Browsing by Title
Now showing items 95560-95579 of 142790
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P And S Wave Velocity Determination
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1983)There are three general methods that can be used to determine formation velocities from full waveform logs. The first approach is to make use of the data from the entire waveform. This type of velocity analysis is performed ... -
P and SV waves 3-D Numerical Modeling of AVOA from Heterogeneous Fractured Reservoirs
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1997)We study the effects of fracture-induced anisotropy and lateral fracture density heterogeneity on the reflected P and SV wave amplitude variation with offset and azimuth (AVOA), using 3-D finite-difference simulations. The ... -
P III /P V =O Catalyzed Cascade Synthesis of N‐Functionalized Azaheterocycles
(Wiley, 2020)© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim An organocatalytic method for the modular synthesis of diverse N-aryl and N-alkyl azaheterocycles (indoles, oxindoles, benzimidazoles, and quinoxalinediones) is reported. ... -
P III /P V ═O-Catalyzed Intermolecular N–N Bond Formation: Cross-Selective Reductive Coupling of Nitroarenes and Anilines
(American Chemical Society (ACS), 2021)An organophosphorus-catalyzed method for the synthesis of unsymmetrical hydrazines by cross-selective intermolecular N-N reductive coupling is reported. This method employs a small ring phosphacycle (phosphetane) catalyst ... -
P recision design of stable genetic circuits carried in highly‐insulated E. coli genomic landing pads
(EMBO, 2020)© 2020 The Authors. Published under the terms of the CC BY 4.0 license Genetic circuits have many applications, from guiding living therapeutics to ordering process in a bioreactor, but to be useful they have to be genetically ... -
P(III)/P(V)-Catalyzed Methylamination of Arylboronic Acids and Esters: Reductive C–N Coupling with Nitromethane as a Methylamine Surrogate
(American Chemical Society (ACS), 2020)Copyright © 2020 American Chemical Society. The direct reductive N-arylation of nitromethane by organophosphorus-catalyzed reductive C-N coupling with arylboronic acid derivatives is reported. This method operates by the ... -
The (p,n) reaction on 9Be and 17O at 135 MeV
(Massachusetts Institute of Technology, 1985) -
P- and S- wave tomography of the crust and uppermost mantle in China and surrounding areas
(Massachusetts Institute of Technology, 2005)This thesis involves inverting the seismic structure of the crust and uppermost mantle in China from the P- and S-wave travel-time tomography. The main contributions of this research are: 1) introducing the adaptive moving ... -
p-adic dimensions in symmetric tensor categories in characteristic p
(European Mathematical Publishing House, 2018-02)To every object X of a symmetric tensor category over a field of characteristic p > 0 we attach p-adic integers Dim+(X) and Dim−(X) whose reduction modulo p is the categorical dimension dim(X) of X, coinciding with the ... -
p-adic interpolation of iterates
(Oxford University Press, 2014-03)Extending work of Bell and of Bell, Ghioca, and Tucker, we prove that for a p-adic analytic self-map f on a closed unit polydisk, if every coefficient of f(x)−x has valuation greater than that of p [1over (p−1)], then the ... -
P-adic L-functions for elliptic curves over CM fields
(Massachusetts Institute of Technology, 1983) -
The p-adic local langlands conjecture
(Massachusetts Institute of Technology, 2005)Let k be a p-adic field. Split reductive groups over k can be described up to k- isomorphism by a based root datum alone, but other groups, called rational forms of the split group, involve an action of the Galois group ... -
p-adic modular forms over Shimura curves over Q
(Massachusetts Institute of Technology, 1999) -
p-Channel gallium nitride transistor on Si substrate
(Massachusetts Institute of Technology, 2018)Gallium Nitride, a wide bandgap (3.4 eV) semiconductor, has outstanding attributes, such as, high breakdown electric field, high electron mobility, which make it suitable for applications requiring high power and high ... -
p-GaN Platform for Next-Generation GaN Complementary Transistors and Circuits
(Massachusetts Institute of Technology, 2024-02)Gallium nitride (GaN) integrated circuits (ICs) are receiving increasing attention because they offer compactness, reduced parasitics, and higher performance compared to discrete transistors or printed circuit board (PCB) ... -
P-N junction microwave phase modulators.
(Massachusetts Institute of Technology, 1972) -
The P-Norm Push: A Simple Convex Ranking Algorithm that Concentrates at the Top of the List
(MIT Press, 2009-10)We are interested in supervised ranking algorithms that perform especially well near the top of the ranked list, and are only required to perform sufficiently well on the rest of the list. In this work, we provide a ... -
The p-parity conjecture for elliptic curves with a p-isogeny
(Walter de Gruyter, 2014-06)For an elliptic curve E over a number field K, one consequence of the Birch and Swinnerton-Dyer conjecture is the parity conjecture: the global root number matches the parity of the Mordell-Weil rank. Assuming finiteness ... -
P-TAXI : enforcing memory safety with programmable tagged architecture
(Massachusetts Institute of Technology, 2016)Buffer overflow is a well-known problem that remains a threat to software security. With the advancement of code-reuse attacks and return-oriented programming (ROP), it becomes problematic to protect a program from being ... -
P-wave electrical alternans as an indicator of paroxysmal atrial fibrillation
(Massachusetts Institute of Technology, 1999)P-wave electrical alternans is a beat to beat alternation in the morphology of the P-wave, the wave in an electrocardiogram corresponding to atrial depolarization. In this investigation, software to measure p-wave alternans ...
