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The purpose of this study is to address the low localization accuracy and frequent tracking failures of traditional visual SLAM methods in low-light and weak-texture situations, and we propose a mobile robot visual-inertial localization method based on the improved point-line features VINS-mono algorithm.

First, the line feature information is introduced into VINS-mono. Subsequently, the EDlines line feature extraction algorithm is optimized with a short line merging strategy and a dynamic length suppression strategy to reduce redundant short lines and fragmented segments. In the back-end sliding window optimization, line feature reprojection errors are incorporated, and Huber kernel functions are added to the inertial measurement unit residuals, point-line feature residuals and loop closure constraints to reduce the impact of outliers on the optimization results.

Comparison and verification experiments are carried out on the EuRoC MAV Data set and real weakly textured environment. In the real low-light and weak-texture scenarios, the improved mobile robot localization system achieves over 40% higher accuracy compared to VINS-mono.

The main contribution of this study is to propose a new visual-inertial SLAM method combining point-line features, which can achieve good localization effect in low-light and weak-texture scenes, with higher accuracy and robustness.

For robots to more actively interact with the surrounding environment in object manipulation tasks or walking, they must understand the physical attributes of objects and surface materials they encounter. Dynamic tactile sensing can effectively capture rich information about material properties. Hence, methods that convey and interpret this tactile information to the user can improve the quality of human–machine interaction. This paper aims to propose a visual-tactile cross-modal retrieval framework to convey tactile information of surface material for perceptual estimation.

The tactile information of a new unknown surface material can be used to retrieve perceptually similar surface from an available surface visual sample set by associating tactile information to visual information of material surfaces. For the proposed framework, the authors propose an online low-rank similarity learning method, which can effectively and efficiently capture the cross-modal relative similarity between visual and tactile modalities.

Experimental results conducted on the Technischen Universität München Haptic Texture Database demonstrate the effectiveness of the proposed framework and the method.

This paper provides a visual-tactile cross-modal perception method for recognizing material surface. By the method, a robot can communicate and interpret the conveyed information about the surface material properties to the user; it will further improve the quality of robot interaction.

This paper aims to study the synergistic lubrication effects of Sn–Ag–Cu and MXene–Ti₃C₂ to improve the tribological properties of M50 bearing steel with microporous channels.

M50 matrix self-lubricating composites (MMSC) were designed and prepared by filling Sn–Ag–Cu and MXene–Ti₃C₂ in the microporous channels of M50 bearing steel. The tribology performance testing of as-prepared samples was executed with a multifunction tribometer. The optimum hole size and lubricant content, as well as self-lubricating mechanism of MMSC, were studied.

The tribological properties of MMSC are strongly dependent on the synergistic lubrication effect of MXene–Ti₃C₂ and Sn–Ag–Cu. When the hole size of microchannel is 1 mm and the content of MXene–Ti₃C₂ in mixed lubricant is 4 wt.%, MMSC shows the lowest friction coefficient and wear rate. The Sn–Ag–Cu and MXene–Ti₃C₂ are extruded from the microporous channels and spread to the friction interface, and a relatively complete lubricating film is formed at the friction interface. Meanwhile, the synergistic lubrication of Sn–Ag–Cu and MXene–Ti₃C₂ can improve the stability of the lubricating film, thus the excellent tribological property of MMSC is obtained.

The results help in deep understanding of the synergistic lubrication effects of Sn–Ag–Cu and MXene–Ti₃C₂ on the tribological properties of M50 bearing steel. This work also provides a useful reference for the tribological design of mechanical components by combining surface texture with solid lubrication.

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-12-2023-0381/

Personal lifestyle, work environments and work-related factors can significantly affect occupant productivity. Although many studies examine the affecting factors of occupant productivity in offices, explorations for the home-based work environment, which is designed mainly for living purposes, are still scarce. Moreover, current pandemic has made work from home a new normal for workers around the world. Therefore, it is important to identify key causal factors of occupant productivity when working from home.

This study employed descriptive analysis and regression analysis method to explore the relationship among personal lifestyle, indoor environmental quality and work-related factors toward occupant productivity. A questionnaire including a comprehensive list of key measures was designed and 189 valid responses were collected from more than 13,000 participants.

Results show that a healthy lifestyle, the perceived satisfaction of visual and acoustic environment, communication, interest in work, workload, flexible schedule and privacy positively affect occupant productivity when working from home, while coffee consumption, outside views and windows have negative effect.

