Technologiebasierte Spin-offs ?C Ein Forschungs??berblick zu Einflussgr??en ihrer Entwicklung

Technology-based spin-offs from academic institutions and private corporations represent an important proportion of young innovation-oriented ventures. They encounter specific starting conditions in terms of their core technology, the composition of the founding team, and the critical junctures during their establishment. This study analyses the state-of-the-art in quantitative empirical research on factors impacting the development of these types of firms. We present findings of both research fields and discuss them critically. Methodological and measurement issues receive particular attention in our analysis. Based on the literature review we identify factors impacting the development of both types of firms. Additionally we expose gaps in past and current research on academic and corporate spin-offs and suggest interesting opportunities for future research. Methodological shortcomings of existing studies are discussed. We derive implications for research on academic and corporate spin-offs and for the management of these types of firms.     

Analytical Properties of Solutions and First Integrals of a Class of the Third-Order Autonomous Systems

The paper is devoted to the analytic theory of differential equations.In paper shown that how to establish the analytical properties of solutions of an autonomous system of the third order special type(meromorphy of general solutions,instances of availability logarithmic branch points).The method for constructing the first integrals of the systems under consideration is indicated.     

Aging male symptomatology and eating behavior

Objective: The literature on eating disorders in older males is still very limited. We assessed the relationship between aging male symptomatology and eating behavior in middle-aged and older men.

Method: We distributed anonymous questionnaires to men aged 40–75?years living in or near Innsbruck, Austria, covering demographic items, current eating disorder symptoms (as defined by DSM-5), and associated measures of eating pathology, body image, and sports activity (including exercise addiction). We also administered the Aging Males’ Symptoms scale (AMS), and classified respondents as “high-AMS” (AMS score ≥37; N?=?82) or “low-AMS” (AMS score <37; N?=?386).

Results: High-AMS men reported a significantly higher mean current BMI, a greater prevalence of eating disorder symptoms, higher scores on the Eating Disorder Examination Questionnaire, greater risk of exercise addiction, and more negative body image than low-AMS men.

Discussion: We found a marked association between aging-male symptomatology and eating-disorder symptomatology in aging men. Our findings suggest that clinicians should carefully inquire about eating disorder symptoms in men aged 40 and above reporting aging-male symptomatology. Importantly, several men in the study reported “purging” via excessive exercise (as opposed to the more common methods of vomiting or use of laxatives or diuretics), and therefore this should be a subject of inquiry in clinical evaluations. To pursue these findings, subsequent studies of eating disorders in older men should consider assessing endocrinological measures, particularly testosterone levels, and should use longitudinal designs.     

Innovating in defence policy through spending efficiency: The Life Cycle Costing model

Research has shown that defence spending has repercussions on government policies and economic growth. At an international scale these implications, together with current financial difficulties affecting governments, justify the timeliness and interest of studying defence policies from the standpoint of efficiency. Many authors and international bodies such as NATO consider Life Cycle Costing (LCC) the best model for improving the efficiency of military investments. This paper examines the political repercussions in different countries of introducing the LCC model. The research methodology is based on a questionnaire that was replied to by the defence departments of 28 countries, classified as developing or developed.     

The mediating role of coping self‐efficacy beliefs on the relationship between parental conflict and child psychological adjustment

The effect of parental conflict on children's psychological adjustment is variable. Coping self‐efficacy refers to a person's perceived ability to self‐motivate and access the required cognitive resources to take control of, or exert their coping efforts in a stressful situation. This study investigated the mediating role of children's coping self‐efficacy beliefs between parental conflict and children's psychological adjustment (internalizing, externalizing, anxiety, and prosocial behavior). The participants were 663 school students in grade 5 (M = 10.17 years, SD = .53) and grade 7 (M = 12.11 years, SD = .52). The ethnic composition of the sample was approximately 72% White, 20% Asian, 4% Middle Eastern, and 4% from other ethnic groups. Coping self‐efficacy for avoiding maladaptive cognitions mediated the effect of parental conflict on children's internalizing symptoms longitudinally. The higher the level of parental conflict, the lower the level of children's coping self‐efficacy for avoiding maladaptive cognitions and in turn the higher their levels of internalizing. These findings support the mediational role of children's coping self‐efficacy beliefs in the context of parental conflict. It is proposed that these beliefs should be considered in designing and implementing preventative interventions for children in the context of parental conflict.     

Fast and robust estimators of variance components in the nested error model

Usual fitting methods for the nested error linear regression model are known to be very sensitive to the effect of even a single outlier. Robust approaches for the unbalanced nested error model with proved robustness and efficiency properties, such as M-estimators, are typically obtained through iterative algorithms. These algorithms are often computationally intensive and require robust estimates of the same parameters to start the algorithms, but so far no robust starting values have been proposed for this model. This paper proposes computationally fast robust estimators for the variance components under an unbalanced nested error model, based on a simple robustification of the fitting-of-constants method or Henderson method III. These estimators can be used as starting values for other iterative methods. Our simulations show that they are highly robust to various types of contamination of different magnitude.     

Promotion Time Cure Rate Model with Bivariate Random Effects

In this article, we consider the inclusion of random effects in both the survival function for at-risk subjects and the cure probability assuming a bivariate normal distribution for those effects in each cluster. For parameter estimation, we implemented the restricted maximum likelihood (REML) approach. We consider Weibull and Piecewise Exponential distributions to model the survival function for non-cured individuals. Simulation studies are performed, and based on a real database we evaluate the performance of our proposed model. Effect of different follow-up times and the effect of considering independent random effects instead of bivariate random effects are also studied.     

“Did I just do that?”—Six-month-olds learn the contingency between their vocalizations and a visual reward in 5 minutes

It has been shown that infants can increase or modify a motorically available behavior such as sucking, kicking, arm waving, etc., in response to a positive visual reinforcement (e.g., DeCasper & Fifer, 1980; Millar, 1990; Rochat & Striano, 1999; Rovee-Collier, 1997; Watson & Ramey, 1972). We tested infants to determine if they would also change their vocal behavior in response to contingent feedback, which lacks the social, emotional, and auditory modeling typical of parent-child interaction. Here, we show that in a single five-minute session infants increase the rate of their vocalizations in order to control the appearance of colorful shapes on an iPad screen. This is the first experimental study to demonstrate that infants can rapidly learn to increase their vocalizations, when given positive reinforcement with no social element. This work sets the foundations for future studies into the causal relationship between the number of early vocalizations and the onset of words. In addition, there are potential clinical applications for reinforcing vocal practice in infant populations who are at risk for poor language skills.