bluuebunny/crossref_metadata_2025 huggingface dataset:
A critical review of composite filaments for fused deposition modeling: Material properties, applications, and future directions
Authors: Kaptan Arslan , Kartal Fuat
Published: August 2024

This review paper provides a comprehensive analysis of recent advancements in the development and application of composite filaments for fused deposition modeling (FDM) 3D printing technology. Focusing on the integration of various materials such as nano-fillers, fibers, and bio-based polymers into polylactic acid (PLA) and other thermoplastics, this study delves into how these composites enhance mechanical, thermal and functional properties of the printed objects. We critically assess studies that investigate the impact of raster orientation, filler content, and material composition on tensile, bending, and impact strength, as well as on the thermal stability and degradation behavior of composite filaments. The review highlights key findings from the literature, including the optimization of filament formulations to achieve superior mechanical performance, improved thermal resistance, and specific functional characteristics suitable for a wide range of applications from biomedical to structural components. Moreover, this paper discusses the challenges associated with composite filament production, including material compatibility, dispersion of nano-fillers, and the need for printer hardware adjustments. Future directions for research in the field are identified, emphasizing the potential for new material combinations, sustainability considerations, and the development of filaments designed for specific industrial applications. An effective way to better meet designers’ expectations for qualified materials is composite filaments. This review focuses on how these elements can be applied to improve both product design and functionality. A guide is presented in choosing composite filaments that can meet the features expected from the designed product.
Solution scheme development of the nonhomogeneous heat conduction equation in cylindrical coordinates with Neumann boundary conditions by finite difference method
Authors: Yıldız Melih
Published: August 2024

Partial differential heat conduction equations are typically used to determine temperature distribution within any solid domain. The difficulty and complexity of the solution of the equation depend on differential equation characteristics, boundary conditions, coordinate systems, and the number of dependent variables. In the current study, the numerical solution schemes were developed by the Explicit Finite Difference and the Implicit Method- the Crank-Nicolson techniques for the partial differential heat conduction equation including heat generation term described as one-dimensional, time-dependent with the Neumann boundary conditions. The solution schemes were, then, applied to the battery problem including highly varying heat generation. Besides, the solution of the problem was performed by using Matlab pdepe solver to verify the developed schemes. Results suggest that the Crank-Nicolson scheme is unconditionally stable, whereas the explicit scheme is only stable when the Courant-Friedrichs-Lewy condition requirement is less than 0.3404. Comparing the developed schemes to the results obtained from the pdepe solver, the schemes are as reliable as the pdepe solver with certain grid structures. Besides, the developed numerical schemes allow for shorter computational times than the pdepe solver at the same grid structures when considering CPU times.
Investigation of monolayer anodized TiO2 film and bilayer spin coated graphene film on corrosion and tribocorrosion properties of Ti45Nb alloy
Authors: Acar Muhammet Taha
Published: August 2024

This study investigates the structural, corrosion, and tribocorrosion properties of Ti45Nb alloy coated with monolayer and bilayer films. Ti45Nb samples were ultrasonically degreased, anodized in a H2SO4 and H3PO4 solution, and coated with graphene oxide (GO) films via spin coating and subsequent annealing. The anodized samples exhibited anatase and rutile phases, while GO films displayed characteristic Raman shifts indicating graphite oxidation. Corrosion tests in simulated body fluid (SBF) revealed enhanced corrosion resistance in bilayer samples, evidenced by a lower corrosion current density (2.28×10-6 A/cm2) and a higher corrosion potential (10 mV) compared to monolayer and untreated samples. Electrochemical impedance spectroscopy (EIS) indicated superior charge transfer resistance (9.72 Ωcm2) for bilayer coatings. Tribocorrosion tests demonstrated reduced wear rates and coefficient of friction (COF) in bilayer films, attributed to increased surface hardness and load-carrying capacity. The findings suggest that the bilayer coating significantly enhances the corrosion and tribocorrosion resistance of Ti45Nb, making it a promising material for biomedical applications.
Mechanical analysis of al/foam composite sandwich panels under elastic and elastoplastic states
Authors: Eruslu Sait Özmen
Published: August 2024

This study performs mechanical analysis for Al/Foam composite sandwich panels under 3-point bending using numerically and experimentally. The flexural rigidity, elastic deflections, and normal, shear stresses are obtained by analytical calculations of the Timoshenko beam equation and compared finite element (FE) models for 3-point bending loading conditions. The FE models are constructed using 2D single-layer shell and 3D solid discrete-layer models. The validity of FE models at the analysis is evaluated for Al/PVC Foam sandwich composites for the elastic state. The experimental bending results of Al/XPS Foam sandwich composites are compared with numerical models at elastic and elastoplastic states. The elastic results indicate that the out-of-plane deflection results agree well across numerical and analytical models. Normal stresses at the core are higher in 3D discrete-layer solid models compared to laminated shell theory-based models for thick plates, due to the more accurate characteristics of the discrete-layer solid models. The Timoshenko beam theory-based analytical bending results show a good correlation with the results from laminated shell theory-based finite element method (FEM) analyses. Elastoplastic FEM analysis indicates that discrete-layer-based 3D solid FEM models effectively predict local effects dependent on indentation failure.
Perancangan Sistem Deteksi Objek Bola Dan Gawang Pada Robot Sepakbola Menggunakan Metode Darknet YOLO
Authors: Nugroho Dwi Novianto , Anifah Lilik
Published: August 2024

