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Papers by orhan sivrikaya
Bu proje gelecege yonelik yolcu trafigini tahmin ederek ihtiyac olacak ucak sayisini ve tanimli u... more Bu proje gelecege yonelik yolcu trafigini tahmin ederek ihtiyac olacak ucak sayisini ve tanimli ucak tiplerini en iyi seki1de tesbit etme amacini tasimaktadir. Maliyet gider1eri ve yolcu tahminleri dikkate alinarak karar degisken parametreleri tanimlanacak ve lineer program modeli olusturulacaktir. Bu amacla yolcu tahmin metodlari kullani1acaktir. En uretken seki1de kullani1acak ucak filosunu olusturacak, uzun donem bazinda prototip ucak filosunun ucak saylsl ve tiplerine gore teskil l e 어 di1me 엉 sini saglayacak sonuclar elde edi1ecektir.
Journal of Revenue and Pricing Management, 2021
Fare allocation for legs and O&D pairs plays a crucial role in airline revenue management. De... more Fare allocation for legs and O&D pairs plays a crucial role in airline revenue management. Despite a large number of dynamic pricing studies, there are only a few widely adopted studies in which assumptions affect most tactical decisions with potentially large impacts on airline profitability. These decisions involve approximating future pricing schemes, allocation of fare classes, and setting booking limits. We propose a fare allocation model for a single leg in the presence of a realistic nonhomogeneous Poisson demand with an increasing rate. We aim to compute when and how to markup the price for an airfare product (switch to an upper fare class) to maximize the expected revenue. We study a fluid approximation of the underlying stochastic problem considering independent demand from each customer segment and examine different properties that lead to several important insights. Finally, we propose a dynamic look-ahead pricing scheme to compare our fluid approximation results against the well-known EMSRb heuristic and a dynamic programming solution on randomly generated booking request data. Numerical examples illustrate the effectiveness of our proposed approach.
The Open Transportation Journal, 2013
introduction Patients have the right to influence the care they receive, but their wish to partic... more introduction Patients have the right to influence the care they receive, but their wish to participate in care decision-making is unclear. Aim This study investigates whether participation in nursing documentation influences patient participation in care decision-making, mastery, self-esteem, empowerment and depressive feelings among adult in-patients with chronic disease. Materials and Methodology Adult patients (n=39) with chronic diseases were randomized. The intervention group participated in nursing documentation. Upon departure, patients filled in questionnaires about participation in care decision-making, mastery, self-esteem, empowerment and depressive feelings. Results The majority of the patients preferred a collaborative or passive role regarding care decision-making. Lack of knowledge was one reason for non-participation. Having been diagnosed more than five years previously meant stronger empowerment. Conclusion It is a challenge for nurses to find strategies to assess ...
Bu proje gelecege yonelik yolcu trafigini tahmin ederek ihtiyac olacak ucak sayisini ve tanimli u... more Bu proje gelecege yonelik yolcu trafigini tahmin ederek ihtiyac olacak ucak sayisini ve tanimli ucak tiplerini en iyi seki1de tesbit etme amacini tasimaktadir. Maliyet gider1eri ve yolcu tahminleri dikkate alinarak karar degisken parametreleri tanimlanacak ve lineer program modeli olusturulacaktir. Bu amacla yolcu tahmin metodlari kullani1acaktir. En uretken seki1de kullani1acak ucak filosunu olusturacak, uzun donem bazinda prototip ucak filosunun ucak saylsl ve tiplerine gore teskil l e 어 di1me 엉 sini saglayacak sonuclar elde edi1ecektir.
Journal of Revenue and Pricing Management, 2021
Fare allocation for legs and O&D pairs plays a crucial role in airline revenue management. De... more Fare allocation for legs and O&D pairs plays a crucial role in airline revenue management. Despite a large number of dynamic pricing studies, there are only a few widely adopted studies in which assumptions affect most tactical decisions with potentially large impacts on airline profitability. These decisions involve approximating future pricing schemes, allocation of fare classes, and setting booking limits. We propose a fare allocation model for a single leg in the presence of a realistic nonhomogeneous Poisson demand with an increasing rate. We aim to compute when and how to markup the price for an airfare product (switch to an upper fare class) to maximize the expected revenue. We study a fluid approximation of the underlying stochastic problem considering independent demand from each customer segment and examine different properties that lead to several important insights. Finally, we propose a dynamic look-ahead pricing scheme to compare our fluid approximation results against the well-known EMSRb heuristic and a dynamic programming solution on randomly generated booking request data. Numerical examples illustrate the effectiveness of our proposed approach.
The Open Transportation Journal, 2013
introduction Patients have the right to influence the care they receive, but their wish to partic... more introduction Patients have the right to influence the care they receive, but their wish to participate in care decision-making is unclear. Aim This study investigates whether participation in nursing documentation influences patient participation in care decision-making, mastery, self-esteem, empowerment and depressive feelings among adult in-patients with chronic disease. Materials and Methodology Adult patients (n=39) with chronic diseases were randomized. The intervention group participated in nursing documentation. Upon departure, patients filled in questionnaires about participation in care decision-making, mastery, self-esteem, empowerment and depressive feelings. Results The majority of the patients preferred a collaborative or passive role regarding care decision-making. Lack of knowledge was one reason for non-participation. Having been diagnosed more than five years previously meant stronger empowerment. Conclusion It is a challenge for nurses to find strategies to assess ...