Gazi Hastanesi

Abstract For any n and l values, we present a simple exact analytical solution of the radial Schrödinger equation for the Kratzer potential within the framework of the asymptotic iteration method (AIM). The exact bound‐state energy eigenvalues ( E nl ) and corresponding eigenfunctions ( R nl ) are calculated for various values of n and l quantum numbers for CO, NO, O 2 , and I 2 diatomic molecules. © 2006 Wiley Periodicals, Inc. Int J Quantum Chem, 2007

Bu çalışmanın amacı, Brown, Miller ve Lawendowski (1999) tarafından davranışsal öz-düzenlemeyi ölçmek amacıyla geliştirilmiş olan Öz-Düzenleme Ölçeği’ni Türkçeye uyarlamak, geçerlik ve güvenirlik çalışmasını yapmaktır. Araştırmanın çalışma grubunu Gazi Üniversitesi, Gazi Eğitim Fakültesi’nde öğrenim görmekte olan 591 öğrenci oluşturmaktadır. Öncelikle ölçeğin Türkçeye uyarlama çalışmaları gerçekleştirilmiş ve çalışma grubundan elde edilen veriler üzerinde ölçeğin geçerliği ve güvenirliği için gerekli istatistiksel analizler yapılmıştır. Ölçeğin yapı geçerliğine kanıt sağlamak amacıyla yapılan açımlayıcı faktör analizi sonucunda üç faktörlü 51 maddeden oluşan ölçek elde edilmiştir. Madde geçerliğine kanıt olarak da alt ve üst grup ortalamaları farkına dayalı madde analizi yapılmıştır. Ölçeğin güvenirliğini test etmek için hesaplanan iç tutarlık katsayısı Cronbach alfa değeri (α) ,87 olarak bulunmuştur. Elde edilen bulgular ölçeğin Türkçeye uyarlanmış formunun ülkemizde kullanılabilir, geçerlik ve güvenirlikte olduğunu göstermektedir.

Tea has been a very popular beverage around the world for centuries. The reason that it is delicious, enabling hydration, showing warming and relaxing effect can be mentioned why it is consumed so much in addition to its prominent health effects. Although the catechins and caffeine are the primary bioactive components that are related with the health effects of the tea, the health effects of theanine amino acid, which is a nonproteinic amino acid special to tea, has become prominent in recent years. It has been known that the theanine amino acid in tea has positive effects especially on relaxing, cognitive performance, emotional status, sleep quality, cancer, cardiovascular diseases, obesity, and common cold. The results of acute and chronic toxicity tests conducted on the safety of theanine express that L-theanine is reliable in general even if it is consumed too much with diet. However, it has not revealed a clear evidence-based result yet regarding theanine metabolism, health effects, and its safety. Within this frame, chemical structure of theanine, its biosynthesis, dietary sources, metabolism, health effects, and safety are discussed in present study.

Variations of intrinsic water-use efficiency during the last century were investigated based on analysis of δ13C in tree rings of Abies alba from the Jura Mountains (eastern France). To separate the effects related to the age of the tree at the time the tree ring was formed from effects due to environmental changes, analyzed wood samples were extracted from a very large sample set including different tree ages and calendar dates of wood formation. For the first 75 yr of the life of Abies alba, δ13C of wood holocellulose increases with the age of the tree from −24.4‰ at age 15 to approximately −22.5‰ at age 75. Between the ages of 75 and 150 values remain constant at −22.5‰. Consequently, the effect of the tree age on isotopic discrimination has to be taken into account in studies on the long-term environmental effects on δ13C in tree rings. Divergent trends of δ13C during the last century were observed between tree rings formed at age 40 and bulk air data. The isotopic discrimination Δ varied insignificantly around a mean of 17.3‰ between the 1860s and the 1930s. It then decreased to 15.8‰ from the 1930s to the 1980s. Using these results and classical models of carbon discrimination, we calculated that the intrinsic water-use efficiency (A/gw, the ratio of CO2 assimilation rate to stomatal conductance for water vapor), integrated over the year, has increased by 30% between the 1930s and the 1980s. These results, obtained at the level of mature trees, are consistent with the physiological effects of increasing CO2 concentrations as observed in controlled experiments on young seedlings. They are consistent with the strong increases in radial growth observed for Abies alba in western Europe over the past decades. However, other long-term environmental changes such as increasing nitrogen deposition could cause similar effects.

