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Study on the precision of boron in waste water and sludgein the city wastewater treatment plant on membranefilter
No full textYÖK Tez: 680053Pervaporasyon; ayırması zor olan sıvı çözeltilerin bir membran yardımı ile ayrılmasını ve geri kazanılmasını sağlayan ekonomik, çevreci, düşük enerjili bir yöntemdir. Bu çalışmada; doğal polimer olan poli(vinilalkol) (PVA)/CS-g-PDMAAm (poli(N,N-dimetilakrilamit)) membranları kullanılarak bor/su karışımlarının pervaporasyon yöntemi ile ayrılmıştır. Pervaporasyon deneylerinde; sıcaklığın, derişim etkisinin, membran kalınlığının, membran aşı oranının, pH etkisinin, deriştirme verimi ve akı üzerine etkisi incelenmiştir. Çalışma sonucunda, ideal sıcaklık 25 ?C olarak bulunmuştur. CS-g-PDMAAm yüzdesinin artmasıyla deriştirme verimi ve akı değerlerinin arttığı gözlenmiştir. En iyi deriştirme verimi değeri %149,7 ve bu değerdeki akı 1,51 kg/m2h olarak bulunmuştur. Membran kalınlığı 45µm'de en iyi deriştirme verimi değeri %162,8 ve bu değerdeki akı 1,70 kg/m2h olarak bulunmuştur. Besleme çözeltisindeki su miktarı arttıkça deriştirme verimi değerlerinin arttığı görülmüştür. PVA/CS-g-PDMAAm membranı seçici olarak suya karşı geçirgendir. CS-g-PDMAAm yüzdesinin artmasıyla deriştirme verimi ve akı değerlerinin arttığı gözlenmiştir. En iyi deriştirme verimi değeri %149,7 ve bu değerdeki akı 25 ?C'de, pH 6,5'de 45µm kalınlığına sahip membranda 1,51 kg/m2h olarak bulunmuştur. Bulunan optimum pervaporasyon şartlarında atıksu arıtma tesisinden alınan numuneler ile SRM örnekleri üzerinde analiz edilmiştir.Pervaporation; It is an economical, environmentally friendly, low-energy method that enables the separation and recovery of liquid solutions that are difficult to separate with the help of a membrane. In this study; The natural polymer poly(vinylalcohol) (PVA)/CS-g-PDMAAm (poly(N,N-dimethylacrylamide)) membranes were separated by pervaporation method of boron/water mixtures. In pervaporation experiments; The effects of temperature, concentration effect, membrane thickness, membrane graft ratio, pH effect on concentration efficiency and flux were investigated. As a result of the study, the ideal temperature was found to be 25 ?C. It was observed that the concentration efficiency and flux values increased with increasing CS-g-PDMAAm percentage. The best concentration efficiency value was 149.7% and the flux at this value was found to be 1,51 kg/m2h. At the membrane thickness of 45µm, the best concentration efficiency value was found to be 162.8% and the flux at this value was found to be 1.70 kg/m2h. It was observed that the concentration efficiency values increased as the amount of water in the feed solution increased. The PVA/CS-g-PDMAAm membrane is selectively permeable to water. It was observed that the concentration efficiency and flux values increased with increasing CS-g-PDMAAm percentage. The best concentration efficiency value was 149.7%, and the flux at this value was found to be 1,51 kg/m2h at 25 ?C, pH 6.5 in the membrane with 45µm thickness. The optimum pervaporation conditions found were analyzed on the samples taken from the wastewater treatment plant and on the SRM samples
On a variational problem due to the B-Darboux frame in Euclidean 3-space
No full textIn this paper, we introduce a new frame which is called the B-Darboux frame on a surface in Euclidean 3-space. We know that the parallel transport frame is derived from the Frenet frame along a space curve on a surface. Analogously, we derive the B-Darboux frame from the Darboux frame along a space curve on a surface in Euclidean 3-space. Then, we obtain the intrinsic equations due to the B-Darboux frame for a generalized relaxed elastic line on an oriented surface and give some applications of this obtained results in Euclidean 3-space
A qualitative research on working conditions in the tourism sector in terms of decent work standards
