폐주불사를 혼입한 콘크리트의 내구성에 관한 연구

김태경,박정호,이정호,이주형,박제선,김연경,윤경구 강원대학교 석재복합신소재제품연구센터 1998 석재연 논문집 Vol.3 No.-

콘크리트 구조물은 자연적인 혹은 인위적인 온도의 상승, 강하로 인하여 동결-융해 작용을 받게 되어 구조물의 성능저하를 야기시킨다. 현대에 들어서면서 콘크리트의 내구특성을 파악하기 위한 연구적 요구가 증가되고 있다. 따라서 폐주물사 콘크리트를 실제 구조물에 적용하기 위해서는 내구특성에 대한 연구가 반드시 이루어져야 한다. 폐주물사를 혼입한 콘크리트의 내구특성을 파악하기 위한 동결-융해 실험은 폐주물사의 잔골재 치환율, 물-시멘트비, AE제 사용 여부를 주요 변수로 하여 실시하였다. 원형공시체를 제작하여, 동결-융해 시험기에 넣어 -18∼4℃로 급속 동결-융해를 진행시키면서 매 23싸이클마다 동탄성계수를 측정하였다. 실험결과 AE제를 첨가했을 때 물-시멘트비가 적을수록, 폐주물사의 치환율이 클수록 전반적으로 강도가 증가하는 것으로 나타났으며, 물-시멘트비가 증가함에 따라, AE제를 사용한 콘크리트가 동결-융해 저항성이 증가하는 것으로 나타났다. 특히 폐주물사 치환율이 50%일 때가 동결-융해 저항성이 가장 좋은 것으로 나타났으며 그 다음으로 25, 0% 순으로 저항성이 좋은 것으로 나타났다. 따라서 폐주물사 콘크리트가 내구성이 우수한 것으로 나타나 폐주물사를 콘크리트에 재활용 할 수 있는 것으로 나타났다. Concrete structures has been deteriorated by the freezing and thawing due to temperature gap. This study was conducted to evaluate durability of concrete which are increasingly demanded recently. Therefore the research of durability must be executed for application of waste foundry sand concrete real structures. Concrete durability properties incorporating waste foundry sand was performed with the variable of W/C ratio, Sand/Waste foundry sand ratio and Air entrainment-Non air entrainment. Cylinder specimens were made and subjected to freezing and thawing cycle at -18℃ and 4℃. Dynamic modulus of elasticity were evaluated as F/T cycle increase. The results show that strength of concrete is increased the W/C ratio decrease, the Sand/Waste foundry sand ratio increase when the concrete contains AE agent and decreasing W/C ratio and AE concrete makes improved resistance of freezing and thawing improved. Especially, resistance of freezing and thawing is improved by Fine aggregate/Waste foundry sand ratio which is 50%, 25%, 0% in a row. Therefore it is turn out the waste foundry sand could be applied to concrete from the experiment.

