ARC flash pressure measurement by physical method, effect of metal vapor on ARC blast

2016 ◽  
Author(s):  
Hugh Hoagland ◽  
Claude Maurice ◽  
Andrew Haines ◽  
Andre Maurice
Keyword(s):  
Pressure Measurement ◽  
Physical Method ◽  
Metal Vapor ◽  
Method Effect ◽  
Arc Flash

Arc Flash Pressure Measurement by the Physical Method, Effect of Metal Vapor on Arc Blast

2017 ◽  
Vol 53 (2) ◽  
pp. 1576-1582 ◽  
Author(s):  
Elihu Hugh Hoagland ◽  
Claude Maurice ◽  
Andrew Haines ◽  
Andre Maurice
Keyword(s):  
Pressure Measurement ◽  
Physical Method ◽  
Metal Vapor ◽  
Method Effect ◽  
Arc Flash

scholarly journals Particle Size Measurement by Hydrostatic Pressure Measurement Method —Effect of Initial Concentration

2011 ◽  
Vol 48 (7) ◽  
pp. 456-463 ◽  
Author(s):  
Hiroshi Satone ◽  
Kazuki Nishiuma ◽  
Kenji Iimura ◽  
Michitaka Suzuki ◽  
Takamasa Mori ◽  
...  
Keyword(s):  
Particle Size ◽  
Hydrostatic Pressure ◽  
Pressure Measurement ◽  
Measurement Method ◽  
Size Measurement ◽  
Particle Size Measurement ◽  
Initial Concentration ◽  
Method Effect

Arc Flash Pressure Measurement System Design

2016 ◽  
Vol 52 (6) ◽  
pp. 5241-5247 ◽  
Author(s):  
Zhenyuan Zhang ◽  
Shiuan-Hau Rau ◽  
Wei-Jen Lee ◽  
Tammy Gammon ◽  
Ben C. Johnson
Keyword(s):  
System Design ◽  
Measurement System ◽  
Pressure Measurement ◽  
Arc Flash ◽  
Pressure Measurement System

ARC flash pressure measurement system design

2016 ◽  
Author(s):  
Zhenyuan Zhang ◽  
Shiuan-Hau Rau ◽  
Wei-Jen Lee ◽  
Tammy Gammon ◽  
Ben Johnson
Keyword(s):  
System Design ◽  
Measurement System ◽  
Pressure Measurement ◽  
Arc Flash ◽  
Pressure Measurement System

Transmission Electron Microscopy of Protein Macromolecules

1971 ◽  
Vol 29 ◽  
pp. 424-425
Author(s):  
Henry S. Slayter
Keyword(s):  
Biological Systems ◽  
Metal Vapor ◽  
Resolving Power ◽  
Electron Microscopic ◽  
Chemical Methods ◽  
Molecular Weights ◽  
The Past ◽  
Physical Chemical ◽  
Transmission Electron

Electron microscopic methods have been applied increasingly during the past fifteen years, to problems in structural molecular biology. Used in conjunction with physical chemical methods and/or Fourier methods of analysis, they constitute powerful tools for determining sizes, shapes and modes of aggregation of biopolymers with molecular weights greater than 50, 000. However, the application of the e.m. to the determination of very fine structure approaching the limit of instrumental resolving power in biological systems has not been productive, due to various difficulties such as the destructive effects of dehydration, damage to the specimen by the electron beam, and lack of adequate and specific contrast. One of the most satisfactory methods for contrasting individual macromolecules involves the deposition of heavy metal vapor upon the specimen. We have investigated this process, and present here what we believe to be the more important considerations for optimizing it. Results of the application of these methods to several biological systems including muscle proteins, fibrinogen, ribosomes and chromatin will be discussed.

Evaluation of two methods of teaching blood pressure measurement

1988 ◽  
Vol 52 (9) ◽  
pp. 519-521
Author(s):  
NK Nordstrom ◽  
S Longenecker ◽  
HL Whitacre ◽  
FM Beck
Keyword(s):  
Blood Pressure ◽  
Pressure Measurement ◽  
Blood Pressure Measurement

Question Wording Effects in the Assessment of Global Self-Esteem

2000 ◽  
Vol 16 (1) ◽  
pp. 13-19 ◽  
Author(s):  
Martin Dunbar ◽  
Graeme Ford ◽  
Kate Hunt ◽  
Geoff Der
Keyword(s):  
Reading Ability ◽  
Factor Model ◽  
Self Esteem ◽  
Reading Scores ◽  
Poor Reading ◽  
Method Effect ◽  
Two Samples ◽  
Positive Item ◽  
Method Effects ◽  
Best Fit

