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Articles 841 - 870 of 5573
Full-Text Articles in Physical Sciences and Mathematics
Informal Animation Sketching With K-Sketch, Richard C. Davis
Informal Animation Sketching With K-Sketch, Richard C. Davis
Research Collection School Of Computing and Information Systems
Animation is a powerful medium that is accessible to few, because current animation tools are extremely complex. This complexity arises partially from current tools’ focus on precise, often unnecessary details and partially from the difficulty of finding a small but sufficiently powerful set of tool features. We are designing K-Sketch, an informal 2D animation tool that uses sketching and demonstration to radically reduce the time needed to create an animation. Our field studies investigating the needs of current anima-tion tool users and would-be users are helping us to mini-mize complexity by showing us how to prioritize the many possible tool …
Can Infopipes Facilitate Reuse In A Traffic Application?, Emerson Murphy-Hill, Chuan-Kai Lin, Andrew P. Black, Jonathan Walpole
Can Infopipes Facilitate Reuse In A Traffic Application?, Emerson Murphy-Hill, Chuan-Kai Lin, Andrew P. Black, Jonathan Walpole
Computer Science Faculty Publications and Presentations
Infopipes are presented as reusable building blocks for streaming applications. To evaluate this claim, we have built a significant traffic application in Smalltalk using Infopipes. This poster presents a traffic problem and solution, a short introduction to Infopipes, and the types of reuse Infopipes facilitate in our implementation.
Automatic 3d Face Modeling Using 2d Active Appearance Models, Jianke Zhu, Steven Hoi, Michael R. Lyu
Automatic 3d Face Modeling Using 2d Active Appearance Models, Jianke Zhu, Steven Hoi, Michael R. Lyu
Research Collection School Of Computing and Information Systems
Although a lot of promising research findings have been studied on 3D face modeling in the past years, it is still a challenge to generate realistic 3D human face models and facial animations. This paper presents a novel approach to model 3D faces automatically from still images or video sequences without manual interactions. Our proposed scheme comprises three steps. First, we offline construct 3D shape models using Active Appearance Models (AAMs), which saves large computation costs for online modeling. Second, based on the computed 3D shape models, we propose an efficient algorithm to estimate the parameters of 3D pose and …
Improving Pro Forma Analysis Through Better Terminal Value Estimates, Tom Arnold, David S. North, Roy A. Wiggins
Improving Pro Forma Analysis Through Better Terminal Value Estimates, Tom Arnold, David S. North, Roy A. Wiggins
Finance Faculty Publications
Basic pro forma analysis often estimates the terminal value input using a simple growing perpetuity assumption. While this assumption is easy to implement, it potentially creates an upward bias in some inputs leading to lower firm or project value outputs. The purpose of this paper is to demonstrate a more accurate way to estimate the terminal value input. Further, by allowing for multiple sales growth rates and by not restricting other input variables to necessarily grow at these same rates, a more accurate, flexible, compact, and thorough analysis is possible.
Agroecology Of The Naso-Teribe: The Management And Conservation Of Traditional Agroecological Systems, Maisie Ganz
Agroecology Of The Naso-Teribe: The Management And Conservation Of Traditional Agroecological Systems, Maisie Ganz
Independent Study Project (ISP) Collection
The term “agroecology” is used to describe the sustainable design and management of agricultural systems by the application of ecological concepts and principles. The resulting agroecosystems, often practiced by indigenous or poor farmers in marginal environments without access to external technologies, are systems of food production that integrate cultivated crops into surrounding ecosystems. The Naso-Teribe, an indigenous community of approximately 3,800 individuals living in the forests of western Panama, practice a complex agroecological system. The Naso farmers’ agricultural practices contribute to, and are dependent on, the biodiversity of resources available. The ways in which Naso farmers manage, maintain, and preserve …
The Survival Of The Central American Squirrel Monkey (Saimiri Oerstedi): The Habitat And Behavior Of A Troop On The Burica Peninsula In A Conservation Context, Liana Burghardt
Independent Study Project (ISP) Collection
The conservation status of Central American Squirrel monkeys (Saimiri oerstedi) on the far southern coast of Peninsula Burica in Panama was assessed over the course of a 13 day study period. Four troops of squirrel monkeys (67 individuals) were located on the southern coast of Peninsula Burica. Using information from local sources it can be estimated that up to 7 troops (157 individuals) live in the 7-8 km2 study site. These troops are sharing an estimated 80 ha of habitat which compared to past studies is a fairly low amount of habitat.
