• Journal of the Korea Institute of Information Security & Cryptology
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• v.20 no.5
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• pp.111-124
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• 2010

AMI (Advanced Metering Infrastructure) is a core infrastructure of Smart Grid, and is promoting in various country. Wireless network is considered for cost savings and operational efficiencies in AMI. But various security problems are expected in wireless networks of AMI, so we should solve these problems. In this paper, we suggest a wireless network of AMI by using Binary CDMA and security countermeasures of AMI wireless network. Proposed security architecture is using BSIM (Binary Subscriber Identity Module) to perform user authentication and key agreement for the encryption and decryption over radio network to reduce security threats.

• Review of KIISC
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• v.11 no.6
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• pp.63-73
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• 2001

3세대 방식인 IMT-2000 (International Mobile Telecommunication-2000)시스템은 GSM이나 IS-95 CDMA 시스템과 같은 2세대 이동통신 시스템과 비교하여 고속의 멀티미디어 서비스 제공 및 글로벌 로밍을 특징으로 한다. W-CDMA 방식 IMT-2000에 대한 인증 메커니즘은 3GPP TSG SA WG3에 의해서 개발되었다. 본 논문에서는 3GPP에서의 AKA(Authentication & Key Agreement)를 분석하고 이를 통해 안전성 분석 및 취약성을 분석한다. 본 논문에서 제기하는 안전성 분석 및 취약성 분석은 앞으로의 더 좋은 서비스를 제공할 것이다.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.11c
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• pp.1933-1936
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• 2003

2 세대 GSM 통신에서는 SIM 을 이용하여 망이 사용자를 인식하는 단방향 인증 서비스만 제공한다. 하지만, 3 세대 비동기 방식의 IMT-2000 에서는 2 세대 인증 메커니즘의 취약성 보완 및 양방향 인증을 위해서 새로운 인증 프로토콜을 설계하였다. 이에 3GPP 는 인증 메커니즘의 핵심 알고리즘으로 Milenage를 사용할 것을 권고하고 사업자는 이를 사용하여 인증 서비스를 제공할 것으로 예상된다. 본 논문은 JCOS 기반의 USIM 플랫폼에서 상호인증 기능을 수행하는 자바 애플릿 구현에 관한 것이다. 결과에 관해 에뮬레이터 환경에서 테스트하여 표준문서에서 제시하는 값과 동일함을 확인하였다.

• Tuberculosis and Respiratory Diseases
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• v.60 no.5
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• pp.548-553
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• 2006

Background : Alcoholic ketoacidosis(AKA) is a metabolic disturbance that is caused by prolonged and excessive alcohol consumption. Though the prognosis is reportedly good, its outcome is unclear in some cases that are combined with multi-organ failure. There are few reports of an analysis of cases admitted to an intensive care unit(ICU) Method: Cases of AKA admitted to the ICU over the last 5 years were retrospectively analyzed. Severe AKA was characterized by multi-organ failure that required treatment in an ICU Results : All patients were males with a history of excessive alcohol consumption. Five of them (50%) mainly complained of gastrointestinal symptoms (nausea, vomiting, diarrhea), showing metabolic acidosis with an increased asmolar and anion gap. Rhabdomyolysis with acute renal failure was the most common combined organ failure. Mechanical ventilation was performed in 80%. Six patients died and 4 patients survived. In the surviving patients, the arterial blood gas analysis(ABGA) was normalized within 12 hours after admission. Conclusion : In severe AKA patients, rhabdomyolysis with acute renal failure was the most common complication. The mortality rate was high and death from shock occurred within 3 days.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.05a
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• pp.599-602
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• 2008

본 논문에서는 증명프로토콜(EAP)을 분석하는 것에 중점을 두고 있다. 무선네트워크 환경에서 안전하게 통신하기 위해 사용되는 EAP 방법을 검토하여 그 방법들의 이점과 취약점을 분석하며, 새로운 프로토콜을 제안한다. 제안된 프로토콜은 무선 네트워크인 802.11에 맞추어 설계하였다. 그리고 802.11 환경이 아닌 다른 무선 네트워크 환경인 RFID와 WiMAX 환경에서 EAP가 가져야 하는 특징을 제시하며 3G네트워크 환경에서 가져야 할 새로운 특징을 제안한다.

