Effects of I- and W-Phases Under Identical Conditions on Microstructure and Mechanical Properties of As-Cast Mg–Zn–Y Alloys at Room and Elevated Temperatures

Young‑Gil Jung,Wonseok Yang,Jae Ik Hyun,Shae K. Kim,Hyunkyu Lim,Do Hyang Kim 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.12

Three alloys (Mg–6Zn–1.2Y, Alloy I; Mg–3.65Zn–1.65Y, Alloy II; and Mg–4.3Zn–1.4Y, Alloy III) with same volume fractionand grain size were designed to evaluate the effects of the I-phase (Mg3Zn6Y) and W-phase (Mg3Zn3Y2), which are themajor phases in Mg–Zn–Y alloys, on the mechanical properties. The tensile strength of Alloy I with the I-phase at roomtemperature was the highest among the tested alloys because the coherent interface between the I-phase and the α-Mg phasewas more resistant to cracking than the incoherent interface between the W-phase and the α-Mg phase. A cross-sectionalmicrostructure analysis of a sample that was tensile-tested at 423 K revealed that the morphology of the I-phase remainedrelatively stable. In contrast, the W-phase was broken and fragmented during the tensile test at 423 K because it had higherbrittleness under the test conditions. Therefore, the tensile and creep properties of Alloy I at 423 K were better than thoseof Alloys II and III containing the W-phase. According to the results, the I-phase in the Mg-Zn-Y alloy was more beneficialto the mechanical properties at room temperature and 423 K than the W-phase.

편광현미경에 의한 형태와 구성성분에 의한 토양의 비교분석에 관한연구(Ⅱ)

김은호,김재균,김명덕,신윤열,장성길,박성우,김영만 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-

창세로부터 비유속에 감추인 성경의 비밀표현II

김영길 부산대 예술대학 1996 藝術論文集 Vol.11 No.-

I will utter things which have been kept secret from the foundation of the world Kim Young Gil. All there things Jesus spoke to the mutitude in parables: and without a parable he did not speak to them, that it might be fulfilled which have spoken vy the prophet, saying, "I will open my mouth in parables; I will utter things which have been keep secret from the foundation of the world" "Son of man, pore a riddle, and speak a parable to the house of israel. The mystery which has been hidden from ages and from generations, but now has been revealed to his saints. I will open my mouth in parable ; I will utter dark saying of old. Which we have heard and known. And our fathers have fold us. We will not hide them from their children. Telling to the generation to come the praises of the lord. And his wonderful work that he has done. How that by revelation he made known to me the mystery (as I wrote before in a few words, by which, when you read, you many understand my knowledge in the mystery of christ.) However, we speak the wisdom among thore who are mature. Yet not the wisdom of this age, nor of the rules of this age, who are coming to nothing, but we speak the wisdom of God in a mystery, the hidden wisdom which God ordained before the age know ; for had they known, they would not have cruciffied the lord of glory, but as it is written ; Eye has not seen, nor ear heard, nor have entered into the heart of man. The things which God has prepared for those who love him. But God has reveaied them to us through his spirit. For the spirit searches all things, yes, the deep things of God, For what man known the things of a man except the spirit of the man which is in him? Even so no one knows the things of God except the spirit of God. Now we have received, not the spirit of the world, but the spirit who is from God, that we might know the things that have been freely given to us by God. These things we also speak, not in words which man's wisdom teaches but which the holy spirit teaches, comparing spiritual things which spiritual. But the natual man dose not receive the things of the spirit of God, for they are foolishness to him ; nor can he know them, because they are spiritually discernd, but he who is spiritual judges all things, yet he himself is rightly judged by no one. For "who has known the mind of the lord that he may instruct him?" but we have the mind of christ. "I have also spoken by the prdphets, And have multiplied vision ; I have given symbols thouth the witness of the prophets." Because it has been given to you to know the mysteries of the kingdom of heaven, but to them it has not been given. For whoever has to him more will be given and he will have abundance ; but whoever does not have even what he will be taken away from him. Therefore I speak to them in parables because seeing they do not see, and hearing they do not hear, nor do they, nor do they understand. And in them the prophecy of isaiah is fulfilled which say ; Hearing you will see and shall not understand. And seeing you will see and not perceive ; For the heart of this people has grown dull. Their ears are hard of hearing. And their eyes, they have clored. Lost they should see with their eyes and hear with their ears. Lost they should understand with their heart and turn. So that I should heal them. (Isaiah 6;9~10) Hear, you deaf ; and look, you blind, that you may see. who is blind but my servant, or deaf as my messenger whom I send? Who is blind as he who is perfect, and blind as the lord'sservent? seeing many things but you do not observer ; opening the ears but he dose not hear. The lord is well pleased for his righteousness'sake ; He will magnify the make it honorble. but this is a people robbed and plum plundered ; All of them are snared in holes. And they are hidden in prison houers ; they are for prey, and no one delivers ; For plunder, and no one says, "Restore"

