Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Gul, Muhammet(110)
- Güler, Ömer(70)
- Akkurt, Nevzat(69)
- Serdar, Osman(57)
- Yucesan, Melih(55)
- Celik, Erkan(53)
- Tekin, H.O.(52)
- ALMisned, Ghada(49)
- Bulut, Hasan(49)
- Baskonus, Haci Mehmet(48)
- Paksoy, Mehmet Yavuz(46)
- Yildirim, Numan(45)
- Kocabaş, Mehmet(41)
- Yildirim, Nuran Cikcikoglu(41)
- Zengin, Gokhan(40)
- Alataş, Mevlüt(39)
- Ince, Muharrem(38)
- Benzer, Fulya(37)
- Mete, Suleyman(34)
- Aslan, Naim(33)
- Kutlu, Banu(33)
- Yildirim, Ozal(33)
- Topal, Murat(32)
- Tanyol, Mehtap(30)
- Batan, Nevzat(28)
- Özkul, İskender(28)
- Kök, Mediha(27)
- Utku, Anıl(27)
- Can, Erkan(26)
- Danabas, Durali(26)
- Sulaiman, Tukur Abdulkadir(26)
- Ates, Mehmet(25)
- Ezer, Tülay(25)
- Guler, Omer(25)
- Kutluyer, Filiz(25)
- Say, Yakup(25)
- Serin, Faruk(25)
- Erguven, Gokhan Onder(24)
- Onat, Onur(24)
- Cakilcioglu, Ugur(23)
Yayınlar
- MakaleAçık Erişim2026Scopus SJRQ1Evaluation of electrical properties of poly(NIPA-co-St) composites containing neodymium and yttrium
Cetinkaya, Ebru; Karaaslan Ayhan, Nagihan; Torgut, Gulben
In this study, firstly, to obtain neodymium (Nd) and yttrium (Y)-containing composite materials, poly(N-isopropylacrylamide-copolymer-styrene) (poly(NIPA-co-St)) copolymer was synthesized by free radical polymerization method using N-isopropylacrylamide (NIPA) and styrene (St) monomers. Secondly, new composite materials were obtained by adding neodymium and yttrium to this copolymer at different weight ratios (10% and 20%). Structural and morphological characterizations of poly(NIPA-co-St) copolymer, poly(NIPA-co-St)-10%Nd, poly(NIPA-co-St)-20%Nd, poly(NIPA-co-St)-10%Y and poly(NIPA-co-St)-20%Y composite materials were carried out. The electrical properties of the copolymer and composite materials were evaluated by considering the frequency dependence of the dielectric constant (έ), dielectric loss (ε″) and electrical conductivity (σac) properties. At 100 Hz, the έ, ε″, and σac values of the copolymer were 5.12, 0.05, and 2.29 × 10−10 S/cm, respectively. With the addition of 10% Nd, the έ, ε″, and σac values at 100 Hz were calculated as 6.57, 0.10, and 1.79 × 10−9 S/cm, respectively, while with the addition of 20% Nd, these values were calculated as 8.39, 0.15, and 4.78 × 10−8 S/cm at 100 Hz. With the addition of 10% Y, the έ, ε″, and σac values at 100 Hz were calculated as 6.56, 0.053, and 1.81 × 10−9 S/cm, respectively, while with the addition of 20% Y, these values were calculated as 8.57, 0.0058, and 3.70 × 10−8 S/cm at 100 Hz. It can be stated that as the amount of Nd and Y additives to the poly(NIPA-co-St) copolymer increases, the έ, ε″, and σac values increase, indicating an improvement in electrical properties with the addition of Nd and Y elements.
AtıfOpenAlex1
İncele - MakaleAçık Erişim2026Scopus SJRQ2Structural and optical properties of Bi- and Sn-doped Sb2Se3 thin films prepared by thermal evaporation
Kök, Mediha; Öztürk, Yunus; Sait Kanca, M.
