Yayınlar
Koleksiyondaki öğeler
- BildiriYalnız künye2017Harvesting Solar Energy for Limited-Energy Problem in Wireless Sensor Networks
Kosunalp, Selahattin; Cihan, Ahmet
The major problem in wireless sensor networks (WSNs) is the limited-energy source, typically small batteries, employed by sensors. In order to prolong the lifetime of the WSNs, a lot of approaches have taken the limited-energy problem as a primarily design criterion. However, inevitable energy depletion will eventually disturb the operation of the WSNs. Recent studies have shown that renewable energy sources would potentially provide an infinite energy source for powering WSNs. Solar energy is the most effective energy source for WSNs as it has the largest power intensity. Therefore, each sensor which requires a small amount of energy for efficient operation can harvest sufficient energy from solar. In this study, a platform is designed in order to allow sensors to exploit solar energy. The performance of the sensors in terms of the lifetime is practically studied. The results demonstrate that sensors can also survive when there is no energy available through storing energy in a super-capacitor. IRIS nodes are used in experiments as they are very popular in WSNs domain.
- DüzeltmeAçık Erişim2025The Relationship Between Thirst Distress and Severity and Compliance with Fluid Control and Interdialytic Weight Gain in Hemodialysis Patients (vol 13, pg 129, 2025)
Cin, Aynur; Demirag, Hatice; Dastan, Buket; Hintistan, Sevilay
- BildiriAçık Erişim2018Scopus SJRQ1Fabrication of propolis loaded electrosprayed nanoparticles
Özmen, Duygu; Karakas, Canan Yagmur; Yilmaz, Azime; Dertli, Enes; Bayram, Nesrin Ecem; Yilmaz, Mustafa Tahsin
AtıfWoS1OpenAlex1
İncele - MakaleAçık Erişim2020Forecasting the movements of Bitcoin prices: an application of machine learning algorithms
Pabuçcu, Hakan; Ongan, Serdar; Ongan, Ayse
Cryptocurrencies, such as Bitcoin, are one of the most controversial and complex technological innovations in today's financial system. This study aims to forecast the movements of Bitcoin prices at a high degree of accuracy. To this aim, four different Machine Learning (ML) algorithms are applied, namely, the Support Vector Machines (SVM), the Artificial Neural Network (ANN), the Naive Bayes (NB) and the Random Forest (RF) besides the logistic regression (LR) as a benchmark model. In order to test these algorithms, besides existing continuous dataset, discrete dataset was also created and used. For the evaluations of algorithm performances, the F statistic, accuracy statistic, the Mean Absolute Error (MAE), the Root Mean Square Error (RMSE) and the Root Absolute Error (RAE) metrics were used. The t test was used to compare the performances of the SVM, ANN, NB and RF with the performance of the LR. Empirical findings reveal that, while the RF has the highest forecasting performance in the continuous dataset, the NB has the lowest. On the other hand, while the ANN has the highest and the NB the lowest performance in the discrete dataset. Furthermore, the discrete dataset improves the overall forecasting performance in all algorithms (models) estimated.
AtıfWoS25OpenAlex65İncele - MakaleAçık Erişim2025The Relationship Between Thirst Distress and Severity and Compliance with Fluid Control and Interdialytic Weight Gain in Hemodialysis Patients
Cín, Aynur; Demírag, Hatice; Dastan, Buket; Híntístan, Sevilay
knowledge scores and FCHPS subscale attitude scores, and IDWG and FCHPS subscale attitude scores. A positive correlation was also found between the VAS score and IDWG. Conclusion: Thirst distress was higher than the moderate level in HD patients, and IDWG increased as thirst severity (VAS score) increased.knowledge scores and FCHPS subscale attitude scores, and IDWG and FCHPS subscale attitude scores. A positive correlation was also found between the VAS score and IDWG. Conclusion: Thirst distress was higher than the moderate level in HD patients, and IDWG increased as thirst severity (VAS score) increased.
