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Attitude and heading are very important measurements on board aircraft. In modern solutions they are measured by the attitude and heading reference system (AHRS). In some small unmanned systems, the GPS track angle is used for heading corrections instead of the magnetometer; then, the system measures the track angle instead of heading. With a temporary lack of correction signals, the measurement error increases very quickly. Similarly, a quick increase in the measurement error is observed when a magnetic heading sensor used for correction stops working properly. This study aims to propose measurement of the roll angle for yaw angle correction.

AHRS algorithms were designed; typical maneuvers were analyzed. The method was verified by simulation and in flight testing analysis. For quantitative analyses, a performance index was proposed.

The method enables reduction of the yaw angle error caused by the gyros bias error. This study presents the idea, results of simulations and flight testing data analysis and discusses advantages and limitations of the presented method.

The presented methodology can be implemented in AHRS systems for manned and unmanned aircraft.

This study enables more accurate measurement of the yaw angle in the case of missing correction signals.

The purpose of this paper is to present a comparative study of flight circumstances, dynamic stability characteristics and controllability for two transport aircraft in severe atmospheric turbulence at transonic cruise flight for the purpose to obtain the prevention concepts of injuries to passengers and crew members for pilot training in International Air Transport Association (IATA) – Loss of Control In-flight (LOC-I) program.

A twin-jet and a four-jet transport aircraft encountering severe atmospheric turbulence are the study cases for this paper. The nonlinear unsteady aerodynamic models are established through flight data mining and the fuzzy-logic modeling technique based on the flight data of flight data recorder. This method can be adopted to examine the influence of horizontal wind shear and crosswind on loss of control, dynamic stability characteristics and controllability for transport aircraft in different weights and different sizes in tracking aviation safety of existing different types of aircraft.

The horizontal wind shear or crosswind before the turbulence encounter will easily induce rolling motion and then initiate the sudden plunging motion during the turbulence encounter. The roll rate will increase the oscillatory rolling motion during plunging motion, if the rolling damping is insufficient. The drop-off altitude will be enlarged by the oscillatory rolling motion during the sudden plunging motion.

A lack of the measurement data of vertical wind speed sensor on board to verify the estimated values of damping term is one of the research limitations for this study. The fact or condition of being severe in sudden plunging motion can be judged through the analysis of oscillatory derivatives with both dynamic stability and damping terms.

The roll rate will increase the oscillatory rolling motion during plunging motion, if the rolling damping is insufficient. The drop-off altitude will be enlarged by the oscillatory rolling motion during the sudden plunging motion. The horizontal wind shear or crosswind before the turbulence encounter will easily induce rolling motion and then initiated the sudden plunging motion during the turbulence encounter. If the drift angle is large, to turn off the autopilot of yaw control first and stabilize the rudder by the pedal. When passing through the atmosphere turbulence area, the pilots do not need to amend the heading angle urgently.

The flight safety prevention in avoidance of injuries for passengers and cabin crews is essential for the airlines. The horizontal wind shear or crosswind before the turbulence encounter will easily induce rolling motion and then initiated the sudden plunging motion during the turbulence encounter.

The flight safety prevention in avoidance of injuries for passengers and cabin crews is essential. The present assessment method is an innovation to examine the loss of control problems of aviation safety and promote the understanding of aerodynamic responses of the jet transport aircraft. It is expected to provide a valuable lecture for the international training courses for IATA – LOC-I program after this paper is being published.

Docking technology plays a crucial role in enabling long-duration operations of autonomous underwater vehicles (AUVs). Visual positioning solutions alone are susceptible to abnormal drift values due to the challenging underwater optical imaging environment. When an AUV approaches the docking station, the absolute positioning method fails if the AUV captures an insufficient number of tracers. This study aims to to provide a more stable absolute position visual positioning method for underwater terminal visual docking.

This paper presents a six-degree-of-freedom positioning method for AUV terminal visual docking, which uses lights and triangle codes. The authors use an extended Kalman filter to fuse the visual calculation results with inertial measurement unit data. Moreover, this paper proposes a triangle code recognition and positioning algorithm.

The authors conducted a simulation experiment to compare the underwater positioning performance of triangle codes, AprilTag and Aruco. The results demonstrate that the implemented triangular code reduces the running time by over 70% compared to the other two codes, and also exhibits a longer recognition distance in turbid environments. Subsequent experiments were carried out in Qingjiang Lake, Hubei Province, China, which further confirmed the effectiveness of the proposed positioning algorithm.

This fusion approach effectively mitigates abnormal drift errors stemming from visual positioning and cumulative errors resulting from inertial navigation. The authors also propose a triangle code recognition and positioning algorithm as a supplementary approach to overcome the limitations of tracer light positioning beacons.

This paper aims to tentatively explore the benefits of placing art’s knowledge-building tradition, with its capacity to disrupt and reframe, at the centre of how we look at alternative organizing and alternative economic spaces, positioning lived experience, its uncertainties intact, at the heart of researching and practicing social enterprise (SE).

The paper explores indeterminacy through two case-study narratives, one of an academic arts-based research project and the other of a unique organization it encountered.

The paper describes the way juxtaposition, encounter and drift value indeterminacy as central to generative processes, challenging the control central to management and its research.

