Pembelajaran Kooperatif Tipe Student Achievement Divisions (Stad)

This study is a classroom action research (PTK) with a research subject of 30 people, consisting of 18 men and 12 women. After data was collected, it was analyzed with quantitative descriptive analysis. The results of data analysis show can achieve good learning achievement of the application of STAD type cooperative learning model can improve student learning outcomes of class X P IBB 2 SMA Negeri 1 Ubud in Hindu education semester I year of lesson 2014/2015. This is evidenced by the increase in the average data of the student learning outcomes from cycle I to cycle II. Second, the application of STAD type cooperative learning model can accommodate the increase of student's satisfaction level in learning. The level of satisfaction is represented by the response to the application of STAD type of cooperativelearning model. This is evidenced by the increase in the average data response of students fromcycle I to cycle II

Reciprocal dry sliding wear behaviour of B4Cp reinforced aluminium alloy matrix composites

Manuscript DraftIn the present work, AlSi9Cu3Mg alloy matrix composites reinforced with 15 and 19% (vol.) B4Cp were produced by squeeze casting route at 850 °C under low vacuum. Titanium-containing flux (K2TiF6) was used to promote the wetting between B4C and liquid aluminium metal. It was found, from the microstructural observations, that the wetting improved by the formation of a thin Ti-rich reaction layer. In order to investigate the wear properties, the samples were subjected to reciprocating wear tests against AISI 4140 pin under dry sliding conditions. Effect of B4C volume fraction, sliding velocity, applied load and sliding distance on reciprocal dry wear behaviour of composites was studied using general full factorial experimental design. Effects of factors and interactions on the coefficient of friction (COF) and the wear rate values of both composite specimens and counter materials were studied. Worn surfaces and wear debris were characterised using field emission gun scanning electron microscope (FEG-SEM), Energy Dispersive X-Ray Spectroscopy (EDS), optical microscope (OM) and XRay diffraction (XRD). From microstructural investigations, wear mechanism suggested as a combination of adhesive, abrasive, and delamination wear.This study was partially supported by TUBITAK (The Scientific and Technological Research Council of Turkey) under Grant No. 107M338. The authors would also like to thank for their kind help to Prof. O. Keles from Istanbul Technical University for experimental design studies, and Prof. J. Gomes and Mr. S. Carvalho from University of Minho for tribological studies

Developing Ict-based Reading Materials for Grade-eight Students of Junior High School

This study was aimed at developing ICT-based reading materials for grade-eight students of Junior High School at SMPN 1 Kubutambahan which met the criteria of good reading materials and investigating whether the ICT-based reading materials were able to improve the students' reading competency. It was conducted through seven steps: need analysis, product design, design evaluation, design revision, field test (CAR), product revision and prototype product. The data were collected using questionnaires and reading tests. The data obtained were analyzed qualitatively and quantitatively. Based on the findings of this study, it was concluded that (1) the ICT-based reading materials could be developed through need analysis, then designing the product, evaluating the product design by experts, revising the product design, field-testing the product (through CAR), re-revising the product and finally producing the prototype product; (2) the ICT-based reading materials were able to improve the students' reading competency significantly

A Comparative Study on the Effect of Cooperative Learning Techniques (Nht & Tps) on Students\u27 Reading Comprehension Viewed From Different Text Types

The present study aimed at comparing the effect of two cooperative learning techniques, namely, Numbered Heads Together (NHT) and Think-Pair-Share (TPS) viewed from different text types (narrative, spoof, and hortatory exposition) on students\u27 reading comprehension. The research design used in this study was Post-test Only Comparison Group Design. The samples were two classes of the eleventh grade students at SMA Negeri 2 Singaraja. After the treatment sessions, post-test was administered to obtain the data. The data obtained from the post-test were analyzed by using descriptive and inferential statistical analyses. From the analyses, it was found that there was a significant difference between the effect of those techniques. There was an interaction between the techniques and the text types. NHT affected better than TPS although in spoof and hortatory exposition texts the differences were not significant. This study has the implication to EFL pedagogy especially in the teaching of reading skill

Peran Mediasi Komitmen Organisasional pada Pengaruh Stress Kerja dan Kepuasan Kerja terhadap Intensi Keluar Karyawan