쉬운 뉴스 nachrichtenleicht의 외국어 교육적 활용 방안 - 독일어 번역 및 문화 교육을 중심으로

김경 ( Kim¸ Kyong ) 한국독일어문학회 2021 독일어문학 Vol.94 No.-

독일에서는 기본법, 공공 기관 문서, 뉴스 등을 ‘쉬운 언어, 단순한 언어’로 표기하도록 권장한다. 이를 통해 시민들의 알 권리를 보장하고, 시민들이 사회 문제에 자신의 의견을 피력할 수 있도록 장려하고 있다. 이 논문의 목적은 '단순한 언어'의 언어적 특징을 살펴보고, 이 언어로 제작한 뉴스 nachrichtenleicht의 기사와 용어사전을 독일어 교육에 적용하는 방법을 모색하는 것이다. 또한 구글 번역기와 자신의 번역을 비교함으로써 학생들이 번역 작업에 용기를 갖도록 하고, 번역 수정본을 공유하여 학생들의 오류를 확인시킨다. 마지막으로 번역 결과물을 먼저 < PNU 독일어 학습사전 >에 탑재하고 궁극적으로는 네이버 독일어사전의 용례 및 백과사전 정보의 보강에 활용한다. 학생들의 nachrichtenleicht 뉴스 기사 및 용어사전 번역 과제를 분석하고, 번역 오류의 구체적인 유형에 대해서도 숙고한다. 두 가지의 번역 결과물 중에서 특히 용어사전의 번역은 독일 문화 및 지역학 관련 교육자료로 활용할 수 있음을 확인하였다. 네이버 독일어사전에서 이미 제공 중인 <라이프니츠-독일어연구소 신조어사전>의 백과사전 정보가 전문적, 체계적인 반면 nachrichtenleicht의 용어사전은 훨씬 평이한 수준으로 기존 자료의 쉬운 대안이 될 것이다. In Deutschland wird empfohlen, das Grundgesetz, Dokumente öffentlicher Einrichtungen, Nachrichten etc. in ‘leichter, einfacher Sprache’ abzufassen. Dadurch wird das Recht der Bürger auf Information gewährleistet und die Bürger werden ermutigt, ihre Meinung zu sozialen Fragen zu äußern. Das Ziel dieser Arbeit ist es, die sprachlichen Eigenschaften der ‘einfachen Sprache’ zu betrachten und die in dieser Sprache erstellten Artikel und das Glossar von nachrichtenleicht auf den Deutschunterricht anzuwenden. Außerdem werden die Studenten durch den Vergleich ihrer eigenen Übersetzungen mit dem Google Übersetzer ermutigt, an ihren Übersetzungen zu arbeiten. Durch das Teilen von Übersetzungskorrekturen können die Studenten Fehler feststellen. Schließlich wird das Übersetzungsergebnis zunächst in das < PNU Deutsches Lernerwörterbuch > geladen und schließlich verwendet, um die Verwendungsbeispiele und enzyklopädischen Angaben des Naver Deutschen Wörterbuches zu verstärken. Die Übersetzungsaufgaben von Studenten, d.h. die Übersetzungen der Nachrichtenartikel und Glossare von nachrichtenleicht, werden analysiert und konkrete Typen von Übersetzungsfehlern ermittelt. Anhand der beiden Übersetzungsergebnissen wurde bestätigt, dass insbesondere die Übersetzung des Glossars als Unterrichtsmaterial zur deutschen Kultur und Landeskunde verwendet werden kann. Während die enzyklopädischen Angaben des Neologismuswörterbuchs des Leibniz-Deutschen Instituts, die bereits von Naver Deutsches Wörterbuch bereitgestellt werden, professionell und systematisch sind, hat das Glossar von nachrichtenleicht ein viel einfacheres Niveau und kann eine einfache Alternative zu bestehenden Daten sein.

Perceptions and Functions of Korean Mianhada : Comparison with American English Sorry

Yu. Kyong-Ae 한국사회언어학회 2017 사회언어학 Vol.25 No.2

Yu, Kyong-Ae. 2017. “Perceptions and Functions of Korean Mianhada : Comparison with American English Sorry ”. The Sociolingusitc Journal of Korea 25(2), 197~224. Sociopragmatic and pragmalinguistic conventions for apology vary from culture to culture. While the illocutionary purpose of apologizing in English is “the speaker s sense of social obligation” (Wierzbicka 1987: 215~217) and Japanese sumimasen involves “social-self with a social alter” (Ide 1998: 524), this study argues that Korean mianhada is an apology from the speaker s moral perspective linked with collective-self. Employing Wierzbicka s (1987) Natural Semantic Metalanguage, this study discusses that sorry is a separate concept but mianhada is a nebulous concept mixed with other emotions, e.g., thank and love . In addition, presenting the examples from corpus-based dictionaries, COCA, and the Sejong 21 st Century Corpus, this study discusses that sorry is authentically used as indirect and ritualistic apologies while mianhada is used as direct, indirect, ritualistic and substantive apologies. Finally, distinguishing main functions of mianhada into a sincere apology, a pseudo-apology, gratitude, a request initiator, a preclosing signal, and a territory invasion signal to strangers, this study provides cultural and ethnographical explanations.

