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에너지 효율적인 저 지연 데이터 수집을 위한 하이브리드 WSN MAC 프로토콜
민지연(Ji-yeon Min),정상화(Sang-hwa Chung) 한국정보과학회 2014 정보과학회논문지 : 정보통신 Vol.41 No.1
B-MAC+은 목적지 노드 주소와 프리앰블 패킷 번호만을 포함하는 짧은 프리앰블 패킷을 통해 수신 노드의 프리앰블 오버히어링에 따른 에너지 소모를 최소화하고자 하였지만 고정적인 프리앰블 오버헤드는 송신 노드의 에너지 소모와 통신 시간을 증가시킨다. XY-MAC은 이를 해결하기 위해 Early ACK 기법을 제시하였으나 Early ACK 구간의 삽입은 수신 노드의 아이들 리스닝 구간을 증가시키는 문제점이 있다. 이와 같이 단일 MAC 프로토콜로는 에너지 효율성과 지연 시간의 두 성능을 모두 만족하지 못한다. 하이브리드 MAC 프로토콜은 데이터 수집 트리에서 다운 링크 트래픽과 업 링크 트래픽에 각각 B-MAC+과 XY-MAC을 적용하여 에너지 효율은 증가시키면서 데이터 수집 시간은 감소시킬 수 있도록 하였다. 실험 결과 생존 시간은 기존 B-MAC+과 XY-MAC의 단일 MAC에 비해 각각 14%, 26% 증가되었고 데이터 수집 시간은 단일 B-MAC+에 비해 21% 감소되었다. This paper proposes a new Hybrid MAC protocol which provides high energy efficiency and low latency for data collection in wireless sensor network. B-MAC+ uses a short preamble packet which contains only destination address and countdown number to reduce energy consumption of receiver node due to preamble overhearing. But the static preamble overhead of B-MAC+ generates unnecessary energy consumption of sender node and communication latency. To solve these problems, XY-MAC uses Early ACK, however, this Early ACK increases the idle listening duration of receiver node. Likewise, with using only one MAC such as B-MAC+ or XY-MAC, it is hard to obtain two performances, energy efficiency and low latency which are mutually exclusive. Hybrid MAC protocol suggests that node spreads data request packet using B-MAC+ and delivers data response packet using XY-MAC to increase energy efficiency and decrease data collection time. The experiment result shows that our proposed protocol leads to improvement in terms of network life time 14%, 26% compared with the B-MAC+, XY-MAC respectively and data collection time 21% compared with the B-MAC+.
파킨슨병, 파킨슨 의증 환자 2례에서 추나치료에 대한 증례보고
김창연,민지연,최영규,고영탁,정영훈,김태수,Kim, Chang-Yeon,Min, Ji-Yeon,Choi, Young-Gui,Koh, Young-Tak,Jung, Young-Hoon,Cho, In-Hee,Kim, Tae-Soo 척추신경추나의학회 2005 대한추나의학회지 Vol.6 No.1
Object : To discuss the Use of Chuna treatment in managing two patients with Parkinson's disease and/or Parkinson' syndrome Methods : This clinical study was carried out of 2 cases with confirmed by certified neurologist Parkinson's disease and/or Parkinson' syndrome. One case had been admitted from 2004.09.16 to 2004.09.24 and treated from 2004.09.26 to 2004.10.15 and the other case had been admitted from 2004.10.21 to 2004.11.06 and treated from 2004.11.08 to 2004.11.15 in the department of acupuncture and moxibustion of Ha-na oriental medical center. Results : There was significant improvement in condition of the two patients treated by Chuna treatment(upper cervical to promote CSF circulation) on Parkinson's disease or Parkinson' syndrome. Conclusion: In the case, we treated two patients of Parkinson's disease and/or Parkinson' syndrome. Chuna treatment efficiently relieved the symptoms including tremor and bradykinesia.
황지언,유초시,신요안 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.2
초고해상도 기법은 저해상도 영상을 고해상도 영상으로 해상도를 향상하는 기법이다. 본 논문에서는 딥러닝 모델 중 CNN (Convolutional Neural Network) 기반의 DBPN (Deep Back-Projection Network)을 이용하여 위성 영상의 해상도를 향상하는 기법을 제안한다. 업-샘플링 및 다운-샘플링 층을 사용하여 재구성 오류를 반복적으로 계산하여 고해상도 결과를 조정하는 방식으로 각 샘플링 속도가 증가한다. 실험 결과 고전 방식과 비교하여 해상도 향상을 확인하였다.
