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Journal articles on the topic 'Northwest Java'

Author: Grafiati

Published: 18 May 2024

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1

Denney, Dennis. "Hybrid Gas-Lift Application Offshore Northwest Java." Journal of Petroleum Technology 52, no. 05 (2000): 30. http://dx.doi.org/10.2118/0500-0030-jpt.

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Sutayasa, Md. "Notes on the Bum Pottery Complex, Northwest Java." Mankind 8, no. 3 (2009): 182–84. http://dx.doi.org/10.1111/j.1835-9310.1972.tb00433.x.

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3

Septama, Erlangga, C. Prasetyadi, A. Abdurrokhim, et al. "The hidden sedimentary basin underneath the Quaternary volcanic unit in Bogor and Kendeng area." Berita Sedimentologi 47, no. 2 (2021): 25–47. http://dx.doi.org/10.51835/bsed.2021.47.2.323.

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The Java Island is an active volcanic arc that experiences several volcanism episodes, which gradually changes from South to North from the Late Oligocene to Pleistocene, following the subduction of the Australian plates underneath the Eurasian plates. During the Eocene, the southern and northern part of Java was connected as one passive margin system with the sediment supply mainly comes from Sundaland in the north. The compressional tectonics creates a flexural margin and a deep depression in the central axis of Java Island and acts as an ultimate deep-sea depocenter in the Neogene period. I

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4

Widianto, E. "Petroleum system of Northwest Java basin based on gravity data analysis." IOP Conference Series: Earth and Environmental Science 106 (January 2018): 012106. http://dx.doi.org/10.1088/1755-1315/106/1/012106.

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Namara, Aliep Fishabil, I. Wayan Nurjaya, and Mochamad Tri Hartanto. "Modelling of ocean currents and distribution of total suspended solids in Citarum River estuary." BIO Web of Conferences 106 (2024): 03004. http://dx.doi.org/10.1051/bioconf/202410603004.

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The Citarum River is an important river in West Java, which empties into the Java Sea carrying large suspended sediment concentrations. The purpose of this study is to examine the interaction of current patterns and distribution of total suspended solids (TSS) in the Northwest and Southeast Monsoons using hydrodynamic Modelling. The flow model and TSS used were 2-dimensional models with the OpenFlows FLOOD software. The ocean tide model results were validated using the Root Mean Square Error (RMSE) method with a value of 0.10. The current velocity in the West and East monsoons ranges from 0.07

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Adriansyah and George A. McMechan. "AVA analysis and interpretation of a carbonate reservoir: northwest Java basin, Indonesia." GEOPHYSICS 66, no. 3 (2001): 744–54. http://dx.doi.org/10.1190/1.1444964.

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A detailed analysis is performed of amplitude variation with angle (AVA) observations in six common‐midpoint gathers with reflection points that are over and beside carbonate reefs in the Parigi Formation in the northwest Java basin. Both empirical analysis and full‐wavefield modeling of the AVA data suggest that the presence of gas affects AVA by reducing the bulk density of the reservoir, decreasing of the overburden [Formula: see text] ratio and by local attenuation caused by gas sieving through the overlying sediments. The slopes of AVA curves for reflections from the top of the Parigi are

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Hidayati, Sri, Y. Suparman, and A. Loeqman. "Focal Mechanism and Parameter of Volcano-Tectonic Earthquake Source, in Mount Guntur, West Java." Indonesian Journal on Geoscience 6, no. 1 (2011): 1–11. http://dx.doi.org/10.17014/ijog.6.1.1-11.

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DOI: 10.17014/ijog.v6i1.111Guntur Volcano in West Java is one of the most active volcanoes in Indonesia. The last eruption took place in 1847 and the volcanic activity has been dormant since then, however its seismicity is active. During the period of July to October 2009, the hypocenter distribution of VT earthquakes is mostly located at western flank of the volcano, beneath Guntur - Gandapura craters at the depth of less than 5 km. The depth pattern shows deeper to the northwest. The VT earthquakes deeper than 5 km were not found in this period. The focal mechanism of VT earthquakes are obli

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Napitupulu, Haposan, Leroy Ellis, and Richard M. Mitterer. "Post-generative alteration effects on petroleum in the onshore Northwest Java Basin, Indonesia." Organic Geochemistry 31, no. 4 (2000): 295–315. http://dx.doi.org/10.1016/s0146-6380(99)00154-0.

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Adriansyah, A., and George A. McMechan. "Analysis and interpretation of seismic data from thin reservoirs: Northwest Java Basin, Indonesia." GEOPHYSICS 67, no. 1 (2002): 14–26. http://dx.doi.org/10.1190/1.1451317.

