The Opening Phase of STAPP

1979 ◽  
pp. 61-77
Author(s):  
Peter E. Sifneos
Keyword(s):  
Opening Phase

scholarly journals The impact of COVID-19 restriction measures on loneliness among older adults in Austria

2020 ◽  
Author(s):  
Erwin Stolz ◽  
Hannes Mayerl ◽  
Wolfgang Freidl
Keyword(s):  
Mental Health ◽  
Older Adults ◽  
Positive Association ◽  
Health Issues ◽  
Negative Consequences ◽  
Cross Sectional ◽  
Social Contacts ◽  
Mental Health Issues ◽  
The Impact ◽  
Opening Phase

Abstract Background To halt the spread of COVID-19, Austria implemented a 7-week ’lockdown’ in March/April 2020. We assess whether the ensuing reduction in social contacts led to increased loneliness among older adults (60+). Methods Three analyses were conducted: (1) A comparison between pre-pandemic (SHARE: 2013-2017) and pandemic (May 2020) levels of loneliness (UCLA-3 scale), (2) an assessment of the cross-sectional correlation between being affected by COVID-19 restriction measures and loneliness (May 2020), and (3) a longitudinal analysis of weekly changes (March-June 2020) in loneliness (Corona panel). Results We found (1) increased loneliness in 2020 compared with previous years, (2) a moderate positive association between the number of restriction measures older adults were affected from and their loneliness, and (3) that loneliness was higher during ’lockdown’ compared to the subsequent re-opening phase, particularly among those who live alone. Conclusion We provide evidence that COVID-19 restriction measures in Austria have indeed resulted in increased levels of loneliness among older adults. However, these effects seem to be short-lived, and thus no strong negative consequences for older adults’ mental health are expected. Nonetheless, the effects on loneliness, and subsequent mental health issues, might be both more long-lasting and severe if future restriction measures are enacted repeatedly and/or over longer time periods.

An Experimental Investigation of Flow-Induced Cavity Resonance

2001 ◽  
Author(s):  
Paul J. Zoccola ◽  
Theodore M. Farabee
Keyword(s):  
Experimental Investigation ◽  
Energy Production ◽  
Pressure Fluctuations ◽  
Cavity Resonance ◽  
Cavity Pressure ◽  
Novel Technique ◽  
Cavity Opening ◽  
The Mean ◽  
Marine Applications ◽  
Opening Phase

Abstract Excitation of cavity resonance by flow over an aperture is often a source of unwanted noise in aerospace, automotive, and marine applications. An experimental investigation of this phenomenon was conducted. Detailed measurements of the cavity pressure and the velocity field in the opening were performed in a quiet flow facility. Spectral data on cavity pressure fluctuations obtained for a variety of configurations were analyzed over a range of speeds to determine the behavior of both sheartones and cavity tones during non-resonant and resonant conditions. The mean and fluctuating velocity profiles as well as the cross-spectral properties between the velocity components and cavity pressure were also obtained within the cavity opening. Phase between the velocity components and the pressure was used to calculate the streamwise convection velocities across the opening. A novel technique used to measure vorticity allowed calculation of the measured energy production in the opening. The data support the finding that the resonant and non-resonant conditions are distinguished by the behavior of the convection velocity and by the distribution of energy production in the flow field.

scholarly journals The anthochron as a building block of flower development

2016 ◽  
Vol 51 (8) ◽  
pp. 899-904
Author(s):  
Nereu Augusto Streck ◽  
Natalia Teixeira Schwab
Keyword(s):  
Building Block ◽  
Flower Development ◽  
Field Experiments ◽  
Linear Regression Analysis ◽  
Time Interval ◽  
Simple Linear Regression ◽  
Vegetative Development ◽  
Flower Opening ◽  
Factors Affecting ◽  
Opening Phase

