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1 – 10 of 112
Article
Publication date: 1 August 2004

D.Z. Seker, A. Tanik, M. Gurel, A. Ekdal, A. Erturk, S. Kabdasli and A. Aydingakko

This paper presents part of the results of ongoing integrated and interdisciplinary studies conducted at a vulnerable coastal lagoon system with the aim of protecting it…

Abstract

This paper presents part of the results of ongoing integrated and interdisciplinary studies conducted at a vulnerable coastal lagoon system with the aim of protecting it from further anthropogenic pollution. The target area is in southwestern Turkey, consisting of a lake that joins the Mediterranean Sea via a lagoon channel system. Land resources in the watershed are identified, including all the elements of the physical environment that influence potential land‐use, and are illustrated by the application of geographical information systems through mapping and visualization of various thematic layers of land. This study will enlighten those working on lagoon watersheds aiming at conservation of natural resources since it states the results of the studies conducted so far through various disciplines, and presents how data are utilized by the groups in an integrated manner. Based on the available data, pre‐modelling studies on hydrodynamic modelling and on water quality modelling are also referred. Identification of a watershed depends on gathering satisfactory data, which will further be used to establish sustainable development and management plans, apart from utilizing the obtained data for watershed and hydrodynamic modelling approaches and to better understand such complex systems.

Details

Management of Environmental Quality: An International Journal, vol. 15 no. 4
Type: Research Article
ISSN: 1477-7835

Keywords

Article
Publication date: 2 October 2007

Serafeim Polyzos and Dionissios Minetos

Non‐marketable natural coastal resources such as beaches, sand‐dune systems and cliff sides have an economic value deriving not least from the various services which they…

1305

Abstract

Purpose

Non‐marketable natural coastal resources such as beaches, sand‐dune systems and cliff sides have an economic value deriving not least from the various services which they provide as well as the human demand for consuming some of these services. Coastal defence projects designed to protect the coast against erosion and flooding by the sea have often caused irreversible degradation to coastal natural resources. The main aim of this article is to investigate whether the joint use of cost‐benefit analysis and environmental resource valuation techniques can give any insights toward the sustainable use of the coast. Design/methodology/approach – This paper employs cost‐benefit analysis (CBA) in order to assess the justifiability of carrying out coast protection works in a particular location. This paper also uses contingent valuation methodology (CVM) to estimate the economic values of non‐marketable coastal environmental services. In particular, this paper employs willingness to pay (WTP) technique and try to elicit satisfaction values from beach users by conducting an on‐site questionnaire survey. Findings – his paper argues that there are many advantages in approaching shoreline protection project appraisal both from an environmental as well as an economics point of view. However, when conducting a cost‐benefit analysis the monetary value of environment elicited by contingent valuation techniques has very limited use in it self. It can set the financial budget within which likely coast protection options should be considered but it cannot determine which option is more sustainable. What the decision‐maker needs is to give real meaning to this value by translating it into people's specific preferences and behavioural characteristics. The next step should be setting out pragmatic project characteristics to accommodate the above preferences. Practical implications – Knowledge‐based planning and scheduling as well as informed coastal protection decisions is central to achieving sustainability in the coastal zone. Prior to managing a coastal area, the baseline information needed is the economic value of services that the coastal location in question provides. Originality/value – Generally speaking, the economic value of non‐marketable natural coastal resources such as beaches is closely associated with the way in which society perceives the environment. Both use and non‐use values that are placed upon the environment by individuals have an anthropocentric basis. In this respect, it could be argued that these values often reflect multiple coastal zone uses, conflicts of human interests, levels of environmental education, environmental awareness and environmental appreciation.

