Effect of Monetary Reward on Artistic Creativity

This study was undertaken in an attempt to expand previous research on the effects of material rewards on performance. Specifically, the purpose of this study was to assess the effects of material rewards on artistic creativity. This study was designed, also, to test the validity of the reward induced developmental regression hypothesis in an attempt to provide an adequate theoretical explanation for the differential effects of rewards on performance. Monetary rewards were found to have differential effects on artistic creativity and technical performance, on HIT variables associated with creativity, perceptual organization, and emotional disturbances affecting perception and fantasy. The enhancing and detrimental effects of rewards were found to be mediated by some important independent variables, such as the cognitive/emotional nature of the task, sex of subjects, training in art, and presence of artists in the family. An attempt is made in the present study, to explain the findings obtained within the notion of reward induced developmental regression. This dissertion differs somewhat from the format called for in the Oklahoma State University Thesis Writing Manual. The body of this dissertation consists of a complete manuscript prepared for publication entitled, "Effects of Monetary Rewards on Artistic Creativity," prepared according to the Publication Manual of the American Psychological Association, Third Edition. In order that the dissertation be complete by traditional standards, the Review of Literature section, which is usually presented in the body of the dissertation is presented in Appendix A. Also included as appendix materials are all supplemental materials (rating scales, questionnaire, etc,), raw data, and various statistical analyses.Home Economics-Family Relations and Child Developmen

Comparative study of some cardiovascular diseases risk factors in type D personality and non- type D personality

زمینه و هدف: ریخت شخصیتی D (Distressed personality) حدود 21 جامعه سالم را تشکیل داده است و به عنوان یک ریسک فاکتور در بروزبیماری های قلبی-عروقی شناخته می شود. این تحقیق به منظوربررسی برخی ریسک فاکتورهای بروز بیماری های قلبی در افراد بزرگسال سالم دارای ویژگی ریخت شناسی D انجام شده است. روش بررسی: در این مطالعه توصیفی-تحلیلی 54 نفر (زن و مرد) از بین مراجعه کنندگان به مرکز آزمایشگاهی المهدی شهرکرد به روش نمونه گیری در دسترس انتخاب شدند. افراد تحت مطالعه بر اساس مقیاس DS14 به دو گروه تقسیم شدند. 27 نفر آنها که دارای تیپ شخصیتی D بودند در گروه مورد و 27 نفر دیگر که فاقد تیپ شخصیتی Dبودند در گروه شاهد قرار گرفتند. داده های پژوهش از طریق آزمون افسردگی بِک (Beck)، مقیاس های اضطراب و خشم اسپیلبرگر و نتایج آزمایشگاهی کلسترول، تری گلیسیرید،LDL و HDL جمع آوری شدند. برای تجزیه و تحلیل داده ها ازآزمون t مستقل استفاده شد. یافته ها: میزان اضطراب، افسردگی، خشم و LDL در گروه مورد به طور معنی داری بیشتر از گروه شاهد بود بود (05/0>P). میزان HDL بصورت جزئی در گروه مورد کمتر از گروه شاهد بود (052/0= P) و ارتباط معنی داری بین شخصیت D وکلسترول و تری گلیسیرید دیده نشد (05/

Gelation Time of Hexamethylenetetramine Polymer Gels Used in Water Shutoff Treatment

Among the methods available to reduce water production, injecting a gelling system composed of a polymer and a crosslinker has been widely used. In this work, a hydrogel was prepared by crosslinking of an aqueous solution containing hexamethylenetetramine (HMTA) as crosslinker, hydrochloric acid (HCl) as an activator, and the co-polymer of 2-acrylamido-2methyl-propanesulfonic-acid sodium salt (AMPS) and acrylamide (PAMPS). In order to indicate the effective factors on the gelation time and also to develop the quadratic mathematical models, central composite design (CCD) was applied. Therefore, the main purpose was to establish functional relationship between the three factors (polymer concentration, HMTA, and hydrochloric acid) and a response (gelation time) by using a statistical technique. In order to determine the optimum value of these factors for maximum gelation time, a simultaneous optimization was also applied. The results of the analysis of variance (ANOVA) of the developed model illustrated that the fitted model was significant in a 99% confidence limit. The results showed that hydrochloric acid was identified as the main factor effecting the gelation time and there was also an interaction between HMTA and hydrochloric acid. Finally, a mechanism for the reaction between PAMPS and HMTA were presented

An experimental and numerical investigation of the use of liquid flow in serpentine microchannels for microelectronics cooling

This paper presents a combined experimental and numerical investigation of single-phase water flow and heat transfer in serpentine rectangular microchannels embedded in a heated copper block. The performance of four different microchannel heat sink (MCHS) configurations are investigated experimentally, the first having an array of straight rectangular microchannels (SRMs), while the other have single (SPSMs), double (DPSMs) and triple path multi-serpentine rectangular microchannels (TPSMs). Three-dimensional conjugate heat transfer models are developed for both laminar and turbulent single-phase water flows in each of these MCHSs and the governing flow and energy equations solved numerically using finite elements. The numerical predictions of pressure drop (∆P) and average Nusselt number (〖Nu〗_avg) are in good agreement with experimental data, and indicated that the single path serpentine microchannel (SPSM) leads to a 35% enhancement of the 〖Nu〗_avg at a volumetric flow rate of 0.5 l/min and a 19% reduction in total thermal resistance (R_th) compared to the conventional SRM heat sink. However, this enhancement is at the expense of a large (up to ten-fold) increase in ∆P compared to the SRM heat sink, so that a suitable compromise must be struck between heat transfer and pressure drop in practical MCHS designs

Multi-cation perovskites prevent carrier reflection from grain surfaces

© 2020, The Author(s), under exclusive licence to Springer Nature Limited. The composition of perovskite has been optimized combinatorially such that it often contains six components (AxByC1−x−yPbXzY3−z) in state-of-art perovskite solar cells. Questions remain regarding the precise role of each component, and the lack of a mechanistic explanation limits the practical exploration of the large and growing chemical space. Here, aided by transient photoluminescence microscopy, we find that, in perovskite single crystals, carrier diffusivity is in fact independent of composition. In polycrystalline thin films, the different compositions play a crucial role in carrier diffusion. We report that methylammonium (MA)-based films show a high carrier diffusivity of 0.047 cm2 s−1, while MA-free mixed caesium-formamidinium (CsFA) films exhibit an order of magnitude lower diffusivity. Elemental composition studies show that CsFA grains display a graded composition. This curtails electron diffusion in these films, as seen in both vertical carrier transport and surface potential studies. Incorporation of MA leads to a uniform grain core-to-edge composition, giving rise to a diffusivity of 0.034 cm2 s−1 in CsMAFA films. A model that invokes competing crystallization processes allows us to account for this finding, and suggests further strategies to achieve homogeneous crystallization for the benefit of perovskite optoelectronics