Abstract: Plant vegetative development has been widely described using the phyllochron concept, but little effort has been made to describe flower development during the reproductive phase. The objective of this work was to present the anthochron, through a review of the literature, as a building block of flower development, mainly during the flower opening phase. The anthochron is the time interval needed for two subsequent flowers to achieve the same developmental stage, with units of time in days or in ºC day per flower. The concept of anthochron fulfills part of the lack of studies on flower development, since it is considered a building block of the flower opening process. The anthochron can be measured from field experiments or estimated by a simple linear regression analysis. So far, the anthochron has only been quantified in Gladiolus x grandiflorus Hort. Therefore, factors affecting the anthochron still need to be determined in order to pinpoint their effect on the flower opening rate.

scholarly journals Safety of Bariatric Surgery During the Opening Phase After the First Wave of the COVID-19 Pandemic: Experience at an Academic Center

2021 ◽  
Author(s):  
Fernando Crovari ◽  
Martin Inzunza ◽  
María J. Irarrázaval ◽  
Cecilia Romero ◽  
Pablo Achurra ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Academic Center ◽  
Opening Phase

Modification of mastication and respiration during swallowing in the adult human

1995 ◽  
Vol 74 (4) ◽  
pp. 1509-1517 ◽  
Author(s):  
D. H. McFarland ◽  
J. P. Lund
Keyword(s):  
Respiratory Rhythm ◽  
Phase Relationship ◽  
Head Movements ◽  
Rib Cage ◽  
Jaw Opening ◽  
Prolonged Apnea ◽  
Pattern Generators ◽  
Analysis System ◽  
Respiratory Movements ◽  
Opening Phase

1. The normal interactions between respiration, mastication, and swallowing were studied in seated adult humans. Respiratory movements and movements of the larynx were recorded with mercury-elastic strain gauges placed around the rib cage and neck. A rigid body containing infrared-emitting diodes (IREDs) was attached to the forehead, and a single IRED was applied to the chin. Jaw and head movements were transduced using the OPTOTRAK spatial motion analysis system. Recordings were made before, during, and after the mastication of pieces of carrot. 2. Movements of the larynx were used as a marker for swallowing. Measurements were made of the duration of masticatory and respiratory cycles, and the phase relationship between the two rhythms was determined. Deviations in masticatory and respiratory movements during swallowing were detected; the phases of the masticatory and respiratory cycles in which the deviations occurred were determined, and the interval between each deviation and the swallowing marker was calculated. 3. Three characteristic swallowing patterns were observed: interposed, terminal, and spontaneous. Interposed swallows occurred within a masticatory sequence, terminal swallows ended the sequence, and spontaneous swallows occurred sporadically between masticatory sequences. 4. Results revealed that mastication could have a profound effect on the respiratory rhythm in some subjects. One subject, whose data were excluded from further analyses, became apneic for a long period, followed by short and shallow breaths near the end of the masticatory sequence. In most subjects, respiratory rate increased during mastication and then dropped below baseline as soon as mastication ended. The end-inspiration diameter of the rib cage tended to decrease in the preswallow period and increase postmastication relative to baseline. 5. There was a weak but significant tendency for inspiration to begin during the jaw opening phase of mastication, but phase coupling did not become stronger as swallowing was approached. 6. Deviations in respiration during swallowing occurred during the late expiratory phase of the breathing cycle. Swallows within a masticatory sequence occurred most frequently during the early opening phase of the masticatory cycle, and terminal swallows occurred after the end of the sequence with the mandible in the resting, postural position. Swallowing temporarily reset both the masticatory and respiratory rhythms. Most swallows prolonged the duration of one or two respiratory cycles, however; swallows were often repetitive, and in some subjects two or three swallows fell within a single respiratory cycle, prolonging it for several seconds. 7. A tight temporal relationship was observed between deviations in respiration and the swallowing marker: all deviations occurred before or coincident with the marker. The time of deviations in mastication relative to the swallowing marker depended on swallow type. There was no link between the start of pauses in the two rhythms, suggesting that the commands from the swallowing central pattern generator to the other two pattern generators are independent. 8. We suggest that disordered coordination of mastication and swallowing with respiration may cause prolonged apnea in susceptible individuals.

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