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Network Coding Performance Analysis with Multicast Topology
이미성(Mi Sung Lee),발라카난(Balakannan S.P),이문호(Moon Ho Lee) 大韓電子工學會 2010 電子工學會論文誌-TC (Telecommunications) Vol.47 No.11
네트워크 코딩은 실용 네트워크 시스템에서 흥미로운 적용을 보이며 새로운 연구 분야로 인식되고 있다. 네트워크 코딩에서, 중간 노드는 이전에 받은 정보의 선형조합 되어진 패킷을 보낼 수 있다. 수식적으로 이론 및 운영 네트워크는 네트워크 노드들에서 코딩을 고려하는 새로운 관점으로부터 발표되었다. 우리는 다중원천 다중전송 네트워크에서 최적의 채널용량에 점근적으로 달성하는 네트워크 코딩을 제시한다. 우리의 해석방법은 네트워크 코딩 사이에 만든 Connection들을 사용한다. 이 논문에서 우리는 네트워크 코딩의 성능에 대해 해석했다. 또한 우리는 선형 최적화 문제를 가진 네트워크 코딩에 대한 시뮬레이션 결과를 논하고, 어떻게 네트워크 코딩을 사용 할 수 있는지를 보인다. Network coding is a new research area that may have interesting applications in practical networking systems. With network coding, intermediate nodes may send out packets that are linear combinations of previously received information. The exploration of numerical, theoretical and operational networking issues from new perspectives that consider coding at network nodes. We have presented a network coding approach which asymptotically achieves optimal capacity in multi-source multicast networks. Our analysis uses connections that we make between network coding. In this paper we analysed with and without network coding performance. Also we discussed the simulation results on network coding with linear optimization problem and it shows how network coding can be used.
이미성(Mi Sung Lee),이문호(Moon Ho Lee),박주용(Ju Yong Park) 大韓電子工學會 2010 電子工學會論文誌-TC (Telecommunications) Vol.47 No.7
본 논문에서는 GF(2)에서의 두 생성다항식에 의해 생성된 M-sequence로 Gold-Sequence를 생성한 후, Permutation을 해줌으로써 Hadamard 행렬의 특성을 가지게 됨을 살펴보았다. M-sequence는 선형 귀환 천이 레지스터 부호 생성기(Linear feedback shift register code generator)에 의해 생성되었으며, 두 개의 M-sequence에 의해 생성된 Gold-sequence의 첫 열에 8×1의 영행렬을 추가하고 Permutation을 시켜줌으로써 Hadamard 행렬의 주요 성질인 직교성(Orthogonal)과 한 행렬과 이 행렬의 Transpose시킨 행렬의 결과가 단위행렬이 되고, 역행렬은 element-wise Inverse가 되며, 고속 Jacket행렬의 성질을 만족한다. 또한 선형 귀환 축차 생성기를 통하여 생성된 M-sequence의 1행과 1열을 추가함으로써 위에서 언급한 Hadamard 행렬의 주요 성질을 만족하고 L-matrix 와 S-matrix 를 통하여 고속변환이 가능함을 보인다. In this paper we generate Gold-sequence by using M-sequence which is made by two primitive polynomial of GF(2). Generally M-sequence is generated by linear feedback shift register code generator. Here we show that this matrix of appropriate permutation has Hadamard matrix property. This matrix proves that Gold-sequence through two M-sequence and additive matrix of one column has one of major properties of Hadamard matrix, orthogonal. and this matrix show another property that multiplication with one matrix and transpose matrix of this matrix have the result of unit matrix. Also M-sequence which is made by linear feedback shift register gets Hadamard matrix property mentioned above by adding matrices of one column and one row. And high-speed conversion is possible through L-matrix and the S-matrix.
Quasi-Cyclic Low-Density Parity-Check Codes with Large Girth Based on Euclidean Geometries
이미성(Mi Sung Lee),지앙쉐에친(Xueqin Jiang),이문호(Moon Ho Lee) 大韓電子工學會 2010 電子工學會論文誌-TC (Telecommunications) Vol.47 No.11
이 논문은 유클리드 기하학과 Circulant Permutation Matrices에서 병렬 구성을 기반으로 하는 Quasi-cyclic Low-density parity-check (QC-LDPC) 코드의 생성을 위한 하이브리드한 접근방식을 나타낸다. 이 방법으로 생성된 코드는 넓은 둘레(Large Girth)와 저밀도(Low Density)를 가진 규칙적인 코드로 나타내어진다. 시뮬레이션 결과는 이 코드들이 반복 복호(Iterative Decoding)를 통해 좋은 성능을 갖는것과 부호화되지 않은 시스템에서 좋은 코딩 이득을 달성하는 것을 보인다. This paper presents a hybrid approach to the construction of quasi-cyclic (QC) low-density parity-check (LDPC) codes based on parallel bundles in Euclidean geometries and circulant permutation matrices. Codes constructed by this method are shown to be regular with large girth and low density. Simulation results show that these codes perform very well with iterative decoding and achieve reasonably large coding gains over uncoded system.
