818 research outputs found
Structure of the Precambrian rocks of the Davey River area, South-Western Tasmania
The Precambrian quartzites and schists of the Davey
River area are characterised by subvertical foliations
and garnet grade metamorphism. Three metamorphic
events are followed by several episodes of flexural
refolding
Palaeozoic Rocks of the Davey River, South-West Tasmania
A conformable succession in Palaeozoic rocks occurs
at the Davey River at the southern end of the Olga-Hardwood
syncline in S.W. Tasmania, and consists of
the following formations (with approximate thicknesses):
(top) Unit 6
Unit 5
Unit 4
Sandstone
Shale
Sandstone, minor shale,
Unit 3 Shale-sandstone alternation
Unit 2 Pebbly sandstone
(bottom)
10 metres
15 metres
conglornerate
75 metres
0.,500 metres
0-.500 metres
Unit Quartzite conglomerate 0-800 metres
Formations 1, 2 and 3 are equivalent, on lithological
and structural grounds, to the Bathurst
Harbour Sequence of Jennings (1961). Unit 4 has lithological
and faunal similarities with the Caroline
Creek Sandstone of the West Coast Ordovician
succession (Banks 1962b). Equivalents of the Florentine
Valley Mudstone and Gordon Limestone are pwhably
also present in the centre of the syncline,
If these correlations arc correct the Davey River
succession provides a link between the Bathnrst Harbour
and West Coast successions, with the Long Bay Shale
representing a marine formation which is present in the
South-west but apparently absent on the West Coast
Valuing Governance
Book Summary: As has been abundantly documented in the popular and academic press, the humanities are facing challenging times marked by national debate regarding the importance of the humanities in higher education, program and budget cuts, and an ever-decreasing number of tenure-track jobs. In addition, the humanities face quite literally a quantification of their value as the Academy adopts a more corporate mindset.
This volume provides advice to professionals in the humanities on how to forge a useful, compelling, and productive career. The book’s 13 chapters address professional approaches to developing and maintaining an active research agenda, fomenting the ideals of the teacher-scholar model, managing the service demands within and outside the college or university, and navigating institutional politics. The collection offers practical and theoretical approaches to higher education, personal anecdotes, intelligent advice, and interviews with colleagues in the humanities.
Specific themes addressed include the transition from graduate student to humanities professional, diverging from prescribed paths, the humanities professor as creative writer, moving from secondary to post-secondary education, humanities in an international, market-based context, and participation in governance structures. [From the publisher]
Chapter Summary: This essay focuses on providing insight and practical advice on how committed participation in the governance process offers many positives at any stage of the academic ladder. Drawing upon a practical, theoretical, and anecdotal approach, this article reflects on four areas that are enhanced by participation in governance: 1) visibility; 2) knowledge of the institution and its culture; 3) establishing meaningful friendships campus-wide; and 4) governance as a resource of invaluable advice
The Precursors and Products of Justice Climates: Group Leader Antecedents and Employee Attitudinal Consequences
Drawing on the organizational justice, organizational climate, leadership and personality, and social comparison theory literatures, we develop hypotheses about the effects of leader personality on the development of three types of justice climates (e.g., procedural, interpersonal, and informational), and the moderating effects of these climates on individual level justice- attitude relationships. Largely consistent with the theoretically-derived hypotheses, the results showed that leader (a) agreeableness was positively related to procedural, interpersonal and informational justice climates, (b) conscientiousness was positively related to a procedural justice climate, and (c) neuroticism was negatively related to all three types of justice climates. Further, consistent with social comparison theory, multilevel data analyses revealed that the relationship between individual justice perceptions and job attitudes (e.g., job satisfaction, commitment) was moderated by justice climate such that the relationships were stronger when justice climate was high
The Structure of Winds in AGB Stars
Most dusty winds are described by a set of similarity functions of a single
independent variable that can be chosen as the overall optical depth at visual.