Di bidang robotika, terdapat salah satu jenis robot yang memiliki kemampuan untuk bermain sepakbola, yaitu robot sepakbola humanoid. Robot ini diharapkan memiliki kemampuan utama dalam mendeteksi objek yang ada di lapangan, terutama objek bola dan gawang. Oleh karena itu, perlu dikembangkan sistem deteksi objek bola dan gawang dengan tingkat keakuratan yang tinggi, agar robot dapat mengidentifikasi objek yang tepat untuk menjalankan tugas-tugas selanjutnya. Penelitian ini menggunakan platform robot ROBOTIS OP3 yang terintegrasi dengan webcam Logitech C920. Sistem pendeteksian yang digunakan adalah Darknet YOLO, yang merupakan salah satu penerapan dari deep-learning. Jaringan YOLO yang digunakan dalam penelitian ini adalah YOLOv3 Tiny, dan tahapan pelatihannya melibatkan framework Darknet. Pada tahap pelatihan jaringan, diperoleh nilai rata-rata loss (avg loss) sebesar 0,2805 dan nilai mean Average Precision (mAP) sebesar 96,3%. Pada tahap pengujian jaringan, dihasilkan frame gambar sistem pendeteksian objek yang terdeteksi dengan diberi label "bola" dan "gawang” serta bounding box. Pada penelitian ini sistem deteksi yang telah dikembangkan menghasilkan nilai performa jaringan dengan nilai accuracy sebesar 0.97, precision sebesar 0.99, recall sebesar 0.96, dan F1-score sebesar 0.97. Nilai-nilai performa jaringan ini diperoleh dari pengujian menggunakan 200 frame gambar yang digunakan sebagai test set dalam tahap pelatihan jaringan.
Development of the Thematic KKN Evaluation Information System MBKM Program Membangun Desa UNS Based on Geographic Information System (GIS)
Authors: Cahya Afif Nur , Sutanto Sutanto , Zuhri Moh Sayful , Aritonang Erikson Vri Anugrah
Published: August 2024

Program Kuliah Kerja Nyata (KKN) merupakan program pengabdian masyarakat yang diperuntukan bagi mahasiswa. Saat ini program KKN menjadi salah satu program unggulan dalam MBKM Membangun Desa. Untuk membuat program lebih berkompeten perlu adanya pengembangan dan evaluasi berkelanjutan. Hal ini sebagai upaya untuk memberikan kontribusi yang cukup signifikan sesuai dengan kebutuhan masyarakat. Perlu adanya sebuah sistem informasi dalam memenuhi kebutuhan tersebut. Salah satu sistem yang dapat digunakan adalah Geographic Information System (GIS) yang merupakan sistem pendataan, penerimaan, dan manajemen berbasis website. Pengembangan sistem informasi berupa halaman pengisian data kelompok mahasiswa, luaran sosial media kelompok mahasiswa, form penilaian desa, dan evaluasi kegiatan program KKNT MBKM Membangun Desa. Framework yang digunakan pada sistem ini adalah Laravel 8(PHP). Hasil yang diberikan berupa penampilan informasi terkait pelaksanaan kegiatan KKN. Dari hasil tersebut dapat digunakan sebagai evaluasi pelaksanaan program- program yang telah dilaksanakan mahasiswa.
Enhancing the Properties of Steel Fiber Self-Compacting NaOH-Based Geopolymer Concrete with the Addition of Metakaolin
Authors: Elbialy Samy , El-Latief Ahmed A. , Al-Jabali Hebah M. , Elsayed Hebatallah A. , Shawky Shymaa M. M.
Published: August 2024

There is a demand for innovative construction materials that offer enhanced mechanical characteristics while also being cost-effective and environmentally friendly. This paper examines the fresh properties and mechanical properties of geopolymerized self-compacting concrete (SCC) reinforced with steel fibers, containing 0–100% metakaolin (MK) by mass, as an eco-friendly substitute for Portland cement. SCC combinations included one or more waste cementitious materials (WCMs), such as metakaolin (MK), NaOH as an alkaline activity, and double-hook end steel fibers. For every NaOH geopolymer SCC blend, the mechanical characteristics (compressive strength, splitting tensile strength, flexural strength), as well as the new properties (lump flow, V-Funnel, L-box test), were read up. The findings indicate that combining metakaolin and steel fibers reduces the flowability of NaOH-based geopolymer SCC. On the other hand, incorporating MK and steel fibers enhances the compressive and flexural strength of NaOH-based geopolymer SCC with 25% metakaolin and 0.3% steel fiber. In contrast to the fiber-reinforced NaOH-based geopolymer SCC samples, which could transfer a sizable load even when the crack mouth opening deflection rose at flexural strength, the fiber-free SCC samples showed a brittle and abrupt fracture. The findings showed that the addition of NaOH as an alkaline activator, MK, and steel fiber had a negative impact on the fresh state properties; however, their combined use greatly enhanced the bond strength and flexural performance of the NaOH geopolymer SCC specimens. Doi: 10.28991/CEJ-2024-010-07-011 Full Text: PDF
Evaluating Partial Safety Factors for Shear Strength in Bearing Capacity Calculations for Cohesionless Soils
Authors: Hemada Amr A. , Osman Emad A. M. , Mohamed Ahmed M. A.
Published: August 2024

Calculating bearing capacity is critical when designing shallow foundations. Many countries use limit state design (LSD) as the standard method for geotechnical design. The paper aims to develop realistic LSD partial factors for bearing capacity calculations of shallow foundations on cohesionless soils based on full-scale model tests. The experimental setup consisted of a hydraulic jack, concrete footing, sand samples, and pressure cells placed in a cylindrical wall. Fifteen sand samples were tested and classified by gradation and relative density. Settlement curves were plotted for each sample under an increasing load. The measured ultimate bearing stresses were found to be higher than theoretical values calculated using traditional methods. This indicates that the traditional approach is conservative. The suggested safety factor for the internal friction angle in cohesionless soils (γtan(ϕ)= 1.10) is notably lower than the values specified in Eurocode 7 at 1.25 and the Egyptian code of practice at 1.30. The proposed LSD partial factors allow for more economical designs than traditional factors while maintaining safety. The full-scale model-testing approach is novel and provides realistic factors directly applicable to Egyptian codes. The results are satisfactory and reasonable for the geotechnical design of shallow foundations on cohesionless soils. Doi: 10.28991/CEJ-2024-010-07-015 Full Text: PDF
Effective Stiffness and Damping Analysis of Steel Damper to Lateral Cyclic Loading
Authors: Ampangallo Bastian A. , Parung Herman , Irmawaty Rita , Amiruddin Arwin
Published: August 2024

