Meslek Yüksek Okulları / Vocational Schools
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Item Evaluation of Radioactivity Levels and Radiological Hazards of Some Endemic Plants Used as Medicine in Ankara, Turkey(2023) Guven, Aysel; Cengiz, Gulcin Bilgici; Caglar, Ilyas; Ates, Simge; 37536028In this study, natural radioactivity levels (Ra-226, Th-232, and (4) K) of some medicinal plant samples with known anti-oxidative properties, which are frequently consumed by animals and humans, were obtained from Ankara province and its surroundings (Mamak, Kizilcahamam, Beypazari, Kahramankazan, and Polatli districts) were determined using a thallium-doped sodium iodide NaI(Tl) gamma spectrometry. By using the determined natural radioactivity concentrations in the collected plant samples, the number of radiological doses that people could be exposed by consuming these plants was calculated. As a result of the study, Ra-226, Th-232, and (4) K radioactivity concentration ranges of the plant samples were found be 14.69 +/- 1.27-59.08 +/- 3.12 Bq kg(-1), 1.78 +/- 0.04-50.05 +/- 2.76 Bq kg(-1) and 207.24 +/- 34.09-826.13 +/- 25.40 Bq kg(-1), respectively. The highest Ra-226, Th-232, and (4) K activity concentrations were measured in Astragalus densifolius subsp. ayashensis (Kahramankazan), Astragalus kochakii (Kahramankazan) and Rumex patientia (Patience Dock) (Kahramankazan) plants, respectively. The lowest Ra-226, Th-232 and,(4) K activity concentration plants were determined respectively as Rumex patientia (Mamak), Lavandula angustifolia (Kizilcahamam), and Astragalus acikirensis (Polatli). The establishment and routine repetition of environmental radioactivity monitoring programs in each region are important for human and animal health, and the results of this study gain importance for Ankara and its surroundings in terms of environmental health.Item The Effects of Illumination on the Current Conduction Mechanisms of the Au/C20H12/N-Si Schottky Barrier Diode (SBD)(2023) Bengi, Seda; 0000-0002-3348-0712; HPH-9613-2023Using the I-V characteristics both in the dark and under varied illumination-intensities (50-250 mW.cm(-2)) by 50 mW.cm(-2) steps in the wide range bias-voltage (+/- 5 V), specific fundamental electrical and photo effects parameters of the Au/C20H12/n-Si SBD were examined. Due to the creation of electron-hole pairs and their drift in opposite directions under the influence of an electric field, the value of photocurrent in the reverse bias (I-ph) increases when illumination density is increased. The barrier height (Phi(B0)) tended to decrease due to the increase in photocurrent, while the diode's ideality factor (n) increased with increasing illumination intensity. Also, the Schottky structure's open-circuit voltage (V-oc), short circuit current (I-sc), filling factor (FF), and efficiency (eta) were determined to be 0.358 V, 95.5 mu A, 33%, and 0.028% under 50 mW.cm(-2), respectively. The R-s and R-sh values found using Ohm's law are a vital function of illumination and voltage which decrease with increasing illumination intensity. Additionally, using the forward bias I-V data and accounting for the bias dependent of the effective barrier height (Phi(e)) and ideality factor n(V) for different illumination intensities, the energy density distribution profile of surface states (N-ss) was obtained. According to these results, the organic interlayer consisting of C20H12 is light-sensitive and suitable for optoelectronic devices such as photodetectors and photodiodes.Item Rates of Weighted Statistical Convergence for A Generalization of Positive Linear Operators(2023) Ilbey, Reyhan Canatan; Dogru, OgunIn the present paper, some direct and inverse theorems relating to a generalization of positive linear operators are given. Also some rates of weighted statistical convergence are computed by means of a weighted modulus of continiuty.Item The Transnational Spread of Turkish Television Soap Operas(2014) Karlidag, Serpil; Bulut, Selda; J-2443-2015Turkish soap operas that are primarily popular in Turkic Republics, Middle East, and the Balkans have in recent years spread to different countries. With the entry into Ukrainian, Pakistani, Russian, and Chinese markets last year, tens of Turkish soap operas now reach their viewers in over 50 countries, and generate export revenues. Short-term return on investment, new communication technologies, Istanbul's ` magnetic nature attracting new talents' and different sociocultural forces and policies play key role in such extensive spread of Turkish TV series. As cultural commodities, TV series, while the images and identities they contain spread, reach at the same time new customers through geographical expansion, and increase the earnings of producers. Yet, the distribution of soap operas is important as much as their production. This requires focusing on the commodities with geo-linguistic and geo-cultural markets rather than companies producing these commodities. Therefore, demand for these non-Western commodities of different geographies points to a contra-flow. In a sense, while new media centers are emerging elsewhere other than the United States of America (USA)-Europe axis, it can be spoken of a regional opposition to the Western hegemony, though there is not an important historical leitmotive or transformation. Thus, in this study, relations between power, cultural commodity, and geography and the spread of Turkish soap operas in different geographies will be discussed with a political economic approach by also drawing attention to the historical commonality.Item A Novel Approach for Estimating Heat Transfer Coefficients of Ethylene Glycol-Water Mixtures(2014) Bulut, Murat; Ankishan, Haydar; Demircioglu, Erdem; Ari, Seckin; Sengul, Orhan; https://orcid.org/0000-0002-6240-2545; AAH-4421-2019Ethylene glycol-water mixtures (EGWM) are