A rare cause of recurrent spontaneous pneumothorax: Birt-hogg-dube syndrome

Birt-Hogg-Dube (BHD) syndrome is an unusual disorder characterized by the triad of cutaneous lesions, renal tumors and lung cysts. In cases with BHD syndrome, the frequency of recurrent pneumothorax is increased due to presence of multiple lung cysts. It is important to evaluate the BHD syndrome in differential diagnosis of recurrent pneumothorax especially with multiple lung cysts predominating in the lung base. In these patients, the presence of accompanying kidney and other tumors should be investigated. Herein, we report a case of BHD syndrome presenting with recurrent pneumothorax. © 2018 by Turkish Thoracic Society

Using a data mining approach for the prediction of user movements in mobile environments

Cataloged from PDF version of article.Mobility prediction is one of the most essential issues that need to be explored for mobility management in mobile computing systems. In this thesis, we propose a new algorithm for predicting the next inter-cell movement of a mobile user in a Personal Communication Systems network. In the first phase of our three-phase algorithm, user mobility patterns are mined from the history of mobile user trajectories. In the second phase, mobility rules are extracted from these patterns, and in the last phase, mobility predictions are accomplished by using these rules. The performance of the proposed algorithm is evaluated through simulation as compared to two other prediction methods. The performance results obtained in terms of Precision and Recall indicate that our method can make more accurate predictions than the other methods.Yavaş, GökhanM.S

Vitrification of Common Carp (Cyprinus Carpio) Spermatozoa, Post-Thaw Sperm Quality, and Fertility

The aim of this investigation was to test a new technology, vitrification, or ultra-rapid freezing of the spermatozoa of common carp, and to study the ability of glucose, BSA, and other cryoprotectants to protect these cells from cryo-injuries. Spermatozoa were isolated and vitrified using 10 different cryoprotectant solutions: (1) Glucose based medium (GBM) + 1% bovine serum albumin (BSA); (2) GBM + 1% BSA + 10% DMSO; (3) GBM + 1% BSA + 20% DMSO; (4) GBM + 1% BSA + 30% DMSO; (5) GBM + 1% BSA + 10% DMA; (6) GBM + 1% BSA + 20% DMA; (7) GBM + 1% BSA + 30% DMA; (8) GBM + 1% BSA + 10% methanol; (9) GBM + 1% BSA + 20% methanol; (10) GBM + 1% BSA + 30% methanol. Fertilization rates for vitrification experiments were low and the use of low concentrations of cryoprotectants yielded lower fertilization rates than the vitrification solutions containing high cryoprotectant concentrations. In conclusion, this study reported successful vitrification of common carp spermatozoa by direct transfer into liquid nitrogen

Genotoxic effects of boric acid and borax in zebrafish, Danio rerio using alkaline comet assay

The present study is conducted to determine the potential mechanisms of Boron compounds, boric acid (BA) and borax (BX), on genotoxicity of zebrafish Danio rerio for 24, 48, 72 and 96-hours acute exposure (level:1, 4, 16, 64 mg/l BA and BX) in semi-static bioassay experiment. For that purpose, peripheral erythrocytes were drawn from caudal vein and Comet assay was applied to assess genotoxicity. Acute (96 hours) exposure and high concentrations of boric acid and borax increases % tail DNA and Olive tail moment. Genotoxicity was found for BA as concentration-dependent and BX as concentration and time dependent manner. In general, significant effects (P < 0,05) on both concentrations and exposure times were observed in experimental groups. DNA damage was highest at 96 h and 24 h for all BX and BA concentrations, respectively in peripheral blood of D. rerio. For the first time, our study demonstrates the effect of waterborne BA and BX exposure on genotoxicity at the molecular level, which may contribute to understanding the mechanism of boric acid and borax-induced genotoxicity in fish

The TAC IR FEL oscillator facility project

Bilen, Bükem (Dogus Author) -- Full conference title: 31st International Free Electron Laser Conference (FEL 2009), 23-28 Aug 2009. Liverpool, United Kingdom.The TAC (Turkish Accelerator Center) IR FEL Oscillator facility, which has been supported by Turkish State Planning Organization (SPO) since 2006, will be based on a 15-40 MeV electron linac accompanying two different undulators with 2.5 cm and 9 cm periods in order to obtain IR FEL ranging between 2-250 microns. The electron linac will consist of two sequenced modules, each housing two 9-cell superconducting TESLA cavities for cw operation. It is planned that the TAC IR FEL facility will be completed in 2012 at Gölbasi campus of Ankara University. This facility will give an opportunity to the scientists and industry to use FEL in research and development in Turkey and our region. In this study, the results of optimization studies and present plans about construction process of the facility are presented

Final structure & design parameters of TARLA RF system

Doğan, Mehmet Sinan (Dogus Author) -- Conference full title: 5th International Particle Accelerator Conference, IPAC 2014; International Congress Center DresdenDresden; Germany; 15 June 2014 through 20 June 2014Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) is an oscillator mode IR-FEL facility which is under construction since 2011. ELBE licensed superconducting modules housing TESLA RF cavities have been manufacturing for one year and the first module will be delivered in 2015. He Cryogenic System has also started to be manufacturing at similar time with the accelerator structures. It will be delivered in 2014. High Power RF amplifiers are started to tender procedures and delivery time is planning as 2015. The installation of high power transmission lines have to be completed at the same time with the delivery date of HPRF amplifiers to test the cavities and amplifiers. In this study, the final structural design of high power RF transmission lines and design parameters of RF amplifiers for TARLA is discussed

