ANALYSIS OF RECYCLING PERCEPTIONS OF 5-6-YEAR-OLD CHILDREN THROUGH PICTURES

The aim of this study is to examine the drawings of 5-6-year-old children attending preschool educational institutions regarding their perceptions of recycling. For this purpose, the pictures drawn by children who were administered recycling-themed drama activity and those who were not were examined. The study was designed in an experimental design with a control group. The content analysis method, one of the qualitative data collection methods, was used in the study. The data were collected by using the draw-narrate technique through the pictures drawn by the children. A total of 24 children aged 5-6 years, who were attending kindergartens in the 2022-2023 academic year, determined by convenience sampling method, participated in the study. After the drama activity on recycling was administered to 10 children in the first group, they were asked to draw pictures about recycling in the evaluation phase. The 13 children in the second group were asked what they thought of when they thought of recycling and were asked to draw pictures. The expressions of children describing the pictures they drew were noted. By using the content analysis method in the analysis of the data, children’s perceptions of recycling were tried to be revealed. As a result of the research, the rate of recycling figures in the pictures of children who drew pictures related to recycling after the drama activity on recycling was found to be significantly high (90%) compared to the pictures containing figures related to recycling in the pictures drawn by children who did not have a drama activity on recycling (46,1%).  Article visualizations

THE EFFECTS OF ENVIRONMENTAL EDUCATION GIVEN BY CREATIVE DRAMA METHOD ON ENVIRONMENTAL AWARENESS OF PRESCHOOL CHILDREN

The aim of this study is to examine the effects of environmental education given by creative drama method on 5-6 year old children on environmental awareness of children. The study, which has a mixed model in which qualitative and quantitative methods are used, has a quasi-experimental design with a pre-test and post-test control group. The study was carried out with a total of 26 children. The data were collected by using “Environmental Scale for Children” and by drawing pictures. As a result of the analyses of t-test, a significant difference in favour of the experimental group was found between the two groups (t= -7,676, p<.05). It has been determined that environmental education given by drama method has a positive effect on children's environmental awareness. The content analysis method was used for the analysis of pictures drawn by children at the end of the sessions. It was found that children reflected the importance of trees/forests, living things relation, importance of air and water in their pictures.  Article visualizations

Printed Dot Quality in Response to Doctor Blade Angle in Gravure Printing

Doctor blade is one of the critical machine part of the gravure printing press that controls the amount of ink transfer on the substrate. The angle of the blade can be varied; however, an improper angle may cause major problems. In this study, the doctor blade angle was positioned at three different level to address its effect on the printed dot quality. Print trials were made on a web-fed gravure press at the speed of 650 ft./min. A high-resolution overhead camera was used to analyze the key dot attributes. The results showed that measuring only the density of printed dot –a traditional quality control method– is insufficient. Incorporating the camera was assisted capturing missing dots, as well as quantifying dot area, perimeter and circularity. Print trials showed that the image quality was undesirable, when the blade angle exceeded or fell behind the optimum position

Using Generalizability Theory to Assess the Score Reliability of Communication Skills of Dentistry Students

The goal of this study is to determine the reliability of the performance points of dentistry students regarding communication skills and to examine the scoring reliability by generalizability theory in balanced random and fixed facet (mixed design) data, considering also the interactions of student, rater and duty. The study group of the research consists of the 16 dentistry students who took communication skills elective course in Hacettepe University in 2014-2015 academic year. In the study, the variability sources are taken as student (s), rater (r), occupation (o) and task (t). 16 students are assigned with 16 different duties and whether the students fulfill the duties is rated by 8 raters from two different occupation groups, 4 standard patients and 4 academicians. On these facets using different designs G study has been performed. Within the scope of this study the sxrxt design where all variability sources are crossed; sx(o:r)xt design where the occupation nested on rater as the result of scoring of the students by two different occupation groups as standard patient and academicians; sxaxt and sxspxt facets where rater facet is taken as fixed facet according to occupation groups (sp: Standard Patient, a: Academician) were examined. For each design estimated variance components are discussed separately

Erythropoietin Improves the Healing of Skin Necrosis Resulting From Doxorubicin Extravasation in a Rat Model

