Koleksiyon/r/bayburt/10001

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Koleksiyondaki öğeler

  • MakaleYalnız künye2022
    INEQUALITIES OF HERMITE-HADAMARD TYPE FOR n-TIMES DIFFERENTIABLE ARITHMETIC-HARMONICALLY FUNCTIONS

    Kadakal, Huriye

    In this work, by using an integral identity together with both the Holder and the power-mean integral inequalities we establish several new inequalities for n-times differentiable arithmetic-harmonically-convex function. Then, using this inequalities, we obtain some new inequalities connected with means. In special cases, the results obtained coincide with the well-known results in the literature.

    AtıfWoS1
    Web of Scienceİncele
  • MakaleYalnız künye2023
    MULTIPLICATIVELY PREINVEX P-FUNCTIONS

    Kadakal, Huriye; Kadakal, Mahir

    In this study, using both Holder's integral inequality and Holder-Iccan integral inequality, some inequalities of Hermite Hadamard type obtained for multiplicatively preinvex P -functions are given. Afterwards, the result obtained with Holder-Iccan inequality has been shown to be better than that obtained with Holder's integral inequality.

    AtıfWoS19
    Web of Scienceİncele
  • MakaleAçık Erişim2023
    Development of self-regulation scale for middle school students: Validity and reliability study

    Sarikaya, Ismail; Ozturk, Mesut; Ozgol, Mustafa

    This study was conducted to develop a valid and reliable measurement tool that can identify middle school students' self-regulation skills. Firstly, the literature was utilized in the development of the measurement tool. The form was finalized with the support of the opinions of different experts and a trial application. Then, the form was administered to 341 middle school students to determine its construct validity, and exploratory factor analysis (EFA) was performed on the collected data. Then, the form was administered to 341 middle school students to determine its construct validity, and exploratory factor analysis (EFA) was performed on the collected data. As a result of the study, it was determined that the scale consisted of 9 items and two sub-dimensions, namely forethought and volitional control and self-reflection. In order to reveal the reliability of the scale, internal consistency, two-half test analyses, and composite reliability (CR) were used, and it was determined that the values found were .74 and above. In order to reveal the accuracy of the obtained structure, data were collected from 218 middle school students in a different province, and confirmatory factor analysis (CFA) was performed with these data. As a result of the analysis, the two-factor structure of the scale was confirmed. When the findings are examined, it can be said that the scale is a reliable and valid tool that can be applied to determine the self-regulation skills of students studying at the middle school level.

    • SDG 4 · Nitelikli Eğitim
    AtıfWoS1OpenAlex4TR Dizin2
    Web of ScienceTR Dizinİncele
  • MakaleYalnız künye2018Scopus SJRQ3
    THE COOPERATION BETWEEN METHYL JASMONATE AND SALICYLIC ACID TO PROTECT SOYBEAN (GLYCINE MAX L.) FROM SALINITY

    Seckin-Dinler, Burcu; Tasci, Eda; Sarisoy, Ufkun; Gul, Volkan

    Methyl jasmonate (MeJA), a methyl ester of jasmonic acid, is a naturally produced phytohormone that regulates plant growth and development by maintaining the morphologic, physiological, and biochemical development of plants. The purpose of this study was to determine the effect of methyl jasmonate and endogenous salicylic acid on the stimulation and scavenging of reactive oxygen species (ROS) under salt stress in soybean roots and leaves. Soybean leaves were sprayed with 0.5 mu M methyl jasmonate for 4 days, followed by exposure to 200 mM NaCl. Foliar application of MeJA did not change the leaf area; however, it increased the relative water content (RWC), chlorophyll content, relative electrolyte leakage (REL), and root and shoot fresh weight, and it lessened the stress-induced oxidative damage by decreasing the levels of hydrogen peroxide (H2O2), malondialdehyde (MDA). Curiously, catalase (CAT) enzyme and isoenzyme activity, and also endogenous salicylic acid (SA) were decreased by MeJA treatment. As a result, this study firstly determined that MeJA treatment improved the soybean performance under salinity by acting role as an antioxidant and cooperating with SA.

