• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.1362-1364
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• 2012

최근 스마트폰이 보편화되고 관심이 증대됨에 따라 신체적으로 약자인 고연령층의 사용자가 늘어나게 되었고 따라서 이러한 최신IT에 비교적 약자인 사람들을 위한 인터페이스가 중요하게 되었다. 현재 스마트폰에서 기본적인 메인화면의 구성은 일정한 크기의 아이콘이 $4{\times}4$ 행렬로 정렬 되어있다. 이런 아이콘의 개수와 배열을 조정할 수 있다하더라도 일시적으로 적용되거나 조정할 때 복잡한 설정과정을 거쳐야 한다. 본 연구에서는 직관적인 사용자의 멀티 터치 등의 조작에 따라 아이콘의 배열과 크기 및 페이지 크기 조정이 가능한 메인 UI를 제안한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.11a
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• pp.200-203
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• 2020

사물인터넷을 기반으로 실시간으로 승강기의 상태를 확인하고 제어가 가능한 웹 관리 시스템과 애플리케이션을 설계하였다. 웹 관리 시스템에서는 회원 정보의 수정과 열람, 승강기의 상태확인 및 변경을 할 수 있으며 애플리케이션에서는 회원 등록과 승강기의 호출 및 상태확인이 가능하다. 본 논문에서는 승강기 제어장치의 설계 부분인 UML(Unified Modeling Language)을 활용한 여러 다이어그램과 애플리케이션의 UI를 볼 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.05a
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• pp.95-98
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• 2020

최근 스마트 홈에서 슬립테크를 제어할 수 있는 어플리케이션 개발 및 연구의 필요성이 높아지고 있다. 기존 스마트 홈 제어 어플리케이션들은 텍스트 형식의 UI, 직관적인 정보 제공의 부재, 스마트 스위치 수준의 서비스 제공 등의 문제점을 가지고 있다. 이러한 문제점을 개선하기 위해 본 논문에서는 증강현실과 3D 모델링을 통해 스마트 홈을 보다 직관적이고 편리하게 사용할 수 있는 슬립테크 제어 방법을 제안한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.11a
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• pp.911-914
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• 2007

최근 홈 네트워크 기술의 발달로 다양한 홈 네트워크 장치들이 개발되고 있다. 하지만 홈 네트워크 장치들을 제어하는 어플리케이션은 로컬에서만 가능하거나 특정한 기기와 그 플랫폼에 맞는 프로그램을 설치해야만 장치의 제어가 가능하다. 본 논문에서 이러한 문제점을 보안하기 위해 웹 서비스를 이용한 홈 네트워크 장치의 원격 제어 시스템의 구성과 웹 브라우저를 통한 웹 시나리오 빌더를 제안한다. 제안한 웹 시나리오 빌더는 네트워크 카메라로 댁내 상황을 알려주고, 시나리오를 제어 가능하게 하는 등 다양한 기능을 제공한다. 그리고 타블렛이나 터치스크린으로도 조작할 수 있는 간단한 UI 를 제공하며 웹 서비스를 이용하므로 PDA 나 모바일 기기로의 확장이 가능하다.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.32 no.6
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• pp.592-596
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• 2010

The common local causes of active gingival bleeding are the vessel engorgement and erosion by severe inflammation and injury to hypervascularity lesion. Abnormal gingival bleeding is also associated with systemic bleeding disorders (liver disease, leukemia etc.). There are many conventional methods for gingival bleeding control, such as, direct pressure, packing, electrocoagulation, tight suture and application of hemostatic agents. If the continuous gingival bleeding is not stopped in spite of the all local application methods, the medical consultation should be obtained for systemic condition care and the major feeding arterial embolization. This is a case report of severe gingival bleeding and periodontitis control in a patient with liver cirrhosis and oral metastatic lesion of hepatocellular carcinoma. The bleeding lesion was placed in left buccal mucosa and gingiva of the left mandibular molars. The control methods were dental crown removal, primary endodontic drainage, gingival sulcus drainage and maxillary arterial embolization with medical consultation.

