Authors:Tefide KİZİLDENİZ Abstract: Leaf area measurements in the field are very difficult to determine the yield. Use of the mobile application has come to the fore due to its practical use and ease of transportation. Therefore, in this study, the ease of use and accuracy were tested by determining area of leaf with an automatic leaf area meter and a mobile application called 'PETIOLE'. The leaf area of alfalfa plants (Medicago sativa L. cv Nimet) grown in the field, and measured in the field with the 'PETIOLE' mobile application and in laboratory conditions with automatically leaf area measurement device was measured. The automated leaf area meter mean for total leaf area was 61.65 ± 3.50; meanwhile the mean for the PETIOLE App assessment was 61.56 ± 3.15. As a result, the PETIOLE app measures the area of each leaf separately, more quickly and efficiently than before, particularly in the field. PubDate: Sun, 01 Jan 2023 00:00:00 +030
Authors:Hülya ÖZKOÇ; Cemre Gizem SAĞLAM, Ayşenur USLU Abstract: Water treatment plants are the most important facilities used to provide potable water to settlements and clean water. These facilities raise water quality to the desired standards physically, bacteriologically, and chemically. A conventional drinking water treatment plant consists of aeration, coagulation, flocculation, settling, filtration and disinfection units. Each of these units has its hazards. For this reason, if adequate safety precautions are not taken, the possibility of plant employees being, exposed to these hazards will be quite high. Risks arise as a result of exposure to hazards in every workplace. It is important to analyze these risks and determine the precautionary priorities and to ensure health and safety in the workplace. In this study, the hazards that employees may be exposed to in a drinking water treatment plant in the Eastern Black Sea region were determined. All the units of the facility were examined and all risks that would affect the employees and the working order of the facility were calculated with the matrix method. After the risk levels have been determined, in the study the risks named as unacceptable and as to be considered are presented and the precautions to be taken in the facility are listed to be protected from these risks. As a result of the study, the importance of personal protection measures and safety culture, especially collective protection measures, was emphasized for the employees in such workplaces containing complex units. PubDate: Sun, 01 Jan 2023 00:00:00 +030
Authors:Volkan Murat YILMAZ; Kenan YILDIZ Abstract: In this study, the effect of mechanical activation and Ca(OH)2 additive on alumina production by microwave leaching from diasporic bauxite in Gaziantep – Islahiye region were investigated. In microwave leaching studies with NaOH, parameters such as microwave power, Ca(OH)2 addition, liquid/solid ratio and leaching time were investigated for both original diasporic bauxite and 60 min activated diasporic bauxite. In microwave leaching with Ca(OH)2 additive, while the aluminum extraction from original ore was 48.59% and it is 78,51% from the activated ore at 1200 W microwave power, 20 as liquid/solid ratio, 30 min of leaching time. Finally α-Al2O3 was obtained by precipitation and then calcination. According to the results obtained in this study, it was seen that an acceptable percent of alumina could be obtained by microwave leaching in atmospheric conditions after mechanical activation and Ca(OH)2 addition from diasporic bauxite in Islahiye region. PubDate: Sun, 01 Jan 2023 00:00:00 +030
Authors:Sinan AKISKA; Elif AKISKA Abstract: Bağırkaçdere Pb-Zn deposit is located approximately 10 km northeast of Edremit (Balıkesir). The deposit has been operated continuously for the last 30 years. The metamorphic units (schist, metasandstone, and marble lenses) and ore-alteration rocks are outcropped in the region. The faults in the region are mostly NW-SE oriented and mineralizations are observed in accordance with these directions. In this study, the ore zones cut in 19 boreholes and their %Pb and %Zn values were modeled. Among the ore zones detected in the subsurface environment, the intersected areas of %Pb and %Zn above the cutoff grades were determined (26,337,500 voxel) and an interpreted gallery was drawn using these parameters. In this modeling study, Inverse Distance Weighted interpolation algorithm was used and the parameters of the modeling study were tested. The optimal parameters for Pb% are 3 both as power value and neighbor value, while the optimal parameters for Zn% are 3 and 2 as power value and neighbor value, respectively. Mean Absolute Error is 2.00 and Root-Mean-Square Error is 4.25 for Pb%, while Mean Absolute Error is 1.14 and Root-Mean-Square Error is 2.95 for Zn%. With this study, the location and the direction of an ore adit, planned for opening in a mining area, can be estimated. In addition, underground mining operations can be redesigned using these modeling studies during work in case of any important financial changes such as fluctuations in metal prices or other increasing costs. PubDate: Sun, 01 Jan 2023 00:00:00 +030
