Showing papers by "McGill University published in 1988"
TL;DR: The authors provided an analytical treatment of the construct and integrated the diverse approaches to empowerment found in both the management and psychology literatures, identifying certain antecedent conditions of powerlessness and practices that have been hypothesized to empower subordinates.
Abstract: Despite increasing attention on the topic of empowerment, our under-standing of the construct and its underlying processes remains limited. This article addresses these shortcomings by providing an analytical treatment of the construct and by integrating the diverse approaches to empowerment found in both the management and psychology literatures. In addition, the authors identify certain antecedent conditions of powerlessness and practices that have been hypothesized to empower subordinates.
3,796 citations
TL;DR: A novel mechanism of initiation on poliovirus RNA occurs by binding of ribosomes to an internal sequence within the 5′ noncoding region, which may explain the disparate translation of several other eukaryotic messenger RNAs.
Abstract: Poliovirus RNA is naturally uncapped, therefore its translation must proceed via a cap-independent mechanism. Translation initiation on poliovirus RNA occurs by binding of ribosomes to an internal sequence within the 5' noncoding region. This novel mechanism of initiation may explain the disparate translation of several other eukaryotic messenger RNAs.
1,926 citations
TL;DR: This article investigated the relationships of Porter's business strategies to the structures and environments of undiversified firms and showed that strategies must be matched with complementary strategies. But they did not consider the relationship between the two.
Abstract: This study investigated the relationships of Porter's business strategies to the structures and environments of undiversified firms. It was shown that strategies must be matched with complementary ...
1,223 citations
TL;DR: A subtle manipulation early in life can retard the emergence of a complex degenerative cascade of aging in the rat, including glucocorticoid hypersecretion, hippocampal neuron death, and cognitive impairments.
Abstract: In rats, an environmental manipulation occurring early in life resulted in changes in the adrenocortical axis that persisted throughout the entire life of the animals and attenuated certain deficits associated with aging. Rats handled during infancy had a permanent increase in concentrations of receptors for glucocorticoids in the hippocampus, a critical region in the negative-feedback inhibition of adrenocortical activity. Increased receptor concentrations led to greater hippocampal sensitivity to glucocorticoids and enhanced negative-feedback efficacy in the handled rats. Thus, at all ages tested, rats that were not handled secreted more glucocorticoids in response to stress than did handled rats. At later ages, nonhandled rats also showed elevated basal glucocorticoid levels, with the result that there was a greater cumulative exposure to glucocorticoids in nonhandled rats. Increased exposure to adrenal glucocorticoids can accelerate hippocampal neuron loss and cognitive impairments in aging. Hippocampal cell loss and pronounced spatial memory deficits emerged with age in the nonhandled rats, but were almost absent in the handled rats. Previous work showed that glucocorticoid hypersecretion, hippocampal neuron death, and cognitive impairments form a complex degenerative cascade of aging in the rat. The present study shows that a subtle manipulation early in life can retard the emergence of this cascade.
1,062 citations
TL;DR: This paper investigates how the use of a channel with perfect authenticity but no privacy can be used to repair the defects of a channels with imperfect privacy but no authenticity.
Abstract: In this paper, we investigate how the use of a channel with perfect authenticity but no privacy can be used to repair the defects of a channel with imperfect privacy but no authenticity. More preci...
947 citations
TL;DR: In the last few years heavy ion experiments have addressed key questions regarding the behavior of nuclear matter at high excitation and density as discussed by the authors, which has been achieved by the formulation of calculational tools to apply microscopic models to experimental observables.
905 citations
TL;DR: Optimisation de la cinematique d'un manipulateur utilisant un mecanisme parallele spherique a trois degres de liberte.
Abstract: Optimisation de la cinematique d'un manipulateur utilisant un mecanisme parallele spherique a trois degres de liberte
812 citations
Book•
19 Aug 1988TL;DR: Conger as discussed by the authors reveals how the charismatic leader's qualities of creativity, inspiration, unconventionality, vision, and risk-taking can help bring about radical change in organizations damaged by long periods of inertia and shows why we need charismatic leadership now more than ever before.
