Search results

This paper aims to explore the process of implementing solar photovoltaic (PV) systems in construction to contribute to the understanding of systemic innovation in construction.

The exploratory research presented is based on qualitative data collected in workshops and interviews with 76 construction- and solar-industry actors experienced in solar PV projects. Actor-specific barriers were identified and analysed using an abductive approach.

In light of established definitions of systemic innovation, the process of implementing solar PV systems in construction involves challenges regarding technical and material issues, competencies, and informal and formal institutions. The specificities of this case highlight the necessity of paying attention to details in the process and to develop knowledge of systemic innovation in construction since the industry’s involvement in addressing societal challenges related to the energy transition will require implementing such innovations much more in the future.

New knowledge of solar PV systems as an innovation in professional construction is collected, enabling the adaptation of management strategies for its implementation. This knowledge can also be applied generally to other challenges encountered in highly systemic innovation implementation. Solar industry actors can gain an understanding of solar-specific challenges for the construction industry, challenges for which they must adapt their activities.

The exploration of actor-specific experiences of solar PV projects has resulted in a novel understanding of this specific innovation and its implementation. The findings illustrate a case of a high level of systemic innovation and the need to use a finer-grained scale for classification when studying innovation in construction.

This study aims to improve a construction company's overall project delivery by utilising lean six sigma (LSS) methods combined with building information modelling (BIM) to design, modularise and manufacture various building elements in a controlled factory environment off-site.

A case study in a construction company utilised lean six sigma (LSS) methodology and BIM to identify non-value add waste in the construction process and improve sustainability.

An Irish-based construction company manufacturing modular pipe racks for the pharmaceutical industry utilised LSS to optimise and standardise their off-site manufacturing (OSM) partners process and leverage BIM to design skids which could be manufactured offsite and transported easily with minimal on-site installation and rework required. Productivity was improved, waste was reduced, less energy was consumed, defects were reduced and the project schedule for completion was reduced.

The case study was carried out on one construction company and one construction product type. Further case studies would ensure more generalisability. However, the implementation was tested on a modular construction company, and the methods used indicate that the generic framework could be applied and customized to any offsite company.

This is one of the few studies on implementing offsite manufacturing (OSM) utilising LSS and BIM in an Irish construction company. The detailed quantitative benefits and cost savings calculations presented as well as the use of the LSM methods and BIM in designing an OSM process can be leveraged by other construction organisations to understand the benefits of OSM. This study can help demonstrate how LSS and BIM can aid the construction industry to be more environmentally friendly.

This paper aims to shed light on the spatial constraints of sex work in Greece. The objective is twofold: to illustrate the intertemporal stance of the Greek state to push sex work at the edge of both the city and the law produces sex workers as always already marginal subjects and to identify how a spatial-based understanding of sex work could help in acknowledging sex workers’ full community citizenship.

This article examines the legal geographies of sex work in modern and contemporary Greece. The author is a doctoral student in critical jurisprudence with a professional background in urban planning law, who also works voluntarily with Athens-based sex worker’s organizations. Law’s materialization within space (Bennet and Layard, 2015, p. 406), namely, the implication of law in the discursive and material production of place, is examined through archival research with primary and secondary sources, including legislations and LGBT publications such as Amfi and Kráximo from the 1980s and 1990s found in the Archives of Contemporary Social History (ASKI) in Athens. Additionally, as the author is currently conducting fieldwork with people who are working or have worked in the past in sex in Greece as a part of her PhD dissertation, the paper contains data provided by ten interlocutors to highlight their own personal experience. The researcher has used the critical oral history method, as it is committed to recording first-hand knowledge of experiences of marginalized community members who are often unheard or untold, with the additional goals of contextualizing these stories to reveal power differences and inequities (Lemley, 2017, Rickard, 2003).

The paper provides insight into how regulationism establishes the brothel – a metonymy of prostitution – as a heterotopia within the urban space. Contemporary approaches, such as LULUs and broken window policies, are used to indicate the historically marginal placement of sex work.

The interviews presented here were conducted in the summer of 2022, in the context of the author’s PhD research. Despite her six years of activist-level involvement with sex workers’ rights organizations, due to ethical constraints, only the findings of interviews conducted up to the writing of this paper are presented here, while details of private discussions with members of these organizations are omitted.

The paper examines a significant and timely matter of place making and spatial justice. Unlike earlier research on prostitution in Greece that focused on the brothel either as a heterotopia or as an undesirable land use, the novelty of this paper is that it highlights the intersections between policing, planning, public hygiene, anti-immigration policies around the regulation of the sex market. By critically discussing the implications of the de facto illegality of sex work in Greece, the study highlights the importance of including the voices of sex workers in decision-making and contributes to the debate around the decriminalization of sex work in Greece.

