Digital Commons Network^™

Motivated Learning As An Extension Of Reinforcement Learning, Janusz Starzyk, Pawel Raif, Ah-Hwee Tan

Research Collection School Of Computing and Information Systems

We have developed a unified framework to conduct computational experiments with both learning systems: Motivated learning based on Goal Creation System, and reinforcedment learning using RL Q-Learning Algorithm. Future work includes combining motivated learning to set abstract motivations and manage goals with reinforcement learning to learn proper actions. This will allow testing of motivated learning on typical reinforcement learning benchmarks with large dimensionality of the state/action spaces.

Clinicopathological Findings Of Suspected Canine Leptospirosis Presented At The Up Veterinary Teaching Hospital Diliman Station (January To December 2009), Maan Joy Serafica Malazo

Undergraduate Theses

No abstract provided.

Characterization Of Guard Hairs From Different Body Regions In The Philippine Native Pig (Sus Domesticus) Using Scanning Electron Microscopy, Ross Antonio R. Banayo

Undergraduate Theses

No abstract provided.

Antibiotic Sensitivity Testing Of Isolated Escherichia Coli And Salmonella Spp. From Environmental Swabs, Feeds And Vectors In Broilers And Layers Farms From Batangas And Laguna, Chloe Anne Villaruel

Undergraduate Theses

No abstract provided.

Immunohistochemical Demonstration Of S100 In The Lung Of Philippines Swamp Buffalo (Bubalus Bubalis Carabensis), Abigail Joyce G. Tuzon

Undergraduate Theses

No abstract provided.

Crctol: A Semantic Based Domain Ontology Learning System, Xing Jiang, Ah-Hwee Tan

Research Collection School Of Computing and Information Systems

Domain ontologies play an important role in supporting knowledge‐based applications in the Semantic Web. To facilitate the building of ontologies, text mining techniques have been used to perform ontology learning from texts. However, traditional systems employ shallow natural language processing techniques and focus only on concept and taxonomic relation extraction. In this paper we present a system, known as Concept‐Relation‐Concept Tuple‐based Ontology Learning (CRCTOL), for mining ontologies automatically from domain‐specific documents. Specifically, CRCTOL adopts a full text parsing technique and employs a combination of statistical and lexico‐syntactic methods, including a statistical algorithm that extracts key concepts from a document collection, …

Information Technology Diffusion With Influentials, Imitators, And Opponents: Model And Preliminary Evidence, Hasan Cavusoglu, Nan Hu, Yingjiu Li, Dan Ma

Research Collection School Of Computing and Information Systems

Information technology (IT) innovations follow a diverse set of diffusion patterns. Early diffusion models explaining technology diffusion patterns assumed that there is a single homogeneous segment of potential adopters. It was later shown that a two-segment model considering two groups of adopters explains variations in diffusion patterns better than the existing one-segment models. While the two-segment model considers a group of adopters promoting adoption by exerting a positive influence on prospective adopters, it does not consider the members of society who aim to inhibit the adoption process by exerting a negative influence on prospective adopters. In fact, most IT innovations …

Modeling Anticipatory Event Transitions, He Qi, Kuiyu Chang, Ee Peng Lim

Research Collection School Of Computing and Information Systems

Major world events such as terrorist attacks, natural disasters, wars, etc. typically progress through various representative stages/states in time. For example, a volcano eruption could lead to earthquakes, tsunamis, aftershocks, evacuation, rescue efforts, international relief support, rebuilding, and resettlement, etc. By analyzing various types of catastrophical and historical events, we can derive corresponding event transition models to embed useful information at each state. The knowledge embedded in these models can be extremely valuable. For instance, a transition model of the 1918-1920 flu pandemic could be used for the planning and allocation of resources to decisively respond to future occurrences of …

Dual Phase Learning For Large Scale Video Gait Recognition, Jialie Shen, Hwee Hwa Pang, Dacheng Tao, Xuelong Li

Research Collection School Of Computing and Information Systems

Accurate gait recognition from video is a complex process involving heterogenous features, and is still being developed actively. This article introduces a novel framework, called GC2F, for effective and efficient gait recognition and classification. Adopting a ”refinement-and-classification” principle, the framework comprises two components: 1) a classifier to generate advanced probabilistic features from low level gait parameters; and 2) a hidden classifier layer (based on multilayer perceptron neural network) to model the statistical properties of different subject classes. To validate our framework, we have conducted comprehensive experiments with a large test collection, and observed significant improvements in identification accuracy relative to …