No full textYÖK Tez: 669855Bu tez çalışması ile turizm faaliyetinde bulunan farklı işletmelerdeki çalışanların çalışma koşullarının Düzgün İş bağlamında incelenmesi hedeflenmiştir. Bu çerçevede ILO'nun belirlediği Düzgün İş standartlarının dört temel boyutu olan istihdam, çalışanların temel hakları, sosyal güvenlik ve sosyal diyaloğun turizm sektöründe ne ölçüde uygulandığı gösterilmektedir. GSYİH'in yaklaşık %4'ü gibi önemli bir kısmında yer alan turizm, aynı zamanda istihdam alanı yaratma noktasında da oldukça başarılı bir sektördür. Dolayısıyla ekonomik büyüklüğü ve çalışan sayıları da dikkate alındığında bu sektör, çalışanlarının Düzgün İş'e ne ölçüde uyduğunun incelenmesinin ihtiyacını ortaya çıkarmıştır. Tezin alan çalışması Balıkesir ilinin Ayvalık ilçesinde turizm alanında faaliyet gösteren otel, kafe, restoran gibi işletmelerde çalışan farklı demografik özelliklere sahip 25 kişi ile derinlemesine mülakat yaparak ve yazar tarafından bir otelde katılımlı gözlem tekniği uygulanarak gerçekleştirilmiştir.With this thesis, it is aimed to examine the working conditions of employees in different business esengaged in tourism activities in the context of Decent Work. In this framework, it is shown to what extent employment, fundamental rights of employees, social security and social dialogue are implemented in the tourism sector, which are the four basic dimensions of Decent Work standards determined by the ILO. Tourism, which is an important part of GDP like 4%, is also a very successful sector in terms of creating employment. Therefore, considering its economic size and the number of employees, this sector has revealed the need to examine the extent to which its employees comply with Decent Work. The field study of the thesis was carried out by conducting in-depth interviews with 25 people with different demographic characteristics working in businesses such as hotels, cafes and restaurants operating in the tourism field in Ayvalık district of Balıkesir, and by applying the participatory observation technique in a hotel by the author
On the system of double equations with three unknowns d + ay + bx + cx2 = z2, y + z = x2
No full textThe system of double equations with three unknowns given by d + ay + bx + cx2 = z2, y + z = x2 is analysed for its infinitely many non-zero distinct integer solutions. Different sets of integer solutions have been presented. A few interesting relations among the solutions are given. © 2021, Semnan University, Center of Excellence in Nonlinear Analysis and Applications. All rights reserved
Facile preparation of commercial Bi2O3 nanoparticle decorated activated carbon for pseudocapacitive supercapacitor applications
No full textIn this work, a facile method to prepare Bi2O3 decorated activated carbon (Bi2O3@AC) composites with high pseudocapacitive properties was presented. The inorganic-organic composites synthesized using commercial Bi2O3 and active carbon with different weight ratio. The composites were assessed using spectroscopic, microscopic, and diffractive techniques. Our assessments confirmed that active carbons were successfully doped with commercial Bi2O3 nanoparticles with different dopant rates. The electrochemical performance of as-prepared materials was researched by cyclic voltammetry, chronopotentiometry, and electrochemical impedance spectroscopy in 6 M KOH electrolyte. Higher specific capacitance was achieved for increased Bi2O3 nanoparticle in composites. The 20%-Bi2O3@AC had a maximum specific capacitance of 565 F/g at a current density of 1 A/g. In addition, the symmetrically assembled supercapacitor delivers a high energy density (23.0 Wh kg(-1)). Moreover, 67% of the initial capacitance is maintained after 1500 cycles at 200 mV/s, suggesting good cycling stability. Due to the synergistic effect of compositing a promising electrochemical performance was observed that was not obtained by bare AC or Bi2O3. As a result, the electrochemical properties of 20%-Bi2O3@AC composite is promising and it may be used as potential electrode for supercapacitor.Kirklareli University Scientific Research Coordination Office [KLUBAP 207]; Krklareli University, Turkey [KLUBAP-139]Part of the project was supported Kirklareli University Scientific Research Coordination Office with project number KLUBAP 207. This study was partly supported by the Krklareli University, Turkey (Grant No. KLUBAP-139)
