A FUZZY LOGIC APPROACH FOR THE ESTIMATION OF PERFORMANCE HYDROXY DRY CELL WITH DIFFERENT PLATE COMBINATION

In this study, hydroxy (HHO) dry cell with different plate combination performances in terms of current, temperature and flow rate were experimentally investigated and modeled with Rule-Based Mamdani-Type Fuzzy (RBMTF) modeling technique. Input parameters plate number and time; output parameters current, temperature and flow rate were described by RBMTF if-the rules. The dimensions of the plates were 10x10 cm2 and 11x11 cm2. Current and temperature were measured for the different plate combination. This paper presents a fuzzy logic based study for estimating the uncertainty of the HHO drycell parameters. The 80 values between 90th and 270th seconds, which are not obtained from experimental work for 10x10 cm2 and 11x11 cm2 current, temperature and flow rate are predicted by fuzzy logic method. One of the results is; the current value predicted by RBMTF for the 11-2 plate combination and t=90 s is less than the current value from the results of the experimental work for the 11-2 plate combination and t=60 s, but higher than the current value from the results of the experimental work for 11-2 plate combination and t=120s.The comparison between experimental data and RBMTF is done by using three different statistical method. These are, root mean square error (RMSE), mean absolute error (MAE) and the coefficient of multiple determination (R2). For 10x10 cm2 dimension plate, RMSE, MAE and R2 for the current is 0.13, 0.111 and 96.44% respectively. For 11x11 cm2 dimension plate, RMSE, MAE and R2 for the current is 0.07926, 0.06466 and 98.44% respectively. coefficient of multiple determinations (R2). As a result, RBMTF model has shown satisfying relation with experimental results, which suggests an alternative approach to estimation of performance HHO dry cell with different plate combination

Chemerin as a marker of subclinical cardiac involvement in psoriatic patients

Background: Chemerin has been associated with psoriasis and inflammation, but there are no studies demonstrating an association between chemerin and subclinical cardiac involvement in psoriatic patients. Therefore, the present study aimed to evaluate whether psoriatic patients with increased epicardial fat tissue, impaired flow-mediated dilatation, and diastolic dysfunction have higher serum chemerin levels than a healthy control group. Methods: The study included 60 psoriatic patients and 32 healthy controls. Echocardiographic parameters, epicardial fat tissue, flow-mediated dilatation, and chemerin levels were recorded for both groups. Results: The serum levels of chemerin in the psoriatic patients were significantly higher than in the control group. The diastolic function parameters, including isovolumic contraction and relaxation time, E’/A’ (early diastolic mitral annular velocity/late diastolic mitral annular velocity), and E/E’ (early diastolic peak velocity of mitral inflow/early diastolic mitral annular velocity) values, differed significantly between the groups. Epicardial fat tissue was significantly higher and flow-mediated dilatation was significantly lower in psoriatic patients than in the controls. Chemerin was significantly positively correlated with age, body mass index, systolic and diastolic blood pressures, waist circumference, E/E’, and epicardial fat tissue. Serum chemerin was significantly negatively correlated with E’, E’/A’, and flow-mediated dilatation. A multiple linear regression analysis showed that chemerin was independently correlated with E/E’. Conclusions: Psoriatic patients exhibit early subclinical atherosclerosis and diastolic dysfunction. Chemerin can be used as a marker to screen for patients with subclinical cardiac involvement

