• 정보보호학회논문지
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• 제12권6호
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• pp.17-28
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• 2002

XTR은 유한체 GF( $p^{6}$)의 곱셈군의 부분군의 원소를 새롭게 표현하는 방법이며, 유한체 GF( $p^{6m}$)으로도 일반화가 가능하다.$^{[6,9]}$ 본 논문은 XTR이 적용 가능한 확장체 중에서 최적 확정체를 제안한다. 최적 확장체를 선택하기 위해 일반화된 최적 확장체(Generalized Optimal Extension Fields : GOEFs)를 정의하며, 소수 p의 조건, GF(p)위에서 CF( $p^{2m}$)을 정의하는 다항식, GF($P^{2m}$)에서 빠른 유한체 연산을 실현하기 위해서 GF($P^{2m}$)에서 빠른 곱셈 방법을 제안한다. 본 논문의 구현 결과로부터, GF( $p^{36}$ )$\longrightarrow$GF( $p^{12}$ )이 BXTR을 위한 가장 효과적인 확장체이며, GF( $p^{12}$ )에서 Tr(g)이 주어질 때 Tr( $g^{n}$ )을 계산하는 것은 평균적으로 XTR 시스템의 결과보다 두 배 이상 빠르다.$^{［6,10］}$ (32 bits, Pentium III/700MHz에서 구현한 결과)

• 한국산업보건학회지
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• 제33권2호
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• pp.171-187
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• 2023

Objectives: Aircraft cabin cleaning work is characterized by being performed within a limited time in a narrow and enclosed space. The objective of this study was to evaluate the exposure levels to dust, ultra fine dust(PM2.5) and black carbon(BC) among aircraft cabin cleaners. Methods: Active personal air sampling for respirable dust(n=73) and BC(n=47) was conducted during quick transit cleaning(cabin general and vacuum-specific) and seat cover replacement and total dust and PM2.5 were area-air-sampled as well. Also, size distribution of particle was identified with the cleaning workers targeted. Dusts were collected with PVC filters using gravimetric analysis. The concentration of PM2.5 and the particle size distribution were measured with real-time direct reading portable equipment using light scattering analysis. The concentration of BC was measured by aethalometer(filter-based real-time light absorption analysis instrument). Results: The geometric mean of respirable dust was the highest at vacuum cleaning as 74.4 ㎍/m³, following by replacing seat covers as 49.3 ㎍/m³ and cabin general cleaning as 47.8 ㎍/m³ . The arithmetic mean of PM2.5 was 4.83 ~ 9.89 ㎍/m³ inside the cabin, and 28.5~44.5 ㎍/m³ outside the cabin(from bus and outdoor waiting space). From size distribution, PM_2.5/PM₁₀ ratio was 0.54 at quick transit cleaning and 0.41 at replacing seat covers. The average concentration of BC was 2~7 ㎍/m³, showing a high correlation with the PM2.5 concentration. Conclusions: The hazards concentration levels of aircraft cabin cleaners were very similar to those of roadside outdoor workers. As the main source of pollution is estimated to be diesel vehicles operating at airports, and it is necessary to replace older vehicles, strengthen pollutant emission control regulations, and introduce electric vehicles. In addition, it is necessary to provide as part of airport-inftastructure a stable standby waiting space for aircraft cabin cleaners and introduce a systematic safety and health management system for all workers in the aviation industry.

• Journal of Radiation Protection and Research
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• 제48권2호
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• pp.59-67
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• 2023

