702 research outputs found

    Alien Registration- Doucette, Marie L. (Lewiston, Androscoggin County)

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    https://digitalmaine.com/alien_docs/29318/thumbnail.jp

    The effects of graphical fidelity on player experience

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    Graphical assets in video games have become increasingly complex over the years, but little is known about their effect on player experience (PX). In this paper, we present results of a controlled study with 48 participants comparing how abstract and stylized graphics influence player experience in casual games. Our results show that high-fidelity graphics result in a more positive impression of the game. However, we also show that many effects are only present in the game with a more challenging mechanic. This shows that casual games can be compelling and enjoyable to play despite simplistic graphics, suggesting that small game developers and researchers need not focus on elaborate visuals to engage players. Copyright © 2013 ACM

    US Ireland Partnership Program: BEACONS: Biosafety for Environmental Contaminants Using Novel Sensors

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    BEACONS is a unique collaboration between the United States, Northern Ireland and the Republic of Ireland, that aims to develop a novel sample preparation device coupled to a portable sensor which will be capable of rapidly analyzing for the presence of major aquatic toxins and associated organisms in water samples. It harnesses the substantial complementary expertise of the international partners and their institutions to address a problem that has world-wide implications for human health and aquatic related industries. The results will be used for the generation of a commercially applicable prototype device that could have the potential to be applied to a wide range of different analytical problems. The program will involve significant exchange of personnel and expertise and will generate novel scientific data and approaches linked with the solution of a key problem for all the partners\u27 jurisdictions. This project will develop a set of easily portable instruments that can be utilized for biotoxin and toxic organism detection, and be adapted subsequently for monitoring of other potentially harmful organisms and their toxins. A key element for any field deployable sensing instrument is the acquisition and preparation of samples. Thus, the proposed research includes development of a sample preparation platform and associated protocols for concentration and delivery of targeted toxin and nucleic acid sequences to a hand-held detection device. The expected outcome is the development of a sample preparation module and assay methods for an optical detection device, based on planar waveguide technology, capable of measuring in real time the presence of both toxin producing organisms and the toxins themselves in coastal and fresh water samples. The sample preparation module will involve the integration of novel microfluidics with peptide nucleic acids (PNAs) and engineered broad affinity, highly stable capture antibodies. Resultant extracts will be introduced into the detection system, which will employ an array-based, planar waveguide technology previously incorporated into a hand-held device by a commercial partner and made available to project collaborators for development of assays for toxins and organisms. They will utilize highly specific, engineered antibodies for capturing toxin molecules and PNAs as capture probes to detect the corresponding toxigenic organisms. This technology is expected to provide new and improved means of assessing the potential risks associated with contamination of coastal and fresh water fishery resources by algal biotoxins. The US-Ireland Partnership Program has been endorsed at the highest political levels by the three jurisdictions (U.S., Republic of Ireland, and Northern Ireland). The added value for the U.S. from the BEACONS proposal includes a combination of significant intellectual and financial contributions from Ireland. Moreover, the project will involve a well coordinated exchange of researchers between the participating organizations. In particular, the opportunities of exchange visits for young scientists employed on the project will be important from both scientific and cultural perspectives. A critical element of detecting any analyte is sample processing. Therefore, in addition to stronger international collaborations and training of young scientists, this project aims to provide a new portable and flexible platform that can be adapted for the sensor-based detection of other biotoxins and/or microbes

    Workplace Homicides: Reconsidering the Role of Firearms

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    Abstract The number of fatal, intentional workplace shootings rose 15% in 2015 from 2014. Workplace homicides remain a leading cause of occupational death, fourth among males and second among females. Workplaces that allow employees to carry a firearm are at 5-times greater odds of having a workplace homicide compared to workplaces that do not. Prevention efforts largely focus on preventing robbery-motivated crimes, which constitute between 55% to 60% of deaths each year. Workplace homicides are largely a firearms issue, as perpetrators use firearms in nearly 80% of all deaths. There is a need to understand firearm exposure at work, laws that restrict employers’ ability to govern firearm exposure at work, and how state laws designed to affect firearm exposure impact firearm-related workplace homicides. This dissertation contains six chapters. Chapter one provides an introduction to occupational safety and health, workplace homicide trends, and state-level firearm policy. It also provides a rationale for this research and offers specific research questions. Chapter two epidemiologically examines how perpetrators accessed firearms to commit workplace homicides from 2011-2015. Among the firearm-related workplace homicides where firearm access points were able to be categorized, proximal and distal firearm access played a large role in escalating arguments into argumentative workplace homicides, particularly for customers and employees. Chapter three is a legal analysis of a set of state laws that restrict employers’ ability to limit employee firearm storage in motor vehicles at work, referred to as parking lot laws. The 16 existing parking lot laws displayed similar characteristics. More than half of the laws released employers from civil liability for events resulting from an employee storing a firearm in their car at work. Chapter four is a longitudinal panel analysis of the impact of state-level laws on firearm-related workplace homicides from 1992-2015. Right-to-carry laws were associated with a 32% increase in the rate of firearm-related workplace homicides. Chapter five provides additional methodologic detail for Chapters two, three, and four. Chapter six provides a summary of findings, areas of future research, and implications. Customer and employee firearm access plays a large role in escalating arguments to argumentative workplace deaths. Given right-to-carry laws’ impact on loaded handgun carrying, it is unsurprising that states with these laws have greater rates of firearm-related workplace homicides. Right-to-carry laws generally allow private property owners to prohibit firearms from their premises. Yet, parking lot laws limit the ability of employers to prohibit employee firearm access within parking lots. Overall, firearm exposure within the workplace is likely detrimental to workers’ safety and health and efforts to restrict employee firearm exposure are needed