Abstract: In this new book, Jay A. Conger reveals how the charismatic leader's qualities of creativity, inspiration, unconventionality, vision, and risk-taking can help bring about radical change in organizations damaged by long periods of inertia - and shows why we need charismatic leadership now more than ever before. Drawing on findings from organizational behavior, sociology, social psychology, political science, and his own research - as well as on illustrations from the careers of Steve Jobs, Lee Iacocca, Mary Kay, John DeLorean, Ross Perot, and others - the author dispels the myths about charisma and identifies the specific practices that set charismatic leadership apart to help show how and why these individuals succeed where others may fail.
796 citations
TL;DR: Meta-analysis predicted that a team of physicians and nonphysicians using multiple intervention modalities to deliver individualized advice on multiple occasions would produce the best result in controlled smoking cessation trials.
Abstract: Meta-analysis was used to examine 108 intervention comparisons in 39 controlled smoking cessation trials. Type of intervention (face-to-face advice being better than all others), type of intervenor (both physician and nonphysician counselors better than either alone), the number of reinforcing sessions, and the duration of reinforcing sessions were related to success six months after the initiation of intervention. The number of modalities used by the intervention predicted success with borderline statistical significance. Multivariate analysis predicted that a team of physicians and nonphysicians using multiple intervention modalities to deliver individualized advice on multiple occasions would produce the best result. Program success 12 months after the initiation of intervention was related to the type of intervention session (group and individual sessions combined better than either alone), the number of intervention modalities, and the number of reinforcing sessions. With multivariate adjustment for confounding, the number of intervention modalities alone had a positive association with intervention success. ( JAMA 1988;259:2882-2889)
761 citations
609 citations
TL;DR: There is strong localized sequence identity between these two receptors in both the extracellular and cytoplasmic domains, suggesting that the two receptors originated from a common ancestor.
TL;DR: In this article, the authors considered a simplified problem involving the steady two-dimensional flow of a binary mixture of small and large spherical particles flowing down a roughened inclined chute.
Abstract: If granular materials comprising particles of identical material but different sizes are sheared in the presence of a gravitational field, the particles are segregated according to size. The small particles fall to the bottom and the larger ones drift to the top of the sheared layer. In an attempt to isolate and study some of the essential segregation mechanisms, the paper considers a simplified problem involving the steady two-dimensional flow of a binary mixture of small and large spherical particles flowing down a roughened inclined chute. The flow is assumed to take place in layers that are in motion relative to one another as a result of the mean shear. For relatively slow flows, it is proposed that there are two main mechanisms responsible for the transfer of particles between layers. The first mechanism, termed the ‘random fluctuating sieve’, is a gravity-induced, size-dependent, void-filling mechanism. The probability of capture of a particle in one layer by a randomly generated void space in the underlying layer is calculated as a function of the relative motion of the two layers. The second, termed the ‘squeeze expulsion’ mechanism, is due to imbalances in contact forces on an individual particle which squeeze it out of its own layer into an adjacent one. It is assumed that this mechanism is not size preferential and that there is no inherent preferential direction for the layer transfer. This second physical mechanism in particular was proposed on the basis of observations of video recordings that were played back at slow speed. Since the magnitude of its contribution is determined by the satisfaction of overall mass conservation, the exact physical nature of the mechanism is of less importance. By combining these two proposed mechanisms the net percolation velocity of each species is obtained. The mass conservation equation for fines is solved by the method of characteristics to obtain the development of concentration profiles with downstream distance. Although the theory involves a number of empirical constants, their magnitude can be estimated with a fair degree of accuracy. A solution for the limiting case of dilute concentration of fine particles and a more general solution for arbitrary concentrations are presented. The analyses are compared with experiments which measured the development of concentration profiles during the flow of a binary mixture of coarse and fine particles down a roughened inclined chute. Reasonable agreement is found between the measured and predicted concentration profiles and the distance required for the complete separation of fine from coarse particles.
Book•
19 Aug 1988TL;DR: Charismatic and non-charismatic leaders: Differences in Behavior and Effectiveness Part Two: Strategic Vision and the Charismatic Leader 5 The Visionary Leader 6 Profiles of Strategic Vision: Levesque and Iacocca Part Three: The Sources and Limitations of Charisma 7 Two Faces of Charisma: Socialized and Personalized Leadership in Organizations 8 Origins of Charisma as discussed by the authors.
