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Title: Time-activity budgets and displacement rates in Florida manatees (Trichechus manatus) in the absence and presence of humans.
Creator: Abernathy, Jim., Florida Atlantic University, Adams, Ralph M.
Abstract/Description: The effects of human presence on displacement behavior and time-activity budgets of free-ranging manatees (Trichechus manatus) are poorly known. The congregation of manatees and human tourists in the warm waters of Crystal River, Florida, during the winter months offered a unique opportunity to study these effects. Focal animal sampling was used to gather behavioral data on manatees during randomly selected daylight sampling periods. Frequencies of displacement were correlated with numbers of...
Show moreThe effects of human presence on displacement behavior and time-activity budgets of free-ranging manatees (Trichechus manatus) are poorly known. The congregation of manatees and human tourists in the warm waters of Crystal River, Florida, during the winter months offered a unique opportunity to study these effects. Focal animal sampling was used to gather behavioral data on manatees during randomly selected daylight sampling periods. Frequencies of displacement were correlated with numbers of humans to determine if incidences of displacement were increased. Displacement increased with human presence. Maintenance and sexual behaviors decreased as human presence increased.
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Date Issued: 1995
PURL: http://purl.flvc.org/fcla/dt/15176
Subject Headings: Manatees--Florida, West Indian manatee--Florida, Human-animal relationships
Format: Document (PDF)

Title: Studies on traffic characteristics in asynchronous transfer mode telecommunications.
Creator: Abeygunawardana, Sumudi Man., Florida Atlantic University, Neelakanta, Perambur S., Hsu, Sam
Abstract/Description: This thesis is concerned with an outline survey on the modern aspects of asynchronous transmission mode (ATM) telecommunication; also considered are certain specific issues such as the performance characteristics of ATM-based telecommunication networks under fluctuating workloads. Estimation of the stochasticity of the jitter associated with the cell-delay arising out of buffering within the network as well as due to signal-to-noise considerations which induce bit-errors and eventually lead...
Show moreThis thesis is concerned with an outline survey on the modern aspects of asynchronous transmission mode (ATM) telecommunication; also considered are certain specific issues such as the performance characteristics of ATM-based telecommunication networks under fluctuating workloads. Estimation of the stochasticity of the jitter associated with the cell-delay arising out of buffering within the network as well as due to signal-to-noise considerations which induce bit-errors and eventually lead to cell-losses manifesting as delay(s) in the cells being transmitted, is also addressed as a part of this thesis efforts. Relevant theoretical models are proposed, algorithms are developed and simulations are done on the above considerations. Based on these efforts, inferential conclusions are drawn and discussed. Scope for future research and developments towards engineering design of softwares suitable for practical applications by ATM networking planners and traffic forecasters is indicated. Merits and shortcomings of the models are proposed and algorithmic approaches pursued in the present study are also specified with relevant discussions.
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Date Issued: 1996
PURL: http://purl.flvc.org/fcla/dt/15247
Subject Headings: Asynchronous transfer mode, Telecommunication--Traffic, Telematics
Format: Document (PDF)

Title: AFRICAN OR AFRICAN AMERICAN?: AN INVESTIGATION INTO THE INTERCULTURAL COMMUNICATION EXPERIENCES AND IDENTITIES OF AFRICAN INTERNATIONAL STUDENTS IN THE UNITED STATES.
Creator: Abidoye, Ronke, Poole, Deandre, Florida Atlantic University, School of Communication and Multimedia Studies, Dorothy F. Schmidt College of Arts and Letters
Abstract/Description: African international students continue to remain one of the least represented and studied groups of international students. In addition to the acculturative stress typically experienced by international students, African students inherit the marginalization of their racial/ethnic group in the United States. As such, scholars acknowledge the need for continued research into the experiences of African international students. Utilizing the Integrative Theory of Communication and Cross- Cultural...
Show moreAfrican international students continue to remain one of the least represented and studied groups of international students. In addition to the acculturative stress typically experienced by international students, African students inherit the marginalization of their racial/ethnic group in the United States. As such, scholars acknowledge the need for continued research into the experiences of African international students. Utilizing the Integrative Theory of Communication and Cross- Cultural Adaptation and elements of postcolonialism, this thesis explored the experiences of 10 African students in the United States. A qualitative analysis revealed that host receptivity, perceived cultural differences, expectations, and language/accents influenced intercultural communication. The challenges experienced in intercultural interactions allowed for the emergence of an intercultural identity such that the participants existed in a third space as intercultural Africans. This thesis adds to existing research on cross-cultural adaptation and negotiated identity, while also providing practical implications for schools.
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Date Issued: 2021
PURL: http://purl.flvc.org/fau/fd/FA00013717
Subject Headings: Students, Foreign, International students, African students--Foreign countries, Intercultural communication
Format: Document (PDF)