Opportunities to enhance occupants' home-based work productivity include developing a healthy lifestyle by taking advantage of flexible schedule, equipping a working room at home with advanced and intelligent environment control systems, and improving communication, workload and schedule by changing the policy of companies.

The purpose of this paper is to explore the tensions between external accountability obligations, educator's professional values, and student needs. Strategic, cognitive, and moral dimensions of this tension are captured with the central category of integrity.

This is a mixed methods study that compares five exceptionally high performing middle schools with four exceptionally low performing middle schools in the state of California (USA), controlling for demographics, school context factors, and below average performance range.

It is found that schools under similar circumstances differ on the degree of integrity. Schools with high integrity have a good balance between values and reality, are more cohesive and more open to dissent. In each case, integrity was associated with an expansion of agency that combined moral earnestness with prudent strategizing and actively constructing interpretive frames that maintained a school's sense of self‐worth. Integrity develops or survives with a good dose of educational leaders’ personal strength, but also depends on leaders’ insistence to fully exhaust the moral horizon of an institution which obligates educators to balance equity, system efficiency, child‐centeredness and professionalism with prudence.

This is a case study of nine schools in one state. Explanatory relationships can be explored, but not generalized.

The research has implications for leadership. It demonstrates the power of integrity as a key virtue of leadership under accountability pressures. It shows the different ways integrity can be forged in schools and the different ways it can be missed with consequences for school life.

The paper stresses the point that it is quite conceivable that ideological zeal, Machiavellian strategizing, or eager system conformism may produce more forceful agency than integrity. But as everyday responses they are not as realistic, ethical or productive as the striving for integrity.

The practitioner literature often points to integrity as a desirable quality when dealing with tensions of the sort addressed in this paper, but little systematic theoretical thinking and empirical exploration of this concept exists. The paper makes an advance in both areas.

Based on exchange theory and the generalized norm of reciprocity, psychological contracts perceived by employees are believed to have dysfunctional consequences for organizations if breached. This paper aims to study the willingness of employees to report fraud, as such is an important aspect of internal control for organizations.

A 2 × 2 between-subjects experiment was conducted in which 99 participants with diverse accounting backgrounds were first asked questions about their preconceived beliefs (psychological contract) regarding how reports of unethical conduct would be managed, and their reaction if these beliefs were broken (psychological contract violation). Participants were given a hypothetical situation of fraud and then asked to indicate their likelihood of reporting fraud to a supervisor.

The main hypotheses are that employees will be less likely to report fraud when the organization fails to signal the presence of a positive ethical environment or when management reacts weakly to previous reports of unethical activity. The data and findings support these hypotheses. Additional testing also reveals that a psychological contract violation mediates the relationship between the outcome of previous reports and the intention to report fraud.

As with any experimental study, this study’s results come with limitations. Reading an overly simplistic scenario that omits real world details and providing intention to report is very different from actually reporting fraud in one’s own place of employment. Therefore, reporting intentions may vary from actual reporting behavior. Further, reporting motivation (self-defense, altruism, etc.) and concern over retaliation are not measured.

Employees have expectations surrounding ethical corporate environments. Psychological contract violations occur as a result of broken expectations and are common in the workforce. In this study, a breakdown in the internal control environment because of a poor ethical culture, caused an even greater breakdown in internal controls because of employees’ decreased reporting intentions.

Psychological contract violations impact employees’ intention to report fraud. These violations need to be understood so that additional measures and safeguards can be instituted when employees are not acting as a fraud defense or detection mechanism. During such times when there is a breakdown in this type of internal control (that is, when employees might be hesitant to report fraud), extra safeguards against fraud, additional procedures to detect fraud, and enhanced employee training encouraging reporting of suspected unethical conduct, become even more important.

Strong experimental methods provide a rigorous way to evaluate a problem of our day: job insecurity caused by rampant organizational turbulence. The hidden cost is expressed in terms of how less can be expected of employees as a first line of defense against fraud.

