Étude de la valorisation de la magnétite titanifère de la région de Magpie,Québec: Partie II — Composition et structure de la fonte et de la scorie obtenues par fusion réductrice d'un concentré magnétique

Abstract

A magnetic concentrate from Magpie titaniferous iron ore has been smelted in a pilot scale arc furnace. A pig iron containing most of the chromium and vanadium of the ore has been obtained, while the titanium remained in the slag. The main phases occurring in this slag are a pseudobrookite-type solid solution, a spinel and several silicates. The composition of pseudobrookite depends on the reducing conditions and can reach 90% TiO₂. The spinel composition is on the MgAl₂O₄ side of the MgAl₂O₄-Mg₂TiO₄ solid solution.

Résumé

Des essais de fusion réductrice au four électrique en présence de carbone, ont été réalisés sur un concentré magnétique du minerai de Magpie. Ce traitement permet d'obtenir une fonte contenant la plus grande partie du chrome et du vanadium, et une scorie titanifere. Cette dernière est constituée d'une pseudobrookite, d'un spinelle et de silicates. La pseudobrookite est une solution solide de composition variable suivant le degré de réduction et titrant plus de 90% en TiO₂. Le spinelle est de composition voisine de MgAl₂O₄.     

Modes de déformation de monocristaux h.c. de dysprosium et d'erbium

Dysprosium and erbium single crystals were deformed by compression between 0.17 and 0.5 T_f. The primary slip system is {101̄0} <112̄0 >; basal slip (0001) <112̄0 > and twinning on (112̄1) plane are secondary deformation modes. The problem of the relative ease of slip system in h.c.p. metals is discussed; assumption of a relation between deformation modes and electronic structure is expressed.     

L'édition spéciale de la neurologie cognitive: Préface.

Discusses this special edition in cognitive neuroscience in the Canadian Journal of Experimental Psychology (CJEP). The editors decided to focus their efforts on three "hot" research areas in Cognitive Neuroscience--perception and action, multisensory integration, memory and higher-order cognition--and within each domain highlighting how different research methodologies can be brought to bear on the issue of the neural bases of higher mental functions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Application du chauffage par concentration de rayonnement (four à image) à l'élaboration de matériaux réfractaires nouveaux

Abstract

An image furnace has been applied to floating zone experiments on refractory oxides.

(1) High purity alumina has been obtained by the zone melting process. The distribution of impurities during the different stages of the process has been studied by activation analysis.

(2) Large single crystals of refractory oxides (MnO, FeO, CoO, NiO, Al₂O₃, Ga₂O₃, TiO₂, ruby, spinel) have been grown and characterized. (3) Bicristals of the same materials have also been grown in order to study the grain boundary properties.

(4) Oxide eutectics have been grown by unidirectional solidification in the systems Al₂O₃-TiO₂, Al₂O₂-ZrO₂, NiO-CaO and NiO-Al₂O₂

These very diverse materials obtained by the same technique make possible a broad study of the influence on ultra pure single crystals, of defects (impurities, grain boundary, second phase).

Résumé

Un four à image a été appliqué à la réalisation d'expériences de zone flottante effectuées sur des matériaux réfractaires.

(1) Des expériences de purification D'oxydes par la méthode de la zone fondue ont permis l'elaboration de barreaux d'alumine de très grande pureté. La ségrégation des impuretés au cours de passages de zone successifs a été etudiée par analyse par activation.

(2) Des monocristaux de grandes dimensions d'oxydes réfractaires simples ou mixtes (MnO, FeO, CoO, NiO, Al₂O₃, Ga₂O₃, TiO₂, rubis, spinelle) ont été élavorés.

(3) Des bicristaux des mêmes matériaux ont également été préparés en vue d' étudier les propriétés du joint de grains.

(4) Des matériaux composites réfractaires

ont été élaborés par solidification dirigée de mélanges d'oxydes de compo s ition eutectique (Al₂O₃-TiO₂; Al₂O₂-ZrO₂; NiO-CaO ; NiO-Al₂O₂).

