Tank Tests of Twin Seaplane Floats

The following report contains the most essential data for the hydrodynamic portion of the twin-float problem. The following points were successfully investigated: 1) difference between stationary and nonstationary flow; 2) effect of the shape of the step; 3) effect of distance between floats; 4) effect of nose-heavy and tail-heavy moments; 5) effect of the shape of floats; 6) maneuverability

Hubungan Power Otot Tungkai dengan Hasil Lompat Jauh pada Siswa Putra Kelas VIII SMP N 8 Benai Kabupaten Kuantan Singingi

This research was conducted to determine whether there are relation of power leg muscle with long jump sport when making the leap so that when doing it can obtain maximum results. This research is a form of correlation study, which a population of male students clas VIII SMP Negeri 8 Benai Kuantan Singingi regency, consisted of 20 people. the data is processed with saturated sampling technique. The sample in this study is the all of the population, so that the sampel counted to 20 people. The istrument used in this study is test explosive power leg muscle with used standing broad jump instrument and long jump tests. after that, the data is processed with statistic, to test for normality with liliefors test at significant level. Hypothesis, there are relation of power leg muscle in the long jump results. Based on data analysis produced there are relation between power leg muscle (X) with long jump results (Y) of male students SMP Negeri 8 Benai Kuantan Singingi regency in the calculation produces 0,488 r count> 0,444 t table. There is relationship between power muscle leg (X) with long jump results (Y). It can be concluded that Ho is rejected and Ha is received, it shows that there is relationship between two variables

Flat-band ferromagnetism induced by off-site repulsions

Density matrix renormalization group method is used to analyze how the nearest-neighbor repulsion V added to the Hubbard model on 1D triangular lattice and a railway trestle (t-t') model will affect the electron-correlation dominated ferromagnetism arising from the interference (frustration). Obtained phase diagram shows that there is a region in smaller-t' side where the critical on-site repulsion above which the system becomes ferromagnetic is reduced when the off-site repulsion is introduced.Comment: 4 pages, RevTex, 6 figures in Postscript, to be published in Phys. Rev.

Instability of scale-free networks under node-breaking avalanches

The instability introduced in a large scale-free network by the triggering of node-breaking avalanches is analyzed using the fiber-bundle model as conceptual framework. We found, by measuring the size of the giant component, the avalanche size distribution and other quantities, the existence of an abrupt transition. This test of strength for complex networks like Internet is more stringent than others recently considered like the random removal of nodes, analyzed within the framework of percolation theory. Finally, we discuss the possible implications of our results and their relevance in forecasting cascading failures in scale-free networks.Comment: 4 pages, 4 figures, final version to be published in Europhys. Let

Argatroban During Percutaneous Transluminal Coronary Angioplasty: Results of a Dose-Verification Study.

Background. Thrombin is a key enzyme in thrombogenesis. In animals, specific antithrombotic therapy at the time of coronary angioplasty reduced the incidence of subacute occlusion and inhibited the restenosis response. Argatroban is a highly selective synthetic thrombin antagonist that binds in a competitive manner. This is a report of a dose-verification study, assessing the safety and feasibility of intravenous Argatroban administration in patients undergoing percutaneous transluminal coronary angioplasty. Methods. Before angioplasty an intravenous bolus of 30 g/kg argatroban was administered, followed by a continuous infusion of 3.5 g/kg/min for 72 hours. Bolus injection was repeated, and the infusion rate was increased in order to achieve an activated coagulation time (ACT) of over 300 seconds. Following interim analysis, the bolus and initial infusion rate for the subsequent treatment groups was determined. Study endpoints were the occurrence of adverse events, coagulation tests, and qualitative angiogram reading. Patients were monitored by continuous 12-lead electrocardiographic recording over 24 hours, and underwent control angiography 18–24 hours following angioplasty. Results. Four treatment groups, comprised of 2, 8, 9, and 11 patients, respectively, were studied. The first two patients were excluded from analysis, since the initial dose was ineffective to attain an ACT-authorizing coronary angioplasty. The group with the highest dosage received a 250 g/kg intravenous bolus of argatroban, followed by a 4 hour infusion of 15 g/kg/min. At 4 hours the infusion rate was lowered to 3.8 g/kg/min and was continued for 68 hours without adjustment for catheter removal. The adverse event profile included myocardial infarction, aortocoronary bypass graft, bailout procedures, and repeat coronary angioplasty. Thrombin-time (TT), activated partial thromboplastin time (APTT), and prothrombin time (PT) were significantly related to argatroban plasma concentration, as demonstrated by regression analyses (R-square 0.64, 0.71, and 0.84, respectively). Prothrombin fragments 1 and 2 and thrombin-antithrombin III complex did not fit into a mathematical model, but showed slightly increased levels after reduction or cessation of the infusion rate. Conclusions. This dose-verification study, including 30 patients at four dose levels, indicated that argatroban infusion in coronary angioplasty patients can be administered safely, and results in an adequate and predictable level of anticoagulation

