• 제목/요약/키워드: U.S. Navy

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중국군의 해양작전능력과 한국군의 과제 (PRC Maritime Operational Capability and the Task for the ROK Military)

  • 김민석
    • Strategy21
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    • 통권33호
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    • pp.65-112
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    • 2014
  • Recent trends show that the PRC has stepped aside its "army-centered approach" and placed greater emphasis on its Navy and Air Force for a wider range of operations, thereby reducing its ground force and harnessing its economic power and military technology into naval development. A quantitative growth of the PLA Navy itself is no surprise as this is not a recent phenomenon. Now is the time to pay closer attention to the level of PRC naval force's performance and the extent of its warfighting capacity in the maritime domain. It is also worth asking what China can do with its widening naval power foundation. In short, it is time to delve into several possible scenarios I which the PRC poses a real threat. With this in mind, in Section Two the paper seeks to observe the construction progress of PRC's naval power and its future prospects up to the year 2020, and categorize time frame according to its major force improvement trends. By analyzing qualitative improvements made over time, such as the scale of investment and the number of ships compared to increase in displacement (tonnage), this paper attempts to identify salient features in the construction of naval power. Chapter Three sets out performance evaluation on each type of PRC naval ships as well as capabilities of the Navy, Air Force, the Second Artillery (i.e., strategic missile forces) and satellites that could support maritime warfare. Finall, the concluding chapter estimates the PRC's maritime warfighting capability as anticipated in respective conflict scenarios, and considers its impact on the Korean Peninsula and proposes the directions ROK should steer in response. First of all, since the 1980s the PRC navy has undergone transitions as the focus of its military strategic outlook shifted from ground warfare to maritime warfare, and within 30 years of its effort to construct naval power while greatly reducing the size of its ground forces, the PRC has succeeded in building its naval power next to the U.S.'s in the world in terms of number, with acquisition of an aircraft carrier, Chinese-version of the Aegis, submarines and so on. The PRC also enjoys great potentials to qualitatively develop its forces such as indigenous aircraft carriers, next-generation strategic submarines, next-generation destroyers and so forth, which is possible because the PRC has accumulated its independent production capabilities in the process of its 30-year-long efforts. Secondly, one could argue that ROK still has its chances of coping with the PRC in naval power since, despite its continuous efforts, many estimate that the PRC naval force is roughly ten or more years behind that of superpowers such as the U.S., on areas including radar detection capability, EW capability, C4I and data-link systems, doctrines on force employment as well as tactics, and such gap cannot be easily overcome. The most probable scenarios involving the PRC in sea areas surrounding the Korean Peninsula are: first, upon the outbreak of war in the peninsula, the PRC may pursue military intervention through sea, thereby undermining efforts of the ROK-U.S. combined operations; second, ROK-PRC or PRC-Japan conflicts over maritime jurisdiction or ownership over the Senkaku/Diaoyu islands could inflict damage to ROK territorial sovereignty or economic gains. The PRC would likely attempt to resolve the conflict employing blitzkrieg tactics before U.S. forces arrive on the scene, while at the same time delaying and denying access of the incoming U.S. forces. If this proves unattainable, the PRC could take a course of action adopting "long-term attrition warfare," thus weakening its enemy's sustainability. All in all, thiss paper makes three proposals on how the ROK should respond. First, modern warfare as well as the emergent future warfare demonstrates that the center stage of battle is no longer the domestic territory, but rather further away into the sea and space. In this respect, the ROKN should take advantage of the distinct feature of battle space on the peninsula, which is surrounded by the seas, and obtain capabilities to intercept more than 50 percent of the enemy's ballistic missiles, including those of North Korea. In tandem with this capacity, employment of a large scale of UAV/F Carrier for Kill Chain operations should enhance effectiveness. This is because conditions are more favorable to defend from sea, on matters concerning accuracy rates against enemy targets, minimized threat of friendly damage, and cost effectiveness. Second, to maintain readiness for a North Korean crisis where timely deployment of US forces is not possible, the ROKN ought to obtain capabilities to hold the enemy attack at bay while deterring PRC naval intervention. It is also argued that ROKN should strengthen its power so as to protect national interests in the seas surrounding the peninsula without support from the USN, should ROK-PRC or ROK-Japan conflict arise concerning maritime jurisprudence. Third, the ROK should fortify infrastructures for independent construction of naval power and expand its R&D efforts, and for this purpose, the ROK should make the most of the advantages stemming from the ROK-U.S. alliance inducing active support from the United States. The rationale behind this argument is that while it is strategically effective to rely on alliance or jump on the bandwagon, the ultimate goal is always to acquire an independent response capability as much as possible.