Introducing Communication In Dis-Pomdps With Locality Of Interaction, Makoto Tasaki, Yuichi Yabu, Yuki Iwanari, Makoto Yokoo, Janusz Marecki, Pradeep Reddy Varakantham, Milind Tambe

Research Collection School Of Computing and Information Systems

The Networked Distributed POMDPs (ND-POMDPs) can model multiagent systems in uncertain domains and has begun to scale-up the number of agents. However, prior work in ND-POMDPs has failed to address communication. Without communication, the size of a local policy at each agent within the ND-POMDPs grows exponentially in the time horizon. To overcome this problem, we extend existing algorithms so that agents periodically communicate their observation and action histories with each other. After communication, agents can start from new synchronized belief state. Thus, we can avoid the exponential growth in the size of local policies at agents. Furthermore, we introduce …

Anonymous Query Processing In Road Networks, Kyriakos Mouratidis, Man Lung Yiu

Research Collection School Of Computing and Information Systems

The increasing availability of location-aware mobile devices has given rise to a flurry of location-based services (LBSs). Due to the nature of spatial queries, an LBS needs the user position in order to process her requests. On the other hand, revealing exact user locations to a (potentially untrusted) LBS may pinpoint their identities and breach their privacy. To address this issue, spatial anonymity techniques obfuscate user locations, forwarding to the LBS a sufficiently large region instead. Existing methods explicitly target processing in the euclidean space and do not apply when proximity to the users is defined according to network distance …

Does Co-Opetition Change The Game? A Bayesian Analysis Of Participation Strategy In An Industry Standard-Setting Organization, Robert J. Kauffman, Benjamin B. M. Shao, Juliana Y. Tsai

Research Collection School Of Computing and Information Systems

Across different industries, we observe the emergence of industry standard-setting organizations (SSO) that focus on the creation of industry-specific process standards. Firms adopt a strategy of co-opetition, the combination of cooperation and competition, during standards development. We propose that a firm's co-opetition strategy is revealed to some extent by when it elects to participate in an industry SSO. Bayesian information updating offers an effective empirical modeling perspective for studying firms' participation strategies when managers' beliefs and uncertainties are factored into their decision-making. We analyze a panel data set of 73 U.S. public firms over a 20-year period. These firms are …

A Boosting Framework For Visuality-Preserving Distance Metric Learning And Its Application To Medical Image Retrieval, Yang Liu, Rong Jin, Lily Mummert, Rahul Sukthankar, Adam Goode, Bin Zheng, Steven C. H. Hoi, Mahadev Satyanarayanan

Research Collection School Of Computing and Information Systems

Similarity measurement is a critical component in content-based image retrieval systems, and learning a good distance metric can significantly improve retrieval performance. However, despite extensive study, there are several major shortcomings with the existing approaches for distance metric learning that can significantly affect their application to medical image retrieval. In particular, "similarity" can mean very different things in image retrieval: resemblance in visual appearance (e.g., two images that look like one another) or similarity in semantic annotation (e.g., two images of tumors that look quite different yet are both malignant). Current approaches for distance metric learning typically address only one …

The Monetary Value Of Virtual Goods: An Exploratory Study In Mmorpgs, Qiu-Hong Wang, Viktor Mayer-Schonberger

Research Collection School Of Computing and Information Systems

This study investigates the monetary value of time spent in virtual worlds in the context of 24 most popular MMORPGs Building on classic economic theory, we approach this issue through a combination of theoretical modeling, experiment, and cross-sectional time series data analysis. Our findings suggest that intensive social networking and flatter social hierarchy structures are associated with lower monetary value of time spent in-game. Further, two opposite network effects on the monetary value of in-game time spent were observed. One is the positive network effect from the active user base, the other is the negative network effect from the intensity …

Realist Painting And Its Relationship To My Creative Practice, Xuning Wang

Theses: Doctorates and Masters

This thesis examines the realist art movement from its origins in France in the 1840s to its development in China in the 20th century and its impact on the author as an artist. The thesis reviews the development of realism in France, and traces its impact on Chinese conceptions of realism in the 20th century. The contemporary debates surrounding realism in China are examined and contextualised within the recent history of realism in China. Finally the thesis looks at the impact of realism on the author’s creative practice and a case is argued for the development of realist ideas in …

Infusing Critical Thinking Into An Employability Skills Program: The Effectiveness Of An Immersion Approach, Sophie Kennedy

Theses: Doctorates and Masters

The demands of the knowledge economy have placed renewed emphasis on graduate employability and the development of higher-order thinking skills. Preparing graduates for the workplace requires new instructional approaches to develop a matrix of interrelated skills. This study investigates an immersion approach to developing employability skills with emphasis on the infusion of critical thinking skills in an undergraduate business degree.

