Showing papers by "Université de Montréal published in 1991"
01 Feb 1991
TL;DR: Initial results from an apparatus and protocol designed to implement quantum public key distribution are described, by which two users exchange a random quantum transmission, consisting of very faint flashes of polarized light, which remains secure against an adversary with unlimited computing power.
Abstract: We describe initial results from an apparatus and protocol designed to implement quantum public key distribution, by which two users, who share no secret information initially: 1) exchange a random quantum transmission, consisting of very faint flashes of polarized light; 2) by subsequent public discussion of the sent and received versions of this transmission estimate the extent of eavesdropping that might have taken place on it, and finally 3) if this estimate is small enough, can distill from the sent and received versions a smaller body of shared random information (key), which is certifiably secret in the sense that any third party's expected information on it is an exponentially small fraction of one bit. Because the system depends on the uncertainty principle of quantum physics, instead of usual mathematical assumptions such as the difficulty of factoring, it remains secure against an adversary with unlimited computing power.
1,390 citations
Journal Article•
TL;DR: The purpose of this paper is to point out some limits and inconsistencies in the table of nonprotein respiratory quotient that is universally used, developed by Lusk in 1924, which was derived from biochemical and physical data that are now outdated.
Abstract: The purpose of this paper is to point out some limits and inconsistencies in the table of nonprotein respiratory quotient that is universally used. This table, developed by Lusk in 1924, was derived from biochemical and physical data that are now outdated. A new table of nonprotein respiratory quotient, consistent with modern chemical and physical data, is proposed. The revised table is based on (a) the average composition of human triacylglycerol stores, (b) energy potential of fatty acids and glucose, and (c) the volumes occupied by one mole of oxygen or carbon dioxide (which are not ideal gases) under STPD conditions.
1,063 citations
TL;DR: It is suggested that the "dysfunction" that is characteristic of several types of chronic musculoskeletal pain is a normal protective adaptation and is not a cause of pain.
Abstract: Articles describing motor function in five chronic musculoskeletal pain conditions (temporomandibular disorders, muscle tension headache, fibromyalgia, chronic lower back pain, and postexercise mus...
986 citations
TL;DR: It has now been demonstrated that painful heat causes significant activation of the contralateral anterior cingulate, secondary somatosensory, and primary somatoensory cortices.
Abstract: The representation of pain in the cerebral cortex is less well understood than that of any other sensory system. However, with the use of magnetic resonance imaging and positron emission tomography in humans, it has now been demonstrated that painful heat causes significant activation of the contralateral anterior cingulate, secondary somatosensory, and primary somatosensory cortices. This contrasts with the predominant activation of primary somatosensory cortex caused by vibrotactile stimuli in similar experiments. Furthermore, the unilateral cingulate activation indicates that this forebrain area, thought to regulate emotions, contains an unexpectedly specific representation of pain.
964 citations
TL;DR: In this article, the authors tested Brown and Holmes' (1986) three-factor safety climate model on construction workers and found that a two-factor model provided an overall better fit.
645 citations
TL;DR: It is suggested that the production of the rhythm, and of the opener and closer motoneuron bursts, are independent processes that are carried out by different groups of cells.
Abstract: This review describes the patterns of mandibular movements that make up the whole sequence from ingestion to swallowing food, including the basic types of cycles and their phases. The roles of epithelial, periodontal, articular, and muscular receptors in the control of the movements are discussed. This is followed by a summary of our knowledge of the brain stem neurons that generate the basic pattern of mastication. It is suggested that the production of the rhythm, and of the opener and closer motoneuron bursts, are independent processes that are carried out by different groups of cells. After commenting on the relevent properties of the trigeminal and hypoglossal motoneurons, and of internuerons on the cortico-bulbar and reflex pathways, the way in which the pattern generating neurons modify sensory feedback is discussed.
