熔接構造物等의 熱應力測定에 關한 硏究

李明鎬 서울産業大學校 1980 논문집 Vol.13 No.1

Recently, the thermal stress measurement becomes on issue because the welded elements such as especial boiler, turbine and high pressure vessel of atomic reactor are frequently used and they are worked at high temperature. That is why, in most case, thermal stress is a repeated thermal cycle phenomenon and often forms a cause of the breakage of machines. The present investigation found same relative difficulties in compensating method and adhesive method of the apparent strain value according to temperature by directly adhering high temperature strain gauge to material part at high temperature, 400℃ for the first time. In other words, this study made a comparison between principal value and experimental value of thermal stress for circle hole and round plate as a fundamental experiment. I think that we need mastery and experience for this experiment because there are lots of difficulties for the first time differently from the normal temperature gauge. I got a high good accurate results in this experiment of the thermal stress measurement through this paper.

Mixed Reality Tabletop Gameplay: Social Interaction with a Virtual Human Capable of Physical Influence

이명호,Nahal Norouzi,Gerd Bruder,Pamela Wisniewski,Greg Welch 한국컴퓨터그래픽스학회 2021 한국컴퓨터그래픽스학회 학술대회 Vol.2021 No.7

90Sr, 241Am, 239,240Pu 및 238Pu 동위원소들을 분리하기 위한 축차분리법에 대한 고찰

이명호,송병철,박영재,지광용,김원호 한국방사성폐기물학회 2005 한국방사성폐기물학회 학술논문요약집 Vol.3 No.1

Seam 2.0과 Spring 2.5 프레임워크의 개발 생산성 비교 연구

이명호 한국산업경영시스템학회 2010 한국산업경영시스템학회 학술대회 Vol.2010 No.춘계

This paper proposes a standard open source software development guidance and an evaluation index for the productivity related to Seam 2.0 and Spring 2.5 framework. However, there is no comparison research about the performance of Seam 2.0 and Spring 2.5 framework with same identical platform. Quantitative analysis is supported as a part of LoC analysis. There is a limit to develop the updated software with no the specific evaluating index for the productivity of the software. This work proposes an specific index for evaluating the productivity of Seam 2.0 and Spring 2.5 framework on a platform. Base on the result, the specific guidance of the developing software is obtained.

대스팬 지붕구조물의 등가정적 풍하중 산정에 관한 연구

이명호,김지영,김대영,김상대 한국공간구조학회 2006 한국공간구조학회지 Vol.6 No.1

Gust Factor법은 구조물의 등가정적 풍하중을 평가하는 일반적인 방법으로 구조물의 최대 응답시의 풍하중의 분포가 평균풍하중의 분포와 동일한 형상을 가진다는 가정하에 적용한다. 그러나 대스팬 구조물의 경우 평균 풍하중의 형상과 변동 풍하중의 형상이 다를 수 있어 1차모드뿐 아니라 고차모드의 영향을 고려하여 구조물의 풍응답과 풍하중을 산정하여야 한다. 본 논문에서는 등가정적 풍하중을 산정하기 위하여 현재 사용되고 있는 Gust Factor 법 (GF법), Load-response-correlation법 (LRC법)에 대해 고찰하고, Advanced Conditional Sampling 법 (ACS법)을 제안하였다. ACS법은 최대하중효과를 나타내는 순간에 선택된 풍압분포와 구조물의 동적거동에 의해 발생한 관성력을 합성하여 등가정적풍하중을 산정하는 방법이다. 최대하중 효과는 풍동실험에서 얻어진 풍압데이터를 이용하여 시간이력해석으로 평가한다. 제안된 ACS법과 기존의 GF법 및 LRC법을 지붕 구조물에 적용하여 등가정적 풍하중을 산출하고 이를 상호 비교 분석함으로써 ACS법의 유효성을 검증하고자 한다. The GF(Gust Factor) method is usually used as a method to evaluate equivalent static wind loads for general structures. The GF method is performed on the assumption that the shape of the equivalent static wind load profile is typically similar to that of mean wind loads. The shape of fluctuating wind loads could be quite different with that of the mean wind loads in case of large-span structures. So, the effect of higher modes as well as first mode must be considered to evaluate the wind loads. In this study, the ACS (Advanced Conditional Sampling) method is suggested to evaluate of equivalent static wind loads after investigating about GF and LRC method. The An method ran derive effective static wind loads by combining wind pressures and inertia forces of a structure chosen at a maximum load effect. The maximum load effect is assessed with the time history analysis using pressure data measured in wind tunnel tests. Equivalent static wind loads evaluated using ACS, GF, and LRC methods are compared to verify the effectiveness of ACS method.

