19,154 research outputs found
Expressive Power in First Order Topology
A first order representation (fo.r.) in topology is an assignment of finitary relational structures of the same type to topological spaces in such a way that homeomorphic spaces get sent to isomorphic structures. We first define the notions one f.o.r. is at least as expressive as another relative to a class of spaces and one class of spaces is definable in another relative to an f.o.r. , and prove some general statements. Following this we compare some well-known classes of spaces and first order representations. A principal result is that if X and Y are two Tichonov spaces whose posets of zero-sets are elementarily equivalent then their respective rings of bounded continuous real-valued functions satisfy the same positiveuniversal sentences. The proof of this uses the technique of constructing ultraproducts as direct limits of products in a category theoretic setting
On the topology of conformally compact Einstein 4-manifolds
In this paper we study the topology of conformally compact Einstein
4-manifolds. When the conformal infinity has positive Yamabe invariant and the
renormalized volume is also positive we show that the conformally compact
Einstein 4-manifold will have at most finite fundamental group. Under the
further assumption that the renormalized volume is relatively large, we
conclude that the conformally compact Einstein 4-manifold is diffeomorphic to
and its conformal infinity is diffeomorphic to .Comment: 16 page
The mediation between participative leadership and employee exploratory innovation: Examining intermediate knowledge mechanisms
The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.We examine mediation effects of coworker knowledge sharing and absorptive capacity on the participative leadership–employee exploratory innovation relationship in R&D units of Taiwanese technology firms.
Deploying a time-lagged questionnaire method implemented over four business quarters, data is generated from 1600 paired samples (managers and employees) in R&D units of Taiwanese technology firms.
The structural equation modeling results reveal that (1) participative leadership is positively related to employee exploratory innovation; (2) coworker knowledge and (3) absorptive capacity partially mediate the relationship between participative leadership and employee exploratory innovation independently; and, (4) coworker knowledge sharing in combination with absorptive capacity partially mediates this relationship.
The results extend previous research on participative leadership and innovation by demonstrating that participative leadership is related to employee exploratory innovation (Lee and Meyer-Doyle, 2017; Mom et al., 2009).Results also confirm that participative leadership drives employee exploratory innovation through employee absorptive capacity. This reinforces the need highlighted by Lane et al. (2006) to investigate the role of absorptive capacity at the individual-level. Collectively, while participative leadership is important for employee exploratory innovation it is the knowledge mechanisms existing and interacting at the employee-level that are central to generating increased employee exploratory innovation from this leadership approach
Some Progress in Conformal Geometry
This is a survey paper of our current research on the theory of partial
differential equations in conformal geometry. Our intention is to describe some
of our current works in a rather brief and expository fashion. We are not
giving a comprehensive survey on the subject and references cited here are not
intended to be complete. We introduce a bubble tree structure to study the
degeneration of a class of Yamabe metrics on Bach flat manifolds satisfying
some global conformal bounds on compact manifolds of dimension 4. As
applications, we establish a gap theorem, a finiteness theorem for
diffeomorphism type for this class, and diameter bound of the
-metrics in a class of conformal 4-manifolds. For conformally compact
Einstein metrics we introduce an eigenfunction compactification. As a
consequence we obtain some topological constraints in terms of renormalized
volumes.Comment: This is a contribution to the Proceedings of the 2007 Midwest
Geometry Conference in honor of Thomas P. Branson, published in SIGMA
(Symmetry, Integrability and Geometry: Methods and Applications) at
http://www.emis.de/journals/SIGMA
Selling Australia as "clean and green"
"Green and clean" has been used as a key marketing tool to promote Australian products overseas. The rationale is that consumers are generally concerned about personal health and the environment and will choose, and pay price premiums, for products that are perceived to be clean (good for them) and green (good for the environment) over alternative products. But is Australia seen as clean and green? Is it really why people buy Australian? This paper attempts to investigate such questionsexport marketing, clean green image, Marketing,
Selling Australia as 'Clean and Green'
'Green and clean' has been used as a key marketing tool to promote Australian products overseas. The rationale is that consumers are generally concerned about personal health and the environment and will choose, and pay price premiums, for products that are, or perceived to be, clean (good for them) and green (good for the environment) over alternative products. But is Australia seen as clean and green? Is it really why people buy Australian products? And how effective is it as a marketing tool? This paper attempts to answer some of these questions. The study found that Australia may have a clean green image at present in some of her overseas markets, but to maintain such an image over time, concrete proof of environmental and quality credentials need to be provided to satisfy increasingly more educated and better-informed consumers. Wide adoption of integrated EMS and QA systems by Australian producers and food companies appears to be a means to establish such credentials and substantiate any 'clean and green' claim. Therefore, government policies should focus more on developing a range of tools to encourage good environmental and quality management practices, rather than on promoting the 'clean and green' image. Such campaigns may be counter-productive in the long run as it leads to complacency, rather than raising environmental and quality awareness.export marketing, clean and green, EMS, QA, Environmental Economics and Policy, International Relations/Trade,
Selling Australia as ‘clean and green’
‘Clean and green’ has been used as a marketing tool by Australian governments to promote agricultural products overseas. But how valid are these claims? Is the ‘clean and green’ image campaign effective? And should government be involved? We conclude that Australia may have had a ‘clean and green’ image in some markets, but in the future, concrete proof of environmental and quality credentials will be required to satisfy increasingly better-informed and more demanding customers. We argue that governments cannot, and should not, continue to promote Australian products based on an undefined ‘clean and green’ image. Rather, more resources should be directed to the development, promotion and wide adoption of integrated, credible and well-defined environmental management and quality assurance systems if Australia is to compete effectively in export markets, especially in the longer term.clean and green, EMS, export marketing, food production, food quality, QA, Resource /Energy Economics and Policy,
Optical nanofiber temperature monitoring via double heterodyne detection
Tapered optical fibers (nanofibers) whose diameters are smaller than the
optical wavelength are very fragile and can be easily destroyed if excessively
heated by energy dissipated from the transmitted light. We present a technique
for monitoring the nanofiber temperature using two-stage heterodyne detection.
The phase of the heterodyne output signal is determined by that of the
transmitted optical field, which, in turn, depends on the temperature through
the refractive index. From the phase data, by numerically solving the heat
exchange equations, the temperature distribution along the nanofiber is
determined. The technique is applied to the controlled heating of the nanofiber
by a laser in order to remove rubidium atoms adsorbed on its surface that
substantially degrade its transmission. Almost 90% of the nanofiber's original
transmission is recovered
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