scholarly journals Hugoniot EOS measurements at Mbar pressures

1996 ◽  
Vol 14 (2) ◽  
pp. 113-123 ◽  
Author(s):  
A.M. Evans ◽  
N.J. Freeman ◽  
P. Graham ◽  
C.J. Horsfield ◽  
S.D. Rothman ◽  
...  
Keyword(s):  
High Pressure ◽  
Data Analysis ◽  
Reference Material ◽  
Streak Camera ◽  
Shock Velocity ◽  
Impedance Match ◽  
Match Method ◽  
Gas Gun ◽  
Indirect Drive ◽  
Fabrication And Characterization

The AWE HELEN laser is being used to measure high-pressure Hugoniot data by the impedance match method. Indirect drive is used to generate pressures of up to 10 Mbar in the aluminum reference material. We are aiming to measure shock velocities in our targets to ± 1 %, leading to errors in pressure and particle velocity of the order of ±2%. This requires improvements in target fabrication and characterization, streak camera calibration and data analysis, coupled with investigations into shock planarity and attenuation. Our latest results have accuracies of 2–4% in shock velocity but have identified work that should allow us to achieve our intended level of accuracy. Experiments have been done with copper and chlorinated plastic; our results are compared with theory, and, for copper, with U.S. and Russian gas-gun, explosively or nuclear-driven experiments.

IMPROVING STUDENT’S VOCABULARY ACHIEVEMENT IN WITING DESCRIPTIVE TEXT THROUGH MAKE A MATCH METHOD

2013 ◽  
Vol 2 (4) ◽  
Author(s):  
Irma Lely Lumban Gaol And Johan Sinulingga
Keyword(s):  
Data Analysis ◽  
Action Research ◽  
Learning Process ◽  
Match Method ◽  
Writing Test ◽  
The Subject ◽  
Classroom Action Research ◽  
Teaching Learning ◽  
Descriptive Writing ◽  
Vocabulary Achievement

This study is concerned with the improving student’s vocabulary achievement in writing descriptive text through Make a Match Method. The objective of this study was to discover whether the use of Make a Match Method could significantly improve students’ vocabulary achievement in writing descriptive text. This study was conducted by applying Classroom Action Research which was carried out in two cycles in six meetings. The subject of this study was students of SMA Negeri 1 Pollung which consisted of 34 students. The instruments for collecting data were descriptive writing test, observation sheet, questionnaire sheet, and diary notes. The techniques for data analysis were quantitative and qualitative. It was found that teaching-learning process ran well. Students were active, enthusiastic and interested on writing descriptive text. The result of this study showed that the use of Make a Match Method significantly improved student’s vocabulary achievement in writing descriptive text.

Impact of high pressure on the progress of polymerization of DGEBA cured with different amine hardeners: dielectric and DSC studies

RSC Advances ◽  
2015 ◽  
Vol 5 (128) ◽  
pp. 105934-105942 ◽  
Author(s):  
M. Tarnacka ◽  
M. Wikarek ◽  
S. Pawlus ◽  
K. Kaminski ◽  
M. Paluch
Keyword(s):  
High Pressure ◽  
Data Analysis ◽  
Dsc Studies ◽  
Curing Reaction ◽  
Dielectric Data ◽  
Novel Method ◽  
Extract Information

A novel method of dielectric data analysis to extract information on the progress of the curing reaction is proposed.

scholarly journals Fabrication and characterization of nanostructured immiscible Cu–Ta alloys processed by high-pressure torsion

2020 ◽  
Vol 832 ◽  
pp. 155007 ◽  
Author(s):  
Tayebeh Mousavi ◽  
Jiaoyan Dai ◽  
Piotr Bazarnik ◽  
Pedro Henrique R. Pereira ◽  
Yi Huang ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Fabrication And Characterization

New Data Analysis Method for Time-Resolved Infrared Photoluminescence Spectroscopy

2020 ◽  
pp. 000370282096970
Author(s):  
Kacper Grodecki ◽  
Krzysztof Murawski
Keyword(s):  
Data Analysis ◽  
Photoluminescence Spectrum ◽  
Streak Camera ◽  
Photoluminescence Spectroscopy ◽  
Analysis Method ◽  
Time Resolved ◽  
Time Constants ◽  
Data Treatment ◽  
Typical Time ◽  
Time Resolved Photoluminescence

In this article, a new data treatment based on time-resolved photoluminescence is presented. It works as a streak camera for infrared. A time-resolved photoluminescence spectrum for the HgCd0.33Te0.67 sample at 120 K was performed and analyzed. Typical time-resolved photoluminescence measurements, to compare our results with literature, were conducted. An interpretation of the behavior for three different time constants found in the signal is proposed.

Real-Time Diagnosis of Etching and Deposition Processes by Spectroscopic Ellipsometry

1983 ◽  
Vol 29 ◽  
Author(s):  
D. E. Aspnes ◽  
R. P. H. Chang
Keyword(s):  
High Pressure ◽  
Data Analysis ◽  
Laser Beam ◽  
Real Time ◽  
Spectroscopic Ellipsometry ◽  
Chemical Etching ◽  
Polarization State ◽  
Surface Information ◽  
Deposition Processes ◽  
Time Diagnosis

ABSTRACTRecent advances in instrumentation and data analysis have made spectroscopic ellipsometry a routine analytic tool with submonolayer sensitivity for monitoring and controlling cleaning, etching, deposition, or other processes that take place in relatively high-pressure or reactive environments. We discuss representative applications in chemical etching, plasma processing, and MOCVD to illustrate analytical procedures and to indicate other potential uses of the technique. The possibility of extracting surface information already carried in the polarization state of the processing laser beam is also discussed.

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