Collective Excitations of (154)Sm nucleus at FEL{gamma}+LHC Collider

The production of collective excitations of the (154)Sm at FEL{gamma}+LHC collider is investigated. We show that this machine will be a powerful tool for investigation of high energy level excitations.Comment: 6 pages, 1 figure, 4 table

Fabrication and characterization of MgB2 powders and Cu-Clad MgB2 wires

Thesis (Master)--Izmir Institute of Technology, Physics, Izmir, 2005Includes bibliographical references (leaves: 56-61)Text in English; Abstract: Turkish and Englishxi, 61 leavesIn 2001, a new superconducting material, MgB2 (39K), which raised new hopes for electrical power applications due to its superior superconducting properties was discovered.In the first part of this study, elementary B is obtained by reacting B2O3, and Mg in Argon atmosphere at 800°C. EDX results revealed that the powder obtained was Boron in 93% purity with Mg as a major impurity. MgB2 is produced from acquired B and Mg in Ar atmosphere at 900°C by a conventional solid-state reaction. MgB2 powders were pressed to a pellet at 500°C at 1 GPa. Microstructural properties of MgB2 were determined by XRD, EDX, and SEM techniques. Electrical properties of fabricated MgB2 were analyzed by resistivity measurements with closed-cycle cryopump system between 20 and 300K. It is found that the Tc onset value of the pellet is around 32K. In the second part, different weight ratios of C is added to commercial MgB2 and pressed at 500°C at 1 GPa. R-T measurements revealed that transition temperature increases with an increase in the C addition concentration. In the third part, MgB2/Mg composite wires were prepared by packing blend of MgB2 and Mg powders inside Cu tubes using PIT method. The microstructure studies MgB2 and Mg powders inside Cu tubes using PIT method. The microstructure studies using XRD, EDX and SEM techniques showed that MgCu2 layer forms at the interface between Cu sheath and core because of Mg diffusion from superconducting core, and excess Mg prevents further reaction of Cu with MgB2. R-T measurements were performed to investigate the influence of excess Mg on Tc. The effect of annealing showed that excess Mg gives better results at annealing temperature of 400°C for 2 hours

The determination of drought resistance characters in Aegean region's wheat cultivars

Ege bölgesi koşullarında özellikle tane dolumu döneminde meydana gelen kuraklıklar verimde büyük ölçüde düşüşlere neden olmaktadır. Bu amaçla, Golia 99, Basribey 95, Cumhuriyet 75, Sagittario, Pamukova 97 ve Negev ekmeklik buğday çeşitlerinin kuraklığa toleransları değerlendirilmiştir. Çalışma, 2007-2008 ve 2008-2009 yıllarında sulu ve susuz koşullarda tarla denemeleri, saksı denemeleri ve çimlenme gözlemleri olmak üzere 3 aşamada yürütülmüştür. Tarla çalışmalarının ilk yılında, bitki boyu, metrekarede başak sayısı, başakta başakçık sayısı, yaprak kuruma oranı, başakta tane sayısı, tane verimi ve hasat indeksi yönünden; ikinci yılda ise; metrekarede başak sayısı, başaklanma gün süresi, başakta başakçık sayısı, tane dolum süresi, başakta tane sayısı, bin tane ağırlığı ve hasat indeksi yönünden uygulamalar x çeşit interaksiyonunun önemli olduğu saptanmıştır. İncelenen özellikler birlikte değerlendirildiğinde, susuz koşullara dayanıklılık yönünden tarla çalışmalarında bitki boyu, metrekarede başak sayısı, yaprakkuruma oranı ve bitki örtüsü sıcaklık değişiminin; saksı çalışmalarında PEG uygulamasında bayrak yaprağı duruş açısı, kardeşlenme öncesi NVDİ değeri ve sapa kalkma döneminde kök uzunluğunun; çimlenme çalışmalarında ise PEG uygulamasında koleoptil uzunluğunun dikkate alınması gerektiği sonucuna varılmıştır. Çeşitler karşılaştırıldığında ise Cumhuriyet 75, Negev ve Sagittario çeşitlerinin susuz koşullarda daha verimli olabileceği ve bu çeşitlerin kuraklığa dayanıklılığı amaçlayan ıslah çalışmalarında başarıyla kullanılabileceği söylenebilir.The drought which was occurred during especially grain filling in Aegean Region leads to significantly declined yield. For this purpose, bread wheat varieties which were Golia 99, Basribey 95, Cumhuriyet 75, Sagittario, Pamukova 97 and Negev were evaluated for drought tolerance. The study was conducted irrigated and rainfed conditions as field trials, pot trials and germination observations in three phases in 2007-2008 and 2008-2009. The applications x variety interactions were determined as important for the properties except for the flag leaf area, heading date, grain filling duration and thousand seed weight in the first year of field study and the except for all examined characteristics by plant height and flag leaf area in the second year. The examined characters were evaluated, in terms of resistance to non-irrigated conditions the plant height, spike number per square meter, the rate of dry leaves and normalized difference vegetation index in field, flag leaf stance, the value of NDVI at tillering and root length at jointing in pots with PEG application, and coleoptile length in germination studies with PEG was concluded to be taken into consideration. When the varieties were compared Cumhuriyet 75, Negev and Sagittario may be more efficient in drought years and these varieties can be said to use succesfully the drought resistance breeding studies