Search results
1 – 10 of over 25000In effort to understand and reduce flood consequences more effectively and strategically, flood risk assessment has been a cornerstone of a long-term flood management. One…
Abstract
In effort to understand and reduce flood consequences more effectively and strategically, flood risk assessment has been a cornerstone of a long-term flood management. One component of flood risk assessment is the estimation of a range of possible damage to an area exposed to flooding, that is, the vulnerability curve. The vulnerability curve can be depicted by a stage–damage relationship. This study attempts to investigate how vulnerability to flooding can be quantitatively assessed using a micro-scale approach in Malaysia’s vulnerable areas. A residential area in Kota Bharu was chosen as the case study area. Depth–damage relationships from a multiple regression function of Department of Irrigation and Drainage Malaysia and spatial variability of residential buildings were used for the micro-scale assessment. Final estimates of expected annual damage were then calculated for each building type at 1-, 3- and 5-day flood durations. Results show that the methodology adopted is feasible to be applied for local-scale assessment flood risk assessment in Malaysia. The results also suggest that applying the methodology is possible when given wider availability of resources and information. This is particularly important for a robust end-to-end flood risk assessment for long-term effective flood management in Malaysia.
Details
Keywords
Investigates the differences in protocols between arbitral tribunals and courts, with particular emphasis on US, Greek and English law. Gives examples of each country and its way…
Abstract
Investigates the differences in protocols between arbitral tribunals and courts, with particular emphasis on US, Greek and English law. Gives examples of each country and its way of using the law in specific circumstances, and shows the variations therein. Sums up that arbitration is much the better way to gok as it avoids delays and expenses, plus the vexation/frustration of normal litigation. Concludes that the US and Greek constitutions and common law tradition in England appear to allow involved parties to choose their own judge, who can thus be an arbitrator. Discusses e‐commerce and speculates on this for the future.
Details
Keywords
The Equal Pay Act 1970 (which came into operation on 29 December 1975) provides for an “equality clause” to be written into all contracts of employment. S.1(2) (a) of the 1970 Act…
Abstract
The Equal Pay Act 1970 (which came into operation on 29 December 1975) provides for an “equality clause” to be written into all contracts of employment. S.1(2) (a) of the 1970 Act (which has been amended by the Sex Discrimination Act 1975) provides:
Tao Wei, Sijin Zhao, Zongzhan Gao, Ke Zhang, Wenxuan Gou and Yangfan Dang
Fatigue and creep are the key factors for the failure of polymethyl methacrylate (PMMA) in the engineering structure, so a great of quantity attention is focused on the life…
Abstract
Purpose
Fatigue and creep are the key factors for the failure of polymethyl methacrylate (PMMA) in the engineering structure, so a great of quantity attention is focused on the life prediction under the creep and fatigue conditions. This paper aims to mainly summarize the traditional life assessment method (S–N curve), life assessment method based on crazing density and life assessment method based on transmittance. S–N curve and classical creep curve are introduced on the traditional life assessment method; the variation of the craze density with the logarithm of cyclic numbers is given in different fatigue load. A linear relationship is obtained, and a higher stress leads to a higher slope, suggesting a faster growth of craze. Furthermore, a craze density model is purposed to describe this relationship; the variation of craze density with the time at different creep load is given. The craze density has two obvious stages. At the first stage, craze density ranged from approximately 0.02 to 0.17, and a linear relationship is obtained. In the following stage, a nonlinear relationship appears till specimen rupture, a new creep life model is proposed to depict two stages. The relationship between transmission and time under creep load is shown. With increasing of time, the transmittance shows a nonlinear decrease. Through polynomial nonlinear fitting, a relationship between the transmittance and residual life can be obtained. To provide reference for the life assessment of transparent materials, the paper compares three life assessment methods of PMMA.
Design/methodology/approach
This paper uses the traditional life assessment method (S–N curve), life assessment method based on crazing density, life assessment method based on transmittance.
Findings
The variation of the craze density with the logarithm of cyclic numbers is given in different fatigue loads. A linear relationship is obtained, and a higher stress leads to a higher slope, suggesting a faster growth of craze. Furthermore, a craze density model is proposed to describe this relationship, and the variation of craze density with the time at different creep loads is given. The craze density has two obvious stages. The relationship between transmission and time under creep load is shown. With increasing of time, the transmittance shows a nonlinear decrease. Through polynomial nonlinear fitting, a relationship between the transmittance and residual life can be obtained.
Originality/value
Fatigue and creep are the key factors for the failure of PMMA in the engineering structure, so a great of quantity attention is focused on the life prediction under the conditions of creep and fatigue. This paper mainly summarizes traditional life assessment method (S–N curve), life assessment method based on crazing density and life assessment method based on transmittance.
Details
Keywords
This paper aims to address an identified gap in hospitality literature. It examines hotel key accounts' perceptions towards revenue management practice and its impact on key…
Abstract
Purpose
This paper aims to address an identified gap in hospitality literature. It examines hotel key accounts' perceptions towards revenue management practice and its impact on key account relationship development.
Design/methodology/approach
A qualitative research approach was adopted for the investigation through in‐depth interviews with account managers from an international hotel company and its key accounts from nine international companies across three main market segments: airlines, corporate and leisure.