561 citations
01 Oct 1991
TL;DR: In this article, two complementary delineation criteria are presented which provide guidelines to the design of relatively short, low-loss tapered fibres and devices, which are used to explain anomalous loss effects in depressed-cladding and W-fibres, as well as the difficulty in fabricating low loss devices by tapering such fibres.
Abstract: Two complementary delineation criteria are presented which provide guidelines to the design of relatively short, low-loss tapered fibres and devices. They are used to explain anomalous loss effects in depressed-cladding and W-fibres, as well as the difficulty in fabricating low-loss devices by tapering such fibres. Practical application of the criteria to couplers, beam expanders and abrupt taper filters is summarised. The accompanying paper provides both experimental and theoretical justification for the delineation criteria.
447 citations
TL;DR: Results indicate that the aggression scales which include only a few physical aggression items and many disruptive items probably aggregate two kinds of disruptive boys, the highfrequency fighters at high risk for stable disruptive, physically aggressive, and antisocial behaviors, and the disruptive low-frequency fighters who are at a lower risk of stable disruptive behavior and at a higher risk of early antisocial behavior.
Abstract: Boys' fighting was assessed at ages six, eight, and nine. The boys (N=69) had been selected from the 30% most disruptive children in kindergartens from low socioeconomic neighborhoods. Twentythree percent of these disruptive boys were rated as high fighters on three assessments (“stable high fighters”), and 28% were rated as high fighters on two of the three assessments (“variable high fighters”). Forty-two percent were rated as high fighters only one out of three assessments (“occasional high fighters”) and 7% were never rated as high fighters. Only high fighting in two successive years significantly increased the risk of being rated a high fighter in a following year. At age 10, stable high fighters (high fighters at ages 6, 8, 9) were perceived by teachers, peers, mothers, and the boys themselves as more disruptive and more antisocial than occasional high fighters. These results show an impressive self-other agreement in boys who have adopted a physically aggressive life style from an early age. The three groups did not differ on individual family demographic characteristics, but stable high fighters had a higher mean on an index of family socioeconomic disadvantage. Results indicate that the aggression scales which include only a few physical aggression items and many disruptive items (oppositional behavior, rejection, hyper activity, inattention, etc.) probably aggregate two kinds of disruptive boys, the highfrequency fighters at high risk for stable disruptive, physically aggressive, and antisocial behaviors, and the disruptive low-frequency fighters who are at a lower risk of stable disruptive behavior and at a lower risk of early antisocial behavior.
447 citations
TL;DR: This article examined the influence of self-efficacy on actual self-regulation during a verbal concept formation task of students, already known to be of average or above average cognitive ability, at two grade levels.
Abstract: The aim of the present study was to examine the influence of self-efficacy on actual self-regulation during a verbal concept formation task of students, already known to be of average or above average cognitive ability, at two grade levels. Following the assessment of self-efficacy, students were observed while they attempted to solve four problems of varying difficulty. The major findings were that irrespective of differences in school grade and in cognitive ability, self-efficacy exerted significant influence on various aspects of self-regulation, such as monitoring of working time, task persistence, and rejection of correct hypotheses, as well as on performance. These results provided support for the construct validity of self-efficacy as different from cognitive competence.
420 citations
TL;DR: Reductions in general intellectual measures, as well as in executive and psychomotor tasks were all attributable to the severity of hypoxemia, while other attention and memory deficits were related to vigiance impairment.
Abstract: Neuropsychological deficits have been documented in patients with obstructive sleep apnea syndrome (OSSA). Both nocturnal hypoxemia and impairment of daytime vigilance have been suggested as the pathogenesis of these deficits, yet it remains difficult to find good correlations between cognitive deficits and either of these physiological parameters. In the present study, 10 normal controls were compared to 10 moderately and 10 severely apneic patients, all recorded in a sleep laboratory for two consecutive nights, with a vigilance and neuropsychological assessment made during the intervening day. Relative to the controls, moderate and severe OSAS showed differences in many cognitive functions, although the severely affected showed the greater differences. Moreover, severe apneics were also worse than moderate apneics on tests that were found to be normal in the latter group. This suggests a discontinuity in the appearance of neuropsychological deficits as OSAS progresses. Further analyses revealed...
