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Delivering blended learning for generation Z: When will we be ready?

AIP Conference Proceedings 2023年第1期2590卷

作者： Andian Ari Anggraeni Febrianto Amri Ristadi Culinary Sciene Study Program Faculty of Engineering Universitas Negeri Yogyakarta Indonesia Mechanical Engineering Study Program Faculty of Engineering Universitas Negeri Yogyakarta Indonesia

Teaching and learning have shifted from synchronous meetings in the classroom and laboratory to virtual synchronous and asynchronous meetings. Teaching and learning can take place anytime and anywhere. The availability of ICT infrastructure is one of the supporting factors for teaching and learning in today's Education 4.0. This article describes the availability of ICT facilities to support blended learning. Accidental sampling was conducted on 56 lecturers of the Faculty of engineering, Universitas Negeri Yogyakarta (UNY), who participated in a webinar and filled out polls. The polls revealed that nearly 72% of respondents had subscribed to Internet Service Providers and cellular data packages. Total respondents who own laptops or PCs with Intel Core i3 / AMD Ryzen 3 processor specifications were only 23%, yet a mere 4% still own lower processors specifications. Cloud-based software provided by UNY, such as Microsoft 365, was only used by 46% of respondents. The availability of facilities to support virtual synchronous meetings included headset 96%, Zoom educational license 86%, and interactive application 18%. In contrast, facilities to support asynchronous meetings were owned only by less than 60% of respondents, including condenser or clip-on microphone types, graphic pads, video editing software, screen recording software, and project management software. Facilities to support collaborative asynchronous activities such as Google Workspace were applied by 66% of respondents. The availability of ICT facilities supporting teaching and learning is an indicator of readiness for Education 4.0, and this study shows it needs to be improved.

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Compressive strength evaluation and phase analysis of pulp capping materials based on carbonate apatite-SCPC using different concentration of SCPC and calcium hydroxide

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Key engineering Materials 2018年第1期782卷 15-20页

作者： Cahyanto, Arief Restunaesha, Muga Zakaria, Myrna Nurlatifah Rezano, Andri El-Ghannam, Ahmed Department of Dental Materials Science and Technology Faculty of Dentistry Universitas Padjadjaran Jl. Raya Bandung-Sumedang KM 21 Jatinangor45363 Indonesia Graduate Student of Faculty of Dentistry Universitas Padjadjaran Jl. Raya Bandung-Sumedang KM 21 Jatinangor45363 Indonesia Department of Endodontology and Operative Dentistry Program Study of Dentistry Faculty of Medicine Universitas Jenderal Achmad Yani Jl. Terusan Jenderal Sudirman PO BOX 148 Cimahi Indonesia Department of Anatomy Physiology and Cell Biology Faculty of Medicine Universitas Padjadjaran Jl. Raya Bandung-Sumedang KM 21 Jatinangor45363 Indonesia Department of Mechanical Engineering and Engineering Science University of North Carolina at Charlotte CharlotteNC28223 United States

The mechanical strength of pulp capping material based on carbonate apatite and silica calcium-phosphate composite (CO3Ap-SCPC) is one of the key factors for the success of the material in protecting the vitality of the pulp during the formation of apatite and dentin reparative. Modifying the material in the powder phase was known to increase the mechanical strength. The purpose of this study was to determine whether the addition of SCPC and calcium hydroxide in pulp capping materials based on CO3Ap-SCPC would affect the compressive strength of this pulp capping material. In this study, three cement groups were used, each group consisted of dicalcium phosphate anhydrous and vaterite which added by SCPC concentration 0%, 5% and 10% and calcium hydroxide concentration 0%, 5% and 10%, respectively. All groups were tested by a compressive strength test and X-Ray diffraction (XRD) for phase analysis. The mean value of compressive strength with addition of 0% SCPC and 10% Ca(OH)2 was 16.54 ± 1.35 MPa, addition of 5% SCPC and 5% Ca(OH)2 was 18.55 ± 2.81 MPa, addition of 10% SCPC and 0% Ca(OH)2 was 9.22 ± 1.21 MPa. The addition of SCPC and Ca(OH)2 show statistically significant in compressive strength (p2 could improve the mechanical strength and the apatite formation of the CO3Ap-SCPC pulp capping material. © 2018 Trans Tech Publications, Switzerland.

关键词： Compressive strength

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Fracture Zone Analysis Based On Property Electrical Borehole Image Log And Geomechanic Geothermal Field Solok, West Sumatra

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Journal of Physics: Conference Series 2019年第1期1363卷

作者： Friska Agustin Chalid Idham Abdullah Merandy Palabiran Asti Sulastri Geology Engineering Study Program Faculty of Earth Sciences and Technology ITB Mechanical Engineering Study Program Faculty of Mechanical and Aerospace Engineering ITB Mining Exploration Institute of Technology & Science Bandung (ITSB)

Prospective area of Solok geothermal lies in step over transtensional between two segments, Suliti and Siulak, Sumatra faults. Geological structure in this prospect area shows structural pattern controlled by 'oblique divergent strike-slip fault system' (releasing bend) as a proceed of embraced movement from Sumatra fault and establishes 'dilation zone' between those two segments, forming negative flower structure in direction of NW-SE and N-S. The pattern of geological structure is predicted to control the availability of solok geothermal system which in this case related to presence of surface manifestation. The pattern of geological structure is predicted to control the availability of solok geothermal system which in this case related to presence of surface manifestation. Surface manifestation indicates good permeability zone that can be used as flow path of geothermal fluid from reservoir.

