On real Enriques surfaces

Ankara : Department of Mathematics and Institute of Engineering and Sciences, Bilkent Univ., 1997.Thesis (Master's) -- Bilkent University, 1997.Includes bibliographical references leaves 27-28.Küçük, ÖzgülM.S

Hydrothermal synthesis and characterization of ethylenediamine-containing molybdenum oxides

Thesis (Master)--İzmir Institute of Technology, Chemistry, İzmir, 2006Includes bibliographical references (leaves: 86-92)Text in English; Abstract: Turkish and Englishxii, 92 leavesRecently, hydrothermal synthesis and characterization of organic-inorganic hybrid materials has attracted great attention.A novel organic-inorganic hybrid material, [Cu(en)MoO4], was hydrothermally synthesized as blue crystals. A mixture of Na2MoO4 CuCl2 NaCl, ethylenediamine and water was loaded into a 23 mL autoclave and heated at 170°C for 72 h. The compound crystallizes in the space group P2(1)/c of the monoclinic system with four formula units in a cell of dimensions a . 7.6743(15) b . 9.4364(19)c . 9.9538(2) . 72.266(3) V . 686.6(2) The structure is composed of {MoO4}tetrahedra and {CuN2O4} octahedra. Each pair of copper octahedra forms a binuclear edge-sharing unit through a {Cu2O2} interaction. The binuclear octahedral units are interconnected through the bridging {MoO4} yielding a layer structure.Purple crystals of a known hybrid material, [Cu(en)2]2[Mo8O26], was hydrothermally obtained under different reaction conditions. A mixture of Na2MoO4 ethylenediamine and water was loaded into the autoclave and heated at 170°C for 72 crystallizes in the space group Pbca of the orthorhombic system with eight formula units in a cell of dimensions a . 13.516 b . 15.548(3) c . 16.725(3) V . 3514.7(12) The structure consists of linked through groups. Each unit forms covalent interactions with two units.Green and black crystals were obtained from the reaction of with different ratios. Via the reaction of NaCl, ethylenediamine and yellow crystals were obtained

Creative Drama in the Teaching of Education for Sustainable Development: Sample Activity about Sustainability and Sustainable Production

Creative drama can be adapted to the education for sustainable development and it can be used as an effective instructional strategy. The use of creative drama can be an effective teaching method for students to acquire new information and raise their awareness of the education for sustainable development. Though the number and severity of the local, national and global problems are rapidly increasing, the number of materials to be used to help students to achieve sustainable living gains in the class is limited. Thus, the present study aims to develop sample creative drama activity that can be used by teachers while teaching sustainability issues. The creative drama activity developed within the framework of the present study are believed to be sample for the practitioners who want to teach basic concepts related to sustainable living and sustainable production. Keywords: Creative drama, education for sustainable development, sustainability, sustainable productio

60-72 Aylık Çocukların Yaratıcılık Becerileri Üzerinde Zihin Haritalama Çalışmalarının Etkisi

