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Nugroho, Guntur
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Double Burden Trap: Poverty of Sandwich Households in Bengkulu Province Nugroho, Guntur; Nurlatifah, Nurlatifah
Jurnal Sosial Teknologi Vol. 6 No. 4 (2026): Jurnal Sosial dan Teknologi
Publisher : CV. Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jurnalsostech.v6i4.32769

Abstract

The phenomenon of sandwich households those bearing dual economic burdens both upwards and downwards across generations has the potential to increase socio-economic vulnerability, yet remains underexplored in poverty-related studies. This research aims to analyze the characteristics of sandwich households and the factors influencing their poverty status in Bengkulu Province in 2024. Utilizing data from the 2024 National Socio-Economic Survey and a multinomial logistic regression approach, this study classified sandwich households into four economic status categories: poor, vulnerable-to-poverty, moving toward the middle-class, and middle-class. The findings reveal that households headed by individuals aged over 35, working as informal workers, having more than four dependents, and receiving social-economic assistance are more likely to fall into the poor and vulnerable-to-poverty groups. In addition, the low educational attainment of the household head significantly increases the risk of falling into the vulnerable category. These results indicate that there are opportunities for targeted policy interventions focusing on these at-risk groups through skills training, improved access to formal employment, and better-targeted social-economic assistance programs. Moreover, enhancing educational quality represents a vital long-term strategy to break the cycle of intergenerational economic vulnerability within sandwich households.
Effects of Square Body Openings in Castellated Steel Beams on Stiffness and Natural Frequencies Nugroho, Guntur; Aughitri, Fayza
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 22 No. 1 (2026): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v22i1.87871

Abstract

Castella beams are one of the steel structural innovations that have the advantage of reducing weight without sacrificing bending stiffness, so they are widely used in long-span structures. This study aims to analyze how square-shaped openings affect the natural frequency of castellated beams, considering different numbers of openings and various support conditions. The research was conducted numerically using Abaqus CAE software and theoretically using Stokey's theory. Five models were tested with the number of openings between 9 and 19 and three different support conditions: fixed-fixed, fixed-pinned, and pinned-pinned. Results show that increasing the number of openings significantly decreases the mass and stiffness of the beam, which impacts the natural frequency values of the structure. The analysis results using Stokey's theory yield natural frequency values that tend to be higher than the numerical analysis because it does not consider the local weakening effect due to the openings. The difference between the results of the two approaches reaches 7-904 Hz, depending on the configuration and vibration mode analyzed. The difference is more striking at higher vibration modes because the concentration of local deformation is more dominant. Modifying Stokey's formula by adding an inertial correction coefficient proved to predict the downward trend of the natural frequency more accurately. The results show that the natural frequency values at low vibration modes are in high agreement. Therefore, it is recommended to use this approach, especially in low-vibration mode analysis.
Co-Authors Alhussein, Mohammedalameen Ahmed Aldaw Aughitri, Fayza Darimolyo, Priyo Novendri Euis Kania Kurniawati Fuqaha, Sameh Nurlatifah Nurlatifah, Nurlatifah Nursetiawan Nursetiawan, Nursetiawan Pujianto, Asat Setiadi, Yaya Wahiddin, Wahiddin Zaki , Ahmad