3 research outputs found
Impact of modern market growth to vegetable Hawker activity in Kelapa Gading sub district, North Jakarta
No full textThe formation of an open atoll in strike slip-fault setting: new insight from Maratua Island, Kalimantan-Indonesia
No full textThis study aims at reconstructing the mechanism explaining the formation of the V-shaped open atoll of Maratua Island. The reconstruction was conducted by examining the landforms, lithology, and geological structure of the region. We first examined the island through ALOS, SRTM image and using an oblique aerial photograph taken using a drone. Then, a field survey was conducted to identify the detailed morphological features, lithology, and structure of the area. The results reveal that the island has developed into seven different landforms, namely, karst ridge, undulated karst hills, structural valley, marine terrace, beach, fringing reef, and sand cays. The sinistral fault system is the major factor that controlled the Maratua Island’s formation, wherein the island is a push-up morphology of the fault that formed a carbonate high. Accordingly, the atoll formation seems to be an inheritance of eroded rollover anticline of Pliocene carbonate or older and continuing to the present time. The open atoll is caused by the southern block’s downward movement resulting from an oblique subsidiary sinistral fault mechanism. The research findings unveil new mechanism of atoll formation in the strike-slip fault setting that enrich the previous models. © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature
Design of Solar Powered Cooling Engine For Fishing Vessel ≤ 5 GT
Get PDF- The fishermen in Sendang Biru, Malang, East Java Province, Indonesia, using boat ≤5 GT, specifically an outrigger boat with 10,6 m Length of Overall (LoA), 1,3 m Breadth (B), and 0,7 m Depth (D), have experienced low priced fish catches for many years caused by low quality of fish handling on board. In this research, the researcher overcomes the problem by designing the solar powered cooling engine (SPCE) to maintain the caught fish quality on boat ≤5 GT, especially the boat with outrigger and size as previously mentioned. Meanwhile, the outrigger boat as mentioned above has limited in term of its space and its capacity on board. The research designed the SPCE that fitted to space and capacity of the outrigger boat. The stability of the boat had been analyzed by using IMO resolution on “IMO A.749 (18) Chapter 3”. The result of the analyses showed that the SPCE designed met the IMO criteria applicable to all ships, which has GZ Max 0,492 m at 25.5°, and as the general arrangement of the SPCE on the boat, the SPCE device put in the middle of the boat while in the back part of the boat is fisher working area.