The research is situated within the pragmatic paradigm and comprises a mixed methods approach. Analyses of project instructions, student reflections and test scores are presented in an explanatory case study in three parts: the infusion of critical thinking skills in …

The (Un)Written Heart In Brecht’S Baal And Journeys Of The God Of Happiness : Heart Matters In The Development Of A Playwright And His Ideas On Acting, Ralf G. Rauker

Theses: Doctorates and Masters

In the 1918 and 1919 versions of his play Baal, Brecht had used
autobiographical material about a heart problem that he suffered from and
had recorded in his diaries since 1913. When he revised the 1919 version
and the play was first published in 1922, it seemed that this very personal
connection had disappeared. An observable shift in his work began to take
place, which led to his adopting an apparently unambiguous rationalist take
on theatre. However, his extremely critical, sometimes polemical position on
the intertwined subject of heart and emotions raises questions about the
motivations for the move towards …

Risking Returns: Moving From Public To Private Equity, Aurobindo Ghosh

Research Collection School Of Economics

The notion of risk identifies a project that matches with the risk appetite of an entrepreneur not necessarily the investors. This can explain why entrepreneurs would start up companies but it cannot explain why ex-post the investors continue, given that a diversified portfolio of publicly traded assets could potentially generate similar return with lower risk. We re-evaluate the evidence through performance measures using relative probability distributions of public and private equity funds, and identify the nature of the deviations. We observe that the heterogeneity in different investor classes are greatly reduced using standard covariates to identify the choice between public …

Corporate Social Responsibility And The Legal Profession, Eugene K. B. Tan

Research Collection Yong Pung How School Of Law

No abstract provided.

Managing Female Foreign Domestic Workers In Singapore: Economic Pragmatism, Coercive Legal Regulation, Or Human Rights, Eugene K. B. Tan

Research Collection Yong Pung How School Of Law

Singapore's immigration discourse is deeply influenced by its need to “right-size” its population. As a society that has and remains in need of immigration, contemporary immigration and globalization have rigorously challenged the conventional thinking and understanding of citizenship, as well as notions of who belongs and who does not. Nevertheless, international marriages and pervasive in-and out-migration for purposes of employment, study, and family, conspire to make more pronounced the decoupling of citizenship and residence in Singapore. This transnational dimension sits uncomfortably with the policy makers' desire for, and the imperatives of, state sovereignty, control, and jurisdiction.Although one quarter of people …

Breaking Bad News: Effect Of Physician Communication On Analog Patients' Response, Emily Porensky

All Theses and Dissertations (ETDs)

Breaking bad news is a difficult, yet unavoidable part of healthcare for physicians and patients alike. Although expert opinion suggests that certain strategies for breaking bad news may be better than others, there is little methodologically rigorous research to support current guidelines. This study used an experimental paradigm to test two communication strategies, forecasting bad news and framing prognostic information, when giving people a life-limiting diagnosis of colon cancer. Videotapes depicted a physician disclosing a diagnosis of cancer and discussing prognosis. Participants: N = 128) were asked to imagine they were going to see a doctor for physical symptoms they …

Parties, Committees, And Rules In The U.S. House Of Representatives, Hong Min Park

All Theses and Dissertations (ETDs)

This dissertation project aims to build upon the literature of positive theories of legislative politics, and provide three more nuanced stories about various stages in the U.S. House of Representatives: rules making, committee composition, and floor voting. The chapter, Conditional Nature of Rules Changes, examines why the U.S. House of Representatives has changed its standing rules regarding the principle of majority rule and minority rights. I begin by taking a critical look at previous studies on this subject, after which I propose an alternative theory on the conditional nature of rules changes. The empirical findings reveal that different combinations of …

Minding The Gap: Rethinking The Perceived Disjuncture Between Rurality And Homosexuality, Jessica Harris

All Theses and Dissertations (ETDs)

No abstract provided.