Prefabricated products are continually entering the building construction market; yet, the decision to use prefabricated products in a construction project is based mostly on personal preferences and the evaluation of direct costs. Researchers and practitioners have debated appropriate measurement systems for evaluating the impacts of prefabricated products and for comparing them with conventional on-site construction practices. The more advanced, cost–benefit approach to evaluating prefabricated products often inspires controversy because it may generate inaccurate results when converting non-monetary effects into costs. As prefabrication may affect multiple organisations and product subsystems, the method used to decide on production methods should consider multiple direct and indirect impacts, including nonmonetary ones. Thus, this study aims to develop a multi-criteria method to evaluate both the monetary and non-monetary impacts of prefabrication solutions to facilitate decision-making on whether to use prefabricated products.

Drawing upon a literature review, this research suggests a multi-criteria method that combines the choosing-by-advantage approach with a cost–benefit analysis. The method was presented for validation in focus group discussions and tested in a case involving a prefabricated bathroom.

The analysis indicates that the method helps a project’s stakeholders communicate about the relative merits of prefabrication and conventional construction while facilitating the final decision of whether to use prefabrication.

This research contributes a method of evaluating the monetary and non-monetary impacts of prefabricated products. The research underlines the need to evaluate the diverse benefits and sacrifices that stakeholder face when considering production methods in construction.

Although the challenges associated with big data are increasing, the question of the most suitable big data analytics (BDA) platform in libraries is always significant. The purpose of this study is to propose a solution to this problem.

The current study identifies relevant literature and provides a review of big data adoption in libraries. It also presents a step-by-step guide for the development of a BDA platform using the Apache Hadoop Ecosystem. To test the system, an analysis of library big data using Apache Pig, which is a tool from the Apache Hadoop Ecosystem, was performed. It establishes the effectiveness of Apache Hadoop Ecosystem as a powerful BDA solution in libraries.

It can be inferred from the literature that libraries and librarians have not taken the possibility of big data services in libraries very seriously. Also, the literature suggests that there is no significant effort made to establish any BDA architecture in libraries. This study establishes the Apache Hadoop Ecosystem as a possible solution for delivering BDA services in libraries.

The present work suggests adapting the idea of providing various big data services in a library by developing a BDA platform, for instance, providing assistance to the researchers in understanding the big data, cleaning and curation of big data by skilled and experienced data managers and providing the infrastructural support to store, process, manage, analyze and visualize the big data.

The study concludes that Apache Hadoops’ Hadoop Distributed File System and MapReduce components significantly reduce the complexities of big data storage and processing, respectively, and Apache Pig, using Pig Latin scripting language, is very efficient in processing big data and responding to queries with a quick response time.

According to the study, there are significantly fewer efforts made to analyze big data from libraries. Furthermore, it has been discovered that acceptance of the Apache Hadoop Ecosystem as a solution to big data problems in libraries are not widely discussed in the literature, although Apache Hadoop is regarded as one of the best frameworks for big data handling.

Sustainable development goals (SDGs) designed by the United Nations include ‘universal and equitable access to affordable, reliable and clean energy’ as one of the pathways to achieve a better and more sustainable future by 2030. Universal access to electricity, clean cooking fuel, increasing share of renewable resources and improving energy efficiency are the key components of SDG7. In India, the government has undertaken targeted programmes to ensure full electrification of households and greater use of liquid petroleum gas (LPG) for clean cooking replacing traditional solid biomass fuels in poor households. Installed capacity targets are set to raise the share of renewable resources in total energy mix along with the policies undertaken to make it cost-competitive (SDG India, 2019–2020). However, the economic crisis experienced by India during COVID-19 pandemic is likely to affect this ongoing drive towards clean energy use. Sudden fall in income and loss of employment particularly in the unorganised sector might have made the poor rural households vulnerable to reversion to their traditional cooking fuels. The renewable sector has also faced uncertainties due to halted construction works and disrupted global supply chains during lockdown. The present chapter discusses these pertinent issues crucial for achieving SDGs. It investigates how far the COVID-19-driven economic crisis has delayed India's clean cooking fuel programme for different states. It further examines the impact of COVID-19 lockdown on renewable energy sector, particularly on the solar energy sector. The study suggests some policy measures for a robust recovery, ensuring transition towards clean energy use and sustainable growth to protect the environment.

