The suitability between expectations and reality of the quality of education students get during college affects students' perceptions of education quality in a study program. Information on the achievement of the implementation of main courses subjects and the teaching and learning process can be used as a basis for evaluating and mapping the gaps between the curriculum and the teaching and learning process with the required competencies. This study aims to determine students' perceptions of core subjects' learning outcomes in the D3 KS and D3 KG Pograms, Department of Civil Engineering PNJ. The method used in this research is the survey method, with purposive random sampling and descriptive analysis approach. Meanwhile, the performance and gap analysis use the Importance-Performance Analysis (IPA) method. The results denote that the students' perceptions of the learning outcomes of the main courses of the D3 KG and D3 KS Programs, Department of Civil Engineering PNJ showed promising results. The IPA analysis shows that six of the seven D3 KG Study Program main courses are in Quadrant II, and six of the eight D3 KS Program main courses are also in Quadrant II.
The porous asphalt mixture is a new generation of flexible pavement that is able to pass water in the upper layer (wearing course) both vertically and horizontally. The porous asphalt layer effectively provides more safety, especially when it rains to avoid aquaplaning which causes roughness of the surface to be more rough. Therefore, at this time there are many studies on the use of alternative materials to replace the limited natural materials with materials that can be utilized. The results showed that porous asphalt mixture with used tire crumb as a fine aggregate mixture had an increase in flow value of 6.32% with a decrease in stability value by 27.52% and a decrease Marshall Quotient value at 31.82%. The testing of roughness is increased by 17.71% and Mu-Meter 24.14%. This research is effective in overcoming environmental problems which include processing tire waste of 3.03 tons for 1 km of road pavement construction work.
The presence of the interfacial transition zone (ITZ) between aggregates and the mortar matrix in concrete has been studied extensively. A numerical and experimental study involving concrete specimens with multi-inclusions was conducted, and the ITZ was modeled as a cutoff bar in the finite element analysis, representing the shear and tensile behavior. The mortar specimens were sized 100 mm by 100 mm, with a thickness of 50 mm, and the inclusions were cylindrical aggregates with a diameter of 20.85 mm. The specimen was loaded in uniaxial compression. Two inclusion axes configurations were considered: parallel and perpendicular to the line of loading. The finite element analysis was performed assuming a 2D behavior. Further, the aspect of the distance between inclusions was studied. It was shown that, in general, the perpendicular arrangement resulted in a significantly higher compression strength when compared to the parallel formation. For both the parallel and perpendicular configuration, the relationship between the increase in the axis distance and the compression strength followed a quadratic path. First an increase in strength was observed, followed by a reduction, as the axis distance evolved. Additionally, it was shown that the ITZ area in tension initiated the failure of all specimens.
The purpose of this research is to recalculate the upper structure of the X building of Jakarta State Polytechnic uses SNI-2847-2019 regulations regarding concrete and SNI 1726- 2019regarding earthquakes. This building consists of 3 floors which use concrete as its main structure. Recalculation includes structural elements starting from collar beam, floor plates, beams, and columns, which are expected to withstand the loads who worked on it. Structural analysis was performed using the ETABS 2013 software. Especially for the calculation of the column structure, the SP Column software is used. The results were obtained from the recalculation of the PNJ x Building in the form of dimensional differences and reinforcement against the existing building. Dimension and reinforcement after redesign became more the size of the existing building. The recalculation results indicate that planning re-using SNI 1726-2019 and SNI 2847-2019 are strong to bear the working load after the dimensions and reinforcement are enlarged.
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