92 research outputs found
Recent Turkish coin hoards and numismatic studies /
No full textIncludes bibliographies and index.The coinage of Ancyra in the Roman period ; The Taburabat hoard ; The Kargi hoard of Rhodian plinthophoroi / Melih Arslan -- Rhodian coinage in the early imperial period (Ch 3 : no. 82) / R.H.J. Ashton -- The Haydere hoard and other hoards of the mid-third century from Turkey / Roger Bland and Pinar Aydemir -- Some Cilician coins in the Hatay Museum / Kevin Butcher -- C. Atinius C.f. on a coin of Ephesus / David French -- The Polatli hoard / M. Tevfik Göktürk -- The Sulakyurt hoard ; The Yatağan hoard / Yildiz Kizilkaya -- The Herakleia hoard / Osman Özbek -- The Tigris-Euphrates Archaeological Reconnaissance Project numismatic notes / Mehmet Söylemez and C.S. Lightfoot -- The Coinage of Ancyra : addenda / Melih Arslan
THE RELATIONSHIP BETWEEN TEST ANXIETY AND STUDENTS' ACHIEVEMENT IN ATATURK'S PRINCIPLES AND REVOLUTION COURSE
No full textThis article is concerned with the study of relationship between the test anxiety and students' achievement in the course on Ataturk's Revolutions and Principles. The participants of this study consist of 245 students from Faculty of Letters and Polatli Technical Vocational School at Hacettepe University. The relationship between the level of test anxiety and students' achievement is examined and it is found out that there is no connection between the test anxiety and age and gender. However, the findings of this study support the findings of similar studies. It is possible to indicate that the methods and techniques that the lecturers use in this course positively affect the students' anxiety and thus achievement
Solar-energy potential in Turkey
No full textIn this study, a new formula based on meteorological and geographical data was developed to determine the solar-energy potential in Turkey using artificial neural-networks (ANNs). Scaled conjugate gradient (SCG) and Levenberg-Marquardt (LM) learning algorithms and a logistic sigmoid transfer function were used in the network. Meteorological data for the last four years (2000Â -->Â 2003) from 18 cities (Bilecik, KIrsehir, Akhisar, Bingöl, Batman, Bodrum, Uzunköprü, Sile, BartIn, Yalova, Horasan, PolatlI, Malazgirt, Köycegiz, Manavgat, Dörtyol, Karatas and Birecik) spread over Turkey were used as data in order to train the neural network. Meteorological and geographical data (latitude, longitude, altitude, month, mean sunshine duration, and mean temperature) were used in the input layer of the network. Solar radiation is the output layer. One-month test data for each city was used, and these months data were not used for training. The results show that the maximum mean absolute percentage error (MAPE) was found to be 3.448% and the R2 value 0.9987 for PolatlI. The best approach was found for KIrsehir (MAPE=1.2257, R2=0.9998). The MAPE and R2 for the testing data were 3.3477 and 0.998534, respectively. The ANN models show greater accuracy for evaluating solar-resource possibilities in regions where a network of monitoring stations has not been established in Turkey. This study confirms the ability of the ANN to predict solar-radiation values precisely.Solar-energy potential City Turkey Artificial neural-network Formulation
Nonlinear analysis of electrodermal activity signals for healthy subjects and patients with chronic obstructive pulmonary disease
No full textInvestigating the effects of afforestation efforts on some soil properties in semi-arid lands: A case study in Polatli (Sarioba)
No full textYÖK Tez No: 287525Ülkemiz arazilerinin aşırı ve yanlış kullanımları sonucunda özellikle bitki örtüsü ve toprak kaynakları tahrip edilmiş, verimsizleşmiş ve hatta çoraklaşmış birçok alan oluşmuştur. Bunun yanında, iklimsel, topoğrafik ve sosyo-ekonomik zorlukların ve kısıtlamaların bulunduğu bölgelerde oluşan bu arazi tahribatı daha da ciddi boyutlara ulaşmaktadır. Örneğin İç Anadolu Bölgesi, aşırı ve yanlış kullanımların yoğun olarak yaşandığı bir bölgedir ancak sahip olduğu yarı-kurak iklim bu bölgedeki tahrip derecesini daha da arttırmıştır. Bu tip alanlarda bitki örtüsünün tekrar oluşturulması ve bozulan toprak özelliklerinin iyileştirilmesi amacı ile uzun yıllardır ağaçlandırma projeleri ve çalışmaları yürütülmektedir. Ancak bu ağaçlandırma çalışmalarının özellikle toprak karakteristikleri üzerinde olumlu etkisinin olup olmadığı konusunda bilimsel araştırmalar oldukça eksiktir. Bu çalışmada, Ankara İli Polatlı ilçesi Sarıoba Köyü'nde önceleri mera olarak kullanılan ancak aşırı ve ağır otlatma sonucu üzerinde oluşan toprak erozyonu ile bozulan arazide yapılan ağaçlandırma çalışmalarının toprak özellikleri üzerine etkisi araştırılmıştır. Bu amaçla, 1997 yılında üzerinde ağaçlandırma yapılan ve aynı bölgede üzerinde ağaçlandırma yapılmayan iki alandan 0-30/30-60/60-90 cm derinliklerden 3'er adet olmak üzere, tesadüfî örnekleme yöntemine göre alınan 60 adet toprak örneği tekstür, organik madde, pH, kireç, azot, fosfor, EC, tarla kapasitesi, solma noktası ve faydalanılabilir su açısından analiz edilmiştir. Analiz sonuçları ağaçlandırma yapılan alandaki toprakların genel anlamda daha iyi özellikler içerdiğini ortaya koymuştur. Ağaçlandırılan alandaki topraklarda organik madde, fosfor, kil, azot, tarla kapasitesi, toz, solma noktası, faydalanılabilir su miktarı