Uzaktan Eğitim Sürecinde Okul Yöneticilerinin Teknoloji Liderliği Yeterliliklerinin Öğretmen Görüşlerine Göre İncelenmesi

Bu araştırmanın amacı, 2019 yılında ülkemizde etkileri görülmeye başlamış olan COVID-19 pandemisinden dolayı uygulanan uzaktan eğitim sürecinde okul yöneticilerinin teknoloji liderliği yeterliklerine ilişkin öğretmen görüşlerini incelemektir. Araştırmada nitel araştırma yöntemlerinden olgubilim yaklaşımı tercih edilmiş, görüşme tekniğinden faydalanılmıştır. Araştırmanın çalışma grubunu 2021-2022 eğitim öğretim yılında Artvin ili Merkez ilçesindeki ana sınıfı, ortaokul ve liselerde görev yapan ve rastgele seçilen 16 öğretmen oluşturmaktadır. Araştırmada veri toplama aracı olarak araştırmacı tarafından önceden hazırlanmış 7 sorunun bulunduğu yarı yapılandırılmış gözlem formu kullanılmıştır. Veriler araştırmacı tarafından pandemi koşullarına uygun bir ortamda öğretmenlerle yüz yüze görüşmelerle toplanmıştır. Verilerin analizinde, nitel araştırma yöntemlerinden içerik analizi tekniği kullanılmıştır. Araştırmanın bulguları uzaktan eğitim sürecinde okul müdürlerinin teknoloji liderliği yeterliklerine ait öğretmen görüşlerinden oluşmaktadır. Bu görüşler; alınan önlemler, mesleki gelişimi desteklemek, zaman yönetimi, öğretmenlerin görev ve sorumlukları, yöneticilerin teknoloji liderliği yeterlikleri, değişkenler bazında teknoloji liderliği rolü, öğrencinin derse devam takibi olmak üzere 7 alt temada kümelenmiştir. Araştırmanın sonucuna göre, okul müdürlerinin COVID-19 sürecinde sergiledikleri teknoloji liderliği davranışları öğretmenler tarafından yetersiz bulunmuştur

Investigation of the Changes in Perceived Sleep Quality and Quantity among Maritime Students in Relation to Long Term Sea Training

Maritime students spend a certain period of their training on board, depending on their qualifications. Deck officer candidates (deck cadets) must perform an open sea internship on commercial vessels for one year. Deck officers are among to member of crew with important responsibilities to cooperate with the Master during voyage including being involved in navigation and port watches as well as maintenance of the ship and its safety equipment. Deck cadets perform their practical training between academic education periods according to general practice in Turkey. They can be subjected to unusual working hours and rest periods during the mission on the ship. Considering the importance of adequate sleep for productivity, vigilance, sustaining attention and even over-all health and well-being, it is not only sleep quantity but sleep quality is critical. The aim of this study was to investigate of the effect of the long-term onboard training (aprox. 7 months) on the sleep quantity and quality of the maritime students. Data regarding sleep quantity and perceptive quality among the subjects were obtained by using Pittsburg Sleep Quality Index (PSQI). PSQI is a scale providing information on type and violence of sleep disorders and the quality of sleep during the past month. A total of 60 maritime students were asked to fill PSQI before and after onboard training. Demographical information such as age, gender, weight, height and information regarding the internship were also obtained. Of the students 43.3% rated as poor sleeper before the internship and this ratio increased to 73.3% after the internship. A prominent decrease in sleep quality was determined. Sleep duration did not change significantly. This study showed a significant negative effect of onboard training on sleep quality among participants and they did not recover within a month after returning from the sea which indicates potential long term consequencies

Neurotoxicity evaluation of three root canal sealers on cultured rat trigeminal ganglion neurons

The aim of this study was to investigate the possible neurotoxic effects of 3 root canal sealers (RCSs) (AH Plus, GuttaFlow, iRoot SP) on cultured rat trigeminal ganglion (TG) neurons. Primary cultures of TG neurons were obtained from 1 to 2-day old rats. Freshly mixed RCSs were incubated in sterile phosphate buffered saline and cells were incubated with supernatants of the RCSs for different time intervals (1-, 3-, 6- and 24-h; 1 or 1/10 diluted) and viability/cytotoxicity was tested by counting the number of live cells. Pair of dishes with cells from the same culture incubated with only culture medium was considered as negative controls. Cell images were captured and acquired at x200 magnification using a microscope equipped with a camera using special image program. The viable cells were manually counted assigned from the images for each dose and incubation duration. Data was analysed by using 1-way analysis of variance with Tukey post hoc tests. There was no significant change in cell viability after short duration of incubation (1- and 3-h) with the supernatant of any of RCSs, except for undiluted-AH Plus at 3-h. When AH Plus was compared with other RCSs, for diluted supernatants, there was only significant difference between iRoot SP and AH Plus at 24-h (P<0.05). Whereas undiluted-AH Plus was significantly more cytotoxic for 3-, 6- and 24-h periods as compared to respective incubation periods of undiluted other groups (P<0.05). GuttaFlow groups had similar neurotoxic effect on cells for all test periods. All tested RCSs exhibited a variable degree of neurotoxicity on these primary sensory neurons of orofacial tissues, depending on their chemical compositions. GuttaFlow and iRoot SP evoked a less toxic response to TG cells than AH Plus