Details

Management of Environmental Quality: An International Journal, vol. 18 no. 6
Type: Research Article
ISSN: 1477-7835

Keywords

Article
Publication date: 5 January 2010

Meng‐Lung Lin and Cheng‐Wu Chen

The purpose of this paper is to better understand landscape dynamics in arid and semi‐arid environments. Land degradation has recently become an important issue for land…

1303

Abstract

Purpose

The purpose of this paper is to better understand landscape dynamics in arid and semi‐arid environments. Land degradation has recently become an important issue for land management in western China. The oasis ecosystem is especially sensitive to environmental disturbances, such as abnormal/extreme precipitation events, variations in the water supply from the upper watersheds, fluctuations in temperature, etc. Satellite remote sensing of terrestrial ecosystems can provide us with the temporal dynamics and spatial distributions of green cover over large areas of landscape. Seasonal green cover data are especially important in assessing landscape health (e.g. desertification, rate of urban sprawl, natural disturbances) in arid and semi‐arid regions. In this study, green cover data are derived from vegetation indices retrieved from moderate resolution imaging spectroradiometer (MODIS) sensors onboard the satellite Terra.

Design/methodology/approach

Satellite images recorded during the period from April 2000 to December 2005 are analyzed and the spatial distribution and temporal changes of the Ejin Oasis quantified.

Findings

This study shows that it is possible to derive important parameters linked to landscape sensitivity from MODIS and the derived imagery, such as normalized difference vegetation index (NDVI) time‐series data. Such a MODIS‐based time‐series monitoring system is particularly useful in arid and semi‐arid environments. The results of landscape sensitivity analysis prove the effectiveness of the method in assessing landscape sensitivity from the years 2001‐2005.

Practical implications

The novel strategy used in this investigation is based on the T‐S fuzzy model, which is in turn based on fuzzy theory and fuzzy operations.

Originality/value

Simulation results based on fuzzy models will help to improve the monitoring techniques used to evaluate land degradation and to estimate the newest tendency in landscape green cover dynamics in the Ejin Oasis.

Details

Engineering Computations, vol. 27 no. 1
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 9 October 2009

Meng‐Lung Lin, Cheng‐Wu Chen, Qiu‐Bing Wang, Yu Cao, Jyh‐Yi Shih, Yung‐Tan Lee, Chen‐Yuan Chen and Shin Wang

The growing rate of desertification in Northwestern China and Mongolia that is occurring as a result of the conflict between economic development and natural conservation…

Abstract

Purpose

The growing rate of desertification in Northwestern China and Mongolia that is occurring as a result of the conflict between economic development and natural conservation has been demonstrated in many studies. There have, for example, been some large studies using variations in bi‐weekly normalized difference vegetation index (NDVI) satellite images as a parameter for evaluating the vegetation dynamics in these areas. The purpose of this paper is to identify multi‐temporal variation in vegetated and non‐vegetated areas in remotely sensed satellite images to assess the status of desertification in East Asia.

Design/methodology/approach

Spatial data derived from these satellite images are applied to evaluate vegetation dynamics on a regional level, to identify the areas most vulnerable to desertification.

Findings

Analytical results indicate that the desert areas in East Asia are primarily distributed over Southern Mongolia, Central and Western Inner Mongolia, and Western China (the Taklimakan Desert). These desert areas expanded from 2000 to 2002, shrunk in 2003, then expanded again from 2003 to 2005. The areas most at risk for desertification are principally distributed in Southeastern Mongolia, and Eastern Inner Mongolia.

Originality/value

Simulation results based on data for deserts distributed throughout Northwestern China and Mongolia indicate that the proposed fuzzy model‐based method would be helpful for assessing and monitoring desertification. These analytical results will help administrators refine planning processes, define the boundaries of protected areas, and facilitate decisions for prioritizing areas for desertification protection.

Details

Engineering Computations, vol. 26 no. 7
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 4 January 2008

Chung‐Hung Tsai, Cheng‐Wu Chen, Wei‐Ling Chiang and Meng‐Lung Lin

Fuzzy theory provides a rigorous, flexible approach to the problem of defining and computing. Therefore, to facilitate decision making in a geographic information system…

1332

Abstract

Purpose

Fuzzy theory provides a rigorous, flexible approach to the problem of defining and computing. Therefore, to facilitate decision making in a geographic information system (GIS), the graph layer indicator and the Takagi‐Sugeno (T‐S) fuzzy model must be integrated. This study aims to explain several versions of the T‐S fuzzy model based on fuzzy theory and fuzzy operation.

Design/methodology/approach

An inference model is constructed for GIS using the T‐S fuzzy model to formulate an integrated T‐S decision‐making (TSDMK) system.

