Electrical signature in polar night cloud base variations

Layer clouds are globally extensive. Their lower edges are charged negatively by the fair weather atmospheric electricity current flowing vertically through them. Using polar winter surface meteorological data from Sodankyla ̈ (Finland) and Halley (Antarctica), we find that when meteorological diurnal variations are weak, an appreciable diurnal cycle, on average, persists in the cloud base heights, detected using a laser ceilometer. The diurnal cloud base heights from both sites correlate more closely with the Carnegie curve of global atmospheric electricity than with local meteorological measurements. The cloud base sensitivities are indistinguishable between the northern and southern hemispheres, averaging a (4.0 ± 0.5) m rise for a 1% change in the fair weather electric current density. This suggests that the global fair weather current, which is affected by space weather, cosmic rays and the El Nin ̃o Southern Oscillation, is linked with layer cloud properties

Are community forestry principles at work in Ontario’s County, Municipal, and Conservation Authority forests?

Ontario’s County, Municipal and Conservation Authority forests have received little attention within the academic literature on community forestry in Canada. These “Agreement Forests”, as they were once called, are a product of the early 20th century and have been under local government management since the 1990s. Most are situated in Southern Ontario. In this article we investigate the extent to which community forestry principles are at work in these forests. Three principles—participatory governance, local benefits and multiple forest use—are analyzed using a composite score approach derived from survey data collected from nearly all of these forest organizations (response rate = 80%). Results indicate that most of these organizations do display attributes associated with community forestry principles, including a local governance process, public participation activities, local employment and multiple-use management. Traditional forestry employment is less strong than in similar studies of Crown land community forests; however, there is an important emphasis on non-timber activities. The article concludes that the County, Municipal and Conservation Authority forests represents a unique approach, which reflects the specific geographic and socio-economic context in which it resides. / Les forêts cantonales, municipales et des offices de conservation de l’Ontario n’ont reçu qu’une faible couverture dans la littérature scientifique sur la foresterie communautaire au Canada. Ces « forêts d’entente (Agreement Forests) », comme on les appelait avant, ont été créées au début du XXe siècle et gérées par les autorités locales depuis les années 1990. La majeure partie de ces forêts sont situées dans le sud de l’Ontario. Dans cet article, nous cherchons à voir jusqu’à quel point les principes de foresterie communautaire sont mis en application dans ces forêts. L’étude porte sur trois principes – la gouvernance participative, les bénéfices locaux et l’utilisation polyvalente de la forêt – qui furent analysés avec l’approche de résultats combinés utilisant les données d’un sondage effectué auprès de presque toutes ces organisations forestières (taux de réponse = 80 %). Les résultats indiquent que la plupart de ces organisations présentent effectivement certains attributs rappelant les principes de la foresterie communautaire, incluant un processus de gouvernance locale, des activités de participation du public, l’embauche locale et l’aménagement à des fins d’utilisation polyvalente. Les emplois forestiers traditionnels ont moins d’importance que dans les études similaires des forêts communautaires établies sur des terres publiques; par contre, on accorde beaucoup d’importance aux activités sans prélèvement de bois. L’article conclut que les forêts cantonales, municipales et des offices de conservation constituent une approche unique qui reflète bien le contexte géographique et socio-économique spécifique dans lequel elles sont établies.Financial support from the Fonds québécois de la recherché sur la société et la culture and the Social Sciences and Humanities Research Council.http://pubs.cif-ifc.org/doi/10.5558/tfc2012-13

The genuine scientist-practitioner in vocational psychology: an autoethnography

This paper explores the notion of the scientist-practitioner in vocational psychology. It is suggested that despite the visage of science and technology, the actual practice of vocational psychology and career counselling is a very personal endeavour. The paper uses autoethnography to elucidate the construction of the career assessment and counselling procedure My Career Chapter. It is argued that the genuine creator of the procedure was not the chimerical scientist-practitioner; rather it was a sensitive rural, working-class boy who had transcended strictures of economic class and culture. His transformation inherently effected his doing the science and practice of vocational psychology. The paper suggests that the lamented divide between theory and practice in vocational psychology may be reduced through autoethnographic inquiry, which proffers a personal bridge between the two without diminishing commitment to orthodox forms of psychological science

Integration of baroreflex and autoregulation control of bronchial blood flow in awake dogs

