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Search Results: 1 - 10 of 2957 matches for " Ba?aran Alparslan "
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Shadow economy and public debt sustainability in Turkey
Bur?in Yereli Ahmet,Se?ilmi? Erdem ?brahim,Baaran Alparslan
Economic Annals , 2007, DOI: 10.2298/eka0773085b
Abstract: The aim of this study is to examine the relationship between the shadow economy and public debt in Turkey. We elaborate on the questions regarding the negative effects of shadow economy on the sustainability of public debt observing the estimates about the size of shadow economy in Turkey. In the light of some scholars’ estimates, we re-evaluate the macroeconomic situation of Turkey. At the core of the study, we discuss how the government borrowing policies would differ if the shadow economy was included into the legal system. In order to examine the effects of shadow economy on sustainability, we use various sustainability indicators. There is a significant difference observed between the calculations which take into account the volume of shadow economy as a share of economic system and those that exclude shadow economy as an exogenous variable. .
An Evaluation of Inter-Fractional Set-Up Errors in Patients Treated with Distinct Immobilization Equipment for Varying Anatomical Regions  [PDF]
Sibel Karaca, Hamit Baaran, Timur Koca, Ferhat ?zbayrak
International Journal of Medical Physics,Clinical Engineering and Radiation Oncology (IJMPCERO) , 2016, DOI: 10.4236/ijmpcero.2016.52013
Abstract: This study aims to evaluate inter-fractional set-up errors in patients treated with distinct immobilization equipment (thermoplastic mask, knee-fix and feet-fix, wing board and vac-lok) for four anatomical regions including brain, head and neck (HN), thorax and pelvis. Data of randomly selected 140 patients who were treated for four anatomical regions were obtained using Hi-Art Helical Tomotherapy (HT) system. Pre-treatment planning was based on automatic registration readings of computed tomography (CT) and mega-voltage computed tomography (MVCT) on a daily basis. Distinct immobilization equipment was used for varying anatomical regions. Individual mean set-up error (M), systematic error (Σ), and random error (σ) values were calculated through daily translational and rotational deviation values. The size of translational, systematic and random error was 1.31 - 4.93 mm for brain, 2.28 - 4.88 mm for HN, 4.04 - 9.90 mm for thorax, and 6.34 - 14.68 mm for pelvis. Rotational values were as follows: 0.06° - 0.73° for brain, 0.42° - 0.6° for HN, 0.48° - 1.14° for thorax and 0.65° - 1.05° for pelvis. The highest translational, systematic and random error value was obtained from the pelvic regional. The highest standard and random error value in pitch and roll was produced in the rotational direction of the pelvis (0.05° and 0.71°), while the highest error value in yaw was (1.14°) produced from thorax. Inter-fractional set-up errors were most commonly produced in the pelvis, followed by thorax. Our study results suggest that the highest systematic and random errors are found for thorax and pelvis. Distinct immobilization equipment was important in these results. Safety margins around the clinical target volume (CTV) are changeable for different anatomical regions. A future work could be developed to new equipment for immobilization because of the reduced margins CTV.
