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Expert briefing
Publication date: 20 October 2017

Zimbabwe’s vice president could be sidelined by party

Location:
ZIMBABWE

ZANU-PF infighting.

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DOI: 10.1108/OXAN-DB225246

ISSN: 2633-304X

Keywords

Geographic
Zimbabwe
AF
Topical
economy
politics
social
election
fiscal
government
monetary
party
constitution
human rights
opposition
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Expert briefing
Publication date: 9 March 2017

ZANU-PF divisions will undermine Zimbabwean elections

Location:
ZIMBABWE

The succession struggle within ZANU-PF to replace Mugabe -- widely believed to be physically incapable of serving more than one additional term in office -- has led to…

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DOI: 10.1108/OXAN-DB218498

ISSN: 2633-304X

Keywords

Geographic
Zimbabwe
AF
Topical
politics
social
election
government
party
corruption
espionage
human rights
opposition
technology
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Expert briefing
Publication date: 23 February 2016

New party could shift Zimbabwe's political balance

Location:
ZIMBABWE

Political outlook in Zimbabwe.

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DOI: 10.1108/OXAN-DB209581

ISSN: 2633-304X

Keywords

Geographic
Zimbabwe
AF
Topical
politics
election
government
opposition
party
economy
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Book part
Publication date: 30 May 2006

Inflation Targeting Policy in a Dynamic Keynesian Model with Debt Accumulation: A Japanese Perspective

Toichiro Asada

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Abstract

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Quantitative and Empirical Analysis of Nonlinear Dynamic Macromodels
Type: Book
DOI: https://doi.org/10.1016/S0573-8555(05)77016-4
ISBN: 978-0-44452-122-4

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Article
Publication date: 16 November 2012

Effect of blast cleaning parameters on corrosion of brass parts

N. Masmoudi and M. Khlif

The purpose of this present work is to investigate how different parameters of the blast cleaning process affect properties and quality of brass parts surface. It aims to…

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Abstract

Purpose

The purpose of this present work is to investigate how different parameters of the blast cleaning process affect properties and quality of brass parts surface. It aims to study the following process variables: particle abrasive shape: (spherical (S) and angular (G) shot), particle abrasive size (S170, G40 and G50) and the impact velocity (40 m/s, 60 m/s and 80 m/s).

Design/methodology/approach

An experimental approach based on three testing methods is used to quantify the analysis of particulate contaminants on substrates surfaces. These methods are: SEM, BSEM and EDXA plots from SEM imaging.

Findings

The results obtained clearly show that the particle embedment decreases with decreasing of the size of angular abrasive. An increase in the embedment could be noted as impact velocity increased. It was also found that the angular abrasives have delivered a contamination level higher than that delivered by spherical abrasives. Furthermore, it was demonstrated that the abrasive debris nature embedded in the treated surfaces is the iron. The coupling of this debris with the base metal (copper) in the presence of wetland causes an electrochemical corrosion. Then, if the contamination level decreases, the corrosion rate in treated brass parts by steel shots decreases also.

Originality/value

Search in the case of blast cleaning for the brass parts by steel shots has not been done previously. Using the spherical shape of the abrasive projected with a moderate impact velocity will be a solution in this case.

Details

Multidiscipline Modeling in Materials and Structures, vol. 8 no. 4
Type: Research Article
DOI: https://doi.org/10.1108/15736101211281524
ISSN: 1573-6105

Keywords

  • Blast cleaning
  • Spherical shots
  • Angular grit
  • Brass parts
  • Particle embedment
  • Impact velocity
  • Electrochemical corrosion
  • Corrosion rate
  • Corrosion
  • Velocity
  • Brass

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Article
Publication date: 1 January 1973

Testing of organic pigments

Hoechst Cassella Dyestuffs Ltd

The method described is adopted in Farbwerke Hoechst AG for testing the colouring properties of organic pigments. The method closely follows the instructions for…

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Abstract

The method described is adopted in Farbwerke Hoechst AG for testing the colouring properties of organic pigments. The method closely follows the instructions for determining the relative tinctorial strength of coloured pigments according to DIN 53 204. It has been found to be necessary to make minor modifications in testing organic pigments. A pigment grinder of a specific type is used for the dispersion process. Depending on the dispersibility of the pigment, a known, readily reproducible degree of pigment dispersion is attained, which is comparable to that of a production batch after one to two passages on a triple‐roll mill. Somewhat different results may be obtained if different dispersing equipment is used.

