• Title/Summary/Keyword: Java Sea

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Estimation of sea level variations of the Java Sea during the ENSO period using the HYCOM

  • Sofian, Ibnu;Kozai, K.;Ohsawa, T.
    • Proceedings of the KSRS Conference
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    • v.2
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    • pp.744-747
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    • 2006
  • The sea level of the Java Sea is reproduced using HYbrid Coordinate Ocean Model (HYCOM) setting up in the horizontal grid from $100^{\circ}E$ to $125^{\circ}E$ and from $10^{\circ}S$ to $8^{\circ}N$. The model is initialized by ocean temperature and salinity profiles from Levitus 1998 and forced by the atmospheric field derived from NCEP reanalysis. In this research HYCOM is applied to explain the El $Ni{\tilde{n}}o$ Southern Oscillation (ENSO) impacts on the sea level of the Java Sea. The monthly tide gauge sea level data are produced based on hourly sea level data from 1993 to 1997. Altimeter sea level data are based on weekly merged products between TOPEX/Poseidon and ERS absolute dynamic topography (ADT). The simulated sea level both HYCOM and ADT agree well with the tide gauge sea level. The sea level of the Java Sea is high during the La $Ni{\tilde{n}}a$ period and low during the El $Ni{\tilde{n}}o$ period.

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Fishing Explorations for Tunas and Demersal Fish in Indonesia Waters (인도네시아근해의 참치 및 저서어 어장 개발시험)

  • 임기봉
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.10 no.1
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    • pp.19-29
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    • 1974
  • Fishing explorations for tunas and demersal fish on the sea south west from Sumatra, south sea from Java, south sea from Bali and south sea from Soemba were carried out in 1973 by MIS TaeBeak-San (310 tons, 8001P) of Fisheries Research & Development Ageney, R. O. K. The results were found to be valuable for good fishing ground for tunas and demesal fishes.

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A tidal model of Southwestern Asia Sea (남서 아시아해역의 조석 모형)

  • 김덕구;김동훈;최병호
    • Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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    • 1995.10a
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    • pp.122-128
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    • 1995
  • 전회의 연구(최와 고, 1994)에서 1/6$^{\circ}$ 경.위도 해상도를 갖는 동아시아 해역의 8개 분조의 조석체계를 수치 시뮬레이션으로 산정하였다. 본 연구에서는 DBDBS database의 5분 격자 해상 수심을 그대로 적용하는 5분 격자 체재의 Gulf of Siam(Thailand), 남중국해, 자바해(Java Sea)를 포함하는 모형을 수립하였다. 서측경계는 Malacca해협의 서측안이며 북측 경계는 대만 해협, 동측경계는 대만남측-루손섬북측, 만다나오남측과 Celebes(Sulawesi)의 북동단의 Manado, Celebes섬의 Makasar부근과 Flores섬의 북단을 연결하는 5개소의 개방 경계를 택하였다. (중략)

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S-velocity and Radial Anisotropy Structures in the Western Pacific Using Partitioned Waveform Inversion (분할 파형 역산을 사용한 서태평양 지역 S파 속도 및 방사 이방성 구조 연구)

  • Ji-hoon Park;Sung-Joon Chang;Michael Witek
    • Economic and Environmental Geology
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    • v.56 no.4
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    • pp.365-384
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    • 2023
  • We applied the partitioned waveform inversion to 2,026 event data recorded at 173 seismic stations from the Incorporated Research Institutions for Seismology Data Managing Center and the Ocean Hemisphere network Project to estimate S-wave velocity and radial anisotropy models beneath the Western Pacific. In the Philippine Sea plate, high-Vs anomalies reach deeper in the West Philippine basin than in the Parece-Vela basin. Low-Vs anomalies found at 80 km below the Parece-Vela basin extend deeper into the West Philippine Basin. This velocity contrast between the basins may be caused by differences in lithospheric age. Low-Vs anomalies are observed beneath the Caroline seamount chain and the Caroline plate. Overall positive radial anisotropy anomalies are observed in the Western Pacific, but negative radial anisotropy is found at > 220 km depth on the subducting plate along the Mariana trench and at ~50 km in the Parece-Vela basin. Positive radial anisotropy is found at > 200 km depth beneath the Caroline seamount chain, which may indicate the 'drag' between the plume and the moving Pacific plate. High-Vs anomalies are found at 40 ~ 180 km depth beneath the Ontong-Java plateau, which may indicate the presence of unusually thick lithosphere due to underplating of dehydrated plume material.

