2,834 research outputs found
Howie, H J, SX7351
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/393608Surname: HOWIE. Given Name(s) or Initials: H J. Military Service Number or Last Known Location: SX7351. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 34748.214595
Item: [2016.0049.25901] "Howie, H J, SX7351
Semigroups of order-decreasing transformations
No full textLet X be a totally ordered set and consider the semigroups of orderdecreasing (increasing) full (partial, partial one-to-one) transformations of X. In this
Thesis the study of order-increasing full (partial, partial one-to-one) transformations
has been reduced to that of order-decreasing full (partial, partial one-to-one)
transformations and the study of order-decreasing partial transformations to that of
order-decreasing full transformations for both the finite and infinite cases.
For the finite order-decreasing full (partial one-to-one) transformation
semigroups, we obtain results analogous to Howie (1971) and Howie and McFadden
(1990) concerning products of idempotents (quasi-idempotents), and concerning
combinatorial and rank properties. By contrast with the semigroups of order-preserving
transformations and the full transformation semigroup, the semigroups of orderdecreasing
full (partial one-to-one) transformations and their Rees quotient semigroups
are not regular. They are, however, abundant (type A) semigroups in the sense of
Fountain (1982,1979). An explicit characterisation of the minimum semilattice
congruence on the finite semigroups of order-decreasing transformations and their Rees
quotient semigroups is obtained.
If X is an infinite chain then the semigroup S of order-decreasing full
transformations need not be abundant. A necessary and sufficient condition on X is
obtained for S to be abundant. By contrast, for every chain X the semigroup of
order-decreasing partial one-to-one transformations is type A.
The ranks of the nilpotent subsemigroups of the finite semigroups of orderdecreasing
full (partial one-to-one) transformations have been investigated
Phospholemman-dependent regulation of the cardiac Na/K-ATPase activity is modulated by inhibitor-1 sensitive type-1 phosphatase
No full textCardiac Na/K-ATPase (NKA) is regulated by its accessory protein phospholemman (PLM). Whereas kinase-induced PLM phosphorylation has been shown to mediate NKA stimulation, the role of endogenous phosphatases is presently unknown. We investigated the role of protein phosphatase-1 (PP-1) on PLM phosphorylation and NKA activity in rat cardiomyocytes and failing human hearts. Incubation of rat cardiomyocytes with the chemical PP-1/PP-2A inhibitor okadaic acid or the specific PP-1-inhibitor peptide (I-1ct) identified PLM phosphorylation at Ser-68 as the main substrate for PP-1. Moreover, myocytes adenovirally overexpressing PP-1 inhibitor-1 protein (I-1,Ad-I-1/eGFP) showed a 70% increase in PLM Ser-68 phosphorylation and 65% increase in NKA current, compared with enhanced green fluorescence protein (eGFP)-infected controls (Ad-eGFP), using Western blotting and voltage clamping, respectively. Notably, in left ventricular myocardium from patients with heart failure, PLM Ser-68 phosphorylation was similar to 50% lower (n=7) than in nonfailing controls (n=7). We provide the first physiological and biochemical evidence that PLM phosphorylation and cardiac Na/K-ATPase activity are negatively regulated by PP-1 and that this regulatory mechanism could be counteracted by I-1. This novel mechanism is markedly perturbed in failing hearts favoring PLM dephosphorylation and NKA deactivation and thus may contribute to maladaptive hypertrophy and arrhythmogenesis via chronically higher intracellular Na and Ca concentrations.-El-Armouche, A., Wittkopper, K., Fuller, W., Howie, J., Shattock, M. J., Pavlovic, D. Phospholemman-dependent regulation of the cardiac Na/K-ATPase activity is modulated by inhibitor-1 sensitive type-1 phosphatase. FASEB J. 25, 4467-4475 (2011). www.fasebj.org</p
Effect of movement goal on countermovement jump performance: An exploratory analysis of different sporting demands
No full textThis study explored the influence of different counter movement jump (CMJ) goals on performance, kinetic, and kinematic variables between 56 elite track and field (T&F), football, and futsal athletes. Within and between-sport difference were compared when using the goals: (a) “jump as high as possible” (CMJh) and (b) “jump as fast as possible” (CMJf), using a mixed MANOVA and follow-up univariate mixed ANOVAs. Movement goals had a significant main effect on all variables (p < .001). Compared to CMJh, CMJf elicited higher mean propulsive power normalized to body mass (MPPbm ) and reactive strength index (RSI), alongside lower jump height, contraction time (CT), propulsive displacement, and countermovement velocity (CMvelocity). Sport interaction analyses revealed that T&F athletes consistently outperformed the other sports in RSI across both movement goals. Significant differences in MPPbm and CT emerged between T&F and football. Additionally, a significant interaction between Movement goal and Sport was found for CMvelocity, indicated that T&F and football athletes increased their CM velocity under CMJh, while futsal players maintained similar downward velocities across both movement goals. In conclusion, movement goals significantly modify CMJ performance variables in elite athletes, and these effects are further influenced by sport specialization. Furthermore, adaptations in motor control processes according to the specific movement goals emphasize the need for task-specific and context-relevant communication. Coaches should align goal instructions with both the targeted task goals and the athletes’ sporting context to optimize training outcomes and athlete assessment
