Selection of Fine-Wool Rams Based on Record of Performance Data

A study was undertaken to identify the engineering properties of aggregates that explain the variability in the frictional performance of seal coat highway overlays. The frictional performance data of 72 test sections and section replicates collected over a period of 8 years were used in the formulation of statistical models that incorporate the significant variables. The effects of traffic, construction, and environmental variables were also considered. Formulated models were of two types: general and individual. The former type attempts to describe frictional performance using the observations collected on all aggregate materials used. The latter describes the performance of individual aggregate groups. Laboratory properties found to be significant included the polish value, impact and abrasion, and soundness properties. The coating of aggregate particles, gradation, and construction placing rates of aggregate and asphalt were also shown to be significant in explaining performance variability. The influence of traffic and region was found to be interactive with the type and properties of aggregates. The formulated models can be used as a tool for predicting the frictional performance of seal coat aggregates, thus providing a better means for the proper selection of aggregates and for the planning of future seal coat construction projects.

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Optimal selection of acoustic leak detection techniques for water pipelines using multi-criteria decision analysis

Management of Environmental Quality An International Journal ◽

10.1108/meq-05-2017-0043 ◽

2018 ◽

Vol 29 (2) ◽

pp. 255-277 ◽

Cited By ~ 3

Author(s):

Sepideh Yazdekhasti ◽

Kalyan Ram Piratla ◽

John C. Matthews ◽

Abdul Khan ◽

Sez Atamturktur

Keyword(s):

Decision Analysis ◽

Leak Detection ◽

Performance Data ◽

Optimal Selection ◽

Water Utility ◽

Typical Application ◽

Content Type ◽

Detection Techniques ◽

Multi Criteria Decision Analysis ◽

Selection Of

Purpose There has been a sustained interest over the past couple of decades in developing sophisticated leak detection techniques (LDTs) that are economical and reliable. Majority of current commercial LDTs are acoustics based and they are not equally suitable to all pipe materials and sizes. There is also limited knowledge on the comparative merits of such acoustics-based leak detection techniques (ALDTs). The purpose of this paper is to review six commercial ALDTs based on four decisive criteria and subsequently develop guidance for the optimal selection of an ALDT. Design/methodology/approach Numerous publications and field demonstration reports are reviewed for evaluating the performance of various ALDTs in this study to inform their optimal selection using an integrated multi-criteria decision analysis (MCDA) framework. The findings are validated using interviews of water utility experts. Findings The study approach and the findings will have a broad impact on the water utility industry by identifying a suite of suitable ALDTs for a range of typical application scenarios. The evaluated ALDTs include listening devices, noise loggers, leak-noise correlators, free-swimming acoustic, tethered acoustic, and acoustic emissions. The evaluation criteria include cost, reliability, access requirements, and the ability to quantify leakage severity. The guidance presented in this paper will support efficient decision making in water utility management to minimize pipeline leakage. Originality/value This study attempts to address the problem of severe dearth of performance data for pipeline inspection techniques. Performance data reported in the published literature on various ALDTs are appropriately aggregated and compared using a MCDA, while the uncertainty in performance data is addressed using the Monte Carlo simulation approach.

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Legibility Criteria in Design and Selection of Data Displays for Group Viewing

Proceedings of the Human Factors Society Annual Meeting ◽

10.1177/1071181379023001103 ◽

1979 ◽

Vol 23 (1) ◽

pp. 411-414 ◽

Cited By ~ 1

Author(s):

D. Shurtleff ◽

W. Wuersch

Keyword(s):

Human Performance ◽

Command And Control ◽

Performance Data ◽

And Control ◽

Display Systems ◽

Selection Of

This study proposes a methodology and legibility criteria for use in the design and selection of group display systems for new and existing command and control facilities. The methodology and criteria are based upon objective human performance data derived from studies in which key display parameters were related to observers' ability to identify displayed data.

