scholarly journals Preliminary results of experimental work in the radionuclide migration program. The sorption character of tuffaceous rocks in a ''static'' versus ''dynamic'' mode of testing

1976 ◽  
Author(s):  
J. D. Tewhey
Keyword(s):  
Experimental Work ◽  
Radionuclide Migration ◽  
Preliminary Results ◽  
Migration Program

scholarly journals β-γ and isomeric decay spectroscopy of 168Dy

2018 ◽  
Vol 178 ◽  
pp. 02023
Author(s):  
G.X. Zhang ◽  
H. Watanabe ◽  
F.G. Kondev ◽  
G.J. Lane ◽  
P.H. Regan ◽  
...  
Keyword(s):  
Experimental Data ◽  
Excited States ◽  
Experimental Work ◽  
Isomeric State ◽  
Level Structure ◽  
Primary Beam ◽  
Average Intensity ◽  
Experimental Procedure ◽  
Preliminary Results ◽  
Decay Spectroscopy

This contribution will report on the experimental work on the level structure of 168Dy. The experimental data have been taken as part of the EURICA decay spectroscopy campaign at RIBF, RIKEN in November 2014. In the experiment, a 238U primary beam is accelerated up to 345 MeV/u with an average intensity of 12 pnA. The nuclei of interest are produced by in-flight fission of 238U impinging on Be target with a thickness of 5 mm. The excited states of 168Dy have been populated through the decay from a newly identified isomeric state and via the β decay from 168Tb. In this contribution, scientific motivations, experimental procedure and some preliminary results for this study are presented.

scholarly journals I. Researches on the electrical properties of pure substances. No. I. The electrical properties of pure sulphur

1894 ◽  
Vol 56 (336-339) ◽  
pp. 32-40 ◽  
Keyword(s):  
Electrical Properties ◽  
Experimental Work ◽  
Electrical Behaviour ◽  
Philosophical Magazine ◽  
Preliminary Results ◽  
Pure Substances

Since there appears to be no definite information as to the electrical properties of pure elemental substances which are not metals, an attempt has been made to provide the necessary data in the case of sulphur. This element was chosen as being capable of easy purification, and because it can exist in a variety of forms, from the comparison of the electrical behaviour of which some information was expected to be obtained. The experimental work was begun in 1886, and some preliminary results were published by one of the authors and Mr. J. A. Pollock in the ‘Philosophical Magazine’ for 1890.

Improved Wheel Tread Profiles for Heavy Freight Vehicles

1980 ◽  
Vol 102 (3) ◽  
pp. 263-271
Author(s):  
P. P. Marcotte ◽  
K. J. R. Mathewson ◽  
W. N. Caldwell
Keyword(s):  
Computer Simulation ◽  
Steady State ◽  
Field Test ◽  
Experimental Work ◽  
Preliminary Results ◽  
Rail Head ◽  
Potential Benefits ◽  
Wheel Profile ◽  
Freight Car

This paper describes recent theoretical and experimental work carried out by CN Rail Research in an effort to improve the performance of conventional 100-ton freight car trucks through the use of nonstandard wheel tread profiles. The steady state curving behavior of a conventional three-piece frame truck has been studied using a nonlinear computer simulation to identify the effects of wheel conicity and track curvature on wheel-rail forces and on wear parameters. Lateral curving forces were compared from a field test using dynamometer tieplates on a 5-degree curve (350 m radius) for four different wheel profiles including the AAR standard for new wheels. Preliminary results of a long term test on cars in revenue service are presented to show the effect of initial wheel profile on the early wear patterns as well as to show the methodology used for comparing the profiles under test. Finally, a brief review is made of the potential benefits resulting from the use of wheel profiles which are better adapted to service-worn rail head contours.

scholarly journals Identification by Microscopy of a Natural Hybrid between Portuguese Digitalis Species

2012 ◽  
Vol 18 (S5) ◽  
pp. 43-44
Author(s):  
J. Silva ◽  
E. T. Gomes ◽  
R. Serrano ◽  
and O. Silva
Keyword(s):  
Plant Species ◽  
Experimental Work ◽  
Cardiac Glycosides ◽  
Geographic Area ◽  
Natural Hybrid ◽  
Northeast Region ◽  
Preliminary Results ◽  
Digitalis Purpurea ◽  
Natural Hybrids

Digitalis purpurea L. and Digitalis thapsi L. (Iberian endemism) are two well known Portuguese species that contain cardiac glycosides. Last year we found some specimens in the Northeast region of Portugal that appeared to us to be natural hybrids between D. purpurea and D. thapsi. In consequence, morphological, genetic and chemical experimental work was performed, involving a minimum of 30 samples of each plant species collected in this geographic area. Preliminary results of this work have been published.

scholarly journals Roots Characteristics of a flexible and mature vegetation: Preliminary results of experimental investigation in a meandering laboratory flume

2018 ◽  
Vol 40 ◽  
pp. 02052
Author(s):  
Donatella Termini ◽  
Alice Di Leonardo
Keyword(s):  
Mechanical Properties ◽  
Experimental Investigation ◽  
Experimental Work ◽  
Mechanical Characteristics ◽  
Sediment Dynamics ◽  
Kinematic Characteristic ◽  
Preliminary Results ◽  
Kinematic Characteristics ◽  
Laboratory Flume

Vegetation controls sediment dynamics and affects the kinematic characteristics of flow in rivers. The uprooting mechanism is strongly affected by mechanical properties, morphology and branching of the roots system. This work presents preliminary results of experimental work conducted in a laboratory meandering flume. The work aims to investigate how the geometrical and mechanical characteristics of the roots of a real, flexible and mature vegetation could vary along the bend. Results show that both the geometrical and the mechanical characteristics of the roots assume higher/lower values in peculiar sections of the bend suggesting that they could be affected by the kinematic characteristic of flow.

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.

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