64 research outputs found

    Analysis of Fire-Induced Circulations During the Fireflux2 Experimental Burn and Operational Rate of Spread Models

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    In this study, the fire-induced circulations were analyzed during the FireFlux2 (FF2) experimental burn using WRF-SFIRE to directly quantify the effects of the fire on local conditions. We utilized observational data from the FF2 burn and numerical simulations to assess the impacts of fire on local micrometeorology under ∼12m/s winds. Two simulations were executed. One in a two-way coupled mode and one in a one-way coupled mode. The difference between the simulations was used to quantify the fire impacts on the circulation at the head and flanks of the fire. The fire-induced horizontal winds indicated the strongest fire-induced flow at the lowest measurement levels of the head fire (as high as 3.76 m/s) decreasing to 0.3 m/s at 20m above the ground. As a result, the most noticeable impacts of the fire-induced circulation on the fire rate of spread (ROS) were at the head fire. However, there were significant differences between the simulated and observed fire progression at the flanks. To examine to what degree, the observed discrepancies can be associated with the ROS algorithm used in the coupled fire-atmosphere model, two implementations of the Rothermel model as well as the Balbi model were examined. By running experiments in varying winds, fuel moisture and topography, we found the Balbi model is generally less sensitive to changes in the local conditions than the Rothermel model, providing a lower ROS. To investigate the features of the particular Rothermel model implementation in SFIRE, we compared it to the Behave model. We identified significant differences between the models which included different calculations within the model and different data which led to varying results between the two implementations of the same Rothermel model. The implementation of the Behave-based algorithm in WRF-SFIRE enabled using the 40 Scott and Burgan (S&B) fuel classifications not available before. Multiple simulations were run to analyze the behavior of the S&B fuels compared to the Albini fuels. Although many simulations produced similar burning characteristic, some S&B fuels burned differently than their equivalents in the Albini categories and resulted in a different atmospheric effects

    Effects of Combining Whole Body Vibration and Moderately-Heavy Back Squat on Vertical Jump Height in Collegiate Level Volleyball Players

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    The purpose of this study was to examine whether a combination of a low volume, moderately-heavy (80% 1RM) back squat combined with whole body vibration would optimize the post activation potentiation (PAP) response compared to a set of low volume, moderately-heavy back squat without vibration in Division I collegiate female volleyball players. The study design consisted of two groups (n = 5, n = 5) of current Eastern Illinois University female volleyball players matched by 1RM back squat strength. Prior to the experimental intervention, subjects in each group attended two sessions during which standing reach height and demographic information ( age, height, weight, body mass) were obtained and familiarity with the procedures and equipment were achieved. Subjects in each group began the experimental session by completing a five minute dynamic lower body warm-up followed by two baseline maximal effort countermovement jumps (CMJ) measured using a Vertec device. Following an active rest period subjects in both sessions were instructed to complete two ascending sets of back squats and then a single set of moderately-heavy back squat either with or without standing on a Vibeplate platform. Following the back squats, subjects completed two final maximal effort CMJ. Baseline and final CMJ heights were compared following each session to determine the possible presence of a PAP effect. Statistical analysis using an independent t-test showed no mean significance between group CMJ heights. Individual variations of CMJ height existed in both groups and further research with EMG recording devices is needed to determine the presence of PAP. The findings of the current study found no superiority of a combination protocol over a back squat only protocol at improving vertical jump height. Without additional measures, interpretation of whether the observed individual variations in CMJ height in this study were the result of a PAP effect or simply by chance is equivocal

    PENDAMPINGAN PENGELOLAAN UMKMDI KECAMATAN TALUN KABUPATEN CIREBON-JAWA BARAT

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    PENDAMPINGAN PENGELOLAAN UMKMDI KECAMATAN TALUN KABUPATEN CIREBON-JAWA BARA

    Correlates of Snake Entanglement in Erosion Control Blankets

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    In road construction projects across the United States, erosion control methods (e.g., erosion control blankets [ECBs]), are mandated to stimulate seedbed regeneration and prevent soil loss. Previous reports have suggested that snakes are vulnerable to entanglement in ECBs. We conducted a literature review, field surveys, and an entanglement experiment to examine what factors increase a snake’s risk of ECB entanglement. Our literature review produced reports of 175 reptiles entangled in mesh products, 89.1% of which were snakes, with 43.6% of snake entanglements occurring in erosion control products. During our field surveys, we found 10 entangled snakes (n = 2 alive; n = 8 dead). From our experiment, we found that ECBs that contain fixed‐intersection, small‐diameter mesh consisting of polypropylene were significantly more likely to entangle snakes compared with ECBs with larger diameter polypropylene mesh or ECBs that have woven mesh made of natural fibers. Snake body size was also associated with entanglement; for every 1‐mm increase in body circumference, the probability of entanglement increased 4%. These results can help construct a predictive framework to determine those species and individuals that are most vulnerable to entanglement

