1,946 research outputs found

    The Legal Status and Responsibilities of Private Internet Users Under the Law of Armed Conflict: A Primer for the Unwary on the Shape of Law to Come

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    This Essay is speculative in the sense that the law of armed conflict has not yet been extended to cover warfare waged over the World Wide Web. Therefore, potential risks posed for private-citizen users of the Internet are based on an extrapolation from existing principles of the law of armed conflict. It is, however, a modest extrapolation. Private-citizen Internet users who want to protect themselves in the cyber-realm will be well served to assume that the line of thinking presented in this Essay reflects the shape of law to come

    The story behind the plot: About the propositionality of visually presented argumentation

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    When we define argumentation as a communicative activity aimed at convincing a reasona-ble critic of the acceptability of a standpoint by putting forward information justifying or refuting this standpoint, it is clear that elements of this information can be brought forward in other than verbal modes. An important question is then whether visually presented information needs to be translatable into a set of propositions as traditional definitions require. The answer is: not always

    A novel method for RNA extraction from FFPE samples reveals significant differences in biomarker expression between orthotopic and subcutaneous pancreatic cancer patient-derived xenografts.

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    Next-generation sequencing (NGS) can identify and validate new biomarkers of cancer onset, progression and therapy resistance. Substantial archives of formalin-fixed, paraffin-embedded (FFPE) cancer samples from patients represent a rich resource for linking molecular signatures to clinical data. However, performing NGS on FFPE samples is limited by poor RNA purification methods. To address this hurdle, we developed an improved methodology for extracting high-quality RNA from FFPE samples. By briefly integrating a newly-designed micro-homogenizing (mH) tool with commercially available FFPE RNA extraction protocols, RNA recovery is increased by approximately 3-fold while maintaining standard A260/A280 ratios and RNA quality index (RQI) values. Furthermore, we demonstrate that the mH-purified FFPE RNAs are longer and of higher integrity. Previous studies have suggested that pancreatic ductal adenocarcinoma (PDAC) gene expression signatures vary significantly under in vitro versus in vivo and in vivo subcutaneous versus orthotopic conditions. By using our improved mH-based method, we were able to preserve established expression patterns of KRas-dependency genes within these three unique microenvironments. Finally, expression analysis of novel biomarkers in KRas mutant PDAC samples revealed that PEAK1 decreases and MST1R increases by over 100-fold in orthotopic versus subcutaneous microenvironments. Interestingly, however, only PEAK1 levels remain elevated in orthotopically grown KRas wild-type PDAC cells. These results demonstrate the critical nature of the orthotopic tumor microenvironment when evaluating the clinical relevance of new biomarkers in cells or patient-derived samples. Furthermore, this new mH-based FFPE RNA extraction method has the potential to enhance and expand future FFPE-RNA-NGS cancer biomarker studies

    Consistency between ARPES and STM measurements on SmB6_6

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    Strongly correlated topological surface states are promising platforms for next-generation quantum applications, but they remain elusive in real materials. The correlated Kondo insulator SmB6_6 is one of the most promising candidates, with theoretically predicted heavy Dirac surface states supported by transport and scanning tunneling microscopy (STM) experiments. However, a puzzling discrepancy appears between STM and angle-resolved photoemission (ARPES) experiments on SmB6_6. Although ARPES detects spin-textured surface states, their velocity is an order of magnitude higher than expected, while the Dirac point -- the hallmark of any topological system -- can only be inferred deep within the bulk valence band. A significant challenge is that SmB6_6 lacks a natural cleavage plane, resulting in ordered surface domains limited to 10s of nanometers. Here we use STM to show that surface band bending can shift energy features by 10s of meV between domains. Starting from our STM spectra, we simulate the full spectral function as an average over multiple domains with different surface potentials. Our simulation shows excellent agreement with ARPES data, and thus resolves the apparent discrepancy between large-area measurements that average over multiple band-shifted domains and atomically-resolved measurements within a single domain

    Attitudes and Practice Patterns in the Use of OMM in Patients with Serious Illness