Typical carcinoid tumor of the larynx in a woman: a case report
Fatma Kayhan, Efser Baaran
Journal of Medical Case Reports , 2010, DOI: 10.1186/1752-1947-4-321
Abstract: A 55-year-old Turkish woman presented with a two-year history of persistent hoarseness. Endoscopic laryngeal examination and computed tomography revealed a supraglottic mass. Direct laryngoscopy was performed and a biopsy taken. Results of the histopathologic examination and immunohistochemical analysis were consistent with typical carcinoid tumor of the larynx. A supraglottic laryngectomy was performed. There was no recurrence during a follow-up period of three years.Carcinoid tumors require an accurate diagnosis because of their varied clinical behavior and prognosis. A correct pathologic diagnosis is essential, differentiating the tumors from other neuroendocrine neoplasms and medullary cancer of the thyroid gland. Immunohistochemical analysis is supplementary to a standard histopathologic evaluation. Currently, conservative surgical resection without elective neck dissection is the recommended treatment for typical carcinoid tumor of the larynx. Additional cases and case series with long-term follow-up will be useful for understanding the nature of this tumor and should clarify the prognosis.Neuroendocrine tumors of the larynx are the second most common neoplasm of the larynx after squamous cell carcinomas. Four types of neuroendocrine tumor have been identified by the World Health Organization (WHO): typical carcinoid tumor, atypical carcinoid tumor, small-cell neuroendocrine carcinoma and paraganglioma [1-3]. Carcinoid tumors and small cell neuroendocrine tumors originate from epithelium, whereas paragangliomas originate from neural tissue. Typical carcinoid tumors are less common than other neuroendocrine tumors of the larynx, with approximately 20 cases reported in the English language literature to date [4]. We present an unusual case of typical carcinoid tumor of the larynx in a woman, and review the literature on neuroendocrine neoplasms of the larynx.A 55-year-old Turkish woman presented with a two-year history of hoarseness. She did not use tobacco or a
Doripenem: A New Carbapenem in Clinical Practice
Seniha Baaran,Volkan Korten
Klimik Journal , 2010,
Abstract: Doripenem is the newest addition to the carbapenems, the most active class of antibiotics against many resistant pathogens. This review focuses on the antimicrobial, pharmacological and clinical aspects of doripenem. Its spectrum of activity is similar to that of meropenem and imipenem. According to the Turkish data of comparative activity of carbapenem (COMPACT) study, doripenem inhibited 64% of Pseudomonas aeruginosa at MIC 2 μg/ml, whereas meropenem and imipenem inhibited 56.2%, and 48.2% of the isolates, respectively. Unlike imipenem or meropenem, doripenem is stable for 12 hours at room temperature and may be delivered safely as a 4-hour extended infusion. This practice of administration lengthens the duration of time that the concentration of doripenem remains above the MICs of less susceptible pathogens. Based on animal models, doripenem has less epileptogenic activity than imipenem. Doripenem has been approved for use in treatment of complicated intraabdominal infection, complicated urinary tract infection, hospital-acquired pneumonia, and ventilator-associated pneumonia that are caused by susceptible pathogens.
Echocardiography and other imaging modalities in pulmonary arterial hypertension
Beste ?zben,Yelda Baaran
Anadolu Kardiyoloji Dergisi , 2010,
Abstract: It is essential to diagnose pulmonary arterial hypertension in early stages of the disease. However, most patients have late diagnosis due to the lack of disease-specific symptoms and prominent findings. Although cardiac catheterization is the gold standard in the diagnosis of pulmonary arterial hypertension, noninvasive diagnostic modalities do also have major roles in the diagnosis, risk assessment and follow-up of the patients with pulmonary arterial hypertension. The focus of the present review is the clinical role of echocardiography and other imaging modalities in pulmonary arterial hypertension.
Solving Unit Commitment Problem Using Modified Subgradient Method Combined with Simulated Annealing Algorithm
ümmühan Ba aran Filik,Mehmet Kurban
Mathematical Problems in Engineering , 2010, DOI: 10.1155/2010/295645
Abstract: This paper presents the solving unit commitment (UC) problem using Modified Subgradient Method (MSG) method combined with Simulated Annealing (SA) algorithm. UC problem is one of the important power system engineering hard-solving problems. The Lagrangian relaxation (LR) based methods are commonly used to solve the UC problem. The main disadvantage of this group of methods is the difference between the dual and the primal solution which gives some significant problems on the quality of the feasible solution. In this paper, MSG method which does not require any convexity and differentiability assumptions is used for solving the UC problem. MSG method depending on the initial value reaches zero duality gap. SA algorithm is used in order to assign the appropriate initial value for MSG method. The major advantage of the proposed approach is that it guarantees the zero duality gap independently from the size of the problem. In order to show the advantages of this proposed approach, the four-unit Tuncbilek thermal plant and ten-unit thermal plant which is usually used in literature are chosen as test systems. Penalty function (PF) method is also used to compare with our proposed method in terms of total cost and UC schedule.