Steel dampers are components used in building structures to reduce vibration and energy generated by dynamic loads such as earthquakes. Several factors affect the effectiveness of steel dampers in reducing energy, including the cross-sectional area, mass distribution, cross-sectional geometry, and material stiffness. The cross-sectional geometry or shape of the steel damper can affect how energy is absorbed and dissipated in the structural system. Cross sections with different geometric variations can have different mechanical responses to dynamic loads. This study aims to analyze which type of steel damper is effective in terms of stiffness and damping capacity against lateral cyclic loads. The steel damper cross-sectional variations used are slit steel dampers (SSDs), tapered steel dampers (TSDs), and oval steel dampers (OSDs). Cyclic testing of the dampers used displacement control with the same target deviation for all three damper types. The results showed that the stress and strain distributions of the oval steel damper were more even than those of the other two models. The variations in the energy dissipation capacities of the three cross-section variations are relatively the same. However, the slit steel damper type has the best stiffness compared to the other two types. This research is ultimately expected to influence the science of the structure of a building in preventing and anticipating earthquakes or other disasters. Doi: 10.28991/CEJ-2024-010-07-017 Full Text: PDF
Groundwater Quality Assessment in the Middle-Upper Pleistocene Aquifer
Authors: Kieu Le Diem , Nguyen Pham Quoc
Published: August 2024

The study was conducted to assess groundwater quality and identify the main pollution sources of groundwater in Hau Giang province, Vietnam. Groundwater samples were collected at five locations (GW1-GW5) at qp2-3 aquifer in May and October 2022. Principal component analysis (PCA), cluster analysis (CA), water pollution index (WPI), and groundwater quality index (GWQI) were applied in the study. The results revealed that the groundwater quality was influenced by TDS, NH4+-N, permanganate index, and Fe. On the basis of WPI, GW2 and GW3 had the lowest water quality, exceeding a value of 1. The results of GWQI showed that groundwater quality was divided into three categories (excellent, poor, and unsuitable for drinking) in May and four categories (good, poor, very poor, and unsuitable for drinking) in October. The study also revealed seasonal variations in groundwater quality, particularly in GW5 (Vi Thuy district, Hau Giang, Vietnam). The CA results formed four water quality groups in both periods based on the similarity of groundwater parameters. PCA results presented that the three PCs explained 79.55% of the variation in groundwater quality. Three potential sources of pollution are derived from the discharge of wastewater (domestic, industrial, and agricultural), landfilling, and seawater intrusion. Doi: 10.28991/CEJ-2024-010-07-018 Full Text: PDF
Empirical Model of Unconsolidated Tephra Erosion: Verification and Application on Micro Catchment
Authors: Yunita F. Tata , Soekarno Indratmo , Nugroho Joko , Santosa Untung B.
Published: August 2024

Erosion is an important process that shapes the earth's surface. Given the complexity of the process, efforts to understand it are essential. Over the last 50 years, numerous models of soil particle erosion by surface runoff emerged, some of which share similar forms and parameters. The differences lie in the coefficient values of the parameters, attributed to the characteristics of the soil material such as texture, structure, and organic matter content. However, these erosion models tend to underpredict in the case of new volcanic deposit erosion. The erosion model for unconsolidated tephra, proposed by Yunita, was developed through laboratory experiments using volcanic material from Merapi Volcano, Indonesia. Nevertheless, the model has not been implemented for other cases. Therefore, this study aims to verify the erosion model for volcanic material in other cases, explore the possibility of broader implementation, identify the factors that influence its accuracy, and determine the model’s limitations. To verify the model’s potential for broader application, we applied it to micro-scale catchments in St. Hellens (USA), Sakurajima (Japan), and a laboratory scale plot in Merapi (Indonesia). The verification yielded satisfactory results for all three cases, especially for new tephra deposits. In the case of St. Helens, the extrapolation of model coefficients was proven to still be applicable even for thicker tephra layers. However, the erosion prediction was overestimated for tephra layer deposits older than 1 year, as the erosion rate decreases over time due to the compaction and stabilization of the tephra layer. In the Sakurajima, the model was also suitable for predicting long-term erosion amounts (daily and monthly). Meanwhile, in Merapi, the model provided accurate predictions for slopes of 20º and 25º but was less accurate for 30º slopes, where the measured erosion was due to both erosion and slope failure. These verification results demonstrate the potential of applying the empirical erosion model to micro catchments with relatively homogenous slopes and tephra properties. The sensitivity test revealed that slope, runoff, rainfall intensity, and volcanic ash thickness are strongly influence the erosion rate. This study also simplified the volcanic ash erosion model as a function of slope (S0), runoff (q), and rainfall (i) by assuming the value of (1-τc/τ0) is equal to 1. Further study using GIS tools is required for its application on several catchments with heterogeneous characteristics. Doi: 10.28991/CEJ-2024-010-07-02 Full Text: PDF
Properties and Structure of Functional Concrete Mixtures Modified with River Shell Powder
Authors: Stel’makh Sergey A. , Shcherban’ Evgenii M. , Beskopylny Alexey N. , Hiep Nguyen Quang , Song Yamin , Elshaeva Diana , Chernil’nik Andrei , Shilov Alexandr A. , Karalar Memduh , Aksoylu Ceyhun , Özkılıç Yasin Onuralp
Published: August 2024

The recycling of the aquaculture waste into clam powder reduces solid emissions and natural resources, which is important for Portland cement production. This study determines the feasibility of using recycled river shell waste as a partial replacement for cement in concrete technology. The study used normative methods and optical microscopy; the properties of cement mixtures, such as normal consistency, setting time (ST), compressive and flexural strength, were studied. Research findings have shown that the inclusion of river shell powder (RSP) in cement mixtures can reduce water demand and a decrease in setting time with increasing RSP content. It was also found that the strength of the cement mixture can be maintained with an RSP content of up to 10%. The following properties of the concrete were determined: workability, compressive strength (CS), and water absorption. Using RSP as a partial replacement for cement has been proven to elevate the slump of the fresh concrete cone. CS is maintained at a level comparable to the control composition, with an RSP content of no more than 8%, and water-absorbing is reduced by 7.31%. This study created new compositions, and the links between the ingredients, properties, and structure of cement composites modified with river shell powder were investigated. Additionally, the properties of the structure-formation process of these modified composites were studied. Doi: 10.28991/CEJ-2024-010-07-020 Full Text: PDF
Bond-Slippage Characteristics between Carbon Fiber Reinforced Polymer Sheet and Heat-Damaged Geopolymer Concrete
Authors: Alshuqari Esmail A. , Çevik Abdulkadir
Published: August 2024