Background: This study aims to reevaluate natural radiation exposure, following up on our previous study conducted in 2019, and to assess the associated risk of lung cancer to the public residing in the gold mining areas of Betare-Oya, east Cameroon, and its vicinity. Materials and Methods: Gamma-ray spectra collected using a 7.62 cm×7.62 cm in NaI(Tl) scintillation spectrometer during a car-borne survey, in situ measurements and laboratory measurements performed in previous studies were used to determine the outdoor absorbed dose rate in air to evaluate the annual external dose inhaled by the public. For determining internal exposure, radon gas concentrations were measured and used to estimate the inhalation dose while considering the inhalation of radon and its decay products. Results and Discussion: The mean value of the laboratory-measured outdoor gamma dose rate was 47 nGy/hr, which agrees with our previous results (44 nGy/hr) recorded through direct measurements (in situ and car-borne survey). The resulting annual external dose (0.29±0.09 mSv/yr) obtained is similar to that of the previous study (0.33±0.03 mSv/yr). The total inhalation dose resulting from radon isotopes and their decay products ranged between 1.96 and 9.63 mSv/yr with an arithmetic mean of 3.95±1.65 mSv/yr. The resulting excess lung cancer risk was estimated; it ranged from 62 to 216 excess deaths per million persons per year (MPY), 81 to 243 excess deaths per MPY, or 135 excess deaths per MPY, based on whether risk factors reported by the U.S. Environmental Protection Agency, United Nations Scientific Committee on the effects of Atomic Radiation, or International Commission on Radiological Protection were used, respectively. These values are more than double the world average values reported by the same agencies. Conclusion: There is an elevated level of risk of lung cancer from indoor radon in locations close to the Betare-Oya gold mining region in east Cameroon. Therefore, educating the public on the harmful effects of radon exposure and considering some remedial actions for protection against radon and its progenies is necessary.

• 사상체질의학회지
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• 제23권3호
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• pp.391-401
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• 2011

1. Objectives: Though the eating habits have improved and the living method has become convenient according to the economic growth thanks to the modern industrialization, because of the lack of exercise, obesity, wrong eating habits and stress etc, various symptoms of disease of adults are on the rise. This is the phenomenon that happens as the eating life has become life in the West along with the inundation of the western culture in our society. In this perspective, there has been many various clinical research that's been proceeded so far about the physical constitution and obesity, but there has been little research on the objective analysis of the clinical research about the alimentotherapy using taeeumjoweetang. 2. Methods: In this research we have checked the weights, fat rates, fat weight, abdominal fat rate, blood pressure, and BMI over the objects of the women that were diagnosed as lunisolar system as their physical constitution, and assessed the paramecium lipid, in-blood antioxidation enzyme and the damage of oxidization in the urine by physical constitution-specific of the body shapes that were determined by BMI. The statistical analysis of the current research was processed by using of SPSS 17.0 program. We have figure out statistical amounts such as the arithmetic average, average deviation rate and percentage number. Fro the verification of he significancy of each elements, we have used the paired t-test, ANOVA, Chi-square test at the level of p<0.05. 3. Results and Conclusions: Their characteristics are age $21.20{\pm}1.35$, height $160.30{\pm}6.11cm$, weight $64.66{\pm}8.72kg$, fat rates are $35.97{\pm}4.87%$, fat amount $23.40{\pm}5.48$, abdominal fat rate $0.823{\pm}0.03$, BMI $25.12{\pm}2.79kg/m^2$, and systolic blood pressure $111.60{\pm}10.28mmHg$ and diastolic blood pressure $68.60{\pm}7.43mmHg$ and we have let them take the medicine twice a day for 8 weeks. The clinical result for the Cholesterol, Triglyceride, HDL-cholesterol, LDL-cholesterol, SGOT, SGPT, of the object people was that for the function of the liver, the result of the SGOT and SGPT test was $17.16{\pm}3.05$, $15.00{\pm}2.99IU/L$, which was a decrease, and had statistical meaning, but for the SGOT, though the figure reduced to $11.92{\pm}4.61$, $10.80{\pm}3.07$, it had no statistical meaning. For the whole cholesterol level, the figure reduced to $169.00{\pm}19.95$, $160.08{\pm}22.52$ mg/dL and had statistical significance(p<0.05). Neuter fat number, Triglyceride has slightly increased to $67.52{\pm}36.32$, $68.08{\pm}47.33$ mg/dL but did not have any statistical meaning. The antioxdant enzyme marker standard marker, SOD has increased to $2.52{\pm}0.73$, $2.86{\pm}0.60U/ml$, and had statistical significance(p<0.01). Catalase also increased by $0.63{\pm}0.18$, $1.07{\pm}0.25mmol/ml$ and had statistical meaning(p<0.01). GPx also increased to $204.76{\pm}32.64$ nmol/ml and had statistical meaning(p<0.01). But, for the Total antioxidant, though it has raised to $1.51{\pm}0.26$, $1.57{\pm}0.17nmol/{\mu}l$, it did not have any statistical meaning. MDA of oxidative stress marker has decreased to $1.70{\pm}0.68{\mu}g/ml$, $1.21{\pm}0.50{\mu}g/m$ and had statistical significance(p<0.01). 8-OHdG also decreased $3.35{\pm}0.95ng/ml$, $2.21{\pm}0.50ng/ml$ and had statistical meaning(p<0.01). In this research, we have analyzed the various markers relating to BFM and changes in oxidative enzyme in blood by takingtaeeumjoweetang. Taeeumjoweetang has the positive effect on inbody antioxidant system and reducing the content of cholesterol, which is proven to help losing weight and improving hyperlipidemia statistically. With this research, we hope to improve the lifestyle of those who are either obese or need to manage their dietary habits, and also to become the touchstone of integrating Oriental Medicine with the science of food & nutrition.

