• 대한수학회보
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• 제32권1호
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• pp.85-91
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• 1995

For a locally compact Hausdorff space, we denote by $C_0(X)$ the Banach space of all continuous complex valued functions defined on X which vanish at infinity, equipped with the usual sup norm. In case X is compact, we write C(X) instead of $C_0(X)$. A well-known Banach-Stone theorem states that the existence of an isometry between the function spaces $C_0(X)$ and $C_0(Y)$ implies X and Y are homemorphic. D. Amir [1] and M. Cambern [2] independently generalized this theorem by proving that if $C_0(X)$ and $C_0(Y)$ are isomorphic under an isomorphism T satisfying $\left\$\mid$ T \right\$\mid$ \left\$\mid$ T^1 \right\$\mid$ < 2$, then X and Y must also be homeomorphic.

• Kyungpook Mathematical Journal
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• 제45권3호
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• pp.357-362
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• 2005

In this paper, we introduce a new notion which we call a generalized weakly ideal. We also investigate characterizations of strongly regular rings with the condition that every maximal left ideal is a generalized weakly ideal. It is proved that R is a strongly regular ring if and only if R is a left GP-V-ring whose every maximal left (right) ideal is a generalized weakly ideal. Furthermore, if R is a left SGPF ring, and every maximal left (right) ideal is a generalized weakly ideal, it is shown that R/J(R) is strongly regular. Several known results are improved and extended.

• Animal Systematics, Evolution and Diversity
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• 제40권3호
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• pp.157-166
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• 2024

A new oenonid polychaete, Arabella turbidiricolor sp. nov., collected from intertidal zone along the coasts of eastern, western, and southern Korea is described. In Korea, this new species might have been confused with Arabella iricolor(Montagu, 1804), the type species of the genus, in having the following characteristics: ventralmost chaeta tapering gradually to guard, MI left robust and right gracile, MII right long, MV both with one tooth and posterior postchaetal lobe shorter than chaetae. However, A. turbidiricolor sp. nov. is readily distinguished from the latter by the following features: ventral maxillary carriers longer than or equal to dorsal, MI both distally falcate, and pygidium with two swollen pads. We provide detailed descriptions and illustrations for the new species in the present study. Also, morphological characteristics of known Arabella species are compared and discussed with a key to them.

• 대한안전경영과학회지
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• 제6권2호
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• pp.79-89
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• 2004

It is known that most people have a dominant eye, even though each of their two eyes in isolation may provide equal vision. In this study, 600 Korean male and female subjects aging from 11 to 78 were selected to investigate the various statistics about eye dominance( whether the left or right eye is dominant} in Korean and their employment characteristics of preferred eye in sighting diverse things. A simple sighting test was applied such that subjects are requested to aim a distance target through small hole in B4 sized paper with both eyes open. The dominant eye was determined by alternate occlusion: when viewing with the dominant eye into the hole is aligned with the target, whereas when viewing with the other eye into the hole appears offset to one side. The descriptive statistics showed that 83.7% and 16.3% were right and left eye dominant respectively. Moreover, various statistical analysis revealed that general tendency of eye dominance was varied by age, gender, hand dominance and visual acuity. It was thus found from these results that people sighting their eyes differently depending on the eye dominance when they sight things.

• 대한두경부종양학회지
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• 제26권2호
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• pp.221-224
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• 2010

Papillary thyroid carcinoma frequently invades the lymph node, trachea, esophagus and perithyroid tissue. However, direct extension to posterior pharyngeal area is known to be rare. A 64-year-old male was referred to our clinic presenting as posterior pharyngeal mass during gastrofiberscopy. The neck CT scan showed soft tissue mass in retropharynx and lymph node in right level III with calcifications. We performed the total thyroidectomy with selective(level II, III, IV) and anterior compartment neck dissection. In operative findings, the right thyroid mass were connected to the retropharynx through the posterior portion of inferior constrictor muscle. Histopathologic findings revealed the papillary thyroid carcinoma extended to retropharynx. We report a unique case with a literature review.

• Journal of the Korean Data and Information Science Society
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• 제11권2호
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• pp.225-233
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• 2000

수명시험에서 시험에 장기간 노출된 대상 부품이나 실험 대상자의 수명은 관측되는 경우보다 관측중단이 일어나기가 쉽다. 이와 같은 경우에 임의중단모형에서 생존함수 추정량으로 흔히 이용되는 Kaplan과 Meier의 추정량은 수명분포의 오른쪽 꼬리부분에서 심각한 편의가 발생된다. 이러한 문제점에 대한 대안으로 정상적으로 관측된 최장수명보다 큰 관측중단수명이 많은 극단적인 오른쪽 관측중단모형에서 새로운 비모수적 생존함수 추정량을 제안하고 그 특성을 몬테칼로 모의실험을 통하여 기존의 추정량과 비교 분석하였다.

