Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 208-221). Available also in a digital version from Dissertation Abstracts.

Thesis (M.S.)--Brigham Young University. Dept. of Civil and Environmental Engineering, 2008. / Includes bibliographical references (p. 121-125).

Thesis, PlanB (M.S.)--University of Wisconsin--Stout, 2005. / Includes bibliographical references.

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Thesis (M.A. in Security Studies (Homeland Security and Defense))--Naval Postgraduate School, March 2006. / Thesis Advisor(s): Christopher Bellavita. "March 2006." Includes bibliographical references (p. 77-80). Also available online.

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2 pp. / Cutting boards come in all shapes, sizes, colors, and are comprised of various materials such as wood, bamboo, acrylic, plastic, glass, marble, and pyroceramic. There are various steps one can take to ensure proper cutting board sanitation and food safety.

In radiological protection, models are used to assess radiation risk by means of extrapolation from high dose and dose rate to low dose and dose rate. In this thesis five main biophysical models of radiation action have been evaluated, appraised and inter-compared. The five models are lethal and potentially lethal (LPL) by Curtis, pairwise lesion interaction (PLI) by Harder, cellular track structure (CTS) by Katz, hit size effectiveness (HSE) by Bond and Varma and track core (TC) by Watt. Each model has been developed based on certain underlying mechanisms or phenomena, to permit interpretation and prediction on the induction of a specified biological endpoint such as cell reproductive death, chromosome aberrations and mutations. Biological systems of interest are, for example, mammalian cells containing deoxyribonucleic acid (DNA). Evidence is mounting that double strand breaks in the DNA are the critical lesions for various biological end points. To proceed with this work the TC model has been chosen. Cancer induction by ionising radiation is the stochastic effect of prime concern in radiological protection. Cancer induction cannot be avoided entirely but its frequency of occurrence may be reduced to acceptable level by lowering the amount of radiation received. The methods of assessment developed by ICRP, in terms of the cancer risk coefficients, are presented in this thesis. In the conventional (legal) system of dosimetry, radiation is quantified by the amount of energy absorbed per unit mass of tissue. Quality factors, superseded by radiation weighting factors, are needed to account for the quality dependence on radiation type. As an alternative, a new dosimetry system is proposed here which is based on the mean free path for primary ionisation along particle tracks and the integral fluence generated by the radiation field, whether directly or indirectly ionising radiation. From the study of cellular data, the mean free path for primary ionisation along particle tracks (lambda) emerges as a parameter which best unifies biological damage data. Radiation effect is found to depend, not on the energy transferred but to depend mainly on the frequency and spatial correlation of interactions. Maximum effect occurs when lambda is equal to lambda0 (2 nanometre, nm). The term 'Absolute Biological Effectiveness' (ABE) is introduced as a parameter which indicates the probability to induce a specified effect, per unit incident fluence. In this endeavour, only direct effects are considered in deriving ABE values for various radiations. However other factors such as indirect effects, inter-track action, repair processes and radiation rate, can be incorporated later if required, in the derivation of ABE. ABE values for photons up to 60Co i.e 1253 keV and neutrons up to 105 keV, have been calculated and presented in this thesis. An attempt has been made to re-express the cancer risk coefficients, derived by ICRP, in the new dosimetry system, in terms of the ABE (Absolute Biological Effectiveness). The hypothesis put forward in this thesis is that the induction of a specified biological-end-point in a biological system due to ionising radiations, is determined not by the amount of energy absorbed per unit mass (dose), but rather by the number of events (ionizations) spatially correlated, along the primary radiation track. Based on this hypothesis, a new unified dosimetry system, independent of radiation type, is proposed. Suggestions are made for possible measuring instruments which have the equivalent response characteristics, namely maximum efficiency of detection for the mean free path Success in devising such types of instrument would ensure the practicability of the new dosimetry system, in operational radiological protection.

