A novel methodology for e-learning space design in HEI campuses

The Higher Education Institution and the Construction Industry are yet to define the most appropriate and effective design parameters for E-learning spaces. Those which exist, focus mainly on cost, budget and timely delivery i.e. the process only not the product. An effective approach to E-learning space design is needed to address the problems of space efficiency, effectiveness, quality, innovativeness, performance and client satisfaction. This study aimed to develop a novel methodology for e-learning space design, by investigating: the impact of e-learning on facilities and design; the impact of e-learning on the design of future spaces; the impact of blended learning on space design; designing for the learn anytime, anywhere paradigm; security issues of e-learning and e-learning space design, the levels of design risk in an e-learning infrastructure and inclusive design issues. A Grounded theory approach was used during initial desk studies, synchronized with a three part forum and pilot survey of 33participants. From this process, two hypotheses emerged; firstly, e-learning space design could affect users‘ learning outcomes and secondly that; user‘s learning requirements were different and varied. To investigate further, site based analyses of 11 HEI‘s, 10 interviews and subsequently a questionnaire survey was administered. Users‘ and stakeholders requirements and good examples of e-learning space design were identified. Data were analysed using a mixed-method research design approach. Three main constructs, Space design, Technology and the E-learning Space Design research focus (ELSD focus), emerged as significant components in the development of a novel framework for the design of e-learning spaces. The relationship between the components is such that the design of spaces with consideration of the ELSD research focus would ensure the effective identification, interpretation and delivery of users‘ requirement while maximising the benefits of the adoption of appropriate technology within HEI facilities. This was therefore proposed as the realistic framework/model for future design of E- learning Spaces in HEI campuses. The framework was adapted into a conceptual design guide to provide guidance for future space design. It is expected the study will support the HEI sector globally as it moves towards achieving best practice solutions to future E-learning space design in HEI campuses.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

A Holistic Approach to Large-Scale Housing Development in Urban Ethiopia

Due to the rapid urbanization of Ethiopian cities, the growing demand for housing in its urban areas has accelerated the development of large-scale housing projects. This has created a challenge for local authorities responsible for their development in a relatively short period of time. Therefore, current housing development follows the conventional approach where limited building types are developed and replicated with minor modifications to accommodate given site conditions. This strategy has resulted in an environment that is not suitable for the traditional lifestyle of common Ethiopian. Studies show that the lack of social and cultural considerations in the current development has hampered the quality of life of its residents. The research conducted in this paper proposes a holistic approach to large-scale housing development in order to provide optimized solutions for social mix and multi-generation family life style in Ethiopia. The holistic approach is developed within a parametric modeling environment supported by Rhinoceros 3D & Grasshopper and its plug-ins in order to enhance design feasibility studies. The approach is based upon four major components such as 1) social and cultural factors, 2) a neighborhood model of urban typology, 3) a financial model and 4) a massing study model that delineates the possible building variations. A research project location in Addis Ababa, Ethiopia is selected as a test site for the proposed development strategy. The site is part of a large informal settlement that was demolished and replaced by a typical low-cost housing development composed of four and seven story towers. The goal is to generate an alternative building typology based on the new holistic approach, which meets the social, cultural and economic needs of tenants. Analysis of informal settlements in Addis Ababa has identified multigenerational living, socially and financially mixed communities as important ingredients for building a sustainable community. It was also discovered that semiprivate spaces, circulation paths and scalable housing units as key spatial variables that are necessary for the successful cultivation of these communities. Based upon the analysis of social and cultural factors of given urban district, a neighborhood model is developed from existing site context and defined as a space holder for including various architectural programs such as different unit types (studio, one-bed, two-bed), spatial definitions (private, semiprivate, public), and circulation (vertical and horizontal). The financial model is based on the optimization among the three criteria including market value, construction cost, and government incentives in order to provide tangible benefits for encouraging various income groups to participate in this social mix largescale housing community. The financial model guides the direction of generating massing model variations with the parametric application in the boundary of the neighborhood model in terms of 1) number of units, 2) arrangement of spatial definitions, and 3) configuration of circulation. The direct connection between financial model and massing model within neighborhood boundary condition allows a developer to review design alternatives with changing numbers, at the same time, an architect to understand a financial condition of each alternative with modifying designs

