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Effect of Temperature on Gasification of Biomass Using Zeolit

Journal of Physics: Conference Series 2021年第1期1845卷

作者： H Porawati A Kurniawan E Yuliwati Study Program of Mechanical Engineering Politeknik Jambi Jambi Indonesia Graduate Program of Chemical Engineering Universitas Muhammadiyah Palembang Indonesia Program Study of Chemical Engineering Faculty of Engineering Universitas Muhammadiyah Palembang Indonesia

Biomass gasification converts into syngas through the gasification process is promising for renewable energy utilization. Although gasification is a sustainable and environmentally-friendly technology for value-added utilization of biomass, yield percentage is the major problem during biomass gasification. An optimized gasifier and highly active catalyst were proved to be effective for biomass production. Furthermore, the decomposition pathway was also important to advance the gasification reactors and catalyst design. This paper summarized the fundamentals, such as gasifier types, zeolite catalysts, and reaction and deactivation mechanisms. This review also sheds light on other excellent catalysts, effective gasifier, and catalyst reaction mechanisms are also discussed in detail. At last, the paper ends with a conclusion and a prospective discussion of the lab-scale research. At the contact time of 240 minutes, with a column height of 30 cm, at a temperature of 450 oC, the concentration of syngas promise well.

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Spatial pattern of sediment transport for analysis of precipitation direction and magnitude in the upper Lematang river sub-basin 4

Spatial pattern of sediment transport for analysis of precip...

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4th Geomatics International Conference 2019, GeoICON 2019

作者： Sarino Yuono, Agus Lestari Putranto Dinar, D.A. Civil Engineering and Planning Study Program Faculty of Engineering University of Sriwijaya Jl. Raya Inderalaya Km. 32 Ogan Ilir Regency Inderalaya South Sumatera Province Indonesia Civil Engineering Post Graduate Study Program Faculty of Engineering University of Sriwijaya Jl. R. Soeprapto Bukit Besar Palembang City South Sumatera Province Indonesia

The high level of erosion that occur in Musi river basin has improved a tremendous impact on sedimentation in downstream areas and has resulted in many infrastructure of water is disturbed, such as silting of irrigation channels, siltation of rivers which disrupt the flow of transport stream and increasing the risk of flooding, high sedimentation in the port basin, low quality of water and the rising costs of water treatment. This study utilizes techniques terrain models Digital (Digital Elevation Model/DEM) to analysis the spatial distribution of the potential for erosion and sources of sedimentation, as well as the direction of the flow of sediment into channels as well as its relationship with outlet in branching river as the supplies to be sediment to the river flow. The method used in this study using a spatial model analysis with the help of GIS in analysing and presenting the level of erosion and deposition by utilizing modelling slope and kinetic energy of rainfall to estimate the index erosivity and distribution pattern of sediment into the river channel. This research was conducted at the upper Lematang river sub basin with area 412,638 Ha, which are classified into 11 sub-chatments with the highest altitude is 3.159 m above sea level (Dempo Valley) and the lowest is 126 m above sea level (Talang tinggi Valley). Analytical results have been tested by taking a fine sediment sampling in each sub-watershed in the analysis and is taken along the channel network and compare the observed patterns with the results predicted by the model analysis of soil erosion. Overall, erosion by high intensity tends to occur in the relationship between the different vegetation coverage, the barren land and open land used for farms and land used for mining. Approximately 45-65.5% slope bad condition because the vegetation has been open, so it can be seen the amount of erosion in the area is 2.139 ton/ha/year, at the sloping is 1.8239 ton/ha/year. © 2019 Published under licence

关键词： Erosion

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Corrigendum to “Behavioral aspects of safety culture: Identification of critical safety-related behaviors of motorcyclists in Indonesia's urban areas via the application of behavioral-based safety programs” [IATSS Research journal 46 (October 2022) 353–369]

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IATSS Research 2022年第4期46卷 623-623页

作者： Andrijanto Makoto Itoh Felix Sandro Sianipar Risk Engineering Department Graduate School of Systems and Information Engineering University of Tsukuba Ibaraki 305-8573 Japan Industrial Engineering Program Study Faculty of Engineering Universitas Kristen Maranatha Bandung 40164 Indonesia Faculty of Engineering Information and Systems University of Tsukuba Ibaraki 305-8573 Japan

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Tsunami evacution building model (TEBM) in Teluk Palu (Palu Bay) area

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IOP Conference Series: Materials Science and engineering 2022年第1期1212卷

作者： M Bakri R Awalia S Mulyati F Zubaidi M Rusydi A A Kasim R Prawita Department of Architecture Faculty of Engineering Tadulako University PaluIndonesia Department of Physics Faculty of Mathematics and Natural Sciences Tadulako University Palu Indonesia Department of Informatics Faculty of Engineering Tadulako University Palu Indonesia Study Program of Architecture Faculty of Engineering Tadulako University Palu Indonesia

The research was conducted in the coastal area of Palu Bay, Lere Village. Data were collected using observation, interviews, and literature study techniques. The data were analyzed using qualitative descriptive methods and focused on the concept of the design of the tsunami evacuation building on the coast of Palu Bay. Data analysis was carried out to obtain an overview of the problems that occurred at the planning location which was analyzed with the concept of architectural design by considering the existing conditions of the site and the surrounding environment, as well as utilizing the potential of the site so that it has the potential for building functions. The conclusion obtained is based on the results of data analysis, it is necessary to have a building that can function as an evacuation container for the community when a disaster occurs in the coastal area of Palu Bay, thereby reducing the number of casualties. The benefit of this research is that it is a solution for local people to save themselves when the tsunami disaster.