AtıfWoS1
İncele - MakaleYalnız künye2021Scopus SJRQ4Influence of the Infusion Time on the Phenol Content and the antioxidative Activity of Herbal and Fruit Teas
Kara, H. H.; Erdogan, T.; Demirbas, F.; Bor, Y.; Cakiroglu, K. Aksehir
- BildiriAçık Erişim2017Scopus SJRQ1Determination of the Antigenotoxic effects of Evernic acid against genotoxic effects of CCL4 on HUVEC lines
Agar, Guleray; Kizil, Hamit Emre; Ceker, Selcuk; Capik, Ozel; Sengul, Bulent
- BildiriAçık Erişim2014Scopus SJRQ1Catalase positive cocci and volatile compounds in fermented sausages
Kamiloglu, Aybike; Sayin, Bilge; Kaban, Guzin; Kaya, Mukerrem
- MakaleAçık Erişim2019Do We Know Organic Food Consumers? The Personal and Social Determinants of Organic Food Consumption
Ünal, Sevtap; Deveci, F. Gorgun; Yildiz, Tugba
The main aim of this study is determining which consumption motives and personal and social factors affect organic food buying decisions. Ajzen's Planned Behavior Theory (TPB) is used to explain consumers' organic food selection behaviors. In addition, the moderating role of uncertainty about organic foods and the mediating role of the price of organic foods were tested. Data were gathered via a survey of consumers of organic foods in Turkey. The research model was tested by Structural Equation Modeling (SEM) via Smart PLS3. The findings showed that consumptions motives of healthiness, easiness, mood, and convenience-price of organic foods motivate consumers to buy organic foods. In addition, environmental concern and negative emotions influence on attitudes towards organic foods and purchase intentions. On the other hand, subjective norms and self-monitoring do not influence attitudes towards organic foods and subsequent purchase intentions. Uncertainty has a moderating effect on the relationship between attitudes and purchase intentions whereas price has no mediating effect on the relationship between attitudes and purchase intentions.
AtıfWoS11OpenAlex19İncele - MakaleAçık Erişim2020Scopus SJRQ1Physical and mechanical properties of cement containing regional hazelnut shell ash wastes
Baran, Y.; Gökçe, H. S.; Durmaz, M.
Turkey is ranked in the first place with two-thirds of the world hazelnut production. As the amount of shell obtained from shelled-hazelnut is almost equal to that of hazelnut by weight, the shell is a regionally important waste. The biomass is consumed as a fuel in some homes, workplaces, and public buildings with the help of specific caldrons. In the study, the use of ash was researched in the production of blended cement. For this purpose, blended cement mixtures containing hazelnut shell ash at the ratios of 0, 5, 10, 15, 20, 25 and 30% by weight of CEM I 42.5R ordinary Portland cement were prepared. The binary cementitious systems were assessed in terms of chemical, physical and mechanical properties. Hazelnut shell ash introduction increased the water demand up to 59% for standard consistency and reduced setting time up to 96% according to the ordinary Portland cement. Compressive strength results were remarkably reduced by an increase in the amount of ash. With over 5% of hazelnut shell ash introduction, the 28-d compressive strength value was found unsatisfactory (<42.5 MPa). The insufficient total amount of SiO2+Fe2O3+Al2O3 reduced the usage amount of the biomass ash in cementitious products due to having no pozzolanic characteristic. Hazelnut shell ash can be used as an alkaline set accelerator in concrete products as it is not steel-reinforced due to its high chlorine ion content. (C) 2020 Elsevier Ltd. All rights reserved.
AtıfWoS35OpenAlex41İncele - MakaleAçık Erişim2025EFFECT OF SCRAP RATIO ON LIQUID METAL QUALITY OF LOW-PRESSURE DIE-CASTING (LPDC) ALLOY USING ROTARY DEGASSING
Tokatli, Mehmet; Çolak, Murat; Yüksel, Caglar
Although various processes are used in aluminum liquid metal cleaning, environmentally friendly, economical and applicable methods should be preferred in industry. Among these methods, the Density Index test based on the reduced pressure test (RPT), which is widely used to measure the efficiency of the rotary degassing process, and the K-mold test method, which offers fast and practical results were carried out. The effects of rotary degassing method on the liquid metal quality of AlSi7Mg0.3 (A356) aluminum alloy charges prepared with different proportions of scrap and ingots were evaluated using a constant 5l/min gas flow rate, a constant 5 min process time and a constant 300 rpm rotor rotation speed. The results show that the Density Index values can be reduced from 1.48% to around 0.74% with increasing scrap rate, while K-mold values can be reduced from 2.8 to 0.6. It was also shown that the rotary degassing method is effective in liquid metal cleaning, and the K-mold test can be used as a very practical control tool for evaluating liquid metal quality.