Findings
The findings of this study show that revenue management practice has reduced relationship stability and the trust between hotels and their key accounts due to a number of reasons. These include: opportunistic behaviour such as unexpected contract rate increases and/or blocked room availabilities during high‐demand days; imposed contractual restrictions; and undisclosed cheaper rates being available via other distribution channels from the same hotel.
Research limitations/implications
The findings provide limited evidence of total commitment between the two parties and support the “states theory” of relationship development, which appears to be more applicable than the “stages theory” since the hotel key relationships did not necessarily follow a predictable stage‐by‐stage development process and any major incidents could lead to an abrupt termination of the relationship. The in‐depth research findings are limited to one international hotel company's key accounts, which cannot be generalized since it lacks the breadth required for comparability with other organisations.
Originality/value
This paper bridges the gap between revenue management and key account relationship management literature by providing an insight into the key clients' perceptions towards the effects that hotel revenue management practice has had on relationship development.
Details
Keywords
Roni Laslo Roth and Joseph Schwarzwald
The purpose of this paper is to examine Koslowsky and Schwarzwald’s (2009) recent conceptualization of the interpersonal power interaction model which assumed that the choice of…
Abstract
Purpose
The purpose of this paper is to examine Koslowsky and Schwarzwald’s (2009) recent conceptualization of the interpersonal power interaction model which assumed that the choice of power tactics in conflict situations is a sequential process including antecedents, mediators, and the choice of influence tactics. The mediation process is the new component of the model, thus the authors tested two potential mediators – perceived damage and negative emotions – in the choice process.
Design/methodology/approach
Managers (n=240) were presented with conflict scenarios involving one of their subordinates (low/high performing) and differed by conflict type (relations/task and principle/expediency). They indicated the influence tactics they would utilize in the given situation for gaining compliance and completed a series of questionnaires: perceived damage engendered by disobedience, resultant emotion, cognitive closure, and demographics.
Findings
Results indicated that perceived damage, directly and through the mediation of resultant negative emotions, influenced the tendency to opt for harsh tactics. This trend was further affected by the managers’ gender and cognitive closure.
Research limitations/implications
The discussion addresses the empirical validity of the model, the role of rationality and emotion in the process of choosing influence tactics. Practical implications concerning the usage of harsh and soft tactics and the limitation of the self-report method were also discussed.
Originality/value
The contribution of the study is twofolded: proving the empirical validity of the new conceptualization of the model and explaining the dynamic involved in the choice of influence tactics.
Details
Keywords
Tianlai Yu, Linlin Zhang and Zizheng Liu
The fatigue problems of the carriageway slabs of reinforced concrete rib-beam bridges were studied. The analysis of the carriageway slabs could not achieve the actual stress state.
Abstract
Purpose
The fatigue problems of the carriageway slabs of reinforced concrete rib-beam bridges were studied. The analysis of the carriageway slabs could not achieve the actual stress state.
Design/methodology/approach
Based on this characteristic, the reinforced concrete T-beam group structure system was taken as the research object. Four scale models of the carriageway slabs of reinforced concrete ribbed bridges were designed. The fatigue failure modes and actual fatigue resistance of the carriageway slabs with different length-to-side ratios were systematically studied through static load and fatigue experiments. Based on this, the concrete damage plasticity model (CDP model) was combined with numerical simulation analysis to study the influence of the length-to-short-side ratio of the carriageway slab on the fatigue performance and the remaining bearing capacity.
Findings
The results show that the fatigue failure of the carriageway slab is a three-stage failure; the ratio of the long and short sides has a significant effect on the fatigue performance of the carriageway slab. Under the same fatigue load level, the smaller the ratio of the long and short sides of the carriageway slab.
Originality/value
The fatigue resistance of the unidirectional board is significantly lower than that of the bidirectional board. It is recommended to use the bidirectional board in actual engineering design.
Details
Keywords
Feng Luo, Guodong Li and Hao Zhang
The purpose of this paper is to obtain the mechanical behavior and damage mechanism of the coal and rock near the stope under the stress state and stress paths of the surrounding…
Abstract
Purpose
The purpose of this paper is to obtain the mechanical behavior and damage mechanism of the coal and rock near the stope under the stress state and stress paths of the surrounding rock with the dynamic mining.
Design/methodology/approach
Through the three-axial compression test and the uniaxial compression test by meso experiment device, the mechanical behavior and fracture evolution process of coal and rock were studied, and the acoustic emission (AE) characteristics under uniaxial compression of the coal and rock were contrasted.
Findings
Under the three-axial compression, the strength of coal and rock enhance significantly by confining pressure. The volume of outburst coal shows obvious stages: compression is followed by expansion. The coal first appear to undergo compaction under vertical stress due to volume decrease, but with the development of micro- and macro-cracks, the specimens appeared to expand; under the uniaxial compression, through the comparison of stress–strain relationship and the crack propagation process, stress drop and fracture of coal have obvious correlation. The destruction of coal was gradual due to the slow and steady accumulation of internal damage. Due to the influence of the end effect, the specimens show the “conjugate double shear failure”. The failure process of the coal and rock and the characteristics of the AEs have a corresponding relationship: the failure causes a large number of AE events. Before the events peak, there was an initial stage, calm growth stage and explosive growth stage. There were some differences between the rock and coal in the characteristics of the AE.
Originality/value
These research studies are conducted to provide guidance on the basis of mine disaster prevention and control.
Details