In this study, Sb2Se3-based semiconductor thin films, both pure Sb2Se3 and those doped with Bi and Sn, were produced using the thermal evaporation method. The structural, morphological, and optical properties of the obtained films were investigated using XRD, SEM, and UV–Vis spectroscopy. While films without annealing exhibited an amorphous structure, significant crystallization was observed after annealing at 350 °C, especially at high doping levels. SEM analyses showed significant changes in surface morphology and grain structure depending on the doping level. Optical measurements revealed that absorption increased and the band gap changed with increasing doping level. The band gap for the undoped Sb2Se3 thin film was found to be 1.54 eV. An increase due to the Burstein–Moss effect was observed at low additive ratios, while band narrowing was observed at high additive ratios. The results obtained indicate that Bi and Sn additives improve the optoelectronic properties of Sb2Se3 thin films and hold potential for photovoltaic applications.
- MakaleAçık Erişim2026Scopus SJRQ1Freeze–Thaw Performance and Microstructural Stability of Alkali-Activated Slag Mortars Incorporating Mussel Shell Waste
Şahin Yön, Merve
This study investigates the use of mussel shells (MSs), a biogenic by-product of the food industry, as a partial replacement for ground granulated blast furnace slag (GBFS) in alkali-activated mortars. Given their high CaCO3 content, MSs represent a sustainable secondary raw material that reduces both waste disposal burden and reliance on natural resources, while offering a low-carbon alternative to conventional cement-based binders. Alkali-activated mussel shell/slag mortars (AAMSs) were produced with MS replacement ratios of 0%, 5%, 10%, 15%, and 20% by mass of GBFS. Sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) were used as alkaline activators. Fresh specimens were cured at 60 °C for 48 h. The experimental program included workability, compressive and flexural strength, water absorption, porosity, density, capillarity, ultrasonic pulse velocity (UPV), and freeze–thaw (F-T) resistance tests. Increasing MS content slightly reduced flowability and mechanical strength, while increasing water absorption, porosity, and capillarity. The M0 series achieved the highest 28-day compressive strength (54.06 MPa), while M15 exhibited the highest flexural strength (5.23 MPa). Following F-T cycling, the 5% and 10% MS series demonstrated the best compressive strength (30 MPa). The 10% MS exhibits a relatively balanced overall performance, providing the best balance between mechanical performance, F-T resistance, and microstructural stability, as confirmed by scanning electron microscopy (SEM)/energy-dispersive X-ray spectroscopy (EDS) analyses showing elevated Ca/Si ratios and the formation of Ca-rich crystalline phases.
- MakaleYalnız künye2026Scopus SJRQ1Determination of microplastic contamination and phthalate ester migration in canned and frozen packaged seafood: A probabilistic human health risk assessment via Monte Carlo simulation
Macit, Arife; Köktürk, Mine; Serdar, Osman; Alak, Gonca
This research was designed to identify the levels of microplastics (MP) and phthalate esters (PAE) in canned and frozen packaged fish and to assess the human health risks associated with these pollutants. Analyses were carried out on a total of 25 sample groups, including 10 different canned tuna samples, 9 different packaged seafood products, and 6 different packaging materials. Microplastics were characterized and polymer identification was performed using μ-Raman and ATR-FTIR spectroscopy, while PAEs were determined by GC–MS/MS. The obtained data were used to calculate estimated daily intake (EDI), hazard index (HI), hazard quotient (HQ), and cancer risk (CR), and uncertainty was assessed using Monte Carlo simulation. The findings revealed that both microplastic and phthalate exposure were higher in the frozen fish group than in canned products. The highest MP concentrations were recorded in packaged Whiting B (0.73 ± 0.25 items/g) and oil-added canned tuna (0.57 ± 0.15 items/g). Regarding PAEs, while DEHP and DBP were generally prominent, significant peak concentrations of BBP and DNOP were also identified, reaching 1.91 ± 0.01 ppm for BBP in canned tuna with sunflower oil and 1.84 ± 0.01 ppm in packaged whiting. Furthermore, higher exposure was observed in males for most PAEs. HQ and HI values were below 1 (maximum HI: 1.57 × 10−2 for males consuming frozen seafood), while CR values remained within an acceptable range (4.74 × 10−7 to 3.49 × 10−6). In conclusion, health risks related to processed fish consumption appear generally low; however, processing and packaging may contribute to contamination and warrant further investigation.