• 한국식품조리과학회지
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• 제4권1호
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• pp.75-85
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• 1988

1987년 6월 5일부터 7월 20일까지 대도시, 중소도시, 농촌, 어촌, 산촌 등 5개 지역 주부 296명을 대상으로 유지류의 관리와 섭취량 등을 조사하여 지역별 학력별 연령별로 비교 검토한 결과는 다음과 같다. 1. 일반사항 본 조사대상 주부들 중 도시지역 주부는 30대가 많았고 농·어·산촌 지역 주부는 50대 이상이 많았으며 학력수준은 도시지역이 높았다. 가족수는 대부분 3∼6인(83.1%)으로 전체의 74.7%가 소가족형태였으며 조사된 총가족수는 1,379명으로 남·여 분포는 거의 같은 비율이었다. 2. 영양지식 대상주부들 중에서 도시지역 주부와 교육 수준이 높은 주부들이 일반적인 영양 지식이 높게 나타났다. 또한 필수지방산을 알고 있는 주부는 32.8%이었으나 이에 대하여 정화하게 알고 있는 주부는 그 중 2/3 정도로 전반적으로 잘 모르고 있었다. 기름 섭취량은 앞으로도 현재와 거의 같은 양을 섭취하겠다는 주부(67.2%)가 많아 기름의 섭취량을 증가시킬 의사는 거의 없는 것으로 나타났다. 3. 식용유의 구입과 보관 식용유 구입시 설명서 구독율은 도시지역 주부와 교육수준이 높은 주부들이 높았으며, 구입과 사용시 불만은 품질(46.7%)에서 높게 나타났다. 식용유는 대부분 유리제품(64.7%)이나 합성수지제품(31.5%)용기에 넣어 그늘진 시원한 곳에 보관(97.7%)하여 기름의 품질보존에 주의를 기울이고 있는 점을 알 수 있었다. 4. 식용유의 사용 및 정제 대부분의 주부들이 일단 사용한 식용유를 거른 후에 다른 용기에 보관하고 있는 반면 재사용시에 새기름을 보충하여 사용하는 주부는 30.0% 밖에 안되고 있어 보관에 대한 관심도에 비하여 재사용에 대한 지식이 떨어지고 있음을 알 수 있었다. 5. 유지 밑 유지함유식품의 섭취량 1인 1일 유지 및 유지 함유 식품의 섭취량은 유지류 6.85g, 육류 및 육류가공식품 42.96g, 어패류 95.13g, 알류 22.89g, 콩류 및 콩제품 60.69g, 우유 및 유제품 61.00g, 종실류 4.22g, 인스턴트면류 9.36g이었다. 이들 식품으로부터 환산된 1인 1일 지방 섭취량은 대도시 37.8g, 중소도시 27.2g, 농촌 21.5g, 어촌 18.3g, 산촌 17.7g이었으며, 평균적으로 24.7g이었다. 이는 총열량의 20%3(성인 44.4~55.6g)인 지방권장량과 비교할 때 상당히 미달되고 있는 것으로 나타났다. 모든 유지함유식품은 농·어·산촌 지역보다 도시지역에서 더 많이 섭취하고 있었으며, 특히 도시 지역에서 육류와 우유 및 유제품을 많이 섭취하고 있었다. 이에 따라 유지류의 섭취패턴은 지역별로 3가지로 구분할 수 있었다. 즉 가장 많은 대도시, 중간인 중소도시와 농촌, 그리고 가장 적은 어촌과 산촌으로 섭취패턴을 구분할 수 있었다.

