Browsing by Author "Yilmaz V."

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    Asthma control test via text messaging: Could it be a tool for evaluating asthma control?
    (2013) Uysal M.A.; Mungan D.; Yorgancioglu A.; Yildiz F.; Akgun M.; Gemicioglu B.; Turktas H.; Ozkan G.; Yilmaz I.; Incioglu M.; Boyaci H.; Atis S.; Yalcin A.; Bayram N.G.; Deveci F.; Pulur D.; Ozgur E.S.; Dursun B.; Bulbul Y.; Sulu E.; Yilmaz V.
    Introduction: Originally, the Asthma Control Test (ACT) was designed for English-speaking patients using a paper-and-pencil format. The Turkish version of the ACT was recently validated. This article compares the paper-and-pencil and web-based texting formats of the Turkish version of the ACT and evaluates the compatibility of these ACT scores with GINA-based physician assessments of asthma control. Methods: This multicentre prospective study included 431 asthma patients from outpatient clinics in Turkey. The patients were randomized into a paper-and-pencil group (n=220) and a text messaging group (n=211). Patients completed the ACT at Visit 1, after 10±2 days, and at 5±1 week to demonstrate the reliability and responsiveness of the test. At each visit, physicians assessed patients' asthma control levels. Results: The ACT administered via texting showed an internal consistency of 0.82. For the texting group, we found a significant correlation between the ACT and physician assessments at Visit 1 (r=0.60, p<0.001). The AUC was 0.87, with a sensitivity of 78.0% and a specificity of 77.5% for a score of ≤19 for screening "uncontrolled" asthma in the texting group. Conclusion: When the Turkish version of the ACT was administered via either the paper-and-pencil or text messaging test, scores were closely associated with physician assessments of asthma control. © 2013 Informa Healthcare USA, Inc.
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    Epidemiology and distribution of interstitial lung diseases in Turkey
    (2014) Musellim B.; Okumus G.; Uzaslan E.; Akgün M.; Cetinkaya E.; Turan O.; Akkoclu A.; Hazar A.; Kokturk N.; Calisir H.C.; Sever F.; Kiter G.; Celik G.; Bilgin S.; Kurutepe M.; Uzun O.; Tabak L.; Ozdemir O.; Turker H.; Ogus C.; Kiral N.; Ozkan M.; Yalniz E.; Camsari G.; Dogan T.; Yilmaz U.; Cildag O.; Yildiz F.; Hanta I.; Oztuna F.; Arik D.; Goktalay T.; Kanmaz D.; Yilmaz V.; Altiay G.; Komurcuoglu B.; Ozkan G.; Erbaycu A.; Dogrul M.I.; Ongen G.; Tuncay E.; Dabak G.; Sakar A.; Bircan A.; Uzel I.; Kalpaklioglu F.; Gülbay B; Bulbul Y.; Gulbanu H.; Havlucu Y.; Ekici Z.; Zamani A.; Caglayan B.; Kayacan O.; Dursunoglu N.
    Introduction: There is very few data on the epidemiological features of interstitial lung diseases (ILD) in the literature. These studies on this subject suffer from limited number of patients. Objective: The goal of this study was to evaluate the epidemiological features of ILD in Turkey. Methods: Fifty-four investigators, 31 centres in 19 cities from six regions of Turkey, participated in the study. Two thousand two hundred forty-five newly diagnosed patients (51.8% females), led by Turkish Thoracic Society Clinical Problems Study Group, enrolled in this prospective study. Results: The mean age was 51.8±16.7 years. The mean age among males was 50.5±18.6 years and 53.0±14.6 years among females (P<0.001). 23.8% of the cases had ILD with known causes, while 39.4% were in granulomatous group, 23.7% were idiopathic, and 4.4% were in the unclassified group. Overall, histopathologically confirmed diagnosis rate was 40.4%. Sarcoidosis was the most common disease (37%), whereas cases with idiopathic pulmonary fibrosis (IPF) constituted 19,9% of patients. 53% of the sarcoidosis patients were females, and the ratio reaches to 75% under 50 years of age (for this group, IPF ratio is %3). In contrast, sarcoidosis and IPF ratios were equal in males (25%). Sarcoidosis was 8% in men over 50, while IPF was %45. Conclusion: The overall incidence of ILD in Turkey was computed to be 25.8/100000. © 2013 John Wiley & Sons Ltd.
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    Analysis and optimisation of the cutting parameters based on machinability factors in turning AISI 4140 steel
    (Taylor and Francis Ltd., 2022) Özdemir M.; Şahinoğlu A.; Rafighi M.; Yilmaz V.
    AISI 4140 alloy steel has high abrasion resistance, toughness, torsional, and fatigue strength. Different types of this alloy with different hardness are used to manufacture gears, crankshafts, collars, jigs, and milling spindles. In this study, turning tests were carried out on AISI 4140 steel using coated carbide inserts considering Taguchi L9 orthogonal array at three different cutting speeds, feed rates, and cutting depths. The output parameters were selected as cutting forces, surface roughness, current and sound intensity. According to the ANOVA results, feed rate was the most effective parameter on the cutting force and surface roughness. As the feed rate increases, the cutting force and surface roughness value enhance. The feed rate was also the most important factor affecting the current with 81.61% contribution, followed by cutting depth with 12.67% contribution. The cutting depth with 66.95% contribution has the highest impact on the sound intensity. It was followed by a feed rate with 26.07% contribution. According to the optimisation results, the experimental and the estimated values ⁣⁣were significantly close to each other. © 2022 Canadian Institute of Mining, Metallurgy and Petroleum.