• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2013년도 추계학술발표대회
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• pp.406-408
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• 2013

최근 스마트폰이 급격하게 발달함에 따라 많은 사람들에게 보급화 되었다. 스마트폰의 다양한 기능과 휴대성은 대중화의 시발점으로 많은 사람들에게 편리함을 제공해주고 있다. 이에 사용자들이 가장 기초적으로 사용하는 문자 입력을 보다 편리하고 신속하게 입력하기 위한 방법들에 대한 많은 연구 및 응용 프로그램 개발이 활발히 진행되고 있다. 하지만, 많은 키패드가 만들어졌음에도 불구하고, 사용자가 습득하기 위한 지연시간이 발생될 뿐만 아니라, 오타가 빈번하게 나타나고 있다. 본 논문에서는 스마트 UI/UX를 통해 최소 한 번의 누름으로 문자 및 문장을 완성할 수 있는 SUI-K를 제안한다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2013년도 추계학술발표대회
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• pp.735-737
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• 2013

IT 발전의 빠른 진보성으로 인해 탄생된 스마트 디바이스는 급격한 대중화가 이루어지고 있다. 많은 사람들이 편리한 기능과 휴대성을 갖춘 스마트 디바이스에 의존하게 되면서 개인 정보 보호를 위한 화면 잠금 기능 연구가 활발하게 진행되고 있다. 이에 사용자들은 다양한 화면 잠금 기능을 선택하여 설정 할 수 있다. 다양한 화면 잠금 기능 중에 패턴 락은 직관적인 인터페이스로 인한 편리함과 보안성으로 인해 많은 사용자가 사용하고 있다. 하지만, 패턴 락은 한정된 화면 잠금 패턴 기능을 가지고 있으며 화면 잠금을 해제하는 경우에 쉽게 타인에게 패턴이 노출된다. 이에 본 논문에서는 8-방향성을 기반으로 동작하고 패턴 락의 한정된 패턴 수와 타인에 대한 패턴 노출을 개선하여 보안성을 높인 SDL(Smart Device Lock)-8way를 제안한다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 춘계학술대회
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• pp.326-329
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• 2009

기존의 Nurse Call 제품은 환자가 비상 call을 하였을 때 환자의 이름과 병실만 간호사의 단말기에 표시되므로, 환자가 병실이 아닌 다른 장소에 있는 경우에는 환자의 위치를 찾기가 어려운 상황이다. 따라서 환자가 병실이 아닌 다른 장소에서 긴급 call을 하는 경우에는 환자의 위치를 알 수 없어 찾는데 많은 시간을 소요할 수가 있어 위급한 환자에게는 큰 타격을 줄 수 있다. 따라서 본 논문에서는 SOFM을 이용하여 중계기를 최적으로 배치하고 배치한 정보와 RSSI를 이용하여 환자의 위치를 찾아낼 수 있는 무선 너스 콜 시스템을 제안하였다. 제안한 시스템의 유용성을 확인하기 위하여 실험한 결과 위치 정보를 오차 범위 내에서 얻을 수 있었다.

• 대한한의학방제학회지
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• 제30권3호
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• pp.155-163
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• 2022

Objectives : Lonicera japonica is known for anti-inflammation and antibiotic effect in Korean medicine. This study aimed for investigating the cytoprotective effect of Lonicera japonica extract (LJE) for HepG2 cells against arachidonic acid (AA)+iron-induced oxidative stress. Methods : The effect of LJE on cell viability was assessed by MTT assay. ROS assay was selected to assess antioxidant effect of LJE. To assess LJE's effect on mitochondrial function, flow cytometric analysis was operated. And immunoblot analysis was used to establish the underlying mechanism of LJE. Results : LJE protected HepG2 cells against AA+iron-induced oxidative stress by phosphorylation of liver kinase B1 and blocked the decline of procaspase 3. Also, LJE preserved the mitochondrial membrane permeability induced by AA+iron. Conclusion : LJE protected the hepatocyte from AA+iron-induced oxidative stress by activation of LKB1 by the preservation of mitochondrial functions.

• 대한전자공학회논문지
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• 제23권2호
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• pp.243-248
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• 1986

The impurities in As and Ga sources and the contamination of the GaAs substrate prior to growing of MBE GaAs epitaxial layer have been investigated using RHEED, AES and RGA methods. The as source was contaminated by H2O, CO, CO2 and AsO, and the Ga source was contaminated by H2, H2O, CO and CO2. These contaminants could easily be removed by prebaking the source. On the other hand, GaAs substrate was contaminated principally carbon and oxygen. The oxygen could easily be removed by heating the substrate above 480\ulcorner, and the carbon could also be reduced by sputtering the substrate with 1ke V Ar+. The chemically etched substrate surface prior to growing the layer was rough, but it was made to be smooth and clean by heating it above 530 \ulcorner.

