Index Catalog // ScholarsArchive@OSU

An implementation of a reliable broadcast scheme for 802.11 using network coding

Creator:: Edgecombe, Richard
Abstract:: Forward Error Correction and retransmission are two approaches used to reliably broadcast data in a network with poor quality of service. Taking some assumptions, it has been suggested that a retransmission based reliable broadcasting scheme using network coding should in theory provide an increase in bandwidth efficiency by combining packets...
Resource Type:: Masters Thesis

Data processing for anomaly detection in web-based applications

Creator:: Gaarudapuram Sriraghavan, Rajagopal
Abstract:: Web applications are popular attack targets. Misuse detection systems use signature databases to detect known attacks. However, it is difficult to keep the database up to date with the rate of discovery of vulnerabilities. They also cannot detect zero-day attacks. By contrast, anomaly detection systems learn the normal behavior of...
Resource Type:: Masters Thesis

Supporting the learning process of open source novices : an evaluation of code and project history visualization tools

Creator:: Park, Yunrim
Abstract:: Active participation and collaboration of community members are crucial to the continuation and expansion of open source software projects. Researchers have recognized the value of community in open source development and studied various aspects of it including structure of communities, motivations for participation, and collaboration among members. However, the majority...
Resource Type:: Masters Thesis

Effective decision-theoretic assistance through relational hierarchical models

Creator:: Natarajan, Sriraam
Abstract:: Building intelligent computer assistants has been a long-cherished goal of AI. Many intelligent assistant systems were built and fine-tuned to specific application domains. In this work, we develop a general model of assistance that combines three powerful ideas: decision theory, hierarchical task models and probabilistic relational languages. We use the...
Resource Type:: Dissertation

An automated web crawl methodology to analyze the online privacy landscape

Creator:: Sarkar, Chandan
Abstract:: Protecting end-users privacy and building trust are the two most important factors needed to support the growth of ecommerce. The increased dependence on the Internet for a wide variety of daily transactions causes a corresponding loss in privacy for many users, as virtually all websites collect data from users directly...
Resource Type:: Masters Thesis

A probabilistic model for anomaly detection in remote sensor streams

Creator:: Dereszynski, Ethan W.
Abstract:: Remote sensors are becoming the standard for observing and recording ecological data in the field. Such sensors can record data at fine temporal resolutions, and they can operate under extreme conditions prohibitive to human access. Unfortunately, sensor data streams exhibit many kinds of errors ranging from corrupt communications to partial...
Resource Type:: Masters Thesis

The commentator information system : understanding journalists' needs to overcome cognitive load and navigation issues

Creator:: Midy, Marie-Anne
Abstract:: Nowadays, sports events are a significant part of the every-day entertainment with local, national, and international championships. A lot of money is invested by broadcasting companies to attract new and more viewers, acquire broadcasting rights, or send entire crews on site to cover such events. Journalists are among the few...
Resource Type:: Masters Thesis

Gender differences in end-user debugging strategies

Creator:: Narayanan, Vaishnavi
Abstract:: There has been little prior research reporting strategy usage in end-user problem solving, and even less using gender as a factor. Without this type of information, enduser programming systems cannot know the “target” at which to aim, if they are to support male and female end-user programmers’ debugging. As a...
Resource Type:: Masters Thesis

Explaining debugging strategies to end-user programmers

Creator:: Subrahmaniyan, Neeraja
Abstract:: There has been little research into how end-user programming environments can provide explanations that could fill a critical information gap for end-user debuggers – help with debugging strategy. To address this need, we designed and prototyped a video-based approach for explaining debugging strategy, and accompanied it with a text-only approach....
Resource Type:: Masters Thesis

Structured gradient boosting

Creator:: Parker, Charles (Charles Lincoln)
Abstract:: The goal of many machine learning problems can be formalized as the creation of a function that can properly classify an input vector, given a set of examples of that function. While this formalism has produced a number of success stories, there are notable situations in which it fails. One...
Resource Type:: Dissertation

Image feature detection and matching for biological object recognition

Creator:: Deng, Hongli
Abstract:: Image feature detection and matching are two critical processes for many computer vision tasks. Currently, intensity-based local interest region detectors and local feature-based matching methods are used widely in computer vision applications. But in some applications, such as biological object recognition tasks, within-class changes in pose, lighting, color, and texture...
Resource Type:: Dissertation

Complex patterns in gender HCI : a data mining study of factors leading to end-user debugging success for females and males

Creator:: Grigoreanu, Valentina I.
Abstract:: Most of the work so far in the subfield of Gender HCI has followed a theory-driven approach. Established theories, however, do not take into account specific issues that arise in end-user debugging. We suspected that there may be important information that we were overlooking. We therefore employed a methodology change:...
Resource Type:: Masters Thesis

