• Journal of the Society of Naval Architects of Korea
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• v.30 no.4
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• pp.127-135
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• 1993

The ultimate strength formulas of ship panels are suggested in a simple and suitable form. Firstly, these formulas are derived from a full description of the variables that govern plate strength by using statistical data of actual ships. Secondly, under the assumption of plate mid-edge collapse using the Von-Mises' yield criterion and the new buckling formula, a general equation for the ultimate strength estimation is also derived. The existing test data are compared with these new formulas and a good correlation is shown.

• The Journal of the Korean bone and joint tumor society
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• v.13 no.2
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• pp.113-118
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• 2007

Surgical treatment of pelvic bone tumors represent one of the most complicated problem in musculoskeletal oncology. Because of three dimensional anatomy of the pelvis, tumors reach huge sizes and the diagnosed late relatively to a similar tumors in extremity. Especially, there are limited reconstruction methods to keep the function of hip joint after resection of periacetabular tumors, and the results of reconstruction is not so promissing. We present one case of periacetabular metastatic tumor from renal cell carcinoma, which was resected with wide margin and reconstructed with composite of pasteurized autogenous bone graft and constrained total hip arthroplasty.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1978.06a
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• pp.7.3-7
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• 1978

Adenoid cystic carcinoma that is found most frequently in the salivary gland is an extremely rare malignant tumor in middle ear and is a slow growing one with a characteristic tendency of recurrence after surgical removal. Recently we experienced a case of this rare adenoid cystic carcinoma arising from middle ear of 30 year old male patient. The patient complained of hearing impairment for two years duration and pulsating tinnitus for two weeks duration in the right ear. Under the local anesthesia, throgh exploratory tympanotomy, a grayish white mass measuring $1.5\times$1.5$\times$1mm in the hypotympanic portion was removed out and a adenoid cystic carcinoma was verified histopathologically.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1993.05a
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• pp.87-87
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• 1993

Polymerase chain reaction is widely used as a powerful tool in modern molecular biology. As there is agreement that the HPV is an important factor in the head and neck cancers, the detection of HPV DNA sequence in the head and neck cancer tissue has been tried in several ways. We used the PCR to detect the E1 open reading frames of the HPV in paraffin-embedded tissue of the patients with the head neck cancers. Eleven of the fifty-four tested samples (30%) showed positive result. We have analysed the clinical courses and characteristics related with Human Papillomavirus in those patients.

• Journal of the Korean Society for Library and Information Science
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• v.44 no.3
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• pp.137-154
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• 2010

The purpose of this study is to examine the tendency of open access income models in gratis open access journals and fee-based online journals in Korea. This study found that there was no clear difference between two groups and fee-based online journals had several of the same characteristics of open access journals. That is, the societies published fee-based journals have requested APC to authors and additional page charges for the articles with research funding. Also, in case of fee-based online journals, the journals received subsidies from external funding agencies were more than free OA journals. These findings show that fee-based online journals in Korea have a lot of capability to transition to open access journals.

• 월간산업보건
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• s.62
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• pp.17-23
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• 1993

산업보건 역학의 연구결과를 우리가 어느정도로 신뢰할 수 있는지, 또는 어느정도의 정보를 제공할 수 있을지를 결정하는 요인들 중에서 중요한 것으로 간주할 수 있는 것은, 측정된 폭로자료(Exposure data)가 어느정도인지(amount), 얼마만큼 구체적이며(specificity) 그리고 얼마만큼 정확한지(precision)에 관한 것이다. 이상적으로는 우리는 각 개인개인의 폭로량을 구하고 이에 관련된 질병발생의 정도를 측정하고자 한다. 이러한 연구야말로 다른 폭로에 대하여도 일반화할 수 있는 양-반응관계를 추정하게 할 것이다. 그러나 실제로는 측정된 폭로자료를 구하기가 어렵거나 또는 아예 이러한 자료가 존재하지 않는 경우가 흔한데 왜냐하면 기술적으로 제약(특정한 물질에 대한 분석이 아직 불가능하거나)이 있거나 부족한 인적 및 물적 자원때문이다. 그러므로, 대부분의 경우에 폭로수준은 이러한 직접적인 폭로 측정자료 대신에 다른 자료로 부터 간접적으로 알아내야 한다. 이 글은 작업장 환경의 특성을 파악하는 것에 대한 개념 및 몇가지 방법 및 토의할 만한 사항을 요약한 것이다. 이들 중에서 가장 중요하게 다루게 될 사항은 아무래도 작업장에서 근로자 폭로이 강도(intensity)와 기간(duration)을 추정하는 것이 될 것이다. 이에 더하여 (예를 들어 병원환자에 대하여 환자-대조군 연구를 행하는 경우와 같이) 지역사회 연구(community studies) 또는 등록자료를 기초로 한 연구(registry-based studies)에 대한 직업적 폭로의 평가에 대하여도 간략하게 언급하도록 하겠다. - 저자 주 -

