yrammuS 要概Lia Amelia Tresna Wulan ASRI115116Irwan GUMILARSericin Hydrogel Containing Moringa oleifera Leaves Extract for Wound Healing Scaffold(Project 2022)Risk evaluation of land subsidence and its Socio-Economic Impact in Bandung Basin(Project 2022)81Rep. Grant. Res., Asahi Glass Foundation (2023)One method of treating diabetic foot ulcers (DFU), especially superficial and deep ulcers, is by using a wound scaffold in the form of a hydrogel. Sericin derived from silkworm cocoons is a promising hydrogel material candidate. Sericin protein is a part of silk that is rarely used but has the potential for biocompatibility, biological activities, and is easy to process. One of the drawbacks of sericin hydrogels is their lower mechanical properties. Therefore, hydrogel was composited with PVA through the freeze-thaw technique to obtain a hydrogel with good stability. Sericin/PVA hydrogel was prepared with variations in solution concentration and the ratio of PVA and sericin. It resulted in the hydrogel with interconnected pore structures. Hydrogel-based wound dressings are often chosen for the treatment of DFU in combination with herbal extract. Moringa oleifera leaves extract was embedded into sericin/PVA hydrogel as a substance to heal DFU. In this study, the morphological and structural properties of sericin/PVA hydrogels were evaluated. The micro-CT imaging analysis was done to confirm hydrogel structure and calculate its porosity percentage. The compression test and hyperelasticity validity test were done to validate the hyperelastic material model.Several natural disasters have the potential to occur in the Bandung Basin, such as volcanic eruptions, earthquakes, erosion, landslides, and flooding. In addition to these disasters, the Bandung Basin is currently experiencing a land subsidence disaster. Land subsidence disaster is a problem for big cities in Indonesia such as Jakarta, Semarang, Pekalongan, and Bandung. This disaster has a long-term adverse effect on the people in the affected area. Land subsidence in Bandung Basin has long been identified using Global Positioning System (GPS) data and Interferometry Synthetic Aperture Radar (InSAR). Land subsidence has various effects in the Bandung Basin, including cracks in buildings, infrastructure damage (roads and bridges), tilting and damaged buildings, and increased flooding inundation areas. Flooding occurs regularly in the Bandung basin during the year, with significant flooding generally occurring after heavy rainfall. Land subsidence and flooding in the Bandung basin have resulted in significant economic losses. Land subsidence in the Bandung Basin is expected to occur until now, and the impacts tend to be worse. This paper aims to determine the current status of land subsidence in the Bandung Basin using GPS and InSAR methods. Therefore, the proposed research is addressed to consecutively achieve the following two main goals: (1) to estimate the current status of land subsidence in Bandung Basin, (2) to map the socio-economic impacts of land subsidence in Bandung Basin, (3) to create the risk map/analysis of land subsidence in Bandung Basin. The methodology of this research consists of GPS and InSAR data processing, field survey to map the impact of land subsidence on the building, and land subsidence risk modelling. The results shown the land subsidence is still occurring in many areas of the Bandung basin, according to our InSAR and GPS results. Subsidence rates range up to 17.5 cm per year based on InSAR measurements, and GPS also validates the InSAR results. Many residential housing units, buildings, roads, and bridges are also affected by land subsidence and tend to be worse from time to time. Based in Risk modelling, some areas in Bandung City and Bandung District classified to the high risk of subsidence. This land subsidence disaster must be given special attention in the development process and in the regulation of the Bandung basin. Some areas in Bandung city and Bandung District have a high risk of land subsidence.
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