This study explores the relations between home and family in times of a pandemic, transporting the family away from the family home and, apparently, from the family itself. Specifically, it focuses art, culture, and society by shedding light on the enduring role of family rituals in creating and sustaining family identity while affirming the role of information and communication technology (ICT), in both the construction and reproduction of the family dynamics amid pandemic times. Reflection is taken upon a live-by-Zoom art exhibition opening. Family photo albums and several artifacts are used to show the family history, and, at the same time, the installed objects and surrounding narratives invite others to imagine the artist’s family as well as each audience member’s own family. The opening took place in March 2021, during the second lockdown in Portugal. Methodologically, the chapter draws on data collected through direct observation and autoethnography. Inspired by an arts-based approach, narrative is built on storytelling sociology, while using writing as a method of inquiry and reflexive composition to overcome the limits of the personal narrative. By the end, it is argued that as families “live” at Zoom, family rituals too. Zoom platform reproduces the family atmosphere, opportunities, and constraints. Looking at the art exhibit opening as a family ritual allows one to think about how individuals experienced family gatherings during the pandemic, but also how art might generate such familial intimacies in such exceptional times.

Industry 4.0 is exacerbating the need for offsite construction (OSC) adoption, and this rapid transformation is pushing the boundaries of construction skills towards extensive modernisation. The adoption of this modern production strategy by the construction industry would redefine the position of OSC. This study aims to examine whether the existing skills are capable of satisfying the needs of different OSC types.

A critical literature review evaluated the impact of transformative technology on OSC skills. An existing industry standard OSC skill classification was used as the basis to develop a master list that recognises emerging and diminishing OSC skills. The master list recognises 67 OSC skills under six skill categories: managers, professionals, technicians and trade workers, clerical and administrative workers, machinery operators and drivers and labourers. The skills data was extracted from a series of 13 case studies using document reviews and semi-structured interviews with project stakeholders.

The multiple case study evaluation recognised 13 redundant skills and 16 emerging OSC skills such as architects with building information modelling and design for manufacture and assembly knowledge, architects specialised in design and logistics integration, advanced OSC technical skills, factory operators, OSC estimators, technicians for three dimensional visualisation and computer numeric control operators. Interview findings assessed the current state and future directions for OSC skills development. Findings indicate that the prevailing skills are not adequate to readily relocate construction activities from onsite to offsite.

To the best of the authors’ knowledge, this research is one of the first studies that recognises the major differences in skill requirements for non-volumetric and volumetric OSC types.

The purpose of this paper is to improve the problem of kinematics incompatibility of human–exoskeleton in the existing rigid lower-limb exoskeleton (LLE).

In this paper, following an introduction, the motion characteristics of the human knee joint and the design method of the exoskeleton were introduced. A kinematics model of the LLE based on cross-four-bar linkage was obtained. The structural parameters of the LLE mechanism were optimized by the particle swarm optimization algorithm. The predefined trajectories used in the optimization process were derived from the ankle joint, not the instantaneous center of rotation of the knee joint. Finally, the motion deviation of the optimization result was simulated, and the human–exoskeleton coordination experiment was designed to compare with the traditional single-axis knee joint in terms of comfort and coordination.

The lower limb exoskeleton mechanism obtained in this paper has a good tracking effect on human movement and has been improved in terms of comfort and coordination compared with the traditional single-axis knee joint.

The customized exoskeleton design method introduced in this paper is relatively simple, and the obtained exoskeleton has better movement coordination than the traditional exoskeleton. It can provide a reference for the design of lower limb exoskeleton and lower limb orthosis.

This study aims to present a state-of-the-art review of building information modelling (BIM) in the Swedish construction practice with a focus on wood construction. It focuses on examining the extent, maturity and actual practices of BIM in the Swedish wood construction industry, by analysing practitioners’ perspectives on the current state of BIM and its perceived benefits.

A qualitative approach was selected, given the study’s exploratory character. Initially, an extensive review was undertaken to examine the current state of BIM utilisation and its associated advantages within the construction industry. Subsequently, empirical data were acquired through semi-structured interviews featuring open-ended questions, aimed at comprehensively assessing the prevailing extent of BIM integration within the Swedish wood construction sector.

The research concluded that the wood construction industry in Sweden is shifting towards BIM on different levels, where in some cases, the level of implementation is still modest. It should be emphasised that the wood construction industry in Sweden is not realising the full potential of BIM. The industry is still using a combination of BIM and traditional methods, thus, limiting the benefits that full BIM implementation could offer the industry.

This study provided empirical evidence on the current perceptions and state of practice of the Swedish wood construction industry regarding BIM maturity.