The self-similarity implies general scaling relations among the system
parameters, in agreement with observations. Dust drift through the gas has a
major impact on the structure of most winds.Comment: To appear in proc. of "Workshop on Mass-Losing Pulsating Stars and
their Circumstellar Matter", Sendai, Japan (May 2002
The Analyticity of a Generalized Ruelle's Operator
In this work we propose a generalization of the concept of Ruelle operator
for one dimensional lattices used in thermodynamic formalism and ergodic
optimization, which we call generalized Ruelle operator, that generalizes both
the Ruelle operator proposed in [BCLMS] and the Perron Frobenius operator
defined in [Bowen]. We suppose the alphabet is given by a compact metric space,
and consider a general a-priori measure to define the operator. We also
consider the case where the set of symbols that can follow a given symbol of
the alphabet depends on such symbol, which is an extension of the original
concept of transition matrices from the theory of subshifts of finite type. We
prove the analyticity of the Ruelle operator and present some examples
Household Transmission of Rotavirus in a Community with Rotavirus Vaccination in Quininde, Ecuador
Background: We studied the transmission of rotavirus infection in households in peri-urban Ecuador in the vaccination era.
Methods: Stool samples were collected from household contacts of child rotavirus cases, diarrhea controls and healthy controls following presentation of the index child to health facilities. Rotavirus infection status of contacts was determined by RT-qPCR. We examined factors associated with transmissibility (index-case characteristics) and susceptibility (householdcontact
characteristics).
Results: Amongst cases, diarrhea controls and healthy control household contacts, infection attack rates (iAR) were 55%, 8% and 2%, (n = 137, 130, 137) respectively. iARs were higher from index cases with vomiting, and amongst siblings. Disease ARs were higher when the index child was ,18 months and had vomiting, with household contact ,10 years and those sharing a room with the index case being more susceptible. We found no evidence of asymptomatic infections leading to disease transmission.
Conclusion: Transmission rates of rotavirus are high in households with an infected child, while background infections are rare. We have identified factors associated with transmission (vomiting/young age of index case) and susceptibility (young age/sharing a room/being a sibling of the index case). Vaccination may lead to indirect benefits by averting episodes or reducing symptoms in vaccinees
Magnetoresistance through a single molecule
The use of single molecules to design electronic devices is an extremely
challenging and fundamentally different approach to further downsizing
electronic circuits. Two-terminal molecular devices such as diodes were first
predicted [1] and, more recently, measured experimentally [2]. The addition of
a gate then enabled the study of molecular transistors [3-5]. In general terms,
in order to increase data processing capabilities, one may not only consider
the electron's charge but also its spin [6,7]. This concept has been pioneered
in giant magnetoresistance (GMR) junctions that consist of thin metallic films
[8,9]. Spin transport across molecules, i.e. Molecular Spintronics remains,
however, a challenging endeavor. As an important first step in this field, we
have performed an experimental and theoretical study on spin transport across a
molecular GMR junction consisting of two ferromagnetic electrodes bridged by a
single hydrogen phthalocyanine (H2Pc) molecule. We observe that even though
H2Pc in itself is nonmagnetic, incorporating it into a molecular junction can
enhance the magnetoresistance by one order of magnitude to 52%.Comment: To appear in Nature Nanotechnology. Present version is the first
submission to Nature Nanotechnology, from May 18th, 201
Measurement of the adhesion between single melamine-formaldehyde resin microparticles and a flat fabric surface using AFM
An understanding of the adhesion of microparticles, particularly microcapsules, containing a functional component to a fabric surface is crucial to an effective application of this component to the fibre. Fabric surface is very rough; hence, direct measurement of the adhesion of single microparticles to surfaces with a roughness greater than the particle diameter is difficult. In the study reported here, cotton films were generated by dissolving cotton powder in an organic solvent and their properties including surface roughness, thickness, contact angle and purity were characterised. The adhesive forces between single melamineformaldehyde (MF) resin microparticles and a cotton film under ambient conditions with a relative humidity of above 40% were measured using atomic force microscopy; they are considered to be dominated by capillary forces. It was found that there was little adhesion between a MF microparticle and a cotton film in an aqueous solution of sodium dodecylbenzene sulphonate as surfactant. Repulsion between them was observed, but it reduced with increase in the surfactant concentration and decrease in the pH of the solution. The repulsion contributions are thought to originate mainly from electrostatic repulsion. It is believed that the studies on the adhesion between single MF microparticles and a cotton film under ambient conditions or dispersed in surfactant solutions, are beneficial to the attempts to enhance the adhesion of microcapsules to fabric surfaces via a modification of their surface composition and morphology
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