Rock-forming minerals, Vol. 1 Ortho and Ring Silicates, by W.A. Deer, R. A. Howie and J. Zussman, 1962
No full textRock-forming minerals, Vol. 1 Ortho and Ring Silicates, by W.A. Deer, R. A. Howie and J. Zussman, 1962. In: Bulletin du Groupe français des argiles. Tome 13, nouvelle série n°8, 1962. p. 96
The Powell-Cotton Dioramas and the Re-interpretation of an Idyll
No full textThis research examines the natural habitat dioramas created by Major P.H.G. Powell-Cotton, in doing so
it affects a remembering of a sense of place where a diorama reflects in Mieke Bal's view a three-dimensionality
that draws on architectural space; it then considers the three dimensional representation of
the landscape within the diorama itself; the two-dimensional illusion of a trompe l'oeil landscape
painting; and the exterior space occupied by the viewer. The Powell-Cotton natural habitat dioramas exist
behind large glass screens their purpose follows an aesthetic relationship with the emergence of the
natural habitat diorama and the ability to transfix perception through the re-interpretation of an idyll. The
potential for this practice-based research was to explore the possibility of developing an aesthetic for
sculpture and architectural space. However in focussing on the Powell-Cotton dioramas the notion of
aesthetic attitude would lose ground due to their idiosyncratic, artificial, and extraordinary nature, it then
prepared the basis of interpretation in establishing 'theatres of landscape' as an open concept. With
landscape, a sense of place anticipates various positions and numerous delays; it recollects the cognitive
knowledge brought to the prospect that involves aspects in, of and about landscape. Regarding the
studio-based project, the diorama was placed between the real and the unreal, challenging Bal's rationale
of the cognitive relationship of a diorama to the concept of a discursive space. Where both artist and
viewer 'activates' this space with their presence, they bring their own recollection of landscape and by
assigning landscape with memory the potentiality is where cognition becomes accentuated. Whereas the
unknown and uncharted can refute reality, memory is dependent on what is known both formally and
informally, it places the natural habitat diorama in a visual system that is both constructive and
destructive. Therefore the research methodology examines the historical context of the diorama through a
doctoral thesis by Karen Wonders and an analysis of Louis Daguerre's diorama by Richard Altick.
Following Bal's analysis of the diorama, this created a dilemma - in what ways are the perceptions of the
observer determined, and how are they undermined? Jonathan Crary and Giuliana Bruno considered the
diorama's position in relation to film and film archaeology, which ultimately the diorama and natural
habitat diorama could not compete with. In asking what has Powell-Cotton's museum to offer in the 21st
century, this thesis examines the concept of a diorama, its objectives and correspondingly its failings. As
the dioramas in the Powell-Cotton Museum were undocumented, these dioramas and their written, visual
and architectural relationship to Louis Daguerre offer a contribution to knowledge concurrent with the
relationship of this practice based research project. Whereupon the research diary forms the basis of a
contribution to new knowledge in the construction of small and large-scale dioramas, sculpture and
installations. By challenging Bal's analysis this research practice would investigate natural and projected
light and the visual language of transparency, translucency and opacity in the representation of landscape
and landscape as motif, and progressing to the structural implications of 2D and 3D work
Rock-forming minerals, Vol. 1 Ortho and Ring Silicates, by W.A. Deer, R. A. Howie and J. Zussman, 1962
No full textRock-forming minerals, Vol. 1 Ortho and Ring Silicates, by W.A. Deer, R. A. Howie and J. Zussman, 1962. In: Bulletin du Groupe français des argiles. Tome 13, nouvelle série n°8, 1962. p. 96
GEHALTEONDERRIG VIR ALMAL - SUID-AFRIKA SE SOEKE NA DIE "HEILIGE GRAAL"?
No full textInvitation to and presentation of a lecture by Prof. Howie, 4 August 2011, 17:00, Senate Hall, Hatfield Campus, University of Pretoria.Abstracts in Afrikaans, English and Northern SothoGEHALTEONDERRIG VIR ALMAL - SUID-AFRIKA SE SOEKE NA DIE "HEILIGE GRAAL" ?
aangebied deur prof Sarah Howie.
