• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.1074-1075
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• 2023

용접작업은 다양한 산업에서 이루어지는 중요한 작업인데 반해, 여러 가지 위험요소들로 인해 작업자의 건강에 위협을 가할 수 있다. 또한, 용접 작업자들을 효율적으로 관리할 수 있는 안전점검인력이 부족한 실정이다. 이에 본 논문은 항만 용접 작업자의 안전을 위한 스마트헬멧 제작과 연동 APP을 개발하여, 체계적으로 작업자의 건강을 관리하고 안전사고를 미연에 방지하는 데에 그 목적이 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2024.05a
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• pp.169-170
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• 2024

생활 습관 중 일상에서의 물 섭취량을 정확히 관리하는 것은 중요하다. 본 논문은 IoT 코스터와 안드로이드 앱으로 구성된 시스템을 제시하며, 물 섭취 습관을 추적하고 개선한다. 로드셀을 활용하여 코스터 위에 올려진 텀블러의 무게를 측정하고 마신 물의 양을 계산하여 앱으로 데이터를 전송한다. 이를 통해 사용자는 자신의 수분 섭취량을 정확하게 모니터링하고 더 나은 물 마시기 습관을 형성할 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2024.05a
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• pp.179-180
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• 2024

영상에서 객체를 인식하는 다양한 알고리즘이 제안되고 있으며 인식된 결과를 통해 새로운 서비스를 사용자에게 제공하는 사례가 늘어나고 있다. 본 논문에서는 카메라를 탑재한 임베디드 기기에서 영상을 촬영하고 촬영된 영상에서 의자와 사람을 탐지하여 학습공간의 혼잡도를 분석하는 앱을 설계하고 구현하였다. 구현 과정에서 실험을 통해 실시간성 확보 여부와 의자를 통한 빈자리 분할이 가능하다는 것과 앱에서도 모니터링 할 수 있다는 것을 검증하였다.

• Journal of Industrial Technology
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• v.6
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• pp.19-31
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• 1986

The residence time distribution of liquid flow in a 4.0cm diameter column packed with porous $Al_2O_3$ spheres of 0.37cm diameter were measured with pulse injections of a tracer under cocurrent trickling flow conditions. The mean residence time of liquid flow and liquid hold-up calculated by the transient curve of tracer were unaffected by gas flow rates under experimental ranges of liquid flow rates from 2.4 to $4.5(kg/m^2\;sec)$ and gas flow rates from 0 to $0.13(kg/m^2\;sec)$. The axial dispersion coefficient of liquid stream and apparent diffusivity of tracer in a micropore of solid particle were estimated from the response curve of tracer. The calculated Peclet No. were increased in ranges of 68-to 82 with a increasing of liquid mass velocity, and the external effective contacting efficiency between liquid and solid which can be expressed. by $(D_i)_{app}/D_i$ varied in ranges of 0.54 to 0.68 depending on the liquid flow rates. The gas to liquid(water) volumetric mass transfer coefficient were determined from desorption experiments with oxygen at $25^{\circ}C$ and 1 atm. The measured mass transfer coefficients were increased with liquid flow rates and the effect of gas flow rates on the mass transfer coefficient was insignificant.

• The Journal of the Korea institute of electronic communication sciences
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• v.11 no.3
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• pp.245-252
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• 2016

The Service Platform for going to Kindergarten configured with Beacon Devices, Gateway attached to the BUS, Mobile Communication Network, and Application Server. In this paper, We understand the need for Commuting Kindergarten Services, And interface to Specification of Kindergartener's Beacon Identification, And so design to Gateway Resource Tree Functions. For the Service Interfacing, Commute alerts handled in Parental Cellphone through APP. The Service Platform can check the registered beacon data collection and operation management function.

