How can clusters sustain performance? The role of network strength, network openness, and environmental uncertainty   总被引：2，自引：0，他引：2  

Andreas B. Eisingerich  Simon J. Bell  Paul Tracey 《Research Policy》2010,39(2):239-253

This paper draws on social network theory to develop a model of regional cluster performance. We suggest that high performing regional clusters are underpinned by (1) network strength and (2) network openness, but that the effects of these on the performance of a cluster as a whole are moderated by environmental uncertainty. Specifically, the positive effects of network openness on cluster performance tend to increase as environmental uncertainty increases, while the positive effects of network strength on cluster performance tend to decrease as environmental uncertainty increases. Our findings have theoretical and practical implications for social network research in general, and cluster research in particular.  相似文献   

Biochemical and genetic studies on cardiometabolic syndrome     

A. Supriya Simon  D. Dinesh Roy  V. Jayapal  T. Vijayakumar 《Indian journal of clinical biochemistry : IJCB》2010,25(2):164-168

Cardiometabolic syndrome is one of the major public health issues of this century which describes a cluster of clinical characteristics. Seventy two patients with coronary artery disease (CAD) and cardiometabolic syndrome and forty healthy age and sex matched normal controls were selected for this study. Detailed clinical epidemiological and anthropometric characteristics were noted. Lipid profile and Cytokinesis-block micronuclei (CBMN) assay using cytochalasin B were carried out in all the subjects. Serum total cholesterol, triglyceride and LDL-cholesterol was significantly higher and HDL cholesterol was significantly lower in patients compared to their normal counter-parts (P<0.05). CBMN frequency of the patients was significantly higher at all ages compared to their normal counter parts (P<0.05). Various risk factors like diabetes, hypertension, dyslipidemia, abdominal obesity, smoking and alcoholism were found influenced the CBMN frequency; but the changes were not significant. From this study it can be concluded that DNA damage was found to be higher in patients with cardiometabolic syndrome which may be attributed to the generation of free radicals associated with alcohol consumption, tobacco use, dyslipidemia and glucose intolerance and the accumulation of free radicals with increase in age.  相似文献   

The Effects of Late Arts Education on Adults with Early Visual Disabilities     

Simon Hayhoe 《Educational Research and Evaluation》2013,19(3):229-249

In this study, non-participant observations of visually disabled adult students in extra mural arts education are analysed through Walter Doyle’s theory of ambiguity and risk in classroom tasks. This study finds these students attempted to avoid activity, or re-negotiate lecturers’ expectations, when their performance became especially threatening to their self-esteem. Additionally, it was found that lecturers were often reluctant to push their students as soon as they realised this risk to them. These results appear to show a phenomenon similar to learned helplessness.  相似文献   

The relationship between torque and joint angle during knee extension in boys and men.     

V Marginson  R Eston 《Journal of sports sciences》2001,19(11):875-880

The length-tension relationship of muscle contraction is well documented in adults. However, research on this relationship in children has been limited. The aim of this study was to compare differences in the torque-joint angle relationship of the quadriceps muscle in children and adults. Eight boys aged 8-10 years and eight men aged 20-26 years performed two maximal voluntary isometric contractions at six knee joint angles (20 degrees, 40 degrees, 60 degrees, 80 degrees, 90 degrees, 100 degrees). The mean of the two trials was used as the performance measure. Both groups demonstrated an expected increase in relative torque as the joint angle increased (P< 0.05). The men produced significantly greater relative torque at 20 degrees, 40 degrees and 60 degrees knee flexion (P < 0.05). The percentage of maximal torque at these angles for the men and boys respectively were: 35.2+/-4.3 vs 15.2+/-12%, 63.6+/-9.1 vs 51.8+/-16.8% and 93.6+/-6.5 vs 84.4+/-14.4%. There were no group differences at 80 degrees or 90 degrees. Peak torque was attained at 80 degrees in men, but decreased significantly (P< 0.05) at 90 degrees and 100 degrees. For boys, peak torque was attained at joint angles of 80 degrees and 90 degrees. The reduction in peak torque at 100 degrees was not statistically significant, but the relative torque at this angle was lower in men than in boys (77.9+/-13.7 vs 87.1+/-10.4%; P< 0.05). In conclusion, the relationship between torque and joint angle appears to be affected by age.  相似文献   

The industrial lot and its sampling implications     

Leslie E. Simon 《Journal of The Franklin Institute》1944,237(5):359-370

It is shown that wrong inferences are drawn from samples because of failure to understand what constitutes a lot and because of failure to verify the existence of a lot in the practically useful sense. Time-tried methods of making valid inferences from samples without increased cost are pointed out.  相似文献   

