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Site amplification factor become crucial in seismic hazard microzonation, which depends on local geological condition, therefore identification of bedrock depth is very important related to sediment thickness. One of the Geophysical method that can be applied for subsurface investigation is microtremor array survey method (MAM). This method doesn’t require seismic source, so it is very possible to be applied in the urban area. Bandung basin is a research project for seismic hazard and risk study, where most of this area covered by high population and settlements that becomes the obstacle in this field survey. Geologically, Bandung basin consists of volcanic rock and floodplain, and we can find outcrop of Tertiary rock in some parts the basin. Seismicity in Bandung basin is very active because there are many seismic sources around it, such as shallow crustal and megathrust segment in the southern part. The microtremor array survey was conducted in Southern basin at 3 sites observation represent shallow and deep bedrock depth by using triangular array in shape. The result shows the bedrock depth in BB12 is 139 m, BB13 is 211 m and BB14 is 192 m. This condition represents the feature of bedrock position in Southern Bandung basin.

Seismicity analysis can be carried out using deterministic and probabilistic methods. One approach that can be done with the help of OpenQuake is the Scenario Seismic Hazard Analysis (SSHA) and Probabilistic Seismic Hazard Analysis (PSHA) methods. The question arises regarding the equivalence between the two methods in producing earthquake acceleration values. In this study, it was tested using a single earthquake source, namely the Lembang Fault. The observed area is in the Bandung Basin area, bounded by mountains on the north and south sides. The method compares the acceleration values (PGA/Peak Ground Acceleration) between PSHA return periods of 500, 1000, 2500, 5000 and 10000 years with SSHA. The results obtained are a value agreement between PSHA with a return period of 5000 years and SSHA. The resulting acceleration (PGA) near the Lembang Fault is 0.5-0.6g.

The progress of 5G networks is propelled by wireless technology, specifically mobile internet and smart devices. This article provides an in-depth analysis of the fundamental elements of 5G technology, encompassing the advancement of cellular networks, simultaneous transmission capabilities, energy efficiency enhancements, and the implementation of cooperative communication. This study examines the application of simultaneous wireless information and power transfer (SWIPT) in cooperative device-to-devices (D2D) communication. Specifically, it investigates relay selection using decode-forward (DF) protocols and considers the issue of selfinterference. Radio frequency based energy harvesting (RF-EH) is proposed to address power limitations in device-to-device (D2D) communication. This article describes the development of this technology and suggests a system architecture that employs time-switching relaying (TSR) techniques to enhance the power efficiency of base stations. This research aims to assess data transfer efficiency in two-way cooperative communication systems by incorporating many technologies. [ABSTRACT FROM AUTHOR]

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