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RISS 인기검색어
- 검색키워드
- 저자 : William Peterson (검색결과 4 건)
- 무료
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PLANNING의 의미에 관한 고찰 ( On Some Meaning of Planning )
William Peterson,유걸 대한건축학회 1966 建築 Vol.10 No.3
도시나 국가경제 같이 복합된 실존물을 성공적으로 청사진상에 계획하기는 어려운 일이다. 이런 복합체를 연역적계획으로 시도하다가는 일원론적인 이론으로 실존을 왜곡시키거나 아니면 유토피아적인 사고로 실제에서 전연 도외된 결과에 이르기 마련이다. 서로 상반되는 혹은 부분적으로 일치되는 대상의 합리화된 취사선택으로 조정되는 귀납법적인 계획은 어원적으로 볼때 planning이 의미하는 것에 정반대의 것이다. 그러나 합리적인 계획을 통하여 우리들의 세계를 이루어 나가려는 기도의 장래는 이런류의 이율배반적인 방법 들을 초극하는데 있다.
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Effect of Slag Grade and Cement Source on the Properties of Concrete
Natalie Peterson Becknell,William Micah Hale 한국콘크리트학회 2011 International Journal of Concrete Structures and M Vol.5 No.2
Presented in the paper are findings of a project that examined the effect of slag grade and cement source on the performance of concrete mixtures. Slag cement contents were 20, 40, and 60 percent of the total cementitious material content. Two grades of slag cement were examined (Gr. 100 and Gr. 120) along with two sources of Type I cement. Compressive strength, durability, and permeability were measured. The results showed that the cement source affected the early age strength of the mixtures. At 28 days of age, mixtures containing Gr. 120 slag cement had higher compressive strengths than mixtures containing Gr. 100 slag cement, but by 90 days of age, the trend reversed. As for the chloride ion penetrability, mixtures cast with Gr. 100 slag cement passed fewer coulombs at 28 and 90 days of age than similar mixtures containing Gr. 120 slag. Mixtures containing Gr. 120 slag had the greatest durability factors.
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Effect of Slag Grade and Cement Source on the Properties of Concrete
Becknell, Natalie Peterson,Hale, William Micah Korea Concrete Institute 2011 International Journal of Concrete Structures and M Vol.5 No.2
Presented in the paper are findings of a project that examined the effect of slag grade and cement source on the performance of concrete mixtures. Slag cement contents were 20, 40, and 60 percent of the total cementitious material content. Two grades of slag cement were examined (Gr. 100 and Gr. 120) along with two sources of Type I cement. Compressive strength, durability, and permeability were measured. The results showed that the cement source affected the early age strength of the mixtures. At 28 days of age, mixtures containing Gr. 120 slag cement had higher compressive strengths than mixtures containing Gr. 100 slag cement, but by 90 days of age, the trend reversed. As for the chloride ion penetrability, mixtures cast with Gr. 100 slag cement passed fewer coulombs at 28 and 90 days of age than similar mixtures containing Gr. 120 slag. Mixtures containing Gr. 120 slag had the greatest durability factors.
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Yooseob Song,William Peterson 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.3
A constitutive model for niobium with the effect of dynamic strain aging is proposed. The crystal structure of metalshugely influences the dynamic strain aging phenomenon and causes considerable alterations in the material’s macroscopicmechanical responses. Dynamic strain aging needs to be accounted for in a constitutive model to obtain accurate predictionsof material’s thermo-mechanical behaviors during deformation. The proposed constitutive model attempts to describe thematerial’s flow stress responses during deformation by separating the flow stress contributions into the athermal component,thermal component, and dynamic strain aging component. Two different mathematical equations are proposed to model thedynamic strain aging component. The proposed model attempts to describe the mechanical response of niobium for a widerange of strain rates: from quasi-static loading ( ̇ = 0.001 s−1 ) to dynamic loading ( ̇ = 3300 s−1 ) across the temperatureranges 77 K–800 K.
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