Along with the needs of the 21st century, flexible thinking and creativity skills in the education of young children began to gain importance. One of the techniques for supporting the skills of children to think flexibly and generate new ideas and the ability to integrate their knowledge, is motivation through mind mapping. This research which used a pre-test - post-test control group experimental model aimed to examine the effect of the mind mapping program, developed for 60-72-month-old children, on their creativity skills. The research was conducted in two classrooms in preschool education, located in the Kadıköy district of İstanbul. The study group consisted of 47 randomly assigned children of which 26 were experimental group and 21 to the control group. of w The Creative Thinking Skills of the Hybrid Creativity was used as pre-test and post-test measurement of the creativity skills of the children in the research project. Following the pre-tests, members of experimental group were first subjected to five mind mapping studies for the purpose of learning. These studies were carried out once a week and completed within five weeks. Later, for a total of 10 weeks, the children prepared individual mind maps about various subjects. During the week, the children prepared their mind maps at playtime. Post-tests were conducted at the end of the practices, and data was collected. Upon collection of the data, the t-test was implemented on the independent group in order to discover whether there is an important difference in the findings for the experimental and control group through the use of the pre-test of the Creative Thinking Skills of the Hybrid Creativity. After analysis, the difference between the arithmetic means of the groups was found to be significant (t=2.29; p<.05). In order to assess the possible effect of the difference on the post-test a single factor covariance analysis (ANCOVA) was carried out. Means were compared with paired sample t-test and independent samples t-test. The former test was used to determine whether or not there is a significant difference between the mean of the pre-test and post-test scores of the Creative Thinking Skills of the Hybrid Creativity applied for the experimental and control groups. Independent samples were subjected to the t-test to determine whether or not there was a significant difference between the mean of the post-test scores. Lastly, one-factor analysis of covariance (ANCOVA) was performed to find out that the difference between the post-test means arising from the independent variable application or the difference between the pre-tests revealed in comparison. It was understood as a result of the analyses that creativity skills of both experimental and control groups increased. However, the covariance analysis conducted to test the significance of the increase in arithmetic means of the experimental and control groups by keeping the pre-test results constant showed that the children who created mind mapping progressed further than the children who did not create mind mapping. It was concluded in the research that mind mapping is an effective strategy for development of preschool children’s creative skills.Yirmi birinci yüzyıl gereksinimleriyle birlikte küçük çocukların eğitiminde esnek düşünebilme ve yaratıcılık becerileri önem kazanmaya başlamıştır. Çocukların düşüncelerini harekete geçirerek esnek düşünebilme, yeni fikirler üretebilme ve bilgiyi bütünleştirebilme becerilerini destekleyen tekniklerden biri de zihin haritalamadır. Ön-test son-test kontrol gruplu deneysel modelin kullanıldığı araştırmada, 60-72 ay grubu çocuklar için geliştirilen zihin haritalama programının çocukların yaratıcılık becerilerine etkisinin incelenmesi amaçlanmıştır. Araştırma, İstanbul ilinin Kadıköy ilçesinde bulunan bir okul öncesi eğitim kurumunun bünyesindeki iki sınıfta yürütülmüştür. Çalışma grubunu rastgele atanan 26’sı ve 21’i kontrol grubu olmak üzere toplam 47 çocuk oluşturmaktadır. Araştırmada öntest ve sontest olarak çocukların yaratıcılık becerilerinin ölçülebilmesi amacıyla Hibrit Yaratıcılık Testi kullanılmıştır. Öntestlerin ardından deney grubunu oluşturan çocuklarla ilk olarak öğrenme amaçlı beş adet zihin haritalama çalışması gerçekleştirilmiştir. Bu çalışmalar haftada bir gün olmak üzere beş hafta içerisinde tamamlanmıştır. Daha sonra toplam 10 hafta süreyle çocukların çeşitli konulara yönelik olarak bireysel zihin haritaları hazırlamaları sağlanmıştır. Çocuklar zihin haritalarını hafta boyunca oyun zamanlarında hazırlayarak tamamlamışlardır. Uygulamaların tamamlanmasının ardından sontestler gerçekleştirilmiştir. Verilerin toplanmasının ardından deney ve kontrol grubunun Hibrit Yaratıcılık Testi öntest toplam puanları ortalamaları arasında anlamlı bir farklılık bulunup bulunmadığını belirlemek amacıyla bağımsız gruplar t testi kullanılmıştır. Analiz sonucunda grupların aritmetik ortalamaları arasındaki farklılık anlamlı bulunmuştur (t=2.29; p<.05). Bu farklılığın sontestler üzerindeki olası etkisinin denetlenmesi amacıyla sontest karşılaştırılmasında tek faktörlü kovaryans analizi (ANCOVA) yapılmıştır. Deney ve kontrol gruplarının Hibrit Yaratıcılık Testi öntest-sontest toplam puanları ortalamaları arasında anlamlı bir farklılık bulunup bulunmadığını belirlemek amacıyla eşleştirişmiş gruplar t testiyle, sontest toplam puanı ortalamaları arasında anlamlı bir farklılık bulunup bulunmadığını belirlemek amacıyla ise bağımsız gruplar t testiyle ortalamalar karşılaştırılmıştır. Son olarak sontest ortalamaları arasında ortaya çıkan farklılığın bağımsız değişken uygulamasından ya da öntestler arası karşılaştırmada saptanan farklılıktan kaynaklandığını belirlemek amacıyla tek faktörlü kovaryans analizi (ANCOVA) uygulanmıştır. Yapılan analizler sonucunda hem deney hem de kontrol grubunun yaratıcılık becerilerinde artış olduğu anlaşılmıştır. Ancak, ön test sonuçlarını sabit tutarak deney ve kontrol grubu yaratıcı düşünme becerileri aritmetik ortalamalarındaki artışın anlamlılığını sınamak üzere yapılan kovaryans analizi; zihin haritalama yapan çocukların yapmayan çocuklara göre daha fazla ilerleme gösterdiklerini açığa çıkarmıştır. Araştırma sonucunda zihin haritalama çalışmalarının okul öncesi dönem çocuklarının yaratıcılık becerilerinin gelişmesinde etkili bir strateji olduğu ortaya konmuştur

Determinants of Simplicity Behaviors: Effects on Sustainable Consumption and Life Satisfaction

Sustainable consumption gains popularity in recent years that mainly purposes monitoring production activities in terms of environmental and natural resources and prevention or minimizing overconsumption patterns based on materialistic culture. In the study, sustainable consumption and voluntary simplicity behavior of American consumers were analyzed and proposed a structural equation model which describes antecedents of the sustainable behaviors and its effects on life satisfaction.The results of the study fill an important gap in the literature when considering the scope and originality of the proposed model, and elaborate the direct and indirect relationships among the related variables. In the analyzes, voluntary simplicity behaviors were evaluated in three dimensions as common simplicity behavior, conscious buying behavior and conscious product usage, and the effects of these variables on life satisfaction and affecting sustainable consumer behavior were revealed. In addition, negative motivations for earning money, level of materialism, perceived consumer effectiveness and environmentalist behaviors are important determinants of sustainable behavior and life satisfaction