OBJECTIVES: We aimed to assess the efficacy of greater occipital nerve (GON) blockade at chronic migraine (CM) treatment. MATERIALS AND METHODS: Patients with CM were randomly divided into two groups of 42. GON blockade was administered four times (once per week) with saline in group A or bupivacaine in group B. After 4 weeks of treatment, blinding was removed; in group A, GON blockade was achieved using bupivacaine, while group B continued to receive bupivacaine, and blockade was administered once per month, then followed for 2 months. Primary endpoint was the difference in number of headache days, duration of headache, and pain scores. RESULTS: Seventy-two of 84 patients completed the study. After 1 month of treatment, number of headache days had decreased from 16.9 ± 5.7 to 13.2 ± 6.7 in group A (P = 0.035) and from 18.1 ± 5.3 to 8.8 ± 4.8 in group B (P < 0.001), (P = 0.004, between groups); duration of headache (hour) had decreased from 24.2 ± 13.7 to 21.2 ± 13.4 in group A (P = 0.223) and from 25.9 ± 16.3 to 19.3 ± 11.5 in group B (P < 0.001), (P = 0.767, between groups). VAS score decreased from 8.1 ± 0.9 to 6.7 ± 1.6 in group A (P = 0.002) and from 8.4 ± 1.5 to 5.3 ± 2.1 in group B (P < 0.001), (P = 0.004, between groups). After blinding was removed (in 2nd and 3rd month), group A exhibited similar results like group B in 3rd month. CONCLUSIONS: Our results suggest that GON blockade with bupivacaine was superior to placebo and was found to be effective, safe, and cost-effective for the treatment of CM. According to our knowledge, this is the first randomized, multicentre, double-blind, and placebo-controlled study in the literature in this field of work.

AbstractResearch indicates that information sharing and conversational uses of online media by journalists, news organizations, and individual users render complex and networked social awareness systems that evolve beyond traditional ecologies of journalism. This essay examines the form of news "prodused" through networked platforms that converge broadcast and oral traditions of storytelling into contemporary news practices. Synthesizing existing research, I argue that the shape news takes on is affective, the form of production is hybrid, and that spaces produced discursively through news storytelling frequently function as electronic elsewheres, or as social spaces that support marginalized and liminal viewpoints. Affective news streams are defined as news collaboratively constructed out of subjective experience, opinion, and emotion all sustained by and sustaining ambient news environments. They provide liminal layers to storytelling, but also a way for storytelling audiences to feel their own place into a developing news story.KEYWORDS: affective newshybridityjournalismnetworked journalismnewsnews storytellingsocial media Notes1. For more on homophily, see Lazarsfeld and Merton (Citation1954) or McPherson, Smith-Lovin, and Cook (Citation2001). For a more focused analysis on how homophily drives information sharing, structures of influence, and behavioral contagion or information cascades, see, for example, Aral, Muchnik, and Sundararajan (Citation2009) or Watts (Citation2002).