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Quantitative Evaluation of Mechanical Oil Spill Cleanup Devices

International Oil Spill Conference Proceedings ◽

10.7901/2169-3358-1973-1-627 ◽

1973 ◽

Vol 1973 (1) ◽

pp. 627-633

Author(s):

J. J. Der ◽

Douglas J. Graham

Keyword(s):

Present Method ◽

Narrow Range ◽

Performance Data ◽

Oil Removal ◽

Open Area ◽

Preliminary Screening ◽

Accurate Performance ◽

Oil Spill Cleanup ◽

Final Selection ◽

Selection Of

ABSTRACT A systematic quantitative method has been developed which can be used for preliminary screening and with the availability of more accurate performance data, used for final evaluation and selection of candidate oil removal devices. This method has been applied to various types of devices available commercially. Although the lack of precision in available performance data precludes selection between devices with close rating, an outstanding score of a device under the present method is an indication of its potential for further study or development. The result shows that for confined area operation inverted belts and a saucer weir with hydro-adjusting feature have high potential. A system based on the mechanized recovery of polyurethane foam rated high for the open area operation. The effectiveness indices for all of the open area devices considered fall in a narrow range, however, and final selection must be based on more accurate data from field and wave tank tests.

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Diurnal Cycles and Work-Rest Scheduling in Unusual Environments

Human Factors The Journal of the Human Factors and Ergonomics Society ◽

10.1177/001872086600800502 ◽

1966 ◽

Vol 8 (5) ◽

pp. 385-398 ◽

Cited By ~ 8

Author(s):

Richard Trumbull

Keyword(s):

Psychological Research ◽

Performance Data ◽

Working Environment ◽

Diurnal Cycles ◽

Duty Cycles ◽

Selection Of

The extension of man's working environment and its control have lead to a new consideration of his “normal“ neuro-physiological and psychological rhythms. There are some fifty such patterns of fluctuating functions within man which have various degrees of influence upon his level of performance and ability to maintain performance. Data are provided from physiological and psychological research in an attempt to provide perspective for selection of appropriate personnel and establishment of work/rest or duty cycles in deference to these influences.

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Association between Natriuretic peptide receptor 2 (npr2) rs208158047 polymorphism and fattening performance of young bulls

Annals of Animal Science ◽

10.2478/aoas-2021-0024 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Jale Metin Kıyıcı ◽

Zeki Emre Şenöz ◽

Mehmet Ulaş Çınar

Keyword(s):

Beef Cattle ◽

Natriuretic Peptide ◽

Average Daily Gain ◽

Performance Data ◽

Natriuretic Peptide Receptor ◽

Peptide Receptor ◽

Fattening Performance ◽

Body Weights ◽

Daily Gain ◽

Selection Of

Abstract The objective of this study was to determine fattening performance data for Charolais, Limousin and Blonde d’Aquitaine beef cattle and associate these data with NPR2 gene 8:g.59961937 T>C (rs208158047) mutation. Experiments were conducted with 176 beef cattle (77 Charolais, 66 Limousin and 33 Blonde d’Aquitaine) at nine months of age. Experiments lasted for 9 months and animals were slaughtered at the age of 18 months. Cattle body weights were determined at four different periods: beginning of fattening (d0), 60th day of fattening (d60), 120th day of fattening (d120) and at the end of fattening (sw). In terms of rs208158047 mutation of Charolais, Limousin and Blonde d’Aquitaine breeds, TT and CT genotypes were identified, and CC genotype was not encountered. The association of average daily gain (ADG) in d0-d60, d0-d120 and d0-sw periods with the genotypes of rs208158047 mutation was found to be significant (P<0.05). Greater ADGs were observed in rs208158047-CT genotypes compared to rs208158047-TT genotypes. These results indicate that the selection of bovine NPR2 gene could be used to ensure the breeding direction for growth related traits of the beef cattle.

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A variationist perspective on borrowing

10.1093/oso/9780190256388.003.0002 ◽

2017 ◽

Author(s):

Shana Poplack

Keyword(s):

Quantitative Analysis ◽

Language Contact ◽

Code Switching ◽

Performance Data ◽

Validity And Reliability ◽

Lexical Borrowing ◽

Language Mixing ◽

Usage Patterns ◽

Selection Of

This chapter reviews the analytical and methodological tenets associated with the variationist perspective on language and outlines its specific applications to the study of language mixing. Key among them are the principled selection of participants and their validation in the community, the primacy of actual bilingual performance data, contextualization of its major manifestations across speakers, mixing strategies (lexical borrowing and code-switching) and language pairs, and systematic quantitative analysis of usage patterns, incorporating checks on the validity and reliability of the results. We explain how the method enables us to address and answer a number of questions that have plagued scholars of language contact for decades.

