• 한국해양학회지:바다
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• 제12권3호
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• pp.244-250
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• 2007

MIMS 시스템은 액체 시료의 용존 가스 농도를 정확하게 측정하는데 이용되어 왔는데, 본 연구에서는 해수와 퇴적물 공극수에 존재하는 용존 메탄 농도를 정량화하는데 사용되었다. 측정의 정밀성을 파악하기 위하여, 여러 분압의 메탄 농도에 대해서 포화된 액체 시료를 준비하였으며 이를 MIMS 시스템으로 측정하였다. 측정된 값은 용존 기체의 포화 상수로부터 계산된 값과 잘 일치하였다. 측정의 표준 오차는 평균값의 $0.13{\sim}0.9%$ 정도였다. 이 시스템을 이용하여 한반도 남해안 인근 해수의 용존 메탄 농도를 측정한 결과, 용존 메탄의 깊이별 분포는 물리적인 요소가 좌우하고 있음을 알 수 있었다. MIMS system을 이용하여, 각 수괴 간의 미세한 용존 메탄 농도의 차이를 구분하여 살펴볼 수 있었다. 또 다른 실험에서는 MIMS 시스템의 inlet 부분을 탐침 형태로 제작하여 퇴적물 깊이에 따른 용존 메탄을 측정할 수 있었다.

• 한국CDE학회논문집
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• 제9권3호
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• pp.246-252
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• 2004

Presented in this Paper is a Micro Machining Service .(MIMS) based on the World Wide Web technologies. In order to ensure easy access to the service, the web browsers are used as the user interface. The pan geometry as an STL file is uploaded with process parameter for 3-axis CNC milling. Depending on the predefined user level, novice or expert, the user interface requires different parameters for process planning. An STL-based CAM resides in the server and automatically provides NC codes upon user's request. Tool-paths for scanning and pencil-cut, which are interference-free and precise, are created by the curve-based polyhedral machining method. A couple of sample parts were fabricated by a micro endmill with 127 fm diameter. From the tests, the parts fabricated by scanning followed by pencil-cut resulted in less error(within 2%) than the parts machined only by scanning tool-path.

• Asia pacific journal of information systems
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• 제30권1호
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• pp.120-142
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• 2020

Present-day organizations have become largely dependent on mobile instant messaging services (MIMs) for various organizational purposes. Focusing on the increasing use of MIMs in today's organizations, this study aims to explain how different aspects of KakaoTalk, the most dominant MIM in Korea, influence employees' attitudes toward their current employers, and how these attitudes impact the employees' intentions to stay at their present workplaces. Overall, with the exception of one factor (satisfaction with KakaoTalk use), all other factors (perceived quality of information exchanged through KakaoTalk, belongingness through KakaoTalk, and KakaoTalk overload) significantly influenced employee's attractiveness toward their current employers. Specifically, while KakaoTalk overload's effect on perceived organizational attractiveness was negative, two other factors were positively associated with it. Perceived organizational attractiveness also strongly influenced employees' intention to stay at their present workplaces. These findings contribute to expanding practical and theoretical understandings regarding the critical roles of MIMs in the efficient management of organizations in this hyperconnected society.

• Bulletin of the Korean Chemical Society
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• 제32권9호
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• pp.3348-3354
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• 2011

Oleanolic acid (OA) as template molecule, polyamide-6 (PA6) as basement membrane and poly(styrene-comaleic acid) (PSMA) were used to prepare PA6/PSMA-OA molecularly imprinted composite membranes by phase inversion method in supercritical $CO_2$ ($ScCO_2$). The template molecule (OA), [poly(styrene-co-maleic anhydride) (PSMAH), PSMA, molecularly imprinted membranes (MIMs) imprinting OA and MIMs after elution were all characterized by Fourier transform infrared spectroscopy (FTIR). The conditions that were the mass ratio between PSMA and OA from 3:1 to 8:1, temperature of $ScCO_2$ from $35^{\circ}C$ to $50^{\circ}C$ and pressure of $ScCO_2$ 12 MPa to 17 MPa were studied. It was obtained the largest adsorption rate and purity of OA after adsorption of the resultant MIMs, 50.41% and 96.15% respectively. After using PA6 film and non-woven fabrics as basement membrane respectively, it was found that smaller aperture of PA6 was used as basement membrane, a higher adsorption rate and a higher purity of OA after adsorption of the MIMs were obtained, and so were the stability and reproducibility of the resultant MIMs. After template molecules being removed, the MIMs had effective selectivity hydrogen bonding to separately bind in the binary components to the template molecules-oleanolic acid.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제46권2호
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• pp.143-149
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• 2020

Objectives: Long-term facial paralysis results in degeneration of the distal nerve segment and atrophy of the supplied muscles. Options for these patients include free muscle transfer, temporalis myoplasty, and botulinum toxin injections for smile reanimation. In this study we aimed to evaluate the subjective and objective outcomes of these procedures. Materials and Methods: In our study, we retrospectively analyzed smile symmetry in patients with facial palsy (n=8) who underwent facial reanimation procedures. Results: Subjective analysis showed high satisfaction in seven out of eight patients. Objective analysis showed statistically significant improvement postoperatively in both vertical and horizontal smile symmetry at rest and during maximum smile (P<0.001). Conclusion: Choosing the ideal procedure for the patients is the most critical aspect for facial reanimation. Though free muscle transfer is considered gold standard procedure, temporalis myoplasty also gives satisfactory results. Residual synkinesis which can lead to disturbing aesthetic deformity can be effectively treated with botulinum toxin.