The present study investigates the behavior of bond slip between carbon fiber reinforced polymer (CFRP) sheets and heat-damaged geopolymer concrete specimens that have been exposed to various elevated temperatures (20°C, 200°C, 400°C, and 600°C). The research aims to address the challenges posed by elevated temperatures on the bond strength and to highlight our original achievements in understanding and mitigating these effects. To assess the effect of different CFRP bonding widths and lengths, geopolymer concrete specimens were cast and bonded to sheets of CFRP. A total of 32 samples were tested under double-shear tension, examining the mechanical properties of geopolymer concrete, failure modes, bond force-slip curves, ultimate bond force and slip, stiffness, energy absorption, and scanning electron microscopy (SEM) analysis. The study found that temperatures up to 200°C caused a slight decline in mechanical properties and bond-slip behavior, with a 5% decrease in bond force and slippage. At 400°C, bond force and slippage reduced by 16%. Exposure to 600°C led to a significant 42% reduction in bond-slip behavior. The developed bond slippage model showed good agreement with experimental results, providing a valuable tool for predicting bond behavior under high-temperature conditions. Doi: 10.28991/CEJ-2024-010-07-03 Full Text: PDF
Evaluating the Efficiency of Alkaline Activator with Silica-Rich Wastes in Stabilizing Cadmium-Contaminated Soil
Authors: Saeed Khitam , Al-Khyat Sahar , Hacheem Zuhair Abd , Fartosy Sabah H.
Published: August 2024

Contaminant soil remediation has potential engineering applications with various stabilization techniques addressing heavy metal contamination. Conventional soil stabilizers, however, have an environmental impact, promoting international research into environmentally friendly alternatives. Using waste byproducts to produce geopolymer binders as new green cementitious materials can provide an environmentally friendly and effective option for soil improvement. Silica-rich wastes have been advanced as a sustainable option for soil stabilization. The effectiveness of alkaline-activated silica-rich wastes in stabilizing cadmium-contaminated soil and its potential engineering utilization remain of profound significance, demanding sustained and rigorous research investigation. Cadmium was immobilized in silty clay soil by rich silica waste products—fly ash, silica fume, and rice husk ash—at various percentages with 4.5 and 6.5-molar alkaline activators. Unconfined compressive strength tests assessed soil behavior, while Toxicity Characteristic Leaching Procedure (TCLP), pH tests, X-ray diffraction, and scanning electron microscope analyses explained cadmium immobilization mechanisms. The experimental results revealed that alkali-activated silica-rich wastes enhanced strength and cementitious properties and reduced cadmium leaching in the contaminated silty clay. The Finite Element Method was also employed to analyze the bearing capacity of the stabilized contaminated soil. The numerical results support the experimental results and confirm increased soil strength and reduced compressibility, endorsing the efficacy of the stabilization techniques and environmental benefits. Doi: 10.28991/CEJ-2024-010-07-04 Full Text: PDF
Effectiveness of Grouting and GFRP Reinforcement for Repairing Spalled Reinforced Concrete Beams
Authors: Mansur Achmad Z. , Djamaluddin Rudy , Parung Herman , Irmawaty Rita , Nawir Daud
Published: August 2024

Corrosion of steel reinforcement from chloride exposure can compromise the strength of reinforced concrete structures. Rust formation expands, applying pressure on concrete, resulting in cracks and spalling. Prompt repair is crucial for severe cases of spalling. This research assessed the efficacy of repair strategies for reinforced concrete beams post-spalling, including grouting and different techniques involving Glass Fiber Reinforced Polymer (GFRP) reinforcement. The research examined four variations of reinforced concrete beams, each sized at 150 mm × 200 mm × 3300 mm. Results showed that the standard beam (BK) had an average maximum load capacity of 29.74 kN. In contrast, the grouted beam (BGR) demonstrated a reduced maximum load of 14.39 kN, along with decreased steel and concrete strain compared to BK. This suggests that the grouting repair did not fully restore the beam's flexural capacity after spalling. Incorporating GFRP strips (BGRS) led to a marginal increase in the beam's maximum load, albeit remaining below BK, with lower steel and concrete strain than BK. However, the steel and concrete approached their yield points, indicating enhanced flexural performance. The full-wrap GFRP beam (BGRSF) experienced an 8.08% increase in maximum load compared to BK, with concrete strain surpassing BK, suggesting an enhancement in flexural stiffness. Doi: 10.28991/CEJ-2024-010-07-05 Full Text: PDF
Assessing Multifaceted Effects of Speed Humps and Bumps: Travel Time, Safety, and Environmental Considerations
Authors: Shwaly Sayed A. , El-Ayaat Amal , Osman Reem
Published: August 2024

