Research on the key perception points in the process of e-book selection

2020 ◽  
Vol 38 (5/6) ◽  
pp. 1053-1071
Author(s):  
Sisi Xing ◽  
Aidong Peng ◽  
Yihong Mao
Keyword(s):  
Great Influence ◽  
Utilization Rate ◽  
Cognitive Resources ◽  
Digital Reading ◽  
Book Selection ◽  
Content Type ◽  
Cognitive Resource ◽  
Cognitive Resource Theory ◽  
Digital Books ◽  
Reader Comments

Purpose This paper aims to propose some suggestions for libraries and other digital reading service institutions to improve the utilization rate of e-books, based on the theoretical and empirical analysis of the perception behaviour characteristics of e-book selection under the allocation of limited cognitive resources. Design/methodology/approach From the perspective of key perception points, this paper studies the key perception points of selecting e-books through the experimental method and explores the influence of subject factors (users’ characteristics, users’ needs) on users’ e-book perception behaviour. Findings College students have selective attention in the process of selecting e-books. They will choose some important contents of e-books, such as title, book introduction, author, catalogue, reader comments, others’ recommendations, read leaderboard, to perceive and there is an obvious difference in perception intensity. Different personal traits and reading needs have a great influence on users’ perception points. Libraries and other digital reading service institutions should provide promotion information based on key perception points of e-books, develop personalized e-book service and promotion and optimize the expression of key perception points of e-books. Originality/value This paper presents a valuable study attempting to introduce cognitive resource theory into the field of digital reading service, which proves that users also have limited cognitive resource allocation in the process of selecting digital books.

scholarly journals Theories of Vigilance and the Prospect of Cognitive Restoration

2019 ◽  
Vol 63 (1) ◽  
pp. 1639-1643
Author(s):  
Jace Flanagan ◽  
Dan Nathan-Roberts
Keyword(s):  
Literature Review ◽  
Well Being ◽  
Resource Theory ◽  
Cognitive Resources ◽  
Vigilance Decrement ◽  
Cognitive Resource ◽  
Cognitive Resource Theory ◽  
Rest Breaks ◽  
Active Breaks ◽  
Over Time

Effectively mitigating the vigilance decrement (the decrease in performance on tasks requiring sustained attention over time) is one of the most important human factors problems studied today. Despite this, the underlying theory of vigilance and its failings are still disputed. The two primary theories espoused by researchers today are a cognitive resource theory of vigilance and a mindlessness theory of vigilance. This literature review examines the literature investigating points of conflict between these theories, revealing that the majority of experimental research supports a cognitive resource theory of vigilance. Additionally, we examine research investigating the effect of active rest breaks on cognitive and affective restoration. The literature available on cognitive restoration does not support the suggestion that active rest breaks help restore vigilance-relevant cognitive resources more effectively than passive rest breaks. The research does however, support the proposition that more active rest breaks can reduce stress and increase affect. The potential for increasing worker well-being with more active breaks warrants additional research.

Application of Information Introduced to Dynamic Message Processing and Enjoyment

2018 ◽  
Vol 30 (4) ◽  
pp. 196-206 ◽  
Author(s):  
Byungho Park ◽  
Rachel L. Bailey
Keyword(s):  
Resource Allocation ◽  
Recognition Memory ◽  
Emotional Processing ◽  
Orienting Response ◽  
Structural Features ◽  
Cognitive Resources ◽  
Coding System ◽  
Message Complexity ◽  
Cognitive Resource ◽  
Cognitive Overload

Abstract. In an effort to quantify message complexity in such a way that predictions regarding the moment-to-moment cognitive and emotional processing of viewers would be made, Lang and her colleagues devised the coding system information introduced (or ii). This coding system quantifies the number of structural features that are known to consume cognitive resources and considers it in combination with the number of camera changes (cc) in the video, which supply additional cognitive resources owing to their elicitation of an orienting response. This study further validates ii using psychophysiological responses that index cognitive resource allocation and recognition memory. We also pose two novel hypotheses regarding the confluence of controlled and automatic processing and the effect of cognitive overload on enjoyment of messages. Thirty television advertisements were selected from a pool of 172 (all 20 s in length) based on their ii/cc ratio and ratings for their arousing content. Heart rate change over time showed significant deceleration (indicative of increased cognitive resource allocation) for messages with greater ii/cc ratios. Further, recognition memory worsened as ii/cc increased. It was also found that message complexity increases both automatic and controlled allocations to processing, and that the most complex messages may have created a state of cognitive overload, which was received as enjoyable by the participants in this television context.