Abstract: Introduction: Problems and Prospects in Understanding Charismatic Leadership Part One: The Nature and Dynamics of Charismatic Leadership 1 Theoretical Foundations of Charismatic Leadership 2 Evolving Perspectives on Charismatic Leadership 3 Behavioral Dimensions of Charismatic Leadership 4 Charismatic and Non-Charismatic Leaders: Differences in Behavior and Effectiveness Part Two: Strategic Vision and the Charismatic Leader 5 The Visionary Leader 6 Profiles of Strategic Vision: Levesque and Iacocca Part Three: The Sources and Limitations of Charisma 7 Two Faces of Charisma: Socialized and Personalized Leadership in Organizations 8 Origins of Charisma: Socialized and Personalized Leadership in Organizations 9 Limits of Charisma Part Four: Development of Charismatic Leaders 10 Developiing Transformational Leaders: A Life Span Approach 11 Training Charismatic Leadership: A Risky and Critical Task Conclusion: Patterns and Trends in Studying Charismatic Leadership
TL;DR: The results demonstrated that the rostral part of the superior temporal gyrus projects to the proisocortical areas of the orbital and medial frontal cortex, as well as to the nearby orbital areas 13, 12, and 11, and to medial areas 9, 10, and 14.
Abstract: The projections to the frontal cortex that originate from the various areas of the superior temporal region of the rhesus monkey were investigated with the autoradiographic technique. The results demonstrated that the rostral part of the superior temporal gyrus (areas Pro, Ts1, and Ts2) projects to the proisocortical areas of the orbital and medial frontal cortex, as well as to the nearby orbital areas 13, 12, and 11, and to medial areas 9, 10, and 14. These fibers travel to the frontal lobe as part of the uncinate fascicle. The middle part of the superior temporal gyrus (areas Ts3 and paAlt) projects predominantly to the lateral frontal cortex (areas 12, upper 46, and 9) and to the dorsal aspect of the medial frontal lobe (areas 9 and 10). Only a small number of these fibers terminated within the orbitofrontal cortex. The temporofrontal fibers originating from the middle part of the superior temporal gyrus occupy the lower portion of the extreme capsule and lie just dorsal to the fibers of the uncinate fascicle. The posterior part of the superior temporal gyrus projects to the lateral frontal cortex (area 46, dorsal area 8, and the rostralmost part of dorsal area 6). Some of the fibers from the posterior superior temporal gyrus run initially through the extreme capsule and then cross the claustrum as they ascend to enter the external capsule before continuing their course to the frontal lobe. A larger group of fibers curves round the caudalmost Sylvian fissure and travels to the frontal cortex occupying a position just above and medial to the upper branch of the circular sulcus. This latter pathway constitutes a part of the classically described arcuate fasciculus.
TL;DR: A mathematically based, systematic and generally applicable procedure to search for a reserve-feasible dual solution for power system generator unit commitment, giving reliable performance and low execution times.
Abstract: A Lagrangian relaxation algorithm for power system generator unit commitment is proposed. The algorithm proceeds in three phases. In the first phase, the Lagrangian dual of the unit commitment is maximized by standard subgradient techniques. The second phase finds a reserve-feasible dual solution, followed by a third phase of economic dispatch. A mathematically based, systematic and generally applicable procedure to search for a reserve-feasible dual solution is presented. The algorithm has been tested on systems of up to 100 units to be scheduled over 168 hours, giving reliable performance and low execution times. Both spinning and time-limited reserve constraints are treated. >
TL;DR: The positive predictive values of the LNMP GA estimates decreased dramatically from term to preterm to postterm, and the systematic errors in menstrual GA estimates have profound implications for unnecessary induction, dysfunctional labor and cesarean section, and resultant neonatal and maternal morbidity.
Abstract: Despite recognition that estimation of gestational age (GA) based on maternal recollection of the last normal menstrual period (LNMP) is fraught with error, it is not generally appreciated that the magnitude and direction of this error vary as a function of the LNMP estimate Early second-trimester (16 to 18 weeks) ultrasound determinations of the fetal biparietal diameter were used as the "gold standard" to test the validity of LNMP-based GA estimates in 11 045 women The large majority of deliveries occurring at or near term showed LNMP estimates that were valid within plus or minus seven days of the ultrasound estimate As the LNMP GA deviated progressively toward earlier or later GAs, however, the discrepancies became quite marked, especially for postterm dates The positive predictive values of the LNMP GA estimates decreased dramatically from term (949) to preterm (775) to postterm (119) deliveries These systematic errors in menstrual GA estimates have profound implications for unnecessary induction, dysfunctional labor and cesarean section, and resultant neonatal and maternal morbidity ( JAMA 1988;260:3306-3308)
TL;DR: This study concentrates on the unbiased estimation of lung volume using Cavalieri's principle compared with the fluid displacement method and measurement of pleural surface area using vertical sections.