Tight-binding study of high-pressure phase transitions in titanium: alpha to omega and beyond

We use a tight-binding total energy method, with parameters determined from a fit to first-principles calculations, to examine the newly discovered gamma phase of titanium. Our parameters were adjusted to accurately describe the alpha Ti-omega Ti phase transition, which is misplaced by density functional calculations. We find a transition from omega Ti to gamma Ti at 102 GPa, in good agreement with the experimental value of 116 GPa. Our results suggest that current density functional calculations will not reproduce the omega Ti-gamma Ti phase transition, but will instead predict a transition from omega Ti to the bcc beta Ti phase.Comment: 3 encapsulated Postscript figures, submitted to Phyical Review Letter

Inter- and intra-observer variability in the qualitative categorization of coronary angiograms.

The ABC classification of the American College of Cardiology and the American Heart Association is a commonly used categorization to estimate the risk and success of intracoronary intervention, as well as the probability of restenosis. To evaluate the reliability of qualitative angiogram readings, we randomly selected 200 films from single lesion angioplasty procedures. A repeated visual assessment (> or = 2 months interval) by two independent observers resulted in kappa values of inter and intra-observer variability for the ABC lesion classification and for all separate items that compile it. Variability in assessment is expressed in percentage of total agreement, and in kappa value, which is a parameter of the agreement between two or more observations in excess of the chance agreement. Percentage of total agreement and kappa value was 67.8% and 0.33 respectively for the ABC classification, indicating a poor agreement. Probably this is due to the deficiency of strict definitions. Further investigation has to demonstrate whether improvement can be achieved using complete and detailed definitions without ambiguity, and consensus after panel assessment

Circulating sclerostin levels are positively related to coronary artery disease severity and related risk factors

