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Article
Publication date: 2 March 2021

Md. Jewel Rana, Md. Rakibul Hasan and Md. Habibur Rahman Sobuz

Application of appropriate shading device strategies in buildings can reduce direct solar heat gain through windows as well as optimize cooling and artificial lighting…

Abstract

Purpose

Application of appropriate shading device strategies in buildings can reduce direct solar heat gain through windows as well as optimize cooling and artificial lighting load. This study investigates the impact of common shading devices such as overhangs, fins, horizontal blinds, vertical blinds and drapes on energy consumption of an office building and suggests energy efficient shading device strategies in the contexts of unique Bangladeshi subtropical monsoon climate.

Design/methodology/approach

This research was performed through the energy simulation perspective of a prototype office building using a validated building energy simulation tool eQUEST. Around 100 simulation patterns were created considering various types of shading devices and building orientations. The simulation results were analysed comprehensively to find out energy-efficient shading device strategies.

Findings

Optimum overhang and fin height is equal to half of the window height in the context of the subtropical climate of Bangladesh. South and West are the most vulnerable orientations, and application of shading devices on these two orientations shows the highest reduction of cooling load and the lowest increment of lighting load. An existing building was able to save approximately 7.05% annual energy consumption by applying the shading device strategies that were suggested by this study.

Originality/value

The shading device strategies of this study can be incorporated into the Bangladesh National Building Code (BNBC) as new energy-efficient building design strategies because the BNBC does not have any codes or regulations regarding energy-efficient shading device. It can also be used as energy-efficient shading device strategies to other Southeast Asian countries with similar climatic contexts of Bangladesh.

Details

Smart and Sustainable Built Environment, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2046-6099

Keywords

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Article
Publication date: 26 July 2021

Md. Ikramul Hoque, Md. Abu Safayet, Md. Jewel Rana, Abu Yousuf Bhuiyan and Golam Sadmani Quraishy

Construction delay is the most common issue and creates many adverse effects in any construction industry. This study has investigated the views of engineers, project…

Abstract

Purpose

Construction delay is the most common issue and creates many adverse effects in any construction industry. This study has investigated the views of engineers, project managers and contractors on the causes of delay during a construction phase to identify potential delay factors, negative effects on project delivery and prioritize the delay factors.

Design/methodology/approach

An extensive literature review and interview with construction stakeholders have been conducted to identify potential causes of construction delays and design a questionnaire survey. The final questionnaire was designed with 40 potential delay factors, and a total of 102 valid Bangladeshi construction stakeholders responded to it. The result was analyzed by the relative importance index.

Findings

Among the 40 delay factors, the top five most influencing delay factors are “delay in progress payments,” “rework due to mistakes during construction,” “lack of skilled labor,” “poor monitoring and control of activities” and “delays in the making of a decision.” The top five most damaging effects of delay are “time overrun,” “cost overrun,” “disputes,” “arbitration” and “litigation,” among ten negative effects of construction delay. All construction stakeholders believe that the owner-related, consultant-related and contractor-related groups are the first, second and third most important groups of delay factors.

Originality/value

The outcome of this study would enable the Bangladeshi construction industry to develop strategies to overcome delay factors and their harmful effects. By focusing on the outcome of this research and prioritizing the critical factors, the construction industry of Bangladesh will be able to minimize construction delay significantly and propagate the progress of the construction industry by delivering quality projects timely.

Details

International Journal of Building Pathology and Adaptation, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2398-4708

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Article
Publication date: 11 November 2020

Md. Jewel Rana, Md. Rakibul Hasan, Md. Habibur Rahman Sobuz and Norsuzailina Mohamed Sutan

This study investigates the impact and economic viability of energy-efficient building envelope and orientation for contributing net zero energy building (NZEB) and…

Abstract

Purpose

This study investigates the impact and economic viability of energy-efficient building envelope and orientation for contributing net zero energy building (NZEB) and suggests optimum thermal insulation thickness, optimum wall thickness, appropriate orientation and glazing types of window in the contexts of unique Bangladeshi subtropical monsoon climate.

Design/methodology/approach

The whole study was conducted through energy simulation perspective of an existing office building using building information modeling (BIM) and building energy modeling (BEM) tools which are Autodesk Revit 2017, Autodesk Green Building Studio (GBS) and eQUEST. Numerous simulation patterns were created for energy simulation considering building envelope parameters and orientations. A comprehensive data analysis of simulation results was conducted to sort out efficient passive design strategies.

Findings

The optimum thermal mass and thermal insulation thickness are 6.5 and 0.5 inches, respectively, considering energy performance and economic viability. This study highly recommends that a building should be designed with a small window-to-wall ratio in the south and west face. The window should be constructed with double glazing Low-E materials to reduce solar heat gain. The studied building saves 9.14% annual energy consumption by incorporating the suggested passive design strategies of this study.