369 citations
TL;DR: The present results demonstrate that (1) the noradrenergic system is probably the most important system for the initiation of locomotion; (2) the effect of monoaminergic drugs are reproducible when given in similar time periods in different chronic spinal cats and (3) the three Monoaminergic descending systems can modify rather specifically different aspects of the well established locomotor pattern in the same chronic spinal cat.
TL;DR: In this article, the time-dependent decay rates of the three processes B d 0 → D 0 K s, D 0 k s, and D 1 0 K S, where D10 is a neutral D meson CP-eigenstate, were derived from the unitarity triangle of the Cabibbo-Kobayashi-Maskawa matrix.
TL;DR: Overall, 82% of patients had a bronchogenic cyst that was either symptomatic or complicated or both and despite extensive investigations, a positive diagnosis was never made preoperatively even if it was suspected in 57% of Patients.
TL;DR: In this paper, a method for the selection of appropriate test case, an important issue for conformance testing of protocol implementations as well as software engineering, is presented, called the partial W-method, which is shown to have general applicability, full fault-detection power, and yields shorter test suites than the W-Method.
Abstract: A method for the selection of appropriate test case, an important issue for conformance testing of protocol implementations as well as software engineering, is presented. Called the partial W-method, it is shown to have general applicability, full fault-detection power, and yields shorter test suites than the W-method. Various other issues that have an impact on the selection of a suitable test suite including the consideration of interaction parameters, various test architectures for protocol testing and the fact that many specifications do not satisfy the assumptions made by most test selection methods (such as complete definition, a correctly implemented reset function, a limited number of states in the implementation, and determinism), are discussed. >
TL;DR: In this article, the authors evaluated gender differences in psychosocial responses of 449 consecutive first-admission couples in a fertility clinic and found that infertile women showed higher distress than their partners on a global measure of psychiatric symptoms and subscales of anxiety, depression, hostility, and cognitive disturbances, as well as on measures of stress and self-esteem.
TL;DR: The epidemiological literature has been ambiguous concerning reliability estimates for continuous variables, but based on demonstrations available in the literature this paper recalls that both estimates are equivalent and highlights the conditions under which they are equivalent.
TL;DR: No evidence is found to suggest that phasic stretch reflexes contributed significantly to the joint stiffness in this task, and clear differences in flexor muscle synergy were observed in the presence and absence of cocontraction, particularly when comparing the FCR and FCU muscles.
Abstract: The objectives of this study were to examine the effects of load mechanical characteristics and agonist-antagonist muscle cocontraction, on the stretch reflex response of wrist flexor muscles, and to measure the associated wrist stiffness. Subjects were required to maintain a constant wrist angle while operating against flexor loads with different stability characteristics (constant, elastic or unstable). We measured the stretch reflex responses and joint stiffness by applying step displacements of 3° and 10°. Subjects used very little cocontraction of wrist flexor and extensor muscles when the load was constant or elastic, but increased cocontraction dramatically when the load was unstable, in order to increase the wrist stiffness. Although the magnitude of stretch reflex responses also increased with cocontraction, this simply reflected the level of tonic flexor muscle activity. We found no evidence to suggest that phasic stretch reflexes contributed significantly to the joint stiffness in this task. Clear differences in flexor muscle synergy were observed in the presence and absence of cocontraction, particularly when comparing the FCR and FCU muscles.
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TL;DR: In the absence of sunk costs, a low quality producer benefits from a mildly restrictive quality standard whereas a high quality producer suffers from it as discussed by the authors, and consumers' welfare increases if the firm producing the higher quality does not increase its quality significantly in response to the increase in quality by its rival.
Abstract: In the absence of sunk costs, a low-quality producer benefits from a mildly restrictive quality standard whereas a high-quality producer suffers from it. Consumers' welfare increases if the firm producing the higher quality does not increase its quality significantly in response to the increase in quality by its rival. A sufficiently severe standard causes exit from the industry. When there are no sunk cost, the high-quality producer exits first.