Findings

The TSDMK system accommodates inexact, linguistic, vague and uncertain GIS data. The operator assigns most graph layer indicators by intuition.

Practical implications

Simulation results for the Hualien main station show that the proposed TSDMK system is an effective approach for GIS decision making.

Originality/value

This investigation assesses applications of fuzzy logic for decision making in a GIS based on TSDMK graphs focusing on model‐based systems.

Details

Engineering Computations, vol. 25 no. 1
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 22 March 2013

Cihan Altuntas

The relative orientation (RO) is an important step on photogrammetric processes of stereoscopic images. The relationship between the stereoscopic images is constructed by…

Abstract

Purpose

The relative orientation (RO) is an important step on photogrammetric processes of stereoscopic images. The relationship between the stereoscopic images is constructed by tie (conjugate) points. Many automatic tie point selection methods have been introduced by photogrammetry community so far. The scale invariant feature transform (SIFT) and speeded‐up robust features (SURF) are frequently used for automatic tie point selection from stereoscopic images. However, any research has been performed related to RO errors (y‐parallaxes) on SIFT and SURF extracted tie points. The purpose of this paper is to compute errors on tie points and investigate their distributions on the model area in terms of size.

Design/methodology/approach

The experimental studies were performed on an historical building as it enables more tie points for investigation. While a couple of the stereoscopic images include rich details, the other has poor details. The image orientation and tie point selection accuracy were evaluated by root mean square and y‐parallaxes, respectively. The relationship between y‐parallaxes of tie points and their distances from centre of the images were investigated.

Findings

SIFT and SURF have a large number of tie points according to manual method. The y‐parallaxes on tie points have uniform distribution for two methods. There are relations between the precision of the SIFT and SURF keypoints and their distances from the centre of the image. Moreover, the accuracy of the RO and size of the y‐parallaxes on tie points depend on matching accuracy of the keypoints. Furthermore, although there are a few tie points that have large y‐parallax especially by the SURF, RO could be performed with high accuracy thanks to numerous tie points.

Originality/value

Stereoscopic images of close‐range photogrammetry have different scale and rotations, unlike aerial photogrammetry. Manual selection of tie points is time consuming and tedious. Furthermore, if the measurement surface has no implicit entities, enough tie points from the images cannot be selected by manually. However, tie point selection can be performed by SIFT and SURF automatically, even if there are scale, noise and rotation between the images.

Article
Publication date: 12 August 2021

Rijwan Khan, Mohammad Shabaz, Sarfaraj Hussain, Faraz Ahmad and Pranav Mishra

The impact of natural disasters on human life, the environment and the flora and fauna can be contained to large extent by intelligent human intervention. This study…

104

Abstract

Purpose

The impact of natural disasters on human life, the environment and the flora and fauna can be contained to large extent by intelligent human intervention. This study introduces the human capabilities which can be extended considerably with technology. Internet of things have always provided opportunities for predicting and managing manmade/natural disasters. The extreme reason for causing soil erosions, landslides, cloud bursts, floods, etc., are due to excessive rainfall. However, the flood is one of the most happening natural disasters, following Bihar to be the most affected region due to floods. Lots of lives and properties were lost and damaged.

Design/methodology/approach

This implemented researchers to introduce an advanced solution for such calamities. Expectations were developed that it would signalize authority as early as possible so that advanced measures are taken before the effect. The lack of sensing or alarming technology in India pushed researchers to develop a model using the Android app that basically detected the upcoming flood and other calamities.

Findings

Most importantly the entire model was programmed with IoT and its techniques so that the response is quicker and more accurate.

Originality/value

This research study is original.

Details

World Journal of Engineering, vol. 19 no. 2
Type: Research Article
ISSN: 1708-5284

Keywords

Open Access
Article
Publication date: 19 August 2021

Carlo Vermiglio, Guido Noto, Manuel Pedro Rodríguez Bolívar and Vincenzo Zarone

This paper aims to analyse how emerging technologies (ETs) impact on improving performance in disaster management (DM) processes and, concretely, their impact on the…

2051

Abstract

Purpose

This paper aims to analyse how emerging technologies (ETs) impact on improving performance in disaster management (DM) processes and, concretely, their impact on the performance according to the different phases of the DM cycle (preparedness, response, recovery and mitigation).

