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<![CDATA[Thermoelectric Generator Module as An Alternative Source Of Electrical Energy in Rural Areas ]]>
<![CDATA[Arkundato, Artoto]]>;
<![CDATA[Jatisukamto, Gaguk]]>;
<![CDATA[Misto, Misto]]>;
<![CDATA[Maulina, Wenny]]>;
<![CDATA[Syah, Khalif Ardian]]>
<![CDATA[ Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 18, No 1 (2020): July ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/rekayasa.v18i1.23691
<![CDATA[It has been done a research to design a heat-to-electric converter as an alternative electrical energy source based on the thermoelectric generator devices that can convert the heat into the DC electricity. This research aims to determine the optimal operating temperature range to produce the thermoelectric generator’s output voltage as the desired conversion module. The developed conversion module uses the Seebeck effect by applying four thermoelectric generators arranged in an electrical circuit series. The electric current in thermoelectric generator occurs under the Seebeck effect due to the temperature difference between the two metal chips in the thermoelectric generator module. Candles were used as a heat source of thermoelectric generator module, while water is used for cooling. The results showed that the application of thermoelectric generator technology had produced an electrical voltage of about 5 volts. The thermoelectric generator’s operating temperature around 100 ºC, and the temperature of the water cooling medium was maintained at around 30 ºC so that there is a correlation with a temperature difference of about 70 ºC between the two sides of the thermoelectric generator chips. The electrical voltage that occurs could be used as a source of electrical energy for any purposes.]]>
<![CDATA[Evaluation of The Cloud Computing Training Program for Management of Collaborative Learning Document ]]>
<![CDATA[Harjito, Harjito]]>;
<![CDATA[Amalina, Nur Dina]]>;
<![CDATA[Nuswowati, Murbangun]]>;
<![CDATA[Kadarwati, Sri]]>;
<![CDATA[Susilaningsih, Endang]]>
<![CDATA[ Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 18, No 1 (2020): July ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/rekayasa.v18i1.22538
<![CDATA[Evaluation of the cloud computing training program for the teachers of integrated Islamic elementary school (SDIT) Al-Madina Semarang has been conducted with the facilitation of the Department of Chemistry lecturer as an instructor. The evaluation aimed was to measure the impact of training on increased knowledge and participants ‘ interest in implementing cloud computing technology. The evaluation Model in this study used a Goal-Oriented Approach (GOA). The instrument of knowledge aspect is compiled using a Likert scale with four options. The measured point includes the fundamental point of knowledge (5 items), after-activity experience (10 items), and collaborative Aspects of collaboration (4 items). The analysis of this study based on calculating the proportion of two criteria, i.e., low and high. 23 Participant Data eliminated to 17 based on completeness of instrument replenishment. The data was analyzed by using percentages. From the initial knowledge side, 12 of 17 entry categories are low. In contrast, 17 out of 17 participants feel confident about implementing cloud computing technology. The strength documents are sent to achieve a result of 100% both in terms of completeness and quantity. While the interest to collaborate gained a result of 12 out of 17 have a strong desire. All activities that have been carried out can be concluded that computing training programCOMPUTING TRAINING PROGRAM has succeeded in increasing the knowledge of participants to manage collaborative learning documents activities succeeded in increasing the knowledge of participants.]]>
<![CDATA[Supporting Elements in the Learning Process through E-Learning Training at SMAN 2 Boyolali ]]>
<![CDATA[Ekarini, Fitria]]>;
<![CDATA[Sukamta, Sri]]>;
<![CDATA[Arief, Ulfah Mediaty]]>;
<![CDATA[Ananda, Bella Risky]]>;
<![CDATA[Shofiani, Diah]]>;
<![CDATA[Oktiagi, Radiva Hera]]>
<![CDATA[ Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 18, No 1 (2020): July ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/rekayasa.v18i1.22747
<![CDATA[One positive impact of technological development on education is providing facilities to support the learning and teaching process. The teachers to be more efficient, and the delivery of material can be easily conveyed through e-learning facilities. Schoology is an e-hearing media platform with various facilities that make it easy for educators and students in the educational process to academic results. The purpose of this activity is to test the usability level of using Schoology. The administration and teaching process to go to the level of understanding of operations through community service carried out at SMAN 2 Boyolali. Pre-test results that indicate that the high school has not yet implemented a learning management system. There are 5.26% of teachers who are only limited to learning the e-learning Schoology, while 94.74% only know it through the Universitas Negeri Semarang team. After the training, the results of the post-test show that 80.26% of teachers can use Schoology. The existence of e-learning training can help teachers support the teaching and learning process at school.]]>
<![CDATA[Synthesis and Characterization of Graphene Using Coconut Shell Charcoal ]]>
