This study investigated the mechanical performance of short aramid fiber on polypropylene, polyethylene, polyamide 6, and polyamide 12. Extrusion, press molding, and CNC cutting methods were used in the production of composite samples. Tensile, three-point bending, drop weight and hardness tests of the composites were carried out. As the fiber volume fractions increased, the mechanical properties of the composites improved, but the most efficient fiber fractions for each matrix changed. To analyze the performance of the fibers in the matrix on the composites, scanning electron microscope (SEM) images of the fractured surfaces as a result of tensile and drop weight tests were examined. As the fiber volume fractions increased, the fiber deformation increased, and as a result, the mechanical performance of the composites was adversely affected. Analysis of variance (ANOVA) and F test were performed using signal/noise values to analyze in detail the effect of experimental parameters on output values. Finally, the results of a regression equation model were compared with the experimental readings. It was found to be in good agreement with the model and the results of the experiment.

Car manufacturers worldwide are switching to hybrid and electric vehicle production models, which are cleaner and more sustainable alternatives. This rapid change situation has also significantly increased the need to maintain and repair these vehicles. Professionals in the motor vehicle maintenance and service industry must be up-to-date on the technological developments that occur with these increases and the critical safety measures on these vehicles. Within the scope of this study, a comprehensive training needs analysis was conducted to determine the vocational education and training needs of those working in the field of hybrid and electric vehicle technologies, and the findings were evaluated. In the study, 30 questions on a 5-point Likert scale were applied to the participants, which was structured under the headings of perception, knowledge, skills, and expectations about hybrid and electric vehicle education. 54 sector representatives, 650 students, and 652 vocational high school teachers and administrators participated in the surveys. Interestingly, in the needs analysis results, all three groups provided a similar response in all questions; that is, they stated the exact needs. Therefore, the training programs to be developed based on these results will meet all three priority stakeholder groups' hybrid and electric vehicle training needs.

In today's global markets, there is a growing demand for high-value composite products. Over the past decade, many countries have shifted their production processes towards these products in order to boost their competitiveness in the global economy. This study aims to examine the current state of the composite industry in Turkey, with a particular focus on Bursa, a major hub for the automotive industry. The analysis includes an assessment of global trade volumes, import-export data, and Turkey's position within this sector. In addition, the study explores current technology and market trends related to composite products. According to the data, Turkey's exports of composite materials increased by 19.48% in 2021 compared to the previous year, reaching 2.7 billion. By calculating the Grubel-Lloyd Index, the study finds that intra-industry trade in Turkey's composite materials product groups is mostly two-way, with a few exceptions. The average index value for composite materials was measured to be 0.6890.

The water, air permeability and thermal resistance of fabrics are important attributes that have a significant impact on the thermal comfort properties of sportswear fabrics in different environmental conditions. In this work, terry and fleece fabrics were developed by varying the fibre content and mass per unit area of fabrics. Moreover, the thermo-physical properties of the developed fabrics, including air permeability, water vapor permeability and thermal resistance, were analysed before and after washing. The multi-response optimization of the thermal comfort properties of knitted fabrics was performed using principal component analysis (PCA) and the Taguchi signal-to-noise ratio (PCA-S/N ratio) to achieve optimal properties. It was determined that the selected parameters (fabric type, finishing, fibre content and fabric mass per unit area) had a significant effect on the thermal comfort properties of knitted fabrics. The PCA analysis showed that 100% cotton terry fabric before washing with an aerial weight of 220 g/m2 had higher air and water vapor permeability value, but a lower thermal resistance value.

The continual increase in world population and lifestyle standards has led to a seminal growth in global energy consumption amounting to about 90% of global energy as fossil fuels supply the transportation and industrial sectors. This led to high emission of greenhouse gases including carbon dioxide, resulting in a substantial depletion of carbon-based resources that could be otherwise used to produce valuable chemicals. In 2013, worldwide energy consumption was 17 TW and is expected to at least double by 2050. This research studied the rational design of porous binary Pt-based nanodendrites as an efficient catalytic system for electrochemical driven water splitting for energy production. Porous Pt-Pd nanodendrites were typically synthesized by the reduction of the metal precursors by L-ascorbic acid (AA) in the presence of PVP as a structure-directing agent under ultrasonication. The Platinum-Palladium (Pt-Pd) was used as a catalyst in water splitting technique for hydrogen production and compared with commercial Pt/C catalyst. Several tests were done on the samples including Cyclic Voltammetry (CV), Linear Sweep Voltammetry (LSV), IT, ET to measure the energy rate and the characterization at the last step.