    Morphine for elective endotracheal intubation in neonates: a randomized trial [ISRCTN43546373]

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    BACKGROUND: Elective endotracheal intubations are still commonly performed without premedication in many institutions. The hypothesis tested in this study was that morphine given prior to elective intubations in neonates would decrease fluctuations in vital signs, shorten the duration of intubation and reduce the number of attempts. METHODS: From December 1999 to September 2000, infants of all gestations admitted to a level III neonatal intensive care unit and requiring an elective endotracheal intubation were randomly assigned to receive morphine 0.2 mg/kg IV or placebo 5 minutes before intubation. Duration of severe hypoxemia (HR< 90/min and Sp0(2)<85%), duration of procedure, duration of hypoxemia (Sp0(2)<85%), number of attempts and change in mean blood pressure were compared between groups. RESULTS: 34 infants (median 989 g and 28 weeks gestation) were included. The duration of severe hypoxemia was similar between groups. Duration of procedure, duration of hypoxemia, number of attempts and increases in mean blood pressure were also similar between groups. 94% of infants experienced bradycardia during the procedure. CONCLUSION: We failed to demonstrate the effectiveness of morphine in reducing the physiological instability or time needed to perform elective intubations. Alternatives, perhaps with more rapid onset of action, should be considered

    Comparison of Accelerated Solvent Extraction (ASE) and Energized Dispersive Guided Extraction (EDGE) for the Analysis of Pesticides in Leaves

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    Various techniques have been evaluated for the extraction and cleanup of pesticides from environmental samples. In this work, a Selective Pressurized Liquid Extraction (SPLE) method for pesticides was developed using a Thermo Fisher Scientific Accelerated Solvent Extraction (ASE) system. This instrument was compared to the newly introduced (2017) extraction instrument, the Energized Dispersive Guided Extraction (EDGE) system, which combines Pressurized Liquid Extraction (PLE) and dispersive Solid Phase Extraction (dSPE). We first optimized the SPLE method using the ASE instrument for pesticide extraction from alfalfa leaves using layers of Florisil and graphitized carbon black (GCB) downstream of the leaf homogenate in the extraction cell (Layered ASE method). We then compared results obtained for alfalfa and citrus leaves with the Layered ASE method to those from a method in which the leaf homogenate and sorbents were mixed (Mixed ASE method) and to similar methods modified for use with EDGE (Layered EDGE and Mixed EDGE methods). The ASE and EDGE methods led to clear, colorless extracts with low residual lipid weight. No significant differences in residual lipid masses were observed between the methods. The UV-Vis spectra showed that Florisil removed a significant quantity of the light-absorbing chemicals, but that GCB was required to produce colorless extracts. Recoveries of spiked analytes into leaf homogenates were generally similar among methods, but in several cases, significantly higher recoveries were observed in ASE extracts. Nonetheless, no significant differences were observed among pesticide concentrations in field samples when calculated with the isotope dilution method in which labelled surrogates were added to samples before extraction. The extraction time with the ASE methods was ~45 minutes, which was ~4.5 times longer than with the EDGE methods. The EDGE methods used ~10 mL more solvent than the ASE methods. Based on these results, the EDGE is an acceptable extraction instrument and, for most compounds, the EDGE had a similar extraction efficiency to the ASE methods

    Investigating the Effects of Zero Balancing on the Physical, Mental, Emotional, and Spiritual Dimensions of Wellness: A Phenomenological MIxed Methods Pilot Study

