Pioneer whiteness meets “multicultural” whiteness in farm communities in Washington state

Emphasizing symbolic/material intersections, I employ a spatial approach to contextualize whiteness in migrant farm communities in Washington state. Specifically, I argue that white identity is not detached from physical settings, but evolves in relationship to others in these concrete, but symbolically constructed, locations. Utilizing observations, interviews, and ethnographic mapping, I discuss how participants’ spatial narratives elucidate pioneer and “multicultural” expressions of whiteness. The citation of an agricultural ethos also pervades discourses of whiteness in this community. These specific articulations signal the resiliency of whiteness to morph in response to perceived threats to its position and assuage anxiety over demographic changes.     

Upper extremity kinematic trends of fly-casting: establishing the effects of line length

Fly-fishing is a popular form of recreation. Recent evidence has associated overhand fly-casting movements with upper extremity pain. However, little research exists on the motions and coordination common to fly-casting. The aim of this study was to establish upper extremity kinematic trends of fly-casting while casting greater line lengths. It was hypothesized that kinematic casting parameters would increase and time between peak angular velocities would decrease with greater line length. Eighteen males participated in the study. Three-dimensional motion capture was conducted to calculate shoulder, elbow, and wrist kinematics during casting conditions of 6.1, 12.2, 18.3, and 24.4 m of line. Multiple analyses of variance were used to assess the condition effect of line length on the kinematic variables (P = 0.05). Overall, total range of movement increased with increasing length of line cast. Peak angular velocity exhibited a proximal-to-distal trend: peak shoulder internal rotation followed by elbow extension, then wrist ulnar deviation. Time between peak shoulder and elbow angular velocities increased significantly as line length increased. Our findings indicate that specific changes in total range of movement accommodate the demands of casting greater lengths of line. Also, joint velocity coordination patterns of fly-casting appear to follow a proximal-to-distal pattern. These findings represent an initial foundation for connections between kinematics and upper extremity pain reported by fly-fisherman.     

苏州市全要素能源效率分析——基于面板数据的DEA分析

全要素能源效率指数是能源消费的目标值与实际值的比值.采用苏州市2000-2008年各个地区的面板数据,分析比较了2000-2008年苏州市各个地区的全要素能源效率.本文在构建DEA分析模型时,将能源、人力资本、固定资本投入、土地资源等作为多元投入,工业增加值作为产出,这克服了传统能源效率指标仅以能源作为单一投入的缺点.通过对结果的分析,发现张家港、昆山、常熟和吴江的全要素能源效率始终处于较高水平,而市区与太仓的全要素能源效率相对较低.     

Asymmetric Missing-data Problems: Overcoming the Lack of Negative Data in Preference Ranking

In certain classification problems there is a strong a asymmetry between the number of labeled examples available for each of the classes involved. In an extreme case, there may be a complete lack of labeled data for one of the classes while, at the same time, there are adequate labeled examples for the others, accompanied by a large body of unlabeled data. Since most classification algorithms require some information about all classes involved, label estimation for the un-represented class is desired. An important representative of this group of problems is that of user interest/preference modeling where there may be a large number of examples of what the user likes with essentially no counterexamples.Recently, there has been much interest in applying the EM algorithm to incomplete data problems in the area of text retrieval and categorization. We adapt this approach to the asymmetric case of modeling user interests in news articles, where only labeled positive training data are available, with access to a large corpus of unlabeled documents. User modeling is here equivalent to that of user-specific document ranking. EM is used in conjunction with the Naive Bayes model while its output is also utilized by a Support Vector Machine and Rocchio's technique.Our findings demonstrate that the EM algorithm can be quite effective in modeling the negative class under a number of different initialization schemes. Although primarily just the negative training examples are needed, a natural question is whether using all of the estimated labels (i.e., positive and negative) would be more (or less) beneficial. This is important considering that, in this context, the initialization of the negative class for EM is likely not to be very accurate. Experimental results suggest that EM output should be limited to negative label estimates only.     

Digital chat reference in health science libraries: challenges in initiating a new service

Digital reference service adds a valuable new dimension to health science reference services, but the road to implementation can present questions that require carefully considered decisions. This article incorporates suggestions from the published literature, provides tips from interviews with practicing academic health science librarians, and reports on data from students' exploration of academic health science library Web sites' digital reference services. The goal of this study is to provide guidelines to plan new services, assess user needs, and select software, and to showcase potential benefits of collaboration and proactive and user-friendly marketing. In addition, tips for successful operation and evaluation of services are discussed.     

Chaos: exploring an engaging online model for rapid application during the pandemic

Educational technology research and development - This paper is in response to the article entitled “A design framework for enhancing engagement in student-centered learning: own it, learn...     

高校图书馆微信服务现状分析及发展对策——基于“985工程”大学图书馆的调研

本文以腾讯微信公众账号为研究对象,对"985工程"大学图书馆官方微信服务的账号类型、推广方式、认证方式、运营模式、推送内容等进行调研,分析了目前官方微信存在的问题,并提出了高校图书馆官方微信的发展对策和建议。     

Neural Correlates of Self and Its Interaction With Memory in Healthy Adolescents

Adolescence is marked by the development of personal identity and is associated with structural and functional changes in brain regions associated with Self processing. Yet, little is known about the neural correlates of self‐reference processing and self‐reference effect in adolescents. This functional magnetic resonance imaging study consists of a self‐reference paradigm followed by a recognition test proposed to 30 healthy adolescents aged 13–18 years old. Results showed that the rostral anterior cingulate cortex is specifically involved in self‐reference processing and that this specialization develops gradually from 13 to 18 years old. The self‐reference effect is associated with increased brain activation changes during encoding, suggesting that the beneficial effect of Self on memory may occur at encoding of self‐referential information, rather than at retrieval.