Impact of the Covid-19 pandemic on perinatal mental health (Riseup-PPD-COVID-19): protocol for an international prospective cohort study
No full textBackgroundCorona Virus Disease 19 (COVID-19) is a new pandemic, declared a public health emergency by the World Health Organization, which could have negative consequences for pregnant and postpartum women. The scarce evidence published to date suggests that perinatal mental health has deteriorated since the COVID-19 outbreak. However, the few studies published so far have some limitations, such as a cross-sectional design and the omission of important factors for the understanding of perinatal mental health, including governmental restriction measures and healthcare practices implemented at the maternity hospitals. Within the Riseup-PPD COST Action, a study is underway to assess the impact of COVID-19 in perinatal mental health. The primary objectives are to (1) evaluate changes in perinatal mental health outcomes; and (2) determine the risk and protective factors for perinatal mental health during the COVID-19 pandemic. Additionally, we will compare the results between the countries participating in the study.MethodsThis is an international prospective cohort study, with a baseline and three follow-up assessments over a six-month period. It is being carried out in 11 European countries (Albania, Bulgaria, Cyprus, France, Greece, Israel, Malta, Portugal, Spain, Turkey, and the United Kingdom), Argentina, Brazil and Chile. The sample consists of adult pregnant and postpartum women (with infants up to 6months of age). The assessment includes measures on COVID-19 epidemiology and public health measures (Oxford COVID-19 Government Response Tracker dataset), Coronavirus Perinatal Experiences (COPE questionnaires), psychological distress (BSI-18), depression (EPDS), anxiety (GAD-7) and post-traumatic stress symptoms (PTSD checklist for DSM-V).DiscussionThis study will provide important information for understanding the impact of the COVID-19 pandemic on perinatal mental health and well-being, including the identification of potential risk and protective factors by implementing predictive models using machine learning techniques. The findings will help policymakers develop suitable guidelines and prevention strategies for perinatal mental health and contribute to designing tailored mental health interventions.Trial registrationClinicalTrials.gov Identifier: NCT04595123.COST Action RiseupEuropean Cooperation in Science and Technology (COST) [PPD CA 18138]; COST under COST Action Riseup [PPD CA18138]; Spanish Ministry of HealthInstituto de Salud Carlos IIISpanish Government; Institute of Health Carlos IIIInstituto de Salud Carlos III; European Regional Development Fund > by the Prevention and Health Promotion Research Network 'redIAPP' [RD16/0007]; FSEEuropean Social Fund (ESF); FCTPortuguese Foundation for Science and TechnologyEuropean Commission [SFRH/BPD/117597/2016]; Bar-Ilan Dangoor Centre for Personalized Medicine, Israel; Portuguese Foundation for Science and Technology (FCT)Portuguese Foundation for Science and Technology; EU through the European Social Fund; Human Potential Operational Program [IF/00750/2015]; CAPES/ProexCoordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [0653/2018]; CAPES/PrInt grant [88887.310343/2018-00]The project is part of the COST Action Riseup-PPD CA 18138 and was supported by COST under COST Action Riseup-PPD CA18138; also, by the Spanish Ministry of Health, the Institute of Health Carlos III, and the European Regional Development Fund > by the Prevention and Health Promotion Research Network `redIAPP' (RD16/0007). Raquel Costa is supported by the