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Comparison of fracture toughness testing by the single edge v-notch beam and the surface crack in flexure method on silicon nitride

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IOP Conference Series: Materials Science and engineering 2020年第1期852卷

作者： Tjokorda Gde Tirta Nindhia Study Program of Mechanical Engineering Faculty of Engineering Udayana University Jimbaran Bali Indonesia

This work is intended to compare the SEVNB and the SCF methods for fracture toughness testing. Both of the test methods are applied to a silicon nitride. Both methods are standardized and both have some minor shortcomings with respect to practicability and match of the theoretical description of the test situation with the actual test situation. SEVNB is easy to perform, but uses a notch of known depth (+ small micro-cracks of unknown size in front of a notch) instead of a crack, SCF uses a presumably residual stress-free indentation crack which is sometimes difficult to measure, not always semi-elliptical, as assumed to apply the evaluation formula, and may be accompanied by lateral cracks. Both methods will be analysed with respect to possible experimental errors. Variations of the SCF method are applied in order to examine how pre-cracks can be introduced which can be detected on the fracture surface. The geometry of the SCF-pre-crack is varied by applying different loads and by removing different amounts of material. The geometry of the Knoop pre-cracks system is investigated. The results help to identify conditions under which the SCF method can be used successfully to measure the fracture toughness of silicon nitride ceramics.

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The investigation on cooling capacity and CELdek material pad classification of evaporative cooling pad system using different pad material with water temperature and water discharge variations

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AIP Conference Proceedings 2018年第1期1983卷

作者： Hendra Wijaksana I. Nyoman Suprapta Winaya Made Sucipta Ainul Ghurri Nengah Suarnadwipa 1Study Program of Mechanical Engineering Faculty of Engineering Udayana University Indonesia

The objective of this study is to evaluate the cooling capacity of evaporative cooling pad system using gunny sack and kerosene stove wick as pad material with variations on water temperature and water discharge of pad material wetting water and its appropriate to the use as an alternative pad material for commercial purpose of CELdek. The variety of pad material that can be used as a cooling medium in evaporative cooling pad system is very wide. Therefore it is need to analyze the performance of alternative pad materials variety in terms of cooling capacity. For this purpose, the test were conducted with three level water discharge (649.98 ml/min; 1299.96 ml/min; 1949.94 ml/min) and three different pad wetting water temperature (10 ± 1°C, 15 ± 1°C; 25 ± 1°C) for each pad material and for the thickness level of pad materials is arranged for gunny sack and kerosene stove wick with the thickness pad level respectively at 0.5; 1.0; 1.5; 2.0; 3.0 mm, in density of 3×2 mm, 2×1 mm and 6.0; 12.0 mm. In this research, 23 cylinder pad with wrapped material pad is arranged in staggered and placed perpendicular to the air flow direction, with length of 75 cm and diameter of 50 mm. The air suction velocity is keep constant on 0.818 m3/s, and discharge water is arranged using water distribution line contained 69 hole, in which for one hole has 28.3 ml/min, therefore to obtain water discharge for the first, second, and third water discharge would has opening hole for respectively 23, 46 and 69 holes,.the experiment is completed for three times repetitions for each discharge water, water temperature of every pad materials. According to the results of this study, it was found that the gunny sack at 3 mm thickness, 1949.94 ml/min water discharge and water temperature 15 ± 1°C has an average temperature drop,ΔT of 4.6°C with cooling capacity of 4.68 kW, while for the kerosene stove wick at 12 mm thickness, 1949.94 ml/min water discharge and water temperature 15 ± 1°C has the average

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Performance analysis of forced convection coolers using synthetic jets with variations in altitude from synthetic jets to heat sources

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Journal of Physics: Conference Series 2020年第3期1569卷

作者： Muchammad Baihaqi Muslich Damora Rhakasywi M As'adi Nur Cholis Mechanical Engineering Study Program Faculty of Engineering Universitas Pembangunan Nasional 'Veteran' Jakarta

Every electronic device has a disadvantage that is heat generated from the components contained in the device while operating. The heat that occurs during the process can affect the effectiveness of these electronic devices. The cooling fan is directed to a heat source from an electronic device with the aim of maintaining the device's performance temperature. However, the cooling fan used still has some disadvantages in terms of dimensions. Therefore, research on synthetic jets is carried out as an innovation in cooling. This study aims to find wave characteristics as a source. Optimum frequency selection to support cooling. As well as the ideal height of synthetic jets to heat sources. The method used in the research is direct and computer-based data retrieval for CFD. The use of triangular waves as a source of cooling with a frequency of 80 Hz at an altitude of 8 cm can reduce rapidly. However, the lowest final temperature comes from a height of 2 cm which is 28.1 °C.