The full potential of e-learning, a trend that is of growing importance lately, will not be reaped unless the users fully utilize the system, triggering extensive research to be conducted in order to provide valuable insight on a myriad of variables influencing user acceptance in e-learning systems. The main purpose of the study is to determine the factors that affect the intention of users to use e-learning and to get results which can guide system developers and researchers. In accordance with this purpose, 203 studies investigating the e-learning acceptance of the users through the Technology Acceptance Model (TAM) were found in the literature. In those studies, variables which are suggested to determine Perceived Usefulness (PU) and Perceived Ease of Use (PEOU) and results of related hypotheses are analyzed. Finally, a model is proposed. In this model, the most widely accepted hypotheses, affecting PU and PEOU according to the literature are included in the original TAM. As a result; it determines Self Efficacy-PEOU, Subjective Norm-PU, Self Efficacy-PU, Interaction-PU, Enjoyment-PEOU, Anxiety-PEOU, Enjoyment-PU, Compatibility-PU, Subjective Norm-PEOU and Interaction-PEOU as variables that have statistical significance in users' PU and PEOU, respectively. Moreover, the study examines the relationship between the User Satisfaction and original TAM variables, and proposes the Acceptance and Satisfaction Model for E-Learning (ASME) as a model to best explain the dependent variables described above.

We investigate high-dimensional non-convex penalized regression, where the number of covariates may grow at an exponential rate. Although recent asymptotic theory established that there exists a local minimum possessing the oracle property under general conditions, it is still largely an open problem how to identify the oracle estimator among potentially multiple local minima. There are two main obstacles: (1) due to the presence of multiple minima, the solution path is nonunique and is not guaranteed to contain the oracle estimator; (2) even if a solution path is known to contain the oracle estimator, the optimal tuning parameter depends on many unknown factors and is hard to estimate. To address these two challenging issues, we first prove that an easy-to-calculate calibrated CCCP algorithm produces a consistent solution path which contains the oracle estimator with probability approaching one. Furthermore, we propose a high-dimensional BIC criterion and show that it can be applied to the solution path to select the optimal tuning parameter which asymptotically identifies the oracle estimator. The theory for a general class of non-convex penalties in the ultra-high dimensional setup is established when the random errors follow the sub-Gaussian distribution. Monte Carlo studies confirm that the calibrated CCCP algorithm combined with the proposed high-dimensional BIC has desirable performance in identifying the underlying sparsity pattern for high-dimensional data analysis.

BACKGROUND: Since the introduction of isotretinoin to the market, many adverse psychiatric effects, including depression, anxiety and suicide attempts were reported. The aim of this study was to determine whether patients with acne who were treated with isotretinoin experienced significant increases in psychiatric symptoms over a 4-month period compared with patients who received topical acne therapy. METHODS: Seventy-eight acne patients were allocated either to isotretinoin treatment (study group) (n = 37) or to topical treatment (control group) (n = 41). Their psychological status was evaluated at the baseline, second and fourth months of the treatment. All patients were required to complete the dermatology life quality index (DLQI), the Hospital anxiety and depression (HAD) scale, and the beck depression inventory (BDI). RESULTS: The two groups were not different from each other in terms of DLQI, BDI, HAD-A, HAD-D and total HAD scores at baseline. However, at the end of the second month quality of life was more impaired in the topical treatment group compared to the isotretinoin group (P < 0.05), and there were no difference between two groups in terms of BDI, HAD-A, HAD-D, and total HAD scores (P > 0.05). At the end of fourth month quality of life and all psychological test scores had improved more in the isotretinoin group compared to topical treatment group (P < 0.05). CONCLUSION: Results of the present study indicate that there is no increase in depressive and anxiety symptoms in the isotretinoin treatment group compared to that in the topical group. Instead, successful treatment of acne seems to improve both depressive and anxiety symptoms and improve quality of life.

Diyabet; göz, böbrek ve kalp gibi organ ve sistemlere kalıcı hasar verebilen bir hastalıktır. Bazıromatolojik durumlar diyabet hastalarında daha sık görülmekte ve yaşam kalitesini olumsuzetkilemektedirler. Diyabetik keiroartropati, karpal tünel sendromu, Dupuytren kontraktürü veCharcot artropatisi bunlardan bazılarıdır. Bu romatolojik sorunların büyük bir kısmının glisemikkontrolün sağlanmasıyla durdurulabildiği gösterilmiştir. Bazı durumlarda ise cerrahi müdahalegerekir. Hekimlerin görevi; hastanın yaşamını olumsuz etkileyen bu sorunları tanıyabilmek vehastayı doğru tedavi seçeneğine yönlendirmektir

