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Search Results: 1 - 10 of 730 matches for " Beyhan DEM?RHAN "
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Resident training in pathology: The current status of ten institutions and general evaluation
Beyhan DEMRHAN
Türk Patoloji Dergisi , 2008,
Abstract: Ankara Patoloji Derne i 2008 Ayl k Bilimsel Etkinlikleri er evesinde, 25 Ocak Cuma günü, Ankara, Ba kent üniversitesinde “Patoloji Uzmanl k E itimi: E itici ve Asistan g zü ile” konulu panel yap ld . Ankara'da patoloji uzmanl k e itimi veren 4 üniversite, 5 Sa l k Bakanl E itim ve Ara t rma Hastanesi ve Gülhane Askeri T p Akademisi asistan ve e itici temsilcileri bu panele kat ld lar. Panel kat l mc lar n n belirlenmesi amac yla; panelden yakla k 2 ay ncesinde Ankara'da patoloji uzmanl k e itimi veren üniversite ve Sa l k Bakanl E itim hastanelerinin tümünden asistan ve e itici temsilcileri istendi. ki efli i olan kurumlar n bir k sm ndan ayr ayr bir k sm ndan ise ortak temsilciler belirlendi. Kurumlar n belirledi i temsilciler “asistan grubu” ve “e itici grubu” olmak üzere iki grup olu turdu. Panel ncesinde yakla k 2 ayl k bir süre te; e itici ve asistan temsilcilerinden olu an gruplar ayr ayr toplanarak al malar n sürdürdüler.Patoloji uzmanl k e itiminin Ankara ap nda durum de erlendirmesi ama l anketler yapt lar. Sorunlar yakla k haftal k-iki haftal k toplant larla tart t lar. Panel i in her grup kendi i inden s zcüler se ti. S zcüler konu ma metinlerini grupla birlikte haz rlad lar. leriki sayfalarda bu konu ma metinleri ayr ayr verilmektedir.Panele haz rlan rken a a da belirlenen er evede sorunlar tart ld . Ayr ca gündeme yeni gelen konular da anketlerde veya tart ma metinlerinde yer ald .
Resident training in pathology: General overview
Beyhan DEMRHAN
Türk Patoloji Dergisi , 2008,
Abstract: The chaos in the law related to “regulations of medical specialty” has negative effect on the training of pathology residency programs in our country. There are enormous effort to close the gap by the medical specialists via their societies or federations. Training in pathology commission of Federation of Turkish Pathology Societies has finished their work related to “The schedule of training of pathology residency” and “logbook”. The panel deals with training in pathology residency are part of these efforts. Requirements of rotations to the other institutions were treated too. It is considered more appropriate that the federation regulates rotations for sub specializations. Systematic approach is requiring for education. Each pathology department should have an education team. It is recommended that a senior pathologist become the head of the team. This organization could solve the most of the problems. Satisfaction of residents and trainers will be increased by the schedule of training of pathology residency; logbook, written feedbacks and competency based resident training and assessment that organized by these education teams/units.
Morphological Evaluation of Parathyroid Adenomas and Immunohistochemical Analysis of PCNA and Ki-67 Proliferation Markers
Ebru DEM?RALAY,Gülüm ALTACA,Beyhan DEMRHAN
Türk Patoloji Dergisi , 2011,
Abstract: Objective: Parathyroid adenomas are the most common cause of primary hyperparathyroidism. Biological studies have shown that parathyroid adenomas are monoclonal proliferations. Up to date, five cell types have been identified in normal parathyroid tissues; chief cells, vacuolated chief cells, dark chief cells, oxyphil cells and transitional oxyphil cells. Most parathyroid adenomas are predominantly composed of chief cells. In this study, we aimed to indicate the relationship between the predominant cell type in parathyroid adenomas and proliferating cell nuclear antigen, Ki-67 antigen, and serum parathormone levels and the gland weight.Material and Method: 15 cases who had a diagnosis of parathyroid adenomas were included in the study. Histopathologically, the predominant cell type was determined in all the cases. Paraffin blocks were immunohistochemically stained with proliferating cell nuclear antigen and Ki-67.Results: The average parathormone level of the cases was 239.52 ± 36.61 pg/ml before surgery. Mean gland weight was 1.69 ± 0.49 g. Two of the cases showed atypical adenoma characteristics. The predominant cell type was vacuolated chief cell. Immunohistochemical investigation showed that the mean average Ki-67 index value was 4.26 ± 0.86%. The mean proliferating cell nuclear antigen index was 93.20± 45.72/103. There was a meaningful relationship between gland weights and serum parathormone levels. There was no meaningful relationship between predominant cell types and serum parathormone levels, proliferating cell nuclear antigen index, and Ki-67 index. The chief cell was identified as the predominant cell type.Conclusion: It can be concluded that parathyroid adenomas come into existence as a result of neoplastic proliferation of chief cells, especially vacuolated chief cells.
