Possible experimental test to determine the role of microscopic vortex rings in the λ transition in helium II

2005 ◽  
Vol 31 (5) ◽  
pp. 365-370 ◽  
Author(s):  
M. D. Tomchenko
Keyword(s):  
Experimental Test ◽  
Vortex Rings ◽  
Helium Ii

scholarly journals An experimental test of the effects of online and face-to-face feedback on self-esteem

2017 ◽  
Vol 11 (4) ◽  
Author(s):  
Helen G. M. Vossen ◽  
Maria Koutamanis ◽  
Joseph B. Walther
Keyword(s):  
Negative Feedback ◽  
Experimental Test ◽  
Indirect Effect ◽  
Online Communication ◽  
Self Esteem ◽  
Communication Mode ◽  
Self Disclosure ◽  
Face To Face ◽  
Negative Comments

This study investigated the effect of receiving confirming vs. disconfirming feedback to individuals’ self-disclosure on their self-esteem, the role of giving reciprocal feedback in this relationship, and how these effects differ between online and face-to-face communication. Using a two (communication mode: online vs. face-to-face) by two (feedback valence: confirming vs. disconfirming) between-subjects experiment, we found that feedback had a significant indirect effect on self-esteem, through the receiver’s reciprocal feedback. This indirect effect of feedback differed in online communication from offline: In online communication, participants reciprocated negative feedback when they received it, more than in face-to-face communication. The reciprocal feedback enhanced their self-esteem in online communication, but not in face-to-face communication. Although people tend to respond more negatively to negative comments in online conversations, the process, overall, boosts rather than hinders their self-esteem.

scholarly journals Increasing photoperiod stimulates the initiation of spring migratory behaviour and physiology in a facultative migrant, the pine siskin

2018 ◽  
Vol 5 (8) ◽  
pp. 180876 ◽  
Author(s):  
Ashley R. Robart ◽  
Mali M. K. McGuire ◽  
Heather E. Watts
Keyword(s):  
Experimental Test ◽  
Spring Migration ◽  
Fat Deposition ◽  
Day Length ◽  
Environmental Cues ◽  
Migratory Restlessness ◽  
Migratory Behaviour ◽  
Behavioural Changes ◽  
Short Day

The transition to a migratory state involves coordinated changes in physiology and behaviour. In species with regular, predictable (obligate) migrations, increasing day length triggers the expression of a spring migratory state and androgens play an important role in stimulating its development. By contrast, we know little about the environmental cues and endocrine mechanisms that regulate migration in species with less predictable (facultative) migrations. Here, we tested whether photoperiod stimulates a migratory state in a facultative nomadic migrant, the pine siskin ( Spinus pinus ). We exposed wintering birds to either a naturally increasing or short-day photoperiod and measured physiological and behavioural changes indicative of a migratory state. We also examined changes in circulating hormones that may play a role in the migratory transition. Natural-day, but not short-day, birds displayed physiological preparations for migration, including increases in fat deposition, and showed increased levels of migratory restlessness. We found no evidence for a role of corticosterone in the migratory transition, but testosterone may be important. This study is the first experimental test of the role of photoperiod in regulating facultative migration and demonstrates that the predictive cue used by many obligate migrants to time spring migration is also important in a facultative migrant.

An Experimental Test of the Role of Alcohol in Relationship Conflict

2000 ◽  
Vol 36 (2) ◽  
pp. 182-193 ◽  
Author(s):  
Geoff MacDonald ◽  
Mark P Zanna ◽  
John G Holmes
Keyword(s):  
Experimental Test ◽  
Relationship Conflict

Motion of charged vortex rings in helium II

1991 ◽  
Vol 67 (18) ◽  
pp. 2505-2508 ◽  
Author(s):  
David C. Samuels ◽  
Russell J. Donnelly
Keyword(s):  
Vortex Rings ◽  
Helium Ii
Sign in / Sign up

Export Citation Format

Share Document