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Search Results: 1 - 10 of 2130 matches for " Ahmet Mete "
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Solving Water Problems of a Metropolis  [PDF]
Ahmet Mete Saatci
Journal of Water Resource and Protection (JWARP) , 2013, DOI: 10.4236/jwarp.2013.54A002

The metropolis of Istanbul has faced water supply challenges throughout history; however the situation escalated in the past decade with rapid population growth. Water demand of an ever-growing city could only be solved by transporting water from surrounding water basins as far as 190 km away from the city border. Moreover, imbalanced distribution of water resources and imbalanced water demand on the European and Asian side of the city was resolved by transporting water from Asian side to the European side, by laying water transmission pipes under the Bosphorus Strait and by constructing a tunnel passing 130 m under the Strait. Another difficulty that required challenging solutions was the protection of water reservoirs of the city, hence illegal settlements arose in the reservoir watershed zones due to fast urban growth and migration from rural areas. Discharge of wastewater from illegal settlements caused not only algae growth in water treatment plant (WTP) of one of the largest reservoirs of Istanbul, but also eventual death of algae was a major setback due to anaerobic conditions created in the reservoir. The problem was solved by tertiary treatment of the wastewater and by diverting the effluent through a tunnel away from the reservoir. The aim of this paper is to provide an insight into setbacks faced in a metropolis of 14 million and technical solutions provided against the pollution of reservoirs.

Effect of partial oxidation by ozonation on the photocatalytic degradation of humic acids
Aslihan Kerc,Miray Bekbolet,Ahmet Mete Saatci
International Journal of Photoenergy , 2003, DOI: 10.1155/s1110662x03000163
Abstract: In this study humic acids, which are known to be a heterogeneous group of organic macromolecules found in natural waters, were oxidized using ozonation and photocatalysis in a sequential system. Ozonation was employed for achieving partial oxidation of humic acids prior to photocatalytic oxidation. Degradation of humic acid was explained by using pseudo first order reaction rate model based on UV-vis measurements. An improvement was achieved in the photocatalytic degradation rates with respect to the degree of pre-oxidation by ozonation. Due to the surface oriented nature of photocatalysis, adsorption characteristics of partially oxidized humic acid samples on TiO2 photocatalyst were evaluated by the application of the Freundlich adsorption model. The photocatalytic degradation rates did not correlate well with the dark adsorption characteristics of the pre-ozonated as well as untreated humic acid samples.
Using Entropy Working Correlation Matrix in Generalized Estimating Equation for Stock Price Change Model
SerpilK?l?c,Ahmet Mete,?ilingirturk j
Journal of Asian Scientific Research , 2012,
Abstract: Longitudinal studies involving binary responses are widely applied in medical, health and economic science research, have focused increasingly on how various independent variables affect responses over time. These studies involve repeated observations on a subject and thus correlation within each subject is expected. Correct inferences can only be obtained by taking into account the correct specification of within-subject correlation structure between repeated observations. In recent years, non-normal longitudinal data is analyzed by Generalized Estimating Equations (GEE) method. Goodness-of-fit statistics have been suggested for selecting an appropriate working correlation structure in GEE with longitudinal binary data. The purpose of this article to provide an overview of the GEE approach for analyzing correlated binary data and to choose the structure of the correlation matrix between repeated observations for model comparison, using data from Istanbul Stock Exchange (ISE) to increase on the return.