Abstract: A practical methodology is proposed for the stereological analysis of lung and other organs using recently developed unbiased procedures. This study concentrates on the unbiased estimation of lung volume using Cavalieri's principle compared with the fluid displacement method and measurement of pleural surface area using vertical sections. Furthermore, the proposed design, in addition to the sampling of extensive slices for the initial steps, also allows sampling of vertical sections for light and electron-microscopical stereology. The procedures are described in detail by reference to biological data from the right lungs of four rabbits. We found excellent agreement between estimates of lung volume measured with Cavalieri's principle and those measured by fluid displacement. Pertinent details of the statistical analysis of the sources of variation (namely biological, systematic sectioning and point-counting variation) are given in an appendix.
Journal Article•
TL;DR: The RNL index appears to assess global function and measures both the patient's perceptions of their own capabilities and objective indicators of physical, social, and psychologic performance.
TL;DR: Algal biomass of Sargassum natans and Ascophyllum nodosum outperformed ion exchange resins in sequestering respectively gold and cobalt from solutions and non-living biomass ofSaccharomyces cerevisiae andRhizopus arrhizus exhibited higher metal-uptake capacity than the living biomass for the uptake of copper, zinc, cadmium, uranium.
Abstract: Biosorbent materials are a potential alternative to conventional processes of metal recovery from industrial solutions. Algal biomass ofSargassum natans andAscophyllum nodosum outperformed ion exchange resins in sequestering respectively gold and cobalt from solutions. Non-living biomass ofSaccharomyces cerevisiae andRhizopus arrhizus exhibited higher metal-uptake capacity than the living biomass for the uptake of copper, zinc, cadmium, uranium. The solution pH affected the metal-uptake capacity of the biomass whereas the equilibrium biosorption isotherms were independent of the initial concentration of the metal in the solution. Desorption of the metal from the biosorbent and recycle of the biosorbent have also been demonstrated.
TL;DR: The CES-D's factorial composition was highly similar to that observed among community volunteers and this pattern did not change despite differences in physical health and illness.
Abstract: Psychometric properties of the Center for Epidemiologic Studies Depression (CES-D) scale were examined among five groups that vaned in physical health and illness. Participants included 175 healthy undergraduates, 176 individuals attending family physicians, 107 progressive renal disease, 135 end-stage renal disease, and 120 cancer patients. Individual item and total CES-D scores were relatively symmetrically distributed and varied across the entire range of potentially obtainable scores. Reliability analyses yielded internal consistency (alpha) coefficients ranging from 0.63 to 0.93 across the groups. Test-retest reliability (3-month lag) was 0.61. The CES-D's factorial composition was highly similar to that observed among community volunteers. Varimax-rotated principal-components analyses extracted four factors, corresponding to “depressive affect”, “positive affect”, “somatic and retarded activity”, and “interpersonal”. Moreover, this pattern did not change despite differences in physical heal...
TL;DR: In this paper, the authors review mechanisms by which parasitic infections can influence the survival, re-production, and movement patterns of infected individuals and discuss the implications for host populations, in par- ticular with reference to the potential ofparasites to regulate the abundance of host populations.
Abstract: The distinction between infection and disease may be subtle, and detection of disease in wild animalpop- ulations depends on the sophistication of sampling design and diagnostic techniques used in examining animal pop- ulations. The impact of infection on the host is dependent not only on the pathogenicity of the infection but also on the interactions between infection and otherfactors such as nu- tritional status and stress. In this paperI review mechanisms by which parasitic infections can influence the survival, re- production, and movement patterns of infected individuals. I then discuss the implications for host populations, in par- ticular with reference to thepotential ofparasites to regulate the abundance of host populations. The implications of in- fection and disease on hostpopulations are then extended to demonstrate consequences on community structure. Diffi- culties associated with assessing the level of infection or dis- ease in wild animal populations are discussed and used to account for the frequently held belief that disease rarely oc- curs in wild animal populations. Finally, the consequences of infection and disease for conservation biology are out- lined. Disease is considered with regard to introductions and maintenance of genetic diversity. Emphasis is placed on the dangers associated with forcing animals into high-density situations. High host densities lead directly to increased dis- ease because of increased transmission rates, and also indi- rectly increase disease because of synergistic interactions be- tween infection, reduced nutritional status of the host population, and increased stress all associated with high- density situations. I recommend a surveillance program for monitoring prevalence or intensity in selected indicator age classes as a first step for preventing major disease problems in animalpopulations. I conclude that infection and disease will be an important determinant of the health and well- being of animal populations, and as such must be consid- ered in the design of conservation policy. RESUMEN: La distincion entre infeccion y enfermedad
TL;DR: It is suggested that antidepressants acquire anxiolytic properties following chronic administration and that this effect appears to be independent of the benzodiazepine receptor system.