Title: Differences in Nurses’ Perceptions of Safety Culture, Nurse-Physician Collaboration, and Level of Job Satisfaction Related to the Type of Obstetrical Physician Service Delivery Model Utilized.
Creator: Abiri, Olga, Sherman, Rose O., Florida Atlantic University, Christine E. Lynn College of Nursing
Abstract/Description: Creating a safety culture is the focus in the current healthcare environment. An inhouse, around-the-clock laborist service delivery model has been associated with positive outcomes, but little is known about the laborist structure’s contribution to the labor-anddelivery working environment. The purpose of this descriptive correlational study was to explore the effects of physician service delivery model on safety culture, nurse-physician collaboration, and nurses’ job satisfaction. An...
Show moreCreating a safety culture is the focus in the current healthcare environment. An inhouse, around-the-clock laborist service delivery model has been associated with positive outcomes, but little is known about the laborist structure’s contribution to the labor-anddelivery working environment. The purpose of this descriptive correlational study was to explore the effects of physician service delivery model on safety culture, nurse-physician collaboration, and nurses’ job satisfaction. An additional purpose was to examine associations between nurses’ perceptions of safety culture, nurse-physician collaboration, and job satisfaction. Ray’s (1981, 1989) Theory of Bureaucratic Caring and Homan’s (1974) Social Exchange Theory guided this study. A survey consisting of demographic questions, the Collaborative Practice Scale (Weiss & Davis, 1985), the Hospital Survey on Patient Safety Culture (Agency for Healthcare Research and Quality, 2015; HSOPSC), and the McCloskey and Mueller Satisfaction Scale (McCloskey & Mueller, 1990) was distributed to registered nurses (RNs) nationwide. The results indicated that nurses in facilities using the around-the-clock model had higher perceptions of nursephysician collaboration, but not of safety culture or job satisfaction in relation to the physician service-delivery model. Significant moderate-to-strong correlations between nurses’ perceptions of patient safety and job satisfaction, and a weak correlation between bedside nurses’ perceptions of nurse-physician collaboration and job satisfaction were demonstrated. Additional significant correlations were found between the instrument subscales. Control/responsibility in the MMSS scale was positively associated with both management support for patient safety, supervisors’ and managers’ expectations and actions promoting patient safety, and overall perceptions of safety in the HSOPSC scale. Praise and recognition in the MMSS scale were positively associated with supervisor/manager expectations and actions promoting patient safety in the HSOPSC scale. Further appraisal is needed to understand the mechanism by which the laborist model affects patient care and work environment. Recommendations for future research include replicating the study with a larger sample sizes in specific groups based on the role and scheduled shift, conducting the study in a single system or location to mitigate the effects of other variables; and exploring physicians’ perspectives on the variables being studied.
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Date Issued: 2017
PURL: http://purl.flvc.org/fau/fd/FA00004969, http://purl.flvc.org/fau/fd/FA00004959
Subject Headings: Dissertations, Academic -- Florida Atlantic University, Obstetrics--Practice., Medical care--Safety measures., Nurse-physician collaboration., Nurses--Job satisfaction., Labor and delivery.
Format: Document (PDF)

