A Comparison of Fertility in Canada and Australia, 1926-2011

2016 ◽  
Vol 43 (1-2) ◽  
pp. 5 ◽  
Author(s):  
Peter McDonald ◽  
Alain Belanger
Keyword(s):  
Mirror Image ◽  
The Other ◽  
Fertility Trends ◽  
Fertility Trend ◽  
Canadian Provinces

Canada and Australia are countries that, through their histories, have had many similarities as described later in the paper. However, they have two obvious differences. First, Australia has no equivalent to the province of Quebec and is not bi-lingual[B1] . If Quebec’s fertility trend was a mirror image of the trends in other provinces in Canada, this would not present a difficulty but, as we demonstrate in this article, the differences between fertility trends in Quebec and the other Canadian provinces go some way towards explaining the historical differences between the Canadian and Australian fertility trends, but only until 1960. [B1]2 nations rather than province

Neural computation of motion in the fly visual system: quadratic nonlinearity of responses induced by picrotoxin in the HS and CH cells

1995 ◽  
Vol 74 (6) ◽  
pp. 2665-2684 ◽  
Author(s):  
Y. Kondoh ◽  
Y. Hasegawa ◽  
J. Okuma ◽  
F. Takahashi
Keyword(s):  
Mean Square Error ◽  
Order Term ◽  
Mirror Image ◽  
Second Order ◽  
The Other ◽  
Linear Component ◽  
Mean Square ◽  
Nonlinear Component ◽  
First Order ◽  
Order Kernel

1. A computational model accounting for motion detection in the fly was examined by comparing responses in motion-sensitive horizontal system (HS) and centrifugal horizontal (CH) cells in the fly's lobula plate with a computer simulation implemented on a motion detector of the correlation type, the Reichardt detector. First-order (linear) and second-order (quadratic nonlinear) Wiener kernels from intracellularly recorded responses to moving patterns were computed by cross correlating with the time-dependent position of the stimulus, and were used to characterize response to motion in those cells. 2. When the fly was stimulated with moving vertical stripes with a spatial wavelength of 5-40 degrees, the HS and CH cells showed basically a biphasic first-order kernel, having an initial depolarization that was followed by hyperpolarization. The linear model matched well with the actual response, with a mean square error of 27% at best, indicating that the linear component comprises a major part of responses in these cells. The second-order nonlinearity was insignificant. When stimulated at a spatial wavelength of 2.5 degrees, the first-order kernel showed a significant decrease in amplitude, and was initially hyperpolarized; the second-order kernel was, on the other hand, well defined, having two hyperpolarizing valleys on the diagonal with two off-diagonal peaks. 3. The blockage of inhibitory interactions in the visual system by application of 10-4 M picrotoxin, however, evoked a nonlinear response that could be decomposed into the sum of the first-order (linear) and second-order (quadratic nonlinear) terms with a mean square error of 30-50%. The first-order term, comprising 10-20% of the picrotoxin-evoked response, is characterized by a differentiating first-order kernel. It thus codes the velocity of motion. The second-order term, comprising 30-40% of the response, is defined by a second-order kernel with two depolarizing peaks on the diagonal and two off-diagonal hyperpolarizing valleys, suggesting that the nonlinear component represents the power of motion. 4. Responses in the Reichardt detector, consisting of two mirror-image subunits with spatiotemporal low-pass filters followed by a multiplication stage, were computer simulated and then analyzed by the Wiener kernel method. The simulated responses were linearly related to the pattern velocity (with a mean square error of 13% for the linear model) and matched well with the observed responses in the HS and CH cells. After the multiplication stage, the linear component comprised 15-25% and the quadratic nonlinear component comprised 60-70% of the simulated response, which was similar to the picrotoxin-induced response in the HS cells. The quadratic nonlinear components were balanced between the right and left sides, and could be eliminated completely by their contralateral counterpart via a subtraction process. On the other hand, the linear component on one side was the mirror image of that on the other side, as expected from the kernel configurations. 5. These results suggest that responses to motion in the HS and CH cells depend on the multiplication process in which both the velocity and power components of motion are computed, and that a putative subtraction process selectively eliminates the nonlinear components but amplifies the linear component. The nonlinear component is directionally insensitive because of its quadratic non-linearity. Therefore the subtraction process allows the subsequent cells integrating motion (such as the HS cells) to tune the direction of motion more sharply.

