143 research outputs found
The Interfaces Between Strategic Management of an Enterprise and Project Portfolio Management Within the Enterprise
Abstract The aim of this paper is to define in meaningful terms the interfaces or inter-relationships between the business processes used to manage the strategic growth of an enterprise and those used to manage the program/project portfolios within the enterprise. It will clarify the boundaries between strategic management processes and project portfolio management processes, and identify who holds primary responsibilities for these inter-related sets of management processes. The main issues to be considered include: Is it possible to define a clear boundary between strategic and program/project portfolio management processes? It is concluded that this is possible and a boundary definition is presented for consideration. How should we differentiate between strategic project management and operational project management? An approach to such differentiation is proposed. Which, if any, of the strategic project management practices and processes should be considered to be within the domain of "project management"? A descriptive list of these is proposed. What should be the role of a typical PMO in relation to 1) strategic management processes, and 2) both strategic and operational project management processes? A definition of this role is proposed. The importance of identifying the major categories of project portfolios and of major categories projects within those enterprises is also discussed, Keywords Project management, strategic management, strategic project management, operational project management, project management office
Keynote Presentation at the 11 International Project Management Congress of the Istanbul Project Management Association IPYD, Istanbul
ABSTRACT The aim of this paper is to define the interfaces or inter-relationships between the business processes used to manage the strategic growth of an enterprise and those used to manage the program/project portfolios within the enterprise. It will clarify the boundaries between strategic management processes and project portfolio management processes, and identify who holds primary responsibilities for these inter-related sets of management processes. The main issues to be considered include: • Is it possible to define a clear boundary between strategic and program/project portfolio management processes? It is concluded that this is possible and a boundary definition is presented for consideration. • How should we differentiate between strategic project management and operational project management? An approach to such differentiation is proposed. • Which, if any, of the strategic project management practices and processes should be considered to be within the domain of 'project management'? A descriptive list of these is proposed. • What should be the role of a typical PMO in relation to 1) strategic management processes, and 2) both strategic and operational project management processes? A definition of this role is proposed. The importance of identifying the major categories of project portfolios and of major categories projects within those enterprises is also discussed
The Winter Camp of the Viking Great Army, AD 872–3, Torksey, Lincolnshire
This paper presents the results of a multidisciplinary project that has revealed the location, extent
and character of the winter camp of the Viking Great Army at Torksey, Lincolnshire, of AD 872–3.
The camp lay within a naturally defended area of higher ground, partially surrounded by marshes
and bordered by the River Trent on its western side. It is considerably larger than the Viking camp of
873–4 previously excavated at Repton, Derbyshire, and lacks the earthwork defences identified
there. Several thousand individuals overwintered in the camp, including warriors, craftworkers and
merchants. An exceptionally large and rich metalwork assemblage was deposited during the Great
Army’s overwintering, and metal processing and trading was undertaken. There is no evidence for a
pre-existing Anglo-Saxon trading site here; the site appears to have been chosen for its strategic
location and its access to resources. In the wake of the overwintering, Torksey developed as an
important Anglo-Saxon borough with a major wheel-thrown pottery industry and multiple churches
and cemeteries. The Torksey evidence allows for a radical reappraisal of the character of Viking
winter camps, and the legacy of the Viking Great Army for Anglo-Saxon England
Fire History from Life-History: Determining the Fire Regime that a Plant Community Is Adapted Using Life-Histories
Wildfire is a fundamental disturbance process in many ecological communities, and is critical in maintaining the structure of some plant communities. In the past century, changes in global land use practices have led to changes in fire regimes that have radically altered the composition of many plant communities. As the severe biodiversity impacts of inappropriate fire management regimes are recognized, attempts are being made to manage fires within a more ‘natural’ regime. In this aim, the focus has typically been on determining the fire regime to which the community has adapted. Here we take a subtly different approach and focus on the probability of a patch being burnt. We hypothesize that competing sympatric taxa from different plant functional groups are able to coexist due to the stochasticity of the fire regime, which creates opportunities in both time and space that are exploited differentially by each group. We exploit this situation to find the fire probability at which three sympatric grasses, from different functional groups, are able to co-exist. We do this by parameterizing a spatio-temporal simulation model with the life-history strategies of the three species and then search for the fire frequency and scale at which they are able to coexist when in competition. The simulation gives a clear result that these species only coexist across a very narrow range of fire probabilities centred at 0.2. Conversely, fire scale was found only to be important at very large scales. Our work demonstrates the efficacy of using competing sympatric species with different regeneration niches to determine the probability of fire in any given patch. Estimating this probability allows us to construct an expected historical distribution of fire return intervals for the community; a critical resource for managing fire-driven biodiversity in the face of a growing carbon economy and ongoing climate change
Accreting Millisecond X-Ray Pulsars
Accreting Millisecond X-Ray Pulsars (AMXPs) are astrophysical laboratories
without parallel in the study of extreme physics. In this chapter we review the
past fifteen years of discoveries in the field. We summarize the observations
of the fifteen known AMXPs, with a particular emphasis on the multi-wavelength
observations that have been carried out since the discovery of the first AMXP
in 1998. We review accretion torque theory, the pulse formation process, and
how AMXP observations have changed our view on the interaction of plasma and
magnetic fields in strong gravity. We also explain how the AMXPs have deepened
our understanding of the thermonuclear burst process, in particular the
phenomenon of burst oscillations. We conclude with a discussion of the open
problems that remain to be addressed in the future.Comment: Review to appear in "Timing neutron stars: pulsations, oscillations
and explosions", T. Belloni, M. Mendez, C.M. Zhang Eds., ASSL, Springer;
[revision with literature updated, several typos removed, 1 new AMXP added
Diversity Arrays Technology (DArT) for Pan-Genomic Evolutionary Studies of Non-Model Organisms
Background: High-throughput tools for pan-genomic study, especially the DNA microarray platform, have sparked a remarkable increase in data production and enabled a shift in the scale at which biological investigation is possible. The use of microarrays to examine evolutionary relationships and processes, however, is predominantly restricted to model or near-model organisms.