Abstract Minarets are very slender structures with an old existence. The historical ones are made of cut‐stone‐block masonry assembled in peripheral cylindrical wall with an interior helicoidal stair supported on a central core and on the wall. They are spread throughout the Islamic world and constitute an important heritage not only of religious value, but also of great cultural interest. Throughout the times, these structures as part of a mosque, have suffered significant damage during the earthquakes. Istanbul presents interesting characteristics to evaluate their dynamic behavior, as they are in great number, in an area where a large event in the next 30 years has been predicted. In this paper, we performed a series of in situ ambient vibration tests to old minarets of various sizes and compared results of frequencies with numerical modeling of the same structures. For the low‐amplitude motion, the frequency values of the first modes can be obtained from an empirical formulae function of the inertia of the cross‐section and of the height of the main ‘body.’ Damping ratios for these amplitudes are of the order of 0.5–1.0%. Dynamic linear analyses of these structures indicate that for most cases very high stresses develop for PGA above 0.5 g , an input with a reasonable chance of occurring in the next 30 years. These high stresses are expected to cause the toppling of the minarets in the form that has been observed in the recent past events. Copyright © 2011 John Wiley &amp; Sons, Ltd.

Bu araştırmada sağlıklı beslenmeye ilişkin tutum ölçeğinin geçerli ve güvenilir olarak geliştirilmesi amaçlanmıştır. Araştırma, 2018-2019 eğitim-öğretim yılında öğrenim gören 573 üniversite öğrencisi üzerinde yürütülmüştür. Açımlayıcı Faktör Analizi sonucunda, toplam varyansın % 57,79’unu açıklayan, 21 madde ve 4 faktörden oluşan bir yapı elde edilmiştir. Bu faktörler, Beslenme Hakkında Bilgi (BHB), Beslenmeye Yönelik Duygu (BYD), Olumlu Beslenme (OB) ve Kötü Beslenme (KB) olarak adlandırılmıştır. Doğrulayıcı faktör analizi sonucunda ölçeğin yeterli uyum indekslerine sahip olduğu kanıtlanmıştır. Ölçeğin güvenirliği iç tutarlılık katsayısı ve test tekrar test yöntemiyle incelenmiş, hesaplanan güvenirlik katsayılarının kabul edilebilir sınırlar içerisinde yer aldığı belirlenmiştir. Madde analizi sonucunda ölçekte yer alan maddelerin tamamının ayırt edici olduğu ortaya koyulmuştur. Sonuç olarak, Sağlıklı Beslenmeye İlişkin Tutum Ölçeği (SBİTÖ)’nin geçerli ve güvenilir bir ölçme aracı olduğu saptanmıştır.

The purposes of this study are to investigate the effects of an augmented reality application on students’ spatial ability and academic achievement, and to analyze the opinions of students and their teacher concerning augmented reality environments. To collect quantitative data, a quasi-experimental pretest-posttest with a control group design was employed, and to collect qualitative data, a case study design was used. The study was designed around the lesson topic “geometric objects and measuring volume,” and 88 sixth grade students participated. While the students in the experimental group studied the lesson topic using augmented reality and real objects, the students in the control group used only real objects. The results indicate that though a significant increase was observed in the spatial ability of both groups, no significant difference was found between the post-test spatial ability mean scores of the experimental and control groups. In addition to the spatial ability results, the students’ academic achievement scores in the experimental group significantly increased, but the small increase in the control group students’ scores was not significant. No significant difference was found between the post-test academic achievement scores of the experimental and control groups. In addition to the quantitative data, the qualitative data gathered from the students and the teacher yielded valuable information that may assist researchers who attempt to integrate augmented reality in education.

