Mobil Uygulamalar Aracılığıyla Probleme Dayalı Matematik Öğretiminin Başarıya Etkisi

The purpose of this study is to determine the effects of problem based mathematics teaching through mobile based applications which are used as assistive technology. It has been designed in a mixed method model that integrates research results. The participants of the experimental group were chosen from the students who continue to take mathematics courses within the traditional curriculum and were included in the process of problem based learning via mobile applications. Quantitative dimension of the study was designed using quasi-experimental design with pretest-posttest control group and it was seen that the success of the students in two different environments showed significant difference before and after the experiment. In other words, it has been found that the common effects of successive measurement factors on the success of different learning environments are significant. Within the light of these findings, it has been determined that both learning environments have different effects in increasing the success of the students and that the environment created for the experimental group is more effective in increase of the success. As a result of the qualitative analysis of the data collected by the researcher through the open-ended questionnaire, it was seen that the students reported positive opinions towards the environment (mobile technology, WhatsApp or virtual stock exchange application) and problem based teaching process. Based on these results, it can be asserted that the problem based learning process in which mobile based applications are used as an assistive technology is effective both in the increase of students’ success in maths and their positive attitudes.Mobil tabanlı uygulamaların yardımcı teknoloji olarak kullanıldığı probleme dayalı öğrenme sürecinin matematik başarısına etkisi ve öğrenci görüşlerinin belirlenmesinin amaçlandığı bu çalışma, araştırma sonuçlarını bütünleştiren karma yöntem modelinde tasarlanmıştır. Geleneksel öğretim programı kapsamında matematik dersini almaya devam eden öğrencilerden, deney grubunu oluşturanlar kontrol grubundan farklı olarak mobil uygulamalar aracılığı probleme dayalı öğrenme sürecine dahil edilmiştir. Nicel boyutu öntest-sontest kontrol gruplu yarı deneysel desen olarak tasarlanan çalışmada iki ayrı ortamda öğrenim gören öğrencilerin başarılarının deney öncesinden deney sonrasına manidar farklılık gösterdiği, başka bir ifadeyle, farklı öğrenme ortamlarında olmak ile tekrarlı ölçümler faktörlerinin başarı üzerindeki ortak etkilerinin manidar olduğu bulunmuştur. Bu bulgular çerçevesinde her iki öğrenme ortamının öğrencilerin başarılarını artırmada farklı etkilere sahip olduğu ve deney grubu için oluşturulan ortamın öğrencilerin başarılarını artırmada daha etkili olduğu belirlenmiştir. Çalışmanın, açık uçlu soru formu aracılığıyla toplanan verilerin, içerik analizi teknikleriyle çözümlendiği nitel boyutunda ise; süreç içerisinde kullanılan ortam (mobil teknoloji, WhatsApp ya da sanal borsa uygulaması) ve probleme dayalı öğretim sürecine yönelik öğrencilerin olumlu görüş bildirdikleri görülmüştür. Elde edilen bu sonuçlar doğrultusunda mobil tabanlı uygulamaların yardımcı teknoloji olarak kullanıldığı probleme dayalı öğrenme sürecinin öğrencilerin matematik başarılarını arttırmada ve olumlu tutum geliştirmelerinde etkili olduğu söylenebilir

Ortaöğretim Öğrencilerine Yönelik Bilgi Güvenliği Farkındalık Ölçeği (BGFÖ) Geliştirme Çalışması

Bu çalışmanın amacı, ortaöğretim kurumlarında öğrenim gören öğrencilerin bilgi güvenliği farkındalık düzeylerini belirlemeye yönelik bir ölçek geliştirmektir. Araştırma, ortaöğretim kurumlarında öğrenim gören 607 öğrenciyle gerçekleştirilmiştir. Çalışmanın ilk aşamasında, 407 kişilik katılımcı grubu ile açımlayıcı faktör analizi (AFA) yapılmıştır. AFA sonucunda, ölçeğin 36 madde ve 3 alt boyuttan (“saldırı ve tehditler: St”, “mahremiyet: Ma” ile “kişisel verilerin korunması: Kvk”) oluştuğu belirlenmiştir. Çalışmanın ikinci aşamasında, 200 kişilik katılımcı grubu ile gerçekleştirilen doğrulayıcı faktör analizi (DFA) sonucunda 3 faktörlü yapı doğrulanmıştır. Ölçeğin tamamı için Cronbach alfa güvenirlik  katsayısı .955; her alt boyut için sırasıyla St:.954, Ma:.890 ile Kvk:.808’dir. Bu çalışma sonucunda ortaöğretim kurumlarındaki öğrencilerin bilgi güvenliği farkındalık düzeylerini belirlemek için kullanılabilecek geçerli ve güvenilir bir ölçek geliştirilmiştir. Ayrıca geliştirilen ölçek üzerinde yapılan analizler sonucunda öğrencilerin bilgi güvenliği farkındalıkları ile cinsiyetleri arasında anlamlı bir farklılığın olduğu belirlenmiştir