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A detailed analysis and interpretation is performed of a 2‐D seismic line over a sequence of thin reservoirs in the upper Cibulakan formation in the Northwest Java Basin. Most well sites in this area are selected to be structures near fault zones as faults are assumed to be the main hydrocarbon migration paths. Amplitude variation with offset analysis is little used because of contamination by thin‐layer tuning effects. Attribute analysis, impedance inversion, and full‐wavefield modeling suggest that gas reservoirs are detectable even when they are less than their tuning thickness, as they cor

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10

Tri Muji Susantoro, Sugihardjo, Ketut Wikantika, et al. "CCUS-EOR Optimization to Achieve Zero Emission Program Targets in Northwest Java Basin." Evergreen 10, no. 3 (2023): 1809–18. http://dx.doi.org/10.5109/7151730.

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11

Pratama, Cecep, Leni Sophia Heliani, Nurrohmat Widjajanti, et al. "Recent GPS-based long wavelength crustal deformation revealed active postseismic deformation due to the 2006 Yogyakarta earthquake." Journal of Applied Geodesy 16, no. 2 (2022): 131–41. http://dx.doi.org/10.1515/jag-2020-0053.

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Abstract We analyze the Global Positioning System (GPS)-derived strain rate distribution to investigate active crustal structure in Central Java, Indonesia, using ten years (2010–2019) continuous and permanent observation data. Central Java is the third-most populous province in Indonesia where postseismic deformation of devastating Yogyakarta earthquake in 2006 might influence the GPS data. The postseismic extensional response might overshadow the low contractional process due to active tectonics deformation. A decomposition method of a calculated strain rate shows a long wavelength feature w

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Suwondo, Suwondo, Mill Sartika Indah, Afzalurrahman Assalam, Muhammad Nafian, and Andika Perbawa. "Lithofacies Interpretation Of Sediment Rocks In The Cipamingkis River Outcrop, Jonggol Area, Bogor District, West Java." Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics 6, no. I (2023): 60–70. http://dx.doi.org/10.15408/fiziya.v6ii.34282.

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This research aims to study sedimentary structures and determine the depositional environment of the outcrop in the Cipamingkis River, Jonggol area, Bogor Regency, West Java. The method in this study includes literature studies, field surveys, data interpretation, and facies analysis. The result shows the outcrop in the Cimangkis River can be divided into four (4) sedimentation sequences unit: Claystone Unit (Sequence 1), Limestone/Calsirudit Unit (Sequence 2), Limestone/calcarenite-Calcilutite Unit (Sequence 3), Mudstone/ Calsilutite Unit (Sequence 4). Based on the depositional environment an

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Tejakusuma, Iwan Gunawan. "SOIL CREEP IN BALEKAMBANG, CIRAWAMEKAR, CIPATAT DISTRICT, BANDUNG BARAT REGENCY, WEST JAVA." Jurnal Sains dan Teknologi Mitigasi Bencana 13, no. 2 (2019): 96. http://dx.doi.org/10.29122/jstmb.v13i2.3369.

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Soil creep occurred in Balekambang, Cirawamekar, Cipatat, West Bandung Regency, West Java. This area is karst hill consist of limestone with interbedded sediment in the valley. The limestone is interfingered with clay, marl and quartz sandstones. The clay and marl acting as the slipping plane with a steep dip of around 50o to 69o to the northwest. The direction of the slope movement approximately follows the direction of the bedding plane therefore the bedding plane control the soil creep. This landslide was triggered by rainfall which saturated the soil layer and environmental changes in the

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Lelono, Eko Budi. "Oligocene Palynology Of On-Shore West Java." Scientific Contributions Oil and Gas 35, no. 2 (2022): 67–82. http://dx.doi.org/10.29017/scog.35.2.779.

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Compared to its counterpart in the off-shore area (including Northwest Java and Northeast Java), the Oligocene sediment of on-shore West Java provides low pollen assemblages. In addition, superwet elements of Dacrydium and Casuarina commonly occurred in off-shore area are less represented in the on-shore area. However, it is believed that the study area still experienced wet climate condition as proved by common occurrence of rattan pollen Dicolpopollis spp. indicating a thick growth of swamp forest under moist climate. Unlike its counterpart in the off-shore North West Java, the studied sedim

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Sachoemar, Suhendar. "VARIABILITY OF SEA SURFACE CHLOROPHYLL-A, TEMPERATURE AND FISH CATCH WITHIN INDONESIAN REGION REVEALED BY SATELLITE DATA." Marine Research in Indonesia 37, no. 2 (2015): 75–87. http://dx.doi.org/10.14203/mri.v37i2.25.

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The investigation of sea surface chlorophyll-a (SSC) and sea surface temperature (SST) in relation to fish catch variability within the Indonesian region were conducted by using satellite data of NOAA-AVHRR, SeaWiFs and Aqua MODIS. The investigation focused in the region of the coastal area of Java, Lampung Bay and South Kalimantan as representation of the environment diversities of the Indonesian seas.Â The result shows that seasonal variation in fish productivity has a strong correlation with SSC variability. High fish productivity corresponded well with high concentration of SSC, and the pr

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16

Syahputra, Reza, Felix Muria Hasudungan Sihombing, and Octria Adi Prasojo. "Correlation Between Fracture Azimuth, Surface Lineaments and Regional Tectonics: A case study from Belik District, Central Java, Indonesia." Journal of Geoscience, Engineering, Environment, and Technology 4, no. 1 (2019): 22. http://dx.doi.org/10.25299/jgeet.2019.4.1.2294.

