Papers by THE IJES Editor
The study developed and implemented an interactive web-based student complaint management system ... more The study developed and implemented an interactive web-based student complaint management system that addressed the challenges faced by students in tertiary institutions. Currently, students struggle with the difficulties of registering complaints and receiving slow responses. The computerized complaint management system provides students with a safe space to express their concerns without the fear of consequences. The design of the system was based on the data flow model and was developed using PHP, JavaScript, HTML, CSS, and MySQL. The MySQL server served as the database management system and Visual Studio Code was used as the integrated development environment. The final outcome of this research is an effective and user-friendly web-based student complaint management software that meets its objectives and provides an efficient solution to the challenges faced by university students.
Extruded polystyrene (XPS) otherwise known as a thermoplastic polymer has a closed cell structure... more Extruded polystyrene (XPS) otherwise known as a thermoplastic polymer has a closed cell structure and is often stronger, with a higher mechanical performance. XPS is a pressed material and is sold in different thicknesses ranging from 2 cm to 10 cm, thus having a weight that varies from 28 to 45 kg/m3 due to the force and pressure exerted on it. In general, XPS material has very low thermal conductivity and is resistant to bending. This material obtains typical values of thermal conductivity between 0.025 and 0.040 W/m•K., which means that it is ideal for surfaces that have to withstand weight, continuous traffic, etc. It is also resistant to moisture absorption and has a homogeneous density. Other characteristics of the material are: good acoustic properties, easy assembly and high durability over time. It should always be kept in mind that the surface where the thermal insulation will be applied must be leveled, cleaned and dried. Primer is applied, before placing the thermal insulation on the surface. Then, XPS boards are placed on the surface, adhering to the corresponding mortar. This paper will deal with different cases of application of XPS tiles in the city of Tirana. A closer look at the resistance of this material from the day of application until today will be analyzed. The results during the observations showed high thermal stability of the material and no mold surface. EPS Expanded Polystyrene, otherwise known by the Dow Chemical trademark name STYROFOAM, is a lightweight product made from expanded plastic beads. It was first discovered by Eduard Simon in 1839 in Germany. EPS in its composition has 95% air and only about 5% plastic. This material is used because of its excellent properties, including good thermal insulation, good protective properties and extremely light weight. EPS is inert in nature and therefore does not result in any chemical reaction. EPS is durable, strong and lightweight and can be used as an insulated panel system for facades, walls, roofs and floors, as floating material in marine construction and as lightweight filler in road and railway construction. Different examples from the city of Tirana, of buildings where XPS and EPS materials are applied, are going to be analyzed, drawing conclusions.
In this paper, the fractional SIR model and fractional stochastic SIR model are given. The relati... more In this paper, the fractional SIR model and fractional stochastic SIR model are given. The relationship between them is obtained by using a probability generating function. The maximum likelihood estimation of the fractional stochastic SIR model and the parameter estimation results of the MCWM algorithm are given. Finally, the parameter estimation results of the fractional stochastic SIR model and integer stochastic SIR model were compared by using British boarding school influenza data and Hong Kong SARS data, results show that the order of fractionalstochastic SIR model value within a certain range, the fitting effect of the original data is better than integerstochastic SIR model, and the parameter estimation error is smaller.
Half-cell potential measurements are quick, low-cost, and virtually non-destructive techniques to... more Half-cell potential measurements are quick, low-cost, and virtually non-destructive techniques to assess the corrosion risk of steel reinforcement in concrete. This study presents a practical application of CORMAP II half-cell potential measurements on existing reinforced concrete (RCC) blocks of the drainage gallery of the power station. The blocks show no signs of deterioration on the concrete surface. Temperature, reference electrode type, and pre-wetting period are some variables that affect the measured values of the half-cell potential. On the equipotential contour map, however, the negative potential area is related to localized corrosion. The numerical criteria disagree with the corrosion condition of steels. Therefore, even if there are no visible indicators of corrosion-related deterioration on the concrete surface, the equipotential contour map is a more reliable technique for detecting localized corrosion than the numerical criterion.
The crystallography of TiAl intermetallic compounds has been studied. It is found that dislocatio... more The crystallography of TiAl intermetallic compounds has been studied. It is found that dislocation and twins will occur in room temperature tensile test which explains the dislocation to be resolved into the Shockley a/2[11-1] and Frank partial dislocation a/6[112-] in TiAl intermetallic compounds. This is complete dislocation a/2[101-] and super dislocation <101] which causes the above two partial dislocations. This is both caused by α and phases according to this study. Furthermore, the many twins are formed in alloy that expresses the activated twins also play an important role as well in TiAl alloys. The Schmid factor will represent the size of dislocation that has different slide one. Meanwhile the CRSS means the precision size of dislocation and twins [1] slide and resolve. Through the critical resolved shear stress the force applied to will be attained which is the main method to proceed in deformation course of TiAl intermetallic compounds.
