Search results

This study aimed to develop a method to calculate the mattress indentation for further estimating spinal alignment.

A universal indentation calculation model is derived based on the system theory, and the deformation characteristics of each component are analyzed by the finite element (FE) model of a partial air-spring mattress under the initial air pressure of 0.01–0.025 MPa. Finally, the calculation error of the model is verified.

The results indicate that the indentation calculation model could describe the stain of a mattress given the load and the constitutive model of each element. In addition, the FE model of a partial air-spring mattress can be used for further simulation analysis with an error of 1.47–3.42 mm. Furthermore, the deformation of the series system is mainly contributed by the air spring and the components directly in contact with it, while the top component is mainly deflection deformation. In addition, the error of the calculation model is 2.17–5.59 mm on the condition of 0.01–0.025 MPa, satisfying the engineering application. Finally, the supine spinal alignment is successfully extracted from the mattress indentation.

The limitation of this study is that it needs to verify the practicality of the indentation calculation model for the Bonnier spiral spring mattress. The main feature of the Bonnier spring mattress is that all springs are connected, so the mattress deflection and neighborhood effect are more significant than those of the air-spring mattress. Therefore, the applicability of the model needs to be tested. Moreover, it is worth further research to reduce the deformation error of each component.

As part of the series of studies on the intelligent air-spring mattress, the indentation-based evaluation method of spinal alignment in sleep postures will be studied for hardness and intelligent regulation based on this study.

The results of this research are ultimately used for the intelligent adjustment of air-spring mattresses, which automatically adjusts the hardness according to the user's sleep postures and spinal alignment, thus maintaining optimal spinal biomechanics. The successful application of this result could improve the sleep health of the general public.

Based on the series system theory, an indentation calculation model for mattresses with arbitrary structure is proposed, overcoming the dependence of parameters on materials and their combinations when fitting the Burgers model. Further, the spinal alignment in supine posture is extracted from the indentation, laying a theoretical foundation for further recognition and adjustment of the spinal alignment of the intelligent mattress.

The purpose of this paper is twofold: first, to develop a visualized search system utilizing graphical images to represent the story elements and concepts to help elementary students describe and seek their desired storybooks; and second, to explore the effect of the proposed visualized search system on elementary students’ tactics, success, and motivation for seeking storybooks.

A quasi-experimental approach was conducted with a sample of 61 elementary students in this study. The students’ tactics, motivation and the success of their storybook searching were addressed as dependent variables for further comparisons of the visualized searching system and a conventional keyword searching system.

The results revealed that the students in the experimental group exhibited more frequent tactics and greater motivation for storybook searching than those in the control group. Further χ² analysis indicated a significant relationship between the searching interface and the success of the students’ storybook searching.

This paper proposes a new visual search approach which allows young children to search for storybooks by describing an intended storybook in terms of its characters, objects, or the background colors of the cover page. The findings provide some evidence of the effectiveness of the visualized searching interface in terms of promoting young children’s learning through storybook searching and reading activities.

The purpose of this paper is to explore the impact of the sequential combination of consumer experiences on product knowledge and brand attitude. Additionally, the moderating role of desire for unique consumer products (DUCP) was also discussed.

Four types of sequential combinations of consumer experiences were designed: exposure to escapist virtual experience preceding direct experience (VEescapist→DE), exposure to education virtual experience preceding direct experience (VEeducation→DE), exposure to escapist virtual experience preceding indirect experience (VEescapist→IDE), and exposure to education virtual experience preceding indirect experience (VEeducation→IDE). A total of 302 undergraduate college students in Taiwan participated in this study.

The results revealed that DUCP moderated the sequential combination of consumer experiences on product knowledge. For the high level of DUCP, there are significant differences among the effects of the sequential combination of consumer experiences on product knowledge. Specifically, it was found that VEescapist→IDE produces the highest product knowledge while VEeducation→DE produces the lowest product knowledge. Regarding the low level of DUCP, there are not significant differences among the effects of sequential combination of consumer experiences on product knowledge.

This study extended the studies of Daugherty et al. (2008), Pine and Gilmore (1999), and Keng et al. (2012) to further explore the effects of the sequential combination of experiences.

The purpose of this paper is to explore how young children interact with a visualized search interface to search for storybooks by assembling the provided visual searching items and to explore the difference in visual search behaviours and strategies exhibited by pre-schoolers and second-graders.

The visualized search interface was used to help young children search for storybooks by dragging-and-dropping story characters, scene objects and colour icons to perform search queries. Twenty pre-schoolers and 20 second-graders were asked to finish a search task through the visualized search interface. Their activities and successes in performing visual searches were logged for later analysis. Furthermore, in-depth interviews were also conducted to research their cognitive strategies exhibited while formulating visual search queries.

