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Seismic Vulnerability Microzonation Using Hvsr Method in Kalisalak Hamlet, Garunglor Village, Sukoharjo Sub-District, Wonosobo District Adam Ardiansyah; Aryono Adhi; Nugroho Budi Wibowo; SARWI; Budi Astuti; Cindiwati
Jurnal Fisika Vol. 14 No. 2 (2024): Jurnal Fisika 14 (2) 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v14i2.10851

Abstract

Kalisalak Hamlet in Sukoharjo District is faced with the risk of landslides that can affect the structure of residents' houses. This study aims to identify potential landslide zones based on the parameters of Dominant Frequency (f_0), Amplification Factor (A_0), and Seismic Vulnerability (K_g)to determine areas that are potentially vulnerable to landslides. Microseismic measurements were carried out at 25 measurement points in the landslide zone. Measurements used a 3-component digital portable seismograph (North-South, West-East, and Vertical). Microseismic data were processed using Geopsy software with the HVSR (Horizontal-to-Vertical Spectral Ratio) method to obtain an H/V curve that provides Dominant Frequency (f_0) and Amplification Factor (A_0) values. The results showed that Kalisalak Village has a dominant frequency value between 3 Hz to 12.5 Hz and an amplification factor value between 1.4 to 6.8. This variation indicates that some areas are more susceptible to seismic vibration amplification. Based on the Dominant Frequency (f_0) value and Amplification Factor (A_0), a Seismic Vulnerability (K_g) microzonation map was created for Kalisalak hamlet with a value range of 0.2 to 7 with a high vulnerability value located in the landslide area south of the village. This map is important for disaster mitigation planning in Kalisalak hamlet.
Analysis of Newton’s Laws Concepts in Besei Kambe: A Traditional Sport of Central Kalimantan Agitha Anastasya; Ani Rusilowati; Budi Astuti
Jurnal Penelitian Pendidikan Vol. 43 No. 1 (2026): April 2026
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpp.v43i1.40947

Abstract

Besei Kambe is a traditional Dayak game from Central Kalimantan in which two teams compete by pulling a jukung on the water. Beyond its cultural significance, this activity embodies various physics concepts that can be utilized as contextual learning resources. This study aims to identify and analyze the physical principles that emerge during the practice of Besei Kambe, particularly those related to Newton’s laws, action–reaction forces, and resultant forces. Through qualitative analysis based on illustrative observation and literature review, the study reveals that the motion dynamics of the boat and the interactions between the paddlers and the water reflect direct applications of these fundamental physics concepts. These findings indicate Newton’s First Law appears when the boat remains still under balanced forces, Newton’s Second Law when an unbalanced force causes acceleration, and Newton’s Third Law in the action–reaction interaction between the paddle and the water. These findings demonstrate that Besei Kambe naturally represents fundamental mechanics principles and can serve as an effective contextual resource for physics learning grounded in local wisdom.
Strategi Berkelanjutan dalam Pengelolaan Sampah Rumah Tangga di Kelurahan Mangunsari, Semarang Nuni Widiarti; Budi Astuti; Sungkowo Sungkowo; Yuan Maylia Rosanti; Rojja Maysa Rohmah; Shinta Hilda; Syiva Zakia Aulia; Devitri Sulistyaningrum; Cepi Kurniawan
Jurnal Abdimas Vol. 28 No. 1 (2024): June 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/hzmh2j50

Abstract

Kelurahan Mangunsari is located at Semarang city and emerges as a locale brimming with potential, yet grappling with the pervasive challenge of waste management, a predicament shared by many urban areas. This neighborhood faces the daunting task of dealing with both organic and inorganic waste, wherein the latter has seen some resolution through the establishment of a waste bank in RW 04. However, the management of organic household waste remains a critical issue. Addressing this, the Community Empowerment Team (PkM) from Universitas Negeri Semarang (Unnes) has embarked on a pioneering mission to imbue the local populace with the knowledge and skills necessary to transform waste into valuable resources, namely compost and ecoenzymes. This endeavor unfolds in three strategic phases: an educational campaign on waste management principles, hands-on training in compost and ecoenzyme production, and a rigorous monitoring phase to evaluate the program's efficacy. The initiative's results are commendable, marking a significant milestone in community-led waste management practices. Not only has it been successful in producing compost and ecoenzymes, but it has also fundamentally shifted the community's perception, recognizing the initiative as a transformative tool for enhancing household waste management. This case study not only underscores the potential of community empowerment in environmental stewardship but also serves as a replicable model for sustainable urban waste management solutions.