• 치위생과학회지
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• 제5권1호
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• pp.39-43
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• 2005

본 연구는 치과에 근무하는 여자 치과위생사들을 대상으로 삶의 질에 미치는 영향요인을 규명하여 건강과 관련된 생활양식을 바람직하게 개선하는데 도움을 주고, 보다 나은 삶의 질 개선 및 치과위생사들을 위한 건강증진 프로그램을 개발하기 위한 기초 자료를 제공하고자 수행 되었다. 연구의 결과를 요약하면 다음과 같다. 첫째, 연구 대상자의 삶의 질의 만족도는 평균 $3.1{\pm}0.4$으로 나타났다. 하위영역별로 사회여건 만족도($3.2{\pm}0.5$)가 가장 높았으며, 다음으로 조직여건 만족도($3.1{\pm}0.6$), 개인여건 만족도($3.1{\pm}0.5$) 순으로 나타났다. 연구 대상자의 건강증진 생활양식은 평균 $2.5{\pm}0.4$이었다. 하위 영역별로 위생적 생활($3.2{\pm}0.4$)이 가장 높았고, 전문적인 건강관리($1.73{\pm}0.5$)가 가장 낮음을 보였다 둘째, 일반적 특성에 따른 삶의 질은 연령이 증가할수록(P=0.0035), 학력이 높을수록(P=0.0111), 소득이 높을수록(P<0.0001), 미혼 보다는 기혼(P=0.0016)에게서 높게 나타났으며, 경력이 많을수록(P=0.0014), 지각된 건강상태는 매우 건강할수록(P<0.0001) 삶의 질의 만족도가 통계적으로 유의하게 높았다. 일반적 특성에 따른 건강증진 생활양식 실행정도는 연령이 증가할수록(P<0.0001), 학력이 높을수록(P=0.0011), 소득이 높을수록(P<0.0001), 미혼 보다는 기혼(P=0.0002)에게서 높게 나타났으며, 경력이 많을수록(P<0.0001), 지각된 건강상태는 매우 건강할수록(P<0.0001) 통계적으로 유의하게 높았다. 셋째, 삶의 질에 영향을 미치는 주요 요인을 규명하기 위하여 다중회귀분석을 실시한 결과 전체변수의 설명력은 37.6%로 나타났고, 건강증진 생활양식, 소득, 지각된 건강상태가 통계적으로 유의하게 영향을 미치는 요인들로 나타났다. 본 연구는 서울시에 근무하는 치과위생사를 대상으로 하였기 때문에 전체 치과위생사를 대표하기에 무리가 따를 수 있다. 일반화를 위해서는 대상자 수를 늘리는 것 외에도 각 지역별로 표본을 선정한 반복 연구가 필요할 것으로 보인다. 또한 치과위생사의 삶의 질을 향상시키기 위한 객관적인 자료로서 향후 건강증진프로그램의 개발에 필요한 기초 자료의 역할을 실행할 수 있을 것으로 사료된다.

• 대한교통학회지
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• 제17권1호
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• pp.29-39
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• 1999

