Multi-Code CDMA 시스템에서의 비선형 전력 증폭기의 영향분석

권진만,김상우 한국통신학회 1999 韓國通信學會論文誌 Vol.24 No.6

최근 들어 다양한 종류의 정보를 원하는 속도와 서비스품질(QOS)로 전송하고자 하는 Multi-Rate CDMA 시스템들에 대한 연구가 활발하다. 본 연구에서는 다양한 종류의 정보를 보내는데 있어서 쉽게 기존의 CDMA 시스템과 융화 될 수 있으며, 사용자가 요구하는 QOS와 전송 속도를 만족시킬 수 있는 Multi-Code CDMA 시스템에서 주요한 요소로 고려되고 있는 전력 증폭기의 비선형성을 고려하여 Multi-Code CDMA 시스템의 성능을 분석하였다. 분석에 사용한 비선형 증폭기의 모델링에는 다항식을 사용하였으며, 분석 결과 특히 주파수 선택적 페이딩의 경우 비선형에 의한 영향이 AWGN 채널에 비하여 훨씬 더 큼을 알 수 있었다. Recently a number of multi-rate CDMA systems have been proposed for the third generation mobile communication system. Multi-Code CDMA (MC-CDMA) offers the system construction advantage of being able to use a single-rate receiver. But MC-CDMA suffers from the distortion due to the nonlinearity of the power amplifier. In this paper, we analyze the effect of the nonlinearity on the bit error rate performance of MC-CDMA systems. A polynomial model is used to represent the amplifier amplitude nonlinearities.

길쌈부호화된 DS / SSMA 통신시스템에서의 Error-and-Erasure 복호화 ( Error-and-Erasure Decoding for Convolutional Coded DS / SSMA Communication System )

권진만,김상우 한국통신학회 1995 한국통신학회 학술대회논문집 Vol.- No.-

Two new records of the Tribe Phaeogenini Förster (Hymenoptera: Ichneumonidae: Ichneumoninae) from Korea

권진만,정종철,차진열,이종욱 한국곤충학회 2012 Entomological Research Vol.42 No.3

We report two species that are new to Korea, Misetus borealis Kusigemati and Phaeogenes sapporensis Uchida. A key to Korean species of Phaeogenini, redescriptions and photographs of diagnostic characters are provided.

The Prognostic Impact of the Number of Metastatic Lymph Nodes and a New Prognostic Scoring System for Recurrence in Early-Stage Cervical Cancer with High Risk Factors: A Multicenter Cohort Study (KROG 15-04)

권진이,엄근용,김영석,박원,전미선,이지혜,김용배,윤원섭,김진희,최진화,장세경,정배권,이석호,차지혜 대한암학회 2018 Cancer Research and Treatment Vol.50 No.3

Purpose We aimed to assess prognostic value of metastatic pelvic lymph node (mPLN) in early-stage cervical cancer treated with radical surgery followed by postoperative chemoradiotherapy. Also, we sought to define a high-risk group using prognosticators for recurrence. Materials and Methods A multicenter retrospective study was conducted using the data from 13 Korean institutions from 2000 to 2010. A total of 249 IB-IIA patients with high-risk factors were included. We evaluated distant metastasis-free survival (DMFS) and disease-free survival (DFS) in relation to clinicopathologic factors including pN stage, number of mPLN, lymph node (LN) ratio (number of positive LN/number of harvested LN), and log odds of mPLNs (log(number of positive LN+0.5/number of negative LN+0.5)). Results In univariate analysis, histology (squamous cell carcinoma [SqCC] vs. others), lymphovascular invasion (LVI), number of mPLNs ( 3 vs. > 3), LN ratio ( 17% vs. > 17%), and log odds of mPLNs ( 0.58 vs. > 0.58) were significant prognosticators for DMFS and DFS. Resection margin involvement only affected DFS. No significant survival difference was observed between pN0 patients and patients with 1-3 mPLNs. Multivariate analysis revealed that mPLN > 3, LVI, and non-SqCC were unfavorable index for both DMFS (p < 0.001, p=0.020, and p=0.031, respectively) and DFS (p < 0.001, p=0.017, and p=0.001, respectively). A scoring system using these three factors predicts risk of recurrence with relatively high concordance index (DMFS, 0.69; DFS, 0.71). Conclusion mPLN > 3 in early-stage cervical cancer affects DMFS and DFS. A scoring system using mPLNs > 3, LVI, and non-SqCC could stratify risk groups of recurrence in surgically resected early-stage cervix cancer with high-risk factors.

Synthesis and Characterization of Cardanol-based Surfactant and its Application as Cathode Coating Material for Lithium-Sulfur Batteries

권진,정다운,이종찬 한국고분자학회 2023 한국고분자학회 학술대회 연구논문 초록집 Vol.48 No.1

효소의 전처리와 후처리에 의한 섬유특성 및 sheet의 물리적 성질 변화 비교

권진,강경남,조병묵 한국공업화학회 2002 한국공업화학회 연구논문 초록집 Vol.2002 No.0

효소는 활성화 에너지를 저하시킴으로서 화학 반응속도를 높이는 즉, 생화학적 촉매로서 사용되고 있다. 특히 전세계적으로 환경규제가 강화됨에 따라 환경 친화적인 효소의 산업적용기술은 주목받고 있다. 이미 제지분야에서의 효소적용연구는 많은 분야에서 진행되고 있다. ; 효소를 이용한 탈묵 기술, 효소를 이용한 탈수촉진,그리고 효소를 이용한 에너지 절약에 대한 연구는 많은 연구자들에 의해서 진행되었다. 효소 처리를 기계적인 처리인 beating과 조합하여 beating전에 효소를 처리하는 전처리 방법과 beating후에 효소를 처리하는 후처리 방법을 각각 실시하여 섬유특성과 sheet의 물리적 성질을 비교한 본 연구는 섬유특성의 변화를 비교하기 위한 여수도, 탈수속도. WRV를 측정하였고 물리적 성질의 변화를 비교하기 위해 인장강도, 인열강도, 겉보기 일도를 측정하였다. 여수도는 후처리 과정을 통하여 증가되었고 탈수속도는 후처리 과정을 통하여 개선되었다. WRV는 전처리 과정을 통하여 증가하는 경향을 나타냈다. 인장강도는 전처리 과정을 통하여 개선됐고 인장강도는 효소처리에 의해 감소하였고 후처리가 더욱 큰 감소폭을 보였다. 겉보기 밀도는 후처리 과정을 통하여 감소하는 결과를 얻을 수 있었다.

