Thesis advisor: Dorothy A. Jones / The purpose of this qualitative research study was to answer the following questions: What is the life pattern manifested by individuals caring for spouses who have had coronary artery bypass surgery? What are the thematic expressions of life patterns among individuals caring for spouses who have had coronary artery bypass surgery? The theoretical framework guiding this study was Margaret Newman’s Health as Expanding Consciousness. The research method created by Newman facilitated the understanding of the individual participant’s experience, pattern identification, similarities in pattern across participants and the potential for expansion of consciousness. The study sample included ten women and two men whose spouses were recovering at home following cardiac surgery. These twelve spousal caregivers shared their life stories and their spousal caregiving experience in the first two weeks at home following their spouses discharge from the hospital. There were various levels of potential for expansion of consciousness for these spousal caregivers. Looking across participants six themes emerged from the data. First, disruption in the spousal caregivers’ roles and responsibilities impacts the relationship between the spousal caregivers and their spouses and shifts life patterns. Second, spousal caregivers face coping challenges with changes in lifestyle and response to illness. Third, Spousal caregivers experience vigilance in an effort to ease the uncertainty of the recovery process. Fourth, knowledge helps spousal caregivers gain a sense control in the face of uncertainty. Fifth, mutuality within the partnership of nurse and the spousal caregiver relationship impacts the potential for transformation. Sixth, Spousal caregivers’ awareness of their life pattern gives meaning and offers the caregivers a new perception on life they have left to live. Findings from this study have important implications for nursing theory, practice, research, education and health care policy. The study adds empirical support to Newman’s Theory of Health as Expanding Consciousness and provides a new way to examine spousal caregiving and the nurse-client relationship. / Thesis (PhD) — Boston College, 2008. / Submitted to: Boston College. Connell School of Nursing. / Discipline: Nursing.

Li Baojiu = 宇宙学和新物理学的交叉领域 / 李宝九. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2006. / Includes bibliographical references (leaves 93-99). / Text in English; abstracts in English and Chinese. / Li Baojiu = Yu zhou xue he xin wu li xue de jiao cha ling yu / Li Baojiu. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Some Basic Conceptions in Cosmology --- p.2 / Chapter 1.1.1 --- "The Big Bang, Hubble's Law" --- p.2 / Chapter 1.1.2 --- The Cosmological Principle and Robertson-Walker Metric --- p.3 / Chapter 1.1.3 --- The Cosmological Redshift --- p.4 / Chapter 1.1.4 --- The Friedmann Equations --- p.4 / Chapter 1.2 --- Big Bang Nucleosynthesis --- p.5 / Chapter 1.3 --- Dark Energy --- p.9 / Chapter 2 --- "Branes, Varying Constants and BBN" --- p.16 / Chapter 2.1 --- A Brief Introduction to Theories Involving Extra Dimensions --- p.17 / Chapter 2.1.1 --- The Kaluza-Klein Theory --- p.18 / Chapter 2.1.2 --- Large Extra Dimensions --- p.19 / Chapter 2.1.3 --- Warped Extra Dimensions --- p.22 / Chapter 2.1.4 --- Universal Extra Dimensions --- p.24 / Chapter 2.1.5 --- Cosmology in a Brane World --- p.27 / Chapter 2.2 --- BBN and Varying Constants in Brane Models --- p.29 / Chapter 2.2.1 --- The Low Energy Effective Action in Brane Models --- p.30 / Chapter 2.2.2 --- BBN with a Varying Higgs VEV --- p.34 / Chapter 2.3 --- Numerical Results --- p.38 / Chapter 2.4 --- Discussion and Conclusions --- p.47 / Chapter 3 --- "Universal Extra Dimensions, Varying Constants and BBN" --- p.49 / Chapter 3.1 --- Introduction --- p.50 / Chapter 3.2 --- The Low Energy 4-Dimensional Effective Actions --- p.50 / Chapter 3.3 --- Radion Dependence of Fundamental Constants --- p.54 / Chapter 3.4 --- Variations of Quantities Relevant For BBN Calculation --- p.57 / Chapter 3.4.1 --- Neutron-proton Mass Difference --- p.57 / Chapter 3.4.2 --- Weak Interaction Rates --- p.58 / Chapter 3.4.3 --- Expansion Rate of the Universe --- p.58 / Chapter 3.4.4 --- Nuclear Reaction Rates --- p.59 / Chapter 3.5 --- Numerical Results --- p.64 / Chapter 3.6 --- Discussion and Conclusions --- p.70 / Chapter 4 --- Dark Energy as a Signature of Extra Dimensions --- p.74 / Chapter 4.1 --- Introduction --- p.75 / Chapter 4.2 --- The Underlying Higher Dimensional Theory --- p.75 / Chapter 4.3 --- The Cosmic Evolution in Different Eras --- p.79 / Chapter 4.3.1 --- The Blazing Era --- p.79 / Chapter 4.3.2 --- The Radiation Dominated Era --- p.83 / Chapter 4.3.3 --- The Matter Dominated Era --- p.84 / Chapter 4.4 --- A Realistic Cosmology --- p.85 / Chapter 4.5 --- Discussions and Conclusions --- p.92 / Bibliography --- p.93

