Synthesis and characterization of clay-supported naoparticles of zero-valent iron and its application for the removal of aqueous Co2+ and Cu2+ ions

Thesis (Master)--İzmir Institute of Technology, Chemistry, İzmir, 2008Includes bibliographical references (leaves: 68-73)Text in English; Abstract: Turkish and Englishxii, 73 leavesIn recent years Permeable Reactive Barriers (PRBs) are being developed and used in the removal of organic and inorganic pollutants from surface water and groundwater. Zero-valent iron is viewed as an ideal reactive material for PRBs by means of its high sorption/reduction capacity towards various toxic ions. Zero-valent iron synthesized in nanoscale has a greater affinity to reduce/adsorb various toxic aqueous ions by virtue of its large surface area.In this work, nanoscaled (10-100nm) zero-valent iron (nZVI) was synthesized in ethanol by borohydride reduction method in atmospheric conditions. It was observed that iron nanoparticles are mainly in zero-valent oxidation state and that they remain without significant oxidation for weeks. To enhance its effect and usability, nZVI was supported by kaolinite and montmorillonite during synthesis. Characterization of those clay-supported nZVI was performed using XRD, SEM, TEM, EELS, XPS, Zeta Meter, BET-N2. Iron nanoparticles consist of a zero-valent core and a surrounding oxide shell with approximate thickness of 3-5 nm. The application of clays as support materials have led to a partial decrease in the aggregation of iron nanoparticles known to normally form chain-like structure. The diameter of unsupported iron nanoparticles was predominently within the range 20-80 nm, while clay-supported iron nanoparticles existing as dispersed nano spheres had particle diameters within 10-50 nm.The synthesized materials were applied as adsorbents for Co2+ and Cu2+ ions. According to the results , unsupported and clay-supported nZVI has a great capacity to immobilize Co2+ and Cu2+ ions with very fast kinetics. While Co2+ seems to be fixed via the oxohydroxyl groups on the surface of iron nanoparticles, Cu2+ was fixed by a redox mechanism that lead to formation of Cu2O and Cu0. The performed studies indicate that kaolinite- and montmorillonite-supported zero-valent iron nanoparticles are promising reactive materials for environmental applications

The effects of sports participation on internet addiction of high school students: Spora katılımın lise öğrencilerinin internet bağımlılığına etkisi

The purpose of this study was to investigate the effects of sport participation status on internet addiction of high school students. The sample group consisted of total 430 students (220 licensed student athletes and 210 non-athletes) from 10 different high schools in Bolu center. Research data were obtained by “Young Internet Addiction Test Short Form” (YIBT-KF) which was adapted to Turkish by Kutlu Savcı, Demir ve Arslan (2016). Internal consistency of the scale was calculated as α= 0.93 in this study. The results of this study showed that a) internet addiction levels of male students were higher than female students, b) internet addiction levels of athlete students were lower than non-athlete students, c) academic success for athlete students were more positive effect in internet addiction and d) the negative effect of long-term usage a smart phone had less negative effect on internet addiction level of athlete students. ​Extended English summary is in the end of Full Text PDF (TURKISH) file.   Özet Bu çalışmada, lise öğrencilerinin spora katılım durumlarının internet bağımlılıklarına etkisinin incelenmesi amaçlanmıştır. Bolu merkezindeki 10 farklı liseden toplam 430 öğrenci (220 lisanlı spor yapan ve 210 lisanslı olarak spor yapmayan) çalışmanın örneklem grubunu oluşmuştur. Çalışma verilerinin toplanmasında, Kutlu, Savcı, Demir ve Arslan (2016) tarafından Türkçeye uyarlanan “Young İnternet Bağımlılığı Testi Kısa Formu” (YİBT-KF) kullanılmıştır. Bu çalışma için ölçeğin Cronbach Alpha iç tutarlılık değerleri ise α=0.93 olarak hesaplanmıştır. Araştırmada,  a) spor yapan öğrencilerin internet bağımlılıklarının yapmayanlardan daha düşük olduğu sonucuna ulaşılmıştır. b) erkek öğrencilerin internet bağımlılık düzeylerinin kadın öğrencilerden daha yüksek olduğu, c) spor yapanlarda yapmayanlara göre akademik başarının internet bağımlılığında daha etkili olduğu ve d) spor yapanlarda yapmayanlara göre cep telefonu kullanım yılının internet bağımlılığına etkisinin daha az olduğu sonucuna ulaşılmıştır

Supporting Teachers’ Engagement in Pedagogies of Social Justice (STEPS): Collaborative project between five universities in Turkey and the USA

