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Exploring Transition Factors Among Female Veterans of Operation Enduring Freedom/Operation Iraqi Freedom (OIF/OEF)Robinson, Myra 01 January 2016 (has links)
Many transitional challenges have affected female veterans after returning from serving in the war in Iraq and Afghanistan. The number of females joining the military and becoming involved in combat has increased within the past 10 years. Research exists on the transitional challenges of male veterans. However, little research exists on the reintegration challenges faced by female veterans. As these females become veterans, they are more visible in the Veterans Affairs Health Care System. Given this increase in number of female veterans, it is important to address transitional challenges experienced by females who served in Operations Enduring Freedom and Operation Iraqi Freedom (OIF/OEF) postdeployment. For female veterans, the transitional experience will impact their responses to readjustment in civilian life. Selder's transitional theory and Schlossberg theory provided the framework for this phenomenological study. Using snowball sampling, 5 female veterans who served in combat during the past 5 years were selected and interviewed about their lived experiences using an open-ended interview guide. Data from the interview responses were inductively analyzed for themes and patterns. Using NVivo11 for management of data analysis, the interview responses were transcribed, categorized, coded, and clustered, revealing 5 themes: reflection on deployment, health issues, support from family, environmental concerns, and readjustment into roles. The key findings revealed that female veterans who served in combat experienced complex challenges after reintegrating back into civilian life. The findings may contribute to positive social change by informing treatment plans and support programs for female veterans reintegrating back into civilian life.
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Evolutionary theory: a 'good' explanatory framework for research into technological innovationMyers, Stephen Keir Unknown Date (has links)
This study attempts to answer the question; does evolutionary theory provide a ‘good’ explanatory framework for examining the phenomenon of technological innovation? In doing so, the study critically examines mainstream marketing’s in-place explanatory frameworks, offers an explanation of ‘evolution’ based on new insights from a broad range of (sub)disciplines, and makes the practical proposition that this explanation is a ‘good’ analogous representation of the technological innovation process. As an alternative to the ‘scientific empiricist’ approach that dominates much of marketing’s research into technological innovation, the study develops a research methodology that is based within a postmodern philosophy, adopts an epistemology of transcendental realism, bases the research design on abduction and textual explanation, and brings together a research method based on the criteria of interesting, plausibility and acceptability. Familiarisation with mainstream marketing’s explanatory frameworks for research into technological innovation identified Diffusion theory, New Product Development theory and Network theory as dominant. It is concluded that these frameworks are based on problematic theoretical foundations, a situation considered as largely due to a pre-occupation with assumptions that are atomistic, reductionistic, deterministic, gradualistic and mechanistic in nature. It is argued, that in concert with the ‘socialised’ dominance of mathematical form over conceptual substance, mainstream marketing’s research into technological innovation is locked into a narrow range of ‘preordained axiomatics’. The explanation of ‘evolution’ offered within the study is based on a why, what, how, when and where format. The resultant explanation represents a significant departure from the (neo)Darwinian biological perspective that tends to dominate evolutionary explanations of socio-economic behaviour, in that the focus is on the principles (and associated conceptualizations) of ‘variation’, ‘selection’ and ‘preservation’ within the broader context of open and dissipative systems. The offered explanation presents a number of theoretical ideas, and in particular, that evolution can only occur in a ‘multidimensional space of possibilities’, denotes a process of ‘adaptive emergence’, and is essentially concerned with ‘on-going resilience through adaptability’. The practical proposition is made that the offered explanation of ‘evolution’ can be used in an ‘as if’ manner, that is, the principles of ‘variation’, ‘selection’, and ‘preservation’ (and the meanings ascribed to them through conceptualization) are analogically transferable to the technological innovation research area. The proposition is supported through reference to theoretical and empirical research, highlighting the similarity with respect to the generative mechanisms, structures and contingent conditions underpinning both ‘evolution’ and ‘technological innovation’.
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Quantitative genetic models for genomic imprintingSanture, Anna Wensley, n/a January 2006 (has links)
A gene is imprinted when its expression is dependent on the sex of the parent from which it was inherited. An increasing number of studies are suggesting that imprinted genes have a major influence on medically, agriculturally and evolutionarily important traits, such as disease severity and livestock production traits. While some genes have a large effect on the traits of an individual, quantitative characters such as height are influenced by many genes and by the environment, including maternal effects. The interaction between these genes and the environment produces variation in the characteristics of individuals. Many quantitative characters are likely to be influenced by a small number of imprinted genes, but at present there is no general theoretical model of the quantitative genetics of imprinting incorporating multiple loci, environmental effects and maternal effects. This research develops models for the quantitative genetics of imprinting incorporating these effects, including deriving expressions for genetic variation and resemblances between relatives. Imprinting introduces both parent-of-origin and generation dependent differences in the derivation of standard quantitative genetic models that are generally equivalent under Mendelian expression. Further, factors such as epistasis, maternal effects and interactions between genotype and environment may mask the effect of imprinting in a quantitative trait. Maternal effects may also mimic a number of signatures in variance and covariance components that are expected in a population with genomic imprinting. This research allows a more comprehensive understanding of the processes influencing an individual�s characteristics.
