• Asian Pacific Journal of Cancer Prevention
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• 제13권8호
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• pp.3617-3619
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• 2012

Background: The completeness of cancer registration is a major validity index of any reported cancer incidence. The present study aimed to evaluate the esophageal cancer incidence registered in the Tehran Metropolitan Area Cancer Registry. Materials and methods: The data on esophageal cancer abstracted from three sources of 1) pathology departments, 2) medical records, and 3) death certificates during 2003 till 2007 were utilized. The completeness of the data sources were evaluated using coverage (defined as the proportion of a community population with esophageal cancer identified by the source) and density (defined as the proportion of non-empty fields of the data by source). Results: A total 1,404 cases of esophageal cancer were reported for the duration of the study. Pathology provided 771, medical records 432, and death certificates 609. The coverage was 0.55 for pathology, 0.31 for medical records, and 0.43 for death certificates. The respective density values were 0.82, 0.96 and 0.98, respectively. Pathology (0.45) was the most complete source followed by medical records (0.42), and death certificates (0.29). Discussion: A low degree of completeness dictates putting more effort into case finding plus abstracting data more thoroughly.

• 한국정보과학회논문지:정보통신
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• 제30권3호
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• pp.329-342
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• 2003

기존의 애드-혹 네트워크를 위한 멀티캐스트 프로토콜들에서는 송신원 수가 많은 경우의 프로토콜 효율성을 고려하지 않아, 송신원 수가 많아지는 경우 프로토콜 오버헤드가 지나치게 커지거나, 데이타 전달율이 저하되는 결과를 가져올 수 있다. 이에 본 논문에서는 멀티캐스트 그룹의 송신원 수에 대한 확장성을 고려한 애드-혹 네트워크를 위한 멀티캐스트 라우팅 프로토콜을 제안한다. 제안하는 프로토콜은 송신원 중 일정 비율을 코어 송신원으로 선택하고, 선출된 코어 송신원을 루트로 하여 각 코어 송신원으로부터 멀티캐스트 그룹의 모든 수신원에 이르는 코어 송신원별 트리를 구성한다. 이렇게 구성된 코어 송신원별 트리의 합집합으로 데이타 전달 메쉬를 형성하고, 일반 송신원들은 가장 가까운 곳에 위치한 코어 송신원을 선택하여 해당 코어 송신원을 통해 데이타 패킷을 전송하게 된다 제안하는 프로토콜이 효율적으로 동작하기 위해서는 적절한 수의 코어 송신원을 선출하는 것이 중요하다. 너무 많은 수의 코어 송신원을 선출하게 되면, 데이타 전달 경로를 유지하기 위해 코어 송신원이 주기적으로 플러딩하는 제어 메시지 오버헤드나 불필요한 중복 데이타 패킷 오버헤드가 과다하게 된다. 반면에 너무 적은 수의 코어 송신원은 호스트의 이동성에 대해서 안정적인 경로를 제공하지 못하고 전달 트리 상에 과부하가 발생할 수 있어 데이타 전달율을 저하시키는 결과를 가져온다. 제안하는 프로토콜은 코어 송신원이 주기적으로 플러딩하는 제어 메시지를 통해 데이타 전달 메쉬를 최적으로 재구성하고, 주기적인 최적 재구성 기간 사이에는 지속적인 메쉬의 연결 유지를 위해 국부적 메쉬 재구성을 수행한다. 시뮬레이션을 통하여 기존에 제안된 프로토콜들과 성능을 비교한 결과, 제안하는 프로토콜이 멀티캐스트 그룹의 송신원 수가 많은 경우에 데이터 전달율 및 오버헤드 측면에서 보다 효율적인 멀티캐스트 통신을 제공함을 알 수 있었다.화에 따른 이방성 에너지를 계산하였으며, 150 K에서 124.01 erg/$cm^3$로 최대값을 갖음을 알 수 있었다.다.었다.었다.다.었다.시료는 황산염 환원반응을 거쳐 $10{\textperthousand}$이상의 높은 ${\delta}^{34}S$ 값을 보이고, $7{\textperthousand}$ 내외의 ${\delta}^{34}S$ 값을 보이는 지하수는 황철석과 대기기원 외에도 인위적 오염에 의한 황 성분의 유입 가능성을 배제할 수 없다.해지는 것을 방지 할 수 있었다. 5. 주관적 감각으로 온냉감, 습윤감, 쾌적감, 피로감을 측정하였는데 유공안전모 착용시가 무공안전모 착용시보다 더 낮은 주관적 감각 수치를 나타내어 착용감이 더 좋았음을 알 수 있었다. 또한 근력측정에서 무공안전모 착용시가 유공안전모 착용시 보다 평가 수치 가 낮게 나타나 더 피로한 것을 알수 있다. 이상의 결과에서 통기를 목적으로 구멍을 뚫어놓은 유공작업안전모가 심부온, 피부온, 혈압, 심박수, 발한량, 모자내 기후 등의 인체생리반응을 고려해 볼 때 더 바람직한 작업 안전모 형태라는 것을 알 수 있었다. 종래의 작업과 관련한 피복연구에서 작업복, 장갑, 신발에 대하여는 생리학적 연구가 이루어졌으나, 안전모에 관한 연구에서는 생리학적인 부분을 고려하지 않고 단지 안전 보호측면에서의 연구가 이루어졌을 뿐이었다. 따라서 서열환경하에서 머리부분의 쾌적성을 고려한 다양한 작업 안전모에 대한 계속적인 연구와 개발이 이루어진다면 물리적 측면에서 작업 안전을 만족시킬 뿐만 아니라 생리적 측면에서 체열 평형을 도모하여 작업 능률의 향상을 가져올 것이다.나타났다(p<0.01). 남성들은 여성에 비해 소주를, 여성들은 남성에 비해 맥주를 즐겨 마셨으며 (p<0.001), 21~30세에서는 소주보다 맥주를,

