Search results for "flight"
showing 10 items of 372 documents
Angļu valoda stjuartiem: mācību grāmatu un tiešsaistes materiālu izvērtēšana
2019
Augsts angļu valodas prasmes līmenis ir viena no prasībām darbam aviācijas nozarē, kur angļu valoda ir darba valoda. Pētījumā tika izmantota gadījuma izpēte, kuras mērķis bija izvērtēt izvēlēto stjuartu angļu valodas mācību grāmatu un tiešsaistes materiālu lietderību valodas apguvei pašmācības ceļā. Pētījumā iesaistītie stjuarti vēlējās uzlabot visas valodu prasmes, kā arī uzskatīja, ka šādos materiālos ir jābūt iekļautiem ar gramatiku, leksiku un izrunu saistītiem uzdevumiem, pārbaudes darbiem, vizuāliem līdzekļiem, apgūstamo vārdu sarakstiem un dažādiem papildmateriāliem. Materiālu izvērtēšanas rezultāti norāda, ka, lai gan izvēlētajos materiālos ir iekļauti uz komunikāciju balstīti uzdev…
Good decision-making is associated with an adaptive cardiovascular response to social competitive stress.
2018
Competition elicits different psychological and cardiovascular responses depending on a person's skills. Decision-making has been considered a distal factor that influences competition, but there are no studies analyzing this relationship. Our objective was to analyze whether decision-making affects the response to competition. Specifically, we aimed to test whether good performers on a decision-making test, the Iowa Gambling Task (IGT), showed an adaptive cardiovascular response to competition. In all, 116 participants (44 women) performed the IGT and were classified into Good or Poor decision-makers. Subsequently, they were exposed to a stress task in two different conditions: a face-to-f…
European vestibular experiments on the Spacelab-1 mission: 7. Ocular counterrolling measurements pre- and post-flight.
1986
The static ocular counterrolling (OCR) of the four scientific crew members in the first Spacelab mission was measured during baseline-data-collection before and after the flight of SL-1. It was presumed that the modification of otolithic responses during spaceflight will be reflected in specific changes of the OCR-gain on the first days after recovery. The magnitude of OCR was determined analysing colour-transparencies of subjects right eyes that were produced in different positions of lateral body tilt. In general, one subject did not show any changes at all; three subjects exhibited a significant decrease of OCR-gain after exposure to weightlessness, whereby differences could be found bet…
The toxic and lethal effects of the trehalase inhibitor trehazolin in locusts are caused by hypoglycaemia
2003
SUMMARY The main blood sugar of locusts is trehalose, which is hydrolysed to two glucose units by trehalase. Homogenates of locust flight muscles are rich in trehalase activity, which is bound to membranes. A minor fraction of trehalase is in an overt form while the remainder is latent, i.e. active only after impairing membrane integrity. Trehazolin, an antibiotic pseudosaccharide,inhibits locust flight muscle trehalase with apparent Ki-and EC50 values of 10–8 mol l–1and 10–7 mol l–1, respectively. Trehazolin is insecticidal: 50 μg injected into locusts completely and selectively blocked the overt form of muscle trehalase (with little effect on latent activity) and killed 50% of the insects…
Electrodermal activity in response to a set of mental tasks in caregivers of persons with autism spectrum disorders
2011
IntroductionAnalysing reactivity to laboratory stressor in lab is a valid model for understanding how people act in real-life situations. Electrodermal activity is a good index of emotionality, which has not been analysed in caregivers of persons with Autism Spectrum Disorders (ASDs).Objectives and aimsThis work aims to compare the response of electrodermal activity to mental stress between caregivers of ASDs people and controls, as the former could show a different response due to their particular situation characterised by a state of continuous alert.MethodsParents of both genders of people with (n = 44) or without (n = 42) ASDs carried out a set of different mental tasks. Skin Conductanc…
Effects of rectilinear acceleration and optokinetic and caloric stimulations in space.
1984
During the flight of Spacelab 1 the crew performed a number of experiments to explore changes in vestibular function and visual-vestibular interactions on exposure to microgravity. Measurements were made on the threshold for detection of linear oscillation, vestibulo-ocular reflexes elicited by angular and linear movements, oculomotor and posture responses to optokinetic stimulations, and responses to caloric stimulation. Tests were also conducted on the ground, during the 4 months before and on days 1 to 6 after flight. The most significant result was that caloric mystagmus of the same direction as on the earth could also be evoked in the weightless environment.
European vestibular experiments on the Spacelab-1 mission: 1. Overview.
1986
During the flight of Spacelab-1 a series of vestibular experiments was performed on the crew by a group of European investigators. Control experiments were carried out on the same subjects pre- and postflight. The tests included caloric stimulation of the ears, threshold measurements of response to linear acceleration, motion sickness provocative stimuli, vestibulo-ocular reflexes during linear and angular stimulation, estimation of the subjective vertical (luminous line measurements) and static ocular counterrotation at various tilt angles. The caloric experiment proved the existence of a nonthermoconvective mechanism of caloric nystagmus in space. Most of the other test results point to a…
ADAPT - Advanced Prediction Models for Trajectory-Based Operations (TBO)
2018
Spatial Cognition 2020/1: Book of abstracts : August 2-4, 2021, University of Latvia
2021
Spatial Cognition is concerned with the acquisition, development, representation, organization, and use of knowledge about spatial objects in real, virtual or hybrid environments and processed by human or artificial agents. Spatial Cognition includes research from different fields insofar as they are concerned with cognitive agents and space, such as cognitive and developmental psychology, linguistics, computer science, geography, cartography, philosophy, neuroscience, and education. Research issues in the field range from the investigation of human spatial cognition to mobile robot navigation, including topics such as wayfinding, spatial planning, spatial learning, internal and external re…