Papers by Keyword: Analysis

Abstract: In the present study, a solid biofuel based on Olive Pomace Waste (OPW) is manufactured in order to estimate the energy for heating water. A mechanical hydraulic press is constructed in order to create the block of OPW biofuel. To proceed, the standard form is burned to heat water in a tank where a thermocouple is placed to estimate the heating energy created by OPW blocks. Then, the standard OPW blocks are compared experimentally with other mixed biofuel blocks such as, waste Beeswax, oak charcoal, dry olive leaf and waste wood sawdust. It is shown that the standard OPW blocks could increase the temperature of 3 Liters of water to 34 °C whereas with the modified OPW mixed with other constituents temperatures up to 65 °C can be reached.

Abstract: The study investigated the structure of the integrated solar and hydraulic jump enhanced waste stabilization pond (ISHJEWSP) variables. Also, to determine the cluster of the most important variables that account for the performance of the ISHJEWSP using principal component analysis (PCA). Three sets of experimental ponds were constructed with varying locations of point of initiation of hydraulic jump. Wastewater samples collected from the inlet and outlet for varying inlet velocities were examined for physicochemical and bacteriological characteristics for a period of nine months. The Pearson’s R-matrix and KMO statistic were used in evaluating the structure of the variables. Consequently, the variables of temperature, pH, algae concentration, solar radiation, and locations of the point of initiation of hydraulic jump were subjected to PCA. Two components had eigenvalues above the Jolliffe’s criterion and in combination explained 90.66% of the total variance. The inflexion of the scree plot justified the retained components. The analysis after rotation revealed that the parameters of pH, temperature, solar radiation, and algal concentration loaded highly to component 1. This underscores the precedence of ambient climatic conditions, alongside the state of the wastewater in general, to the inlet velocity and location of point of initiation of hydraulic jump.

Abstract: The article presents a systematic analysis and simulation of the process of destructive hydrogenation of deasphalted oil. The process of thermoregeneration of spent zeolite and the surface - acid properties of CaA zeolite catalysts are also studied. It has been established that such patterns that allow predicting their influence and to regulate the quality of the hydrogenation obtained on one or another form of the catalyst obtained from the studied factors and catalysts. In addition, the obtained data can be used in the search for the optimal process modes of the process under consideration on the specific form of the catalyst.

Abstract: Plastic forming, in many cases, includes the drawing of hollow cylindrical products as the main operation. For the manufacture of such products, round blanks are used as semi-finished products. However, during the blank production from strips or tapes, their geometry causes a very significant metal loss. A very effective way to reduce metal loss is to replace round billets with square ones. The use of square blanks gives an additional increase in the height of the products. In this regard, the article investigates the drawing of a square blank into a cylindrical die. The research was carried out on the basis of the analysis of experimental work and computer modeling. According to the results of the research the rational ratios of the geometric dimensions of the tool and workpieces are found.

Abstract: Modern scientific foundation for the unification of methods of control and analysis of structural features and practically important properties of various metallic and non-metallic polymeric, ceramic materials are considered. Within the framework of improving materials' control and analysis methods through taking into account the effects of chemical elemental composition on their structure and properties, a new fundamental approach was developed. This method, unlike others, is applicable to both metals and non-metals, and implies considering the impact of both the composition and the type of chemical bonding on structure and properties of materials. This was done on the basis of a unified multilevel classification of structure of metallic and non-metallic materials, the use of a unified model and system of chemical bonds and compounds, which allowed evaluating the effect of mixed types of chemical bonds on characteristics of their multilevel structure and properties.

Abstract: The purpose of this paper is to design and develop a formula student frame, according to the SAE regulation. The content of the paper contains a series of results obtained from frame loads at torsion and bending, using FEA (Finite Element Analysis). It should be mentioned that this design is a preliminary one, a prototype. After its construction, we will perform laboratory tests and begin the optimization processes. The ultimate goal is to get a frame that meets all the technical-economic requirements and to obtain competiton frame.

Abstract: There are a lot of dental implants kit designs [1, 2, 3]. All of them are based on a pin or a screw either cemented or osseointegrated into the human jaw. This paper makes a study on the shape the pin or screw dental implant should have. Presented theoretical research was performed using DEFORM 2DTM software simulations, [4]. There were studied several shapes of the dental implant, both for pins and screws. The studied shapes were, basically: cylindrical, conical, ogival and pointed. The criterion for analysis was the effective stress into the jaw bone during the insertion. As a conclusion, the optimal shape of the dental implant depends on the real case, being a customized shape depending on the current conditions of insertion.

Abstract: This study aims to determine the content of n-alkanes in the sediment around the coast of Makassar using the MOPI (Marine Oil Pollution Index) indicator. The method includes the sediment sampling from nine different stations with the Phleger Corer Sampler in gravimetric analysis to identify the concentration of organic material extract and aliphatic fraction. To identify the characteristic of n-alkane hydrocarbons, gas chromatography of mass spectra method was applied. The results of the aliphatic fraction (F1) analysis of the coastal sediments which were contaminated with low biogenic - petrogenic have a MOPI scores of 3, which is supported by a high UCM (Unresolved Complex Mixture) and n-alkane identified between C₁-C₄₄. While the sediments that come from natural processes, pure - biogenic and biogenic, have MOPI scores ​​between 1 and 2. This is supported by the chromatogram profile with an area of ​​UCM generally smaller by n-alkanes identified between C₁₅-C₅₈

Abstract: The following study involves designing of a go-kart chassis using CAD and CAE tools. The chassis is the supporting base for every automobile and chassis is subjected to various loads due to self-weight, acceleration, braking, bumps and cornering. CATIA Software was used for designing the CAD model of the chassis and ANSYS software was used for the FEA analysis of the chassis under different loading conditions. The calculations of these forces due to impacts are required to design a functional chassis for go-kart and having an adequate stiffness to avoid any vibration or resulting resonance. Ten mode shapes and natural frequencies are studied for vibration characteristics using Modal analysis in ANSYS. For impact analysis the loads in terms of gravitational acceleration are applied for the front, side and rear impact as 4g, 2g and 2g respectively and the results are compared to get the best material among the four selected materials AISI 4130, AISI 1080, AISI 1020 and AISI 1026.

Abstract: The reuse of treated wastewater can reduce the water deficit in Saharan areas, especially in Ghardaia. The M'Zab wastewater treatment plant (WWTP) is designed to treat wastewater by the natural lagoon system, and to reuse the treated water for irrigation of agricultural perimeters in order to contribute to sustainable development efforts in the region. Indeed the present work aims to search for the study of the possibility of reusing treated wastewater of M 'Zab in irrigation, to do this, we established and followed the evolution of the various physical-chemical and bacteriological analysis for two years (2013-2015), to study the effectiveness of biological treatment in the reduction of wastewater pollution, and then compare the results of treated water with national and international standards in the field of 'irrigation. The results showed that the treated water is considered as poor quality water is not usable only for some salt-tolerant species and on well-drained soil and leached, require additional treatments for ensured the quality of this precious resource.