Originality/value

The output of this work can add some new energy-efficient design strategies to Bangladesh National Building Code (BNBC) because BNBC has not suggested any codes or regulations regarding energy-efficient passive design strategies. It will also be useful to designers of Bangladesh and other countries with similar subtropical climatic contexts which are located in Southeast Asia and Northern Hemisphere of Earth.

Details

International Journal of Building Pathology and Adaptation, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2398-4708

Keywords

Content available
Article
Publication date: 21 February 2020

Costanza Nosi, Lamberto Zollo, Riccardo Rialti and Cristiano Ciappei

Using an enhanced version of the theory of reasoned action (TRA), this study investigates the antecedents of organic quinoa-based food buying intention. In addition to…

Abstract

Purpose

Using an enhanced version of the theory of reasoned action (TRA), this study investigates the antecedents of organic quinoa-based food buying intention. In addition to attitude toward this behavioral intention, the proposed model examines the influence that ecological welfare, political values, and consumer-perceived corporate social responsibility (CSR) of the point of sale exert on consumer willingness to purchase organic quinoa-based food.

Design/methodology/approach

Structural equation modeling (SEM) was used to analyze the data collected through an intercept survey conducted at specialized organic stores on a convenience sample of 158 individuals in Italy.

Findings

Although ecological welfare and a retailer's CSR image positively influence consumer attitude toward buying organic quinoa-based food, political values negatively affect this attitude. Furthermore, consumer attitude is found to be a crucial predictor of behavioral intention.

Research implications

At the theoretical level, the results are useful for demonstrating that other variables, in addition to those used in the traditional TRA, can further explain consumers' organic food buying intention. Additionally, the findings might be useful for both quinoa producers and retailers in creating and executing their marketing and communication strategies.

Originality/value

In addition to contributing to the stream of literature that investigates possible variables that might increase the predictive power of the TRA, this study sheds some light on organic food purchasing consumer behavior.

Details

British Food Journal, vol. 122 no. 3
Type: Research Article
ISSN: 0007-070X

Keywords

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Article
Publication date: 18 August 2020

Jérôme Lacoeuilhe, Didier Louis, Cindy Lombart and Blandine Labbé-Pinlon

The research aim is to investigate the impacts of comparative ads used by retailers to compare the prices of their store brand (SB) products with those of equivalent…

Abstract

Purpose

The research aim is to investigate the impacts of comparative ads used by retailers to compare the prices of their store brand (SB) products with those of equivalent national brand (NB) products. More specifically, this research examines if consumers perceive retailers as legitimate when they use comparative ads to compare the prices of their SB products to those of equivalent NB products, and how effective are these comparative ads in terms of actual purchases. This research also explores for which SB type (economy, standard or premium) and consumers are comparative ads most effective.

Design/methodology/approach

This research investigates consumers' reactions to comparative ads used by retailers to compare the prices of their SB products with those of similar NB products through an experiment within a store laboratory. A between-subject design has been used. The participants of the first/second/third group (n1 = 93/n2 = 92/n3 = 91) were exposed to ads comparing the prices of retailer's economy/standard/premium SB food products with their equivalent NB food products, in the same product category. The participants of each group carried out a shopping trip in the store laboratory.

Findings

Consumers consider retailers legitimate when they use comparative ads. This favourable evaluation improves their attitude towards these ads. However, the impact of retailers' legitimacy of (1) means, (2) objectives and (3) historical legitimacy on consumers' attitude towards comparative ads depends on the SB type (economy, standard and premium). By contrast, comparative ads are effective in terms of consumers' attitude towards these ads and towards SBs, along with purchase intention and actual purchases of these brands, whatever the SB type. Lastly, this research highlights that comparative ads for SBs are mainly directed at consumers with high levels of price consciousness and resistance to NBs.

Research limitations/implications

This research only tested the impact of direct comparative advertising and an extrinsic attribute (price). The research experiment was conducted on a convenience sample, which limits its external validity.

Practical implications

This research encourages retailers to use comparative advertising for their SBs (economy, standard and premium) for several reasons. First, this study suggests that comparative advertising is an effective tool for retailers to shape or improve consumers' attitude towards SBs, via their attitude towards comparative ads. Second, this research proposes that comparative advertising contrasting the prices of SB products with those of NB products could increase retailers' in-store sales of their SBs. Lastly, this research underlines that comparative advertising is particularly effective for consumers with high levels of price consciousness and resistance to NBs.

Originality/value

This research supplements previous research in the field of SBs and comparative advertising. Previous research on comparative advertising has examined NBs exclusively (Dianoux et al., 2013; Beard, 2018). Comparisons between SBs and NBs are lacking. This research thus validates the use of this specific form of communication for SBs, given the paucity of studies of the effects of the use of mass media communication on SBs (Nenycz-Thiel and Romaniuk, 2014; Gendel-Guterman and Levy, 2017).

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