- MakaleYalnız künye2026Scopus SJRQ2Exploring Nuclear Radiation Shielding Capabilities of High-Entropy Carbides: A Study on Composition and Effectiveness
Yilmaz Alan, Hatice; Guler, Omer; Yilmaz, Ayberk; Susam, Lidya Amon; Kavaz, Esra; Kilic, Gokhan; Ilik, Erkan; Oktik, Sener; Akkus, Baki; ALMisned, Ghada
High-entropy carbides (HECs) are emerging as promising materials for shielding against gamma-ray and neutron radiation due to their unique structural and compositional properties. This study systematically evaluates the shielding capabilities of 12 carbide-reinforced high-entropy alloys (HEAs) composed of elements such as hafnium, niobium, titanium, zirconium, tungsten, tantalum, vanadium, and molybdenum. Various gamma-ray and neutron shielding parameters, including attenuation coefficients, shielding thicknesses, and neutron removal cross sections, were calculated using the Phy-X/PSD software. The findings reveal a strong correlation between material density and shielding efficiency, with the highest density samples, particularly (Zr0.2Hf0.2Ta0.2Mo0.2W0.2)C and (Ti0.2Hf0.2Nb0.2Ta0.2W0.2)C, demonstrating superior gamma-ray attenuation. Additionally, neutron shielding performance was maximized in compositions containing high concentrations of heavy elements, with (Ti0.2V0.2Nb0.2Ta0.2W0.2)C exhibiting the most effective neutron absorption properties. The interactions of photons and charged particles with these materials were further examined through mass stopping power and projected range calculations for alpha particles, protons, and electrons. It can be concluded that HEC-based alloys, due to their high density, optimized composition, and superior radiation attenuation properties, could be strong candidates for advanced shielding applications in nuclear and aerospace environments.
AtıfScopus2OpenAlex2İncele - MakaleAçık Erişim2026Scopus SJRQ2Green Chemistry Meets Advanced Materials: Synthesis and Adsorption Performance of Ti3CNTx MXenes for Basic Red 46 Dye Removal
Aydın, Ekrem; Çelik, Aytekin; Köse, Yusuf; Hasar, Halil
In this study, Ti₃CNTₓ MXene nanosheets were synthesized from Ti₃AlCNTₓ MAX phase via two selective Al-etching routes: (i) direct hydrofluoric acid (HF) treatment and (ii) in-situ HF generation using a LiF + HCl mixture. Both approaches were systematically compared to evaluate their effects on structural integrity, surface chemistry, and adsorption performance toward the cationic dye Basic Red 46 (BR 46). Comprehensive physicochemical characterizations—including SEM–EDX, XRD, XPS, Raman spectroscopy, AFM, contact angle analysis, and TGA—confirmed successful Al removal and MXene formation for both methods, with notable differences in surface terminations and layer morphology. Batch adsorption experiments were conducted across a wide range of pH values (2–11), temperatures (25–60 °C), contact times (0–90 min), adsorbent dosages (0.05–0.40 g), and initial dye concentrations (10–50 mg/L). The HF-etched Ti₃CNTₓ exhibited rapid adsorption, achieving 99.6% removal at pH 2 within 20 min, whereas the LiF + HCl-etched sample demonstrated superior performance at moderate-to-alkaline pH and maintained high efficiency at lower dosages. Langmuir isotherm fitting revealed maximum adsorption capacities of 19.24 mg/g (HF route) and 28.01 mg/g (LiF + HCl route), supporting monolayer adsorption on homogeneous sites. Temperature-dependent studies further indicated an endothermic and spontaneous adsorption mechanism. Overall, the LiF + HCl route offers a greener and safer alternative to conventional HF etching while delivering competitive adsorption performance, improved structural stability, and faster equilibrium. These findings highlight the potential of sustainably synthesized Ti₃CNTₓ MXenes as high-performance adsorbents for dye-laden industrial wastewater treatment.