Oxidative stress and antioxidant defense in patients with chronic hepatitis C patients before and after pegylated interferon alfa-2b plus ribavirin therapy

BACKGROUND: Oxidative stress could play a role in pathogenesis of hepatitis C virus (HCV) infection. The aim of our study is to determine oxidant/antioxidant status of patients with chronic hepatitis C (CHC), and the effect of pegylated interferon alfa-2b plus ribavirin combination therapy on oxidative stress. METHODS: Nineteen patients with chronic HCV infection and 28 healthy controls were included in the study. In control and patient groups, serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels, erythrocyte malondialdehyde (MDA) levels, erythrocyte CuZn-superoxide dismutase (SOD), erythrocyte glutathione peroxidase (GSH-Px) activities were measured. After pegylated interferon alfa-2b and ribavirin combination therapy for 48 weeks, these parameters were measured again in the patient group. RESULTS: Serum MDA levels increased significantly in CHC patients (n:19), before the treatment when compared with healthy subjects (n:28) 9.28 ± 1.61, 4.20 ± 1.47 nmol/ml, p < 0.001 respectively. MDA concentration decreased significantly (p < 0.001) after the treatment as well as ALT, AST activity, in erythrocytes of these patients. Average antioxidant enzymes (superoxide dismutase and glutathione peroxidase) were significantly lower in erythrocytes of patients with CHC before treatment compared with the control group (both, p < 0.001). Chronic Hepatitis C patients after pegylated interferon alfa-2b and ribavirin therapy showed values of SOD, GSH-Px were significantly higher than pretreatment levels (both, p < 0.001). CONCLUSION: Our results show that patients with chronic HCV infection are under the influence of oxidative stress associated with lower levels of antioxidant enzymes. These impairments return to level of healthy controls after pegylated interferon alfa-2b plus ribavirin combination therapy of CHC patients. Although interferon and ribavirin are not antioxidants, their antiviral capacity might reduce viral load, and inflammation, and perhaps through this mechanism might reduce virus-induced oxidative stress

Öğrencilerin İnternet Kısıtlamalarına Karşı Geliştirdikleri Yöntemlerin Belirlenmesi

Öğrencilerin çevrimiçi ortamda getirilen kısıtlamaları etkisiz bırakabilecek yöntemlerinin belirlenmesinin amaçlandığı çalışma, tarama modelinde tasarlanmıştır. Çalışma grubunun belirlenmesinde amaçlı rastgele örneklem yaklaşımın benimsendiği araştırma, FATİH projesinin uygulandığı ortaöğretim kademesindeki okullarda öğrenimlerine devam eden 297 öğrenciyle gerçekleştirilmiştir. Kapalı ve açık uçlu sorulardan oluşan veri toplama formu aracılığıyla elde edilen veriler, içerik analizi türlerinden kategorisel ve frekans analizi teknikleri ile çözümlenmiştir. Gerçekleştirilen analizler sonucunda öğrencilerin büyük bir kısmının internet ortamında kısıtlanmış sayfalar ya da uygulamalarla karşılaştıkları ve neredeyse üçte birinin ise kısıtlamalara karşı çözüm yöntemlerinin var olduğunu belirttikleri görülmüştür. Öğrencilerin internet ortamında kısıtlanmış sayfalar ve uygulamalara girmek için ise sırasıyla%253B kurulum gerektiren uygulamaları (programlar%252Ftarayıcılar), tarayıcı eklentilerini, internet ayarlarını (DNS) değiştirmeyi ve özel tasarlanmış (Web Proxy servisleri) web sayfalarını tercih ettikleri belirlenmiştir. Çalışmada elde edilen sonuçlar çevrimiçi ortamlara yönelik getirilen kısıtlamaların tam anlamıyla amacına ulaşmadığını ve gençlerin kısıtlamalara karşı yine internet ortamından elde edilen bilgiler ya da uygulamalar aracılığıyla çözüm üretebildiklerini göstermektedir. Bu sonuçlar, çevrimiçi ortamda yapabildiklerini kısıtlayarak, özgürlüklerine sınırlandırma getirildiğini hisseden gençlerin çok daha riskli çözümler üretmelerine neden olabileceğinin göz ardı edilmemesi gerekliliğini ortaya koymaktadır

Life cycle assessment and greenhouse gas emission evaluation from Aksaray solid waste disposal facility

WOS: 000435421100006Life cycle assessment (LCA) is a popular tool used to assess the environmental performance of municipal solid waste (MSW) management systems. In this study, LCA method was used to determine the best municipal solid waste management strategy for Aksaray city, Turkey. Four different scenarios were developed as an alternative to the existing waste management system and evaluated for the best environmental solution. The scenario with 75% landfilling-25% composting provided the best results in terms of human health and environmental impact. Current emissions from the present MSW facility were estimated for methane and carbon dioxide emissions. Annual emissions in 2017 were 8674 and 3161 t year(-1) for CO2 and CH4, respectively. The estimated ground-level concentrations of these emissions were 30 and 50 mu g m(-3) for CO2 and CH4, respectively. Both modeled CO2 and CH4 concentrations were expressed as CO2(eq). The total radiative forcing was calculated as 0.021 W m(-2)