Proceedings of the Conference on Human and Economic Resources

The equilibrium concept is the most important subject for economic theory. The importance of this concept arises in determination of functional structures of the economic variables. Jenkinson (1986) has estimated the long term labour demand function and rationalisation mechanism by using co-integration technique. By focusing on different aspects of rationalisation mechanism in the long run and time series econometrics in formulating and testing this relationship, ACMS (Arrow, Chenery, Minhas, Solow), CES (Constant Elasticity of Substitution) Production Function and co-integration technique are to be employed in this research in particular. The purpose of this research is to investigate whether the long-run equilibrium implied by profit maximization is valid for the Turkish manufacturing industry for the period of 1950-2001 or not. During this period, Turkish economy has undergone important structural changes, for example the implementation of liberalization policies after 1980s. Thus, the possible effects of economic policy implementation over the profit maximization in the Turkish Manufacturing sector will also be studied by using new time series techniques such as Zivot and Andrews(1992) unit root test and Gregory-Hansen (1996) co-integration tests. Because most of the previous studies about this issue are concentrated in developed countries and there has been little research on Turkish manufacturing sector, this study’s contribution is important.manufacturing industry, Turkey, CES

The effectiveness of improved global warming project for 5-6 year-old children attending pre-school

AbstractIn this study educational aims appropriate for executing Global Warming project and various activity samples to realize such aims are applied to pre-school children. The study is experimental and is based on data obtained from test and control groups. 5-6 year-old children attending pre-school are randomly assigned to test and control groups of 15 children. The test group is specifically presented with the program prepared for the Global Warming Project while the same subject is presented to the control group with a conventional approach. The data of the children in both test and control groups are measured with a survey, preliminary and post testing. At the preliminary and post testing evaluation the children are also face-to-face presented with a question list. The data were evaluated with appropriate statistical analysis methods and the results were discussed at a debate on what needs to be done to develop the program further

Carbon dioxide methanation over hydrotalcite-based nickel catalysts

Global warming and energy shortage have driven modern society to search for alternative and sustainable energy sources to replace with the fossil fuels. Innovative solutions are required for mitigating CO2 emissions to the atmosphere and storing H2 due to the intermittency of the renewable energy sources. With this thesis, it is possible to cover both of these concerns at the same time while utilizing CO2 to produce CH4 as a synthetic fuel that could also be transported into already existing infrastructures or as a chemical compound that could store H2. Hydrotalcite-based nickel catalysts were synthesized via various techniques such as wet impregnation, co-precipitation and sol-gel with different nickel contents utilising a one-pot synthesis approach. The main approach of utilizing catalysts was with the washcoating of the newly synthesized catalysts inside the reactor tubes with a diameter of 4 mm and a length of 17.5 cm. Catalytic performance of the catalysts was investigated for the hydrogenation of carbon dioxide under atmospheric pressure in a temperature range of 250-500oC. These synthesized catalysts were compared with a Ni/Al2O3 catalyst, which was prepared as a benchmark, in terms of CO2 conversion-to-CH4. Additionally, throughout this thesis, the effect of many parameters to the performance of the catalysts had been studied, including but not limited to, nickel content, GHSV, catalyst amount, reduction temperature and the addition of Ce as well as Zr. Furthermore, the stability of the catalysts was investigated through long-term tests. The CO2 methanation was already initiated below 220oC (XCO2=10.2 %, SCO2=98.4 %) which was ~100oC lower than that over Ni/Al2O3 and reached 80% conversion of CO2 at 300oC with 99.9 % selectivity of CH4 on 15 w% Ni/Mg/Al HT by co-precipitation method. When further increment in the temperature, at 350oC a complete conversion (99.5 %) of CO2 was achieved with ~100 % of CH4 selectivity. The catalysts were also utilised as packed-beds, among those 5 w% Ni/Mg/Al HT by sol-gel showed the highest activity at 300oC, 95.0% conversion of CO2 with 99.8% CH4 selectivity. The performance of the catalysts reduced with an increase in GHSV, while enhanced catalytic activity results obtained in the presence of excess amount of H2 in the feeding gas mixture. Furthermore, additional catalyst amount which was assured by repeating washcoating cycles significantly improved the activity results. Finally, long-term tests proved a good stability of the catalysts. This superior performance of hydrotalcite-based nickel catalysts could decrease the reaction temperature of CO2 methanation to lower temperatures and replace the usage of expensive Ru-based catalysts and conventional Ni catalysts supported on various oxides