TL;DR: The results show that chronic alveolar hypoventilation is likely to develop in COPD patients who have a combination of high inspiratory loads and inspiratory muscle weakness, and hypercapnia may be one strategy available to avoid overloading of the inspiratory muscles leading to fatigue and possible irreversible failure.
Abstract: A prospective evaluation of the prevalence of CO2 retention and its relationship to lung mechanics and inspiratory muscle strength was carried out in 311 clinically stable patients with chronic obstructive pulmonary disease (COPD). Of these patients 32.8% had hypercapnia (PaCO2 greater than or equal to 43 mm Hg). PaCO2 was directly related to lung resistance (RL; r = 0.53) and inversely related to FEV1 (r = 0.53) and to an expression of the dead space/tidal volume ratio (1 - VD/VT) (r = 0.48). RL was found to be a major determinant of the mean intrathoracic pressure swing developed during inspiration (PI) at rest (r = 0.85). Maximal inspiratory pressure (PImax) was found to improve the predictive value for PaCO2 of several mechanical loads, with RL/PImax the best predictor (r = 0.57). The prevalence of hypercapnia increased from virtually 0 to 100% with increases in the RL/PImax value and was higher in the obese subjects at intermediate RL/PImax values, probably because of the burden placed on the respiratory muscles by chest wall mass loading. Our results show that chronic alveolar hypoventilation is likely to develop in COPD patients who have a combination of high inspiratory loads and inspiratory muscle weakness. hypercapnia may be one strategy available to avoid overloading of the inspiratory muscles leading to fatigue and possible irreversible failure.
TL;DR: The results suggest that the PEEP-induced increase in arterial oxygenation is significantly correlated to the recruited volume but not to the changes in static compliance, and the shape of the static inflation V-P curves on ZEEP allows the prediction of alveolar recruitment with PEEP.
Abstract: The effects of different levels of positive end-expiratory pressure (PEEP) (zero to 15 cm H2O) on the static inflation volume-pressure (V-P) curve of the respiratory system and on gas exchange were studied in eight patients with the adult respiratory distress syndrome (ARDS). Alveolar recruitment with PEEP was quantified in terms of recruited volume, i.e., as difference in lung volume between PEEP and zero end-expiratory pressure (ZEEP) for the same static inflation pressure (20 cm H2O) from the V-P curves obtained at the different PEEP levels. In addition, static compliance of the respiratory system at fixed tidal volume (0.7 L) was determined at the different PEEP levels. The results suggest that: (1) in some patients with ARDS the V-P curves determined on ZEEP exhibit an upward concavity reflecting progressive alveolar recruitment with increasing inflation volume, and PEEP results in alveolar recruitment (range of recruited volume at 15 cm H2O of PEEP: 0.11 to 0.36 L); (2) in other patients with ARDS the V-P curves on ZEEP are characterized by an upward convexity, and PEEP results in a volume displacement along this curve without alveolar recruitment and with enhanced risk of barotrauma; (3) the PEEP-induced increase in arterial oxygenation is significantly correlated to the recruited volume but not to the changes in static compliance. The shape of the static inflation V-P curves on ZEEP allows the prediction of alveolar recruitment with PEEP.
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TL;DR: In this paper, the authors study the connections between product market conditions and negotiated wage settlements and union employment in the presence of foreign competition shocks in a small open economy such as Canada and exploit the fact that the price of imports and exports should represent pure demand shocks.