<![CDATA[Sholehah, Amalia]]>;
<![CDATA[Vinanza, Naufal Eka]]>;
<![CDATA[Huda, Nurul]]>;
<![CDATA[Rengga, Wara Dyah Pita]]>
<![CDATA[ Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 18, No 1 (2020): July ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/rekayasa.v18i1.22952
<![CDATA[Coconut shell waste has great potential as a source of carbon in the future. Graphite is one of the carbon allotropes with layers of planar layered carbon atoms. One layer of graphite is called graphene with hexagonal carbon atomic structure. In this study, the Hummers method was used to obtain graphene from coconut shell waste. This method breaks the bonding graphite layer into graphene by utilizing the process of mixing a mixture of graphite and HCl solution with the addition of KMnO4 and NaNO3. Raman Spectroscopy characterization shows the formation of multilayer graphene with D, G, and 2D values in 1365, 1585, and 2865 cm-1. The Fourier Transform Infrared Spectroscopy characterization confirmed the bonds of C-O, C = C and C = O at 1220, 1580, and 1700 cm-1. Meanwhile, X-Ray Diffraction characterization showed a peak of diffraction of graphene at 2θ at 11.6o; 23.9o; and 43.5o. The graphene produced becomes more transparent with the length of time of stirring, and the smaller the size of the graphite particles results in the irregularity of the graphene crystal structure.]]>
<![CDATA[Empowering Secondary Students to Overcome Cyberbullying through Peer-Helper Training ]]>
<![CDATA[Sadida, Nuri]]>;
<![CDATA[Zakiah, Sari]]>;
<![CDATA[Nursanti, Ade]]>
<![CDATA[ Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 18, No 1 (2020): July ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/rekayasa.v18i1.23459
<![CDATA[The number of cyberbullying cases in Indonesia is one of the highest in the world. Cyberbullying could impact the victims to have low academic motivation, depression, and suicidal thoughts. Most of the cyberbullying victims are high school students. Therefore, the training is designed to provide student knowledge about forms, characteristics, and the negative impacts of cyberbullying, so that students can overcome the impact. The training used a single-group pretest-posttest design, in which participants' knowledge and attitude were measured before and after training was delivered. The module contains two main topics: knowledge of cyberbullying, and how to make friends in a digital environment safely. As much as 60 students participated in the training. The result showed that there is an increasing score from pre-test to post-test (from 7.13 to 72). It can be concluded that the contents of the training could increase participants' knowledge regarding cyberbullying.]]>
<![CDATA[Synthesis and Characterization of Graphene Using Coconut Shell Charcoal ]]>
<![CDATA[Sholehah, Amalia]]>;
<![CDATA[Vinanza, Naufal Eka]]>;
<![CDATA[Huda, Nurul]]>;
<![CDATA[Rengga, Wara Dyah Pita]]>
<![CDATA[ Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 18, No 1 (2020): July ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
DOI: 10.15294/rekayasa.v18i1.22952
<![CDATA[Coconut shell waste has great potential as a source of carbon in the future. Graphite is one of the carbon allotropes with layers of planar layered carbon atoms. One layer of graphite is called graphene with hexagonal carbon atomic structure. In this study, the Hummers method was used to obtain graphene from coconut shell waste. This method breaks the bonding graphite layer into graphene by utilizing the process of mixing a mixture of graphite and HCl solution with the addition of KMnO4 and NaNO3. Raman Spectroscopy characterization shows the formation of multilayer graphene with D, G, and 2D values in 1365, 1585, and 2865 cm-1. The Fourier Transform Infrared Spectroscopy characterization confirmed the bonds of C-O, C = C and C = O at 1220, 1580, and 1700 cm-1. Meanwhile, X-Ray Diffraction characterization showed a peak of diffraction of graphene at 2θ at 11.6o; 23.9o; and 43.5o. The graphene produced becomes more transparent with the length of time of stirring, and the smaller the size of the graphite particles results in the irregularity of the graphene crystal structure.]]>
<![CDATA[Empowering Secondary Students to Overcome Cyberbullying through Peer-Helper Training ]]>
<![CDATA[Sadida, Nuri]]>;
<![CDATA[Zakiah, Sari]]>;
<![CDATA[Nursanti, Ade]]>
<![CDATA[ Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 18, No 1 (2020): July ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
DOI: 10.15294/rekayasa.v18i1.23459
<![CDATA[The number of cyberbullying cases in Indonesia is one of the highest in the world. Cyberbullying could impact the victims to have low academic motivation, depression, and suicidal thoughts. Most of the cyberbullying victims are high school students. Therefore, the training is designed to provide student knowledge about forms, characteristics, and the negative impacts of cyberbullying, so that students can overcome the impact. The training used a single-group pretest-posttest design, in which participants' knowledge and attitude were measured before and after training was delivered. The module contains two main topics: knowledge of cyberbullying, and how to make friends in a digital environment safely. As much as 60 students participated in the training. The result showed that there is an increasing score from pre-test to post-test (from 7.13 to 72). It can be concluded that the contents of the training could increase participants' knowledge regarding cyberbullying.]]>
