Toplam kayıt 10, listelenen: 1-10

    • A cost-effective framework for the optimal placement of drones in smart cities 

      Ülgen, Semail; Al-Turjman, Fadi; Daboul, Reda; Zahmatkesh, Hadi (CRC Press, 2019)
      This chapter presents the existing studies related to the use of unmanned aerial vehicles in the internet of things era. It outlines problem description and the proposed framework. The chapter discusses the performance ...
    • General (α, β)-metrics with constant Ricci and flag curvature 

      Ülgen, Semail (Journal of Finsler Geometry and its Applications, 2022)
      General (α, β)-metrics form a rich and important class of Finsler metrics. Many well-known Finsler metrics of constant flag curvature can be locally expressed as a general (α, β) metrics. In this paper, we study the general ...
    • Hemşire çizelgeleme problemi ve optimzasyonları 

      Bahşi, Nurhayat; Ülgen, Semail; Dorum, Ali Engin (41. Yöneylem Araştırması ve Endüstri Mühendisliği Ulusal Kongresi, 2022)
      Çalışanlar için çizelgeleme sorununun ilk geliştirilip uygulanmasından itibaren, çalışan verimliliği, maliyet düşürme vb. alanlarda önemli başarılar elde edilmiştir. Bu alanda sıklıkla çalışılan hemşire çizelgeleme problemleri ...
    • On a class of Ricci quadratic Finsler metrics 

      Gabrani, Mehran; Sengelen Sevim, Esra; Ülgen, Semail (4th International Conference on Applied Engineering and Natural Sciences, 2022)
      In this paper, we study a class of Finsler warped product metrics with quadratic Ricci curvature. This class is characterized by a partial differential equation. In particular, we obtain a special class of Finsler warped ...
    • On a non-Riemannian quantity of (α, β)-metrics 

      Ülgen, Semail (Sigma Journal of Engineering and Natural Sciences, 2022)
      In this paper, we study a non-Riemannian quantity χ-curvature of (α, β)-metrics, a special class of Finsler metrics with Riemannian metric α and a 1-form β. We prove that every (α, β)-metric has a vanishing χ-curvature ...
    • On Einstein Finsler metrics 

      Ülgen, Semail; Sevim, Esra Sengelen; Hacinliyan, İrma (World Scientific Publishing Company, 2021)
      In this paper, we study Finsler metrics expressed in terms of a Riemannian metric, a 1-form, and its norm and find equations with sufficient conditions for such Finsler metrics to become Ricci-flat. Using certain ...
    • On Ricci-quadratic Finsler metrics 

      Sengelen Sevim, Esra; Shen, Zhongmin; Ülgen, Semail (4th International Conference on Applied Engineering and Natural Sciences, 2022)
      In this paper, the Ricci curvature is defined for sprays on a manifold and every spray with a volume form on a manifold can be deformed to a projective spray. The quadratic Ricci curvature of a projective spray is called ...
    • On some Ricci curvature tensors in Finsler geometry 

      Sengelen Sevim, Esra; Shen, Zhongmin; Ülgen, Semail (4th International Conference on Applied Engineering and Natural Sciences, 2022)
      In this paper we discuss several Ricci curvature tensors and their relationship with the Ricci curvature and some non-Riemannian quantities. By these Ricci curvature tensors, we shall have a better understanding on the ...
    • Optimizing the liver/kidney organ donation waiting list in Antalya using maxsat and graph model 

      Ülgen, Semail; Yangın, Elifnaz (International Conference on Industrial Engineering and Operations Management, 2022)
      Organ transplantation has become an increasing need in the world and in our country. Organ transplantation is completed by taking healthy and matched organs from living or cadaver donors and transplanting them to the ...
    • Tarımda su tasarrufu sağlayan sulama aparatının geliştirilmesi 

      Ülgen, Semail; Aydınşakir, Köksal; Kayhan, Merve; Aktaş, Ümmiye; Doğan, Berfin; Ödemiş, Eşe Nur (41. Yöneylem Araştırması ve Endüstri Mühendisliği Ulusal Kongresi, 2022)
      Küresel ısınma su kaynaklarının önemini artırmaktadır. İklim değişikliği nedeniyle su kaynaklarındaki azalmanın, tarımsal üretim üzerinde olumsuz bir etkisi bulunmaktadır. Ülkemizde kullanılan toplam suyun yaklaşık %74'ü ...