they make. In addition to describing Retina and its features, we also present some of our initial findings during two trials of the tool in a real classroom setting.
The Clipping Noise and PAPR in the OFDM System
Authors: Kaiyuan Xue, Hongwen Yang, Shenglan Su
Venue: Proceedings of the 2009 WRI International Conference on Communications and Mobile Computing - Volume 01 (2009)

The large peak to average power ratio (PAPR) is widely believed as one of the most critical problem for OFDM systems and a lot of methods have been proposed to reduce PAPR. When OFDM signal passes through a non-linear amplifier, the large PAPR may degrades the performance due to the clipping. In this paper, we show that the clipping noise and PAPR are weakly related when the clipping threshold is low where the impact of clipping is large. However,the popular PAPR reduction schemes are only effective when the threshold is high.
Sustainability Networks: Cognitive Tools for Expert Collaboration in Social-Ecological Systems (Routledge Studies in Ecological Economics), 1st edition
Authors: Janne Hukkinen
Venue:  (2008)

Sustainability is a word that means different things depending on who is using it, thus underlining the potential problems involved in experts from different fields teaming up to tackle sustainability problems. In this book, Janne Hukkinen argues for a reflexive approach to sustainability as a means of coming to grips with the threatening challenges arising out of human-environment interaction. The author illustrates his argument with a case study of natural resource management in Lapland, showing how sustainability is understood holistically by academics and professionals alike.This book reflects an emerging cognitive turn in sustainability sciences, conceptualizing environmental challenges during action on our social and material environments, rather than in isolation. Hukkinen argues that this conceptual blending enables sustainability experts to hybridize themselves: to immerse themselves in the fields of other experts and imagine the other's work - both prerequisites of trans-disciplinary knowledge integration. This book shows how sustainability experts can reveal their intellectual engagements when designing scenarios and indicators and presents a rigorous framework for organizing expert collaboration.
Dynamic test compaction for a random test generation procedure with input cube avoidance
Authors: Irith Pomeranz, Sudhakar M. Reddy
Venue: Proceedings of the 2009 Asia and South Pacific Design Automation Conference (2009)

A recent approach to test generation avoids the assignment of certain input values in order not to prevent target faults from being detected. The test generation process based on this approach is efficient; however, it generates large test sets. We develop a dynamic test compaction procedure for this approach. Our goal is to reduce the test set size by increasing the number of faults detected by each test vector, while keeping the computational complexity as low as that of the original procedure. This is achieved by avoiding the assignment of certain input values in order not to prevent subsets of faults from being detected.
Stick, Click n' Call: self-adhesive pressure-activated RFID tags for mobile phones
Authors: Fabian Hemmert, André Knörig, Gesche Joost, Reto Wettach
Venue: Proceedings of the 3rd International Conference on Tangible and Embedded Interaction (2009)

This paper describes a new interaction concept, which is based on customizable self-adhesive stickers with an integrated button, manufacturable at low cost. By pressing the button, users can execute specialized functionalities on their mobile phones, e.g. dialing phone numbers or accessing URLs. We present three usage scenarios and a proof-of-concept prototype.
Semantically Enabled Framework for User Centric Profile Description, Search and Match
Authors: João Moura, Paulo Chainho, C. V. Damásio
Venue: Service-Oriented Computing - ICSOC 2007 Workshops: ICSOC 2007, International Workshops, Vienna, Austria, September 17, 2007, Revised Selected Papers (2009)

With the advent of User Centric network paradigms like IP Multimedia Subsystem (IMS) and Web 2.0 the user must be able to describe both him self and the contents he produces in an unambiguous way as Service Oriented Architectures (SOA) promotes the emergence of more and more services. The user will be challenged to survive in a wild and wide service ecosystem. In this paper we present the Matcher network functionality that aims to provide guidance to the user in such a rich but complex service ecosystem. The Matcher is a framework not only to allow the user and service providers to produce semantically enabled (user, service and content) profiles and match these profiles, but also to obtain useful results using simple tags and semantically enabled tags - statements.
Electrothermal stability of uniform arrays of one-port elements
Authors: Giancarlo Storti-Gajani, Amedeo Premoli, Angelo Brambilla
Venue: International Journal of Circuit Theory and Applications (2009)

