排序方式： 共有49条查询结果，搜索用时 234 毫秒
1.
Internationalization of scientific publishing over time: Analysing publishers and fields differences 
下载免费PDF全文
下载免费PDF全文 The changes in journal internationality in mainstream science were examined using 1,398 journals and 2,557,229 papers during 1991–2014. The authors’ country of affiliation in journals’ papers and references of multinational and national publishers were analysed. The results showed that journals’ papers and references have become more globalized over time. On average, older journals are more international than the newer ones. Although multinational publishers publish more international journals than the national ones do, journals from national publishers have internationalized faster than those from multinationals. The difference between these two groups of publishers is much greater in authoring compared to referencing. For both groups of publishers, the most changes in journal internationality occurred between the fourth and sixth year of indexing in Web of Science. Journals and papers in Humanities journals have the highest rate of increase of internationality although Natural Sciences and Engineering and Technology have the most international papers. Agricultural Sciences has the least international papers; however, these papers cite a wider range of countries’ papers compared to other fields. Journals in Medical and Health Sciences, Natural Sciences, and Agricultural Sciences have the most international references. 相似文献
2.
Tiwari AK Mahdi AA Zahra F Chandyan S Srivastava VK Negi MP 《Indian journal of clinical biochemistry : IJCB》2010,25(4):411-418
The present study was conducted to investigate the oxidant–antioxidant status in iron deficient pregnant anemic women. One
hundred thirty pregnant women with iron deficiency anemia (IDA) were divided into three groups, namely mild (50), moderate
(50) and severe (30) anemic along with pregnant healthy women as controls (50). The complete blood count, plasma lipid peroxidation
products, enzymatic and non-enzymatic antioxidants were measured according to respective protocols. The levels of complete
blood count, iron, ferritin along with antioxidant enzymes namely catalase, superoxide dismutase, glutathione peroxidase,
glutathione reductase and reduced glutathione were significantly reduced in all IDA groups. However, the level of oxidized
glutathione, lipid peroxides, protein carbonyls, conjugated dienes were found significantly increased in all anemic patients.
Antioxidant vitamins, namely C, E and A were also found significantly decreased in IDA patients. On the basis of our results,
it may be concluded that IDA tends to increase the pro-oxidant components, which may result in various complications including
peroxidation of vital body molecules resulting in increased risk for pregnant women as well as fetus. 相似文献
3.
Education and Information Technologies - Education accountability and its building components has been the focal point and yet a convoluted issue. The current study aims to give a comprehensive... 相似文献
4.
Daniel A. Wagner Nathan M. Castillo Katie M. Murphy Molly Crofton Fatima Tuz Zahra 《Prospects》2014,44(1):119-132
In recent years, the advent of low-cost digital and mobile devices has led to a strong expansion of social interventions, including those that try to improve student learning and literacy outcomes. Many of these are focused on improving reading in low-income countries, and particularly among the most disadvantaged. Some of these early efforts have been called successful, but little credible evidence exists for those claims. Drawing on a robust sample of projects in the domain of mobiles for literacy, this article introduces a design solution framework that combines intervention purposes with devices, end users, and local contexts. In combination with a suggested set of purpose-driven methods for monitoring and evaluation, this new framework provides useful parameters for measuring effectiveness in the domain of mobiles for literacy. 相似文献
5.
Over the past decade, companies worldwide have used corporate venturing (CV) as a means of revitalizing their operations, building new capabilities, and achieving strategic renewal, creating value for shareholders. Business interest in CV has stimulated academic interest in the topic, resulting in a rapidly growing but fragmented body of literature. Despite the growing international scholarly interest in CV, researchers have devoted little effort to integrating prior findings in a cumulative fashion. As a result, studies do not build upon one another, making it difficult to gauge the progress being made in addressing the fundamental research questions related to CV. In this paper, we examine the literature on CV seeking to synthesize, integrate and link its key findings. To do so, we analyze this literature over the past decade to identify its major themes and research findings setting the stage for greater coherence in future research on CV. We give special attention to the challenges and rewards of theory building in future CV research. Our review clearly shows that CV is an area of scholarly inquiry that has important implications for managerial practice. 相似文献
6.
