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71.
The relational antecedents of project-entrepreneurship: Network centrality, team composition and project performance 总被引:1,自引:0,他引:1
The relational antecedents of project-based enterprises have not yet received systematic investigation. These ventures are typically created by individual freelancers who are usually embedded in networks of collaborative relationships that convey the information and resources required to carry out new projects. Using a relational perspective of entrepreneurial discovery and team composition, we analyze the performance determinants of project-entrepreneurs, namely the individuals who are responsible for launching and carrying out those projects. We argue that project-entrepreneurs’ performance is related to their degree of centrality within the social network, and their familiarity with the selected project-team as captured by the distribution of ties among team members. We test our hypotheses within the Hollywood Film Industry over the period 1992–2003. The findings point to the existence of diminishing returns to centrality and performance benefits from assembling teams that combine old-timers and newcomers. The theoretical contributions and implications of the study are discussed. 相似文献
72.
The authors examined the short- and long-term effects of high school exit exams (HSEEs) on graduation rates and achievement using an interrupted time series approach. There is a positive overall effect of HSEE introduction for graduation rate trends, which is heterogeneous over time. HSEEs have a negative impact on graduation rates in the year of introduction and briefly after, which is short lived and becomes positive (but not statistically significant) over the long term. There is also a preintervention negative effect, suggesting that high schools prepare for the HSEE before introduction. There are no effects for achievement, possibly due to the lack of meaningful cross-state achievement data. The findings are robust to the inclusion of states that do not have HSEEs as a control group and also robust to controlling for No Child Left Behind introduction. 相似文献
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74.
Elissa Burton Gill Lewin Simone Pettigrew Anne-Marie Hill Liz Bainbridge Kaela Farrier 《Journal of sports sciences》2017,35(15):1523-1532
Participation rates of older people in resistance training (RT) are low despite increasing research showing many health benefits. To increase the number of older people participating in RT it is important to know what would motivate people to become involved, what motivates those who participate to continue, and the factors preventing many older people from commencing participation. To investigate these issues, a questionnaire was mailed to three groups of older people: (1) those receiving home care services, (2) members of a peak non-government seniors’ organisation and (3) those participating in a specific gym-based RT programme. In total, 1327 questionnaires were returned (response rate = 42.5%). To feel good physically and mentally were the main reasons motivating participation among all three groups, and falls prevention was identified as an important motivator for the home care respondents. Pain, injury and illness were the main barriers to participating, or continuing to participate. However, medical advice was a factor influencing participation commencement. The results suggest organisations providing RT programmes for older people should tailor the promotion and delivery of programmes to address key motivators and barriers specific to each group to increase the proportion of older people initiating and continuing to engage in RT. 相似文献
75.
Antonio Buo Soto Katell Peoch Tommaso Fasano Jorge Diaz-Garzon Bernardino Gonzlez de la Presa Valerie Chicha-Cattoir Simone Canovi Maria Sanz de Pedro Nayra Rico Tiphaine Robert Efrem Bonelli Pilar Fernndez Calle Aurea Mira Guillaume Lefevre Luigi Vecchia Jose Luis Bedini 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2022,32(2)
IntroductionThe Fourth Universal Definition of Myocardial Infarction Global Taskforce recommends the use of high sensitive troponin (hs-Tn) assays in the diagnosis of acute myocardial infarction. We evaluated the analytical performance of the Atellica IM High-sensitivity Troponin I Assay (hs-TnI) (Siemens Healthcare Diagnostics Inc., Tarrytown, USA) and compared its performance to other hs-TnI assays (Siemens Advia Centaur, Dimension Vista, Dimension EXL, and Abbott Architect (Wiesbaden, Germany)) at one or more sites across Europe.Materials and methodsPrecision, detection limit, linearity, method comparison, and interference studies were performed according to Clinical and Laboratory Standards Institute protocols. Values in 40 healthy individuals were compared to the manufacturer’s cut-offs. Sample turnaround time (TAT) was examined.ResultsImprecision repeatability CVs were 1.1–4.7% and within-lab imprecision were 1.8–7.6% (10.0–25,000 ng/L). The limit of blank (LoB), detection (LoD), and quantitation (LoQ) aligned with the manufacturer’s values of 0.5 ng/L, 1.6 ng/L, and 2.5 ng/L, respectively. Passing-Bablok regression demonstrated good correlations between Atellica IM analyser with other systems; some minor deviations were observed. All results in healthy volunteers fell below the 99th percentile URL, and greater than 50% of each sex demonstrated values above the LoD. No interference was observed for biotin (≤ 1500 µg/L), but a slight bias at 5.0 g/L haemoglobin and 50 ng/L Tn was observed. TAT from was fast (mean time = 10.9 minutes) and reproducible (6%CV).ConclusionsReal-world analytical and TAT performance of the hs-TnI assay on the Atellica IM analyser make this assay fit for routine use in clinical laboratories. 相似文献
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77.
Simone Thornton 《Educational Philosophy and Theory》2019,51(6):608-618
The struggle to become lucid is at the heart of The Myth of Sisyphus. To understand the absurd is to understand that the fit between our conception of the world and the world itself is fraught with uncertainty; lucidity is the elucidation of the absurd. To be lucid is to revolt against the type of certainty that leads to suffering; to revolt against philosophical suicide. Camus teaches us the intellectual humility that stays hands; there is no reasoning that justifies suffering. If it is granted that the ability to recognise and respond to our own and others suffering is an important part of being human, and the task of education is to develop humans, then lucidity, in so far as it holds promise for the development of such an ability, has the potential to contribute positively to education. 相似文献
78.
Suprawati Maria N. Volet Simone Pino-Pasternak Deborah 《Asia Pacific Education Review》2020,21(2):325-338
Asia Pacific Education Review - This study examined the nature of effort towards challenge in stories recommended for young children in Indonesian schools. One hundred and nine stories with... 相似文献
79.
Dipl.-Päd. Marcus Pietsch Dr. Simone Tosana 《Zeitschrift für Erziehungswissenschaft》2008,11(3):430-452
In the external evaluation of schools the technique of classroom observation belongs to the methodological standard repertoire. Nevertheless the measurement of quality of classroom teaching based upon selected lesson sequences, which are as a rule inspected only briefly, is fraught with a lot of methodological problems. Therefore it is relevant for a substantiated quality assurance to reveal problems in the measurement of quality of classroom teaching due to an implementation of adequate empirical methods. This is made possible by using the generalizability theory and the many-facet Rasch model. Analyses based upon data of the Hamburg school inspection point out that by using an appropriate data collection procedure rater effects in classroom observations turn out comparatively low at about nine percent of total variance. Furthermore analyses prove that it is insufficient to simply quantify the agreement among raters by using global reliability measures, but that it is necessary to check up on intra rater consistency for getting valid and in this way reliable results from classroom observations for the practice. 相似文献
80.
Simone Herrlinger Tim N. Höffler Maria Opfermann Detlev Leutner 《Research in Science Education》2017,47(3):685-704
Adding pictures to a text is very common in today’s education and might be especially beneficial for elementary school children, whose abilities to read and understand pure text have not yet been fully developed. Our study examined whether adding pictures supports learning of a biology text in fourth grade and whether the text modality (spoken or written) plays a role. Results indicate that overall, pictures enhanced learning but that the text should be spoken rather than written. These results are in line with instructional design principles derived from common multimedia learning theories. In addition, for elementary school children, it might be advisable to read texts out to the children. Reading by themselves and looking at pictures might overload children’s cognitive capacities and especially their visual channel. In this case, text and pictures would not be integrated into one coherent mental model, and effective learning would not take place. 相似文献