One troop of squirrel monkeys which is fed …
Periodismo Medioambiental, Peter Weisberg
Periodismo Medioambiental, Peter Weisberg
Independent Study Project (ISP) Collection
INTAG is a community run, environmental newspaper that serves the county of Intag on the western slopes of the Andes in northern Ecuador. For the month of November 2005, I worked for the newspaper, writing articles and researching ways in which the paper can increase communication among different organizations that formed over the last eleven years of resistance to proposed mining. After interviewing eleven community leaders, I conclude that the paper can 1) do more to elicit the participation of groups that are currently inactive and 2) maintain its ecological position while gaining credibility by constructively criticizing the anti-mining community …
¿Qué Vale Más: El Agua O El Oro? Las Implicaciones De Y Reacciones Al Proyecto Minero Pascua Lama, Leni Wolf
¿Qué Vale Más: El Agua O El Oro? Las Implicaciones De Y Reacciones Al Proyecto Minero Pascua Lama, Leni Wolf
Independent Study Project (ISP) Collection
The mining project Pascua Lama has attracted much attention for a variety of reasons. First and foremost, the location of the project is such that any type of environmental problems, whether it be contamination of the water or destruction of the masses of ice that lie in the project zone, could have detrimental affects on the entire valley and the 70,000 people who live there. However, there are many other important aspects of the project, such as the question of economic growth, the process of citizen participation in its evaluation, and the relations among the various actors involved and affected …
The Role Of Tibetan Buddhism And Culture In Sustainable Development (A Case Study Of Yubeng Village), Frazer Lanier
The Role Of Tibetan Buddhism And Culture In Sustainable Development (A Case Study Of Yubeng Village), Frazer Lanier
Independent Study Project (ISP) Collection
During a lecture by Li Bo, of CBIK (the Center for Biodiversity and Indigenous Knowledge a Chinese NGO), I was given a glimpse into the role that culture plays within poverty alleviation and environmental conservation. While poverty alleviation aims to develop community economies, this goal is usually seen as being in conflict with environmental conservation because it requires the use of environmental resources. This is a common misperception. According to Gou Jing’s article Gateway between Culture and Nature, “man’s touch bestows nature with culture” (Guo Jing 12). The interaction between nature and humans is the foundation for culture and the …
The Role Of Malagasy Women In Community Development: Analyzing The Potential For The Creation Of A Women’S Association For Alternative Livelihoods In Ifaty, Amanda Fencl
Independent Study Project (ISP) Collection
Integrated Conservation and development projects (ICDPs) have increased in number worldwide as conservation organizations have to come to terms with the importance of involving and addressing the needs of local human populations to order to achieve their conservation goals. Madagascar’s unique biodiversity, environmental degradation, and plaguing poverty has made ICDPs crucial in achieving national goals of tripling the area of natural heritage conserved and poverty reduction through socially, economically, and ecologically sustainable development. In order to understand how such sustainable development can be achieved, it is essential to spend time enhancing one’s understanding of the local mentality and worldview. On …
Performance Evaluation Of Distributed Security Protocols Using Discrete Event Simulation, Meiyuan Zhao
Performance Evaluation Of Distributed Security Protocols Using Discrete Event Simulation, Meiyuan Zhao
Dartmouth College Ph.D Dissertations
The Border Gateway Protocol (BGP) that manages inter-domain routing on the Internet lacks security. Protective measures using public key cryptography introduce complexities and costs. To support authentication and other security functionality in large networks, we need public key infrastructures (PKIs). Protocols that distribute and validate certificates introduce additional complexities and costs. The certification path building algorithm that helps users establish trust on certificates in the distributed network environment is particularly complicated. Neither routing security nor PKI come for free. Prior to this work, the research study on performance issues of these large-scale distributed security systems was minimal. In this thesis, …
Simple Electrooptical Sensors For Inorganic Anions, Pavel Anzenbacher Jr., Karolina Jursikova, Manuel Marquez
Simple Electrooptical Sensors For Inorganic Anions, Pavel Anzenbacher Jr., Karolina Jursikova, Manuel Marquez
Chemistry Faculty Publications
Electrooptical sensors consisting of a conjugated chromophore undergoing a change in color and a redox-active moiety such as quinone fused to the chromophore were synthesized. Strong changes in colorimetric and electrochemical properties were observed in the presence of inorganic anions. A unique anion-specific response was observed for fluoride, pyrophosphate, and acetate. DFT (B3LYP/6-31G*) calculations performed for both "on/off" states of a sensor-fluoride model are in good agreement with the observed electrochemical and spectroscopic data.