Title: Temporal and spatial variation in habitat characteristics of tilefish (Lopholatilus chamaeleonticeps) off the east coast of Florida.
Creator: Able, Kenneth W., Grimes, Churchill B., Jones, Robert S., Twichell, David C., Harbor Branch Oceanographic Institute
Date Issued: 1993
PURL: http://purl.flvc.org/FCLA/DT/3172857
Subject Headings: Tilefish, Marine sediments --Florida, Carbonates, Sidescan sonar, Oceanographic submersibles
Format: Document (PDF)

Title: Object-oriented design of flexible manufacturing systems.
Creator: Abou-Haidar, Bassam., Florida Atlantic University, Fernandez, Eduardo B.
Abstract/Description: This thesis presents a systematic method for the design and modeling of flexible manufacturing systems, using object-oriented concepts and Petri nets. In the method proposed, we first define the system components in terms of an object model consisting of hierarchical sets of classes and operations. Secondly, we model the dynamic aspects of the system using statecharts, including exceptions. As a third step, we derive Petri nets from those statecharts to realize the concurrency present in the...
Show moreThis thesis presents a systematic method for the design and modeling of flexible manufacturing systems, using object-oriented concepts and Petri nets. In the method proposed, we first define the system components in terms of an object model consisting of hierarchical sets of classes and operations. Secondly, we model the dynamic aspects of the system using statecharts, including exceptions. As a third step, we derive Petri nets from those statecharts to realize the concurrency present in the system. Finally we develop a hierarchy of controllers, corresponding to the layers of the object model, for the independent components of the system based on the Petri nets obtained in the previous step.
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Date Issued: 1993
PURL: http://purl.flvc.org/fcla/dt/14989
Subject Headings: Petri nets, Flexible manufacturing systems, Object-oriented programming (Computer science), Real-time control
Format: Document (PDF)

Title: Bayesian approach to an exponential hazard regression model with a change point.
Creator: Abraha, Yonas Kidane, Qian, Lianfen, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Mathematical Sciences
Abstract/Description: This thesis contains two parts. The first part derives the Bayesian estimator of the parameters in a piecewise exponential Cox proportional hazard regression model, with one unknown change point for a right censored survival data. The second part surveys the applications of change point problems to various types of data, such as long-term survival data, longitudinal data and time series data. Furthermore, the proposed method is then used to analyse a real survival data.
Date Issued: 2014
PURL: http://purl.flvc.org/fau/fd/FA00004013
Subject Headings: Bayesian statistical decision theory, Mathematical statistics, Multivariate analysis -- Data processing
Format: Document (PDF)

Title: American lookback options: Early exercise.
Creator: Abramov, Viatcheslav Alexander., Florida Atlantic University, Yuhn, Ky-hyang, College of Business, Department of Economics
Abstract/Description: Lookback options are path dependent contingent claims whose payoff depend on the extrema of a given security's price over a given period. Some of these options are already traded on specialized markets (such as foreign exchange) and mostly in over-the-counter market alongside with other path dependent options (knock-ins, knock-outs, etc.). This thesis examines the existing pricing models of conventional options as well as standard European lookback options and provides some results about...
Show moreLookback options are path dependent contingent claims whose payoff depend on the extrema of a given security's price over a given period. Some of these options are already traded on specialized markets (such as foreign exchange) and mostly in over-the-counter market alongside with other path dependent options (knock-ins, knock-outs, etc.). This thesis examines the existing pricing models of conventional options as well as standard European lookback options and provides some results about early exercise of their American counterparts with the use of notions from the theory of optimal stopping.
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Date Issued: 1995
PURL: http://purl.flvc.org/fcla/dt/15177
Subject Headings: Options (Finance), Derivative securities
Format: Document (PDF)