Teleseismic Travel Time Tomography for the Mantle Velocity Structure Beneath the Melanesian Region (원거리 지진 주시 토모그래피를 이용한 멜라네시아 지역의 맨틀 속도 구조 연구)

  • Jae-Hyung Lee;Sung-Joon Chang
    • Economic and Environmental Geology
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    • v.57 no.1
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    • pp.1-15
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    • 2024
  • The Melanesian region in the western Pacific is dominated by complex plate tectonics, with the largest oceanic plateau, the OntongJava plateau, and a hotspot, the Caroline Islands. To better understand the complex geodynamics of the region, we estimate P- and S-velocity models and 𝛿 (VP/VS) model by using relative teleseismic travel times measured at seismometers on land and the seafloor. Our results show high-velocity anomalies in the subduction zones of the Melanesian region to a depth of about 400 km, which is thought to be subducting Solomon Sea, Bismarck, and Australian plates along plate boundaries. Along subduction zones, positive 𝛿 (VP/VS) anomalies are found, which may be caused by partial melting due to dehydration. A broad high-velocity anomaly is observed at 600 km depth below the Ontong-Java plateau, with a negative 𝛿 (VP/VS) anomaly. This is thought to be a viscous and dry remnant of the Pacific plate that subducted at 45-25 Ma, with a low volume of fluids due to dehydration for a long period in the mantle transition zone. Beneath the Caroline Islands, a strong low-velocity anomaly is obseved to a depth of 800 km and appears to be connected to the underside of the remnant Pacific plate in the mantle transition zone. This suggests that the mantle plume originating in the lower mantle has been redirected due to the interaction with the remnant Pacific plate and has reached its current location. The mantle plume also has a positive 𝛿 (VP/VS) anomaly, which is thought to be due to the influence of embedded fluids or partial melting. A high-velocity anomaly, interpreted as an effect of the thick lithosphere beneath the Ontong-Java plateau, is observed down to 300 km depth with a negative 𝛿 (VP/VS) anomaly, which likely indicate that little fluid remains in the melt residue accumulated in the lithosphere.

Discovery of the Ten Species of Subtropical-moths in Is. Daecheong, Korea (서해(西海) 대청도(大靑島)에서 발견된 아열대성(亞熱帶性) 나방류 10종)

  • Park, Kyu-Tek;Kang, Tae-Min;Kim, Min-Young;Chae, Min-Young;Ji, Eun-Mi;Bae, Yang-Seop
    • Korean journal of applied entomology
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    • v.45 no.3 s.144
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    • pp.261-268
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    • 2006
  • Ten species of subtropical macro-moths including Squamura sp. of Metarbelidae, were discovered at Is. Daecheong in the West Sea. The other nine species are Zeuzera sp., Setora baibarana (Matsumura), Toccolosida rubriceps Walker, Hyposidra talaca (Walker), Celerena signata Warren, Creatonotos transiens (Walker), Vitessa suradeva Moore, Callambulyx rubricosa (Walker), and Dodusa nobilis Walker, and they are mostly distributed in the subtropical area from the southern part of China to Borneo or Java.