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Analysis performance of forced convection cooling using synthetic jets with wave variations (sine, square, and triangular)

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Journal of Physics: Conference Series 2020年第3期1569卷

作者： Bintang Arya Putra Damora Rhakasywi M As'adi Nur Cholis Mechanical Engineering Study Program Faculty of Engineering Universitas Pembangunan Nasional 'Veteran' Jakarta

Cooling effectiveness using a cooling fan on an electronic device becomes a benchmark. Speaker- based synthetic jets that are becoming innovations today work on the principle of zero input mass, producing air in the cavity with an oscillating membrane which results in the suction phase occurring in the orifice hole. The generated air then flows through the orifice to pound the heat source as a forced convection cooler. Speakers used as oscillating actuators resemble waveforms using sine, square, and triangular wave functions with frequencies of 80, 100, and 120 Hz. Air flow simulation created using Fluent CFD. The use of wave variations has different characteristics. Triangular waves indicate the final test temperature reaches 27oC, with an optimum frequency of 80 Hz. Air flow created in the form of vortex flow with a type of turbulent flow. The electric power consumption of cooling fans reaches ten times the consumption of synthetic jet power.

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Development of teaching materials for gas metal arc welding (gmaw) practice courses

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Journal of Physics: Conference Series 2020年第1期1700卷

作者： Sudiyono Ari Dwi Nur Indriawan Musyono Sunyoto Ahmad Mustamil Khoiron Mechanical Engineering Education Study Program Universitas Negeri Semarang Automotive Engineering Vocational Education Study Program Universitas Negeri Semarang Semarang Indonesia

In improving the quality of human resources, one of which lies in the quality of quality education. In this case, education has a very important meaning in human life, both in the life of individuals, nations, and countries. Therefore education must be implemented as well as possible so that it is following the objectives that have been planned. The objectives to be achieved from this study are to produce teaching materials for GMAW welding practice materials, produce teaching materials that are suitable for use in GMAW welding practices, and provide an evaluation of the effectiveness of using GMAW welding practice teaching materials after being used in learning. This research method uses the Borg and Gall development research method which is simplified into four steps, namely modified (simplified) into 4 steps consisting of: (1) preliminary study; (2) product development and validation; (3) limited trial; and (4) the final product. The type of research used in this research is the development of teaching materials in the form of practice modules, job sheets, and evaluation sheets in the GMAW welding practice course. Based on the research results, the researcher can conclude that the development of teaching materials for GMAW welding practices has been implemented properly. The revised results from the experts have been applied to the modules made so that the modules can be used properly by students.

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The implementation of constructivism approach for physics learning in vocational high school

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AIP Conference Proceedings 2016年第1期1778卷

作者： Tuwoso 1Study Program of Mechanical Engineering Education Mechanical Engineering Department Faculty of Engineering Universitas Negeri Malang Indonesia

The nowadays Physics learning at vocational high school is still focusing on teacher-centered. Therefore, the learners’ activities are only listening to a lecture from the teacher and take notes. The learning process is supposed to be students-centered, the teacher acts as a facilitator and mediator. The learning process should provide an opportunity for learners to acquire knowledge itself in accordance with the prior knowledge they already had, which is the result of interaction with the environment. Such learning process is in accordance with the constructivist view. The method in this research is quantitative research, the research design pretest-posttest control group design. The research subjects are 30 students for the experimental group and 30 students in the control group. The experimental group in this research is the group that is taught by the constructivist approach (student-centered), while the control group is taught by the teacher - centered approach. The obtained findings have significant differences in post test results of students who are treated as experimental groups and with the control group (p <0.05). The conclusion of this research is the implementation of Physics in vocational learning with constructivist approach proved to be effective and influence the improvement of learning outcome of students in the first semester for the tenth grade students of vocational high school.

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Implementation of project based learning model in mechanical machining skills package of vocational high school

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AIP Conference Proceedings 2016年第1期1778卷

作者： Dwi Agus Sudjimat 1Mechanical Engineering Education Study Program Departemen of Mechanical Engineering Faculty of Engineering Universitas Negeri Malang Indonesia

One model of learning that is most appropriate for vocational school based on standart learning process of curriculum 2013 was the use of project-based learning model. The findings of this study indicate that all of the mechanical machining teachers have implemented the project-based learning model based on their quite comprehensive understanding. Teachers perceive that project-based learning model can improve the hard skills and soft skills of the students. One weakness lies in the project is used, which is produced only by the analysis of the basic competencies of the subjects and does not use projects from industry so that most of the students’ products could not be used, what else is sold.

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