• Title/Summary/Keyword: AIP

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A Study on Balanced Airport Slot Allocation Model Applying AIP Model -Focused on Incheon International Airport- (AIP 모델을 응용한 균형적 공항 슬롯 배정 모델에 관한 연구 -인천국제공항 사례 연구-)

  • Park, Hak-Soon;Kim, Kee-Woong
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.26 no.1
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    • pp.25-36
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    • 2018
  • This paper presents a new airport slot allocation model that uses AIP model to balance the use of airport slots within existing capacity based on the limitation of capacity expansion of airport slots. This new model is called a 'balanced airport slot allocation model', which integrates the airport facility usage system, which is applied independently without linkage, with the airport slot allocation system, introducing the market logical characteristic of 'administered incentive pricing. In this paper, we propose a new proposal to dramatically change the airport slot allocation system in the current situation where the expansion of facilities is limited in the urgent problem of the airport slot shortage, and it is necessary to balance the airport slot allocation. Airline paying for the use of an airport slot can determine the slot of the desired time slot based on the costs incurred by differentiating in the new airport slot allocation model. This is a system that allows the airlines that are willing to pay a lot of money in the market to use preferred airport slots.

Acute Intermittent Porphyria Presented with Recurrent Abdominal Pain and Hypertension (반복되는 복통과 고혈압을 동반한 급성 간헐성 포르피린증 1예)

  • Park, Mi-Ran;Seo, Jeong-Kee;Ko, Jae-Sung;Chang, Ju-Young;Yang, Hye-Ran
    • Pediatric Gastroenterology, Hepatology & Nutrition
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    • v.14 no.1
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    • pp.81-85
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    • 2011
  • Acute intermittent porphyria (AIP) is a rare disorder characterized biochemically by the increased excretion of porphyrins and porphyrin precursors, including delta-aminolevulinic acid (ALA) and porphobilinogen (PBG). AIP has variable clinical manifestations, such as acute abdominal pain, vomiting, nausea, constipation, peripheral neuropathy, seizures, tachycardia, and hypertension. A 16-year-old girl presented with recurrent abdominal pain, vomiting, hypertension, seizures, hypercholesterolemia, and red urine. AIP was confirmed by clinical features and increased 24-hour urine ALA and PBG. AIP should be considered in the differential diagnosis of patients who have abdominal pain, hypertension, and seizures when the results of all other tests are normal.

The Correlation Parameters and the Optimization of a PN Sequence Phase for Variable Spreading Gain (VSG) Multi-Rate DS/CDMA System (멀티레이트 서비스를 지원하는 VSG-DS/C음 시스템에서의 PN 시퀀스 상관 파라미터 특성과 최적화)

  • 이연우;김응배;차균현
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.25 no.1A
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    • pp.10-17
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    • 2000
  • In this paper, we evaluate the correlation properties and the optimization of PN sequence phase for multi-media DS/CDMA system with variable spreading gain (VSG) scheme. In multi-media multi-rate DS/CDMA systems, the optimization of PN sequence phase is not a tractable problem, since the sequences should be optimized against both sequences of the same length and other sequences with different length. Hence, we verify the correlation properties of PN sequence phase in multi-rate system environment and furthermore, we propose the new phase criterion, MIN-AIP (minimum-average interference parameter), to minimize the bit error rate (BER). As the results of performance evaluations, it is shown that the performance of MIN-AIP criteria gives the best results.

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Authentication Interworking Protocol based on Media Independent Handover in Heterogeneous Networks (MIH 기반의 이기종 네트워크 환경에서 대리 서명을 이용한 인증 연동 프로토콜)

  • Roh, Hyo-Sun;Jung, Sou-Hwan
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.47 no.2
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    • pp.86-94
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    • 2010
  • This paper proposed an authentication interworking protocol (AIP) based on IEEE 802.21 MIH in the heterogeneous networks. The proposed AIP using the RSA signature reduces handover delay time and communication message overhead when the mobile node moves between the heterogeneous networks. It defines new AIP TLV in MIH frame format and uses the MIH Information Server (MIHIS) for proxy signature issue instead of the authentication server for the heterogeneous networks. For low handover delay, the proposed AIP performs pre-authentication processes with MIH protocol before layer 2 handover. Also, this paper analyzed the performance of the handover and compared with the non-secure MIH protocol.