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Two major strike-slip faults with northeast-southwest and northwest-southeast orientation have shifted the southern Central Java, including Belik District. Consequently, many smaller faults that have the same direction as the major faults and west-east direction folding systems were emerged. The orientation of these geologic structures could be observed from morphological features such as ridge and river. A quantitative approach was carried out to unravel the impacts of those geologic structures on the geomorphology of the study area, which is located between Slamet Mountain and Sindoro Mounta

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Apriansyah, Agus S. Atmadipoera, Dwiyoga Nugroho, and Rinda Noviyanti. "Shelf oceanography and small pelagic fishes in the Java Sea." E3S Web of Conferences 483 (2024): 01010. http://dx.doi.org/10.1051/e3sconf/202448301010.

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The optimization of small pelagic fisheries in the Java Sea could be enhanced by providing oceanographic information for analysis and determining potential fishing grounds. This study aims to investigate shelf oceanographic factors influencing small pelagic fisheries using multidatasets of sea surface temperature and surface salinity CROCO ocean model output (2010 – 2020), distribution of light-fishing vessel position of VIIRS satellite, and small pelagic fish catches landing data (round scads Decapterus spp. and the spotted sardinella Amblygaster sirm) at Pekalongan Fishing Port, Central Java

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18

Yuliana, Yuliana, Tasari Tasari, Anita Setiyaningsih, Fika Aisyah Munif, and Miftacha Febriani Putri. "Optimalisasi Biaya Transportasi Produk UMKM Naturies Indonesia Dengan Metode Northwest Corner Dan Vogel’s Approximation." Jurnal Derivat: Jurnal Matematika dan Pendidikan Matematika 9, no. 2 (2022): 246–57. http://dx.doi.org/10.31316/jderivat.v9i2.3138.

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Naturies Indonesia is one of the UMKM for spice drinks in Macanan, Klaten, Central Java which is developing. As one of the growing UMKM, Naturies Indonesia is experiencing problems related to the distribution of its products. Naturies Indonesia has incurred transportation costs of Rp.442,100.00 per week in distributing its products to 5 distributors (Kudus, Jakarta, Shopee, Bandung, and offline). Due to human resource constraints, Naturies Indonesia does not yet have a thorough plan to reduce shipping costs in allocating products from production sites to customers or distributors. Through this

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Maulida, Putra, Muhammad Rafiq, Yola Asis Herawati, Akbar Kurniawan, and Muhammad Taufik. "Current deformation in eastern part of Java derived from GPS observation 2017-2022." IOP Conference Series: Earth and Environmental Science 1276, no. 1 (2023): 012023. http://dx.doi.org/10.1088/1755-1315/1276/1/012023.

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Abstract The eastern part of Java Island is a prone area with high seismic potential. Geologically, the seismicity in this area is dominated by the subduction zone in southern Java, reverse faults structure in the north extending along east to west part of Java Islands, and normal faults in Pasuruan and Probolinggo. Several studies have indicated the potential of earthquakes associated with these sources. The geodetic technique is employed to monitor the deformation activity in the eastern part of Java to understand the characteristics. We utilized the continuous GPS stations operated by Geosp

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Lelono, Eko Budi. "Gondwanan Palynomorphs From The Paleogene Sediments Of East Java The Evidence Of Earlier Arrival." Scientific Contributions Oil and Gas 30, no. 2 (2022): 1–12. http://dx.doi.org/10.29017/scog.30.2.864.

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The palynological investigation of the Paleogene sediments is based on cutting samples collected from the exploration wells which are drilled in East Java area. The occurrence of pollen Meyeripollis naharkotensis and spore Cicatricosisporites dorogensis in the upper well sections suggests the pollen zone of Meyeripollis naharkotensis which is equivalent to Oligocene age. Meanwhile, the occurrence of pollen Proxapertites operculatus and spore Cicatricosisporites eocenicus below Meyeripollis naharkotensis zone indicates the appearance of Proxapertites operculatus zone within the lower sections w

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21

Irawan, Sudra, and Muhammad Zainuddin Lubis. "Geology Structure Identification Using Pre-Stack Depth Migration (PSDM) Method of Tomography Result in North West Java Basin." Journal of Geoscience, Engineering, Environment, and Technology 2, no. 2 (2017): 117. http://dx.doi.org/10.24273/jgeet.2017.2.2.297.

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North West Java Basin is a tertiary sedimentary basin which is located in the right of the western part of the Java island. North West Java Basin is geodynamic where currently located at the rear position of the path of the volcanic arc of Java that is the result of the India-Australia plate subduction to the south towards the Eurasian plate (Explanation of Sunda) in the north. Geology structure observation is difficult to be conducted at Quaternary volcanicfield due to the classical problem at tropical region. In the study interpretation of fault structures can be done on a cross-section of P

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22

KNIGHT, G. ROGER. "Exogenous Colonialism: Java Sugar between Nippon and Taikoo before and during the Interwar Depression, c. 1920–1940." Modern Asian Studies 44, no. 3 (2009): 477–515. http://dx.doi.org/10.1017/s0026749x08003727.