    AtıfWoS4
    Web of Scienceİncele
  • MakaleAçık Erişim2025Scopus SJRQ1
    Energy, exergy and economic optimization application of integrated dual-loop organic rankine cycle: A case of shopping mall power plant

    Topcu, Muhammed Taha; Tozlu, Alperen; Bilen, Kadir

    This paper presents a thermoeconomic analysis of the Dual-Loop Organic Rankine Cycle (DORC) integrated into the Erzurum Mall Power Plant (EMPP). The DORC system is designed to utilize waste heat at 425 degrees C and 9 kg/s, producing additional power for the existing plant. The integration of dual-loop ORC systems with different critical temperature fluids into an operational facility is analyzed. High-temperature cycles use working fluids such as Toluene, MDM (octamethylcyclotrisiloxane), n-Nonane, and n-Octane, while refrigerants R236fa, R600a, and R124 are employed in the low-temperature cycles. The designed model demonstrates that up to 11.4 % of the plant's existing capacity can be added as extra power. The Toluene/R600a combination is identified as the best fluid pair, delivering the highest total net power output (653.4 kW), the lowest total cost rate (19.18 $/h), and the highest exergy efficiency (20.18 %). Optimization of the DORC system is performed using the NSGA-II in MATLAB. For the toluene/R600a pair, the optimization results show an increase of 13.52 % in the net power output and decrease of 1.48 % in the total cost rate, which is a significant improvement over the initial results.

    • SDG 7 · Erişilebilir ve Temiz Enerji
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 12 · Sorumlu Üretim ve Tüketim
    AtıfWoS3OpenAlex1
    Web of Scienceİncele
  • MakaleAçık Erişim2012
    Mediation in Islamic Jurisprudence

    Sen, Yusuf

    The conflict resolution is the most fundamental matter that is all legal systems must carry out. People who have problems between themselves find solutions to their issues through the reconcilation, the mediation, the peace/sulh, the arbitration/consolidation and the court of law. In this paper mediation is pointed out as one of the methods of the conflict resolution. Concept analysis regarding to the meditaon is being made and also the comparision between sulh/peace and other conflict resolution methods are being done. In order to provide adequate ground for the mediation, the Quran and the prophet's practices are examined. Morever, the application of the mediation in the contemprary world is discussed. The procces of the mediation and the qualifications that are asked from the mediator are explained. The paper is ended at the conclusion part with the thoughts and the considerations.

    • SDG 16 · Barış, Adalet ve Güçlü Kurumlar
    AtıfWoS2OpenAlex16
    Web of Scienceİncele
  • MakaleYalnız künye2022Scopus SJRQ2
    Crafts and Craftmanship in Bayburt Province as an Example of the Problems Faced in Transmission of Intangible Cultural Heritage

