Search results

1 – 10 of over 49000
Article
Publication date: 12 March 2024

Shuowen Yan, Pu Xue, Long Liu and M.S. Zahran

This study aims to investigate the design and optimization of landing gear buffers to improve the landing-phase comfort of civil aircraft.

Abstract

Purpose

This study aims to investigate the design and optimization of landing gear buffers to improve the landing-phase comfort of civil aircraft.

Design/methodology/approach

The vibration comfort during the landing and taxiing phases is calculated and evaluated based on the flight-testing data for a type of civil aircraft. The calculation and evaluation are under the guidance of the vibration comfort standard of GB/T13441.1-2007 and related files. The authors establish here a rigid-flexible coupled multibody dynamics finite element model of one full-size aircraft. Furthermore, the authors also implement a dynamic simulation for the landing and taxiing processes. Also, an analysis of how the main parameters of the buffers affect the vibration comfort is presented. Finally, the optimization of the single-chamber and double-chamber buffers in the landing gear is performed considering vibration comfort.

Findings

The double-chamber buffer with optimized parameters in landing gear can improve the vibration comfort of the aircraft during the landing and taxiing phases. Moreover, the comfort index can be increased by 25.6% more than that of a single-chamber type.

Originality/value

To the best of the authors’ knowledge, this study first investigates the evaluation methods and evaluation indexes on the aircraft vibration comfort, then further conducts the optimization of the parameters of landing gear buffer with different structures, so as to improve the comfort of aircraft passengers during landing process. Most of the current studies on aircraft landing gear have focused on the strength and safety of the landing gear, with very limited research on cabin vibration comfort during landing and subsequent taxiing because of the coupling of runway surface unevenness and airframe vibration.

Details

Aircraft Engineering and Aerospace Technology, vol. 96 no. 3
Type: Research Article
ISSN: 1748-8842

Keywords

Article
Publication date: 1 June 2018

Lin Yu-Sheng and Pi Ying Lai

All countries are addressing the drastic climate changes as high priority issues. The impact of climate change on coastal land use in Taiwan has been especially severe due to the…

Abstract

All countries are addressing the drastic climate changes as high priority issues. The impact of climate change on coastal land use in Taiwan has been especially severe due to the country's long coastline. As such, developing strategies to promote the protection of coastal land is critical for the sustainable development of the land. At present, even though the central government has developed the relevant adaptation strategies and implementation plans in response to climate change. Due to the limited resources, determining which protection strategy should be implemented as a top priority will require a strategic evaluation for planning and reference purposes.

While most of the existing literature on coastal land use has been focused on the establishment of a vulnerability index along with an analysis of adaptation strategies very little of the existing literature discusses research that has been conducted in relation to an in-depth analysis of climate change and coastal land use. Therefore, this study uses the fuzzy analytic hierarchy process to conduct an exploration of coastal land use and protection strategy. The study compiled the literature and related data to establish five major assessment dimensions and 16 protection strategy evaluation indicators. After the empirical investigation and analysis, the findings demonstrated that the designation of coastal conservation areas is the most important aspect in terms of strategies to protect coastal land, followed by land subsidence control and the establishment of land disaster warning systems.

Details

Open House International, vol. 43 no. 2
Type: Research Article
ISSN: 0168-2601

Keywords

Article
Publication date: 1 April 2006

Hing Fung Leung

To study the nature of covenants for planning control from a legal perspective; to examine the legal mechanisms by which different parties may be bound by covenants and to…

876

Abstract

Purpose

To study the nature of covenants for planning control from a legal perspective; to examine the legal mechanisms by which different parties may be bound by covenants and to illustrate the better legal meaning for the idea of “planning by contract”.

Design/methodology/approach

The legal principles in Hong Kong relating to how land covenants may affect land owners are used in analyzing the concept of “planning by contract”, which conveys a meaning of an origin from the concept of privity of contract. Examples by reference to real life cases are used to illustrate how planning control through covenants has affected land owners.

Findings

Covenants relating to planning control in land leases affect not only the original government lessees but also all subsequent owners to the land. The operation of planning control through covenants is more than a concept based on operation of contract.

Research limitations/implications

The analysis is largely based on the law in Hong Kong. The extent to which the analysis may apply elsewhere is a matter depending on the legal framework in the operation of land covenants at different places.

Practical implications

Land owners and facility managers should fully understand the mechanism by which land covenants may bind land owners even if they have never agreed to the covenants and that the development potential of the property may be seriously affected.

