Ortaöğretim Öğrencilerinin Dijital Yerlilik Özellikleri Değerlendirmelerinin İncelenmesi

Bu araştırma lise öğrencilerinin dijital yerlilik seviyelerinin farklı değişkenlere (cinsiyet, sınıf düzeyi, bilgisayar kullanım yılı, internet kullanım yılı) göre incelenmesini amaçlamaktadır. Araştırmada nicel araştırma yöntemlerinden betimsel tarama modeli kullanılmıştır. Araştırmanın örneklemini Mersin İlindeki 3 lisede öğrenim görmekte olan 769 lise öğrencisi oluşturmaktadır. Veri toplama aracı olarak Teo (2013) tarafından geliştirilen Dijital Yerlilik Özelliklerini değerlendirme ölçeğinin (DNAS), Teo, Kabakçı-Yurdakul ve Ursavaş (2016) tarafından Türkçe ’ye uyarlanan versiyonu kullanılmıştır. Araştırmanın bulguları, lise öğrencilerinin dijital yerlilik özelliklerini gösterme düzeylerinin ortanın üstünde/ yüksek bir seviyede olduğunu göstermektedir. Öğrencilerin dijital yerlilik düzeyleri cinsiyet açısından anlamlı bir farklılık göstermemesine rağmen, sınıf düzeyinde anlamlı bir farklılık ortaya çıkmıştır. En yüksek dijital yerlilik puanına sahip olan grubun 10. Sınıflar ve en düşük dijital yerlilik puanına sahip grubun ise 11. sınıflar olduğu görülmektedir. Bunun yanı sıra, öğrencilerin bilgisayar kullanım yılı ve internet kullanım yılları değişkenlerine göre dijital yerlilik düzeylerinde anlamlı bir farklılık olduğu ortaya çıkmıştır. Kullanım yılı fazla olan öğrencilerin daha yüksek dijital yerlilik puanına sahip olduğu görülmüştür

Lactoferrin Levels in the Gastric Tissue of Helicobacter pylori-Positive and -Negative Patients and Its Effect on Anemia

Aim. To determine gastric tissue lactoferrin (Lf) levels of Helicobacter pylori- (Hp-) positive and -negative patients and its effect on anemia. Methods. Cases in which initial presentation was of abdominal pain and that were Hp-positive at endoscopy were included. Hp-positive cases and -negative controls were divided into two groups. Results. The study included 64 cases (average: 10.2 ± 0.4 years, 39 male and 25 female). Lf levels were subsequently studied on 61 cases. 45 (73.8%) of these were Hp-positive, while 16 (22.2%) were Hp-negative. In Hp-positive cases, mean staining percentages and density of glands in the antral mucosa were 45.5 ± 4.7% and 1.9 ± 0.1, respectively. Hp-negative cases showed significantly different values of 17.8 ± 4.5% and 1.3 ± 0.2, respectively. Hemoglobin and serum ferritin values of Hp-positive cases were 12.7 ± 0.2 g/dL and 32.5 ± 2 ng/mL, but these were comparable with Hp-negative cases (12.6 ± 0.1 g/dL and 30.7 ± 4.4 ng/mL). Conclusions. Tissue Lf was significantly higher in Hp-positive cases compared to Hp-negative cases, but no difference was observed between the two groups with regards to hemoglobin and ferritin level. As a result, it is difficult to say that this rise in Lf plays a role in the development of iron deficiency anemia in Hp-positive patients

Uzman ve deneyimsiz kullanıcıların kavram haritası oluşturma süreçlerinin bilişsel analizi.