AtıfScopus2WoS2OpenAlex1İncele - MakaleAçık Erişim2026Scopus SJRQ1“A combined experimental numerical statistical framework to characterize fracture behavior of asphalt mixtures”
Atar, Muhammed; Ince, Ragip; Bakhshizadeh, Majid; Pirmohammad, Sadjad; Furtana Yalcin, Beyza; Yilmaz, Mehmet
This study investigates the fracture and viscoelastic behavior of asphalt mixtures through a combined experimental, numerical, and statistical approach. Semi Circular Bend (SCB) tests were performed on specimens with notch lengths of 10, 20, and 30 mm at two temperature levels (0 °C and room temperature) to determine fracture toughness (KIc), fracture energy, and stiffness parameters. The Extended Finite Element Method (XFEM) was employed to simulate crack initiation and propagation, providing a close match with experimental SCB results under various thermal and geometric conditions. To further interpret the effects of temperature and crack geometry, the Response Surface Methodology (RSM) was applied to the experimental data, enabling the identification of key interaction effects and optimization of fracture parameters. The results demonstrated that decreasing temperature and increasing notch length notably reduced fracture resistance, while XFEM accurately represented the nonlinear crack propagation observed in laboratory testing. Moreover, RSM provided predictive equations that were in strong agreement with XFEM outcomes. The proposed integrated SCB-XFEM-RSM framework presents an efficient and reliable methodology for evaluating and optimizing the fracture performance of asphalt mixtures, offering valuable insights for the design of durable and sustainable pavement systems under diverse environmental conditions.
AtıfScopus3OpenAlex3İncele - Kitap BölümüYalnız künye2026THE “OTHER” KARAGÖZ: The Kurdish Qeregoz
Çelik, Duygu
The traditional Ottoman shadow play Karagöz and Hacivat was broadcast in Kurdish on a Turkish state channel broadcasting in 2012. In this chapter, the author poses the question: are these Kurdish scenarios mere translations of the Turkish form, or did Qeregoz develop into a localized form of its own? Ultimately, the author contends that these plays in Kurdish represent a new staging style of the iconic form, and furthermore, the generous depiction of Kurdish life in Qeregoz on television had the effect of troubling a monolithic sense of “Turkishness.”
- MakaleYalnız künye2026Scopus SJRQ3Sensitive Electrochemical Analysis of Gentamicin Sulfate in Eye Solution
Ekşi, Osman; İpek, Yeliz; Koçak, Berna
In this study, for the first time, chromium (III) oxide-glutardialdehyde modified boron-doped diamond electrode (Cr2O3-GA2/BDDE) was used as a sensor for the electrochemical analysis of gentamicin sulfate. The Cr2O3-GA2 suspension used in electrode modification was physically coated on the BDD electrode by a simple drop-casting method. Characterization of Cr2O3-GA2 used in the modification was made by scanning electron microscopy, energy-dispersive spectroscopy (SEM-EDS), and the electrochemical method. The behavior of gentamicin sulfate on Cr2O3-GA2/BDDE was studied by cyclic voltammetry (CV), and its electrochemical analysis was done by differential pulse voltammetry (DPV). Electrochemical analysis of gentamicin sulfate on Cr2O3-GA2/BDDE was carried out in a pH 9 Britton–Robinson (BR) buffer by the DPV method. The linear working range of gentamicin sulfate on Cr2O3-GA2/BDDE was calculated as 5.96 × 10−6−6.54 × 10−5mol L−1, and the correlation coefficient was calculated as 0.997. The limit of detection (LOD) was found to be 2.84 × 10−6. mol L−1. Additionally, Genta, a 3% eye/ear drop solution, was preferred to determine the applicability of gentamicin sulfate in a commercial formulation. As a result, it was shown that the method developed on Cr2O3-GA2/BDDE for the determination of gentamicin sulfate can be applied to commercial drugs.