Accuracy versus cost in distributed data mining

Creator:: Deutschman, Stephanie
Abstract:: A basic tradeoff to consider when designing a distributed data-mining framework is the need for a compromise between the cost of communication and computation resources and the accuracy of the mining results. This is essentially a decision of whether it is more efficient to communicate all of the data to...
Resource Type:: Masters Thesis

A SAT-based planning framework for optimizing resource production

Creator:: Ventura, Christopher
Abstract:: Domain-independent automated planning is concerned with computing a sequence of actions that can transform an initial state into a desired goal state. Resource production domains form an interesting class of such problems, in that they typically require reasoning about concurrent durative-actions with continuous effects while minimizing some cost function. Although...
Resource Type:: Masters Thesis

Gray codes and their applications

Creator:: Anantha, Madhusudhanan
Abstract:: An n-bit Gray code is an ordered set of all 2n binary strings of length n. The special property of this listing is that Hamming distance between consecutive vectors is exactly 1. If the last and first codeword also have a Hamming distance 1 then the code is said to...
Resource Type:: Dissertation

Designing and understanding information retrieval systems using collaborative filtering in an academic library environment

Creator:: Jung, Seikyung
Abstract:: Accessing information on the Web has become ingrained into our daily lives, and we seek information from many different sources, including conference and journal publications, personal web pages, and others. Increasingly, web-based information retrieval systems such as web-based search engines, library on-line catalog systems, and subscription-based federated search systems are...
Resource Type:: Dissertation

Gender HCI issues in end-user programming

Creator:: Beckwith, Laura A.
Abstract:: Until recently, research has not considered whether the design of end-user programming environments, such as spreadsheets, multimedia authoring languages, and CAD systems, affects males and females differently. As a result, we began investigating how the two genders are impacted by end-user programming software and whether attention to gender differences is...
Resource Type:: Dissertation

End-user software engineering in the spreadsheet paradigm

Creator:: Abraham, Robin
Abstract:: Spreadsheets are among the most widely used end-user programming systems. Unfortunately, there is a high incidence of errors in end-user spreadsheets, and some of these errors have high impact. In this dissertation, we describe techniques we have developed to help end users develop safer spreadsheets. As part of our research,...
Resource Type:: Dissertation

Getting to local information : the role of different costs

Creator:: Rajaram, Vidya
Abstract:: Finding information can cost a significant amount of time, even when the information is already stored on the user’s local computer system. There is significant research aimed at reducing these time costs, but little research into exactly what these costs are or how they impact people’s use of tools and...
Resource Type:: Masters Thesis

Interactive 3D line integral convolution on the GPU

Creator:: Lakshmanan, Vasumathi
Abstract:: The Line Integral Convolution (LIC) is a mainstay of flow visualization. It is, however, computationally intensive, which limits its interactivity. Also, when used to view three-dimensional (3D) vector fields, the resulting images are dense and cluttered, making it difficult to perceive the flow on the interior parts of the field....
Resource Type:: Masters Thesis

Volume-volume matching

Creator:: Sandhu, Avneet
Abstract:: Oftentimes in visualization, the goal of using volume datasets is not just to visualize them but also to analyze and compare them. In order to compare the two volumes, we cannot take all the voxels into consideration. The size of a typical volume data set is quite large (maybe a...
Resource Type:: Masters Thesis

Multimedia streaming using multiple TCP connections

Creator:: Tullimalli, Sunand
Abstract:: Packet loss, delay and time-varying bandwidth are three main problems facing multimedia streaming applications over the Internet. Existing techniques such as Media-aware network protocol, network adaptive source and channel coding, etc. have been proposed to either overcome or alleviate these drawbacks of the Internet. But these techniques either need specialized...
Resource Type:: Masters Thesis

Update programming -- a safe approach to software maintenance

Creator:: Ren, Deling
Abstract:: Software maintenance accounts for a large portion of the software development cost, particularly the process of updating programs either to adapt for requirement change or to enhance design or efficiency. Currently, program updates are generally performed manually by programmers using text editors. This is an unreliable method because syntax and...
Resource Type:: Dissertation

Automatic program generation for scientific computing

Creator:: Fu, Zhe
Abstract:: The code reuse problem is a common software engineering problem in scientific computing. As a prevailing programming language in many scientific fields, Fortran does not provide support to address this problem. One particular reason is that Fortran lacks the support for generic programming. By applying program-generation techniques, we developed two...
Resource Type:: Dissertation

Anticipating impacts

Creator:: Hermens, Benjamin J.
Abstract:: We present an approach for generating a character’s response in anticipation of an impending impact. Protective anticipatory movement is built upon several simple actions that have been identified as response mechanisms in monkeys and in humans. These actions are parameterized by a model of the interaction based on the approaching...
Resource Type:: Masters Thesis

Information space mapping with adaptive multiplicatively weighted Voronoi diagrams

