Abdus Salam Azad, Mohd Salman, S.C. Kaushik and Dibakar Rakshit
Lighting in building sectors (consumes the highest energy in commercial buildings and the second highest in residential buildings in India) has very much potential for energy…
Abstract
Purpose
Lighting in building sectors (consumes the highest energy in commercial buildings and the second highest in residential buildings in India) has very much potential for energy conservation in buildings. With the use of daylighting system, energy consumption in lighting can be lowered up to 30 to 40 per cent.
Design/methodology/approach
An experimental effort has been made in this paper to explore the internal wall coloring effect on the performance of tubular light pipe. Trace-pro software has been used and validated. With the help of this software, light pipe has been designed and simulated in a ray tracing mode. Assessment of four globally used prediction models has also been conducted to compare the performances in different seasons for light pipes in the composite climate of New Delhi.
Findings
It has been conducted based on three statistical indicators as mean bias error, root mean square error and R2. Using regression, an empirical model for average internal illuminance has been developed as a function of light reflectance value (LRV) and solar altitude angle. Trace-pro results confirmed that maximum internal illuminance can be obtained with wall surfaces coated with high LRV color. Finally, by using of a single light pipe system for a test room with the artificial lighting system and applying continuous dimming control, the amount of electrical energy has been saved up to 38.5 per cent per year.
Originality/value
After going through the literature, it has been identified that there has been no paper published which explores the effect of colors of the internal walls on the performance of the light pipe. Along with this, the comparison between existing empirical performance models and find out which model gives the best result in different seasons has been carried out for New Delhi, India.
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Oluwaseun Dosumu and Clinton Ohis Aigbavboa
This paper aims to investigate the level of awareness about, adoption of and willingness to adopt light steel (LS) for building projects. It also assessed the benefits, challenges…
Abstract
Purpose
This paper aims to investigate the level of awareness about, adoption of and willingness to adopt light steel (LS) for building projects. It also assessed the benefits, challenges and solutions to the challenges of adopting LS for building projects.
Design/methodology/approach
The quantitative (questionnaire) research method was used for the study. The research design was survey in nature. The whole-population cluster sampling technique was adopted. The clusters were the LS buildings from two (Western Cape and Gauteng) out of the eight provinces in South Africa. The respondents were the construction organizations that have executed LS building projects in the selected provinces. Hence, 56 firms filled and returned the questionnaire. Data analysis was done with frequency, mean scores, t-test and analysis of variance (normality of data distribution assumed).
Findings
Results indicated that, out of the 29 areas of application of LS identified in literature, respondents were aware of 11 areas, adopted LS for seven areas and were willing to adopt LS for six areas. Respondents also noted that 18 of the 25 identified benefits of LS were relevant to South Africa. Despite the benefits, few developers embrace it, it is a threat to suppliers’ and contractors’ businesses and it delays building approval due to low awareness.
Practical implication
The implication of the results is that there is low awareness about, adoption of and willingness to adopt LS for building projects in South Africa, and this may be due to the identified challenges. To boost the awareness about, adoption of and willingness to adopt LS, LS technologies need to be imported, LS warehouses should be provided in all cities and it must be ensured that LS building projects are cheaper than conventional buildings.
Originality/value
The value of the study is that the adoption of LS for building projects will improve the capacity of sustainable development.
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The functions of lighting Lighting is provided in a building to fulfil three basic functions:
FOR a number of years now it has been evident that a successor to the well‐tried Vickers Viscount and Convoir 240/340/440 series was required. However, the big problem was to…
Abstract
FOR a number of years now it has been evident that a successor to the well‐tried Vickers Viscount and Convoir 240/340/440 series was required. However, the big problem was to design an aircraft such that its economics and passengerappealweresub‐stantially better than the machines it would ultimately replace. Other important factors which had to be con‐sidered were improved reliability, easier and cheaper maintenance, higher standards of safety and means of reducing ramp times. Furthermore, the difficult choice of passenger capacity and cruising speed had to be made. Probably the easiest decision was to employ the twin‐engine configuration with the power plants placed in the now familiar rear position, one on cither side of the fuselage.
131A Aluminium Alloy Sand or Die Castings (suitable for Pistons, etc.).