            This paper reports the findings of a research project titled Supporting Teachers’ Engagement in Pedagogies of Social Justice (STEPS), in which pre-service teachers from five universities and in-service teachers from Turkey and the US participated in a six-week-long virtual exchange project. The main objective of the study was to promote social justice-informed pedagogies in K-12 schools through professional development and conversations between pre-service and in-service teachers from two countries. The study addressed the following research question: How does a six-week virtual exchange project influence in-service and pre-service teachers’ social justice orientation? For this purpose, we collected quantitative data through a questionnaire based on social justice standards developed by a group of researchers called “Learning for Justice”. Participants completed this questionnaire before and after their participation in the project. Additionally, we asked the participants to write a reflection post at the end of the project regarding its impact, and we treated their posts as qualitative data. At the end of the analysis, we found that the mean scores of the post-test results were significantly higher than those of the pre-test results, which indicated that the project changed the perspectives of the participants in a positive way. Furthermore, analyzing the qualitative data, we found four recurring themes: a) learning through sharing and working in collaboration, b) noticing common concerns with other educators, c) self-awareness and self-evaluation, and d) promise for taking action

Athletes’ Perception of Coaches’ Behavior and Skills About Their Sport

This study examined the perception of athletes’ about their coaches’ behavior and skills in terms of knowledge and skills, fairness and coaches’ characteristic features. The research was conducted by using relational survey method. The subjects of the study were 95 females and 180 males from diffrent sports. Both team sports athletes such as football, volleyball, basketball, handball and individual sports such as karate, taekwondo, wrestling, kickboxing voluntarily involved ın the study.Perceived Coach Attitudes and Behaviours Scale (PCABS) which was developed by Uzum et al. (2018) was used to asses percevied coaches’ knowledge and skills, fairness and characteristic features by athletes. The scale was composed of 24 items and 3 sub-dimensions (Characteristic Features, Skills and Knowledge, Fairness). Uzum et al. (2018) reported the internal consistency for subscales of PCABS ranging from .56 and .88. For the purpose of this study the reliability of two sub-scales of the PCABS was examined using Cronbach’s alpha coefficient (α=.83 for knowledge and skills; α=.81for characteristic features of coaches. The data was analyzed by one-way analysis of variance (ANOVA), Tukey’s Post-Hoc Analysis and Pearson Correlation analysis. The level of significance for the study was set at p.05)

A radiotracer study of the adsorption behavior of aqueous Ba2+ ions on nanoparticles of zero-valent iron

Recently, iron nanoparticles are increasingly being tested as adsorbents for various types of organic and inorganic pollutants. In this study, nanoparticles of zero-valent iron (NZVI) synthesized under atmospheric conditions were employed for the removal of Ba2+ ions in a concentration range 10-3 to 10-6 M. Throughout the study, 133Ba was used as a tracer to study the effects of time, concentration, and temperature. The obtained data was analyzed using various kinetic models and adsorption isotherms. Pseudo-second-order kinetics and Dubinin-Radushkevich isotherm model provided the best correlation with the obtained data. Observed thermodynamic parameters showed that the process is exothermic and hence enthalpy-driven.2006 İYTE 1

Okul Psikolojik Danışmanlarının Manevi Danışmanlık ve Rehberlik Hizmetlerine Yönelik Görüşleri