Microsurgically generated discontinuities provoke heritable changes in cellular handedness of a ciliate, Stylonychia mytilus

Development ◽  
1991 ◽  
Vol 111 (2) ◽  
pp. 337-356
Author(s):  
X.B. Shi ◽  
Z.I. Qiu ◽  
W. He ◽  
J. Frankel
Keyword(s):  
Large Scale ◽  
Mirror Image ◽  
The Other ◽  
Left Edge ◽  
Left Handed ◽  
Specific Manner ◽  
The Right ◽  
Anteroposterior Polarity ◽  
Posterior Anterior ◽  
Stylonychia Mytilus

Stylonychia mytilus is a dorsoventrally flattened ciliate with compound ciliary structures arranged in a specific manner on the cell surface. In mirror-image (MI) doublets of this ciliate, two nearly complete sets of ciliary structures are arrayed side-by-side, one in a normal or ‘right-handed’ (RH) arrangement, the other in a reversed or ‘left-handed’ (LH) arrangement. MI-doublets exist in two forms, one with the RH component on the right, the LH component on the left, and feeding structures near the center (‘buccal-adjoining MI-doublet’); the other with the RH component on the left, the LH component on the right, and feeding structures on the lateral edges (‘buccal-opposing MI-doublet’). We describe an operation that can generate either type of MI-doublet. This operation interchanges large anterior and posterior regions of the cell, transposing the original posterior region anteriorly (P—A) and the original anterior region posteriorly (A—P), while retaining the original anteroposterior polarity of each region. Two sets of new ciliary structures then are formed in mirror-image arrangement, with the set in the P—A region oriented normally and the set in the A—P region undergoing a reversal of polarity along its anteroposterior axis. This sometimes creates end-to-end MI forms, but more commonly produces side-by-side MI-doublets through a folding together of the P—A and A—P regions. This folding occurs because one lateral edge of the cell had been removed during the operation; if the left edge was removed, the complex folds to the left and forms a buccal-adjoining MI-doublet, whereas if the right edge was removed, the complex folds to the right and forms a buccal-opposing MI-doublet. Both types can reorganize and later divide true-to-type, although the ‘buccal-opposing’ type is by far the more stable of the two. The generation of mirror-image forms is dependent on the prior abnormal juxtaposition of regions from opposite ends of the cell, and involves a coordinated respecification of large-scale organization. We interpret this response to be a consequence of intercalation of missing intervening positional values in the zone of posterior-anterior abutment.

On the Ability to Discriminate Original from Mirror-Image Reproductions of Works of Art

Perception ◽  
1975 ◽  
Vol 4 (4) ◽  
pp. 385-389 ◽  
Author(s):  
Patricia Blount ◽  
Janet Holmes ◽  
Jill Rodger ◽  
Max Coltheart ◽  
Chris McManus
Keyword(s):  
Mirror Image ◽  
The Other ◽  
Works Of Art

Subjects were shown pairs of slides; one member of each pair represented a painting in its correct left-right orientation and the other a mirror image of the same painting. For each pair, subjects were asked (a) to choose which they preferred, (b) to choose which they thought was the original, and (c) to rate their confidence that they had seen the picture before. Subjects were only able to discriminate between originals and mirror images for those paintings they were highly confident of having seen before.

Geographic variation in the underwater vocalizations of Weddell seals (Leptonychotes weddelli) from Palmer Peninsula and McMurdo Sound, Antarctica

1983 ◽  
Vol 61 (10) ◽  
pp. 2203-2212 ◽  
Author(s):  
Jeànette A. Thomas ◽  
Ian Stirling
Keyword(s):  
Mating System ◽  
Weddell Seal ◽  
Mirror Image ◽  
The Other ◽  
Mcmurdo Sound ◽  
Breeding Sites ◽  
Weddell Seals ◽  
Antarctic Seals ◽  
Geographic Differences ◽  
Polygynous Mating System

The Weddell seal (Leptonychotes weddelli) is one of the most vocal pinnipeds. The repertoires of subice vocalizations of Weddell seals recorded at Palmer Peninsula and at McMurdo Sound, Antarctica, are different. Although seals at both sites give some of the same vocalizations, there are subtle spectral and temporal differences. In addition each population has unique vocalizations which are not heard at the other site. At Palmer Peninsula, there are several usage characteristics not exhibited at McMurdo Sound, such as mirror-image vocalization pairs and vocalization trios. Weddell seals in McMurdo Sound make extensive use of nine auxiliary sounds, while the Peninsula repertoire has none. Factors which appear to have been important in the development of these geographic differences appear to include strong fidelity to breeding sites, a polygynous mating system, and learning. Geographically different vocal repertoires have potential for identifying discrete breeding stocks of Antarctic seals.

