• 전자통신동향분석
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• 제25권5호
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• pp.159-171
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• 2010

iPad는 Apple사가 만든 태블릿 PC 또는 이와 유사한 모바일 디바이스로, iPhone의 기능에 부가하여 iWorks, iBooks, iAd라는 킬러앱을 장착함으로써 모바일 산업 및 기존 산업들의 생산-유통-소비 구조에 큰 변화를 몰고 올 것으로 전망된다. 주요 기관별 2010년 판매 전망이 300~1,000만 대 사이로 다양한 가운데, iPad는 출시 28일 만에 100만 대의 판매를 돌파하면서 Apple사의 i-시리즈 중 가장 빠른 초기 판매속도를 보이고 있다. 그러나 국내에서는 iPad의 시장확산 속도와 영향력이 해외에서만큼 파괴적이지는 않을 것으로 예상된다. 이는 우리나라 모바일 디바이스 이용 환경/문화가 북미-유럽과 다르고, 대기업 중심의 탄탄한 모바일 단말 제조-유통 구조가 구축되어 있으며, 국내에서 iPhone이 시장점유율 변화에 미친 영향력이 미비했다는 점으로 설명할 수 있겠다. 한편, iPad 열풍에 대한 국내 IT 업체들의 대응방안으로는 대안 소프트웨어 플랫폼을 적극 개발하는 전략, Apple사의 플랫폼 주도권을 인정하고 콘텐츠 및 애플리케이션 개발에 주력하는 전략, 그리고 iPad를 모방한 Me-too 제품을 출시하는 전략 등을 고려할 수 있겠다.

• 한국항행학회논문지
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• 제15권5호
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• pp.887-892
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• 2011

최근 아이패드가 발표되어 신규 휴대기기에 대한 관심이 높아지고 있다. 이렇듯 태블릿 PC 시장이 확대됨에 따라 태블릿 PC에 대한 조사 빈도도 급증할 것으로 예상한다. 하지만 외산 포렌식 도구를 활용한 아이패드 조사는 국내에 특화된 애플리케이션의 분석을 수행할 수 없으며 단순한 뷰어 기능만을 제공하여 체계화된 분석이 어렵다. 따라서 본 논문에서는 아이패드의 기본적인 애플리케이션과 국내에 특화된 애플리케이션을 분석하여 데이터를 획득하고 이를 이용한 효과적인 디지털 포렌식 기법에 대해 제시한다.

• 대한전자공학회논문지
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• 제26권5호
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• pp.117-126
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• 1989

본 논문에서는 게이트 어레이 방식의 레이아웃 설계를 위한 새로운 배치 알고리듬을 제안한다. 제안된 배치 알고리듬은 서로 크기가 다른 마크로셀을 처리할 수 있으며, I/Q pad의 위치를 고려함으로써 칩의 내부 영역과 I/Q pad간의 배선을 효율적으로 자동화한다. 알고리듬은 초기 분할, 초기 배치 개선의 3단계로 구성된다. 초기 분할 단계에서는 각 I/Q pad의 위치를 고려하여 clustering에 의해 전체 회로를 5그룹으로 분할한다. 초기 배치 단계에서는 각 I/Q pad 및 주변 그룹과의 연결도를 고려한 clustering/min-cut 분할에 의해 각 셀의 위치를 할당한다. 또한, 배치 개선에서는 확률적 배선 밀도 함수를 도입하여 칩내의 배선 밀도를 균일화하기 위한 셀 이동 알고리듬을 제안한다.

• 디지털콘텐츠학회 논문지
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• 제12권2호
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• pp.225-232
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• 2011

는 책의 형태를 띠고 있지만 인쇄책이나 전자북(eBook)에서 보였던 '책'이라는 고정관념의 틀에서 벗어나 매체미학적 요소, 영상미학적 요소, 게임적 요소에 이르기까지 다양한 장르와 매체의 특성을 수용하고 있는 혁신적인 창조물이다. 앱(App)의 형식으로 구현된 앱북(AppBook)의 경우 기존의 인쇄책이나 전자책과는 차별화된 매체적 특성으로 사용자(독자)와의 상호작용성을 이끌어내고 있다. 본고에서는 매체의 특성과 내용의 관계를 다루는 매체미학적 시각에서 앱북 기반의 디지털소설 담화생성을 살펴본다. 매체특성이 텍스트의 내용과 관련을 맺으면서 매체에 따라 텍스트가 변형된다는 것을 염두에 둔다면, 창작과정에 있어서 이야기와 담화의 생성 방향 또한 디지털 매체와의 호흡을 수용하는 것이 바람직하다.