This study focuses on investigating the significant impacts of speed breakers on various parameters, including travel time delays, vehicle speeds, fuel consumption, pavement maintenance costs, and vehicular exhaust emissions. Field data was collected and analyzed to assess the effects of different types of traffic calming measures on these parameters. The findings provide valuable insights into the implications of speed breakers on road safety, environmental pollution, and overall road infrastructure management. The results reveal that the implementation of speed humps, speed bumps, and triple bumps effectively slows down vehicles, as evidenced by considerable reductions in the 85th percentile speeds. The reduction percentages were 41.65% for speed humps, 73.52% for speed bumps, and 86.27% for triple bumps. This indicates the effectiveness of these traffic calming measures in improving road safety by reducing vehicle speeds. However, the presence of speed breakers also leads to increased travel time delays. On average, traversing stretches with speed humps, speed bumps, and triple bumps resulted in delays of 9.31, 16.42, and 29.51 seconds, respectively. While the individual delay times may appear relatively short, the cumulative effect of multiple speed obstacles along a road needs to be considered. Another significant impact observed is the increased fuel consumption associated with speed breakers. The study found that for every 100 km of travel, motorcycles and passenger cars consumed approximately 12.07 km and 27.37 km of additional fuel, respectively, when the density of speed breakers was 1.33/km. This translates to a fuel consumption increase of 13.73% for motorcycles and 37.74% for passenger cars. Furthermore, the presence of speed humps was found to contribute to pavement deterioration, as indicated by decreased Pavement Condition Index (PCI) values. The study also revealed that sections with speed humps incurred significantly higher maintenance costs compared to sections without speed humps. The increase in maintenance cost ranged from 100 to 264% across different road sections, with higher traffic volumes leading to greater cost escalation. Additionally, the study confirms that lower vehicle speeds, particularly between 0-15 km/hr, are associated with higher emissions of pollutants, including carbon monoxide (CO) and other pollutants. This highlights the environmental implications of speed breakers and their contribution to urban air pollution. Doi: 10.28991/CEJ-2024-010-07-07 Full Text: PDF
Strength and Acid Resistance of Mortar with Different Binders from Palm Oil Fuel Ash, Slag, and Calcium Carbide Residue
Authors: Abdulmatin Akkadath , Sa Nurihan , Dueramae Saofee , Haruehansapong Sattawat , Tangchirapat Weerachart , Jaturapitakkul Chai
Published: August 2024

This study deals with the use of ground palm oil fuel ash (GPOFA) in combination with ground granulated blast furnace slag (GGBFS) and ground calcium carbide residue (GCR) to produce the binary and ternary binders-based alkali activated mortar. The appropriate content of materials in each binder type was determined as a function of compressive strength. The results revealed that both GPOFA:GGBFS and GPOFA:GCR binders had an optimum blending ratio of 70:30 wt%, while the GPOFA:GGBFS:GCR binder was 55:30:15 wt%. An alkaline catalyst of NaOH was admixed to the best mixture in each binder type to stimulate the mortar's compressive strength. The sulfuric acid (H2SO4) resistance of the mortar in terms of weight change was also examined. The addition of 1M NaOH in both binary and ternary binders could enhance the compressive strength and H2SO4 resistance of the mortar. The highest compressive strength and lowest weight change due to soaking in H2SO4 solution were found in the ternary binder mortar with a 1 M NaOH. The mortar with GCR immersed in H2SO4 solution resulted in an increased weight, which was different from that of the mortar without GCR. The microstructural analysis of the alkali-activated pastes indicated more reaction products than in the case of the pastes without alkali activator. However, a higher concentration of 2 M NaOH resulted in a poor microstructure, which had a negative effect on the compressive strength and H2SO4resistance. Doi: 10.28991/CEJ-2024-010-07-08 Full Text: PDF
Post-Earthquake Liquefaction Vulnerability Mapping by Swedish Weight Sounding and Standard Penetration Test
Authors: Irdhiani . , Rifa’i Ahmad , Fathani Teuku Faisal , Adi Agus Darmawan
Published: August 2024

On September 28, 2018, a 7.5-magnitude earthquake struck Palu City, Sigi Regency, and Donggala Regency in Central Sulawesi. It triggered liquefaction in different locations, including Balaroa, Petobo, Jono Oge, and Sibalaya; Typically, a significant number of studies conducted in the Balaroa region relied on a small amount of field test data to cover a rather large area. This research aims to map the liquefaction vulnerability by analyzing the data from both the Swedish Weight Sounding (SWS) and the Standard Penetration Test (SPT) in the Balaroa area. The SWS data was acquired through mapping using a systematic grid sampling method at ten different locations. The liquefaction potential was analyzed based on the N values by converting the SWS data (Nsw and Wsw) to Nvalues using the Inada equation (1960). Afterward, the analysis findings were verified by comparing them with the SPT data obtained from the same area. Based on the SWS and SPT data analysis results, all locations, including the adjacent areas, exhibited very high liquefaction vulnerability. In contrast, the SPT data indicated that the areas further from the spots exhibited low and very low liquefaction. The findings indicated that the occurrence of post-earthquake liquefaction in Balaroa and other regions within Palu City is prone to recurrence following earthquakes of specific magnitudes. Doi: 10.28991/CEJ-2024-010-07-09 Full Text: PDF
Bizans’tan Türk Dönemine Bir Maddi Kültür Örneği: Konya ile Sille Arasındaki Akmanastır (Khariton Manastırı)
Authors: Ataç Nergis
Published: August 2024

Konya’nın Sille mahallesinde, Takkeli Dağı’n eteklerinde yer alan Akmanastır günümüzde askeri alanda bulunmaktadır. 20. yüzyılın başlarında manastırı ziyaret eden seyyahlar, Aziz Khariton yortusunun burada kutlandığını bildirmişler ve manastır hakkında kısa tasvirler yapmışlardır. Manastırda farklı isimler ve farklı sayıda dini yapılar bildirilmiş, çeşitli kitabelerin transkripsiyonları hazırlanmıştır. Manastırda mescit de bulunmuş ve Eflâkî’de geçen Mevlâna ile ilişkilendirilmiştir. Eflâkî’deki Eflatun Manastırı’nın Akmanastır olduğu araştırmacıların çoğunluğu tarafından kabul görürken, farklı yapılarının tarihlendirilmesi ve evreleri çeşitli zaman dilimlerine dayandırılmıştır. Hangi yapıların duvar resimleri bulunduğu ve bunların türlerinin ne olduğu sorusu hala tartışılmaktadır. Konu hakkındaki bulgular, sınırlı olanaklardan ötürü ayrıntılı çalışılamamıştır. Çalışmamızda manastırın Hıristiyan ve İslam dini yapıları incelenmiş, sözlü ve yazılı arşivler taranmış, mimarisi büyük oranda laser scanner ile taranıp ortofotoları çıkarılmış, ayrıca fotoğraflanarak belgelenmiş, Bizans-Türk dönemi ilişkisi üzerinde durularak Orta Çağ Hıristiyan-Türk İslam özellikleri tartışılmıştır. Çalışmamızın sonucunda, Akmanastır’ın Bizans ve Türk dönemlerinde manastır işlevine devam ettiği, önemli dini bir merkez olduğu, mimarisinde onarımlar dışında yeni mekânlarında eklendiği ve süslendiği tespit edilmiştir.
EVALUATION OF SOCIAL SKILLS PROBLEM BEHAVIORS AND ACADEMIC COMPETENCE OF CHILDREN WITH BORDERLINE INTELLECTUAL FUNCTIONING
Authors: ŞEN SÖNMEZ Aslı , ATUK Muammer Volkan
Published: August 2024

