scholarly journals Short-term stability of Cs microcell-stabilized lasers using dual-frequency sub-Doppler spectroscopy

2021 ◽  
Author(s):  
Anthony Gusching ◽  
Michael Petersen ◽  
Nicolas Passilly ◽  
D. Brazhnikov ◽  
Moustafa Abdel Hafiz ◽  
...  
Keyword(s):  
Dual Frequency ◽  
Short Term ◽  
Term Stability ◽  
Doppler Spectroscopy

Comparability and Short-Term Stability of Techniques to Assess Extension of Thinking about One's Personal Future

1983 ◽  
Vol 56 (2) ◽  
pp. 559-564 ◽  
Author(s):  
William Rakowski ◽  
Clifton E. Barber ◽  
Wayne C. Seelbach
Keyword(s):  
Data Collection ◽  
Life Events ◽  
Short Term ◽  
Life Event ◽  
Term Stability ◽  
The Future ◽  
Changes Over Time ◽  
Over Time

Three techniques for assessing extension of one's personal future (line-marking, open-ended report, life-events) were compared in a sample of 74 respondents. Two points of data collection were employed to examine short-term stability. At both administrations, correlations among indices suggested that techniques were only moderately comparable. Short-term stabilities were variable; correlations ranged from .42 to .79. Across subgroups of the sample, the direct, open-ended report of extension showed the greatest stability, while life-event extension showed the least. Apparently, extension of thinking about the future should be assessed by more than one technique to investigate potential relationships with other variables or changes over time in perspective about the future.

Short-term stability of combined finger and toe photoplethysmogram analysis

2017 ◽  
pp. 342-345
Author(s):  
Mikko Peltokangas ◽  
Matti Huotari ◽  
Jarmo Verho ◽  
Ville M. Mattila ◽  
Juha Röning ◽  
...  
Keyword(s):  
Short Term ◽  
Term Stability

scholarly journals A survey of short-term and long-term stability of tube parameters in a mammography unit

2014 ◽  
Vol 29 (4) ◽  
pp. 321-325
Author(s):  
Jovica Praskalo ◽  
Jasna Davidovic ◽  
Biljana Kocic ◽  
Monika Zivkovic ◽  
Svetlana Pejovic
Keyword(s):  
Screening Program ◽  
Short Term ◽  
X Ray ◽  
Term Stability ◽  
Long Term Stability ◽  
Mammography Screening Program ◽  
The Republic ◽  
Set Up ◽  
The Given

In order to set up a successful mammography screening program in the Republic of Srpska, a Siemens Mammomat 1000 X-ray machine was selected for analysis as the said mammography system is widely used in clinical practice. The variations in tube parameters (specific air kerma, high-voltage accuracy and reproducibility, linearity between exposure and dose exposure time) were monitored over a five-year period, from 2008 to 2012. In addition, due to observed daily fluctuations for chosen parameters, a series of measurements were performed three times a day within a single-month period (mainly October 2012). The goal of such an experimental set up is to assess short-term and long-term stability of tube parameters in the given mammography unit and to make a comparison between them. The present paper shows how an early detection of significant parameter fluctuations can help eliminate irregularities and optimize the performance of mammography systems.

scholarly journals Research on the solidification of silt with cement and zeolite as additives

2016 ◽  
Vol 1 (1) ◽  
pp. 35
Author(s):  
Feng Cheng ◽  
Wang Baotian ◽  
Li Shoude
Keyword(s):  
Heavy Metal ◽  
Industrial Pollution ◽  
Unconfined Compressive Strength ◽  
Effective Solution ◽  
Short Term ◽  
Time Saving ◽  
Term Stability ◽  
Long Term Stability ◽  
Environment Problem

Silt solidification is an important method of silt disposal,and it’s proved to be quick effectiveness and time saving and large in capacity.In recent years,the industrial pollution has made the silt in the lake or the sea rich in harmful elements,such as heavy metal and organic matter,etc,which may strongly influence the solidification effect of silt and trigger secondary pollution.The author proposed a kind of choice,which could effectly decrease harmful elements leaching,based on engineering application.The performances of solidification with different ratio of cement and zeolite,such as unconfined compressive strength,compression coefficient,heavy metal fractions,heavy metal short-term stability and long-term stability are systematicly studied.The article confirmed that the addition of the cement and the zeolite increase the strength of the soil and effectly enhance its deformation resistant capability,Further more,they significantly decrease the activity of harmful elements and greatly reduce the threat to the environment,which finds an effective solution to the environment problem.

scholarly journals Precise Point Positioning for TAI Computation

2008 ◽  
Vol 2008 ◽  
pp. 1-8 ◽  
Author(s):  
Gérard Petit ◽  
Zhiheng Jiang
Keyword(s):  
Time Scale ◽  
Carrier Phase ◽  
Precise Point Positioning ◽  
Dual Frequency ◽  
Time Transfer ◽  
Short Term ◽  
Reference Time ◽  
Local Clock ◽  
Point Positioning ◽  
Simple Difference

We discuss the use of some new time transfer techniques for computing TAI time links. Precise point positioning (PPP) uses GPS dual frequency carrier phase and code measurements to compute the link between a local clock and a reference time scale with the precision of the carrier phase and the accuracy of the code. The time link between any two stations can then be computed by a simple difference. We show that this technique is well adapted and has better short-term stability than other techniques used in TAI. We present a method of combining PPP and two-way time transfer that takes advantage of the qualities of each technique, and shows that it would bring significant improvement to TAI links.

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