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The optimization of ultrasonic-assisted extraction of antioxidant compounds from butterfly pea flower (Clitoria ternatea L.) by using response surface methodology

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IOP Conference Series: Earth and Environmental Science 2021年第1期743卷

作者： N Izza D Tristantini Bioprocess Engineering Study Program Faculty of Agricultural Technology Universitas Brawijaya Department of Chemical Engineering Faculty of Engineering Universitas Indonesia

Butterfly pea flower (Clitoria ternatea L) contains many phytochemical compounds that are beneficial to human health, one of which is incorporated in the group of phenolic compounds. Generally, the extraction process of an organic compound requires heat and takes a relatively long time. Therefore, the application of the ultrasonic method for the extraction of butterfly pea flower is studied. This study aims to obtain the best-operating conditions in the ultrasonic-assisted extraction of the phenolic compound of the butterfly pea flower. The optimization of operating conditions during the extraction process was performed by using Response Surface Methodology (RSM) with the application of Design Expert 10 software. The results of the optimum operating conditions are 62,063 ml/g of solvent and flower ratio, 60% ultrasonic power output, and 15 minutes of extraction time. These operating conditions result in 55.834 ml of extract, 0.874 mg/ml of total phenolic content (TPC), and 10.42 mg/l of total anthocyanins (TA).

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Security measures and intrusion detection systems for preventing and mitigating SSL renegotiation denial of service attacks

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AIP Conference Proceedings 2024年第1期3135卷

作者： Amalia Nurain Teddy Mantoro Rudy A. G. Gultom Richardus E. Indrajit Cyber Defense Engineering Study Program Faculty of Defense Science and Technology The Republic of Indonesia Defense University Bogor Indonesia Media-Tech Lab Departement of Computer Science Sampoerna University Jakarta Indonesia Pradita University Jakarta Indonesia

Inundating a system, network, or application with traffic is the goal of Denial of Service (DoS) attacks, a disruptive form of attack. SSL DoS attacks, particularly those involving renegotiation, are of particular concern. In order to address these types of attacks, the study proposes several security measures, including rate restriction, session caching, SSL acceleration, and integrating Intrusion Detection Systems (IDS) with a systematic technique method to reduce the risks associated with SSL renegotiation DoS attacks. This study investigates the security measures for preventing and mitigating SSL DoS attacks, with a focus on renegotiation attacks. It offers advice and insights for protecting systems to SSL server administrators and network security professionals by doing rate restriction, session caching, and SSL acceleration to avoid SSL DoS attacks.

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Prediction of electricity load growth of tangerang city using SIMPLE-E 2

Prediction of electricity load growth of tangerang city usin...

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2nd IEEE International Conference on Innovative Research and Development, ICIRD 2019

作者： Putra, Andi Aulia Nayusrizal, N. Untari, Indira Wibisono, Gunawan Hudaya, Chairul Department of Electrical Engineering Faculty of Engineering Universitas Indonesia Depok16424 Indonesia Energy System Engineering Master Study Program Faculty of Engineering Universitas Indonesia Depok16424 Indonesia Trunojoyo Block M-I No.135 Jakarta12160 Indonesia

ISBN: (纸本)9781728128252

The electricity load growth should be planned appropriately to meet energy demand in a certain area. Electricity consumption growth is generally proportional with the economic and population growth. Using historical data on Gross Domestic Regional Product (GDRP) and population growth, the electricity load growth in the near future can be statistically predicted. The relationship between economic and population growth trend and total customers as well as the demands of contract electricity energy growth trend could be connected by the linear regression method to predict electricity energy consumptions. Through a Simple Econometric Simulation System (SIMPLE-E) program run in Microsoft Excel application, linear regression trend can be calculated. The purpose of study is to predict the growth of electricity consumption in Tangerang City-Indonesia, for the next ten consecutive years (2019-2028). Customer data that will be analyzed consist of five segments, which are Residential (R), Commercial (B), Industry (I), Public (P), and Social (S). Those can be combined with Gross Regional Domestic Product and human population using Multiples Linear Regression in SIMPLE-E. The correlation between dependent variables (total customers and contract of power) and independent variables (population and GRDP) will be computed in SIMPLE-E through rate value of correlation R, Adjusted R, and Durbin Watson test. The Actual trend data of total customer, contract power from 2012 to 2018, is compared to model equation from linear regression. The calculation of error use Root Mean Square Percentage Error and Mean Percentage Error, shows that the total error is less than 5%, meaning the simulation is scientifically accepted. This study shows that the average growth of electricity consumption in Tangerang city from 2019 to 2028 is 5.63%. It means that every 1% growth of economy in Tangerang will increase electricity load consumption for 0.94%. © 2019 IEEE.

