Browsing by Author "Zerdali, E"

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    Computationally efficient predictive torque control strategies without weighting factors
    Zerdali, E; Altintas, M; Bakbak, A; Mese, E
    Predictive torque control (PTC) is a promising control method for electric machines due to its simplicity, fast dynamics, ability to handle nonlinearities, and easy inclusion of additional control objectives. The main challenge in conventional PTC design is to determine the weighting factors in the cost function. These weighting factors are generally chosen by the trial-and-error method or metaheuristic optimization algorithms, but these methods may not apply the optimum voltage vectors according to changing operating conditions. There are also several studies on the elimination of the weighting factors. This paper proposes two weighting factorless PTC strategies with lower computational complexities than the current literature. To demonstrate the superiority of the proposed methods, their performances are experimentally compared to those of the existing methods through a test bed equipped with an induction motor. Finally, two PTC strategies with a simple design and improved performance are introduced to the literature.
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    Surgical Antimicrobial Prophylaxis Compliance in Turkey: Data from the Prospective, Observational, Multicenter Survey Including 7,978 Surgical Patients
    Ekinci, SÇ; Yenilmez, E; Öcal, GA; Sönmezer, MC; Tarakçi, A; Aygün, C; Akdag, D; Seyman, D; Asik, C; Zerdali, E; Karadag, FY; Kaya, S; Çelik, M; Çifci, S; Yildiz, IE; Çölkesen, F; Akgül, F; Aldemir,Ö; Bozdag, M; Özer, D; Hizmali, L; Ünlü, EC; Altunay, DG; Sahin, A; Ünlue, G; Gencalioglu, AE; Sahin, ST; Özdemir, Y; Ünlü, S; Singil, S; Altintas, J; Isik, SA; Gül,Ö; Tuna, N; Simsek, S; Özgüler, M; Kiliç, PE; Isik, ME; Karakus, A; Kiratli, K; Yardimci, AC; Volkan, S; Olçar, Y; Çakir, Y; Yilmaz, NÖ; Karaayvaz, S; Batirel, A; Duran, ZC; Rasa, HK; Köse, S
    Background: Surgical antimicrobial prophylaxis (SAP) is the peri-operative administration of antimicrobial agents. Compliance rates vary worldwide from 15% to 84.3%, with studies in Turkey not exceeding 35%. The aim of this multicenter study was to determine the rate of appropriate antibiotic class, timing, and duration as well as discharge prescriptions in Turkey. Thus, we aimed to determine the rate of full compliance with SAP procedures in our country Patients and Methods: This multicenter, prospective, observational, descriptive study was conducted in 47 hospitals from 28 provinces in seven different regions of Turkey. Patients over 18 years of age in all surgical units between June 6, 2022, and June 10, 2022, were included in the study. Results: Of the 7,978 patients included in the study, 332 were excluded from further analyses because of pre-existing infection, and SAP compliance analyses were performed on the remaining 7,646 cases. The antibiotic most commonly used for SAP was cefazolin (n = 4,701; 61.5%), followed by third-generation cephalosporins (n = 596; 7.8%). The most common time to start SAP was within 30 minutes before surgery (n = 2,252; 32.5%), followed by 30 to 60 minutes before surgery (n = 1,638; 23.6%). Surgical antimicrobial prophylaxis duration was <24 hours in 3,516 (50.7%) patients and prolonged until discharge in 1,505 (21.7%) patients. Finally, the actual proportion of patients compliant with SAP was 19% (n = 1,452) after omitting 4,458 (58.3%) patients who were prescribed oral antibiotic agents at discharge as part of a prolonged SAP. Conclusions: Surgical antimicrobial prophylaxis compliance rates are still very low in Turkey. Prolonged duration of SAP and especially high rate of antibiotic prescription at discharge are the main reasons for non-compliance with SAP.