Scientific Research Communications

Monthly Change of Some Climate Parameters and Biocomfort Status in Ordu Province

Osama B Muragaa ALRABITI, Mehmet Çetin — Mon, 31 Jul 2023 00:00:00 +0000

Biocomfort, which is shaped depending on the suitability of climate parameters, is an important criterion that affects people's comfort, peace, happiness and performance, as well as their health. Therefore, determining suitable areas in terms of biocomfort and using them as a base in the planning of residential areas is of great importance in terms of both human health and happiness and energy efficiency. In this study, suitable areas in terms of wind, temperature, relative humidity and biocomfort, which shape the biocomfort situation in Ordu, which is one of the largest cities in Turkey and whose population is constantly increasing, were determined on a monthly basis. As a result of the study, it has been determined that the wind speed, temperature and relative humidity parameters that are the subject of the study prevent the formation of biocomfort areas to a large extent. While the wind speed causes the formation of uncomfortable areas in January, February, March, April, October, November and December, there are areas where the temperature is below 15 °C in many months, and high humidity causes the formation of uncomfortable areas every month. Suitable areas in terms of biocomfort account for 0.4% of the surface area of Ordu in May, 1.36% in June, 1.45% in July, 1.77% in August, and 8.06% in September. In January, February, March, April, November and December, the entire province is within the scope of uncomfortable areas.

Determination of Boron for Indoor Architecture Plants Used in Indoor Architectural Designs

Adel Easa Saad ABO AISHA, Mehmet Çetin — Mon, 31 Jul 2023 00:00:00 +0000

Air pollution has become a global problem that affects the health of millions of people every year. Among the air pollutants, heavy metals are particularly infamous as they tend to bioaccumulate, can be toxic to human health even at low concentrations, and that even those that are necessary for living things as nutrients can be harmful at high concentrations. Boron (B), a microelement, is both extremely dangerous and important for human health, as it can cause toxic effects when used more or less. As with other heavy metals, the ingestion of B through the respiratory tract is extremely harmful to health. It is very important to monitor the change of B concentration in the air and reduce the pollution level. In order to contribute to the studies in this field, the change of B concentrations in some indoor plants grown in controlled, smoking and traffic environments was determined within the scope of this study. The results of the study showed that camel sole, diphenbahya, drasena, chiefera and yukka species are quite suitable for monitoring the change of B concentrations in the air. It has been determined that the most suitable species that can be used to reduce B pollution in the air are rubber and spatiphyllium.

An Overview of Impact of Agrochemicals on Human Health and Natural Environment

Mohamed Said — Thu, 03 Aug 2023 00:00:00 +0000

Agrochemicals exposure periods and levels, types of agrochemicals used and various environmental condition of the areas are factors for acute and chronic poisoning on human health and environment. Although agrochemicals are the result of modern technology that depends on inorganic fertilizers and pesticides, their continuous use against agricultural pest and disease vectors poses serious threats upon both human health and environment. Overuse of these chemicals have severe effects on human and environment that may lead to immediate and long-term effects. In developing countries, it is very difficult to find out the impact on the environment due to lack of awareness, training, and adequate knowledge for using agrochemicals. Investigating farmer’s awareness of agrochemicals residues and their behaviors regarding application is important in order to reduce human factors that negatively affect environmental safety. This review focuses on a summary of both national and international studies regarding the impact of pesticide and chemical fertilizer residues on nature, both human and environment. The review has revealed the hazardous effects like cancer, neural disorders, and other health related problems and environmental risks associated with agrochemicals exposure.

A Case Study on PV-Aided Net Zero-Energy Building: the Daycare in IKCU

Loic Rebnodji DJANA, Sahin Gungor — Wed, 09 Aug 2023 00:00:00 +0000

At the core of our growing societies, energy supply stands as one of the major concerns today, and it will be an inevitable challenge for our near future. As the nations are looking to find solutions for the transition from fossil fuels – depleting at a high rate – to alternative energy sources, solar energy through PV cells is getting attention as an affordable and easily implemented option especially for power supply in commercial and residential buildings. This work consists in analyzing the possibility to cover the entire energy needs of a building via PV solar cells for the case of a constructed daycare. In this case study, HVAC energy requirement has been calculated by the TS825 standard. The standard specifies a method for calculating the net heating/ventilation energy need and provides the rules for calculating the maximum allowable temperature in buildings. First, dimensions of the investigated building are taken and characteristics affecting the thermal insulation are assessed. Then, other energy needs, mainly lighting and electrical devices, are computed in the analysis as internal electricity needs. The scope of this work extends to the assessment of indoor air quality for occupants of building, which is an important aspect in our case study where the occupants are children. ASHRAE standards 62.1 is utilized for this purpose. The standard specifies minimum ventilation rates and other measures intended to provide acceptable indoor air quality to human occupants and that minimizes adverse health effects. The results are obtained for monthly varying solar exposition in the specified area where the building is located to provide supply for the determined energy demand via solar energy. Finally, monocrystalline PV panel system has been proposed with proper orientation and adequate power potential. Based on the obtained results, as well as the economical aspect, inferences and suggestions are made for improvements.

Vibration Control of Flexible Manipulators by Active Cable Tension

Hayrettin Sen, Murat Akdag — Mon, 31 Jul 2023 00:00:00 +0000

The end point vibrations of the serial manipulator should be controlled during motion or working process. In this study the residual vibrations of the flexible manipulator were controlled with cable tensions. The finite element model was established in ANSYS Mechanical APDL. The open loop and closed loop control simulations were performed under the trapezoidal velocity motion profiles. Zero and three different initial strain values were assigned to the cables. As a result, the end point vibration amplitudes, axial forces of the cables and the bending strain values of the one element near the fixed end were observed in order to define the limitations of the sensors and actuators which will be selected for experimental setup.