- MakaleAçık Erişim2026Scopus SJRQ1Forked hybrid architecture combining 1D-CNN and quantum convolutional networks for EEG signal classification
Esmeray, Furkan; Gülten, Arif
Detecting epileptic seizures from electroencephalogram (EEG) signals presents a significant challenge due to the nonlinear and non-stationary nature of brain activity. In this study, we propose a hybrid classification framework that integrates quantum-assisted and classical deep learning techniques to enhance detection accuracy and model interpretability. First, discrete wavelet transform (DWT) is applied to extract multiscale time–frequency features from raw EEG signals. Subsequently, three comparative models are developed: a conventional 1D-CNN model, an IQCNN model incorporating a parametric quantum circuit, and a novel Forked Enhanced Model that processes EEG features simultaneously through both 1D-CNN and IQCNN branches and combines them in a fully connected layer. The proposed hybrid model leverages the expressive power of quantum entanglement while preserving the robustness of classical deep learning. Evaluations using 5-fold stratified cross-validation on a real EEG dataset show that the forked architecture outperforms both classical CNNs and quantum-only based models in terms of accuracy, F1 score, precision, recall, number of incorrectly classified subjects and AUC. In this study, the best result was obtained with the Denoise IQCNNNet hybrid model. The accuracy of this model is 97.25%, precision 92.74%, recall 93.66%, F-1 score 93.15%, AUC 99.54%, number of incorrectly classified subjects are 57. This study demonstrates the feasibility and potential of hybrid quantum-classical networks in biomedical signal processing and provides a foundation for real-time clinical seizure monitoring systems.
- EditoryalAçık Erişim2026Scopus SJRQ1Recirculating Foundational Problems: Four Decades of Educational Computing in the JECR Archive (1987–2024)
Aslan, Alper; Akti Aslan, Seda; Turgut, Yiğit Emrah; Allison, Jordan; Özyurt, Özcan
This editorial presents a structured synthesis of the thematic development of the Journal of Educational Computing Research (JECR) from 1987 to 2024, drawing on a computational analysis of 1,597 articles. Applying Latent Dirichlet Allocation (LDA), the analysis identifies thirteen thematic structures that reveal both the enduring commitments and the emerging orientations of the journal across nearly four decades. Themes such as problem-solving through programming and self-efficacy in programming education have constituted persistent research agendas since the journal’s earliest volumes, while computational thinking and game-based learning have gained substantial momentum since 2015. These patterns suggest that JECR’s intellectual identity is best understood not as a sequence of discrete topical shifts, but as a sustained process in which a bounded set of foundational problems is repeatedly re-articulated under changing technological and epistemic conditions. The editorial situates this trajectory in relation to contemporary developments in artificial intelligence and educational technology, arguing that the journal’s historical archive offers an indispensable conceptual framework for interpreting present-day transformations.
AtıfScopus1OpenAlex1İncele - MakaleAçık Erişim2026Scopus SJRQ4Impact of Basalt Powder on the Physical, Fresh, Hardened and Microstructural Characteristics of Granulated Blast Furnace Slag-Based Alkali-Activated Mortars
Yön, Merve Şahin; Cemalgil, Selim
In this study, the workability, mechanical and physical aspects of alkali-activated mortar (AAM) containing basalt powder (BP) and granulated blast furnace slag (GBFS) were investigated. For the experimental study, alkali-activated mortars (AAM) containing BP at 8%, 16%, 24%, 32% and 40% substitution rates for GBFS were developed. Mortars were synthesized with a sodium silicate/sodium hydroxide ratio of 3.0 for the binder materials and a 0.45 alkali activator-to-binder ratio. The flow diameters of the fresh mortars prepared using 40x40x160 mm molds were determined according to the European Federation of Experts in Construction Chemicals and Concrete Systems (EFNARC) standard. The fresh AAMs were wrapped in stretch film to prevent evaporation and then kept in an oven at 60°C for 48 hours. The cured samples were evaluated for their mechanical strengths at 3 and 28 days, freeze-thaw effects after 33 and 100 cycles, and microstructures after 100 cycles. According to the results, using 40% BP instead of GBFS caused a decrease of approximately 15.08% in 28-day compressive strength compared to the reference sample (100% GBFS). G100 showed a minimum porosity of 15.81% and a water absorption rate of approximately 7.3%. The G60B40 mixture had the highest sorptivity capacity with 5.29x10-3 cm/s0.5, while the G100 mixture showed the lowest capacity with 3.88x10-3 cm/s0.5. After 100 freeze-thaw cycles, the G60B40 sample had the largest strength loss of 61.61%, while the G100 sample showed the lowest strength loss of 9.89%.