Title: Malkes_Malkes: Malkes Malkes.
Creator: Abramovitch, Max
Abstract/Description: FAU Libraries Print Music Collection dates from circa 1890-present and includes original manuscripts from renowned, non-living Jewish composers, handwritten music from American and European-born cantors, and rare scores from major American Jewish publishing houses no longer in existence. It also houses one of the nation's largest collections of American Yiddish theater music, comprised of piano-vocal scores spanning the years 1890-1960. This digital collection contains select pieces from the...
Show moreFAU Libraries Print Music Collection dates from circa 1890-present and includes original manuscripts from renowned, non-living Jewish composers, handwritten music from American and European-born cantors, and rare scores from major American Jewish publishing houses no longer in existence. It also houses one of the nation's largest collections of American Yiddish theater music, comprised of piano-vocal scores spanning the years 1890-1960. This digital collection contains select pieces from the FAU Libraries Sheet Music Collection.
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Date Issued: 1907
PURL: http://purl.flvc.org/fau/fd/faupsm000086
Subject Headings: Sheet music, Yiddish songs
Format: Document (PDF)

Title: Malkes-Malkes.
Creator: Abramowitz, Max, Russotto, Henry A.
Date Issued: 1907
PURL: http://purl.flvc.org/fcla/dt/70757
Subject Headings: Piano, Voice
Format: Document (PDF)

Title: A case study of planning and implementing whole-school reform at a middle school.
Creator: Abramowitz, Rochelle., Florida Atlantic University, Maslin-Ostrowski, Patricia
Abstract/Description: The purpose of this study was to investigate the dilemmas of planning and implementing whole-school reform in a middle school from the perception of administrators, teachers and parents. A qualitative case study approach was used. Data collection included interviews, observations, and document analysis. Interviews with 28 participants were divided into three consecutive sessions conducted from the bottom up in terms of the hierarchy of power in the organization. Data were transcribed, coded,...
Show moreThe purpose of this study was to investigate the dilemmas of planning and implementing whole-school reform in a middle school from the perception of administrators, teachers and parents. A qualitative case study approach was used. Data collection included interviews, observations, and document analysis. Interviews with 28 participants were divided into three consecutive sessions conducted from the bottom up in terms of the hierarchy of power in the organization. Data were transcribed, coded, triangulated, and analyzed to understand the views of participants. The study resulted in three major findings: (a) The principal enhanced the learning organization's capacity for whole-school reform by balancing tensions and conflicts; (b) Implementing a high-stakes testing regime and reform design simultaneously contributed to teacher overload, and reduced the capacity of teachers to implement whole-school reform; and, (c) Learning communities had a pivotal role in fostering collaboration for whole-school reform. The study concluded that: (a) Principal leadership is vital to successful whole-school reform implementation; (b) The crucial challenge of principals in whole-school reform is forging a network of strong relationships within and across staff work teams and the community through the development of learning communities and professional development; and, (c) Whole-school reform must be balanced with and adapted to accountability system if it is to have a chance of succeeding.
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Date Issued: 2004
PURL: http://purl.flvc.org/fcla/dt/12080
Subject Headings: Middle school education, Educational change, Educational leadership, School management and organization
Format: Document (PDF)

Title: Out with the “I” and In with the “Kin”: Environmental Activism Through Speculative Fiction.
Creator: Abreu Toribio, Mailyn, MacDonald, Ian P., Florida Atlantic University, Dorothy F. Schmidt College of Arts and Letters, Department of English
Abstract/Description: Non-Anglophone voices in literature can lead to a better understanding of the intricate relationships shown by Ashley Dawson tying capitalism, slow violence, and uneven development to climate change. There is skepticism that science fiction (sf) in particular can properly present climate issues in the anthropocentric era that we live in today, but scholars such as Shelley Streeby argue against such perceptions. Science fiction writers that use magical realism, such as Ngugi wa Thiong’o and...
Show moreNon-Anglophone voices in literature can lead to a better understanding of the intricate relationships shown by Ashley Dawson tying capitalism, slow violence, and uneven development to climate change. There is skepticism that science fiction (sf) in particular can properly present climate issues in the anthropocentric era that we live in today, but scholars such as Shelley Streeby argue against such perceptions. Science fiction writers that use magical realism, such as Ngugi wa Thiong’o and Nalo Hopkinson, as ecological sf have already accomplished the task of creating speculative works that fit in perfectly under the umbrella of “serious fictions.” These writers work from a non-Anglophone perspective or from a minority group within a Western society, allowing for different modes of thinking to play a part in these bigger discourses. Writers, educators, and other scholars need to reestablish humanity’s kinship with nature.
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Date Issued: 2019
PURL: http://purl.flvc.org/fau/fd/FA00013178
Subject Headings: Speculative fiction, Dawson, Ashley, 1965-, Activists, Anthropogenic effects on nature
Format: Document (PDF)