FSE and FCT under an individual Post-Doctoral Grant SFRH/BPD/117597/2016. Rena Bina and Drorit Levy received funding from the Bar-Ilan Dangoor Centre for Personalized Medicine, Israel. Ana Mesquita is supported from the Portuguese Foundation for Science and Technology (FCT) and from EU through the European Social Fund and from the Human Potential Operational Program -IF/00750/2015. Ana Osorio received financial support from CAPES/Proex no. 0653/2018 and CAPES/PrInt grant no. 88887.310343/2018-00.The funders of the study had no role in the study design or the writing the protocol. The corresponding author had final responsibility for the decision to submit for publication
History teachers' opinions about the 10th grade history textbook
No full textYÖK Tez: 690892Bu çalışmanın amacı 2018 yılında Milli Eğitim Bakanlığı tarafından yapılan müfredat değişikliği ile hazırlanan yeni 10. sınıf tarih ders kitabının öğretmenler tarafından nasıl değerlendirildiğini tespit etmektir. Çalışma sırasında Doç. Dr. Bülent Akbaba tarafından geliştirilen "Ders Kitabı İnceleme Formu" kullanılmıştır. Çalışma evreni Türkiye'deki İlgi Yayınları 10. sınıf tarih ders kitabını kullanan tarih öğretmenleridir. Çalışmanın örneklemini ise Kırklareli ili tarih öğretmenleri oluşturmaktadır. Kırklareli Milli Eğitim Müdürlüğü'nden aldığımız verilere göre Kırklareli ilinde 68 tarih öğretmeni bulunmaktadır. Bu öğretmenlerden toplam 56 tarih öğretmeni ankete katılmıştır. Örneklem seçimi yapılırken "küme örnekleme" tekniği tercih edilmiştir. Toplanan verilerin analizi için IBM SPSS Statistics 20 programından yararlanılmıştır. Toplanan verilere ait tanımlayıcı istatistikler ayrıntılı olarak verilmiştir. Yapılan Bağımsız örneklem t-testi, Mann-Whitney U Testi, One-Way ANOVA ve Kruskal-Wallis H Testi ile "Yaş", "Meslekteki Çalışma Yılı", "Mezun Olduğu Bölüm"değişkenlerine göre öğretmenlerin "Lise Tarih Ders Kitaplarını Değerlendirme" konusuna ilişkin tutum düzeylerinin istatistiksel olarak anlamlı farklılık gösterip göstermediği araştırılmış, anlamlı bir fark bulunamamıştır.The aim of this study is to determine how teachers evaluate the new 10th grade history textbook, which was prepared with the curriculum change made by the Ministry of Education in 2018. During the study, " The Textbook Review Form" developed by Assoc. Prof. Bülent Akbaba was used. The universe of the study is history teachers in Turkey who Interest Publications 10th grade history textbook users. The sample of the study consists of the history teachers of Kırklareli. According to the data received from the Kırklareli Directorate of National Education, there are 68 history teachers in Kırklareli. A total of 56 history teachers from these teachers participated in the survey. Cluster sampling method was preferred while choosing the sample. IBM SPSS Statistics 20 program was used to analyze the collected data. Descriptive statistics of the collected data were given in detail. Also independent sample t-test, Mann-Whitney U test, One-Way ANOVA and Kruskal-Wallis H Test were performed to find if there had been statistically significant differences in attitude levels of the teachers regarding their opinions on "Evaluation of High School History Textbooks" based on "Age", "Professional seniority(years)", and "Depatment of Graduation)". No significant difference found. No statistically significant difference found
Effect of grape pomace usage in chocolate spread formulation on textural, rheological and digestibility properties
