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2009

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Articles 5371 - 5400 of 7615

Full-Text Articles in Physical Sciences and Mathematics

Search For Resonant Pair Production Of Neutral Long-Lived Particles Decaying To Bb In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration Jan 2009

Search For Resonant Pair Production Of Neutral Long-Lived Particles Decaying To Bb In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration

Kenneth Bloom Publications

We report on a first search for resonant pair production of neutral long-lived particles (NLLP) which each decay to a bb pair, using 3.6 fb-1 of data recorded with the D0 detector at the Fermilab Tevatron collider. We search for pairs of displaced vertices in the tracking detector at radii in the range 1.6–20 cm from the beam axis. No significant excess is observed above background, and upper limits are set on the production rate in a hidden-valley benchmark model for a range of Higgs boson masses and NLLP masses and lifetimes.

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Search For Next-To-Minimal Supersymmetric Higgs Bosons In The H → Aa → Μμμμ, Μμττ Channels Using Pp Collisions At √S = 1.96 Tev, V.M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration Jan 2009

Search For Next-To-Minimal Supersymmetric Higgs Bosons In The H → Aa → Μμμμ, Μμττ Channels Using Pp Collisions At √S = 1.96 Tev, V.M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration

Kenneth Bloom Publications

We report on a first search for production of the lightest neutral CP-even Higgs boson (h) in the next-to-minimal supersymmetric standard model, where h decays to a pair of neutral pseudoscalar Higgs bosons (a), using 4.2 fb-1 of data recorded with the D0 detector at Fermilab. The a bosons are required to either both decay to μ+μ- or one to μ+μ and the other to τ+τ. No significant signal is observed, and we set limits on its production as functions of Ma and Mh.

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Review: A Class Of Solutions To The Quantum Colored Yang-Baxter Equation, Gizem Karaali Jan 2009

Review: A Class Of Solutions To The Quantum Colored Yang-Baxter Equation, Gizem Karaali

Pomona Faculty Publications and Research

No abstract provided.

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An Analysis Of Drug Dissolution Rates In The Usp 24 Type 2 Apparatus, David Mcdonnell, Brendan Redmond, Deirdre M. D'Arcy, Anne Marie Healy, Owen Corrigan Jan 2009

An Analysis Of Drug Dissolution Rates In The Usp 24 Type 2 Apparatus, David Mcdonnell, Brendan Redmond, Deirdre M. D'Arcy, Anne Marie Healy, Owen Corrigan

Articles

This paper applies boundary layer theory to the process of drug dissolution in the USP 24, Type 2 Apparatus. The mass transfer rate from the top flat surface of a compact in various positions within the device is evaluated by means of a Pohlhausen integral method.

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Partial Ion Yield Sspectroscopy Around The Cl 2p And C 1s Ionization Thresholds In Cf3cl, D. Ceolin, Maria Novella Piancastelli, Wayne C. Stolte, Dennis W. Lindle Jan 2009

Partial Ion Yield Sspectroscopy Around The Cl 2p And C 1s Ionization Thresholds In Cf3cl, D. Ceolin, Maria Novella Piancastelli, Wayne C. Stolte, Dennis W. Lindle

Chemistry and Biochemistry Faculty Research

We present a partial ion yield experiment on freon 13, CF3Cl, excited in the vicinity of the C 1s and Cl 2p ionization thresholds. We have collected a large amount of cationic fragments and a few anionic fragments at both edges. We have observed a strong intensity dependence of Rydberg transitions with ion fragment size for the CFnCl+ and CFn+/F+ (n=0–3) series at both the Cl 2p and C 1s ionization edges. Selectivity in the fragmentation processes involving the C–Cl and C–F bonds are highlighted by the intensities of the C …

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Magnetic Doping Of The Golden Cage Cluster M@Au16− (M=Fe,Co,Ni), Lei-Ming Wang, Jaeil Bai, Anne Lechtken, Wei Huang, Detlef Schooss, Manfred Kappes, Xiao Cheng Zeng, Lai-Sheng Wang Jan 2009

Magnetic Doping Of The Golden Cage Cluster M@Au16− (M=Fe,Co,Ni), Lei-Ming Wang, Jaeil Bai, Anne Lechtken, Wei Huang, Detlef Schooss, Manfred Kappes, Xiao Cheng Zeng, Lai-Sheng Wang

