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result(s) for
"Linacre, J"
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A new era for central processing and production in CMS
2012
The goal for CMS computing is to maximise the throughput of simulated event generation while also processing event data generated by the detector as quickly and reliably as possible. To maintain this achievement as the quantity of events increases CMS computing has migrated at the Tier 1 level from its old production framework, ProdAgent, to a new one, WMAgent. The WMAgent framework offers improved processing efficiency and increased resource usage as well as a reduction in operational manpower. In addition to the challenges encountered during the design of the WMAgent framework, several operational issues have arisen during its commissioning. The largest operational challenges were in the usage and monitoring of resources, mainly a result of a change in the way work is allocated. Instead of work being assigned to operators, all work is centrally injected and managed in the Request Manager system and the task of the operators has changed from running individual workflows to monitoring the global workload. In this report we present how we tackled some of the operational challenges, and how we benefitted from the lessons learned in the commissioning of the WMAgent framework at the Tier 2 level in late 2011. As case studies, we will show how the WMAgent system performed during some of the large data reprocessing and Monte Carlo simulation campaigns.
Journal Article
Structural and Functional Diversity of Phosphoinositide 3-Kinases and Discussion
by
Vanhaesebroeck, B.
,
Macdougall, L.
,
Koga, H.
in
Amino Acid Sequence
,
Amino acids
,
Conserved Sequence
1996
Phosphoinositide 3-kinases (PI3-kinases) have been shown to be recruited to cell surface receptor signal complexes whose formation is triggered by growth factors, cytokines and other ligands. PI3-kinases are also involved in protein sorting phenomena. A number of PI3-kinase isotypes have been characterised in several laboratories. Here the relations between the PI3-kinases, PI4-kinases and PI5-kinases and other potential phosphoinositide kinases are analysed. A study of the relation of structure to function for sequence motifs defined through the use of homology searches and protein modelling techniques is described and used to assign the family of phosphoinositide kinases to subgroups.
Journal Article
CMS computing operations during run 1
2014
During the first run, CMS collected and processed more than 10B data events and simulated more than 15B events. Up to 100k processor cores were used simultaneously and 100PB of storage was managed. Each month petabytes of data were moved and hundreds of users accessed data samples. In this document we discuss the operational experience from this first run. We present the workflows and data flows that were executed, and we discuss the tools and services developed, and the operations and shift models used to sustain the system. Many techniques were followed from the original computing planning, but some were reactions to difficulties and opportunities. We also address the lessons learned from an operational perspective, and how this is shaping our thoughts for 2015.
Journal Article
Validity of the Test of Infant Motor Performance for prediction of 6-, 9- and 12-month scores on the Alberta Infant Motor Scale
by
Campbell, Suzann K
,
Wright, Benjamin D
,
Kolobe, Thubi HA
in
Ankle - physiology
,
Developmental Disabilities - diagnosis
,
Diagnostic Techniques, Neurological
2002
The Test of Infant Motor Performance (TIMP) is a test of functional movement in infants from 32 weeks' post-conceptional age to 4 months postterm. The purpose of this study was to assess in 96 infants (44 females, 52 males) with varying risk, the relation between measures on the TIMP at 7, 30, 60, and 90 days after term age and percentile ranks (PR) on the Alberta Infant Motor Scale (AIMS). Correlation between scores on the TIMP and the AIMS was highest for TIMP tests at 90 days and AIMS testing at 6 months (r=0.67, p=0.0001), but all comparisons were statistically significant except those between the TIMP at 7 days and AIMS PR at 9 months. In a multiple regression analysis combining a perinatal risk score and 7-day TIMP measures to predict 12-month AIMS PR, risk, but not TIMP, predicted outcome (21% of variance explained). At older ages TIMP measures made increasing contributions to prediction of 12-month AIMS PR (30% of variance explained by 90-day TIMP). The best TIMP score to maximize specificity and correctly identify 84% of the infants above versus below the 10th PR at 6 months was a cut-off point of 1 SD below the mean. The same cut-off point correctly identified 88% of the infants at 12 months. A cut-off of –0.5 SD, however, maximized sensitivity at 92%. A negative test result, i.e. score above –0.5 SD at 3 months, carried only a 2% probability of a poor 12-month outcome. We conclude that TIMP scores significantly predict AIMS PR 6 to 12 months later, but the TIMP at 3 months of age has the greatest degree of validity for predicting motor performance on the AIMS at 12 months and can be used clinically to identify infants likely to benefit from intervention.
Journal Article
New Approaches to Determining Reliability and Validity
2000
The new approaches to determining validity and reliability of physical measurement are not simply methods for obtaining more defensible tests or mathematically better numbers. The new approaches enable both the test user and the test developer to obtain deeper insight into what is being measured and what those measures mean.
Journal Article
The Impact of Uncertainty on Phytoremediation Project Costs
by
Linacre, Nicholas A.
,
Angle, J. Scott
,
Whiting, Steven N.
in
Actuarial Analysis
,
Bioremediation
,
costs
2005
Pollution of the environment by metals and organic contaminants is an intractable global problem, with cleanup costs running into billions of dollars using current engineering technologies. The availability of alternative, cheap and effective technologies would significantly improve the prospects of cleaning-up metal contaminated sites. Phytoremediation has been proposed as an economical and 'green' method of exploiting plants to extract or degrade the contaminants in the soil. To date, the majority of phytoremediation efforts have been directed at leaping the biological, biochemical and agronomic hurdles to deliver a working technology, with scant attention to the economic outlook other than simple estimates of the cost advantages of phytoremediation over other techniques. In this paper we use a deterministic actuarial model to show that uncertainty in project success (the possibility that full clean up may not be realized) may significantly increase the perceived costs of remediation works for decision-makers.
Journal Article
Current understanding of intracellular signalling pathways - Structural and functional diversity of phosphoinositide 3-kinases
1996
Phosphoinositide 3-kinases (PI3-kinases) have been shown to be recruited to cell surface receptor signal complexes whose form ation is triggered by growth factors, cytokines and other ligands. P13-kinases are also involved in protein sorting phenom ena. A num ber of P13-kinase isotypes have been characterised in several laboratories. H ere the relations between the P13-kinases, P14-kinases and P15-kinases and other potential phosphoinositide kinases are analysed. A study of the relation of structure to function for sequence motifs defined through the use of homology searches and protein m odelling techniques is described and used to assign the family of phosphoinositide kinases to subgroups.
Journal Article