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- MakaleAçık Erişim2022Scopus SJRQ3DETERMINATION OF PARAMETERS AFFECTING KINETIC AND THERMODYNAMIC VALUES FOR LEAD REMOVAL USING WASTEWATER TREATMENT PLANT SEWAGE SLUDGE ASH
Irdemez, Sahset; Yesilyurt, Duygu; Torun, Fatma Ekmekyapar; Kul, Sinan
In this study, treatment of lead containing wastewater using sewage sludge ash obtained from the incineration unit in the domestic wastewater treatment plant in Gaziantep province in Turkey was investigated. The main purpose of the study is to determine the potential of using the treatment sludge ash, which comes out as waste in the treatment plant, in the treatment of wastewater of another industry. As a result of this study, the most suitable adsorption conditions were determined and focused on the kinetics of adsorption. In the experiments, the lead adsorption capacity of sewage sludge ash was determined as 122 mg g-1 at 0.5 g L-1 adsorbent concentration in wastewater containing 100 mg L-1 Pb2+under optimum conditions. As a result of the research, it was determined that the adsorption reaction proceeds according to the pseudo second degree reaction and is suitable for the Langmuir isotherm. As thermodynamic constants, & UDelta;H & DEG; = 7.407 kJ mol-1 and & UDelta;S & DEG; = 33.25 J mol-1 were determined. As a result of this, it was determined that the adsorption reaction was endothermic, spontaneous and random, and adsorption was physical adsorption. The results show that sewage sludge ash can be used in the treatment of water containing high concentrations of Pb2+.
AtıfWoS3OpenAlex4
İncele - BildiriYalnız künye2012Comparison and Analyzing Propagation Models
Tabakcioglu, Mehmet Baris; Ayberkin, Doruk; Cansiz, Ahmet
This paper presents a study on a class of algorithms based on Uniform Theory of Diffraction (UTD) for multiple diffractions. S-UTD-CH model can be used for fast and more accurate field prediction for multiple diffractions in transition zone. An extensive simulation results for comparison of UTD based algorithms with respect to the computation time and accuracy was provided.
AtıfWoS2İncele - BildiriAçık Erişim2015Scopus SJRQ1Antiproliferative effects of Evernic acid on A549 and healthy human cells: An in vitro study
Kizil, Hamit Emre; Agar, Guleray; Anar, Mustafa
AtıfWoS3OpenAlex4İncele - MakaleYalnız künye2019Investigation of Speech Anxiety Levels of Physical Education and Sports Department Students in Terms of Different Variables
Ucan, Izzet; Ozan, Murat
The aim of this study is to determine the speech anxiety levels of physical education and sports department students and to examine them in terms of different variables. The research was carried out with 202 students (66 female and 136 male) studying in different departments of Erzurum Ataturk University Faculty of Sports Sciences in 2108/2019 academic year. The data related to the study were collected by Speech Anxiety Scale developed by Yaman and Sofu (2013) and the Demographic Information Form determined by the researchers. Frequency distribution was used to determine the students' demographic characteristics, Independent Samples T-test was used to examine the differentiation between two independent variables and speech anxiety and One-Way ANOVA analysis was used to examine the differentiation between more than two variables and speech anxiety. All these tests were analyzed in SPSS 21 package program and the significance level was accepted as p <0.05. As a result of the research, it was determined that there was no significant difference between the students' demographic characteristics, sporting activities and speech anxiety levels. Although there was no significant difference, it was also observed that the male students' total score of speech anxiety was lower than that of female students numerically. It was observed that, regarding the students' family structure variable, those who had a fragmented family, who had a monthly personal income level of over 1501 TL, who studied in the department of management, did sports activities and performed both sports as regards their sports activity type, had numerically a low level of speaking anxiety when compared to other variable groups. In the light of these results, it is suggested that students should be encouraged to participate in sports activities and to engage in different social activities in order to reduce their speech anxiety levels. Apart from this study, it is recommended to investigate using different variables and to determine the variables that may have a positive or negative effect on speech anxiety.
