• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2014년도 추계학술발표대회
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• pp.376-379
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• 2014

본 논문에서는 사람의 이동정보인 위치데이터를 바탕으로 위치분석(Location Analysis)을 통해 나타난 개개인의 이동성 모델을 바탕으로 각 개인의 이동성 모델에서 나타난 군집들의 관계를 분석해 개인이 속한 집단의 이동성 모델을 만든다. 집단 이동성 모델은 개인의 모델에서 나타난 군집을 이용하는데, 각 군집을 만드는데 필요한 위치 정보들과 군집의 중심, 군집간의 거리의 값을 계산하여 새로운 통합 군집을 만든다. 새로 만드는 군집은 각 특징에 따라 Micro Cluster, Macro Cluster의 2가지로 분류하였다. 실제 수년간 수집한 2명의 통합 개인 이동성 모델을 바탕으로 집단 이동성 모델을 생성한다. 집단 이동성 모델 생성에는 R Language를 사용하였고 결과 모델을 지도상에 표시할 수 있다.

• 전자공학회논문지S
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• 제34S권4호
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• pp.1-11
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• 1997

In this paper, modeling of the communication channel occupancy characteristics at the base station in the wide area radio trunking syste has been performed. Using the results, mathematical analysis for the switching capacity at the network switch has also been done. Specificatlly, we propose a G/M/m queueing model for the single service area modeling, and analyze changes in call blockingprobabilities accoridng to changes in the burstness characteristics of group paging calls. As a result, we have observe dthat the channel occupancy variations become larger as the burstness characteristics become more apparent, to make the call blocking probability higher. Next, based on the single service area analysis, we have anayzed mathematically the average switching capacity required to serve mobile subscribers for a wide area radio trunking sytem, where multiple switching port assignments are required when the people in the same group are distributed over several base stations. Accordingly, we have observed that the average and the variance of switching channel occupancy are closely related to the mobility characteristics of subscribers, and that we need a netowrk switch having bigger capacity as subscribers show wider distribution. Especially, with the call dropping probability within 0.2%, a switch having about 5 to 6 times bigger can be required, compared with the one when the mobility of subscribers is mostly restricte dto a single service area.

• IMMUNE NETWORK
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• 제8권2호
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• pp.39-45
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• 2008

Background: Down regulation of major histocompatibility complex class II transactivator (CIITA) has been identified as a major factor of immunosuppression in sepsis and the level of CIITA expression inversely correlates with the degree of severity. However, it has not been fully elucidated whether the lower expression of CIITA is a cause of disease process or a just associated sign. Here we determined whether the CIITA deficiency decreased survival rate using murine sepsis model. Methods: Major histocompatibility complex class II (MHC-II) deficient, CIITA deficient and wild type B6 mice were subjected to cecal ligation puncture (CLP) surgery. CIITA and recombination activation gene (RAG)-1 double deficient mice were generated to test the role of lymphocytes in CIITA-associated sepsis progression. Results: Sepsis mortality was enhanced in CIITA deficient mice, not by impaired bacterial clearance resulted from CD4 T cell depletion, but hyper-inflammatory response such as excessive release of a pro-inflammatory cytokine, high-mobility group box 1 (HMGB1). Conclusion: Our results demonstrate that CIITA deficiency affects the course of sepsis via the unexpected function of CIITA, regulation of cytokine release.

• Journal of Acupuncture Research
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• 제34권3호
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• pp.39-48
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• 2017

Objectives : The objective of this study was to evaluate the effect of Dokhwaljihwang-tang (DJT) intravenous pharmacopuncture on cisplatin-induced emesis and gastric mobility disorder in Wistar rats. Methods : Thirty rats were randomly divided into six groups and cisplatin was administered to all groups except the normal group. The cisplatin group (n=5) received a cisplatin injection only. The saline group (n=5) was injected with cisplatin followed by 0.4 mL of saline. Groups DJT-1, DJT-2, and DJT-3 were injected with cisplatin, followed by 0.315 g/kg, 0.104 g/kg, and 0.034 g/kg of DJT, respectively. Body weight, food intake, and kaolin intake of rats were measured 12 h, 24 h, and 36 h after cisplatin injection. Residual food in the stomach was measured 48 h after cisplatin injection. Results : There was no significant difference in weight. The food intake was not significantly different 12 h after cisplatin administration. All groups except the normal group showed significantly decreased food intake after 24 h. After 36 h, food intake was not significantly different between groups DJT-1, DJT-2, and DJT-3 and the normal group. The kaolin intake of groups DJT-1 and DJT-2 was significantly decreased at 12 h and 24 h after cisplatin injection. Kaolin intake and residual food in the stomach were significantly decreased in groups DJT-1, DJT-2, and DJT-3. Conclusion : In a Wistar rat model, DJT intravenous pharmacopuncture is suggested to be effective for cisplatin-induced emesis and gastric motility disorder. In the future, it is necessary to study the mechanism and chemical composition of each individual constitutive drug.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2004년도 봄 학술발표논문집 Vol.31 No.1 (A)
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• pp.847-849
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• 2004

