KAJIAN ANALISIS HARGA SATUAN PEKERJAAN (AHSP) SNI 2016 DIBANDINGKAN DENGAN BINA MARGA 2020 PADA PEKERJAAN LAPIS ASPAL AC-BC DAN AC-WC

This research is a type of quantitative research with a case study approach, namely calculating the analysis of the unit price of road works carried out using the SNI 2016 and Bina Marga 2020 analysis methods. The locations used in this research are Jalan Dewi Sartika and Jalan Mojoranu Mastrip, Bojonegoro Regency. Based on the research results, it is known that there is a difference in the unit price of the work between the 2016 SNI analysis and the 2020 Bina Marga. In the Asphalt Concrete-Binder Course (AC-BC) work using the Bina Marga 2020 method, the difference in work unit prices is greater than the 2016 SNI analysis of 1.09% for Jalan Dewi Sartika and 4.38% for Jalan Mojoranu Mastrip. Whereas the Asphalt Concrete-Wearing Course (AC-WC) work using the Bina Marga 2020 method also has a larger difference in the unit price of work compared to the 2016 SNI analysis of 47.54% for Jalan Dewi Sartika and 51.77% for Jalan Mojoranu Mastrip. The ratio of unit price comparisons between the 2016 SNI analysis and 2020 Bina Marga for the Asphalt Concrete-Binder Course (AC-BC) work using the Bina Marga 2020 method has a larger ratio difference compared to the 2016 SNI analysis of 1.01 for Jalan Dewi Sartika and 1.04 for Jalan Mojoranu Mastrip. Meanwhile, the Asphalt Concrete-Wearing Course (AC-WC) work using the Bina Marga 2020 method also has a larger ratio difference compared to the 2016 SNI analysis of 1.48 for Jalan Dewi Sartika and 1.52 for Jalan Mojoranu Mastrip. All supporting components in the Asphalt Concrete-Binder Course (AC-BC) and Asphalt Concrete-Wearing Course (AC-WC) have different differences in work unit prices and ratios. Based on these differences it is known that the most efficient components are workers and foremen

Catalytic Oxidative Desulfurization of Dibenzothiophene Utilizing Composite Based Zn/Al Layered Double Hydroxide

In this study, the Zn/Al-TiO2 and Zn/Al-ZnO was successfully synthesized. The catalysts were characterized by X-ray Diffraction (XRD), Fourier Transform Infra Red (FTIR), and Scanning Electron Microscope—Energy Dispersive X-ray Spectroscopy (SEM-EDS). The typical diffraction peaks of Zn/Al-LDH, TiO2, and ZnO still appear in the Zn/Al-TiO2 and Zn/Al-ZnO composites, indicating that the composite preparation did not change the form of precursors. FTIR spectra of Zn/Al-TiO2 and Zn/Al-ZnO showed absorption band at 3448, 1627, 1381, 832, 779, and 686 cm-1. The catalysts have an irregular structure where the percent mass of Ti and Zn on the composite at 10.6% and 55.6%, respectively. The acidity of Zn/Al-LDH composite increased after being composed with TiO2 and ZnO. The percentage conversion dibenzothiophene on Zn/Al-ZnO, Zn/Al-TiO2, ZnO, Zn/Al-LDH, and TiO2 was 99.38%, 96.01%, 95.36%, 94.71%, and 91.92%, respectively. The heterogeneous systems of catalytic reaction was used for reusability. After 3 cycles catalytic reactions at 50 oC for 30 min, the percentage conversion of dibenzothiophene on Zn/Al-LDH, TiO2, ZnO, Zn/Al-TiO2, and Zn/Al-ZnO were 77.42%, 83.19%, 82.34%, 84.91%, and 89.71 %, respectively. The composites of Zn/Al-TiO2 and Zn/Al-ZnO have better reusability test than Zn/Al-LDH, TiO2, and ZnO, which proofing that Zn/Al-TiO2 and Zn/Al-ZnO have a stable structure. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

SPEECH RECOGNITION BAHASA INDONESIA UNTUK ANDROID

SPEECH RECOGNITION BAHASA INDONESIA UNTUK ANDROID