Effect of Geo-Grid Depth in Roads Cross-Section on Reducing Pavement Rutting

Pavement structures cover vast areas of urban cities and non-urban roads and play a key role in daily commuting functionality and economic development; therefore, they must be conserved against any distress. The rutting problem, being a major distress to the pavement structure, must be solved and dealt with in order to preserve its value. One way of solving this dilemma is by using geo-grids within the pavement structure. A geo-grid is a synthetic material usually made from polymers with different thicknesses and stiffnesses. This paper investigates the effects of geo-grids on reducing the rutting occurrence through adding a layer of geo-grid with certain properties at different levels of the pavement structure. We also investigate, the result of the added geo-grid material to the developed vertical stresses within the pavement cross-section. This investigation is conducted by constructing a 3-D finite elements-based (FE) model of a pavement cross-section using ANSYS software; student version R1 2021. The FE-based model is validated by comparing its numerical predictions with the experimental results acquired from an accelerated large-scale paved model. The results show that the deeper the geo-grid is positioned, the more significant the rutting resistance is observed due to the stiffness of the geo-grid bearing the tensile force until a certain depth. Moreover, noticeable stress reduction is seen in the developed vertical compressive stresses below the loading area resisted by the geo-grid.

Tensile and flexural behaviour of graphite filler particles and pineapple leaf fiber (palf) reinforced polymer composites

New composites materials are developed to meet the demand for medical devices, vehicles, protective equipment, sporting goods, etc. In present investigations, the effects of graphite filler particles in the epoxy were studied separately by preparing epoxy with 5 and 10 vol.% of graphite filler particles composites by hand layup technique. Further, the combined effect of graphite filler particles and pineapple leaf fibers (PALF) on the mechanical behaviour of epoxy composites was studied by preparing epoxy with 5 vol.% of graphite -30 vol.% of PALF and epoxy with 10 vol.% of graphite -30 vol.% of PALF composites. Prepared composites were subjected to evaluating various mechanical properties like tensile strength, elongation, and flexural strength as per ASTM standards. By adding graphite filler particles and PALF fibers tensile, and flexural strength were improved with a slight reduction in the percentage elongation. Further, these conventional results were validated by FEM analysis using MSC Patran and Nastran Student Version.

Comparison of empathy with patients between first-year and last-year medical students of Tehran University of Medical Sciences

Purpose This study was conducted to assess the developmental factors of empathy among medical students of Tehran University of Medical Sciences (TUMS). Methods To assess the empathy levels, 42 first-year and an equal number of last-year medical students were randomly selected. They answered a questionnaire including the medical student version of the Jefferson Scale, demographic, and some related variables. Statistical analyses were performed using the Chi-square test, T-test, univariate, and multivariate regressions. Result The study population consisted of 51 (60.7 %) men and 33 (39.3 %) women with a mean (SD) age of 22.24 (4.10) years. The Jefferson score was 110.19 ± 13.61 and 103.52 ± 20.00 in first- and last-year medical students, respectively. Moreover, medical students who completely passed at least one of the considered empathy courses of the TUMS curriculum had higher empathy scores compared to their counterparts (109.83 ± 15.54 vs. 103.68 ± 19.02). There was no significant association between empathy and gender, self-experience of illness, marital status, family history of chronic disease, and parents’ education (all P-values > 0.05). After adjusting for the effects of confounders, the empathy scores were significantly associated with the academic year level (p = 0.04), level of interest in medicine (p = 0.001), and passing the empathy courses (p = 0.04). Conclusions The data provided from a top Iranian medical school indicated that the academic year level, level of interest in medicine, and passing the empathy courses were significantly associated with the empathy level. Further studies are recommended.

