다양한 복호기의 구조를 갖는 터보 부호의 성능 분석

계환원,송홍엽 延世大學校 電波通信共同硏究所 1999 電波通信論文誌 Vol.4 No.1

터보 부호의 복호기는 복호화 알고리즘으로 MAP 알고리즘이나 SOVA 알고리즘을 이용하는 2개의 SISO(soft input soft output)복호기가 직렬 모드로 연결되어져서 반복적으로 정보들을 서로 교환하는 구조이다. 그러나 만약 병렬 모드로 복호기가 구성된다면 직렬 모드에 비해 더 많은 출력 정보를 얻을 수 있는 장점이 있다. 따라서 본 논문은 병렬 모드의 복호기 구조를 변형함으로써 성능의 개선을 얻을 수 있는 방법들을 제안한다. 바로 두 복호기들의 LLR 출력값을 더하는 방법과 두 복호기의 외부 정보의 평균값을 이용하는 방법이며 이렇게 제안한 방법과 일반적인 터보 부호의 성능과 비교, 분석한다. The decoders of turbo codes realized either using MAP algorithm or SOVA algorithm have the structures that two SISO(soft input soft output) decoders are concatenated in serial mode and exchange informations among each other. But if they are connected in parallel mode, more informations than in serial mode can be obtained. So this paper proposes the parallel decoder structures slightly modified in order to achieve performance improvement. The proposed methods are using the LLR outputs of two decoders and using the extrinsic informations of two decoders and compared with the performance of general turbo codes.

신갈나무림 동절기 호흡량의 모의실험에 의한 추정

서계홍 대구대학교 산업기술연구소 1988 産業技術硏究 Vol.7 No.-

The winter respiration in a mongolian oak stand was simulated with the computer program. The amount of CO₂ evolved by the winter respiration of the stand was estimated 43.52 ton CO₂ ha^(-1) and the amount of CO₂ evolved by the Q_(10) method was estimated 54.75 ton CO₂ ha^(-1) which was 25.8% more than the result by this method.

우리나라의 貿易習慣에 따른 保險期間의 適用問題点

李啓烈,朴洪均 여수대학교 1994 論文集 Vol.8 No.-

As the transport has been generalized to multimodel transport from ocean transport with the development of trade, the carrier's liability has been extended to port to port. The cargo insurance must also meet such a requirement of the times. So the introduced clause is Warehouse to Warehouse Clause on I.C.C and it was enacted to clarify the concepts of transportation and final warehouse as the transit clause in 1982. The term insureed is very meaningful to insurer and insured in contract of insurance like perils covered and excluded perils because it dertermines protection by insurance for insured and the risk cover for insurer. The transit clause this study is to investigate is the most important on clauses of ICC and is hard to understand, and has many problems for its interpretation and especially coming into questions are as follows ; First, in ordinary course of transit, what voyage does it belong to the conventional scope ? Second, as the meaning of final warehouse, what is the final warehouse ? Third, which is the intermedite warehouse, stowage of final warehouse for distribution ? Fourth, in the clause that" the insurance shall be expired on 60th days after discharge", how does the basic period of 60th days be calculated? In applying the transit clause of ICC(Institute Cargo Cluses)to the cargoes of transit system, it has primary factor of dispute on its interpretation and may result in a disadvantageous result which can not be anticipated in the position of shipper. This paper examines and reviews the literatures at home and abord related to multimodal transport insurance and investigates clear duration of risk of insurer and rational interpretation based on the historical consideratins and case examination and then to complement it, questionnaire is executed and claim documents of the insurance company are arranged and analyzed.