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    Background: Today, the necessity for relieving undue stress on the physical, mental, emotional, and spiritual levels is evident at this time of concomitant global crises from the pandemic, societal inequity, and climatic challenges. Methods to restore and enhance human well-being are critically needed.The study of overall wellness has not yet included the role that skilled, conscious touch may play in supporting the dimensions of wellness, an awareness of which this study seeks to elevate by exploring the effects of receiving positive touch on the physical, mental, emotional, and spiritual dimensions of wellness. Methods: The researchers chose to utilize a concurrent mixed-methods hermeneutic phenomenological research design. The quantitative aspect of this study included pre/post-session surveys assessed with a paired sample t-test along with descriptive statistics. Sixteen people were viewed as “cases” and interviewed for discovery on the essence of receiving Zero Balancing sessions and the impact of ZB on the physical, mental, emotional, and spiritual dimensions of health. Qualitative data was assessed for themes. Results: Analysis revealed that the essence of Zero Balancing was integration. The paired sample t-test showed a significant increase in the overall feeling of wellness after the fourth Zero Balancing at p\u3c .001 level. Conclusions: Based on the results of this study we conclude that Zero Balancing is an integrative, low cost, simply administered, holistic therapy with multiple benefits. We also suggest this body therapy, with its focus on skilled, conscious touch, does facilitate wellness in the physical, emotional, mental, and spiritual dimensions of wellness

    Measures of Obesity Associated with Asthma Diagnosis in Ethnic Minority Children

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    Objective. The study objective was to examine relationships between different body size measurements and asthma in ethnic minority children. Methods. We used data from a community-based study of 505 children aged 6-to-8 years old to study the association of percent body fat, fat distribution, and BMI percentile with asthma diagnosis. Poisson regression models were used to compute prevalence ratios (PRs) for sex-specific quintiles of the body fat measures on the main outcome of asthma. Results. When comparing the highest quintile of each body fat measure to the combined lowest two quintiles, higher body mass index percentile, percent body fat, and waist circumference all were associated with a higher likelihood of physician-diagnosed asthma (PR = 1.63 (95% CI 1.12–2.39), 1.50 (95% CI 1.02–2.21), and 1.56 (95% CI 1.04–2.34), resp.). Conclusions. This study found a significant association between increased body size and asthma diagnosis, regardless of the measurement examined

    Pleurocidin-family cationic antimicrobial peptides are cytolytic for breast carcinoma cells and prevent growth of tumor xenografts

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    Introduction: Cationic antimicrobial peptides (CAPs) defend against microbial pathogens; however, certain CAPs also exhibit anticancer activity. The purpose of this investigation was to determine the effect of the pleurocidin-family CAPs, NRC-03 and NRC-07, on breast cancer cells. Methods: MTT (3-(4,5-dimethylthiazol-2-yl)2,5-diphenyltetrazolium bromide) and acid phosphatase cell-viability assays were used to assess NRC-03- and NRC-07-mediated killing of breast carcinoma cells. Erythrocyte lysis was determined with hemolysis assay. NRC-03 and NRC-07 binding to breast cancer cells and normal fibroblasts was assessed with fluorescence microscopy by using biotinylated-NRC-03 and -NRC-07. Lactate dehydrogenase-release assays and scanning electron microscopy were used to evaluate the effect of NRC-03 and NRC-07 on the cell membrane. Flow-cytometric analysis of 3,3'-dihexyloxacarbocyanine iodide- and dihydroethidium-stained breast cancer cells was used to evaluate the effects of NRC-03 and NRC-07 on mitochondrial membrane integrity and reactive oxygen species (ROS) production, respectively. Tumoricidal activity of NRC-03 and NRC-07 was evaluated in NOD SCID mice bearing breast cancer xenografts. Results: NRC-03 and NRC-07 killed breast cancer cells, including drug-resistant variants, and human mammary epithelial cells but showed little or no lysis of human dermal fibroblasts, umbilical vein endothelial cells, or erythrocytes. Sublethal doses of NRC-03 and, to a lesser extent, NRC-07 significantly reduced the median effective concentration (EC 50) of cisplatin for breast cancer cells. NRC-03 and NRC-07 bound to breast cancer cells but not fibroblasts, suggesting that killing required peptide binding to target cells. NRC-03- and NRC-07-mediated killing of breast cancer cells correlated with expression of several different anionic cell-surface molecules, suggesting that NRC-03 and NRC-07 bind to a variety of negatively-charged cell-surface molecules. NRC-03 and NRC-07 also caused significant and irreversible cell-membrane damage in breast cancer cells but not in fibroblasts. NRC-03- and NRC-07-mediated cell death involved, but did not require, mitochondrial membrane damage and ROS production. Importantly, intratumoral administration of NRC-03 and NRC-07 killed breast cancer cells grown as xenografts in NOD SCID mice. Conclusions: These findings warrant the development of stable and targeted forms of NRC-03 and/or NRC-07 that might be used alone or in combination with conventional chemotherapeutic drugs for the treatment of breast cancer.Peer reviewed: YesNRC publication: Ye
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