The African continent is filled with a textured history, vast resources, and immense opportunity. The landscape of higher education on such a diverse continent is extensive and complex. In this review of the landscape, four primary topics are evaluated. The historical context is the foundational heading, which briefly covers the evolution from colonization to independence and the knowledge economy. The second main heading builds upon the historical context to provide an overview of the numerous components of higher education, including language diversity, institutional type, and access to education. A third section outlines key challenges and opportunities including finance, governance, organizational effectiveness, and the academic core. Each of these challenges and opportunities is interconnected and moves from external influences (e.g., fiscal and political climate) to internal influences (e.g., administrative leadership and faculty roles). The last layer of the landscape focuses on leveraging higher education in Africa for social and economic progress and development. Shaping a higher education system around principles of the public good and generating social benefits is important for including postsecondary institutions in a development strategy.

The long controversy that has waxed furiously around the implementation of the EEC Directives on the inspection of poultry meat and hygiene standards to be observed in poultry slaughterhouses, cutting‐up premises, &c, appears to be resolved at last. (The Prayer lodged against the Regulations when they were formally laid before Parliament just before the summer recess, which meant they would have to be debated when the House reassembled, could have resulted in some delay to the early operative dates, but little chance of the main proposals being changed.) The controversy began as soon as the EEC draft directive was published and has continued from the Directive of 1971 with 1975 amendments. There has been long and painstaking study of problems by the Ministry with all interested parties; enforcement was not the least of these. The expansion and growth of the poultry meat industry in the past decade has been tremendous and the constitution of what is virtually a new service, within the framework of general food inspection, was inevitable. None will question the need for efficient inspection or improved and higher standards of hygiene, but the extent of the organization in the first and the enormous cost of structural and other alterations to premises in the second, were seen as formidable tasks, and costly. The execution and enforcement of the new Regulations is assigned to local authorities (District, Metropolitan and London Borough Councils), who are empowered to make charges for inspection, licences, etc., to recoup the full costs of administration. The Government had previously promised that the cost of this new service, which when fully operative, will be significant, would not fall upon the already over‐burdened economies of local authorities. The figure of a penny per bird is given; in those areas with very large poultry processing plants, with annual outputs counted in millions of birds, this levy should adequately cover costs of enforcing the Regulations, but there are many areas with only one of a few small concerns with annual killings of perhaps no more than 200,000 birds—this much we know from perusing annual health reports received at the offices of this Journal—and the returns from charges will certainly be inadequate to cover the cost of extra staff. The Regulations require the appointment of “official veterinary surgeons” and “poultry meat inspectors”, both new to local government.

The purpose of this research is to investigate how secondary school teachers adaptively make use of the classroom learning environment. The approach illustrates the intimate relationship between teaching style, learning style and the adaptive use of space as well as the preferences for different learning environments.

A multi method study approach was used to carry out the research. Two main methods were used in the study. In the first method, trainee teachers recorded spatial observations (mapping). Maps of the chemistry classrooms were produced. The observers marked all fixed, semi‐fixed and flexible elements in the classroom space. The second method involved two questionnaires. The first questionnaire (Principles of Adult Learning Scale (PALS)) was used to identify and describe teachers' teaching styles. The second questionnaire (Questionnaire of the Classrooms' Physical Properties) was used by trainee teachers acting as observers. It consists of a set of items that enable the evaluation of classroom quality related to specific physical properties. Research data were collected from ten secondary schools (upper level of the Polish secondary schools) in five cities located in South‐West part of Poland.

The results suggest that the traditional row and column classroom seating arrangement was dominant. It was found that teaching styles could be identified determined using factors identified using the PALS scale. Teachers generally perceived their own learning environment as more teacher‐centered or more student‐centered. Their teaching styles were combinations of student‐centered and teacher‐centered activity.

The research has practical significance in that it had developed a questionnaire that can be used by students and teachers to monitor the quality of physical classrooms environments and provide guidelines for the improvement of learning spaces.

The application of the multi‐method described in this study creates possibilities for a deeper understanding of secondary school classroom environments. A structured data collection system was valuable for the trainee teachers. They acquired a useful knowledge of classroom management and how to create effective learning environments, during the professional practice period. Trainee teachers gain awareness that would enable them to make changes to the classroom environment as an adaptive resource.

Introduces the fourth and final chapter of the ISEF 1999 Proceedings by stating electric and magnetic fields are influenced, in a reciprocal way, by thermal and mechanical fields. Looks at the coupling of fields in a device or a system as a prescribed effect. Points out that there are 12 contributions included ‐ covering magnetic levitation or induction heating, superconducting devices and possible effects to the human body due to electric impressed fields.