日本 自然科學分野 學術硏究 動向 調査硏究

金漢洙,洪翰植,金完鎬,金源,李永吉,徐英淑 경북대학교 1981 새마을 硏究論叢 Vol.1 No.-

韓國人의 各 臟器組織中 靑酸鹽의 微量分布에 關한 硏究(Ⅱ)

張成吉,金恩浩,金英雲,李鎭勳,柳在薰,權五星,金明德,吳世珍,金由那 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-

혼합형 자가면역성용혈성빈혈과 동반된 Evans 증후군 1례

선길홍,윤찬영,박상곤,박경희,우정주,한경택,김진화,김영훈,정춘해,박치영 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.2

Evans syndrome is defined as a simultaneous or sequential occurrence of autoimmune hemolytic anemia and autoimmune thrombocytopenia. Autoimmune hemolytic anemia (AIHA) is usually induced by IgG warm autoantibody or cold-active IgM antibodies reacting specifically with antigens associated with a patient's RBC. AIHA is a fairly uncommon disorder, with estimates of the incidence at 1 to 3 cases per 100,000 per year. Mixed-type AIHA is a relatively uncommon form of AIHA, with studies noting the incidence of 7-8% among cases of AIHA. We experienced a patient, 46-year-old woman who was diagnosed having a very rare clinical presentation of mixed warm and cold antibody mediated Evans syndrome. She was treated with corticosteroid therapy only and has been maintaining a complete response for 15 weeks. 저자들은 혼합형의 자가면역성 용혈성 빈혈과 자가면역성 혈소판 감소증이 동시에 발생한 혼합형 Evans 증후군으로 진단하고 스테로이드 요법 후 혈액학적으로 회복된 상태로 15주가 지난 현재 steroid 5 mg/일 까지 감량한 상태에서 추적 관찰 치료중인 46세 여자 환자를 경험하였기에 문헌 고찰과 함께 보고하는 바이다.

배관결함 검출을 위한 자왜형 초음파 센서의 특성

안봉영,김영주,김영길,이승석 한국비파괴검사학회 2000 한국비파괴검사학회지 Vol.20 No.1

석유화학 설비 등과 같은 노출 배관의 결함을 검출하는데 효율적으로 이용될 수 있는 자왜형 초음파 센서를 제작하였다. 최대의 초음파 발생 효율을 얻기 위한 최적 조건을 설정하였으며, 실험에 사용된 배관의 경우 250~350Oe의 정자기장이 최적이었으며, 180kHz의 주파수를 갖는 초음파를 발생시키기 위해서는 15mm 폭의 코일을 사용하는 것이 가장 좋았다. 최적의 조건에서 발생된 초음파는 50m 이상을 충분히 진행할 수 있으며, 결함의 단면적이 증가함에 따라 수신된 결함 신호는 직선적으로 증가함을 확인하였다. Magnetostrictive sensors which can be used effectively to detect flaws in pipe were fabricated. The optimal conditions to obtain the maximum generation efficiency of the ultrasonic wave were established. In case of the used steel pipe the optimal magnetic field was 250~350Oe and the coil width of 15mm showed the best efficiency for generating a wave with the frequency of 180 kHz. In the best condition, the wave can propagate further than 50m without serious attenuation. The amplitude of the ultrasonic wave reflected from artificial flaw had a good linear relationship to the cross-sectional area of the flaw.

