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From the class of 2018 to 2020, researchers found several weaknesses faced by physical education (PE) teachers in elementary schools in developing active learning. One of the very basic weaknesses is the low creativity and innovation of teachers in developing basic movement skills and character values with a play approach, and in this case, playing is made in the form of games that suit the needs of students. Teachers tend to use existing forms of play such as baseball, soccer, volleyball, and basketball, even though these games are not compatible with elementary school children's growth and development level. The purpose of research and development of learning variations of PE in sports and health based on a play approach is expected to develop basic movement abilities and character values of elementary school students. The research method used is Borg and Gall's research and development. The subjects of this study were 4th-grade elementary school students and four teachers at UPT Percut Sei Tuan. The research instrument uses a rating scale so that the variation of PE learning based on the play approach is suitable for improving elementary school students' basic techniques and character values.

Reclaimed Asphalt Pavement (RAP) is a dredging pavement material using Cold Milling Machine. The application of Reclaimed Asphalt Pavement is increased year by year. Due to the increasing application of RAP year by year which implicates environment condition, especially in damaging natural resources, the research on material used in RAP needs to be conducted, so RAP can be optimally utilized. To achieve optimal performance, data of RAP characteristics reviewed from microstructural analysis is necessary. The objective of this research is to obtain the characteristics of Reclaimed Asphalt Pavement. The method used was literary study based on previous research. Material tests used were XRF, SEM and FTIR. The object of study was RAP material taken from national road Waru Sidoarjo. The major compositions of Reclaimed Asphalt Pavement obtained were Kaolin, Lithium, Tetraborate, Dextrin. SEM graphics showed the morphological and surface texture of RAP. FTIR graphic presented the functional group of Reclaimed Asphalt Pavement showing O-H C-O acid in the peak of graphic. From XRD result, the major compounds of Reclaimed Asphalt Pavement obtained were Calcium, Sodium, Aluminum, Silicate.

This study has developed Micro Punch CNC Machine design by optimizing the function of the actuator axis implemented to make an implant plate. This research aimed to plan the simulation of CNC machine construction strength using the blanking operation application. Finite element method (FEM) was used to analyze the material strength. The research results showed that the maximum stress occurring at the punch tools was 428.17 MPa with the thickness of 0.6 mm and the maximum thickness of workpiece allowed in making the implant plate was 1.4 mm with the maximum stress of 999.09 MPa. The obtained data indicate that the most effective material to be used as the material construction in CNC micro blanking machine is St42. This case is proven by the result of the power to resist the stress and the value of maximum deformation from the comparison of both materials.

The increasing of needs on several industrial fields such as medical, electrical and mechanical field require accurate dimensional and geometrical function and efficiency in a product, one example being the manufacture of micro-hole and micropart products. As one of micromachining processes, CNC micro blanking machine is proposed as basic technology to fabricate the component with miniaturized dimension. In this study, the validation between theoretical input on the program control and mechanical motion is conducted to significantly reduce the gap between actual carriage motion and G-Code motion. The average deviation of actual velocity on post calibration is determined to be 10.8 mm/min, while for carriage displacement for X, Y, and Z axes are -0.0191; -0,0087; and -0.0005 mm, respectively. Based on the analysis has been performed, it can be concluded that the imprecision is caused by the geometrical deviation of carriage (linear guide), so, the carriage movement is hindered by the deviation.

Fly ash is a by-product obtained from coal combustion process. Some of the utilization of fly ash is to produce geopolymer products which have high compressive strength, fire, chemical resistance. This paper proposes fly ash from unit 1-7 Suralaya Power Plant Indonesia. The aims of this study are to obtain characterization of fly ash and mechanical properties of geopolymer paste based on variations of the alkali activator ratio. The method was based on previous research and laboratory investigation. XRF and compressive strength were analysed in this study. Alkali activator was obtained from NaOH and Na2SiO3 mixture. The ratio of Na2SiO3 to NaOH was in the range of 0.5-2.5. Geopolymer paste was casted in acrylic cylinders with a diameter of 2 cm and a height of 4 cm. The curing was conducted at room temperature until the day for the compressive strength test at 28 days. The result showed that the fly ash is classified as F class. Increasing the alkali activator ratio influenced the strength. The best composition of geopolymer paste is made with NaOH 8M, and the mass ratio of Na2SiO3 to NaOH is 2.5. This composition produced compressive strength of 98.6 MPa.