The environmental conditions in the center of the Milky Way galaxy (Central Molecular Zone; CMZ) are much more extreme than in the disk of the galaxy with molecular gas properties similar to those seen in galaxies at z~2. While the CMZ hosts several massive star clusters, the formation of stars from these dense molecular clouds and the feedback of these massive stars on the ISM is not well understood. I present in my thesis a case study of a few regions in the CMZ using VLA continuum and spectral line observations. I explore feedback eects of recent star formation (a young massive stellar cluster) on the surrounding ISM (molecular and ionized gas). Using the kinematic information of molecular and ionized gas, obtained dierent species of spectral lines, I will determine the line of sight geometry of the dierent gas components. I will then establish the relationship of these components to the larger structure of molecular gas in the CMZ.

The subject of this thesis is searching in unstructured peer-to-peer systems. Such systems have been used for a variety of different applications, including file-sharing, content distribution and video streaming. These applications have been very popular; they contribute to a large percentage of today's Internet traffic and their users typically number in the millions. By searching, we refer to the process of locating content stored by peers. Searching in unstructured peer-to-peer systems poses a challenge because of high churn: both the topology and the content stored by peers can change quickly as peers arrive and depart, while the network formed under this churn process can be arbitrary at any point in time. As a result, a search mechanism must operate without any a priori assumptions on this dynamic topology. Ideally, a search mechanism should be scalable: as, typically, peers have limited bandwidth, the traffic generated by queries should not grow significantly as the peer population increases. Moreover, a search mechanism should also be reliable: if certain content is in the system, searching should locate it with reasonable guarantees. These two goals can be conflicting, as generating more queries increases a mechanism's reliability but decreases its scalability. Hence, a fundamental question regarding searching in unstructured systems is whether a mechanism can exhibit both properties, despite the network's dynamic and arbitrary nature. In this thesis, we show this is indeed the case, by proposing a novel mechanism that is both scalable and reliable. This is shown under a mathematical model that captures the evolution of both network and content in an unstructured system, but is also verified through simulations. To the best of our knowledge, this is the first provably scalable and reliable search mechanism for unstructured peer-to-peer systems. In addition to the above problem, we also consider a hybrid peer-to-peer system, in which the peer-to-peer network co-exists with a central server. The purpose of this hybrid architecture is to reduce the server's traffic by delegating part of it to its clients ---\emph{i.e.}, the peers: a peer wishing to retrieve certain content first propagates a query over the peer-to-peer network, and downloads the content from the server only if the query fails. This hybrid architecture can be used to partially decentralize a content distribution server, a search engine, an online encyclopedia, etc. The trade-off between scalability and reliability translates, in the hybrid case, to a trade-off between the peer and the server traffic loads. We propose a search mechanism under which both loads remain bounded as the peer population grows. This is surprising, and has an important implication: one can construct hybrid peer-to-peer systems that can handle traffic generated by a large (unbounded) peer population, even when both the server and peer bandwidth capacities are limited. Again, this is proved under a model capturing the hybrid system's dynamic nature and verified through simulations. To the best of our knowledge, our work is the first to show that hybrid systems with such properties exist.