<![CDATA[Thermoelectric Generator Module as An Alternative Source Of Electrical Energy in Rural Areas ]]>
<![CDATA[Arkundato, Artoto]]>;
<![CDATA[Jatisukamto, Gaguk]]>;
<![CDATA[Misto, Misto]]>;
<![CDATA[Maulina, Wenny]]>;
<![CDATA[Syah, Khalif Ardian]]>
<![CDATA[ Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 18, No 1 (2020): July ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
DOI: 10.15294/rekayasa.v18i1.23691
<![CDATA[It has been done a research to design a heat-to-electric converter as an alternative electrical energy source based on the thermoelectric generator devices that can convert the heat into the DC electricity. This research aims to determine the optimal operating temperature range to produce the thermoelectric generator’s output voltage as the desired conversion module. The developed conversion module uses the Seebeck effect by applying four thermoelectric generators arranged in an electrical circuit series. The electric current in thermoelectric generator occurs under the Seebeck effect due to the temperature difference between the two metal chips in the thermoelectric generator module. Candles were used as a heat source of thermoelectric generator module, while water is used for cooling. The results showed that the application of thermoelectric generator technology had produced an electrical voltage of about 5 volts. The thermoelectric generator’s operating temperature around 100 ºC, and the temperature of the water cooling medium was maintained at around 30 ºC so that there is a correlation with a temperature difference of about 70 ºC between the two sides of the thermoelectric generator chips. The electrical voltage that occurs could be used as a source of electrical energy for any purposes.]]>
<![CDATA[Evaluation of The Cloud Computing Training Program for Management of Collaborative Learning Document ]]>
<![CDATA[Harjito, Harjito]]>;
<![CDATA[Amalina, Nur Dina]]>;
<![CDATA[Nuswowati, Murbangun]]>;
<![CDATA[Kadarwati, Sri]]>;
<![CDATA[Susilaningsih, Endang]]>
<![CDATA[ Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 18, No 1 (2020): July ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
DOI: 10.15294/rekayasa.v18i1.22538
<![CDATA[Evaluation of the cloud computing training program for the teachers of integrated Islamic elementary school (SDIT) Al-Madina Semarang has been conducted with the facilitation of the Department of Chemistry lecturer as an instructor. The evaluation aimed was to measure the impact of training on increased knowledge and participants ‘ interest in implementing cloud computing technology. The evaluation Model in this study used a Goal-Oriented Approach (GOA). The instrument of knowledge aspect is compiled using a Likert scale with four options. The measured point includes the fundamental point of knowledge (5 items), after-activity experience (10 items), and collaborative Aspects of collaboration (4 items). The analysis of this study based on calculating the proportion of two criteria, i.e., low and high. 23 Participant Data eliminated to 17 based on completeness of instrument replenishment. The data was analyzed by using percentages. From the initial knowledge side, 12 of 17 entry categories are low. In contrast, 17 out of 17 participants feel confident about implementing cloud computing technology. The strength documents are sent to achieve a result of 100% both in terms of completeness and quantity. While the interest to collaborate gained a result of 12 out of 17 have a strong desire. All activities that have been carried out can be concluded that computing training programCOMPUTING TRAINING PROGRAM has succeeded in increasing the knowledge of participants to manage collaborative learning documents activities succeeded in increasing the knowledge of participants.]]>
<![CDATA[Supporting Elements in the Learning Process through E-Learning Training at SMAN 2 Boyolali ]]>
<![CDATA[Ekarini, Fitria]]>;
<![CDATA[Sukamta, Sri]]>;
<![CDATA[Arief, Ulfah Mediaty]]>;
<![CDATA[Ananda, Bella Risky]]>;
<![CDATA[Shofiani, Diah]]>;
<![CDATA[Oktiagi, Radiva Hera]]>
<![CDATA[ Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 18, No 1 (2020): July ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
DOI: 10.15294/rekayasa.v18i1.22747
<![CDATA[One positive impact of technological development on education is providing facilities to support the learning and teaching process. The teachers to be more efficient, and the delivery of material can be easily conveyed through e-learning facilities. Schoology is an e-hearing media platform with various facilities that make it easy for educators and students in the educational process to academic results. The purpose of this activity is to test the usability level of using Schoology. The administration and teaching process to go to the level of understanding of operations through community service carried out at SMAN 2 Boyolali. Pre-test results that indicate that the high school has not yet implemented a learning management system. There are 5.26% of teachers who are only limited to learning the e-learning Schoology, while 94.74% only know it through the Universitas Negeri Semarang team. After the training, the results of the post-test show that 80.26% of teachers can use Schoology. The existence of e-learning training can help teachers support the teaching and learning process at school.]]>