Originality/value

This paper will serve as an aid to land owners and facility managers to understand the mechanism by which land covenants may affect the land and its development potential.

Details

Facilities, vol. 24 no. 5/6
Type: Research Article
ISSN: 0263-2772

Keywords

Article
Publication date: 1 January 2013

Shivani Sood, Vibhor Sood, R. Bansal and Siby John

The purpose of this paper is to analyse the urban stormwater quality with respect to different land uses, with a view to identifying areas of critical pollution. These areas can…

Abstract

Purpose

The purpose of this paper is to analyse the urban stormwater quality with respect to different land uses, with a view to identifying areas of critical pollution. These areas can then be prioritised for applying best management practices.

Design/methodology/approach

Major land use types of the study area were mapped. Sampling sites were selected on the basis of designated land use and land cover pattern. Grab samples of runoff were manually collected from the downstream direction of the road runoff in the designated sampling sites in the respective zones during the rainfall events and analysed.

Findings

The stormwater quality varies with land use pattern. In industrial and commercial zones the pollutants were often found to exceed the permissible limits as per Indian standards. The spatial variation in pollutant distribution in the stormwater was highly influenced by the surrounding land use type.

Practical implications

The relationship between stormwater quality and different land uses presented in this paper offers practical guidance in future planning of urban developments. The thematic maps developed based on GIS can be used as an iterative decision‐making tool.

Originality/value

It can be concluded that while suggesting best management practices or pollutant control systems, land use should be taken into consideration.

Details

Management of Environmental Quality: An International Journal, vol. 24 no. 1
Type: Research Article
ISSN: 1477-7835

Keywords

Article
Publication date: 13 February 2007

P.S. Ogedengbe

The purpose of this paper is to focus on the problems of compensation for compulsory acquisition of oil exploration fields in Delta State with particular reference to the oil…

1376

Abstract

Purpose

The purpose of this paper is to focus on the problems of compensation for compulsory acquisition of oil exploration fields in Delta State with particular reference to the oil field acquired by Agip Oil Company for gas pipeline way leave in Irri and Okpai towns of Delta State.

Design/methodology/approach

A survey was conducted in which questionnaires were administered on some residents whose lands were acquired compulsorily on one hand and some estate surveying and valuation firms who are professionals in the fields of compensation on the other hand. The data collected were analyzed and presented using simple statistical methods.

Findings

The findings in this paper show that the compensation paid to residents whose lands were acquired is grossly inadequate, since professionals are not always involved in the process.

Practical implications

The paper shows that the issue of compensation for compulsory acquisition for oil exploration is very central in the oil‐rich Niger‐Delta, and if this is not handled carefully, it can lead to uncontrollable crisis.

Originality/value

This paper empirically examined the process involved in compulsory acquisition and compensation of land in the Niger‐Delta for oil exploration with a view to determining the adequacy or otherwise of the compensation paid.

Details

Journal of Property Investment & Finance, vol. 25 no. 1
Type: Research Article
ISSN: 1463-578X

Keywords

Article
Publication date: 1 October 2002

Shouzhi Wu and Jianqing Jin

This paper addresses the practical problem of apportioning the value of land equitably between joint owners of developed property in China in a logical way. Allocation of land…

464

Abstract

This paper addresses the practical problem of apportioning the value of land equitably between joint owners of developed property in China in a logical way. Allocation of land share by existing methods causes unfairness. A new concept, using the ratio of land floor value, is introduced and an alternative approach is thereby established. To find such ratios using market data, related statistical techniques and procedures are given. The discussion suggests that the approach is logical in theory and easy to use in practice.

Details

Property Management, vol. 20 no. 4
Type: Research Article
ISSN: 0263-7472

Keywords

Article
Publication date: 8 March 2011

Graeme Newell, Nelson Chan and Evan Goodridge

This paper aims to assess all compulsory land acquisition court decisions in Australia over 1985‐2009 to provide a risk assessment and compensation analysis involved in proceeding…

1403

Abstract

Purpose

This paper aims to assess all compulsory land acquisition court decisions in Australia over 1985‐2009 to provide a risk assessment and compensation analysis involved in proceeding to court for compulsory land acquisition cases.

Design/methodology/approach

Using the AustLII legal database, every publicly available compulsory land acquisition court case decision in Australia over 1985‐2009 is assessed. These 58 court cases are assessed for claim, offer and judgment value.