김태수,김창연,민지연,최영규,강대희,Kim, Tae-Soo,Kim, Chang-Yeon,Min, Ji-Yeun,Choi, Young-Gue,Kang, Dae-Hee 사상체질의학회 2004 사상체질의학회지 Vol.16 No.3
1. Objectives The Purpose of this study was to evaluate whether use of Sasang -Bang with western medication may injury the liver and the kidney function. We clinically studied the change Liver function test and BUN/Cr in patients who were hospitalized in Hana oriental Medical center for more than 1 month. 2. Methods The subjects were 33 patients admitted in Hana Oriental Medical center. All patients had been checked Liver Function Test and BUN/Cr three times every 2 weeks. 3. Results Aspartate Aminotransferase(AST), Alanine Aminotransferase(ALT), Gamma-Glutamyl transferase(GGT), Total billirubin, BUN, Creatine didn't change, compared with previous 2 weeks and 4 weeks. 4. Conclusions This study suggests that even though there are few toxic Sasang-Bang, in general, herbal medications with western medications which are prescribed by oriental medicine doctors should be carefully administered not to hurt liver and kidney function.
최서형,심민,김태수,민지연,최영규,Choi, Seo-Hyoung,Sim, Min,Kim, Tae-Soo,Min, Ji-Yeon,Choi, Young-Gyoo 대한한방내과학회 2005 大韓韓方內科學會誌 Vol.26 No.4
Objective : Liver cirrhosis is a disease of the liver in which normal cells are replated by scar tissue. Chronic liver disease and liver cirrhosis are the foutth ranked causes of death in Korea. However, clinical data on liver cirrhosis is not accumulated in oriental medicine. Therefore, clinical characteristics of 33 liver patients admitted to Hana Oriental Hospital from May 2004 to May 2005 were studied. Methods : Clinical characteristics of liver cirrhosis, such sex, age, causes, Child-Pugh class, chief complain, abdomen ultrasonography, disease duration, past history, blood test and urinalysis were reviewed. Results : The results of this study were as follows: 1 The distribution of sex and age in our study is similar to already reported statistics. 2. Hepatitis B and alcohol are the major factors to cause the liver cirrhosis. Diabetes and hypertention contribute more to cause than they have in previous histories. 3. Major symptoms are following: fatigue 87.9%, ascites 84.8%, jaundice 78.8%, leg edema 72.7%, dyspepsia 45.5%. 4. Most liver cirrhosis patients have pancytopenia. Standard Deviation accentuates the big differences between total bilirubin and serum amonia. 5. In urinalysis, Urobilinogen 19 patients (57.6%), bilirubin 12 patients (36.4%), blood 15 patients (45.5%) are positive. 11 cases of 15 in blood positive results scored $3{\sim}4+$. Contusions : In oriental medicine, it will be necessary to research and develop oriental medical therapies for liver disease including liver cirrhosis.
초등학생의 내,외재적 동기 및 창의성과 심리적 안녕감 간의 경로모형 비교 검증
이미나 ( Mi Na Lee ),민지연 ( Ji Yeon Min ) 한국초등교육학회 2013 초등교육연구 Vol.26 No.3
본 연구는 초등학생의 내·외재적 동기 및 창의성과 심리적 안녕감 간에 어떠한 관련성이 있는지를 알아보는 데 그 목적이 있다. 본 연구를 위해 서울 소재 초등학교에 재학 중인 5, 6학년 146명(남:69, 여:77)을 대상으로 창의성검사(CIS), 한국 청소년 안녕감 척도(K-WBSA), 내·외재적 동기 척도를 측정하였다. 수집된 자료는 Cronbach의 알파계수, Pearson의 적률상관분석, 경로 모형을 통해 분석되었다. 연구결과는 다음과 같다. 첫째, 내·외재적 동기, 창의성 및 안녕감 세 변인 모두 서로 유의한 상관을 보였다. 특히 내재적 동기가 창의성과 안녕감에 더 관련이 높은 것으로 나타났다. 둘째, 연구자가 제시한 제안모형과 경쟁모형의 적합도를 비교한 결과, 제안모형이 더 적합한 것으로 나타났다. 이러한 결과는 내재적 동기가 창의성 및 안녕감 모두에 유의한 영향을 미치는 핵심변인임을 확인함과 동시에, 안녕감을 추구하는 데 있어 창의적인 과정을 통해 발생된 즐거움이나 긍정적 정서가 중요함을 시사한다. The purpose of this study was to identify the path relationship among intrinsic/extrinsic motivation, creativity, and psychological well-being. In this study, total of 146 students from two elementary school in Seoul were asked to respond to surveys on CIS(Creativity Inventory of Young Students), K-WBSA(Korea Well-Being Scale of Adolescent), and Intrinsic·Extrinsic Motivation Scale. Data was analyzed by cronbach`s alpha, pearson correlation, and path model. The results of this study were showed as follows. First, with the analysis of the correlation, there were positive correlations among intrinsic/extrinsic motivation, creativity, and psychological well-being. Especially intrinsic motivation was more related to creativity and psychological well-being. Second, the research model was acceptable for its goodness of fit, but the comparative model didn`t show goodness of fit. These findings support the notion that, intrinsic motivation is the key factor to effect creativity and psychological well-being. And pleasure or positive emotions generated through the creative process is important to pursue elementary school students` psychological well-being.