Vibratory weld conditioning during gas tungsten arc welding of al 5052 alloy on the mechanical and micro-structural behavior

2020 ◽  
Vol 17 (6) ◽  
pp. 831-836
Author(s):  
M. Vykunta Rao ◽  
Srinivasa Rao P. ◽  
B. Surendra Babu
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Welded Joints ◽  
Great Influence ◽  
Welding Process ◽  
Microstructural Characterization ◽  
Content Type ◽  
Average Grain Size

Purpose Vibratory weld conditioning parameters have a great influence on the improvement of mechanical properties of weld connections. The purpose of this paper is to understand the influence of vibratory weld conditioning on the mechanical and microstructural characterization of aluminum 5052 alloy weldments. An attempt is made to understand the effect of the vibratory tungsten inert gas (TIG) welding process parameters on the hardness, ultimate tensile strength and microstructure of Al 5052-H32 alloy weldments. Design/methodology/approach Aluminum 5052 H32 specimens are welded at different combinations of vibromotor voltage inputs and time of vibrations. Voltage input is varied from 50 to 230 V at an interval of 10 V. At each voltage input to the vibromotor, there are three levels of time of vibration, i.e. 80, 90 and 100 s. The vibratory TIG-welded specimens are tested for their mechanical and microstructural properties. Findings The results indicate that the mechanical properties of aluminum alloy weld connections improved by increasing voltage input up to 160 V. Also, it has been observed that by increasing vibromotor voltage input beyond 160 V, mechanical properties were reduced significantly. It is also found that vibration time has less influence on the mechanical properties of weld connections. Improvement in hardness and ultimate tensile strength of vibratory welded joints is 16 and 14%, respectively, when compared without vibration, i.e. normal weld conditions. Average grain size is measured as per ASTM E 112–96. Average grain size is in the case of 0, 120, 160 and 230 is 20.709, 17.99, 16.57 and 20.8086 µm, respectively. Originality/value Novel vibratory TIG welded joints are prepared. Mechanical and micro-structural properties are tested.

Numerical simulation of gas-solid two-phase reaction flow with multiple moving boundaries

2015 ◽  
Vol 25 (2) ◽  
pp. 375-390 ◽  
Author(s):  
Qiao Luo ◽  
Xiaobing Zhang
Keyword(s):  
Numerical Simulation ◽  
Physical Phenomenon ◽  
Great Influence ◽  
Moving Boundaries ◽  
Charge Weight ◽  
Phase Reaction ◽  
Two Phase ◽  
Content Type ◽  
One Dimensional ◽  
Chamber Volume

Purpose – In engineering applications, gas-solid two-phase reaction flow with multi-moving boundaries is a common phenomenon. The launch process of multiple projectiles is a typical example. The flow of adjacent powder chambers is coupled by projectile’s motion. The purpose of this paper is to study this flow by numerical simulation. Design/methodology/approach – A one-dimensional two-phase reaction flow model and MacCormack difference scheme are implemented in a computational code, and the code is used to simulate the launch process of a system of multiple projectiles. For different launching rates and loading conditions, the simulated results of the launch process of three projectiles are obtained and discussed. Findings – At low launching rates, projectiles fired earlier in the series have little effect on the launch processes of projectiles fired later. However, at higher launching rates, the projectiles fired first have a great influence on the launch processes of projectiles fired later. As the launching rate increases, the maximum breech pressure for the later projectiles increases. Although the muzzle velocities increase initially, they reach a maximum at some launching rate, and then decrease rapidly. The muzzle velocities and maximum breech pressures of the three projectiles have an approximate linear relationship with the charge weight, propellant web size and chamber volume. Originality/value – This paper presents a prediction tool to understand the physical phenomenon of the gas-solid two-phase reaction flow with multi-moving boundaries, and can be used as a research tool for future interior ballistics studies of launch system of multiple projectiles.

Analysis of lubrication and sealing performance on textured piston pair with multi-factor coupling

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Song Quan ◽  
Yong Guo ◽  
Xuedong Liu ◽  
Zhewu Chen ◽  
Yudi Liu
Keyword(s):  
Energy Consumption ◽  
Optimization Design ◽  
Great Influence ◽  
Diameter Ratio ◽  
Content Type ◽  
Hydraulic Impact ◽  
Sealing Performance ◽  
Lubrication Performance ◽  
Low Energy Consumption ◽  
Piston Pair

Purpose This paper aims to study the lubrication and sealing performance on the textured piston pair under the cross action of the shape and structure parameters. This paper further carries out the optimization design of low energy consumption hydraulic impact piston pair. Design/methodology/approach Based on the characteristics of the ring gap seal piston pair, the flow field analysis model of the whole film gap is established for its periodic treatment. The friction power loss of the piston pair is defined as the evaluation index of the lubrication performance and the leakage power loss as the evaluation index of the sealing performance. The orthogonal test design and CFD software were used to analyze the lubrication and sealing performance of the textured piston pair. Findings The cross action of shape and structure factors has a great influence of the lubrication and sealing performance on the textured piston pair. Clearance and shape parameters have great influence on it, while seal length and depth diameter ratio have little influence. The sealing performance of conical textured piston pair is good, while the lubrication performance of square textured piston pair is good. The primary and secondary order of influence of shape and structure on energy consumption on piston pair is B (seal clearance) > C (texture shape) > D (area ratio) > A (seal length) > E (depth diameter ratio). Originality/value Breaking the defect of local optimization design on traditional piston pair structure, then find the matching relationship of structural parameters on textured piston pair. Further improve the lubrication and sealing performance of the piston pair, and provide reference for the global optimization design of the low energy consumption hydraulic impact piston pair.

