유비쿼터스 센서 네트워크용 LED 가시광통신 송수신 모듈 및 효율 연구

장태수,권재현,김용갑,박춘배,Jang, Tae-Su,Kwon, Jae-Hyun,Kim, Yong-Kab,Park, Choon-Bae 한국전자통신학회 2012 한국전자통신학회 논문지 Vol.7 No.6

본 논문에서는 PC모듈 기반으로 LED(Light Emitting Diode)의 White조명을 이용한 VLC(Visible Light Communication) 송 수신기 모듈의 미디어 전송 시스템을 구현하고 전송 기술에 대해 성능 분석을 하기 위한 연구이다. LED가시광통신을 실현시키고자 송신부에는 1~12개의 LED발광소자와 수신부에는 가변 센서를 사용 하고자 한다. LED가시광통신을 하고자 개발이 이루어진 송 수신부의 초기 거리 값은 0~1m이상으로 하고 전체 시스템 전송 속도는 수천 kbps를 가지는 가시광 미디어 전송 시스템을 이루었다. 성능 분석을 위해서, PC 모듈에 LED 및 적외선센서를 구성하여 예측 및 통신 거리에 분석하여 응용 방법과 가능성에 대해서 확인하고자 한다. LED 모듈의 전체적인 효율 증가를 위하여 렌즈 착용시와 미착용시 각 성능을 측정하여 약 20%의 효율이 증가하였음을 알 수 있었다. This paper is implemented media transmission system of VLC transmitter and receiver module using LED of White lighting that is based on PC module and to transmission technology for performance analysis. To realize LED visible light communication receiver is used 1~12 LED light-emitting device and transmitter is used a variable sensor. Developed initial distance of the tranceiver is more than 0~1m for LED VLC and the overall system transmission speed is achieved on variable having Visible light media transmission system. Composition to PC module with LED module and infrared sensor for performance analysis, predict and analyze the communication distance, check about the possibility of application methods. Measure each performance when the lens wearing and not wearing in order to increase the overall efficiency of the LED module, can know that increase efficiency of approximately 20%.

분산 제어 시스템의 개요

장태수,Jang, Tae-Su 한국전기산업진흥회 1993 電氣産業 Vol.4 No.3

건축법해설(1)

장태수,Jang, Tae-Su 대한건축사협회 1973 建築士 Vol.1973 No.3

건축법해설(2)

장태수,Jang, Tae-Su 대한건축사협회 1973 建築士 Vol.1973 No.4

LCA 분석을 통한 TBM 공법과 NATM 공법의 탄소배출량 비교 연구

장태수 ( Tae-su Jang ),고재순 ( Jae-soon Khau ),송진혁 ( Jin-hyuk Song ),황남순 ( Nam-sun Hwang ) 대한화약발파공학회 2023 화약발파 Vol.41 No.4

터널의 대표적인 굴착방식인 TBM 공법과 NATM 공법의 지구온난화 영향도를 비교하기 위해 각 방식에 대한 전과정평가 (Life Cycle Assessment)를 수행하였다. 전과정평가는 제품 제조 전 단계, 제품 제조 단계, 사용 단계, 폐기단계를 고려하여 탄소배출량의 합산으로 비교해야 마땅하나, TBM (Tunnel Boring Machine)의 제조 및 폐기 데이터에 대한 접근이 제한되어 사용단계에 초점을 맞추어 분석할 수 밖에 없었다. 일반적으로 제품 제조 전 단계 및 제품 제조 단계에서 배출되는 탄소 배출량이 제품수명주기의 전과정에서 배출되는 탄소배출량의 90%를 넘는 경우가 대부분이다. 따라서 사용 단계의 비교만으로는 분석 목표를 달성하기 어렵기 때문에 분석 범위를 확장하였고, 제조 데이터에 접근이 가능한 NATM 공법에 대해서는 제품제조 전 단계 및 제품제조 단계를 포함한 과정에 대한 탄소 배출량을 산출하여 비교해 본 결과, TBM 공법은 사용 단계만 고려했음에도 불구하고 전 과정을 고려한 NATM 공법에 비해 탄소배출량이 많게 결과값이 산출되었다. 이러한 결과는 향후 터널 시공설계 시 최근 환경영향분야 중 관심이 집중되고 있는 기후 변화 (지구온난화)의 영향도를 고려할 때 NATM 공법이 상대적으로 친환경적이라 볼 수 있을 것이다. To compare the global warming impact of the TBM and NATM method, which are representative tunnel excavation methods, a life cycle assessment was performed for each method. Life cycle assessment should compare the sum of carbon emissions by considering the pre-manufacturing stage, product manufacturing stage, usage stage, and disposal stage. However, access to TBM (Tunnel Boring Machine) manufacturing and disposal data is limited, so I had no choice but to focus on the analysis for the usage stage. In general, carbon emissions during the pre-product manufacturing stage and product manufacturing stage often exceed 90% of carbon emissions throughout the entire process. Therefore, since it is difficult to achieve the analysis goal only by comparing the usage stage, the analysis scope was expanded, and carbon emissions for the process were calculated for the NATM method with access to manufacturing data. As a result of comparing the relative impact on global warming, the carbon emissions of the TBM method were found to be higher than those of the NATM method even though TBM method was only considered for the usage stage. So there it is, the NATM method can be seen as environmentally friendly in the future when considering the impact of climate change (global warming), which has recently attracted attention among environmental impact fields.