The Circumferential Tensile Properties of Zirconium Alloy Fuel Claddings under a Simulated High Burn-Up Environment

이명호,김준환,박상윤,최병권,정용환 대한금속·재료학회 2009 METALS AND MATERIALS International Vol.15 No.4

To study the circumferential tensile properties of fuel claddings under a simulated high burn-up environment, ring tensile tests were carried out at both room temperature and 350 °C for Zr-Nb based fuel claddings such as Zr-Nb based HANA-6 (Zr-1.10Nb-0.05Cu), HANA-4 (Zr-1.50Nb-0.40Sn-0.20Fe-0.10Cr) and Zircaloy-4 (Zr- 1.26Sn-0.23Fe-0.12Cr) cladding after they had been differently charged with hydrogen up to 2,850 ppm. The results showed that the HANA-6 cladding maintained more than a 20% circumferential elongation at room temperature without a decrease in its maximum strength when it was charged with hydrogen up to about 1,500 ppm, although the maximum circumferential strength and elongation of the Zircaloy-4 cladding decreased with increasing hydrogen content above 500 ppm. The circumferential elongation of the above claddings decreased as the hydrogen content increased at both room temperature and 350 °C but the strength increased a little with the hydrogen content at 350 °C. The maximum circumferential strength of the HANA-4 cladding also increased with the hydrogen content up to a level of 1,109 ppm, even at room temperature. It seemed that the Nb in the matrix contributed to better circumferential elongation and resistance to hydrogen embrittlement in the Zr-Nb based HANA-4 and HANA-6 claddings than was present in the Zircaloy-4 cladding. To study the circumferential tensile properties of fuel claddings under a simulated high burn-up environment, ring tensile tests were carried out at both room temperature and 350 °C for Zr-Nb based fuel claddings such as Zr-Nb based HANA-6 (Zr-1.10Nb-0.05Cu), HANA-4 (Zr-1.50Nb-0.40Sn-0.20Fe-0.10Cr) and Zircaloy-4 (Zr- 1.26Sn-0.23Fe-0.12Cr) cladding after they had been differently charged with hydrogen up to 2,850 ppm. The results showed that the HANA-6 cladding maintained more than a 20% circumferential elongation at room temperature without a decrease in its maximum strength when it was charged with hydrogen up to about 1,500 ppm, although the maximum circumferential strength and elongation of the Zircaloy-4 cladding decreased with increasing hydrogen content above 500 ppm. The circumferential elongation of the above claddings decreased as the hydrogen content increased at both room temperature and 350 °C but the strength increased a little with the hydrogen content at 350 °C. The maximum circumferential strength of the HANA-4 cladding also increased with the hydrogen content up to a level of 1,109 ppm, even at room temperature. It seemed that the Nb in the matrix contributed to better circumferential elongation and resistance to hydrogen embrittlement in the Zr-Nb based HANA-4 and HANA-6 claddings than was present in the Zircaloy-4 cladding.

디지털 컨버전스의 전개동향과 정책방향

이명호 에스케이텔레콤 (주) 2006 Telecommunications Review Vol.16 No.1

본 논문은 디지털 컨버전스에 관한 특집을 개과하는 논문으로서 디지털 컨버전스에 관한 올바른 이해와 명확한 성격파악을 목즉으로 작성되었다. 이를 위하여 본 논문에서는 디지털 컨버전스 현상을 통신부문내 컨버전스,통신과방송부분간 커버전스.그리고 이종산업간 컨버전스의 세 가지 부분으로 나누고 각 부분별로 개념과 배경 및 기존연구 동향, 컨버전스 현상의 동향과 전망,컨버전스에 대비한 정책방향등을 개괄적으로 조망하고 있다.