Penelitian ini bertujuan untuk menganalisis peran mediasi komitmen organisasional pada pengaruhnya terhadap stres kerja dan kepuasan kerja terhadap intensi keluar karyawan. Penelitian ini menggunakan 79 responden dengan mengambil responden dari karyawan tetap dan karyawan kontrak. Pengujian dilakukan dengan metode PLS (Partial Least Square) dengan program smartPLS. Berdasarkan hasil analisis disimpulkan stres kerja berpengaruh positif dan signifikan terhadap intensi keluar, stres kerja terbukti berpengaruh negatif dan signifikan terhadap komitmen organisasional, kepuasan kerja berpengaruh negatif terhadap intensi keluar, kepuasan kerja berpengaruh positif dan signifikan terhadap komitmen organisasional dan komitmen organisaional berpengaruh negatif signifikan terhadap intensi keluar, komitmen organisasional memediasi secara parsial hubungan antara stres kerja dan kepuasan kerja terhadap intensi keluar. Implimentasi dari penelitian ini bahwa untuk menekan tingkat intensi keluar karyawan hendaknya Perusahaan memberikan penghargaan kepada karyawan, memberikan kesempatan kepada karyawan menjadi orang yang diperlukan di Perusahaan, dan menanamkan rasa peduli akan keberlangsungan Perusahaan

High-normal blood glucose levels may be associated with decreased spatial perception in young healthy adults.

The negative effects of high normal glucose on cognitive function were previously reported in euglycemic individuals of middle age and the elderly population. This study aimed at examining the effect of baseline blood glucose levels on spatial ability, specifically verticality perception on the computerized rod and frame test (CRFT) in young healthy adults. 63 healthy male medical students (age range from 18-23 years), of whom 30 were non-fasting outside the month of Ramadan and 33 fasting during Ramadan of the year 2016, were recruited in order to create varying degrees of glycemia during which verticality perception was carried out. Baseline blood glucose reading was obtained prior to commencing the CRFT test. Blood glucose levels at the time of testing decreased as the duration between the last meal and testing increased. A blood glucose range of 62-117 mg/dl was achieved among participants for this study. Linear regression analysis showed that blood glucose level at testing correlated positively with all alignment spatial error parameters, indicating a probable reduction of spatial perception ability with higher blood glucose levels. These results are consistent with other cognitive studies in older healthy humans and emphasize the critical impact of early glucose dys-homeostasis on cognitive function. They also indicate that elevated blood glucose may affect cognitive functioning outside of the usual complications of diabetes

Regional mitochondrial DNA and cell-type changes in post-mortem brains of non-diabetic Alzheimer’s disease are not present in diabetic Alzheimer’s disease

Background: Mitochondrial dysfunction is implicated in both diabetes and Alzheimer’s disease (AD), and diabetes also increases the risk of AD, however the combined impact of AD and diabetes on brain mitochondria is unknown. The purpose of this study was to test the hypothesis that the combination of both diabetes and AD exacerbates mitochondrial dysfunction. Methods: Post-mortem human brains (n=74), were used to determine mitochondrial DNA (mtDNA) content of cerebellum, frontal cortex and parietal cortex by quantifying absolute mtDNA copy number/cell using real time qPCR. mtDNA content was compared between diabetic and non-diabetic cases representing non-cognitively impaired controls (NCI), mildly cognitively impaired (MCI) and AD. A subset of parietal cortex samples was used to quantify mRNAs corresponding to cell types and mitochondrial function. Immune-staining of parietal cortex sections followed by semi-automated stereological assessment was performed to assess cell types. Results. Using mtDNA as an indicator of mitochondrial content, we observed significant regional variation, being highest in the parietal cortex, and lowest in the cerebellum. In the absence of diabetes, AD cases had decreased parietal cortex mtDNA, reduced MAP2 (neuronal) mRNA and increased GFAP (astrocyte) mRNA, relative to NCI. However, in the presence of both diabetes and AD, we did not observe these changes in the parietal cortex. Irrespective of cognitive status, all 3 brain regions in diabetic cases had significantly higher mtDNA than the non-diabetic cases. Conclusion. Our data show that the parietal cortex has the highest mitochondrial content but is also the most vulnerable to changes in AD, as shown by reduced mtDNA and neurones in this region. In contrast, when patients have both diabetes and AD, the AD associated parietal cortex changes are no longer seen, suggesting that the pathology observed in diabetic AD may be different to that seen in non-diabetic AD. The lack of clear functional changes in mitochondrial parameters in diabetic AD suggest that there may be different mechanisms contributing to cognitive impairment in diabetes and their impact on the respective disease neuro-pathologies remain to be fully understood