296 research outputs found

    The impact of renewable energy consumption to economic growth: a replication and extension of Inglesi-Lotz (2016)

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    This study replicates and extends the results presented in a top-cited article in this journal, Inglesi-Lotz (2016), which analyzes the impact of renewable energy consumption to economic growth for the OECD countries by applying the ordinary least squares with fixed effect estimator on the data from 1990 to 2010. By using the same data and methods, this study first produces and compare empirical results with those reported in the original article. Then, it applies a set of new econometric methods on the same data to address heterogeneity in renewable energy and economic growth across the analyzed group of countries. The panel quantile regression estimation shows that the effect of renewable energy consumption on economic growth is positive for lower and low-middle quantiles; however, its effect becomes negative for middle, high-middle, and higher quantiles when renewable energy consumption is proxied by the absolute value. Furthermore, a negative impact of renewable energy on economic growth is observed in almost all quantiles when it is proxied by the share of renewable energy consumption to total energy consumption. These results greatly differ from those of the original studypublishe

    The gender roles attitudes of medicals students: A cross-sectional study

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    Objective: Gender roles; refers to the roles traditionally associated with women and men. In studies conducted to determine the attitudes of university students towards gender roles in our country, it has been shown in different studies that male students have a more traditional view of gender roles than female students. In this study, it was aimed to determine the attitudes of university students studying gender roles and to investigate the effect of medical education on these attitudes. Method:This study is cross-sectional and conducted with the first and sixth year students who are studying medicine at Eskisehir Osmangazi University (ESOGÜ) Faculty of Medicine. Sociodemographic form and Gender Roles Attitude Scale (TCRSS) were applied to participants. Results: There was a significant difference between the first and sixth grades in terms of total TCRSS score and subscale scores (p> 0.05). There was no difference between the first and sixth grades (p> 0.05) in terms of averages of the scale scores for males (p> 0.05) when the scores of the groups were compared with the scores of the TCRSS and subscales after the participants had separated by sex. In the females, 6th-grade students had significantly higher traditional gender subscale scores (p = 0.033). Discussion: This study is, to our knowledge, the first study in the literature investigating attitudes towards gender roles in medical students in our country. In terms of content, it is recommended that medical education be organized to provide a transformative contribution to the attitudes of students towards gender roles

    Yükselen Piyasa Ekonomilerinde Finansal Gelişme ile İnsani Gelişme Arasındaki İlişki: Panel Vector Autoregression Yaklaşımı

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    DergiPark: 868141trakyasobedBu çalışmanın amacı en iyi 10 yükselen piyasa ekonomisinde finansal gelişmişliğin insani gelişim üzerindeki etkisini panel vector autoregression (PVAR) yaklaşımı kullanarak 1990-2018 dönemi için ele almaktır. Bu amaçla özel sektöre sağlanan krediler ve M2 para arzı temel finansal gelişim göstergeleri olarak benimsenmiştir. Elde edilen sonuçlar özel sektöre sağlanan kredilerin GSYH içindeki payında meydana gelen bir birimlik artışın insani gelişmişliği yaklaşık yüzde 0,2 artırdığı görülürken, M2 para arzındaki bir artışın istatistiksel olarak anlamlı bir etkisi tespit edilememiştir. Ayrıca nedensellik testi sonuçlarından insani gelişme ile finansal gelişme arasında çift yönlü bir nedensellik ilişkisinin varlığı tespit edilirken, M2 para arzı ile insani gelişim arasında nedensellik ilişkisine rastlanmamıştır

    Optimal Controller Design for Speed Governors of Hydroelectric Power Plant

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    Speed governors have critical importance on hydroelectric power plants, which are adjusted to the rotating speed of hydroelectric generation based on load demand of the grid. The rotating speed is the main factor to balance power generation and load demand. The well-designed controller is needed to control speed governors with high accuracy. A well-defined model is needed to obtain desired control structure. Therefore, in this study, initially, the mathematical model of a hydroelectric power plant is obtained by using physical characteristics of a real-world. Then by using this model and corresponding real-world data, a set of controller parameters is designed by using tuning methodologies based on heuristic optimization algorithms, and their performances are compared with each other and with a classical tuning methodology. Evolutionary-based and nature-inspired-based heuristic optimization algorithms are selected as the tuning algorithms not only to compare the performance of these algorithms with a classical method but also with different origins. The performance of the optimized controller improves the performance of the overall system and helps to get desired performance. The results also indicate that as long as the desired performance criteria are defined as accurate as possible, the performance of the optimization algorithms is acceptable

    NEURO-PROTECTIVE EFFECTS OF CROCIN ON BRAIN AND CEREBELLUM TISSUES IN DIABETIC RATS

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    Background: Increase in free oxygen radicals and the disruption of defense system make the neurons and astrocytes more sensitive against oxidative damage. Materials and Methods: Rats were divided into three groups containing 10, rats in each group namely: control (C) group, Diabetes Mellitus (DM) group, and Diabetes Mellitus + crocin (DM+crocin) group. Tissue samples were processed by routine histological and biochemical procedures. The sections were stained with Hematoxylen-eosin. Malondialdehyde (MDA), glutathione (GSH), blood glucose, HbA1c levels and xanthine oxidase (XO) activities were assayed. Results: The histological appearence of the cerebrum and cerebellum were normal in the control group. DM group showed some histopathological changes including congestion, perivascular and perineuronal edema in cerebrum. In DM + crocin group, histopathological changes in cerebrum and cerebellum markedly reduced. MDA level and XO activities increased significantly in DM group (

    THE EFFECT OF SAFFRON (ITS ACTIVE CONSTITUENT, CROCIN) ON THE CARDIOVASCULAR COMPLICATION AND DYSLIPIDEMIA IN STREPTOZOTOCIN INDUCED DIABETIC RATS

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    Background: Diabetes mellitus (DM) causes serious complications such as coronary heart disease, atherosclerosis, nephropathy, retinopathy and neuropathy. Materials and Methods: Rats were randomly divided into three groups each containing 10 rats; control group, DM group; DM+crocin group. Normal saline was administered in the control and DM groups, and crocin was administered in DM+crocin group at a dose of 20 mg/kg bw/day for 21 days. Trunk blood and the hearth tissue were collected for histopathological and biochemical examination. Results: DM led to increment of MDA levels (
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