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1 – 5 of 5Nianfei Gan, Miaomiao Zhang, Bing Zhou, Tian Chai, Xiaojian Wu and Yougang Bian
The purpose of this paper is to develop a real-time trajectory planner with optimal maneuver for autonomous vehicles to deal with dynamic obstacles during parallel parking.
Abstract
Purpose
The purpose of this paper is to develop a real-time trajectory planner with optimal maneuver for autonomous vehicles to deal with dynamic obstacles during parallel parking.
Design/methodology/approach
To deal with dynamic obstacles for autonomous vehicles during parking, a long- and short-term mixed trajectory planning algorithm is proposed in this paper. In long term, considering obstacle behavior, A-star algorithm was improved by RS curve and potential function via spatio-temporal map to obtain a safe and efficient initial trajectory. In short term, this paper proposes a nonlinear model predictive control trajectory optimizer to smooth and adjust the trajectory online based on the vehicle kinematic model. Moreover, the proposed method is simulated and verified in four common dynamic parking scenarios by ACADO Toolkit and QPOASE solver.
Findings
Compared with the spline optimization method, the results show that the proposed method can generate efficient obstacle avoidance strategies, safe parking trajectories and control parameters such as the front wheel angle and velocity in high-efficient central processing units.
Originality/value
It is aimed at improving the robustness of automatic parking system and providing a reference for decision-making in a dynamic environment.
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Nafisa Ahmad and Md. Abul Kalam Azad
Besides the extensive research on managerial efficiency in the financial sector worldwide, emerging economies in Europe remain untapped. This research scrutinises the impact of…
Abstract
Purpose
Besides the extensive research on managerial efficiency in the financial sector worldwide, emerging economies in Europe remain untapped. This research scrutinises the impact of managerial performance and competitive structures on their financial industry growth in terms of services they offer and ability to liquefy stock in capital markets.
Design/methodology/approach
This study contains data from selected emerging European countries' during the period of 2010–2020. This study uses data from the Heritage Foundation's Index of Economic Freedom to control for firm-level indicators. The fixed-effects (FE) method was used to explore the nexus between financial sector growth and management performance as well as competitive firm structure.
Findings
The findings provide evidence of the existing impact of firm indicators on the financial sector's growth. Two-step system the generalized method of moments (GMM) estimations are used for the robustness check of the authors' model. Whilst on a scavenger hunt through existing literature, the authors realise that there is an overwhelming lack of enthusiasm in this field.
Originality/value
With the intention of better assessment, the authors use regulatory contextual variables to look for any possible impacts and surprisingly discover a pattern in the financial growth nexus.
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This study aims to propose and test a model that examines the potential connections between two teacher situational variables (teacher immediacy and credibility) and three learner…
Abstract
Purpose
This study aims to propose and test a model that examines the potential connections between two teacher situational variables (teacher immediacy and credibility) and three learner affective factors (motivation, attitudes and communication confidence) and to examine how such associations predict learners’ L2WTC (Foreign/second language willingness to communicate) in a language class via a comprehensive communication model to structurally verify the theoretically based associations among these variables.
Design/methodology/approach
In total, 214 females and 198 males took part in the study with age range between 19 and 38 years. Participants filled in a verified, translated Arabic version of the questionnaires using an online questionnaire. Data were gathered using questionnaires and were analyzed using descriptive statistics, confirmatory factor analysis, path analysis and sequential mediation analysis using bootstrapping methods to identify and verify direct and indirect paths in the model.
Findings
The initial L2 communication structural model showed acceptable goodness of model fit. Teacher credibility and immediacy behaviors only indirectly predicted L2WTC through the mediation of affective variables. Motivation and communication confidence mediated the relationship between credibility and L2WTC, while the association between immediacy and L2WTC was mediated by communication confidence.
Originality/value
The findings of this study have important pedagogical implications globally for professions related to communication instruction, especially with regard to teacher credibility behaviors and particularly for practitioners and beneficiaries in EFL contexts where learners are widely acknowledged for their unwillingness to communicate in foreign language classes.
