Adolescents' experience doing homework: Associations among context, quality of experience, and outcomes

Abstract Extant data collected through the Experience Sampling Method -a signal contingent method for gathering data about students' immediate experienceswere analyzed to describe adolescents' subjective experiences doing homework. Analyses were conducted to explore variation in subjective experience in relation to the contexts in which homework was completed, and in relation to academic and social-emotional outcomes. Students' cognitive, affective, and motivational states showed significant variations depending on who they were with when they were doing homework, as well as whether homework was their primary or secondary activity. Variations in the quality of homework experience were, in turn, significantly associated with several outcomes, such as self-esteem, future expectations, and school grades. Findings are discussed in terms of contributions to the homework literature by addressing the much needed link between homework and students' cognitive, affective, and motivational states

Conceptual robustness in simultaneous engineering: An extension of Taguchi's parameter design

Simultaneous engineering processes involve multifunctional teams; team members simultaneously make decisions about many parts of the product-production system and aspects of the product life cycle. This paper argues that such simultaneous distributed decisions should be based on communications about sets of possibilities rather than single solutions. By extending Taguchi's parameter design concepts, we develop a robust and distributed decision-making procedure based on such communications. The procedure shows how a member of a design team can make appropriate decisions based on incomplete information from the other members of the team. More specifically, it (1) treats variations among the designs considered by other members of the design team as conceptual noise; (2) shows how to incorporate such noises into decisions that are robust against these variations; (3) describes a method for using the same data to provide preference information back to the other team members; and (4) provides a procedure for determining whether to release the conceptually robust design or to wait for further decisions by others. The method is demonstrated by part of a distributed design process for a rotary CNC milling machine. While Taguchi's approach is used as a starting point because it is widely known, these results can be generalized to use other robust decision techniques.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/45879/1/163_2005_Article_BF01608400.pd

Estimating the Diets of Animals Using Stable Isotopes and a Comprehensive Bayesian Mixing Model

Using stable isotope mixing models (SIMMs) as a tool to investigate the foraging ecology of animals is gaining popularity among researchers. As a result, statistical methods are rapidly evolving and numerous models have been produced to estimate the diets of animals—each with their benefits and their limitations. Deciding which SIMM to use is contingent on factors such as the consumer of interest, its food sources, sample size, the familiarity a user has with a particular framework for statistical analysis, or the level of inference the researcher desires to make (e.g., population- or individual-level). In this paper, we provide a review of commonly used SIMM models and describe a comprehensive SIMM that includes all features commonly used in SIMM analysis and two new features. We used data collected in Yosemite National Park to demonstrate IsotopeR's ability to estimate dietary parameters. We then examined the importance of each feature in the model and compared our results to inferences from commonly used SIMMs. IsotopeR's user interface (in R) will provide researchers a user-friendly tool for SIMM analysis. The model is also applicable for use in paleontology, archaeology, and forensic studies as well as estimating pollution inputs

Вплив коефіцієнта тепловіддачі від не обігрівається поверхности на точність визначення характеристики вогнестійкості перегородок з сендвіч-панелей

n this paper, a study of thermal processes in the partitions, with one-sided fire exposure and influence the accuracy of the job setting and on the άс2 dependence on the thickness of the walls of fire resistance, which showed a strong influence of the boundary conditions, describing heat transfer processes on the unexposed surface of the baffle on the accuracy determine the limits of fire resistance.В данной работе проведено исследование тепловых процессов в перегородках, при одностороннем огневом воздействии и влияние точности задания параметра а с^ на зависимость толщины перегородки от предела огнестойкости, которые показали сильное влияние граничного условия, описывающего процессы теплоотдачи на необогреваемой поверхности перегородки на точность определения пределов огнестойкости.У даній роботі проведено дослідження теплових процесів в перегородках, при односторонньому вогневого впливу і вплив точності завдання параметра а з άс2 на залежність товщини перегородки від межі вогнестійкості, які показали сильний вплив граничної умови, що описує процеси тепловіддачі на не обігрівається поверхні перегородки на точність визначення меж вогнестійкості

<b style="">Establishment and Economic evaluation of micropropagated <i style="">Jeewanti</i> (<i>Leptadenia reticulata</i> Wight & Arn.) plants in field </b><b style=""></b>

311-314 Leptadenia reticulata Wight & Arn. is an important medicinal plant. There is heavy demand of the plant and its biomass which can not be fulfilled by the natural/ present practices of propagation. Natural propagation of this plant is poor and the plant is threatened in nature. Thus, there is a need for applying biotechnological methods for large scale propagation. Micropropagation studies were carried out by the authors on explants. Multiple shoots were differentiated on Murashige and Skoog’s (MS) medium containing 5.0 mg/litre 6-benzylaminopurine (BAP). The shoots further multiplied on MS medium + 1.5 mg/litre BAP and 0.5 mg/litre kinetin (KN) and the cloned shoots, treated with 200 mg/litre of Indole-3-butyric acid (IBA), rooted ex vitro. The plantlets were transferred to bottles containing soilrite moistened with half-strength MS macro salts. The hardened plants were transferred to polybags and kept in shade house for acclimatization. Subsequently field trials were carried out at villages Manai (Jodhpur) and Kachholi (Sirohi) of Rajasthan. In the present paper establishment of micropropagated plants, cultivation, growth and net profit from biomass produced has been reported for environmental conditions of Rajasthan. Total dry biomass harvested was 2800 kg/acre/ for first year and 3000 kg/acre/for second year