실리콘 이온주입 SiO₂층의 나노결정으로 부터의 광루미네센스

김광희,오항석,장태수,권영규,이용현,Kim, Kwang-Hee,Oh, Hang-Seok,Jang, Tae-Su,Kwon, Young-Kyu,Lee, Yong-Hyun 한국센서학회 2002 센서학회지 Vol.11 No.3

실리콘 기판 위에 형성한 열산화막에 실리콘이온을 주입하고 열처리를 수행한 후, 광루미네센스(photoluminescence:PL) 스펙트럼을 조사하였다. 실리콘 이온도즈의 변화와 열처리 온도의 변화에 따른 PL스펙트럼을 조사하고, 이를 TEM과 XRD 데이터와 비교하여 분석한 결과, 광루미네센스 특성은 산화막내의 실리콘 나노결정으로부터 기인함을 알 수 있었다. 또 산화막을 1분 간격으로 습식 식각하면서 매 식각 시마다 PL스펙트럼을 관측하여 그 변화를 조사하였다. 이러한 실험을 통하여 산화막내에 분포하고 있는 실리콘 나노결정의 크기와 그 수가 PL피크 파장과 강도에 직접적으로 영향을 줌을 알 수 있었다. Photoluminescence(PL) properties of $Si^+$-implanted $SiO_2$ film, which was thermally grown on c-Si substrate, is reported. We have compared room temperature photoluminescence (PL) spectra of the samples which was made in several kinds of implantation, subsequent annealing and $SiO_2$ film thickness. XRD data was correlated with the PL spectra. Silicon nanocrystals in $SiO_2$ film is considered as the origin of the photoluminescence. PL spectra was investigated after wet etching of the $SiO_2$ film by using BOE (Buffered Oxide Etchant) at every one minute. PL peak wavelength was varied as the etching is proceeded. These results indicate that the quantity and the distribution of dominant size of Si nanocrystals in $SiO_2$ film seem to have a direct effect on PL spectrum.

피부염의 원인균인 황색포도상구균 내성 균주(MRSA)에 대한 에센셜 오일의 항균 효과

최재은 ( Jae-eun Choi ),장태수 ( Tae-su Jang ),김재경 ( Jae-kyung Kim ) 한국미용학회 2022 한국미용학회지 Vol.28 No.5

The emergence of multidrug-resistant microorganisms represents a global challenge owing to the lack of new effective antimicrobial agents. Essential oils could be an alternative to antibiotics because of their anti-inflammatory, antiviral, antibacterial, and antibiofilm activities. Therefore, this study aimed to investigate the antibacterial activity of essential oils as an alternative to antibiotics. In the present study, we cultured methicillin-resistant Staphylococcus aureus (MRSA) with two concentrations (0.5% and 1.0%) of 17 types of essential oils and the antibiotic oxacillin as the control. The optical density of the culture suspensions at 600 nm was determined to assess the effect of the essential oils on MRSA. At 0.5% concentration, 8 essential oils demonstrated higher antibacterial activity than oxacillin, with palmarosa, melissa true, and rose geranium showing the highest antibacterial activity. At 1% concentration, 13 essential oils showed higher antibacterial activity than oxacillin, with melissa true, palmarosa, lemongrass, and rosemary verbenone showing the highest antibacterial activity. Furthermore, essential oils isolated from leaves showed higher antibacterial ability. Overall, the antibacterial activity of essential oils against MRSA varied with the concentration, type, and extraction site. Therefore, our study provides a basis for the selection and use of essential oils for antibacterial activity against MRSA.