Ces rnatériaux tres divèrs, obtenus par une même methode permettent d' étudier, à partir de monocristaux ultra-purs, l'influence sur les propriétés de la présence d'impuretés, de joints de grains, ou d'autres phases.     

étude comparative de nourrissons prématurés et nés à terme et des modes de stimulations qu'ils expérimentent au cours des six premiers mois.

Compared preterm and fullterm infants' temperament and development and to evaluate the physical and social stimulations they experience at 2, 4 and 6 months (correcting for prematurity). Fifty-six mother–infant dyads, including 28 premature and 28 fullterm infants, participated in the study. The groups did not differ on temperament and developmental measures, neither on physical environment (density, toys, accessories). However, significant differences were found regarding social stimulation. Mothers of preterm infants had less optimal sensibility-contingency scores and used more distal stimulation at 2 months than mothers of fullterm infants. During the first 6 months, premature infants spent more time in activities involving the immediate family, whereas fullterm infants went more frequently on outings. At home, fullterm infants interacted more with people from their social network. These stimulations could eventually have an impact on infant development. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

élaboration et validation d'un instrument de mesure de la conscience phonologique.

This study describes the steps in developing and validating a French-language instrument to measure phonological awareness. The selected task involves ranking from a list of 4 words presented orally. Ss must choose the word that begins differently than the others. To decrease the mnestic difficulty of the test, illustrations accompany the words. Two pre-experiments using a bank of 20 items led to preparation of a final version of the phonological awareness test, which consists of 10 items. The validity and reliability of this version were assessed using 57 pre-schoolers and 60 kindergartners. In terms of validity and reliability, the psychometric features of the test were deemed satisfactory for the kindergarten students but deficient for the pre-schoolers. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Résistance au frottement sévère de composites métalliques à particules

This study considers the severe wear of silicon-carbide reinforced composite materials. The volume fraction of particles has been varied. The wear mechanisms and behaviour of this material have been obtained by varying the following test parameters : rubbing speed. applied load and volume fraction of particles. These tests have demonstrated the existence of two wear thresholds, which mark a change in the mechanism of degradation. Finally, it has been shown that the particles protect the composite while the temperature rise produced by the wear does not affect the mechanical properties of the matrix.     

Raretés et inconsistances au TMDP (Test multidimensionnel de personnalité).

Notes that the assessment of psychopathology should address the issue of "test taking attitude". The author states that protocols made at random, faked good or bad, should be identified and no interpretation of clinical scales should be provided for invalid protocols. Three concepts were used in the assessment of scale validity. An incongruency scale for the yes-sayers was designed to evaluate the agreement between responses of a specific yes-sayer and those of yes-sayers in general. An infrequency scale was composed of items rarely endorsed by patients and normals. Finally, an inconsistency scale was derived from pairs of items highly correlated and usually answered in a similar or opposite way. Concomitant validity of the 3 scales was established by mean of correlations with similar MMPI-2 scales. By excluding yes-sayers with incongruent responses and protocols with many infrequent or inconsistent responses, it is concluded that the assessment of psychopathology can be more accurate and the clinical scales more specific. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

L'appariement des styles de motivation et l'évolution de la satisfaction conjugale.

Examined whether couples tend to adopt self-determined motivational styles and observed the relationship between couples, motivation style pairings and marital satisfaction. The sample consisted of 226 married or cohabiting couples participating on a voluntary basis. 87 couples completed the questionnaires a 2nd time 36 mo later. The instruments used were the Couple Motivation Questionnaire and the Dyadic Adjustment Scale. Results showed that there is a significant relationship between women's and men's motivations to live together. The most frequent couples' pattern of pairing was 2 people with self-determined motivational styles. Furthermore, this couple pattern was related to higher marital satisfaction. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Vers une compréhension de la dépression dans la perspective des femmes: Exploration de la contribution des approches de la recherche qualitative.