Enhancing Nonlinear Ultrasonic Methods For Laboratory And Clinical Applications, Christopher Lloyd

All Theses and Dissertations (ETDs)

This thesis addresses the underlying physics associated with nonlinear ultrasonic field propagation, measurements of the nonlinear properties of materials, and mechanisms contributing to the observed systematic variation of backscattered ultrasonic energy from the heart over the heart cycle. Studies were performed to address the reliability of the methods of measurement used for the quantitative characterization of nonlinear phenomena and to explore the utility of these methods. This thesis examines the measurement of nonlinear acoustic properties of materials using several methods, including the transmission of ultrasound through the material, as well as the backscattered signal from a region of interest within …

Culture And Exchange: The Jews Of Königsberg, 1700-1820, Jill Storm

All Theses and Dissertations (ETDs)

This dissertation traces the history of the Jewish community in Königsberg, East Prussia, from its founding in 1700 to the aftermath of the Prussian Emancipation Edict of 1812, as well as the early stages of Jewish embourgeoisement and political integration. My project combines aspects of a traditional communal history with newer trends in Jewish history, including an integrated discussion of economic and cultural life. I argue that the commercial successes of the Jewish mercantile elite in Königsberg, in particular of the Friedländer family, set the stage for the publication of ha-Measef and the local flowering of the haskalah. Moreover, I …

Essays In Corporate Finance, Kangzhen Xie

All Theses and Dissertations (ETDs)

This dissertation studies the effects of information asymmetry, financial constraints and stock market valuation on the behavior of firms. The first essay explores the role of deal initiation and bidder asymmetry in determining the use of auction and target premia in merges and acquisitions. The second essay examines the behavior of the segments of conglomerates and single segment firms in the distressed industries. The third essay investigates the incentive of takeover arising from the temporary disparity of stock valuation. While half of all acquisition targets are sold in negotiated deals with only one buyer rather than by auction, the wealth …

Modeling Aerial Refueling Operations, Allen Mccoy

All Theses and Dissertations (ETDs)

Aerial Refueling: AR) is the act of offloading fuel from one aircraft: the tanker) to another aircraft: the receiver) in mid flight. Meetings between tanker and receiver aircraft are referred to as AR events and are scheduled to: escort one or more receivers across a large body of water; refuel one or more receivers; or train receiver pilots, tanker pilots, and boom operators. In order to efficiently execute the Aerial Refueling Mission, the Air Mobility Command: AMC) of the United States Air Force: USAF) depends on computer models to help it make tanker basing decisions, plan tanker sorties, schedule aircraft, …

The Design And Implementation Of An Extensible Brain-Computer Interface, Scott Burns

All Theses and Dissertations (ETDs)

An implantable brain computer interface: BCI) includes tissue interface hardware, signal conditioning circuitry, analog-to-digital conversion: ADC) circuitry and some sort of computing hardware to discriminate desired waveforms from noise. Within an experimental paradigm the tissue interface and ADC hardware will rarely change. Recent literature suggests it is often the specific implementation of waveform discrimination that can limit the usefulness and lifespan of a particular BCI design. If the discrimination techniques are implemented in on-board software, experimenters gain a level of flexibility not currently available in published designs. To this end, I have developed a firmware library to acquire data sampled …

Piezoelectric Control Of Structures Prone To Instabilities, Sunjung Kim

All Theses and Dissertations (ETDs)

Thin-walled structures such as stiffened panels fabricated out of high strength materials are ubiquitous in aerospace structures. These are prone to buckle in a variety of modes with strong possibility of adverse interaction under axial compression and/or bending. Optimally designed stiffened panels, at an appropriate combination of axial compression and suddenly applied lateral pressure undergo large amplitude oscillations and may experience divergence. Under aerodynamic loading, they can experience flutter instability with the amplitudes of oscillations attaining a limit: LCO) or escalating without any limit. Control of structures prone to these forms of instability using piezo-electric actuators is the theme of …

Proteomics Assisted Discovery Of Novel Proteins In Assembly And Regulation Of Photosystem Ii, Kimberly Wegener

All Theses and Dissertations (ETDs)

Cyanobacteria, the only prokaryotes capable of oxygenic photosynthesis, are present in diverse ecological niches and play crucial roles in global carbon and nitrogen cycles. To proliferate in nature, cyanobacteria utilize a host of stress responses to maintain photosynthesis under periodic changes in environmental conditions. Recent advances in proteomic study have enabled a systems-level analysis of cellular functions in many systems. Because proteins are directly responsible for cellular functions, measurements of protein abundances provide significant clues to the modulation of cellular functions during different environmental perturbations. A detailed knowledge of the composition of, as well as the dynamic changes in, the …