Methodology/Principal Findings: This study explores the utility of Diversity Arrays Technology (DArT) in evolutionary studies of non-model organisms. DArT is a hybridization-based genotyping method that uses microarray technology to identify and type DNA polymorphism. Theoretically applicable to any organism (even one for which no prior genetic data are available), DArT has not yet been explored in exclusively wild sample sets, nor extensively examined in a phylogenetic framework. DArT recovered 1349 markers of largely low copy-number loci in two lineages of seed-free land plants: the diploid fern Asplenium viride and the haploid moss Garovaglia elegans. Direct sequencing of 148 of these DArT markers identified 30 putative loci including four routinely sequenced for evolutionary studies in plants. Phylogenetic analyses of DArT genotypes reveal phylogeographic and substrate specificity patterns in A. viride, a lack of phylogeographic pattern in Australian G. elegans, and additive variation in hybrid or mixed samples.
Conclusions/Significance: These results enable methodological recommendations including procedures for detecting and analysing DArT markers tailored specifically to evolutionary investigations and practical factors informing the decision to use DArT, and raise evolutionary hypotheses concerning substrate specificity and biogeographic patterns. Thus DArT is a demonstrably valuable addition to the set of existing molecular approaches used to infer biological phenomena such as adaptive radiations, population dynamics, hybridization, introgression, ecological differentiation and phylogeography
The effects of prolonged wear of textured shoe insoles on gait, foot sensation and proprioception in people with Multiple Sclerosis: protocol for a randomised controlled trial
Background: Many people with multiple sclerosis experience problems with walking, which can make daily activities difficult and often leads to falls. Foot sensation plays an important role in keeping the body balanced whilst walking; however, people with multiple sclerosis often have poor sensation on the soles of their feet. Wearing a specially designed shoe insole, which enhances plantar sensory information, could help people with multiple sclerosis to walk better. This study will explore whether long-term wear of a textured insole can improve walking in people with multiple sclerosis
Cache coherence requirements for interprocess rendezvous
Multiprocessors in which a shared bus is used by the processor to communicate with common memory are an emerging class of machines where there is a need to support parallel programming languages. A language construct that is found in a number of parallel programming languages to support synchronization and communication in the interprocess rendezvous. Shared-bus multiprocessor require a protocol to keep the date in their caches coherent. There are two major categories of these protocols: invalidation and write-boadcast. This paper examines the requirements for cache coherence protocols to support efficient interprocessor rendezvous. The approach taken is to examine the memory referencing patterns to the run-time data structures during rendezvous execution. The appropriate coherence protocol is shown to be a function of the processor scheduling strategy used by the run-time system at synchronzation points during the rendezvous. When processes migrate freely as a result of the scheduling strategy, invalidation protocols are found to be more efficient. When migration is restricted by the scheduler, write-broadcast protocols are more efficient.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/44571/1/10766_2005_Article_BF01407863.pd
Executive functioning in children with an autism spectrum disorder: Can we differentiate
The aim of this study was to investigate whether children with high-functioning autism (HFA), Asperger's syndrome (AS), and pervasive developmental disorder not otherwise specified (PDDNOS) can be differentiated from each other and from normal controls on their neurocognitive executive functioning (EF) profile. Children with HFA and AS showed the most EF deficits. The EF profile of the PDDNOS group was more disturbed that the normal control group, but was less disturbed than the profile of the HFA and AS groups. Little difference was found between the three PDD subtypes with respect to EF. This study supports the view that executive dysfunctioning plays an important role in autism. The usefulness of a distinction between different PDD subtypes was not demonstrated. © 2006 Springer Science+Business Media, Inc
The reflares and outburst evolution in the accreting millisecond pulsar SAX J1808.4-3658: A disk truncated near co-rotation?
© 2016. The American Astronomical Society. All rights reserved. The accreting millisecond X-ray pulsar SAX J1808.43658 shows peculiar low luminosity states known as "reflares" after the end of the main outburst. During this phase the X-ray luminosity of the source varies by up to three orders of magnitude in less than 12 days. The lowest X-ray luminosity observed reaches a value of ~1032 erg s-1, only a factor of a few brighter than its typical quiescent level. We investigate the 2008 and 2005 reflaring state of SAX J1808.43658 to determine whether there is any evidence for a change in the accretion flow with respect to the main outburst. We perform a multiwavelength photometric and spectral study of the 2005 and 2008 reflares with data collected during an observational campaign covering the near-infrared, optical, ultra-violet and X-ray band. We find that the NIR/optical/UV emission, expected to come from the outer accretion disk, shows variations in luminosity over an order of magnitude. The corresponding X-ray luminosity variations are instead much deeper, spanning about 23 orders of magnitude. The X-ray spectral state observed during the reflares does not change substantially with X-ray luminosity, indicating a rather stable configuration of the accretion flow. We investigate the most likely configuration of the innermost regions of the accretion flow and we infer an accretion disk truncated at or near the co-rotation radius. We interpret these findings as due to either a strong outflow (due to a propeller effect) or a trapped disk (with limited/no outflow) in the inner regions of the accretion flow
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