연구논문 : 20대 여성의 메디컬스파테라피에 대한 인식연구

김도현 ( Do Hyeon Kim ),장태수 ( Tae Su Jang ) 한국미용학회 2015 한국미용학회지 Vol.21 No.1

This study is to compare and analyze the factors that affect the consumer``s preference and recognition of Medical Spa Therapy about women in their twenties, and to present basic data about marketing program of medical spa industry. The questionnaire survey target is women in their twenties who live in Seoul metropolitan area and Daejon city, and 250 valid responds are analyzed for this study. The results of this study are as follows. 1. It is necessary for medical spa industry to promote anti-aging program and wellness program rather than to serve merely skin care for young female consumers. Marketing program developments are needed for devoting consumer’s general health management through medical spa therapy. 2. Marketing strategies for more specialized programs like facial treatment, skin care and body care program are deeded. 3. As sales strategies, beyond advertising promotion with social commerce, internet system, it is necessary to offer correct and detailed information about the medical spa therapy, specialized programs and expected effects. The result of this study will be basic data to prepare marketing program for medical spa industry and to contribute in this field.

칸디다 알비칸스에 대한 19가지 에센셜 오일과 플루코나졸의 항진균 활성 평가

최재은 ( Jae-eun Choi ),장태수 ( Tae-su Jang ),김재경 ( Jae-kyung Kim ) 한국미용학회 2022 한국미용학회지 Vol.28 No.5

Although many plants have been investigated for their antifungal activity against candidiasis, more treatment options remain needed. This study evaluated the antifungal activity of 19 essential oils against Candida albicans. Nineteen essential oils, at concentrations of 1% and 0.5%, were added to cultures of C. albicans and incubated at 37℃ for 18 h. The optical density was measured at 600 nm. The antifungal activity of the essential oils against C. albicans was dependent on concentration and the extraction site. At 0.5%, essential oils from thyme, palmarosa, and lemongrass displayed higher antifungal activities than fluconazole, suggesting that they are effective against C. albicans. The essential oils of eucalyptus, rosewood, and lavender showed the highest activity at 1% concentration and may be used as antibiotics individually. In addition, the essential oils extracted from leaves, such as thyme, were found to have higher antifungal activity than those from other sites.

최대근력 저항운동과 근지구력 저항운동시 총운동량;혈액점도 및 적혈구용적률의 변화

정환종(Hwan-Jong Jeong),장태수(Tae-Su Jang),김기홍(Ki-Hong Kim) 한국응용과학기술학회 (구.한국유화학회) 2021 한국응용과학기술학회지 Vol.38 No.1

이 연구는 최대근력형과 근지구력형 저항운동이 총운동량과 혈액점도 및 적혈구용적률에 미치는 영향을 조사하고자 하였다. 연구대상자는 저항운동 경력 12개월 이상의 20대 남성 15명으로 선정하였으며;실험 전 벤치프레스 1RM을 측정하였으며;조건 별 실험은 1주일간의 간격을 두고 교차배분하여 6세트 씩 최대반복수행 하였다. 그 결과 총운동량은 근지구력강도가 최대근력강도에 비해 높게 나타났으며 (p<.001);혈액점도와 적혈구용적률은 총운동량에 관계없이 운동 전보다 운동 후에 높아졌다(p<.01). 종합하면 혈액점도는 운동강도와 운동량에 영향을 받지 않으며;일회성 저항운동으로 증가한다는 것을 알 수 있었다. 이는 저항운동 프로그램을 구성하는데 있어 임상적으로 의의가 있으며 혈관질환에 관련된 임상환자들의 운동프로그램을 작성하는데 있어 참고자료가 될 수 있을 것으로 판단된다. The purpose of this study was to investigate the effects of maximum and endurance resistance exercises on total work;blood viscosity;and erythrocyte volume ratio. The study subjects were selected as 15 men in their twenties with 12 months or more of resistance exercise experience;and the bench press 1RM was measured before the experiment;and the experiment for each condition was cross-allocated at intervals of one week;and the maximum repetition was performed in 6 sets. As a result;the total amount of exercise showed that the muscular endurance strength was higher than that of the maximum muscular strength (p<.001);and the blood viscosity and erythrocyte volume ratio were higher after exercise than before (p<.01) regardless of the total exercise amount. In summary;it was found that blood viscosity was not affected by exercise intensity and amount of exercise;and increased with one-time resistance exercise. This is clinically significant in constructing a resistance exercise program;and it is considered to be a reference material in creating an exercise program for clinical patients related to vascular disease.