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Öğe Documentation of historical caravansaries by digital close range photogrammetry(ELSEVIER, 2008) Yilmaz, H. M.; Yakar, M.; Yildiz, F.Heritage and culture are two important components in life of societies. Monuments and monumental groups are constructions of great value because of they represent the history and memory of the communities where they are placed. Heritage is our legacy from the past, what we live with today, and what we pass on to future generations. Conservation of cultural heritage is a major issue for modem societies, both from economical and cultural viewpoints. Caravansaries are one of the cultural heritages. Caravansary means home or shelter for caravans ("caravan" meaning a group or convoy of soldiers, traders or pilgrims engaged in long distance travel). Caravansaries supported the flow of commerce, information and people across a network of trade routes of Asia, North Africa and South-Eastern Europe. There are several documentation techniques available in order to document cultural heritage. These techniques are indispensable tools for the conservation of heritage monuments. These methods and equipment commonly are used for the documentation and surveying of buildings. Digital close range photogrammetry is one of the most important methods in documenting of cultural heritage. In this study, historical Zazadin Caravansary (Khan) on Silk Road was evaluated and documented by digital close range photogrammetry. It has shown that this method is very efficient compared with traditional method in documenting cultural heritage. (C) 2007 Elsevier B.V. All rights reserved.Öğe THE EFFECT OF PIXEL SIZE ON THE ACCURACY OF ORTHOPHOTO PRODUCTION(COPERNICUS GESELLSCHAFT MBH, 2016) Kulur, S.; Yildiz, F.; Selcuk, O.; Yildiz, M. A.In our country, orthophoto products are used by the public and private sectors for engineering services and infrastructure projects, Orthophotos are particularly preferred due to faster and are more economical production according to vector digital photogrammetric production. Today, digital orthophotos provide an expected accuracy for engineering and infrastructure projects. In this study, the accuracy of orthophotos using pixel sizes with different sampling intervals are tested for the expectations of engineering and infrastructure projects.Öğe Malignancy risk in systemic Lupus Erythematosus patients treated with cyclophosphamide(CLINICAL & EXPER RHEUMATOLOGY, 2015) Yilmaz, N.; Emmungil, H.; Gucenmez, S.; Ozen, G.; Yildiz, F.; Balkarli, A.; Kimyon, G.[Abstract not Available]Öğe MALIGNANCY RISK IS INCREASED IN PATIENTS WITH SYSTEMIC SCLEROSIS(BMJ PUBLISHING GROUP, 2013) Kasifoglu, T.; Bilge, N. S. Yasar; Yildiz, F.; Ozen, G.; Pehlivan, Y.; Yilmaz, N.; Tarhan, F.[Abstract not Available]Öğe THE METEOROLOGICAL USAGE OF WATER VAPOR DATA OBTAINED FROM GPS(INT SCIENTIFIC CONFERENCE SGEM, 2009) Yildiz, F.; Yilmaz, Seyit AliThe data obtained from Constant GBS (SOBS) networks which arc established generally for the aim of geodesic, geodynamic and navigation studies also contribute to the meteorological studies. In this study, hourly temperature and pressure values measured by present meteorological sensors in SGPS stations as well as water vapor values (PWV) that can be converted into rain by taking the advantage of GPS observations will be calculated for Middle Anatolian Region. The values of GPS_IPWV obtained as a result of calculation will be confirmed with the radiosonde data and will also be compared with MM5 weather forecast model results used in State Meteorological Service (DMI). This study, which covers Middle Anatolian Region, will be carried out by using the data belonging to two radiosonde stations of DMI that are present in Ankara and Isparta. In this study, the consistence between PWV values calculated from GPS values and PWV values obtained from MM5 model and radiosonde will be examined. It is evaluated with this preliminary study that the GPS meteorology studies which has been just present in Turkey will be more economical and meaningful from the point of both geodesy-geophysicist and meteorologists to use present station data of DMI instead of establishing a meteorology sensor in every SOPS station in order to use for GPS calculations.Öğe Radiotherapy in the adjuvant setting of cervical carcinoma: Treatment results and prognostic factors(ELSEVIER IRELAND LTD, 2006) Yildiz, F.; Atahan, I. L.; Ozyar, E.; Pehlivan, B.; Genc, M.; Kose, F.; Ayhan, A.[Abstract not Available]Öğe Radiotherapy in the adjuvant setting of cervical carcinoma: treatment, results, and prognostic factors(BLACKWELL PUBLISHING, 2007) Atahan, I. L.; Yildiz, F.; Ozyar, E.; Pehlivan, B.; Genc, M.; Kose, M. F.; Tulunay, G.To evaluate the efficacy of postoperative radiotherapy and to investigate prognostic factors for early-stage cervical cancer patients. From December 1993 to December 2001, 141 patients with stage I-II cervical cancer without para-aortic lymph node (LN) metastases and treated by surgery and postoperative radiotherapy (RT) were included in this study. Indications for postoperative external RT were based on pathologic findings, including LN metastasis, positive surgical margins, parametrial involvement, pT2 tumor, and presence of any two minor risk factors like lymphvascular space involvement, deep stromal invasion, and tumor diameter between 2-4 cm. Sixty-six (47%) patients received RT alone, whereas 59 (42%) were