21,063 research outputs found
The thermal dual-probe: its application to the in situ measurement of building envelope moisture content
Customers' need for uniqueness theory versus brand congruence theory: the impact on satisfaction with social network sites
Social media brands may experience a lack of competitiveness and attraction due to the silent negative increase of customers' need for uniqueness (NFU). This is the result of a tension between the theory of brand congruence, that most brands endeavor to establish with their customers, and the theory of consumers' NFU, that many consumers aim to fulfill, that has not been previously examined. Whilst the theory of brand congruence states that consumers have a favorable attitude towards brands that greatly match their self-concept (brand similarity), the theory of uniqueness, when brand similarity is shared with others, generates avoidance of similarities with others, leading to a reduction in engagement and satisfaction. Social media platforms including Facebook are at risk from customers' NFU which significantly reduces users' satisfaction, hence reducing the attractiveness and usage of Facebook. To examine this, the paper identifies the paradox of similarity in relation to both theories and examines the relationship between consumers' socialization within Social Network Sites (SNSs), brand similarity, consumers' need for uniqueness, and consumers' satisfaction with the SNS. The conceptual model was tested using data from 341 consumers in the US. The findings show that whilst satisfaction with the SNS is enhanced by brand similarity and friend liking, it is undermined by customers' need for uniqueness. Implications for online brand communities and SNSs (Facebook) are discussed and guidance for future research is provided
Interparticle Potential up to Next-to-leading Order for Gravitational, Electrical, and Dilatonic Forces
Long-range forces up to next-to-leading order are computed in the framework
of the Einstein-Maxwell-dilaton system by means of a semiclassical approach to
gravity. As has been recently shown, this approach is effective if one of the
masses under consideration is significantly greater than all the energies
involved in the system. Further, we obtain the condition for the equilibrium of
charged masses in the system.Comment: 19 pages, 19 figures, RevTeX4.1. Revised version, Title change
Identities for hyperelliptic P-functions of genus one, two and three in covariant form
We give a covariant treatment of the quadratic differential identities
satisfied by the P-functions on the Jacobian of smooth hyperelliptic curves of
genera 1, 2 and 3
Molecular gas in luminous galactic nuclei
In the last five years, millimeter-wave interferometry has clearly shown the existence of enormous masses (10^9–10^(10)M⊙) of molecular gas concentrated in the nuclear regions (R < 500 pc) of many luminous and ultra-luminous infrared galaxies. In these systems, molecular gas is an obvious source of fuel for nuclear starbursts and active galactic nuclei (AGN). For nearer, lower-luminosity systems there exists less systematic characterization of either the properties or the structure of the nuclear gas. Here we review recent results on the molecular gas in the nuclei of two near, lower-luminosity systems (M51 and NGC 1068) and contrast these results with those for the best studied ultra-luminous IRAS galaxy, Arp 220. For all three galaxies, there now exists CO(2–1) interferometry at high resolution which reveals, for the first time, disks of extremely dense, highly excited gas on scales of 50-300 pc. These structures vary in their levels of axisymmetry, thickness, and clumpiness. However, they share the ability to extinguish optical and near-infrared emission from active or stellar nuclei and perhaps to collimate radio jets and ionized outflows. Within the nuclear regions of these three galaxies, the molecular gas constitutes 10-50% of the total mass, with the most luminous systems having the highest gas mass-fractions
Eco-hydromorphic Classification for Understanding Stream Macroinvertebrate Biodiversity in Brunei Darussalam, Northern Borneo
This is the final version. Available from Academia Sinica via the DOI in this record.Linking ecology with river geomorphology and hydrology (geomorphic and hydraulic template) plays an important role in the study of macroinvertebrate biodiversity. This understanding and knowledge is crucial in implementing sensible conservation
management for ecosystem health monitoring. However, most macroinvertebrate research has been conducted
in temperate ecosystems. This study examines the eco-hydrogeomorphology and macroinvertebrate biodiversity
of two remote tropical streams in northern Borneo (Bukit Pagon catchment, Brunei Darussalam’s highest
mountain - 1850 m) using temperate classification models, more specifically, biotopes. Fast flowing biotopes
were defined as bedrock runs and cobble riffles whilst the slow flowing biotopes were deposition pools.
Macroinvertebrate size structure associated with biotopes, which can influence overall ecological processes,
was also investigated. Forty-three macroinvertebrate taxa were recorded during the study; biodiversity was
similar between the study streams. There were differences among biotopes with the lowest diversity occurring
in fast flowing biotopes (p = 0.05*). Community structure also varied among the biotopes. Cluster analysis of
macroinvertebrate abundance revealed an 0.8 dissimilarity between the fast and slow biotopes. Several taxa
were found in multiple biotopes, which is likely linked to the occurrence of moss and leaf litter. Macroinvertebrate
size structure distribution between the fast and slow biotopes was statistically different. Our findings suggest
biotopes may be an appropriate scale to investigate macroinvertebrate biodiversity in tropical streams.
Specifically, we found that biotopes had different macroinvertebrate communities and richness. Further research
is required to understand the importance of habitat parameters that are not directly related to flow velocities
such as moss. These habitats are important as places of refuge, allowing colonisation that would otherwise be
inhospitable during flood periods.University of Brunei DarussalamThe International Consortium of Universities for the Study of Biodiversity and the Environment (iCUBE
Radiation content of Conformally flat initial data
We study the radiation of energy and linear momentum emitted to infinity by
the headon collision of binary black holes, starting from rest at a finite
initial separation, in the extreme mass ratio limit. For these configurations
we identify the radiation produced by the initially conformally flat choice of
the three geometry. This identification suggests that the radiated energy and
momentum of headon collisions will not be dominated by the details of the
initial data for evolution of holes from initial proper separations
. For non-headon orbits, where the amount of radiation is orders of
magnitude larger, the conformally flat initial data may provide a relative even
better approximation.Comment: 4 pages, 4 figure
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