Findings

A total of 91.4 percent of compulsory land acquisition court cases over 1985‐2009 were found to be successful in achieving a judgment value of at least that of the offer. The median judgment value for successful cases was 60 percent higher than the offer value, while for unsuccessful cases it was 68 percent lower than the offer value. Successful smaller judgments (<$2 million) generated more upside compensation (median of 66 percent) than larger judgments (>$2 million) (median 41 percent upside compensation). Appealed cases were found to be only 28.6 percent successful, with only a maximum of 5.6 percent additional compensation achieved.

Practical implications

This paper provides a rigorous empirical risk assessment and compensation analysis for compulsory land acquisition court cases in Australia over the last 25 years. This provides an effective tool for dispossessed property owners, statutory acquirers and their professional legal and valuation advisors for more informed compulsory land acquisition court case decision making.

Originality/value

Using all compulsory land acquisition court decisions in Australia over the last 25 years, this paper is the first attempt internationally to rigorously and empirically conduct a risk assessment and compensation analysis involved with proceeding to court for compulsory land acquisition cases. Given the significance of the compulsory land acquisition process, this empirically validated research enables a more informed and critical understanding of the risk factors and compensation outcomes attached to the compulsory land acquisition court case judgment process.

Details

Journal of Property Investment & Finance, vol. 29 no. 2
Type: Research Article
ISSN: 1463-578X

Keywords

Article
Publication date: 1 May 1996

Shunichi Maekawa

In the past, the profit from property investments was always higher than that from other assets, because of the expectation of high rates of increase in land prices. However, as…

1228

Abstract

In the past, the profit from property investments was always higher than that from other assets, because of the expectation of high rates of increase in land prices. However, as Japan′s economic growth has been slowing down, these circumstances for property investments have changed. The income yield rate of commercial property investments in Tokyo decreased sharply from 1982 to 1987 because of the sharp increase in land prices. Though commercial land prices in Tokyo have decreased since 1992, the income yield rate is too low because of decrease of office rents. If the income yield rate does not increase, demand for commercial property investments will not recover because a high rate of increase in land prices cannot be expected in the future.

Details

Journal of Property Valuation and Investment, vol. 14 no. 2
Type: Research Article
ISSN: 0960-2712

Keywords

Article
Publication date: 1 November 1998

Ernest Raiklin

This paper attempts to analyze the mechanism of land rent distribution under the Soviet and post‐Soviet conditions. The subject is examined from a purely theoretical point of…

279

Abstract

This paper attempts to analyze the mechanism of land rent distribution under the Soviet and post‐Soviet conditions. The subject is examined from a purely theoretical point of view. The procedure is as follows: first, the socioeconomic meaning of the word “Soviet” is defined. Second, the difference between land rent production and land rent distribution is examined. Finally, Soviet land rent distribution is investigated. Also, changes which the collapse of the Soviet system brought to the process of land rent distribution during the post‐Soviet period are examined. Within this framework, the role of Soviet turnover taxes versus post‐Soviet value‐added taxes is discussed.

Details

International Journal of Social Economics, vol. 25 no. 10
Type: Research Article
ISSN: 0306-8293

Keywords

Article
Publication date: 31 July 2009

Pamela Guiling, Damona Doye and B. Wade Brorsen

This paper aims to determine the effects of agricultural, recreational and urban variables on Oklahoma land prices.

3022

Abstract

Purpose

This paper aims to determine the effects of agricultural, recreational and urban variables on Oklahoma land prices.

Design/methodology/approach

An econometric model is estimated using price of agricultural land parcels as the dependent variable and independent variables representing agricultural, recreational and urban uses. Recreational variables include county‐level recreational income from Agricultural Census data as well as deer harvest for each county. Urban variables are functions of population and income for each county. The agricultural variables include rainfall as well as crop returns for cropland and cattle prices for pasture.

Findings

Agricultural variables are the most important, followed by urban and then recreational variables. Transaction prices are higher than commonly used land‐value survey data. The major recreational variable is deer harvest, which is more important in small tracts. The value of pasture is now greater than cropland. Small tract sizes receive substantial premiums.

Research limitations/implications

Agriculture is still an important part of the Oklahoma economy, so the findings might differ in more densely populated states. As with most econometric models, there are possible biases due to errors in measurement or missing explanatory variables.

Practical implications

The paper provides information that could be used by those wanting to estimate land value or wanting to manage land to increase its value.

Originality/value

The paper differs from previous work in both variables considered and the data used. Also, most previous work has not as directly addressed the issue of the relative importance of agricultural, recreational and urban variables.

Details

Agricultural Finance Review, vol. 69 no. 2
Type: Research Article
ISSN: 0002-1466

Keywords

1 – 10 of over 49000