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Development and Validation of the Control in Relationships ScaleNaydenova, Ivelina N. 01 August 2007 (has links)
Psychological research suggests that, other things being equal, the desire for or exercise of control over consequences is advantageous to the individual. However, in the context of relationships where the needs and welfare of another person are salient, the preference and enactment of control may be more problematic. Furthermore, although considerable research attention has been devoted to issues of control in general, the more contextualized, relationship-specific conceptualization of control has remained relatively unexplored in the literature, and the relevant research that does exist is limited by measurement problems. The primary purpose of this project was to advance the study of control in relationships through the development and validation of a self-report instrument specifically designed to measure it. An initial pool of 82 items was written and subsequently refined using both Likert analysis and factor analysis in a study involving college student dating relationship participants (n = 240). The subsequent version of the Control in Relationships (CIR) measure consisted of 26 items, which showed good internal consistency and reliability over time. Furthermore, the factor structure of the 26 items was interpretable and suggested a coherent underlying structure of the CIR construct. Subsequently, the validity of the measure was assessed, indicating that CIR was significantly related to pertinent measures of control, and three separate measures of relationship satisfaction, as well as measures of partner trust and risk of intimacy. The validation portion of this study suggested the negative characteristics of the CIR construct that might be detrimental not only to the individual, but also to the relationship. Results supported the utility of CIR as a measure of control in relationships and also suggested several directions for future research.
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Evaluation of mares as a source of Rhodococcus equi for their foals using quantitative culture and a colony immunoblot assayGrimm, Michael Bradley 02 June 2009 (has links)
Fecal specimens from 130 different mares were collected from an endemic farm for 2 consecutive years at 4 different times pre- and post-foaling (41 mares contributed data in both years). A modified NANAT agar medium was used to quantitatively culture 1-g aliquots of the mare feces without inhibition of growth of Rhodococcus equi. Once the R. equi in the mare feces were quantified and the total concentrations of R. equi determined, a colony immunoblot procedure was performed to detect the presence of the virulence-associated protein antigen on the isolates. This allowed for the proportion and concentration of virulent R. equi to be determined. Foals that were found to have ultrasonographic evidence of peripheral pulmonary abscessation or consolidation underwent aseptic trans-cutaneous tracheobronchial aspiration. Positive results of TBA were used to categorize foals as affected with R. equi pneumonia. R. equi pneumonia developed in 31% of the foals. Shedding of virulent R. equi was observed in at least 1 sampling period for every mare examined, and >33% were culture-positive during all sampling periods. However, significant differences were not observed in either the fecal concentrations of total or virulent R. equi from dams of affected foals compared to dams of unaffected foals. No significant temporal changes in the fecal concentrations of R. equi were observed. It was concluded that dams of affected foals do not shed more R. equi in feces than do dams of unaffected foals, indicating that heavier shedding by particular mares does not explain infection in their foals. However, the finding that virulent R. equi were excreted in the feces of all sampled mares indicates that mares are likely an important source of R. equi for their surrounding environment.
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Pricing derivatives using Gram-Charlier ExpansionsCheng, Yin-Hei 09 April 2013 (has links)
In this thesis, we provide several applications of Gram-Charlier expansions in derivative
pricing. We first give an exposition on how to calculate swaption prices under the
the CIR2 model. Then we extend this method to CIR2++ model. We also develop a
procedure to calculate European call options under Heston’s model of stochastic volatility
by Gram-Charlier Expansions.
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Sovereign Credit Risk Analysis for Selected Asian and European CountriesZhang, Min January 2013 (has links)
We analyze the nature of sovereign credit risk for selected Asian and European countries through a set of sovereign CDS data for an eighty-year period that includes the episode of the 2008-2009 financial crisis. Our principal component analysis results suggest that there is strong commonality in sovereign credit risk across countries after the crisis. The regression tests show that the commonality is linked to both local and global financial and economic variables. Besides, we also notice intriguing differences in the sovereign credit risk behavior of Asian and European countries. Specifically, we find that some variables, including foreign reserve, global stock market, and volatility risk premium, affect the of Asian and European sovereign credit risks in the opposite direction. Further, we assume that the arrival rates of credit events follow a square-root diffusion from which we build our pricing model. The resulting model is used to decompose credit spreads into risk premium and credit-event components.
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High resolution microendoscopy for quantitative diagnosis of esophageal neoplasiaShin, Dong Suk 16 September 2013 (has links)
Esophageal cancer is the eighth most common cancer in the world. Cancers of the esophagus account for 3.8% of all cases of cancers, with approximately 482,300 new cases reported in 2008 worldwide. In the United States alone, it is estimated that approximately 18,000 new cases will be diagnosed in 2013, and 15,210 deaths are expected. Despite advances in surgery and chemoradiation therapy, these advances have not led to a significant increase in survival rates, primarily because diagnosis often at an advanced and incurable stage when treatment is more difficult and less successful. Accurate, objective methods for early detection of esophageal neoplasia are needed.
