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The First Photometric Study of W UMa Binary System V1833 Ori

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Research in Astronomy and Astrophysics 2022年第8期22卷 258-269页

作者： Mehmet Tanrıver ahmet bulut Astronomy and Space Science Science FacultyUniversity of ErciyesTR-38039KayseriTürkiye Erciyes University Astronomy and Space Science Observatory Application and Research CenterTR-38039KayseriTürkiye Department of Physics Faculty of Arts and SciencesÇanakkale Onsekiz Mart UniversityTerzioglu CampusTR-17020ÇanakkaleTürkiye Astrophysics Research Center and Observatory Çanakkale Onsekiz Mart UniversityTerzioglu CampusTR-17020ÇanakkaleTürkiye

The first photometric solution in the B,V,R_(c) and I_(c) filters of the short period V1833 Ori eclipsing binary is presented based on new ground-based CCD photometric *** analyzed the BVRI photometric light curves of the system,using PHOEBE 0.31 a,a binary star modeling program,with the Wilson-Devinney method based on Roche geometry to achieve the best accordance with the photometric observations to determine their absolute parameters from the light *** updated the ephemeris of V1833 Ori using two new light curve minima derived by our new observational data from those collected in the literature and analyzed the change of the system's orbital *** O-C analysis indicates that the variations of the orbital period of V1833 Ori with time are increasing at a rate of 3.03×10^(-7)days yr^(-1).The distance of V1833 Ori is 173.7±15.6 *** the solutions,we find that V1833 Ori is an A-subtype W UMa overcontact binary with q=0.701 mass ratio and f=1.14 fill-out *** HR diagram positions of the eclipsing binary system's components are *** system's absolute dimensions were compared to those of similar binaries in the log T_(eff)-log L,logM-logL,1 ogM-logR and logM-log J_(0)diagrams.

关键词： (stars:)binaries:eclipsing stars:fundamental parameters stars:individual(V1833 Ori)

The First Multiband Photometric Light Curve Solutions of the V Gru Binary System from the Southern Hemisphere

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Research in Astronomy and Astrophysics 2023年第5期23卷 44-51页

作者： Mehmet Tanriver Atila Poro ahmet bulut ahmet Keskin Mark G.Blackford Department of Astronomy and Space Science Faculty of ScienceUniversity of ErciyesTR-38039KayseriTürkiye Erciyes University Astronomy and Space Science Observatory Application and Research CenterTR-38039KayseriTürkiye Astronomy Department of the Raderon AI Lab. BC.BurnabyCanada Department of Physics Faculty of ScienceCanakkale Onsekiz Mart UniversityTerzioğlu KampüsüTR-17020CanakkaleTürkiye Astrophysics Research Center and Ulupmar Observatory Çanakkale Onsekiz Mart UniversityTR-17020ÇanakkaleTürkiye Variable Stars South(VSS) Congarinni ObservatoryCongarinniNSW2447Australia

The first multiband photometric solutions of the short-period V Gru eclipsing binary from the southern hemisphere are presented in this *** curves of the system were observed through BVI filters at the Congarinni Observatory in Australia for 15 *** addition to the new ground-based data,we also used the TESS observations in two *** analyzed the light curves of the system using the PHysics Of Eclipsing BinariEs(PHOEBE)2.4.7 version code to achieve the best accordance with the photometric *** solutions suggest that V Gru is a near-contact binary system with q=1.302(81)mass ratio,f_(1)=0.010(23),f_(2)=-0.0.009(21),and i=73.45(38).We considered the two hot spots on the hotter and cooler components for the light curve *** extracted the minima times from the light curves based on the Markov Chain Monte Carlo(MCMC)*** our new light curves,TESS,and additional literature minima,we computed the ephemeris of V *** system’s eclipse timing variation trend was determined using the MCMC *** system is a good and challenging case for future studies.

关键词： (stars)binaries eclipsing-techniques photometric-stars individual(V Gru)

The First Photometric Study of W UMa Binary System V1833 Ori

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Research in Astronomy and Astrophysics 2022年第8期22卷 260-271页

作者： Mehmet Tanr?ver ahmet bulut Astronomy and Space Science Science Faculty University of Erciyes Erciyes University Astronomy and Space Science Observatory Application and Research Center Department of Physics Faculty of Arts and Sciences ?anakkale Onsekiz Mart University Terzioglu Campus Astrophysics Research Center and Observatory ?anakkale Onsekiz Mart University Terzioglu Campus

The first photometric solution in the B,V,Rcand Icfilters of the short period V1833 Ori eclipsing binary is presented based on new ground-based CCD photometric *** analyzed the BVRI photometric light curves of the system,using PHOEBE 0.31 a,a binary star modeling program,with the Wilson-Devinney method based on Roche geometry to achieve the best accordance with the photometric observations to determine their absolute parameters from the light *** updated the ephemeris of V1833 Ori using two new light curve minima derived by our new observational data from those collected in the literature and analyzed the change of the system’s orbital *** O-C analysis indicates that the variations of the orbital period of V1833 Ori with time are increasing at a rate of 3.03 ×10-7days *** distance of V1833 Ori is 173.7 ± 15.6 *** the solutions,we find that V1833 Ori is an A-subtype W UMa overcontact binary with q=0.701 mass ratio and f=1.14 fill-out *** HR diagram positions of the eclipsing binary system’s components are *** system’s absolute dimensions were compared to those of similar binaries in the log Teff-log L,logM-logL,1 ogM-logR and logM-log J0diagrams.