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Danladi Chiroma Husaini, Vinlee Bernardez, Naim Zetina and David Ditaba Mphuthi
A direct correlation exists between waste disposal, disease spread and public health. This article systematically reviewed healthcare waste and its implication for public health…
Abstract
Purpose
A direct correlation exists between waste disposal, disease spread and public health. This article systematically reviewed healthcare waste and its implication for public health. This review identified and described the associations and impact of waste disposal on public health.
Design/methodology/approach
This paper systematically reviewed the literature on waste disposal and its implications for public health by searching Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA), PubMed, Web of Science, Scopus and ScienceDirect databases. Of a total of 1,583 studies, 59 articles were selected and reviewed.
Findings
The review revealed the spread of infectious diseases and environmental degradation as the most typical implications of improper waste disposal to public health. The impact of waste includes infectious diseases such as cholera, Hepatitis B, respiratory problems, food and metal poisoning, skin infections, and bacteremia, and environmental degradation such as land, water, and air pollution, flooding, drainage obstruction, climate change, and harm to marine and wildlife.
Research limitations/implications
Infectious diseases such as cholera, hepatitis B, respiratory problems, food and metal poisoning, skin infections, bacteremia and environmental degradation such as land, water, and air pollution, flooding, drainage obstruction, climate change, and harm to marine and wildlife are some of the public impacts of improper waste disposal.
Originality/value
Healthcare industry waste is a significant waste that can harm the environment and public health if not properly collected, stored, treated, managed and disposed of. There is a need for knowledge and skills applicable to proper healthcare waste disposal and management. Policies must be developed to implement appropriate waste management to prevent public health threats.
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Anjum Mishu, Hanan Abdullah Mohammed, Sabreen Ahmed A. Hakami and Gaus Chowdhury
This study aims to focus on how online presentations have a positive effect on the anxiety of the students, especially students who are introverted by nature and always suffer…
Abstract
Purpose
This study aims to focus on how online presentations have a positive effect on the anxiety of the students, especially students who are introverted by nature and always suffer from anxiety and stress while performing face-to-face presentations in the classrooms, which negatively affect students’ performance and, thereby grade.
Design/methodology/approach
This study adopted a quantitative research design to obtain a broader perspective. An online questionnaire, developed using Google Forms, was accessed by 239 female undergraduate students from Level 1 to 8 of the English Department at the College of Languages and Translation in King Khalid University, Saudi Arabia. The questionnaire consisted of 15 closed Likert-type questions. The Arabic translation of the questions was included in the questionnaire to make the participants more comfortable answering the questions as all the participants' L1 is Arabic.
Findings
With the outbreak of the pandemic in March 2020, COVID-19 became a global health issue and significantly impacted education worldwide. With this, a digital transformation took place, resulting in a total e-learning distance education system. This type of technology enhanced distance learning approach had to be adopted as social and physical contacts were limited globally to mitigate the transmissions of the virus. Accordingly, all lectures, learning activities, tests and other forms of evaluation were conducted via distance e-learning. When oral presentations were conducted online, a new reality emerged in this changed situation. This study sought to prove that online oral presentations positively reduce introvert EFL learners' anxiety and stress.
Research limitations/implications
The study was conducted using a small number of samples; thus, to gain substantial insight, future research could be conducted with a greater number of samples from diverse demographic backgrounds. Teachers' perceptions of online oral presentations could also be considered in future studies since education consolidates between learners and teachers. In addition, as this research explored English language major students only, further comparative studies can be conducted including students from other disciplines, which may lead to new insights and issues related to online presentations. This study used a questionnaire as a data collection instrument. It is recommended to use qualitative tools such as interviews, focus group meetings, journals and student diaries in future studies so that more information about in-person presentation anxiety can be discovered.
Originality/value
Participants' opinions, procured through the questionnaire of this study, can bring new insights for educators and policymakers to incorporate online presentations as one of the mainstream assessment methods for tertiary-level courses.
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