Design/methodology/approach

The methodology is based on a systematic review of the literature. Scopus, ProQuest, EBSCO and Web of Science were used as data sources, and an initial sample of 373 scientific articles was collected. After abstracts and full texts were read and refinements to the search were made, a final corpus of 69 publications was analysed using VOSviewer software for text mining and cluster visualisation.

Findings

The results highlight how ETs foster the preparedness and resilience of specific systems when dealing with different phases of the DM cycle. Simulation and disaster risk reduction are the fields of major relevance in the application of ETs to DM.

Originality/value

This paper contributes to the literature by adding the lenses of performance measurement, management and accountability in analysing the impact of ETs on DM. It thus represents a starting point for scholars to develop future research on a rapidly and continuously developing topic.

Details

Meditari Accountancy Research, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2049-372X

Keywords

Article
Publication date: 10 March 2020

Abdul Kadir Othman, Muhammad Iskandar Hamzah and Lailatul Faizah Abu Hassan

Based on the E-Service Quality (E-SQ) model, this study investigates the effects of self-service technology (SST) quality attributes, specifically automated teller…

Abstract

Purpose

Based on the E-Service Quality (E-SQ) model, this study investigates the effects of self-service technology (SST) quality attributes, specifically automated teller machines (ATMs), on customer satisfaction. The interaction effects of technological optimism on the abovementioned link are also examined. SST usage is conceptualized as a multidimensional construct that consists of five dimensions (reliability, security, convenience, functionality and responsiveness).

Design/methodology/approach

The data were collected through a survey of a sample of Malaysian participants who used cash-recycling ATMs. The proposed theoretical model was tested using partial least squares (PLS) structural equation modeling (SEM).

Findings

The results suggest that reliability, convenience, and functionality are critical factors that affect customer satisfaction in using ATMs. Technological optimism was found to weaken the relationship between reliability and customer satisfaction.

Practical implications

Considering the relative novelty of cash-recycling ATMs in the market, banks should ensure a smooth, error-free and accessible functioning of the system. Special attention has to be given to tech-savvy consumers whose higher level of optimism, with an increase of perceptions of reliability, may suppress their heighten sense of fulfillment. This customer group could be offered interactive digital engagement through mobile applications and social networking channels.

Originality/value

The E-SQ model is a helpful tool to understand the reasons underlying user satisfaction with cash-recycling ATMs. The results also contribute to the theoretical development of the E-SQ model through the integration of technological optimism as a contingent factor.

Details

Journal of Enterprise Information Management, vol. 33 no. 3
Type: Research Article
ISSN: 1741-0398

Keywords

Article
Publication date: 22 June 2010

Marianna Sigala

The paper first aims to analyse the role and functionality of geocollaborative portals in assisting collaborative trip planning processes and then it seeks to develop and…

3034

Abstract

Purpose

The paper first aims to analyse the role and functionality of geocollaborative portals in assisting collaborative trip planning processes and then it seeks to develop and test a model for measuring the multi‐dimensionality of customer value perceived by system users.

Design/methodology/approach

Primary data are collected from students assigned to use Yahoo! Trip Planner for collaboratively designing an hypothetical trip. A two step approach of an exploratory factor analysis and confirmatory factor analysis was used for testing the model measuring the types of customer value derived from the system use.

Findings

Findings provide evidence of the existence of both “give” (risk, time and effort to use the system) and “get” (functional, social and emotional) customer values.

Research limitations/implications

Findings are limited to the demographics of the students' sample, while future research should also try to replicate the study in other contexts (e.g. cultures, type of trips and destinations).

Practical implications

The findings provide useful information about the value dimensions that can affect customer behaviour in using and preferring a particular geocollaborative portal, which in turn give useful guidance on how to design and develop the functionality and services of such systems.

Originality/value

The paper contributes to the fields related to the role of geocollaborative portals in supporting collaborative decision processes and the types of customer value deriving from and motivating technology use. The paper also contributes to the field related to user toolkits developed to assist customers in designing and customising products/services.

Details

Marketing Intelligence & Planning, vol. 28 no. 4
Type: Research Article
ISSN: 0263-4503

Keywords

1 – 10 of 112