daha yüksekken ağaçlandırılmayan alandaki topraklarda ise pH, kum, kireç değerleri daha yüksek bulunmuştur.Overuse and misuse of the lands in Turkey have resulted in many areas having damaged vegetation cover and soil resources or unproductive and even barren lands. In addition, when some other difficulties or limitations such as climatic, topographic and socio-economic factors are present in these areas, the degree of the damage may reach more serious stages. For example, Central Anatolia Region is a region where heavy misuse and overuse of lands have been happening but with the addition of region?s semi-arid climatic conditions, the degree of damage has been increased. Reforestation projects and efforts have been applied in these damaged areas for long time to reestablish vegetation cover and improve degraded soil properties. However, there is a lack of scientific research whether or not these reforestation efforts have any positive effects especially on soil characteristics. In this study, a land previously used for pasturing and damaged by soil erosion due to over- and heavy-grazing in the Sarıoba Village in Polatlı, Ankara was investigated in order to determine if reforestation efforts have any positive effects on soil properties. With this goal, 60 soil samples were taken with random sampling at 0-30/30-60/60-90 cm depths in two areas, one with forestation efforts were taken place in 1997 and the other without any treatment. Soil samples were analyzed for texture, organic matter, pH, lime, nitrogen, phosphorus, EC, field capacity, wilting point, bulk density and water value. Results indicated that in general the area with forestation efforts have better soil properties than the non-treated area. While high amount of organic matter, clay, nitrogen, field capacity, dust, wilting point, and utilizable water were recorded for the reforested area, the non-treated area had higher pH, sand, lime, and bulk density values
DNA investigation in the exhaled breath condensate (EBC) in non-small cell lung cancer
No full textAim: Exhaled breath condensate (EBC), one of the materials which is used to detect mutations in the early period, is collected by completely non-invasive a technique which has no risk for the patient. We aimed to investigate whether EBC samples are suitable for the detection of DNA or not in non-small cell lung cancer (NSCLC) and control patients.
Methods: 26 patients with NSCLC and 20 patients without lung cancer were included in the study. EBC procedure was performed by the help of Eco Screen- Jaeger device in 10-15 minutes during breathing at the tidal volume. DNA was isolated using tissue spin-column DNA isolation kit in the collected EBC.
Results: DNA amount was twofold high in the NSCLC group than non-cancer patients in spite of short time (p>0.05). However, in cancer group DNA amount was found lower in patients with endobronchial lesions than without endobronchial lesions (p>0.05). Although, there was no relationship between DNA amount and all of EBC collection time, collected sample amount and expiration air volume in the cancer group, a positive relations was detected between DNA amount and EBC collection time in the non-cancer group.
Conclusıon: This may be explained by the pathological changes which occur at the cellular level in the lungs during cancer development process. However, it may also result from relative decrease which develops from redundancy of EBC volume in the non-cancer group. The source of DNA in EBC may be considered to be pathological changes resulting from the systemic inflammatory response, apart from the localized lesion in the lungs
POLATLI (GB ANKARA) GÜNEYİ MONSİYEN-KÜİZİYEN İSTİFİNİN OSTRAKOD BİYOSTRATİGRAFİSİ VE ORTAMSAL YORUMU
No full textÇalışmada, Polatlı ilçesinin güneyinde yüzeyleyen Alt Paleojen yaşlı sedimanter kayaçların ostrakod faunası stratigra
açıdan değerlendirilerek biyozonlara ayırtlanmakta, kronostratigrafik ve ortamsal açılardan yorumlanmaktadır. Araştırmanın
trakod ürünü olarak saptanmış 44 türün stratigrafik dağılımından, bölgede Monsiyen-Küiziyen aralığında aort biyozon önerilir
ostrakodlarla bölge Tersiyer istifinin başlangıçta karasal, sonra denizel bir ortamda çökeldiği belirlenmiştir
Anthropometric Methods in Evaluation of Chronic Obstructive Pulmonary Disease
No full textChronic Obstructive Pulmonary Disease (COPD) is mainly expressed by weight loss with especially fat-free mass (FFM) depletion and a low body weight correlates with increased mortality and a poor prognosis. We investigated whether anthropometric body composition equations could be used for evaluation of the body composition in COPD. Thirty clinically stable patients with COPD and 13 healthy age matched control subjects underwent the skinfolds and circumference measurements in addition to body mass index (BMI) calculations. Body fat mass (BFM) and FFM were determined by using anthropometric equations. The percent BFM, predicted from body density either using Siri’sor Brozek’sequations was determined lower than that of calculated with equations by using BMI, age and gender. The values of BFM and body weight were reduced in patients with FEV
THE OSTRACODA BIO STRATIGRAPHY AND ENVIRONMENTAL INTERPRETATION OF THE MONTIAN-CUISIAN SEQUENCE IN THE SOUTH OF POLATLI (SW ANKARA)
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