Results 51 to 60 of about 15,594,346 (384)
A Model for Igniter Mass Flow Rate History Evaluation for Solid Rocket Motors
International Journal of Aerospace Engineering, 2019 This paper describes a zero-dimensional model for evaluating the mass flow rate history of a solid rocket motor igniter. Based on the results of an igniter-firing experiment, in which the igniter is the only source of combustion gas and no propellant is ...
Yanjie Ma +4 more
doaj +1 more source
Agriculture, 2022 The focus of world governance on climate change has been on the industrial and transport sectors, yet the agricultural sector produces a lot of greenhouse gases, and this has always been ignored.
Shibin Wen, Yuxiang Hu, Hongman Liu
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The Network Structure of International Trade [PDF]
American Economic Review, 2014 Motivated by empirical evidence I uncover on the dynamics of French firms' exports, I offer a novel theory of trade frictions. Firms export only into markets where they have a contact. They search directly for new trading partners, but also use their existing network of contacts to search remotely for new partners. I characterize the dynamic formation
openaire +6 more sources
The dorsal shell wall structure of Mesozoic ammonoids [PDF]
Acta Palaeontologica Polonica, 2017 The study of pristine preserved shells of Mesozoic Ammonoidea shows different types of construction and formation of the dorsal shell wall. We observe three major types: (i) The vast majority of Ammonoidea, usually planispirally coiled, has a prismatic ...
Gregor Radtke, Helmut Keupp
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Comprehensive identification of internal structure and alternative splicing events in circular RNAs
Nature Communications, 2016 Although previous studies demonstrated circular RNAs (circRNAs) does not exclusively comprise mRNA exons, no study has extensively explored their internal structure. By combining an algorithm with long-read sequencing data and experimental validation, we,
Yuan Gao +5 more
semanticscholar +1 more source
Mathematics, 2023 Academic burnout is a psychological problem characterized by three dimensions: emotional exhaustion, depersonalization, and personal accomplishment.
Raimundo Aguayo-Estremera +4 more
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An In-depth Study on Internal Structure of Chinese Words [PDF]
arXiv, 2021 Unlike English letters, Chinese characters have rich and specific meanings. Usually, the meaning of a word can be derived from its constituent characters in some way. Several previous works on syntactic parsing propose to annotate shallow word-internal structures for better utilizing character-level information.
arxiv
International Trade Finance from the Origins to the Present: Market Structures, Regulation and Governance [PDF]
Eric Brousseau, Jean-Michel Glachant, J{\'e}r{\^o}me Sgard. The
Oxford Handbook of Institutions of International Economic Governance and
Market Regulation, Oxford University Press, In press, 9780190900571, 2020 This chapter presents a history of international trade finance - the oldest domain of international finance - from its emergence in the Middle Ages up to today. We describe how the structure and governance of the global trade finance market changed over time and how trade credit instruments evolved.
arxiv +1 more source
AerospaceTo achieve rapid vector maneuvering of a space micro-nano satellite, a micro-sized solid rocket motor was utilized as its propulsion system, and a micro-jet-vane-thrust-vector control system was devised.
Gang Zhang +4 more
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Generation of LDPM structure formed by Voronoi cells
Acta Polytechnica CTU Proceedings, 2023 A preliminary study of an approach to internal structure generation used in lattice discrete particle models (LDPMs) [1]. The presented method used for particle generation and placement is intended to help realistically capture the internal structure of
Jan Vozáb, Jan Vorel
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