• Journal of Acupuncture Research
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• 제21권1호
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• pp.33-50
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• 2004

Objective: The aim of this study was to investigate anti-ischemic effect of LR1 HT8 Reduction in Acupuncture Methods: I designed to investigate whether LR1 HT8 Reduction in Acupuncture affects cerebral hemodynamics [regional cerebral blood flow(rCBF), pial arterial diameter(PAD), mean arterial blood pressure(MABP)] in normal rats and to make manifest whether LR1 HT8 Reduction in Acupuncture is mediated by cyclooxygenase or guanylate cyclase. The changes of rCBF and MABP were determinated by laser-doppler flowmetry(LDF), and the change of PAD was de terminated by video microscope and width analyzer. Results: The results were as follows; 1. LR1 Reduction in Acupuncture was increased rCBF and PAD, but decreased MABP. 2. HT8 Reduction in Acupuncture was significantly increased rCBF, but decreased MABP, and increased PAD. 3. LR1 HT8 Reduction in Acupuncture was significantly increased rCBF, PAD, but decreased MABP after withdrawing of the needle. This results suggest that LR1 HT8 Reduction in Acupuncture increased significantly rCBF by dilating PAD. 4. Pretreatment with indomethacin(1mg/kg, i,v.) was significantly inhibited LR1 HT8 Reduction in Acupuncture induced increase of rCBF and PAD, but increased LR1 HT8 Reduction in Acupuncture induced decrease of MABP after withdrawing of the needle. 5. Pretreatment with methylene blue($10{\mu}g/kg$, i,v.) was decreased LR1 HT8 Reduction in Acupuncture induced increase of rCBF and PAD, but accelerated LR1 HT8 Reduction in Acupuncture induced decrease of MABP. Conclusions: I suggest that LR1 HT8 Reduction in Acupuncture has an anti-ischemic effect through the improvement of cerebral hemodynamics, and the mechanism is mediated by cyclooxygenase.

• 대한인간공학회지
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• 제25권2호
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• pp.187-196
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• 2006

This study aims to develop luxuriousness models based on both users' subjective feelings and objective material characteristics of automobile crash pad using Kansei engineering approach. Based on the results of literature survey and FGI, 12 Kansei variables describing look-and-feel and touch feel and crash pad design variables were extracted for systematically developing both a conceptual model of luxuriousness and a questionnaire for Kansei evaluation. A total of 41 various crash pad samples and 60 participants(customers: 30, designers: 30) were employed to evaluate the crash pad samples using the questionnaire with 9-point semantic differential scale and 100-point modified magnitude estimate scale. Based on the survey results, luxuriousness models were developed by using regression and quantification I method. In addition, they were compared and contrasted with respect to the relative importance of Kansei variables. Consequently, the developed luxurious model could suggest the preferred combination of material properties of crash pad.

• 동의생리병리학회지
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• 제17권5호
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• pp.1194-1201
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• 2003

Jaeumgenby-tang(JGT) have been used in oriental medicine for many centries as a therapeutic agent of vertigo caused by deficiency of qi(氣) and blood(血). Effect of Aurantii Fructus(AF) take off the phlegm by promoting the circulation of qi, Gastrodae Rhizoma(GR) has effects treating for headarch, vertigo by calming the liver and suppressing hyperactivity of the liver-yang (陽). I investigated whether injection of JGT adding AFㆍGR extract(JTG) affects cerebral hemodynamics [regional cerebral blood f1ow(rCBF), pial arterial diameter(PAD) in cerebral ischemia rats by MCA occlusion method, and I designed to make manifest whether JTG is mediated by adrenergic β-receptor, cyclooxygenase or guanylate cyclase. The changes of rCBF was determinated by laser-doppler flowmetry(LDF), and the changes of PAD was determinated by video microscope and width analyzer. The results were as follows in cerebral ischemic rats; The changes of rCBF and PAD were increased stabilizly by treatment with JTG(10 ㎎/kg, i.v.) during the period of cerebral reperfusion, and pretreatment with propranolol and indomethacin were increased JTG induced increase of rCBF and PAD during the period of cerebral reperfusion. Pretreatment methylene blue was decreased JTG induced increase of rCBF and PAD during the period of cerebral reperfusion. In conclusion, JTG causes a diverse response of rCBF and PAD, and action of JTG is mediated by adrenergic β-receptor and cyclooxygenase. I suggest that JTG has an anti-ischemic effect through the improvement of crebral hemodynamics.