Interaction Of Porphyrins With A Dendrimer Template: Self-Aggregation Controlled By Ph, Pavel Kubat, Kamil Lang, Pavel Janda, Pavel Anzenbacher Jr.
Interaction Of Porphyrins With A Dendrimer Template: Self-Aggregation Controlled By Ph, Pavel Kubat, Kamil Lang, Pavel Janda, Pavel Anzenbacher Jr.
Chemistry Faculty Publications
The interaction between self-aggregated porphyrins such as 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (TPPS) and 5,10,15,20-tetrakis(4-phosphonatophenyl)porphyrin (TPPP), and a generation 5 (G5) PAMAM dendrimer template is governed by minute differences of porphyrin acido-basic properties. While at neutral pH both monomeric TPPS and TPPP form complexes with G5, decreasing pH did not lead to porphyrin ring protonation (pK(a) approximate to 5) but rather to the preferential formation of H-aggregates (probably H-dimers), most likely due to protonation of the G5. Upon further acidification of the solution, this face-to-face orientation of the porphyrin units is being converted to edge-to-edge aligned J-aggregates with a tightly defined structure. This process …
Benzothiadiazoles And Dipyrrolyl Quinoxalines With Extended Conjugated Chromophores-Fluorophores And Anion Sensors, Dmitry Aldakov, Manuel A. Palacios, Pavel Anzenbacher Jr.
Benzothiadiazoles And Dipyrrolyl Quinoxalines With Extended Conjugated Chromophores-Fluorophores And Anion Sensors, Dmitry Aldakov, Manuel A. Palacios, Pavel Anzenbacher Jr.
Chemistry Faculty Publications
Stable fluorescent chromophores find use in a growing number of practical applications, including their utility as laser dyes,1 emitters in light-emitting diodes,2 photoconductors,3 optical data storage,4 and optical switches.5 Stable fluorophores with high quantum yields are widely used in fluorescent sensors6 and labels.7 These became very popular lately, owing to their potential for high sensitivity at low concentration coupled with decreased cost of the required equipment.8 Recently, we have described a new class of fluorescent anion sensors bearing extended conjugated chromophores9 with incorporated 2,3-di(1H-2-pyrrolyl)quinoxaline, (DPQ), as the anion recognition element.10 Literature shows that DPQ binds anions via hydrogen bonding between …
Development And Application Of A Gg-Irms Reductive Pyrolysis Reactor Interface For The Δ34S Determination Of Sulfur In Individual Organic Compounds, N. Deborah Hewlett
Development And Application Of A Gg-Irms Reductive Pyrolysis Reactor Interface For The Δ34S Determination Of Sulfur In Individual Organic Compounds, N. Deborah Hewlett
Chemistry & Biochemistry Theses & Dissertations
The incorporation of sulfur into sedimentary organic matter is an important aspect of organic carbon preservation. A better understanding of the sulfur cycle and the formation of organo-sulfur compounds are necessary if we are to better understand the interaction of biogeochemical cycles of C, N, O, H. and S. Currently, the determination of 34S/32S in organic matter is limited to bulk organic samples. The sulfur isotopic analysis of individual organo-sulfur compounds within the sediments should allow for a more complete understanding of the sulfur cycle and the processes which lead to sulfur incorporation into organic matter. This …
Natural And Synthetic Viniferins Associated With The Grapevine Disease Young Vine Decline, David Michael Mcginnis
Natural And Synthetic Viniferins Associated With The Grapevine Disease Young Vine Decline, David Michael Mcginnis
Chemistry & Biochemistry Theses & Dissertations
Grapevine disease has been thc subject of intense research amongst viticulturists over the last few decades, especially during the 1990's. There has been discoveries that suggest grapevine disease is commonly caused by fungal pathogens. One of the most common fungi that the vine may become infected by is known as Botrytis cinerea. B. cinerea is capable of attacking the grapevine which in turn will lead to bunch rot in the grape clusters. This disease has been researched in great detail during the past several years and is one of only few microorganisms that have actually been identified. Phaeoacremrmium chnlmydospnrum …