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    INTRODUCTION: In addition to evidence-based medicine, the osteopathic approach to person-centered care consists of the osteopathic philosophy of integrated structure and function and applying manual techniques to treat somatic dysfunction. Known collectively as Osteopathic Manipulative Medicine (OMM), this approach can be utilized when treating patients with both chronic and acute conditions; however, there is limited data on how often or to what extent OMM is used to treat pain and other symptoms in patients facing serious or life-limiting illnesses. METHODS: A voluntary, anonymous survey was created to capture the practice patterns and attitudes of osteopathic physicians, regardless of specialty, in the uses and benefits of OMM in treating patients with serious illness. The survey was approved by the IRB and designed using a Likert-scale, multiple choice format using Redcap software and permission to distribute the survey electronically was granted from various national and local professional organizations including the American Osteopathic Association (AOA), Pennsylvania Osteopathic Medical Association (POMA) and the PCOM alumni association. Among key data analyzed were the frequency of OMM use in serious or life-limiting illness (Cancer, CHF, and COPD), attitudes about OMM, beliefs about OMM, and use of OMM in older adults. RESULTS: Osteopathic Physicians that utilize OMM when treating patients with serious illness have found OMM to be beneficial when treating certain conditions such as chronic and musculoskeletal pain, shortness of breath, and nausea. The physicians who use OMM also felt comfortable and proficient when utilizing it to treat certain conditions. They also felt their foundation in osteopathic Medicine enabled them to approach and care for patients with empathy and compassion. DISCUSSION: OMM is used by many osteopathic physicians when treating pain and other symptoms of patients who have serious illness. OMM has been found to be beneficial when treating conditions related to CHF, COPD, and Cancer. Osteopathic Physicians who do utilize Osteopathic Manipulative Medicine believe that their training has allowed them to engage and treat patients with compassion and empathy

    Visions, Participation and Engagement in New Community Information Infrastructures

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    Through the past seven years, our research group has engaged in a participatory action research collaboration with a variety of community partners to explore understandings, possibilities, and commitments for a new community networking infrastructure in State College, Pennsylvania. This paper describes a case study of multifaceted information technology infrastructures, and of collaborating with the plethora of actors and institutions that are stakeholders in such infrastructures. Information technology projects increasingly depend upon the commitment and energies of a great diversity of stakeholders. Understanding better how such broad projects move forward is critical to society.(I do not speak Spanish well enough to translate the abstract. I will be able to have a colleague make high-quality Spanish translation, if the paper is published in JCI)

    Male Pattern Baldness in Relation to Prostate Cancer–Specific Mortality: A Prospective Analysis in the NHANES I Epidemiologic Follow-up Study

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    We used male pattern baldness as a proxy for long-term androgen exposure and investigated the association of dermatologist-assessed hair loss with prostate cancer–specific mortality in the first National Health and Nutrition Examination Survey Epidemiologic Follow-up Study. From the baseline survey (1971–1974), we included 4,316 men who were 25–74 years of age and had no prior cancer diagnosis. We estimated hazard ratios and used Cox proportional hazards regressions with age as the time metric and baseline hazard stratified by baseline age. A hybrid framework was used to account for stratification and clustering of the sample design, with adjustment for the variables used to calculate sample weights. During follow-up (median, 21 years), 3,284 deaths occurred; prostate cancer was the underlying cause of 107. In multivariable models, compared with no balding, any baldness was associated with a 56% higher risk of fatal prostate cancer (hazard ratio = 1.56; 95% confidence interval: 1.02, 2.37), and moderate balding specifically was associated with an 83% higher risk (hazard ratio = 1.83; 95% confidence interval: 1.15, 2.92). Conversely, patterned hair loss was not statistically significantly associated with all-cause mortality. Our analysis suggests that patterned hair loss is associated with a higher risk of fatal prostate cancer and supports the hypothesis of overlapping pathophysiological mechanisms

    Spatial Awareness is Related to Moderate Intensity Running during a Collegiate Rugby Match

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    International Journal of Exercise Science 9(5): 599-606, 2016. The purpose of the present study was to evaluate the relationship between spatial awareness, agility, and distance covered in global positioning system (GPS) derived velocity zone classifications during a collegiate rugby match. Twelve American collegiate rugby union players (mean±SD; age: 21.2±1.4 y; weight: 85.0±16.0 kg; 7 forwards & 5 backs) on a single team volunteered to participate in this investigation. The distances travelled at low (walking/jogging; \u3c2.7m/s), moderate (cruising/striding; 2.7-5.0 m/s), and high intensities (running/sprinting; \u3e5.0 m/s) were measured for each player using GPS sensors and normalized according to playing time during an official USA Rugby match. Spatial awareness was measured as visual tracking speed from one core session of a 3-dimensional multiple-object-tracking speed (3DMOTS) test (1.35±0.59 cm·sec-1). Agility was assessed utilizing the pro agility (5.05±0.28 sec) and t drill (10.62±0.39 sec). Analysis of variance revealed that athletes travelled the greatest distance during walking/jogging (39.5±4.5 m·min-1) and least distance during running/sprinting (4.9±3.5 m·min-1). Pearson product moment correlations revealed that only distance covered while cruising/striding (20.9±6.5 m·min-1) was correlated to spatial awareness (r=0.798, p=0.002). Agility did not correlate to distance covered at any velocity zone or spatial awareness. Spatial awareness, as determined by 3DMOTS, appears to be related to the moderate intensity movement patterns of rugby union athletes
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