각종 흡착제의 입자도에 따른 흡착력 실험연구

이명호,노명희,이인자 이화여자대학교약학회 1970 梨花藥學硏究 Vol.- No.11

Among the many absorbents used, this experiment selected six standard samples in Korea. The comparative tests for the absorptive powers wit the size of particle of these samples was performed by the Iodine method of Korea Pharmacopeia and the Fischer Subsieve sizer was used to determine the size of particle of the samples. As the result of this experiment, we found that the absorptive power increases as the size of particle decrease for the same samples and for the different ones the absorptive power is not comparative with the size of particle.

FFT알고리즘을 이용한 주기함수의 Parameter Estimation에 관한 연구

이명호 청주대학교 산업과학연구소 1984 産業科學硏究 Vol.2 No.2

Estimating the three parameters of frequency, amplitude, phase of a sinusoid in noise normaly requires two steps. The frequency is first estimated by, for example, the periodograem or maximum entropy techniques and the amplitude and phase are determined via least spuares. Simulation results, together with the deviations for the estimater's statistics, are given.

Latin어의 음성학적 및 음운론적 고찰[Ⅱ]

李明鎬 中央大學校 人文科學硏究所 1995 人文學硏究 Vol.23 No.-

This study of Latin letters and their pronunciations on phonetical and phonological levels is both on the synchronic and diachronic dimensions. Classic Latin, elaborately promoted by the Classic Latin authors under the influences of the Greek civilization, is a written, literary and academic language. On the oral level, this language was polite and social one. In its golden age Classic Latin, though influenced by Greek, assures its proper simplicities and clearness in the letters and the pronunciations. As an elaborate written language, Classic Latin carries lots of important resources, necessary for studies on phonetic and phonological levels. Latin is chronologically delimited in certain characteristic ages: Archaic Latin(BC 6^c~BC First half of 3^c), Preclassic Lt. (BC Second half of 3^c~BC Early 1^c), Classic Lt.(BC Middle of 1^c~AD 14), Postclassic Lt.(AD 15~AB End of 2^c), Late Lt.(AD 200~Fa11 of Roman Empire) which is characteristic of the relation with christiarlity, which is a quasi-official faith in the Empire, consequently also in Romania, and throughout the Middle Age in Western World. Late Latin is the official language in the christianity through which it has been conserved down to date, and it is this Late Latin that has given the basis to the so-called Traditional Latin on which the IPA(international phonetic alphabet) is based. Folowing the fall of the Roman Empire emerged Romanic language(<Lt. lingua Romana(or Romanica)) which gave birth to Neo-latins(Italian, Spanish, French...)-which exterminated the linguistic Homan Empire which that far survived even after the fall of the political Roman Empire. In this study the preponderance is put on Classic Latin, but it is inevitable that Traditional Latin should additionally be dealt, and Neo-latins are referred as far as they are required for references. Both Romanic and Neo-latins furnish this study with very important references in tracing the processes of phonetic and phonologic evolutions in Latin. In Latin, /u/ and /i/(both vowels and semi-vowels or consonants) are very instable phonemes, and especially i has lots of influence on the contiguous sounds, rendering them palatalized. The affricates([t??, d??, ts, dz]) the palatalized 'n'([??]) and the chuintant([??]), all of which appear after Classic Latin, are the results of the influences (assimilational, analogical, or euphonic) related with the i. The above said later born variants in Latin, whether conditioned or non-conditioned, have become parts of the Neo-latin phonemic systems. Meanwhile the [??], when it has very intensive frequency in Latin, is simply a conditioned allophone of /g/ and /n/ (sometimes of /m/), and which after all couldn't assure a position as a phoneme in Neo-latin phonemic systems.