Manevi danışmanlık ve rehberliğin amacı, dini ve manevi referanslardan faydalanarak problem yaşayan insanların bu problemlerini anlamlandırmak, hayatı kontrol altına alarak ve onun kalitesini artırarak sürdürülebilir hale getirmektir. İnsanın ruhunu en büyük güç kaynağı olan Allah’a dayayarak insandaki var olan potansiyeli harekete geçirmek ve her türlü sorunla başa çıkmasına yardımcı olmaktır. Manevi danışmanlığın amacı, danışanın öncelikle kendini tanıyıp anlaması, gerçekçi bir benlik kazanması, kendini koşulsuz bir şekilde kabul edip gizil güçlerini açığa çıkarması ve bunun sonucunda kendisiyle ve çevresiyle uyumlu hale gelmesi ve mutlu olmasıdır. Bu çalışma, Milli Eğitim Bakanlığına bağlı okullarda görev yapan psikolojik danışmanların manevi danışmanlık ve rehberlik hizmetlerine yönelik görüşlerini tespit etmek üzere ele alınmıştır. Bu kapsamda geniş bir literatür taraması yapılarak çalışmanın kavramsal çerçevesi oluşturulmuştur. Çalışma konusunun daha iyi anlaşılabilmesi için temel kavramlara yer verilmiş, manevi danışmanlık ve rehberlik hizmetleri ile psikolojik danışma ve rehberlik hizmetleri üzerinde durulmuştur. Çalışma, Milli Eğitim Bakanlığına bağlı okullarda görev yapan 19 psikolojik danışmandan oluşan çalışma grubu ile yürütülmüştür. Katılımcılara yarı yapılandırılmış sorulardan oluşan bir form uygulanmıştır. Uygulama sonunda elde edilen veriler betimsel analiz yöntemiyle çözümlenmiştir. Çalışmanın sonunda katılımcıların verdiği cevaplardan hareketle manevi danışmanlık ve rehberlik hizmetlerinin bir ihtiyaç olduğu, psikolojik danışma sürecine ve psikolojik iyi oluşa katkı sağladığı, bireyin yaşam amacı keşfetmesinde önemli rolü olduğu ve dini pratiklerin psikolojik sorunlarla mücadelede etkili olduğu sonucuna ulaşılmıştır. Ayrıca manevi danışmanlık ve rehberlik hizmetlerinin ölüm ve yas gibi durumlarda oldukça etkili olduğu belirtilmektedir. Ancak manevi danışmanlık ve rehberlik hizmetlerinin okullarda uygulanabilirliği için gerekli şartların henüz yeterli olmadığı tespit edilmiştir. Çalışmanın etik izni Muş Alparslan Üniversitesi, Bilimsel Araştırma ve Yayın Etiği Kurulunun 22.09.2022 tarih ve 62188 nolu kararı ile alınmıştır

Performans Değerlendirme Yöntemleri Üzerine Nitel Bir Araştırma: Kocaeli İli Örneği A Qualitative Research on Performance Evaluation Methods: The Sample of Kocaeli Province

İnsan kaynağı, işletmelerde sürdürülebilir rekabeti sağlamada ve stratejiler doğrultusunda hareket etmede çok önemli bir yere sahiptir. İşletme, amaçlarını gerçekleştirirken insan kaynakları fonksiyonlarından, özellikle performans değerlendirmeden yararlanmaktadır. Bu makalenin amacı, performans değerlendirmesinde karşılaşılan sorunlar ile performans değerlendirme hatalarının ne olduğunu ve hangi performans değerlendirme yöntemlerinin kullanıldığını belirlemektir. Bu çalışma nitel bir araştırmadır. Veri toplama tekniği olarak yarı yapılandırılmış mülakat tekniği kullanılmıştır. Araştırmanın evrenini Kocaeli İlinde sanayi ve hizmet sektöründe faaliyet gösteren işletmeler oluşturmaktadır. Örnek kütleyi araştırmaya gönüllü olarak katılan işletmeler oluşturmuştur. Veri analizinde içerik analizi yöntemi kullanılarak sonuçlara ulaşılmıştır. Araştırmada; işletmelerde klasik ve çağdaş performans değerlendirme yöntemlerinin aynı oranda uygulandığı tespit edilmiştir. Human resources have a very important place in maintaining sustainable competition in the business and acting in the direction of the strategies. The enterprise benefits from its human resources functions while performing its objectives, especially without evaluating performance. The purpose of this article is to determine the problems encountered in performance evaluation, what performance evaluation faults are, and which performance evaluation methods are used. This study is a qualitative research. Semi-structured interview technique was used as data collection technique. The universe of research in Kocaeli and businesses operating in the industrial and service sectors. Business participating voluntarily to research the sample. The results were obtained by using content analysis method in data analysis. In the research; it has been determined that the classical and contemporary performance evaluation methods are applied in the same way in business

Dutch nationalism and the question of foreigners in the Netherlands /

It is argued in classical political science that policy outputs are fed by public preferences (inputs). It is also argued that these inputs more resonate in Western democracies. For that reason, policy outputs in democratic countries are expected to reflect public preferences. At this point, it is important to know how to measure and how to reach these preferences and clear result of this process is public opinion polls. In that sense, it is discussed that in spite of the fact that the credibility of public opinion polls is a bit controversial, they still measure and reflect public preferences. In this context, according to the eurobarometer survey results, although Dutch people are as xenophobic as European average, these xenophobic sentiments that constitute public inputs do not turn into policy outputs in the Netherlands. Therefore, in the Dutch case, policy outputs and public inputs differ from each other. Indeed, integrative immigration policy and weaker extreme right party tradition are clear proof of this situation in the country. However, why classical input-output correlation does not work in the Netherlands? According to the findings of this study, civic nationalism and the pillar system prevent public inputs in transforming into policy outputs