Provides an introduction to the special issue of Canadian Psychology on depression in women. "Depression" is recognized as one of the more common mental health problems and also one that is particularly prevalent among women. One major limitation of mainstream theorizing is the taken-for-granted view of depression as a form of internal "psychopathology," a phenomenon which can be understood without regard to sociocultural context. An approach that avoids this limitation is one in which contextual aspects of women's lives are included from the outset by following a research process that begins with the lived experiences of women. A focus on women's experiences also leads to consideration of the contributions of qualitative approaches to research on depression which are compatible with both a feminist standpoint perspective and social constructionist epistemologies. The articles in this special issue are intended to contribute to the development of new knowledge about depression in women. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Le r?le des interactions mère-enfant et de la dépression maternelle à l'age préscolaire dans la prédiction de l'attachement de l'enfant à l'age scolaire.

Examined the contribution of mother–child partnership and maternal depression during the preschool period to the prediction of the child's attachment classification at early school-age in 91 French-Canadian children. Mother–child interactions were observed during a collaborative task using a scale measuring synchronized and reciprocal social-affective exchanges in the mother-child partnership (age 3–5 yrs). Maternal depression was assessed during the same lab visit using the Beck Depression Inventory. At a second lab visit (age 5–7 yrs), attachment classifications were assigned on the basis of reunion behaviour. A discriminant function analysis showed that reciprocal mother–child partnerships in the absence of maternal depressive symptom predicted security of attachment two years later, whereas failed reciprocity in the presence of maternal depressive symptoms predicted both insecure disorganized and ambivalent attachment. Quality of prediction is high for secure, ambivalent and disorganized children, although ambivalent and disorganized children cannot be distinguished from each other. Results support the importance of mother–child interactions and maternal depression as preschool variables associated with security and insecurity of attachment at early school-age. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A scientometric radiography of Revista Médica de Chile

In the context of a festschrift to commemorate the 125th anniversary of the Revista Médica de Chile, "radiography" of the journal has been depicted using several scientometric indicators. Among the mainstream journals in the category of Medicine, General & Internal and taking into account the wide editorial coverage and the language of the publication that fulfills the need for the required social appropriation of science that the country requires, the Revista Médica de Chile portrays healthy and quite relevant. Among the articles published between 1981 and 1995, some concerning public health have reached, particularly, an impact which surpasses their mean expected citation rate.     

Revue de Neuropsychologie du développement.

Reviews the book, Neuropsychologie de développement (2000). Claude Braun showed courage by writing his Neuropsychology book of the development. It is not frequent that somebody undertakes a task of this width. This work, is very understanding, puts at the range French-speaking people at last knowledge in neuropsychology of the development. Its 26 chapters treat normal and pathological development nervous system, of an exhaustive number of syndromes and their characteristics on the neurological, psychological, diagnostic level and of intervention for then finishing by discussing in a rather thorough way the neuropsychological evaluation of typical cases in a pediatric practice (e.g.: epilepsy, small evil, disease of Gilles of Tourette, etc). Moreover, the topics are treated according to various stages' of the life with the changes which the age causes in the development of the nervous system of the infant, the child of school age, and the teenager. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Validation d’une version fran?aise de l’échelle d’évaluation cognitive primaire de Brewer et Skinner.

The purpose of this paper is to present 2 studies designed to validate a French version of the Cognitive Appraisal Scale (Trait) developed by Skinner and Brewer (2002). A first study evaluated its psychometric properties, factorial structure, and test–retest reliability. A second study tested the construct validity of the scale and its compatibility with 2 versions of the transactionnalist stress model (Lazarus & Folkman, 1984). In conclusion, this scale appears to be an adequate and useful instrument for the study of cognitive appraisal processes. In this early stage of development, it exhibits satisfying psychometric properties, which could be easily enhanced by the withdrawal of 2 items. Moreover, a confirmatory analysis shows that the French version of the scale has a better compatibility with an integrative version of the transactionnalist stress model initially developed by Lazarus and Folkman (1984) than with a more classical one. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

La violence contre l'épouse: Les traitements de couple sont-ils appropriés?

