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1 – 10 of over 17000Md. 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 load. This…
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.
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Linda Wulf, Markus Garschall, Michael Klein and Manfred Tscheligi
The purpose of this paper is to gain deeper insights into performance differences of younger and older users when performing touch gestures, as well as the influence of tablet…
Abstract
Purpose
The purpose of this paper is to gain deeper insights into performance differences of younger and older users when performing touch gestures, as well as the influence of tablet device orientation (portrait vs landscape).
Design/methodology/approach
The authors performed a comparative study involving 20 younger (25-45 years) and 20 older participants (65-85 years). Each participant executed six gestures with each device orientation. Age was set as a between-subject factor. The dependent variables were task completion time and error rates (missed target rate and finger lift rate). To measure various performance characteristics, the authors implemented an application for the iPad that logged completion time and error rates of the participants when performing six gestural tasks – tap, drag, pinch, pinch-pan, rotate left and rotate right – for both device orientations.
Findings
The results show a significant effect of age on completion time and error rates. Means reveal faster completion times and lower error rates for younger users than for older users. In addition, a significant effect of device orientation on error rates could be stated. Means show higher error rates for portrait orientation than for landscape orientation. Qualitative results reveal a clear preference for landscape orientation in both age groups and a lower acceptance of rotation gestures among older participants.
Originality/value
In this study the authors were able to show the importance of device orientation as an influencing factor on touch interaction performance, indicating that age is not the exclusive influencing factor.
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There are two commercially accepted methods of force control used in automated surface finishing today. The first method, “through‐the‐arm” force control, applies force using the…
Abstract
There are two commercially accepted methods of force control used in automated surface finishing today. The first method, “through‐the‐arm” force control, applies force using the position of all the robot axes in unison. The second method, “around‐the‐arm” force control, uses the robot for positioning motion only, and applies a controlled force through an auxiliary‐compliant end‐of‐arm tool. Discusses the theory, applicability and features of each of these two technologies.
Charles B. Owen, Alison Dobbins and Lisa Rebenitsch
Theatre Engine is a three-phase project exploring the integration of mobile devices such as smart phones and tablet computers as user interaction mechanisms for live theatrical…
Abstract
Purpose
Theatre Engine is a three-phase project exploring the integration of mobile devices such as smart phones and tablet computers as user interaction mechanisms for live theatrical performances. This paper aims to describe the technical details for the first performance in the series: transitions, including system design, user interface details, and lessons learned.
Design/methodology/approach
The Theatre Engine project consists of a network of mobile Android-based devices that communicate with a server managing a live theatrical performance. Additional systems provide projected graphics within the performance space, dynamic instructions to live musicians, and control of theatrical equipment including robotic lighting. The system is under the live control of a stage managers and show runner. The first phase produced the performance transitions, where live and virtual dancers interacted with audience members.
Findings
The user activities are described in the context of manipulations and the effects of those manipulations and a classification of the roles of users as active participants in the performance is proposed. The concept of blurring the distinction between real and virtual is explored.
Originality/value
Technological advances make it possible for the audience to be an active participant in a performance, converting a passive theatrical experience to an active and immersive experience. Theatre Engine is a new approach to the integration of mobile devices into the theatre and a test-bed for new user interface ideas.
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Guan Yuan, Zhaohui Wang, Fanrong Meng, Qiuyan Yan and Shixiong Xia
Currently, ubiquitous smartphones embedded with various sensors provide a convenient way to collect raw sequence data. These data bridges the gap between human activity and…
Abstract
Purpose
Currently, ubiquitous smartphones embedded with various sensors provide a convenient way to collect raw sequence data. These data bridges the gap between human activity and multiple sensors. Human activity recognition has been widely used in quite a lot of aspects in our daily life, such as medical security, personal safety, living assistance and so on.
Design/methodology/approach
To provide an overview, the authors survey and summarize some important technologies and involved key issues of human activity recognition, including activity categorization, feature engineering as well as typical algorithms presented in recent years. In this paper, the authors first introduce the character of embedded sensors and dsiscuss their features, as well as survey some data labeling strategies to get ground truth label. Then, following the process of human activity recognition, the authors discuss the methods and techniques of raw data preprocessing and feature extraction, and summarize some popular algorithms used in model training and activity recognizing. Third, they introduce some interesting application scenarios of human activity recognition and provide some available data sets as ground truth data to validate proposed algorithms.
Findings
The authors summarize their viewpoints on human activity recognition, discuss the main challenges and point out some potential research directions.
Originality/value
It is hoped that this work will serve as the steppingstone for those interested in advancing human activity recognition.
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Ryoichi Yoshida and Mikihisa Tajima
Outlines development work on the surfing hopper, a new parts feedingsystem where chain conveyors with free rollers are driven by avariable‐speed motor and a flexible belt is…
Abstract
Outlines development work on the surfing hopper, a new parts feeding system where chain conveyors with free rollers are driven by a variable‐speed motor and a flexible belt is pushed up partly by the free rollers to generate a wave in the belt. Describes how the wave effect keeps the stacked parts level and how experiments were carried out using different parts materials such as small water‐filled bottles and nuts made of steel. Looks at studies carried out on feeding correctly orientated parts to the assembly station and experiments on surfing feeding system with regard to part separation on the belt. Concludes that the surfing hopper can supply heavy parts intermittently at a rough definite supply ratio, without jamming and entangling the parts and without damage to the belt.