Attitudes toward U.S. and Russian Actions: A Double Standard

1965 ◽  
Vol 16 (1) ◽  
pp. 43-46 ◽  
Author(s):  
Stuart Oskamp
Keyword(s):  
College Students ◽  
Double Standard ◽  
Mirror Image ◽  
The Other ◽  
American Students

In recent years the U. S. A. and Russia have taken many similar or identical actions, e.g., increased their military budgets, made disarmament proposals, signed joint treaties. It was hypothesized that attitudes of American students toward these similar actions would exhibit a double standard, favoring the U. S. A. Parallel 50-item questionnaires were given to 27 college students in a counterbalanced design. As predicted, most U. S. actions were rated much more favorably than the identical Russian action (45 of 50 higher, 30 significant). However, Ss who had just rated one nation's actions were more neutral in rating those of the other nation, suggesting that a balanced presentation of information leads to greater objectivity. The double standard in evaluating international actions is necessary for operation of the “mirror-image effect” described by Bronfenbrenner.

scholarly journals Legionnaires' Disease - Results of a Multicenter Canadian Study

2003 ◽  
Vol 14 (3) ◽  
pp. 154-158 ◽  
Author(s):  
Thomas J Marrie ◽  
Emidio de Carolis ◽  
Victor L Yu ◽  
Janet Stout ◽  
Keyword(s):  
Legionella Pneumophila ◽  
Tertiary Care ◽  
Community Acquired Pneumonia ◽  
The Other ◽  
Urinary Antigen ◽  
Serum Samples ◽  
Eastern Canada ◽  
Legionnaires Disease ◽  
Canadian Provinces ◽  
A Prospective Study

BACKGROUND: There has never been a cross-Canada surveillance project to determine the rate ofLegionellaspecies as a cause of community-acquired pneumonia requiring hospitalization and to determine whether there are any regional differences in the rates of Legionnaires' disease in Canada. Anecdotally, Legionnaires' disease is thought to be uncommon in Western Canada.METHODS: From January, 1996 through to October 31, 1997, a prospective study of the etiology of community acquired pneumonia requiring admission to 15 tertiary care hospitals in eight Canadian provinces was conducted. A urine sample from each patient was tested forLegionella pneumophilaserogroup 1 antigen using a commercially available ELISA assay. A culture of sputum or other respiratory specimens for Legionellaceae was carried out at the discretion of the attending physician. Two hundred thirty-four patients had acute and 6-week convalescent serum samples tested for antibodies toL pneumophilaserogroups 1 through 6 using an ELISA method.RESULTS: 28 of the 850 patients (3.2%) had Legionnaires' disease; 18 of 823 (2.1%) were positive forL pneumophilaserogroup 1 by urinary antigen testing. The rate of Legionnaires' disease, based on urinary antigen, at the Halifax site was higher than that at the other sites (seven of 163 patients versus 11 of 660 [P=0.04]). Of the 28 cases of Legionnaires' disease identified using all methods, 11 of 277 patients (3.9%) were enrolled from Western provinces versus 17 of 573 patients (2.9%) from Eastern provinces (P=nonsignificant).CONCLUSIONS: Legionnaires' disease is just as common in Western as in Eastern Canada.L pneumophilaserogroup 1 may be more common in Halifax than at the other sites studied.

Notes on Insects, Especially Gymnaetron spp. (Coleoptera: Curculionidae), Associated with Toadflax, Liniaria vulgaris Mill. (Scrophulariaceae), in North America

1959 ◽  
Vol 91 (2) ◽  
pp. 116-121 ◽  
Author(s):  
J. Morris Smith
Keyword(s):  
United States ◽  
Biological Control ◽  
North America ◽  
Natural Enemies ◽  
The Other ◽  
Biological Control Agents ◽  
Linaria Vulgaris ◽  
Canadian Provinces

Linaria vulgaris Mill., known commonly as toadflax or butter-and-eggs, is worldwide in its distribution but is a serious weed only in the Canadian provinces of Alberta, Saskatchewan, and Manitoba (Zilke and Coupland, 1954), where it is increasing in importance (Beck, 1954; Carder, 1956; Forbes, 1957). Smith (1956) correlated its relative insignificance as a weed in the other provinces and in the northwestern United States with the occurrence of the curculionid beetle Gylmnaetron antirrhini (Payk.). Investigations on this and other insects that feed on toadflax and an evaluation of their possible use as biological control agents are reported in this paper; also included are some observations on the weedand its natural enemies made since 1950 in all provinces west of Quebec and in the northwestern United States.

