Hakkari Üniversitesi Akademik Veri Yönetim Sistemi
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Finish turning of toolox 33 to improve machining parameters with different nose radius tools
No full textSınıf Öğretmenliği Bölümü Öğrencilerinin Fiziksel Aktivite Düzeyleri ve Metabolik Sendrom Bilgi ve Farkındalık Düzeylerinin İncelenmesi
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مشكلات في واقع تعليم اللغة العربية للناطقين بغيرها / Yabancılara Arapça Öğretiminde Karşılaşılan Sorunlar
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Effect of Cutting Parameters on Temperature in Machining of 5115 Steel
No full textAISI 5115 is widely used in engineering applications such as manufacturing of shafts, gears,machine components and cutting tools due to high strength, toughness and machineability. Turning,milling and drilling operations are mostly preferred including heat treatments on AISI 5115. In this study,the effect of three key cutting parameters on the turning behavior of AISI 5115 steel was investigated. Afull factorial design with the variables of feed rate (0.1 and 0.15 mm/rev), depth of cut (0.2 and 0.3 mm)and, cutting speed (40 and 60 m/min) was employed. Turning operations were performed using CCMT-09T308-304 cutting tool at a machining length of 200 mm with eight samples under dry conditions.Experiments shows that the Maximum temperature is achieved on 0.15 mm/rev feed rate, 0.3 mm depthof cut and 60 m/min cutting speed. Reduction on cutting speed to 40 m/min results in decrease intemperature about 13 oC. Similarly, the temperature decreases on each sample with lower cutting speedwhen the feed rate and cutting speed is constant. The variation in feed rate from 0.1 to 0.15 mm/revshowed no noticeable effect on the temperature when the depth of cut and cutting speed were fixed at 0.2mm and 40 m/min, respectively. In addition, varying the depth of cut had little effect on the temperatureat a feed rate of 0.1 mm/rev; however, a significant increase in temperature was observed at a feed rate of0.15 mm/rev.</p
Türkiye’de Ekonomik Politika Belirsizliği ve Vergi Gelirleri Arasındaki İlişki: DOLS, FMOLS ve CCR Zaman Serisi Eşbütünleşme Yaklaşımı
No full textVergi gelirleri bir ülkede maliye politikalarının yürütülmesinde, kamu gelirleri içerisinde en önemli gelir kaynağı olarak gösterilmektedir. Vergi gelirlerinin pozitif ya da negatif yönde değişimi devletlerin ekonomik, sosyal, siyasi konjonktürlerinde farklı değişimler meydana getirebileceğinden vergi gelirleri devletler için büyük önem arz etmektedir. Öte yandan işletmeler açısından da önemli harcama kaynaklarından biri olan vergi, ekonomik ve politik etkenlerden önemli ölçüde etkilenebilmektedir. Bu etkenler dikkate alınarak yapılan bu çalışmada, Türkiye’de ekonomik politika belirsizliği ile toplam vergi gelirleri arasındaki ilişki araştırılmıştır. Belirsizlik ile vergi gelirleri arasındaki ilişki Johansen eşbütünleşme, DOLS, FMOLS ve CCR istatistiksel model analizleri ile test edilmiştir. Belirsizlik ve vergi gelirlerinin yanı sıra, oluşturulan ekonometrik modelde faiz, işsizlik oranı, döviz kuru ve sanayi üretim endeksi kontrol değişkeni olarak kullanılmıştır. Yapılan analizlerde değişkenlerin 2008Q1-2023Q4 dönemine ait çeyreklik zaman serisi verileri kullanılmıştır. Johansen testinde Türkiye’de toplam vergi gelirleri ile politik ve ekonomik belirsizlik arasında uzun dönemli bir eşbütünleşmenin olduğu ve DOLS, FMOLS ile CCR yöntemlerinden elde edilen regresyon katsayı sonuçlarında belirsizliğin toplam vergi gelirleri üzerinde önemli düzeyde azaltıcı bir etkiye sahip olduğu görülmüştür. Sonuç olarak, ekonomik politika belirsizliğinin, ekonomik sistemde oluşturduğu negatif etkiye bağlı olarak vergi gelirlerini azalttığı tespit edilmiştir.Tax revenues are considered the most significant source of public income when implementing fiscal policy within a country. Whether positive or negative, changes in tax revenue can lead to various shifts in states’ economic, social, and political dynamics, making tax revenues highly critical for governments. On the other hand, taxes, as a significant expenditure for businesses, can be substantially influenced by economic and political factors. Considering these factors, this study examines the relationship between economic policy uncertainty and total tax revenues in Türkiye. The relationship between uncertainty and tax revenues was tested using Johansen Cointegration, Dynamic Ordinary Least Squares (DOLS), Fully Modified Ordinary Least Squares (FMOLS), and Canonical Cointegrating Regression (CCR) statistical model analyses. In addition to uncertainty and tax revenue, the econometric model included interest rates, unemployment rates, exchange rates, and industrial production indices as control variables. The analysis utilised quarterly time series data spanning from 2008Q1 to 2023Q4. The Johansen test indicated a long-run cointegration relationship between total tax revenue and political and economic uncertainty in Türkiye. Furthermore, the regression coefficient results derived from DOLS, FMOLS and CCR methods revealed that uncertainty significantly reduces total tax revenues. In conclusion, the study found that economic policy uncertainty has a negative impact on tax revenues due to the adverse effects it creates within the economic system
Using the power card strategy to teach poison-prevention skills to children with developmental disabilities
No full textThe purpose of this study was to evaluate the power card strategy (PCS) in teaching children with developmental disabilities (DD) how to respond safely to the presence of cleaning chemicals. One female and two male participants with DD, aged 8–14, took part in the study, which was conducted using a multiple-probe-across-participants design. The study’s findings showed that the PCS was effective in teaching poison prevention skills to children with DD. All the participants were able to learn the target skill and maintain and generalize their learning. Social validity data were also collected from participants, their parents, and teachers. Social validity findings indicated that the opinions of the participants, their parents, and teachers were positive overall. Implications for instruction and future research are discussed based on the results of the study