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AbstractThis paper discusses the commercial history of the Java sugar industry in the interwar decades of the 1920s and 1930s. Java's late colonial industry had a uniquely exogenous character, in that, amongst the world's major producers of cane sugar in the late colonial era, it was singularly devoid of metropolitan or quasi-metropolitan markets. Instead, it sought its markets pre-eminently on the Asian ‘mainland’ to its north and northwest. The Indian subcontinent formed one such market, but East Asia formed the second, and it is the Java industry's fortunes in China and Japan that provide t

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23

Setyawan, Agus, Agnis Triahadini, Yayan Yuliananto, Yoga Aribowo, and Dian Agus Widiarso. "Subsurface Structure and Fluid Flow Analysis Using Geophysical Methods in the Geothermal Manifestation Area of Paguyangan, Brebes, Central Java." International Journal of Renewable Energy Development 5, no. 3 (2016): 171–77. http://dx.doi.org/10.14710/ijred.5.3.171-177.

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The indication of an active geothermal system is shown by the presence of surface manifestations such as the hot spring in Kedungoleng, Paguyangan, Brebes, Central Java. The temperature of the largest hot spring reaches 74o C and there is an assumption that this is an outflow of Mount Slamet geothermal system. DC-resistivity, Spontaneous Potential (SP) and Shallow Surface Temperature surveys were conducted to determine the subsurface structure as well as its correlation with the distribution of thermal fluid flow and shallow surface temperature. The subsurface resistivity has been investigated

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Hisan, Nazwa Khoiratun, Ludovikus Damardika Jasaputra, and Pius Artdanno Bernaldo. "Hydrostructure of Groundwater Manifestation of Gedongsongo Geothermal Ungaran, Semarang, Central Java, Indonesia." Journal of Earth and Marine Technology (JEMT) 1, no. 1 (2020): 31–39. http://dx.doi.org/10.31284/j.jemt.2020.v1i1.1150.

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Groundwater is an important element of the hydrological cycle in geothermal systems. The geological structure of the Plio-Pleistocene volcano and different lithological variations affect the type and response of groundwater to rocks. The research area is located around the Gedongsongo Temple complex, Mount Ungaran, Central Java. Based on the field check location, there are three variations of lithology, the first lithology is a breccia with andesite, basalt, and pyroclastic fragments. The NW-SE-oriented geological structure is flattened to the right slip fault which is the fracture aquifer sys

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Nuha, Dafiqiy Ya'lu Ulin, Sukir Maryanto, and Didik Rahardi Santoso. "DETERMINATION OF THE DIRECTION OF HOT FLUID FLOW IN CANGAR AREA, ARJUNO-WELIRANG VOLCANO COMPLEX, EAST JAVA USING SELF POTENTIAL METHOD." Jurnal Penelitian Fisika dan Aplikasinya (JPFA) 7, no. 2 (2017): 123. http://dx.doi.org/10.26740/jpfa.v7n2.p123-132.

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Research with self potential method has been done in Cangar area of Arjuno-Welirang volcano complex, East Java. The purpose of this study was determined the direction of hot fluid flow. This hot fluid forms a geothermal manifestation of hot springs. Data acquisition has been done using fixed electrode configuration with interval 5 meters in 5 lines. In this configuration there are two porous pot electrodes, one of them set in fixed station and the other as mobile station. Based on the potential distribution value of the isopotential map, the lowest potential value about -54,5 mV and the highes

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Hafiz, Surya Darma, Ahmad Helman Hamdani, Budi Muljana, and Moeh Ali Jambak. "Effect of diagenetic events on limestone reservoir quality: Case study of Parigi formation, Northwest Java basin." BIO Web of Conferences 73 (2023): 04009. http://dx.doi.org/10.1051/bioconf/20237304009.

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Limestone is a sedimentary rock with high heterogeneity. This is triggered by diagenetic processes that affect the quality of limestone during its formation. The high uncertainty in limestone porosity values is also influenced by diagenetic processes. The Parigi Formation is a carbonate rock located in the Northwest Java Basin and has been proven to be a carbonate reservoir rock. Petrographic analysis was conducted to observe the appearance resulting from diagenetic processes. The studied area's limestone has two facies: clastic facies and reef facies. The limestone of clastic facies is white

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Mandal, Samiran, Raden Dwi Susanto, and Balaji Ramakrishnan. "On Investigating the Dynamical Factors Modulating Surface Chlorophyll-a Variability along the South Java Coast." Remote Sensing 14, no. 7 (2022): 1745. http://dx.doi.org/10.3390/rs14071745.