Relationship between Frames of Reference and Mirror-Image Reversals

Perception ◽  
10.1068/p5529 ◽  
2007 ◽  
Vol 36 (7) ◽  
pp. 1049-1056 ◽  
Author(s):  
Hirokazu Yoshimura ◽  
Tatsuo Tabata
Keyword(s):  
Mirror Image ◽  
Frame Of Reference ◽  
The Other ◽  
Frames Of Reference ◽  
Physical Aspect ◽  
Other Hand ◽  
Extended Problem ◽  
Left Right Asymmetry ◽  
Common Frame Of Reference ◽  
Intrinsic Frame

The mirror puzzle related to the perception of mirror images as left–right reversed can be more fully understood by considering an extended problem that includes also the perception of mirror images that are not left–right reversed. The purpose of the present study is to clarify the physical aspect of this extended problem logically and parsimoniously. Separate use of the intrinsic frame of reference that belongs to the object and one that belongs to its mirror image always leads to the perception of left–right reversal when the object has left–right asymmetry; on the other hand, the perception of left–right nonreversal is always due to the application of a common frame of reference to the object and its mirror image.

The Canadian Legal Profession

1986 ◽  
Vol 11 (3) ◽  
pp. 447-532 ◽  
Author(s):  
H. W. Arthurs ◽  
R. Weisman ◽  
F. H. Zemans
Keyword(s):  
United States ◽  
Legal Profession ◽  
The United States ◽  
The Other ◽  
Limited Information ◽  
Canadian Experience ◽  
Institutional Structures ◽  
Legal Professions ◽  
Canadian Provinces ◽  
High Degree

This article seeks to weave together the limited information available on the legal professions of the Canadian provinces. Following the same general format as the other comparative studies in this series, it also offers several critical observations of special interest to readers in the United States, whose experience the Canadian bar so closely tracks. The phenomenon of stratification—familiar to American observers—is clearly visible in the Canadian legal profession. Combined with other centrifugal forces, it threatens the unity of a profession which, until recently, has managed to preserve a high degree of cohesion in training, ideology, and institutional structures. On the other hand, in certain respects, the Canadian experience seems to differ from that of the United States, especially in the strength and peculiar structure of publicly funded legal aid schemes, in the profession's continuing formal autonomy and relative immunity from public regulation, and in its long-lasting attachment to apprenticeship as a necessary stage in professional formation. These and other convergences and divergences between the two countries raise questions of general significance: To what extent do the similarities between Canada and the United States verify the assumption implicit in the theoretical literature (principally Abel, Freidson, and Larson) that there is an empirical referent for something called legal professionalism? And to what extent do the differences suggest that containing societies contribute distinctive characteristics to their legal professions, whose qualities are therefore highly contingent?

The Other Side of the Hidden Curriculum: Correspondence Theories and the Labor Process

1980 ◽  
Vol 162 (1) ◽  
pp. 47-66 ◽  
Author(s):  
Michael W. Apple
Keyword(s):  
Social Reproduction ◽  
Hidden Curriculum ◽  
Mirror Image ◽  
The Other ◽  
Labor Process ◽  
Work Culture ◽  
Relative Autonomy ◽  
The Past ◽  
Norms And Values ◽  
The Face

Many analyses of the hidden curriculum have been strongly influenced by correspondence theories, theories which posit a mirror image relationship between the norms and values taught in school and those “required” in the economy. Correspondence theories, however, often miss the elements of resistence, contradiction, and relative autonomy that occur in schools and in the workplace. Studies of the work culture document the past and continued existence of such elements, elements which mediate and can provide the potential for transforming the pressures for social reproduction. We must be very careful of romanticizing such resistance, however, for the terms are often set by owners, not workers. The existence of resistence and contradiction is important, though, since it provides for the possibility of educational action in the face of the power of the hidden curriculum.

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