Results 81 to 90 of about 125,794 (294)
Mapping the potential energy surfaces for ring-closing metathesis reactions of prototypical dienes by electronic structure calculations [PDF]
, 2011 The potential energy surfaces for ring-closing metathesis reactions of a series of simple alpha,omega-dienes which lead to 5-10 membered ring products, have been explored using density functional theory methods.
Hillier, I.H. +3 more
core +1 more source
Macromolecular Rapid Communications, EarlyView.Metathesis‐derived cyclopentene epoxides enable strictly alternating, scrambling‐free ring‐opening copolymerization with phthalic thioanhydride, yielding well‐defined polythioesters with molecular weights up to ∼38 kg/mol. Their performance extends to oxygen‐based anhydrides and selective terpolymerizations. Direct comparisons with all‐oxygen analogues
Niracha Tangyen +3 more
wiley +1 more source
Jurnal Teknik Pertanian Lampung, 2020 The maintenance system at PT Perkebunan Sentool Zidam V / Brawijaya is the maintenance of breakdowns. The syringe process suffers from engine failure and low maintenance inefficiencies.
Gray Miller Damanik +2 more
doaj +1 more source
Center of mass and relative motion in time dependent density functional theory
, 1994 It is shown that the exchange-correlation part of the action functional $A_{xc}[\rho (\vec r,t)]$ in time-dependent density functional theory , where $\rho (\vec r,t)$ is the time-dependent density, is invariant under the transformation to an accelerated
A. Zangwill +12 more
core +1 more source
On the role of Prognostics and Health Management in advanced maintenance systems [PDF]
, 2016 The advanced use of the Information and Communication Technologies is evolving the way that systems are managed and maintained. A great number of techniques and methods have emerged in the light of these advances allowing to have an accurate and ...
Crespo Márquez, Adolfo +3 more
core +2 more sources
People and Nature, EarlyView.Abstract Meat production has notable benefits for food security, nutrition and various production economies, but has elicited substantial negative environmental impacts. Recreational hunting provides an alternative to agricultural meat production for over 24 million hunters worldwide.
Shane P. Mahoney, Richard D. Honor
wiley +1 more source
Neuromodulation: Technology at the Neural Interface, EarlyView., 2021 Abstract Background Refractory chronic migraine (rCM) is a highly disabling condition for which novel safe and effective treatments are needed. Safety and long‐term efficacy of paresthesia‐free high cervical 10 kHz spinal cord stimulation (SCS) were here prospectively evaluated for the treatment of rCM.
Adnan Al‐Kaisy +7 more
wiley +1 more source
The Dipole Coupling of Atoms and Light in Gravitational Fields
, 1994 The dipole coupling term between a system of N particles with total charge zero and the electromagnetic field is derived in the presence of a weak gravitational field. It is shown that the form of the coupling remains the same as in flat space-time if it
B.S. DeWitt +21 more
core +1 more source
Center-of-mass corrections revisited: a many-body expansion approach [PDF]
, 1998 A many-body expansion for the computation of the charge form factor in the center-of-mass system is proposed. For convergence testing purposes, we apply our formalism to the case of the harmonic oscillator shell model, where an exact solution exists.
Heisenberg, Jochen H., Mihaila, Bogdan
core +2 more sources
Permafrost and Periglacial Processes, EarlyView.ABSTRACT Using a large and novel array of instruments on five rockwalls in northern Gaspesia, their respective surface energy balances were calculated and their thermal regimes were measured and modeled to depths exceeding the seasonal frost penetration.
Tom Birien, Francis Gauthier
wiley +1 more source