Browsing by Author "Demir, I"

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    Transverse Vibration Analysis of a Self-Excited Beam Subjected to Delayed Distributed and a Singular Load Using Differential Transformation Method
    Demir, I; Karahan, MMF; Aktürk, N
    PurposeIn this article, the transverse vibration motion of a self-excited beam which is subjected to a distributed and a singular load is analyzed using the differential transformation method (DTM).MethodsThe Euler-Bernoulli beam model is employed. The beam is modeled to represent the cutting tool holder motion in machining. A delayed distributed load and a vibration velocity-dependent singular load are considered as forcing. Analysis is performed for different time delays, widths of distributed load, and beam lengths in the time domain. The Laplace transform method is deployed for the stability analysis. Multi-step DTM is applied for the mathematical solution. Matlab (R) ddesd solutions is used for mathematical comparison.ResultsWhen the width of the distributed load increases and then the vibration amplitude increases. An increase in the beam length causes the amplitude to increase. The vibration amplitude increases as the delay time decreases. However, the reduction of some delay values reduces the amplitude.ConclusionThe equation that expresses the variation of the distributed load width with respect to the delay time is compatible results in accordance with the experimental studies in the literature. If beam length increases, the stability region of the width of the distributed load will decrease. The effect of beam length for stability can be adjusted by changing the time delay.
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    A Comparative Analysis of the Change of Kula Traditional Turkish Housing Architecture in The Last 50 Years
    Bas, GO; Demir, I
    Kula is a district rich in cultural values. There are many historical and traditional residences in this region. These historical structures have undergone great and different changes over time. It is aimed to determine the transformations related to facade, structural element, and interior use in traditional houses. In addition, by looking at the obtained data, namely the architectural changes, it was determined as a secondary purpose to make suggestions about conservation. The study consists of a combination of two basic methods: literature research and field research. After determining the subject of the study, written sources related to the subject were searched and the research was supported by field studies. The method of the study is the comparison of the data obtained from the sources and the evidence in the field study. Findings were obtained by analyzing the detected differences. In the study, which was carried out with the comparative analysis method, the historical process was examined, and information, architectural drawings and photographs were obtained about the conditions of the buildings 50 years ago. For this reason, scope of the study consists of both the data obtained and the houses that provide both conditions depending on the availability of these data today. In this context, the study is limited to 14 traditional Turkish residences in the Kula site, from which both historical data and locations can be accessed. In the studies carried out in the field of architectural restoration and conservation, the current situations are examined in the studies on conservation. However, in this study, not only the current situation of the buildings, but also the conditions of the previous years and even the comparison of the data was obtained. Although this study was carried out within the scope of Kula district, it gives an idea about the change and usage of interiors of the residences.
