235 research outputs found
An integrated model of innovation drivers for smaller software firms
High-technology innovation is essential for economic development in industrialized societies. However, innovation practice in smaller software companies has received little attention. We derive software innovation drivers and outputs from a fragmented literature and analyze their empirical relevance using qualitative data from 25 in-depth interviews with software executives in the Silicon Fen. Repeating patterns in the data set revealed through content analysis show that the most important innovation drivers for smaller software firms are external knowledge, leadership and team processes. Specialized innovation tools and techniques are hardly used. We develop a model of software innovation drivers, together with explorative theoretical propositions.This research work is supported by the Danish Research Council: grant no. 12-133180. Many thanks to the interviewees and the participating companies
Uptake of an OHS code of practice by construction firms : barriers and enablers in an Australian industry
The Australian construction industry, reflecting a global trend, is moving towards the implementation of a voluntary code of practice (hereafter VCP) for occupational health and safety. The evidence suggests that highlyvisible clients and project management firms, in addition to their subcontractors, look set to embrace such a code. However, smaller firms not operating in high-profile contracting regimes may prove reticent to adopt a VCP. This paper incorporates qualitative data from a high-profile research project commissioned by Engineers Australia and supported by the Australian Contractors’ Association, Property Council of Australia, Royal Australian Institute of Architects, Association of Consulting Engineers Australia, Australian Procurement and Construction Council, Master Builders Australia and the Australian CRC for Construction Innovation. The paper aims to understand the factors that facilitate or prevent the uptake of the VCP by smaller firms, together with pathways to the adoption of a VCP by industry
Floating of Extended States and Localization Transition in a Weak Magnetic Field
We report results of a numerical study of non-interacting electrons moving in
a random potential in two dimensions in the presence of a weak perpendicular
magnetic field. We study the topological properties of the electronic
eigenstates within a tight binding model. We find that in the weak magnetic
field or strong randomness limit, extended states float up in energy. Further,
the localization length is found to diverge at the insulator phase boundary
with the same exponent as that of the isolated lowest Landau band (high
magnetic field limit).Comment: RevTex, 4 pages, 3 figures available upon reques
Possible Metal/Insulator Transition at B=0 in Two Dimensions
We have studied the zero magnetic field resistivity of unique high- mobility
two-dimensional electron system in silicon. At very low electron density (but
higher than some sample-dependent critical value,
cm), CONVENTIONAL WEAK LOCALIZATION IS OVERPOWERED BY A SHARP DROP OF
RESISTIVITY BY AN ORDER OF MAGNITUDE with decreasing temperature below 1--2 K.
No further evidence for electron localization is seen down to at least 20 mK.
For , the sample is insulating. The resistivity is empirically
found to SCALE WITH TEMPERATURE BOTH BELOW AND ABOVE WITH A SINGLE
PARAMETER which approaches zero at suggesting a metal/ insulator
phase transition.Comment: 10 pages; REVTeX v3.0; 3 POSTSCRIPT figures available upon request;
to be published in PRB, Rapid Commu
Short--range impurity in the vicinity of a saddle point and the levitation of the 2D delocalized states in a magnetic field
The effect of a short--range impurity on the transmission through a
saddle--point potential for an electron, moving in a strong magnetic field, is
studied. It is demonstrated that for a random position of an impurity and
random sign of its potential the impurity--induced mixing of the Landau levels
diminishes {\em on average} the transmission coefficient. This results in an
upward shift (levitation) of the energy position of the delocalized state in a
smooth potential. The magnitude of the shift is estimated. It increases with
decreasing magnetic field as .Comment: LaTeX, 20 page
Uptake of an OHS code of practice by construction firms : barriers and enablers in an Australian industry
The Australian construction industry, reflecting a global trend, is moving towards the implementation of a voluntary code of practice (hereafter VCP) for occupational health and safety. The evidence suggests that highlyvisible clients and project management firms, in addition to their subcontractors, look set to embrace such a code. However, smaller firms not operating in high-profile contracting regimes may prove reticent to adopt a VCP. This paper incorporates qualitative data from a high-profile research project commissioned by Engineers Australia and supported by the Australian Contractors’ Association, Property Council of Australia, Royal Australian Institute of Architects, Association of Consulting Engineers Australia, Australian Procurement and Construction Council, Master Builders Australia and the Australian CRC for Construction Innovation. The paper aims to understand the factors that facilitate or prevent the uptake of the VCP by smaller firms, together with pathways to the adoption of a VCP by industry
Uptake of an OHS code of practice by Australian construction firms
The Australian construction industry is moving towards the implementation of a voluntary code of practice (VCP) for occupational health and safety (OHS). The evidence suggests that highly-visible clients and project management firms, in addition to their subcontractors, will embrace such a code, while smaller firms not operating in high-profile contracting regimes may prove reticent. This paper incorporates qualitative data from a research project commissioned by Engineers Australia and supported by the Australian Contractors’ Association, Property Council of Australia, Royal Australian Institute of Architects, Association of Consulting Engineers Australia, Australian Procurement and Construction Council, Master Builders Australia and the Australian CRC for Construction Innovation. The paper aims to understand the factors that facilitate or prevent the uptake of the proposed VCP by smaller firms, together with pathways to adoption
Uptake of an OHS code of practice by Australian construction firms
The Australian construction industry is moving towards the implementation of a voluntary code of practice (VCP) for occupational health and safety (OHS). The evidence suggests that highly-visible clients and project management firms, in addition to their subcontractors, will embrace such a code, while smaller firms not operating in high-profile contracting regimes may prove reticent. This paper incorporates qualitative data from a research project commissioned by Engineers Australia and supported by the Australian Contractors’ Association, Property Council of Australia, Royal Australian Institute of Architects, Association of Consulting Engineers Australia, Australian Procurement and Construction Council, Master Builders Australia and the Australian CRC for Construction Innovation. The paper aims to understand the factors that facilitate or prevent the uptake of the proposed VCP by smaller firms, together with pathways to adoption
Quantum Hall - insulator transitions in lattice models with strong disorder
We report results of numerical studies of the integer quantum Hall effect in
a tight binding model on a two-dimensional square lattice with non-interacting
electrons, in the presence of a random potential as well as a uniform magnetic
field applied perpendicular to the lattice. We consider field magnitudes such
that the area per flux quantum is commensurate with the lattice structure.
Topological properties of the single electron wave functions are used to
identify current carrying states that are responsible for the quantized Hall
conductance. We study the interplay between the magnetic field and the
disorder, and find a universal pattern with which the current carrying states
are destroyed by increasing disorder strength, and the system driven into an
insulating state. We also discuss how to interpolate results of lattice models
to the continuum limit. The relationship to previous theoretical and
experimental studies of quantum Hall-insulator transitions in strongly
disordered systems at low magnetic fields is discussed.Comment: 20 pages, 6 figure
A Composite Fermion Hofstader Problem: Partially Polarized Density Wave States in the 2/5 FQHE
It is well-known that the 2/5 state is unpolarized at zero Zeeman energy,
while it is fully polarized at large Zeeman energies. A novel state with
charge/spin density wave order for Composite Fermions is proposed to exist at
intermediate values of the Zeeman coupling for 2/5. This state has half the
maximum possible polarization, and can be extended to other incompressible
fractions. A Hartree-Fock calculation based on the new approach for all
fractional quantum Hall states developed by R.Shankar and the author is used to
demonstrate the stability of this state to single-particle excitations, and
compute gaps. We compare our results with a very recent experiment which shows
direct evidence for the existence of such a state, and also with more indirect
evidence from past experiments.Comment: One reference added, minor clarifying change
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