    Kabak, Uyesi Turgay

    Trading is one of the first planned and organized activities that mankind put forward after his life on earth started. Because human beings are not a being that can meet all their needs by themselves. They also need what other people produce in order to survive. People all over the world have developed different organizations in order to meet this need, which has led to the birth of trade, professions and money flow. The Ahiorder organization developed by the Turks in Anatolia and its surroundings and the craftsmen within this organization met all the goods and services needed by the Turkish people in the past with an intensive way of working. However, these crafts and the activities of the craftsmen performing these should not be considered merely as commercial activities. Because a very rich tangible and intangible cultural heritage has also been formed around these activities. The purpose of this study is to examine the situation of the five facing extinction among the handicrafts in Bayburt province, which are one of the first forms of production and have a production process intensive by hand. Document analysis and field research methods, which are among qualitative research methods, were used in this study. Observation and interview techniques were used in the field research. Then, the data obtained were examined in the light of the relevant literature and it was determined that even in the province of Bayburt, where traditional life continues to a certain extent compared to other big cities, crafts and craftsmen cannot compete with the industrial and commercial power of modern times and are about to disappear. The situation revealed by this result does not only mean the disappearance of some crafts. It is seen that a wide-ranging traditional knowledge of the craftsmen who carry out this craft, from learning the profession to its execution, from selling to the public to the professional law among tradesmen, has begun to disappear without being transmitted to future generations. The disappearance of professional knowledge, which is one of the important corners of the national culture and accepted by UNESCO in the intangible cultural heritage list within the framework of various conventions, also shows that we are facing with great problems in the transmission of our intangible cultural heritage to the future generations in our country in general and in Bayburt in particular. Today, the products that are the concrete output of the crafts are taken under protection by amateurs, museums and various institutions in our country, even if they are disconnected from their context; however, it is not enough to keep only materials in order to keep the cultural value of these crafts alive. The materials must be kept alive with the context of the production process. Only in this way can the cultural codes in the professional knowledge be transmitted to the future generations and brought to the world cultural heritage. The point of the study is that if it is late in the province of Bayburt, this intangible cultural heritage will become extinct together with the craftsmen who are the last representatives of their profession. In this regard, it was remarked that this process can be reversed with the projects in which the official institutions, the experts employed at the universities and the Turkish National Commission for UNESCO are partnered together in terms of cities.

  • BildiriYalnız künye2013
    TECHNOLOGY SUPPORTING THE EVOLUTION OF SPATIAL THINKING: A CASE STUDY WITH PRE-SERVICE TEACHERS

    Karadag, Zekeriya

    Pre-service teachers, taking a method course to teach mathematics at elementary classroom, were exposed to explore various activities by using soma cubes. The research explores the participants' evolving ability of spatial visualization, which was very low at the beginning. They were struggling while drawing or constructing even very basic constructions. However, the improvements were accelerated as they integrated technological tools, StarBoard and SketchUp because of the flexibility and usability provided by these tools. The main corpus of data consists of participant own reflections on the pros and cons of integrating technology and how technology affected their visualization and spatial reasoning.

  • MakaleYayıncıda açık erişim2026
    Asymmetric Nexus Between Gold and Bitcoin: New Evidence from Hidden Cointegration Approach

    Yildiz, Umit

    The main objective of this study is to investigate the symmetric and asymmetric linkages between gold, a traditional investment instrument, and Bitcoin, often referred to as the digital gold of cryptocurrencies, and to determine their direction and magnitude. Forthis purpose, the study examines cointegration relationships amongthe variables using weekly data from January 2, 2022, to April 5, 2026. According to the Engle & Granger (1987) cointegration test, there is no long-term relationship between the variables. However, the Granger &Yoon (2002) hidden cointegration test determined hidden cointegration relationships from the gold's positive components to the Bitcoin's positive components and from the Bitcoin's positive components to the gold's negative components. Subsequently, longterm coefficients are estimated using FMOLS, DOLS, and CCR estimators. The results show that a 1% increase in gold's positive shocks leads to approximately a 0.92%-0.95% decrease in Bitcoin's positive shocks. A 1% increase in Bitcoin's positive shocks results in approximately a 0.08%-0.10% increase in gold's negative shocks. The estimation results show that increases in gold prices significantly constrain the rise in Bitcoin prices, but the impact of Bitcoin price increases on gold price decreases remains limited. Finally, the findings demonstrate that gold's market-making capacity as a traditional investment vehicle is stronger than that of modern financial investment vehicles.

