scholarly journals Chemometrics as a Tool to Gain Insight into Fiber Rope Aging from Infrared Images

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Ellen Marie Nordgård-Hansen ◽  
Håkon Jarle Hassel ◽  
Rune Schlanbusch
Keyword(s):  
Image Processing ◽  
Thermal Properties ◽  
Physical Properties ◽  
Real Life ◽  
Infrared Camera ◽  
Limiting Factor ◽  
Infrared Images ◽  
The Many ◽  
Thermo Physical Properties ◽  
Insight Into

Fiber ropes are steadily gaining in popularity for offshore lifting purposes. One limiting factor is many fibers’ low tolerance for high temperatures. Measurements of rope temperature and changes in thermo-physical properties are therefore highly relevant, a task which may be performed using an infrared camera. Chemometrics is one tool among the many techniques available for image processing. The present paper details results from applying chemometrics to infrared images obtained from recent cyclic-bend-over-sheave testing. It is shown how this tool contributes to separating the various phenomena going on, like changes in thermal properties, vertical rope movement, surface degradation, and rope twist. A brief discussion on the applicability for real-life monitoring is also given.

LD Youth and Mathematics: A Review of Characteristics

1979 ◽  
Vol 2 (1) ◽  
pp. 29-44 ◽  
Author(s):  
John F. Cawley ◽  
Anne M. Fitzmaurice ◽  
Robert Shaw ◽  
Harris Kahn ◽  
Herman Bates
Keyword(s):  
Learning Disabilities ◽  
Real Life ◽  
Learning Disabled ◽  
Mathematical Skills ◽  
Spring Issue ◽  
Final Article ◽  
And Mathematics ◽  
The Many ◽  
Assessment Procedures ◽  
Insight Into

This represents the second in a series of three articles by John F. Cawley and his associates on mathematics and learning disabled students. Based on information gleaned from the literature as well as an extensive data pool collected by the authors, the present article includes an interpretative review of the characteristics of learning disabled youth as they relate to mathematics. The authors delineate the many facets of failure with which the learning disabled youngster is faced. A set of discriminators are specified for identification of certain subgroups of learning disabilities. Finally, the data presented are shown to provide insight into assessment procedures for youth with disabilities in mathematics. The final article in this series on mathematics will appear in the Spring issue of the Quarterly. The focus will be on problem solving and the application of mathematical skills and concepts to “real-life” situations.

Investigation of High Temperature Nanofluids for Solar Thermal Power Conversion and Storage Applications

2010 ◽  
Author(s):  
Donghyun Shin ◽  
Byeongnam Jo ◽  
Hyun-eun Kwak ◽  
Debjyoti Banerjee
Keyword(s):  
Heat Capacity ◽  
Thermal Properties ◽  
High Temperature ◽  
Energy Storage ◽  
Physical Properties ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Molten Salts ◽  
Solar Thermal ◽  
Thermo Physical Properties

The aim of this study is to investigate the enhancement of thermal properties of various high temperature nanofluids for solar thermal energy storage application. In concentrating solar power (CSP) systems, the thermo-physical properties of the heat transfer fluids (HTF) and the thermal energy storage (TES) materials are key to enhancing the overall system efficiency. Molten salts, such as alkali nitrates, alkali carbonates, or eutectics are considered as alternatives to conventional HTF to extend the capabilities of CSP. However, there is limited usage of molten salt eutectics as the HTF material, since the heat capacity of the molten salts are lower than that of conventional HTF. Nanofluid is a mixture of a solvent and nanoparticles. Well dispersed nanoparticles can be used to enhance thermo-physical properties of HTF. In this study, silica (SiO2) and alumina (Al2O3) nanoparticles as well as carbon nanotubes (CNT) were dispersed into a molten salt and a commercially available HTF. The specific heat capacity of the nanofluids were measured and applicability of such nanofluid materials for solar thermal storage applications were explored. Measurements performed using the carbonate eutectics and commercial HTF that are doped with inorganic and organic nano-particles show specific heat capacity enhancements exceeding 5–20% at concentrations of 0.05% to 2.0% by weight. Dimensional analyses and computer simulations were performed to predict the enhancement of thermal properties of the nanofluids. The computational studies were performed using Molecular Dynamics (MD) simulations.

scholarly journals First-Principles Study of Thermo-Physical Properties of Pu-Containing Gd2Zr2O7

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 196
Author(s):  
Pengcheng Li ◽  
Fengai Zhao ◽  
Haiyan Xiao ◽  
Haibin Zhang ◽  
Hengfeng Gong ◽  
...  
Keyword(s):  
Physical Properties ◽  
First Principles ◽  
Density Functional ◽  
Structural Parameters ◽  
Mechanical And Thermal Properties ◽  
Functional Theory ◽  
Waste Immobilization ◽  
Nuclear Waste Immobilization ◽  
Thermo Physical Properties ◽  
Insight Into

A density functional theory plus Hubbard U method is used to investigate how the incorporation of Pu waste into Gd2Zr2O7 pyrochlore influences its thermo-physical properties. It is found that immobilization of Pu at Gd-site of Gd2Zr2O7 has minor effects on the mechanical and thermal properties, whereas substitution of Pu for Zr-site results in remarkable influences on the structural parameters, elastic moduli, elastic isotropy, Debye temperature and electronic structure. The discrepancy in thermo-physical properties between Gd2−yPuyZr2O7 and Gd2Zr2−yPuyO7 may be a result of their different structural and electronic structures. This study provides a direct insight into the thermo-physical properties of Pu-containing Gd2Zr2O7, which will be important for further investigation of nuclear waste immobilization by pyrochlores.

GUTERL H-11

Alloy Digest ◽  
1983 ◽  
Vol 32 (3) ◽  
Keyword(s):  
Physical Properties ◽  
Surface Treatment ◽  
Tool Steel ◽  
Heat Treating ◽  
Work Characteristics ◽  
Jet Engines ◽  
Shock Resistance ◽  
Structural Parts ◽  
Red Hardness ◽  
The Many

Abstract GUTERL H-11 is a 5% chromium hot-work tool steel with an excellent combination of red hardness, shock resistance (toughness) and resistance to abrasion; these are the properties needed for good hot-work characteristics. It will withstand drastic cooling from maximum operating temperatures. Among the many uses for this steel are hot-die applications, structural parts for jet engines and missiles, extrusion mandrels and forging dies. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: TS-412. Producer or source: Guterl Special Steel Corporation.

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