자외선 조사에 의한 인체 각질형성세포 세포고사 방어인자에 관한 연구

박수홍,박준홍,이종석,황규왕,김계정 순천향의학연구소 1998 Journal of Soonchunhyang Medical Science Vol.4 No.2

Back ground: Human skin is continuously exposed to UV irradiation. Ultraviolet irradiation of human skin cause sunburn cell which is relevant to the apoptosis of keratinocytes. In the epidermis, apoptosis inducing factors and anti-apoptotic factors probably exist to maintain the integrity of keratinocytes. Objective: The purpose of this study was to investigate the exsistence of apoptosis inducing factors and anti-apoptotic defence factors by evaluation of UV induced apoptosis in cultured human keratinocyte and other keratinocyte cell lines(A-431 cells, KB cells) and its susceptibility of UV induced apoptosis in various conditions. Method: In this study, the percentages of apoptosis, necrosis and cell viability of irradiated human keratinocytes and othe keratinocyte cell lines by MMT assay and AO/EO stain. The percentages of those were measured before UVB irradiation and 8, 24, 48 hours after UVB irradiation. Also, the same evaluations were performed with irradiated human keratinocytes cultured without growth factor and with enough growth factors, both results were compared with each other. And the effect of cycloheximide, a protein synthesis inhibitor was evaluated. Also that of aurintricarboxylic acid(ATA), an inhibitor of endonucleases which play an important role in inducing apoptosis of human keratinocytes was evaluated. Result: Human keratinocytes and other keratinocyte cell lines(A-431 cells, KB cells) were cultured in vitro developed maximal apoptosis 48 hours after irradiation, keratinocytes were more resistant to UV induced apoptosis than the others. The withdrawal of growth factors from keratinocyte and addition of cycloheximide decreased the cell survival rate following UV irradiation and increased the induction of apoptosis. And ATA inhibited UV induced apoptosis. Conclusion: These results indicate that human keratinocytes have both anti-apoptotic factors and apoptosis inducing factors to maintain the homeostasis. And survival signals mediated through growth factors or cellular proteins are responsible for the resistance to apoptosis observed in keratinocytes in vitro.

S.C.R을 이용한 D.C전압 조정기

전기석,홍의석 光云大學校 1976 論文集 Vol.5 No.-

In the design of low cost television receivers when a well-regulated D.C. supply is desired, the Cost of the power supply becomes a major expense. This is especially true when D.C Voltages desired are around 100 Volts and Current require ments exceed 5 amperes. An inexpensive line connected system is described blow which uses an S.C.R. in series with the 120 Volts, 60Hz A.C. line. This system is ideally suited to provide about 50 to 120 Volts D.C. at Currents up to about 0.75 amps. This supply will provide high performance at low cost. Its gain and stability can be tailored to the specific application. All the solid-state components are enough to fit on a small module. It can be an inexpensive, efficient power supply system.

신갈나무 개체에서의 이산화탄소 수지모델

서계홍 대구대학교 산업기술연구소 1988 産業技術硏究 Vol.7 No.-

Carbon dioxide balance of an individual mongolian oak was modelled based on the equations from the meteorological data and the relationship between organs and the gas exchange rates. Gross productivity, total respiration, and net productivity of an individual mongolian oak were estimated 13.2, 6.1, and 7.1kg CO₂/month, respectively.

기업의 교육·훈련 투자 실적과 성과요인과의 관련성 연구

박계홍,권혁수 한국중소기업학회 2002 中小企業硏究 Vol.24 No.3

교육·훈련 투자비와 기업성과요인들과의 관련성을 연구하기 위하여 2000년 말 현재 우리나라 제조업 500여개 업체를 대상으로 우편조사를 실시하여 분석이 가능한 49개 업체를 중심으로 분석하였다. 교육·훈련 투자비와 성과요인들과의 관련성에 대한 기존 연구의 검토와 이론정리를 통해 가설을 설정하고, 실증분석을 실시하였다. 교육·훈련 투자비를 종속변수로 한, 비용함수를 추정하여 교육·훈련 투자가 생산성에 어느 정도 영향을 주고 기업의 고용안정성에도 어느 정도 기여하는지 조명하였다. TheAn Empirical study on the relationship of the important factors determining the performance of organization(employment separation rate, average monthly real wage, labour productivity) as they have influenced on the existence, growth and the development of an organization. Therefore, this study was conducted to provide suggestion for a future research by establishing the most important factors determining the success of organization relations among in terms of factors affecting the efficiency of Cost Education Vocational Training they provide centering on the influence caused by such factors. On the basis of this theoretical observation we established models and hypotheses of research. We carried out at the same time positive analysis with a survey by questionnaire in order to verify the research hypotheses(Manufacturing 49 unit). We proceeded to the survey by questionnaire after confirming relevancy of the research model in preliminary examination. We performed statical disposition and analysis of the samples based on this. Before verifying the research hypotheses We conducted analysis of factors to secure the soundness and reliability of measuring tools. Then, We carried out descriptive statistical analysis of the distribution and statistical amount of the variables used in this study. Finally, We utilized such statistical analysis as multiple regression analysis, parameter regression analysis and process analysis.

