• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.5
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• pp.86-92
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• 2017

As the elderly population increases, real-time personal health monitoring is gaining new ground with advances in wireless communications. Such an approach is particularly beneficial to elderly and physically challenged people, as well as those who live alone and are not be able to seek help in case of medical emergencies. The aim of this study is to implement a wearable band which monitors personal vital signs, such as the body temperature and heart rate, and assists with healthcare decisions using a fuzzy logic based decision support system. Since the vital sign data measured from sensors are imprecise and their normal variation with age is nonlinear and not crisp, a fuzzy system is employed to deal with this imprecise or uncertain information. The proposed wearable band is designed to continuously capture and transmit vital signs and healthcare decisions to suitable apps developed for smartphones. In this way, health alerts can be sent to the guardian or caregiver who is registered in the apps.

• Journal of the Korea Convergence Society
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• v.11 no.11
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• pp.19-24
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• 2020

Recently, due to the rapid increase of pets, there is a need for an integrated pet-related personalized product recommendation service such as feed recommendation using a health status check of pets and various collected data. This paper implements a product recommendation system that can perform various personalized services such as collection, pre-processing, analysis, and management of pet-related data using big data. First, the sensor information worn by pets, customer purchase patterns, and SNS information are collected and stored in a database, and a platform capable of customized personalized recommendation services such as feed production and pet health management is implemented using statistical analysis. The platform can provide information to customers by outputting similarity product information about the product to be analyzed and information, and finally outputting the result of recommendation analysis.

• Journal of the Korean Institute of Intelligent Systems
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• v.24 no.2
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• pp.186-192
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• 2014

This study presents the remote control of a board robot using an IMU sensor based on Bluetooth communication. The board robot is a kind of riding robot controlled throng wireless communication by a user. The user wears the proposed IMU sensor controller, and changes a direction of the robot by the angles of IMU sensor. Bluetooth is used for wireless communication between the board robot and its user. The IMU sensor in the remote controller is used for recognition of a number of actions, which are measured as analog signals. The user actions have five commands ('1'right '2'neutrality '3'left '4'operation '5'stop), which are transmitted from the user to the board robot through Bluetooth communication. Experimental results show that proposed IMU interface can effectively control the board robot.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.4
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• pp.781-788
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• 2013

In this paper, we introduce a quadruped robot-based alarm system for monitoring the emergency situation due to falling in the elderly. Quadruped robot includes the FPGA Board(Field Programmable Gate Array) applying a red-color tracking algorithm. To detect a falling of the elderly, a sensor node is worn on chest and accelerations and angular velocities measured by the sensor node are transferred to quadruped robot, and then the emergency signal is transmitted to manager if a fall is detected. Manager controls the robot and then he judges the situation by monitoring the real-time images transmitted from the robot. If emergency situation is decided by the manager, he calls 119. When the fall detection system using only sensor nodes is used, sensitivity of 100% and specificity of 98.98% were measured. Using the combination of the fall detection system and portable camera (robot), the emergency situation was detected to 100 %.

• Archives of design research
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• v.14 no.2
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• pp.95-105
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• 2001

The gait characteristics and shapes of human foot are changed by their diseases and habits. Especially, it is known that the size and shape of foot of the elderly(aged) differ from these of youth foot, because of muscle degeneration and wearing footwear for a long time. Therefore, to design and make last for the elder footwear, anthropometric data measured elder feet and classified their foot type will be necessary. Nevertheless, elder footwear has been designed and made by using the same last of the youth. Therefore, to design elder footwear, we measured 49 anthropometric data on foot of the 252 elderly males and females, and classified their foot shape and type according to FI(foot index) and MPA(matarars-phalanx angle) in this study. The results showed that the elderly has a tendency of slenderizing on foot compare to the youth, and elderly females have more deformed foot type than elderly males. The results can be provided as basic information to the design of elder footwear.

• The Korean Journal of Food And Nutrition
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• v.11 no.2
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• pp.165-170
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• 1998

Diagnostic radiology and conservative management for S75 patient with L1 lumbar fracture by traffic accidents were discussed with references, and then the obtained results were as follows ; 1. Wedging compression fractures with 10% deformity was confirmed at anterior vertebral body of L1 lumbar spine through lateral plain X-ray film. 2. Irregular bony fractures were observed at anterior vertebral body of L1 lumbar spine by CT scans, anatomically T12-L1 sites showed highly frequency of injuries, Denis's fracture type was classified as multiple compression fracture at anterior column without abnormal middle and posterior column, also no Cobb's angle, and then Frankel's neurological classification was E grade. 3. Orthopaedic treatments were performed with conservative methods. With rest on the bed, anti-in-flammatory medication, electrolyte and nutritional solution, the pain diminished. 4. After 3 weeks, rehabilitation was worked with putting on polyethylene back corset, although pains remained slightly until after 8 weeks, thereafter the spine showed gradually stability.