빅데이터 기반 함정 시운전 종목명 분석 (Analysis of Sea Trial's Title for Naval Ships Based on Big Data)

  • 이형신;서형필;백용관;이상일
    • 한국산학기술학회논문지
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    • 제21권11호
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    • pp.420-426
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    • 2020
  • 본 연구에서는 효율적인 함정 시운전을 위하여 빅데이터 기법인 워드 클라우드를 활용하여 한미 해군의 시운전 목적과 주안점을 다각적으로 파악하여 다음과 같은 결과를 도출하였다. 첫째, 한미 해군 시운전 종목을 키워드 클렌징을 통해 추출된 단어를 비교한 결과 한국 해군은 시운전을 단일 장비에 대한 시험의 개념으로 수행하며, 미 해군은 시스템에 초점을 둔 통합 시운전을 진행한다는 것을 알 수 있었다. 둘째, 한미 해군 시운전 연관도 분석 결과 약 66.6%가 유사한 항목으로 분석되었으며, 그중 2종목 이상 중복된 종목이 112종목이었다. 한국 해군 시운전 종목 252종목 대비 44%가 중복된 종목으로 미 해군 시운전 종목으로 통합시 89종목(전체 35%)이 축소 가능하다고 분석되었다. 함정은 여러 장비가 동시 다발적으로 작동하는 복합 시스템이다. 현재 한국 해군 시운전과 같이 개별 장비의 기능, 성능 확인에 중점을 두고 수행하는 것은 시운전 대상이 지나치게 많아져 시운전 기간이 증가하게 된다. 또한, 그로 인한 일정 및 평가비용 증가로 필요한 예산이 필연적으로 증가한다. 향후 미 해군의 시운전과 같이 통합 시스템적인 평가를 통한 효율적이면서 정확한 시운전을 위하여 추가적인 연구가 필요하다고 판단된다.

INTERPRETING A SINGLE ANTISTREPTOLYSIN O TEST: A COMPARISON OF THE 'UPPER LIMIT OF NORMAL' AND LIKELIHOOD RATIO METHODS

  • Gray Gregory C.;Struewing Jeffery P.;Hyams Kenneth C.;Escamilla Joel;Tupponce Alan K.;Kaplan Edward L.
    • 대한예방의학회:학술대회논문집
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    • 대한예방의학회 1994년도 교수 연수회(역학)
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    • pp.164-168
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    • 1994
  • Single serologic tests may occasionally influence clinicians in making diagnoses. The antistreptolysin O (ASO) test is a frequently used tool for detecting recent Streptococcus pyogenes infection and is helpful in the diagnosis of diseases like rheumatic fever. Using data from a 1989 prospective study of 600 healthy male military recruits, in which 43% experienced S. pyogenes upper respiratory tract infection (2-dilution rise in ASO), this report compared two methods of interpreting a single ASO titer. Using the 'upper limit of normal' (80 percentile) method, recruits with an ASO titer of greater than 400 showed evidence of recent S. pyogenes infection. This method had a sensitivity and specificity of only 65.9 and 81.9% respectively. In contrast to the 'yes-no'. dichotomy of the 'upper limit of normal' method. the likelihood ratio method statistics were ASO value specific, more consistent with clinical judgment, and better emphasized the caution clinicians must use in interpreting a single ASO test.

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미 해군의 COTS 적용 사례 분석 (Analysis of Application using COTS(Commercial Off-The-Shelf) in the U.S. Navy)

  • 박찬웅;박찬일;박태용
    • 한국정보통신학회:학술대회논문집
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    • 한국정보통신학회 2015년도 추계학술대회
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    • pp.567-569
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    • 2015
  • 급속히 변화하는 위협에 신속히 대응하고 개발 및 운영유지 예산을 절감하기 위해 미 해군은 함정에 설치되는 전투체계에 MIL-SPEC 장비 대신 상용 정보통신장비를 대폭 적용하고 있다. 이지스 전투체계의 경우 베이스라인 7(Baseline 7) 부터는 COTS 기반 체계로 대체되었고, 근래에 건조된 연안전투함(LCS), 현재 건조 중인 줌왈트급 구축함 등에 탑재되는 전투체계도 완벽하게 COTS 기반으로 개발되고 있다. 본 논문에서는 미 해군 함정 전투체계에 COTS가 적용된 사례와 함형별 적용 방법의 차이에 대해 조사하여 분석하였다.

