Journal of Brilliant Engineering (BEN)

Aysenur Keles Ozlem Baran Gelengul Urvasizoglu Mert Ataol Yasar Totik Umit Ertas İhsan Efeoğlu

DLC films have high biocompatibility. But due to low adhesion, the element must be doped. Therefore, in this study, the high biocompatibility Ta element was doped into DLC film and optimum parameters for the adhesion of Ta-DLC films were determined. The Taguchi experimental system was used to determine the optimum parameters. Ta target current, substrate bias voltage and duty cycle were selected as variable parameters. The deposition was performed with HiPIMS-CFUBMS system. Ta-DLC films were grown on Ti6Al4V substrates using Taguchi L9 34 orthogonal experimental system. The optimum deposition parameters for critical load of Ta-DLC films are 3A, -80V and %5 for Ta target current, substrate bias voltage and duty cycle, respectively.

https://doi.org/10.36937/ben.2020.001.001

Hilal Koç Polat Dilruba Geyikoğlu Bülent Çavuşoğlu Mehmet Ertuğrul

It is unavoidable to decrease the thickness of the substrate in order to obtain enough flexibility. Decreasing the height of the substrate lowers the gain of antenna and its bandwidth. Thus, it is challenging to provide operability for the flexible materials and it requires new approaches. This paper is shown that the using nano silver paste for the designed antenna causes better return loss rates (S11) and bandwidth. Also, the effect of sintering temperatures on the response of the antenna is analyzed for the range of 150 ° C to 350 ° C. The highest resonance frequency and the lowest return loss are observed at 350 ° C in this range. The SEM images of the antenna surfaces show that the nanoparticles in the paste group together with increasing sintering temperatures. When compared to the perfect conductor silver, better return loss and bandwidth are obtained.

https://doi.org/10.36937/ben.2020.001.002

Ferhat Yuna Şeyma Emeç Özge Albayrak Raziye Kılıç Bilal Usanmaz Burak Erkayman

In today's world, the fact that information applications have become an indispensable part of life with the effect of the developments in information technologies has led to a huge rate of data production and usage. As a result of this, the need for data centers has increased. Although Turkey is a country with advantages that can play a leading role in the field of data centers in the region where it is located, it has some disadvantages as well as these advantages Based on these disadvantages, natural disasters index, climate index, energy index, accessibility index and human capital and life quality index (HCLQ) of 81 provinces are taken into consideration for data centers location selection in Turkey. Criteria weights were determined by fuzzy DEMATEL (The Decision Making Trial and Evaluation Laboratory) method in the problem solving and alternatives were listed using EDAS (Evaluation based on Distance from Average Solution) method. According to the results obtained, a suitable alternative for the data centers location selection was found to be Istanbul.

https://doi.org/10.36937/ben.2020.001.003

Rafael Marín Galvín

Carbon footprint is a measure used to quantify greenhouse gases (GHG) emissions associated with organizations, events or activities or with the life cycle of a product to determine its contribution to climate change, being expressed in kg of CO2 equivalent. GHG emissions can be direct or indirect, derived last ones from energy consumption. In the case of the urban water cycle (which uses 3% of the total energy consumption in Spain), the emissions come mainly from the use of energy. Thus, to estimate this type of emissions it can be taken into account both, energy consumption and emission factors, these last ones which associate quantity of energy consumed and quantity of gases emitted. This work presents the result to calculate the carbon footprint related to urban water cycle of Córdoba in the last six years: 4,225.541 T of CO2 eq/year are emitted, at a rate of 12.92 kg of CO2 eq/year per inhabitant, and 0.176 kg of CO2 eq. per m3/water managed by the company. If we compare this result with the obtained in our last studied period (2012-14) which reached a value of 5,015.80 T of CO2 eq/year (-15%) and a rate of 15.2 kg of CO2 eq/year per inhabitant, we can conclude that the company has shown a relevant positive environmental balance.

https://doi.org/10.36937/ben.2020.001.004

Bahadır ÖZKILBAÇ Tevhit KARACALI

FPGAs have capabilities such as low power consumption, multiple I/O pins, and parallel processing. Because of these capabilities, FPGAs are commonly used in numerous areas that require mathematical computing such as signal processing, artificial neural network design, image processing and filter applications. From the simplest to the most complex, all mathematical applications are based on multiplication, division, subtraction, addition. When calculating, it is often necessary to deal with numbers that are fractional, large or negative. In this study, the Arithmetic Logic Unit (ALU), which uses multiplication, division, addition, subtraction in the form of IEEE754 32-bit floating-point number used to represent fractional and large numbers is designed using FPGA part of the Xilinx Zynq-7000 integrated circuit. The programming language used is VHDL. Then, the ALU designed by the ARM processor part of the same integrated circuit was sent by the commands and controlled.

https://doi.org/10.36937/ben.2020.001.005