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.8
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• pp.26-30
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• 2008

The simulation and experiment for the fault current limiting characteristics of the superconducting fault current limiter (SFCL) using the magnetic coupling of series connected two coils were performed. The magnetic fluxes generated from two coils were canceled out during a normal time. However, the resistance generation of high-Tc superconducting (HTSC) element after a fault occurrence allows the magnetic fluxes of two coils and contributes to the fault current limiting operation. Through the computer simulation and the current limiting experiment for this SFCL, the operational current and the limiting impedance of the SFCL could be confirmed to be improved by adjusting the inductance ratio of two coils.

• Journal of Broadcast Engineering
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• v.8 no.2
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• pp.116-125
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• 2003

In this paper, we introduce a newly developed DSP module and Software which Is applicable to DTV-OCR and is designed to cancel the interference signal. In general, RF repeater has problems of system oscillation and signal Quality degradation due to feedback interference signal coming from transmit antenna. In this paper, we demonstrate newly developed DSP HW and SW module for cancelling the interference signal by investigating the field data measured through a RF repeater. Also, the structure and signal processing method for non-regenerative repeater system based on the newly developed DSP HW and SW module is illustrated as well.

• Journal of Chest Surgery
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• v.30 no.6
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• pp.631-635
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• 1997

혈관에서 기원되는 종양은 혈관외피 세포로부터 발생되는 종양 혈관외피종과 glomus tumor)관 혈관내피 세포로부터 발생되는 종양(를상피 혈관내피종)의 두가지로 구분된다. 이들은 매우 드물게 발생되며 악성종양의 특성을 가지고 있는데, 폐에서 발생된 경우에는 무증상의 작은 종괴로부터 증상이 있는 커다란 종양 의 형태로 나타난다. 최근 저자들은 단일성의 유상피 혈관내피종과 혈관외피종 각각 1례를 치험하였기에 문헌고찰과 함께 보 고하는 바이다. a Tumors of vascular origin are subdivided into two groups: those composed of pericytes (hemangiopericytoma and glomus tumor), and those composed of endothelial cells(hemangioendothelioma). They are uncommon, potentially malignant tumors, and in the lung, the tumors may present as a small asymptomatic nodule or a large symptomatic lesion. Recently we experienced two cases of solitary pulmonary vascular tumors(epithelioid hemangioendothelioma and hemangiopericytoma), and reviewed them with references.

• Journal of Biomedical Engineering Research
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• v.20 no.5
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• pp.587-592
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• 1999

압력측정시스템은 입각기동안 동적압력분포를 성공적으로 측정할 수 있으나 하중수용기-중간입각기, 말기입각기-전유각기의 전환기들에 대해서는 운동분석시스템을 사용하지않고는 정확한 정의가 불가능하다. 따라서 저자들은 수평자유보행 시 압력중심의 이동을 이해하기 위해서 정상적인 발을 가진 20-30대 성인남자 78명을 대상으로 동작분석과발바닥 압력측정을 동시에 수행하였다. 결과로 하중반응기-중간입각기 전환시기의 발바닥 압력중심점은 후족부와 중족부의 경계선에서 앞쪽으로 1.9$\pm$1.5frame(32$\pm$24msec)에 위치하였으며 말기입각기-전유각기 전환시기에는 중족골두 최대 압력점의 앞쪽으로 2.3$\pm$2.0 frame(38$\pm$33msec)에 위치하였다. 정상수평보행에 있어서 최초접지 순간 압력중심은 전방으로 빠르게 이동하다가 바로 급속히 감소하여 하중반응기-중간입각기의 전환시기에는 작은 속도로 이동하였다. 압력중심의 이동속도는 그 후 다시 서서히 증가하다가 전체 보행주기의 25% 전후에서 서서히 감소하여 비교적 일정하다가 말기입각기-전유각기의 전환시점에서 다시 급격한 증가를 보였다. 족부질환과 보행특성을 판단하는데 있어서 압력중심의 이동궤적은 매우 유용한 인자가 될 것으로 기대된다. 본 연구를 통해서 압력측정시스템만으로는 정의할 수 없었던 두 전환기인 하중반응기-중간입각기, 말기입각기-전유각기를 결정할 수있게 되었다.