Details

Pigment & Resin Technology, vol. 2 no. 1
Type: Research Article
DOI: https://doi.org/10.1108/eb040884
ISSN: 0369-9420

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Article
Publication date: 10 December 2018

Parametric study on load ratio effect on the flexural bending behaviour of axially-restrained HSS steel beams subjected to fire

Osama (Sam) Salem

In fire condition, the limiting temperature of a restrained steel beam depends on a few parameters, e.g. temperature distributions along and across the beam, beam’s load…

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Abstract

Purpose

In fire condition, the limiting temperature of a restrained steel beam depends on a few parameters, e.g. temperature distributions along and across the beam, beam’s load ratio and span length. The purpose of this study is to investigate the structural fire behaviour of axially restrained steel beams under different beam’s load ratios, taking into consideration the effect of the beam’s end connections configuration.

Design/methodology/approach

A three-dimensional finite element (FE) computer model has been developed to simulate the structural fire behaviour of axially restrained steel beams and their end connections. After successfully validating the developed model against the outcomes of the available large-size fire resistance experiments, the FE model has been used in a parametric study to investigate the beam’s load ratio effect on the behaviour of the axially restrained steel beams and their end connections.

Findings

The parametric study showed that increasing the beam loading level significantly increased the beam deflections at elevated temperatures; where, increasing the beam’s load ratio from 0.5 to 0.9 reduced the beam fire resistance by about 100 s. In contrast, decreasing the beam’s load ratio from 0.5 to 0.3 allowed the beam to easily achieve a 30-min fire resistance rating with no fire protection applied.

Originality/value

Experimental parametric studies are difficult to control in a laboratory setting and are also expensive and time consuming. Therefore, the reasonable accuracy of the validated FE model in reproducing the experimental fire behaviour of steel beams and their end connections makes it a very useful tool for both numerical and analytical studies.

Details

Journal of Structural Fire Engineering, vol. 9 no. 4
Type: Research Article
DOI: https://doi.org/10.1108/JSFE-10-2017-0042
ISSN: 2040-2317

Keywords

  • Fire resistance
  • Beam-to-column connections
  • Finite element modelling
  • Axially-restrained steel beams
  • Beam’s load ratio
  • Hollow structural sections

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Executive summary
Publication date: 25 June 2018

Zimbabwe's Mnangagwa will try ease instability fears

Location:
ZIMBABWE

ZIMBABWE: Mnangagwa will try ease instability fears

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DOI: 10.1108/OXAN-ES235660

ISSN: 2633-304X

Keywords

Geographic
Zimbabwe
AF
Topical
international relations
politics
social
assassination
coup
election
government
military
opposition
party
human rights
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Executive summary
Publication date: 25 November 2015

China-Zimbabwe talks to focus on development loans

Location:
ZIMBABWE/CHINA

ZIMBABWE/CHINA: Talks to focus on development loans

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DOI: 10.1108/OXAN-ES206913

ISSN: 2633-304X

Keywords

Geographic
Zimbabwe
AF
China
ZIMBABWE/CHINA
Topical
economy
aid
corruption
debt
policy
international relations
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Expert briefing
Publication date: 9 October 2015

New Zimbabwe opposition will face uphill battle

Location:
ZIMBABWE

Outlook for Zimbabwe's political parties.

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Details

DOI: 10.1108/OXAN-DB205852

ISSN: 2633-304X

Keywords

Geographic
Zimbabwe
AF
Topical
politics
election
government
mining
opposition
policy
economy
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