- MakaleAçık Erişim2026Perception of Organizational Sycophancy in Universities: A Research on Academicians
Aribas, Ayse Nihan; Esmer, Yusuf; Yüksel, Muhammet
Today, it is seen that unethical behaviors are diversifying in universities, which are accepted as value-based organizations. Sycophancy, which is an unethical behavior in universities where the hierarchical structure is evident, emerges as an important issue in academic circles. The purpose of this study is to examine the perception of organizational sycophancy in universities. In the study, 36 academicians were interviewed within the scope of qualitative research method. The answers given by the academics were processed in depth within the scope of the themes determined in accordance with the content analysis technique. The results of the study showed that sycophantic behavior is quite common in universities, that it leads to various negative consequences in the academic environment, and that there are many factors that lead to sycophantic behavior. In conclusion, organizational sycophancy is a phenomenon intertwined with academic success, cooperation and organizational culture in universities. The role of sycophantic behaviors, the attitudes of academics towards managers and the place of these attitudes in organizational structures is a topic that requires more research in academic circles. In this context, studies on sycophancy in universities provide important information for academic success and improvement of the work environment.
- BildiriYalnız künye2015DIRECT AND FAST GROWTH OF A SI:GAAS THIN FILM BY MEANS OF THERMIONIC VACUUM ARC (TVA)
Senay, Volkan; Özen, Soner; Pat, Suat; Korkmaz, Sadan
AtıfWoS2İncele - MakaleAçık Erişim2023The Effect of 2023 Kahramanmaraş and Hatay Earthquakes on Real Estate Investment Behaviors
Çubukcu, M. Ihsan; Çubukcu, Fatmanur; Doker, Asli Cansin; Gülhan, Unal; Gülhan, Yeliz
Turkiye is located in the earthquake zone due to its geographical location and has witnessed major earthquakes throughout history. These earthquakes caused many deaths and also caused great economic losses. In February 2023, Mw7.7, Mw7.6, Aand Mw6.4 earthquakes occurred centered in Kahramanmara & scedil; and Hatay, respectively. More than 50 thousand people lost their lives and more than 100 thousand people were injured in these earthquakes. The earthquake caused great destruction in 11 provinces (Adana, Ad & imath;yaman, Diyarbak & imath;r, Elaz & imath;& gbreve;, Gaziantep, Hatay, Kahramanmara & scedil;, Kilis, Malatya, Osmaniye and & Scedil;anl & imath;urfa). The study aims to identify differences in investment behavior in the real estate sector after the earthquake. For this purpose, a survey was conducted throughout T & uuml;rkiye. According to the empirical findings of the study, significant differences were detected between real estate investment behaviors before and after the earthquake. It was observed that the participants took into account factors such as whether the building was built in accordance with earthquake regulations rather than factors such as location, interior and exterior design, and price, when making investments after the earthquake. It was also determined that the participants preferred detached or low-rise buildings instead of multi-storey buildings after the earthquake.