• Bulletin of the Korean Chemical Society
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• 제23권12호
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• pp.1769-1772
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• 2002

Previous $^{19}F\;and\;^{1,2}H$ electron-nuclear double resonance (ENDOR) study of fluorometmyoglobin (MbF) in frozen-solution state provided sensitive tools sensing subtle structural changes of the heme that are not obtainable from X-ray. [Fann et al., J. Am. Chem. Soc. 1995, 117, 6019] Because of the intrinsic inhomogeneouse EPR line broadening effect of MbF in frozen-solution state, detection of the intrinsic inhomogeneouse EPR line broadening effect of MbF in frozen-solution state, detection of the electronic and geometrical changes of the heme ring itself and the proximal histidine by using $^{14}N$ CW ENDOR was interfered. In the present study, hyperfine-sensitive $^{14}N$ Mims ENDOR technique of pulsed-EPR was employed to probe the changes. With two different $\tau$ values of 128 and 196 ns, $^{14}N$ ENDOR signals of the heme and proximal histidine were completely resolved at $g'_{II}(=g_e=2)$. This study present that X-band $^{14}N$ Mims ENDOR sequence can sensitively detect the small changes of the spin densities and p orbital populations of the proximal and the heme nitrogens, caused by ligand and pH variation of the distal site.

• 소프트웨어공모대전
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• 통권11호
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• pp.160-169
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• 2006

• 한국정보과학회논문지:데이타베이스
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• 제32권3호
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• pp.254-262
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• 2005

이 논문은 다차원 범위 질의를 위한 순차 색인 기법인 세그먼트-페이지 색인(SP-색인)이라는 새로운 색인 기법을 제안한다. SP-색인의 목표는 (1) 다차원 색인 기법에서의 범위 질의의 성능 향상, (2) 과도한 색인의 재구성 없이 색인의 클러스터링이라는 두 가지로 요약된다. 오랜 동안의 데이타베이스 연구 결과로 다양한 다차원 색인 기법이 개발 되었지만, 대부분의 연구가 데이타 레벨의 클러스터링에 초점을 맞추었고, 색인 자체의 클러스터링에는 거의 관심을 두지 않았다. 따라서 대부분의 관련된 색인 노드가 디스크에 분산되고, 질의 처리 시에 많은 무작위 디스크 접근이 발생한다. SP-색인은 관련된 노드를 연속적인 디스크 페이지로 구성되는 하나의 세그먼트에 저장하여 노드들의 분산을 피하고, 세그먼트 내에서의 순차 접근을 통해 질의 처리 성능을 높인다. 실험 결과에 따르면 SP-색인은 페이지 기반의 전통적인 색인기법에 비해 수행 시간 면에서 수 배의 성능 향상을 보이고, 단순히 큰 페이지를 사용에 따른 디스크 대역폭 낭비를 줄인다.

• 한국막학회:학술대회논문집
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• 한국막학회 1994년도 춘계 총회 및 학술발표회
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• pp.29-32
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• 1994

The increasing environmental risks exert strong demands for the knowledge of environmentally significant compounds and the reduction of such compounds on the earth. The risk reduction can, in principle, be most effectively achieved by minimizing the formation of environmental pollutants, by-products in many cases, during processes in factories, power plants and other sources. This can be done by on-line, real time monitoring the formation of pollutants at the moment when they are formed, and thereby through the feed-back control of the process.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제44권3호
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• pp.103-106
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• 2018

Objectives: The goal of the study was to investigate the clinical effects of amoxicillin-clavulanic acid (500+125 mg) with metronidazole 400 mg administered three times daily (Group I) versus azithromycin 500 mg administered once daily and with metronidazole 400 mg three times daily (Group II) for the prevention of postoperative infection following mandibular third molar surgical removal. Materials and Methods: The study design was a single-center prospective study. Patients who reported to the Department of Oral and Maxillofacial Surgery between February 2015 and January 2017 for removal of mandibular third molar were screened, and 108 patients were chosen. One surgeon carried out all procedures. Patients were prescribed antibiotics until the two groups contained a similar number of cases. Results: Our data showed that Group II had fewer incidences of surgical site infection, but with no statistical significance. Conclusion: Although both treatments are used routinely after removal of the mandibular third molar, neither is significantly better than the other.