The subject of this thesis is searching in unstructured peer-to-peer systems. Such systems have been used for a variety of different applications, including file-sharing, content distribution and video streaming. These applications have been very popular; they contribute to a large percentage of today's Internet traffic and their users typically number in the millions. By searching, we refer to the process of locating content stored by peers. Searching in unstructured peer-to-peer systems poses a challenge because of high churn: both the topology and the content stored by peers can change quickly as peers arrive and depart, while the network formed under this churn process can be arbitrary at any point in time. As a result, a search mechanism must operate without any a priori assumptions on this dynamic topology. Ideally, a search mechanism should be scalable: as, typically, peers have limited bandwidth, the traffic generated by queries should not grow significantly as the peer population increases. Moreover, a search mechanism should also be reliable: if certain content is in the system, searching should locate it with reasonable guarantees. These two goals can be conflicting, as generating more queries increases a mechanism's reliability but decreases its scalability. Hence, a fundamental question regarding searching in unstructured systems is whether a mechanism can exhibit both properties, despite the network's dynamic and arbitrary nature. In this thesis, we show this is indeed the case, by proposing a novel mechanism that is both scalable and reliable. This is shown under a mathematical model that captures the evolution of both network and content in an unstructured system, but is also verified through simulations. To the best of our knowledge, this is the first provably scalable and reliable search mechanism for unstructured peer-to-peer systems. In addition to the above problem, we also consider a hybrid peer-to-peer system, in which the peer-to-peer network co-exists with a central server. The purpose of this hybrid architecture is to reduce the server's traffic by delegating part of it to its clients ---\emph{i.e.}, the peers: a peer wishing to retrieve certain content first propagates a query over the peer-to-peer network, and downloads the content from the server only if the query fails. This hybrid architecture can be used to partially decentralize a content distribution server, a search engine, an online encyclopedia, etc. The trade-off between scalability and reliability translates, in the hybrid case, to a trade-off between the peer and the server traffic loads. We propose a search mechanism under which both loads remain bounded as the peer population grows. This is surprising, and has an important implication: one can construct hybrid peer-to-peer systems that can handle traffic generated by a large (unbounded) peer population, even when both the server and peer bandwidth capacities are limited. Again, this is proved under a model capturing the hybrid system's dynamic nature and verified through simulations. To the best of our knowledge, our work is the first to show that hybrid systems with such properties exist.

The unbalance of Taiwan employment environment and the economic recession have caused the unemployment rate to rise steadily. In order to resolve this situation, Council of Labor Affairs proposes several schemes and plans. One of the plans is the ¡§Plan of Expanding Employment¡¨. This plan encourages the third system to create more regional working opportunities with creative experimental methods, will of cooperation and combine government and public resources to re-involve the unemployed back to the labor structure. Due to the high unemployment rate in the southern region of Taiwan, the research in this book will study the participation of non-profit organizations in this ¡§Plan of Expanding Employment¡¨. The interviews and surveys will be undertaken in this study to analyze the role and operation in this plan through the view of ¡§social capital¡¨. The followings are the brief findings of this study. First of all, the non-profit organizations should upgrade professional management and service regularly. Meanwhile, they need to cooperate with similar organizations in terms of strategy alliance and information sharing. Secondly, in theory, it is necessary to keep the ¡§Social Plan¡¨ because to protect and secure the minority in the society. However, it needs to be improved technically which means that the non-profit organizations should conduct the plan to provide voluntary working opportunities in the society to extend ¡§Plan of Expanding Employment¡¨. Thirdly, the planning of the policy should have tangible progress and amendment to reflect the demand and supply in the employment environment. Finally, this research is studied in the view of ¡§social capital¡¨ to analyze the interaction between the plan and the employment environment and the direction of the plan. As the result, this research will provide another direction and thought to the observation of employment policy and become a reference to other associated researches.

Multicasting in mobile ad hoc networks (MANETs) is an efficient method for group communications that has received considerable attention. However, developing a scalable, robust and efficient multicast method in MANETs is difficult owing to group membership management and the ability to maintain a multicast structure over a dynamic topology. This work presents a novel Robust Mesh-based Multicast Protocol (RMMP) that integrates the advantages of tree-based and mesh-based multicast protocols and reduces data recovery time when paths break. The proposed RMMP is performed in two ways. One is to construct a multicast structure using a binary tree, and the other is to provide a second-route discovery scheme. The former distributes transmission averagely among member nodes, and the latter reduces the number of articulation nodes to eliminate loss of data packets. Simulation results demonstrate that the RMMP is suitable for heavy traffic loads, and achieves a high delivery ratio. Furthermore, the RMMP is robust in recovering data transmission when paths break.