본 연구는 우리나라의 고속도로 기본구간에서 기상조건에 따른 도시고속도로 교통류의 특성을 분석한 것이다. 본 연구의 주요 결과를 요약하면 다음과 같다. 첫째, 비가 올 경우 속도-교통류율간의 관계는 길어깨쪽 차로를 제외하고 차로별로 큰 차이가 없이 유사한 패턴을 보이는 것으로 나타났다. 둘째 교통류율-점유율간의 관계식은 비가 올 경우 그 관계성은 더 분명해지지만, 서비스교통류율이 약 200대/시/차로 정도 감소하는 것으로 나타났다. 셋째, 비가 올 경우 도로의 관측된 서비스교통류율은 맑은 날에 비해 약 10-20% 정도 감소하는 것으로 나타났으며, 이러한 결과는 1998 HCM에서 제시한 결과 및 교통류율-점유율 관계식의 기울기 감소 패턴과 일치한다. 넷째, 비가 올 경우 전체 차로의 소통능력은 맑은 날에 비해 감소하고 전반적으로 중앙분리대쪽 차로의 소통 능력이 길어깨쪽 차로에 비해 높은 것으로 나타났으나, 기상변화에 따른 차로별 임계속도와 임계점유율은 큰 변화가 없는 것으로 나타났다. 본 연구는 도시고속도로 기본구간의 1개 지점에서 나타난 특성으로서 공간적 분포 특성을 고려하기 위해서는 향후 연구에서 다양한 조건을 갖는 도로지점에 대해 분석해야 할 것이다. 또한 비 뿐만 아니라 안개나 눈에 의 한 영향을 고려한 상세한 분석이 필요하다. 본 연구의 결과는 그간 일반적으로 알려졌던 내용과 큰 차이는 없지만 실제로 고속도로를 설계하거나 운영하는데 근거자료로 활용할 수 있는 자료를 제공하는 측면에서 의미가 있다고 판단되며, 도로용량편람을 개정 및 수정하는 과정에서 명확히 명시해야할 기초자료를 제공하고 있다.Bayesian pooling technique for estimating the dynamic link travel time of networks. The proposed algorithm has been validated using the field experiment data out of GPS probes and detectors over the roadways and the estimated link travel time from the algorithm is proved to be more useful than the mere arithmetic mean from each traffic source. the whole sentence(preceeding sentence and the accompanying sentence). The conjunctive endings are '-고₂, -으며₂, -다가₂, -어서, -고서, 을수록, -은데₂, -으면₂, -어야₂, -어도₂, -으니까₂, -거든₁,'etc. Type C can be interpreted as the neutralized tense of the preceeding sentence and the absolute tense of the accompanying sentence. The conjunctive endings are '-으러, -으려고, -고자, -도록, -게,'etc. Type D can be described as the relative tense of the part of the preceeding sentence and the

• 한국직업건강간호학회지
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• 제3권호
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• pp.54-70
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• 1993