- MakaleAçık Erişim2023Investigation of the relationship between NFKB1 polymorphisms and telomere length and apoptosis in patients with type-2 diabetes
Dirican, Ebubekir; Kaya, Yasemin
Purpose: Type 2 diabetes mellitus (T2DM) is a heterogeneous, chronic, and metabolic disease that affects a significant proportion of the global population. This study aimed to evaluate the effect of NFKB1-94 ATTG ins/del polymorphisms on the expression of apoptosis genes and telomere length (TL) in patients with T2DM compared with healthy individuals.Materials and Methods: Sixty-nine T2DM patients and sixty healthy people were enrolled in the study. DNA and RNA were isolated from the blood samples. NFKB1 genotypes were identified by Sanger sequencing. For TL analyses and to investigate the expression of the caspase-3, caspase-9, bax, and bcl2 genes, RT-PCR was utilized.Results: There was a significant difference between the NFKB1-94 ins/del genotype patients and the control group (OR:0.4792 (0.2345-1.011)). However, the distribution of other genotype/alleles (ins/ins and del/del) showed no difference between T2DM and control groups. The allelic frequency of NFKB1-94 ins/del was 0.455/0.235 for the T2DM group and 0.435/0.165 for the control group. An increase in the mRNA expression of caspase-3, caspase-9 and Bax genes was observed in the T2DM group compared with the healthy group, while a decrease in the Bcl2 gene was found in the T2DM group. TL in T2DM patients was shorter than in healthy individuals.Conclusion: NFKB1-94 ins/del polymorphisms show significant differences in T2DM patients. We observed that apoptosis was activated and TL was shortened in patients with T2DM. However, no relationship between NFKB1 polymorphisms and apoptosis and TL could not be determined.
- BildiriÖn baskısı açık2016Medium Access Control Protocols for Wireless Sensor Networks with Ambient Energy
Kosunalp, Selahattin; Tabakcioglu, Mehmet Baris
Wireless sensor networks (WSNs) have recently been a popular research area with a broad range of applications. One of the most significant constraints of WSNs is energy limitation of sensor nodes. Therefore, energy-efficiency has been considered as primarily design criterion in many medium access control (MAC) protocols developed. In order to solve the issue of limited-energy sources, various recent protocols have focused on energy harvesting from surrounding environment, such as solar, wind and vibration energy, resulting in providing unlimited energy source. Ambient energy exhibits a characteristic of unlimited energy source but not available always due to environmental changes. The focus is now being placed on effective utilization of the time-varying ambient energy. This study aims to provide a review of recently proposed MAC protocols for energy-harvesting WSNs describing their operating principles and underlying features.
- BildiriAçık Erişim2015Scopus SJRQ1Determination of cytotoxic and proliferative effects of 2-amino-5-nitrobenzonitrile on AGS cancer cell line
Anar, Mustafa; Kizil, Hamit Emre; Agar, Guleray
- BildiriAçık Erişim2016A study on the development of an infographic designer questionnaire and designer opinions
Yildirim, Serkan; Yildirim, Gurkan; Çelik, Embiya; Kaban, Abdullatif
Technological developments and changes in how learning is understood have not only changed learning environments, but also how educational materials are developed. Infographics, one of the materials that are becoming increasingly more popular in learning environments, have nowadays become quite commonplace. Demonstrating the understanding of those who design such instructional materials is important with respect to the organisation of learning processes. In this study, we devised a questionnaire that aims to demonstrate the understanding infographic designers have of infographic design. A total of 94 students from the Department of Computer and Instructional Technologies Education of the Kazim Karabekir Faculty of Education took part in this study conducted during the fall semester of the 2013-2014 academic year. The participants were given a questionnaire consisting of 41 items that enquired about the readers' views regarding infographic design. The collected data were assessed using Principal Component Analysis. Based on the analysis results, a questionnaire form consisting of 27 items and 8 factors (Understanding of Design, Design Process, Copyrights, Introduction, Readability, Sharing, References, Development) was developed.