AbstractBackgroundDoxorubicin is an antineoplastic agent that causes skin necrosis when extravasated. Various agents have been tried to reduce tissue damage owing to extravasation. Erythropoietin (EPO) is an obligatory growth factor for red blood cells and has beneficial effects on wound healing.ObjectiveThe aim of this study was to test the hypothesis that local EPO injection can prevent and improve healing of necrosis at the doxorubicin injection site in rats.MethodsWe used 31 female Sprague-Dawley rats. The dorsal area of each rat was shaved, and 2 mg of doxorubicin in 0.5 mL saline was injected intradermally. The rats were then divided into 3 groups: control; control with intradermal injection of saline; and treatment, which received an intradermal injection of EPO. EPO in saline was injected into 4 quadrants of the same site where doxorubicin was injected 1 hour before. The rats were monitored and the area of each ulcer was measured. Skin biopsies were excised at the end of 4 weeks using anesthetic pentobarbital. Inflammation, edema, epithelization, neovascularization, necrosis, fibroblast proliferation, and collagen synthesis were evaluated and compared between groups.ResultsThe average areas of the lesions were significantly smaller in the EPO-injected rats (P = 0.03). The histopathologic evaluation revealed that the scores for epithelization, neovascularization, fibroblast proliferation, and collagen synthesis were higher (P < 0.001, P < 0.001, P = 0.002, and P = 0.04, respectively) and the score for necrosis was lower (P < 0.001) in the EPO-injected group than in both the saline-injected and control groups.ConclusionsIn this study using female Sprague-Dawley rats, EPO treatment improved the healing of skin necrosis caused by doxorubicin injection. This finding may lead to a new therapeutic approach for the management of skin necrosis caused by doxorubicin extravasation

Capital account liberalization in China: the need for a balanced approach

This repository item contains a single issue of the Pardee Center Task Force Reports, a publication series that began publishing in 2009 by the Boston University Frederick S. Pardee Center for the Study of the Longer-Range Future.This is the third report stemming from the Pardee Center Task Force on Regulating Capital Flows for Long-Run Development, a project of the Global Economic Governance Initiative (GEGI) at Boston University. This report is the collective work of experts examining the benefits and risks of accelerated capital account liberalization in China. The contributing authors – all leading scholars and practitioners from around the world (listed below) – met at Boston University in February 2014 to discuss the experiences of other emerging market countries that liberalized the capital account to glean lessons for China as it considers this delicate task. This volume is an outcome from that meeting, presenting the authors’ perspectives on important aspects of capital account liberalization that China should pay special attention to, not only for its own sake, but also in consideration of the potential impacts that China’s actions may have on other emerging markets and the global economy overall

Can a Unruh Detector Feel a Cosmic String?

Unruh's detector calculation is used to study the effect of the defect angle $\beta$ in a space-time with a cosmic string for both the excitation and deexcitation cases. It is found that a rotating detector results in a non-zero effect for both finite (small) and infinite (large) time

Vacuum fluctuations for spherical gravitational impulsive waves

We propose a method for calculating vacuum fluctuations on the background of a spherical impulsive gravitational wave which results in a finite expression for the vacuum expectation value of the stress-energy tensor. The method is based on first including a cosmological constant as an auxiliary constant. We show that the result for the vacuum expectation value of the stress-energy tensor in second-order perturbation theory is finite if both the cosmological constant and the infrared parameter tend to zero at the same rate.Comment: Class. Quantum Grav. 13(1996) 2683-269

Thermal conductivity control by oxygen defect concentration modification in reducible oxides: The case of Pr0.1Ce0.9O2−δ thin films

We demonstrate the impact on thermal conductivity of varying the concentration of oxygen vacancies and reduced cations in Pr[subscript 0.1]Ce[subscript 0.9]O[subscript 2−δ] thin films prepared by pulsed laser deposition. The oxygen vacancy concentration is controlled by varying the oxygen partial pressure between 1 × 10[superscript −4] and 1 atm at 650  °C. Corresponding changes in the oxygen non-stoichiometry (δ) are monitored by detecting the lattice parameters of the films with high-resolution X-ray diffraction, while the thermal properties are characterized by time-domain thermoreflectance measurements. The films are shown to exhibit a variation in oxygen vacancy content, and in the Pr[superscript 3+]/Pr[superscript 4+] ratio, corresponding to changes in δ from 0.0027 to 0.0364, leading to a reduction in the thermal conductivity from k = 6.62 ± 0.61 to 3.82 ± 0.51 W/m-K, respectively. These values agree well with those predicted by the Callaway and von Baeyer model for thermal conductivity in the presence of point imperfections. These results demonstrate the capability of controlling thermal conductivity via control of anion and cation defect concentrations in a given reducible oxide.National Science Foundation (U.S.). Materials Research Science and Engineering Centers (MRSEC Program, Award No. DMR-0819762