Components associated with the effect of home visiting programs on child maltreatment: A meta-analytic review

Background: Home visiting programs are widely endorsed for preventing child maltreatment. Yet, knowledge is lacking on what and how individual program components are related to the effectiveness of these programs. Objective: The aim of this meta-analysis was to increase this knowledge by summarizing findings on effects of home visiting programs on child maltreatment and by examining potential moderators of this effect, including a range of program components and delivery techniques. Methods: A literature search yielded 77 studies (N=48,761) examining the effectiveness of home visiting programs, producing 174 effect sizes. In total, 35 different program components and delivery techniques were coded. Results: A small but significant overall effect was found (d=0.135, 95 % CI (0.084, 0.187), p<0.001). Programs that focused on improving parental expectations of the child or parenthood in general (d = 0.308 for programs with this component versus d = 0.112 for programs without this component), programs targeting parental responsiveness or sensitivity to a child's needs (d = 0.238 versus d = 0.064), and programs using video-based feedback (d = 0.397 versus d = 0.124) yielded relatively larger effects. Providing practical and instrumental assistance was ne

Basic Module Theory over Non-Commutative Rings with Computational Aspects of Operator Algebras

The present text surveys some relevant situations and results where basic Module Theory interacts with computational aspects of operator algebras. We tried to keep a balance between constructive and algebraic aspects.Comment: To appear in the Proceedings of the AADIOS 2012 conference, to be published in Lecture Notes in Computer Scienc

CHEMICAL VAPOUR DEPOSITION OF THIN FILMS IN THE SYSTEM B-P

L' effet de la composition initiale des gaz et de la température par CVD classique sous pression atmosphérique à partir de BBr3-PBr3-H2 a été principalement étudié. La rugosité du substrat de silice fondue a été modifiée. Avec une augmentation de température et une décroissance du rapport BBr3/PBr3 on observe un changement de méchanisme de depôt du monophosphure cubique (on passe d'un contrôle cinétique au contrôle diffusionel). Dans le régime limité par la diffusion, on n'observe pas le dépôt de BP cubique si le substrat n'a pas de sites de nucléation. Dans ce cas, un film amorphe de BxP (x > 1) est obtenu ; sa teneur en phosphore dépend du rapport BBr3/PBr3.The effect of the growth parameters on the deposition of boron phosphides BxP by thermally activated atmospheric pressure CVD was studied for the boron tribromide - phosphorus tribromide - hydrogen system, with main emphasis on the reactant molar ratio and the temperature. The surface roughness of the fused silica substrates was varied. With increasing temperature and with decreasing BBr3/PBr3 molar ratio a transition in the growth mechanism for cubic boron monophosphide BP from kinetically controlled to diffusion controlled is observed. No deposition of cubic BP is observed in the diffusion controlled regime if the substrate exhibits a lack of nucleation sites. In this case a dense film of boron rich amorphous boron phosphide BxP (x > 1) is observed with a phosphorus content depending on the BBr3/PBr3 molar ratio during deposition