Dynamic numerical analysis of a stepped-planar rock slide in central Chile – Preliminary results

2016 ◽  
Author(s):  
M García ◽  
S Sepúlveda ◽  
S Moya ◽  
C Pastén ◽  
G Montalva
Keyword(s):  
Numerical Analysis ◽  
Rock Slide ◽  
Central Chile ◽  
Preliminary Results

An active large rock slide in the Andean paraglacial environment: the Yerba Loca landslide, central Chile

Landslides ◽  
2020 ◽  
Author(s):  
Sergio A. Sepúlveda ◽  
Alejandro Alfaro ◽  
Marisol Lara ◽  
Javiera Carrasco ◽  
Paula Olea-Encina ◽  
...  
Keyword(s):  
Rock Slide ◽  
Central Chile

scholarly journals Forming of thin-walled elements using laser heating and mechanical load

Mechanik ◽  
2018 ◽  
Vol 91 (2) ◽  
pp. 148-151
Author(s):  
Piotr Kurp ◽  
Jacek Widłaszewski ◽  
Zygmunt Mucha
Keyword(s):  
Numerical Analysis ◽  
Laser Beam ◽  
Numerical Simulations ◽  
Laser Heating ◽  
Mechanical Load ◽  
Experimental Investigations ◽  
Aircraft Engines ◽  
Preliminary Results ◽  
Experimental Stand ◽  
Thin Walled

The paper presents assumptions and preliminary results of experimental investigations and numerical simulations of forming thin-walled elements using laser beam and mechanical load. An experimental stand, dedicated for bending thin-walled tubes and conical diffusers, which are used in aircraft engines, has been designed and built. The method and stand, which were tested in laboratory conditions, together with numerical analysis results show new possibilities of forming thin-walled elements.

Geochronology of the Lake Region of south-central Chile (39°–42°S): Preliminary results

1988 ◽  
Vol 1 (3) ◽  
pp. 309-316 ◽  
Author(s):  
F. Munizaga ◽  
F. Herve ◽  
R. Drake ◽  
R.J. Pankhurst ◽  
M. Brook ◽  
...  
Keyword(s):  
Central Chile ◽  
Preliminary Results ◽  
South Central ◽  
Lake Region

scholarly journals Analogue model of ground ruptures due to groundwater pumping in an aquifer above a bedrock ridge

2020 ◽  
Vol 382 ◽  
pp. 433-436
Author(s):  
Mariano Cerca ◽  
Dora Carreón-Freyre ◽  
Pietro Teatini
Keyword(s):  
Numerical Analysis ◽  
Land Subsidence ◽  
Numerical Results ◽  
Groundwater Pumping ◽  
Analogue Model ◽  
Tensile Stresses ◽  
Aquifer System ◽  
Preliminary Results ◽  
Physical Experiments ◽  
Main Deformation

Abstract. We report preliminary results of physical experiments of rupture occurrence and propagation associated with land subsidence driven by groundwater pumping and compare our analogue model results with corresponding previously reported numerical results. In particular, we aim to test the development of tensile stresses above a bedrock ridge that forms the base of an aquifer system. The experiment reproduces the main deformation and ruptures observed in field cases and in the numerical analysis.

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

Cyclic Evolution of Sunspots: Gleaning New Results from Old Data

2000 ◽  
Vol 179 ◽  
pp. 163-165
Author(s):  
S. K. Solanki ◽  
M. Fligge ◽  
P. Pulkkinen ◽  
P. Hoyng
Keyword(s):  
Sunspot Number ◽  
Sunspot Cycle ◽  
Preliminary Results ◽  
Butterfly Diagram

AbstractThe records of sunspot number, sunspot areas and sunspot locations gathered over the centuries by various observatories are reanalysed with the aim of finding as yet undiscovered connections between the different parameters of the sunspot cycle and the butterfly diagram. Preliminary results of such interrelationships are presented.

Systematic effects in observed parallaxes

1978 ◽  
Vol 48 ◽  
pp. 31-35
Author(s):  
R. B. Hanson
Keyword(s):  
Error Estimates ◽  
Zero Point ◽  
Absolute Zero ◽  
Apparent Magnitude ◽  
Coherent System ◽  
Preliminary Results ◽  
General Catalogue ◽  
Systematic Effects ◽  
New Evidence ◽  
Right Ascension

Several outstanding problems affecting the existing parallaxes should be resolved to form a coherent system for the new General Catalogue proposed by van Altena, as well as to improve luminosity calibrations and other parallax applications. Lutz has reviewed several of these problems, such as: (A) systematic differences between observatories, (B) external error estimates, (C) the absolute zero point, and (D) systematic observational effects (in right ascension, declination, apparent magnitude, etc.). Here we explore the use of cluster and spectroscopic parallaxes, and the distributions of observed parallaxes, to bring new evidence to bear on these classic problems. Several preliminary results have been obtained.

Quantitative Measurements on the Ion Etching of TMV

1973 ◽  
Vol 31 ◽  
pp. 336-337
Author(s):  
Irwin Bendet ◽  
Nabil Rizk
Keyword(s):  
Electron Microscope ◽  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Ion Current ◽  
Beam Diameter ◽  
Ion Etching ◽  
Preliminary Results ◽  
Quantitative Measurements ◽  
Monitoring Devices

Preliminary results reported last year on the ion etching of tobacco mosaic virus indicated that the diameter of the virus decreased more rapidly at 10KV than at 5KV, perhaps reaching a constant value before disappearing completely.In order to follow the effects of ion etching on TMV more quantitatively we have designed and built a second apparatus (Fig. 1), which incorporates monitoring devices for measuring ion current and vacuum as well as accelerating voltage. In addition, the beam diameter has been increased to approximately 1 cm., so that ten electron microscope grids can be exposed to the beam simultaneously.

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