Surface Characterization According to the Bias Voltage of the TiAgN Coating Film Layer Formed by the AIP Process (AIP법으로 형성된 TiAgN 코팅필름의 바이어스전압에 따른 표면 특성 분석)

  • Baek, Min-Sook;Yoon, Dong-Joo;Kang, Byeong-Mo;Jeong, Woon-Jo;Kim, Byung-Il
    • Korean Journal of Materials Research
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    • v.25 no.5
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    • pp.253-257
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    • 2015
  • The implanting of metal products is performed with numerous surface treatments because of toxicity and adhesion. Recently, the surface modification of metal products has been actively studied by coating the surface of the TiC or TiN film. We prepared a Ti(10%)Ag Target which may be used in dental oral material by, using the AIP(arc ion plating) system TiAgN coating layer that was deposited on Ti g.23. The purpose of this study was to establish the optimal bias voltage conditions of the coated TiAgN layer formed by the AIP process. The TiAgN coatings were prepared with different bias voltage parameters (0V to -500V) to investigate the effect of bias voltage on their mechanical and chemical properties. The SEM(scanning electron microscope), EDS(energy dispersive X-ray spectrometer), XRD(X-ray diffraction), micro-hardness, and potentiodynamic polarization were measured and the surface characteristics of the TiAgN coating layers were evaluated. The TiAgN coating layer had different mechanical characteristics based on the bias voltage, which also showed differences in thickness and composition.

Autoimmune Pancreatitis Featuring a Pseudocyst Requiring Drainage despite Steroid Therapy (스테로이드 치료에도 불구하고 낭종 배액술이 필요하였던 가성낭종을 동반한 자가면역 췌장염)

  • Park, Jae Cheol;Im, Hyeon-Su;Kang, Yewon;Son, Hyo-Ju;Jung, Kyung Hwa;Han, Jisoo;Kim, Myung-Hwan
    • The Korean Journal of Medicine
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    • v.93 no.6
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    • pp.560-564
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    • 2018
  • Autoimmune pancreatitis (AIP) is rarely associated with pancreatic pseudocysts. AIP-associated pseudocysts requiring drainage despite steroid therapy are rather rare. We report a case of AIP with an infected pseudocyst requiring drainage despite steroid therapy. A 68-year-old male was diagnosed with AIP via pancreatic imaging, a high serum immunoglobulin G4 level, and steroid responsiveness. The AIP was accompanied by a pancreatic pseudocyst. Steroid therapy was prescribed, but the pancreatic pseudocyst became aggravated during steroid tapering. Endoscopic ultrasonography-guided cyst drainage was required; the pseudocyst then became completely resolved.

Effect of the WC particle size and Co content on the adhesion property between AIP-TiN coating and WC-Co substrate (AIP-TiN/WC-Co계에서 WC입자크기와 Co함량이 밀착력에 미치는 영향)

  • 한대석;류정민;권식철;김광호
    • Journal of the Korean institute of surface engineering
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    • v.35 no.3
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    • pp.165-171
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    • 2002
  • TiN coating were deposited onto different WC-Co substrates using arc ion plating (AIP) technique. The structure and morphology for the deposited coating were characterized by x-ray diffraction (XRD) and scanning electron microscopy (SEM). The adhesion behavior of the deposited TiN coating was investigated with a conventional scratch test. Effects of WC particle size and Co content on the adhesion strength between the deposited TiN coating and substrate were studied. During the scratch test, the value of critical load was dependent of WC particle size and Co content on substrate. As the WC particle size and Co content on substrate decreased, the critical load increased. The highest critical load, approximately 110N, was obtained at WC particle size of 1$\mu\textrm{m}$ and Co content of 10wt.%.

Antitumor and Immunomodulating Activities of the Polysaccharide Fractions from Artemisia selengensis and Artemisia iwayomogi

  • Koo, Kyoung-Ah;Kwak, Jong-Hwan;Lee, Kang-Ro;Zee, Ok-Pyo;Woo, Eun-Rhan;Park, Ho-Kun;Youn, Hyun-Joo
    • Archives of Pharmacal Research
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    • v.17 no.5
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    • pp.371-374
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    • 1994
  • Effects of the polysaccharide fractions purified from Artemisia selengensis and Artemisia iwayomogi on the immune system was studied. The polysaccharide fractions, respectively called ASP1 and AIP1, may interact with macrophages and lymphocytes in spleen, increasing the population of those cell types in vivo and in vitro. Both ASP1 and AIP1 fractions also syuppress transplanted tumor cell growth and augment antibody production. This study suggests that ASP1 and AIP1 fractios may have immunomodulating and antitumor activities.

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A Credit Card based Secure Micro-Payment Protocol Design (신용카드기반의 안전한 소액 지불 프로토콜 설계)

  • 김석매;이현주;이충세
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2003.10a
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    • pp.215-218
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    • 2003
  • In this paper, we propose a protocol both allow a End-to-End security between user and service provider and independent in mobile Internet platform in AIP. In particular, our proposed protocol generates a session key using Weil pairing by ID-based public key system. We analysis a security and efficient of protocol when on-line certification authority participates in authentication process.

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