According as the automation of clerical work(OA ; Office Automation) develops, the use of VDT(Visual or Video Display Terminal) is increasing suddenly. But, in proportion to the spread of office automation(OA tendency), the self-conciousness syptom attendant upon the work is appearing also (Kim, Jung Tae, Lee, Young Ook, 1990). The apparatuses of office enable the clerical workers to be convenient and perform mass businesses. But, they are increasing the opportunity to be exposed to VDT syndrom, techno stress, computer terminal disease, pain by muscle strain(RSI), bradycausia of noise nature, and electromagnetic waves, etc. which are referred to as the new type of occupational diseases to the workers. It is the real situation that the workers to use VDT is complaining of the physical inconvenience sense in the recent newspaper and literature, it is the point of time that the sydrome to come from VDT use and computer terminal disease, etc. must be classified into the occupational disease(Lee, Kwang Young 1990, Lee, Kyoo Hak 1990, Lee, Won Ho 1991, Lee, Si Young 1991, Lee, Joon 1991, Choi, Young Tae 1991, Heo, Seung Ho 1989). In addition, it is the real situation that the scientifitic study result about the scope that electromagnetic waves has influence on the human body has not been suggested yet, and criticism on the stable exposure permission standard about electromagnetic waves to be emitted from VDT and on the problem in the health about electromagnetic waves is continuing. (IEEE Spectrum, 1990). In addition according to the experience of nursery business of industry field, it is the real situation that the patients who consult complaining of physical and mental inconvenience sence, among the users of apparatus of office automation, are reaching 10% of the patients coming to doctor's room. Therefore, it is necessary to confirm the self-consciousness symptom that the clerical workers complain of multilaterally with the actual state examination about the use of the apparatuses of offices automaton. Thus, this study was tried as th basic data for the cosultation and education for the maintenance and furtherance of the health of workers as the nurse of industry field, by confirming the contents of self-consciousness symptom attendant upon the use of the apparatus for office outomation making the financial institution in which the spparatus for office automation in most frequently used as the subject, and by examining whether there is the difference according to the subject of study, the data were collected, by using the questionnaire method, making 200 workers who consented to the study participation as the subject, among the persons who have spent over 3 months since they used the apparatuses for office automation and didn't receive the treatment in hospital due to the clerical disease for recent 3 years. The period of data collection was from Oct. 9, 1991 to Oct. 12. As for the measurement instrument about the complaint if self-consciousness symptom attendant upon the use of apparatuses fo office automation, the question item on the complaint symptom of health problem attendant upon the treatment of VDT that Kim(1991) developed and on CMI health problem and the question items on the fatigue degree due to industry were used by previous examination to 25 persons. Collected data were analyzed with the statistical method such as percentage, arithmetic mean, Person correlation coeffient, Kai square verfication, t-test, ANOVA, etc. by using SPSS/PC+ program, and the result is as follows : 1. The self-consciousness symptom that the clerical workers complained of most frequetly appeared high in 'My eyes are tired'(99.4%), 'I feel fatigue and weariness'(99.4%), 'I feel that my head is heavy5(90.0%), 'eyesight fell'(88.8%), 'I have a stiff neck'(88.8%), 'I fell pain in the shoulder'(85.0%), 'I feel cold and painful in the eyes'(76.9%), 'I feel the dry sense of eyeball'(76.2%), 'My nerves are edgy, and I an fretful, (75.6%), 'I feel pain in the waist'(73.2%) and 'I fell pain in the back'(72.8%). It emerged that the subject use the apparatuses for office automation complained of self-consciousness symptoms related to visual symptoms and musculoskeletal symptoms. 2. As for the general feature of examination subjects, the result to see the distribution by classifying into sex, age, school career, use career of apparatuses for office automation, skillfulness degree of the use of apparatus for office automation, use hours of the apparatuses for office automation per 1 day, type of business of the apparatus for office automation, rest hours during the use of apparatus for office automation, satifaction degree of business of office automation, and work circumstance, etc. emerged as follows : As for the sex of subjects, the distribution showed that men were 58.8% and women were 41.3%, Age was average 26.9. As the distribution of school career, the distribution showed that4below the graduation of high school' was 58.8%, 'graduation from junior college-university' was 35.0%, and 'over graduate school' was 6.3%. In the question to ask the existence or non-existence of experience of health consultation in connection with the work of office automation, the response that I had the consultation exprience and I feel the necessity emergerd as 90.1% And, the case that the subject who didn't wear the glasses or lens before using the OA apparatus wear glasses or lens after using OA apparatus emerged as 28.3% of whole. As for the existence or non-existence of use career of OA apparatus, the case under 3 years was highest as 52. 7%. As for the skillfulnness degree about the use of apparatus for office automation, most of them are skillful with the fact that 'common' was 44.4%, 'skill' was 42.5%, and 'unskillful' was 13.1% As for the use average hours of the apparatus for office automation per 1 day, the distribution showed that the case under 3-6 hours was 33.1%, the case under 6-9 hours was 28.1%, the case under 3 hours was 30.6%, and the case over 9 hours was 8.1% Main OA business and the use hours for 1 day showed in the order of keeping and retrieval, business of information transmission(162min), business of information transmission(79.3 min), business of document framing(55.5 min), and business of duplication and printing(25.4min). as for the rest during the use of apparatus for affice automation, that I take rest occasion demands the major portion, but that I take after completing the work emerged as 33.8%. Though the subiness gets to be convenient by the use of the apparatus for of office automation, respondents who showed the dissatisfaction about the present OA business emergd high as 78.1%. The work circumstances of each office was good with the fact that the temperature of office was 21.8, noise was average 42.7db, and the illumination was average 364.4 lx, in the light of ANSi/HFS 100 Standard. 3. Sight syptom, musculoskeletal symptom, skin and other symptoms showed the significant difference according to the extent of skillfulness of the apparatus for office automation. All the symptoms exept skin symptom showed the difference according to the use hours of the apparatus for office automation. All the question items exept the sytoms of digestive organs and the rest hours during the apparatus for office automation showed the signicant difference. The question item which showed the signicant difference from the satisfaction degree of present OA business showed the significant difference from all the question item classified into 6 groups. But, age and school career didn't significant difference from the complaint of any self-consciousness symptoms.