While there is a growing body of work that examines disciplinary identity development, unlike qualitative work in this area, quantitative research has not fully incorporated the importance of different contexts, nor has it uniquely focused on underrepresented groups (in this case, women in physics). This study examines how the constructs posited by prior work as important for physics identity, as well as an additional theorized construct, may interrelate and affect female students' physics identity differently depending on the context. Context in this study refers to two different experiential levels in college. The constructs examined include performance/competence, recognition, and interest, as well as sense of belonging. In particular, we used structural equation modeling to examine the effect that these constructs have on the physics identity of two groups of female physics undergraduates: first year students and senior year students. The results reveal that the relationship of the theorized constructs with physics identity vary between the two groups as well as compared to prior research with broad college student populations (not just physics majors). Unlike broad college student populations, for our sample of female physics undergraduates, interest did not have a direct effect on physics identity while sense of belonging was significant only for senior year students. These results exemplify the importance of examining context or different types of student experiences when studying disciplinary identity development rather than generalizing previous frameworks to all contexts. 相似文献
7.
The need for cell and particle sorting in human health care and biotechnology applications is undeniable. Inertial microfluidics has proven to be an effective cell and particle sorting technology in many of these applications. Still, only a limited understanding of the underlying physics of particle migration is currently available due to the complex inertial and impact forces arising from particle–particle and particle–wall interactions. Thus, even though it would likely enable significant advances in the field, very few studies have tried to simulate particle-laden flows in inertial microfluidic devices. To address this, this study proposes new codes (solved in OpenFOAM software) that capture all the salient inertial forces, including the four-way coupling between the conveying fluid and the suspended particles traveling a spiral microchannel. Additionally, these simulations are relatively (computationally) inexpensive since the arbitrary Lagrangian–Eulerian formulation allows the fluid elements to be much larger than the particles. In this study, simulations were conducted for two different spiral microchannel cross sections (e.g., rectangular and trapezoidal) for comparison against previously published experimental results. The results indicate good agreement with experiments in terms of (monodisperse) particle focusing positions, and the codes can readily be extended to simulate two different particle types. This new numerical approach is significant because it opens the door to rapid geometric and flow rate optimization in order to improve the efficiency and purity of cell and particle sorting in biotechnology applications. 相似文献
8.
Daniel Zahra Iain Robinson Martin Roberts Lee Coombes Josephine Cockerill 《Assessment & Evaluation in Higher Education》2017,42(7):1159-1167
Processes for moderating assessments are much debated in higher education. The myriad approaches to the task vary in their demands on staff time and expertise, and also in how valid, reliable and fair to students they appear. Medical education, with its diverse range of assessments and assessors across clinical and academic domains presents additional challenges to moderation. The current review focuses on medical education, considering double-marking and benchmarking as two broad classes of moderation procedure, and argues that it is the process more than the type of procedure which is crucial for successful moderation. The advantages and disadvantages of each class of procedure are discussed in the light of our medical school’s current practices, and with respect to the limited empirical evidence within medical education assessment. Consideration of implementation is central to ensuring valid and reliable moderation. The reliability of assessor judgements depends more on the consistency of assessment formats and the application of clear and agreed assessment criteria than on the moderation process itself. This article considers these factors in relation to their impact on the reliability of moderation, and aims to help assessors and students appreciate the diversity of these factors by facilitating their consideration in the assessment process. 相似文献
9.
