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All Journal Journal of Geoscience, Engineering, Environment, and Technology Maneggio
Puspitafuri, Cindy
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Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Physics Other

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Identification Of Shear Strain On The Surface Ground Of Wangi-Wangi Island, Southeast Sulawesi, Indonesia, Using Nakamura’s Technique and The Possibility Of Its Impacts Manan, Abdul; Puspitafuri, Cindy; Chahyani, Rani; Irawati; Pertiwi, Imanuela Indah
Journal of Geoscience, Engineering, Environment, and Technology Vol. 8 No. 4 (2023): JGEET Vol 08 No 04 : December (2023)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2023.8.4.11780

Abstract

This research was conducted to determine the possible impact of an earthquake on the mainland of Wangi-Wangi Island based on the presence of shear strain on the surface ground (γ). The size of γ is obtained by multiplying the ground susceptibility index and the acceleration of basement ground or PGA using Nakamura’s technique. The data used are microtremor data and earthquake data from 1920 to 2020 sourced from the USGS. Microtremor data are obtained from the results of filtering ground vibration signals using a Band Pass Filter in the frequency range between 0.5 to 25 Hz. Ground vibration signals were recorded at 47 measurement points spread over the surface of Wangi-Wangi Island within 29.25 to 48.16 minutes. Furthermore, the microtremor data were processed using the HVSR (Horizontal to Vertical Spectral Ratio) method. The use of earthquake data must meet the requirements for a surface magnitude (MS) ≥ 5.0 SR and an earthquake epicenter depth (h) ≤ 45 km. The results obtained are the γ sizes of Wangi-Wangi Island in the order of 10-06 to 10-03. Based on the size distribution, it is known that the majority of the Wangi-Wangi Island area has the potential to experience cracks and land subsidence due to settlements if an earthquake occurs, and only a portion of the area is vibrating. In addition, it is also known that the mainland of Wangi-Wangi Island is not prone to landslides and liquefaction because γ<10-2.
Risk Management Strategies in the Face of Global Market Uncertainty Karsim, Karsim; Gunawan, Deni; Puspitafuri, Cindy; Junaidi, Ahmad
Maneggio Vol. 1 No. 3 (2024): Maneggio-Juni
Publisher : Pt. Anagata Sembagi Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62872/v9ahph86

Abstract

In today's dynamic global economy, organizations face increasing challenges in managing risk amidst market uncertainty. This paper addresses a gap in current research by focusing on innovative risk management strategies designed to effectively address these uncertainties. Using a qualitative research approach, this study investigates how organizations identify, assess, and mitigate risk through in-depth interviews and thematic analysis. The novelty lies in exploring the integration of traditional risk management frameworks with emerging qualitative methodologies to improve decision making and resilience. By leveraging qualitative insights, this research aims to uncover various risk factors that are often overlooked by quantitative approaches, thereby offering a comprehensive understanding of risk dynamics in complex global markets. This study contributes to advancing theoretical frameworks and practical applications in risk management, empowering organizations to proactively adapt and thrive in turbulent environments. Based on the evaluation that has been carried out, it can be stated that risk management plays a crucial role in influencing company performance. Risk management not only functions to manage company resources with efficiency, but also to optimize the results obtained so that the company can achieve the financial goals that have been set.
Co-Authors Abdul Manan Ahmad Junaidi Chahyani, Rani Gunawan, Deni Imanuela Indah Pertiwi Irawati Karsim, Karsim