298 research outputs found

    The Effectiveness of Applying Inquiry Based Learning Model in Supporting Students' Creativity in Learning English

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    This study aims to find out the effectiveness of Inquiry Based Learning (IBL) Model in supporting students' creativity in learning English hortatory exposition text for eleventh grade students of SMA Pontianak Academic Year 2014/2015 . This research was a quasi experimental research with non-equivalent control group design. The sample used was purposive sampling where XI MIA 1 as the expreimental class and XI MIA 3 as the control class. Questionnaire was the tool to investigate the level of students' creativity in learning hortatory exposition text. The questionnaire was administered as measurement before and after the treatment. The calculation of questionnaire score was based on Likert's Scale. The calculation of effect size shows the number of 2.06 (>1.00) which is categorized as “strong”. The data revealed that the students in experimental class got more opportunities for sharing their ideas in the IBL classroom and those opportunities resulted to the improvement of students' creativity

    The Trend Analysis on the Research Methods and Techniques Used in Research on Speaking

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    This research aimed to identify the method of research and teaching technique used and the educational levels preferred in students' thesis on speaking. Thisresearch used descriptive method. The subjects of research were 40 theses on speaking by students of English Education Study Program during the period of 2009-2012.The research data were taken from UPT Perpustakaan Tanjungpura University. The result of the study showed that based on the method of research used, Classroom Action Research was 65% or it was the most frequently used. Pre Experimental was 20% and Descriptive Study was 12.5%. Based on the teaching techniques used, Role Play was dominated about 22.5%, Chain Pictures was 10%, Songs andDrama were 5% in each. Based on the educational level researchers preferred; Junior High was 40%, Senior High was 40%, University was 7.5%, Course was 7.5% and Elementary level was 5%

    Improving the Students Ability in Reading Narrative Text by Using Folk Tale (Local Legend)

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    This research was conducted based on the problems which were found in the process of teaching and learning narrative text by the eighth grade class A students of SMP Yos Sudarso Parindu. The problems were that they were uninterested in reading lesson and they got low motivation in learning English especially in reading class. Consequently, the students got difficulty to understand the grammatical construction in the text they read; they did not know the meaning of unfamiliar vocabulary. Besides, the reading materials in the text book were not interesting to them because the stories often came from other countries and the reading texts were not appropriate to the students background knowledge

    The Jabal Akhdar Dome in the Oman Mountains : evolution of a dynamic fracture system

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    Acknowledgments: This study was carried out within the framework of DGMK (German Society for Petroleum and Coal Science and Technology) research project 718 “Mineral Vein Dynamics Modelling,” which is funded by the companies ExxonMobil Production Deutschland GmbH, GDF SUEZ E&P Deutschland GmbH, RWE Dea AG and Wintershall Holding GmbH, within the basic research program of the WEG Wirtschaftsverband Erdo¨l- und Erdgasgewinnung e.V. We thank the companies for their financial support and their permission to publish these results. The German University of Technology in Oman (GU-Tech) is acknowledged for its logistic support. We gratefully acknowledge the reviewers Andrea Billi and Jean-Paul Breton, whose constructive reviews greatly improved the manuscriptPeer reviewedPreprin

    Kinematics of Crystal Growth in Single‐Seal Syntaxial Veins in Limestone ‐ A Phase‐Field Study

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    Building on recent developments in phase-field modeling of structural diagenesis, we present an analysis of single-seal syntaxial calcite vein microstructure in a variety of limestones. We focus on the effects of fracture aperture, intergranular versus transgranular fracturing, crystal habit and the presence of second phases in the host rock, to systematically investigate a simplified set of models covering the main classes of limestone in 2D. We incorporate the kinematic process of growth competition between differently oriented crystals, growth rate anisotropy between rough and faceted crystal surfaces and different growth rates on intergranular to transgranular fractures. Results show that within the considered parameter space we can reproduce a wide range of vein microstructures in limestone known in nature, such as stretched crystals, wide-blocky veins, and elongated crystals. We identify five archetypes of vein microstructures in limestones, which are diagnostic for different kinematics and evolution of transport processes and illustrate the effect of key parameters in microstructure maps. We show how syntaxial veins with median line form after intergranular fracturing, while stretched crystals indicate transgranular fracturing. Intergranular fracturing leads to stronger growth competition and more prominent CPO in syntaxial veins. Our results can be extended to 3D to include multiple crack-seal events, pore-space cementation and simulation of fluid flow, providing a generic platform for modeling structural diagenesis in limestones

    Alimentary Canal of the Adult Blow Fly, Chrysomya megacephala (F.) (Diptera: Calliphoridae)—Part I: Ultrastructure of Salivary Glands

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    The salivary gland ultrastructure of the adult male blow fly, Chrysomya megacephala (F.) (Diptera: Calliphoridae), was investigated at the ultrastructural level using light microscopy (LM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The salivary glands are paired structures composed of a single median deferent duct bifurcated into two long, narrow efferent ducts connected to the coiled tubular glands. The SEM image of the gland surface revealed that the basal lamina is relatively smooth in general, but the whole surface appeared as a trace of rough swollen insertion by intense tracheal ramification. Ultrastructurally, the salivary gland is enclosed within the basal lamina, and interdigitation cytoplasmic extensions were apparent between the adjacent gland cells. The basement membrane appeared infoldings that is similar to the complex of the labyrinth channel. The cytoplasm characteristic of the gland revealed high activity, based on the abundance of noticeable secretory granules, either singly or in an aggregated reservoir. In addition, mitochondria were found to intersperse among rich parallel of arrays rough endoplasmic reticulum. Thick cuticle, which was well-delineated and electron dense, apically lined the gland compartments, with discontinuity of the double-layer cuticle revealing a trace of secretion discharged into the lumen. Gross anatomy of the adult salivary gland was markedly different from that of the third instar of the same species, and structural dissimilarity is discussed briefly

    Pupil-linked Phasic Arousal Predicts a Reduction of Choice Bias Across Species and Decision Domains

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    Decisions are often made by accumulating ambiguous evidence over time. The brain's arousal systems are activated during such decisions. In previous work in humans, we found that evoked responses of arousal systems during decisions are reported by rapid dilations of the pupil and track a suppression of biases in the accumulation of decision-relevant evidence (de Gee et al., 2017). Here, we show that this arousal-related suppression in decision bias acts on both conservative and liberal biases, and generalizes from humans to mice, and from perceptual to memory-based decisions. In challenging sound-detection tasks, the impact of spontaneous or experimentally induced choice biases was reduced under high phasic arousal. Similar bias suppression occurred when evidence was drawn from memory. All of these behavioral effects were explained by reduced evidence accumulation biases. Our results point to a general principle of interplay between phasic arousal and decision-making
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