AtıfScopus1
İncele - MakaleYalnız künye2026Scopus SJRQ2Manufacturing, Structural Characterization, and Radiation Interaction Evaluation of Lightweight 6061-Al/Ytterbium(III) Oxide Composites with Emphasis on Gamma-Ray Shielding and Fast Neutron Removal Potential
Guler, Seval Hale; Yayla, Nihal; Guler, Omer; ALMisned, Ghada; Sen Baykal, Duygu; Kilic, Gokhan; Tekin, Huseyin Ozan
In this study, 6061-aluminum metal matrix composites doped with varying concentrations of ytterbium(III) oxide were synthesized using high-energy mechanical alloying to evaluate their structural, physical, and radiation shielding properties. X-ray diffraction confirmed the retention of the aluminum crystal structure with no secondary phase formation, while scanning electron microscopy and energy-dispersive X-ray spectroscopy revealed homogenous dispersion of Yb2O3 particles within the matrix. With increasing Yb2O3 content, particle densification and structural integrity were significantly enhanced. Gamma-ray and neutron shielding performance was assessed through theoretical modeling and Monte Carlo simulations. At low photon energy, the 20 wt% Yb2O3 composites showed a remarkable increase in linear attenuation coefficients compared to the undoped 6061-aluminum matrix. Neutron removal efficiency also increased by 32% at the highest Yb2O3 content. It can be concluded that Yb2O3 incorporation significantly improves both the photon and neutron shielding performance of the 6061-aluminum metal matrix.
- MakaleAçık Erişim2026Scopus SJRQ2Protective Effect of Propolis Against Oxidative Damage Caused by Cyfluthrin Insecticide on Gammarus pulex
Serdar, Osman
This study aimed to investigate both the protective and therapeutic effects of propolis (PP) against pesticide-induced oxidative stress in aquatic environments. For this purpose, Gammarus pulex was exposed to 0.00 (control), 0.05, 0.1, and 0.2 ppm concentrations of cyfluthrin (CYF) to determine its toxic effects. To evaluate the protective effect of PP, 5 ppm of PP was added to each pesticide concentration. Samples were collected from all experimental groups after 24 and 96 hours under appropriate conditions. SOD activity decreased under CYF exposure but increased significantly after PP supplementation. Although CAT activity did not show significant changes with CYF alone, it increased in the presence of PP. GPx activity remained statistically unchanged under CYF exposure but increased following PP treatment. CYF exposure led to decreased GSH levels; however, PP did not significantly alter GSH levels. TBARS levels increased due to CYF, and this increase was alleviated by PP application.
- MakaleYalnız künye2026Scopus SJRQ3Sequence Analysis and Genetic Diversity of ndhF of the Chloroplast DNA (cpDNA) of Chrysophthalmum (Asteraceae) Species in Türkiye
Sevindik, Emre; Gelir, Seda Nur; Demircan, Şelale; Çiftçi, İbrahim; Paksoy, Mehmet Yavuz
Absract: In this study, chloroplast DNA (cpDNA) ndhF sequence analysis was used to determine the sequence analysis and genetic diversity of Chrysophthalmum Schultz Bip. species distributed in Türkiye. Genomic DNA was isolated from green leaves and cpDNA ndhF region was amplified by PCR. The results of the PCR, the forward and reverse sequences were edited using the Sequencher 5.4.6 programme and the contig sequences were obtained. To determine the phylogenetic relationships between species, MEGA 6.0 was used to construct a maximum likelihood (ML) tree. Using the same program, nucleotide composition, phylogenetic trees, genetic distance matrix, and genetic diversity analyses were performed. In addition, the physicochemical properties and 3D structure of ndhF proteins were determined. From the results of the ndhF analyses, the nucleotide length of Chrysophthalmum species was found to vary between 471 and 625. The genetic matrix value was determined to be between 0.000 and 0.009. In the phylogenetic tree constructed using ndhF sequences from Anvillea DC., Pulicaria Gaertn., Limbarda Adans, Inula L., Carpesium L., Pentanema Cass., Dittrichia Greuter, Rhanteriopsis Rauschert and Telekia Baumg species from NCBI, C. montanum was grouped with Inula, Pentanema and Rhanteriopsis species. C. gueneri was grouped with C. dichotomum and Pentanema alanyense. Previous phylogenetic studies were in agreement with our results. In addition, the ndhF results supported that Chrysophthalmum species are not a monophyletic group.