Gene cloning and utility phophorylation assay of a protein-fused substrate for a highly sensitive detection of cdc2 protein kinase using a radioisotope detection technique for the development of a protein biochip

Ko, Kyong-Cheol,Choi, Mi Hee,Park, Sang Hyun John Wiley Sons, Ltd. 2009 Journal of labelled compounds & radiopharmaceutica Vol.52 No.4

<P>The prototype of the cdc2 protein kinase in mammalian cells regulates its entry into mitosis by phosphorylating a group of key proteins in the major cell cycle transitions. In this study, using the mep45 gene encoding the 45 kDa major envelope protein (Mep45) of Selenomonas ruminantium, a rumen bacteria, a Mep45-fused substrate (PKTPKKAKKL-Mep45, MFS-cdc2) was cloned to detect the activity of cdc2 protein kinase. We report here on a strategy for the detection of a phosphorylation of a substrate catalyzed by cdc2 protein kinase by using a radioisotope detection technique. It is possible to constantly obtain a reasonable quantity of MFS-cdc2 for the cdc2 protein kinase assay and its cost can be as low as a synthesized peptide. Results of the study indicate that the Mep45-fused protein can be used effectively as a substrate for detecting the activity of cdc2 protein kinase and it can be used in developing a protein biochip for a high-throughput screening and also for studying protein–protein interactions. Copyright © 2009 John Wiley & Sons, Ltd.</P> <B>Graphic Abstract</B> <P>Gene cloning and utility phophorylation assay of a protein-fused substrate for a highly sensitive detection of cdc2 protein kinase using a radioisotope detection technique for the development of a protein biochip Kyong-Cheol Ko, Mi Hee Choi, Sang Hyun Park<SUP>*</SUP>Using the mep45 gene encoding the 45 kDa major envelope protein (Mep45) of Selenomonas ruminantium, a rumen bacteria, a Mep45-fused substrate (PKTPKKAKKL-Mep45, MFS-cdc2) was cloned to detect the activity of cdc2 protein kinase. We report here on a strategy for the detection of a phosphorylation of a substrate catalyzed by cdc2 protein kinase by using a radioisotope detection technique. Copyright © 2009 John Wiley & Sons, Ltd. <img src='wiley_img/03624803-2009-52-4-JLCR1579-gra001.gif' alt='wiley_img/03624803-2009-52-4-JLCR1579-gra001'> </P>

京畿道의 石造美術에 대한 考察

朴慶植 한국문화사학회 1998 文化史學 Vol.- No.9

라덱스 혼입률에 따른 철근콘크리트의 휨파괴 거동특성

정원경,김동호,이주형,임홍범,윤경구 江原大學校 産業技術硏究所 2002 産業技術硏究 Vol.22 No.A

Reinforced concrete(R/C) is commonly used to structures because they have many merits that compressive strength, economy and so on. However, reinforced concrete has a crack at the tensile section which is due to the relatively lower tensile strength than its compressive strength. Latex modified concrete(LMC) has higher tensile and flexural strength than the ordinary portland cement, due to the interconnections of hydrated cement and aggregates by a film of latex particles. The purpose of this study was to investigate the flexural behavior of reinforced concrete beam with latex modified concrete, having the main experimental variables such as concrete types(ordinary portland cement concrete, latex modified concrete), latex contents(0%, 15%), flexural steel ratios(0.012, 0.0235), and with/without shear reinforcement. The beam of LMC showed considerably higher initial cracking loads and ductility than that of OPC, but, similar to ultimate strength and deflection. This might be attributed to the interlocking of hydrated cement and aggregates by a film of latex particles, water retention due to hydrophobic, and colloidal properties of the latexes resulting in reduced water evaporation. The beam with latex modified concrete could be adopted at field for controlling and reducing the tensile crack due to its higher tensile strength.