  • MakaleAçık Erişim2020
    The Relationship Between Exercise and Body Composition and Liver Enzymes

    Temur, H. Bayram; Ceylan, Ramazan

    Zumba exercise program applied for twelve weeks to know its effects on Body Mass Index (BMI), Body weight, High Density Lipoprotein (HDL), Low Density Lipoprotein (LDL), Triglyceride (TG) and Aspartate Aminotransferase (AST). A total of 15 women, whose average age was 40.33 +/- 9.15 years, were trained for one and a half hours for 3 days a week for 12 weeks. The blood samples were taken on an empty stomach four times before the training of Zumba and at the end of each week. Blood samples were taken 24 hours after exercise at the end of every four weeks. These blood samples were studied in a healthcare facility laboratory. The lengths and body weights of the participants were also determined. We found that there was a decrease in body weight and BMI measurement values and AST measurement values. However, no significant change in serum HDL, LDL and triglyceride values was evidenced.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfOpenAlex1
    Web of Scienceİncele
  • MakaleYalnız künye2020
    ON THE UNCOMPLIED WORDS IN DERLEME SOZLUGU

    Güzel, Ferdi

    Derleme Sozlugu is the most comprehensive and the most important work in the field of Turkey Turkish dialects vocabulary. But when it comes to lexicography principles, there are some mistakes in this important study. It is among the important mistakes that some words without real local dialect data are included. In the Derleme Sozlugu, there are two kinds of words that are not actual dialect data, words taken from written sources and derived words. Some compilers sent the words they obtained from written sources and the words they derived from them as compiled words. Since it could not be determined by those who prepared the Derleme Sozlugu, a number of words entered into the Derleme Sozlugu that did not have local dialect data. Some studies have mentioned that there are some words taken from the written sources in the Derleme Sozlugu. The derived / fabricated words will be discussed for the first time in this study. It is a must to reorganize the Derleme Sozlugu which is the most important work in the field of dialect research. The Derleme Sozlugu which is reorganized and enriched with new compiled materials will be a better dictionary in terms of both reliability and usability.

  • MakaleAçık Erişim2021
    Clustering framework to cope with COVID-19 for cities in Turkey

    Guleryuz, Didem; Ozden, Erdemalp

    Introduction: This article is the product of the research Clustering Framework to Cope with COVID-19 for Cities in Turkey, developed at Bayburt University in 2021. Problem: Turkey's risk map, presented in January 2021, to take local decisions in tackling the COVID-19 pandemic, was based on confirmed cases only. Health, socio-economic and environmental indicators are also important for management decisions of COVID-19. The risk map to be designed by adding these indicators will support more effective decisions. Objective: The research aims to propose a clustering scheme to design a risk map of cities for Turkey. Methodology: The unsupervised clustering algorithm suggested dividing the cities of Turkey into clusters, considering health, socio-economic, environmental indicators, and the spread pattern of COVID-19. Results: We found that cities are clustered into five groups while megacity Istanbul alone formed a cluster, three of Turkey's largest cities formed another cluster. Other clusters consist of 19, 26, and 32 cities, respectively. The most important determinants which have predictive power are identified. Conclusion: The suggested clustering method can be a decision support system for policymakers to determine the differences and similarities of cities in quarantine decisions and normalization phases for the following periods of the pandemic. Originality: To the best of our knowledge, this study differs from previous studies because countries were grouped in previous studies by only considering the confirmed cases. In this study, cities were clustered in terms of the health, socio-economic, and environmental indicators to make decisions locally. Limitations: The distribution of confirmed cases by age could be added, especially to make decisions about education, but this data is not officially announced.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 11 · Sürdürülebilir Şehirler ve Topluluklar
    AtıfWoS1OpenAlex1
    Web of Scienceİncele
  • MakaleAçık Erişim2025Scopus SJRQ1
    The Effects of Artificial Intelligence Supported Flipped Classroom Applications on Learning Experience, Perception, and Artificial Intelligence Literacy in Higher Education