Pseudomelanoma developing after shave excision of melanocytic nevus: Case report and review of literature
Beyhan DEMRHAN,A. Tülin GüLE?,Banu B?LEZ?K??,Bülent CELASUN
Türk Patoloji Dergisi , 2007,
Abstract: Pseudomelanoma is a pigmented lesion of the skin which follows incomplete excision of a benign nevus and imitates a superficial spreading malignant melanoma both histopathologically and dermatoscopically. Recognition of the features of pseudomelanoma can help preventing unnecessary treatment. Here we report a case of pseudomelanoma occuring two months after a shave excision on the abdomen of a 22 year-old-woman. The original material had not been examined histopathologically. The recurrent lesion had a high score for malignancy under dermatoscopical examination. Some of the histopathological findings resembled in part to malignant melanoma. The patient's history of previous incomplete excision, the presence of remnants of mature melanocytic nevus cell nests and the lack of epidermal invasion were among the helpful findings which helped us diagnose the lesion as pseudomelanoma. In this article, the differential diagnosis of pseudomelanoma from malignant melanoma has been discussed and the importance of recognition of entity is stressed.
Diagnostic utility of glandular arrangement in endometrial polyps
?zlem ?ZEN,Aydan KILI?ARSLAN,Zübeyde ARAT,Beyhan DEMRHAN
Türk Patoloji Dergisi , 2006,
Abstract: Endometrial polyps can be difficult to diagnose, especially when they are encountered in specimens obtained by biopsy or curettage. We evaluated 71 cases of grossly identifiable polyps from hysterectomy or polypectomy specimens for various histologic features and correlated the frequency of these features with variables such as menstrual state, histopathologic type, and shape of the polyps in order to find out diagnostic parameters in biopsy or curretage specimens. The most frequently observed histologic findings in both premenopausal and postmenopausal women were the presence of thick walled vessels and irregularly shaped glands (91.5% and 97.2%, respectively). In addition, we evaluated another histologic feature, the parallel arrangement of the long axes of endometrial glands to the surface epithelium in 33 of 71 (46.4%) endometrial polyps. It was more common in polyps excised from premenopausal (56.4%) than in postmenopausal women (34.3%) and was found in 7 of 8 (87.5%) functional polyps, while 40.6% of hyperplastic polyps showed this feature. The presence of thick walled vessels is the most frequently identified histologic feature in endometrial polyps. Parallel arrangement, when present, could be an additional clue in the diagnosis of endometrial polyp in routine curettage specimens.
SERMAYE YAPISINI ETK LEYEN F RMAYA ZGü FAKT RLER N ANAL Z : MKB H ZMET F RMALARI üZER NE B R UYGULAMA = ANALYSIS OF FIRM SPECIFIC FACTORS AFFECTING CAPITAL STRUCTURE: APPLICATION ON ISE SERVICE FIRMS
Dilek DEMRHAN
Ege Academic Review , 2009,
Abstract: It is aimed to determine the firm characteristics that affect the capital structure of the firms in ISE service sector. In this context information obtained from the financial tables of the firms is analysed by using panel data analysis with regression model. According to the findings of the study the most important firm characteristics that affect the capital structure of service firms are profitability, firm size, liquidity and tangibility of firm assets. The findings of the study are parallel with the pecking order theory and nondebt tax shields, growth opportunities, business risk, tax and cost of debt are found to be unimportant factor that do not affect capital structure of service firms.
What Is Lifelong Learning? An Evaluation on Definition and Scope
?smail GüLE?,Seda DEM?R,Buket DEMRHAN
Sakarya University Journal of Education , 2012,
Abstract: There have been important social, economic and cultural transformations in the world since twentieth century. These transformations make people have education during their lives as people require to adapt themselves to the rapid changes and the society they belong to. Living in a harmonious way with the society and following the developments in the profession can be only possible on condition of individuals’ renovating themselves. This renovation is solely possible by lifelong learning. “Lifelong Learning” is one of the leading educational issue discussed and studied on in the world. Because lifelong learning is a term that can occur wherever people live and eliminates the barriers about the time, people’ age and educational level. In this study, literature about concept and terms of lifelong learning carried out so far is scanned and placed . It is aimed to evaluate and determine the concept of lifelong learning via these available terms.