AtıfOpenAlex3İncele - BildiriAçık Erişim2016Scopus SJRQ1Determination of functional characteristics, presence of virulence factors and antibiotic resistance of enterococci isolated from Turkish White-Cheese
Akin, Nihat; Dertli, Enes; Ispirli, Humeyra; Yuvasen, Ayse; Akaya, Zuhal
- BildiriYalnız künye2020Scopus SJRQ2Storage Stability of Probiotic Weisella Cibaria N9 in Freeze-dried Form
Gul, Latife Betul; Gul, Osman; Dertli, Enes; Con, Ahmet Hilmi
AtıfWoS2İncele - MakaleAçık Erişim2019Self-Representation of the Romany Ethnicity in Social Media and Socio-Digital Compensation of the Otherness
Güzel Korver, Semra; Keskin, Savas
This study consists of a cultural analysis of social media usage as a platform for self-representation and socio-digital compensation of Roman users who are exposed to problems in terms of representation and recognition due to their position as a minority group in Turkey. The aim of the study, which examines the identity building of a group of Romany users organized on Facebook under the name of Romany Research Center, is to determine the functions, maneuvers and cultural aspects of the self-representation practices of the Romany ethnic identity under socio-digital conditions and to understand the ways in which digital building actions transform the relationship between identity and otherness in the context of Romany users. In the study, which focuses on representation of ethnicity and cultural identity, the netnography method, defined as social network ethnography, was used to analyze the cultural interfaces and shares on the page. Within the framework of the method, the shares on the community page were coded as cultural layers and identity generators, and a wide-ranging observation and document review process was undertaken. The cultural codes interpreted from a descriptive perspective show that the members who share the Romany identity think about the perception of being `We' together with the Turkish national identity and construct another identity known as Gaco (Non-Romany). The findings of the study reveal that the organization/composition of proving laundering and innocence is dominant instead of autonomous and positive constructs in the socio-digital construction process of the Romany ethnic identity. In this case, it may be argued that the community members continue to create an awareness of their problems by closing the information gap in a sense by freely displaying their positive identities that the media ignores.
AtıfWoS1OpenAlex4İncele - MakaleAçık Erişim2021Challenges and fundamental skills for primary school teachers: Developing self-efficacy beliefs scale
Sarikaya, Ismail; Sökmen, Yavuz
The study aims to shed light on the strengths of the primary school teaching profession and the fundamental skills that a primary school teacher (PST) should have while also taking into account the views of the PSTs. However, based on the data collected, the objective is to develop a self-efficacy belief scale (SEBS) for PSTs and teacher candidates. The first stage was carried out with 80 PSTs with at least five years of professional experience. 763 PSTs and PST candidates participated in second stage of the study. A SEBS was developed for PSTs and teacher candidates in light of the obtained data. Descriptive analysis and content analysis were used for qualitative data. The categories of being a teacher in village school, administration-colleague and parent-related problems, student self-care, pedagogical qualifications, and personal and professional development were attained concerning the challenges and fundamental skills for PSTs. Scale development steps were followed second stage of the study. The SEBS containing three sub-dimensions and 19 items is assumed to be helpful and valid and reliable metrics.
AtıfWoS1OpenAlex4TR Dizin3
İncele - MakaleAçık Erişim2025THE ROLE OF CAPITAL FLOWS IN THE INTERNATIONAL TRANSMISSION OF US MONETARY POLICY: THE CASE OF TURKEY
Akar, Nuri Cagri; Varlik, Cemil
This article aims to examine the impacts of US monetary policy (MP) changes on the Turkish economy. A Structural Vector Autoregressive (SVAR) model is estimated for the period 2002:01-2017:12, during which a flexible exchange rate regime was adopted in the Turkish economy. According to the impulse-response analysis, the Turkish interest rate responds positively and significantly to the US Effective Federal Funds Rate (EFFR). AThis result shows that the Central Bank of the Republic of Turkey's (CBRT) MP follows the FED's MP, consistent with the dilemma hypothesis of Rey (2015). The analysis also demonstrates that both the EFFR and the VIX have a negative impact on net total capital inflows to the Turkish economy. The impulse-responses for the three components of net capital inflows indicate important conclusions. Firstly, neither EFFR nor VIX has a significant impact on Net Foreign Direct Investment (NFDI) inflows. Secondly, Net Portfolio Investments (NPI) respond significantly to the VIX but not to the EFFR. Thirdly, Net Other Investments (NOI) respond significantly to the EFFR but not to the VIX. These findings indicate that the NOI component plays a direct and major role in the emergence of the US MP's spillover effects on the Turkish MP.