Abstract: We have examined the anxiolytic activity of acute and chronic antidepressant treatment in an animal model of anxiety involving novelty-suppressed feeding. Rats were food deprived for 48 h, placed into a novel environment containing food, and the latency to begin eating was recorded. Chronic (21 days), but not acute injections of desipramine (DMI; 10 mg/kg) and amitriptyline (AMI; 10 mg/kg) significantly reduced the latency to begin eating compared to controls, but the percentage decrease was not as great as that seen with either acute or chronic treatment with diazepam (2 mg/kg) or adinazolam (20 mg/kg). A time course study indicated that at least 2 weeks of treatment was necessary to observe a significant anxiolytic effect of antidepressants. The anxiolytic effect of the antidepressants was specific to the novel environment, as 2 weeks of treatment with either diazepam or DMI did not influence the latency to begin eating in the home cage. Finally, a single dose of the central benzodiazepine receptor antagonist, Ro15-1788 (20 mg/kg), given 15 min prior to testing, did not block the anxiolytic effects of chronic DMI, while it completely eliminated the effect of chronic diazepam treatment. These data suggest that antidepressants acquire anxiolytic properties following chronic administration and that this effect appears to be independent of the benzodiazepine receptor system.
TL;DR: In this paper, the authors provide a conceptual framework for understanding industrial crises, which are organizationally-based disasters which cause extensive damage and social disruption, involve multiple stakeholders, and unfold through complex technological, organizational and social processes.
Abstract: This article provides a conceptual framework for understanding industrial crises. These crises are organizationally-based disasters which cause extensive damage and social disruption, involve multiple stakeholders, and unfold through complex technological, organizational and social processes. The characteristics of industrial crises are illustrated through a comparison of three diverse crises - the Bhopal disaster, the Tylenol poisonings, and the explosion of the space shuttle Challenger. Relationships among these characteristics are presented in a model of industrial crisis. Some issues for further research are identified.
TL;DR: The results suggest that despite pronounced differences between recording methods, parental diaries of infants' cry and fuss behaviour may provide valid and useful reports of crying and fussing in the short term.
Abstract: Despite their common use parental diaries of infants' cry and fuss behaviour have not been compared with objective methods of recording. To understand what is meant by the descriptions of crying and fussing in the diaries, the diaries of 10 mothers of 6 week old infants were compared with tape recordings of vocalisations made by the babies over a 24 hour period. There were moderately strong correlations between the frequency of episodes (clusters of 'negative vocalisations') on the audiotape and episodes of 'crying and fussing' in the diaries, and between the duration of episodes on the audiotape and episodes of 'crying' in the diaries. To assess the acceptability of the diaries for recording information for clinical and epidemiological research, they were then used in a population study of a wide socioeconomic group. Usable data were obtained from 91% of the sample. The results suggest that despite pronounced differences between recording methods, these diaries may provide valid and useful reports of crying and fussing in the short term.
TL;DR: PE/DOTAP vesicles show substantial lipid mixing with negatively charged vesicle containing high proportions of phosphatidylcholine, as well as with human erythrocyte ghosts, on a time scale of a few minutes.
