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This Author published in this journals
All Journal The Indonesian Journal of Business Administration Teknologi Indonesia International Journal of Social Science and Community Service
Harry Budiman
Research Centre for Chemistry, Indonesian Institute of Science (RCChem-LIPI), Kawasan PUSPIPTEK Serpong, 15314 Tangerang, Banten
Arts Humanities Computer Science & IT Decision Sciences, Operations Research & Management Environmental Science

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 1 
FLOW RATE OF CARRIER GAS AFFECTING THE KEY PARAMETERS OF GC-TCD FOR CO2, C3H8, AND CO ANALYSIS: AN EXPERIMENTAL INVESTIGATION Zuas, Oman; Budiman, Harry
Teknologi Indonesia Vol 39, No 2 (2016)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v39i2.240

Abstract

This paper reports on the effect of flow rate of helium (He) carrier gas on the key parameters of gas chromatography equipped with thermal conductivity detector (GC-TCD) for the measurement of carbon dioxide (CO2 ), propane (C3H8) and carbon monoxide (CO) in gravimetric standard gas mixture (Grav-SGM). The carrier gas has a function to transport vaporized molecules through the column during the GC separation process. The study provides opportunity to experimentally investigate the effect of gas flow rate on the several key parameters of the GC-TCD including retention time, peak area, peak height, response factor, resolution and selectivity. The results show that all key parameters were found to be carrier gas flow rate dependent. The increase of the gas flow rate could significantly decrease the retention time, peak area and response factor of the gas components. While both resolution and selectivity factor were observed to have a substantial decrease with increasing the flow rate of carrier gas. Therefore, proper selection of flow rate level of carrier gas is suggested before a GC measurement is carried out for obtaining an optimum condition.
ADSORPTION OF ACID ORANGE-10 DYE ONTO CERIUM DIOXIDE NANOPARTICLES: A KINETIC STUDY Zuas, Oman -; Budiman, Harry; Nuryantini, -
Teknologi Indonesia Vol 38, No 1 (2015)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v38i1.139

Abstract

In this paper, a preserve work on the ability of cerium dioxide nanoparticles (CeO2-NPs) to remove acid orange-10 (AO-10) dye from aqueous solution by adsorption, focusing on the study of the kinetic of AO-10 dye adsorption onto CeO2-NPs surface, was reported. The kinetic data obtained at different concentration of AO-10 dye were analyzed using three different kinetic models, including pseudo-first order, pseudo-second order, and Elovich model. The result showed that the kinetic data fitted with the pseudo-second order kinetic model. Based on the adsorption mechanism data obtained through intraparticle diffusion evaluation, it was found that the adsorption of AO-10 dye onto CeO2-NPs was controlled by the mass transfer rate of the adsorbate molecule from outer to innerof the adsorbent particle. Thus, considering both previous and present studies, it can be suggested that the CeO2-NP appears to be a good adsorbent for the removal of AO-10 dye from aqueous solutions.
Business Strategy Formulation for Multi Makmur Mandiri Budiman, Harry; Hariandja, Evo S
The Indonesian Journal of Business Administration Vol 2, No 5 (2013)
Publisher : The Indonesian Journal of Business Administration

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

Abstract

Multi Makmur Mandiri is a company dealing in construction material trading and located in Garut Regency, West Java Province, Indonesia. As of recent years, Multi Makmur Mandiri faced with requirement of management regeneration. In order to facilitate it Multi Makmur Mandiri changes its business entity status from sole proprietorship to limited partnership company in 2012. These two changes required the company to restructure its organization and readjust its business strategy in order to maintain and improve its competitive advantage. The process of formulating business strategy may be divided into three main phases; strategic analysis, strategic analysis output and strategy identification, selection and implementation During strategic analysis, external analysis and internal analysis in order to provide output which will be to identify opportunities, threats, strengths and weaknesses. These 4 elements would then be used to identify business strategy alternatives which would be selected based on predetermined criteria. The result of selection process would end as proposed business strategies and its implementation plan. This paper’s objective is to provide business strategies suitable with Multi Makmur Mandiri’s situation. These proposed business strategies are expected to help Multi Makmur Mandiri to maintain and improve its competitive advantage. The result of this strategy formulation is: a). Value proposition based on product line breadth; b). Organization structure building; c). Implementation of integrated information system. Keyword: strategic market management, business strategy, formulation, construction material, building material.
The Influence of Company Size and Debt Ratio on the Financial Performance of Bank Subsector Companies Listed on the Indonesian Stock Exchange (IDX) in 2020-2023 Mursalini, Wahyu Indah; Nurhayati, Nurhayati; Budiman, Harry
International Journal of Social Science and Community Service Vol. 3 No. 4 (2025): October
Publisher : CV. Proaksara Global Transeduka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70865/ijsscs.v3i4.88

Abstract

This research analyzes how Company Size and Debt Ratio affect the Financial Performance of banking subsector companies listed on the Indonesia Stock Exchange from 2020 to 2023. Using quantitative regression analysis on financial statement data, the study employed purposive sampling to select 36 banking companies meeting the research criteria. The findings reveal that Company Size significantly and positively influences Financial Performance, with a t-value of 2.425 exceeding the t-table value of 1.987 and significance of 0.017 below 0.05, confirming hypothesis H1. Conversely, Debt Ratio shows no significant individual effect on Financial Performance, with a t-value of -1.410 below 1.987 and significance of 0.162 above 0.05, rejecting hypothesis H2. However, simultaneous testing demonstrates that Company Size and Debt Ratio together significantly affect Financial Performance, with an f-value of 3.612 surpassing f-table value of 3.103 and significance of 0.031 below 0.05, accepting hypothesis H?. The study concludes that Company Size plays a crucial role in enhancing banking sector financial performance, indicating that larger banks tend to achieve better financial outcomes. While Debt Ratio lacks individual significance, suggesting that debt levels alone do not meaningfully impact performance, the combined effect of both variables proves statistically significant. This suggests that when analyzed collectively, Company Size and Debt Ratio contribute to explaining variations in banking financial performance, though Company Size emerges as the more influential factor among Indonesian banking companies during the examined period.
Co-Authors Evo S Hariandja Mulyana, Muhammad Rizky Mursalini, Wahyu Indah Nino Rinaldi Nurhayati Nurhayati Nuryantini, - Nuryatini Nuryatini Oman Zuas Sabar Simanungkalit, Sabar Zuas, Oman -