애드혹 네트워크에서 그룹 이동성을 고려할 경우, 주요한 이슈 중 하나가 그룹의 파티션 문제이다. 파티션 시간의 예측을 위해서, 기존의 모델들은 파티션이 발생하는 두 그룹의 대칭적 이동을 가정한다. 그러나, 실제 상황에서 파티션은 다양한 방향으로 일어나므로 대칭적 방향만을 고려한다면, 정확한 파티션 시간을 예측할 수 없다. 본 논문은 대칭적 이동뿐만 아니라, 모든 방향을 고려한 네트워크 파티션 분석 모델을 제시하고 수학적인 분석을 통해 이를 증명한다. 따라서, 정확한 파티션 시간의 예측이 가능하다.

• The Korean Journal of Physiology and Pharmacology
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• 제4권1호
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• pp.41-46
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• 2000

Using fluorescence polarization of 12-(9-anthroyloxy)stearic acid (12-AS) and 2-(9-anthroyloxy)stearic acid (2-AS), we evaluated the differential effects of local anesthetics on differential rotational rate between the surface (in carbon number 2 and its surroundings including the head group) and the hydrocarbon interior (in carbon number 12 and its surroundings) of the outer monolayer of the total lipid fraction liposome extracted from synaptosomal plasma membrane vesicles. The anisotropy (r) values for the hydrocarbon interior and the surface region of the liposome outer monolayer were $0.078{\pm}0.001$ and $0.114{\pm}0.001,$ respectively. This means that the rate of rotational mobility in the hydrocarbon interior is faster than that of the surface region. In a dose-dependent manner, the local anesthetics decreased the anisotropy of 12-AS in the hydrocarbon interior of the liposome outer monolayer but increased the anisotropy of 2-AS in the surface region of the monolayer. These results indicate that local anesthetics have significant disordering effects on the hydrocarbon interior but have significant ordering effects on the surface region of the liposome outer monolayer.

• Journal of Korean Dental Science
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• 제15권1호
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• pp.61-67
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• 2022

Purpose: This study aimed to evaluate the accuracy of bite registration using intraoral scanner based on data trimming strategy for fremitus teeth. Materials and Methods: A reference model was designed by Medit Model Builder software (MEDIT Corp., Seoul). Tooth number 24 and 25 were separated as dies and tooth number 26 was prepared for full-coverage crown. Those were printed using a 3D printer (NextDent 5100). The scanning procedure was performed by a single trained operator with one intraoral scanner (i700; MEDIT Corp.). The scanning groups were divided as follows: group 1 (G1), no fremitus; group 2 (G2), 0.5 mm buccal fremitus in the maxillary left first and second premolar; and group 3 (G3), 1.5 mm buccal fremitus in the maxillary left first and second premolar. Each group was scanned 10 times and were analyzed using the reference model data. Surface-based occlusal clearance was analyzed at the prepared tooth to evaluate accuracy. Result: Mean values of control group (G1) were 1.587±0.021 mm. G2 showed similar values to those from the control group (1.580±0.024 mm before trimming strategy and 1.588±0.052 mm after trimming strategy). G3 showed significantly greater values (1.627±0.025 mm before trimming strategy and 1.590±0.024 mm after trimming strategy) and the differences were found between trimming strategy (P=0.004). Conclusion: Bite trimming strategy for fremitus teeth is a reliable technique to reduce inaccuracies caused by the mobility at maximum intercuspation.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제14권8호
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• pp.773-777
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• 2008