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    The prevalence of childhood psychopathology in Turkey: a cross-sectional multicenter nationwide study (EPICPAT-T)
    Ercan, ES; Polanczyk, G; Ardic, UA; Yuce, D; Karacetin, G; Tufan, AE; Tural, U; Aksu, H; Aktepei, E; Arman, AR; Basgülk, S; Bilac, O; CosKunm, M; Celik, GG; Demirkaya, SK; Dursun, BO; Durukan, I; Fidan, T; Fis, NP; Gençoglan, S; Gökçen, C; Görker, I; Görmez, V; Gündogdu, OY; Gurkan, CK; Hergüner, S; Hesapçioglu, ST; Kandemir, H; Kiliç, BG; Kilinçaslan, A; Mutluer, T; Nasiroglu, S; Özcan, ÖÖ; Öztürk, M; Öztop, D; Sapmad, SY; Süren, S; Sahin, N; Tahiroglu, AY; Toros, F; Ünal, F; Vural, P; Yazici, IP; Yazici, KU; Yildirim, V; Yulaf, Y; Yüce, M; Yüksel, T; Akdemir, D; Altun, H; Ayik, B; Bilgic, A; Bozkurt, ÖH; Çakir, ED; Çeri, V; Demir, NÜ; Dinç, G; Irmak, MY; Karaman, D; Kinik, MF; Mazlum, B; Memik, NÇ; Özdemir, DF; Sinir, H; Tasdelen, BI; Taskin, B; Ugur, Ç; Uran, P; Uysal, T; Üneri, Ö; Yilmaz, S; Yilmaz, SS; Açikel, B; Aktas, H; Alaca, R; Aliç, BG; Almaidan, M; Ari, FP; Aslan, C; Atabay, E; Ay, MG; Aydemir, H; Ayranci, G; Babadagi, Z; Bayar, H; Bayhan, PÇ; Bayram, Ö; Bektas, ND; Berberoglu, KK; Bostan, R; Canli, MA; Cansiz, MA; Ceylan, C; Coskun, N; Coskun, S; Çakan, Y; Demir, I; Demir, N; Demirdögen, EY; Dogan, B; Dönmez, YE; Dönder, F; Efe, A; Eray, S; Erbilgin, S; Erden, S; Ersoy, EG; Eseroglu, T; Firat, SK; Gök, EE; Güler, G; Güles, Z; Günes, S; Günes, A; Günay, G; Özgür, BG; Güven, G; Goksoy, SC; Horozcu, H; Irmak, A; Isik, U; Kahraman, Ö; Kalayci, BM; Karaaslan, U; Karadag, M; Kilic, HT; Kiliçaslan, F; Kinay, D; Kocael, O; Koç, EB; Mutlu, RK; Lushi-San, Z; Nalbant, K; Okumus, N; Özbek, F; Özdemir, FA; Özdemir, H; Özkan, S; Özyurt, EY; Polat, B; Polat, H; Sekmen, E; Sertçelik, M; Sevgen, FH; Sevince, O; Süleyman, F; Shamkhalova, Ü; Simsek, NE; Tanir, Y; Tekden, M; Temtek, S; Topal, M; Topal, Z; Türk, T; Uçar, HN; Uçar, F; Uygun, D; Uzun, N; Vatansever, Z; Yazgili, NG; Yildiz, DM; Yildiz, N
    Aim: The aim of this study was to determine the prevalence of childhood psychopathologies in Turkey. Method: A nation-wide, randomly selected, representative population of 5830 children (6-13 years-old) enrolled as a 2nd,3rd or 4th grade student in 30 cities were evaluated for presence of a psychiatric or mental disorder by a Sociodemographic Form, Kiddie Schedule for Affective Disorders and Schizophrenia for School Age Children-Present and Lifetime Version (K-SADS-PL), and DSM-IV-Based Screening Scale for Disruptive Behavior Disorders in Children and Adolescents scales. Impairment criterion was assessed via a 3 point-Likert scale by the parent and the teacher independently. Results: Overall prevalence of any psychopathology was 37.6% without impairment criterion, and 17.1% with impairment criterion. Attention-deficit hyperactivity disorder was the most frequent diagnosis, followed by anxiety (19.5% and 16.7% without impairment, 12.4% and 5.3% with impairment, respectively). Lower education level and presence of a physical or psychiatric problem of the parents were independent predictors of any psychopathology of the offspring. Conclusion: This is the largest and most comprehensive epidemiological study to determine the prevalence of psychopathologies in children and adolescents in Turkey. Our results partly higher than, and partly comparable to previous national and international studies. It also contributes to the literature by determining the independent predictors of psychopathologies in this age group.