Analysis of Changes in Market Shares of Commercial Banks Operating in Turkey Using Computational Intelligence Algorithms
M. Fatih Amasyali,Ayse Demrhan,Mert Bal
Advances in Artificial Intelligence , 2014, DOI: 10.1155/2014/649860
Abstract: This paper aims to model the change in market share of 30 domestic and foreign banks, which have been operating between the years 1990 and 2009 in Turkey by taking into consideration 20 financial ratios of those banks. Due to the fragile structure of the banking sector in Turkey, this study plays an important role for determining the changes in market share of banks and taking the necessary measures promptly. For this reason, computational intelligence methods have been used in the study. According to the research results, it is seen that it was not able to properly anticipate the data for the banking sector in the periods of financial crises (2000-2001 and 2008-2009). However, it is seen that, Simple Linear Regression is distinguished as a good algorithm among the computational intelligence algorithms for all periods between the years 1990 and 2009. 1. Introduction As a natural result of the financial liberalization in the economy and the banking industry in Turkey after 1980s, the competition in the banking industry increased significantly due to the reasons such as many new domestic and foreign players in the banking industry, release of the fund transfers especially from international markets, enabling the banks to make transactions in foreign currencies, advances in the technology, and introducing new services by the banks in the industry. Therefore, a bank, operating in the banking industry, can differentiate itself from the other banks only if it can develop new strategies. In recent years, because of economic and financial crisis, some of the public and private banks were bankrupted and some of them are merged and therefore they were forced to change how they operate. In this instance, a serious competition occurred among the surviving banks to take the market shares of the banks that have left the industry. The banks, which have evaluated the present circumstances, used cutting edge technology, and improved the scope of their products and services, were able to advance forward significantly. Thus, these advances create a necessary environment for such banks to improve their market shares. Therefore, evaluating their position in the market and developing new strategies in accordance with their positions became much more important. The presence of a tough competition between the banks besides the fragile structure of the banking sector in Turkey makes it important to determine the change in the market shares of banks and to take the necessary measures. For this reason, goal-oriented estimations that would be made by using computational
Functional Disability Level in Patients with Stroke in Early Stage: The Relationship with Functional Gain
Alt?nay G?KSEL KARATEPE,Rezzan GüNAYDIN,Aylin DEMRHAN,Taciser KAYA
Türkiye Fiziksel Tip ve Rehabilitasyon Dergisi , 2008,
Abstract: Objective: This study was designed to establish the determinants of functional disability level and to investigate the relationship between functional disability level at the baseline and functional gain in patients with stroke at early period.Materials and Methods: Eighty patients who had their first stroke were enrolled in the study. Age, sex, location and type of the lesion were documented for each patient. The disease severity was assessed by the Canadian Neurological Scale. Functional disability levels of patients were determined by Functional Independence Measure (FIM) at the baseline and after a four weeks home exercise program. Functional gain was calculated by substracting the baseline FIM scores from the control FIM scores. Patients were divided into three groups according to baseline functional independence measure scores as patients with scores of ≤36, scores of 37–72 and scores of ≥73. Results: Significant improvement was observed in FIM scores of patients at the control examination (83.89±33.98) compared to baseline (53.18±29.31) (p<0.000). The mean functional gains of cases were 30.7±25.2. It was observed that baseline FIM score was the best predictor of control FIM score. Baseline FIM score explained 48% of control FIM score [b=0.502, p=0.001, (95 % CI 0.223–0.781)]. Patients with scores of 37–72 according to baseline FIM scores had markedly higher functional gain scores (45.6±23.1) than patients with scores of ≤36 (24.8±25.5) or patients with score of ≥73 (16.7±11.5) (F=13.5, p=0.000).Conclusion: In this study, it was determined that baseline FIM scores were the best predictor of functional disability, and also patients with moderate level of disability according to baseline FIM scores had higher functional gain. Patients with moderate level of FIM scores at the baseline should be admitted intensive rehabilitation programs, because these patients will provide higher benefit from the rehabilitation and could have higher functional gain. Turk J Phys Med Rehab 2008;54:133-7.
Geothermal Modeling of Kizilcahamam-Çamlidere Area Using 3D Imaging Technique  [PDF]
Ayhan Keskinsezer, Günay Beyhan
Geomaterials (GM) , 2013, DOI: 10.4236/gm.2013.34016
Abstract:

Geothermal energy has long been used for various purposes. Geothermal energy was used for bath and health care since ancient times. With the increase in the population, it is being used today for industrial and energy production. This paper examines the geothermal structure of Northern Ankara-NAF (Northern Anatolian Fault Zone) regions to reveal its tectonic features, and the relationships of the region with earthquakes. The 3D geological features of the area are investigated using the resistivity data and tectonic and the quake values. The resistivity data obtained by MTA (Mineral Research and Exploration of Turkey) are reached by geothermal measurements in the area in 1999. In Kizilcahamam town of Ankara Province, geothermal exploration was performed using geoelectrical methods. During the study, electrode measurement scheme was planned according to the Schlumberger expansion. AB/2 spacing is between 1900 m. and 2000 m. Data obtained from geoelectrical methods were processed to delineate the subsurface structure. Also, lithological components were determined and the previously known fault structure was shown. Since the 3D works have been more feasible recently, the received results are transferred into the 3D imaging platform taking advantage of 2D electrical resistivity maps. The low resistivity values obtained in 3D imaging are gathered that the temperature values of the area are high. On the other hand, as the pull-apart between NAF and Kirikkale fault trending NE-SW of the region is in form of basin, the study area is observed to own opening tectonics. Thus, when the seismic activity is considered, it reveals important findings about the presence of geothermal fields in the local.

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