Xiao Cheng Zeng Publications

Structural, electronic, and magnetic properties of the golden cage doped with a transition-metal atom, MAu16- (M =Fe,Co,Ni), are investigated using trapped ion electron diffraction, photoelectron spectroscopy, and density-functional theory. The best agreement to experiment is obtained for endohedral M@Au16- structures but with considerable distortions to the parent Au16- cage. Fe@Au16- and Co@Au16- are found to have similar structures with C2 symmetry while a C1 structure is obtained for Ni@Au16-. The 4s electrons are observed to transfer to the Au16 cage, whereas atomiclike …

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Tuning The Electronic Properties Of The Golden Buckyball By Endohedral Doping: M@Au16− (M=Ag,Zn, In), Lei-Ming Wang, Rhitankar Pal, Wei Huang, Xiao Cheng Zeng, Lai-Sheng Wang Jan 2009

Tuning The Electronic Properties Of The Golden Buckyball By Endohedral Doping: M@Au16− (M=Ag,Zn, In), Lei-Ming Wang, Rhitankar Pal, Wei Huang, Xiao Cheng Zeng, Lai-Sheng Wang

Xiao Cheng Zeng Publications

The golden Au16- cage is doped systematically with an external atom of different valence electrons: Ag, Zn, and In. The electronic and structural properties of the doped clusters, MAu16- (M =Ag,Zn, In), are investigated by photoelectron spectroscopy and theoretical calculations. It is observed that the characteristic spectral features of 16-, reflecting its near tetrahedral (Td) symmetry, are retained in the photoelectron spectra of MAu16-, suggesting endohedral structures with little distortion from the parent Au16- cage for the doped clusters. Density functional calculations show that …

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Dipole-Induced, Thermally Stable Lamellar Structure By Polar Aromatic Silane, Jinyue Jiang, Ocelio V. Lima, Yong Pei, Xiao Cheng Zeng, Li Tan, Eric Forsythe Jan 2009

Dipole-Induced, Thermally Stable Lamellar Structure By Polar Aromatic Silane, Jinyue Jiang, Ocelio V. Lima, Yong Pei, Xiao Cheng Zeng, Li Tan, Eric Forsythe

Xiao Cheng Zeng Publications

Lamellar structures, consisting of alternating inorganic layers separated by organic moieties, have attracted much attention over a wide range of applications, such as polymer-clay composites, rheology control, and optoelectronic devices. Organosilanes are ideal candidates for such efforts due to their ability to self-assemble and the intrinsic hybrid configuration of organic/inorganic moieties. Yet, the main emphasis has been focused on alkylsilane, where an alkyl group is linked with a silane terminal, i.e., R-SiX3 (R is alkane and X can be halogen or alkoxy). Construction of stacked monolayers of alkylsilane through chemisorption is possible. The demonstrated pathway usually takes place after …

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On The Phase Diagram Of Water With Density Functional Theory Potentials: The Melting Temperature Of Ice /H With The Perdew–Burke–Ernzerhof And Becke–Lee–Yang–Parr Functionals, Soohaeng Yoo, Xiao Cheng Zeng, Sotiris C. Xantheas Jan 2009

On The Phase Diagram Of Water With Density Functional Theory Potentials: The Melting Temperature Of Ice /H With The Perdew–Burke–Ernzerhof And Becke–Lee–Yang–Parr Functionals, Soohaeng Yoo, Xiao Cheng Zeng, Sotiris C. Xantheas

Xiao Cheng Zeng Publications

The melting temperature (Tm) of ice Ih was determined from constant enthalpy and pressure (NPH) Born–Oppenheimer molecular dynamics simulations to be 417±3 K for the Perdew–Burke– Ernzerhof and 411±4 K for the Becke–Lee–Yang–Parr density functionals using a coexisting ice (Ih)-liquid phase at constant pressures of P=2500 and 10 000 bar and a density p=1 g/cm3, respectively.

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Methodology To Estimate Cost Savings Associated With The Use Of Trap Monitor Systems By Wildlife Services, Karen Gebhardt, Stephanie A. Shwiff, Bruce Leland, Dusty Hatchett, Mike J. Bodenchuk Jan 2009

Methodology To Estimate Cost Savings Associated With The Use Of Trap Monitor Systems By Wildlife Services, Karen Gebhardt, Stephanie A. Shwiff, Bruce Leland, Dusty Hatchett, Mike J. Bodenchuk