Abstract: In this paper we study the connections between product .market conditions. negotiated wage settlements. and union employment in the presence of foreign competition shocks. We exploit the fact that in a small open economy such as Canada the price of imports and exports should represent pure demand shocks. We specify wage and employment determination equations for a sample of collective bargaining agreements from 1965 to 1983. Our estimation strategy consists of specifying the wage as a function of firm-specific value added per worker instrumented with the price of imports and the price of exports in the industry. The OLS specification is rejected in favor of the instrumental variables specification using standard specification tests. The instrumental variables estimates imply that a 1% change in value-added per worker increases the negotiated wage settlements by 0.25%. Similarly, we specify union employment as a function of firm-specific sales instrumented by the price of imports and exports in the industry. The instrumental variables estimates are imprecise and the specification test fails to reject the OLS specification. The OLS estimates imply that a 1% change in firm-specific sales increases employment by 0.19%. We use our estimates to trace the effects of foreign competition on the industry and firm-level sales and value-added measures.
TL;DR: It was found that females rated noxious heat stimuli as more intense than did males, independent of the gender of the experimenter or the type of rating scale, which indicates that the sex‐related variation in pain perception is probably related to sensory factors rather than differences in attitude or emotional response.
Abstract: This study compared pain perception in young male and female subjects, using experimental noxious heat stimuli. During 2 sessions, each of 40 subjects rated the magnitude of 120 heat stimuli, ranging from 45 degrees C to 50 degrees C. The study included a comparison of visual analogue and magnitude matching rating procedures, as well as a test of simulated analgesia, in which the range of stimuli presented during the 2 experimental sessions was shifted by 1 degree C. We found that females rated noxious heat stimuli as more intense than did males, independent of the gender of the experimenter or the type of rating scale. In addition, the data suggest that females discriminate among the painful heat intensities better than males. For example, female subjects showed significant between-session discrimination of noxious heat stimuli, while male subjects did not, and females produced steeper within-session stimulus-response functions than did males. These observed differences in nociceptive discrimination between males and females indicate that the sex-related variation in pain perception is probably related to sensory factors rather than differences in attitude or emotional response.
TL;DR: The purpose of this paper is to outline basic approaches and basic types of algorithms available to deal with this problem and to review their convergence analysis.
Abstract: A generalized fractional programming problem is specified as a nonlinear program where a nonlinear function defined as the maximum over several ratios of functions is to be minimized on a feasible domain of źn. The purpose of this paper is to outline basic approaches and basic types of algorithms available to deal with this problem and to review their convergence analysis. The conclusion includes results and comments on the numerical efficiency of these algorithms.
TL;DR: In a substantial number of VTs, a substrate localization that is at variance with the conventional concept can be detected by simultaneous epicardial and endocardia mapping and may require modification of the surgical approach conventionally aimed at endocardial layers.
Abstract: BACKGROUND Left ventricular endocardial reentry is the conventional concept underlying surgery for ventricular tachycardia (VT). We assessed the incidences of patterns showing complete reentry circuits at either the subendocardial or subepicardial level and of patterns in which left ventricular endocardial mapping could only in part account for a reentrant mechanism.
METHODS AND RESULTS We retrospectively analyzed epicardial and left ventricular endocardial isochronal maps of 47 VTs induced in 28 patients with chronic myocardial infarction (inferior, 14 patients; anteroseptal, 14 patients). Electrograms were recorded intraoperatively from 128 sites with epicardial sock and transatrial left ventricular endocardial balloon electrode arrays. Given the methodology used in this study, the mapping characteristics of the tachycardias suggested five types of activation patterns: 1) complete (90% or more of VT cycle length) subendocardial reentry circuits in seven VTs (15%) and seven patients (25%), 2) complete subepicardial reentry circuits in four VTs (9%) and four patients (14%), 3) incompletely mapped circuits with a left ventricular endocardial breakthrough preceding the epicardial breakthrough in 25 VTs (53%) and 21 patients (75%), 4) incompletely mapped circuits with a left ventricular epicardial breakthrough preceding the endocardial breakthrough in three VTs (6%) and three patients (11%), and 5) a right ventricular epicardial breakthrough preceding the left ventricular endocardial breakthrough in eight VTs (17%) and seven patients (25%). After surgery, one type 3 VT and three type 5 VTs were reinducible. Thus, left ventricular endocardial reentry substrates (types 1 and 3) accounted for 68% of VTs, but substrates involving subepicardial (types 2 and 4) and deep septal layers (type 5) accounted for 32% of VTs.