Built asset management — MSc for facilities managers Growing professionalism in facilities management is reflected in the University of Reading's decision to restructure and…
Abstract
Built asset management — MSc for facilities managers Growing professionalism in facilities management is reflected in the University of Reading's decision to restructure and expand its existing post‐graduate course in maintenance management.
Russell D. Johnson and Brian H. Kleiner
The conventional wisdom of managers in the US dictates that improving product quality will increase the cost of making the product which will either increase the price or reduce…
Abstract
The conventional wisdom of managers in the US dictates that improving product quality will increase the cost of making the product which will either increase the price or reduce the profits. Shows that improving the quality of a product or service will not necessarily increase its manufacturing cost. Obtains information on fundamental theories and case histories from business literature and uses evidence to support the hypothesis from the case histories of several US companies which have achieved higher quality with lower quality costs and improved profitability. Examples from the literature include the case histories of companies such as Florida Power & Light, Globe Metallurgical, Motorola, and Westinghouse Commercial Nuclear Fuel Division. These examples indicate increases in return on assets, improved customer satisfaction, increased market share, and increased revenues and profits. Suggests that a company which can achieve successfully both higher quality and lower cost will have improved productivity, lower manufacturing costs, better quality, greater customer satisfaction, a higher market share and greater profitability.
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Nils Hoeller, Christoph Reinke, Jana Neumann, Sven Groppe, Christian Werner and Volker Linnemann
In the last decade, XML has become the de facto standard for data exchange in the world wide web (WWW). The positive benefits of data exchangeability to support system and…
Abstract
Purpose
In the last decade, XML has become the de facto standard for data exchange in the world wide web (WWW). The positive benefits of data exchangeability to support system and software heterogeneity on application level and easy WWW integration make XML an ideal data format for many other application and network scenarios like wireless sensor networks (WSNs). Moreover, the usage of XML encourages using standardized techniques like SOAP to adapt the service‐oriented paradigm to sensor network engineering. Nevertheless, integrating XML usage in WSN data management is limited by the low hardware resources that require efficient XML data management strategies suitable to bridge the general resource gap. The purpose of this paper is to present two separate strategies on integrating XML data management in WSNs.
Design/methodology/approach
The paper presents two separate strategies on integrating XML data management in WSNs that have been implemented and are running on today's sensor node platforms. The paper shows how XML data can be processed and how XPath queries can be evaluated dynamically. In an extended evaluation, the performance of both strategies concerning the memory and energy efficiency are compared and both solutions are shown to have application domains fully applicable on today's sensor node products.
Findings
This work shows that dynamic XML data management and query evaluation is possible on sensor nodes with strict limitations in terms of memory, processing power and energy supply.
Originality/value
The paper presents an optimized stream‐based XML compression technique and shows how XML queries can be evaluated on compressed XML bit streams using generic pushdown automata. To the best of the authors' knowledge, this is the first complete approach on integrating dynamic XML data management into WSNs.
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In recent years, we have witnessed a surge in academic interest towards migrants and their entrepreneurial endeavours. This has resulted in valuable insights about immigrant…
Abstract
In recent years, we have witnessed a surge in academic interest towards migrants and their entrepreneurial endeavours. This has resulted in valuable insights about immigrant, transnational, ethnic and diaspora entrepreneurship. By reviewing 158 articles published in the fields of migrant entrepreneurship, transnational entrepreneurship, ethnic and diaspora entrepreneurship over the last decade, the author maps the migrant entrepreneurship field according to the level of analysis and suggests potential avenues for the development of the field. Blurred boundaries between different streams of literature can potentially lead to duplication of efforts and harm cumulativity of knowledge. Therefore, the author summarises the key findings at each level of analysis, identifies the gaps and most pressing research questions. The author concluded that the field would benefit from (1) more specific definitions and assessment of whether observed findings stem from immigrant-, transnational-, ethnic- or diaspora-related factors; (2) appreciating the multilevel nature of the phenomenon; and (3) clarifying the boundary conditions. This review contributes to the accumulation of knowledge in two ways. First, it synthesises the findings in the fields of transnational, immigrant, ethnic and diaspora entrepreneurship under the framework of migrant entrepreneurship. Second, it suggests potential research directions across three levels of analysis and in-between those levels.
