STATISTICAL AUTOMATIC STATICS ANALYSIS

Geophysics ◽  
1970 ◽  
Vol 35 (4) ◽  
pp. 574-585 ◽  
Author(s):  
David Alan Disher ◽  
Paul J. Naquin
Keyword(s):  
Correlation Functions ◽  
Time Windows ◽  
Independent Sets ◽  
Extensive Experience ◽  
Systematic Analysis ◽  
Time Jitter ◽  
Static Corrections ◽  
Correlation Statistics ◽  
Theoretical Considerations

From theoretical considerations and extensive experience, we show that proper weathering statics can be computed by use of a systematic analysis of correlation statistics. Time jitter on individual traces due to weathering variations, variations in shot depth, and trace reversals can be determined and corrected for in the presence of interference due to noise, dip, and improper normal‐moveout corrections. Four independent sets of statistics, requiring two time windows for shot‐oriented data and two time windows for receiver‐oriented data, are used to determine static corrections at the shot and at the receiver. To determine shot statics, we correlate pairs of traces from the same receivers and consecutive shots. Pairs of traces from consecutive receivers and the same shots are correlated to determine receiver statics. These two sets of correlation functions are viewed statistically to determine the two subsets of functions needed for the ensuing analysis. The functions remaining after rejection of those deviating greatly from the average values are summed in groups by receiver and by shot order. The resultant peaks yield two sets of differential statics. A cumulative total of the differential statics is computed. Subtraction of the low wavenumber part of the cumulative total, which is the dip, from the cumulative total yields residual shot and receiver weathering statics.

scholarly journals Framework for patient-ventilator asynchrony during long-term non-invasive ventilation

Thorax ◽  
2019 ◽  
Vol 74 (7) ◽  
pp. 715-717 ◽  
Author(s):  
Jesus Gonzalez-Bermejo ◽  
Jean-Paul Janssens ◽  
Claudio Rabec ◽  
Christophe Perrin ◽  
Frédéric Lofaso ◽  
...  
Keyword(s):  
Present Report ◽  
Time Windows ◽  
Clinical Impact ◽  
Positive Pressure ◽  
Systematic Analysis ◽  
Non Invasive ◽  
Non Invasive Ventilation ◽  
Polygraphic Recordings ◽  
Bench Testing

Episodes of patient-ventilator asynchrony (PVA) occur during acute and chronic non-invasive positive pressure ventilation (NIV). In long-term NIV, description and quantification of PVA is not standardised, thus limiting assessment of its clinical impact. The present report provides a framework for a systematic analysis of polygraphic recordings of patients under NIV for the detection and classification of PVA validated by bench testing. The algorithm described uses two different time windows: rate asynchrony and intracycle asynchrony. This approach should facilitate further studies on prevalence and clinical impact of PVA in long-term NIV.

scholarly journals Ken Loach and the Comedians: The Politics of ‘Acting’

2021 ◽  
Vol 18 (3) ◽  
pp. 280-302
Author(s):  
Neil Archer
Keyword(s):  
Systematic Analysis ◽  
The 1960S ◽  
Film Making ◽  
Ken Loach ◽  
Theoretical Considerations

This article explores a gap in the scholarship on Ken Loach's film-making, focusing on his casting of comedians in central roles and the specific impacts of such casting strategies across Loach's work. While the relevance of such casting to Loach's project has been anecdotally acknowledged in criticism, this article recommends a more systematic historical and aesthetic approach. After summarising the theoretical considerations around acting as a practice and its ‘problem’ within Loach's terms, I consequently look at the broader institutional and political contexts of actor preparation training and casting in British television and film since Loach's emergence as a director in the 1960s, and the relevance of comedian casting within these. Drawing on a sample of Loach's films, I then offer a more systematic analysis of how the comedian's body, voice and action signify, examining how such ‘realist’ performances respond to the cultural conventions of ‘trained’ actor practice, as well as the narrative and broader institutional conventions of comedy performance in mainstream film.

scholarly journals Systematic investigation of skill opportunities in decadal prediction of air temperature over Europe

2021 ◽  
Author(s):  
Giovanni Sgubin ◽  
Didier Swingedouw ◽  
Leonard F. Borchert ◽  
Matthew B. Menary ◽  
Thomas Noël ◽  
...  
Keyword(s):  
Air Temperature ◽  
Time Windows ◽  
Systematic Investigation ◽  
Added Value ◽  
Prediction Skill ◽  
Adaptation To Climate Change ◽  
Calendar Time ◽  
Systematic Analysis ◽  
Near Term ◽  
The 1960S