Summary: Marsh (1996) produced evidence that method effects associated with negatively worded items might be responsible for the results of earlier factor analytic studies that reported finding positive and negative self-esteem factors in the Rosenberg Global self-esteem scale ( Rosenberg, 1965 ). He analyzed data collected from children using a 7-item self-esteem measure. This report details attempts to replicate Marsh 's analysis in data collected from two samples of adults who completed the full 10-item Global Self-Esteem (GSE) scale. The results reported here are similar to those given by Marsh in so much as a correlated uniquenesses model produced a superior fit to the data than the simple one factor model (without correlated uniquenesses) or the often reported two factor (positive and negative self-esteem) model. However, whilst Marsh reported that the best fit was produced by allowing negative item uniquenesses to correlate with each other, the model that produced the best fit to these data was one that contained correlated positive item uniquenesses. Supporting his claim that differential responding to negative and positive self-esteem items reflects a method effect associated with reading ability, Marsh also showed that factors associated with negative and positive items were most distinct among children who had poor reading scores. We report a similar effect among a sample of older adults where the correlation between these factors was compared across two groups who were selected according to their scores on a test of verbal reasoning.

Confound It!

2019 ◽  
Vol 35 (6) ◽  
pp. 855-867 ◽  
Author(s):  
John T. Kulas ◽  
Rachael Klahr ◽  
Lindsey Knights
Keyword(s):  
Social Desirability ◽  
Response Pattern ◽  
Experimental Manipulation ◽  
Scoring Method ◽  
Method Effect ◽  
Coding Method ◽  
The Social ◽  
Current Article ◽  
Method Factors ◽  
Psychological Inventory

Abstract. Many investigators have noted “reverse-coding” method factors when exploring response pattern structure with psychological inventory data. The current article probes for the existence of a confound in these investigations, whereby an item’s level of saturation with socially desirable content tends to covary with the item’s substantive scale keying. We first investigate its existence, demonstrating that 15 of 16 measures that have been previously implicated as exhibiting a reverse-scoring method effect can also be reasonably characterized as exhibiting a scoring key/social desirability confound. A second set of analyses targets the extent to which the confounding variable may confuse interpretation of factor analytic results and documents strong social desirability associations. The results suggest that assessment developers perhaps consider the social desirability scale value of indicators when constructing scale aggregates (and possibly scales when investigating inter-construct associations). Future investigations would ideally disentangle the confound via experimental manipulation.

How do we sedate children undergoing CSF opening pressure measurement? Results of a Germany-wide survey

2011 ◽  
Vol 42 (S 01) ◽  
Author(s):  
D Tibussek ◽  
F Distelmaier ◽  
S Kummer ◽  
E Mayatepek
Keyword(s):  
Pressure Measurement ◽  
Opening Pressure ◽  
Measurement Results

Technical textiles for protection against Arc-flash fire: Savesplash®

2020 ◽  
pp. 67-78
Author(s):  
Nandan Kumar ◽  
Sainath Shrikant Pawaskar
Keyword(s):  
Attenuation Factor ◽  
Threshold Energy ◽  
Single Layer ◽  
Weather Conditions ◽  
Electric Arc ◽  
Risk Category ◽  
Technical Textiles ◽  
Flash Fire ◽  
Level 3 ◽  
Arc Flash

Flash fire caused by electric arc is different than that caused by flammable liquids/fumes or combustible dusts. A suitable protective clothing for protection against electric arc-flash must be designed as per Indian weather conditions. Currently available garments are manufactured using two or three layers of woven/nonwoven combinations to achieve higher Hazard Risk Category (HRC) rating (level 3 and above). However, they are heavy and not comfortable to the end users. Savesplash® is a single layer inherent flame-retardant knitted fabric. Its arc rating was determined using ASTM standards. It achieved arc thermal performance value (ATPV) of 41 cal/cm2, breakopen threshold energy (E_BT) of 42 cal/cm2 and heat attenuation factor (HAF) of 94% when tested as per ASTM F1959/F1959M-14 which translated into an arc rating of 41 cal/cm2. This is equivalent to HRC level 4 ratings as per National Fire Protection Association’s NFPA 70E standard (USA). Further, cut and sewn gloves (HM-100) developed using Savesplash® fabric reinforced with leather on palm area achieved ATPV of 63 cal/cm2 and HAF of 94.5% when tested as per ASTM F2675/F2675M-13.

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