기타포괄손익이 재무분석가 이익예측특성에 미치는 영향에 관한 연구

김영길(Kim Young-gil),김성혜(Kim Sung-hye) 한국국제회계학회 2018 국제회계연구 Vol.0 No.81

본 연구는 기타포괄손익의 크기가 재무분석가 이익예측오차 및 이익예측분산에 미치는 영향에 대해 살펴보았다. 특히 K-IFRS 도입 전후로 연구기간을 설정함으로써 기타포괄손익 정보가 재무제표의 본문에 보고되기 이전과 이후를 비교분석하였다. 실증분석 결과는 다음과 같다. 첫째, 전체표본을 대상으로 분석한 결과 기타포괄손익의 크기가 이익예측오차에 미치는 유의한 영향을 관찰할 수 없었지만 이익예측분산에는 유의한 양(+)의 영향을 미치는 것으로 나타났다. 둘째, K-IFRS 도입 이전 표본을 대상으로 분석한 경우 재무분석가 이익예측오차와 이익예측분산 모두 기타포괄손익의 크기와 유의한 상관관계가 없다는 결과를 보고하였다. 마지막으로 K-IFRS 도입 이후의 표본으로 살펴본 결과는 이와 상반되게 기타포괄손익 크기가 커질수록 이익예측오차와 이익예측분산이 증가하는 것으로 나타났다. 즉, 기타포괄손익 정보가 자본시장에 제공되고 있지만 정보환경의 개선이 이루어지지는 못했고, K-IFRS 도입 이후에는 오히려 기타포괄손익 정보가 불확실성을 증가시키고 있는 것으로 보인다. 따라서 본 연구의 실증결과는 기타포괄손익 정보를 제공하는 입장에서 정보이용자의 이해를 돕기 위해 개선할 점을 고민할 필요가 있고, 기타포괄손익 정보를 해석하는 입장에서도 해당 정보를 충분히 활용하기 위한 노력이 필요하다는 점을 시사하고 있다. This study examines the effect of the size of other comprehensive income(OCI) on analysts’earnings forecast accuracy and earnings forecast dispersion. In particular, the research period was established before and after the introduction of K-IFRS to compare OCI information before and after it was reported in the body of the financial statements. The results of the empirical analysis are as follows. First, an analysis of the entire sample showed that although the size of OCI could not be observed to have a significant effect on earnings forecast accuracy, there is a significant effect on earnings forecast dispersion. Second, if an analysis was conducted on a sample prior to the introduction of K-IFRS, both the earnings forecast accuracy and the earnings forecast dispersion were not significantly related to the size of OCI. Finally, the results of the sample after the introduction of K-IFRS showed that, in contrast, the greater the size of OCI, the greater earnings forecast error and earnings forecast dispersion. In other words, although OCI information is provided in the capital market, no improvement in the information environment has been made, and it seems that information in OCI increases uncertainty after the introduction of K-IFRS. Consequently, the results of this study suggest that an entity needs to consider improvements in the context of providing implication in OCI and that it needs to make full use of that information from the perspective of interpreting it.

Effect of Ultrasonic Melt Treatment on Solidification Microstructure of Al–5Ti–1B Alloy Containing Numerous Inoculant Particles

Soo‑Bae Kim,Jae‑Gil Jung,Young‑Hee Cho,Su‑Hyeon Kim,Kwangjun Euh,Jung‑Moo Lee 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7

The effect of ultrasonic melt treatment (UST) on the solidification microstructure of an Al–5Ti–1B alloy containing highvolumefractions of Al3Tiand TiB2particles is investigated for various UST times with different melt holding times. Theas-cast Al–5Ti–1B alloy is composed of TiB2and polygonal Al3Tiparticles (present prior to UST), plate-like Al3Tiparticles,and Al grains (formed during UST and/or solidification). The UST causes a size reduction and homogeneous distributionof the TiB2-agglomerated region containing many submicron-sized TiB2particles pushed to the grain boundaries. The USTslightly decreases the size and improves the distribution of polygonal Al3Tiparticles enriched in the TiB2-agglomeratedregion. Unlike the TiB2and polygonal Al3Tiparticles, which exhibit a minor refining effect, the plate-like Al3Tiparticlesshow a significant refinement with UST application. The UST has a significant effect on the size distribution of Al grains byinducing the formation of medium-sized grains at the expense of small and large grains; however, it only has a slight effecton grain refinement. The degree of microstructure modification increases with increasing UST time but decreases with meltholding time after UST. The mechanisms for the refinement and dispersion of the TiB2and Al3Tiparticles and Al grains arediscussed considering fragmentation, nucleation, and growth behaviors induced by the UST and subsequent solidification.

미세혈관 협심증 환자의 임상상 및 지표에 관한 연구

박상호,온영근,김현정,이태훈,길효욱,김현건,박수진,송해정,한대희,방덕원,신원용,이내희,김성구,권영주 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1

Background : Microvascular angina or syndrom X is heterogenous and encompasses different pathogenetic entities. Several studies suggest that microvascular angina have good prognosis and occurs predominantly in postmenopausal women. Lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and fibrinogen are the independent risk factor of acute coronary syndrome and are the chief underlying cause of atherosclerosis. We investigated clinical characteristics and markers in patients with microvascular angina. Methods : We studies 23 patients diagnosed with microvascular angina and 16 control group with negative treadmill exercise test and no significant coronary angiogram. We investigated clinical characteristics in patients group and evaluated symptom during a follow-up period of 4.2± 2.5 month. Exercise time in treadmill exercise test was compared between patients and control group. We assessed the level of markers, such as lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and ESR in two groups. Results : There is no difference in age between two groups. Patients group had a tendency to increase in female, hypertension, DM, and smoking history, but there was no statistical significance difference. Exercise duration time was significantly decreased in patients with microvascular angina (p<0,05). Serum lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholestrol, Triglyceride, ESR, Fibrinogen and Homocystein value were no significant difference between microvascular angina and control group. Only CRP was significantly high in patients with microvascular angina (p<0.05). Conclusion : There was no statistical significance difference in age, sex, hypertension, DM and smoking history between two groups but patients group had a tendency to increase the prevalence in hypertension, DM and smoking history, female. Also, Symptom improvement and disappearance in follow-up was presented in 11 patients of 19(57.9%). Exercise tolerance was worse in patients group than control group. CRP value was significantly higher in patients group than control group. There was no statistical significance difference in lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, ESR and Fibrinogen between two groups.