In this study, Concept map (CM) development processes of the experts and novices were explored. This studyaimed to investigate the similarities and differences among novices and experts’ CM development process regarding their cognitive processes. Two experiments were designed; eye-tracking, written and verbal data were collected from 29 pre-service teachers and 6 subject matter experts.Data were analyzed by using qualitative and quantitative data analysis methods. The results indicated that eventhough some of the strategies were similar, there were different patterns followed by the experts and novices during the CM development process. Both experts and novices embraced ‘deductive reasoning’, and preferred ‘hierarchical’ type of CMs. The other patterns recognized during the process were‘filling information in an order’, ‘branch construction pattern’,‘content richness’ and ‘progress pattern’. Novices and experts were distinguished in their content richness measures which used to determine the quality of the maps. Regarding the progress pattern, novices and experts differed in terms of the frequency and duration for specific acts invarious phases of their progress in CM development process. Furthermore, expert participants differed from novices in their fixation count numbers, fixation durations, visit duration periods for specific actions. Fixation count numbers of the novices were higher than the experts during the entire process and in specific dimensions of the CM development process. As a conclusion, these pattern differences affect the CM development process directly and the instructors need to give emphasis to these critical points while using CM during the instruction, and with the help of these pattern differences, instructors could guide the learner effectively and acquire content rich CMs.Ph.D. - Doctoral Progra

How Serif and Sans Serif Typefaces Influence Reading on Screen An Eye Tracking Study

This study aims to investigate how serif and sans serif typefaces influence reading from screen. 10 graduate students voluntarily participated in the study. The data were collected in a laboratory setting. Participants were asked to find the misspelled words in two different texts written in serif and sans serif typeface. The participants tried to find the misspelled words in the texts, during the data collection there was no time limitation. Participants' eye movements were recorded by Tobii 1750 eye tracker device. The data were analyzed according to the accuracy and eye behavior metrics. The findings showed that participants read from sans serif typeface faster and more accurate than serif typeface. The findings suggest that participants fixated on the misspelled words more on serif typeface than sans serif typeface, in terms of the total visit duration participants spent more time on serif typeface than sans serif typeface

Long-Term Palliative Effect of Stenting in Gastric Outlet Obstruction Due to Transarterial Chemoembolization with Yttrium-90 in a Patient with Metastatic Neuroendocrine Tumor

Internal radioembolization with yttrium-90 is a promising treatment method, predominantly for liver tumors. However, the shifting of yttrium-90-loaded spherules into the arteries and veins that supply the duodenum and stomach, leading to ulceration, hemorrhage, perforation, and outlet obstruction of these organs, is one of the major undesirable consequences of this technique. We report a case of gastric outlet obstruction (GOO) due to antropyloric stenosis with ulceration, edema, and inflammation following transarterial yttrium-90 treatment for a metastatic neuroendocrine tumor in a 58-year-old man. Stenting was used for palliation in this case. GOO improved after stenting and recovery of oral intake was permanent after stent removal

Olgu sunumu: 83 yaşındaki bir hastada primer varisella enfeksiyonu

İstanbul Bilim Üniversitesi, Tıp Fakültesi.Varisella enfeksiyonu Varicella zoster virus'un (VZV) etken olduğu, tüm dünyada yaygın olarak görülen çocukluk çağının bulaşıcı hastalıklarından biridir. Primer enfeksiyonu geçiren olguların %90'ı 10 yaşın altındadır. Hastalığın şiddeti yaşla birlikte artar. Yetişkinler, immunsuprese bireyler ve gebeler visseral tutulum ve komplikasyonlar açısından risk altındadır (1,2). Yoğun bakım ünitesinde izlenen ve kritik hastalıkları olanlar immunolojik olarak zayıf olma eğilimindedirler ve bu hastalarda çeşitli fırsatçı enfeksiyonlar sık görülür. Sistemik VZV enfeksiyonu bu grup hastalarda beklenen ve sık görülen fırsatçı enfeksiyonlardan biri değildir. Ancak enfeksiyonun akla getirilip tanının erken konulması ve gerekli tedavinin düzenlenmesi komplikasyon riskini azaltır (3). Burada birçok sistemik hastalığı bulunan 83 yaşındaki bir hastada gelişen sistemik VZV enfeksiyonu sunulmaktadır