• 한국환경과학회지
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• 제33권6호
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• pp.427-434
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• 2024

This study took six individuals (three females and three males) from October 2017 to October 2018 to analyze the home range of Pteromys volans. A 3.5-g GPS tag was used to track the ranges, and a nest box was used to capture them. The home range was analyzed using MCP and KDE with the home range tool ArcGIS 10.3 (ESRI). As a result, it was found that the mean home ranges were MCP 100% 6.63±7.96 ha, MCP 95% 5.47±6.44 ha, and KDE 50% 4.43±5.87 ha. It was also found that the males (11.16±9.69 ha, MCP 100%) had wider home ranges than the females (2.11±1.76 ha, MCP 100%). In addition, during the non-winter season, males had a wider home range, including the home ranges of several females, and other overlapping home ranges were observed. In the winter season, the home ranges (0.15±0.47 ha, MCP 100%) became much smaller than in the non-winter season (9.88±6.90 ha, MCP 100%), and no overlap of the home ranges was observed.

• 대한영상의학회지
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• 제83권6호
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• pp.1400-1405
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• 2022

좌심방 부속기 동맥류는 심장 빗살근의 선천성 이형성이나 승모판 또는 심근의 후천적 병변에 의해 생길 수 있는 매우 드문 심장 질환이다. 주로 흉부 CT나 심초음파에서 좌심방이 비정상적 팽창되어 우연히 발견되며, 환자의 대부분은 무증상이지만 생명을 위협하는 합병증과 관련이 있어 외과적 치료를 필요로 한다. 그러므로 정확한 진단과 함께 이에 동반된 합병증을 찾아내는 것은 중요하다. 본 증례 보고에서는 수술적 치료로 확진 된 53세 여성의 좌심방 부속기 동맥류를 소개하고 병태생리학을 바탕으로 진단과 함께 놓치지 말아야 할 합병증에 대한 CT 및 MRI 검사의 소견을 소개하고자 한다.

• 정보보호학회지
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• 제31권3호
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• pp.21-28
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• 2021

최근 코로나19 바이러스 감염병 유행으로 전 세계 다수 기업에서는 재택근무제도를 도입했다. 재택근무 경험자 중 절반 이상이 보안위협을 경험하였으며, 다수 기업에서는 자산정보를 보호하기 위해 사내 정보보안 강화에 더욱 중요해졌다. 재택근무를 하기 위해 근로자는 주로 가상사설망을 이용하여 업무를 수행한다. 재택근무제도의 활용도가 높아짐에 따라 재택근무 관련 사이버보안 위협은 증가하고 있다. 이러한 사이버 위협이 증가하고 있으며 가상사설망에서의 보안관제는 앞으로 매우 중요하다. 본 연구는 안전한 재택근무를 위해 가상사설망에서 발생하는 사이버위협에 대한 요소를 정리하여 효율적이고 체계적인 가상사설망을 활용한 보안 강화 방안에 대해 연구한다.

• 대한의용생체공학회:의공학회지
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• 제42권3호
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• pp.86-93
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• 2021

Purpose: The purpose of this study is to find out the cognizance of medical device safety information (MDSI) monitoring in the hospital and oriental hospital workers, and the different aspect of MDSI between oriental medical devices and medical devices. Methods: The survey was performed both in the oriental medicine hospital and general hospital. The survey had 16 items; 2 items basic questions, 5 items in the awareness of MDSI, 5 items in the education of MDSI, 4 items in the necessity of defining oriental medical devices and differences between general and oriental medical devices. A total of 120 hospital worker were participated; 60 oriental medicine hospital workers and 60 general hospital workers. They had worked in the oriental medicine or general hospital associated with 'Medical Device Safety Monitoring Center, Dongguk University Ilsan Hospital' in 2019 and 2020. Results: The cognizance of MDSI was high both in oriental medicine hospital and general hospital workers and there were no significant differences between oriental medicine and general hospital workers. When we divided the hospital workers into the senior workers who had worked for over 3 years and junior workers for less than 3 years, the senior workers had higher awareness of MDSI than junior workers. However, the cognizance of education of MDSI was high which was not different between senior and junior workers. Both hospital workers thought that it was necessary to define oriental medicine device legally and the oriental medical device might have low risk and less side effect than medical device. Conclusion: The cognizance of MDSI was high and there was no significant differences between oriental medicine and general hospital workers. Because the senior hospital workers had higher recognition of MDSI, we need to provide the continuous education program for junior hospital workers. Although oriental medical device are thought to be safer than medical device, we need to have a legal definition.

• 대한한방소아과학회지
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• 제35권1호
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• pp.139-147
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• 2021

Objectives The purpose of this study is to investigate differences in brain activities when Neurodevelopmental treatment (NDT) is used alone compare to NDT is combined with intradermal acupuncture (IDA) treatment, using functional infrared spectroscopy (fNIRS) Methods Three children less than 7 year-old with cerebral palsy were participated. On their first visit, only NDT was used. After a week, they were treated with both NDT and IDA. During the treatment, fNIRS was used to measure any changes in their brain activities. Results In first patient with NDT, oxyhemoglobin level was increased during Standing exercise and Gait training compared to resting state. When the patient was treated with NDT and IDA, oxyhemoglobin level was decreased during Standing exercise and Gait training compared to resting state, and the result was significant (p<0.05). In second patient, oxyhemoglobin level was decreased in Gait training compared to resting state when NDT was used, but the level was increased when NDT and IDA were used in Gait training compared to resting state (p<0.05). In third patient, the difference in oxyhemoglobin levels between Gait training and resting state was significant (p<0.05). Conclusions Treatment involving both NDT and IDA has more potential to improve brain activities compared to that of NDT alone, and no adverse effect was reported. In order to confirm the finding, larger scale randomized controlled trials are needed.