Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Yıldırım, Serkan(2)
- Altun, Hikmet(1)
- Dertli, Enes(1)
- Durna, İdris(1)
- Ermis, Ertan(1)
- Kaban, Abdullatif(1)
- Kara, Abdulkadir(1)
- Kökhan, Serhan(1)
- Poyraz, Ecem(1)
- Tanrıverdi, Aslıhan Aycan(1)
- Tanrıverdi, Erdi Anıl(1)
- Teber, Ahmet(1)
- Yilmaz, Mustafa Tahsin(1)
- Yıldıko, Ümit(1)
- Yıldırım, Gürkan(1)
- Çatar, Recep(1)
- Çelik, Embiya(1)
- Özdemir, Mustafa(1)
Yayınlar
- MakaleYalnız künye2026Scopus SJRQ4Evaluating Large Language Models in Turkish Short Answer Scoring: Validity, Reliability, and Fairness Perspectives
Kara, Abdulkadir; Yıldırım, Serkan
This study examines the performance of large language models (LLMs) in Turkish short-answer assessments within the measurement and evaluation theory framework. The GPT, Gemini, Gemma, and LLaMA models were evaluated under zero-shot and one-shot conditions with rubric support. The results show that LLMs have high self-consistency, but decision reliability can vary depending on prompt format and example sensitivity. Formulating rubrics with clear and concrete performance indicators increases model-human alignment and assessment fairness. Furthermore, error analyses revealed that while models often exhibit systematic low-scoring tendencies, they also display an ‘inverted-U’ error pattern, showing higher reliability at score extremes but struggling significantly with evaluating partial knowledge (intermediate scores). The results indicate that LLMs can support teachers in formative assessment when properly structured rubrics are used, but ethical oversight and pedagogical responsibility remain indispensable in final decisions.
- MakaleAçık Erişim2025Scopus SJRQ4DFT Calculations, ADME Analysis and Molecular Docking Studies of the Compound AHTPO With the Digestive Enzyme Trypsin Found in Cold-Adapted Fish Species
Tanrıverdi, Erdi Anıl; Tanrıverdi, Aslıhan Aycan; Yıldıko, Ümit
For the special amine 7-Amino-3-(4-aminophenyl)-5H-thiazolo[3,2-a]pyrimidin-5-one (AHTPO), previously reported experimental biological activities served as the foundation for further studies. Computational chemistry and molecular simulation techniques were subsequently applied to investigate AHTPO. Its interactions with trypsin enzymes derived from cold-adapted fish species were examined. The compound's biological activity and pharmacokinetic properties were assessed using DFT calculations, molecular docking, and ADME analyses. Molecular docking results indicated that AHTPO exhibits strong binding affinities with the 1A0J and 2TBS enzymes, with the binding to 2TBS being energetically more favorable. Additionally, ADME analysis revealed that while the AHTPO shows potential for pharmaceutical applications, its gastrointestinal absorption and blood-brain barrier permeability may present certain limitations. Regarding its electronic and optical properties, AHTPO's high dipole moment and polarizability values enhance its flexibility and adaptability in biological environments. The HOMO-LUMO energy gap suggests that the AHTPO achieves a balance between stability and reactivity, enabling high activity in biomolecular interactions. These findings highlight the promising pharmacological potential of AHTPO in binding with trypsin enzymes, suggesting its viability as a therapeutic agent.
AtıfScopus1OpenAlex1
İncele - MakaleAçık Erişim2025Scopus SJRQ4Effect of Plasma Electrolytic Oxidation Process on Corrosion Resistance of Al-Coated AZ61 Magnesium Alloy
Durna, İdris; Çatar, Recep; Altun, Hikmet
Magnesium alloys are extensively utilized in aerospace, aviation, and automotive sectors due to their low density and high specific strength, which offer significant advantages for lightweight structural applications. Their low density especially directs the attention of the aviation sector, where lightness is necessary, to these alloys. However, one of the disadvantages that restricts their use in the industry is their low corrosion resistance. In this study, the Plasma Electrolytic Oxidation (PEO) process was applied in a silicate-based electrolyte to AZ61 magnesium alloy pre-coated with aluminum using the electric arc spraying technique. To examine the characteristics of the fabricated coatings, their phase structures, surface features, and elemental compositions were investigated through XRD, SEM, and EDS analyses. Corrosion performances of coatings were investigated by potentiodynamic polarization test in 3.5% NaCl solution. As a result of electrochemical tests, corrosion current density values for the base sample (AZ61) and PEO coating (AZ61-PEO) were determined as 36,29 μA. cm−2 and 6,53 μA. cm−2, respectively. The findings highlight that the Al₂O₃ layer formed following PEO treatment significantly enhanced the corrosion resistance compared to the base sample.