청키-스타일 니트웨어의 미적 특성에 관한 연구

권진,우현리 한국니트디자인학회 2020 패션과 니트 Vol.18 No.3

Clothing expressed with volume and fullness appears in both woven wear and knit wear. Especially, a volume of softer and massier silhouette can be found in knit wear than woven wear. Such a bulky style unique in knitwear with soft lines can be referred to as chunky style knitwear. At present, chunky style knitwear faces development into various kinds of design. And yet, its specific study is very insufficient. Considering this, more detailed examination about chunky style in knit wear is needed. Therefore, this study aims at development of knitwear design by analyzing the chunky style based on modern knitwear. This work proceeds to analysis on type of knitwear expression and its aesthetic nature As a results of the study on chunky style knitwear, this study shows that the expression style in it is divided into human body-focused chunky style and human body-distorted chunky style. Aesthetic characteristics in chunky style knitwear give structural solid beauty, deconstructive ornamental beauty, and deconfining changing beauty. This study helped to organize and put forth design theories needed to comprehend the expression types and aesthetic characteristics in chunky style knitwear and also confirm the diversity of knitwear design realm.

심장이식후 면역억제 치료 중 발생한 Listeria Monocytogenes에 의한 뇌막염 1예

권진일,김영준,최경림,최상진,김은아,정원호,손민수,오세진,최인석,신익균 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.9

선진기업복지제도 도입지원사업의 경제적 효과성 분석

권진아(Jin-A Kwon),안영규(Young-Gyu Ahn),김현수(Hyun-Soo Kim),박경일(Kyung-Il Park) 한국콘텐츠학회 2017 한국콘텐츠학회논문지 Vol.17 No.10

본 연구는 자료포락분석(DEA : Data Envelopment Analysis)을 이용하여 선진기업복지제도 실행에 따른 경제적 효과성을 분석하여, 중소기업들이 선진기업복지제도를 적극 도입 시행하도록 기여하는데 그 목적이 있다. 이를 위해, 설문회수 자료 중 투입-산출 지표와 관련된 3가지 유형의 - A유형(기본+심화, 도입)기업 36개, B유형(기본+심화, 미도입)기업 5개, C유형(기본, 미도입)기업 7개 - 총 48개 기업을 표본대상으로 하여 선진기업복지제도 도입과 관련된 경제적 효과성을 측정해 보았다. 분석 결과, 컨설팅을 받은 후 선진기업복지제도 중 어떤 하나의 제도라도 도입한 기업의 경제적 효과성이 컨설팅을 받은 후 관련 제도를 도입하지 않은 기업의 경제적 효과성보다 대체로 높게 나타나, 근로복지공단에서 실시하는 컨설팅을 통해 제도를 도입할 경우 긍정적인 경제적인 효과가 있음을 확인할 수 있었다. 이러한 연구결과를 통해 근로복지공단에서는 컨설팅을 보다 적극적으로 실시할 필요가 있으며 컨설팅만 받고 관련 제도 도입을 망설이는 기업을 찾아내고 그 이유에 대하여 구체적으로 파악해 볼 필요가 있음을 시사하고 있다. The purpose of this study is to analyze the economic effectiveness of advanced enterprise welfare system utilizing DEA(Data Envelopment Analysis) and contribute to the adoption and implementation of the system conducted by Korea Workers’ Compensation & Welfare Service(COMWEL). We classified 48 sample data into 3 categories : A category(basic consulting & intensive consulting, adoption) is 36, B category(basic consulting & intensive consulting, non-adoption) is 5, and C category(only basic consulting, adoption) is 7. A consulting fee is used as input variable, earning per employee and average employee tenure are used as output variables. As a result from DEA, we find out the fact that the economic effectiveness of A category is better than the economic effectiveness of B and C category and it comes to the conclusion that the consulting service provided by COMWEL has a positive effect on the adoption and implementation of advanced enterprise welfare system. Therefore, COMWEL is required to perform consulting service to small & medium business more actively and is needed to look at the reason why some businesses hesitate to accept the relevant system.

비대칭 얼굴에 따른 교정메이크업 연구

권진아,박영진 한국인체미용예술학회 2024 한국인체미용예술학회지 Vol.25 No.1

This study attempted to suggest makeup specialists appropriate makeup techniques which can make up for facial asymmetry for those who find it hard to do makeup due to the unbalanced facial features. To unveil differences before and after makeup in 8 testees with facial asymmetry, the photos taken before and after such makeup were compared. Then, the four purposes of this study were achieved: First, the theoretical background of asymmetrical makeup was examined by analyzing the concept of makeup and the current situations, causes and types of facial asymmetry. Second, makeup which can cover facial asymmetry was performed against adult women in their 30s. Third, the effects of the asymmetrical makeup were analyzed by comparing the results before and after the makeup. Fourth, this study reviewed the products and techniques used during the makeup, suggesting practical makeup techniques.