نتایج جستجو برای: group piers
تعداد نتایج: 980315 فیلتر نتایج به سال:
This cross-sectional self-report study examined (1) whether family functioning (Family Functioning in Adolescence Questionnaire, FFAQ) and self-image (Piers-Harris Children's Self-Concept Scale) have independent associations with smoking and alcohol use and (2) whether self-image mediates the relationship between family functioning, smoking, and alcohol use among 1,598 Hispanic males and female...
فرض کنید g یک گروه متناهی باشد به طوری که مربع هر درجه کاراکتر تحویل ناپذیر آن اندیس مرکز گروه را عاد می کند. آیا می توان نتیجه گرفت که گروه پوچتوان یا حتی حلپذیر است؟ همچنین در مورد بعضی از تعمیمهای فوقالذکر بحث خواهیم کرد. همچنین، تا چه اندازه ساختار یک گروه حلپذیر توسط بزرگترین درجه کاراکتر تحویل ناپذیر گروه تحت تاثیر قرار میگیرد مورد بحث قرار خواهد گرفت. let g be a finite group such tha...
Abstract Employment of protective structures is vital for reducing the effect local scour created surrounding bridge piers. One most effective used controlling and piers collars. Hence, research on mechanism scouring combination pier collar as well reduction great significance. In this study, various width-to-pier width ratios parameters rectangular has been investigated experimentally in 180-d...
A reliable prognostics framework is essential to prevent catastrophic failure of bridges due to scour. In the U.S., scour accounts for almost 60% of bridge failures. Currently available techniques in the literature for predicting scour are mostly based on empirical equations and deterministic regression models, like Neural Networks and Support Vector Machines, and do not predict the evolution o...
It is reported that every year hundreds of bridges were collapsed due to the dynamic forces acting on piers particularly during floods and scour around foundations. Since determination velocity distribution upstream pier directly related with this force, it important predict effect a presence diameter bridge turbulence parameters. In study, time variation point velocities in stream-wise vertica...
Abstract The paper presents an application of a risk‐based methodology – developed as joint research between Politecnico di Milano and Regione Lombardia for the prioritization interventions subsequent monitoring masonry arch bridge affected by riverbed erosion. Firstly, available data on regional inventory is evaluated to assign structural hydraulic class attention. Subsequently, onsite inspect...
OBJECTIVE To investigate the effectiveness of early class III protraction facemask treatment in children under 10 years of age. DESIGN Multicentre, randomized controlled trial. SETTING Eight UK hospital orthodontic units. SUBJECTS AND METHODS Seventy-three patients were randomly allocated, stratified for gender, into an early class III protraction facemask group (PFG) (n = 35) and a contr...
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