BelekUniversity Institutional Repository
DSpace@Belek digitally stores academic resources such as books, articles, dissertations, bulletins, reports, research data published directly or indirectly by Antalya Belek University at international standards, helps track the academic performance of the university, provides long term preservation for resources and makes publications available to Open Access in accordance with their copyright to increase the effect of publications.
Recent Submissions
Clinical and sociodemographic differences in adult women and men with obsessive-compulsive disorder
(Yerküre Tanıtım & Yayıncılık Hizmetleri A.Ş., 2024) Çoban, Deniz Adnan; Tan, Oğuz; Gündoğmuş, İbrahim
Objective: Gender is related to differences in the prevalences, manifestations and comorbidities of mental disorders. Findings on the effect of sex on adults with obsessive-compulsive disorder (OCD) are limited and inconsistent. We aimed to compare male and females with OCD in a large sample of adults. Methods: We included 559 patients with OCD (299 females, 50.68%). We employed the Yale-Brown Obsession and Compulsion Scale (Y-BOCS), Hamilton Depression Rating Scale-17 (HDRS-17) and Beck Anxiety Inventory (BAI). We gathered data about the onset of illness, the years of education, marital status, long-term unemployment, history of hospitalization and suicide attempts, lifetime attention deficit and hyperactivity disorder (ADHD), tic disorder, alcohol use disorder (AUD), substance use disorder (SUD), smoking and symptom dimensions. Results: The Y-BOCS, HDRS-17 and BAI scores were significantly higher in women. Men were characterized by earlier onset of OCD, younger age, longer years of education, higher prevalence of past or current tic disorders and higher frequency of AUD/SUD and smoking. Ratio of being married was higher among women whereas most of males were never-married. History of suicide attempt was more common among women. Conclusion: Our research offers additional support for variations in clinical characteristics of OCD based on gender. It is essential to investigate the biological foundation of gender differences on OCD.
An approach to Euler-Mascheroni constant by Bernoulli numbers
(AMER INST PHYSICS, 2020) Aygüneş, Aykut Ahmet
In this paper, we give two different versions of the Euler-Maclaurin summation formula. By using these formulae, we obtain special series including the Bernoulli numbers and Riemann zeta function. Consequently, we show that this series is calculated by Euler-Mascheroni constant.
Effect of process parameters on stevioside and rebaudioside a content of stevia extract obtained by decanter centrifuge
(WILEY, 2021) Arslan Kulcan, Aslı; Karhan, Mustafa
The aim of this research is to determine the possibility of decanter extraction for the isolation of steviol glycosides from stevia leaves. Extraction parameters such as temperature, time, and leaf/water ratio were optimized by using Response Surface Methodology. The optimal combination determined as a result of optimization studies was 25 degrees C, 1/27.6 leaf/water ratio, and 105 min extraction time. Under these conditions, experiments were carried out at three different speeds of 4,500, 4,900, and 5,280 rpm (2,264, 2,684, 3,117 g, respectively) in a decanter extraction system to investigate the effect of rotational speed. The amount of stevioside in samples obtained at 4,500, 4,900, and 5,280 rpm was 1080.82, 1919.18, and 2507.35 mg/L, respectively. The amount of rebaudioside A was 761.34, 1417.17, and 1801.93 mg/L, respectively. Results showed that the rotational speed of the decanter had a considerable effect on all the parameters examined. Practical applications Stevia is a product that is widely used in food formulations in the scope of combating obesity and diabetes. In this study, the decanter was applied for the first time to extract stevia leaves and optimum process conditions for decanter extraction of steviol glycosides were determined. It has been observed that stevia extraction can be successfully performed at 25 degrees C with high efficiency using decanter. The yield of the extract increased with increasing decanter rotational speed. The decanter extracted 73% of the total stevioside and rebaudioside A present in the leaves. The results of this study may be used by manufacturers who want to process the stevia plant with more economical and environmentalist approaches.
Exploring the criteria for a green and smart hotel: Insights from hotel managers' perspectives
(EMERALD GROUP PUBLISHING LTD, 2024) Akel, Gökhan; Noyan, Elçin
PurposeThis study aimed to explore the adaptations and perspectives of hotel managers regarding green and smart hotel technologies within the context of sustainability.Design/methodology/approachA comprehensive literature review guided the formulation of this study, followed by face-to-face, semi-structured interviews with hotel managers. A total of 17 prepared questions were finalized after examination by two expert academicians. The responses were analyzed using qualitative research methodology and the results were weighted using the step-wise weight assessment ratio analysis (SWARA) method.FindingsInterviews with sustainability and operational managers yielded insights into environmentally friendly practices and strategies such as reducing energy and water consumption, waste and chemical reduction, supporting local entrepreneurs and adopting smart technologies. These factors are crucial in eco-friendly hotels. According to the SWARA analysis, 'reducing energy consumption' is the most effective criterion.Research limitations/implicationsThis study offers insights into green and smart hotel management by focusing on the perspectives of hotel managers with a small sample. In future studies, research with larger samples on customer perspectives and the effect of hotel selection is recommended.Practical implicationsThis study offers insights to hotel managers on energy conservation and customer satisfaction enhancement through green and technological applications. These technological applications can improve hotel service quality and provide personalized experiences, fostering customer loyalty.Originality/valueThis pioneering study focuses on the intersection of green and smart practices in hospitality. By intertwining the often separately discussed concepts of green and smart, this study presents a novel approach to the sustainability practices in the hospitality industry, holding a key position, especially in Turkey. Implementing these concepts can yield environmental and economic benefits, offering invaluable insights to hotel managers and policymakers into integrating smart technologies with sustainability.
Priority based vehicle routing for agile blood transportation between donor / client sites
(IEEE, 2017) Karakoç, Mehmet; Günay, Melih
In this paper, we study Vehicle Routing Problem (VRP) for Blood Transporters (BTs) and propose an efficient vehicle routing scheme for blood transportation between hospitals or Donor/Client Sites (DCSs) within a region that is based on Artificial Intelligence. It is assumed that each BT in a fleet of vehicles starts and completes its route at a blood-bank while visiting a subset of DCSs using the shortest path. However, unlike traditional logistic planning, blood transportation may be time critical. Therefore, in our approach, the vehicle routing is formulated to take into account the urgency of the requests and responses. Consequently, the objective of this study is to minimize the number of BTs while maintaining their minimum traveling lengths considering priority. In this regards, we extended the classical Capacitated VRP (CVRP) and reformulated requests to take into account the priority by assigning weight to each request. A hybrid meta-heuristic algorithm including Genetic Algorithms and Local Search is used to simulate transporting blood requests of DCSs. We challenged our approach with symmetrical CVRP instances taken from literature. In this case study, we observed that both the cost and response time are reduced dramatically for emergency.