CONCLUSIONS In a substantial number of VTs, a substrate localization that is at variance with the conventional concept can be detected by simultaneous epicardial and endocardial mapping and may require modification of the surgical approach conventionally aimed at endocardial layers.
TL;DR: In this study, 10 nondisabled male subjects walked on a treadmill while 0%, 30%, 50%, and 70% of their body weight was supported by a modified climbing harness and adaptations to BWS were a reduction in the mean burst amplitude of the muscles that are active during stance and an increase in the means burst amplitudes of the tibialis anterior muscle.
Abstract: The recovery of locomotion, following interactive training with graded weight support, in the adult spinal cat has led to the proposal that removal of body weight may be a therapeutic tool in human gait retraining. There would be benefits, however, in knowing normal responses of humans to partial weight bearing before applying this strategy to patients. In this study, 10 nondisabled male subjects walked on a treadmill while 0%, 30%, 50%, and 70% of their body weight was supported by a modified climbing harness. To dissociate the changes attributable to walking speed from those attributable to body weight, each subject walked at the specified body-weight-support (BWS) levels and at full weight bearing (FWB) at the same speed. Simultaneously, electromyographic data from the right leg muscles, footswitch signals, and video recording of joint motion were collected. The FWB and BWS gaits appeared similar, except at the highest level of BWS studied (ie, 70% of BWS). Significant differences among other BWS and FWB trials at comparable speeds included decreases in percentage of stance, percentage of total double-limb support time, and maximum hip and knee flexor swing angle. Other adaptations to BWS were a reduction in the mean burst amplitude of the muscles that are active during stance and an increase in the mean burst amplitude of the tibialis anterior muscle. The possible implications of this new gait retraining strategy for patients with neurological impairment are discussed. [Finch L, Barbeau H, Arsenault B. Influence of body weight support on normal human gait: development of a gait retraining strategy.
11 Aug 1991
TL;DR: A protocol for quantum oblivious transfer, utilizing faint pulses of polarized light, by which one of two mutually distrustful parties transmits two one-bit messages in such a way that the other party can choose which message he gets but cannot obtain information about both messages.
Abstract: We describe a protocol for quantum oblivious transfer, utilizing faint pulses of polarized light, by which one of two mutually distrustful parties ("Alice") transmits two one-bit messages in such a way that the other party ("Bob") can choose which message he gets but cannot obtain information about both messages (he will learn his chosen bit's value with exponentially small error probability and may gain at most exponentially little information about the value of the other bit), and Alice will be entirely ignorant of which bit he received. Neither party can cheat (ie deviate from the protocol while appearing to follow it) in such a way as to obtain more information than what is given by the description of the protocol. Our protocol is easy to modify in order to implement the All-or-Nothing Disclosure of one out of two string messages, and it can be used to implement bit commitment and oblivious circuit evaluation without complexity-theoretic assumptions, in a way that remains secure even against cheaters that have unlimited computing power. Moreover, this protocol is practical in that it can be realized with available opto-electronic apparatus while being immune to any technologically feasible attack for the foreseeable future.
TL;DR: Data indicate that trans‐sphenoidal microsurgery is an effective and safe initial treatment for patients with nonsecreting pituitary adenoma and may reverse hypopituitarism.