Power electronic elements are often built employing arrays of devices designed to evenly share high currents over a large number of single devices. In some situations, mismatch in current sharing can occur causing temperature differences between elements of the array. These differences can trigger electrothermal instability phenomena and even device destruction. In this paper, we consider the electrothermal dynamic behavior of arrays composed of identical one-port elements. We first introduce a simplified model of the thermal paths and of the elements composing the array that allows the analysis of the behavior of the electrothermal system. Then, we investigate from a mathematical standpoint dynamic effects governing current sharing and possible situations causing hot spots with consequent device destruction. These results are compared with simulations of detailed non-linear models confirming predictions given by the simplified model. Copyright &copy; 2008 John Wiley & Sons, Ltd.
A characterization of cycle-free unit probe interval graphs
Authors: David E. Brown, J. Richard Lundgren, Li Sheng
Venue: Discrete Applied Mathematics (2009)

A graph is a probe interval graph (PIG) if its vertices can be partitioned into probes and nonprobes with an interval assigned to each vertex so that vertices are adjacent if and only if their corresponding intervals overlap and at least one of them is a probe. PIGs are a generalization of interval graphs introduced by Zhang for an application concerning the physical mapping of DNA in the human genome project. PIGs have been characterized in the cycle-free case by Sheng, and other miscellaneous results are given by McMorris, Wang, and Zhang. Johnson and Spinrad give a polynomial time recognition algorithm for when the partition of vertices into probes and nonprobes is given. The complexity for the general recognition problem is not known. Here, we restrict attention to the case where all intervals have the same length, that is, we study the unit probe interval graphs and characterize the cycle-free graphs that are unit probe interval graphs via a list of forbidden induced subgraphs.
Time-completeness trade-offs in record linkage using adaptive query processing
Authors: Roald Lengu, Paolo Missier, Alvaro A. A. Fernandes, Giovanna Guerrini, Marco Mesiti
Venue: Proceedings of the 12th International Conference on Extending Database Technology: Advances in Database Technology (2009)

Applications that involve data integration among multiple sources often require a preliminary step of data reconciliation in order to ensure that tuples match correctly across the sources. In dynamic settings such as data mashups, however, traditional offline data reconciliation techniques that require prior availability of the data may not be applicable. The alternative, performing similarity joins at query time, is computationally expensive, while ignoring the mismatch problem altogether leads to an incomplete integration. In this paper we make the assumption that, in some dynamic integration scenarios, users may agree to trade the completeness of a join result in return for a faster computation. We explore the consequences of this assumption by proposing a novel, hybrid join algorithm that involves a combination of exact and approximate join operators, managed using adaptive query processing techniques. The algorithm is optimistic: it can switch between physical join operators multiple times throughout query processing, but it only resorts to approximate join operators when there is statistical evidence that result completeness is compromised. Our experiments show that sensible savings in join execution time can be achieved in practice, at the expense of a modest reduction in result completeness.
Implementation of Alamouti Encoder Using FPGA for Mimo Testbed
Authors: Mostafa Wasiuddin Numan, Mohammad Tariqul Islam, Norbahiah Misran
Venue: Proceedings of the 2009 International Conference on Advanced Computer Control (2009)

Multiple-input multiple-output (MIMO) is a generic technique that promises to be a strong contender for 4G wireless systems. This paper presents the design and implementation of a Space Time Block Coding (STBC) encoder that is based on Alamouti scheme on a Xilinx® Virtex™-4 XC4VLX60 Field Programmable Gate Arrays (FPGA) device. This encoder is a part of MIMO testbed, equipped with multiple element antennas (MEA) at both ends of the link. The task of this Alamouti encoder is to appropriately encode the modulated symbols to achieve both time and spatial diversity. In this paper, a comprehensive explanation of the complete design process is provided, including an illustration of the tools used in its development. The encoder for the MIMO testbed is developed based on modular design which simplifies system design, reduces development time, eases hardware update and facilitates testing the various modules in an independent manner.
Hemophilia Information System of Macedonia
Authors: Vanco Cabukovski
Venue: Proceedings of the 2009 International Conference on eHealth, Telemedicine, and Social Medicine (2009)