Wildlife Damage Management Conference Proceedings

Legislative changes to regulations surrounding the use of traps and other capture devices have unambiguously impacted the manner in which these devices can be used. In many cases the revisions to trapping legislation have resulted in shortened trap check intervals. This change has increased the costs of using capture devices and decreased the efficiency of Wildlife Services (WS) specialists working in the field. The use of trap monitors may result in cost savings and increased efficiency. Trap monitor systems function as a remote notification system that can identify trap status. These monitor systems can be used as an alternative to …

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Trends In Summer Coyote And Wolf Predation On Sheep In Idaho During A Period Of Wolf Recovery, Alegra Galle, Mark Collinge, Richard Engeman Jan 2009

Trends In Summer Coyote And Wolf Predation On Sheep In Idaho During A Period Of Wolf Recovery, Alegra Galle, Mark Collinge, Richard Engeman

Wildlife Damage Management Conference Proceedings

Before the reintroduction of gray wolves (Canis lupus) to Idaho in 1995–1996, the primary depredation problem for livestock producers in summer was coyote (Canis latrans) predation on sheep and lambs. Since the reintroduction and biological recovery of wolves in Idaho, wolf predation on livestock has become a bigger problem in some areas than coyote predation. We evaluated trends in predation on sheep by coyotes and wolves in Idaho during the summer months, when most sheep are grazed on United States Forest Service (USFS) grazing allotments and are most vulnerable to wolf predation. An analysis of the …

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A Field-Test Of Rhodamine B As A Biomarker In Raccoons, Tricia Fry, Tara Baranowski, Brandi Hughey, Mike Dunbar Jan 2009

A Field-Test Of Rhodamine B As A Biomarker In Raccoons, Tricia Fry, Tara Baranowski, Brandi Hughey, Mike Dunbar

Wildlife Damage Management Conference Proceedings

Rhodamine B is a dye that when ingested results in fluorescent bands in growing hair and whiskers of many mammals. Previous research at Wildlife Services’ (WS) National Wildlife Research Center (NWRC) found that rhodamine B is a successful biomarker in raccoon whiskers and that raccoons do not have a taste aversion to the dye when it comprises ≤ 3% of a bait. Our study assessed the ease of bait distribution, whisker collection, and evaluation of the biomarker for potential use in the Oral Rabies Vaccination (ORV) program administered by the WS National Rabies Management Program (NRMP). In collaboration with WS …

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Habitat And Bird Communities At Small Airports In The Midwestern Usa, Travis L. Devault, Jacob Kubel, Olin E. Rhodes Jr., Richard Dolbeer Jan 2009

Habitat And Bird Communities At Small Airports In The Midwestern Usa, Travis L. Devault, Jacob Kubel, Olin E. Rhodes Jr., Richard Dolbeer

Wildlife Damage Management Conference Proceedings

Despite a substantial amount of information available on bird and other wildlife strikes at large international airports, relatively few researchers have considered bird hazards at smaller general aviation (GA) airports and airfields. However, small airports often are located in rural areas, and the potential for wildlife strikes may be significant, especially because airworthiness standards related to bird strikes are much less stringent for GA aircraft compared to commercial aircraft. In this study, we conducted habitat assessments (onsite land-cover evaluations and Geographic Information System analyses) and seasonal bird surveys (walking transects) over a period of 1 year at 10 small airports …

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Human Dimensions Of Invasive Vertebrate Species Management, Gary W. Witmer, G. M. Keirn, N. Hawley, C. Martin, J. K. Reaser Jan 2009

Human Dimensions Of Invasive Vertebrate Species Management, Gary W. Witmer, G. M. Keirn, N. Hawley, C. Martin, J. K. Reaser

Wildlife Damage Management Conference Proceedings

Invasive vertebrate species can cause substantial damage to natural resources, property, crops, livestock, and pose a disease hazard to humans, native wildlife and domestic animals. Numerous island species have become extinct or are threatened with extinction from invasive species. The high rate of invasive species introductions continues because of the large volumes of world trade and international travel. Humans are often responsible for introductions, but are also the key to their prevention, management, and eradication. However, many of the values and perceptions of invasive species vary among humans. Hence, the prevention and control of invasive vertebrates often requires adjusting human …

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Evolving Bird Management Research At The Usda Wildlife Service’S National Wildlife Research Center, Mark Tobin Jan 2009

Evolving Bird Management Research At The Usda Wildlife Service’S National Wildlife Research Center, Mark Tobin

