Querying the Validity of Small-Signal Amplifier Conception

Signal source output resistance and negative feedback resistance all contribute to restrain transistor non-linearity and improve amplifier linearity. Amplifier sine output voltage and transistor emitting junction non-sine voltage coexist. Transistor emitting junction non-sine voltage is a by-product and doesn’t affect amplifier function. It was proved by experiment and in theory that the input signal magnitude in the basic common-emitter amplifier is not limited with small signal extent condition Ubem≤10mV, and output range is not limited with Ubem≤10mV. It was proved that small signal amplifier conception does not accord with the facts and might be not suitable.

AN EMPIRICAL EXPLORATION OF THE EFFECT OF PERSONALITY ON GENERAL AND JOB-RELATED MENTAL ILL HEALTH

In the present study it was empirically explored how work-situation dimensions, personality dimensions, and personality-by-situation interactions are related to burnout and general mental ill health. Questionnaire data from 694 subjects were analyzed using hierarchical multiple linear regression analyses. The results suggest that: (a) personality should not be disregarded in theoretical discussions and empirical studies of burnout and general mental ill health; (b) personality can, to some extent, condition how the work environment dimensions affect an individual with regard to various aspects of burnout and general mental ill health; (c) attention should be given to the fact that some measures of burnout and mental ill health are more dependent on situational factors while other measures are more dependent on personality factors.

The state of Canada's municipal forests – 1996 to 1998

Urban forests are the day-to-day interface between most Canadians and their natural environment. In spite of the many benefits derived from our urban forests, relatively little is understood about their extent, condition and level of management. The results of a survey of Canadian municipalities is used to summaries the level of management and planning in the country's municipally managed forests. The survey indicated that many communities do not have inventories or management plans and the level of funding for the maintenance of municipal forests are insufficient to sustain a supply of benefits to the community. Key words: urban forestry, inventory, planning, budgets