No full textIn this study, dried grape (Cabernet sauvignon) pomace (DGP) as a by-product of wine production was used in the chocolate spread (CS) instead of various amounts of sugar and milk originated powders (MOP; skimmed milk and demineralized whey powder 1:1, w/w). The formulations of CS samples were determined using mixture design method. The sugar, MOP and DGP concentrations changed between 35 and 50, 0.066-8.000 and 0.23-15 g/100 g, respectively. According to the results, the consistency coefficient (K) and flow behavior index values of CS samples changed between 8.10 and 28.50 Pas.s(n) and 0.52-0.71, respectively. In addition, firmness and spreadability parameters were determined between 0.80-1.42 N and 2.15-4.24 N mm, respectively. Total phenolic content in CS samples ranged from 3415 to 13,754 mg GAE/kg and their digestibility ranged between 25% and 84%. Also, the digestibility of resveratrol was determined between 47.6% and 95.7% at different DGP concentrations. All of the established models successfully described the relation with R-2 values higher than 0.800. Textural and rheological parameters as well as sensory characteristics of the samples indicated that DGP may be used as a healthy and low-cost ingredient in CS formulation to partially substitute sugar and MOP.Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [TOVAG-2170054]This work was funded by the Scientific and Technological Research Council of Turkey (TUBITAK), Project No: TOVAG-2170054
The Investigation of the Effect of Sulfur Dioxide Levels on Deaths in the City Center of Kırklareli
No full textHava kirliliği, çeşitli kimyasal süreçler sonucunda oluşan ürünler tarafından havanın doğal bileşiminin bozulmasıdır. Bu bozulma biyolojik çeşitliliği ve doğal yaşamı olumsuz yönde etkilemektedir. Hava kirliliğine sebep olan hava kirleticilerinin maruz kalma süresi, derişim ve kimyasal özelliklerine bağlı olarak insan sağlığı üzerinde olumsuz etkileri bulunmaktadır. Bu çalışmanın amacı; hava kirliliğine sebep olan moleküllerden biri olan kükürt dioksitin Kırklareli il merkezindeki ölümler üzerine etkisinin incelenmesidir. Araştırma örneklemini, Kırklareli il merkezindeki 01.02.2014-31.01.2019 tarihleri arasında gerçekleşen, 18-85 yaş arasındaki 1381 bulaşıcı olmayan doğal ölüm vakası oluşturmuştur. Kükürt dioksit (SO2) seviyelerine ilişkin veriler Çevre ve Şehircilik Bakanlığının hava kalitesi izleme ağının internet sitesinden sağlanmıştır. Kükürt dioksit seviyelerinin, belirtilen tarihlerdeki aylara göre dağılımı ve ölüm sayıları ile olan bağıntısının saptanması SPSS 22.0 yazılımı kullanılarak gerçekleştirilmiştir. Araştırmanın analiz sonuçlarında 2014-2019 yılları arasındaki bazı aylarda kükürt dioksit (SO2) düzeyleri Dünya Sağlık Örgütü’nün (DSÖ) belirlediği sınır değerinin üzerinde olsa da yıllık ortalamaların sınır değerlerinin altında kaldığı açıkça gözükmektedir. Ölüm sayılarının yıllara göre değişimi ile yıllık ortalama kükürt dioksit seviyeleri arasındaki bağıntının değerlendirilmesi, yorumlanması ve kıyaslanması bu sınır değerleri göz önüne alınarak yapılmıştır.Air pollution is the deterioration of the natural composition of air by products that are formed as a result of various chemical processes. This deterioration adversely affects biological diversity and natural life. Air pollutants which cause air pollution have negative effects on human health depending on their exposure time, concentration and chemical properties. The aim of this study is to investigate the effect of the levels of sulfur dioxide, which is one of the molecules that cause air pollution, on deaths in the city center of Kırklareli. The research sample has been constituted of 1381 non-contagious natural death cases between the ages of 18-85, which took place on the dates between 01.02.2014 and 31.01.2019 in the city center of Kırklareli. Data about sulfur dioxide (SO2) levels were obtained from the air quality monitoring network website of the Ministry of Environment and Urbanization. Determination of the distribution of sulfur dioxide levels by months in stated dates and their relation with the number of deaths have been carried out by using SPSS 22.0 software. It is obviously seen from the research results that although the sulfur dioxide (SO2) levels in some months between 2014 and 2019 were above the limit value set by the World Health Organization (WHO), the annual averages remained below those limit values. The evaluation, interpretation and comparison of the relationship between the changes in the number of deaths by years and the annual average sulfur dioxide levels have been accomplished by considering these limit values