• Journal of Korean Ophthalmic Optics Society
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• v.5 no.2
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• pp.127-138
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• 2000

Differential equations and their solutions were formulated to describe the deflection of both temples and front frames and the pressure exerted by them varying parameters such as elastic modulus, thickness, length, width and shape of crosssection. The effect of such parameters on the deflections of both temples and front frames was illustrated by plotting the solutions of the derived equations. Deflection of temples was found to be maximum where the cross section was diamond-shaped and to be minimum with the rectangular cross section while thickness and cross section area of temples remain constant. The effect of parameters consisting of front frame on the deflection of front frames are very similar to those on temples. The central deflection and pressure of front frame initiated by the temple decreases as the length of temple increases. Detailed analysis of stresses at various parts of the temple will help design custom made spectacle frame as well as most comfortable frames.

• The Journal of Korean Academy of Prosthodontics
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• v.39 no.5
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• pp.502-513
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• 2001

The purpose of this study was to evaluate the effect of dentin pretreatment with Dentin Conditioner, Ultra-Etch, conditioner of Fuji Plus cement on the shear bond strength of resin-reinforced glass ionomer cements to dentin and analyze the fractured surfaces. To evaluate the bond strength, the extracted human teeth which had uniform area of exposed dentin were cemented with conventional glass ionomer cement, 3M $RelyX^{TM}$ Luting (Vitremer luting cement), Fuji Plus cement after dentin pretreatment. The shear bond strength was measured using the Universal testing machine (Instron Co., USA) with a crosshead speed of 1mm/m. The effect of dentin pretreatment was evaluated by observing pretreated dentin surfaces under the scanning electron microscope, measuring the shear bond strength and observing the fractured surfaces under the scanning electron microscope. The results were as follows : On the SEM observation of surface morphology, the specimens treated with Dentin Conditioner. Ultra-Etch and conditioner of Fuji Plus cement were removed the smear layer and funneled dentinal tubules in dentin surfaces. In $RelyX^{TM}$ Luting cement group, shear bond strength of pretreated group was significantly higher than control group. In Fuji Plus cement group and Fuji I group, regardless of the type of pretreatment agents, there was tendency of increase in the shear bond strength. On the SEM observation of fractured surfaces, as the shear bond strength increase, it were shown thicker cement layers and were not shown dentinal tubules According to these results. it were shown that dentin pretreatment have much effect on bonding states.

• Proceedings of the Materials Research Society of Korea Conference
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• 2009.05a
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• pp.59.2-59.2
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• 2009

화학보호복은 독성이 있는 화학물질 및 미세분진등에 대해 공기를 차단하며 완전 밀폐형으로 공기호흡기 및 에어라인 같은 호흡보호장치와 함께 착용하여 신체부위를 보호한다. 그 예로 생물/화학보호복은 유독하고 해로운 생물/화학물질로 부터 인체를 보호해준다. 이들 보호복은 다양한 환경이 노출되어 장시간 작업을 위해서 오랜시간 보호성능을 유지해야한다. 특히, 이런 원단의 구성은 플라스틱과 고무류의 다층구조로 구성되어있다. 플라스틱류(폴리에틸렌, PTFE 등)는 표면장력이 너무 낮아 접착하는데 어려운 점이 많이 대두된다. 일반적인 표면처리방법은 크게 물리화학적 방법으로 4가지로 분류한다. 화학적산화, 불꽃처리, 플라즈마처리, UV 방사법 등이 있다. 이들 중에서 가장 간단한 산화처리는 플라즈마처리다. 이처리는 상온/상압하에서 대기 중 또는 가스내에 방전에 의해 플라즈마를 형성하고 이 플라즈마가 대상물의 표면분자와 격렬히 반응하게 하여 표면의 분자구조를 변화시킴에 따라 소수성의 표면에 Carboxyl, hydroxyl과 carbonyl과 같은 친수성으로 변하여 결합능력을 증가 시켜 표면장력을 높여주는 가장 효과적인 방법이다. 플라즈마 표면처리를 하고 나면 육안으로 표면의 변화를 감지할 수 없지만 접착, 잉크, 코팅을 잘 받아들이는 결과를 가져온다. 플라즈마 표면처리의 효과는 주로 부도체의 필름이나 합성수지 계열의 인쇄성과 접착성을 향상시키고자 많이 활용되고 있는 실정이다. 특히, 화학보호복과 같은 플라스틱류인 다양한 고분자 합성수지(Polyethylene, polypropylene, nylon, vinyl, PVC, PET 등)에 적용가능하다. 본 연구에서는 플라즈마처리조건에 영향을 주는 변수들을 고려하여 실험계획법(DOE, RSM)을 이용하여 최적화된 플라즈마 공정을 향상시키고자한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.11
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• pp.2073-2078
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• 2016

Recently, there have been many research that recognize the situation using sensors. However, sensor data collection and analysis are still lacking in integration. This is because the data generated by the sensor is difficult to match in terms of metadata and units. Therefore, a methodology for efficiently using data generated from various sensors is needed. In this paper, we propose a system that recognizes the location through information generated from a moving iBeacon. This system constructs the ontology with the data that can recognize the exact position when the patient wearing iBeacon moves in the room. This maps standard items and sensor items, and stores the results of filtering the detected values as knowledge. the system can extract efficient location information by recognizing the value generated by moving the patient carrying iBeacon through the ontology. This can be applied not only to beacons but also to other sensors, and it can be applied variously according to the ontology configuration.