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Yuant Tiandho
Universitas Bangka Belitung
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Journal : Edumatsains

 1 
Partikel Dirac dalam Sumur Potensial Dinamis Tiandho, Yuant
EduMatSains Vol 1, No 1 (2016): Juli 2016
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Infinite square well potential is one of the most elementary quantum mechanical system. The calculation of this case is not too complicated, however, it can show the differences between quantum world and classical world with clearly. In this letter, we expand the discussion about the infinite square well potential for dynamic potential well  by involving relativistic corrections. The dynamic potential is defined as potential wall that depend on time because the potential can moving with constant velocity. The Dirac equation is used to describe condition in the potential well. By this consideration, we hope the result will be useful in the development of nanoelectronic devices. To obtain solution of probability density of Dirac particles that depend on space and time, we transform the Dirac equation into hyperbolic coordinates and the differential equations can be solved by separation variables method.
Partikel Dirac dalam Sumur Potensial Dinamis Yuant Tiandho
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 1 No 1 (2016): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v1i1.66

Abstract

Infinite square well potential is one of the most elementary quantum mechanical system. The calculation of this case is not too complicated, however, it can show the differences between quantum world and classical world with clearly. In this letter, we expand the discussion about the infinite square well potential for dynamic potential well by involving relativistic corrections. The dynamic potential is defined as potential wall that depend on time because the potential can moving with constant velocity. The Dirac equation is used to describe condition in the potential well. By this consideration, we hope the result will be useful in the development of nanoelectronic devices. To obtain solution of probability density of Dirac particles that depend on space and time, we transform the Dirac equation into hyperbolic coordinates and the differential equations can be solved by separation variables method.
Pengaruh Lama Pemanasan Terhadap Karakteristik Kristal Kalsium dari Limbah Cangkang Kerang Fitri Afriani; Mustari Mustari; Yuant Tiandho
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 2 No 2 (2018): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v2i2.606

Abstract

The high number of tin mining in the Bangka Belitung Islands leaves a number of problems such as unused land after tin mining. Whereas on the other side, the post tin mining areas can be used as a source of water reserves although additional treatment is needed because it is feared contain heavy metals. Calcium oxide is a compound that can be used to coagulate dispersed pollutants in water so that it can be used to improve the quality of water stored in the post tin mining area. One of the most abundant sources of calcium in the Bangka Belitung Islands comes from wasted cockle shell. Through a heating process at temperatures of about 700°C calcium carbonate in the wasted cockle shell will begin to decompose into calcium oxide. Based on the results obtained have known that the longer the heating process then the decomposition process of calcium carbonate more and more occur. Keywords: Rietveld, calcium crystal, heat treatment.
Green-Synthesis Nanopartikel SnO2 Termediasi Ekstrak Daun Pelawan (Tristaniopsis merguensis Griff.) Mustari Mustari; Evi J; Aliefia Noor; Rifqi Almusawi Rafsanjani; Yuant Tiandho
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 4 No 1 (2019): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v4i1.1043

Abstract

SnO2 nanoparticles are materials that have great potential in gas sensor devices. In this article, the synthesis of SnO2 nanoparticles is carried out through the mediation of pelawan (Tristaniopsis merguensis Griff.) leaf extract. The use of mediators of natural materials in this synthesis aims to make the synthesis process more environmentally friendly and lower in cost compared to conventional chemical and physical methods. Pelawan extract contains high antioxidant compounds. Thus, it can inhibit the agglomeration of SnO2 particles. Based on the variation of pH synthesis, it is known that the highest purity of SnO2 phase occurs at pH 7 while for alkaline conditions, there is an impurity, i.e., Sn6O4(OH)4. Calcination temperature has a very significant effect on the growth of SnO2 nanoparticle crystals. High temperatures will increase the size of the crystallite and the crystallinity. Keywords: green-synthesis, pelawan, tin oxide
Co-Authors Ahmad Fahrul Syarif Aisyah D. A. T. Safitri Aisyah D.A.T. Safitri Aisyah Deri Ayu Tungga Safitri Aliefia Noor Aliefia Noor Aliefia Noor Aliefia Noor Andi Gustomi Andrian Saputra Andrian Saputra Anggia, Suci Dwi Anisa Indriawati Anisah Mega Andini Asep Saefullah Asep Saefullah Awaliyah, Umi Dea Amelia Deden Nurdandi Diana Ayu Rostikawati Diana Novita Sari Eri Gusnia Evi J Evi J Evi J Evi J. Evi.J Evi.J Faradis, Syuraya Fenni Vavionita Fitri Afriani Gusnia, Eri Hamdini, Meri Herman Aldila Indra Pardede Isabela, Jennikita J, Evi J., Evi Kristina, Yulietta Lingga, Rahmad M. Yogi Riyantama Isjoni M. Yonggi Puriza Mahjur Mahjur Marlina Marlina Maryana, Okky Megiyo Megiyo Meri Hamdini Muhammad B Hariyono Muhammad David Ramadhon Mustari Mustari Mustari Mustari Mustari Mustari Mustari Mustari Mustari Mustari Naswanto, Sekar Kinanti Ramadhini Ningrum, Choirunnisa Dwi Ayu Nizar, Ahlun Noor, Aliefia Nurdandi, Deden Patilawati, Pariza Pratama, Erick Aryana Purwati Purwati Putra, Alfryan Maulana Rafsanjani, Rifqi Almusawi Rahmad Lingga Ramadina, Salsabila Redi Randika Rifqi A. Rafsanjani Rifqi Almusawi Rafsanjani Rifqi Almusawi Rafsanjani Rifqi Almusawi Rafsanjani Rika Favoria Gusa Robin Robin Safitri, Aisyah D. A. T. Salsabila Ramadina Sandi Sandi Sari, Prada Siswoyo Siswoyo Susanti Susanti Tri Kusmita Umi Alawiyah Umi Awaliyah vavionita, Fenni Wahri Sunanda Widodo B. Kurniawan Widodo Budi Kurniawan Wulandari, Rossariana Yekti Widyaningrum Yekti Widyaningrum Zaitun