- MakaleAçık Erişim2023Analysis of occupational health and safety risks in beekeeping with fmea method
Özdemir, Mustafa; Kökhan, Serhan
Contrary to popular belief, beekeeping, which dates back to prehistoric times and is one of the most important plant and animal production branches today, is not an innocent profession in terms of occupational health and safety. In this study, in order to determine the occupational health and safety risk factors in the beekeeping profession, Interviews with beekeepers were conducted in 10 apiaries operating in Bayburt, where especially wandering beekeeping is practiced. In light of the data obtained from the danger hunt applied by the occupational health and safety specialist, ergonomic, physical, biological, and chemical risks were revealed using the FMEA risk analysis method. The effect, probability, and detection values were found for each failure mode, and then Risk Priority Number values were calculated. As a result of the study, for the five basic stages of beekeeping, 15 processes, 39 failure modes, 72 potential effects, and 39 failure causes were determined. Failure modes with a Risk Priority Number value of 100 and above were evaluated as “situations where urgent action and axiom should be taken,” and preventive axioms were proposed for each relevant failure mode. The number of studies on the risk factors in the beekeeping profession is very limited in the literature. For this reason, it is predicted that this study will fill an important gap in the related field and make significant contributions to the literature.
AtıfScopus3OpenAlex3
İncele - MakaleAçık Erişim2020Optimization of exopolysaccharide production of Lactobacillus brevis E25 using RSM and characterization
Ermis, Ertan; Poyraz, Ecem; Dertli, Enes; Yilmaz, Mustafa Tahsin
Response surface methodology was used to determine the exopolysaccharide production of Lactobacillus brevis E25. The effects of three variables, temperature (30, 36 and 42 °C), incubation time (18, 33 and 48 h) and initial pH of growth medium (4.5, 5.5, and 6.5) were studied. Under optimum growth conditions, the amount of exopolysaccharide derived from Lactobacillus brevis E25 ranged from 10 to 35 gL-1. The size of EPS molecules ranged from 105 to 107 Da. Infra red spectrum analysis showed characteristics absorption peaks indicating the presence of-OH, C=O and C-H groups. Furthermore, only glucose was detected as monosaccharide in exopolysaccharide structure, revealing that the structure of exopolysaccharide is a homopolymeric glucan type. Based on the differential scanning calorimeter thermograms, exopolysaccharide’s melting temperature was observed around 116 °C.
AtıfScopus18OpenAlex18İncele - MakaleAçık Erişim2020Investigation of Beam Width Shaping of a Ku-band Horn Antenna using a Diffractive Optic Element and an Electromagnetic Wave Absorber
Teber, Ahmet
The feasibility of beam-shaping of a Ku-Band horn as a transmitting (Tx) antenna by mounting two different versions of lenses which are kind of Fresnel Zone Plates (FZP) is studied. The designed and fabricated geometrical structures offer a simpler approach building Fresnel Zone Plates by using an electromagnetic wave absorber and diffractive optic material. The diffractive optic material, paraffin, forms a set of alternating open and opaque annular zones on a flat surface, based on the design principles of Fresnel Zone Plates. An electromagnetic wave absorber covers the top surface of the formed paraffin, but not including the grooves. Thereafter, the Fresnel Zone plates are suitably attached in front of the transmitter horn antenna, located in the far-field region of a receiving antenna. The half-power beam-widths for the horn antenna (unloaded) and with two types of lenses are investigated. The results indicate that Fresnel zone plate structures can play a role suppressing side lobes in H-plane so that the effective radiation is to be significantly concentrated.
AtıfScopus1OpenAlex2İncele - MakaleYalnız künye2016Scopus SJRQ3The effect of digital badges specialization level of the subject on the achievement, satisfaction and motivation levels of the students
Yıldırım, Serkan; Kaban, Abdullatif; Yıldırım, Gürkan; Çelik, Embiya
Digital badges are the components demonstrating competency and knowledge of the learners. The use of digital badges used to reflect the skills of learners is becoming increasingly widespread in the teaching environments. In addition, these badges are starting to take their places among documents such as certificates and diplomas. In this study, the relationship between digital badges rated in accordance with specialization levels of the same subject and achievement, satisfaction and motivation levels of the students has been investigated. In addition, the relationship between learning styles of the students participating in the study and their academic achievement and satisfaction levels were also presented. In this study, in which proximal parallel pattern of mixed research methods was used, quantitative and qualitative data were reviewed together. The sample of study consists of junior students of Ataturk University, Kazım Karabekir Education Faculty. 13-week study was conducted with a total of 51 participants including 26 female and 25 male students. The data of the study were obtained by academic achievement form, Kolb's learning style inventory III and semi-structured interview form. According to the results of study, it has been seen that digital badges improve academic achievement, students' motivation to learn, attendance to lesson and satisfaction of the students. They also motivate students to make them ready for class, show level of the learners, provide the possibility of self and peer-assessment and they can be also used to demonstrate the level of competence and achievement along with some other documents such as diploma or certificate. As a result, digital badges can be used to better organize the learning process and make students more active learners.
AtıfScopus10İncele - DergiTurkish Online Journal of Educational Technology
- DergiSakarya University Journal of Science
- DergiSakarya University Journal of Computer and Information Sciences