Synthesis of substituted naphtho[1,2-b]benzofuran-7(8H)-ones via photoinduced rearrangement of 4H-chromen-4-one derivatives

2020 ◽  
Vol 18 (13) ◽  
pp. 2501-2509 ◽  
Author(s):  
Boris V. Lichitskii ◽  
Valeriya G. Melekhina ◽  
Andrey N. Komogortsev ◽  
Constantine V. Milyutin ◽  
Artem N. Fakhrutdinov ◽  
...  
Keyword(s):  
Efficient Method ◽  
Photoinduced Rearrangement

A simple and efficient method was developed for the synthesis of substituted naphtho[1,2-b]benzofuran-7(8H)-ones based on the photorearrangement reaction of 4H-chromen-4-one derivatives.

An Efficient Method for Estimating Aerodynamic Angles for Small Unmanned Aircraft

2019 ◽  
Author(s):  
Guilherme Barufaldi ◽  
Marcus Victor ◽  
Luiz Carlos Sandoval Góes ◽  
ROBERTO GIL ANNES DA SILVA
Keyword(s):  
Efficient Method ◽  
Unmanned Aircraft ◽  
Aerodynamic Angles

Speed vs. comfort: Testing the efficacy of a single question for predicting transit users’ route choices

2019 ◽  
Author(s):  
Joseph John Pyne Simons ◽  
Ilya Farber
Keyword(s):  
Data Collection ◽  
Efficient Method ◽  
Choice Task ◽  
The Self ◽  
Self Report ◽  
Model Parameters ◽  
Single Item ◽  
Alternative Approach ◽  
Single Question ◽  
Insight Into

Not all transit users have the same preferences when making route decisions. Understanding the factors driving this heterogeneity enables better tailoring of policies, interventions, and messaging. However, existing methods for assessing these factors require extensive data collection. Here we present an alternative approach - an easily-administered single item measure of overall preference for speed versus comfort. Scores on the self-report item predict decisions in a choice task and account for a proportion of the differences in model parameters between people (n=298). This single item can easily be included on existing travel surveys, and provides an efficient method to both anticipate the choices of users and gain more general insight into their preferences.

EFFICIENT METHOD OF CALCULATING LAYERED CONICAL SHELLS WITH LAGRANGE MULTIGRID ELEMENTS USE

2018 ◽  
Vol 19 (3) ◽  
pp. 423-431
Author(s):  
G. I. Rastorguev ◽  
◽  
A. N. Grishanov ◽  
А. D. Matveev ◽  
◽  
...  
Keyword(s):  
Efficient Method ◽  
Conical Shells
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