In this paper, we set aside the political and ideological debate and examine the issue from a scientific perspective. We evaluate the soundness of the conceptual foundation of couple approaches to violence by matching the assumptions of each approach with the large body of research on violence against women. Our literature search yielded 25 articles published since 1980 describing systemic and cognitive-behavioural couple approaches to violence within the marriage. Systemic approaches view violence as a symptom of deeper dysfunction with the relationship. Cognitive-behavioural couples approaches are based on the assumption that violent men have difficulties with assertiveness, poor communication skills, and dysfunctional cognitions that are associated with escalations in conflict. Women in turn are assumed to have characteristics that make them susceptible to victimization, to engage in coercive interactional patterns, or to have tendencies that reinforce the man's violent behaviour. Across both systemic and cognitive-behavioural couples therapy for violence, the first stage of therapy focuses on elimination of violence within the relationship and the second stage examines dysfunctional and coercive interactions between the partners. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Valeurs de fréquence subjective et d'imagerie pour un échantillon de 1,916 substantifs de la langue fran?aise.

Reported norms of rated subjective frequency of use and imagery on 7-point scales for 1,916 French nouns in 454 17–29-yr-olds. Interjudge reliability was assessed by calculating the correlation between the mean ratings of items repeated in the booklet, between the mean ratings obtained from odd-numbered and even-numbered respondents, and by computing the Cronbach alpha statistic for each page of the booklet. Results indicate that although the estimates provided by female and male participants were highly correlated, the former gave a slightly higher frequency rating to the word sample but a slightly lower imagery rating than the latter did. Moreover, female respondents gave slightly more extreme ratings on the frequency and imagery scales. An analysis of the absolute difference between female and male ratings revealed a discrepancy of one half point or more on 20% of the word sample for frequency and 13% for imagery. On both scales, the mean absolute difference between male and female ratings was larger than that obtained by chance alone. The mean, standard deviation, and percentile rank of the frequency and imagery ratings for each item are appended together with their objective frequency of occurrence in Baudot's (1992) dictionary. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Analyse spectrophotométrique des solutions ignées: cas des solutions de PbO dans PbCl2

Abstract

The spectrophotometric study of the solutions of lead oxide in molten lead chloride lead the authors to propose a quick analytical method useful for molten solutions which have equivalent optical properties as the studied mixtures.

Résumé

L' étude spectrophotometrique des solutions d'oxyde de plomb dans le chlorure de plomb fondu conduit les auteurs è proposer une méthode rapide de dosage, applicable aux solutions ignées ayant des proprietes optiques comparables è celles des mélanges étudiés.     

Section 3: Mémoire et cognition de haut niveau.

Our memory of the past, our relative position in the world and our single need to seek to explain are as many critical facets of our conscious experiment. The goal of this section is to show the variety of the techniques exploited to examine the relation existing between the intelligence and the brain and, in a way even more important, to show by which new and interesting means is explored the conscious experiment. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

élaboration et validation du Questionnaire de Soutien Conjugal (QSC).

Although partner support represents a significant source of help amongst people (Beach, Fincham, Katz, & Bradbury, 1996; Cutrona, 1996), few valid and reliable measures of couple support are available. The current study presents the elaboration and validation of the “Questionnaire de soutien conjugal” (QSC), a brief measure evaluating given and received support within conjugal relationship. A sample of 270 French-Canadian couples completed the QSC and a short version of the Dyadic Adjustment Scale (Spanier, 1976; Sabourin, Valois, & Lussier, 2005). One year later, 160 couples agreed to complete the same measures again. Exploratory Factor Analyses supported the two-factor structure of the measure (provided support and received support); those factors predicted current and future couple satisfaction. QSC scales also showed good internal consistency as well as good test–retest reliability after a 1-year period. These findings reveal satisfactory psychometric properties and justify the QSC's use in clinical settings and research protocols. Strengths, limitations, and recommendations for futures research are discussed. (PsycINFO Database Record (c) 2011 APA, all rights reserved)