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All Journal RADIASI: Jurnal Berkala Pendidikan Fisika Jurnal Inovasi Pendidikan IPA Indonesian Journal of Science and Education Unnes Science Education Journal Paedagoria : Jurnal Kajian, Penelitian dan Pengembangan Kependidikan Jurnal Sains dan Edukasi Sains Journal of Science and Science Education Jurnal Pendidikan Fisika dan Sains (JPFS) Jurnal Pembelajaran Fisika
Alvama Pattiserlihun
Universitas Kristen Satya Wacana
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Environmental Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Journal : Journal of Science and Science Education

 1 
Effects of air pressure changes on gamma linear attenuation coefficient in the air Wandi Wantoro; Suryasatriya Trihandaru; Alvama Pattiserlihun
Journal of Science and Science Education Vol 1 No 2 (2017): JoSSE Vol. 1 No. 2 (November 2017)
Publisher : Faculty of Science and Mathematics, Universitas Kristen Satya Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/josse.v1i2p55-61

Abstract

The measurements of gamma linear attenuation coefficient in the air at variance air pressure has been done. The measurements were performed to determine the effects of air pressure changes on gamma linear attenuation coefficient in the air. The measurements were used Co-60 as the gamma radiation source and LND 72 Geiger-Muller as the radiation detector in a room with 18oC room temperature and 68% air humidity. The linear attenuation coefficient value was calculated according to Lambert-Beer law. From the measurement, we obtained the attenuated gamma intensity in the air at air pressure variation. The unattenuated gamma intensity was determined by making a linear fit function of the attenuated gamma intensity data. From the calculation, It was found that the value of gamma linear attenuation coefficient in the air increases with the increasing of air pressure.
Sorption isotherm modeling of “gaplek” flour fortified by protein from red bead tree flour Margareta Novian Cahyanti; Alvama Pattiserlihun
Journal of Science and Science Education Vol 2 No 1 (2018): JoSSE Vol. 2 No. 1 (May 2018)
Publisher : Faculty of Science and Mathematics, Universitas Kristen Satya Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/josse.v2i1p1-6

Abstract

The objective of the study is to determine the characteristic of moisture sorption isotherm from "gaplek" flour fortified with protein from red bead tree flour using various modeling and being observed from the monolayer moisture content and its absorption types. This research used 5 salt solutions and storage temperature of 298K, 308K, and 318K. The models used were Brunauer-Emmet-Teller (BET), Guggenheim-Anderson-de Boer (GAB) and Caurie model. The monolayer moisture content was around 5.07 – 8.53% db. kb value of GAB model was around 0.5941-0.6252. c value of GAB model was around 16.0588-23.4111. C value of BET was around 32.7241-306.5000. Whereas the c value in Caurie model was around 1.1419-1.2769. The equilibrium and monolayer moisture content on ‘gaplek" flour fortified with protein from red bead tree flour was decreasing as the temperature going up. GAB constant value indicated that the process of moisture absorption on the "gaplek" flour fortified with protein from red bead tree flour categorized in type II.
Increasing Students’ Communication Skills Using Stimulant Question Model Eklesias Donesi Andresta; Marmi Sudarmi; Alvama Pattiserlihun
Journal of Science and Science Education Vol 2 No 2 (2018): JoSSE Vol. 2 No. 2 (November 2018)
Publisher : Faculty of Science and Mathematics, Universitas Kristen Satya Wacana

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Abstract

The purpose of this study is to make Lesson Plan using stimulant questions that emphasize the communication skills. This research uses CAR method of teacher type as researcher. Respondents from this study were 27 8th grade students of SMP in Salatiga. This research used 5 Lesson Plans with 5 materials. The results indicated that by giving stimulant questions, observers said that 89.22% students were more focused on learning indicated by active students who answered stimulant questions, supported by the results of the questionnaire where 89.34% students said that stimulant questions were in an order, logical, easy to understand, and can help them in solving various problems and the stimulant questions can improve their understanding of physics learning. In addition, the evaluation test results also indicated that 87.18% students understood the material. Therefore, stimulant questions can make students to be focused more and can make them understand the learning materials better.
Co-Authors Anis Pamilih Arif Kresno Prasetyo, Arif Kresno Cahyo Permadi Debora Natalia Sudjito Desi Yuliana Rudjubik Diane Noviandini Edi Istiyono Eklesias Donesi Andresta Erwin Hartaman Gea Ferdy Semuel Rondonuwu Julianto Patawaran Karina Indra Dewi Lilis Setyaningrum Made R. S. Shanti. N.A. Shanti. N.A. Made Rai Suci Shanti Nurani Ayub Margareta Novian Cahyanti Marmi Sudarmi Mustika, Inti Niky Ayu Sekar Arum Niky Ayu Sekar Arum Permadi, Cahyo SATRIYAS ILYAS Sepriana Leo Sita Ariyani Stephanie Jessy James Setiadi Sudji Munadi Suryasatriya Trihandaru Wahyu Hari Kristiyanto Wahyu Kurniawan Waluyo, Pujo Setyo Wandi Wantoro Yayi Suryo Prabandari