Developing and Testing the Validity and Reliability of the Brief Adolescent Respiratory System Health Assessment Scale-Student Version in a Chinese Sample

Objectives: To develop a Brief Adolescent Respiratory System Health Assessment Scale-Student Version (BARSHAS-SV) and test the validity and reliability of the scale.Methods: Considering common respiratory system diseases and respiratory system symptoms as a theoretical basis, researchers developed a Brief Adolescent Respiratory System Health Assessment Scale-Student Version-I (BARSHAS-SV-I). After six medical experts reviewed the BARSHAS-SV-I, and six adolescents tested the BARSHAS-SV-I, researchers developed an updated BARSHAS-SV-II. Researchers randomly selected two middle schools in Baoding, China. Thousand twenty nine valid questionnaires were recovered. Researchers evaluated the validity and reliability of the scale and obtained the final version of the scale (BARSHAS-SV). The exploratory factor analysis (EFA) and the confirmatory factor analysis (CFA) were used to evaluate the construct validity of the scale. The content validity index (CVI) was used to evaluate the content validity of the scale. The Cronbach's α coefficient and the mean inter-item correlation coefficient (MIIC) were used to assess the reliability of the scale.Results: BARSHAS-SV Cronbach's α = 0.910, content validity = 0.941, and factor cumulative variance contribution rate = 64.047% conducting EFA. Conducting CFA, Chi square value (χ2) = 233.806, degrees of freedom (df) = 106, Chi square value/degree of freedom (χ2/df) = 2.206, root-mean-square error of approximation (RMSEA) = 0.063, normed fit index (NFI) = 0.922, goodness of fit index (GFI) = 0.917, Tueker-Lewis index (TLI) = 0.942, comparative fit index (CFI) = 0.955, incremental fit index (IFI) = 0.956. BARSHAS-SV consisted of 4 dimensions and 17 items. Four factors were as follows: Factor 1, mild respiratory system diseases (Cronbach's α coefficient = 0.781); Factor 2, severe respiratory system diseases (Cronbach's α coefficient = 0.829); Factor 3, respiratory system symptoms (Cronbach's α coefficient = 0.835); Factor 4, treatment and recovery of respiratory system diseases (Cronbach's α coefficient = 0.845).Conclusions: BARSHAS-SV is a valid and reliable method that can be applied to assess adolescent respiratory system health status. BARSHAS-SV may help teachers and medical staff in schools to quickly and conveniently evaluate the adolescent respiratory system health status and identify respiratory issues.

Simulation of CO2 Gas Adsorption Process Flow at Cyclone Gas Outlet in Palm Oil Mills Using Computation Fluid Dynamic Simulation

Cyclone separator is equipment used to control emissions from gas flow in industrial processes. The principle of removing particulates from the gas flow in this tool is to use the centrifugal force. The centrifugal force generated from the rotating flow will make dust particles wasted into the cyclone wall where the dust will then fall into the hopper. Adsorption is a series of processes for the accumulation of a substance (adsorbate) on the surface of another substance (adsorbent). Adsorption can occur because of the energy on the surface and the attraction force on the surface. This study aims to obtain a good CO2 adsorption efficiency from modifying the cyclone separator using an adsorption column, analyzing the CO2 gas adsorption process produced from the biomass system at the utility unit boiler station at the Palm Oil Mill (PMO) using a modified cyclone. This simulation was carried out using the Autodesk Inventor Professional 2017 (Student Version) application for the descripction of the tool as a preprocessor and Ansys 2019 R3 (Student Version) applications as a processor and post processor. The variations that were applied included the adsorption column bed height of 3100 mm and 4650 mm, respectively, CO2 gas flow rates of 10, 12.5, 15, 17.5, 20, 22.5 dan 25 m/s and mass loading 0,001 kg/s. The results obtained in the most optimal modification of the cyclone separator are at a bed height of 3100 mm with the highest adsorption percentage 93.437%, the highest flow 91.974% with a pressure drop of 1000 Pa.