Nil Is Not Nothing: Recognition Of Chinese Network Informal Language Expressions, Yunqing Xia, Wong, Wei Gao, Wei Gao
Nil Is Not Nothing: Recognition Of Chinese Network Informal Language Expressions, Yunqing Xia, Wong, Wei Gao, Wei Gao
Research Collection School Of Computing and Information Systems
Informal language is actively used in network-mediated communication, e.g. chat room, BBS, email and text message. We refer the anomalous terms used in such context as network informal language (NIL) expressions. For example, “偶(ou3)” is used to replace “我(wo3)” in Chinese ICQ. Without unconventional resource, knowledge and techniques, the existing natural language processing approaches exhibit less effectiveness in dealing with NIL text. We propose to study NIL expressions with a NIL corpus and investigate techniques in processing NIL expressions. Two methods for Chinese NIL expression recognition are designed in NILER system. The experimental results show that pattern matching method produces …
Fourier Transform Analysis Of Terahertz Radiation, Chikaodira N. Okpo
Fourier Transform Analysis Of Terahertz Radiation, Chikaodira N. Okpo
Electrical & Computer Engineering Theses & Dissertations
Advances in terahertz radiation (T-rays) technology have great promise in various technological areas ranging from medical technology, imaging technology and accelerator technology. At Thomas Jefferson Laboratory, the Free Electron Laser division (FEL) produces very powerful beam of laser light by accelerating electrons in bunches along a beamline. This laser light absorbs and releases energy at various wavelengths. The new FEL upgrade led to the production of very bright terahertz (THz) radiation with an average power of 1 00watts which is about 100,000 times brighter than those produced elsewhere. These T-rays have very significant applications in the Laboratory. The most significant …
Ozone Concentration In An Atmospheric Pressure Air Plasma Jet, Srinivas Reddy Suddala
Ozone Concentration In An Atmospheric Pressure Air Plasma Jet, Srinivas Reddy Suddala
Electrical & Computer Engineering Theses & Dissertations
A stable micro-plasma jet in air was generated from a direct current discharge between two molybdenum electrodes (0.25 mm thick) that were separated by an alumina insulator of the same thickness. The after-glow plasma jet was generated by blowing air through the space between the electrodes. A change from laminar to turbulent flow was observed at a gas flow rate of 140 ml/min. The length of the plasma jet increased with flow rate in the laminar mode to approximately 15 mm and decreased in the turbulent mode.
Increasing the gas flow rate up to 200 ml/min at a constant discharge …
Building A Research Lab: An Experimental And Theoretical Study Of The Aeroacoustics Of External-Gas Flares, S. Andrews, Caroline Lubert
Building A Research Lab: An Experimental And Theoretical Study Of The Aeroacoustics Of External-Gas Flares, S. Andrews, Caroline Lubert
Caroline P Lubert
No abstract provided.
High-Resolution Sonar Surveying: Techniques And Strategies For Improved Micro-Bathymetic Mapping, Vicki Ferrini, D. Fornari, T. Shank, D. Kelley, M. Tivey, S. Carbotte, D. Glickson, C. Roman, A. Sterling
High-Resolution Sonar Surveying: Techniques And Strategies For Improved Micro-Bathymetic Mapping, Vicki Ferrini, D. Fornari, T. Shank, D. Kelley, M. Tivey, S. Carbotte, D. Glickson, C. Roman, A. Sterling
Christopher N. Roman
No abstract provided.
A Kinetic Study Of Arsenic Removal Using Iron Enhanced Activated Alumina, P. Dimick, Samuel Morton, A. Kney, A. Baker
A Kinetic Study Of Arsenic Removal Using Iron Enhanced Activated Alumina, P. Dimick, Samuel Morton, A. Kney, A. Baker
Samuel A Morton
No abstract provided.
An Investigation Into The Effects Of Salt Concentration On Surfactant Adsorption Using A Qcm, Samuel Morton, S. Ray, R. Counce
An Investigation Into The Effects Of Salt Concentration On Surfactant Adsorption Using A Qcm, Samuel Morton, S. Ray, R. Counce
Samuel A Morton
No abstract provided.