오늘날의 모바일 장비들은 무작위로 움직이는 이동성을 가지고 있어서 보안에 대한 다양한 요구사항을 가지고 있으며 이러한 요구사항을 충족시키기 위해 모바일 장비에 대한 보안기술과 인증기술에 대한 많은 연구가 진행 중이다. 이를 위하여 TCG(Trusted Computing Group)에서는 사용자의 프라이버시를 보호하는 동시에 강력한 인증방법을 제공하기 위하여 보안칩에 해당하는 TPM(Trusted Platform Module)을 설계하고 영지식 증명을 이용한 DAA(Direct Anonymous Attest처ion) 프로토콜을 제시하고 있다. 본 논문에서는 자바를 이용하여 DAA 프로토콜을 소프트웨어로 구현하고 이를 바탕으로 해서 모바일 환경에 적합한 모바일 DAA 모델을 제시한다.

• 대한물리치료과학회지
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• 제8권1호
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• pp.907-915
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• 2001

The purpose of this study is to effectively treat low back pain for the out patients who have been treated at the oriental hospital. Sorting the low back pain patients into four types based on scapular and ilium tilting hyper/hypo mobility characteristics, it has used several kinds of acupuncture stimuli on the 4 motor points of limb skeletal muscles, analyzing the acupuncture treatment on the 12 acupuncture points with which oriental hospitals has given to the low back pain patients and comparing with this effect. It has been analyzed how effectively the acupuncture stimuli has been contributed to the low back pain patients who suffered from skeletal muscles of spinal limb thorax abdominal and spinal skeletal system. The results are as follows. 1. There has been changes after treatment in both the control and experimental groups for low back pain patients, but the latter has been more increased in changes than the former. 2. There were much effects on the balanced restorations for spinal skeletal muscle in both the control group and experimental one, but on terms of restoration degree, the degree of the experimental group was higher than that of the control group. 3. Both the contrastive treatment and the experimental one have been contributed to the balanced restoration for all of the limb thorax abdominal muscles, but there were a few differences in terms of the way for restoration and the effects for improvement according to body types. 4. On both the control and the experimental group, spinal skeletal system has been restored with balance, but the experimental group has been higher effective on the balanced restoration than the one of the control group. Considering these results both the control and the experimental treatments have been contributed to the balanced restorations for all of low back pain patients who were suffering from skeletal muscles of spinal limb thorax abdominal and spinal skeletal system, but the contribution degree for the experimental group has been higher than that of the control group.

• 한국콘텐츠학회논문지
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• 제11권1호
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• pp.357-370
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• 2011

본 논문은 전략집단 이론을 활용하여 PP 사업자의 분석에 대한 현황, 성과와 한계를 살펴보고 개선방향을 모색했다. 기존 전략집단 개념을 활용한 PP사업자 분석의 한계는 전략집단의 도출이 통계결과에 따라 PP의 채널 특징만을 반영했다. 그렇기 때문에 전략 및 전략집단의 유형을 체계적이고 정교하게 분류하기 어려웠고 일반화가 어려운 것으로 나타났다. PP의 전략 변수 선정은 기업 및 사업부 수준(분석수준), 자원 및 경쟁범위와 관련된 변수를 사용했다. 향후에는 보다 적절한 절차에 따라 변수를 객관적으로 선정하여 자의성에 대한 논란을 피해야 할 것이다. PP 사업자의 전략집단 연구의 개선방향은 크게 다섯 가지로 요약되었다. 첫째, 전략 집단 분류 변수를 요인분석하고 몇 개의 요인으로 축약하여 분류기준이 되는 핵심 변수를 선정하는 것이 필요하다. 둘째, 산업 전문가들로부터 변수를 크로스 체크하여 일반화 가능성을 향상시켜야 한다. 셋째, 대리변수를 지양하고 PP 산업 특유의 속성을 반영할 수 있으며 경영자가 인지적 차원에서 지각할 수 있는 전략집단 모델을 연역적으로 개발해야 한다. 넷째, 전략집단의 분류 기준에 이동장벽과 분리기제 개념을 도입하고, 이를 통해 전략집단간 성과 차이를 규명하는 것이 바람직하다. 다섯째, PP 전략집단의 동태적 변화를 관찰하기 위한 종단적 연구가 시도되어야 한다.