AtıfWoS1İncele - MakaleAçık Erişim2026Scopus SJRQ1Assessing interrelationships among circular economy implementation strategies
Ahmadi, Hadi Badri; Gul, Muhammet; Gupta, Himanshu; Yucesan, Melih; Liou, James J.H.
Strategies for implementing a circular economy (CE) are designed to enhance resource efficiency, minimize the consumption of raw materials, and decrease waste. Although many articles have investigated CE implementation strategies, research focusing on the interactions and interrelationships among these strategies remains scarce. To address this issue, this study develops an evaluation framework, with the aim of assessing the interactions among strategies for CE implementation in the context of the manufacturing sector of an emerging economy using Decomposed Fuzzy Decision-Making Trial and Evaluation Laboratory (DF-DEMATEL) methodology. The findings suggest that “Investment in green technology” is the most critical strategy and should receive the greatest attention for successfully implementing CE. This research helps industrial decision-makers and specialists to invest in the most critical strategies within their supply chains and move towards sustainable development.
- MakaleAçık Erişim2026Scopus SJRQ1A new key generator algorithm based on sine map and SHA-3 for image encryption
Artuğer, Fırat; Özkaynak, Fatih
In recent years, the need for secure cryptographic keys for various purposes has been constantly increasing. One of these areas is undoubtedly image encryption. In this study, a new key generation algorithm has been developed for use in image encryption algorithms. The proposed generator has a hybrid structure based on the chaotic sine map and the SHA-3 algorithm. It is aimed to produce strong keys by using the benefits of these two structures. To do this, first, bit sequences of the desired length are generated using the basic parameters of the sine map. Then, bit sequences of the same length are obtained using the SHA-3 algorithm. These two bit sequences are then subjected to an XOR operation to generate key values of the desired length. With this structure, 3 different bit sequences of 1 million length were produced. All of these bit sequences successfully passed NIST SP 800 − 22 tests. This key value obtained in this study has been successfully applied to a new image encryption algorithm. The results of the study demonstrate that the proposed algorithm meets important cryptographic criteria such as information entropy, correlation-histogram analysis, NPCR, and UACI values. In addition, the simple and fast structure of the algorithm in key generation was the most important difference from other studies.
AtıfScopus3OpenAlex2İncele - MakaleAçık Erişim2026Scopus SJRQ2Oxidative polycondensation of phenylhydrazine-based Schiff base: structural, thermal, optical and dielectric investigations
Kaya, İsmet; Bayır, Erdal; Solmaz, Adnan
In this study, the Schiff base 3-((2-phenylhydrazono)methyl)benzene-1,2-diol (3-PHMB) was synthesized through a condensation reaction between 2,3-dihydroxybenzaldehyde (2,3-DHBA) and phenylhydrazine (PH). The obtained Schiff base was subsequently subjected to oxidative polymerization in a 10% KOH (w/v) aqueous medium using hydrogen peroxide (35% H₂O₂), sodium hypochlorite (6–14% NaOCl), and oxygen (O₂) as oxidants, yielding the oligomers o-(3-PHMB)-P, o-(3-PHMB)-H, and o-(3-PHMB)-O. The structural, morphological, thermal, optical, and electrochemical characteristics of the synthesized compounds were comprehensively investigated using FT-IR, NMR, SEM, TG-DTA, UV-Vis, CV, and GPC techniques. UV-Vis and CV analyses revealed that the optical band gaps (Eg) were 2.33 eV for 3-PHMB, 2.06 eV for o-(3-PHMB)-P, 2.16 eV for o-(3-PHMB)-H, and 2.02 eV for o-(3-PHMB)-O, while the electrochemical band gaps (Eg′) were calculated as 2.03 eV, 1.65 eV, 1.63 eV, and 1.50 eV, respectively. Thermal analysis showed that the char yields at 1000 °C were 41.43% for o-(3-PHMB)-P, 38.72% for o-(3-PHMB)-H, and 44.35% for o-(3-PHMB)-O. Dielectric measurements indicated that o-(3-PHMB)-O exhibited higher polarization capacity and energy storage ability compared to the other oligomers. Moreover, the electrical conductivity values increased steadily with frequency; at 100 kHz, the conductivity was recorded as 1.74 × 10⁻⁵ S cm⁻¹ for o-(3-PHMB)-O and 1.64 × 10⁻⁵ S cm⁻¹ for o-(3-PHMB)-P. These findings demonstrate that the synthesized Schiff base oligomers are promising candidates for dielectric and optoelectronic applications due to their high thermal stability, controlled molecular weight distribution, and semiconducting properties.