이미성 ( Mi Sung Lee ),김소라 ( So Ra Kim ) 한국패션비즈니스학회 2015 패션 비즈니스 Vol.19 No.1
This study aimed to develop basic pants patterns reflecting somatotype characteristics of the women in their 20s. In order to develop basic pants patterns for women in their 20s, wearing tests were conducted. With the results of wearing tests, drafting methods were applied by using regression equation for the parts that were found to improper. For the parts where regression equation was not applicable, the results of wearing tests were applied. The results and the conclusion of development of basic pants patterns for women in their 20s were as follows. The waist height was applied for the regression equations of waist to hip length, crotch length, and knee length, and the hip circumference was applied for the regression equations of front leg opening. Also, back leg opening, front knee width and back knee width were calculated based on the front leg opening. For the waistline the ease of 2cm was added, and for the hipline the ease of 4cm was added. H/16 1cm . was applied for the drafting of front crotch width, and H/8 was applied for the drafting of back crotch width. Pants patterns for women in their 20s on the methods mentioned above were tested for the 2nd research wearing tests, and they received good ratings on the items and demonstrated that the developed pants patterns had excellent body fit.
직업군인 아버지의 양육태도가 유아 공감능력에 미치는 영향 : - 경기도 군 직장 어린이집 유아 대상 -
이미성(Lee Mi-Seong),조성심(Cho Sung-Sim) 한국유아교육·보육복지학회 2020 유아교육·보육복지연구 Vol.24 No.4
본 연구는 직업군인 아버지의 양육태도와 유아 공감능력에 미치는 영향을 살펴봄으로써 군 직장 어린이집에서 유아 공감능력을 발달시키는데 필요한 부모교육과 상담에 활용할 수 있는 기초자료를 제공하고, 이를 지원하기 위한 군 가족 복지제도는 무엇인지를 모색하는 데 목적이 있다. 이를 위해 경기도 소재 군부대 어린이집 직업군인 아버지 250명을 대상으로 설문 조사하였다. 연구결과, 첫째, 직업군인아버지의 일반적 배경 변인 중 병과와 계급에 따른 양육태도에서 거부적 태도와 전체 양육태도에서 유의한 차이가 있는 것으로 나타났다. 둘째, 직업군인 아버지의 애정적 태도와 유아 공감능력 간의 관계는 유의미한 상관관계가 있는 것으로 나타났다. 셋째, 직업군인 아버지의 양육태도는 유아 공감능력에 영향을 미치는 것으로 나타났는데 공감능력을 발달시키는 결정적인 유아기에 직업군인 아버지의 양육태도는 매우 중요하다는 것을 알 수 있다. 이러한 연구결과를 토대로 실천적 함의와 정책적 제언을 제시하였다. The purpose of this study is to investigate how the parenting attitude of professional fathers living in the 4th industrial revolution era in which the empathy counts influences child s empathy. This study aims to encourage to have proper parenting attitude and recognize importance of parents role when the soldier fathers with their children perform their roles, especially as their children has developed empathy. In addition, it aims to provide basic data that childcare centers in the military camp make use of for parent education and counseling. For this purpose, a survey was conducted on 250 professional fathers who were occupational nurseries of military units in the Gyeonggi-do. First, among general background variables of professional fathers, there were significant differences in the attitudes of parenting according to the class and class in the attitude of rejection and overall parenting attitude. Second, there was a significant correlation between the affectional attitudes of professional fathers and the empathy of infants. Third, the rearing attitude of professional fathers of the occupational group was found to affect the infant empathy ability. Third, the professional father s parenting attitude influenced the infants empathy ability, and it can be seen that the professional father s parenting attitude of the occupational group is very important in early childhood. Based on these findings, practical implications and policy suggestions were presented.
표면 근전도 센서 기반 Ptosis 진단 시스템 및 알고리즘 개발
권미성(Mi Sung Kwon),이종하(Jong-Ha Lee),손대구(Dae Gu Son),김아람(A Ram Kim) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.6
If the lifting power of eyelid from the levator palpebrae muscle becomes weak, eyelid is drooped and the edge of eyelid cannot be lifted on normal level. This phenomenon is called the ‘Ptosis’. If the person has the ptosis, they use the forehead muscle when the eyes open. In this research, the frontalis EMG was measured for the gaze angle. People with the ptosis was confirmed for the use frontalis muscle more than normal people. Therefore, we propose a system to quantify the presence the ptosis as EMG levels of frontalis muscle.
태권도 품새 선수의 자기관리와 지도자신뢰, 심판판정공정성, 경쟁상태 불안 및 인지된 경기력과의 관계
이현정(Lee, Hyun-Jeong),홍미성(Hong, Mi-Sung) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.5
The purpose of this study was to investigate correlation among Taekwondo Poomsae athletes’ self-control, their trust in instructor, fairness of referees decision, competition anxiety and perceived athletic performance. For the purpose of this study, 299 Poomsae athletes were selected. Survey questionnaires was used as research tool. With the collected data, exploratory factor analysis, confirmatory factor analysis, correlation analysis and structure model analysis were performed through SPSS 18.0 and AMOS 21.0. The results of analysis were summarized as follows. First, Taekwondo Poomsae athletes’ self-control had an influence on trust in instructor. Second, their self-control had an influence on perception of fairness of referees decision. Third, their trust in instructor had an influence on perception of fairness of referees decision. Fourth, their trust in instructor had an influence on competition anxiety. Fifth, their competition anxiety had an influence on self-control. Sixth, their perception of fairness of referees decision didn’t have an influence on competition anxiety. Seventh, their trust in instructor didn’t have an influence on perceived athletic performance. Eighth, their perception of fairness of referees decision didn’t have an influence on perceived athletic performance. Ninth, their competition anxiety didn’t have an influence on perceived athletic performance. Tenth, their self-control had an influence on perceived athletic performance.