• Environmental Mutagens and Carcinogens
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• v.18 no.1
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• pp.22-25
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• 1998

Anticarcinogenic activity of astaxanthin-containing egg yolks (designate AEY) was investigated for 7,12-dimethylbenz[a]anthracene (DMBA)-induced two stage mouse epidermal carcinogenesis. Female ICR mouse (6-7 weeks of age) were house in a humidity-and-temperature-controlled facility and subjected to feed and water ad libitum. AEY (10 mg/0.2 ml acetone) was painted on the back of mice 7 days, 3 days and 5 min before DMBA treatment (50 nmole/0.2 ml acetone). One week later after DMBA treatment, 6 ${\mu}g$ tetradecanoyl 12-phorbol 13-O-acetate (TPA) dissolved in 0.2 ml acetone was applied on the mouse twice weekly over a period of 22 weeks. No sample was given to control mice. Control egg yolk (CEY) and astaxanthin-containing oil (designate AO) from Phaffia rhodozyma were used as positive controls. Mouse treated with AEY exhibited 10 tumors per mouse whereas control mouse exhibited 15 tumors per mouse, the fact that 33% reduction of tumor per mouse by AEY treatment. Tumor incidence was also reduced to 15% by AEY treatment when compared to that of control group. Such effects were also seen in CEY and AO treatment groups, but leaser extent. AO gave reduction of food intake and body weights relative to those of AEY and CEY, indicating toxicity of AO. These results suggest that AEY exhibits anticarcinogenic activity for DMBA-induced mouse epidermal carcinogenesis.

• Journal of Korean Society for Atmospheric Environment
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• v.27 no.6
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• pp.641-649
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• 2011

The aim of this study is to understand the characteristics of exhausting particulate matters (PM) and to control emitted PM from meat cooking restaurants. We found that $PM_{2.5}$, $PM_{5.0}$ occupy 69.2% and 98.6% of total PM from pork cooking, respectively. Therefore, we can see that it is not easy to remove PM generated from a pork cooking process. The collection efficiencies of various control devices, which are a condensing scrubber, a cyclone, an impactor, an oil filter and an electrostatic precipitator (ESP), were measured and compared. ESP had the highest collection efficiency (88.6%) and condensing scrubber had the lowest one (68.0%). However, the system recovering property should be considered to choose a control device because PM from meat cooking process are extremely stickiness. Therefore, we can recommend that ESP following an impactor or a cyclone is the best combination to remove PM generated from meat cooking restaurants.

• Journal of the Institute of Convergence Signal Processing
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• v.19 no.2
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• pp.54-60
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• 2018

In this paper, we propose an efficient automatic control method for the collision avoidance of drones. In general, the drones are controlled by transmitting to the flight control (FC) module the received PWM signals transmitted from a RC controller which transduce movements of the knob into PWM signal. We implemented the collision avoidance module in-between receiver and FC module to monitor and change the throttle, pitch and roll control signals to avoid drone collision. In order to avoid the collision, a LiDAR distance sensor and a servo-motor are installed and periodically measure the obstacle distance within -45 degrees from 45 degrees in flight direction. If the collision is predicted, the received PWM signal is changed and transmitted to the FC module to prevent the collision. We applied our proposed method to a hexacopter and the experimental results show that the safety is improved because it can prevent the collision caused by the inadvertency or inexperienced maneuver.

• Journal of Korean Association for Spatial Structures
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• v.10 no.3
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• pp.65-74
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• 2010

In this study, the vibration control effect according to the installation location of the sky-bridge and the difference of natural periods of the connected buildings has been investigated. To this end, 40-story and 50-story building structures connected by a sky-bridge were used as example structures and the equivalent modeling method was used. Boundary nonlinear time history analyses were performed using El Centro and Taft earthquakes to investigate the dynamic behavior of the example structures and vibration control effect of the sky-bridge. Based on numerical results, it has been shown that displacement responses can be effectively controlled as the installation floor of the sky-bridge increases and acceleration responses can be effectively reduced when the sky-bridge is installed on the mid-stories of the example building.

• Journal of Institute of Control, Robotics and Systems
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• v.3 no.6
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• pp.644-651
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• 1997

In the water purification plant, chemicals are injected for quick purification of raw water. It is clear that the amount of chemicals intrinsically depends on water quality such as turbidity, temperature, pH and alkalinity. However, the process of chemical reaction to improve water quality (e.g., turbidity) by chemicals is not yet fully clarified nor quantified. The feedback signal in the process of coagulant dosage, which should be measured (through the sensor of the plant) to compute the appropriate amount of chemicals, is also not available. Most traditional methods focus on judging the conditions of purifying reaction and determine the amounts of chemicals through manual operation of field experts using Jar-test data. In this paper, a systematic control strategy is proposed to derive the optimum dosage of coagulant, PAC(Polymerized Aluminium Chloride), using Jar-test results. A neural network model is developed for coagulant dosing and purifying process by means of six input variables (turbidity, temperature, pH, alkalinity of raw water, PAC feed rate, turbidity in flocculation) and one output variable, while considering the relationships to the reaction of coagulation and flocculation. The model is utilized to derive the optimum coagulant dosage (in the sense of minimizing turbidity of water in flocculator). The ability of the proposed control scheme validated through the field test has proved to be of considerable practical value.