Bu araştırmada sınır zihin yetersizliği olan ve normal gelişim gösteren çocukların, sosyal becerilerini problem davranışlarını ve akademik yeterliliklerini değerlendirmek ve sosyal beceriler, problem davranışlar ve akademik yeterlik
arasındaki ilişkiyi ortaya koymak amaçlanmıştır. Araştırmanın çalışma grubunu, 2023-2024 Eğitim-Öğretim yılında Eskişehir ili, Odunpazarı ilçesinde Milli Eğitim Bakanlığına bağlı okullarda eğitim almakta olan 112 normal gelişim
gösteren ve 30 sınır zihinsel yetersizliği olan 7-12 yaş grubunda bulunan çocuklar oluşturmaktadır. Araştırmada veri toplamak için sınır zihinsel yetersizliği olan ve normal gelişim gösteren öğrencilerin sosyal becerileri, problem
davranışları ile akademik yeterliliklerini belirlemek amacıyla ‘Sosyal Becerileri Dereceleme Sistemi kullanılmıştır. Verilerin analizinde, karşılaştırılan iki seçenekli değişkenler için Mann Whitney U analiz yöntemi; karşılaştırılan
üç ve daha fazla seçenekli değişkenler için ise, Kruskal Wallis H analizleri kullanılmıştır. Araştırma sonucunda sınır zihinsel yetersizliği olan ve normal gelişim gösteren çocukların sosyal beceri, problem davranış ve akademik
yeterlilik puanları arasında yüksek oranda ilişki bulunmuştur. Sosyal beceri ve akademik yeterlilik ortalamaları incelendiğinde normal gelişim gösteren grubun, sosyal beceri ve akademik yeterlilik ortalamasının daha yüksek olduğu;
sınır zihinsel yetersizliği olan öğrenci grubunun problem davranışlar puanı bağlamında ortalamalarının fazla olduğu belirlenmiştir.
FIELD OF APPLICATION OF THE VIENNA SALE AGREEMENT AND THE BUYER’S OBLIGATIONS
Authors: DUMLUDAĞ Mihri Sinem BAYRAM
Published: August 2024

Milletlerarası ticaretin artmasına paralel olarak ortaya çıkan hukukun yeknesaklaştırılması ihtiyacının bir sonucu olarak BM tarafından Viyana Satım Antlaşması (CISG) hazırlanmıştır. Antlaşma hazırlanırken bazı ilkeler temel alınmıştır.
Bu ilkeler; sözleşme özgürlüğü, iradelerin yorumu, sözleşme’nin ayakta tutulması, teamüllerin önemi ve dürüstlük ilkesidir. Türkiye’nin de taraf olduğu Antlaşma’nın uygulama alanının tam olarak tespit edilmesi, hangi tür satımlara
uygulanıp, uygulanmayacağı meselesi önemlidir. Zira oldukça fazla ülkenin taraf olduğu bu Antlaşma’nın uygulama alanı bakımından temel nokta Antlaşma’nın yalnızca menkul mallara uygulanacak olmasıdır. Ayrıca satım sözleşmesinin
taraflarının işyerlerinin farklı ülkelerde bulunması da Antlaşma’nın uygulanması bakımından aranan şartlardan biridir. Antlaşma kapsamında gerek alıcının gerek satıcının bazı yükümlülükleri bulunmaktadır. Bu yükümlülüklerden alıcıya
ait olanlar bu çalışmanın kapsamında incelenmiştir.
REDUPLICATIONS IN THE TRANSLATIONS OF “FALLING LEAVES” AND “DEATH AND THE DERVISH”
Authors: OSMANBEGOVİC Samira , PECO İda
Published: August 2024

Bu makalenin amacı Türkçeden Boşnakçaya (Yaprak Dökümü) ve Boşnakçadan Türkçeye (Derviş ve Ölüm) tercüme edilmiş edebî eserlerde ikilemelerin nasıl tercüme edildiğini inceleyip elde edilen verileri karşılaştırmak, söz konusu dillerin
bu yapıya meyillerini ortaya koymak ve mütercimlerin ikilemelere uygun karşılık bulup bulmadıklarını incelemektir. İçerik analizi yöntemi kullanılarak elde edilen veriler tanımlayıcı istatistik metoduyla Yaprak Dökümü eseri ile
Türkçeden Boşnakçaya çevirisinde ikilemelerin görevleri ve anlamı açısından doğru tercüme edilmiş, yanlış tercüme edilmiş ve tercüme edilmemiş ve Derviş ve Ölüm eseri ve Boşnakçadan Türkçeye çevirisinde ikilemelerin görevleri ve
anlamı açısından doğru tercüme edilmiş, yanlış tercüme edilmiş ve gereksiz tercüme edilmiş olarak üç kategoride değerlendirilmiştir. Çalışmanın sonunda ortaya çıkan sonuçlardan bazıları şu şekildedir: Yaprak Dökümü ve çevirisinde
bulunan ikilemeler Derviş ve Ölüm romanına ve çevirisine göre daha çok kullanılmış, Derviş ve Ölüm romanı ve çevirisinde ise ikilemeler daha az yer almıştır. Her iki tercümede de doğru tercüme edilmiş ikilemelerin oranının yüksek
olması her iki dile uygun karşılık bulmanın mümkün olduğunu ortaya koymaktadır. Türkçeden Boşnakçaya tercüme edilmemiş ikilemelerin oranı ise mütercimin ana dilinde ikilemelerin sınırlı kullanımının mütercimlerin gözden kaçma oranını
artırdığını göstermektedir. Ayrıca Boşnakça eserde ikileme özelliği olmayan kelimelerin Türkçe çevirisinde gereksiz bir şekilde ikileme olarak tercüme edilmesinin olmasının Türkçenin bu yapıya meylinin olduğunu gösterdiğini ve
mütercimin, ana dilinde bu yapının yaygın kullanımı nedeniyle, orijinal metinde olmayan yerlerde ikilemeleri ürettiğini ifade etmek mümkündür.
COMPARATIVE ANALYSIS ON THE REPRESENTATION OF WOMEN IN THE WARS IN UKRAINE AND PALESTINE IN THE MEDIA
Authors: YILMAZ Efsun ERBALABAN
Published: August 2024

