582 research outputs found

    Obstacles to Economic Growth and Business Attraction in Georgia

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    The problem addressed in the study was that Georgia\u27s economic development leadership faced obstacles that challenged the state\u27s growth in attracting new business and developing existing business. The purpose of this case study was to explore the obstacles encountered by a specific agency to attract businesses to generate economic growth. Accessing obstacles that hinder leaders to promote the state of Georgia growth is pertinent, including exploring where the system may be constrained. The theory of constraints guided this study to investigate what obstacles state leaders face in economic development. An embedded case study was conducted using purposeful sampling to select 11 participants for interviews, including managers, directors, and a deputy commissioner from a state agency in Atlanta with significant experience in attracting and maintaining businesses for growth. Inductive coding using Attride-Stirling, Braun and Clark\u27s 6-step approach resulted in 4 themes. Themes that emerged as findings were: low quality education, time delays deterred corporations to locate to Georgia, perception of limited public transportation and affiliated crime, and infrastructure and accessibility dilemmas. The implications for positive social change included needed improvements to education, elimination of traffic barriers, expansion of public transportation, and development of infrastructure to benefit and enhance a better life for Georgia residents

    Effect of β-hydroxybutyric acid, parity, and body condition score on phenotype and proliferative capacity of colostral mononuclear leukocytes of high-yielding dairy cows

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    In neonatal calves, the ingestion of colostrum is imperative for preventing infectious diseases. Investigations into the transfer of passive immunity of cattle have primarily focused on the importance of colostral immunoglobulins, with a recent increase in focus on understanding the role of colostral leukocytes. The main objective of the present study was to measure the influence of parity, body condition score, serum nonesterified fatty acids, and serum beta-hydroxybutyrate concentrations of periparturient cows on phenotype and mitogen-and antigen-induced proliferative capacity of bovine colostral leukocytes. Holstein-Friesian cows (n = 141) were intramuscularly vaccinated at 60 and 30 d before the expected parturition date with a tetanus toxoid vaccine. Of these 141 animals, 28 primiparous and 72 multiparous cows were sampled immediately. after parturition. Colostrum mononuclear cell populations were identified by flow cytometry using bovine cluster of differentiation markers, and the proliferative capacity of these cells was determined using a H-3-thymidine proliferation assay. Under-conditioned cows had a significantly higher percentage of colostral macrophages than normal-conditioned animals, whereas over-conditioned cows had significantly more colostral B-lymphocytes. Serum beta-hydroxybutyrate was significantly associated with higher numbers of colostral T-lymphocytes and macrophages. Heifers had significantly higher mitogen- and antigen-induced proliferation of their colostral leukocytes than third parity or older cows. In conclusion, body condition score, parity, and serum beta-hydroxybutyrate concentration of periparturient high-yielding dairy cows were shown to influence the number of colostral macrophages or the mitogen-and antigen-induced proliferation of colostral leukocytes, possibly influencing the cellular immunity of the newborn calf

    Psychological Needs Mediate the Relationship between Physical Exertion Barriers and Body Fat percent in College-Aged Mexican-American Women

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    In the last several decades, there has been a wave of interest in the overweight/obese population in the United States. However, little research has focused on the association between exercise barriers and psychological needs in college-aged Mexican-American females. PURPOSE: To investigate the relationships between exercise barriers, psychological needs for exercise, and obesity among college-aged Mexican-American females. METHODS: Body fat measures were recorded on 91 female students (M = 22.8±5.1). The Exercise Benefits and Barriers Scale (EBBS) was used to determine perceived barriers. The EBBS examined Exercise Milieu (EM), Time Expenditure (TEB), Physical Exertion (PEB), and Family Discouragement (FDB) for perceived barriers to exercise. The Psychological Need Satisfaction in Exercise Scale (PNSE) was used to examine the degrees of perceived Competence (PCo), Autonomy (PAu), and Relatedness (PR) as they pertain to an individual’s motivation to exercise. RESULTS: The mean body fat score indicated 28.6 % (n=26) of the sample were overweight, and 50.6 % (n=46) were obese. There were significant correlations observed between PCo (r=-.35, p=.00) and PAu (r=-.25, p=.02) with reduced BF %. PCo (r=-.22, p=.04) and PAu (r=-.23, p=.01) negatively associated with PEB. PEB (r=.24, p= .02) significantly correlated with increased BF %. Mediation analysis indicated that PCo and PAu influenced the relationship between PEB and BF % in college-aged Mexican-American females. CONCLUSION: The findings indicate that women who continue to perceive exercise as being strenuous lack intrinsic motivation which may lead to physical inactivity; thus unhealthy accumulation of BF is likely. In order to overcome such perceptions, practitioners should target the enhancement of psychological needs to reduce perceived barriers. Therefore, successful intervention programs need to focus on increasing competency and autonomy for exercise with the actual exercise program in Mexican-American women

    (In)Dependence, Socio-sexual Relationships, and Sexual Health Among Adults with Mild Intellectual Disability (MID): A Critical, Qualitative Exploration