The Hand Gesture Controlled Robot Car is a project that utilizes hand gestures to control the mov... more The Hand Gesture Controlled Robot Car is a project that utilizes hand gestures to control the movement of a robot car. The project incorporates computer vision technology to detect and interpret hand gestures, which are then translated into commands for the robot car. This innovative method of control allows for a more intuitive and user-friendly interface, eliminating the need for buttons or remote controls. The project has potential applications in entertainment, education, and research, paving the way for new possibilities in human-robot interaction.
Large scale production of liquefied natural gas (LNG) typically employs energy-intensive cascade ... more Large scale production of liquefied natural gas (LNG) typically employs energy-intensive cascade refrigeration cycles such as the Propane Precooled Mixed Refrigerant (C3-MR)cycle. Previous work has focused on improving the energy efficiency of this cascade-type cycle since it can bring significant economic benefits. However, potential benefits associated with changes in the configuration of the mixed refrigerant loop of the C3-MR cycle are usually neglected. This work investigatestwoC3-MR cycle options, based on structural modifications of the MR loop, to see how competitivea modified process will be with abase case process. The chosen configurations are the base case C3-MR cycle with two MR compressors and the modified case cycle with a single compressor. The performance of these two cycles is evaluated using a case study of an LNG plant in Algeria. The analysis uses a proprietary steady state simulator for modelling. It can be found that the specific power of 831.6 kWh/ton LNG and the coefficient of performance (COP) of 1.33 are achieved in base case and the specific power of 981.3 kWh/ton LNG and the COP of 1.28 are achieved in modified case by comparing the two cases. The results of the modified design implemented on the baseload LNG plant give specific power and COP values that are18% smaller and 4% larger than the original design. The results obtained demonstrate that the structural changes does not enable the modified cycle to achieve better energy savings, rather there is a loss compared to the base case C3-MR cycle.
An educational conversational agent (CA) is a dialog system that can interact with students autom... more An educational conversational agent (CA) is a dialog system that can interact with students automatically. Educational CAs are inevitably becoming popular considering their purpose of serving students. Groups of designers are developing different conversational interfaces to help students and educators retrieve information and make decisions. Our preliminary work aims to demonstrate that students' personalities impact the design of educational CAs. Weput the participants into different groups according to their personality dimensions. We designed a prototype of educational CA and investigated the task accuraciesof different personalities. The results showed differences in the task accuracies of four personalities and two pairs of personalitydimensions: intuition VS Sensing and introverts VS Extroverts.Therefore, we confirm that personalities impact users' interaction with educational CAs. Hence, we call on designers to design accordingly for users with diverse personalities. The results of our study may shed a light on the future design of educational CAs when the current CA design methods in the industry are still rapidly developing.
The present study aims to apply new biotechnology for the extraction of the low-grade concentrati... more The present study aims to apply new biotechnology for the extraction of the low-grade concentration of actinides elements by biosorption techniques from Abu Rusheid mylonite rocks. Therefore, Cystoseira osmundacea, Chondrus Crispus, and Palmaria elegant algae were used for this purpose. The biosorption capacity of thorium was close to about (81.66%, 80%, and 77.7%) in Cystoseira osmundacea, Chondrus Crispus, and Palmaria elegans respectively. On the other side, the uranium (U) absorption was not as high as thorium (Th). Holmium is completely absorbed by Chondrus Crispus and Palmaria elegans while europium has vanished by Cystoseira osmundacea. Finally, Cystoseira osmundacea is the best choice for the biosorption of thorium and europium from Abu Rusheid mylonite rocks.
The concentration of greenhouse gases have increased continuously, especially CO 2 gas. It might ... more The concentration of greenhouse gases have increased continuously, especially CO 2 gas. It might cause increase the atmosphere temperature, climate change extremely. By effort of reducing CO 2 concentration to maintain the level concentration of CO 2 in atmosphere is necessary to avoid the global warming. There are many ways to reduce of CO 2 from the atmosphere namely, naturally and human efforts. Photosynthesis used CO 2 and water to make up of tissue building block of plantation. Ocean water and land are also absorbed CO 2 from atmosphere, naturally. Biochar has a high carbon content and recalcitrance can be used as soil amendment, biochar has a mean residence time in the soil on the order of hundred or thousand years. Using adsorbents to absorb CO 2 from industrial released and atmosphere are reduced the concentration of CO 2. Metal-organic framework (MOF) is best candidate to adsorb CO 2 from atmosphere.