Thesis advisor: Jane . Flanagan / Purpose: The purpose of this hermeneutic, dialectic, phenomenological qualitative study was to describe among a sample of recently retired (within the past five years) United States military veterans, the experience of the transition to retirement at midlife from active duty (AD.) The secondary aim is to describe within this sample of recently retired military veteran’s, the meaning of health to their post military lifestyle. Background: The transition to retirement from AD military service to retirement is a unique transition occurring at midlife about which little is known. Veterans serving after 9/11/2001 are more likely to have deployed and to have deployed multiple times compared to other service eras, having unique effects on relationships, physical and mental health, and meaning of health. No research has been done to examine the experience and meaning of health of career AD veterans who served during eighteen years of continuous war. Method: This study was guided by Margaret Newman’s Health as Expanding Consciousness (HEC) to explore the meaning of the transition to retirement and health among AD military veterans at midlife. Newman’s HEC guided data collection and analysis. Fourteen participants were recruited through purposive, criterion snowball sampling. Participants were individually interviewed about meaningful people and events in the military retirement and meaning of health. Rigor and trustworthiness were ensured by taking measures to support credibility, confirmability, dependability, and transferability. The researcher developed a narrative and diagram of meaningful events and relationships which was shared with each participant and reflected together on life patterning. Results: Fourteen participants consisting of men (n=10) and women (n=4) representing all branches of the military as well as officer and enlisted ranks participated in this study. The difficulty of finding a sense of purpose in retirement was common among participants. Participants also described becoming aware of health conditions after distrust of the healthcare system during their military careers. The experience of war was found to have effects on the entire family. Conclusion: Through HEC, a more complete understanding of the meaning of health and transition to retirement among active duty veterans was formed. Future research should focus on the unique populations of veterans including of combat veteran and women veterans. / Thesis (PhD) — Boston College, 2019. / Submitted to: Boston College. Connell School of Nursing. / Discipline: Nursing.

The thesis solves the design of tools for pressing round eyelet 10 mm diameter from steel sheet of DX51 0,5 mm thick. The ring is produced on the press LENA 25 C. Based on a literary study of shearing, expanding and neck drawing, a tool was developed that combines the hole punching of the sail and expanding of the ring end. The study of the circle edge appearance on SSM 3-E stereo microscope and the measurement of wall thickness using the ATOS Core 80 was performed. A simulation of the strain on the press was performed. The proposed tool was experimentally verified as working.

The Nemesis tracked vehicle platform is a differentially driven Humanitarian Demining tractor developed by Applied Research Associates, Inc. The vehicle is capable of teleoperational control and is outfitted with a sensor suite used for detecting and neutralizing landmines. Because the detection process requires the vehicle to travel at speeds less than 0.5 km/h, teleoperation is a tedious process. The added autonomous capabilities of waypoint navigation and obstacle avoidance could greatly reduce operator fatigue. ARA chose to leverage Virginia Tech's experience in developing an autonomous mobility capability for the Nemesis platform. The resulting algorithms utilize the waypoint navigation techniques of Virginia Tech's JAUS (Joint Architecture for Unmanned Systems) toolkit, and a modified version of the Dynamic Expanding Zones (DEZ) algorithm developed for the 2005 DARPA Grand Challenge. The modified approach discretizes the perception zones of the DEZ algorithm and provides the added capability of obstacle memory, resulting in the Discretized Dynamic Expanding Zones with Memory (DDEZm) algorithm. These additions are necessary for efficient autonomous control of the differentially driven Nemesis vehicle. The DDEZm algorithm was coded in LabVIEW and used to autonomously navigate the Nemesis vehicle through a waypoint course while avoiding obstacles. The Joint Architecture for Unmanned Systems (JAUS) was used as the communication standard to facilitate the interoperability between the software developed at Virginia Tech and the existing Nemesis software developed by ARA. In addition to development and deployment, the algorithm has been fully documented for embedded coding by a software engineer. With embedded implementation on the vehicle, this algorithm will help to increase the efficiency of the landmine detection process, ultimately saving lives. / Master of Science