Toxıc Effects Of Sodıum Omadıne On The Freshwater Bıvalves

Biyosidal bir kimyasal madde olan sodyum omadin (sodyum piritiyon, NaOM), ekotoksikoloji araştırmalarında indikatör tür ve model organizma olarak kabul edilen iki farklı Bivalvia (midye) türünde uygulanmıştır. Dreissena polymorpha türünde yapılan akut toksisite deneyinde 96 saatlik LC50 değeri 0,243 μg/L olarak hesaplanmıştır. Akut toksisite bulgularımız, NaOM kimyasalının D. polymorpha için çok toksik olduğunu ortaya çıkarmıştır. Unio mancus türü üzerinde yapılan subletal testlerde 5 μg/L sodyum omadin dozuna 96 saat süreyle maruz kalan bireylerde total hemosit sayısı, kontrol grubuna göre deney grubunda artmıştır (p<0,05). MDA düzeyleri solungaç dokularında artış göstermiş (p>0,05), sindirim bezinde ise kontrole göre istatiksel olarak önemli düzeyde artmıştır (p<0,05). Deney gruplarındaki GSH seviyeleri de, hem solungaç ve hem de sindirim bezlerinde önemli düzeyde artmıştır (p<0,05). 5 μg/L sodyum omadine maruz kalan U. mancus dokuları histopatolojik olarak incelenmiştir. Kontrol grubuna ait midyelerin tüm dokuları ile deney grubundaki midyelerin gonadlar (ovaryum ve testisler), kas ve manto dokusunda herhangi bir histopatolojik bulguya rastlanmamıştır. Sindirim bezinde ise hidropik dejenerasyona, solungaçlarda ise hiperplasiye rastlanmıştır. Sindirim bezi, gonadlar ve solungaçlarda apoptozis belirlenmiştir. Apoptotik hücre sayısının, sindirim bezi ve testis dokularında kontrol grubuna göre çok daha yoğun olduğu saptanmıştır. Solungaç ve ovaryum dokularında ise önemli bir bulguya rastlanmamıştır. Elde edilen sonuçlar doğrultusunda, NaOM maddesinin genotoksik etkiler yaratabileceği belirlenmiştir.In this study, the ecotoxicological effects of sodium omadine (sodium pyrithione, NaOM), which is a biocidal chemical were investigated on two species of freshwater mussels which are considered as the selected indicator species and model organisms. In acute toxicity test on Dreissena polymorpha, LC50 value of 96 hours was calculated as 0,243 μg/L. Our acute toxicity findings revealed that NaOM chemical was very toxic to Dreissena polymorpha. Total hemocyte counts were increased in Unio mancus who were exposed to 5 μg/L NaOM for 96 hours in sublethal tests (p<0,05). MDA levels were increased in gill tissues (p>0,05) whereas it were increased significantly in the digestive gland compared to control group (p<0,05). GSH levels in the experimental groups were also increased significantly in both gill and digestive glands (p<0,05). U. mancus tissues exposed to 5 μg/L sodium omadine were examined histopathologically. No histopathologic findings were found in all tissues of mussels of control group and gonads (ovaries and testes), muscles and mantle tissues of mussels in experimental group. Hydropic degeneration was found in the digestive gland and hyperplasia was found in the gills. Apoptosis occurring in the digestive gland, gonads and gills was determined. The number of apoptotic cells in the digestive gland and testis tissues were found to be much more intense than the control group. No significant findings were found in gill and ovarian tissues. According to the results, it was determined that NaOM substance could have genotoxic effects. Scienc

Degenerate integral transforms

Bu tez beş bölümden oluşmaktadır. Birinci bölüm giriş kısmına ayrılmıştır, bu bölümde yapılan çalışmalar ve tezin genel amacı hakkında bilgiler verilmiştir. İkinci bölümde, dejenere Gamma fonksiyonu ve dejenere Laplace dönüşümü açıklanmıştır. Üçüncü bölümde, ARA integral dönüşümü açıklanarak bu dönüşümle ilgili uygulamalar verilmiştir. Dördüncü bölümde ise ARA integral dönüşümünün dejenere hali tanımlanmış ve çeşitli uygulamalar verilmiştir. Bu bölüm tezin orijinal kısmıdır. Beşinci bölüm ise tartışma ve sonuç kısmından oluşmaktadır.This thesis consists of five chapters. The first chapter is devated to the introduction, which contains information on the studies as well as the general purpose of the thesis. In the second chapter, the degenerate Gamma function and the degenerate Laplace transform are explained. In the third chapter, the ARA integral transform is explained and applications related to this transform are given. In the fourth chapter, the degenerate form of the ARA integral transform is defined and various applications are given. This chapter is the original part of the thesis. The fifth chapter consists of discassion and conclusion

An Integration of HF-AHP and ARAS Techniques in Supplier Selection: A Case Study in Waste Water Treatment Facility

Issues regarding the supplier evaluation and selection have been proven troubsome in today’s floruishing business world. However, decision making processes could be facilitated by such methods and techniques as HF-AHP and ARAS. This study aims to find the best supplier alternative  among  the five various machines offered by five suppliers according to four evaluation criterias by integrating HF-AHP with ARAS method. Keywords: Production Management, HF-AHP Method, ARAS Method, Supplier Selection JEL Classifications: M10, M1