The mathematical methods offered by mathematical morphology are mainly oriented towards problems ... more The mathematical methods offered by mathematical morphology are mainly oriented towards problems in image or signal processing and analysis as well as other fields such as artificial intelligence, pattern recognition, and soft computing. Since mathematical morphology is a combined geometric and algebraic framework, its basic operations can be defined on sets and numerical functions whenever their underlying algebraic structure is a complete lattice. The fundamental idea behind the morphological approach is to transform a given set or a function by means of simple structuring elements into another set or function that preserves the essential chracteristics of the source set or function in such a way as to make easier its analysis or interpretation in the case of real world applications. In general, the structuring elements are also sets of smaller extension or functions defined on a finite subdomain with respect to the original domain. In this work we give a brief theoretical foundation of the basic operations in mathematical morphology with emphasis on the algebraic determination and numerical evaluation for the case of real valued functions.
This article deals with the 3D simulation of deep drawing steel DC04 with a thickness of 0.7 mm a... more This article deals with the 3D simulation of deep drawing steel DC04 with a thickness of 0.7 mm along with die load analysis of a deep drawing punch made from tool steel X16CrNiSi25-20. In numerical simulation of deep drawing process Barlat and GMT models were used. The simulation of the technological process is a key factor in engineering production in terms of efficiency, cost savings or inprediction of errors. In this paper, the basic outputs of deep drawing will be evaluated such as effective plastic strain, thinning, equivalent stress and contact pressure of a punch with the use of Simufact forming software.
The objective of this paper is to investigate the effect of cutting tool wear on burr formation. ... more The objective of this paper is to investigate the effect of cutting tool wear on burr formation. When comparing machining, forging, and casting, shearing is mostly known in heavy industry for mass production as a very cheap and fast way to get the desired shape of the product. Recently, however, shearing has also been transferred to light industry to produce electronic components. The appearance of burrs on the cutting edge is usually unavoidable by cutting a part from sheet metal. Burrs not only reduce the accuracy of the product, but also cause further cost increases in the deburring process. In this paper, the effect of the cutting tool on burr formation is investigated by using the experimental approach. The experimental results show that the effect of wear on the functional parts of the cutting tool such as the shear and shearer have a great influence on the formation and size of burrs.
The friction stir welding (FSW) process was applied in two dissimilar materials: 316L stainless s... more The friction stir welding (FSW) process was applied in two dissimilar materials: 316L stainless steel and F82H structural steel, using butt joints to observe its effects on microhardness, mechanical properties and microstructure. Plates of 600x200x4mm 3 were used to measure the microhardness profile on the Vickers HV0.5 scale, following the ASTM E-92 standard. For the tensile tests, samples were manufactured according to the ASTM E8M standard. These tests were carried out in a 10 Tn Universal Instron Machine. The welding parameters were: Joint M1= F82H (AS)-316L (RS) (300rpm and 75mm/min); Joint M2 = 316 (AS)-F82H (RS) (300 rpm and 75 mm/min); Joint M3= F82H (AS)-316L (RS) (400rpm and 100mm/min); Joint M4 =16 (AS)-F82H (RS) (400 rpm and 100 mm/min). Welding tests were performed on a vertical milling machine with 3° head inclination. The microstructure was revealed at optical level and electronic level(SEM), with an EDS assay.to distinguish the SZ, TMAZ and HAZ zones. It was found:As the rotation speed and linear speed of the joint increase, the hardness of the welded joint increases too. The maximum values of hardness and tensile properties (YS, UTS, ε) are presented in the M3 joint. The highest efficiency of the welded joint was 87% and it was presented in sample M3. The maximum impact resistance (27.5J) was also presented in the M3 sample. There was an exchange of materials around the zone (ST), due to the material removal process in addition to the diffusion process at the interface, due to the high temperature in this zone. The microstructure in the zone (ST) of the joints showed: In the F82H steel martensite and ferrite, and in the 316L zone it was totally austenite.