• Aerospace Industry
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• v.83
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• pp.34-37
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• 2004

지난 2월 산업자원부에서 발표한 ''''2004년 항공우주산업 육성계획''''에 의하면 대외 의존적인 국내 항공우주산업의 자립 기반을 구축하고 수입유발적인 항공우주산업의 고부가가치 창출과 무역수지 개선을 위하여 510억원 규모의 자금을 국내 항공우주 산업계에 지원하게 된다. 이 중에서도 항공우주 핵심 부품·소재 기술개발에 120억원 규모의 지원금을 배정함으로써 이 분야에 대한 육성이 앞장서고 있다. 또 국방부는 KMH나 E-X 사업에서 총 계약금의 30%를 국내참여분으로, 해외참여분 70%의 30%를 절충교역분으로 규정함으로써 국내업체의 참여를 보장하고 핵심 기술 및 부품의 국산화 개발을 적극적으로 추진하고 있다. 이와 같은 추세를 볼 때 항공우주분야에서 접목시킬 수 있는 기술기반을 가진 업체들의 발굴이 절실하다. 이러한 맥락에서 (주)AKA가 알루미늄·티타늄 계열의 성형기술을 항공우주 및 방위산업에 접목시키고 있는 기술적인 노력은 새롭게 평가받을 만하다.

• Journal of the Korean Society of Propulsion Engineers
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• v.12 no.4
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• pp.24-32
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• 2008

We made a new propellant formulation to improve the productivity of Base Bleed Unit(aka BBU) by reducing of the curing time. We made an experiment with new propellant formulation such as binder characteristics and manufacturing process. In addition, we already tested several basic characteristics and the final performance of the new propellant. According to the test report, it was not only satisfied with all requirements in the specification, but it also contributed to improve productivity and reduced 53% of the curing time.

• International Journal of Ocean Engineering and Technology Speciallssue:Selected Papers
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• v.3 no.1
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• pp.1-7
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• 2000

A new alternative for large deepwater field development is described. This "Oil Box" (aka "Box Spar") is a multifunction vessel capable of floating drilling, production, storage and offloading (FDPSO). It is distinguished from other Floating Production, Storage and Offloading (FPSO) vessels by its unique hull form and oil storage system. It's main advantages are flexibility derived from the floatover deck option, use of proven top tensioned riser technology, and motion characteristics which make it operable in a wide range of environmental conditions.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.9 no.10
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• pp.4143-4159
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• 2015

We-the-media (aka wedia) is a concept where the users of social networking sites, such as Facebook, turn into the broadcasters. This study used the popular application Bitstrips as the experiment tool. Facebook was used as the Wedia platform for publishing designed comics, then used the three elements of Goffman's dramaturgy model-role, scene and dialog-to analyze 265 comics created by 3 researchers and observe the audience's responses within 9 months. The results showed that people want to see a good story with positive dialogue, and prefer scene is school more than work. As all these elements are controllable, Wedia communication has the potential for more applications. We also found that including the elements of news, gambling and gift-giving tended to trigger greater response. Furthermore, We suggesting that such embedding of product information in web episodes (webisodes) with caricature could be a successful marketing strategy.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.15 no.10
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• pp.3498-3512
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• 2021

This article describes how events that make up text stories can be represented and extracted. We also address the results from our simple experiment on extracting and clustering events in terms of emotions, under the assumption that different emotional events can be associated with the classified clusters. Each emotion cluster is based on Plutchik's eight basic emotion model, and the attributes of the NLTK-VADER are used for the classification criterion. While comparisons of the results with human raters show less accuracy for certain emotion types, emotion types such as joy and sadness show relatively high accuracy. The evaluation results with NRC Word Emotion Association Lexicon (aka EmoLex) show high accuracy values (more than 90% accuracy in anger, disgust, fear, and surprise), though precision and recall values are relatively low.