Title: Junior Voice Recital by Edgar M. Abreu (tenor) - Spring 2010.
Creator: Abreu, Edgar (Tenor), Lertsintupun, Sumpun (Piano), FAU Department of Music
Date Issued: 2010-04-23
PURL: http://purl.flvc.org/fau/fd/FADT3165697
Subject Headings: Vocal music, Piano music
Format: Set of related objects

Title: Some graph connectivity conditions and their implications.
Creator: Abreu, Marien, Florida Atlantic University, Locke, Stephen C.
Abstract/Description: This dissertation studies two independent problems, each related to a special connectivity condition in a simple graph. The first is a distance-degree condition called cohesion. Given a tree T with n vertices, we analyze the minimum integer f(T) = k, in terms of n, for which any connected k-cohesive graph G contains a copy of T, such that G-V(T) is connected. The problem comes from a generalization of an exercise by Lovasz [L7] in which it is shown that f(K2) = 5. Locke, Tracy and Voss [L5]...
Show moreThis dissertation studies two independent problems, each related to a special connectivity condition in a simple graph. The first is a distance-degree condition called cohesion. Given a tree T with n vertices, we analyze the minimum integer f(T) = k, in terms of n, for which any connected k-cohesive graph G contains a copy of T, such that G-V(T) is connected. The problem comes from a generalization of an exercise by Lovasz [L7] in which it is shown that f(K2) = 5. Locke, Tracy and Voss [L5] have proved that in general f(T) > 2n, and in the case in which T is a path, equality is attained. Also Locke [L5.1] proved that f(T) < 4n. Here we improve the upper bound to 4n-6 when T is not a path and to 2n + 2 when T has diameter at most 4. In the particular case of K1,3 we show that f(K1,3) = 2n = 8 is attained. The conjecture that remains open is whether f(T) = 2n for any tree T on n vertices. The second problem studied here is a particular case of the well known relation between the path-connectivity and a set of long cycles, which generate the cycle space of a simple graph. The main conjecture in this topic is by Bondy [B1], and states that if G is a 3-connected graph, with minimum degree at least d and with at least 2d vertices, then every cycle of G can be written as the symmetric difference of an odd number of cycles, each of whose lengths are at least 2d-1. Hartman [H2], Locke [L1, L2, L3], Barovich [BL] and Teng [L6] have proved results related to this conjecture. Here we show that 2-connected, 6-path-connected graphs with at least 9 vertices and minimum degree at least 3 are 6-generated. And more generally, we prove that if a graph G is 2-connected, k-path-connected, and contains a long cycle, then G is (k + 1)-generated, up to some cases which are characterized. The conjecture [L3] of whether, for some constant m, 1/2 < m < 1, every k-path-connected graph is mk-generated, remains open.
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Date Issued: 2003
PURL: http://purl.flvc.org/fcla/dt/12030
Subject Headings: Trees (Graph theory), Paths and cycles (Graph theory)
Format: Document (PDF)

