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The purpose of this paper is to report on a case study that was conducted in a Japanese elementary school in order to examine what kinds of teachers’ discourse support the professional development of teachers in lesson study.

This research employed an intensive case study design that primarily focused on teachers’ discourse in post‐lesson conferences held at the school. In addition, it relied on a variety of ethnographic data obtained over a two‐year period. To scrutinise teachers’ professional development, the authors selected two cases where the research lessons were conducted by the same teacher.

The teachers’ discourse in the lesson study can be classified into the following six discursive modes: (A) Simple question and answer (B) Is the alternative teaching approach better? (C) What is the best way of teaching X? (D) Did the children learn what the teacher intended them to? (E) Did the teacher teach what the children actually learned? and (F) What did the teacher learn from watching the children learn? The research teacher’s tasks for developing as a teaching professional were elicited from her colleagues’ discourse, which was characterised by the discursive modes (E) and (F).

This study illuminated the nature of teachers’ professional discourse from the viewpoint of discursive modes in a Japanese lesson study. The discursive modes (B), (C) and (D) were classified as problem‐solving discourse in the context of given problems; the discursive modes (E) and (F) were classified as problem‐setting discourse.

The purpose of this study is to propose a torque vectoring control system for improving the handling stability of distributed drive electric buses under complicated driving conditions. Energy crisis and environment pollution are two key pressing issues faced by mankind. Pure electric buses are recognized as the effective method to solve the problems. Distributed drive electric buses (DDEBs) as an emerging mode of pure electric buses are attracting intense research interests around the world. Compared with the central driven electric buses, DDEB is able to control the driving and braking torque of each wheel individually and accurately to significantly enhance the handling stability. Therefore, the torque vectoring control (TVC) system is proposed to allocate the driving torque among four wheels reasonably to improve the handling stability of DDEBs.

The proposed TVC system is designed based on hierarchical control. The upper layer is direct yaw moment controller based on feedforward and feedback control. The feedforward control algorithm is designed to calculate the desired steady-state yaw moment based on the steering wheel angle and the longitudinal velocity. The feedback control is anti-windup sliding mode control algorithm, which takes the errors between actual and reference yaw rate as the control variables. The lower layer is torque allocation controller, including economical torque allocation control algorithm and optimal torque allocation control algorithm.

The steady static circular test has been carried out to demonstrate the effectiveness and control effort of the proposed TVC system. Compared with the field experiment results of tested bus with TVC system and without TVC system, the slip angle of tested bus with TVC system is much less than without TVC. And the actual yaw rate of tested bus with TVC system is able to track the reference yaw rate completely. The experiment results demonstrate that the TVC system has a remarkable performance in the real practice and improve the handling stability effectively.

In view of the large load transfer, the strong coupling characteristics of tire , the suspension and the steering system during coach corning, the vehicle reference steering characteristics is defined considering vehicle nonlinear characteristics and the feedforward term of torque vectoring control at different steering angles and speeds is designed. Meanwhile, in order to improve the robustness of controller, an anti-integral saturation sliding mode variable structure control algorithm is proposed as the feedback term of torque vectoring control.

This study examines the relationship between teacher leadership and learning in lesson study (LS).

A multilevel analysis of data was conducted based on the results of a questionnaire survey of 129 teachers collected through Google forms from 27 schools in the city.

First, in the sample, leadership and learning perceptions in LS did not differ depending on the school that teachers belonged to but appeared as a difference between teachers who perceived leadership and learning within their school and those who did not. Second, the influence of leadership on learning perceptions in the LS was found to be different depending on the socialization, externalization, combination and internalization phase. Third, the results suggested that principals should provide leadership supporting the research team’s leadership.

Previous research on LS has not focused on the relationship between the principal’s leadership and teacher learning. The findings of this study are significant both academically and practically, as they suggest in what settings of LS leadership can work effectively for teacher learning.

This study aims to examine the impact of managers’ inclusive leadership (IL) on knowledge-sharing (KS) behavior. Additionally, the authors consider the cross-level moderation effect of diversity in the biological sex of employees on the relationship between IL and employee KS behaviors.

A two-wave questionnaire survey was conducted in a large Japanese company. The sample included 827 employees (254 men and 573 women) in 129 groups. The authors, then, conducted a cross-level analysis using hierarchical linear modeling (HLM).

IL promotes two types of KS among employees: knowledge donating (KD) and knowledge collecting (KC). Additionally, the moderating effects of employee biological-sex diversity on the relationship between IL and KS varied according to the KS type. IL had a positive effect on KD only in groups with higher biological-sex diversity, and did not affect groups with lower biological-sex diversity. Biological-sex diversity did not moderate the relationship between IL and KC.

This study has practical implications, especially for personnel departments with high diversity in employees’ biological sex. Further, to improve employees’ KS behaviors, it may be important to develop managers’ IL skills.

This is the first study that explores the relationship between IL and KS and the first to provide evidence of the moderating effect of diversity of employee’s biological sex.

This study aims to investigate the relationship between market share and rent levels to understand the supply structure in the Japanese private rental housing market.

The study calculates the municipal-level market share of a dominant rental housing operator in Japan and ascertained the overall market rent and the dominant operator’s rent premium at the municipal level by using a major web portal’s listing data of rental houses.

The study shows that, as market share increased, overall market rent tends to decrease, and analyzed by market share, there is no significant difference between the rent of the dominant operator and the overall market rent.

The results of the study suggest that dominant operators may have lowered the rent of their own property to prioritize filling vacancies, which, in turn, causes the overall level of market rent to decline. This is an outcome of rental housing operators’ strategy to maximize long-term rental income under sublease contracts with individual owners, which ensures stable rental income for owners regardless of the occupation status of the apartments.

Previous research on regional monopolies in mortgage sales and brokerage businesses in the USA implies that rental housing operators in a position of great influence over the market can control and keep the market rents at high levels, that is, at large costs for consumers. The findings of the study are novel in showing the inverse relationship in the Japanese private rental market.

The purpose of this paper is to propose a seamless autonomous navigation method based on the motion constraint of the mobile robot, which is able to meet the practical need of maintaining the navigation accuracy during global positioning system (GPS) outages.

The seamless method uses the motion constraint of the mobile robot to establish the filter model of the system, in which the virtual observation about the speed is used to overcome the shortage of the navigation accuracy during GPS outages. The corresponding motion constraint model of the mobile robot is established. The proposed seamless navigation scheme includes two parts: the micro inertial navigation system (MINS)/GPS-integrated filter model and the motion constraint filter model. When the satellite signals are good, the system works on the MINS/GPS-integrated mode. If some obstacles block the GPS signals, the motion constraint measurement equation will be effective so as to improve the navigation accuracy of the mobile robot.

Three different vehicle tests of the mobile robot show that the seamless navigation method can overcome the shortage of the navigation accuracy during GPS outages, so as to improve the navigation performance in practical applications.

A seamless navigation system based on the motion constraint of the mobile robot is proposed to overcome the shortage of the navigation accuracy during GPS outages, thus improving the adaptability of the robot navigation.