- MakaleYayıncıda açık erişim2026Scopus SJRQ1Phenolic Profiling of Some Bryophyte Species: In Vitro and In Silico Assessment of Their Antimicrobial Potentials
Çambay, Zafer; Uslu, Harun; Coteli, Ebru; Göktaş, Bünyamin; Özdemir Bayçinar, Kevser; Emre, Mustafa Yunus; Güngören, Muhammed; Alataş, Mevlüt
This study explores the phytochemical composition and antimicrobial potential of Palustriella commutata, Philonotis calcarea, Cinclidotus riparius, Rhynchostegium riparioides, Plagiomnium ellipticum, and Porella platyphylla, with a focus on bryophyte species phenolic constituents and biological activities. HPLC analysis identified seven phenolic acids (4-hydroxybenzoic acid, 2,5-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid, caffeic acid, vanillic acid, syringic acid, and p-coumaric acid) across all species in varying concentrations. In in vitro antimicrobial tests, the bryophyte extracts used showed significant activity against Pseudomonas aeruginosa (ATCC 9027), while exhibiting relatively lower inhibition against Staphylococcus aureus (ATCC 25923). The study showed that all species extracts exhibited comparable activity to erythromycin against P. aeruginosa, while Cinclidotus riparius and Plagiomnium ellipticum extracts showed no activity against S. aureus, and the remaining species exhibited lower activity compared to erythromycin. Molecular docking studies demonstrated strong binding affinities of these phenolics to the active site of the target macromolecule (PDB ID: 3FRQ), suggesting meaningful interactions with residues such as ARG122 and ASN123, similar to erythromycin binding patterns. The findings indicate that bryophyte-derived phenolic compounds possess significant antimicrobial potential and may serve as promising candidates for the development of novel bioactive agents. This study provides a broad framework for the insufficiently researched antimicrobial potential of bryophytes by establishing direct links between species-specific phenolic fingerprints, experimentally observed antibacterial activities, and predicted receptor-level interactions. Further complementary biological studies are needed to confirm and expand upon these results.
- MakaleYalnız künye2026Scopus SJRQ2Influence of Boron Addition on the Microstructure, Mechanical, and Corrosion Behavior of NiCrBSi Alloys Prepared by Spark Plasma Sintering
Çelik, Ertuğrul
This study investigates the effect of boron addition on the microstructural, mechanical, and corrosion properties of NiCrBSi alloy fabricated by the spark plasma sintering (SPS) method. Boron was added at levels of 1.5, 3, and 4.5 wt.%, and sintering was conducted at 950 °C for 5 min. Microstructural characterization was carried out using SEM–EDS and XRD analyses, hardness was measured by the Vickers method, and densities were determined according to Archimedes’ principle. The transverse rupture strength (TRS) was obtained by three-point bending tests, while wear performance was evaluated in a reciprocating wear mode. Corrosion behavior was examined through potentiodynamic polarization in a 0.1 M HCl solution. Increasing boron content promoted the formation of nickel and chromium boride phases, enhancing hardness (up to 675 HV0.5) and wear resistance but reducing TRS values due to brittle intermetallic formation. Furthermore, corrosion protection efficiency improved, reaching about 65.9% at 4.5 wt.% B addition.