Title: Remote labs: Active element IV characteristics.
Creator: Abu-El Humos, Ali M., Florida Atlantic University, Alhalabi, Bassem A.
Abstract/Description: This thesis proposes the use of remote laboratory experiments in distance education. Remote labs combine both the convenience of distance education and the effectiveness of the traditional physical campus labs. Moreover, this research studies the different hardware and software technologies that would make remote lab experimentation feasible in terms of cost and quality. The focus in this thesis is how to use BS2 with Microsoft ASP and COM technologies to build a remote lab experiment with...
Show moreThis thesis proposes the use of remote laboratory experiments in distance education. Remote labs combine both the convenience of distance education and the effectiveness of the traditional physical campus labs. Moreover, this research studies the different hardware and software technologies that would make remote lab experimentation feasible in terms of cost and quality. The focus in this thesis is how to use BS2 with Microsoft ASP and COM technologies to build a remote lab experiment with minimum hardware and software cost, while maintaining satisfactory on-line experiment quality. Remote labs is a creative innovation in the world of distance education. This thesis is based on the pioneering work of Dr. Alhalabi and Dr. Hamza.
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Date Issued: 2002
PURL: http://purl.flvc.org/fcla/dt/12939
Subject Headings: Distance education, Internet in higher education, Scientific apparatus and instruments--Computer simulation
Format: Document (PDF)

Title: Low latency and energy efficient MAC protocols for wireless sensor networks.
Creator: Abu-El Humos, Ali M., Florida Atlantic University, Alhalabi, Bassem A., Cardei, Mihaela, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description: Energy consumption is a critical design issue in Wireless Sensor Networks (WSNs), since sensor nodes are battery operated, and replacing or recharging the battery is usually infeasible. Energy efficient solutions are sought at all network levels, especially at the medium access level. The IEEE 802.11 MAC protocol is optimized for Ad hoc Wireless Networks, but cannot be adopted for WSNs because it has the idle listening problem, which is a major source of energy waste. Several Medium Access...
Show moreEnergy consumption is a critical design issue in Wireless Sensor Networks (WSNs), since sensor nodes are battery operated, and replacing or recharging the battery is usually infeasible. Energy efficient solutions are sought at all network levels, especially at the medium access level. The IEEE 802.11 MAC protocol is optimized for Ad hoc Wireless Networks, but cannot be adopted for WSNs because it has the idle listening problem, which is a major source of energy waste. Several Medium Access Control (MAC) protocols have been proposed for WSNs to save the transceiver energy by introducing periodic listen/sleep cycles, and thus overcome the idle listing problem. The periodic listen sleep cycles, however, will increase the network latency and require extra overhead to establish and maintain synchronization among nodes in the network. This dissertation introduces a new MAC protocol for WSNs based on the SMAC protocol to improve its latency performance without compromising its energy consumption. The original SMAC provides an efficient solution for the energy consumption problem due to idle listening, but it increases latency especially in low duty cycle applications. TMAC was proposed to further reduce the energy consumption in SMAC and introduced the Forward Request-To-Send (FRTS) packet to solve the early sleep problem observed in TMAC. Later, Adaptive SMAC was proposed to reduce the latency problem in SMAC by at least 50% at light traffic load. Our new protocol, FASMAC, combines the advantages of both adaptive listening and the usage of FRTS packet in TMAC to further reduce the latency of SMAC. In FASMAC, a packet can travel at least three hops away from its source node within one time cycle. This results in at least 67% reduction in latency at light traffic when compared with the original SMAC. We also propose an energy model for performance evaluation of WSNs protocols using the network simulator NS2. The current energy model of NS2 was designed to handle Ad hoc Wireless Networks where the low power consumption sleep mode was not an issue. However, this is not the case in WSNs. We show that NS2 energy model is not suitable to evaluate the performance of WSNs protocols because it does not account for the low power sleep mode. This dissertation proposes a solution to this deficiency and provides simulation results that match real experimental results performed on the actual sensor motes.
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Date Issued: 2005
PURL: http://purl.flvc.org/fcla/dt/12149
Subject Headings: Wireless communication systems, Sensor networks, Power resources--Efficiency
Format: Document (PDF)