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    The purpose of this critical, qualitative study was to explore how adults with mild intellectual disability navigate independent socio-sexual relationships in settings where they are highly dependent upon caregivers and family members who exert significant control over most aspects of their lives. Data were gathered during one-on-one interviews conducted with adults with MID (n=15), and parental caregivers (n=6). Theoretical insights from critical disability studies and sexual citizenship were used to analyze the findings, which are presented thematically by study population. Participants with MID faced challenges to establishing and maintaining meaningful relationships, including a lack of choice about where and how they interact with others, a lack of privacy for intimacy, and not being afforded adequate knowledge of healthy relationships and sexual health by their caregivers. These challenges were directly shaped by the perspectives of caregivers, who perceived their adult children with MID as being inherently vulnerable and in need of their intervention. Their intervention often took the form of paternalistic practices that curtailed the activities and aspirations related to day-to-day life activities, peer-relationships, and sexuality for the adults with MID. These study findings contribute fresh, compelling insights to this important research, especially in relation to the topics of assumed vulnerability, sexual boundaries, sexual violence, and reproduction among adults with MID. The potential impact of these data on disability policies and practices, particularly those that affect the social, spatial, and sexual health of adults with MID are discussed, and recommendations for policy and advocacy are offered

    Risk and safety perception on urban and rural roads: Effects of environmental features, driver age and risk sensitivity

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    Objective: The ability to detect changing visual information is a vital component of safe driving. In addition to detecting changing visual information, drivers must also interpret its relevance to safety. Environmental changes considered to have high safety relevance will likely demand greater attention and more timely responses than those considered to have lower safety relevance. The aim of this study was to explore factors that are likely to influence perceptions of risk and safety regarding changing visual information in the driving environment. Factors explored were the environment in which the change occurs (i.e., urban vs. rural), the type of object that changes, and the driver’s age, experience, and risk sensitivity. Methods: Sixty three licensed drivers aged 18–70 years completed a hazard rating task, which required them to rate the perceived hazardousness of changing specific elements within urban and rural driving environments. Three attributes of potential hazards were systematically manipulated: the environment (urban, rural); the type of object changed (road sign, car, motorcycle, pedestrian, traffic light, animal, tree); and its inherent safety risk (low risk, high risk). Inherent safety risk was manipulated by either varying the object’s placement, on/near or away from the road, or altering an infrastructure element that would require a change to driver behavior. Participants also completed two driving-related risk perception tasks, rating their relative crash risk and perceived risk of aberrant driving behaviors. Results: Driver age was not significantly associated with hazard ratings, but individual differences in perceived risk of aberrant driving behaviors predicted hazard ratings, suggesting that general driving-related risk sensitivity plays a strong role in safety perception. In both urban and rural scenes, there were significant associations between hazard ratings and inherent safety risk, with low-risk changes perceived as consistently less hazardous than high-risk impact changes; however, the effect was larger for urban environments. There were also effects of object type, with certain objects rated as consistently more safety relevant. In urban scenes, changes involving pedestrians were rated significantly more hazardous than all other objects, and in rural scenes, changes involving animals were rated as significantly more hazardous. Notably, hazard ratings were found to be higher in urban compared with rural driving environments, even when changes were matched between environments. Conclusion: This study demonstrates that drivers perceive rural roads as less risky than urban roads, even when similar scenarios occur in both environments. Age did not affect hazard ratings. Instead, the findings suggest that the assessment of risk posed by hazards is influenced more by individual differences in risk sensitivity. This highlights the need for driver education to account for appraisal of hazards’ risk and relevance, in addition to hazard detection, when considering factors that promote road safetyThis research was supported by a grant from the NRMA-ACT Road Safety Trust. Vanessa Beanland is supported by an Australian Research Council Discovery Early Career Researcher Award (DE150100083)

    Genetic and functional characterization of putative Ras/Raf interaction inhibitors in C. elegans and mammalian cells

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    Abstract Background Activation of the mammalian Ras-Raf-MEK-ERK MAPK signaling cascade promotes cellular proliferation, and activating Ras mutations are implicated in cancer onset and maintenance. This pathway, a therapeutic target of interest, is highly conserved and required for vulval development in C. elegans. Gain-of-function mutations in the Ras ortholog lead to constitutive pathway signaling and a multivulva (Muv) phenotype. MCP compounds were identified in a yeast two-hybrid screen for their ability to disrupt Ras-Raf interactions. However, this had not been confirmed in another system, and conflicting results were reported regarding selective MCP-mediated blockade of Ras- and Raf-mediated biological activities in mammalian cells. Here we used the easily-scored Muv phenotype as an in vivo readout to characterize the selectivity of MCP110 and its analogs, and performed biochemical studies in mammalian cells to determine whether MCP treatment results in impaired interaction between Ras and its effector Raf. Results Our genetic analyses showed significant dose-dependent MCP-mediated reduction of Muv in C. elegans strains with activating mutations in orthologs of Ras (LET-60) or Raf (LIN-45), but not MAP kinases or an Ets-like transcription factor. Thus, these inhibitors selectively impair pathway function downstream of Ras and upstream of or at the level of Raf, consistent with disruption of the Ras/Raf interaction. Our biochemical analyses of MCP110-mediated disruption of Ras-Raf interactions in mammalian cells showed that MCP110 dose-dependently reduced Raf-RBD pulldown of Ras, displaced a fluorescently-tagged Raf-RBD probe from plasma membrane locations of active Ras to the cytosol and other compartments, and decreased active, phosphorylated ERK1/2. Conclusions We have effectively utilized C. elegans as an in vivo genetic system to evaluate the activity and selectivity of inhibitors intended to target the Ras-Raf-MAPK pathway. We demonstrated the ability of MCP110 to disrupt, at the level of Ras/Raf, the Muv phenotype induced by chronic activation of this pathway in C. elegans. In mammalian cells, we not only demonstrated MCP-mediated blockade of the physical interaction between Ras and Raf, but also narrowed the site of interaction on Raf to the RBD, and showed consequent functional impairment of the Ras-Raf-MEK-ERK pathway in both in vivo and cell-based systems