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Twelve years of remotely sensed all-sat merged chlorophyll-a concentration unveils strong signatures of chlorophyll-a blooms along the south Java coast. An unprecedented three-times increase in chlorophyll-a concentration is significantly observed along the south Java coast during the southeast monsoon (June–October) than the northwest monsoon (December–April). The multiple regression analysis of dynamic factors evidently indicates that seasonal upwelling is predominantly controlled by the seasonally evolving coastal eddies associated with the seasonally reversing south Java coastal currents (

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Hakim, Bagus Iqbal, Udi Harmoko, and Sugeng Widada. "GROUNDWATER FLOW PATTERN AROUND GONOHARJO HOT SPRING, KENDAL REGENCY, CENTRAL JAVA." Cognizance Journal of Multidisciplinary Studies 3, no. 11 (2023): 196–204. http://dx.doi.org/10.47760/cognizance.2023.v03i11.013.

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The Ungaran Mountain is a stratovolcano-type volcano with a geothermal system. On the northern side of Mount Ungaran, there are hot springs located in the Gonoharjo area, Kendal Regency, Central Java, Indonesia. These hot springs appear on the mountain slopes and are very close to the surface water. This research aims in analyzing the pattern of groundwater flow with surface water flow around the springs and identifying the relationship that occurs between the springs and the nearest river flow. Analysis of the groundwater flow pattern can be determined based on groundwater level contour maps

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29

Dewanto, Ordas, Rahmat Catur Wibowo, Darsono, and Aryka Claudia Eka Putri. "The implementation of well logging method, geochemical analysis, and seismic method to determine source rock potentials at field “X”, Northeast Java Basin." Journal of Physics: Conference Series 2498, no. 1 (2023): 012050. http://dx.doi.org/10.1088/1742-6596/2498/1/012050.

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Abstract East Java is an area with the potential to produce oil and gas. Oil and gas are hydrocarbon mix produced from the subsurface, sourced from matured organic materials, and migrated to be drilled to be produced into oil and gas. The methods to explore oil and gas are well logging and seismic methods. Combining both methods can obtain vertical and horizontal subsurface information. The study was performed by analyzing secondary data processing results of wells, seismic data, and ko chemistry data. Geochemical data were used to analyze source rock potentials in the study area. Source rock

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Sidik, Firdos Bahar, Rama Wahyu Nurawi, Haris Muhlisin, Wrego Seno Giamboro, and Wahyu Hidayat. "Identification of Andesite Rocks Using Dipole-Dipole Geoelectric Method in Batursari Subdistrict, Pekalongan Regency, Central Java." East Asian Journal of Multidisciplinary Research 2, no. 10 (2023): 4149–60. http://dx.doi.org/10.55927/eajmr.v2i10.6459.

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A study has been conducted to identify andesite rocks using the dipole-dipole geoelectric resistivity method in the Batursari Subdistrict, Pekalongan Regency, Central Java Province. Measurements were taken along 12 Lines stretching from northwest to southeast, with a Line length of 280 m and electrode spacing of 10 m. The aim of this research was to model the 2D resistivity value Line of the path, determine the type of andesite rock, and assess the depth of the rock in the study area. Based on data processing results, four lithology units were identified: resistivity values ranging from 0 to 1

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Cai, Wenju, Harry H. Hendon, and Gary Meyers. "Indian Ocean Dipolelike Variability in the CSIRO Mark 3 Coupled Climate Model." Journal of Climate 18, no. 10 (2005): 1449–68. http://dx.doi.org/10.1175/jcli3332.1.

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Abstract Coupled ocean–atmosphere variability in the tropical Indian Ocean is explored with a multicentury integration of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) Mark 3 climate model, which runs without flux adjustment. Despite the presence of some common deficiencies in this type of coupled model, zonal dipolelike variability is produced. During July through November, the dominant mode of variability of sea surface temperature resembles the observed zonal dipole and has out-of-phase rainfall variations across the Indian Ocean basin, which are as large as those

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Putra, D. R., N. M. N. Natih, and A. Purwandana. "Seasonal variation of mixed layer depth and thermocline thickness from the ctd argo float data in the Southern Makassar Strait." IOP Conference Series: Earth and Environmental Science 1137, no. 1 (2023): 012010. http://dx.doi.org/10.1088/1755-1315/1137/1/012010.

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Abstract The Makassar Strait (MS) is directly connected to the Sulawesi Sea in the north and the Java Sea and the Flores Sea in the south and is the main route of Indonesia Throughflow(ITF). Hence Stratification of water mass in the MS is influenced by the dynamics of these waters. This study aims to describe seasonal variations of the mixed layer depth and the thermocline thickness, identify ITF water masses, and the occurrence of coastal upwelling in the southern part of the MS. The results show that the North Pacific water origin of North Pacific Subtropical Water (NPSW) and North Pacific I

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Vermeij, Geerat J., and Han Raven. "Southeast Asia as the birthplace of unusual traits: the Melongenidae (Gastropoda) of northwest Borneo." Contributions to Zoology 78, no. 3 (2009): 113–27. http://dx.doi.org/10.1163/18759866-07803003.

