Liselerin Öğrenme Ortamlarının Belirlenmesine Yönelik Bir Kümeleme Analizi Çalışması

Learning environment profiles perceived in high schools were investigated by means of hierarchical cluster analysis. Employing stratified random sampling procedure, data was collected from 985 students at 22 schools, those who study in 6 general, 13 Anatolian and 3 vocational high schools located across 12 different districts of Istanbul. By hierarchical cluster analysis, students’ perceptions were clustered and classified into 4 school learning environment profiles, namely “technology-rich & ideal” (profile A), “positive” (profile B), “moderately positive” (profile C) and “negative” (profile D) learning environments. It was revealed that 42.7% of general high school students and 53.1% of vocational high school students perceived “moderately positive learning environment” in their schools on the first rank, whereas 41.8% of Anatolian high school students mostly perceived “positive learning environment”. “Technology-rich & ideal” environment was ranked first among vocational high school students with 11.2 %

A Comprehensive Research Design for Experimental Studies in Science Education

Experimental methods have a discrete place due to their effectiveness to establish cause-effect relationship and, to make manipulations and to provide control over the variables. Although majority of the science education dissertations in Turkey involve experimental studies, lack of sound experimental designs to control validity threats is still an important problem. And also, there is a need to conduct school-wide experiments to test effectiveness of methods and techniques or other reform requirements in science education. These experiments need more comprehensive and powerful research designs to overcome problems about internal validity threats. This study purposes to suggest a new, more comprehensible design of experimental study. Five-group experimental design has been suggesting, by controlling more threats to internal validity, a more sound way to establish cause-effect relationship and to control more variables which are potentially effective on dependent variables of the science education studies

Analytic Hierarchy Process While Choosing Authentication with Radio Frequency Identification (RFID) Systems

Nowadays, it cannot be thought that companies carry out their activities stand away from technology. Especially, with Fourth Industrial Revolution 4.0 (Industry 4.0) smart technologies has started to play big role in factories. One of the innovation of industry 4.0 is RFI technology, today used by various industries in multiple areas, and there are widespread researches about this subject thus aims that to improve these technologies one step further. Besides that, management of technology becomes more crucial from many points of view of companies. Inaccurate technology investment usually might cause loss for companies. In this context, in order to choose best RFID option with defined criteria, at a company in automotive sector where technological development is followed and implemented, hierarchical model is established and from based on this model analytical hierarchy process used and an application is carried out

The presence of hydronephrosıs ın stagıng bladder cancer: an omınous sıgn

Objective: We investigated whether the presence of unilateral or bilateral upper tract obstruction could accurately predict advanced cancer stage. Methods: Six hundred and ten patients with bladder cancer entered into the tumor registries of our institutions between January 1990 and December 1994. The median patient age was 64 years (range 35 to 80). A total 75 (12%) patients had unilateral or bilateral hydronephrosis on an IVP at the time of initial diagnosis of the bladder cancer. Preoperative screening included physical examination, chest radiograph, complete blood count, blood urea nitrogen, creatinin, electrolyte analysis and IVP. Furthermore, patients were usually evaluated by bone scan and computerized tomography (CT). The diagnosis of transitional cell carcinoma was made by cystoscopy and transurethral resection of the tumor. Staging transurethral resection was done in all cases. Results: During a 5-year period 75 of 610 patients with carcinoma of the bladder had ureteral obstruction on excretory urography at the time of the initial diagnosis. Preoperative IVP revealed unilateral and bilateral hydronephrosis in 55 (73%) and 20 (27%) patients, respectively. Pathological staging revealed predominantly pT1 lesions for patients with unilateral obstruction. There were 30 (55%) patients with pT1, 10 (18%) with pT2, and 15 (27%) with pT3. Pathological staging revealed predominantly pT2 lesions for patients with bilateral obstruction. Pathological stage was pT2 in 10 (50%) cases, pT3 in 5 (25%), and pT4 in 5 (25%). Conclusion: IVP can be used in staging because hydronephrosis may Indicate the presence of a muscle-invasive bladder cancer, especially, bilateral hydronephrosis was strongly associated with advanced stage disease

Üstün Yetenekli Ortaokul Öğrencilerinin Fen Bilimlerini Öğrenmede Zihinsel Risk Alma Davranışları Açısından Akranlarıyla Karşılaştırılması

ÖZ: Bu çalışmanın amacı üstün yetenekli olarak tanılanan ortaokul öğrencilerinin herhangi bir tanılamaya girmemiş akranlarıyla fen bilimlerini öğrenmede zihinsel risk alma davranışları açısından karşılaştırılmasıdır. Çalışmaya katılan üstün yetenekli öğrenciler WISC-R testinden 130 ve üzeri alan öğrencilerden oluşmaktadır. Çalışma 248’i herhangi bir tanılama sürecine girmemiş, 102’si ise üstün yetenekli olarak tanılanmış öğrencilerden oluşmak üzere toplam 350 öğrenciyle yürütülmüştür. Öğrenciler altıncı, yedinci ve sekizinci sınıfta öğrenim gören kişileri içermektedir. Araştırmada veri toplama araçları olarak zihinsel risk alma ölçeği ve bireysel bilgi formu kullanılmıştır. Araştırmanın verilerini analiz etmek için karşılaştırma istatistiği (bağımsız gruplar t-testi) kullanılmıştır. Araştırmanın bulguları karşılaştırılan gruplar arasında zihinsel risk alma davranışı yönünden anlamlı bir farkın olmadığını göstermiştir

