Results 21 to 30 of about 8,737,298 (395)

Erica Tietze-Conrat, “On Drawings” [PDF]

open access: yesJournal of Art Historiography, 2020
Originally published as ‘Ueber Handzeichnungen’, Kunstgeschichtliche Anzeigen Beiblatt de Mitteilungen des Instituts für österreichische Geschichtsforschung, edigiert von Max Dvořák, Jahrgang 1913 Heft 1/2, Innsbruck: Wagner 1913, pp.
Karl Johns
doaj  

Accurate molecular van der Waals interactions from ground-state electron density and free-atom reference data.

open access: yesPhysical Review Letters, 2009
We present a parameter-free method for an accurate determination of long-range van der Waals interactions from mean-field electronic structure calculations.
A. Tkatchenko, M. Scheffler
semanticscholar   +1 more source

A Survey of Air-to-Ground Propagation Channel Modeling for Unmanned Aerial Vehicles [PDF]

open access: yesIEEE Communications Surveys and Tutorials, 2018
In recent years, there has been a dramatic increase in the use of unmanned aerial vehicles (UAVs), particularly for small UAVs, due to their affordable prices, wide availability, and relative ease of operability.
W. Khawaja   +4 more
semanticscholar   +1 more source

RESEARCH OF INFLUENCE OF THE FORM OF BASIC SURFACE OF CATERPILLAR LINKS OF EXCAVATORS ON THEIR WORKING CAPACITY [PDF]

open access: yesAvtomobilʹnyj Transport (Harʹkov), 2012
The matter concerning loads impact on the soil by caterpillar links of excavators depending on a form of their basic surface is considered. The possibility of decrease of local pressure of the caterpillar on the soil at hinge zone at the expense of ...
Koynash, V., Krupko, V.
doaj  

Investigation of heat exchange processes in vertically arranged heat exchangers

open access: yesҚарағанды университетінің хабаршысы. Физика сериясы, 2019
Today, in many countries, electricity is produced in a variety of ways, depending on current trends. The use of heat pump technology in heat energy development is one of the most efficient energetic methods. In order to save energy, it makes possible to
K.M. Shaimerdenova   +3 more
doaj   +1 more source

INTERACTION ANALYSIS OF THE CONSOLE KNIFE SURFACE WITH THE SOIL

open access: yesВестник СибАДИ, 2020
Introduction. In Russia the use of cyclical equipment to remove the top layer of the soil is not feasible. The problem of the roads construction accelerating, improving their quality can be solved by applying a continuous action unit to form a litter ...
V. A. Nikolaiev
doaj   +1 more source

Effects of Microplastics in Soil Ecosystems: Above and Below Ground.

open access: yesEnvironmental Science and Technology, 2019
Environmental contamination by microplastics is now considered an emerging threat to biodiversity and ecosystem functioning. Soil ecosystems, particularly agricultural land, have been recognized as a major sink of microplastics, but the impacts of ...
B. Boots   +2 more
semanticscholar   +1 more source

Nuclear ground state masses and deformations [PDF]

open access: yes, 1993
We tabulate the atomic mass excesses and nuclear ground-state deformations of 8979 nuclei ranging from 16O to A = 339. The calculations are based on the finite-range droplet macroscopic model and the folded-Yukawa single-particle microscopic model ...
P. Moller   +3 more
semanticscholar   +1 more source

Grounding grounds necessity

open access: yesAnalysis, 2020
Abstract Drawing from extensions of existing ideas in the logic of ground, a novel account of the grounds of necessity is presented, the core of which states that necessary truths are necessary because they stand in specific grounding connections.
openaire   +2 more sources

Euthanasia: above ground, below ground [PDF]

open access: yesJournal of Medical Ethics, 2004
The key to the euthanasia debate lies in how best to regulate what doctors do. Opponents of euthanasia frequently warn of the possible negative consequences of legalising physician assisted suicide and active euthanasia (PAS/AE) while ignoring the covert practice of PAS/AE by doctors and other health professionals.
openaire   +2 more sources

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