Simulation Of Ultrashort Laser Pulse Propagation With High-Order Dispersion, Raman Scattering, And Shock Formation, Jeremy Gulley, Erik Zeek, William Dennis
Simulation Of Ultrashort Laser Pulse Propagation With High-Order Dispersion, Raman Scattering, And Shock Formation, Jeremy Gulley, Erik Zeek, William Dennis
Jeremy R. Gulley
No abstract is currently available.
Building A Classification Cascade For Visual Identification From One Example, Andras Ferencz, Erik G. Learned-Miller, Jitendra Malik
Building A Classification Cascade For Visual Identification From One Example, Andras Ferencz, Erik G. Learned-Miller, Jitendra Malik
Erik G Learned-Miller
Object identification (OID) is specialized recognition where the category is known (e.g. cars) and the algorithm recognizes an object's exact identity (e.g. Bob's BMW). Two special challenges characterize OID. (1) Interclass variation is often small (many cars look alike) and may be dwarfed by illumination or pose changes. (2) There may be many classes but few or just one positive "training" examples per class. Due to (1), a solution must locate possibly subtle object-specific salient features (a door handle) while avoiding distracting ones (a specular highlight). However, (2) rules out direct techniques of feature selection. We describe an online algorithm …
Spatial Sampling Design For Parameter Estimation Of The Covariance Function, Zhengyuan Zhu, Michael L. Stein
Spatial Sampling Design For Parameter Estimation Of The Covariance Function, Zhengyuan Zhu, Michael L. Stein
Zhengyuan Zhu
Graduate Student Satisfaction With An Online Discrete Mathematics Course, Amber Settle, Chad Settle
Graduate Student Satisfaction With An Online Discrete Mathematics Course, Amber Settle, Chad Settle
Amber Settle
On The Synthesis Of Microarray Experiments, Robert Gentleman, Markus Ruschhaupt, Wolfgang Huber
On The Synthesis Of Microarray Experiments, Robert Gentleman, Markus Ruschhaupt, Wolfgang Huber
Bioconductor Project Working Papers
With many different investigators studying the same disease and with a strong commitment to publish supporting data in the scientific community, there are often many different datasets available for any given disease. Hence there is substantial interest in finding methods for combining these datasets to provide better and more detailed understanding of the underlying biology. We consider the synthesis of different microarray data sets using a random effects paradigm and demonstrate how relatively standard statistical approaches yield good results. We identify a number of important and substantive areas which require further investigation.
Cooperative Conservation: Increasing Capacity Through Community Partnerships -- Interagency Volunteer Program & Cooperative Conservation Program: Quarterly Progress Report, Period Ending September 30, 2005, Margaret N. Rees
Get Outdoors Nevada
- 1,573 total volunteer records now loaded into database
- 230 new volunteers recruited through website: www.getoutdoorsnevada.org
- Website recorded an average of 35,000 hits per month for the quarter, with an average of 3,350 pages viewed per month
- Three major interagency volunteer events completed this quarter, at which more than 300 volunteers picked up a total of 128 cubic yards of litter at three separate National Public Lands Day clean-up events: September 17, 2005 - Sloan Canyon National Conservation Area September 24, 2005 - Red Rock National Conservation Area September 24, 2005 - Lake Mead National Recreation Area
- Interagency Volunteer Team selected …
Phases Found At Grain Boundary Of Yba2cu3o7-D 50 Nm Films On Srtio3 By Enhanced Anomalous Scattering At O:K, Cu:L2,3 And Ba:M4,5 Edges, Juana Acrivos
Phases Found At Grain Boundary Of Yba2cu3o7-D 50 Nm Films On Srtio3 By Enhanced Anomalous Scattering At O:K, Cu:L2,3 And Ba:M4,5 Edges, Juana Acrivos
Faculty Publications, Chemistry
A new phase is detected within 100micrometers of 24 DEG ab grain boundary (GB) in YBa2Cu3O7-d 50 nm films on SrTiO3 by enhanced (001) anomalous scattering. Site identification and temperature dependence is interpreted using crystallographic weights to distinguish enhanced scattering from total electron yield and fluorescence spectra. The c-axis, c0 indicates that only ortho-I phase is present far from GB, both ortho-I and II phases are present near GB. The phase c0 is constant versus temperature across the transition to superconductivity.