Welcome to the Koç University Institutional Academic Repository
The Koç University Institutional Academic Repository (KUHub Research) is a state-of-the-art academic repository that consolidates all academic outputs—such as articles, conference proceedings, theses, research data, and more—produced by the university since its establishment in 1993.
KUHub Research adheres to the principles of Open Access and FAIR (Findable, Accessible, Interoperable, Reusable), providing access to the bibliographic records, research data, and full texts of research outputs. Equipped with innovative features such as Author Profile pages and enhanced tools, KUHub Research aims to enhance the visibility of researchers both nationally and internationally. KUHub Research aims to preserve and maintain Koç University's valuable academic legacy for future generations while also serving the needs of today’s researchers.
For more information or inquiries please contact openaccess@ku.edu.tr
Recent Submissions
Clinical outcomes and significance of postoperative ultrasound biomicroscopy in patients with Boston type 1 keratoprosthesis
(Consel Brasil Oftalmologia, 2025) Abay, Berk; Taş, Ayşe Yıldız; Müftüoğlu, Orkun; School of Medicine
| Purpose: To determine the clinical outcomes in patients after type 1 Boston keratoprosthesis surgery and the significance of ultrasound biomicroscopy imaging for postoperative follow-up. Methods: This retrospective analysis included 20 eyes of 19 patients who underwent corneal transplantation with type 1 Boston keratoprosthesis between April 2014 and December 2021. Data on patient demographics, preoperative diagnosis, visual acuity, and postoperative clinical findings were analyzed. Results: Type 1 Boston keratoprosthesis implantation resulted in intermediate- and long-term positive outcomes. However, blindness and other serious complications such as glaucoma, retroprosthetic membrane formation, endophthalmitis, or retinal detachment also occurred. The use of ultrasound biomicroscopy imaging allowed for better evaluation of the back of the titanium plate, anterior segment structures, and the relationship of the prosthesis with surrounding tissues, which provided valuable postoperative information. Conclusion: Regular lifetime monitoring and treatment are necessary in patients who undergo Boston type 1 keratoprosthesis implantation for high-risk corneal transplantation. ultrasound biomicroscopy imaging can be a valuable imaging technique for the evaluation of patients with Boston type 1 keratoprosthesis, providing important information on anterior segment anatomy and potential complications. Further studies and consensus on postoperative follow-up protocols are required to optimize the management of patients with Boston type 1 keratoprosthesis. Keywords: Boston Keratoprosthesis; Corneal transplantation; Ultrasound biomicroscopy; Anterior segment; Prostheses and implants
Asymptotically optimal energy consumption and inventory control in a make-to-stock manufacturing system
(Elsevier B.V., 2025) Tan, Barış; Department of Business Administration; Özkan, Erhun; Department of Business Administration; College of Administrative Sciences and Economics
We study a make-to-stock manufacturing system in which a single server makes the production. The server consumes energy, and its power consumption depends on the server state: a busy server consumes more power than an idle server, and an idle server consumes more power than a turned-off server. When a server is turned on, it completes a costly set-up process that lasts a while. We jointly control the finished goods inventory and the server's energy consumption. The objective is to minimize the long-run average inventory holding, backorder, and energy consumption costs by deciding when to produce, when to idle or turn off the server, and when to turn on a turned-off server. Because the exact analysis of the problem is challenging, we consider the asymptotic regime in which the server is in the conventional heavy-traffic regime. We formulate a Brownian control problem (BCP) with impulse and singular controls. In the BCP, the impulse control appears due to server shutdowns, and the singular control appears due to server idling. Depending on the system parameters, the optimal BCP solution is either a control-band or barrier policy. We propose a simple heuristic control policy from the optimal BCP solution that can easily be implemented in the original (non-asymptotic) system. Furthermore, we prove the asymptotic optimality of the proposed control policy in a Markovian setting. Finally, we show that our proposed policy performs close to optimal in numerical experiments. © 2024
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(KU yayınevi, 2024-12-30) bir, bir; test, test; Çanak, Tuba Akbaytürk; Department of Molecular Biology and Genetics; College of Engineering
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‘Disciplining the audience’: audience experiences with MUBI
(SAGE Publications Ltd, 2024) Department of Media and Visual Arts; Ildır, Aslı; Department of Media and Visual Arts; College of Social Sciences and Humanities
Through the case of MUBI, this article inquires into the changing audience habits with the proliferation of video-on-demand services and the discourse of control and choice, increased mobility, and democratic access. Drawing on in-depth interviews with subscribers of MUBI Turkey, this article explores the ways the audience relates to the imagined audience that MUBI assumes, promotes, and celebrates as a cultural gatekeeper and artistic patron/expert;and how, in turn, being a MUBI user becomes a sign of cultural taste. This study argues that even though users appreciate MUBI’s limited choice model compared to Netflix, they still experience feelings such as frustration, stress, and inadequacy. These feelings mainly result from MUBI’s artistic authority over them, established through the discourse of expertise/artistic patronage and limited-time model. On the other hand, users do not automatically accept the service’s expertise. Some are more critical of it than other VOD services (such as Netflix) because they consider watching MUBI a form of ‘intellectual labor’. Even though MUBI discursively maintains the long-standing dichotomies of niche-mainstream, arthouse-popular cinema, or high-lowbrow culture, the users experience these dichotomies more complexly according to their multiple subject positions.
Exploring nursing students' first experiences providing wound and ostomy care to patients: a qualitative study
(Lippincott Williams & Wilkins, 2024) Şengül, Tuba; Karadağ, Ayişe; Kılıç, Havanur; School of Nursing; Graduate School of Health Sciences
BACKGROUNDUndergraduate nursing students experience significant differences between practice with models, manikins, or simulation applications and real patients in a clinical setting. Students' experiences applying their theoretical knowledge to real patient-care practices are little understood. OBJECTIVETo determine the experiences of nursing students in providing skin, chronic wound, and ostomy care to real patients for the first time in a clinical setting within the content of the Ostomy and Wound Care Nursing Track Program (OWCNTP) and to define factors affecting this program. METHODSThe research was conducted qualitatively using the individual critical incident technique, and 17 senior undergraduate nursing students enrolled in the Nursing OWCNTP were selected using a simple random sampling method. In the classroom setting, individual face-to-face interviews were conducted using the critical incident technique. Data were analyzed with inductive content analysis. RESULTSThe research found that students experience genuine caregiving in putting their experiences from the Track Program into practice with real patients in a clinical setting. Three main themes were identified: experiencing real patient care in a clinical setting, being a competent student, and being a novice student. CONCLUSIONSThe study found that nursing students enrolled in the OWCNTP could apply their theoretical knowledge to care for real patients in clinical settings. Therefore, it is recommended that these programs be integrated into nursing curricula.