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Öğe Estimated plasma volume as a determinant of heart failure hospitalization: TREAT-HF data(WILEY-BLACKWELL, 2016) Sari, I.; Kaya, H.; Acar, G.; Cavusoglu, Y.; Demir, M.; Gungor, H.; Oguz, D.; Bekar, L.; Sahin, A. A.; Yilmaz, M. B.…Öğe Gaps in management among HFREF outpatients with diabetes mellitus(WILEY-BLACKWELL, 2015) Kaya, H. Hakki; Yagmur, B.; Acar, B.; Demir, M.; Eraslan, S.; Karauzum, K.; Ege, M.; Acar, G.; Celik, A.; Yilmaz, M. B.…Öğe Heart failure awareness in improved in turkish HFREF patients(WILEY-BLACKWELL, 2015) Kaya, H. Hakki; Yagmur, B.; Acar, B.; Demir, M.; Eraslan, S.; Karauzum, K.; Oguz, D.; Acar, G.; Celik, A.; Ege, M.…Öğe Heart failure awareness is being increased in HF patients: TREAT-HF cohorts(OXFORD UNIV PRESS, 2015) Kaya, H.; Yagmur, B.; Acar, B.; Demir, M.; Karauzum, K.; Acar, G.; Celik, A.; Ege, M.; Sari, I.; Yilmaz, M. B.…Öğe Immunization status in chronic obstructive pulmonary disease: A multicenter study from Turkey(WOLTERS KLUWER MEDKNOW PUBLICATIONS, 2019) Ozlu, Tevfik; Bulbul, Yilmaz; Aydin, Derya; Tatar, Dursun; Kuyucu, Tulin; Erboy, Fatma; Koseoglu, Handan Inonu; Anar, Ceyda; Sunnetcioglu, Aysel; Gulhan, Pinar Yildiz; Sahin, Unal; Ekici, Aydanur; Duru, Serap; Ulasli, Sevinc Sarinc; Kurtipek, Ercan; Gunay, Sibel; Okutan, O.; Yildiz, B. P.; Cetinkaya, P. D.; Arslan, S.; Cakmak, G.; Cirak, A. K.; Sarioglu, N.; Kocak, N. D.; Akturk, U. A.; Demir, M.; Kilic, T.; Dalli, A.; Hezer, H.; Altintas, N.; Acat, M.; Dagli, C. E.; Kargi, A.; Yakar, F.; Kirkil, G.; Baccioglu, A.; Gedik, C.; Intepe, Y. S.; Karadeniz, G.; Onyilmaz, T.; Saylan, B.; Baslilar, S.; Sariman, N.; Ozkurt, S.; Arinc, S.; Kanbay, A.; Yazar, E. E.; Yildirim, Z.; Kadioglu, E. E.; Gul, S.; Sengul, A.; Berk, S.; Dikis, O. S.; Kurt, O. K.; Arslan, Y.; Erol, S.; Korkmaz, C.; Balaban, A.; Erbay, Toru U.; Sogukpinar, O.; Uzaslan, E. K.; Babaoglu, E.; Bahadir, A.; Baris, S. A.; Ugurlu, A. O.; Ilgazli, A. H.; Fidan, F.; Kararmaz, E.; Guzel, A.; Alzafer, S.; Cortuk, M.; Hocanli, I; Ortakoylu, M. G.; Erginel, M. S.; Yaman, N.; Erbaycu, A. E.; Demir, A.; Duman, D.; Tanriverdi, H.; Yavuz, M. Y.; Sertogullarindan, B.; Ozyurt, S.; Bulcun, E.; Yuce, G. D.; Sariaydin, M.; Ayten, O.; Bayraktaroglu, M.; Tekgul, S.; Erel, F.; Senyigit, A.; Kaya, S. B.; Ayik, S.; Yazici, O.; Akgedik, A.; Yasar, Z. A.; Hayat, E.; Kalpaklioglu, F.; Sever, F.; Sarac, P.; Ugurlu, E.; Kasapoglu, U. S.; Gunluoglu, G.; Demirci, N. Y.; Bora, M.; Talay, F.; Ozkara, B.; Yilmaz, M. U.; Yavsan, D. M.; Cetinoglu, E. D.; Balcan, M. B.; Ciftci, T.; Havan, A.; Gok, A.; Nizam, M.OBJECTIVE: The purpose of this study is to detect the prevalence and the factors associated with influenza and pneumococcal vaccination and outcomes of vaccination during 2013-2014 season in patients with chronic obstructive pulmonary disease (COPD) in Turkey. METHODS: This was a multicenter retrospective cohort study performed in 53 different centers in Turkey. RESULTS: During the study period, 4968 patients were included. COPD was staged as GOLD 1-2-3-4 in 9.0%, 42.8%, 35.0%, and 13.2% of the patients, respectively. Influenza vaccination rate in the previous year was 37.9%; and pneumococcus vaccination rate, at least once during in a life time, was 13.3%. Patients with older age, higher level of education, more severe COPD, and comorbidities, ex-smokers, and patients residing in urban areas had higher rates of influenza vaccination. Multivariate logistic regression analysis showed that advanced age, higher education levels, presence of comorbidities, higher COPD stages, and exacerbation rates were associated with both influenza and pneumococcal vaccination. The number of annual