Evaluation of machine-aided indexing2

The Defense Documentation Center (DDC), a field activity of the Defense Supply Agency, implemented an automated indexing procedure in October 1973. This Machine-Aided Indexing (MAI) System [1] had been under development since 1969. The following is a report of several comparisons designed to measure the retrieval effectiveness of MAI and manual indexing procedures under normal operational conditions.Several definitions are required in order to clarify the MAI process as it pertains to these investigations. The MAI routines scan unedited text in the form of titles and abstracts. The output of these routines is called Candidate Index Terms. These word strings are matched by computer against an internal file of manually screened and cross-referenced terms called a Natural Language Data Base (NLDB). The NLDB differs from a standard thesaurus in that there is no related term category. Word strings which match the NLDB are accepted as valid MAI output. The mismatches are manually screened for suitability. Those accepted are added to the NLDB. If now, the original set of Candidate Index Terms is matched against the updated NLDB, the matched output is unedited MAI. If both the unedited matches and mismatches are further structured in accession order and sent to technical analysts for review, the output of that process is called edited MAI.The tests were designed to (a) compare unedited MAI with manual indexing, holding the indexing language and the retrieval technique constant; (b) compare edited MAI with unedited MAI, holding both the indexing and the retrieval technique constant; and (c) compare two different retrieval techniques, called simple and complex, while holding the indexing constant.     

Engaging Students in Science Courses: Lessons of Change from the Arctic

Where you live should have something to do with what you teach. In the Arctic, the idea of place-based education – teaching and sharing knowledge that is needed to live well – is central to the UARCTIC consortium and the 4^th International Polar Year educational reform effort. A place-based issue oriented context can engage students in chemistry concepts when it intersects with their experience and lives. This article examines the rationale and means of integrating local concerns such as world view, culture, traditional knowledge, and policy into both general and specialized chemistry courses. More broadly, capacious placebased issues should be widely adapted by all curriculum reform efforts to demonstrate the connectivity between science and societal understanding of technological options. A case in point is the inclusion of indigenous perspectives in a non-majors general chemistry course when the concepts of scientific method, ice and water resources, genetic engineering, and so forth are discussed. In a specialized course on radioactivity in the north, topics connected nuclear chemistry and radioactivity to people and energy. The local landscape should be central to science courses and involve issues relevant to stewardship, a component of the indigenous world view. The historical issues can be connected to current nuclear energy and uranium mining as they relate to the risks and benefits for the local community. This article will make the case that curriculum reform that focuses on real-world topics will not only engage students so that they perform well in class but also spark their interest so that they continue learning after the course is over.     

Neoliberalism,new public management and the sustainable development agenda of higher education: history,contradictions and synergies

This paper explores the ideological and the practical relationship between neoliberalism and New Public Management (NPM) and the sustainable development agenda of western higher education. Using the United Kingdom and specifically English universities as an example, it investigates the contradictions and the synergies between neoliberal and NPM ideologies and the pursuit and practice of the sustainability agenda, focusing in particular on education for sustainable development (ESD) and ESD research. This paper reveals a range of challenges and opportunities in respect of advancing sustainability in higher education, within the prevailing neoliberal context. It illustrates using examples how neoliberal and managerialist control mechanisms, which govern institutional, departmental and individual academic, as well as student behaviour, are working conversely to both drive and limit the sustainability education agenda. The case is made for further exploration of how ‘nudging’ and ‘steering’ mechanisms within English HE might provide further leverage for ESD developments in the near future, and the implications of this for sustainability educators.     

Self–Injury and Suicide: Practical Information for College Counselors

The relationship between self–injury (SI) and suicide is largely unclear. However, researchers have suggested that clients who self–injure are at a heightened risk of suicide (Chapman & Dixon–Gordon, 2007 ; Toprak, Cetin, Guven, Can, & Demircan, 2011 ). Thus, it is important that college counselors be knowledgeable about both SI and suicide. In this article, the authors provide an overview of SI and suicide, as well as practical information for college counselors.     

腹腔注射丁酸盐对大鼠乙酸性结肠炎的预防作用(英文)

目的:探索腹腔注射丁酸盐对防止乙酸性结肠炎的疗效。创新点:首次对大鼠进行腹腔注射丁酸盐,通过与直肠灌注和口服比较,探索三种不同给药方式对预防乙酸性结肠炎的疗效差异。方法:以40只Wistar大鼠为实验对象,分组进行连续7天的腹腔注射、直肠灌注和口服100 mg/kg丁酸钠(SB),第8天进行乙酸(AA)直肠灌注,48小时后处死。记录实验大鼠的临床症状,包括体重减少、腹泻、便血等。对结肠切片进行组织病理学观察,最后对试验数据进行统计分析。结论:腹腔注射、直肠灌注和口服丁酸盐均能明显缓解大鼠乙酸性结肠炎的炎症,其中以腹腔注射疗效最佳。     

Effects of treadmill versus overground soccer match simulations on biomechanical markers of anterior cruciate ligament injury risk in side cutting

This study aimed to investigate whether treadmill versus overground soccer match simulations have similar effects on knee joint mechanics during side cutting. Nineteen male recreational soccer players completed a 45-min treadmill and overground match simulation. Heart rate (HR) and rating of perceived exertion (RPE) were recorded every 5 min. Prior to exercise (time 0 min), at “half-time” (time 45 min) and 15 min post-exercise (time 60 min), participants performed five trials of 45° side-cutting manoeuvres. Knee abduction moments and knee extension angles were analysed using two-way repeated measures analysis of variance (α = 0.05). Physiological responses were significantly greater during the overground (HR 160 ± 7 beats ? min^?1; RPE 15 ± 2) than the treadmill simulation (HR 142 ± 5 beats ? min^?1; RPE 12 ± 2). Knee extension angles significantly increased over time and were more extended at time 60 min compared with time 0 min and time 45 min. No significant differences in knee abduction moments were observed. Although knee abduction moments were not altered over time during both simulations, passive rest during half-time induced changes in knee angles that may have implications for anterior cruciate ligament injury risk.     

Trauma‐Informed Response in the Age of Title IX: Considerations for College Counselors Working With Survivors of Power‐Based Personal Violence

Intimate partner violence, sexual violence, and stalking are pervasive in the United States, and college women are disproportionately affected by this power‐based personal violence (PBPV). Title IX mandates that colleges and universities offer support services to trauma survivors, and college counselors should be prepared to meet this need. Therefore, this article serves to explore a diverse assortment of trauma‐informed counseling techniques, based in feminist theory, for college counselors working with PBPV survivors.