scholarly journals Analysis of Contract Source Selection Strategy

2015 ◽  
Author(s):  
Jatan Bastola ◽  
Kenneth E. Findley ◽  
Nathan T. Woodward
Keyword(s):  
Selection Strategy ◽  
Source Selection

Analysis of Contract Source Selection Strategy

2015 ◽  
Author(s):  
Jatan Bastola ◽  
Kenneth E. Findley ◽  
Nathan T. Woodward
Keyword(s):  
Selection Strategy ◽  
Source Selection

Single- and multiple-trait index selection efficiencies in Fraser fir Christmas trees

1994 ◽  
Vol 24 (7) ◽  
pp. 1487-1494 ◽  
Author(s):  
R.J. Arnold ◽  
F.E. Bridgwater ◽  
J.B. Jett
Keyword(s):  
Genetic Variation ◽  
Selection Process ◽  
Selection Strategy ◽  
Index Selection ◽  
Family Selection ◽  
Multiple Trait ◽  
Individual Values ◽  
Source Selection ◽  
Stem Straightness ◽  
Initial Source

Selection methods for Abiesfraseri (Pursh) Poir. for Christmas tree wholesale value were evaluated based on parameters from the species' first genetic field test. For single-trait individual selection, combined individual plus family selection at half rotation age (4 years) on total height (HT4) gave the greatest estimated full rotation (8-year) retail value (VALUE) gain of 24.3%. The best 8-year trait, crown diameter, resulted in a gain of only 22.4%. Incorporation of family mean information together with individual values in the selection process was important in maximizing gains. Only 8-year stem straightness (STR8) had unfavorable genetic and phenotypic correlations with other traits. With multitrait combined optimum index selection, use of Kempthorne restrictions to prevent adverse change in this trait seriously limited gains in other 8-year traits. Severity of this limitation increased for younger age indices, and for those with fewer traits. Unrestricted combined optimum indices offered substantial VALUE gain advantages and only small decreases in STR8. Initial selection among seed sources also increased VALUE gain, despite decreasing the effective additive genetic variation. VALUE gains through initial source selection exceeded gain reductions from the genetic variation decreases. The optimum selection strategy, with 30.5% VALUE gain, involved initial source selection followed by unrestricted combined optimum index selection on HT4, and 4-year density. Though slightly below the maximum, this strategy would provide substantial economic and technical advantage in conducting field tests.

SCALABLE CATALOG INFRASTRUCTURE FOR MANAGING ACCESS COSTS AND SOURCE SELECTION IN WIDE AREA NETWORKS

2008 ◽  
Vol 17 (01) ◽  
pp. 77-109 ◽  
Author(s):  
VLADIMIR ZADOROZHNY ◽  
LOUIQA RASCHID ◽  
AVIGDOR GAL
Keyword(s):  
Transient Behavior ◽  
Data Sources ◽  
Wide Area Networks ◽  
Selection Strategy ◽  
The Internet ◽  
Client Server ◽  
Source Selection ◽  
Access Cost ◽  
Wide Variability ◽  
Cost Distribution

A WAN environment, such as the Internet, connects a federation of hundreds of servers with tens of thousands of clients, which poses a substantial scalability challenge. Clients may choose among sources that vary in both their content and quality as well as in their access latencies. At the same time, Internet accessible data sources exhibit transient behavior; the unpredictable behavior of a dynamic WAN results in a wide variability in access cost (end-to-end latency). This motivates a need for a source selection strategy that requires maintaining access cost distributions (latency profiles) for each client/server pair. However, in the presence of hundreds of servers and thousands of clients, managing latency profiles cannot scale. We present a scalable methodology to manage latency profiles that use non-random associations between client/server pairs. Such non-random associations may be identified by topology-independent measures such as correlation and mutual information. We propose a Catalog infrastructure that implements our methodology and utilize non-randomly associated latency profiles to estimate access cost distribution for client/server pairs. We perform an extensive experimental study demonstrating feasibility and efficiency of our approach.

Optimal Route Selection Strategy in Wireless Mesh Networks

2018 ◽  
Vol 6 (1) ◽  
pp. 238-243
Author(s):  
Pushpender Sarao ◽  
◽  
T. Raghavendra Gupta ◽  
S. Suresh ◽  
◽  
...  
Keyword(s):  
Wireless Mesh Networks ◽  
Mesh Networks ◽  
Selection Strategy ◽  
Route Selection ◽  
Optimal Route ◽  
Wireless Mesh

Evidence for a single mechanism gating perceptual and long-term memory information into working memory

2020 ◽  
Author(s):  
Sam Verschooren ◽  
Yoav Kessler ◽  
Tobias Egner
Keyword(s):  
Working Memory ◽  
Long Term Memory ◽  
Sources Of Information ◽  
Term Memory ◽  
Source Selection ◽  
Single Mechanism ◽  
Gating Mechanism ◽  
Opening And Closing ◽  
Selection Of

An influential view of working memory (WM) holds that its’ contents are controlled by a selective gating mechanism that allows for relevant perceptual information to enter WM when opened, but shields WM contents from interference when closed. In support of this idea, prior studies using the reference-back paradigm have established behavioral costs for opening and closing the gate between perception and WM. WM also frequently requires input from long-term memory (LTM), but it is currently unknown whether a similar gate controls the selection of LTM representations into WM, and how WM gating of perceptual vs. LTM sources of information relate to each other. To address these key theoretical questions, we devised a novel version of the reference-back paradigm, where participants switched between gating perceptual and LTM information into WM. We observed clear evidence for gate opening and closing costs in both cases. Moreover, the pattern of costs associated with gating and source-switching indicated that perceptual and LTM information is gated into WM via a single gate, and rely on a shared source-selection mechanism. These findings extend current models of WM gating to encompass LTM information, and outline a new functional WM architecture.

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