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Use of alternative rules (other than the 1(2)s) for evaluating interlaboratory performance data.

Clinical Chemistry ◽

10.1093/clinchem/34.2.244 ◽

1988 ◽

Vol 34 (2) ◽

pp. 250-256 ◽

Cited By ~ 4

Author(s):

S S Ehrmeyer ◽

R H Laessig ◽

K Schell

Keyword(s):

Computer Simulation ◽

Proficiency Testing ◽

Narrow Range ◽

Mean Value ◽

Performance Data ◽

Maximum Efficiency ◽

Population Mean ◽

Group Standard ◽

Effective Selection ◽

Selection Of

Abstract Previous studies have documented the ineffectiveness of using either the group mean +/- 2 group standard deviations (SD) or the 1(2)s rule as the standard of acceptable performance in evaluating interlaboratory proficiency testing (PT) data. Using computer simulation of PT data, we evaluated the efficiency of 244 alternatives to the 1(2)s rule, all based on the PT population's mean and SD. Using the traditional interlaboratory PT format, we determined the ability of each rule to correctly identify both good and deficient intralaboratory performance. The rules are based on results from one to five PT samples "analyzed" at the same time. Because the effectiveness of the criteria set for acceptable performance in a PT program is influenced by the population SD, each rule's capabilities were examined for PT populations with interlaboratory SDs ranging from 1% through 10% of the population mean value. All rules achieve their maximum efficiency over a narrow range of interlaboratory SDs. For PT evaluations of intralaboratory performance to be optimally effective, selection of the rule must be based on the SD of the PT population.

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Cognitive gadgets and cognitive priors

Behavioral and Brain Sciences ◽

10.1017/s0140525x19000992 ◽

2019 ◽

Vol 42 ◽

Author(s):

Gian Domenico Iannetti ◽

Giorgio Vallortigara

Keyword(s):

Cognitive Neuroscience ◽

Selection Of

Abstract Some of the foundations of Heyes’ radical reasoning seem to be based on a fractional selection of available evidence. Using an ethological perspective, we argue against Heyes’ rapid dismissal of innate cognitive instincts. Heyes’ use of fMRI studies of literacy to claim that culture assembles pieces of mental technology seems an example of incorrect reverse inferences and overlap theories pervasive in cognitive neuroscience.

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Note on Selection of Coordinate Systems for Geodynamics

International Astronomical Union Colloquium ◽

10.1017/s0252921100051174 ◽

1975 ◽

Vol 26 ◽

pp. 395-407

Author(s):

S. Henriksen

Keyword(s):

Sea Level ◽

The Other ◽

Coordinate Systems ◽

Mean Sea Level ◽

The Earth ◽

The One ◽

Static Systems ◽

Selection Of

The first question to be answered, in seeking coordinate systems for geodynamics, is: what is geodynamics? The answer is, of course, that geodynamics is that part of geophysics which is concerned with movements of the Earth, as opposed to geostatics which is the physics of the stationary Earth. But as far as we know, there is no stationary Earth – epur sic monere. So geodynamics is actually coextensive with geophysics, and coordinate systems suitable for the one should be suitable for the other. At the present time, there are not many coordinate systems, if any, that can be identified with a static Earth. Certainly the only coordinate of aeronomic (atmospheric) interest is the height, and this is usually either as geodynamic height or as pressure. In oceanology, the most important coordinate is depth, and this, like heights in the atmosphere, is expressed as metric depth from mean sea level, as geodynamic depth, or as pressure. Only for the earth do we find “static” systems in use, ana even here there is real question as to whether the systems are dynamic or static. So it would seem that our answer to the question, of what kind, of coordinate systems are we seeking, must be that we are looking for the same systems as are used in geophysics, and these systems are dynamic in nature already – that is, their definition involvestime.

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