Correlation between the findings of expiratory high resolution computed tomography, respiratory function tests and tracheal index in chronic obstructive pulmonary disease
Ozan Kurtulgan,Ahmet Mete,Meral Uyar
Dicle Medical Journal , 2012,
Abstract: Objectives: In this study we aimed to investigate the relationship between expiratory HRCT findings, tracheal index (TI) and pulmonary function tests in patients with chronic obstructive pulmonary disease (COPD).Materials and methods: Sixty patients diagnosed with COPD in our hospital, department of pulmonary medicine, and 65 subjects complaining of cough with normal pulmonary function tests as a control group were enrolled in the study. All subjects were evaluated with HRCT. HRCT and pulmonary function tests were performed in same day and FEV1, FVC, FEV1/FVC values were recorded. Pearson Chi-Square, Independent Samples T test, and Mann Whitney U test were used for statistical evaluation.Results: Subjects’ mean age was 55.44±10.22 years. Bronchiectasis, bronchial wall thickening, emphysema, centrilobular bronchiolar thickening and air trapping were significantly higher in COPD group than control group. In patient group, TI values were lower than control group (p < 0.001). Also there was moderate negative relationship between TI and age (p = 0.00, r = -0.48).Conclusions: Expiratory HRCT findings and TI values show various degrees of relationship with pulmonary function test results in patients with COPD. Despite normal pulmonary function tests, pathological changes can be detected in expiratory HRCT scans
Massive Secondary Postpartum Hemorrhage with Uterine Artery Pseudoaneurysm after Cesarean Section
Ahmet Ozgur Yeniel,Ahmet Mete Ergenoglu,Ali Akdemir,Elmin Eminov
Case Reports in Obstetrics and Gynecology , 2013, DOI: 10.1155/2013/285846
Fibrolipoma of the nasal septum; report of the first case
Murat Ozturk, Kadri Ila, Ahmet Kara, Mete Iseri
Journal of Otolaryngology - Head and Neck Surgery , 2013, DOI: 10.1186/1916-0216-42-11
Abstract: Case report.This report includes a patient who had a nasal septal fibrolipoma and an accompanying corpus callosum lipoma.To our knowledge, this is the first reported nasal septal fibrolipoma case in the literature. The diagnostic and surgical features of this case and the unity of septal fibrolipoma and intracranial lipomas are discussed.Lipomas are benign, slowly growing neoplasms composed of mature fat cells grouped in lobules by connective tissue septa. These tumors are very rare in the sinonasal tract [1]. Fibrolipomas are a very rare subtype of the lipomas, composing %1,6 of the facial lipomas [2]. In the literature; there are cases reported as fibrolipomas in the esophagus, pharynx, colon, trachea, larynx and oral cavity [3]. This article presents a patient with nasal septal fibrolipoma, and to the knowledge of the researchers, it is the first reported nasal septal case in the literature.An 18-year-old male patient presented with a two year history of nasal obstruction to the otorhinolaryngology department with no additional complaints. His medical family history had revealed nothing abnormal. An endoscopic examination revealed a soft, painless, well circumscribed 2.5x1.5 cm sized mass coated with normal mucosa in the left nasal cavity, localized from the anterior portion of the nasal septum to the posterior (Figure 1). The right nasal cavity was deemed narrowed due to the compression effect of the mass. The computed tomography (CT) showed a 25x12 mm sized low density mass in the septum (Figure 2A). Magnetic resonance imaging (MRI) presented a 22x12 mm lesion with high signal intensity in both T1 and T2 weighted images (Figure 2B). The image revealed a suppression pattern on the fat-suppressed MRI. The same investigation also revealed a 18 mm thick, 51 mm long lipoma at the falx cerebri that pushed the corpus callosum and anteroposteriorly reached the cingulate gyrus (Figure 2C). An incisional biopsy was performed on the mass under local anesthesia, and the sp
Serum Interleukin-6 Levels in the Differential Diagnosis of Sepsis and Transient Tachypnea of Newborn
Nurdan URA?,Ahmet KARADA?,Alparslan TONBUL,Emin METE
Trakya Universitesi Tip Fakultesi Dergisi , 2010,
Abstract: Objective: The aim of this study was to evaluate the role of serum interleukin-6 (IL-6) levels in the differentiation of neonatal bacterial sepsis and TTN. Material and Methods: The hospital records of 58 newborn infants with respiratory distress who were above 35 weeks of gestational age were investigated. Patients were divided into two groups. The infection group consisted of patients with proven sepsis and clinical sepsis and the other was the TTN group. Clinical findings and white blood cell count, serum C-reactive protein (CRP), IL-6 levels and the ratio of immature neutrophils to total neutrophils count (I/T) were recorded and compared between the two groups.Results: Serum CRP and IL-6 levels were found higher than the normal limits in both of the groups. However there was no significant difference between them. Duration of respiratory distress was longer and I/T ratio significantly higher in the infection group than the TTN group. The combination of IL-6 and I/T ratio yielded a sensitivity of 80%, a specificity of 48%, a positive predictive value of 44.7%, and a negative predictive value of 80%Conclusion: The I/T ratio and IL-6 may contribute to the early diagnosis of sepsis with respiratory symptoms in newborn infants but IL-6 alone cannot distinguish between TTN and sepsis.