Title: Selected TLR Agonists Act in Synergy to Reprogram DC-NK Cross-talk and Generate Effector T cells in Nicotinic Environment.
Creator: Abu-Nuwar, Emily, Tamjidi, Saba, Nouri-Shirazi, Mahyar, Office of Undergraduate Research and Inquiry
Abstract/Description: The magnitude of immune responses to vaccination is a critical factor in determining protection from diseases. We reported that nicotine disrupts the properties of DCs that are pivotal in the initiation of immune response to vaccines. Here we investigated whether TLR agonist(s) could overcome the effects of nicotine on human DC and DC-NK cross-talk essential for effector T cell generation. nicDC, nicDC-NK, and nicDC-NK-T cultures exposed to TLR agonists were evaluated for expression of...
Show moreThe magnitude of immune responses to vaccination is a critical factor in determining protection from diseases. We reported that nicotine disrupts the properties of DCs that are pivotal in the initiation of immune response to vaccines. Here we investigated whether TLR agonist(s) could overcome the effects of nicotine on human DC and DC-NK cross-talk essential for effector T cell generation. nicDC, nicDC-NK, and nicDC-NK-T cultures exposed to TLR agonists were evaluated for expression of costimulatory molecules, cytokines, and intracellular cytokine IFN-g using ELISA and flow cytometry. Our data shows that among the TLR agonists, TLR3 and TLR8/7 synergistically optimized nicDC maturation co-cultured NK cell activation. Importantly, similar to DC-NK, nicDC-NK treated with TLR3 and TLR8/7 and co-cultured with naïve T cells promoted a comparable number of effector T cells. Our data suggest that the addition of appropriate TLR agonist(s) to vaccine formulation could potentially improve the smokers’ immune response to vaccination.
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Date Issued: 2016
PURL: http://purl.flvc.org/fau/fd/FA00005554
Subject Headings: College students --Research --United States.
Format: Document (PDF)

Title: Studies on nonlinear activity and cross-entropy considerations in neural networks.
Creator: Abusalah, Salahalddin Tawfiq., Florida Atlantic University, Neelakanta, Perambur S., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description: The objectives of this research as deliberated in this dissertation are two-folded: (i) To study the nonlinear activity in the neural complex (real and artificial) and (ii) to analyze the learning processe(s) pertinent to an artificial neural network in the information-theoretic plane using cross-entropy error-metrics. The research efforts envisaged enclave the following specific tasks: (i) Obtaining a general solution for the Bernoulli-Riccati equation to represent a single parameter family...
Show moreThe objectives of this research as deliberated in this dissertation are two-folded: (i) To study the nonlinear activity in the neural complex (real and artificial) and (ii) to analyze the learning processe(s) pertinent to an artificial neural network in the information-theoretic plane using cross-entropy error-metrics. The research efforts envisaged enclave the following specific tasks: (i) Obtaining a general solution for the Bernoulli-Riccati equation to represent a single parameter family of S-shaped (sigmoidal) curves depicting the nonlinear activity in the neural network. (ii) Analysis of the logistic growth of output versus input values in the neural complex (real and artificial) under the consideration that the boundaries of the sets constituting the input and output entities are crisp and/or fuzzy. (iii) Construction of a set of cross-entropy error-metrics (known as Csiszar's measures) deduced in terms of the parameters pertinent to a perceptron topology and elucidation of their relative effectiveness in training the network optimally towards convergence. (iv) Presenting the methods of symmetrizing and balancing the aforesaid error-entropy measures (in the information-theoretic plane) so as to make them usable as error-metrics in the test domain. (v) Description and analysis of the dynamics of neural learning process in the information-theoretic plane for both crisp and fuzzy attributes of input values. Relevant to these topics portraying the studies on nonlinear activity and cross-entropy considerations vis-a-vis neural networks, newer and/or exploratory inferences are made, logical conclusions are enumerated and relative discussions are presented along with the scope for future research to be pursued.
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Date Issued: 1996
PURL: http://purl.flvc.org/fcla/dt/12447
Subject Headings: Neural networks (Computer science), Entropy (Information theory), Nonlinear control theory
Format: Document (PDF)