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BSN:Photometric Light Curve Analysis of Two Contact Binary Systems LS Del and V997 Cyg

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Research in Astronomy and Astrophysics 2024年第4期24卷 192-213页

作者： Atila Poro Mehmet Tanriver Elham Sarvari Shayan Zavvarei Hossein Azarara Laurent Corp Sabrina Baudart Asma Ababafi Nazanin Kahali Poor Fariba Zare ahmet bulut ahmet Keskin Astronomy Department of the Raderon AI Lab. BurnabyBC.Canada Department of Astronomy and Space Science Faculty of ScienceErciyes UniversityKayseri TR-38039Turkiye Erciyes University Astronomy and Space Science Observatory Application and Research CenterKayseri TR-38039Turkiye Independent Astrophysics Researcher TehranIran Department of Physics Shahid Beheshti UniversityTehranIran Faculty of Physics Shahid Bahonar University of KermanP.O.Box 76175KermanIran Double Stars Committee SociétéAstronomique de FranceParisFrance Dez Astronomical Association Khouzestan ProvinceDezfulIran Department of Physics Amirkabir University of TechnologyTehranIran Department of Physics Faculty of SciencesCanakkale Onsekiz Mart UniversityTerzioglu KampusuTR-17020CanakkaleTurkiye Astrophysics Research Center and Observatory Canakkale Onsekiz Mart UniversityTerzioğlu KampusuTR-17020CanakkaleTürkiye

The light curve analyses and orbital period variations for two contact binary stars,LS Del and V997 Cyg,are presented in this work which was conducted in the frame of the Binary Systems of South and North project Ground-based photometric observations were performed at two observatories in *** used the Transiting Exoplanet Survey Satellite(TESS)data for extracting times of minima and light curve analysis of the targe *** O-C diagram for both systems displays a parabolic *** Del and V997 Cyg’s orbital periods are increasing at rates of dP/dt=7.20×10^(-08)days yr^(-1)and dP/dt=2.54×10^(-08)days yr^(-1),respectively Therefore,it can be concluded that mass is being transferred from the less massive star to the more massive component with a rate of dM/dt=-1.96×10^(-7)M_(⊙)yr^(-1)for the LS Del system,and dM/dt=-3.83×10^(-7)M_(⊙)yr-1for V997 *** parameters of a third possible object in the system are also *** PHysics Of Eclipsing BinariEs Python code was used to analyze the light *** light curve solutions needed a cold starspot due to the asymmetry in the LS Del system’s light curve *** mass ratio fill-out factor,and star temperature all indicate that both systems are contact binary types in this *** methods were applied to estimate the absolute parameters of the systems:one method relied on the parallax of Gaia DR3,and the other used a P-M *** positions of the systems are also depicted on the M-L,M-R q-L_(ratio),and logM_(tot)-logJ_(0)*** recommend that further observations and investigations be done on the existence of a fourth body in this system.

关键词： (stars:)binaries:eclipsing methods:observational stars:individual(LS Del and V997 Cyg)

What is the relationship between frailty and orthostatic hypotension in older adults?

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Journal of Geriatric Cardiology 2019年第3期16卷 272-279页

作者： Suleyman Emre Kocyigit Pinar Soysal Esra Ates bulut Ali Ekrem Aydin Ozge Dokuzlar ahmet Turan Isik Unit for Aging Brain and Dementia Department of Geriatric MedicineFaculty of MedicineDokuz Eylul UniversityIzmirTurkey Department of Geriatric Medicine Bezmialem Vakif UniversityFaculty of MedicineIstanbulTurkey

Background Frailty and orthostatic hypotension (OH),which is common in older adults,is associated with morbidity and *** relationship between them remains *** aim of the study is to determine whether there is a relationship between frailty and *** A total of 496 patients who were admitted to the geriatric clinic and underwent comprehensive geriatric assessment were retrospectively *** a cross-sectional and observational study,OH was measured by the Head-up Tilt Table test at 1,3,and 5 min (respectively,OH1,OH3,and OH5) and the frailty was measured by the Fried’s frailty *** The mean age of all patients was 75.4 ± *** prevalence of females was 69.8%.When the frail people were compared with the pre-frail and the robust ones,the frailty was associated with *** was no relationship between the groups in terms of OH1 when the pre-frail group was compared with the robust ***3 were higher in the frail group than in the pre-frail group (P 0.05).Slowness and weakness were associated with OH1 (P < 0.05),whereas the other components of the Fried’s test were *** Frailty may be a risk factor for *** 1^st min measurements of OH should be routinely evaluated in frail older adults to prevent OH-related poor outcomes.

