Cutting fluids are difficult and expensive to recycle. These drawbacks mentioned can be reduced or eliminated by performing the cutting operations with minimum quantity lubrication or without using any cutting fluid. In this study, the effects of different cutting parameters on performance characteristics are studied empirically during the drilling of Al7075. The work piece surface roughness and the temperature changes due to the incurred heat at the cutting process are taken as performance outputs. In the experiments, HSS tools with a diameter of 8 mm and an angle of 118o were used. Minimum quantity lubrication (MQL), compressed air and dry processing (without the usage of any cooling liquid) techniques are used as the applied cooling technique. In the processing technique with MQL, the cooling liquid is sent pulverized on the interface between the work piece and the tool. Boron oil-water emulsion is used as the cutting liquid. As a result of the experiments, it is determined that better results are achieved with the MQL technique than with other cooling techniques. The best surface roughness is achieved at 20 m/min cutting speed and 0.1 mm/rev feed rate

The robot arms often follow a certain trajectory depending on the type of end effector with functions of spray-painting, arc welding, bonding or machining etc. Therefore, trajectory-tracking control is a very important issue in robot arm applications. Also, the robot must be able to follow the determined trajectory stably under the influence of external forces or machining forces it encounters in its operations. In this study, a Model Predictive Control (MPC) for trajectory tracking control of a 2 Degrees of Freedom (DoFs) Selective Compliant Assembly Robot Arm (SCARA) under an external force acting to the tip of the robot along the trajectory was performed. The effectiveness of the MPC method used has been demonstrated by simulation applications. According to simulation studies, successful results were obtained.

Friction stir welding (FSW) is the most widely used solid-state joining method for sheet and plate-like materials, valued for being a highly adaptable, environmentally sound, and energy-efficient process. The literature has repeatedly shown that FSW is a reliable joining technique for high-demand technological applications, particularly for high-strength aluminum and titanium alloys used in aerospace, which are difficult to join with traditional fusion welding methods. To describe the microstructural changes caused by solid-state FSW, many studies analyze mechanical parameters of FSW joints, including tensile strength, bending, torsion, elasticity, and fatigue responses. In recent years, the push to expand FSW's use, broaden the range of compatible alloy systems, and improve the resulting mechanical properties has led to significant advancements in this joining method. Accordingly, this review study provides a comprehensive investigation into the methodology and the materials relevant to this specific field.

Değişen ve gelişen dünyada kurumların daha rekabetçi ve sürdürülebilir yönetim süreçlerinde karar verme oldukça önemli bir yer edinmiştir. Son 80 yılda tamamen sistemli bir disiplin ve model halini alan karar verme bilimi tüm organizasyon ve yaşam alanlarına yön vermeye devam etmektedir. Tüm şirketler için hayati bir öneme sahip olan ve gittikçe daha da önem kazanan çalışan etmeni ve çalışan seçimi de karar verme modelleri ile yönetilmeye başlanmıştır. Bu çalışmada öncelikle karar verme modelleri hakkında bilgiler sunulmuştur. Daha sonra Çok Kriterli Karar Verme (ÇKKV) modellerinden TOPSIS yöntemi kullanılarak iş başvurusu yapan 8 adaydan 4 kişilik mülakat listesi oluşturulmuştur. Son olarak seçilen adaylar içinden en uygun adayı tercih etmek için VIKOR yöntemi uygulanmış ve başarılı sonuçlar elde edilmiştir.