19,247 research outputs found
A Sophisticated Method of the Mechanical Design of Cable Accessories Focusing on Interface Contact Pressure
No full textThe most critical positions of a prefabricated cable accessory, from the electrical point of view, are the interfaces between the stress cone and its surroundings. Accordingly, the contact pressure on those interfaces needs to be carefully designed to assure both good dielectric strength and smooth installation of the stress cone. Nevertheless, since stress cones made from rubber are under large deformation after installation, their internal stress distribution is neither practical to measure directly by planting sensors, nor feasible to compute accurately with the conventional theory of linear structural mechanics. This paper presents one sophisticated method for computing the mechanical stress distribution in rubber stress cones of cable accessories by employing hyperelastic models in a computation model based on the finite element method. This method offers accurate results for rubber bodies of complex geometries and large deformations. Based on the method, a case study of a composite prefabricated termination for extruded cables is presented, and the sensitivity analysis is given as well
Relative Pointing Interface: A gesture interaction method based on the ability to divide space
No full textA new type of 3D gesture interface called Relative Pointing Interface (RelPolnt) is suggested in this study. RelPoInt allows users to select a virtual button by pointing to a relative position in a virtual 3D menu. This approach makes use of the distance or angle between the relative point and the reference point. Users can set the reference point freely and operate all the functions on the menu with a simple gesture. Microsoft Kinect was used to implement the RelPoInt in this study. To suggest a radial menu suitable for the RelPoInt, we conducted an experiment in which 20 participants were asked to point to virtual buttons, which were divided into four to eight regions. Errors and subjective assessment of easiness were measured at each treatment condition. RelPoInt can make users to manipulate functions without memorizing complicated gesture vocabularies, which is among the most serious pain points of using a gesture interface. Furthermore, RelPolnt does not require expensive gesture recognition equipment compared with finger recognition interfaces because the required resolution of interaction recognition is less sophisticated. It can be useful in applying 3D gesture interfaces to a variety of devices for smart home, virtual or augmented reality. Relevance to industry: The proposed interface can be applied to various environments with low cost and easy to implement. Therefore, this interface is highly worthy of use in areas where gestures are useful to interact, such as IoT (Internet of Things) and VR (Virtual Reality)/AR (Augmented Reality).11Nsciessciscopu
Development of Cable Accessories with SiR Insulation for 320kV HVDC Cables
No full textHVDC cable accessories with environment-friendly insulating material and flexible compatibility other than ethylene propylene diene monomer (EPDM) are demanded in the global market. In this paper, the authors present their newly developed silicone rubber (SiR) insulated cable joints and terminations as a potential answer to that call. Simulation models were built in computer programs. Three most venerable spots in the insulator were identified. SiR insulated accessories with optimised conductivity were produced and tested according to Cigre TB 496 and IEC 62895:2017. The test objects passed the type test with good success. It proved that with proper design, manufacturing and installation, SiR insulated cable accessories are able to provide good service in the power system networks
Unpacking Instagram use: The impact of upward social comparisons on usage patterns and affective experiences in the wild
No full textUsers of Social Networking Sites (SNS) often engage in social comparison, an experience that can elicit various affective responses. While previous studies have established important links between social comparison and emotion, the granularity and ecological validity of this work remains limited. To address this issue, we conducted a field study with 40 Instagram users. We unobtrusively recorded their Instagram usage patterns (e.g., time on site and the type of content consumed, such as feed, story, or message). Additionally, we used experience sampling methods and questionnaires to capture their affective experiences, social comparisons, and depression severity. Our results elucidate the interplay between these emotions, traits, and tendencies during Instagram use. Notably, we find that while passive or prolonged Instagram use affects users’ emotions, the magnitude of this effect depends on the frequency of users’ social comparisons. These results can inform the design of systems to improve mental well-being on SNS.
Criteria influencing the selection and design of HV and UHV DC cables in new network applications
No full textThis paper sets out to discuss the challenges that need to be addressed effectively to facilitate the adoption of long distance HV and UHV DC power transmission cables. As in the alternating current case, the desire to minimise the losses has involved the use of increasingly high transmission voltages, which presents particular problems where UHVDC cables are concerned. Specifically, this paper presents the case for a novel, integrated approach to the problem, which links three distinct aspects of the problem, namely: (i) cable ratings and network operability, (ii) cable design and constituent insulating materials requirements and (iii) potential strategies for the design of novel insulation materials, where the required properties are actively “designed in”. The paper concludes that the impact of these factors acting in concert on network operation/performance requires a more integrated approach to the problem than has traditionally been the case. A number of complementary strategies for the development of novel material technologies and UHVDC cable designs are required that can meet the service performance and ultimate service lifetimes expected for new network applications
Developing personas & use cases with user survey data: A study on the millennials’ media usage
No full textThe aim of the study is to investigate the characteristics of millennials on the usage of media (music, photo/video) and media-related devices. An online survey was conducted on 360 millennials. Based on the results, we developed representative use cases to be used in experience design projects based on the actual media usage data collected. We also classified the millennials into four specific groups by applying statistical cluster analysis techniques. The characteristics of each group were further identified. The results of this study will help designers to develop products and services that meet the needs of their target consumers.11Nssciscopu
Dataset to support the article "High-resolution 𝜙-OFDR using phase unwrap and nonlinearity suppression"
No full textThis dataset is used for realizing high resolution of phase-sensitive Optical Frequency Domain Reflectometer. It is associated with the research paper:
Guo Z, Yan J, Han G, Yu Y, Greenwood D and Marco J (2023) "High-Resolution φ-OFDR Using Phase Unwrap and Nonlinearity Suppression". Journal of Lightwave Technology, 41 (9), 2885-2891. (https://doi.org/10.1109/JLT.2023.3236775).
The data is presented as an excel file:
High_resolution_OFDR_using_phase_unwrap_and_nonlinearity_suppression.xlsx
This work was funded by High Value Manufacturing Catapult and the Engineer and Physical Sciences Research Council - EPSRC EP/V000624/1. The author Gaoce Han would like to acknowledge the China Scholarship Council for sponsoring.</span
Han Suyin (Chinese author) speaking at Dallas Brookes Hall.
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/276390Han Suyin (Chinese author) speaking at Dallas Brookes Hall.200056
Item: [1999.0081.00439] "Han Suyin (Chinese author) speaking at Dallas Brookes Hall.
- …