• 천문학회지
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• 제21권2호
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• pp.117-132
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• 1988

Multi-frequency polarization observations of Abell 695 are reported here. The brightest radio source 0838+325, which was previously classified as a wide angled head-tail radio source, is, in the present observations, resolved into two separable sources, a head-tail source 0838+325 AB and a diffuse one 0838+325C. The radio-tail shows high degree of linear polarization(${\sim}50$-25%) along the radio-tail, suggesting that the interaction with its surrounding intracluster medium (ICM) is not highly turbulent. With the present data, thermal particle densities at the locations of these sources are estimated to be n > $10^{-5}\;cm^{-3}$.

• International Journal of Human Ecology
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• 제11권2호
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• pp.51-61
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• 2010

Using data from the 2007 SCF, this study examined the use of information source for investment decisions of elderly consumers. The results indicated that many elderly consumers (about 88%) involved savings /investment decisions. The elderly used 'Experts' (39.48%) as a major information source for their investment decisions, followed by 'Friends' (24.18%). The results of the multinomial logit analysis suggested that the perceived value, the cost for search, knowledge, risk and some of the demographic factors were significantly related to the choice of the information sources for investments by elderly consumers.

• 가정과삶의질연구
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• 제14권4호
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• pp.107-128
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• 1996

This study is conducted to examine elderly consumers' information needs according to information sources. And the relation with related variables purchasing problems of the elderly consumers and their needs according to information sources is investigated. The data was collected from 782 elderly consumers ages range from 55 to 74 and major findings are as follows: (1) Their needs according to information sources are relatively high and followed by neutral information source department store personnels and advertisements (2) The more esperiences they have and the more seriously they perceive their purchasing problems in a relatively poor conditon of a market the more information they want from department store personnels. (3) How many experiences they have and how much they perceive seriously in purchasing problems are the major intervening variables which have strong positve effects on the needs. The experiences show the strongest effects on the needs. The level of the percept on is strongly related to the needs and neutral information source is the major effect among the information sources.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 C
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• pp.1784-1786
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• 2004

PD(Partial Discharge) signal emitted from PD sources has their intrinsic features in the region of time and frequency. STFT(Short Time Fourier Transform) shows time-frequency distribution at the same time. 2-Dimensional matrices(33${\times}$77) from STFT for PD pulse signals are a good feature vectors and can be decreased in dimension by wavelet 2D data compression technique. Decreased feature vectors(13${\times}$24) were used as inputs of Back-propagation ANN(Artificial Neural Network) for discrimination of Multi-PD sources(air discharge sources(3), surface discharge(1)). They are a good feature vectors for discriminating Multi-PD sources.

• 천문학회지
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• 제38권2호
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• pp.141-144
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• 2005

Based on optical galaxy data, we executed a systematic search for galaxy clusters around the 15 steady unidentified EGRET GeV gamma-ray sources in high Galactic-latitude sky ([b] > $30^{\circ}$). We found a strong correlation with 3.7$\sigma$ level between close cluster pairs (merging cluster candidates) and the unidentified EGRET sources, though, in contrast, no correlation with single clusters. This result implies that merging clusters of galaxies are a possible candidate for the origin of high galactic-latitude, steady unidentified EGRET gamma-ray sources.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제54권7호
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• pp.332-338
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• 2005

PD(Partial Discharge) signal emitted from PD sources has their intrinsic features in the region of time and frequency STFT(Short Time Fourier Transform) shows time-frequency distribution at the same time. 2-Dimensional matrices(33$\times$77) from STFT for PD pulse signals are a good feature vectors and can be decreased in dimension by wavelet 2D data compression technique. Decreased feature vectors(13$\times$24) were used as inputs of Back-propagation ANN(Artificial Neural Network) for discrimination of Multi-PD sources(air discharge sources(3), surface discharge(1)). They are a good feature vectors for discriminating Multi-PD sources in the air.

• 한국생활과학회지
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• 제13권2호
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• pp.291-300
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• 2004

The purposes of this study were to research the clothing shopping orientations and the utilizations of information sources according to values of male consumer aged between the 20's and the 30's. The data were analyzed by factor analysis, one-way ANOVA, Duncan's multiple range test, x2- test, Pearson's correlation. The results of the study were as follows: 1. Male consumer's values were classified into 2 factors, and consisted of three groups. 2. There were significant differences among groups according to demographics variables. 3. Clothing shopping orientations were classified into 6 factors and information sources were classified into 3 factors. 4. There were relationships between male consumer's values, clothing shopping orientation, and utilization of information sources.

• 패션비즈니스
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• 제2권4호
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• pp.28-39
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• 1998

The purpose of this study was to demonstrate the information sources according to the benefit segmentations of New kids' jeans wearing. The subject consisted of 392 adolescents in Seoul and Honsung area. For analysis of data, confirming factor analysis, correlations, stepwise regression analysis were applied. The results were as follow ; 1. The benefit segmentation dimensions of New kids' jeans wearing were brand royalty, personality, fashionality, and utility pursuit. 2. According to the correlations between the benefit segmentation and the information sources, brand royalty was positive correlation with all information sources. Similary, both personality and fashionality were positive correlation with market initiated and neutral information. The other hand. only utility was negative correlation with neutral information. 3. In influences of the information sources according to the benefit segmentations, market initiated information is high valued in personality, fashionality, utility, and brand royalty. Neutral information is high valued in fashionality.