    Yavuz, Mehmet; Balat, Sener; Kayali, Bunyami

    Rapid changes in the field of technology have greatly affected learning and teaching styles as in every field. Artificial intelligence (AI), which is increasingly used in the field of education for different purposes such as improving learning outcomes or solving teaching problems, is one of the important technologies that contribute to this change. It is thought that there is a need for applications based on AI technology that can meet these needs in terms of sustainability of learning, especially in ODE environments where individual learning and instant feedback are important. Accordingly, the study aims to determine the impact of AI-supported flipped classroom applications on students' AI literacy and to evaluate their experiences and perceptions towards these applications. Explanatory sequential mixed design was used as the method in the study. In this context, in the quantitative phase of the study, a one-group pretest-posttest design from the weak experimental design was used to determine students' perceptions of flipped learning and AI literacy levels. In the qualitative phase of the study, a case study was used to determine students' views on learning experiences. The sample comprised 33 university students enrolled in a Web Design and Coding associate degree program. Data were collected through a flipped learning perception scale, an AI literacy scale, and semi-structured interviews. Quantitative findings revealed a statistically significant improvement in students' AI literacy levels from pre-test to post-test. Qualitative analyses indicated that AI-supported flipped classroom practices positively influenced students' motivation, interest in the course, and personalized learning experiences. Furthermore, the model fostered collaboration by promoting interactive learning environments and enhanced critical thinking and problem-solving skills. However, students also reported challenges related to managing their time effectively within this instructional model. The study concludes that AI-supported flipped classroom applications hold promise for improving AI literacy and fostering active, student-centered learning in higher education. Nevertheless, challenges such as time management warrant further attention. It is recommended that future research explore the implementation of this model across diverse courses and educational contexts, investigate strategies to mitigate time management issues, and conduct comparative studies between AI-supported and traditional flipped classroom models to further elucidate the sources of observed positive perceptions.

    • SDG 4 · Nitelikli Eğitim
    AtıfWoS12OpenAlex15
    Web of Scienceİncele
  • MakaleYalnız künye2011Scopus SJRQ2
    Statistical Downscaling of Monthly Precipitation Using NCEP/NCAR Reanalysis Data for Tahtali River Basin in Turkey

    Fistikoglu, Okan; Okkan, Umut

    Statistical downscaling methods describe a statistical relationship between large-scale atmospheric variables such as temperature, humidity, precipitation, etc., and local-scale meteorological variables like precipitation. This study examines the potential predictor variables selected from the National Center for Environmental Prediction and National Center for Atmospheric Research (NCEP/NCAR) reanalysis data set for downscaling monthly precipitation in Tahtali watershed in Turkey. An approach based on the assessment of all possible regression types was used to select the predictors among the NCEP reanalysis data set, and artificial neural network (ANN)-based downscaling models were designed separately for each station in the basin. The results of the study showed that precipitation, surface and sea level pressures, air temperatures at surface, 850-, 500-, and 200-hPa pressure levels, and geopotential heights at 850- and 200-hPa pressure levels are the most explanatory NCEP/NCAR parameters for the study area. It was concluded that ANN-based downscaling models can be implemented to downscale coarse-scale atmospheric parameters to monthly precipitation at station scale by using the above parameters as inputs in the study area.

    • SDG 6 · Temiz Su ve Sanitasyon
    • SDG 13 · İklim Eylemi
    AtıfWoS65OpenAlex86
    Web of Scienceİncele
  • MakaleAçık Erişim2025Scopus SJRQ4
    EXAMINATION OF FOLK BELIEFS IN YOMRA DISTRICT ACCORDING TO FUNCTIONAL THEORY