Connecting high school physics experiences,outcome expectations,physics identity,and physics career choice: A gender study 总被引：1，自引：1，他引：0
This study explores how students' physics identities are shaped by their experiences in high school physics classes and by their career outcome expectations. The theoretical framework focuses on physics identity and includes the dimensions of student performance, competence, recognition by others, and interest. Drawing data from the Persistence Research in Science and Engineering (PRiSE) project, which surveyed college English students nationally about their backgrounds, high school science experiences, and science attitudes, the study uses multiple regression to examine the responses of 3,829 students from 34 randomly selected US colleges/universities. Confirming the salience of the identity dimension for young persons' occupational plans, the measure for students' physics identity used in this study was found to strongly predict their intended choice of a physics career. Physics identity, in turn, was found to correlate positively with a desire for an intrinsically fulfilling career and negatively with a desire for personal/family time and opportunities to work with others. Physics identity was also positively predicted by several high school physics characteristics/experiences such as a focus on conceptual understanding, real‐world/contextual connections, students answering questions or making comments, students teaching classmates, and having an encouraging teacher. Even though equally beneficial for both genders, females reported experiencing a conceptual focus and real‐world/contextual connections less frequently. The explicit discussion of under‐representation of women in science was positively related to physics identity for female students but had no impact for male students. Surprisingly, several experiences that were hypothesized to be important for females' physics identity were found to be non‐significant including having female scientist guest speakers, discussion of women scientists' work, and the frequency of group work. This study exemplifies a useful theoretical framework based on identity, which can be employed to further examine persistence in science, and illustrates possible avenues for change in high school physics teaching. © 2010 Wiley Periodicals, Inc. J Res Sci Teach 47: 978–1003, 2010 相似文献
10.
Katie A. Ports Antoinette Ayers Wayne Crocker Alton Hart Maghboeba Mosavel Carlin Rafie 《Journal of the Medical Library Association》2015,103(1):35-39
The purpose of this study was to understand factors that may affect the usage of a consumer health center located in a public library. More specifically, the authors wanted to know what health resources are of interest to the community, what patrons'' perceptions of their experience at the center are, and finally, how staff can increase utilization of the center. In general, perceptions of the center were positive. The findings support that participants appreciate efforts to provide health information in the public library setting and that utilization could be improved through marketing and outreach.Problems with health literacy—one''s ability to obtain, process, and understand basic information and services needed to make appropriate health decisions 1, 2—significantly limit effective dissemination and understanding of relevant health information, especially among racial and ethnic minorities where health literacy challenges are pervasive 3–5. People with limited health literacy skills have higher medical costs and use an inefficient mix of medical services 3, 6–13. This compromises their health and is a major source of economic inefficiency in the US health care system. Efforts to address low health literacy may result in reductions of health inequities, decreased medical costs, and enhanced quality of life 14. However, efforts to promote health literacy that seek to empower individuals to understand health information and act in their own interest remain an underexplored pathway to improved health outcomes 9.The National Network of Libraries of Medicine (NN/LM) encourages libraries to reach out to low literacy groups in their surrounding communities to address literacy challenges 15–17. These actions have resulted in development of consumer health libraries, centers where patrons can get accurate and timely health information. Preliminary investigations of consumer health libraries have reinforced the value of these services 18, 19, but there is little information regarding the provision of similar services in other public settings.The Healthy Living and Learning Center (HLLC), located in a public library in Petersburg, Virginia, was established in 2012 to provide one-on-one assistance in accessing health information and community resources. According to 2010–2013 census data, 25% of Petersburg residents are below the poverty line 20. Localities surrounding the HLLC experience some of the most unfavorable health outcomes in Virginia 21. In addition, 16%–24% of citizens in the surrounding localities are illiterate 22.The public library setting provides an appropriate context to initiate consumer health centers outside of medical settings. Librarians are already being asked to meet consumer demands for health information 15–17, and the provision of accurate health information is a natural extension of the services that public libraries provide. The American Library Association reports that 62% of libraries report that they are the only source of free public access to computers and the Internet in their communities 23. According to a recent study from Pew, 35% of Americans 16 and older say they have used free Internet access points, 47% of whom have used these services to get health information 24. For a number of minorities, the public library is the only place they have Internet access 25. Thus, libraries not only remain a critical resource among the public, but may also have unique access to populations who are more vulnerable to health inequities. 相似文献