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    Prevalence of Childhood Affective disorders in Turkey: An epidemiological study
    Karacetin, G; Arman, AR; Fis, NP; Demirci, E; Ozmen, S; Hesapcioglu, ST; Oztop, D; Tufan, AE; Tural, U; Aktepe, E; Aksu, H; Ardic, UA; Basgul, S; Bilac, O; Coskun, M; Celik, GG; Demirkaya, SK; Dursun, OB; Durukan, I; Fidan, T; Gencoglan, S; Gokcen, C; Gokten, ES; Gorker, I; Gormez, V; Gundogdu, OY; Gurkan, CK; Herguner, S; Kandemir, H; Kilic, BG; Kilincaslan, A; Mutluer, T; Nasiroglu, S; Ozcan, OO; Ozturk, M; Sapmaz, SY; Suren, S; Sahin, N; Tahiroglu, AY; Toros, F; Unal, F; Vural, P; Yazici, IP; Yazici, KU; Yildirim, V; Yulaf, Y; Yuce, M; Yuksel, T; Akdemir, D; Altun, H; Ayik, B; Bilgic, A; Bozkurt, OH; Cakir, ED; Ceri, V; Demir, NU; Dinc, G; Irmak, MY; Karaman, D; Kinik, MF; Mazlum, B; Memik, NC; Ozdemir, DF; Sinir, H; Tasdelen, BI; Taskin, B; Ugur, C; Uran, P; Uysal, T; Uneri, OS; Yilmaz, S; Yilmaz, SS; Acikel, B; Aktas, H; Alaca, R; Alic, BG; Almbaidheen, M; Ari, FP; Aslan, C; Atabay, E; Ay, MG; Aydemir, H; Ayranci, G; Babadagi, Z; Bayar, H; Bayhan, PC; Bayram, O; Bektas, ND; Berberoglu, KK; Bostan, R; Cakan, Y; Canli, MA; Cansiz, MA; Ceylan, C; Coskun, N; Coskun, S; Demir, I; Demir, N; Demirdogen, EY; Dogan, B; Donmez, YE; Donder, F; Efe, A; Eray, S; Erbilgin, S; Erden, S; Ersoy, EG; Eseroglu, T; Firat, SK; Gok, EE; Goksoy, SC; Guler, G; Gules, Z; Gunay, G; Gunes, S; Gunes, A; Guven, G; Horozcu, H; Irmak, A; Isik, U; Kahraman, O; Kalayci, BM; Karaaslan, U; Karadag, M; Kilic, HT; Kilicaslan, F; Kinay, D; Koc, EB; Kocael, O; Mutlu, RK; San, Z; Nalbant, K; Okumus, N; Ozbek, F; Ozdemir, FA; Ozdemir, H; Ozgur, BG; Ozkan, S; Ozyurt, EY; Polat, B; Polat, H; Sekmen, E; Sertcelik, M; Sevgen, FH; Sevince, O; Shamkhalova, U; Suleyman, F; Simsek, NE; Tanir, Y; Tekden, M; Temtek, S; Topal, M; Topal, Z; Turk, T; Ucar, HN; Ucar, F; Uygun, D; Uzun, N; Vatansever, Z; Yazgili, NG; Yildiz, DM; Yildiz, N; Ercan, ES
    Aim: To determine the prevalence of affective disorders in Turkey among a representative sample of Turkish population. Methods: This study was conducted as a part of the The Epidemiology of Childhood Psychopathology in Turkey (EPICPAT-T) Study, which was designed by the Turkish Association of Child and Adolescent Mental Health. The inclusion criterion was being a student between the second and fourth grades in the schools assigned as study centers. The assessment tools used were the K-SADS-PL, and a sociodemographic form that was designed by the authors. Impairment was assessed via a 3 point-Likert type scale independently rated by a parent and a teacher. Results: A total of 5842 participants were included in the analyses. The prevalence of affective disorders was 2.5 % without considering impairment and 1.6 % when impairment was taken into account. In our sample, the diagnosis of bipolar disorder was lacking, thus depressive disorders constituted all the cases. Among depressive disorders with impairment, major depressive disorder (MDD) (prevalence of 1.06%) was the most common, followed by dysthymia (prevalence of 0.2%), adjustment disorder with depressive features (prevalence of 0.17%), and depressive disorder-NOS (prevalence of 0.14%). There were no statistically significant gender differences for depression. Maternal psychopathology and paternal physical illness were predictors of affective disorders with pervasive impairment. Conclusion: MDD was the most common depressive disorder among Turkish children in this nationwide epidemiological study. This highlights the severe nature of depression and the importance of early interventions. Populations with maternal psychopathology and paternal physical illness may be the most appropriate targets for interventions to prevent and treat depression in children and adolescents.