Pengaruh Electronic Word of Mouth (EWOM) Terhadap Brand Image, Trust dan Keputusan Berkunjung ke Kampung Tridi Malang

Electronic word of mouth (EWOM) is quite effective in increasing the decision to visit tourist destinations. Indirectly, electronic word of mouth has an important role in forming a brand image, so there is a need for a good brand image to increase trust so that tourist visits can increase. The purpose of this research are to (1) to analyze the effect of the Electronic Word of Mouth on brand image, trust and the decision to visit in Kampung Tridi Malang, (2) to analyze the influence of brand image on the decision to visit in Kampung Tridi Malang, and (3) to analyze the effect of trust on decisions. visited Kampung Tridi Malang. This study uses SEM (Structural Equation Modeling) analysis using the SmartPLS 3.0 student version software. The data collection instrument used a questionnaire with 100 respondents. The distribution of questionnaires was carried out by purposive sampling to domestic tourists. The results of this research indicate that 1) electronic word of mouth has a significant effect on brand image, (2) electronic word of mouth has a significant effect on trust, (3) electronic word of mouth has a significant effect on visiting decisions, (4) brand image has a significant effect on trust. decision to visit and (5) trust has a significant effect on the decision to visit 6) electronic word of mouth has a significant effect on the decision to visit through brand image 7) electronic word of mouth has a significant effect on the decision to visit through trust. The influence of EWOM on the decision to visit is quite strong so that it can be considered for the managers of Kampung Tridi Malang to further develop marketing using social media. Keywords: Electronic Word of Mouth, Brand Image, Trust, Visit Decision, Kampung Tridi Malang

The research into the heating effect of secondary steel structures, having no fire proofing, on the fire resistance of fireproof steel beams

Introduction. The international practice of passive fire protection design, as well as some manufactures of fireproofing products recommend to apply fire proofing substances not only to the main element, whose fire resistance limit is standardized, but also to the elements that do not fall under any fire resistance standards. Various support brackets, pipeline supports (hereinafter — PS), etc. can serve as examples. They are not considered as bearing elements according to SP (Construction Regulations) 2.13130.2020, although they are connected to the structures that have fireproofing applied. It is recommended to apply fireproofing substances to such PS within the range of, at least, 450 mm from the point of attachment to the fireproof structure when the area of the PS cross section exceeds 3,000 mm2. No “supplementary” fireproofing is required by the Russian design and fire protection regulations.The subject of research. A change in the fire resistance limit of steel i-girders, caused by the PS heating, depends on the area of the PS cross section and the location of the point of its attachment.The goal. The goal of the research is to analyze the effect, produced by the area of the cross section and the point of attachment, on the fire resistance limit of fireproof steel i-girders in the course of heating.Materials and methods. ANSYS Workbench 2020 R2 (student version) was applied to perform the numerical simulation.Results. The simulation has shown that the PS, having no fireproofing, influences the fire resistance limit of fireproof structures.Conclusions. Currently available methods of analysis of the fire resistance of steel structures take no account of the fire resistance limit reduction, caused by the heating of the PS that has no fireproofing. The numerical simulation has shown that the fire proofing design must take account of the potential reduction in the fire resistance limit of fireproof structures, exposed to the heated PS that has no fire proofing. The further verification of the effect, produced by the PS, that has no fireproofing, on the time to the limit state of a fireproof steel i-girder requires fire tests and supplementary investigations to evaluate the influence of the PS on the heating of vertical fireproof constructions, including the case of the hydrocarbon fire mode.

Good Corporate Governance, Profitabilitas, Kebijakan Deviden dan Nilai Perusahaan Pada Konstituen Jakarta Islamic Index 70

Penelitian ini bertujuan untuk mengetahui pengaruh good corporate governance, profitabilitas, kebijakan deviden terhadap nilai perusahaan pada konstituen Jakarta Islamic Index 70. Populasi dalam penelitian ini adalah perusahaan yang terdaftar di Jakarta Islamic Index 70 tahun 2018-2020. Teknik pengambilan sampel yaitu purposive sampling dan diperoleh 49 perusahaan dengan periode penelitian selama 2 tahun. Metode analisis data yang digunakan adalah analisis regresi data panel dengan menggunakan software E-views 8 Student Version. Hasil penelitian menunjukkan bahwa secara simultan good corporate governance, profitabilitas dan kebijakan deviden berpengaruh signifikan terhadap nilai perusahaan. Secara parsial, hasil penilitian menunjukkan good corporate governance dan kebijakan deviden tidak berpengaruh signifikan terhadap nilai perusahaan. Sedangkan profitabilitas berdasarkan hasil penelitian menunjukkan berpengaruh signifikan terhadap nilai perusahaan