Internasionale agentskappe fokus die afgelope twee dekades op "onderwys vir almal". Op 'n vasteland waar "onderwys vir almal" tot nog toe onhaalbaar was, het Suid-Afrika die grootse doel gestel om dit teen die internasionale keerdatum, 2015, te bereik. "Onderwys vir almal" behels die voorsiening van onderwys aan almal in die regte ouderdomsgroep, wat dan ook voldoen aan elke mens se universele reg op onderwys. Die uitdaging was om tegelykertyd die gehalte van onderwys in alle skole regoor Suid-Afrika vol te hou en te verbeter. Na dekades van ontneming in talle kontekste is dit belangrik om nie net te praat en te dink oor die haalbaarheid van gehalte-onderwys vir almal nie, maar ook oor die prys wat betaal sal word as dit nie gebeur nie.
Prof Howie is vir die afgelope twee dekades betrokke by die monitering van die kwaliteit van onderrig in Suid-Afrika
en in die res van die wêreld. Sy sal die jongste inligting voorhou oor die status van Suid-Afrika se onderrigvoorsiening
vir almal asook die land se prestasie met betrekking tot die jongste kwaliteit-in-onderrig-aanwysers. Sy sal ook haar
siening deel van Suid-Afrika se uitdagings rakende gehalteonderrig en enkele aanbevelings doen vir die moontlike
bestuur daarvan.THUTO YA KHAWALITHI YA BOHLE - MAITAPISO A AFRIKA BORWA PHEGELELONG YA
"SEPHEGELELWA"?
ka Profesa Sarah Howie
"Thuto ya bohle" e bile sedi ye kgolo go mekgatlo ya boditshabatshaba mengwagasome ye mebedi ya go feta. Mo kontinenteng yeo "thuto ya bohle" e sego ya fihlelelwa le go fihla bjale, Afrika Borwa e ikemiseditse go fihlelela "thuto" ye pele 2015, ye e beilwego ke ba boditshabatshaba, e fihla bofelong. Afrika Borwa e be e lebane le tlhohlo ya go
boloka le/goba go kaonafatsa khwalithi ya thuto go kgabaganya dikolo ka moka tsa ka mo nageng. Ka morago ga go hlokiswa dibaka makaleng a mantsi, go bohlokwa go se bolele fela ka kgonagalo ya go aba thuto ya khwalithi go bohle, eupsa go bolelwe le ka tshenyo ye e ka bakwago ke go se dire bjalo.
Ke sebaka sa mengwagasome ye mebedi ya go feta Profesa Howie a swaragane le go lekola khwalithi ya thuto mo Afrika Borwa le maemong a boditshabatshaba. Profesa o tla fa tshedimoso ya moragorago ka maemo a kabo ya thuto ya bohle mo Afrika Borwa, gape le ka mo e somago ka gona go ya ka ditaetso tsa thuto tsa moragorago mabapi le
khwalithi. Gape o tla bolela ka diponego tsa gagwe go di tlhohlo tseo Afrika Borwa e lebanego natso mabapi le khwalithi ya thuto; gomme o tla fa maele a gore seemo se se ka laolwa bjang.
MOLOKOLOKO WA DITHUTOPHAHLOSO TSA BOTSEBI o fa banyakisisi polatefomo ya go boledisana le batheetsi
ka kakaretso mabapi le dikgatelopele tsa go bonala ka makaleng a bona a botsebi ao a nago le kgonagalo ya go ba
le khutso ka moso.QUALITY EDUCATION FOR ALL - SOUTH AFRICA'S QUEST FOR THE "HOLY GRAIL"?
presented by Prof Sarah Howie. "Education for all" has been the focus of international agencies for the past two decades. On a continent where "education for all" has been unattainable to date, South Africa has set itself the ambitious goal of attaining this by the internationally stipulated deadline of 2015. "Education for all" involves providing education to everyone of appropriate age, thereby satisfying everyone's universal right to access education. The challenge has been to simultaneously maintain and enhance the quality of education in all schools across South Africa. After decades of deprivation in many contexts, it is important to not only discuss and reflect on how achievable quality education for all is, but also, what the cost is of not doing so. Prof Howie has been involved in monitoring the quality of education in South Africa and internationally over the past two decades. She will present the latest information about the status of South Africa's provisioning for education for all, as well as its performance relative to the latest quality in education indicators. She will also give her perspectives on the challenges that South Africa faces regarding the quality of education and make some recommendations on how these could be managed
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