This study described the practice of Education for Sustainable Development (ESD) along with the supporting factors of the implementation of ESD in three elementary schools (SD) which are referred to as pilot education schools in Surabaya, namely SD Al Irsyad, Citra Berkat Primary Schooland Putat Gede I Surabaya Elementary School. The study used a qualitative approach with comparative descriptive methods. The instrument used in the form of in-depth interviews and documentation studies. Data analysis techniques included data reduction, data presentation and verification. The results of this study indicated that sustainable development practices that have been implemented in the Primary School in Surabaya take place (1) as diverse as conservation which includes the stages of preservation, restoration, adaptation and revitalization and ecoliteracy to facilitate so students can build connections, awareness and experience, (2) has been supported by the commitment of the school community and the leadership of the school principal as outlined in various policies and integrated into curricular and extracurricular activities, and (3) has shown a number of development indicators sustainable in the field of education. Based on the linkages of the three main aspects of ESD, it appears that practices implemented in schools are still dominantly focused on environmental activities. However, there have been efforts to link environmental activities with social and economic activities through entrepreneurship week, cultural appreciation shows and other collaborations and participation that involve the participation of school members, the community and other policy makers even though in a limited scope and simple activities.

Islamization in North Sumatra: A Study of Gravestone in Rantang and Barus Cities. When talking about the process of islamization in Indonesia, many an expert will focus on discussing Aceh. Where as in North Sumatra, especially around the city of Medan and Barus many ancient gravestones found that proves the Islamic religion has long foothold in this area. By analyzing the typology and chronology of Aceh tombstones and inscriptions found in gravestones in the cities of Rantang and Barus, North Sumatra Province is known that the process of islamization in North Sumatra have occurred since the 13th century AD. The process of islamization was eventually formed a political community of Islam in the design of the 13th century AD ie the emergence of the Kingdom of Haru in the Kota Rantang, Hamparan Perak.

The harvesting of groupers (Serranidae) in Indonesia for the live reef food fish trade (LRFFT) has been ongoing since the late 1980s. Eight sites in Komodo National Park that included two fish spawning aggregation (FSA) sites were monitored for groupers and humphead wrasse, Cheilinus undulatus, from 1998 to 2003 and from 2005 to 2008 to examine temporal changes in abundance and assess the effectiveness of conservation and management efforts. Monitoring identified FSA sites for squaretail coralgrouper, Plectropomus areolatus, and brown-marbled grouper, Epinephelus fuscoguttatus. Both species formed aggregations before and during full moon from September to December, prior to lapses in monitoring (2003–2005) and in enforcement (2004-2005). Following these lapses, data reveal substantial declines in P. areolatus abundance and the apparent extirpation of one aggregation at one site. Other non-aggregating species targeted by the LRFFT showed similar declines at three of eight monitored sites. This paper highlights the impact of FSA fishing and the need for a seamless monitoring and enforcement protocol in areas where aggregation fishing pressure is high. Within Komodo National Park, local fishers, particularly those operating on behalf of the LRFFT, pose a serious threat to population persistence of species targeted by this trade.

The global pandemic has pushed educational communities around the world to look for innovative solutions to make distance learning effective. One of the emerging solutions is to use Virtual Clashroom, a concept that combines cutting-edge video conferencing technology with student-focused interactions. This research discusses the application of Virtual Clashroom as a solution to connect teachers and students online in distance education. Virtual Clashroom provides an interactive platform that allows teachers to teach in a more interesting and interesting way. With features like digital whiteboards, screen sharing, and interactive chat, teachers can facilitate active and collaborative learning. Students can ask questions, participate in discussions, and collaborate with other students in a safe virtual environment. This research also evaluates the effectiveness of Virtual Clashroom in increasing student engagement, subject understanding, and teacherstudent interactions. The results show that Virtual Clashroom can create a more interesting and effective distance learning experience than conventional methods. Students reported high levels of satisfaction in using the platform, while teachers felt they could teach more effectively in a virtual environment. The Virtual Clashroom application opens up new opportunities in the world of education, especially during emergency situations such as a pandemic. By utilizing this technology, distance learning can become more interactive, inclusive and effective. This study provides valuable information about how. [ABSTRACT FROM AUTHOR]

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