음식서비스속성에 대한 대학생들의 태도 평가에 의한 패스트푸드점들 간의 차이 분석

민계홍 한국조리과학회 2003 한국식품조리과학회지 Vol.19 No.3

The purpose of this study was to identify university students' attitude to the foodservice attributes in their contribution to the selection of a fast food restaurant. Among 300 subjects, 214 were used in the analysis. The frequencies, Descriptives, ANOVA and t-test were used for the statistical analyses in this study. The findings from this study were as follows: firstly, there were no significant differences in the importance (or salience) of the foodservice attributes between the three different types of fast food restaurant. Secondly, there were no significant differences in the foodservice attributes between the means of the importance and salience for each of the selected fast food restaurants. Thirdly, there were no significant differences in the foodservice attributes in determining between the three types of fast food restaurant. Fourthly, there were no significant differences for the foodservice attributes between the mean importance (or salience) and universal mean for each of the selected fast food restaurants. Finally, the results of this study could provide some insight into the type of marketing strategies that may be successfully used by marketers who manage fast food restaurants.

호텔 조리부 베이커리 조리사의 이직요인에 관한 연구

민계홍,안호기 한국조리과학회 2005 한국식품조리과학회지 Vol.21 No.2

The purpose of this study was to examine the causes of bakery employees quitting their jobs at hotels in order to make more efficient use of human resources by increasing personnel management efficiency and reducing the turnover rate, The subjects in this study were employees working for bakeries at top-ranked hotels, and the responses from 266 respondents were selected for analysis. The survey was conducted from July 1 through 20, 2003. Frequency analysis, factor analysis, reliability analysis, t-test, ANOVA and regression analysis were performed for data handling. The major findings of this study were as follows: First, concerning salaries, their turnover intention was influenced by whether they were properly paid or gained a sufficient living. Second, as for environmental factors, their turnover intention was affected by performance appraisal and interpersonal trust with colleagues. Third, regarding job-related factors, their turnover intention was impacted by the clarity of their job definition, their degree of job satisfaction and the suitability of their posts. Fourth, the change of job was influenced by the desire for a job in another region, in another company and of another kind. To successfully manage employee turnover at hotel bakeries, employees should be properly paid, and different performance appraisal standards, including a multilateral evaluation system, should be applied according to the nature of the department. Furthermore, there should be a clear distinction between sales and other works, and they should be carefully treated to increase job satisfaction.

일렬 자가조혈모세포이식을 받은 다발성 골수종 환자에서 발생한 뇌 톡소포자충증 1례

김계형,송경호,전재현,박완범,박상원,김홍빈,김남중,김인호,오명돈 대한감염학회 2010 감염과 화학요법 Vol.42 No.3

Toxoplasmosis is a rare but fatal complication in hematopoietic stem cell transplant recipients, usually associated with allogeneic hematopoietic stem cell transplantation (HSCT). We report a case of cerebral toxoplasmosis in a patient with multiple myeloma, following tandem autologous stem cell transplantation. A 55-year-old Korean male presented with weakness in both legs that had progressed to both arms. A magnetic resonance imaging scan of the brain revealed multiple, variablesized ring-enhancing lesions with surrounding edema in the cerebral hemispheres and brain stem. Stereotactic biopsy revealed bradyzoites of Toxoplasma gondii in the brain tissue. The patient received trimethoprim-sulfamethoxazole, followed by pyrimethamine and sulfadiazine, accompanying treatment for progressive multiple myeloma. Cerebral toxoplasmosis should be considered as one of the differential diagnoses in patients with neurologic signs following autologous HSCT.