In this paper, the Hemophilia Information System of Macedonia (HISM), developed in collaboration with World Federation of Hemophilia (WFH), is presented. This system provides full automation of the Hemophilia Treatment Center of Macedonia (HTCM) daily working processes. It also provides possibility for connection of the HTCM with 14 Transfusion services whole over Macedonia, securing the best possible care, treatment and support for people with hemophilia or related bleeding disorder and their families in the Republic of Macedonia. HISM is web based information system accessible via Internet, fully secure and reliable. It is developed for ORACLE and the servers run under Linux operating system. Currently the Transfusion services and centers located in 14 Macedonian cities are equipping with computers and Internet access.
A note on “An approximation algorithm for the load-balanced semi-matching problem in weighted bipartite graphs”
Authors: Kangbok Lee, Joseph Y. -T. Leung, Michael L. Pinedo
Venue: Information Processing Letters (2009)

We point out an error in the algorithm for the Load Balanced Semi-Matching Problem presented by C.P. Low [C.P. Low, An approximation algorithm for the load-balanced semi-matching problem in weighted bipartite graphs, Information Processing Letters 100 (2006) 154-161]. This problem is equivalent to a parallel machine scheduling problem subject to eligibility constraints, in which each job has a pre-determined set of machines capable of processing the job.
Automating the development of shipyard manufacturing models
Authors: Gabriel A. Burnett, D. J. Medeiros, Daniel A. Finke, Mark T. Traband
Venue: Proceedings of the 40th Conference on Winter Simulation (2008)

Simulation results are often needed within a short time frame, while the development of simulation models can be time consuming. We develop a methodology to facilitate rapid generation of simulation models from an enterprise database. Data is communicated between Product Lifecycle Management (PLM) software and Flexsim using a standard Microsoft Excel format. We have developed a custom Flexsim interface and software-specific model generator that creates a discrete event simulation model from the PLM input data. Preliminary results show that the methodology can reduce the cost of simulation model generation while simultaneously improving the accuracy of generated models. This work highlights the benefits of automatic model generation techniques, describes a shipbuilding implementation of the methodology, and provides direction for future work.
Service-Oriented Production Grids and User Support
Authors: Gabor Terstyanszky, Tamas Kiss, Thierry Delaitre, Stephen Winter, Peter Kacsuk, Gabor Kecskemeti
Venue: Proceedings of the 7th IEEE/ACM International Conference on Grid Computing (2006)

Currently several production Grids offer their resources for academic communities. These Grids are resource-oriented Grids with minimal user support. The existing user support incorporates Grid portals without workflow editing and execution capabilities, brokering with no QoS and SLA management, security solutions without privacy and trust management, etc. They do not provide any kind of support for running legacy code applications on Grids. Production Grids started the migration from resource-oriented Grids to service-oriented ones. The migration defines additional requirements towards the user support. These requirements include solving interoperability among Grids, automatic service deployment, dynamic user management, legacy code support, QoA and SLA-based brokering, etc. This paper discusses some aspects of the user support needed for service-oriented production Grids.
Spatial characterization of electrical power consumption patterns over India using temporal DMSP-OLS night-time satellite data
Authors: T. R. Kiran Chand, K. V. S. Badarinath, C. D. Elvidge, B. T. Tuttle
Venue: International Journal of Remote Sensing (2009)

Changes in electric power consumption patterns of a country over a period of time reflect on its socio-economic development and energy utilization processes. In the present study, we characterized spatial and temporal changes in electric power consumption patterns over India during 1993 to 2002, using 'night-time lights' data given by the Defense Meteorological Satellite Program-Operational Line Scan System (DMSP-OLS) over the Indian region. The OLS operates in two bands: visible (0.5-0.9 &micro;m) and thermal (10.5-12.5 &micro;m) and has a unique capability of picking up faint sources of visible-near infrared emissions (lights) at night on the Earth's surface including cities, towns and villages with a DN value ranging from 1 to 63. Night-time light images for cloud-free dates given by the DMSP-OLS from 1993 to 2002 were segregated into respective years and were integrated to generate one 'Stable light image' per year. Changes in light scenarios over the Indian region in the decadal time frame were studied using stable lights datasets from 1993 to 2002. Information on changes in the light scenarios was integrated with demographic data to characterize developments in major cities and states of India. Results of the study suggested an increase in population by 170 million and power consumption from 44962 million kWh to 306355 million kWh over the country during 1993-2002, which was associated with an overall increase in number of night-time lights of up to 26% in all states, indicating development in electric power consumption patterns. Correlation analysis between increase in population to the increase in night-time lights and electric power consumption showed a coefficient of determination, R2, of 0.59 and 0.56 respectively. Increase in light intensities along the peripheries of major Indian cities was observed, which indicated increased stress on the cities and corresponding development in power consumption patterns during the decadal time frame. Certain states, however, showed a decrease in night-time lights in some areas, which are primarily attributed to the decreased economic growth trend and poverty and accounted to the scatter observed in the correlation analysis. Results are discussed in the paper.
PatchMatch: a randomized correspondence algorithm for structural image editing
Authors: Connelly Barnes, Eli Shechtman, Adam Finkelstein, Dan B Goldman
Venue: ACM Transactions on Graphics (TOG) (2009)

