2019 · JOURNAL_SUBMISSION ·
<em>The research discusses about the design of electronic module assembly and installating computer. The module was designed for assembling and installating computer content displayed in digital way, so this modul is very flexible and easy to be used. The content was displayed by video to make it easier to understand by the learners. The method used consists of several phases; analysis, design, coding and testing. The design used UML process and then was developed by Kvisoft Flip book maker. The result of this research shows how the assembly and installation module was easier to be used for the teacher and the students.</em>
2016 · JOURNAL_SUBMISSION ·
<p style="margin: 1em 0px; color: #111111; font-family: Arial, Verdana, Helvetica, sans-serif; font-size: 11.2px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #fafafa;">The band gap of a 1,3,4 thiadiazole of monomer and dimmer in anti position, monomer and dimer of its – BH<sub>2</sub><span class="Apple-converted-space"> </span>substituted of those compounds had been studied by Calzaferri method. The optimized geometry had been obtained by optimizing the bond length (l) arA bond angel (α). The bond surface (δ) was not been optimized since those molecules were assumed to be planar. The band gap was determined by measuring the different of HOMO and LUMO of the optimal condition. From there studies it were obtained that the Eg 1,3,4 thiadiazole monomer ard dimer in anti position, monomer and dimer of its substiruted - BH<sub>2</sub><span class="Apple-converted-space"> </span>were 4,35793 eV; 3.31008eV ; 4.8900eV ;3,09322 eV; 3.11124 eV, respectively. Based on Eg. valued it was concluded that monomer substituted by -BH<sub>2</sub>, 1,3,4 thidiazole diamer in anti position and dimmer of its substituted - BH<sub>2<span class="Apple-converted-space"> </span></sub>have Eg in semiconductor range (1,0-3,5 eV). The 1,3,4 thiadiazole monomer had Eg in the isolator range.</p><p style="margin: 1em 0px; color: #111111; font-family: Arial, Verdana, Helvetica, sans-serif; font-size: 11.2px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #fafafa;">Key words: Monomer, Dimer, Tiadiazol Tersubstitusi-BH2</p>
2016 · JOURNAL_SUBMISSION ·
<p style="margin: 1em 0px; color: #111111; font-family: Arial, Verdana, Helvetica, sans-serif; font-size: 11.2px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #fafafa;">The study on molecule m<sub>2</sub>N<sub>2</sub><span class="Apple-converted-space"> </span>(m=H, Li, Na, Be, Mg, B, Al, C, Si, N, P, O, S, F, Cl) with symmetrical groups D<sub>~h<span class="Apple-converted-space"> </span></sub>and D<sub>2h<span class="Apple-converted-space"> </span></sub>had been conducted by using Ab Initio method. As a part of HyperChem pro 6.0, this program was operated with Pentium 4. The research involved a number of linear cyclic molecules m-N-N-m as well as m-N-m-N. As the result of the computation process, it was found that generally the cyclic molecules m<sub>2</sub>N<sub>2<span class="Apple-converted-space"> </span></sub>were more stable than those of the other linear molecules signed with the smaller total energy. It was also found that the most stable linear molecules were NºN resulted from the optimalization of Cl-N-N-Cl with the total molecule energy: -637778.1251 kcal/mol. Meanwhile, the most stable cyclic molecules were S-N-S-N with the total molecule energy: -560789.9726 kcal/mol. </p><p style="margin: 1em 0px; color: #111111; font-family: Arial, Verdana, Helvetica, sans-serif; font-size: 11.2px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #fafafa;">Key words: cyclic molecule, ab initio</p>