Title: Resource-sensitive intrusion detection models for network traffic.
Creator: Abushadi, Mohamed E., Florida Atlantic University, Khoshgoftaar, Taghi M.
Abstract/Description: Network security is an important subject in today's extensively interconnected computer world. The industry, academic institutions, small and large businesses and even residences are now greatly at risk from the increasing onslaught of computer attacks. Such malicious efforts cause damage ranging from mere violation of confidentiality and issues of privacy up to actual financial loss if business operations are compromised, or even further, loss of human lives in the case of mission-critical...
Show moreNetwork security is an important subject in today's extensively interconnected computer world. The industry, academic institutions, small and large businesses and even residences are now greatly at risk from the increasing onslaught of computer attacks. Such malicious efforts cause damage ranging from mere violation of confidentiality and issues of privacy up to actual financial loss if business operations are compromised, or even further, loss of human lives in the case of mission-critical networked computer applications. Intrusion Detection Systems (IDS) have been used along with the help of data mining modeling efforts to detect intruders, yet with the limitation of organizational resources it is unreasonable to inspect every network alarm raised by the IDS. Modified Expected Cost of Misclassification ( MECM) is a model selection measure that is resource-aware and cost-sensitive at the same time, and has proven to be effective for the identification of the best resource-based intrusion detection model.
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Date Issued: 2003
PURL: http://purl.flvc.org/fcla/dt/13054
Subject Headings: Computer networks--Security measures--Automation, Computers--Access control, Data mining, Computer security
Format: Document (PDF)

Title: Trim analysis by shooting and finite elements and Floquet eigenanalysis by QR and subspace iterations in helicopter dynamics.
Creator: Achar, Nagari Shriranga., Florida Atlantic University, Gaonkar, Gopal H., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: The trim analysis for the initial state and control inputs that satisfy response periodicity and flight conditions, and the Floquet eigenanalysis for a few largest eigenvalues of the Floquet transition matrix (FTM) are investigated. In the trim analysis, the convergence of Newton iteration is investigated in computing the periodic initial state and control inputs sequentially and in parallel. The trim analysis uses the shooting method and two h-versions of temporal finite element methods, one...
Show moreThe trim analysis for the initial state and control inputs that satisfy response periodicity and flight conditions, and the Floquet eigenanalysis for a few largest eigenvalues of the Floquet transition matrix (FTM) are investigated. In the trim analysis, the convergence of Newton iteration is investigated in computing the periodic initial state and control inputs sequentially and in parallel. The trim analysis uses the shooting method and two h-versions of temporal finite element methods, one based on displacement formulation and the other on mixed formulation of displacements and momenta. In each method, both the sequential and in-parallel schemes are used, and the resulting nonlinear equations are solved by damped Newton iteration with an optimally selected damping parameter. The reliability of damped Newton iteration, including earlier-observed divergence problems, is quantified by the maximum condition number of the Jacobian matrices of the iterative scheme. For illustrative purposes, rigid flap-lag and flap-lag-torsion models based on quasisteady aerodynamics are selected. Demanding trim analysis conditions are included by considering advance ratios or dimensionless flight speeds twice as high as those of current helicopters. Concerning the Floquet eigenanalysis, the feasibility of using the Arnoldi-Saad method, one of the emerging subspace iteration methods, is explored as an alternative to the currently used QR method, which is not economical for partial eigenanalysis. The reliability of the Arnoldi-Saad method is quantified by the eigenvalue condition numbers and the residual errors of the eigenpairs. In the three trim analysis methods, while the optimally selected damping parameter provides almost global convergence, the in-parallel scheme requires much less machine time than the conventional sequential scheme; both schemes have comparable reliability of the Newton iteration without and with damping. The Arnoldi-Saad method takes much less machine time than the QR method with comparable reliability.
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Date Issued: 1992
PURL: http://purl.flvc.org/fcla/dt/12297
Subject Headings: Helicopters--Dynamics, Helicopters--Handling characteristics, Stability of helicopters--Mathematical models
Format: Document (PDF)

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