Romosozumab is a newly available treatment for osteoporosis acting by sclerostin inhibition. Its cardiovascular safety has been questioned after finding excess cardiovascular disease (CVD)‐related events in a pivotal phase 3 trial. Previous studies of relationships between circulating sclerostin levels and CVD and associated risk factors have yielded conflicting findings, likely reflecting small numbers and selected patient groups. We aimed to characterize relationships between sclerostin and CVD and related risk factors in more detail by examining these in two large cohorts, Ludwigshafen Risk and Cardiovascular Health study (LURIC; 34% female, mean age 63.0 years) and Avon Longitudinal Study of Parents and Children study (ALSPAC) mothers (mean age 48.1 years). Together these provided 5069 participants with complete data. Relationships between sclerostin and CVD risk factors were meta‐analyzed, adjusted for age, sex (LURIC), body mass index, smoking, social deprivation, and ethnicity (ALSPAC). Higher sclerostin levels were associated with higher risk of diabetes mellitus (DM) (odds ratio [OR] = 1.25; 95% confidence interval [CI] 1.12, 1.37), risk of elevated fasting glucose (OR 1.15; CI 1.04, 1.26), and triglyceride levels (β 0.03; CI 0.00, 0.06). Conversely, higher sclerostin was associated with lower estimated glomerular filtration rate (eGFR) (β −0.20; CI −0.38, −0.02), HDL cholesterol (β −0.05; CI −0.10, −0.01), and apolipoprotein A‐I (β −0.05; CI −0.08, −0.02) (difference in mean SD per SD increase in sclerostin, with 95% CI). In LURIC, higher sclerostin was associated with an increased risk of death from cardiac disease during follow‐up (hazard ratio [HR] = 1.13; 1.03, 1.23) and with severity of coronary artery disease on angiogram as reflected by Friesinger score (0.05; 0.01, 0.09). Associations with cardiac mortality and coronary artery severity were partially attenuated after adjustment for risk factors potentially related to sclerostin, namely LDL and HDL cholesterol, log triglycerides, DM, hypertension, eGFR, and apolipoprotein A‐I. Contrary to trial evidence suggesting sclerostin inhibition leads to an increased risk of CVD, sclerostin levels appear to be positively associated with coronary artery disease severity and mortality, partly explained by a relationship between higher sclerostin levels and major CVD risk factors. © 2021 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR)

Priorities for research in child maltreatment, intimate partner violence and resilience to violence exposures: results of an international Delphi consensus development process

Background Intimate partner violence (IPV) and child maltreatment (CM) are major global public health problems. The Preventing Violence Across the Lifespan (PreVAiL) Research Network, an international group of over 60 researchers and national and international knowledge-user partners in CM and IPV, sought to identify evidence-based research priorities in IPV and CM, with a focus on resilience, using a modified Delphi consensus development process. Methods Review of existing empirical evidence, PreVAiL documents and team discussion identified a starting list of 20 priorities in the following categories: resilience to violence exposure (RES), CM, and IPV, as well as priorities that cross-cut the content areas (CC), and others specific to research methodologies (RM) in violence research. PreVAiL members (N = 47) completed two online survey rounds, and one round of discussions via three teleconference calls to rate, rank and refine research priorities. Results Research priorities were: to examine key elements of promising or successful programmes in RES/CM/IPV to build intervention pilot work; CC: to integrate violence questions into national and international surveys, and RM: to investigate methods for collecting and collating datasets to link data and to conduct pooled, meta and sub-group analyses to identify promising interventions for particular groups. Conclusions These evidence-based research priorities, developed by an international team of violence, gender and mental health researchers and knowledge-user partners, are of relevance for prevention and resilience-oriented research in the areas of IPV and CM

Priorities for research in child maltreatment, intimate partner violence and resilience to violence exposures:results of an international Delphi consensus development process

BACKGROUND: Intimate partner violence (IPV) and child maltreatment (CM) are major global public health problems. The Preventing Violence Across the Lifespan (PreVAiL) Research Network, an international group of over 60 researchers and national and international knowledge-user partners in CM and IPV, sought to identify evidence-based research priorities in IPV and CM, with a focus on resilience, using a modified Delphi consensus development process. METHODS: Review of existing empirical evidence, PreVAiL documents and team discussion identified a starting list of 20 priorities in the following categories: resilience to violence exposure (RES), CM, and IPV, as well as priorities that cross-cut the content areas (CC), and others specific to research methodologies (RM) in violence research. PreVAiL members (N = 47) completed two online survey rounds, and one round of discussions via three teleconference calls to rate, rank and refine research priorities. RESULTS: Research priorities were: to examine key elements of promising or successful programmes in RES/CM/IPV to build intervention pilot work; CC: to integrate violence questions into national and international surveys, and RM: to investigate methods for collecting and collating datasets to link data and to conduct pooled, meta and sub-group analyses to identify promising interventions for particular groups. CONCLUSIONS: These evidence-based research priorities, developed by an international team of violence, gender and mental health researchers and knowledge-user partners, are of relevance for prevention and resilience-oriented research in the areas of IPV and CM