Exploring the Causal Effect of Interpretation Bias on Attachment Expectations          下载免费PDF全文

Simon De Winter  Elske Salemink 《Child development》2017,88(1):131-140

Attachment theory implies that children's inclination to interpret attachment figures behavior as supportive and available causally influences children's trust in their attachment figure's availability. An experiment was conducted to test whether training children (8–12 years old) to interpret ambiguous interactions with their mothers in a more secure way increases their trust in their mother's availability. Participants (N = 49) were randomly assigned to either a secure condition to train children to interpret their mother's behavior as supportive or a neutral placebo condition, where interpretations were unrelated to maternal support. Results supported the hypothesis: After the secure training, children interpreted maternal behavior more securely and trusted more in her availability. This suggests that attachment‐related processing biases causally affect attachment expectations.  相似文献   

Vygotsky’s sociocultural theory in the context of globalization     

Simon Marginson  Thi Kim Anh Dang 《Asia Pacific Journal of Education》2017,37(1):116-129

The article reviews the social-educational theorization of the early Soviet psychologist L. S. Vygotsky (1896–1934) in the light of the impact of communicative globalization in educational practice. Vygotsky proposed four “genetic domains” for investigating higher cognitive processes: the phylogenetic (humans undergoing natural evolution), the cultural-historical (social activity of humans), the ontogenetic (individual lifespan), and the microgenetic (immediate events). Vygotskian sociocultural theory is widely used in educational research, especially Vygotsky’s notion of mediated development via tools and signs. Since Vygotsky, communicative globalization has transformed educational potentials. Nevertheless, provided adjustments are made to Vygotsky’s genetic method to incorporate time-space compression, the mutual presence of the genetic domains, and the glonacal heuristic, Vygotskian theory continues to be useful in socially-situated investigations of educational development and transformation, and opens another way into the global, for example investigation of the role of global mediation in learning.  相似文献   

Student & tutor consensus: a partnership in assessment for learning     

James Thompson  Don Houston  Kathryn Dansie  Timothy Rayner  Timothy Pointon  Simon Pope 《Assessment & Evaluation in Higher Education》2017,42(6):942-952

The mistakes made when attempting tasks often prove to be some of the most invaluable learning experiences. Despite this, outcome and results driven assessment formats largely penalise student performance errors or reward students who succeed by chance. The consequences of this paradigm are visible effects on student relationships with assessment. The student–tutor consensus approach to assessment was introduced to capture student learning achieved ‘from’ assessment to complement the measurement of performance outcomes. This approach parallels student and tutor judgement in a grade negotiation, affording the student an opportunity to share with their assessor what they have learned from the assessment activity. This student self-awareness was then considered alongside the conventional outcome-based score awarded by the tutor to generate a final grade for the assessed activity. Our study evaluated the perceptions of 90 undergraduate students enrolled in the bachelor of paramedic studies, who participated in this novel assessment approach as part of a final-year capstone topic. The results comprehensively indicated value for all aspects of the assessment approach, as well as a recognition that the skills will be useful in their future professional roles.  相似文献   

Learning through South–South development: Cuban-African partnerships in sport and physical education     

Simon C. Darnell  Robert Huish 《Compare》2017,47(2):286-299

Since the 1990s, Cuba has offered scholarships to students from low-resource countries to attend the Escuela Internacional de Educación Física y Deporte (EIEFD) for a six-year degree in sport, physical education, and coaching. Drawing on the experiences of EIEFD graduates from four Southern African countries (Zambia, South Africa, Mozambique, and Lesotho) the authors discuss the meanings that this South–South cooperation through education holds for international students and for the self-sufficiency of sport and physical-education systems within partner countries. The authors also show that upon returning home, many EIEFD graduates are left to negotiate insular job markets and inconsistent domestic commitments to public sport and physical education. The implications for South–South development through international education, and the place of sport and physical education therein, are discussed.  相似文献   

Reflections on the Academic Policy Analysis Process and the UK Identity Cards Scheme     

Edgar A. Whitley  Ian R. Hosein  Ian O. Angell  Simon Davies 《The Information Society》2007,23(1):51-58

There is an increasing rhetoric from politicians for universities to become more involved in policy analysis and policy research. In this article, we reflect on our experiences of the analysis we conducted into the legislation to introduce biometric identity cards in the United Kingdom. We highlight how our work had direct consequences for the ongoing policy deliberation around this controversial piece of legislation. In particular, we highlight our role in the debate surrounding the government's figures for identity fraud and the concerns about the likely cost of the scheme to the government and taxpayer. We end the article by discussing some of the practical realities of such a foray into real politik.  相似文献