Abstract: From 1962 to 1987, 126 patients underwent trans-sphenoidal surgery for primary treatment of pituitary adenomas unassociated with clinical or biochemical evidence of hormonal overproduction. There were 73 male and 53 female patients (mean age, 50 +/- 12 years). Before surgery, 56% of the patients (70 of 124) had headaches, 74% (94 of 126) had deterioration of vision, and 12% (15 of 126) had ophthalmoplegia. Endocrine evaluation revealed the presence of hypogonadism in 75% (87 of 115), adrenal insufficiency in 36% (46 of 126), and hypothyroidism in 18% (21 of 122). Plasma prolactin was increased in 65% (56 of 86) with a mean level of 39 +/- 14 micrograms/l (normal, 3 to 20 micrograms/l). Radiologic enlargement of the sella turcica was documented in all cases: 67% (84 of 126) had enclosed and 33% (42 of 126) had invasive adenomas. After surgery, vision was normalized or improved in 75% (71 of 94) of the patients. Thyroid, adrenal, and gonadal functions were improved in 14% (three of 22), 41% (19 of 46), 11% (ten of 87), were unchanged in 82% (100 of 122), 77% (97 of 126), 89% (102 of 115), and worsened in 15% (19 of 22), 8% (ten of 126), 3% (102 of 115), respectively. Permanent diabetes insipidus occurred in 5% (seven of 126). Two patients died during the immediate postoperative period. The recurrence rate in patients with a mean follow-up of 6.4 +/- 4.2 years was 21% (15 of 71). These data indicate that trans-sphenoidal microsurgery is an effective and safe initial treatment for patients with nonsecreting pituitary adenoma and may reverse hypopituitarism.
TL;DR: It is found that three distinctly different fictive motor patterns can be generated in chronic spinal cats depending on the method and site of stimulation, which indicates that DOPA and Clonidine do not have strictly identical actions on the locomotor pattern generator.
Abstract: 1. Fictive motor patterns were recorded in hind leg nerves of 10 adult chronic spinal cats (spinalized at T13). Four of these animals had been trained to step with their hind legs on a treadmill (l...
Alfred P. Sloan Foundation1, University of Texas at Austin2, University of Arkansas at Little Rock3, Ames Research Center4, University of Colorado Boulder5, Université de Montréal6, Australian National University7, Indian Space Research Organisation8, University of Cape Town9, University of Toulouse10, PSL Research University11, University of Leicester12, Universidade Federal do Rio Grande do Sul13, Tennessee State University14, Iowa State University15
TL;DR: In this article, the power spectrum of a pulsating prewhite dwarf star (DPV) PG 1159 - 035 was resolved into 125 individual frequencies; 101 of them were identified with specific quantized pulsation modes, and the rest were completely consistent with such modal assignment.
Abstract: Results are reported from 264.1 hr of nearly continuous time-series photometry on the pulsating prewhite dwarf star (DPV) PG 1159 - 035. The power spectrum of the data set is completely resolved into 125 individual frequencies; 101 of them are identified with specific quantized pulsation modes, and the rest are completely consistent with such modal assignment. It is argued that the luminosity variations are certainly the result of g-mode pulsations. Although the amplitudes of some of the peaks exhibit significant variations on the time scales of a year or so, the underlying frequency structure of the pulsations is stable over much longer intervals. The existing linear theory is invoked to determine, or strongly constrain, many of the fundamental physical parameters describing this star. Its mass is found to be 0.586 solar mass, is rotation period 1.38 days, its magnetic field less than 6000 G, its pulsation and rotation axes to be aligned, and its outer layers to be compositionally stratified.
TL;DR: In this paper, a relapse prevention module was added to a two-week training program in order to evaluate its impact on post-training transfer, and the results indicated that knowledge acquisition and the extent of strategy utilization was significantly higher for those who participated in the RP intervention.
Abstract: A relapse prevention (RP) module was added to a two-week training programme in order to evaluate its impact on post-training transfer. Locus of control, as well as the subjects' self-perceptions of the degree to which the work milieu would support their application of the skills taught, were also measured. The outcome (dependent) variables, measured for the 81 training participants, included reactions, knowledge and on-the-job skill usage, with the latter being obtained from both the trainees and their immediate supervisors. The results indicate that, as compared to appropriate controls, knowledge acquisition and the extent of strategy utilization was significantly higher for those who participated in the RP. Locus of control and perceived support interacted with the RP intervention on the extent of strategy utilization. The results are discussed in the light of previous research on the issue of transfer of training.