A Comparative Study of Three Different Mathematical Methods for Solving the Unit Commitment Problem
Mehmet Kurban,ümmühan Ba aran Filik
Mathematical Problems in Engineering , 2009, DOI: 10.1155/2009/368024
Abstract: The unit commitment (UC) problem which is an important subject in power system engineering is solved by using Lagragian relaxation (LR), penalty function (PF), and augmented Lagrangian penalty function (ALPF) methods due to their higher solution quality and faster computational time than metaheuristic approaches. This problem is considered to be a nonlinear programming-(NP-) hard problem because it is nonlinear, mixed-integer, and nonconvex. These three methods used for solving the problem are based on dual optimization techniques. ALPF method which combines the algorithmic aspects of both LR and PF methods is firstly used for solving the UC problem. These methods are compared to each other based on feasible schedule for each stage, feasible cost, dual cost, duality gap, duration time, and number of iterations. The numerical results show that the ALPF method gives the best duality gap, feasible and dual cost instead of worse duration time and the number of iterations. The four-unit Tuncbilek thermal plant which is located in Kutahya region in Turkey is chosen as a test system in this study. The programs used for all the analyses are coded and implemented using general algebraic modeling system (GAMS).
Breast Cancer Related Lymphedema and Conservative Therapies
Türkiye Fiziksel Tip ve Rehabilitasyon Dergisi , 2009,
Abstract: Lymphedema is characterized by generalized or regional accumulation of protein-rich interstitial fluid that occurs as a consequence of congenital or acquired disruption of lymphatic circulation. Cancer-related lymphedema is the most common cause of secondary upper and lower extremity lymphedema. Secondary arm lymphedema is a chronic and disabling condition which affects a significant number of women who undergo breast cancer treatment. The incidence of breast cancer-related lymphedema was reported to be between 2.4 to 56%. Extensive surgical nodal clearing and irradiation are the most important risk factors for the development of lymphedema. Besides preventive approaches of treatment related complications and lymphedema, various therapeutic interventions have been proposed to treat this disabling condition. In the absence of well-designed randomized studies, consensus has not been attained concerning the appropriate treatment of lymphedema. Complex decongestive therapy, manual lymphatic drainage, self-adminitered lymphatic drainage, pneumatic pumps, laser therapy, oral pharmaceuticals, compression bandaging and garments, limb exercises and elevation are among the common conservative therapies used for managing lymphedema. This review overviews the risk factors, assessment methods, preventive approaches and treatment regimens that have been used for the management of lymphedema.
Transient Osteoporosis of the Hip
Rengin Güzel,Sibel Baaran
Türkiye Fiziksel Tip ve Rehabilitasyon Dergisi , 2009,
Abstract: Transient osteoporosis of the hip is often seen in middle-aged men and in women during the third trimester of pregnancy and is characterized by acute, spontaneous hip pain. In suspected cases magnetic resonance imaging shows bone marrow edema within 48 hours from the onset of pain. Transient osteoporosis is a diagnosis of exclusion and differential diagnosis with other diseases presented with hip pain and bone marrow edema should be considered. Although it is a self limiting condition it must be kept in mind that it may migrate and involve other joints in the lower extremities like knee, ankle and contralateral hip. The cornerstone of treatment is joint protection and limited weight bearing and antiresorptive medication may be of benefit. This review summarizes conditions defined with the terms of transient osteoporosis of the hip, migratory osteoporosis, pregnancy induced osteoporosis and transient bone marrow edema syndrome. Turk J Phys Med Rehab 2009; 55 Suppl 1: 41-5.
Hypomania in a Schizophrenic Patient Treated with Modafinil for Clozapine-Induced Sedation
Suzan ?ZER,Baaran DEM?R
N?ropsikiyatri Ar?ivi , 2010,
Abstract: Modafinil is used in the treatment of excessive daytime sleepiness associated with several conditions. Modafinil has also been suggested to improve antipsychotic-associated sedation in patients with schizophrenia. Although a small risk of psychosis exacerbation has been reported due to modafinil adjunct treatment, modafinil-induced mania or hypomania has not been described in schizophrenia up to now. Herein, we present a 31-year-old patient diagnosed as having schizophrenia according to DSM-IV-TR, who developed a hypomanic episode with irritability, motor activation and uninterruptible speech soon after adding modafinil to clozapine. In this context, the risks and benefits of adjunct therapy with modafinil in treatment- resistant schizophrenic patients who have been prescribed clozapine will be discussed. (Archives of Neuropsychiatry 2010; 47: 171-3)
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