关键词： Frail Orthostatic hypotension Pre-frail Robust

Lacidipine,thiamine pyrophosphate and their combination on the ocular ischemic syndrome induced by bilateral common carotid artery ligation

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International Journal of Ophthalmology(English edition) 2024年第5期17卷 815-821页

作者： Ibrahim Cicek ahmet Mehmet Somuncu Durdu Altuner Bahadir Suleyman Renad Mammadov Seval bulut Taha Abdulkadir Coban Tugba Bal Tastan Halis Suleyman Department of Ophthalmology Faculty of MedicineErzincan Binali Yildirim UniversityErzincan 24100Turkey Department of Pharmacology Faculty of MedicineErzincan Binali Yildirim UniversityErzincan 24100Turkey Department of Clinical Biochemistry Faculty of MedicineErzincan Binali Yildirim UniversityErzincan 24100Turkey Department of Histology and Embryology Faculty of MedicineErzincan Binali Yildirim University ErzincanErzincan 24100Turkey

AIM:To investigate the effect of lacidipine,thiamine pyrophosphate(TPP)and the combination of lacidipine and TPP against oxidative and inflammatory eye damage induced by bilateral common carotid artery ligation in ***:Male albino Wistar rats were categorized as those who underwent sham surgery(SG),right and left common carotid cross-clamping and unclamping procedure(CCU),lacidipine+CCU(LCCU),TPP+CCU(TCCU),and combination of lacidipine and TPP(LTC)+CCU(LTCCU).One hour before anesthesia,the LCCU(n=6)received lacidipine(4 mg/kg,orally)and the TCCU(n=6)received TPP(20 mg/kg,intraperitoneally).The SG(n=6)and CCU(n=6)received the same volume of distilled water from the same *** anesthesia(60 mg/kg ketamine,intraperitoneally),the necks of the rats were opened in the *** was created for 10min by placing clips on the right and left common carotid *** in the SG only underwent subcutaneous *** 10min,the clips were removed and reperfusion was achieved for six ***,the animals were euthanized(120 mg/kg ketamine,intraperitoneally)and the levels of oxidant,antioxidant and proinflammatory cytokines in the eye tissues were *** retinal tissue of the eye was also examined ***:Lacidipine,TPP,and LTC significantly prevent the increase in malondialdehyde,tumor necrosis factoralpha,interleukin-1β(IL-1β),and IL-6 levels,decrease in total glutathione levels,superoxide dismutase and catalase activities and histopathological retinal damage in eye tissue induced by bilateral common carotid artery ligation in *** impact of these drugs on protection is determined to be LTC>lacidipine>***:As a result of the study,it is concluded that LTC may be more effective than lacidipine and TPP alone in treating ocular ischemic syndrome.

关键词： ocular ischemic syndrome lacidipine thiamine pyrophosphate oxidative stress

Outcome of surgical treatment of intestinal perforation in typhoid fever

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World Journal of Gastroenterology 2010年第33期16卷 4164-4168页

作者： Aziz Sümer zgür Kemik ahmet Cumhur Dülger Aydemir Olmez Ismail Hasirci Erol Kisli Vedat Bayrak Gulay bulut etin Kotan Department of General Surgery Medical FacultyUniversity of YüzüncüY1l Department of Gastroenterology Medical FacultyUniversity of YüzüncüY1l Department of Pathology Medical FacultyUniversity of YüzüncüY1l

AIM:To represent our clinical experience in the treatment of intestinal perforation arising from typhoid ***:The records of 22 surgically-treated patients with typhoid intestinal perforation were evaluated ***:There were 18 males and 4 females,mean age 37 years(range,8-64 years).Presenting symptoms were fever,abdominal pain,diarrhea or *** cases were subjected to segmental resection and end-to-end anastomosis,while 3 cases received 2-layered primary repair following debridement,one case with multiple perforations received 2-layered primary repair and end ileostomy,one case received segmental resection and end-to-end anastomosis followed by an end ileostomy,and one case received segmental resection and end ileostomy with mucous fistula *** morbidity was seen in 5 cases and mortality was found in one ***:Intestinal perforation resulting from Salmonella typhi is an important health problem in Eastern and Southeastern *** management of this illness,early and appropriate surgical intervention is vital.

关键词： Intestinal perforation Typhoid fever Treat- ment