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이지스함의 탄도미사일 방어를 위한 운용개념 도출 (Derivation of Operational Concept for the BMD of the Aegis Ship)

  • 이경행;백병선
    • 항공우주시스템공학회지
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    • 제10권3호
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    • pp.44-51
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    • 2016
  • This paper describes the operational concept of the Aegis ship's missile defense. Recently, North Korea conducted a fourth nuclear-weapon test that involved the launch of a long-range missile and the underwater launch of an SLBM. The ground-based BMD (Ballistic Missile Defense) system is very limited for the SLBM of a miniaturized nuclear warhead; therefore, it is necessary to build a reliable sea-based missile-defense system. The ROK Navy has, however, only utilized the Aegis ship that is designed with a search-and-tracking sensor but is without a ballistic-missile interception capability. Given this information, this work focuses on the operational concept of the Aegis BMD by comparing the BMD capabilities of the ROK with those of the U.S.

인도·태평양 전략에 대한 주변국 입장, 한국 해군에 대한 함의 (The Stances of Neighboring States to the Indo-Pacific Strategy and Its Implications for the South Korean Navy)

  • 한종환
    • Strategy21
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    • 통권46호
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    • pp.5-28
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    • 2020
  • 2017년 트럼프 대통령의"자유롭고 열린 인도·태평양" 언급 후 이를 구체화하기 위해 2019년에 미 국방부는"인도·태평양 전략", 미 국무부는"자유롭고 열린 인도·태평양 : 공동 비전 추구"를 발표했다. 미국 외교/안보의 핵심인 국방부와 국무부에서 짧은 기간(약 6개월) 내 동일한 전략 (인도·태평양 전략) 을 구체화하기 위한 계획을 발표한 것은 이례적이다. 미 국방부와 국무부 보고서에서 미국은 자유롭고 열린 인도·태평양 구현을 위해 미국 자체의 노력 뿐만 아니라 동맹 및 파트너국의 협력과 책임분담, 동참을 강조하고 있다. 이에 따라 인도·태평양 주변 국가들은 자국의 이익에 따라 적극 참여 또는 유보적 입장을 취하고 있다. 이번 연구에서는 미국의 인도·태평양 전략 동참 요구에 대한 한국의 입장을 결정함에 있어 참고사항이 될 수 있는 주변국의 입장과 인도·태평양 전략 참여시 장·단점은 무엇인지 살펴보고자 한다. 또한"인도·태평양"이라는 단어에서도 알 수 있듯이 인도·태평양 전략을 뒷받침하는 주요 수단은 해군력이 될 것이므로, 인도·태평양 전략에서 한국해군의 역할을 무엇인지 살펴보고자 한다.

원양 작전 능력 확보를 위한 한국 해군의 장기(長期) 발전 방안 - 항공모함 및 원자력 잠수함 도입제안을 중심으로 - (Republic of Korea Navy's Long-Term Development Plan to Acquire Operational Capabilities at Distant Ocean - Focused on Introduction of Aircraft Carrier and Nuclear-powered Submarine -)

  • 김재엽
    • Strategy21
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    • 통권34호
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    • pp.149-177
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    • 2014
  • Today distant oceans around the world are regarded as a major 'global commons' for international trade and transportation. Korea is not an exception, because Korea hugely depends on sea lines of communication (SLOC) for supplying vital commodities such as food and energy resource. As a result, assuring a free and safe use of distant ocean beyond territory is also an important agenda for Korea's maritime security. However there are a number of challenges for Korea to enjoy a free and safe use of distant ocean; dangers of regional maritime conflict in East Asia, naval arms race of China and Japan, and concerns on possible decline of U.S naval presence and power projection capabilities. These factors provide a reasonable basis for Republic of Korea Navy (ROKN) to pursue capabilities for major naval operations at distant ocean in a long-term perspective toward the year 2030. The introduction of aircraft carrier and nuclear-powered submarine is a key requirement for achieving this goal. ROKN needs to acquire a 'multi-role strategic landing platform' type of light aircraft carrier, which takes a role to escort naval task force by providing air superiority at distant ocean. Additionally nuclear-powered submarine will offer ROKN a formidable power to carry out offensive missions effectively at distant ocean.