Public service announcements (PSA) have been utilized successfully to promote the health behaviors to the public. In spite that Hong Kong government keep increasing the budget of PSA (admanGo, 2015;2016), the effectiveness of PSA is seldom measured. Previous studies focus on testing the discourses, contents, and public's interpretations of PSA (Chan and Huang, 2015; Chan & Chang, 2013; Wong, 2006). Little research tries to explore the design and effectiveness of PSA. Besides, Hong Kong is facing a serious road safety issue due to the rapid development of the economy. And the convenient use of mobile phones causes the public pays less attention to road safety issue. According to the annual report of road safety council (2015), "inattentively" is the primary contributory factor in road accidents both from driver perspective and passenger perspective. A study was designed to investigate the public attitudes and behavior related to road safety and their responses to public service announcements using narrative or fear appeals. Two main theories were utilized to create the theoretical framework for this study: Regulatory fit theory and the Theory of planned behavior. The hedonic principle plays a role in the basic function of RFT and TPB. Both of them aim to change people's behavioral intentions and concerns that people approach pleasure and avoid pain. The core principle in RFT is to examine people's approach and avoidance mechanisms based on the two regulatory focus systems. On the other hand, TPB emphasizes that people's intentions are performed based on the chronic perceptions of the positive or negative outcomes of the recommended behaviors. Once people think the recommended behaviors are favorable, they are more likely to engage, which matches the principle of pleasant and pain from RFT. This study investigates the impact of either focusing on promotion or prevention in the Regulatory fit theory along with fear appeal, which could modify the variables in Theory of planned behavior, by taking road safety as a context. The purpose of this study is to explore whether Regulatory fit theory with fear framing will have merit under several conditions that may influence individuals' emotional responses, behavioral intentions, and information processing. Survey methodology was adopted. A model incorporating variables in RFT and TPB was proposed. A structured questionnaire was designed to include the key constructs in the RFT and TPB. Altogether 523 responses were collected from 30 November 2017 to 24 December 2017, including 106 respondents from the questionnaire in paper form and 481 from the online platform, in Hong Kong and Mainland China. Four types of stimuli were designed to examine the model. Empirical data of this study confirms the high influence of predictors including attitude towards behavior, perceived behavioral control, and subjective norms to predict behavior intention. In particular, subjective norms are the highest-level predictor. About the self-regulatory fit, promotion focus predicts more than prevention focus on health communication. What's more, the results showed that perceived relevance is a key factor when people make decisions about a health-related behavior. This study theoretically attempts to extend Regulatory fit theory by adding fear as the emotional variable that tests whether fear is fit/unfit for an individual's regulatory focus, especially in the behavioral health context, which can help practitioners better understand the use of fear appeal along with Regulatory fit theory and how it impacts individuals' health behaviors. Practically, this study explores the theory-driven communication strategy for practitioners. Fear appeal is one of the most common tactics in health communication campaigns, but there is a lack of research to compare the practical impact of fear appeal. For instance, most practitioners prefer to adopt fear appeal rather than emotional appeals or narrative appeals in health promotions, but few empirical studies have verified the benefits of fear appeal from a theory-based perspective. Furthermore, this study seeks to answer some questions in daily health communication in daily life by applying the Regulatory fit theory, such as how different focus-oriented people understand the fear appeals in health messages. The findings of this study will explore some effective message strategies for health communications and marketing practitioners.

<p> The purpose of this study was to explore and understand the successful prevention and mitigation of workplace violence (WPV) against nurses in the Emergency Department (ED), and to learn what multidisciplinary hospital leaders are doing to accelerate progress. Specifically, the research considers the strategies, policies and actions hospital leaders are using to prevent and mitigate WPV; the positive progress or outcomes that have been realized thus far; what these leaders have learned in the process, and what they aspire to achieve in the future. In the process of exploring why and how positive progress accelerated, it was found that hospital leaders experienced positive progress in WPV prevention and mitigation when their hospitals provided a WPV program utilizing these exemplary strategies: (a) collaborative multidisciplinary partnerships, (b) fully engaged executive support, and (c) operationalized data. It was interesting to note that as multidisciplinary partners and fully engaged executives collaborated, and supported their teams in the process of establishing these WPV initiatives, a culture of respect was catalyzed and WPV initiatives gained momentum. The details of this research highlight that operationalized data&mdash;WPV data put to use in a centralized, customized, evidence-based approach&mdash;appears to have functioned as a key accelerant of positive progress in WPV prevention and mitigation for these hospital leaders. </p><p>