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In this paper the Miocene to recent melongenid species of northwest Borneo are discussed. The recent fauna is poor with three genera represented by one species each. In the Miocene three (possibly four) genera occur with eight (possibly nine) species of which three are described as new species: Melongena murifactor, uniquely characterized by the formation of a septum walling off the adapical sector of the aperture; Pugilina erecta, characterized (along with its close Miocene relative from Java, P. ickei) by a free-edged, erect inner lip; Volema goliath, large for the genus with later whorls pr

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Semedi, Bambang, Hardoko Hardoko, Citra Satrya Utama Dewi, Nova Dewi Safitri Syam’s, Novia Fara Diza, and Gerardus David Ady Purnama Bayuaji. "Seasonal Migration Zone of Skipjack Tuna (Katsuwonus pelamis) in the South Java Sea Using Multisensor Satellite Remote Sensing." Journal of Marine Sciences 2023 (July 7, 2023): 1–14. http://dx.doi.org/10.1155/2023/1073633.

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Skipjack tuna (Katsuwonus pelamis) is the most dominating tuna species caught in the Indian Ocean. However, tuna fishermen in the Indian Ocean still face difficulties determining potential skipjack tuna fishing grounds due to limited geographic information. An attempt to improve information regarding potential skipjack tuna fishing grounds is through modeling the SST, SSC, SSH, and SSS oceanographic parameters with skipjack tuna distribution using GIS. The characteristics of the skipjack tuna habitat can be found through the generalized additive model (GAM) statistical analysis using data of s

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Jordaan, Roy, and Brian Colless. "The Ratu Boko Mantra And The Sailendras." Berkala Arkeologi 24, no. 1 (2004): 56–64. http://dx.doi.org/10.30883/jba.v24i1.894.

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The Ratu Boko (or Ratu Baka) plateau, near Yogyakarta in southern central Java, is surrounded by an impressive array of Hindu and Buddhist shrines. Notable among these are the Prambanan temples to the north, and Candi Kalasan to the west, with the massive Borobudur stupa 40 kilometres to the northwest, and the lofty volcanoes Merapi and Merbabu towering over the northern landscape. The presence of dynamic mountains and Buddhist monuments makes the Ratu Boko heights an ideal spot for locating the lost palace of the Sailendra 'mountain lords', though they may well have resided on the plain or in

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Hall, G. B., F. Wang, and Subaryono. "Comparison of Boolean and Fuzzy Classification Methods in Land Suitability Analysis by Using Geographical Information Systems." Environment and Planning A: Economy and Space 24, no. 4 (1992): 497–516. http://dx.doi.org/10.1068/a240497.

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In this paper the information content of Boolean and fuzzy-set-based approaches to the problem of analyzing land suitability for agriculture within a geographical information system (GIS) is assessed. First, the two approaches to this problem are stated and formalized in the context of land-suitability evaluation. A database comprising 642 unique areas, 7 land qualities, 13 land characteristics, and 2 crop types is defined and described. Land-use suitability ratings for two crops, wetland rice and soybean, are generated by using Boolean and fuzzy methods. Results produced by the two methods ar

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Taryana, Didik, Rudi Hartono, Dicky Arinta, Agus Purnomo, and Ike Sari Astuti. "Landslide Movement of Bendungan District Trenggalek Using an Artificial Neural Network." Environmental Research, Engineering and Management 79, no. 3 (2023): 95–107. http://dx.doi.org/10.5755/j01.erem.79.3.33628.

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Landslide is one of the disasters that often occurs in Indonesia in the East Java Province, especially in Bendungan District, Trenggalek Regency. Analysis of landslide susceptibility in Bendungan District is needed to spatially locate the landslide occurrences. The purpose of this study was to predict landslide events using an artificial neural network. Rainfall, topography, physical soil properties, and land-use were used as the explanatory variables. An analytic hierarchy process approach was applied to determine the weight of the variables. The model satisfactorily classified the landslide

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Hamzah, F. "Nitrate and phosphate profiles in the Banda Sea during the northwest monsoon." IOP Conference Series: Earth and Environmental Science 1163, no. 1 (2023): 012002. http://dx.doi.org/10.1088/1755-1315/1163/1/012002.

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Abstract The Banda Sea (BS) is subjected to monsoonal winds that affected upwelled rich nutrient waters and primary production. However, nutrient characteristic in the region is less constrained. Here, we examine nitrate and phosphate profiles in the Banda Sea from data collected during the northwest monsoon. Waters along the surface density (σθ ) < 22 were dominated by less saline originating from western Indonesia (i. e., Java Sea), accompanied by Indonesian throughflow water Banda (23.0-25.0σθ ) and Banda water (26.5-27.0σθ ), respectively. Surface water was accompanied by low nitrite+ni

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Abimanyu, Amarif, Widodo S. Pranowo, Ibnu Faizal, Najma K. A. Afandi, and Noir P. Purba. "Reconstruction Of Oil Spill Trajectory In The Java Sea, Indonesia Using Sar Imagery." GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY 14, no. 1 (2021): 177–84. http://dx.doi.org/10.24057/2071-9388-2020-21.