Verification Study on the Treasure #634 of Silla Face-Inlaid Glass Bead: Focusing on the Design and Cultural Symbolic Elements (보물 제634호 신라 인면 상감 유리구슬의 검증 연구: 디자인과 문화 상징요소를 중심으로)

  • Misuk Choi;Hyo Jeong Lee;Youngjoo Na
    • Science of Emotion and Sensibility
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    • v.26 no.4
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    • pp.71-92
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    • 2023
  • This study investigates the symbolism and meaning of the bead design, its relationship with the Silla culture, and the conditions of glass bead manufacturing to verify the theory of Silla's production of Silla face-inlaid glass beads with excellent artistry and technology. The research method includes investigating the design analysis, ancient documents, myths, relics, glass, and metal production techniques. Moreover, Hongshan cultural relics and other cases of inlaid glass beads were collected. There are records in the literature that the people of Makhan, Buyeo and Silla of ancient Korea people considered beads as treasures and used them for accessories. It was confirmed that all the design elements of the bead-patterned hair topknot, golden crown, birds, and flower trees were closely related to the myth of Kim Al-ji of Silla, the oviparous tales and the sacred birds and divine beasts of the north. Moreover, the pattern and arrangements were found to be similar in other Silla relics. The origin of beads and face pendants was Hongsan culture, and a stone cast for beads was discovered in Bukpyo of Gojoseon, the lower-level culture of Hajiajeom. In addition, excavating inlaid glass beads from Sik-ri tombs of Korea and a face-inlaid glass bead from Toganmori tombs in Japan confirms the theory of Silla's production. The fact that the Baekje people of ancient Korea had a glass bead manufacturing office in Japan in the fifth centuries suggests that the Silla people also had a manufacturing plant in Java, Indonesia, because this place was a crossroads of Silla's Sea Silk Road and a source of raw materials and labors with a close relationship to Silla. Therefore, the face-inlaid glass bead was indeed self-made by Silla, who possessed the tradition of bead myths and hair topknot, and the high-level skills such as gold crowns and metal inlays.

Indonesia, Malaysia Airline's aircraft accidents and the Indonesian, Korean, Chinese Aviation Law and the 1999 Montreal Convention

  • Kim, Doo-Hwan
    • The Korean Journal of Air & Space Law and Policy
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    • v.30 no.2
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    • pp.37-81
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    • 2015
  • AirAsia QZ8501 Jet departed from Juanda International Airport in, Surabaya, Indonesia at 05:35 on Dec. 28, 2014 and was scheduled to arrive at Changi International Airport in Singapore at 08:30 the same day. The aircraft, an Airbus A320-200 crashed into the Java Sea on Dec. 28, 2014 carrying 162 passengers and crew off the coast of Indonesia's second largest city Surabaya on its way to Singapore. Indonesia's AirAsia jet carrying 162 people lost contact with ground control on Dec. 28, 2014. The aircraft's debris was found about 66 miles from the plane's last detected position. The 155 passengers and seven crew members aboard Flight QZ 8501, which vanished from radar 42 minutes after having departed Indonesia's second largest city of Surabaya bound for Singapore early Dec. 28, 2014. AirAsia QZ8501 had on board 137 adult passengers, 17 children and one infant, along with two pilots and five crew members in the aircraft, a majority of them Indonesian nationals. On board Flight QZ8501 were 155 Indonesian, three South Koreans, and one person each from Singapore, Malaysia and the UK. The Malaysia Airlines Flight 370 departed from Kuala Lumpur International Airport on March 8, 2014 at 00:41 local time and was scheduled to land at Beijing's Capital International Airport at 06:30 local time. Malaysia Airlines also marketed as China Southern Airlines Flight 748 (CZ748) through a code-share agreement, was a scheduled international passenger flight that disappeared on 8 March 2014 en route from Kuala Lumpur International Airport to Beijing's Capital International Airport (a distance of 2,743 miles: 4,414 km). The aircraft, a Boeing 777-200ER, last made contact with air traffic control less than an hour after takeoff. Operated by Malaysia Airlines (MAS), the aircraft carried 12 crew members and 227 passengers from 15 nations. There were 227 passengers, including 153 Chinese and 38 Malaysians, according to records. Nearly two-thirds of the passengers on Flight 370 were from China. On April 5, 2014 what could be the wreckage of the ill-fated Malaysia Airlines was found. What appeared to be the remnants of flight MH370 have been spotted drifting in a remote section of the Indian Ocean. Compensation for loss of life is vastly different between US. passengers and non-U.S. passengers. "If the claim is brought in the US. court, it's of significantly more value than if it's brought into any other court." Some victims and survivors of the Indonesian and Malaysia airline's air crash case would like to sue the lawsuit to the United States court in order to receive a larger compensation package for damage caused by an accident that occurred in the sea of Java sea and the Indian ocean and rather than taking it to the Indonesian or Malaysian court. Though each victim and survivor of the Indonesian and Malaysia airline's air crash case will receive an unconditional 113,100 Unit of Account (SDR) as an amount of compensation for damage from Indonesia's AirAsia and Malaysia Airlines in accordance with Article 21, 1 (absolute, strict, no-fault liability system) of the 1999 Montreal Convention. But if Indonesia AirAsia airlines and Malaysia Airlines cannot prove as to the following two points without fault based on Article 21, 2 (presumed faulty system) of the 1999 Montreal Convention, AirAsia of Indonesiaand Malaysia Airlines will be burdened the unlimited liability to the each victim and survivor of the Indonesian and Malaysia airline's air crash case such as (1) such damage was not due to the negligence or other wrongful act or omission of the air carrier or its servants or agents, or (2) such damage was solely due to the negligence or other wrongful act or omission of a third party. In this researcher's view for the aforementioned reasons, and under the laws of China, Indonesia, Malaysia and Korea the Chinese, Indonesian, Malaysia and Korean, some victims and survivors of the crash of the two flights are entitled to receive possibly from more than 113,100 SDR to 5 million US$ from the two airlines or from the Aviation Insurance Company based on decision of the American court. It could also be argued that it is reasonable and necessary to revise the clause referring to bodily injury to a clause mentioning personal injury based on Article 17 of the 1999 Montreal Convention so as to be included the mental injury and condolence in the near future.