treated with RT and concomitant chemotherapy (CT), and 16 received neoadjuvant CT. Patients with positive vaginal margins also received 27.5 Gy high-dose rate vaginal cuff brachytherapy in five fractions. Median follow-up time was 55 months. The actuarial 5-year overall (OS), disease-free (DFS), locoregional recurrence-free (LRFS), and distant metastases-free (DMFS) survival rates are 70%, 68%, 77%, and 88%, respectively. Univariate and multivariate analyses revealed that level and number of metastatic LNs and concomitant CT were unique significant prognostic factors for OS, DFS, and LRFS. Endometrial involvement, on the other hand, was proven to be significant for DFS and DMFS. Patients with less than three LN metastases or having only obturator LN involvement showed similar prognosis with their counterparts having no LN metastases. On the other hand, patients with either common iliac LN or more than three LN metastases had significantly worse outcome. Our results indicate that level and number of metastatic LNs are the most important prognostic factors determining the survival rates, and patients with upper lymphatic involvement or more than three metastatic LNs seem to need more effective treatment approaches.Öğe Risk factors for malignancy in systemic sclerosis patients(SPRINGER LONDON LTD, 2016) Kasifoglu, T.; Bilge, S. Yasar; Yildiz, F.; Ozen, G.; Pehlivan, Y.; Yilmaz, N.; Tarhan, F.Systemic sclerosis (SSc) is an autoimmune connective tissue disease with multisystem involvement. An increased incidence of cancer in SSc patients compared with the general population has been reported in several reports. Our aims in this study were to determine the most common malignancies and to investigate the possible risk factors for the development of malignancy in patients with SSc. Three hundred forty SSc patients from 13 centers were included to the study. Data of the patients were obtained by evaluating their medical records retrospectively. A total of 340 patients with SSc were evaluated. Twenty-five of the patients had 19 different types of malignancy. Bladder cancer was the most common type of cancer with four patients and was followed by breast cancer with three patients, and cervix cancer and ovarian cancer with two patients each. Other types of cancers such as squamous cell skin cancer, adenocancer with an unknown origin, multiple myeloma, chronic myeloid leukemia, papillary thyroid cancer, larynx cancer, non-small cell lung cancer, follicular type non-Hodgkin lymphoma (NHL), endometrium cancer, colon cancer, uterus cancer, neuroendocrine tumor, glioblastoma multiforme, and soft tissue sarcoma were diagnosed in one patient each. The only cancer type that showed an association with cyclophosphamide dose was bladder carcinoma. Other malignancies did not show a correlation with age, sex, smoking, type and duration of the disease, autoantibodies, organ involvement, and dose and duration of cyclophosphamide therapy. Cancer may develop in any organ in patients with SSc. Continuous screening of the patients during a follow-up period is necessary for the early detection of the tumor development.Öğe The Utility of Dissected Lymph Node Number and Lymph Node Metastasis Ratio In Stage IIIC Endometrium Adenocarcinoma: A Multicentric Analysis(ELSEVIER SCIENCE INC, 2018) Yildirim, B. Akkus; Onal, C.; Sari, S. Yuce; Yavas, G.; Gultekin, M.; Guler, O. C.; Yildiz, F.[Abstract not Available]Öğe Vaginal high dose rate brachytherapy alone in patients with intermediate- to high-risk stage I endometrial carcinoma after radical surgery(LIPPINCOTT WILLIAMS & WILKINS, 2008) Atahan, I. L.; Ozyar, E.; Yildiz, F.; Ozyigit, G.; Genc, M.; Ulger, S.; Usubutun, A.The objective of this study was to analyze the efficacy and morbidity of vaginal cuff brachytherapy alone in intermediate- to high-risk stage I endometrial cancer patients after complete surgical staging. Between October 1994 and November 2005, 128 patients with intermediate- to high-risk stage I endometrial adenocarcinoma were treated with high dose rate (HDR) brachytherapy alone after complete surgical staging. The intermediate- to high-risk group was defined as any stage I with grade 3 histology or stage IB grade 2 or any stage IC disease. The comprehensive surgery was in the form of total abdominal hysterectomy, bilateral salpingo-oophorectomy in addition to infracolic omentectomy, and routine pelvic and para-aortic lymphadenectomy. The median number of the lymph nodes dissected was 33. The median age at the time of diagnosis was 60 years. Forty patients were staged as IB (grade 2: 25 and grade 3: 15), and 88 patients were staged as IC (grade 1: 31, grade 2: 41, and grade 3: 16). A total dose of 27.5 Gy with HDR brachytherapy, prescribed at 0.5 cm, was delivered in five fractions in 5 consecutive days. Median follow-up was 48 months. Six (4.7%) patients developed either local recurrence (n = 2) or distant metastases (n = 4). Five-year overall survival and disease-free survival (DFS) rates are 96% and 93%, respectively. Only age was found to be significant prognostic factor for DFS. Patients younger than 60 years have significantly higher DFS (P = 0.006). None of the patients experienced grade 3/4 complications due to the vaginal HDR brachytherapy. Vaginal cuff brachytherapy alone is an adequate treatment modality in stage I endometrial adenocarcinoma patients with intermediate- to high-risk features after complete surgical staging with low complication rates.