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Mark Turner, Stephen Dowsland, Aron Mazel and Myra Giesen
Crowdsourcing heritage information has enormous potential to help gather data needed to make decisions over the deployment of resources and heritage conservation funding. Taking…
Abstract
Purpose
Crowdsourcing heritage information has enormous potential to help gather data needed to make decisions over the deployment of resources and heritage conservation funding. Taking advantage of the rapid proliferation of mobile devices, such as phones and tablets, packed with sensors to record data about the real world, and the global growth of mobile app stores, reaching potential crowdsourcing volunteers is easier than ever before. The purpose of this paper is to describe the design of a mobile application known as Rock Art CARE (condition assessment risk evaluation) to crowdsource heritage conservation data, in the context of rock art conservation.
Design/methodology/approach
As with conservation efforts of any kind, accurate information is vital to make informed triage decisions over where to route effort, resources and funding. The Rock Art CARE application is a cross-platform mobile application for crowdsourcing information about rock art carvings, where the collated data are stored in a central location for access by different stakeholders.
Findings
The paper goes on to detail the web portal with its application programming interface and database schema, and how the collected data are passed on to policy and decision makers to aid in the identification and conservation of the carvings most at risk.
Originality/value
The paper presents a method of harnessing common technology to forge a link between the mobile devices of the general public and key stakeholders responsible for the preservation of the UK’s rock art.
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This paper reports on the planning, introduction, and implementation of surface mount technology (SMT) for printed circuit board assembly at Convergent Technologies. It is written…
Abstract
This paper reports on the planning, introduction, and implementation of surface mount technology (SMT) for printed circuit board assembly at Convergent Technologies. It is written from the production personnel's view‐point. The report starts with a brief history of the company, describes its dynamic environment, outlines the factors that led to the decision to implement SMT and provides the time‐frame for said implementation. With this background the paper then deals at length with design and manufacturing issues and questions that arose during this undertaking. The report concludes with a summary that outlines the benefits and concerns of SMT and highlights the future trends for this technology.
Francesco De Luca, Hendrik Voll and Martin Thalfeldt
The purpose of this paper is to constitute an efficient way to improve energy efficiency and occupants comfort in buildings through reduction of direct solar heat gains by…
Abstract
Purpose
The purpose of this paper is to constitute an efficient way to improve energy efficiency and occupants comfort in buildings through reduction of direct solar heat gains by exterior shading devices. The shadings orientation and layout depends on the building location and façade orientation, and influence consequently the windows layout. It is still debated which type of window layout is preferable for a specific building location and façade orientation.
Design/methodology/approach
The paper presents a method to determine the most efficient windows’ layout, horizontal or vertical, for shading devices optimization by mean of integrating energy simulations and computational design. A parametric model has been built by visual programming language to simulate, iterate and compare the results.
Findings
The research shows the most efficient layouts of windows to be shaded for three latitudes and locations, and the 16 cardinal directions, to be used by architects and designers. The results show a significant prevalence of the horizontal window type on the south façades but also on the east and west orientations for all the three locations, while the rules of thumb would suggest the vertical layout for the sunrise and sunset façades.
Originality/value
The task of designing exterior shading devices presents two main issues: the shading period selection and the method of calculating its size and shape. The present research uses the innovative method Shaderade that existing literature demonstrates superior comparing other more dated like the section method and the solar vectors one.
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Jose Manuel Sierra, Jose Ignacio Rodríguez, Marta María Villazon, Jose Luis Cortizo and Maria del Rocio Fernandez
This paper aims to describe the development of an internal waste-collection device for patients who have undergone a colostomy or ileostomy. Its design is based on devices that…
Abstract
Purpose
This paper aims to describe the development of an internal waste-collection device for patients who have undergone a colostomy or ileostomy. Its design is based on devices that have been produced by 3D printing with acrylonitrile butadiene styrene. The aim is to find an alternative to the external bags that these patients currently use and to evaluate the properties of the device produced by additive manufacturing.
Design/methodology/approach
Software for solid modelling has been used, and virtual models allow its visualization and animation, for evaluation, in a simple and fast way. Subsequently, functional prototypes have been developed by a multidisciplinary team, which includes surgeons and engineers, and have been tested to verify their mechanical properties and suitability for function.
Findings
The project has developed a functional design that has been patented and is in the clinical trials phase. This study demonstrates how 3D printing technologies are the perfect complement to accelerate the design process and build functional prototypes at low costs. The experimental tests regarding cytotoxicity, printing orientation, dynamic and static loads and temperature resistance have demonstrated the validity of the proposed device.
Originality/value
A device for internal pouch in colostomized patients has been designed, manufactured by fused deposition modelling and validated.
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