Space-centred information management approach to improve CAD-based healthcare building design

This study focuses on developing a space-centred CAD tool to enable designers to effectively manage and implement the information of design guidance information and user requirements during design processes, especially for the stages of design briefing and conceptual design. It aims to structure and store design guidance and user requirements for healthcare building design into a relational database, and link them to relevant space entities in design plans. The tool is developed on the platform of Autodesk Architecture Desktop (ADT). It also enables users to store and retrieve pictures associated with textual information, because pictures have been always used by designers as an effective medium to represent and deliver design information and knowledge. This can give users directly visual and more understandable perceptions of the design guidance. The tool is fully embedded with Autodesk AutoCAD systems to ensure the application of this tool being fully merged with CAD-based design process. A set of design guidance about Alzheimer clinic built environments are adopted as a sample to demonstrate and validate the tool. Moreover, the scenario of expanding this application to more broad areas has also been foreseen

UML to XML-Schema Transformation: a Case Study in Managing Alternative Model Transformations in MDA

In a Model Driven Architecture (MDA) software development process, models are\ud repeatedly transformed to other models in order to finally achieve a set of models with enough details to implement a system. Generally, there are multiple ways to transform one model into another model. Alternative target models differ in their quality properties and the selection of a particular model is determined on the basis of specific requirements. Software engineers must be able to identify, compare and select the appropriate transformations within the given set of requirements. The current transformation languages used for describing and executing model transformations only provide means to specify the transformations but do not help to identify and select from the alternative transformations. In this paper we propose a process and a set of techniques for constructing a transformation space for a given transformation problem. The process uses a source model, its meta-model and the meta-model of the target as input and generates a transformation space. Every element in that space represents a transformation that produces a result that is an instance of the target meta-model. The requirements that must be fulfilled by the result are captured and represented in a quality model. We explain our approach using an illustrative example for transforming a platform independent model expressed in UML into platform specific models that represent XML schemas. A particular quality model of extensibility is presented in the paper

Learning through prefabrication

The use of prefabrication in design exemplar houses has escalated in Australia in the past decade. The same level of design quality has not been applied to the design of prefabricated school buildings. As CADCAM technology becomes more prevalent within the construction industry and greener, smarter materials are developed, new opportunities arise in the design of learning spaces. What can be learnt from bespoke prefabrication techniques being developed in other industries and overseas in order to advance the design and delivery of learning spaces within Australia? This research investigates whether industrial design methodologies might be strategically adopted into architectural design in order to incorporate mass production techniques. Learning environments need to be designed to be environmentally efficient, place specific and better suited to user needs. By including both macro and micro oriented scenarios, the research aims to clarify the challenges for using prefabrication in the design of learning environments. While this ambitious research is in its infancy, the complex framework and support from industry is relevant for other researchers who are seeking to have an impact on design practice using an action research methodology. The research is timely. Following in the footsteps of the United Kingdom, Australian state and federal governments have committed to reinvigorate our aging school stock. This research led by an interdisciplinary team is being developed in partnership with Departments of Education in three Australian states. The aim is to align designers with experts in prefabricated construction and delivery. The research proposal is positioned within current knowledge as demonstrated through a literature review. Its focus is in response to needs expressed by providers of school buildings in three Australian states. The key innovation is to undertake research concurrently as micro and macro scale in order to capture the potential for industry wide change. Keywords: Learning spaces, school design, bespoke prefabrication, prefabrication in architecture, design research, CADCAM.</p