The aim of this study is to assess the need for orthodontic treatment in a Turkish school population and a group of population referred for orthodontic treatment. The study groups were 250 school children, 11-14 years of age, and 250 patients, 11-14 years of age, referred to the department of orthodontics. The Index of Orthodontic Treatment Need (IOTN) was used by two examiner in order to estimate the treatment need. The differences between the IOTN values for the boys and girls were also not statistically significant in both groups. When the dental health component of IOTN is considered, 38.8 per cent of Turkish school population showed great need treatment, 24.0 per cent moderate need treatment and slight or no need was 37.2 per cent. On the other hand, the referred population represented an 83.2 per cent great need treatment, 12.0 per cent moderate need treatment, 4.8 per cent no need treatment according to the DHC. The AC of IOTN in school population resulted in 4.8 per cent great need, 4.8 per cent moderate need, 90.4 per cent no need. These percentage were 36.8 per cent great need, 17.6 per cent moderate need, 45.2 per cent no need in referred population. Grade 8 was 28.8 per cent out of the 36.8 per cent great need percentage in referred population. Therefore, it can be concluded that the ectopic canines were the driving factor for the referred population.

Bilgi teknolojilerinde yüksek hızda yaşanan gelişmeler ve internet kullanımının çok yaygın hale gelmesi ile birlikte, çeşitli platformlarda biriken verinin çeşitliliği ve hacmi de artmıştır. Büyük veri kavramı ile ifade edilen bu verilerin işlenmesi ve anlamlı bilgilerin elde edilmesi, önemli sonuçlar elde edilebilmesine imkân vermektedir. Bu çalışmada, büyük veri analizinde yapay zekâ ve makine öğrenmesi tekniklerinin kullanımı tartışılmıştır. Başlıca yapay zekâ ve makine öğrenmesi teknikleri hakkında bilgiler verilerek, bu tekniklerin büyük verilerle yapılan uygulamalarından örnekler verilmiştir. Başlıca olarak; kümeleme, sınıflandırma, yapay sinir ağları, metin ve web madenciliği, fikir madenciliği ve duygu analizi alanlarında büyük verilerle yapılan çalışmalar anlatılmıştır.

PURPOSE: To report eyes with keratoconus that progressed during pregnancy. METHODS: Seven eyes of 4 patients with progression of keratoconus during pregnancy were included in this study. The mean age of patients and the mean follow-up duration were 29.3 years and 39 months, respectively. Progressive keratoconus was documented with changes in refraction, corneal topography, and rigid gas-permeable lens fitting pattern. Patients with accompanying systemic and ocular diseases associated with keratoconus, uncontrolled atopic disease, and eye rubbing were excluded. RESULTS: Mean increase in spherical equivalent refraction and simulated keratometry values were 1.4 ± 1.1 and 1.1 ± 0.8 diopters, respectively. In eyes wearing rigid gas-permeable lenses, increase in corneal apical touch and decrease in the base curve radius of the best-fitting contact lens were observed. CONCLUSIONS: Hormonal changes during pregnancy may affect corneal biomechanics negatively, and pregnancy may be a previously unrecognized risk factor for progression of keratoconus. To our knowledge, this is the first study showing pregnancy-induced keratoconus progression in patients with no accompanying disease.