The paper proposes that adopting an arts-based approach that challenges control can create a research instrument sensitive to similar tendencies in case studies, thus highlighting what is different and alternative about them. This responds to concerns about the diminishing centrality of SE’s democratizing ethic expressed in its scholarship, about creativity in its research and about its socially transformative potential.

The practice, by SEs of an approach welcoming chance, encounter, meandering paths and place-making with porous boundaries, proliferates transformative possibilities and is linked to democratization and participation.

Though dangerously challenging to accepted notions of academic rigour, this paper proposes an unusual thought experiment tied in with lived experiences, in themselves experimental in practice.

This commentary aims to identify the myopic drift of the marketing discipline and to opine on the areas in which the leadership of service scholars is needed. The authors identify specific areas where the input of service scholars is needed to enable the discipline to better contribute to users, providers, and society. For example, the growing gap between marketing scholarship and practical business needs is acknowledged, emphasizing the unique position of service scholars to bridge this divide. While consumer well-being is crucial, the exclusive focus on behavioral science is critiqued. Marketing’s roots are deeply connected to economics, shaping consumer choices, and service scholars can help revive marketing’s essence.

Personal reflections and historical literature assessment.

The services discipline is caught in the general myopic behavioral drift of the marketing discipline. However, they are well positioned to reverse the trend by seeking leadership in PhD programs, journal editorships and review boards, faculty recruiting, hiring and promotion, and by continuing its engagement with industry professionals.

The authors suggest extensive goals for service scholars. To accomplish these goals, it will be necessary to challenge the increasing behavioral drift of the majority of existing scholars in the discipline.

This work is original and controversial. It is meant to inspire discussion and focus attention on the problems inherent in the increasingly myopic behavioral orientation of the members of the discipline’s academic community.

The purpose of this paper is to illustrate how often survivors are dismissed and unsupported in response to actively reaching out for help with distress. The author hopes the vignettes written about in this piece will serve to support and contribute to a body of work, which will educate professionals how to better support. The author shares various experiences when opportunities to help were denied and the impact this had on recovery. It is also noted that the responses of some health professionals mirror the original trauma suffered and therefore add to distress unnecessarily.

The author has written about various experiences in different settings in which the support offered fell below professional standards and contributed to further unnecessary distress. The writing is evocative and rich in descriptive detail of the event and then implications of the event on recovery.

The author concludes that it is helpful to use experiences of being dismissed and unsupported by various professionals to contribute to a body of work, which will hopefully educate and support those in caring professions to support survivors better. The author notes that responses to requests for help can unintentionally and intentionally further exacerbate the distress already experienced by those living with traumatic early life experiences and relational abruptions.

This is the author’s unique and first-hand lived experience of reaching out for help in relation to the distress experienced as a result of early life traumatic and adversarial experiences. The author notes that it is helpful to write about these difficult experiences with the hope that they will inform educational programmes to support health professionals in how they respond to people experiencing trauma. This has helped the author regain a sense of agency in contributing to the prevention of further unhelpful responses from various health professionals to those in distress. The vignettes are rich, deeply evocative and moving. The writing process also helped the author make sense of these further difficulties and how they impacted the recovery process.

This article aims to predict the rapid track geometry change in the short term with a higher detection frequency, and realize the monitoring and maintenance of the railway state.

Firstly, the ABA data needs to be filtered to remove the DC component to reduce the drift due to integration. Secondly, the quadratic integration in frequency domain for concern components of the vertical and lateral ABA needs to be done. Thirdly, the displacement in lateral of the wheelset to rail needs to be calculated. Then the track alignment irregularity needs to be calculated by the integration of lateral ABA and the lateral displacement of the wheelset to rail.

By comparing with a commercial track geometry measurement system, the high-speed railway application results in different conditions, after removal of the influence of LDWR, identified that the proposed method can produce a satisfactory result.

This article helps realize detection of track irregularity on operating vehicle, reduce equipment production, installation and maintenance costs and improve detection density.

Twenty-first century education has been reconfigured to keep up with growing societal shifts in an effort to support a wide variety of learners. As changes occur, the workload for teachers continues to expand with little to no support and resources within classroom spaces to keep up with the current times. Post pandemic, the expectations and systems have shifted emphasizing the need for more programming around social emotional learning and systems to help mitigate the learning disruption. The insurmountable pressure placed on teachers has led to a robust and persistent departure of the profession causing the entire education system to rethink the policies, structures, and systems that influence teacher burnout.

Over the past few decades, university reforms in line with management and enterprise ideals have been well documented. Changes in the ideals underlying the missions of universities have led to changes in their modes of governing and organizing, which in turn drive further transformation of their missions. One set of reforms in Swedish higher education has been the dissolution of collegial bodies and procedures. At the same time, in recent years, we have witnessed an increased interest in collegiality and a reintroduction of collegial bodies and procedures. New translations of collegiality appear not only in how universities are organized, but also in other core aspects of research and higher education. We review examples of peer reviewing, research assessment, and direct recruitment of professors and ask: Can these new translations of collegiality be understood as a revitalization of collegiality, or is it – to draw a parallel with greenwashing – rather a matter of collegiality-washing?