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Oil spill phenomena in the ocean possess a very serious threat to ocean health. On the ocean surface, oil slicks immediately start to spread and mostly end up in the ecosystem. Furthermore, it could threaten the organisms living in the ocean or impact nearby coastal area. The aim of this research was to investigate the trajectories of oil spill based on a real accident in the Java Sea. Tracking oil spills using satellite images is an efficient method that provides valuable information about trajectories, locations and the spread intensity. The objective of this study was to periodically track

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Mulyana, Erwin. "ANALISIS CUACA PADA SAAT PELAKSANAAN TMC PENANGGULANGAN BANJIR JAKARTA JANUARI FEBRUARI 2014." Jurnal Sains & Teknologi Modifikasi Cuaca 16, no. 1 (2015): 15. http://dx.doi.org/10.29122/jstmc.v16i1.2634.

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AbstrakPada tanggal 11 Januari sampai dengan 14 Februari 2014 telah dilaksanakan penerapan teknologi modifikasi cuaca (TMC) untuk menanggulangi banjir di wilayah Jakarta dan sekitarnya. Selama kegiatan tersebut fenomena ENSO dan IOD dalam kondisi normal. MJO menunjukkan aktifitas konvektif netral di wilayah Indonesia pada pertengahan Januari hingga pertengahan Februari 2014. Temperatur permukaan laut di perairan Jawa bagian barat sekitar 28-290C. Kelembagan udara pada level 850 mb sekitar 70-80%. Pertumbuhan awan umumnya berada di sebelah barat daya, barat dan barat laut Jakarta. Indeks Monsoo

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Itsnaini, Nur, Doni Prakasa Eka Putra, and I. Gde Budi Indrawan. "Hydrogeological and hydrochemical condition in planned tunnel B route of the Yogyakarta-Bawen toll road." E3S Web of Conferences 479 (2024): 02007. http://dx.doi.org/10.1051/e3sconf/202447902007.

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The Yogyakarta-Bawen toll road tunnel, located in Magelang Regency, Central Java Province, is a national strategic project that connects Central Java and the Special Region of Yogyakarta. It has geology resulting from volcanic processes, resulting in rocks with moderate aquifer properties and low to moderate permeability. The study covers 24 observation points, with 11 locations sampling groundwater for chemical analysis. The analysis results of hydrochemical facies are Na-K-HCO3. Water table depth varies from 623 m to 704 m above sea level, with the water table along the tunnel route at depth

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Yatini, Y., M. Faizal Zakaria, and Imam Suyanto. "Identification of Gold Mineralization Zones Using Magnetic Data at Gunung Gupit Area, Magelang, Central Java." RSF Conference Series: Engineering and Technology 1, no. 1 (2021): 305–12. http://dx.doi.org/10.31098/cset.v1i1.384.

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Indonesia is one of the biggest gold producing countries in the world. the discovery of new gold reserves makes the passion of the gold mining industry increase. The Gunung Gupit area of Magelang Regency in Central Java has discovered new gold potential, but has not been thoroughly explored. The magnetic method is applied to identify and determine the distribution of the presence of gold mineralized zones based on the magnetic properties of rocks. A total of 1001 points on 41 magnetic line were acquired using Proton Precession Magnetometer (PPM) Geometrics model G-856 in an area of 2.5 km2. Fi

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Kurniawan, Firman Heru, Margareta Rahayuningsih, Nugroho Edi Kartijono, and Muhammad Abdullah. "EVALUATION ON THE POPULATION OF STRANGLER FIGS (Ficus subgen. Urostigma) IN MOUNT UNGARAN, CENTRAL JAVA." Media Konservasi 27, no. 3 (2022): 83–90. http://dx.doi.org/10.29244/medkon.27.3.83-90.

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A group of the Ficus genus, the strangler figs (Ficus subgen, Urostigma), are known as a more potential as frugivores feed in Mount Ungaran. While the land clearance of the forest into monoculture plantation threats their existence. This study aims to evaluating strangler figs condition by the population study, i.e. densities, distribution, and the demography of each strangler fig species. A total of 25 ha area of Gentong Hill (Northwest part of Mount Ungaran) have been sampled during January-May 2018. We conducted a census of the figs within the sampled area and recorded their life stages in

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Pangestu, Dany, Ratih Suci Ramadhanti, and Ahmad Fadlan. "PEMETAAN POTENSI PEMUTIHAN KARANG DI PERAIRAN INDONESIA MENGGUNAKAN ANALISIS DATA SUHU PERMUKAAN LAUT." Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 3 (February 28, 2019): 65. http://dx.doi.org/10.20961/prosidingsnfa.v3i0.28512.

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<p class="AbstractEnglish"><strong>Abstract:</strong> Indonesia is the country that contributed the largest coral reefs, about 18% total of the entire the world. Area of coral reef in Indonesia known as the “Coral Triangle”. This ecosystem has high ecology and economic value. The existence of the coral reefs is the main attraction for a tourism destination. However, the function and role of these ecosystems are decreasing due to natural factors and artificial factors. One of the natural factors is due to the influence of global warmings, such as sea surface temperature (SST),

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Widagdo, Asmoro, I. Gde Sukadana, and Frederikus Dian Indrastomo. "Geological Structure Control on the Formation of Metal Mineralization at Quartz Veins in Jendi Village, Wonogiri Regency, Central Java." EKSPLORIUM 43, no. 2 (2023): 89. http://dx.doi.org/10.17146/eksplorium.2022.43.2.6623.