Abstract: Lipid vesicles with a positive surface charge have been prepared by using mixtures of phosphatidylethanolamine (PE) and phosphatidylcholine (PC) together with low mole fractions of a cationic lipid analogue, 1,2-bis(oleoyloxy)-3-(trimethylammonio)propane (DOTAP). We have used measurements of vesicle aggregation, lipid mixing, contents mixing, and contents leakage to examine the interactions between these vesicles and similar vesicles that carry a negative surface charge. Mixtures of vesicles with opposite surface charges aggregate readily at physiological or lower ionic strengths, and the extent of this aggregation is enhanced for vesicles that contain high proportions of PE relative to PC. Mixing of lipids and aqueous contents can also be observed between such vesicles, particularly when the vesicles contain substantial proportions of PE. Surprisingly, these latter processes are strongly promoted by monovalent salts and do not proceed at very low ionic strengths. PE/DOTAP vesicles show substantial lipid mixing with negatively charged vesicles containing high proportions of phosphatidylcholine, as well as with human erythrocyte ghosts, on a time scale of a few minutes. These interactions are strongly promoted both by the presence of high levels of PE in the cationic vesicles and by the presence of complementary surface charges on the two membrane populations.
TL;DR: It is suggested that cholinergic pontomesencephalic neurons may be critically involved in the generation of paradoxical sleep and its phasic events.
TL;DR: In this paper, a series of LISREL analyses showed that aspects of the strategy-making process and the content of business strategies mediate between organizational context and structure, and that one dimension of context is the context of context.
Abstract: A series of LISREL analyses showed that aspects of the strategy-making process and the content of business strategies mediate between organizational context and structure. One dimension of context,...
TL;DR: Findings reveal an apparently selective alteration in the densities of putative nicotinic and muscarinic M2, but not M1, receptor sites in cortical areas and in the hippocampus in Alzheimer's disease.
Abstract: The main objective of the present study was to determine whether cholinergic markers (choline acetyltransferase activity and nicotinic and muscarinic receptors) are altered in Alzheimer's disease. Choline acetyltransferase activity in Alzheimer's brains was markedly reduced in various cortical areas, in the hippocampus, and in the nucleus basalis of Meynert. The maximal density of nicotinic sites, measured using the novel nicotinic radioligand N-[3H]methylcarbamylcholine, was decreased in cortical areas and hippocampus but not in subcortical regions. M1 muscarinic cholinergic receptor sites were assessed using [3H]pirenzepine as a selective ligand; [3H]pirenzepine binding parameters were not altered in most cortical and subcortical structures, although the density of sites was modestly increased in the hippocampus and striatum. Finally, M2-like muscarinic sites were studied using [3H]-acetylcholine, under muscarinic conditions. In contrast to M1 muscarinic sites, the maximal density of M2-like muscarinic sites was markedly reduced in all cortical areas and hippocampus but was not altered in subcortical structures. These findings reveal an apparently selective alteration in the densities of putative nicotinic and muscarinic M2, but not M1, receptor sites in cortical areas and in the hippocampus in Alzheimer's disease.
TL;DR: The binormal form is the most common model used to formally fit ROC curves to the data from signal detection studies that employ the "rating" method, but the small lack of fit is unlikely to be demonstrated in practice, and the small number of rating categories used does not permit seemingly very different models to be distinguished from one another.
Abstract: The binormal form is the most common model used to formally fit ROC curves to the data from signal detection studies that employ the "rating" method. The author lists a number of justifications that have been offered for this choice, ranging from theoretical considerations of probability laws and signal detection theory, to mathematical tractability and convenience, to empirical results showing that "it fits!" To these justifications is added another, namely that even if an alternative formulation based on another underlying form (e.g., power law) or model (e.g., binomial, Poisson, or gamma type distributions) were in fact correct, the binormal fit differs so little from the true form as to be of no practical consequence. Moreover, the small lack of fit is unlikely to be demonstrated in practice: it is obscured by the much larger variation that can be attributed to sampling of cases. In addition, even if a very large sample of cases could be studied, the small number of rating categories used does not per...
TL;DR: In this paper, the inner hysteresis current feedback loop was replaced by the standard sinusoidal PWM control and in the process saving the cost of the current measuring transducers.
Abstract: The indirect current control scheme has evolved from the success of the hysteresis current controlled voltage regulated rectifier, which has been shown to be capable of: unity and even leading power factor operation; near sinusoidal current waveforms; and bilateral power transfer without the need of bi-directional solid state power switches. The advance consists of replacing the inner hysteresis current feedback loop by the standard sinusoidal PWM control and in the process saving the cost of the current measuring transducers. The scheme is evaluated through tests on 1 KW size laboratory models and through digital simulations. A theory of the system dynamics is developed and stability boundaries are presented. >