What drives scientists to start their own company?: An empirical investigation of Max Planck Society scientists

Studies on academic spin-off companies have shown that the researchers’ scientific potential, experience and established networks with other scientists or companies affect entrepreneurial activity. Most studies investigate official data such as patents and citations or qualitatively study a research group or spin-off formation. Only a few studies focus on the individual scientist. Our study fills this gap by analyzing survey interviews of 2604 scientists working for the Max Planck Society in Germany. Our empirical results indicate that the entrepreneurial activities of scientists heavily depend on patenting activity, entrepreneurial experience, and personal opinions about the benefits of commercializing research and close personal ties to industry.     

Privacy threat model for data portability in social network applications

The advent of the participatory Web and social network applications has changed our communication behaviour and the way we express ourselves on the Web. Social network application providers benefit from the increasing amount of personally identifiable information willingly displayed on their sites but, at the same time, risks of data misuse threaten the information privacy of individual users as well as the providers’ business model. From recent research, this paper reports the major requirements for developing privacy-preserving social network applications and proposes a privacy threat model that can be used to enhance the information privacy in data or social network portability initiatives by determining the issues at stake related to the processing of personally identifiable information.     

Short-term slackline training improves task-specific but not general balance in female handball players

Slackline training has been shown to improve balance and neuromuscular performance. However, recent studies suggested that balance is task-specific, implying that transferability of balance skills is limited and might depend on the similarity of the tasks. This study therefore investigated if short-term slackline training could improve performance in balance tasks that are either more or less similar to the trained slackline task. Furthermore, we assessed potential transfer effects to other neuromuscular performance tests.

25 female handball players (23.7?±?3.9 years) participated in our study and were matched to either a slackline training (SLT; n?=?14) or a control group (CON; n?=?11). The intervention comprised 12 sessions with overall 120 minutes of slackline training using single and double slacklines. Slackline standing time and measures of dynamic and static balance were assessed before and after the intervention, as well as power and sprint-related performance parameters.

Two-way repeated-measures ANOVA found a significant group?×?time interaction for slackline standing time, indicating larger training effects for SLT. For the remaining dynamic and static balance tests, no significant interactions were found. With regard to neuromuscular performance, there was a significant group?×?time interaction only in change of direction.

In essence, the study showed that slackline training induced task-specific balance improvements without affecting general balance. This adds further evidence to the task-specificity principle of balance, although the specificity of the sample as well as the briefness of the intervention should be taken into account when generalizing our findings. Nonetheless, this study contains practical implications for team sports interventions and future balance training studies, highlighting the importance of selecting appropriate balance exercises to yield rapid and the desired training outcomes.     

Searching for Macro-Meso-Micro-Level Links in Studies of North-South Research Collaborations

Minerva - Scientific collaboration between Northern and Southern researchers and development programs for research capacity-building have received new attention of practitioners and scholars during...     

Exercise interventions for older adults: A systematic review of meta-analyses

Background:The evidence concerning which physical exercise characteristics are most effective for older adults is fragmented.We aimed to characterize the extent of this diversity and inconsistency and identify future directions for research by undertaking a systematic review of metaanalyses of exercise interventions in older adults.Methods:We searched the Cochrane Database of Systematic Reviews,PsycInfo,MEDLINE,Embase,CINAHL,AMED,SPORTDiscus,and Web of Science for articles that met the following criteria:(1)meta-analyses that synthesized measures of improvement(e.g.,effect sizes)on any outcome identified in studies of exercise interventions;(2)participants in the studies meta-analyzed were adults aged 65+or had a mean age of 70+;(3)meta-analyses that included studies of any type of exercise,including its duration,frequency,intensity,and mode of delivery;(4)interventions that included multiple components(e.g.,exercise and cognitive stimulation),with effect sizes that were computed separately for the exercise component;and(5)meta-analyses that were published in any year or language.The characteristics of the reviews,of the interventions,and of the parameters improved through exercise were reported through narrative synthesis.Identification of the interventions linked to the largest improvements was carried out by identifying the highest values for improvement recorded across the reviews.The study included 56 meta-analyses that were heterogeneous in relation to population,sample size,settings,outcomes,and intervention characteristics.Results:The largest effect sizes for improvement were found for resistance training,meditative movement interventions,and exercise-based active videogames.Conclusion:The review identified important gaps in research,including a lack of studies investigating the benefits of group interventions,the characteristics of professionals delivering the interventions associated with better outcomes,and the impact of motivational strategies and of significant others(e.g.,carers)on intervention delivery and outcomes.     

From visuo-motor interactions to imitation learning: behavioural and brain imaging studies

We review three areas of research and theory relating to the involvement of motor processing in action observation: behavioural studies on imitation learning, behavioural work on short-term visuomotor interactions, and related neurophysiological and neuroimaging work. A large number of behavioural studies now indicate bi-directional links between perception and action: visual processing can automatically induce related motor processes, and motor actions can direct future visual processing. The related concept of direct matching (Rizzolatti et al., 2001) does not, however, imply that observed actions are transduced into a corresponding motor representation that would guarantee an instant and accurate imitation. Rather, studies on the mirror neuron system indicate that action observation engages the observer's own motor prototype of the observed action. This allows for enhanced action recognition, imitation recognition, and, predominantly in humans, imitation and observational learning. Despite the clear impact of action observation on motor representations, recent neuroimaging work also indicates the overlap of imitation learning with processes of non-imitative skill acquisition.     

层次图(混合Horn)公式的部分极大可满足性

本文为解决一类混合Horn公式([13,14]),又称为层次图公式([15])的MAXSAT问题进行了基于随机局部搜索过程的经验研究.具体地,我们首先在随机CNF公式的MAX2SAT及MAX3SAT问题上进行WalkSAT和Tabu-Sat(及其变种)的比较,其次,我们在层次图公式上比较了上述过程的改进版本,这些公式编码了随机生成层次图的最小化跨边问题.本文所引入的Tabu-Sat过程,当在搜索空间中检测到一个圈的时候,动态地改变Tabu长度参数.另一个被称为Vector-Tabu-Sat的过程,对所有的布尔变元进行独立的Tabu长度参数管理.一些数值实验的结果显示,我们改进的Tabu-Sat变种在子句个数增长的时候优于Walksat.     

Die 1960er Jahre als Formationsphase von modernem Doping und Anti-Doping

Many contemporary forms of doping and anti-doping developed in the 1960s regarding substances, social perception, doping and anti-doping strategies and actors. The first significant steps towards regulation were made during this period. Anti-doping in West Germany was based on the principle of partnership between sport and state. However, it was not a specifically German solution but in line with the common anti-doping strategies of most other European countries. At the same time limits and obstacles of anti-doping became apparent.