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Quartz veins in the Jendi area and its surroundings are formed by geological structures with distributions and patterns that need to be known. This study uses data on striation, quartz vein orientation, and metal content in quartz veins. The use of this data aims to determine the relationship between the vein direction pattern and its metal mineral content with the main structure that forms it. The results of this study can be useful in determining the structural model and distribution of veins in the study area. The research method was carried out through a series of field and laboratory work

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Reza, Teuku, Lilik Eko Widodo, Irwan Iskandar, Rusmawan Suwarman, and Boy Yoseph CSSSA. "Physical Soil Parameter and Resistivity Profile in the Vadose Zone: Preliminary Result of Groundwater Recharge Study." BIO Web of Conferences 73 (2023): 05023. http://dx.doi.org/10.1051/bioconf/20237305023.

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In tropical-volcanic-dominated areas, such as Java Island in Indonesia, aquifer recharge is highly impacted by rainfall intensity and soil characteristics. The first stage of recharge begins with the soil surface's response to rainwater until it percolates to the deep layer. The primary objective of this research was to study groundwater recharge processes from the soil surface to deep percolation in the volcanic deposit at the northwest flank of Mount Pangrango, West Java, Indonesia. The present study also includes the 2D geoelectrical survey results combined with the soil core drilling. A ve

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Indah, M. S., Abdul Haris, and M. Natsir. "Integrated of Sequences Seismic Stratigraphy, Accoustic Impedance Invertion, and Petrophysical for Resources Exploration in Offshore Southern Ardjuna Northwest Java Basin, Indonesia." IOP Conference Series: Materials Science and Engineering 546 (June 26, 2019): 072002. http://dx.doi.org/10.1088/1757-899x/546/7/072002.

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Mulyana, Erwin. "ANALISIS CUACA SELAMA KEGIATAN TMC REDISTRIBUSI CURAH HUJAN." Jurnal Sains & Teknologi Modifikasi Cuaca 14, no. 1 (2013): 13. http://dx.doi.org/10.29122/jstmc.v14i1.2677.

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IntisariPada tanggal 26 Januari sampai dengan 27 Februari 2013 telah dilaksanakan penerapan teknologi modifikasi cuaca (TMC) untuk redistribusi curah hujan di wilayah Jakarta dan sekitarnya. Selama kegiatan tersebut fenomena ENSO dan IOD dalam kondisi normal. MJO menunjukkan adanya peningkatan aktifitas konvektif di wilayah Indonesia pada pertengahan hingga akhir bulan Februari 2013. Temperatur permukaan laut di perairan sekitar Jawa bagian barat sekitar 29-300C. Kelembagan udara pada level 850 mb sekitar 75-80%. Pertumbuhan awan umumnya berada di sebelah barat laut hingga barat daya Jakarta.A

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Putra, I. Nyoman Januarta Triska, I. Wayan Gede Astawa Karang, and I. Dewa Nyoman Nurweda Putra. "Analisis Temporal Suhu Permukaan Laut di Perairan Indonesia Selama 32 Tahun (Era AVHRR)." Journal of Marine and Aquatic Sciences 5, no. 2 (2019): 234. http://dx.doi.org/10.24843/jmas.2019.v05.i02.p11.

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One of the important factor that influences global climate dynamics is sea surface temperature (SST). Indonesian waters are semi-closed and located between the Pacific and Indian Oceans so that they have different characteristics of SPL in each region. The purpose of this research is to know the trend and local characteristics of Indonesian SST and adjacent areas in response to 6-monthly and seasonal variability with moving average method and correlation. The data used are SST data from AVHRR satellite with domain 15°N-15°S, 90°-145° E. The results showed of increase trend 0.34°C in Indonesian

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Nurhasan, Muhammad Nadhif Rizqia, Hidayat, et al. "Identification of Geological Structure Based on Gravity Method in Tangkuban Parahu Volcano, Bandung, Indonesia." IOP Conference Series: Earth and Environmental Science 1159, no. 1 (2023): 012006. http://dx.doi.org/10.1088/1755-1315/1159/1/012006.

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Abstract Tangkuban Parahu Volcano, located in Cikahuripan, Lembang, West Bandung Regency, West Java, Indonesia, has a geothermal potential. However, this potential is accompanied by geohazard risks, one of which is a volcanic eruption that can interfere with the development of geothermal potential. On February 12, 2022, there was a gust of volcanic gas from Ratu Crater, indicating an increase in volcanic activity after an eruption in 2019. Based on the geological map of Tangkuban Parahu/Sunda Volcano Complex, it is estimated that there is a fault structure in a northwest-southeast direction, w

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