vital for cooling engines in automotive industry. Scarce information is available in the literature for estimating the heat transfer coefficients (HTC) of EGWM using knowledge-based estimation techniques such as adaptive neuro-fuzzy inference systems (ANFIS) and artificial neural networks (ANN) which offer nonlinear input-output mapping. In this paper, the supervised learning methods of ANFIS and ANN are exploited for estimating the experimentally determined HTC. This original research fulfills the preceding modeling efforts on thermal properties of EGWM and HTC applications in the literature. An experimental test setup is designed to compute HTC of mixture over a small circular aluminum heater surface, 9.5 mm in diameter, placed at the bottom 40-mm-wide wall of a rectangular channel 3 mm x 40 mm in cross section. Measurement data are utilized as the train and test data sets of the estimation process. Prediction results have shown that ANFIS provide more accurate and reliable approximations compared to ANN. ANFIS present correlation factor of 98.81 %, whereas ANN estimate 87.83 % accuracy for test samples.Item Daily Life Activities of Children during the Pandemic(2021) Yersel, Beyhan Ozge; Gunes, Luegen Ceren; Luegen, CerenThe aim of this descriptive study was to examine the views of parents with children between the ages of 3-6 on their children's daily life activities during the pandemic. The study sample was composed of 65 parents, among whom 60 were mothers, and five were fathers, who were selected with the snowball method and who had children between the ages of 3-6 and voluntarily participated in the study. The data were collected through the General Information Form and the Family Interview Form, which were developed in line with expert opinions. The collected data were analyzed using percentage and frequency values. The findings suggested that, during the pandemic, the children's family relationships were positively affected; the duration of using technological tools increased; the children started to wash their hands more carefully; and duration of activities, such as drawing and chores, and plays increased. It was also found that the children mostly preferred piece assembly games; their physical movement needs were not fully satisfied; and there was no change in their health conditions, self-care skills, diet, sleep patterns, interactive book reading, and purposes of using technology. In line with the findings, parents, experts were given specific recommendations.Item Is Empathy Important in Teaching Popular Culture?(2017) Raw, LaurenceItem The Representation of Trauma and Trauma Coping Strategies in Grace Nichols's I is a Long Memoried Woman(2017) Sarikaya Sen, Merve; 0000-0003-2091-2536; AEG-2545-2022Using the historical background of the Middle Passage and slavery and drawing on the tools provided by trauma studies, this study carries out a comprehensive analysis of Grace Nichols's I is a Long Memoried Woman (1983). The starting hypothesis explored in this study is that I is a Long Memoried Woman represents traumatic experiences of the Middle Passage and slavery as well as trauma coping strategies adopted by Afro-Caribbean slaves, especially black slave women. Accordingly, this study first delves into four main trauma representation strategies in I is a Long Memoried Woman: repression, haunting, repetition and traumatic pastoral. It then explores the representation of trauma coping strategies adopted by Afro-Caribbean peoples: return to religion and spirituality, dissociation, escape through imagination and revenge fantasies. In doing so, this study demonstrates that there is a possibility for trauma victims such as Afro-Caribbean peoples to heal their wounds and move on as represented in I is a Long Memoried Woman.Item An Alternative View of Ecotourism with a Specific Reference to Turkey(2016) Erdogan, Nazmiye; Erdogan, Irfan; 0000-0002-5588-0039; A-5267-2019Item The Effect of Thyroid Dysfunction on Nesfatin-1 And Adiponectin Levels in Rats(2017) Atici, Emine; Mogulkoc, Rasim; Baltaci, Abdulkerim Kasim; Menevse, Esma; 0000-0003-2461-1212; 0000-0002-5477-5667; 0000-0002-6547-4798; 28796641; AAL-5444-2020; ABA-7831-2020; AAG-5865-2019Background: Changes in thyroid hormone concentrations may affect adiponectin concentrations through various mechanisms. A molecule released primarily from the fat cells adiposities; adiponectin has important effects on the regulation of body weight. Aim: The present study aimed to explore the effects of experimental thyroid dysfunction and its treatment on nesfatin-1 and adiponectin levels in rats. Methods: The study included 40 adult male Sprague-Dawley rats which were grouped as follows: (1) control; (2) hypothyroidism [hypothyroidism was induced by intraperitoneal injection of 10 mg/kg/day propylthiouracil (PTU) for 3 weeks]; (3) hypothyroidism + thyroxine group [after hypothyroidism was induced by 2-week PTU injection, they were treated with high-dose L-thyroxine (1.5 mg/kg/day) for 1 week]; (4) hyperthyroidism [hyperthyroidism was induced by 3-weeks' thyroxine injection (0.3 mg/kg/day)]; (5) hyperthyroidism + PTU (after hyperthyroidism was induced by 2-weeks' thyroxine injection, the animals were given 10 mg/kg/day PTU for 1 week). Blood samples taken at the end of the study were analyzed to measure nesfatin-1 and adiponectin levels. Results: It was found that nesfatin-1 levels increased in hypothyroidism, while adiponectin levels decreased (p < 0.001). In experimental hyperthyroidism, on the other hand, both nesfatin-1 and adiponectin levels were found significantly elevated (p < 0.001). Conclusion: The results of the study indicate that nesfatin-1 and adiponectin levels were modified considerably in hypo- and hyperthyroidism, whereas with the restoration of the thyroid function, modified hormone levels went back to normal.