physician/outpatient visits and hospitalizations due to COPD exacerbation was 2.73 +/- 2.85 and 0.92 +/- 1.58 per year, respectively. Patients with older age, lower education levels, more severe COPD, comorbid diseases, and lower body mass index and patients who are male and are residing in rural areas and vaccinated for influenza had significantly higher rates of COPD exacerbation. CONCLUSIONS: The rates of influenza and pneumococcal vaccination in COPD patients were quite low, and the number of annual physician/outpatient visits and hospitalizations due to COPD exacerbation was high in Turkey. Advanced age, higher education levels, comorbidities, and higher COPD stages were associated with both influenza and pneumococcal vaccination.Öğe Presence of accompanying diabetes mellitus is associated with preserved right heart functions among HFREF outpatients(WILEY-BLACKWELL, 2015) Kaya, H. Hakki; Yagmur, B.; Acar, B.; Demir, M.; Eraslan, S.; Karauzum, K.; Oguz, D.; Acar, G.; Celik, A.; Yilmaz, M. B.…Öğe Second harmonic generation in Harmonic-Gaussian asymmetric double quantum well: effect of magnetic and intense laser fields(Iop Publishing Ltd, 2024) Tuzemen, A. Turker; Demir, M.; Dakhlaoui, H.; Mora-Ramos, M. E.; Ungan, F.We have theoretically analyzed the effects of externally applied fields (magnetic and intense laser) as well as various structural parameters such as well width, barrier width, barrier height, and structural asymmetry on the second harmonic generation (SHG) coefficients of GaAs/Al0.3Ga0.7As Harmonic-Gaussian asymmetric double quantum wells (QW). The time-independent Schr & ouml;dinger equation was solved using the diagonalization method and effective mass approximation to obtain the energy eigenvalues and eigenfunctions of the structure. An expression derived within the compact density matrix approach has been used to evaluate the second harmonic generation (SHG) coefficient. Our numerical results indicate that increasing the magnitude of the magnetic (intense laser) field causes the peak positions of SHG to shift towards higher energy regions/blue (lower energy regions/red). On the other hand, as the structural parameters A 1 and A 2 ( k and z 0 ) increase, the peak positions of the SHG coefficients exhibit a shift towards higher energy regions/blue (lower energy regions/red). We expect that the results of our study will contribute to the development of new optoelectronic devices based on the Harmonic-Gaussian asymmetric double quantum well structure.Öğe Third harmonic generation of a 12-6 GaAs/Ga1-xAlxAs double quantum well: effect of external fields(Springer Heidelberg, 2024) Rodriguez-Magdaleno, K. A.; Demir, M.; Ungan, F.; Nava-Maldonado, F. M.; Martinez-Orozco, J. C.In this paper, we report the third harmonic generation in a 12-6 potential profile-shaped GaAs/Ga1-xAlxAs double quantum well. We investigate the effects of the well width size and the presence of the external fields: electric, magnetic, and intense laser. The electronic structure is calculated within the effective mass approximation using a diagonalization method to solve the Schrodinger equation. The expression for third harmonic generation comes from the compact density matrix method. Our results show that the intense laser field effect strongly affects the optoelectronic properties; the electric field (well width) redshifts (blueshifts) the third harmonic generation peaks. Additionally, we observe that the magnetic field has a negligible impact on the studied properties for this potential profile. It is important to stress that the optical signal is in the THz range and that these results can be considered to design possible systems for THz radiation in optoelectronic devices.