    Kabak, Turgay

    When looking at studies on folk beliefs in Turkey, we generally find two types of publications. The majority of research focus on revealing the origins of folk beliefs, I which identified through fieldwork, in old Turkish religion and mythology, and I establishing connections between the past and the present. The studies in the second group involve analyses of folk beliefs collected from one region of Turkey with those from other regions, or with folk beliefs from different regions of the Turkic world using a comparative method. There are scarcely any studies that address the functional dimension of folk beliefs and examine them from this perspective. The existing studies are quite narrow in scope. There is no study that extensively examines folk beliefs collected from a specific region according to the functional theory, as done in this study, which is one of the context-centered theories used by many researchers in the field of folklore. In this study, folk beliefs obtained through the field collection method from the district of Yomra, located in the Trabzon province of the Eastern Black Sea I region of Turkey, were analyzed according to functional theory. As a result of the I examination conducted, it has been found that the folk beliefs in the region have eleven functions which are: helping to protect public health, assisting public veterinary, protecting from evil spirits and beings, ensuring abundance and prosperity and protecting from famine, bringing good luck and averting bad luck, predicting and directing natural phenomena, transferring intangible cultural heritage, helping to make prophecy, establishing a connection with sacred, reconciling the old and the new, and securing social unity. Thus, the folk beliefs of a region have been examined for the first time with a holistic approach, from a functional perspective, and a model is developed that can be applied to other regions as well as folk beliefs will remain.

  • MakaleAçık Erişim2023
    LRIG1 levels in chronic rhinosinusitis with nasal polyps

    Uzunçakmak, Sevgi Karabulut; Sahin, Abdulkadir; Özçelik, Aysegul Tavaci; Halici, Zekai

    Purpose: Nasal polyps (NPs), usually occurring together with chronic rhinosinusitis (CRS), are benign masses of mucosal origin arising from inflammation. The transmembrane protein known as leucine-rich repeats and immunoglobulin-like domains 1 (Lrig1) is a member of the Lrig family. Lrig1 is frequently expressed in the respiratory tract and epithelial tissues and can inhibit several signaling pathways involved in cell proliferation. The aim of this study was to determine Lrig1 levels in NP tissues of patients with CRS. Material and Methods: This study included 36 patients with CRS and NPs and 15 patients who underwent rhinoplasty as the control group. The Lrig1 levels of all participants were measured by the ELISA method.Results: This study revealed that Lrig1 levels were significantly lower in NP tissues than in tissues of the control group. The mean level of Lrig1 of the NP tissues was 22.2 ng/ml, while the mean level of the control group was 28.5 ng/ml. According to the results of ROC analysis, Lrig1 levels have the power to distinguish polyp tissues from control tissues (AUC=0.794). Lrig1 levels were higher in tissues with scores of 4-8 than in tissues with scores of 16-20 based on the results of computed tomography scoring. According to endoscopic evaluations, Lrig1 levels of tissues with scores of 5-8 or 9-11 were relatively lower than those of tissues with scores of 2-4.Conclusion: Lrig1 levels were found to be decreased in NP tissues. Thus, Lrig1 may be used to confirm the presence of NPs. Lrig1 may also be helpful in NP grading. Increasing the Lrig1 levels in cases of NPs has the potential to become a targetable treatment modality.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfWoS1OpenAlex1TR Dizin1
    Web of ScienceTR Dizinİncele
  • MakaleAçık Erişim2022Scopus SJRQ3
    Turkey's Long-Term Electricity Consumption Forecast

    Emec, S.; Akkaya, G.

    Demand forecasting is essential primarily for planning. Although it is crucial in many sectors and issues, it has particular importance for electricity. Therefore, the issue of electricity consumption forecasting has recently become a prevalent topic. In light of the above, this study aimed to develop an appropriate model to estimate the long-term electricity consumption of Turkey. The study consists of three steps. In the first step, eight models were developed to separately investigate the effects of eight input variables frequently used in electricity consumption forecasting studies in the literature. In the second step of the study, two models consisting of input variables with high impact in the first step were developed, and the trained performances of the developed models were calculated by using the regression analysis. In the final step, the combined effect of eight variables on electricity consumption forecasting was investigated using regression analysis. It can be conclude that the model in the third step showed significant results, and the model performance was good. Finally, Turkey's electricity consumption forecast for the years 2020-2030 was performed using the model in the third step.