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The paper is making a preliminary evaluation of dark tourism potential in Bulgaria. Dark tourism is underestimated research topic in Bulgaria – a country with long and rich…
Abstract
Purpose
The paper is making a preliminary evaluation of dark tourism potential in Bulgaria. Dark tourism is underestimated research topic in Bulgaria – a country with long and rich cultural heritage, belonging to orthodox religion, with ambiguous impacts from the communist/socialist political regime and nowadays being a typical destination for mass and 3 “S” (sun, sand, sea) tourism. The research topic is approached by starting with an inventory and classification of the main tourist attractions/sites for dark tourism according to the most widely applicable theoretical typologies, inclusively their territorial density, cities location, authenticity and commercialization. The general counterpoint is the non-western approach and the hypothesis that dark places/attractions can be explored as potential tourist resources, diversifying the cities destination supply. The places related to death within the death-tourism framework are explored within the urban landscape. The research applies supply-demand approach and includes semi-structured interviews with different stakeholders from the supply side and a questionnaire accessing the tourist’s perspective and readiness from the demand side. Special attentions is given to the cities as concentrating the major part of the dark sites/attractions in the country, being at the same time integral part of the public areas and urban landscape, with special designation and/or combination of additional recreational functions. The data and results from the conducted research revealed that dark tourism in Bulgaria, in the narrowest sense is relatively unknown, unexplored type of tourism, difficult to distinguish and overlapping with other types of tourism mainly in the cities. The paper also raises the discussion about the necessity to extend the dark tourism research in the cities, taking into account the non-western approach and cultural sensitiveness. The paper aims to discuss these issues.
Design/methodology/approach
The methodology of the research, in its nature, is purely qualitative, widest and most applicable (Biran A., Hyde K., 2013), (Wight, 2006) (Light, 2017) and follows two main stages: inventory, classification and potential of the dark tourism sites/attractions in Bulgaria and supply-demand approach for pilot exploratory study of the reediness of the suppliers and main stakeholders from one side, and the tourist’s perceptions from other side.
Findings
The data and results from the conducted research revealed that dark tourism in the narrowest sense in Bulgaria is relatively unknown, unexplored type of tourism, difficult to distinguish and overlapping with other types of tourism mainly in the cities. The findings challenge the predominant understanding of dark tourism typology, spectrum, and type of places/attractions (Light, 2017). Within the tourism-death relationship framework in the non-western approach with narrow focus in Bulgaria as research area, the author can confirm that the concept of dark tourism research should be extended taking into account the religion (relationship to death), historical development and political regime. The results obtained clearly show that the main difference from the western approach lies in on completely different conceptual basis, which differs from the concept of dark tourism. Tourism is mostly linked with recreation, leisure, and entertainment, while the dark places/sites related to death and suffer are mostly linked to religion, historical or political heritage. Besides being different both create and conduct to a behavior and visit of such places with deserved respect, honor and part of national identity and culture.
Research limitations/implications
The study’s focus is narrow and limited at national level as part of “eastern” (non-western) context of tourism-death relationship framework. The findings resulted from pilot exploratory study provide theoretical and practical insights into understanding of dark tourism and its potential development in Bulgaria by considering the availability of dark sites/attractions, supply (readiness of main stakeholders) and demand side (tourist’s perspective). The paper limits the research in the post-modern context stressing on tourism/leisure and commercial use of death as attractions and places. Other limitations are pilot character of the exploratory study and the limited number of respondents.
Practical implications
The paper delivers practical insights into understanding of dark tourism and its potential development in Bulgaria by considering the availability of dark sites/attractions, supply (readiness of main stakeholders) and demand side (tourist’s perspective).
Originality/value
Most of the research in the field of dark tourism as expression of tourism-death relationship framework are concentrated on the “western way of thinking” (Light, 2017, p. 297) covering countries from West Europe, USA, Australia (Foote, 1997), (Bowman M., Pezzullo P., 2010, p. 188). The use of Western frameworks for understanding the tourism-death relationship in other parts of the world and particularly in Bulgaria as Eastern European and orthodox country may not be appropriate. For the specific research area – the case of Bulgaria, theoretically although incorrect, a parallel is possible between the western post-modern secularism and atheism as official communist policy between 1940 and 1990 (Metodiev, 2013). Darkness of sites/attraction identified within the tourism-death relationship and exploitation of the death is seen supporting and commemorating the sacrifice of the “heroes” of the time keeping them “eternally alive” and as symbols, incarnations of the “sacral” political power.