Here, quantitative classification algorithms for high resolution miscroendoscopic images were developed to distinguish between esophageal neoplastic and non-neoplastic tissue. A clinical study in 177 patients with esophageal squamous cell carcinoma (ESCC) was performed to evaluate the diagnostic performance of the classification algorithm in collaboration with the Mount Sinai Medical Center in the United States, the First Hospital of Jilin University in China, and the Cancer Institute and Hospital, the Chinese Academy of Medical Science in China. The study reported a sensitivity and specificity of 93% and 92%, respectively, in the training set, 87% and 97%, respectively, in the test set, and 84% and 95%, respectively, in an independent validation set. Another clinical study in 31 patients with Barrett’s esophagus resulted in a sensitivity of 84% and a specificity of 85%. Finally, a compact, portable version of the high resolution microendoscopy (HRME) device using a consumer-grade camera was developed and a series of biomedical experimental studies were carried out to assess the capability of the device.
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Quantitative genetics of growth, carcass-quality traits, and disease resistance in hybrid striped bass (Morone chrysops [female] x Morone saxatilis [male])Wang, Xiaoxue 15 May 2009 (has links)
A 10 x 10 factorial mating design and a ‘common-garden’ rearing approach were
employed to examine genetic effects and heritability of growth, carcass-quality traits,
and disease resistance, important production traits in the aquaculture of hybrid striped
bass (♀ white bass, Morone chrysops, crossed with ♂striped bass, Morone saxatilis).
Genotypes at four to ten nuclear-encoded microsatellites were used for parentage
assignment and a general, linear-mixed model and a Restricted Maximum Likelihood
(REML) algorithm were used to estimate variance components associated with dam, sire,
and dam x sire interaction effects.
Dam and sire effect on juvenile growth (weight, length and growth rates) were
significant, whereas dam by sire interaction effect was not. Estimates of broad-sense
heritability for growth, based on family means (h2
f), in dams ranged from 0.60 ± 0.20 to
0.82 ± 0.10 and in sires ranged from 0.43 ± 0.20 to 0.75 ± 0.18. High correlations were
found between growth rates measured at two time intervals. Estimates of general
combining ability for growth rates differed significantly among dams and among sires,
whereas estimates of specific combining ability for each dam × sire combination did not differ significantly from zero. These results suggest that additive-effect genes
contributed to the differences in juvenile growth.
Dam and sire effect on fillet weight were significant; dam effect on liver weight
and sire effect on total viscera weight were also significant. Dam and sire effect on
hepatosomatic index and viscerasomatic index were significant, as was dam and sire
interaction effect on viscerasomatic index. Phenotypic and genetics correlations between
body weight and carcass-quality traits were high (0.85 - 1.00). Phenotypic correlations
between body weight and standardized carcass-quality traits were positive but low,
ranging from 0.07 to 0.19.
Resistance to S. iniae was assessed in a challenge experiment, using the 10 dam x
10 sire factorial mating design. A significant effect of sire on resistance to S. iniae was
found, and offspring from one sire had a 2.4 times higher probability of dying than
offspring from the ‘average’ sire. Genetic effects on the immune-response parameters
and on stress-response parameters assessed were non-significant.
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Evaluation of mares as a source of Rhodococcus equi for their foals using quantitative culture and a colony immunoblot assayGrimm, Michael Bradley 02 June 2009 (has links)
Fecal specimens from 130 different mares were collected from an endemic farm for 2 consecutive years at 4 different times pre- and post-foaling (41 mares contributed data in both years). A modified NANAT agar medium was used to quantitatively culture 1-g aliquots of the mare feces without inhibition of growth of Rhodococcus equi. Once the R. equi in the mare feces were quantified and the total concentrations of R. equi determined, a colony immunoblot procedure was performed to detect the presence of the virulence-associated protein antigen on the isolates. This allowed for the proportion and concentration of virulent R. equi to be determined. Foals that were found to have ultrasonographic evidence of peripheral pulmonary abscessation or consolidation underwent aseptic trans-cutaneous tracheobronchial aspiration. Positive results of TBA were used to categorize foals as affected with R. equi pneumonia. R. equi pneumonia developed in 31% of the foals. Shedding of virulent R. equi was observed in at least 1 sampling period for every mare examined, and >33% were culture-positive during all sampling periods. However, significant differences were not observed in either the fecal concentrations of total or virulent R. equi from dams of affected foals compared to dams of unaffected foals. No significant temporal changes in the fecal concentrations of R. equi were observed. It was concluded that dams of affected foals do not shed more R. equi in feces than do dams of unaffected foals, indicating that heavier shedding by particular mares does not explain infection in their foals. However, the finding that virulent R. equi were excreted in the feces of all sampled mares indicates that mares are likely an important source of R. equi for their surrounding environment.
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