2019’un sonunda Çin’in Hubei eyaleti Wuhan şehrinde ortaya çıkan ve yayılanSARS-CoV-2 virüsü sonucu meydana gelen COVID-19 pandemisihalen ciddi bir halk sağlığı problemi olarak etkisini sürdürmektedir. Virüsün yarasa kaynaklı olduğu düşünülmektedir. Hastalık damlacık ve temas yolu ile insandan insana bulaşmaktadır. İnkübasyon süresi ortalaması 4-5 gün (0-14 gün) olarak gösterilmiştir. En yaygın semptomları ateş, kuru öksürük ve nefes darlığıdır. Hastalık ileri yaş ve komorbid hastalığı olan kişilerde şiddetli ve mortal seyredebilmektedir. Erkeklerde daha fazla fatalite hızı gösterilmiştir. Fatalite hızı dünya genelinde %2-3 olarak değişmektedir. Yaş arttıkça fatalite hızı artmaktadır. Rutin BCG aşısı politikasının mortaliteyi azalttığı düşünülmektedir. Teşhis olası vakalarda virüsün solunum sekresyonlarında özel moleküler testlerle gösterilmesi ile konur. Klinik şüphe varlığında tedavi planlamasında akciğer grafisi ve bilgisayarlı tomografi gibi görüntüleme yöntemleri kullanılmaktadır. Esas olarak destekleyii ve ampirik tedavi uygulanmakta olup spesifik tedavisi ve aşısı henüz yoktur. İnsanların temasının azaltılması, kesin ve şüpheli vakaların izolasyonu ve bulaştan korunmak için kişisel koruyucu ekipmanların etkin kullanımı salgın ile mücadelede çok büyük öneme sahiptir.

OBJECTIVE: A comparison of psychiatric, psychological and somatic characteristics in specified subgroups of major depressive episodes (MDE). METHOD: In a stratified community sample of young adults investigated prospectively from age 20/21 to 40/41, we defined four MDE subgroups: i) DSM-IV melancholia or atypical depression (the 'combined group'), ii) pure melancholia, iii) pure atypical depression, and iv) unspecified MDE. RESULTS: The cumulative incidence rates of the four groups were 4.1%, 7.1%, 3.5% and 8.2% respectively. Women were over-represented in the combined and atypically depressed group. In 56 of 117 (47.9%) cases, melancholia was longitudinally associated with atypical MDE (n = 84) (OR = 11.9). CONCLUSION: Melancholic MDE was more severe than atypical MDE although the two groups shared many characteristics. The longitudinal overlap of melancholia with atypical depression in almost half of all cases calls for comparative analyses of combined, pure and unspecified MDE.

Bu çalışmanın amacı, Türkiye ve Kazakistan’daki öğretmen adaylarının dijital okuryazarlık düzeylerini ortaya koymak ve belirli değişkenlere göre karşılaştırmalı olarak incelemektir. Araştırma, ilişkisel tarama modeline uygun olarak gerçekleştirilmiştir. Araştırmanın evrenini 2015-2016 öğretim yılında Türkiye ve Kazakistan’da öğrenimlerine devam eden ilkokul ve ortaokul öğretmen adayları oluşturmaktadır. Örneklemini ise, 2015-2016 öğretim yılında Türkiye’de Gazi Üniversitesi, Kazakistan’da ise Ahmet Yesevi Üniversitelerinin Eğitim Fakültelerinde üç ve dördüncü sınıfa devam eden toplam 601 ilkokul ve ortaokul öğretmen adayları oluşturmaktadır. Araştırmada veri toplama aracı olarak Acar, 2014 tarafından geliştirilen Dijital Okuryazarlık Değerlendirme Ölçeği kullanılmıştır. Yapılan analizler sonucunda şu sonuçlara ulaşılmıştır; Cinsiyet değişkenine göre her iki ülkede de kadın öğretmen adayların erkek öğretmen adaylarından daha kalabalık olduğu saptanmıştır. Sınıf değişkenine göre araştırmaya katılan öğretmen adaylarının Türkiye’de 3 ve 4. sınıf sayıları benzerken Kazakistan’da dördüncü sınıfların daha kalabalık oldukları görülmüştür.

The purpose of this study is to analyze effects of blended learning environment on middle school student's’ engagement and academic achivement. Pretest-posttest control group quasi experimental design was utilized. The study was conducted with 52 students in experimental group and 55 students in control group. According to the results of this study in blended learning environment had meaningful increase in average academic achievement when compared to students in face-to-face learning environment. In addition, blended learning has a medium level effect size on students' levels of academic achievement. No meaningful statistical differences were detected for students’ engagement between both groups. However, in blended learning approach, average development of student engagement showed a meaningful rise when compared to face-to-face learning approach.