Young children with different grades adopted different cognitive strategies to perform visual searching. In contrast to the pre-schoolers who performed visual searching by personal preference, the second-graders could exercise visual searching accompanied with relatively high-order thinking. Young children may also place different foci on the storybook structure to deal with conditional storybook queries. The pre-schoolers tended to address the characters in the story, whereas the second-graders paid much attention to the aspects of scene and colour.

This paper describes a new visual search approach allowing young children to search for storybooks by describing an intended storybook in terms of its characters, scenes or the background colours, which provides valuable indicators to inform researchers of how pre-schoolers and second-graders formulate concepts to search for storybooks.

The purpose of the study is to establish the relationship between public health sector performance (PHSP), fleet management system, perceived service quality (PSQ) and management style (MS).

A total of 260 managerial employees were randomly selected from 5 major public hospitals in Zimbabwe to participate in this cross-sectional survey.

Fleet management system was found to positively influence both PSQ and PHSP. The results indicated that PSQ has a positive effect on PHSP. MS was found to moderate the effect of fleet management system on both PSQ and PHSP.

The current study provides fresh insights and validates extant knowledge on PHSP, fleet management and PSQ within the public health sector departments. It extends further knowledge on the public health performance in the Sub-Saharan region, as it shows that dimensions on fleet management have a direct influence on PHSP.

This study aims to examine how change in white college students’ beliefs about race over the course of a semester impacted their interactions with diverse others. While there is an increasing interest in understanding people's beliefs about race, there has been limited research examining how people’s beliefs about race can and do change over time and how education can facilitate this change.

White students (N = 98) at a predominantly white college completed a multidimensional racial essentialism measure and measures of both self-report and behavioral interactions with diversity, at the beginning and end of a semester. Multilevel modeling with time-varying predictors was used to examine how change in beliefs about race related to change in diversity interactions.

The impact of racial essentialism on student diversity interaction varied considerably depending on the type of racial essentialism. Higher levels of speciation and genotypic essentialism at Time 1 were related to lower interaction with diversity at Time 2. Decreases in phenotypic essentialism were concurrent with increases in diversity interaction over the duration of the semester. For a subgroup of students enrolled in a race and diversity course, unexpectedly, decreases in genotypic essentialism were concurrent with decreases in diversity interaction.

By using a multidimensional model of beliefs about race with a longitudinal assessment, this study contributes to our understanding of how specific components of beliefs about race change over time and how change in these beliefs occurs concurrently with students’ diverse interactions. The findings are discussed in relation to the impact of education on students’ peer interactions with diverse others, with specific implications for race and diversity pedagogy.

The purpose of this paper is to provide an overview on the state of the field in intercultural dynamics on competition and cooperation at the individual, team, and organizational levels. The authors integrate previous studies from multiple disciplines to articulate the contextual importance of intercultural dynamics. The authors also suggest three overarching themes to expand the field of research on intercultural dynamics.

The authors use an integrative literature review to articulate the importance of intercultural dynamics, provide an introduction to the new contributions in this special issue, and propose new directions for future research.

Intercultural dynamics research has the potential to expand in three overarching areas: constructive controversy, collaborative communication, and global competency and identity at multiple levels.

Intercultural dynamics is still a nascent field emerging from cross-cultural and strategic management. The authors hope the review lays the groundwork for more studies on intercultural dynamics at the interpersonal, team, organizational, and mixed levels of analysis in both theory building and empirical works.

Understanding intercultural dynamics in competition and cooperation can help individuals and managers in multinationals and born global organizations navigate cultural complexity and foster cooperation.

The authors hope the ideas on intercultural dynamics can facilitate collaboration and reduce conflict in intercultural encounters at the individual, organization, and societal levels.

This paper offers an overview on the state of the field and lays groundwork for more systematic inquiries on intercultural dynamics in competition and cooperation.

The purpose of this paper is to establish a dynamic analysis model of composite cylindrical roller bearings, investigate the effects of different working conditions on the kinematic characteristics of composite bearings and compare the differences between them and solid roller bearings.

This paper establishes a dynamic analysis model for composite cylindrical roller bearings and proves the correctness of the established model by establishing dynamic vibration experiments and contact theory for composite roller bearings. Comparative analysis was conducted on the effects of coupling changes in rotational speed, load, number of rollers and filling ratio on parameters such as bearing static stiffness, contact stress and vibration acceleration.

The composite roller can enhance the bearing’s operational stability and minimize contact stress, but that a higher filling ratio is going to increase the bearing’s stiffness. The acceleration degree of bearing vibration, the load on the outer raceway nodes and the bearing stability all decrease as inner ring speed rises.

A dynamic calculation model of composite cylindrical roller bearings is established, and the influence of multiparameter coupling changes on bearing vibration and contact is studied, which lays a foundation for the structural improvement of the bearings.