Ground water contamination depends on porosity, permeability and overburden thickness of the geol... more Ground water contamination depends on porosity, permeability and overburden thickness of the geological formations. The ability of the subsurface rock to filter impurity before percolating into aquifer as a measure of overburden materials have been examined in this study. Vertical electrical sounding method using schlumberger array was employed in this study the result was used in calculating the longitudinal conductance and consequently the protective capacity. The study discovered six geo-electric layers of Top soil, Clayed soil, Lateritic soil, weathered layer, Fractured Basement and Fresh Basement in the study area. The top soil is low resistivity between 0.8 Ωm to 33.2 Ωm and thickness of 0.2 m to 2.4 m. Clayed soil underlay Top soil; the resistivity is between 2.6 Ωm to 81.8 Ωm with 1.4 m to 43.9 m thickness. Lateritic soil: a product of weathering occupy the third layer in lithological sequence in some places its resistivity is between 77.2 Ωm and 422.2 Ωm and thickness between 0.8 m and 26.3 m. Weathered layer resistivity is between 6.4 Ωm to 740.6 Ωm and thickness of 3.0 m to 97 m. Fractured basement and fresh basement is the last observable layer in the area. Fracture zone resistivity ranges between 9.5 Ωm to1902.6 Ωm. The result revealed that 34% of the study area has poor overburden bearing capacity, 16% is weak while 38% and 12% area have moderate and good overburden thickness respectively and hence 50% of the study area have adequate protection from underground water contamination, their geological formation comprises of migmatite-Gneis, Older Granite and partly Charnokite Bachite, these geological features offer high protective material such as clay which is believed to have been formed from weathering of feldspar mineral present in Charnockitic rocks.
Ground water contamination depends on porosity, permeability and overburden thickness of the geol... more Ground water contamination depends on porosity, permeability and overburden thickness of the geological formations. The ability of the subsurface rock to filter impurity before percolating into aquifer as a measure of overburden materials have been examined in this study. Vertical electrical sounding method using schlumberger array was employed in this study the result was used in calculating the longitudinal conductance and consequently the protective capacity. The study discovered six geo-electric layers of Top soil, Clayed soil, Lateritic soil, weathered layer, Fractured Basement and Fresh Basement in the study area. The top soil is low resistivity between 0.8 Ωm to 33.2 Ωm and thickness of 0.2 m to 2.4 m. Clayed soil underlay Top soil; the resistivity is between 2.6 Ωm to 81.8 Ωm with 1.4 m to 43.9 m thickness. Lateritic soil: a product of weathering occupy the third layer in lithological sequence in some places its resistivity is between 77.2 Ωm and 422.2 Ωm and thickness between 0.8 m and 26.3 m. Weathered layer resistivity is between 6.4 Ωm to 740.6 Ωm and thickness of 3.0 m to 97 m. Fractured basement and fresh basement is the last observable layer in the area. Fracture zone resistivity ranges between 9.5 Ωm to1902.6 Ωm. The result revealed that 34% of the study area has poor overburden bearing capacity, 16% is weak while 38% and 12% area have moderate and good overburden thickness respectively and hence 50% of the study area have adequate protection from underground water contamination, their geological formation comprises of migmatite-Gneis, Older Granite and partly Charnokite Bachite, these geological features offer high protective material such as clay which is believed to have been formed from weathering of feldspar mineral present in Charnockitic rocks.
This work deals with the assessment of the quality of the cutting surface using microscopic analy... more This work deals with the assessment of the quality of the cutting surface using microscopic analysis. In the theoretical part of the thesis, the knowledge related to electrical sheets produced by different manufacturers is presented. A very important parameter of cutting technology is the cutting gap. It has a major influence on the formation of the cutting surface and its shape. It also influences the actual hardening of the material during cutting and the distribution of the individual zones on the cutting surface. The experimental part of this work is focused on the measurement of the plastic shear zone, which is one of the main parameters for evaluating the quality of the cutting surface. It is characterized as the ratio of the shear zone thickness to the fracture zone thickness.
The second is to investigate the effects of temperature on the osmotic coefficients of these two ... more The second is to investigate the effects of temperature on the osmotic coefficients of these two electrolyte solutions from 60 to 100°C by means of the optimization method of curve fitting to the results from the linear rule mentioned above. Acquire the osmotic coefficients of both of NaCl and KBr solutions as a function of temperature within 60 to 100 °C with the satisfying results.
Sweaden agriculture is still the choice of most people, especially those who live on small island... more Sweaden agriculture is still the choice of most people, especially those who live on small islands. The small island in Southeast Sulawesi holds a large amount of potential, especially the potential of forest resources which, if managed wisely, can provide welfare for people who live around the forest, especially swidden agriculture who cultivate forest land with local wisdom that can guarantee the sustainability of the forest ecosystem also means the survival of human on the island. In fact, the existing forests have suffered a lot of damage due to exploitation for the purpose of opening up plantations and mining land and the occurrence of illegal logging by a number of irresponsible persons. Slowly, forest destruction will threaten the existence and reduce the access of Ladangng farmers to the forest which has been their life support. This research will be carried out in Kulisusu District North Buton Regency namely on Ereke which is a small island in Southeast Sulawesi Province, respondent samples will be taken in all districts. The analytical method used is descriptive qualitative analysis by presenting the data obtained in the form of a frequency distribution table.
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Papers by THE IJES Editor