Aim: Baroreflex control of the bronchial circulation is unresolved. Early studies suggested that baroreflexes dilate or have no effect, but recent studies in awake dogs suggested baroreflexes did not normally engage tonic vasoconstrictor efferents but during excitement systemic pressure rises may also trigger local sensory–motor dilator reflexes. We examined the postulate that bronchial flow is normally regulated at rest during controlled changes in pressure gradient (Pg) by integration of tonic autonomic activity with autoregulation. Methods: Twelve greyhounds were instrumented under general anaesthesia by surgical implantation of pulsed Doppler flow transducers on the right bronchial artery (BA). After recovery baroreflex effects were evoked by raising and lowering aortic pressure using a lower thoracic aortic balloon in 11 animals, and in six of these after cholinoceptor plus adrenoceptor blockade. Results: The right BA bed showed pressure-passive responses and the time-dependent bronchial bed effects in the autonomically intact state (INT) were largely similar to those in the blocked state (TAB). When results were replotted as pressure-flow relationships and analysed using covariance, the regression line over the pressure range 70–135 mmHg for TAB demonstrated a significant slope (P < 0.05), a linear regression elevated 120% (P = 0.006) above and parallel to INT (Y_Q = 0.034 + 0.00033(X_Pg − 104.6). The regression fell on the line of equal proportional change. Conclusion: Baroreflexes do not functionally engage the autonomic outflow to the bronchial circulation. Under controlled conditions of systemic Pg change, the bronchial circulation is normally controlled by the integration of resting autonomic tone, myogenic autoregulation and pressure-passive effects

Hope-narratives as a chaos theory of career intervention for failure

This paper is an explication of the conceptual underpinnings of a new, narrative career counselling method: fluttering-hope. The method presents a new approach to addressing repetition compulsion, a condition characterised by repeated career-destructive behaviour and experiences of failure. Fluttering-hope is formulated on the basis of the Chaos Theory of Career (CTC), a theory that explicitly acknowledges failure as a natural event in careers. A transtheoretical argument links failure, optimism, hope, psychodynamics, and CTC concepts of attractor and shift. Repetition compulsion is posited as a pendulum attractor and fluttering-hope is posited as a source of perturbation that may induce shift. The method takes a gentle approach to repetition compulsion, and regards it as a psychological mechanism to be treated with great care in career counselling. The paper includes recommendations for future research into the CTC, fluttering-hope, and mathematical modelling

Effect of fentanyl on baroreflex control of circumflex coronary conductance

Summary: 1. Fentanyl, a synthetic μ-opioid receptor agonist, is the preferred induction and maintenance anaesthetic agent in cardiac surgery. 2. Its actions on myocardial blood flow are poorly understood. There are reports of intra-operative myocardial ischaemia. Its reported actions on cardiorespiratory control vary widely, but do involve hypertension, bradycardia and peripheral vasoconstriction. 3. Accordingly, the postulate that fentanyl would cause coronary vasoconstriction and myocardial disadvantage was examined in awake dogs with a continuous wave Doppler flow probe mounted on the circumflex coronary artery. 4. Continuous intravenous infusion of fentanyl citrate (550 ng/kg per min) raised plasma concentrations of fentanyl to 3.37 ng/mL in a linear fashion at 20 min. There was a fall in core temperature of 0.7°C and, although no apparent depression of ventilation or fall in arterial or coronary sinus PO₂, there was a rise in PCO₂ and H⁺ concentration. Some dogs salivated and panted transiently. Thus, fentanyl may reset temperature regulation in low doses but, at higher doses, is associated with metabolic acidosis. 5. In sinus rhythm, the arterial pressure of the dogs fell slightly, then rose to 115% of resting control. Circumflex flow and conductance rose early, then conductance steadily declined to 83%. Heart rate fell, then rose before returning to pre-infusion levels. The early circumflex coronary vasodilator effects, but not the later vasoconstrictor effects, were reduced in dogs with paced hearts. 6. In dogs with paced hearts, a dose–effect study using 138, 275, 550 and 1100 ng/kg per min fentanyl suggested that, at low plasma concentrations of 1–2 ng/mL, vasodilatation does occur in both coronary and systemic circulations; however, at higher doses, intense coronary and systemic vasoconstriction supervenes. 7. The dose–response effect of fentanyl on arterial baroreflex control of circumflex conductance was examined during the immediate 8 s circumflex vasodilator response to a step rise in aortic pressure caused by inflation of an intra-aortic balloon. At low plasma concentrations of fentanyl, baroreflex control of circumflex conductance appears to be enhanced but, with increasing plasma concentrations of fentanyl, appears to be depressed. 8. Therefore, the effects of fentanyl are dose dependent. At low plasma concentrations, left ventricular blood flow and its baroreflex control is enhanced but, at higher concentrations, it is depressed