VES-LMC 덧씌우기를 이용한 콘크리트 포장 보수

정원경,김용곤,김기헌,윤경구 강원대학교 산업기술연구소 2005 産業技術硏究 Vol.25 No.B

Since in 1970, the length of concrete pavements(JCP, JRCP and CRCP) are growing rapidly at both of main highways and local roads. Many of them are deteriorated and old enough to be repaired or replaced. The pavement is more important than the other infrastructures and it is very difficult to go around or block the traffic during the rehabilitation. The very-early strength latex-modified concrete(VES-LMC)may offer the advantages of high-early-strength, higher flexural strength, higher bond strength, and improved durability. The VES-LMC could be used at a kind of fast track ofr early opening to the traffic after 3 hours of concrete placement. The installation of VES-LMC overlay at Jung-Boo highway was successfully done from April 28 to 29, 2005. The traffic was closed at 07:00 PM and opened to traffic at 08:30 AM. The compressive and flexural strength of VES-MC were more than 28MPa, 6.2MPa after 4 hours, respectively.

다시 태어나도 아악의 길로(1) : 관제 성경린선생님의 회고록

성경린 한국음악사학회 1996 韓國音樂史學報 Vol.17 No.1

콘크리트 鋪裝의 初期計測을 통한 初期擧動 特性分析

정원경,김동호,권혁찬,윤경구 강원대학교 산업기술연구소 2003 産業技術硏究 Vol.23 No.A

The purpose of this paper is to analysis of initial behavior of concrete pavement with initial measurement strain gauge for concrete pavement at field, and to investigate the field test results for field applicability testing. The early-age behaviors of concrete pavement slabs were measured using the strain gauges. From the slab depths and positions, the outputs from each gauges were recorded at initial curing period The initial measurement of concrete pavement and check of crack at the joint were performed. the results could be summarized as follows. From the results of concrete strength, compressive strength and flexural strength were showed 271kgf/㎝', 43kgf/㎝' respectively. From the tests of early-age strain measurement, it was found that the strain varied at the maximum value of 150μ ε and early1 behavior of concrete slab was showed a tensile strain However. for long-term was showed a compressive strain due to dry-shrinkage.

淸潭 李重煥의 歷史認識과 國防地理論

芮庚熙,金在漢 청주대학교 학술연구소 2007 淸大學術論集 Vol.9 No.-

The purpose of this paper is to clarify the historical consciousness and military geography of Yi Chung-Hwan's Taengniji. To achieve the purpose, the historical consciousness and national defense geography of Yi Chung-Hwan in Taengniji is analysed. The results of research are as below: 1. Yi Chung-Hwan had the historical consciousness, considering Chosun dynasty as a barbarian country in east Asian periphery and adhering toadyism to the Ming dynasty. Many gentlemen, including Yi Chung-Hwan, had such consciousness at that time of Chosun dynasty. Nevertheless Yi Chung-Hwan can be regarded as a scholar of military geography as well as a great thinker of the Chosun and Chinese dynasty. 2. Yi Chung-Hwan had considered the following places/regions as strategically significant for the national defense: (1) The Chul-Rung in Pyong An Province, Javi-Rung and Guwall Mountain in Hwang Hae Province. (2) The mountain fortresses from Oh-Kwan Mountain to Sung-Gue Mountain, and the long valley of Chun-Suk in Gae-Sung. (3) The chain fortresses along Sa-Hun, Nok-Bun and Buk-Jae and Mun-Su mountain; maritime strategic places such as Im-Jin river port, sea ports of Sung-Chun, Gap-Hwan and Sondol-Mok, Young-Jong island and Dae-Bu island. (4) as well as Chil-Gok mountain fortress and Jo-Rung ridge in Kyong-Sang Province. (5) The Wan-Do island and Bukpajung in Jin-Do island are considered also as strategic points to protect the southern region in Jeul-Ra Province.