Sedación y Analgesia en Colonoscopia Electiva: Propofol-fentanilo versus Propofol-Alfentanilo

ResumenJustificativa y objetivoLa sedación y la analgesia están recomendadas en la colonoscopia para propiciar la comodidad, porque son procedimientos invasivos y pueden ser dolorosos. Este estudio tuvo el objetivo de comparar las combinaciones de propofol-alfentanilo y propofol-fentanilo para la sedación y la analgesia en pacientes sometidos a la colonoscopia electiva.MétodosEstudio prospectivo y aleatorio. Participaron en el estudio 80 pacientes, ASA I-II, entre 18 y 65 años. La inducción de sedación y la analgesia fue hecha con propofol (1 mg.kg-1) y fentanilo (1 μg.kg-1) en el grupo propofol-fentanilo (PF) y con propofol (1 mg.kg-1) y alfentanilo (10 μg.kg-1) en el grupo propofol-alfentanilo (PA). Para el mantenimiento, dosis adicionales de propofol se administraron en bolos de 0,5 mg.kg-1 para obtener las puntuaciones de 3-4 en la Escala de Sedación de Ramsey (ESR). Se registraron los datos demográficos, la frecuencia cardíaca, la presión arterial promedio (PAP), la saturación de oxígeno de la hemoglobina (SpO2), los valores de la ESR, el tiempo de colonoscopia, la dosis total de propofol, las complicaciones, el tiempo de recuperación y el tiempo para el alta, como también las puntuaciones de satisfacción del colonoscopista y del paciente.ResultadosLa PAP a los 15 minutos en el Grupo PA fue significativamente mayor que en el Grupo PF (p = 0,037). La frecuencia cardíaca promedio del grupo PA fue mayor al inicio que en las mensuraciones posteriores (p = 0,012, p = 0,002). El promedio de la dosis total de propofol del Grupo PA fue significativamente mayor que la del Grupo PF (p = 0,028). El tiempo promedio de recuperación del grupo PA fue significativamente mayor que el del grupo PF (p = 0,032).ConclusionesEl Fentanilo proporciona mejores condiciones de operación y reduce la necesidad de dosis adicionales de propofol. Esas ventajas reducen el tiempo de recuperación. Por tanto, el propofol-fentanilo es superior al propofol-alfentanilo para la sedación y la analgesia en la colonoscopia

Sedation-Analgesia in Elective Colonoscopy: Propofol-Fentanyl Versus Propofol-Alfentanil

AbstractBackground and objectivesSedation-analgesia is recommended for comfortable colonoscopy procedures, which are invasive and can be painful. This study aimed to compare the combinations of propofol-alfentanil and propofol-fentanyl for sedation-analgesia in elective colonoscopy patients.MethodsThis prospective and randomized study was planned in ASA I-II groups and included 80 patients between the ages of 18 and 65 years. Sedation-analgesia induction was performed as 1μg.kg-1 fentanyl, 1mg.kg-1 propofol in the propofol-fentanyl group (Group PF) and 10μg.kg-1 alfentanil, 1mg.kg-1 propofol in the propofol-alfentanil group (Group PA). Patients’ scores were limited to 3-4 values on the Ramsey Sedation Scale (RSS) by 0.5mg.kg-1 bolus additional doses of propofol in sedation-analgesia maintenance. We recorded demographical data, heart rate, mean arterial pressure (MAP), oxygen saturation of hemoglobin (SpO2), RSS value, colonoscopy time, total dose of propofol, complications, recovery time, and discharge time, as well as colonoscopist and patient satisfaction scores.ResultsMAP at the 15th minute in Group PA was significantly higher than in Group PF (p = 0.037). Group PA's beginning mean heart rate was higher than the mean heart rate at subsequent readings (p = 0.012, p = 0.002). The mean total propofol dose of Group PA was significantly higher than the total dose of Group PF (p = 0.028). The mean recovery time of Group PA was significantly longer than that of Group PF (p = 0.032).ConclusionFentanyl provides better operative conditions and reduces the need for additional propofol doses. These advantages cause a shorter recovery time. Therefore, propofol-fentanyl is superior to the propofol-alfentanil for sedation-analgesia in colonoscopy

A Case of Hepatitis B Reactivation with Acute Flare Three Months After Tenofovir Prophylaxis Withdrawal in a Allogenic Hematopoietic Stem Cell Transplantation Patient

Hepatitis B virus (HBV) infection is a major health problem worldwide. HBV reactivation is associated with high mortality rates in hematopoietic stem cell transplantation (HSCT) and, prophylactic antiviral treatment is suggested to prevent this phenomenon. However, the duration of antiviral treatment in HSCT patients is not fully defined and the time of immune recovery is considered the best parameter for a drug to be safely interrupted. We aimed to present a case of hepatitis B reactivation after cessation of one-year prophylactic tenofovir treatment in a anti-hepatitis B core immunoglobulin G-positive patient who received allogenic HSCT treatment for chronic lymphocytic leukemia