Creator:: Trubin, Stanislav I.
Abstract:: Traditional application of Voronoi diagrams for space partitioning creates Voronoi regions, with areas determined by the generators’ relative locations and weights. Especially in the area of information space (re)construction, however, there is a need for inverse solutions; i.e., finding weights that result in regions with predefined areas. In this thesis,...
Resource Type:: Masters Thesis

A data-driven model of pedestrian movement

Creator:: Casburn, Ledah
Abstract:: This thesis presents a model for simulating individual pedestrian motion based on empirical data. The model keeps track of a pedestrian’s position, orientation, and body configuration and leverages motion capture data to generate plausible motion. Our model can automatically incorporate a pedestrian’s physical limitations when making movement decisions, since it...
Resource Type:: Masters Thesis

Believable automotive flocking model

Creator:: McGregor, Jessica L.
Abstract:: The high cost of manually producing background characters creates a demand for a way to automatically generate plausible behaviors. These background extras need to behave in a manner that is believable such that they do not distract the focus of the audience from the primary action occurring in the scene....
Resource Type:: Honors College Thesis

Node and topology management for content distribution in source constraint networks

Creator:: Kolazhi, Krishnan
Abstract:: As broadband Internet becomes widely available, Peer-to-Peer (P2P) applications over the Internet are becoming increasingly popular. Such an example is a video multicast application in which, one source streams a video to a large number of destination nodes through an overlay multicast tree consisting of peers. These overlay multicast-based applications,...
Resource Type:: Masters Thesis

Implementing a comparative anatomy information system for the foundational model of anatomy and the mouse anatomy ontology

Creator:: Diatchka, Kremena S.
Abstract:: This thesis describes the implementation of an interface for querying established correspondences between anatomical structures across species. I was the main developer of this query engine, called the Comparative Anatomy Information System. My work involved developing methods to query the knowledge base, perform the specified comparison, display the anatomical hierarchies...
Resource Type:: Honors College Thesis

Efficient P2P media dissemination with forward error correction

Creator:: Do, Phuoc
Abstract:: Media application on the internet has become more and more popular as the bandwidth of the network links increase. The bottleneck of the existing media systems is no longer the link bandwidth at user’s end, but the server’s ability to handle streaming requests. These existing streaming systems do not scale...
Resource Type:: Honors College Thesis

Interactive football playbook

Creator:: Neumann, Christoph
Abstract:: This thesis presents a domain specific visual language designed to allow coaches to create content that exhibits the complex 2D interactions observed in the game of American football. Coaches can visually program the content by using symbols and drawing primitives similar to those that they currently use to design static...
Resource Type:: Masters Thesis

Efficient content distribution on source constraint networks: peer communication

Creator:: Kamath, Rohit Vinodanand
Abstract:: Popular applications such as P2P file sharing, multiplayer gaming, videoconferencing, etc. rely on the efficiency of content distribution from a single source to multiple receivers. Most users of these applications are on the widely prevalent source constraint networks such as the Digital Subscriber Line (DSL) and wireless networks. Overlay multicast...
Resource Type:: Masters Thesis

Supporting end-user debugging

Creator:: Kissinger, Cory
Abstract:: Although researchers have begun to explicitly support end-user programmers’ debugging by providing information to help them find bugs, there is little research addressing the right content to communicate to these users. The specific semantic content of these debugging communications matters because, if the users are not actually seeking the information...
Resource Type:: Masters Thesis

Model-based approximation methods for reinforcement learning

Creator:: Wang, Xin
Abstract:: The thesis focuses on model-based approximation methods for reinforcement learning with large scale applications such as combinatorial optimization problems. First, the thesis proposes two new model-based methods to stablize the value–function approximation for reinforcement learning. The first one is the BFBP algorithm, a batch-like reinforcement learning process which iterates between...
Resource Type:: Dissertation

Protein secondary structure prediction using conditional random fields and profiles

Creator:: Shen, Rongkun
Abstract:: Protein secondary structure prediction plays a pivotal role in predicting protein folding in three-dimensions. Its task is to assign each residue one of the three secondary structure classes helix, strand, or random coil. This is an instance of the problem of sequential supervised learning in machine learning. This thesis describes...
Resource Type:: Masters Thesis

Volume analysis and visualization

Creator:: Khare, Ankit
Abstract:: 3D datasets acquire great importance in the context of medical imaging. In this thesis we survey and enhance solutions to problems inherently associated with 3D datasets-processing time,noise and visualization. Efforts include development of a tool kit to provide a multi-threaded processing platform to cut processing time, produce real time visualization...
Resource Type:: Masters Thesis

A domain-specific embedded language for probabilistic programming

Creator:: Kollmansberger, Steven
Abstract:: Functional programming is concerned with referential transparency, that is, given a certain function and its parameter, that the result will always be the same. However, it seems that this is violated in applications involving uncertainty, such as rolling a dice. This thesis defines the background of probabilistic programming and domain-specific...
Resource Type:: Masters Thesis

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