Physical performance and durability evaluation of rubberized concrete

The main objective of this research is to develop rubberized concrete with achievable structural strength using simple mix design. Simple mix design is a description by using the crumb rubber, used as in condition just received from the plant without any washing or pre-treating procedure. Then, three types of durability test were conducted namely, 1) Chloride ion diffusion test, 2) Abrasion wear resistance test, and 3) Freezing and thawing test. Up-to-date, many successful achievements were reported by researchers around the world. However, in Asian cases, very rare information on the use of wasted as a mixture component is gathered. By conducting this study, it could provide useful and valuable knowledge for construction technology especially for Asian industry. This dissertation consists mainly of the seven chapters. In Chapter 1, the background, problem statement, significance, research contribution and novelty of this study are listed out. In Chapter 2, research review on previous researchers work on the application of waste tire rubber in mortar/concrete and durability are described. Several important properties related to this study were viewed and discussed. High reduction in strength properties was observed by previous researchers and many suggestions were proposed either by washing the rubber or the use of suitable treatment on the rubber surface in order to enhance the bonding of the matrix. However, in my research, by using conventional mixing method, it was proposed that to use the rubber without any treatment (use directly as received) with maximum 20% sand replacement in volume is a method to use crumb rubber effectively. As a result, each rubberized mixture showed an acceptable structural strength value. In Chapter 3, three step-by-step stages of mix design were conducted and discussed. The first stage was the preliminary study to determine the suitable waste tire rubber size and percentage replacement that can be used in rubberized mortar. Three rubber size group were received from the industry plant which where combination of 1mm-3mm, combination of 0.71mm-1.7mm and 0.425mm. Size of 1mm – 3mm with 10% of sand replacement was chosen in terms of acceptable fresh and hardened mortar properties. In second stage, suitable water-to-cement ratio (w/c) and required additional binder was determined before proceeding to concrete mix. Results shows that w/c = 0.35 gave reliable mortar physical properties. Finally, rubberized concrete with w/c =0.35 was carried out and specimens were prepared for mechanical test and durability test. Along these three stages, air content was carefully studied and controlled. In Chapter 4, experimental work and discussion on chloride ion diffusion in rubberized concrete tested by migration test and by immersion in salt water was described. Effective diffusion coefficient, De test was conducted according to JSCE-G571-2003. Meanwhile, immersion test in salt water was conducted according to JSCE-G572-2003. Additional concrete specimen with w/c = 0.50 was prepared to study the effectiveness of CR in high w/c in comparison with w/c = 0.35. Results showed that chloride transport characteristics were improved by increasing the amount of CR due to the fact that CR has the ability to repel water. Meanwhile, rubberized concrete with w/c = 0.35 gave better resistance against chloride ion compared to w/c = 0.50. In Chapter 5, discussion on the effectiveness of crumb rubber to improve wear resistance tested by surface abrasion test was described. An experimental study on abrasion wear resistance was conducted on mortar (w/c = 0.35, 0.30 and 0.25) and concrete (w/c = 0.35) specimen containing CR with and without silica fume. From test results, it was clearly seen that 10% crumb rubber addition as sand replacement provide good resistance against abrasion. Meanwhile, compressive strength was the most important factor affecting the abrasion resistance, where abrasion resistance was increased with an increase in compressive strength. However, abrasion resistance was found to be slightly decreased when compressive strength exceeds 50N/mm2. In Chapter 6, the role of crumb rubber as air void under freezing and thawing was studied. Specimen was prepared in three groups; first group was the specimen without silica fume with air content ranging between 4% to 5%, second group was the specimen without silica fume with air content ranging between 0% to 1.5% and third group was the specimen with silica fume with air content ranging between 4% to 5%. These rubberized concrete were tested on freezing and thawing resistance to understand this behavior. The temperature for freezing and thawing was set to 15oC ±5oC for thawing temperature and -18oC ±5oC for freezing. This test was continued until 300 cycles according to ASTM C666. Results show that up to 300 freeze-thaw cycle, there was no minus effect observed for all specimen. In Chapter 7, conclusions are drawn based on Chapter 4 to Chapter 6 and recommendations for future works is presented

An evaluation tool for design quality: PFI sheltered housing

The complex procurement process entailed by the private finance initiative (PFI) means that clients need new capacities to manage their relationships with bidders and to assess project proposals if the desired level of design quality is to be achieved. To assist local authorities in their client role, a new Architectural Design Quality Evaluation Tool was developed. The aim was to improve the quality of design in residential sheltered housing, procured through the PFI. The tool was developed for and applied to a programme that will see the replacement of a local authority's entire sheltered housing stock. The tool has two functions: (1) to inform the client's assessment process and assist with the selection of the preferred bidding consortium through a series of stages in the PFI process; and (2) to improve the quality of all the submitted designs through an iterative process. Although several existing mechanisms are available for evaluating the performance attributes of buildings, few also tackle the less tangible amenity attributes, which are vital to the feeling of home. The new tool emphasizes the amenity attributes without neglecting performance