    The genetic prehistory of the Greater Caucasus

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    5月16日,厦门大学人类学系、德国马普所、德国考古所、俄罗斯文化遗产联合会、奥地利维也纳大学人类学系、爱尔兰都柏林大学学院考古系、罗蒙诺索夫莫斯科国立大学考古系和人类学博物馆、俄罗斯国立东方艺术博物馆、俄罗斯联邦达吉斯坦考古与民族志研究所历史系、美国韦尔斯利学院人类学系、瑞士巴塞尔大学史前与考古科学研究所、德国国家遗产博物馆等36家单位的46位共同作者组成的国际合作团队在BioRxiv上预发表论文《The genetic prehistory of the Greater Caucasus》,厦门大学人类学系王传超研究员为论文的第一作者和通讯作者,也是该国际团队中的唯一一位来自中国的合作者。【Abstract】Archaeogenetic studies have described the formation of Eurasian 'steppe ancestry' as a mixture of Eastern and Caucasus hunter-gatherers. However, it remains unclear when and where this ancestry arose and whether it was related to a horizon of cultural innovations in the 4th millennium BCE that subsequently facilitated the advance of pastoral societies likely linked to the dispersal of Indo-European languages. To address this, we generated genome-wide SNP data from 45 prehistoric individuals along a 3000-year temporal transect in the North Caucasus. We observe a genetic separation between the groups of the Caucasus and those of the adjacent steppe. The Caucasus groups are genetically similar to contemporaneous populations south of it, suggesting that - unlike today - the Caucasus acted as a bridge rather than an insurmountable barrier to human movement. The steppe groups from Yamnaya and subsequent pastoralist cultures show evidence for previously undetected Anatolian farmer-related ancestry from different contact zones, while Steppe Maykop individuals harbour additional Upper Palaeolithic Siberian and Native American related ancestry.This work was funded by the Max Planck Society and the German Archaeological Institute (DAI). C.C.W. was funded by Nanqiang Outstanding Young Talents Program of Xiamen University (X2123302) and the Fundamental Research Funds for the Central Universities. 该研究由德国马普学会、德国考古所、厦门大学南强青年拔尖人才支持计划资助

    Ancient human genome-wide data from a 3000-year interval in the Caucasus corresponds with eco-geographic regions

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    Archaeogenetic studies have described the formation of Eurasian 'steppe ancestry' as a mixture of Eastern and Caucasus hunter-gatherers. However, it remains unclear when and where this ancestry arose and whether it was related to a horizon of cultural innovations in the 4 th millennium BCE that subsequently facilitated the advance of pastoral societies in Eurasia. Here we generated genome-wide SNP data from 45 prehistoric individuals along a 3000-year temporal transect in the North Caucasus. We observe a genetic separation between the groups of the Caucasus and those of the adjacent steppe. The northern Caucasus groups are genetically similar to contemporaneous populations south of it, suggesting human movement across the mountain range during the Bronze Age. The steppe groups from Yamnaya and subsequent pastoralist cultures show evidence for previously undetected farmer-related ancestry from different contact zones, while Steppe Maykop individuals harbour additional Upper Palaeolithic Siberian and Native American related ancestry

    Social Interactions at the 2014 SciTS Conference

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    <p>RDF dataset generated from interactions between participating attendees of the 2014 joint VIVO/SciTS Conference. Data was gathered using a cyber-physical system created by Nick Benik in 2012, rewritten in 2013, and further updated in 2014.</p> <p>See link for more information and visualization of data.</p

    Social Interactions at the VIVO 2012 Conference

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    <p>This is the RDF dataset generated by my "Realtime Semantic Networking" application.  This application was submitted (and won) the VIVO Conference Apps competition at the VIVO2012 conference.  Conference attendees used their smart phones to scan QR codes on each other's name badges.  These intereactions gave the those who scanned someone's name badge a list of research terms extracted from that user's publications (via VIVO-ontology aware web crawlers) or terms that the scanned user manually entered.  These scan interactions were recorded and later used to create a map showing the social network of the conference's attendees who participated. [284 scan events between 61 active users over 2 days]</p

    i2b2 Modern Web Client Plugin Development

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    A description of functionality that is used by or of interest to developers in making new plugins for the modernized i2b2 web client.</p
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