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Showing 1 to 20 of 2323 for “"Substitution"”.
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Nucleophilic aromatic substitution of metallabenzenes
… new benzenelike reaction - nucleophilic aromatic substitution of hydrogen (SN H) (Scheme 0-1). In this process, the nucleophile (Nu) first attacks the cationic metallabenzene (A) at the γ position to the neutral metallacyclohexadiene compound (B). Oxidation with an external oxidant [O] can then …
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Security of substitution-permutation network
… the security of a block cipher design called substitution-permutation network (SPN). We prove that when S-box is chosen uniformly at random as a permutation, the resulting SPN is a strong pseudorandom permutation even against an adversary having oracle access to that S-box. We then examine …
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Import-substitution industrialization in Turkey
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 1990.
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Nitro-substitution products of benzole
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemistry, 1881
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Labor Substitution in U.S. Manufacturing
… model designed to estimate the elasticity of substitution between capital, non-production workers, and production workers using U.S. manufacturing data for the period 1988 to 1997. The elasticity of substitution estimates derived from the translog model suggest that production workers and …
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Import Substitution Industrialization:Case Study of Zambia
… most less developed countries, opted for import substitution industrialization (ISI) as a strategy of economic advancement. The success of ISI performance in Zambia would have resulted in the abundance rather than scarcity of foreign exchange; economic diversification;resolution of the galloping …
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Import Substitution Industrialization:Case Study of Zambia
… most less developed countries, opted for import substitution industrialization (ISI) as a strategy of economic advancement. The success of ISI performance in Zambia would have resulted in the abundance rather than scarcity of foreign exchange; economic diversification;resolution of the galloping …
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Isoelektronische Substitution des Arsens in Eisenpniktiden
… Ziel soll es sein, die Möglichkeit einer Substitution des Arsens durch das Pnikogen mit dem nächstgrößeren Volumen, Antimon, zu untersuchen. Bei erfolgreichem Einbau des Antimons kommt es zu einer Änderung des Fermi-Flächen-Nestings, sowie des Phononenspektrums, was sich in einer Änderung …
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Reinventing Aromatic Substitution: A Novel Look
<p>Electrophilic aromatic substitution (EAS) and directed <em>ortho</em>-metalation (DoM) involve the direct substitution of an arene hydrogen. A major drawback involving EAS is the necessity for harsh forcing conditions for the reaction to proceed. Catalysts such as Lewis acids FeBr<sub>3</sub> …
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Continuous Spectra For Substitution-Based Sequences
… chiefly concerned with the continuous spectra of substitution-based sequences. First, motivated by a question of Lafrance, Yee and Rampersad [34], we establish a connection between the ‘root-N’ property and the corresponding sequences that satisfy it having absolutely continuous spectrum. Then we …
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Navigating Molecular Evolution Using Substitution Mappings
Since first proposed in 2002, Bayesian substitution mappings have found less use than might have been expected in the field of molecular evolution. Here, I first create a sequence simulator capable of generating true substitution mappings for simulated data under any time-reversible model in order …
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The Photochemical Substitution of Dimanganese-Decacarbonyl
Made available in DSpace on 2014-12-13T20:10:13Z (GMT). No. of bitstreams: 1 7804049.pdf: 4694293 bytes, checksum: 82557a5de6da3225b033b6bb9bf5e382 (MD5) Previous issue date: 1977
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An efficient substitution model scheme evaluator
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Sound-to-Touch Sensory Substitution and Beyond
… non-surgical, and works in adults. "Sensory substitution"--the concept that information can be effectively mapped from one sense to another--has the potential to overcome all of these issues: it is non-invasive (and therefore inexpensive and less regulated) and leverages a developed sensory …
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Vibrotactile sensory substitution for post-stroke rehabilitation
The aftermath of a stroke leaves people with side effects such as speech and hearing problems, and loss of sensation in one side of their body. Sensory feedback in the hand is used to assess if the individual is using appropriate grip force to hold and use objects; lack of sensory feedback can lead …
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Factor substitution in the Irish manufacturing sector.
In this paper I use a flexible specification of a cost function to estimate the elasticities of demand for skilled labour, unskilled labour and capital in the Irish manufacturing sector for the years 1979 to 2005. An understanding of the magnitude of these elasticites can play an important role in …
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Substitution and Disorder Effects in Ternary Intermetallics
… of this dissertation is the investigation of substitution and disorder effects in ternary intermetallics. The crystal growth, crystal structure, and physical properties are reported on single crystals of Ln6W4-xAl43-yTx+y (Ln = Gd, Yb; T= Mn, Fe), LnCr2FexAl20-x (Ln = Yb, Gd), Sm1.33Pd3Ga8, …
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Empirical and theoretical contributions to substitution issues
Empirische und Theoretische Beiträge zum Thema Substitution Der thematische Schwerpunkt dieser Dissertation besteht in der ökonometrischen Schätzung von Produktionsfunktionen (primaler Ansatz) beziehungsweise den dazu dualen Kostenfunktionen (dualer Ansatz) zum Zwecke der Bestimmung von …
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