Wildlife Damage Management Conference Proceedings

As the methods-development arm of the U.S. Department of Agriculture’s Wildlife Services program, the National Wildlife Research Center (NWRC) is charged with developing tools and information for protecting agriculture, human health and safety, and property from problems caused by wildlife, including birds. Increasingly the NWRC is being asked to provide basic ecological information on the population status of various bird species, and its role is expanding from a reactive one of providing management options to that of predicting long-term implications of various management actions. This paper describes several areas of research by NWRC scientists to address population-level questions in support …

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An Overview Of The International Beaver Ecology And Management Workshop, Jimmy Taylor Ii, David Bergman, Dale L. Nolte Jan 2009

An Overview Of The International Beaver Ecology And Management Workshop, Jimmy Taylor Ii, David Bergman, Dale L. Nolte

Wildlife Damage Management Conference Proceedings

On 9–12 October 2007, the U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services (WS) hosted the International Beaver Ecology and Management Workshop in Chandler, Arizona. The workshop was jointly sponsored by the Multi-City Sub-Regional Operations Group (SROG), Tres Rios Ecosystem Restoration and Flood Control Project and WS. The SROG management is comprised of representatives from the cities of Phoenix, Mesa, Glendale, Scottsdale, and Tempe. The workshop emphasized the management of beaver, their ecology, the part they play as a keystone species, and the issues they cause as an invasive species outside of the United States. The …

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Black Bear Activity And Visitation Patterns At Human Food Sources In Utah, Dustin Ranglack, Kari Signor, Kevin Bunnell, John Shivik Jan 2009

Black Bear Activity And Visitation Patterns At Human Food Sources In Utah, Dustin Ranglack, Kari Signor, Kevin Bunnell, John Shivik

Wildlife Damage Management Conference Proceedings

Bear activity and behaviors in areas of human use or proximity require research because of significant and potentially dangerous conflicts between humans and bears. Previous studies in areas of the country outside of Utah determined that black bears (Ursus americanus) tend to exhibit diurnal or crepuscular activity patterns. Activity patterns, however, may be influenced by humans, especially in urbanized landscapes or in areas such as campgrounds where anthropogenic food resources are available. Our study objectives were to determine bear activity schedules and changes in visitation patterns to regularly supplied anthropogenic food sites in the La Sal Mountains of …

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Exploring Predation And Animal Coloration Through Outdoor Activity, Joseph J. Fontaine, Karie L. Decker Jan 2009

Exploring Predation And Animal Coloration Through Outdoor Activity, Joseph J. Fontaine, Karie L. Decker

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Although children often characterize animals by the animals' color or pattern. the children seldom understand the evolutionary and ecological factors that favor particular colors. In this ilrticle. we describe two activities that help students understand the distinct evolutionary stmtegies of warning coloration and camoutlage. Because both of these strategies effectively allow prey animals to avoid predation. they can help explain considerable variation in animal coloration.

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Spatial And Temporal Variation In Climate Change: A Bird’S Eye View, Joseph J. Fontaine, K. L. Decker, S. K. Skagen, C. Van Riper Iii Jan 2009

Spatial And Temporal Variation In Climate Change: A Bird’S Eye View, Joseph J. Fontaine, K. L. Decker, S. K. Skagen, C. Van Riper Iii

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Recent changes in global climate have dramatically altered worldwide temperatures and the corresponding timing of seasonal climate conditions. Recognizing the degree to which species respond to changing climates is therefore an area of increasing conservation concern as species that are unable to respond face increased risk of extinction. Here we examine spatial and temporal heterogeneity in the rate of climate change across western North America and discuss the potential for conditions to arise that may limit the ability of western migratory birds to adapt to changing climates. Based on 52 years of climate data, we show that changes in temperature …

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Empirical Usage Metadata In Learning Objects, Gwen Nugent, Kevin Kupzyk, S. A. Riley, L.D. Miller, Jesse Hostetler, Leen-Kiat Soh, Ashok Samal Jan 2009

Empirical Usage Metadata In Learning Objects, Gwen Nugent, Kevin Kupzyk, S. A. Riley, L.D. Miller, Jesse Hostetler, Leen-Kiat Soh, Ashok Samal

CSE Conference and Workshop Papers

The iLOG Project (Intelligent Learning Object Guide) is designed to augment multimedia learning objects with information about (1) how a learning object has been used, (2) how it has impacted instruction and learning, and (3) how it should be used. The goal of the project is to generate metadata tags from data collected while students interact with learning objects; these metadata tags can then be used to help teachers identify learning objects that match the educational and experiential backgrounds of their students. The project involves the development of an agent-based intelligent system for tracking student interaction with learning objects, in …