Investigation of EU environmental policies from the past to the future in the LCA perspective

*Çetinkaya, Afşin Yusuf ( Aksaray, Yazar )event Bilgili, Afşin Yusuf Çetinkaya, Sadullah Levent Kuzu Investigation of EU Environmental Policies from the Past to the Future in the LCA Perspective Introduction According to the First Law of Thermodynamics, energy can be transformed from one form to another but can be neither created nor destroyed. This law tells us that there is a great balance of energy in nature. This energy balance appears not only in engineering but also in all environmental, social and economic cycles. Humanity, like all other living things in nature, has lived in harmony with environmental cycles in nature for millennia, and there is no waste in any environmental cycle. The energy entering the system does not disappear, changes shape and emerges as another type of energy. The waste products generated during this change process are used as input to another system and a new cycle begins. After the 18th century, when industrial production began, man-made artificial products started to produce outputs that could not be used as energy inputs in any system by disrupting this cycle, and nature was introduced to a concept that did not belong to it: Waste. Waste generation is a part of industrial production and is a process that has the potential to cause great environmental damage if not avoided

Life cycle comparison of membrane capacitive deionization and reverse osmosis membrane for textile wastewater treatment

Çetinkaya, Afşin Yılmaz ( Aksaray, Yazar )The reduced natural water sources on the one hand and the large amount of wastewater produced by the textile industry on the other hand lead to the requirement of an effective reuse of textile wastewater. In this study, the treatment of textile wastewater by the reverse osmosis membrane system and membrane capacitive deionization (MCDI) system has been investigated to improve the quality and the recovery rate of the effluent for reclamation. The maximum chemical oxygen demand (COD) removal efficiency obtained at 10 bar was 96.3% for BW30 reverse osmosis membrane. Diversified operating conditions, including working voltage and flow rate, were investigated systematically in the MCDI system which is an effective water purification technology. According to the obtained experimental results, the COD removal efficiency was thoroughly increased by rising the working voltage (from 0.2 to 1.2 V) and the flow rate (from 5 to 17.5 ml/min). The flow rate and the working voltage at which the COD from textile wastewater removal ratio was the highest were 10 ml/min and 1.2 V, respectively. A life cycle approach has also been implemented for the comparison of environmental impact assessment of the two desalination systems. In this study, a life cycle approach has been implemented for the comparison of environmental friendly impact assessment of the two desalination systems. It is concluded that MCDI system is much more environmental friendlier with 5641 times less values for damage assessment categories, on average...

Tıbbi Bir Bitki Olarak Gül

In today’s world millions of people lead a low quality of life, or even lose their lives because of highly expensive medical treatments. Cheap and accessible treatments, on the other hand, protect the continuity of human life and thus protect the health of societies. In this context, various treatment methods have been researched and the importance of herbal and plant based treatments have emerged. As a part of herbal and plant based treatments roses, which are relatively easy to grow and process, have attracted great attention. There are about 1300 species of rose. Among these, Rose Canina, also known as rosehip, and the pink, layered and aromatic Rosa Damascena, also known as “Isparta Rose” have emerged in importance as they are actively used in various treatments. Researchers have found that roses have 89 active, beneficial ingredients. The flower drums and petals are used in the treatment process. With Rosa Canina the flower drums are used. In a recent research, it was found that rose petals contain antioxidant agents. Rosewater, which is thought to nurture the soul with its fine aroma, is used in treating patients with nausea, palpitations, fainting and vertigo. We are informed that with the tasting of the plant nausea and vomiting is reduced and with drinking its water the stomach is given extra strength. Rosewater, which helps reduce headaches, also has positive effects on the workings of the brain, helping the faculty of cognition. We are also informed that rose water vapour helps in the treatment of eye diseases. Roses are also used in the treatment of mental illnesses since they are pleasant flower

Dispersion modelling of volatile organic compound emissions from Ataköy wastewater treatment plant in İstanbul

WOS: 000423283800005In this study, emissions released from a wastewater treatment plant in Istanbul, were estimated utilising air quality dispersion model. The treatment plant is located to the west of a residential site. So, the emissions have potential to affect the living people in the residential area. Emission factor and wastewater treatment capacity were used to calculate the emission rate. Turkish State Meteorological Service data were used in order to produce meteorological input to the model. Elevation data were gathered from Shuttle Radar Topography Mission data. AERMOD was executed with those input data. Hourly maximum, daily maximum, monthly maximum, and annual average concentration distribution plots were generated. The maximum values were 471, 171, and 42 mu g/m(3), on hourly, daily, and monthly basis, respectively. The maximum concentration observed on the annual average map was 29 mu g/m(3)