• Tribology and Lubricants
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• 제37권3호
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• pp.99-105
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• 2021

In this study, for a high-pressure turbine (HPT) of 800 MW class supercritical thermal-power plant, considering aerodynamic cross-coupling, we performed a rotordynamic logarithmic decrement (LogDec) stability analysis with various tilting pad journal bearing (TPJB) designs, which several steam turbine OEMs (original equipment manufacturers) currently apply in their supercritical and ultra-supercritical HPTs. We considered the following TPJB designs: 6-Pad load on pad (LOP)/load between pad (LBP), 5-Pad LOP/LBP, Hybrid 3-Pad LOP (lower 3-Pad tilting and upper 1-Pad fixed), and 5-Pad LBPs with the design variables of offset and preload. We used the API Level-I method for a LogDec stability analysis. Following results are summarized only in a standpoint of LogDec stability. The Hybrid 3-Pad LOP TPJBs most excellently outperform all the other TPJBs over nearly a full range of cross-coupled stiffness. In a high range of cross-coupled stiffness, both the 6-Pad LOP and 5-Pad LOP TPJBs may be recommended as a practical conservative bearing design approach for enhancing a rotordynamic stability of the HPT. As expected, in a high range of cross-coupled stiffness, the 6-Pad LBP TPJBs exhibit a better performance than the 5-Pad LBP TPJBs. However, contrary to one's expectation, notably, the 5-Pad LOP TPJBs exhibit a slightly better performance than the 6-Pad LOP TPJBs. Furthermore, we do not recommend any TPJB design efforts of either increasing a pad offset from 0.5 or a pad preload from 0 for the HPT in a standpoint of stability.

• 동의생리병리학회지
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• 제18권1호
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• pp.75-83
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• 2004

This experimental study was designed to investigate the effects of Sagunja-tang(SGJT), Ijin-tang(IJT), Yukgunja-tang(YGJT) on the change of cerebral hemodynamics [regional cerebral blood f1ow(rCBF), mean arterial blood pressure(MABP), and pial arterial diameter (PAD)] in normal rats, and further to determine the mechanism of action of YGJT. And, this Study was designed to investigate whether YGJT inhibit lactate dehydrogenase(LDH) activity in neuronal cells. The results were as follows ; 1. SGJT significantly increased rCBF but MABP was not changed comparing with normal MABP(l00 %). This results were suggested that SGJT significantly increased rCBF by dilating PAD. 2. IJT significantly decreased rCBF in a dose-dependent, but significantly increased MABP in a dose-dependent. This results were suggested that IJT significantly decreased rCBF by contracting PAD. 3. YGJT significantly increased rCBF and PAD in a dose-dependent, and YGJT increased MABP compared with normal MABP(100 %). This results were suggested that YGJT significantly increased rCBF by dilating PAD. 4. The YGJT-induced increase in rCBF was significantly accelerated by pretreatment with indomethacin (IDN, 1 mg/kg, i.p.), an inhibitor of cyclooxygenase but was significantly inhibited by methylene blue (MTB, 10 ㎍/㎏ i.p.), an inhibitor of guanylate cyclase. 5. The YGJT-induced increase in PAD and MABP were accelerated by pretreatment with IDN but was significantly inhibited by MTB. This results suggested that the mechanism of YGJT is mediated by guanylate cyclase. 6. YGJT inhibited significantly LDH activity in neuronal cells. This results were suggested that YGJT prevented the neuronal death. I thought that YGJT should have improvement of cerebral hemodynamics and inhibitive effect on the brain damage.

• 동의생리병리학회지
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• 제18권4호
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• pp.1083-1088
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• 2004

This Study was designed to investigate the mechanism of Prescription for Treatment Abundant Expectoration due to Deficiency of Qi(Yukgunja-Tang, YGT) on cerebral hemodynamics [regional cerebral blood f1ow(rCBF) and pial arterial diameter(PAD)] in cerebral ischemia rats. The results were as follows: Both rCBF and PAD were significantly and stably decreased by YGT (10㎎/㎏, i.p.) during the period of cerebral reperfusion, which contrasted with the findings of rapid and marked increase in Control group. Pretreatment with indomethacin(1㎎/㎏, i.p.), an inhibitor of cyclooxygenase and methylene blue(10㎍/㎏, i.p.), an inhibitor of guanylate cyclase significantly but unstably increased the YGT-induced increases in rCBF during the period of cerebral reperfusion. Pretreatment with indomethacin significantly and stably decreased the YGT-induced increases in PAD during the period of cerebral reperfusion, but pretreatment with methylene blue increased unstably the YGT-induced increases in PAD during the period of cerebral reperfusion. In conclusion, the present authors thought that mechanism of YGT on cerebral hemodynamics was connected with guanylate cyclase in cerebral ischemia rats.