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Jor: A Journal-Guided Reconstruction Optimization For Raid-Structured Storage Systems, Suzhen Wu, Dan Feng, Hong Jiang, Bo Mao, Lingfang Zeng, Jianxi Chen Jan 2009

Jor: A Journal-Guided Reconstruction Optimization For Raid-Structured Storage Systems, Suzhen Wu, Dan Feng, Hong Jiang, Bo Mao, Lingfang Zeng, Jianxi Chen

CSE Conference and Workshop Papers

This paper proposes a simple and practical RAID reconstruction optimization scheme, called JOurnal-guided Reconstruction (JOR). JOR exploits the fact that significant portions of data blocks in typical disk arrays are unused. JOR monitors the storage space utilization status at the block level to guide the reconstruction process so that only failed data on the used stripes is recovered to the spare disk. In JOR, data consistency is ensured by the requirement that all blocks in a disk array be initialized to zero (written with value zero) during synchronization while all blocks in the spare disk also be initialized to zero …

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An Adaptive Steganography Scheme For Voice Over Ip, Hui Tian, Ke Zhou, Hong Jiang, Yongfeng Huang, Jin Liu, Dan Feng Jan 2009

An Adaptive Steganography Scheme For Voice Over Ip, Hui Tian, Ke Zhou, Hong Jiang, Yongfeng Huang, Jin Liu, Dan Feng

CSE Conference and Workshop Papers

This paper presents an adaptive steganography scheme for Voice over IP (VoIP). Differing from existing steganography techniques for VoIP, this scheme enhances the embedding transparency by taking into account the similarity between Least Significant Bits (LSBs) and embedded messages. Moreover, we introduce the notion of Partial Similarity Value (PSV). By properly setting the threshold PSV, we can adaptively balance the embedding transparency and capacity. We evaluate the effectiveness of this scheme with G.729a as the codec of the cover speech in StegTalk, a covert communication system based on VoIP. The experimental results demonstrate that our technique provides better performance than …

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Density-Based Clustering Of Polygons, Deepti Joshi, Ashok Samal, Leen-Kiat Soh Jan 2009

Density-Based Clustering Of Polygons, Deepti Joshi, Ashok Samal, Leen-Kiat Soh

CSE Conference and Workshop Papers

Clustering is an important task in spatial data mining and spatial analysis. We propose a clustering algorithm P-DBSCAN to cluster polygons in space. PDBSCAN is based on the well established density-based clustering algorithm DBSCAN. In order to cluster polygons, we incorporate their topological and spatial properties in the process of clustering by using a distance function customized for the polygon space. The objective of our clustering algorithm is to produce spatially compact clusters. We measure the compactness of the clusters produced using P-DBSCAN and compare it with the clusters formed using DBSCAN, using the Schwartzberg Index. We measure the effectiveness …

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An Adaptive Steganography Scheme For Voice Over Ip, Hui Tian, Ke Zhou, Hong Jiang, Yongfeng Huang, Jin Liu, Dan Feng Jan 2009

An Adaptive Steganography Scheme For Voice Over Ip, Hui Tian, Ke Zhou, Hong Jiang, Yongfeng Huang, Jin Liu, Dan Feng

CSE Conference and Workshop Papers

This paper presents an adaptive steganography scheme for Voice over IP (VoIP). Differing from existing steganography techniques for VoIP, this scheme enhances the embedding transparency by taking into account the similarity between Least Significant Bits (LSBs) and embedded messages. Moreover, we introduce the notion of Partial Similarity Value (PSV). By properly setting the threshold PSV, we can adaptively balance the embedding transparency and capacity. We evaluate the effectiveness of this scheme with G.729a as the codec of the cover speech in StegTalk, a covert communication system based on VoIP. The experimental results demonstrate that our technique provides better performance than …

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Classification And Cluster Analysis Of Complex Time-Of-Flight Secondary Ion Mass Spectrometry For Biological Samples, Stephen E. Reichenbach, Xue Tian, Qingping Tao, Alex Henderson Jan 2009

Classification And Cluster Analysis Of Complex Time-Of-Flight Secondary Ion Mass Spectrometry For Biological Samples, Stephen E. Reichenbach, Xue Tian, Qingping Tao, Alex Henderson

CSE Conference and Workshop Papers

Identifying and separating subtly different biological samples is one of the most critical tasks in biological analysis. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) is becoming a popular and important technique in the analysis of biological samples, because it can detect molecular information and characterize chemical composition. ToF-SIMS spectra of biological samples are enormously complex with large mass ranges and many peaks. As a result the classification and cluster analysis are challenging. This study presents a new classification algorithm, the most similar neighbor with a probability-based spectrum similarity measure (MSN- PSSM), which uses all the information in the entire ToF- SIMS …