• Journal of Chest Surgery
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• 제31권1호
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• pp.73-76
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• 1998

저자들은 기관지 폐쇄와 기관지성 낭종을 동시에 가지는 매우 귀한 증례를 보고하는 바이다. 형태상 우상엽의 첨구역으로 가는 기관지가 우측 주기관지에서 직접 분지 하였다. 기관지성 낭종은 폐쇄된 구역 기관지와 서로 교통되어 있었으며 모두 점액으로 차 있었다. 이들의 원인은 잘 모르나 태생기 5∼6주 경에 발생하는 단일 인자에 의해서 두가지가 같이 발생하는 것으로 여겨진다.

• 대한핵의학회지
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• 제21권1호
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• pp.9-16
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• 1987

It is well-known that hepatic scintigraphv have been found to be less sensitive and specific in the detection of the diffuse hepatocellular diseases than that of the space-occupying lesions. To obtain the higher diagnostic specificity and sensitivity, we, using the computer quantitation, have attempted to analyze hepatic and extrahepatic $^{99m}Tc-tin$ colloid uptake patterns in various diffuse hepatocellular diseases retrospectively. The studied groups consisted of 116 cases of normal, 67 cases of acute hepatitis, 112 cases of chronic hepatitis, 61 cases of liver cirrhosis, 47 cases of fatty liver, 12 cases of hepatoma and 9 cases of metastasis, making total 424 cases. Scintigraphic imagings were obtained in the anterior, right lateral and posterior projections using high-resolution collimation, and simultaneously these gamma data were acquisited into the computer system. Both large region of interest (ROI) using light pen and ROI computer program were placed over right lobe, left lobe of liver, spleen and cardiac blood pool. Total counts in ROI were divided by the number of pixels in the ROI, and mean count rate per pixels calculated. Mean right-lobe counts were divded by mean-left lobe counts to determine right-to-left hepatic lobe ratio and mean spleen counts were divided by mean liver counts to determine spleen to liver ratio. The results were as follows. 1) Of 424 cases, 292 were male and 132 were female. The majority of age distribution was in $30\sim49$ (54.5%). 2) Inter-observer between two independant operators and inter-method between drawing by light-pen and ROI computer program variations were not significant. 3) The uptake count values (per pixel) determined at each area in normal group were $106.53{\pm}18.35$ in right lobe, $79.00{\pm}13.82$ in left lobe, $17.52{\pm}8.31$ in spleen and $8.09{\pm}3.43$ in cardiac blood pool. 4) In liver cirrhosis, right lobe uptake was decreased but spleen and cardiac blood pool uptakes were increased (p<0.01). 5) Right-to-left hepatic lobe uptake ratio was $1.37{\pm}0.24$ in normal group and significantly low in chronic hepatitis, liver cirrhosis and fatty liver, and more or less low in acute hepatitis. 6) Spleen-to-right hepatic lobe uptake ratio was $0.17{\pm}0.09$ in normal group and high in chronic hepatitis and liver cirrhosis. 7) The computer-quantitation of hepatic and extrahepatic uptake patterns thought to be sensitive and useful method in the interpretation of liver scintigram.

• 한국콘텐츠학회논문지
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• 제9권12호
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• pp.400-409
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• 2009

2007년 1월 개정방송법은 "국민적 관심이 매우 큰 체육경기대회 그 밖의 주요행사 등에 관한 방송을 일반국민이 시청할 수 있는 권리"로서 보편적 시청권(혹은 접근권) 도입을 천명했다. 이후 2008년 2월 시행령이 마련되었고, 7월 보편적시청권보장위원회가 설치되어 세부시행방안 및 지침을 마련 중이다. 보편적 시청권 제도의 실행은 충분한 숙의과정과 사회적 합의를 전제로 해야 하는바, 보편적 시청권의 대상과 우선방송사 규정에 관한 사안이 논의의 핵심이다. 이에 이 연구는 보편적 접근권 제도를 시행 중인 유럽과 호주 등 해외 주요 사례들을 검토해 우리현실에 적용할 수 있는 주요 시사점을 찾아내고, 시청자 조사를 통해 보편적 시청권 보장을 위한 세부 방안을 도출하고자 한다. 이를 통해 국민관심행사 목록, 우선방송사 선정 기준, 중계 관련 규칙 등 구체적인 가이드라인을 제시한다.

• Journal of Chest Surgery
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• 제13권4호
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• pp.507-511
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• 1980

Most cases of plasma-cell granuloma occur in adult skeleton system. They usually present as a single lesion, but multiple lesions are not uncommon. Roentgenographically, the lesions are lytic, sclerotic or mixed, but in the majority there is some degree of sclerosis. No specific etiologic agent is known, but it is postulated that the reaction may be associated with a variety of organisms of low-grade virulence. Certain organisms have long been known to produce predominantly plasmacytic infiltrate, notably spirochetes, mycobacteria and some exotic viruses. It is most important, however, that this entity, plasma-cell granuloma, be distinguished from multiple myeloma so those potentially life-threatening chemotherapeutic agents are not prescribed. Histologically, aggregates of chronic inflammatory cells are intermingled with the meets of plasma cells, and note the markedly thickened bone trabeculae in surrounding bone. We experienced a case of plasma-cell granuloma of right 7th. rib, occurring in 32 year old male and reported it with review of literatures.