    • SDG 7 · Erişilebilir ve Temiz Enerji
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 13 · İklim Eylemi
    AtıfWoS1OpenAlex3
    Web of Scienceİncele
  • Derleme MakaleAçık Erişim2023
    THE EVOLUTION OF CUSTOMER CITIZIENSHIP BEHAVIOR RESEARCH: SYSTEMATIC REVIEW AND BIBLIOMETRIC ANALYSIS

    Sunaoglu, Serife Kazanci; Özdemir, Neslisah

    Customer citizenship behavior has been a remarkable concept in recent years, particularly in service research, due to the numerous benefits it provides from both the customer and the company's perspectives. This study aims to give a comprehensive view utilizing bibliometric methodologies and to provide a systematic evaluation of the growing literature on customer citizenship behavior. In this vein, a systematic review was conducted by applying content and bibliometric analysis to 151 emprical research articles in the Scopus database. The findings are discussed under the headings of descriptive overview and bibliometric mapping (year, author, country, journal, citation, keyword), theoretical background, studies used in measurement, methodological approaches (research design, data collection method, population, sample size, sampling method, analysis, industry) and related variables (antecedents, consequences, mediators and moderators). This study contributes to the body of knowledge by clarifying the literature on customer citizenship behavior, presenting the current situation, identifying gaps, and making recommendations for future research.

    • SDG 16 · Barış, Adalet ve Güçlü Kurumlar
  • MakaleAçık Erişim2020
    The Perceived Stress Levels During COVID-19 Quarantine Periods and Physical Activity and Exercise

    Sahin, Tolga; Gönen, Mevlut

    Social life disruption diminished the physical activity and isolation at home caused psychological stress on people during the coronavirus outbreak. This study applied the Perceived Stress Scale (PSS). Five hundred forty-three participants voluntarily completed the online questionnaire. The additional questions were asked to participants such as age, gender, educational status, spent time for physical activity or exercise, and isolation status. The perceived stress level and Insufficient Self-Efficacy perception (ISE) as a sub-factor of PSS were found statistically significant among the activity level groups. When compared to isolation status, the not isolated group showed a higher perception of stress (PSS total score, ISE, and SDP values) than partial and isolated groups except for SDP in partial isolated groups value. The findings of this study revealed that during isolation days which limiting energy expenditure and increasing mentally stress exercise and physical activity could be effective in decreasing perceived stress.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfOpenAlex6
    Web of Scienceİncele
  • MakaleYalnız künye2017Scopus SJRQ3
    EFFECTS OF AMBIENT CONDITIONS ON PERFORMANCE OF GAS TURBINE COGENERATION CYCLES

    Karaali, Rabi; Öztürk, Ilhan Tekin

    In this paper, effects of the ambient conditions on performance of cogeneration cycles are analyzed by Using exergy analysis method. These cogeneration cycles are the simple cycle, the air preheating cycle, the air-fuel preheating cycle and the inlet air cooling cycle. Also; these cycles are evaluated thermodynamically for different air and fuel mass ratio and the performance of these cycles are compared. The electrical power generation increases about 10-15 % by decreasing the inlet air temperature of the compressor from 25 degrees C to 0 degrees C. However, the thermal power decreases about 10 % with decreasing inlet air temperature. During the summer, the electric power can be easilyincreased 2-7 % by injecting water into the inlet air of the compressor. The exergetic efficiency of cycles is decreased 11-13 %; by decreasing the compressor inlet air pressure from 101.3 kPa to 70.18 kPa. But this change decreases the electric power generation about 25 %. The highest exergy efficiency is obtained for the air-fuel preheated cycle. The simple cycle is the best among the four cycles to obtain high heat rate and heat exergy. The effects of all ambient conditions on these cycles are considered simultaneously, analyzed and compared With each other in this study.

    AtıfWoS3
    Web of Scienceİncele