Perfecting Aristotle     

Alisha Rankin 《Metascience》2005,14(2):289-292

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Fresh Light On Criminology’s Early History     

Neil Davie 《Metascience》2007,16(2):257-260

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ＭeＳＨＡ主题词选设与文献量相关度剖析   总被引：1，自引：0，他引：1  

曹锦丹  李欣欣 《情报科学》2001,19(2):120-122

本文调查分析了《医学主题词表 》的变化机制以及主题词选设与文献量之间的相互关系，旨在进一步把握ＭeＳＨ的变化特点，提高医学主题词医学文献检索与标引中的使用效果。结果表明：其一，有两方面的因素影响着ＭeＳＨ词表总量的变化；其二，不同的新增主题词在设立之前所汇集的文献量和文献中出现的频率存在着极大差异。  相似文献   

The Sexual Politics of Neurons     

Pablo Schyfter 《Metascience》2007,16(2):349-353

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基于新能源汽车的专利合作网络演化研究          下载免费PDF全文

曹霞  李传云  林超然 《科研管理》2019,40(8):179-188

以新能源汽车为研究对象,通过挖掘相关专利合作数据,绘制新能源汽车的专利合作网络,运用社会网络分析方法,基于时间和空间两个维度,剖析在1989-2015年间,新能源汽车专利合作网络的网络结构以及空间分布的演化规律。研究结果表明,新能源汽车的专利合作网络演化呈现明显的阶段特征,自2010年开始,网络规模呈现爆发式增长,网络朝着更为连通的方向演化发展;在不同的演化阶段,网络结构演化存在较大差异,核心组织地位日益突显,网络呈现多元化合作发展,不同类型组织间的专利合作日趋显著;区域内和区域间的专利合作方式呈现不同的空间演化规律,区域边界对于广西、黑龙江、甘肃以及海南等地的跨区域合作存在较大影响,北京、江苏以及浙江等地在跨区域合作中处于明显优势地位。  相似文献   

我国非营利组织的绩效考核指标体系设计研究   总被引：9，自引：0，他引：9       下载免费PDF全文

仲伟周  曹永利  Shunfeng SONG 《科研管理》2006,27(3):116-122,74

本文通过绩效指标考核体系性质与功能的充分描述,揭示了我国非营利组织建立绩效考核指标体系的客观必然性;本文在针对当前我国非营利组织绩效体系存在的缺乏统一标准和非经济量化指标等问题及其根源深刻考察的基础上,分析了我国非营利组织建立有效绩效指标体系应以合理实用为主要目标、以客观科学为基本原则;并通过对非营利组织与一般企业绩效指标体系构建的相互比较,提出我国非营利组织绩效指标体系设计应包含的组织内部员工态度、能力与业绩等基本内容,以及完善指标体系的相关政策建议。  相似文献   

中国对虾某些免疫指标的测定及免疫预防初步研究   总被引：8，自引：0，他引：8  

沈锦玉  钱冬  尹文林  曹铮  陈月英  沈智华  张念慈 《科技通报》1997,(5)

通过口服免疫药物后，对虾血清中溶菌酶、酚氧化酶（ＰＯ）活力及免疫保护率测定，来作为衡量对虾免疫状态的指标，并用弧菌疫苗浸泡法及口服免疫药物，提高虾体自身免疫能力，增强疾病抵抗力．  相似文献   

Biological and Biochemical Potential of Sea Snake Venom and Characterization of Phospholipase A<Subscript>2</Subscript> and Anticoagulation Activity     

Palani Damotharan  Anguchamy Veeruraj  Muthuvel Arumugam  Thangavel Balasubramanian 《Indian journal of clinical biochemistry : IJCB》2016,31(1):57-67

This study is designed to isolate and purify a novel anti-clotting protein component from the venom of Enhydrina schistosa, and explore its biochemical and biological activities. The active protein was purified from the venom of E. schistosa by ion-exchange chromatography using DEAE-cellulose. The venom protein was tested by various parameters such as, proteolytic, haemolytic, phospholipase and anti-coagulant activities. 80 % purity was obtained in the final stage of purification and the purity level of venom was revealed as a single protein band of about 44 kDa in SDS-polyacrylamide electrophoresis under reducing conditions. The results showed that the Potent hemolytic activity was observed against cow, goat, chicken and human (A, B and O positive) erythrocytes. Furthermore, the clotting assays showed that the venom of E. schistosa significantly prolonged in activated partial thromboplastin time, thrombin time, and prothrombin time. Venomous enzymes which hydrolyzed casein and gelatin substrate were found in this venom protein. Gelatinolytic activity was optimal at pH 5–9 and ¹H NMR analysis of purified venom was the base line information for the structural determination. These results suggested that the E. schistosa venom holds good promise for the development of novel lead compounds for pharmacological applications in near future.  相似文献   

Influence of intellectual capital upon knowledge creation in Spanish subsidiaries: an empirical study     

Patrocinio Zaragoza-Sáez  Enrique Claver-Cortés  Bartolomé Marco-Lajara  Mercedes Úbeda-García 《知识管理研究与实践》2016,14(4):489-501

Knowledge creation is one of the most important dynamic capabilities that firms can use to develop new assets, which can represent the basis for future innovations. Within a context of growing globalisation, the acquisition and creation of knowledge is one of the main objectives sought with international expansion. The consideration of intellectual capital within the knowledge creation process in subsidiaries offers an innovative way to undertake knowledge management practices in multinationals. Theoretical and empirical works can be found in the literature about intellectual capital. However, very few studies link intellectual capital to knowledge creation in multinationals. Seeking to fill this gap, the purpose of this paper is to develop and test a model that includes the main intangibles belonging to structural and relational capital that can influence knowledge creation in Spanish subsidiaries of foreign multinational firms belonging to high-technology and knowledge-intensive sectors. Theoretical, empirical and managerial contributions result from this paper.  相似文献   

Are preservice teachers prepared to teach struggling readers?   总被引：1，自引：0，他引：1  

Erin K. Washburn  R. Malatesha Joshi  Emily Binks Cantrell 《Annals of dyslexia》2011,61(1):21-43

Reading disabilities such as dyslexia, a specific learning disability that affects an individual’s ability to process written language, are estimated to affect 15–20% of the general population. Consequently, elementary school teachers encounter students who struggle with inaccurate or slow reading, poor spelling, poor writing, and other language processing difficulties. However, recent evidence may suggest that teacher preparation programs are not providing preservice teachers with information about basic language constructs and other components related to scientifically based reading instruction. As a consequence preservice teachers have not exhibited explicit knowledge of such concepts in previous studies. Few studies have sought to assess preservice teachers’ knowledge about dyslexia in conjunction with knowledge of basic language concepts. The purpose of the present study was to examine elementary school preservice teachers’ knowledge of basic language constructs and their perceptions and knowledge about dyslexia. Findings from the present study suggest that preservice teachers, on average, are able to display implicit skills related to certain basic language constructs (i.e., syllable counting), but fail to demonstrate explicit knowledge of others (i.e., phonics principles). Also, preservice teachers seem to hold the common misconception that dyslexia is a visual perception deficit rather than a problem with phonological processing. Implications for future research as well as teacher preparation are discussed.  相似文献