关键词： Errors

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A simple approach for curcumin extraction from turmeric roots

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AIP Conference Proceedings 2022年第1期2537卷 040016页

作者： Siti Fauziyah Rahman Adella Josephin Ridha Alviny Syakirah Grace Priscilla Nadia Wulandari Nurul Intan Yudan Whulanza Biomedical Engineering Study Program Department of Electrical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia Research Center for Biomedical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia Department of Mechanical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia

Turmeric, particularly its most active ingredient, curcumin, has a long list of scientifically documented health advantages, including the ability to boost heart health and protect against a variety of diseases. Curcumin is one of the most important active components in turmeric, with a wide range of bioactivity and medicinal uses. Preparing samples from biological components is a time-consuming and difficult operation. This study aims to understand the process of extracting curcumin from turmeric and to analyze the appropriate solvent for curcumin extraction. The method used is Soxhlet extraction with acetone and ethanol as solvents. The analysis of curcumin content was carried out using a UV-Vis spectrophotometer. The results showed that the curcumin extracted with acetone solvent had a higher concentration than the extraction with ethanol. Therefore, extracting curcumin from turmeric using the Soxhlet method, acetone is a superior solvent than ethanol.

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A Cluster-Based Method for Improving Water Depth Estimation from Satellite Derived Bathymetry

A Cluster-Based Method for Improving Water Depth Estimation ...

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2020 International Conference on Data Science and Its Applications, ICoDSA 2020

作者： Meliala, Litany Juliansah, Tabah Adytia, Didit Sidiq, Teguh Purnama Windupranata, Wiwin Poerbandono Institut Teknologi Bandung Geodesy and Geomatics Engineering Study Program Bandung Indonesia Telkom University School of Computing Bandung Indonesia Institut Teknologi Bandung Geodesy Research Group Faculty of Earth Sciences and Technology Bandung Indonesia Institut Teknologi Bandung Hydrography Research Group Faculty of Earth Sciences and Technology Bandung Indonesia

ISBN: (纸本)9781728182353

In this presented paper, an effort to improve the accuracy of the bathymetric model derived from optical satellite imagery is discussed. According to the previous study, the accuracy approximately measures in 2 m for depth up to 10 m by means of the Global Bathymetric Inversion Methods. Therefore, the improvement is done based on the so-called Cluster-Based Method applied to the analytical and log-ratio methods. The Cluster-Based Method partitions the working area on the by classifying the errors between the known depths and the predicted ones. The data for the known and predicted depths are acquired from the in-situ survey and the Sentinel-2 imagery. Improvement by one-third to the accuracy of the resulting bathymetry is obtained. © 2020 IEEE.

关键词： Bathymetry

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Risk assessment of fishing trawl activities to subsea pipelines of sabah and labuan waters

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Journal of Maritime Research 2019年第3期16卷 7-13页

作者： Ahmad Fuad, A.F. Said, M.H. Samo, K. Mohd, M.H. Zainol, I. Universiti Malaysia Terengganu Kuala Nerus Terengganu 21030 Malaysia Universiti Kuala Lumpur Institute of Marine Engineering Technology Dataran Industri Teknologi Kejuruteraan Marin Bandar Teknologi Maritim Jalan Pantai Remis Lumut Perak 32200 Malaysia Safety of Navigation of Nautical Science and Maritime Transportation Program Faculty of Maritime Studies Maritime Safety of Nautical Science and Maritime Transportation Program Faculty of Maritime Studies Fishing Gear Technology of Maritime Technology Program Faculty of Maritime Technology and Informatic Maritime Offshore Structure of Maritime Technology Program Faculty of Maritime Technology and Informatic Maritime Universiti Kuala Lumpur Institute of Marine Engineering Technology Malaysia

Trawling is a method of catching fish in a large volume where fish nets are pulled through water using one or two boats. Bottom trawling is where the nets are pulled over on the seabed. The gear of the bottom trawling would impact the exposed subsea pipeline, on the seabed. Subsea pipelines transport crude oil and gas from the offshore platform to shore facility. This study assesses the risk of fish trawling activities to the subsea pipelines at Sabah and Labuan offshore. The specification of trawl equipment used by local trawlers in Sabah was determined by onsite survey. The frequency of fish trawler crossing over the pipelines was calculated based interview on operation and site survey. The calculation of pull-over load of otter board was calculated using the DNVGL algorithm. The severity and frequency index of the risk matrix was developed based on literature review. Results showed that the pull-over load of otter board would not damage the pipelines. The risk posed by fish trawler activity to the pipelines is low and moderate. © SEECMAR | All rights reserved.

关键词： Risk Assessment Subsea Pipeline Trawl

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