Agile development approach for the observatory control software of the DAG 4m telescope

Observatory Control Software for the upcoming 4m infrared telescope of DAG (Eastern Anatolian Observatory in Turkish) is in the beginning of its lifecycle. After the process of elicitation-validation of the initial requirements, we have been focused on preparation of a rapid conceptual design not only to see the big picture of the system but also to clarify the further development methodology. The existing preliminary designs for both software (including TCS and active optics control system) and hardware shall be presented here in brief to exploit the challenges the DAG software team has been facing with. The potential benefits of an agile approach for the development will be discussed depending on the published experience of the community and on the resources available to us

A Pipeline for the ROTSE-IIId Archival Data

We have constructed a new, fast, robust and reliable pipeline to detect variable stars from the ROTSE-IIId archival data. Turkish share of ROTSE-III archive contains approximately one million objects from a large field of view (1.85\dgr) and it considerably covers a large portion of northern sky (\delta>-25\dgr). The unfiltered ROTSE-III magnitude of the objects ranges from 7.7 to 16.9. The main stages of the new pipeline are as follows: Source extraction, astrometry of the objects, light curve generation and inhomogeneous ensemble photometry. A high performance computing (HPC) algorithm has also been implemented into the pipeline where we had a good performance even on a personal computer. Running the algorithms of the pipeline on a cluster decreases analysis time significantly from weeks to hours. The pipeline is especially tested against long period variable stars with periods of a few hundred days (e.g Mira and SR) and variables having periods starting from a few days to a few hundred days were detected.Comment: 8 pages, 5 figures 2 tables; last revision before publishe

Biliyer kistadenom ve kistadenokarsinom: 11 olgu ve literatürün gözden geçirilmesi

Biliary cystadenoma and cystadenocarcinomas are very rare neoplasms of the liver. The 15-year experience of the University of Ege Faculty of Medicine was retrospectively evaluated for this tumor type, which has particularities with respect to diagnosis and therapy. The clinical, histologic and surgical therapeutic features were retrospectively evaluated for 11 cases (9 female, 2 male) operated between 1989 and 2004; The mean age of the patients was 52 (range, 33-70). In six of 11 cases (56%) the initial diagnosis was hydatid cyst and three patients had undergone ex;shy;ternal drainage. All cases were totally excised. The mean tumor diame;shy;ter was 8.3 cm. Differential diagnosis of this tumor group from the other cystic lesions of the liver is difficult in the initial diagnosis stage. They constitute an important disease process as they can be misinterpreted as hydatid cysts, which is an important health problem in our country, and because they have a high rate of recurrence unless they are totally resected.Biliyer kistadenomlar ve kistadenokarsinomlar karaciğerin nadir kistik tümörlerindendir. Gerek tanı gerekse de tedavi sürecinde özellik gerek­tiren bu tümör tipi için 15 yıllık Ege Üniversitesi Tıp Fakültesi Genel Cerrahi Anabilimdalı'nın deneyimi değerlendirildi. 1989-2004 tarihleri arasında tetkik ve tedavi edilen 11 olgu retrospektif olarak klinik ve his­tolojik parametreleri ve cerrahi tedavileri açısından tekrar gözden geçi­rildi. 11 olgunun 9'u kadın, 2'si erkek iken yaş ortalamaları 52 (33-70) olarak izlendi. Klinik ön tanı açısından 11 olgunun 6'sının (%54) kist hidatik olarak değerlendirildiği ve bu olgulardan 3'üne daha önceden dre­naj prosedürlerinin uygulanmış olduğu görüldü. Tüm olgulara total eksizyon uygulandı. Tümör çapı ortalaması 8.3 cm olarak saptandı. Tanı aşamasında preoperatif dönemde, bu tümörlerin diğer kistik karaciğer tü­mörlerinden ayırıcı tanısını yapmak oldukça güçtür. Ülkemiz için ciddi sağlık sorunu oluşturan kist hidatik lezyonları ile klinik olarak karışabilmeleri ve tam rezeksiyon yapılmadığı takdirde nüks oranlarının yüksek olması nedeniyle özellikli bir hastalık grubunu oluşturmaktadırlar

A rare clinical entity misdiagnosed as a tumor: Peliosis hepatic Yanlışlıkla tümör tanısı konmuş nadir bir klinik durum: Peliosis hepatic

Peliosis hepatis (PH) is a rare condition characterized by the presence of cystic, blood filled cavities within the hepatic parenchyma. Regardless of the reason, surgery should be performed under meticulous control of hemorrhage, if it is thought to be unavoidable. In this case report, ominous results of clinically misdiagnosed PH have been presented. PH should be kept on mind in all patients with hepatic mass, especially presented by sudden onset distention of the abdomen. Every effort should be done for the differential diagnosis with other cystic conditions like hydatid cyst in endemic areas

Pankreatik adenokarsinom ve pankreatik intraepitelyal neoplazilerde immunohistokimyasal olarak p53 ve Ki 67 ekspresyonunun değerlendirilmesi

Pancreatic ductal adenocarcinoma (PDA) is thought to arise from noninvasive dysplastic intraductal lesions, named pancreatic intraepithelial neoplasias (PanIN). Morphologic and genetic observations have provided strong evidence that PanlNs can be the precursors of PDA. We evaluated 21 patients with diagnosis of PDA. The histologic sections, harboring both PanIN and PDA were identified. PanIN lesions were counted, graded and their localization was evaluated. We examined also the expression of Kİ67 and p53, immunohistochemically. Interlobular location of PanIN lesions (58.20%) were more intense than intralobular location (41.80%). PanIN 2 and 3 within interlobular ducts were significantly higher than intralobular ducts (p=0.0026 ve p=0.006,respectively). P53 and Kİ67 expression in PanIN were lower than PDA, statistically (p=0.0045 ve p=0.0002, respectively). P53 tumor suppressor gene and Kİ67, proliferation marker in PanlNs can provide additional support for the hypothesis that these lesions represent progression with the potential for invasionPankreatik duktal adenokarsinomlar (PDA), pankreatik intraepitelyal neoplaziler (PanIN) olarak isimlendirilen noninvaziv displastik intraduktal lezyonlardan köken almaktadır. Morfolojik ve genetik çalışmalar, PanIN'lerin PDA'ların prekürsörü olabileceğinin güçlü bir kanıtını oluşturmuştur. Çalışmada PDA tandı 21 hasta değerlendirildi. PanIN ve PDA içeren histolojik kesitler gözden geçirildi. PanIN lezyon-ları sayıldı, derecelendirildi ve lokalizasyonları değerlendirildi. İmmunohistokimyasal (İHK) olarak Kİ67 ve P53 eks-presyonu araştırıldı. Olgularda, PanIN lezyonlarının interlobuler lokalizasyonu (%58.20) intralobuler lokalizasyonuna göre (%41.80) daha belirgin olup, interlobuler duktuslardaki PanIN 2 ve 3 lezyonları intralobuler duktuslara göre daha fazla olduğu göz­lendi (p=0.0026 ve p=0.006). PanIN'lerde Kİ67 ve P53 ekspresyonu istatistiksel olarak daha düşük bulundu (p=0.0045 ve p=0.0002). Tümör supresör gen olan p53 protein ve proliferasyon belirleyicisi olan Kİ67, PanIN lezyonlarının progresyon göstere­rek invazyon potansiyeli kazanabileceği hipotezine ek bir yarar sağlayacaktır