Çalışma nitel bir yaklaşımla, Ukrayna ve Filistin uyruklu kadınların medyada temsil biçimlerini keşfetmek ve açıklamak üzere hazırlanmıştır. Uluslararası kamuoyunda etkiye sahip AP ve AA’nın içeriklerinde farklı inanç ve coğrafyadan
kadınların haber metinlerindeki temsili incelenmiştir. Çalışma kapsamında savaşların başladığına ilişkin ilk haberlerin yayına sunulduğu tarihten itibaren 1 hafta süreyle AP ve AA’nın kurumsal Instagram hesaplarından kadın odaklı
paylaşımlar analiz edilmiştir. Çalışma sonucunda Rusya ve Ukrayna ile İsrail ve Filistin savaşlarına ilişkin haberlerde tüm kadınların her iki kurumda da “kurban” ya da “mağdur” olarak temsilinin öne çıktığı tespit edilmiştir.
Çalışmanın bir diğer bulgusu ise paylaşımlardaki mağdur kadınların sayısı, niteliği ve tematik vurgularının kurumlara göre gösterdiği farklılıklardır. Savaş bölgesindeki kadınların milliyetleri ve etnik kökenlerinin de farklı medya
kurumlarındaki temsil biçimlerinde etkili olduğu sonucuna ulaşılmıştır.
ANCIENT MESOPOTAMIAN SPORTS AND OLYMPICS
Authors: DOĞAN Erol , İMAMOĞLU Osman
Published: August 2024

Bu çalışmanın amacı Antik Dönem Mezopotamya’da yapılan bazı sporların ve oyunların araştırılması ve Mezotomya olimpiyat oyunları üzerine güncel yorumlarda bulunmaktır. Literatür taraması yapılmıştır. Mezopotamya’da insanlar, hayvanları
avlamak için çoğunlukla ok ve yay kullanıyorlardı ve mızrak fırlatıyorlardı. Kanıtlar, Asurlular ve Babillilerin de spor olarak yarış ve okçuluk yaptıklarını doğrulamaktadır. Bugün oynadığımız tavla erken Mezopotamya'nın oyunlarından
biri idi. Boks ve güreş en popüler sporlardı ve Gılgamış Destanı’na yansımışlardır. Mezopotamyalılar bowling, polo ve ragbi oynadılar, tanrılar ve tanrıçaları onurlandırmak adına dans ettiler. Dansçılar akrobatik hareketler yaparken
sema danslarını da icra ediyorlardı. Mezopotamyalılar yaptıkları sporları kutlamalarda ve özel günlerde, örneğin iyi bir şey başardıklarında oynarlardı. Sonuç: Antik Dönem Mezopotamya’da bazı sporların (güreş, boks ve dans gibi)
Antik Yunan Olimpiyatları’nın kurulduğu belirtilen dönemden daha eski tarihlerde yapıldığı tespit edilmiştir. Özellikle Sümer ve onun etkilediği Mezopotamya halklarında spor ve oyunlar o dönemlerde yaşayan dünya milletleri içerisinde
en gelişmiş spor faaliyetleri içerisinde kabul edilebilir. Kurallı olarak bazı sporların ilk ortaya çıktığı yer olarak düşünülebilir. Muhtemelen olimpiyat oyunlarına benzer bazı sporlarda organizasyonlar Antik Dönem’de Mezopotamya
halklarında yapılmış olabilir.
THE SITUATION OF SCHOOL SOCIAL WORK IN TÜRKİYE
Authors: CEBECİ Fatih , ARTAN Taner
Published: August 2024

Okul sosyal hizmeti, öğrencilerin okul yaşamını etkileyen sorunların çözümünde öğrenciyi çevresi içinde değerlendiren, akademik yaşantılarının yanı sıra fiziksel ve duygusal ihtiyaçlarına da odaklanan ve eğitim-öğretim sürecinden eşit
bir şekilde yararlanmasını sağlayan sosyal hizmet mesleğinin uygulama alanlarından biridir. Okul sosyal hizmeti dünyanın pek çok ülkesinde uygulanmakta ve bu kapsamda okullarda sosyal hizmet uzmanları istihdam edilmektedir. Arabulucu,
danışman, vaka yöneticisi ve savunucu gibi farklı roller üstlenen okul sosyal hizmet uzmanları öğrencilerin sorunlarını çözebilmek, eğitimin niteliğini artırabilmek ve okul iklimini güçlendirebilmek için mikro, mezzo ve makro düzeyde
müdahaleler yürütmektedir. Öğrencileri etkileyen her türlü bireysel, ailesel ve sosyal sorunlarla ilgilenen okul sosyal hizmeti uygulamasına Türkiye’de henüz resmi düzeyde geçilememiştir. Türkiye’de okul sosyal hizmetinin gerekliliğine
ve hayata geçirilmesine yönelik projeler gerçekleştirilmesine, akademik çalışmalar yürütülmesine ve üniversitelerde birimler kurulmasına rağmen okul sosyal hizmet uzmanları istihdam edilememiştir. Bu çalışmada okul sosyal hizmet
uzmanlarının rol ve görevlerine, okul sosyal hizmet tarihine değinilmiş olup Türkiye’de okul sosyal hizmeti uygulamasına geçilebilmesi adına yapılan çalışmalar incelenerek çeşitli önerilerde bulunulmuştur.
EVALUATION OF THE URBANISATION PROCESS OF KIRIKKALE PROVINCE SPECIFIC TO MACHINERY AND CHEMICAL INDUSTRY INSTITUTION
Authors: CANSARAN Demet
Published: August 2024