Retrospective Evaluation Of MRI Findings Of Knee Joint In 255 Patients
Ahmet Mete,Mustafa ?zate?,Remzi ?evik,Ya?ar Bükte
Dicle Medical Journal , 2003,
Abstract: Retrospective evaluation of knee MRI obtained from 255 cases and to demonstrate most common knee joint pathologies in our region.In our study knee joints of 255 cases who admitted to different clinics of our hospital with various complains of knee between October 1996 and December 1998 were examined in wide spectrum with MRI. Via 1.0 Tesla MRI device and special knee coil in sagittal, coronal and axial plains MRI images were obtained. The number of male and female patients were 173 and 82 and their ages were ranged between 14 and 70, and the mean age was 34 13.The most common knee pathologies were intra-articular fluid (%58.04), medial (%46,66) and lateral (%12.55) meniscal injuries, anterior cruciate ligament injury (%17.25) and osteoarthritis (%14.9). The other important lesions were degeneration of medial and lateral meniscus, Baker’s cyst, bursitis, posterior cruciate ligament injury , medial and lateral collateral ligament injuries, synovial hypertrophy, chondromalasia of patella, and contusion.In our images of knee the most common lesions were injuries of meniscus and ligament. Because of being noninvasive technique for knee joint pathologies, capacity of multiplanar imaging, high contrast resolution and chance of detailed anatomic evaluation MR imaging was found to be most appropriate imaging technique for knee joint pathologies.
Bilateral Obstetric Palsy of Brachial Plexus
?zlem Alt?nda?,Sava? Gürsoy,Ahmet Mete
Türkiye Fiziksel Tip ve Rehabilitasyon Dergisi , 2009,
Abstract: Obstetric Brachial Plexus Palsy (OBPP) is one of the devastating complications of difficult or assisted deliveries. Brachial plexus palsy with upper root involvement most commonly affects the external rotators and abductors. Twenty percent of obstetrical brachial plexus palsies are bilateral and they represent a more severe condition. An eight-year-old girl patient with bilateral brachial plexus palsy was described and discussed in this report. Turk J Phys Med Rehab 2009;55:126-7.
Chronic constipation: Facilitator factor for development of varicocele
Guldem Kilciler,Ahmet Ali Sancaktutar,Ali Avc?,Mete Kilciler
World Journal of Gastroenterology , 2011, DOI: 10.3748/wjg.v17.i21.2641
Abstract: AIM: To evaluate the possible relationship between varicocele and chronic constipation. METHODS: Between April 2009 and May 2010, a total of 135 patients with varicocele or constipation and 120 healthy controls were evaluated. Patients were divided into two groups. In both groups detailed medical history was taken and all patients were examined physically by the same urologist and gastroenterologist. All of them were evaluated by color Doppler ultrasonography. All patients with constipation, except for the healthy controls of the second group, underwent a colonoscopy to identify the etiology of the constipation. In the first group, we determined the rate of chronic constipation in patients with varicocele and in the second group, the rate of varicocele in patients with chronic constipation. In both groups, the rate of the disease was compared with age-matched healthy controls. In the second group, the results of colonoscopies in the patients with chronic constipations were also evaluated. RESULTS: In the first group, mean age of the study and control groups were 22.9 ± 4.47 and 21.8 ± 7.21 years, respectively (P < 0.05). In the second group, mean age of the study and control groups were 52.8 ± 33.3 and 51.7 ± 54.3 years, respectively (P < 0.05). In the first group, chronic constipation was observed in 8 of the 69 patients with varicocele (11.6%) and 3 out of 60 in healthy controls (5%), respectively. In this regard, there was no statistical significance between varicocele patients and the healthy control (P = 0.37). In the second group, varicocele was observed in 16 of the 66 patients with chronic constipation (24.24%) and 12 out of 60 in healthy controls (20%) respectively. Similarly, there was no statistical significance between chronic constipation and healthy controls (P = 0.72). Internal/external hemorrhoids were detected in 4 of the 16 patients with chronic constipation and varicocele, in the second group. In the remaining 50 patients with chronic constipation 9 had internal/external hemorrhoids. In this regard, there was no statistical significance between chronic constipation and healthy controls (P = 0.80). CONCLUSION: Chronic constipation may not be a major predictive factor for the development of varicocele, but it may be a facilitator factor for varicocele.
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