    Coronary-artery bypass surgery in patients with ischemic cardiomyopathy

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    BACKGROUND The survival benefit of a strategy of coronary-artery bypass grafting (CABG) added to guideline-directed medical therapy, as compared with medical therapy alone, in patients with coronary artery disease, heart failure, and severe left ventricular systolic dysfunction remains unclear. METHODS From July 2002 to May 2007, a total of 1212 patients with an ejection fraction of 35% or less and coronary artery disease amenable to CABG were randomly assigned to undergo CABG plus medical therapy (CABG group, 610 patients) or medical therapy alone (medical-therapy group, 602 patients). The primary outcome was death from any cause. Major secondary outcomes included death from cardiovascular causes and death from any cause or hospitalization for cardiovascular causes. The median duration of follow-up, including the current extended-follow-up study, was 9.8 years. RESULTS A primary outcome event occurred in 359 patients (58.9%) in the CABG group and in 398 patients (66.1%) in the medical-therapy group (hazard ratio with CABG vs. medical therapy, 0.84; 95% confidence interval [CI], 0.73 to 0.97; P=0.02 by log-rank test). A total of 247 patients (40.5%) in the CABG group and 297 patients (49.3%) in the medical-therapy group died from cardiovascular causes (hazard ratio, 0.79; 95% CI, 0.66 to 0.93; P=0.006 by log-rank test). Death from any cause or hospitalization for cardiovascular causes occurred in 467 patients (76.6%) in the CABG group and in 524 patients (87.0%) in the medical-therapy group (hazard ratio, 0.72; 95% CI, 0.64 to 0.82; P<0.001 by log-rank test). CONCLUSIONS In a cohort of patients with ischemic cardiomyopathy, the rates of death from any cause, death from cardiovascular causes, and death from any cause or hospitalization for cardiovascular causes were significantly lower over 10 years among patients who underwent CABG in addition to receiving medical therapy than among those who received medical therapy alone. (Funded by the National Institutes of Health; STICH [and STICHES] ClinicalTrials.gov number, NCT00023595.

    The C. elegans Chp/Wrch Ortholog CHW-1 Contributes to LIN-18/Ryk and LIN-17/Frizzled Signaling in Cell Polarity

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    Wnt signaling controls various aspects of developmental and cell biology, as well as contributing to certain cancers. Expression of the human Rho family small GTPase Wrch/RhoU is regulated by Wnt signaling, and Wrch and its paralog Chp/RhoV are both implicated in oncogenic transformation and regulation of cytoskeletal dynamics. We performed developmental genetic analysis of the single Caenorhabditis elegans ortholog of Chp and Wrch, CHW-1. Using a transgenic assay of the distal tip cell migration, we found that wild-type CHW-1 is likely to be partially constitutively active and that we can alter ectopic CHW-1-dependent migration phenotypes with mutations predicted to increase or decrease intrinsic GTP hydrolysis rate. The vulval P7.p polarity decision balances multiple antagonistic Wnt signals, and also uses different types of Wnt signaling. Previously described cooperative Wnt receptors LIN-17/Frizzled and LIN-18/Ryk orient P7.p posteriorly, with LIN-17/Fz contributing approximately two-thirds of polarizing activity. CHW-1 deletion appears to equalize the contributions of these two receptors. We hypothesize that CHW-1 increases LIN-17/Fz activity at the expense of LIN-18/Ryk, thus making the contribution of these signals unequal. For P7.p to polarize correctly and form a proper vulva, LIN-17/Fz and LIN-18/Ryk antagonize other Wnt transmembrane systems VANG-1/VanGogh and CAM-1/Ror. Our genetic data suggest that LIN-17/Fz represses both VANG-1/VanGogh and CAM-1/Ror, while LIN-18/Ryk represses only VANG-1. These data expand our knowledge of a sophisticated signaling network to control P7.p polarity, and suggests that CHW-1 can alter ligand gradients or receptor priorities in the system
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