우연한 패권거부 - 미국의 세계리더십 거부와 중국의 틈새공략 - (The Accidental Denial of a Hegemonic Power's Role - The Reluctance of the U.S's Role as a World Leader and China's Target of a Niche Market -)

  • 반길주
    • Strategy21
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    • 통권42호
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    • pp.224-257
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    • 2017
  • As the Trump administration withdraws the Paris Climate Agreement and shows its antipathy toward free trade, the U.S.'s soft power is most likely to weaken and its behaviors could be perceived as acts to surrender the U.S. hegemonic leadership in the world stage. Hegemonic stability theory notes that the existence of a hegemonic power contributes to international stability in the sense that it provides international public goods. A lack of the U.S's leadership in international politics, however, could be recognized as its denial of a hegemonic status. Is it intentional or accidental? The U.S's denial of hegemonic roles is the byproduct of the Trump administration's "American First" policy, not the showcase of its intention to transit hegemony to others. What is noteworthy is that China targets a niche market of hegemony as the U.S. denies its roles as the international leader. Put it another way, China attempts to ride hegemony for free when the U.S. denies its hegemonic roles accidentally. Faced with a niche market of hegemony, China has begun to accelerate its national strategy to make "Chinese Dream" come true. To that end, China promised again to keep the Paris Climate Agreement and attempts to play more active its roles in Shanghai Cooperation Organization(SCO), Asia Infra Investment Bank(AIIB), and "One Belt, One Road". Despite all these efforts, the U.S. is most likely to withdraw its denial of hegemony any time soon. The U.S's resumption of Freedom of Navigation Operations(FONOPs) could be a precursor of the return to a hegemonic power's willingness. In this vein, it is noteworthy that the South China Sea serves as a quasi-war zone for hegemonic conflict.

공격과 방어의 관점에서 본 해양국가와 대륙국가의 해양전략 - 냉전 기 미·소간 해양전략 및 탈냉전 기 미·중간 해양전략 비교 - (The Maritime Strategy of Continental Powered Country and Maritime Powered Country based on Attack and Defense theory)

  • 정광호
    • Strategy21
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    • 통권32호
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    • pp.160-191
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    • 2013
  • This article is focused how the maritime strategy between continental powered country(the Soviet, the China) and maritime powered country(the U.S.) interact with attack and defense theory. We will know, what is the maritime strategy that the U.S. of military superiority has pursued with the point of view of attack, on the other hand, relatively what is the maritime strategy that the Soviet-Sino of military inferiority has pursued with the point of view of defense. In cold war, the Soviet has counteracted to 'blue belt defense' in active defense as to the U.S. 'sea strike' and in post cold war, the China counteract to 'A2/AD' as to the U.S. 'Air-Sea Battle'. The difference between the Soviet-Sino maritime strategy is that the China has emerged the second an economic power and their leadership has a strong's will to strengthen their navy's power. although the U.S. declare the pivot to Asia, the influence on Asia of the U.S. tend to decrease because of sequest. therefore, the China will seek to the more active defense beyond the first island chain. Meanwhile, the U.S. has reinforced of 'hub and spoke strategy' to solidify the U.S. formal allies to band together regional powers and to overcome the A2/AD challenge, the U.S. has been developed that the Air-Sea Battle concept meshes with Washington's 'rebalancing' policy toward the Asia-Pacific as its vital missions to safeguard core island or semi-island allies-namely, Korea and Japan-and crucial sea lanes of communication in the region are conducted mostly from or over the sea.

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물이 인체 건강에 미치는 영향 (Human Health Effects due to Consumption of Low TDS Water)

  • Rozelle, Lee T.
    • 멤브레인
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    • 제6권4호
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    • pp.189-195
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    • 1996
  • It is concluded from this study that human consumption of very low TDS water does not leach minerals from the body that cause ill health effects because; -The human body's own control mechanism of homeostasis and internal body secretions keep tight controls on body fluid composition regardless of drinking water TDS for a normal person under normal csonditions. -The unofficial WHO document's proposed guideline of a 100m/l lower limit for drinking water due to mineral leaching and subsequent ill health was not found to be scientifically or physiologically credible. Leaching of minerals from the body is not officially recognized by WHO. -The experience of the U.S. Navy, Army, NASA and dommunity demonstrations do not support ill health symptoms caused by consumption of low TDS drinking water. -Millions of people regularly consume maturally occurring low TDS water without symptoms of ill health.

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