Reading in the age of digital distraction

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ziming Liu
Keyword(s):  
College Students ◽  
Design Methodology ◽  
Female Students ◽  
Digital Content ◽  
Future Research ◽  
Common Phenomenon ◽  
Digital Environment ◽  
Digital Reading ◽  
Content Type ◽  
Screen Reading

PurposeDigital distraction is a common phenomenon in e-reading contexts, and it is worth exploring in depth from the perspectives of information (digital content), users (readers) and technology (digital reading medium). Since screen reading has close links with multitasking and potential distraction, any investigation of reading in the digital environment must factor in this reality. This paper aims to investigate the extent and effects of digital distraction while reading on screens. Special emphases go to exploring multitasking while reading.Design/methodology/approachSurvey and analysis methods are employed.FindingsThe extent of digital distraction among college students it found is alarming. All the top four sources of distraction are communication-based activities. Female students tend to concentrate more than males when they read on screens. An overwhelming majority of participants choose to read in print to reduce distractions and to concentrate effectively. Screen reading is inherently distracting, primarily due to multitasking. It appears that repeated multitasking during academic endeavors carries substantial costs.Originality/valueImplications of digital distraction are discussed, and directions of future research are suggested.

Firm CSR implementation and societal moral degradation

2018 ◽  
Vol 12 (3) ◽  
pp. 608-619 ◽  
Author(s):  
Zhiqiang Li ◽  
Qinqin Zheng
Keyword(s):  
Design Methodology ◽  
Transition Economy ◽  
Choice Theory ◽  
Great Influence ◽  
Hierarchical Regression ◽  
Business Sector ◽  
Content Type ◽  
Strategic Csr ◽  
Corporate Social ◽  
Practical Implications

PurposeThis paper aims to examine how firms respond to societal moral degradation in a transition economy from the corporate social responsibility (CSR) perspective.Design/methodology/approachBased on a survey of 302 firms operating in China and using hierarchical regression, this study explores the effect of societal moral degradation on firm CSR implementation.FindingsThe study finds that the amount of CSR performed by firms in a transition market will reduce when they face increased moral degradation in the business field. The authors also find that CSR philanthropy is more significantly deterred by societal moral degradation than CSR sustainability.Practical implicationsThese findings reveal that firms conducting CSR initiatives need to strategically consider the great influence of environment. Meanwhile, strategic CSR decisions should be fully aware of the different characters of different CSR forms.Originality/valueThis paper draws on the strategic choice theory and contributes to understanding of the influence of specific environmental factors in transition economies on CSR implementation. Based on two main categories of CSR, this study develops a framework that explores how firms choose different CSR forms when they encounter severe moral degradation in business sector.

Restart tourism | build the future

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Rita Marques
Keyword(s):  
Value Chain ◽  
Great Influence ◽  
Point Of View ◽  
Political Community ◽  
Data Systems ◽  
Scientific Publications ◽  
Economic Point ◽  
Content Type ◽  
The Future ◽  
The Impact

PurposeThis viewpoint aims to explore the question: How can we restart and monitor the path towards the tourism of the future?Design/methodology/approachThis paper identifies the progress made at scientific, institutional, political and technological levels, and how it is possible to foresee that we will enter in a new era of tourism indicators.FindingsA significant body of literature clearly demonstrates that tourism cannot be viewed simply from an economic point of view as it has a great influence on sociocultural and environmental dimensions. The impact of tourism and how to ensure its long-term success has been invoked for the last few decades, leading to the direct consideration of sustainability indicators in a wide array of scientific publications. However, despite significant advances, the lack of funding, lack of support or interest from the political community, bureaucracies or lack of methodological guidance and of technical skills along the entire value chain pose clear challenges to the development and adoption of wide data systems to support sustainable tourism policies.Originality/valueThe paper sheds light on the Portuguese position regarding the recovery of the tourism sector in the aftermath of the COVID-19 pandemic. It also highlights the commitment to knowledge and monitoring of sustainability in tourism, articulated at international level, and how this is essential in order to make progress and to overcome the challenges facing the sector. At the same time, it demonstrates how fundamental it is to identify solutions to boost the potential of tourism as an economic, social, environmental and cultural phenomenon.

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