This paper presents interactive image editing tools using a new randomized algorithm for quickly finding approximate nearest-neighbor matches between image patches. Previous research in graphics and vision has leveraged such nearest-neighbor searches to provide a variety of high-level digital image editing tools. However, the cost of computing a field of such matches for an entire image has eluded previous efforts to provide interactive performance. Our algorithm offers substantial performance improvements over the previous state of the art (20-100x), enabling its use in interactive editing tools. The key insights driving the algorithm are that some good patch matches can be found via random sampling, and that natural coherence in the imagery allows us to propagate such matches quickly to surrounding areas. We offer theoretical analysis of the convergence properties of the algorithm, as well as empirical and practical evidence for its high quality and performance. This one simple algorithm forms the basis for a variety of tools -- image retargeting, completion and reshuffling -- that can be used together in the context of a high-level image editing application. Finally, we propose additional intuitive constraints on the synthesis process that offer the user a level of control unavailable in previous methods.
Beta approximations for bridge sampling
Authors: Paul Glasserman, Kyoung-Kuk Kim
Venue: Proceedings of the 40th Conference on Winter Simulation (2008)

We consider the problem of simulating X conditional on the value of X + Y, when X and Y are independent positive random variables. We propose approximate methods for sampling (X|X + Y) by approximating the fraction (X/z|X + Y = z) with a beta random variable. We discuss applications to L&eacute;vy processes and infinitely divisible distributions, and we report numerical tests for Poisson processes, tempered stable processes, and the Heston stochastic volatility model.
Hybrid intelligent vision-based car-like vehicle backing systems design
Authors: Chih-Yung Chen, Hsuan-Ming Feng
Venue: Expert Systems with Applications: An International Journal (2009)

This paper is integrated with discrete wavelet transformation (DWT), self-organizing map (SOM) neural network and fuzzy logic control methods to approach the intelligent vision-based car-like vehicle backing system. All the presented procedures are implemented as software simulations and are synthesized as hardware to describe their superiorities in our experimental platform. In a word, this study has been implemented as a car-like vehicle consists of a field programmable gate array (FPGA) chip, a CMOS image sensor, a microprocessor, a flash memory module, and servo motors. From our experimental results, this paper not only illustrates the results with computer simulation, but also demonstrates the practical car parking achievements in a real environment.
Proceedings of the 6th International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa
Authors: Alexandre Hardy, CONFERENCE CHAIR Patrick Marais
Venue: Computer graphics, virtual reality, visualisation and interaction in Africa (2009)

Welcome to Afrigraph 2009, the 6th International Conference on Virtual Reality, Computer Graphics, Visualization and Interaction in Africa. This conference is the sixth in the series, and is held in Pretoria, South Africa. The conference is hosted by the Academy for Information Technology at the University of Johannesburg. The conference is the main showcase for the Afrigraph organization, which was formally established in March 2001 and chartered in February 2003. Afrigraph 2009 is sponsored by ACM SIGGRAPH, in cooperation with the Eurographics Organization. The Afrigraph organization (www.afrigraph.org) was formed after a visit by a high level ACM SIGGRAPH delegation in 2001. The primary goal of Afrigraph is to promote computer graphics in Africa, particularly graphics applications and solutions which are relevant for the developing world. This year twenty-two papers were submitted. Each paper was reviewed by at least four members of the International Programme Committee. The review process was double-blind, with review allocation and acceptance decisions being delegated to other members of the programme committee where members of organizing committee might experience conflict of interest. We were able to accept 12 full papers, and several posters and artwork. The acceptance rate for papers at this conference is 55%.