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Joint Computing And Network Resource Scheduling In A Lambda Grid Network, Vaidhehi Lakshmiraman, Byrav Ramamurthy Jan 2009

Joint Computing And Network Resource Scheduling In A Lambda Grid Network, Vaidhehi Lakshmiraman, Byrav Ramamurthy

CSE Conference and Workshop Papers

Data-intensive Grid applications require huge data transfers between grid computing nodes. These computing nodes, where computing jobs are executed, are usually geographically separated. A grid network that employs optical wavelength division multiplexing (WDM) technology and optical switches to interconnect computing resources with dynamically provisioned multi-gigabit rate bandwidth lightpath is called a Lambda Grid network. A computing task may be executed on any one of several computing nodes which possesses the necessary resources. In order to reflect the reality in job scheduling, allocation of network resources for data transfer should be taken into consideration. However, few scheduling methods consider the communication …

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A Cooperative Scheme For Dynamic Window Resizing In P2p Live Streaming, Zhipeng Ouyang, Lisong Xu, Byrav Ramamurthy Jan 2009

A Cooperative Scheme For Dynamic Window Resizing In P2p Live Streaming, Zhipeng Ouyang, Lisong Xu, Byrav Ramamurthy

CSE Conference and Workshop Papers

Due to their widespread popularity, Peer-to-Peer (P2P) live streaming systems have become a great challenge for Internet Service Providers (ISPs) as they consume huge amount of Internet bandwidth. By observing that different users may watch a channel with different window sizes, we propose a cooperative scheme called Partial Participation Scheme (PPS) in which different peers request a video stream at different rates based on their window sizes, and a subset of peers viewing the video stream using a small window work as helpers to forward extra data to help other peers using a large window. By reducing streaming rate received …

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A Flexible Divide-And-Conquer Protocol For Multi-View Peer-To-Peer Live Streaming, Miao Wang, Lisong Xu, Byrav Ramamurthy Jan 2009

A Flexible Divide-And-Conquer Protocol For Multi-View Peer-To-Peer Live Streaming, Miao Wang, Lisong Xu, Byrav Ramamurthy

CSE Conference and Workshop Papers

Multi-view peer-to-peer (P2P) live streaming systems have recently emerged, where a user can simultaneously watch multiple channels. Previous work on multi-view P2P streaming solves the fundamental inter-channel bandwidth competition problem at the individual peer level, and thus can be used with very limited types of streaming protocols. In this paper, we propose a new protocol for multi-view P2P streaming, called Divide-and-Conquer (DAC), which efficiently solves the inter-channel bandwidth competition problem using a divide-and-conquer strategy at the channel level, and thus is flexible to work with various streaming protocols. This makes DAC more suitable for upgrading current single-view P2P live streaming …

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Regression Model Checking, Guowei Yang, Matthew B. Dwyer, Gregg Rothermel Jan 2009

Regression Model Checking, Guowei Yang, Matthew B. Dwyer, Gregg Rothermel

CSE Conference and Workshop Papers

Model checking is a promising technique for verifying program behavior and is increasingly finding usage in industry. To date, however, researchers have primarily considered model checking of single versions of programs. It is well understood that model checking can be very expensive for large, complex programs. Thus, simply reapplying model checking techniques on subsequent versions of programs as they evolve, in the limited time that is typically available for validating new releases, presents challenges. To address these challenges, we have developed a new technique for regression model checking (RMC), that applies model checking incrementally to new versions of systems. We …

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Revealing The Copy And Paste Habits Of End Users, Kathryn T. Stolee, Sebastian Elbaum, Gregg Rothermel Jan 2009

Revealing The Copy And Paste Habits Of End Users, Kathryn T. Stolee, Sebastian Elbaum, Gregg Rothermel

CSE Conference and Workshop Papers

Transferring data across applications is a common end user task, and copying and pasting via the clipboard lets users do so relatively easily. Using the clipboard, however, can also introduce inefficiencies and errors in user tasks. To help researchers and tool developers understand and address these problems, we studied how end users interact with the clipboard through cut, copy, and paste actions. This study was performed by logging clipboard interactions while end users performed everyday tasks. From the clipboard usage data, we have identified several usage patterns that describe how data is transferred within the desktop environment. Such patterns help …

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