Starting from 1925, the Machinery and Chemical Industry Institution has left its mark on the economic, social and cultural development of Kırıkkale. This institution also has a great share in the problems experienced by a young city
that has just entered the urbanisation process on the way to becoming a city. At this point, the positive and negative effects of the Machinery and Chemical Industry Institution in the urbanisation process and the extent to which
its effects continue in the city today were first reviewed in the literature, and then it was tried to be revealed with evaluations made specifically for the city. It is an undeniable fact that the institution has made significant
contributions to the development of the city in economic, social and cultural aspects. This reality manifests itself especially in population growth. The unplanned settlement forms that emerged with the population increase emerged
as the first negative reflection of the institution on the urban development of the city. This situation has brought to the agenda an important problem such as slumming, which a developing city will experience in the long term.
Based on the points mentioned, this study is also important in terms of emphasising the problems parallel to industrialisation in newly developing cities.
IN TERMS OF ART AND DESIGN DISCIPLINES AN ESSAY ON THE CONCEPT OF MULTIDISCIPLINARY, INTERDISCIPLINARY AND TRANSDISCIPLINARY
Authors: BULAT Mustafa , ÖZTAŞYONAR Ramle Gül , BULAT Serap
Published: August 2024

yüzyılın başlarından itibaren, dünyamızda toplumsal, kültürel, ekonomik ve sanatsal olarak büyük değişimler yaşanmış, XX. yüzyılın ilkyarısıyla birlikte var olan Modern Sanat, tüm disiplinlerarası devinimlerin, renkliliğin, yaratıldığı
ve tartışıldığı bu dönemi oluşturmuştur. Sanatçı, çağın bakış açısı ve biçemi ile döneminin ruhunu yaratılarında ortaya koymuştur. Yüzyılımızın ve Modern Sanatın başlangıcını oluşturan Sanat Akımlarına ve bu döneme, disiplinlerarası
sanat açısından bakıldığında, kendine özgü anlayışlar ile tanımlanırlar. Avrupa’da yaşanan zengin refah ve teknik gelişmeler ile başlayan modern sanat hareketleriyle beraber, özellikle I. Dünya Savaşı döneminde ve sonrasında sanatın
disiplinlerarası yönü değiştirmiş, Disiplinlerarası Modern Sanat anlayışı, bu dönemin çağdaş sanat anlayışının sanattaki yansımalarını ortaya koymuştur. XX. yüzyılın başından itibaren yaşanan modernizm anlayışı, tüm toplumsal ve
kültürel değerlerde yaşamsal bir hal aldığı için, çağının ve sonrasının sanatsal geleceğini de biçimlendirmiştir. Disiplinlerarası sanat anlayışları, dönemin sanat anlayışını ve biçim dilini ortaya koymaktadır. Sanatçı XX. yüzyılın
başlangıcından itibaren, sanatsal anlayışıyla doğayı soyutlayarak ve daha sade anlatarak, kendine özgü doğasını yeniden tasarlayıp stilize ederek yorumlamıştır. Aynı zamanda o zamana kadar ortaya konulandan farklı olarak doğayı
disiplinlerarası anlatırken, doğayı parçalayıp yeniden tasarlayarak farklı bir yapıya ulaştırmıştır. XX. yüzyılın başında yaşanmış olan bu modernist ve inter disiplinler bir bakış açısı, sanat alanlarında, sıra dışı gelişmelerin
yaşanmasını neden olmuştur. Toplumsal yapıların modernleşmesi ile buna bağlı olarak disiplinlerarası sanat ve tasarımın da anlam ve içeriğinin farklılaşması; tüm bu elemanların bir arada dönüşerek değişmesi ve içselleştirilmesi
ile sonuçlanarak, günümüze değin sürekliliğini de sağlamıştır. Disiplinlerarası etkileşimler, sanatçılarda felsefe olarak da karşılıklı birbilerinden etkilenmiş, bu yaklaşım ve anlayışlar, çağımızın genel sanat ve didiplinlerarası
yaratım dilinin günümüze değin yaygınlaşmasını sağlamıştır.
AN ANALYSIS OF MIDDLE SCHOOL SOCIAL STUDIES TEXTBOOKS IN THE CONTEXT OF SOCIAL MEMORY
Authors: TEMİZKAN Ömer , ÇAKIR Ahmet Güven
Published: August 2024

Bu araştırmanın amacı ortaokul Sosyal Bilgiler ders kitaplarında yer verilen toplumsal hafıza unsurlarının ele alınarak incelenmesidir. Araştırma metodolojik olarak nitel araştırma yöntemlerinden birisi olan doküman incelemesi kullanılarak
yapılmıştır. Veri kaynağı olarak 2022-2023 Eğitim-Öğretim yılında ortaokullarda Sosyal Bilgiler dersinde kullanılan 5., 6. ve 7. sınıf ders kitapları baz alınmıştır. Araştırmacıların hazırladığı “Toplumsal Hafıza Unsurları İnceleme
Formu” kullanılarak veri kaynağı olan ders kitapları tahkik edilmiş ve bunun sonucunda ulaşılan veriler betimsel analize tabi tutulmuştur. Yapılan analizler neticesinde ulus kimliğin inşasında Sosyal Bilgiler dersinin öneminin
kitaplarda bulunan resimler, metinler ve etkinliklerle toplumsal hafıza bloğumuzda yer alan unsurlardan birçoğunun öğrencilere kazandırılmasının amaçlandığı görülmüştür. Bu anlamda verilen bilgilerin resimlerle desteklenip, öğrenen
merkezli etkinlikler vasıtasıyla desteklendiği de tesbit edilmiştir. Toplumsal hafzıya referansla ele alınan konuların daha çok Osmanlı tarihi ve Cumhuriyet’e ilişkin olduğu ancak bunların yanısıra Türk bilim insanları, askerler,
zafer günleri, bayramlar gibi sembolik bir hafıza mekânı olarak niteleyebileceğimiz unsurları içerdiği çalışma sonucunda gözlemlenmiştir.