Authors:Okan KON; İsmail CANER Abstract: In this study, optimum insulation thicknesses are calculated for three different flat-surfaces which are navigable terrace roof; stone-covered and soil-covered un-navigable flat roof types. The outdoor temperature, the value of January, which is the coldest month in winter, and the value of July, which is the hottest month in summer, and solar radiation, are considered together. Flat roof surfaces are considered to be stone-covered and soil-covered black painted and marble. Firstly, solar-air temperatures were determined for the winter and summer periods. Then, optimum insulation thickness calculations are made using life cycle total cost analysis. Extruded polystyrene (XPS) is accepted as the insulation material. Natural gas is used in winter and electricity in summer as an energy sources. The optimum insulation thicknesses have been calculated for five climate zones and three different roof types based on the TS 825. Then the results are compared. As a result, the optimum insulation thickness calculated considering the hottest and coldest months of the year was determined as 0.128 m in the 5th climate zone in roof one with the highest value, and as the lowest value with the 0.052 m in the 1st climate zone for roof three. PubDate: Sun, 01 Jan 2023 00:00:00 +030
Authors:Dıckson Davıd OLODU; Marvellous ABRAHAM, Jackson JESUOROBO, Odezi Oghenerukevwe AKIAKEME Abstract: Buildings with staircases have grown significantly as a result of improvements in building or home structures, and the strain associated with carrying items cannot be ignored. High levels of strain are related to the movement of loads along staircases, particularly in high-rise buildings. In order to make it simple to transfer large goods up and down stairs, this project concentrated on designing and building an electric-powered staircase climbing trolley from locally sourced materials. Everyday needs in our society drive the necessity for such a system. This robotic trolley is also employed to reduce the strain associated with lifting while on level ground and over a staircase. Given this, the project aims to design, build, and test the functionality of an electric-powered stair climbing trolley that can transport items up and down the stairs as well as on flat surfaces and even rugged terrain. The trolley uses a triple interlink wheel configuration that makes it simple to move things. When comparing the designed and constructed motorized trolley machine established in this work to the hand trolley, whose performance efficiency ranges from 50% to 60% as explored in previous literature, the motorized trolley machine performed 87% more efficiently. Moving products up and down a staircase can potentially be solved with the help of a motorized trolley that was designed and manufactured specifically for this purpose. PubDate: Sun, 01 Jan 2023 00:00:00 +030
Authors:Recep Kadir SİVRİ; İbrahim KELES Abstract: Nowadays, there are very rapid developments especially in automobile technology. In buses and trucks, which are both automobiles and heavy-duty vehicles, the disc brake system is a system that slows down and stops the vehicle's wheel rotation. When braking to stop the vehicles, a heat is generated and the system can easily disperse because it is open to the atmosphere. Manufacturers try to overcome this situation with short-lived and heavy steel discs. Transient thermal and structural analysis of disc brake rotor disc made of different materials in a real bus brake assembly is to analyze the thermomechanical behavior under braking conditions with the help of FEM based ANSYS software student license. In order to analyze the stresses and strains occurring in the disc brake, after applying some boundary conditions, the deformation, shear stress, elastic strain and equivalent stress values of the disc were taken. The strength comparison of the disc brake system was made by using different materials in terms of design. PubDate: Sun, 01 Jan 2023 00:00:00 +030
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