Çocuk ve Ergen Psikiyatri polikliniğine başvuran Dikkat Eksikliği ve Hiperaktivite tanılı 8-11 yaş grubu çocukların anneye bağlanma stilleri ile algıladıkları stres düzeyleri arasındaki ilişkinin incelenmesi
No full textYÖK Tez: 689834Bu araştırmada DEHB tanılı 8-11 yaş grubu çocukların anneleriyle bağlanma stilleri ve algıladıkları stres arasındaki ilişki incelenmesi amaçlanmıştır. Çalışma grubuna Kırklareli Eğitim ve Araştırma hastanesi Çocuk ve Ergen Psikiyatri Polikliniğine başvuran 105 gönüllü çocuk katılmıştır. Araştırmada kolay ulaşılabilir örnekleme yöntemi kullanılmıştır ve araştırma ilişkisel tarama modelindedir. Araştırmaya başlamadan önce gönüllüler bilgilendirilmiş ve onam formlarını doldurmaları istenmiştir daha sonrasında sosyodemografik form, Yakın İlişkilerde Yaşantılar Envanteri –II Orta Çocukluk Ölçeği (YİYE II) ve Çocuklarda (8-11 Yaş) Algılanan Stres Ölçeğini doldurmaları istenmiştir. Uygulanan ölçekler ve elde veriler SPSS – 25 paket programına işlenmiştir. Araştırma bulgularına göre çocukların anneye bağlanma stillerinde kaygı- kaçınma ve genelinde bağlanma orta düzeyde bulunmuştur. Çocukların algıladıkları stres düşük düzeydedir. Anneye bağlanma ve çocukların algıladıkları stres arasındaki ilişkide ise kaygı boyutunda pozitif yönde orta düzeyde kaçınma boyutunda pozitif yönde düşük düzeyde genelinde ise algılanan stres arttıkça bağlanmanın azaldığı bulunmuştur. Annelerin yaş grubuna göre 34-39 yaş grubunda anneye sahip çocuklarda, çalışma durumuna göre, annesi çalışan çocuklarda, cinsiyetlerine göre erkek çocuklarında, kronik rahatsızlığa sahip olma durumunda kronik rahatsızlığı olmayan çocuklarda, okul başarısına göre okul başarısı yüksek çocuklarda, genel bağlanma düzeylerinin daha yüksek olduğu bulunmuştur. Annelerin yaş grubuna göre genç yaşta anneye sahip çocuklarda, okul başarısına göre okul başarıları düşük çocuklarda, kronik rahatsızlığa sahip olma durumunda kronik rahatsızlığı bulunan çocukların algıladıkları stresin daha yüksek olduğu bulunmuştur.In this study, aimed to examine the relationship between attachment styles and perceived stress with the mothers of children aged 8-11 with ADHD. 105 volunteers who applied to Kırklareli Training and Research Hospital Child and Adolescent Psychiatry Outpatient Clinic participated in the study group. The data was reached with the sampling method, which can be found easily in the study, and the research isin the relational survey model.Before starting the study, the volunteers were informed and asked to fill in the consent forms, after which they were asked to fill the Sociodemographic form, the Experiences in Close Relationship Inventory-II, the Middle Childhood Scale (ERA II) and the Perceived Stress Scale in Children (8-11 Years). The applied scales and obtained data were processed in SPSS - 25 package program. According to the findings of the study, anxiety-avoidance and overall attachment were found to be moderate in the attachment styles of children to their mothers. Perceived stress by children is low. In the relationship between mother attachment and perceived stress by the children, it was found that the anxiety dimension was positively moderate, and the avoidance dimension was positively low, and as the perceived stress increased, attachment decreased. General attachment levels are higher in children with mothers in the age group 34-39 according to the age group of the mothers, in children with working mothers, in boys by gender, in children without chronic disease in the case of chronic disease, in children with higher school success than in school success has been found. It has been found that the perceived stress of children with chronic illness is higher in children with young mothers than in the age group of mothers, in children with low school achievement according to school success, and in children with chronic illness