AtıfWoS1İncele - MakaleAçık Erişim2026Scopus SJRQ1Global Financial Architecture Under Geopolitical, Financial and Policy Pressures: A Capacity-Pressure Index of Financial Resilience
Kuzu, Mehmet; Kocaoglu, Fatih
Financial resilience depends on both prevailing pressures and the resources available to maintain financial functions. This study proposes a Global Financial Resilience Index (GFRI) that combines selected structural indicators with the inverse of geopolitical, policy, and market pressures. The formal retrospective sample covers January 2000-June 2026; July-August extensions are reported separately. Fixed-reference standardisation and geometric aggregation produce a transparent capacity-pressure composite, not a measure of environmental, social or intergenerational sustainability. Fixed-basket comparisons retain some capacity improvement, but a balanced five-indicator panel covers only 20 economies and 12.4-16.0% of global GDP. Country selection and calibration alter the pandemic-era ranking. The OECD growth-cycle mean difference is -8.30 points with HAC(12) p = 0.055. Classification AUC is 0.658, with a 12-month block-bootstrap 95% interval of 0.468-0.821, and does not improve on matched stress benchmarks. The incremental explanatory power of industrial production is negligible. Weight simulations and publication-lag tests reveal uncertainty in material construction. The index offers a reproducible description of selected capacity and pressure conditions; the evidence does not support operational policy bands, superior crisis prediction or comprehensive sustainability claims.
- MakaleAçık Erişim2014DETERMINATION OF THE WEAR FAULT IN SPUR GEAR SYSTEM USING STATISTICAL PROCESS CONTROL METHOD
Maras, Sinan; Arslan, Hakan
Vibration analysis is one of the early warning methods widely used in obtaining information about faults occurring on the machine elements and structures. In this method, gear fault detection can be performed by analyzing of the vibration test results using signal processing, artificial intelligence and statistical analysis methods. The objective of this study is detection the existence of wear by examining changes in the vibrations of spur gears due to wear faults in statistical process control carts. In this study, artificial wear was created on the surfaces of spur gears in order to be examined in gears test rig. Then, these gears were attached and vibrations data were recorded by operating the system at various loading and number of cycles conditions. Detection of fault was demonstrated by analyzing undeformed and worn gears data in statistical process control carts by means of real-time experimental studies.
AtıfWoS1OpenAlex2İncele - BildiriÖn baskısı açık2015Application of of Ray Tracing Technique into S-UTD-CH Model
Tabakcioglu, Mehmet Baris; Ayberkin, Doruk
To make higher accuracy predictions having less computation complexity, lower computation time, a lot of electromagnetic wave propagation models are developed. These models are classified into two classes, ray tracing based and numerical models. Computation complexity, computation time and accuracy of prediction of numerical model are high. On the contrary, computation complexity and computation time of ray tracing based model is lower. There is a tradeoff between computation time and accuracy. To predict the relative path loss at the receiver accurately, all ray paths have to be determined. In this study, after giving some brief information about some ray tracing based propagation models ray tracing software will be explained.
