Suchergebnisse

Resilience has been identified as a protective factor that improves the ability to manage stress, promotes wellbeing and enables individuals to thrive in adverse circumstances. Many social auxiliary workers function independently with sporadic and brief supervision. Considering the stressful work environment that social auxiliary workers must face, it is essential that they be equipped to effectively manage the stressors of social work practice. The study identified how individual, social and environmental factors contribute to the participants' resilience and their ability to thrive in these challenging circumstances. The participants use their interpersonal, intrapersonal and organisational strengths and coping strategies to manage both their positive and challenging work experiences to remain both productive and resilient. Keywords: coping, intrapersonal strengths, interpersonal strengths, organisational strengths, resilience, social auxiliary work, social work

Twenty subjects performed five manual tasks barehanded during exposure to a 60°-F ambient temperature control condition, a 0°-F condition, and three ambient temperature conditions of 20°, 0°, and −20° F, in which auxiliary heat was applied to the hands. The tasks consisted of the Purdue Pegboard assembly, block-stringing, Minnesota Rate of Manipulation placing, knot-tying, and screw-tightening tasks and were performed after exposure durations of 0, 60, 120, and 180 min. Exposure to the 0°-F condition without auxiliary heat resulted in significant performance decrements on all tasks. The application of auxiliary heat to the hands resulted in the avoidance or alleviation of impaired performance during cold exposure depending upon the task, ambient temperature condition, and duration of exposure. The differential effects of auxiliary heat during cold exposure across manual performance tasks were related to the effects of auxiliary heat on hand skin temperature. These effects are discussed in terms of differential hand and finger dexterity, strength, and speed of movement requirements across tasks.

Terrain-scattered interference (TSI), that is, jammer signals reflected on the earth's surface, is a significant problem to military airborne radar. In auxiliary beam TSI suppression, the TSI in the main radar beam is estimated by a single or several auxiliary beams and is subtracted from the main beam channel. The signal to subtract is the auxiliary beam signals fed through an estimate of the 'reflection system', which describes scattering on the surface. The authors first present results on the structure of this TSI suppression, on the estimation of the reflection system and on the quality of the estimate. Then the authors derive theoretical expressions for the signal-to-interference plus noise ratio (SINR) and the remaining TSI power for a single auxiliary beam. Since the SINR is directly connected to the radar performance, it can be seen what factors affect the performance and how. It was noted that when the estimated reflection system is missing one or more delays of the true system, the TSI filter cannot suppress the TSI signal completely. This phenomenon, which is called 'TSI leakage', has a very large impact on the performance. The SINR cannot be kept constant. Instead, an 'SINR improvement' can be defined.