Intraspecific diversity and phylogeography of bony lip barb, Osteochilus vittatus, in Sundaland, as revealed by mitochondrial cytochrome oxidase I (mtCOI)

  • Imron Imron;Fajar Anggraeni;Wahyu Pamungkas;Huria Marnis;Yogi Himawan;Dessy Nurul Astuti;Flandrianto Sih Palimirmo;Otong Zenal Arifin;Jojo Subagja;Daniel Frikli Mokodongan;Rahmat Hidayat
    • Fisheries and Aquatic Sciences
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    • v.27 no.3
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    • pp.145-158
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    • 2024
  • Life history characteristics, habitat landscape, and historical events are believed to have shaped the patterns of genetic variation in many taxa. The bony lip barb, Osteohilus vittatus, represent a potamodromous fish that complete all life cycle in freshwater and is widely distributed in Southeast Asia. It usually lives in small rivers and other freshwater habitats, and movement between habitats for either food or reproduction has been typical. These life history characteristics may promote gene flow, leading to less structured populations. However, many freshwater habitats are fragmented, which restricts gene flow. We investigate how this interplay has shaped patterns of genetic variation and phylogeographic structure within this species in the Sundaland, a biodiversity hotspot with a complex geological history, using mitochondrial cytochrome oxidase I (mtCOI) as a genetic marker. Forty-six mtCOI sequences of 506 bp long were collected from ten localities, eight geographically isolated and two connected. The sequences were used for population genetic and phylogeographic analyses. Our results showed a low genetic diversity within populations but high between populations. There was a deep phylogeographic structure among geographically isolated populations but a lack of such structure in the connected habitats. Among geographically isolated populations, sequence divergence was revealed, ranging from 1.8% between Java and Sumatra populations to 12.2% between Malaysia and Vietnam. An indication of structuring was also observed among localities that are geographically closer but without connectivity. We conclude that despite high dispersal capacity, the joint effects of historical events, long-term geographic isolation associated with sea level oscillation during the Pleistocene, and restricted gene flow related to lack of habitat connectivity have shaped the phylogeographic structure within the O. vittatus over the Sundaland.