AtıfWoS1İncele - BildiriYalnız künye2015Scopus SJRQ3Removal of Reactive Black 5 from wastewater using natural clinoptilolite modified with apolaccase
Nadaroglu, Hayrunnisa; Kalkan, Ekrem; Celebi, Neslihan; Tasgin, Esen
In this study, a clinoptilolite modified with apolaccase was used to adsorb Reactive Black 5 (RB5) dye from aqueous solution using the batch procedure. The influences of pH, contact time, temperature and absorbent dosage on the adsorption were investigated. The optimum adsorption was obtained at pH = 6, contact time = 60 min, temperature = 25 degrees C and adsorbent dosages of 1.62 and 1.59 mg/50 mL per gram of clinoptilolite and of apolaccase-modified clinoptilolite (LMC), respectively). The adsorption experimental data fitted both the Langmuir and Freundlich isotherm models well. In addition, pseudo-first-order and pseudo-second-order kinetics were used to study the kinetics of RB5 dye adsorption onto natural clinoptilolite and LMC. Adsorption appears to follow pseudo-second-order kinetics with a high correlation coefficient. Thermodynamic parameters such as changes in the free energy (Delta G degrees), enthalpy (Delta H degrees) and entropy (Delta S degrees) of adsorption were calculated. The thermodynamic parameters indicate that the adsorption of RB5 dye onto LMC was less spontaneous, feasible and endothermic. The LMC can be used as an alternative low-cost adsorbent for the dye removal from aqueous solutions.
AtıfWoS8OpenAlex8İncele - MakaleAçık Erişim2020INVESTIGATION OF CONSUMERS 'ORGANIC FOOD PURCHASES IN THE CONTEXT OF THE RELATIONSHIP OF PERSONAL VALUES AND INDIVIDUAL FACTORS
Ercis, Aysel; Yildiz, Tugba; Deveci, F. Gorgun
In this study, it was aimed to determine the factors affecting consumers organic food purchase intention. In this direction; individual factors of personal values, attitude towards purchasing organic food of individual factors, and the effect of this variable on the organic food purchase intention was investigated. The role of moderator in the relationship between subjective norms' organic food purchasing attitude and organic food purchase intention is discussed. According to the results of the research, while personal values affect individual factors; while health and environmental consciousness have an impact on the attitude towards purchasing organic food, price consciousness has no effect. In addition, the findings show that the attitude towards purchasing organic food has an impact on the purchase intention. Finally, the subjective norm has a moderator effect between the organic food purchase intention and the attitude towards purchasing organic food.
AtıfWoS5OpenAlex5İncele - MakaleYalnız künye2021EFFECTS OF VERMICOMPOST FERTILIZER ON THE YIELD AND OIL QUALITY IN SUNFLOWER (Helianthus annuus L.) VARIETIES
Gul, Volkan; Gidik, Betul; Girgel, Umit
This study was carried out in 2018 on an experimental field of Bayburt University in order to demonstrate the effect of different doses of vermicompost on the yield and oil quality in oilseed sunflower varieties. The experiments were carried out in randomized full-block design with three replicates. In the experiments, it was found that administering 100 kg da(-1) of vermicompost to the sunflowers yielded the best results in terms of grain yield (130.81 kg da(-1)), fat ratio (48.21%). and fatty acids parameters (saturated fatty acid ratio 15.30%. unsaturated fatty acid ratio 84.71%). In conclusion, we are of the opinion that, although there is an insufficient number of studies on oil crops. with the help of similar future studies in which vermicompost and other organic fertilizers are compounded, a humanand environment-friendly organic production can be realized by increasing the yield as well as the quality.
AtıfWoS1İncele - Derleme MakaleYalnız künye2022The Journey of Customer Identification: A Systematic Literature Review and Directions for Further Investigation
Vardarsuyu, Merve; Sunaoglu, Serife Kazanci
Customer identification has been a key concept in understanding consumers' relationships with brands. In this review article, we aim to provide a comprehensive overview of extant knowledge on customer identification and offer suggestions for future development in line with the gaps identified in the prior literature. We systematically review 73 peer-reviewed journal articles pertinent to customer identification in the Scopus database. We discuss the review findings in five sections, namely, conceptualization, theoretical framework, descriptive information, methodological trends, and key variables. Drawing from the gaps in the existing literature, we propose several suggestions for future research and end the paper with concluding remarks.
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