• Biomedical Science Letters
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• v.7 no.3
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• pp.103-110
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• 2001

$\alpha$-Fetoprotein(AFP) is a good marker for the detection of several diseases such as hepatocellular carcinoma, gonadal germ cell tumor, gastric tumor, and Down's syndrome. In this study, we developed ELISA, using synthetic peptides corresponding to the epitopes of AFP. Five kinds of peptides were synthesized from AFP to produce antibodies in rats that recognize AFP in human plasma as well as amniotic fluid and do not cross-react with serum albumin. All five kinds of antibodies showed good reactivities with their peptide-keyhole limpet hemocyanin conjugates. Anti-synthetic peptide 1 (R-N-E-Y-G-I-A-S-I-L, 4-13) antibody, in particular, reacted well with AEP as well as synthetic peptide 1-KLH but not with human serum albumin. The binding affinity(Kd) was 2.7$\times$10$^{-9}$M for peptide 1 and 6.8$\times$10$^{-8}$M for AEP. The range for measurement of AFP was 10~1,000 ng/ml. The within-assay and between-assay coefficients of variance(CV) were 4.83% and 10.97%, respectively. In a sample of 31 sera and 33 amniotic fluids, there was a good correlation between AFP values determined in this assay and those in a commercial kit. These results indicate that the antibodies against synthetic peptides corresponding to the epitopes of AFP are highly specific to APP and synthetic peptide-based ELISA would be useful for the measurement of human AFP.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.513-514
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• 2018

Recently, IoT(Internet of Things) technology is being actively used to develop smart products and services. This paper proposes the architecture and major functionalities of IoT outdoor exercise equipment using ARTIK IoT Platform. It provides an exerciser with date&time, weather information, the amount of exercise. The amount of exercise and a user's ID are sent to a service server by LTE-M modem and the server provides the exercise history by web or smartphone app. As additional functionalities, a fine dust alarm light and an emergency alarm button are embedded. The proposed system has been exhibited on CHINA SPORT SHOW 2018 held on Shanghai, China.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1998.06a
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• pp.391-394
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• 1998

Electroluminescence is the light emission obtained by an electrical excitation energy passing through a phosphor under an applied high electrical field. EL are paid much attention on flat panel display as a backlight and indicator, which are divided into ACPRL(alternating-current powder electroluminescent) and ACTFEL(alternating-current powder electroluminescent). In this paper, Electric and emission properties on ACPEL are investigated based on ZnS:Cu phosphor. The basic structure on this is ITO glass/phosphor/insulator/ backelectrode, CR-M which has high efficiency on thermal properties and dielectric Properties was introduced and BaTiO$_3$ as a insulating layer in order to increase app1ied electric field on phosphor. Changing on Dielectric and emission Properties was caused by a different viscosity of binder which filled on space between phosphor particle. 60cd/$m^2$ under 60V, 2kHz sinusoidal was gotten from ACPELD prepared in this work.

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.5
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• pp.1109-1116
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• 2018

The purpose of this study is to solve the loss of personal belongings by utilizing monitoring function of IoT platform. The beacon to combined with personal belongings are registered with the application server, the trigger processing function according to the occurrence of the lost event is performed intelligently through the device, the app, the IoT network, and the application server.

• Knowledge Management Research
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• v.23 no.4
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• pp.113-132
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• 2022

The development of information and communication technologies (ICT) and changes in medical services centering on daily life have ushered in an era of self-management through the smartphone health management app (mHealth). This study identified the factors affecting mHealth use among older adults with diabetes. A structured survey was conducted using online and offline channels for 252 older adults who were over 65 and had diabetes. The collected data were subjected to hierarchical multiple regression analyses, and subjective health status, e-health literacy, and interaction terms of social support were inputted to verify moderating effect. The main results of this study are as follows. First, mHealth use among older adults with diabetes was higher in the male, type 2 diabetes, and younger age groups. Second, the higher was the e-health literacy, the higher was the mHealth use. Third, a negative moderating effect of social support was found in the relationship between subjective health status and mHealth use. We expect this study to provide researchers and managers interested in mHealth and older adults with diabetes, with valuable theoretical and practical implications. Furthermore, this study contributes to improving mHealth use among older adults with diabetes and building a digitally inclusive society.