Abstract Decadal Climate Predictions (DCP) have gained considerable attention for their potential utility in promoting optimised plans of adaptation to climate change and variability. Their effective applicability to a targeted problem is nevertheless conditional on a detailed evaluation of their ability to simulate the near-term climate evolution under specific conditions. Here we explore the performance of the IPSL-CM5A-LR DCP system in predicting air temperature over Europe, by proposing a systematic assessessment of the prediction skill for different time windows (periods of the calendar time, forecast years and months/seasons). In this framework, we also compare raw and de-biased hindcasts, in which the temperature outputs have been corrected using a quantile matching method. The systematic analysis allows to discern certain conditions conferring larger predictability, which we find to be intermittent in time. The predictions appear more skilful around the 1960s and after the 1980s, in coincidence with large shifts of the Atlantic Multidecadal Variability, which are well reproduced in the hindcasts. Averages on longer forecast periods also generally imply better prediction skill, while the best predicted months appear to be mainly those between late spring and early autumn. Moreover, we find an overall added value due to initialisation, while de-biased predictions significantly outperform raw predictions only for a few specific time windows. Finally, we discuss the potential implications of the proposed systematic exploration of skill opportunities in DCPs for integrated applications in climate sensitive sectors.

scholarly journals Le choix du mode d’occupation sur le marché du logement à Montréal : influence de l’origine ethnique

2009 ◽  
Vol 54 (1) ◽  
pp. 46-58
Author(s):  
Alain Laporte
Keyword(s):  
Statistical Data ◽  
Cultural Factors ◽  
Housing Conditions ◽  
French Canadians ◽  
Systematic Analysis ◽  
The Third ◽  
Theoretical Considerations

The housing conditions in Montreal are mainly characterized by the two following features: firstly, the high percentage of tenants, secondly, the excessively high proportion of French Canadians in that type of tenure. In spite of this important disequilibrium, there are few systematic analysis of the economic, demographic or cultural factors explaining such a phenomenon. The following paper is aimed at filling this gap. The first part deals with theoretical considerations; the second part contains the specification of the model, the method of estimation and the statistical data used for the estimation; the third part analyses the results and brings up the main conclusions.

Preparatory Procedures for Electron Microscopic Analysis at the Molecular Level of Resolution

1978 ◽  
Vol 36 (3) ◽  
pp. 516-520
Author(s):  
F.J. Sjostrand
Keyword(s):  
Electron Microscope ◽  
Molecular Level ◽  
Microscopic Analysis ◽  
Resolving Power ◽  
Cellular Structures ◽  
Electron Microscopic ◽  
Systematic Analysis ◽  
Technical Developments ◽  
Thin Sectioning ◽  
Obvious Reason

In the 1940's and 1950's electron microscopy conferences were attended with everybody interested in learning about the latest technical developments for one very obvious reason. There was the electron microscope with its outstanding performance but nobody could make very much use of it because we were lacking proper techniques to prepare biological specimens. The development of the thin sectioning technique with its perfectioning in 1952 changed the situation and systematic analysis of the structure of cells could now be pursued. Since then electron microscopists have in general become satisfied with the level of resolution at which cellular structures can be analyzed when applying this technique. There has been little interest in trying to push the limit of resolution closer to that determined by the resolving power of the electron microscope.

The Biological Clock and Sleep in the Elderly

2006 ◽  
Vol 19 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Myriam Juda ◽  
Mirjam Münch ◽  
Anna Wirz-Justice ◽  
Martha Merrow ◽  
Till Roenneberg
Keyword(s):  
Circadian Rhythms ◽  
Biological Clock ◽  
The Elderly ◽  
Early Morning ◽  
Behavioral Changes ◽  
Older Age ◽  
Age Related ◽  
Theoretical Considerations ◽  
Sleep Difficulties ◽  
Circadian Biology

Abstract: Among many other changes, older age is characterized by advanced sleep-wake cycles, changes in the amplitude of various circadian rhythms, as well as reduced entrainment to zeitgebers. These features reveal themselves through early morning awakenings, sleep difficulties at night, and a re-emergence of daytime napping. This review summarizes the observations concerning the biological clock and sleep in the elderly and discusses the documented and theoretical considerations behind these age-related behavioral changes, especially with respect to circadian biology.

Sign in / Sign up

Export Citation Format

Share Document