AtıfOpenAlex1İncele - MakaleAçık Erişim2024Investigation of the nutritional habits of students receiving coaching education: a cross-sectional study
Kirkbir, Hakan; Tanyeri, Ozge Sezik; Hacicaferoglu, Serkan
Background and Study Aim Material and Methods The aim of this study is to examine the nutritional knowledge levels and habits of the students who will work in the field of sport sciences in Turkey and who are studying in the Faculties of Sport Sciences. The sample of the study consisted of 186 volunteer university students studying in the coaching departments of the Faculties of Sport Sciences, selected by simple random sampling method. General scanning model was used in the research. The data in the study were collected using the 32-item Nutrition Knowledge Scale for Adults. Results Within the scope of the scores in both sub-dimensions of the scale, it was determined that the perception scores of the participants in terms of independent variables were statistically close to each other and they had knowledge about nutrition in general. It was determined that there was a statistically significant difference between the nutritional knowledge levels according to the age variable, and the effect level was close to the middle. It was determined that there was no significant difference between other variables and nutrition. Conclusions In addition to a healthy life, healthy nutrition is important for coaches in the continuity of their professional life. It would be beneficial to have more information about nutrition in school curriculum. This will contribute to the fight against obesity, which is today's disease.
AtıfWoS1OpenAlex1İncele - BildiriAçık Erişim2014Scopus SJRQ1Probiotic meat products
Sayin, Bilge; Kamiloglu, Aybike; Kaya, Mukerrem; Kaban, Guzin
AtıfOpenAlex1İncele - MakaleAçık Erişim2023STRATEGIC MARKETING MANAGEMENT IN SMES: THE CASE OF L?LEBURGAZ
Saylan, Onur; Esmer, Yusuf; Çelik, Pelin
Due to the changing conditions and new developments in the business world in recent years, SMEs in Turkey need to adopt a strategic marketing management approach in order to be successful and gain competitive advantage. Strategic marketing management, on the other hand, is the process of managers developing marketing strategies by identifying the strengths and weaknesses, threats and opportunities of the business towards marketing and applying these strategies. In this study, it is aimed to develop strategies for the marketing activities of these enterprises and to contribute to the relevant literature by making strategic analyzes of SMEs in the context of marketing, based on the example of Luleburgaz. For this purpose, first of all, the strengths and weaknesses, threats and opportunities of 17 SMEs operating in Luleburgaz district were determined by using the SWOT analysis technique. Then, based on the data obtained, 4 basic marketing strategies were developed by applying the expert opinion and using the SWARA method. These; (1) using quality materials and producing quality products to sell quality products, (2) developing a digital customer relationship management system, (3) engaging in digital and social media marketing activities, (4) reducing raw material costs.
AtıfOpenAlex2TR Dizin2İncele - MakaleAçık Erişim2024HG-CONVEX FUNCTIONS
Gülsu, Nagihan kurt; Iscan, Imdat; Kadakal, Mahir; Bekar, Kerim
In this paper, the concept of Hg-convex function is given for the first time in the literature. Some inequalities of Hadamard's type for Hg-convex functions are given. Some algebraic properties of Hg-convex functions and special cases are discussed. In addition, we establish some new integral inequalities for Hg-convex functions by using an integral identity.
- BildiriYalnız künye2015MO DOPED GAN THIN FILM GROWTH USING THERMIONIC VACUUM ARC (TVA)
Özen, Soner; Pat, Suat; Korkmaz, Sadan; Senay, Volkan
AtıfWoS1İncele - MakaleYalnız künye2025ASSESSING THE SUSTAINABILITY PERFORMANCE OF ROAD TRANSPORT: ANALYSIS OF EUROPEAN UNION COUNTRIES
Izgy, Fatma; Dereli, Zeynep; Aydemir, Aslihan
Road transport plays a crucial role in the European Union's transition toward climate-neutral mobility; however, significant differences persist among Member States in terms of sustainability performance. This study evaluates the sustainability performance of road transport systems in 26 EU countries to understand their comparative positions in this transformation process. Using a comprehensive dataset from 2021, an integrated Multi-Criteria Decision-Making (MCDM) approach was employed, combining the Entropy method for objective criteria weighting and the EDAS method for performance ranking. The analysis reveals that Traffic Accidents, GDP, and Vehicle Usage are the most influential factors driving sustainability scores. Among the evaluated nations, France, Czechia, and Denmark achieved the highest performance rankings. The original contribution of this study lies in its application of an entropy-EDAS multi-criteria framework to evaluate the 2021 sustainability performance of road transport systems in 26 EU countries, providing a systematic, data-driven basis for comparing Member States' performance.
