8C.005 Post-prevention control: moderating the ground handlers’ fatigue and safety performance outcomes

Driving safety is considered to have a strong relationship with traffic flow characteristics. However, very few studies have addressed the safety impacts in the three-phase traffic theory that has been demonstrated to be an advancement in explaining the empirical features of traffic flow. Another important issue affecting safety is driver experience heterogeneity, especially in developing countries experiencing a dramatic growth in the number of novice drivers. Thus, the primary objective of the current study is to develop a microsimulation environment for evaluating safety performance considering the presence of novice drivers in the framework of three-phase theory. First, a car-following model is developed by incorporating human physiological factors into the classical Intelligent Driver Model (IDM). Moreover, a surrogate safety measure based on the integration concept is modified to evaluate rear-end crashes in terms of probability and severity simultaneously. Based on a vehicle-mounted experiment, the field data of car-following behavior are collected by dividing the subjects into a novice group and an experienced group. These data are used to calibrate the proposed car-following model to explain driver experience heterogeneity. The results indicate that our simulation environment is capable of reproducing the three-phase theory, and the changes in the modified surrogate safety measure are highly correlated with traffic phases. We also discover that the presence of novice drivers leads to different safety performance outcomes across various traffic phases. The effect of driver experience heterogeneity is found to increase the probability of the rear-end crashes as well as the corresponding severity. The results of this study are expected to provide a scientific understanding of the mechanisms of crash occurrences and to provide application suggestions for improving traffic safety performance.

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Voluntary Policy Interventions: Elevating Safety and Health Compliance in Aircraft Ground Handling Operations

Global Journal of Engineering and Technology Review Vol.4 (4) October-December. 2019 - Global Journal of Engineering and Technology Review ◽

10.35609/gjetr.2019.4.4(3) ◽

2019 ◽

Vol 4 (4) ◽

pp. 93-100

Author(s):

Muhafiza Musa ◽

Ahmad Shahrul Nizam Isha@Isa

Keyword(s):

Safety Culture ◽

Occupational Safety ◽

Safety Management ◽

Self Regulation ◽

Performance Outcomes ◽

Safety Performance ◽

Policy Interventions ◽

Culture Dimensions ◽

Safety And Health ◽

Ground Handling

Objective – The present study intends to examine the safety culture and safety performance outcomes relationship, present the findings on safety culture dimensions and discuss in detail on the moderating role of occupational health and safety management system (OHSMS) policy interventions. Methodology/Technique – A literature research was employed to review occupational safety and health area on specific safety culture dimensions with regard to aviation (between the years 1997 to 2018) as well as law and science policy on human behavior. Findings – The findings on safety culture dimensions were discovered from a multilevel perspective of safety culture and climate studies and were categorized as generalization and personalization. The findings also demonstrated the mandatory and voluntary approach in carrying out the OHSMS policy interventions. Novelty – The findings on safety culture dimensions indicated the functionality of generalization and personalization that portray the substance of the workplace culture for aircraft ground handling. The introduction of voluntary policy interventions to elevate OHSMS compliance was essential to the study because they revealed people's willingness to change their behavior, practice self-regulation, and respond to the existing regulatory models. Type of Paper: Conceptual Keywords: OHSMS; voluntary compliance; safety culture; safety performance outcomes

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Dose safety motivation mediate the effect of psychological contract of safety on flight attendants' safety performance outcomes?: A social exchange perspective

Journal of Air Transport Management ◽

10.1016/j.jairtraman.2020.101945 ◽

2021 ◽

Vol 90 ◽

pp. 101945

Author(s):

Sanaz Vatankhah

Keyword(s):

Social Exchange ◽

Psychological Contract ◽

Performance Outcomes ◽

Safety Performance ◽

Flight Attendants ◽

Safety Motivation

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Quantifying Vocal Power: Correlation of Whole-Body Anaerobic Power to Vocal Function Measures

Journal of Speech Language and Hearing Research ◽

10.1044/2020_jslhr-20-00110 ◽

2020 ◽

Vol 63 (8) ◽

pp. 2597-2608

Author(s):

Emily N. Snell ◽

Laura W. Plexico ◽

Aurora J. Weaver ◽

Mary J. Sandage

Keyword(s):

Fundamental Frequency ◽

Forced Vital Capacity ◽

Vital Capacity ◽

Anaerobic Power ◽

Performance Outcomes ◽

Sound Level ◽

Whole Body ◽

Vocal Function ◽

Laryngeal Diadochokinesis ◽

High Sound

Purpose The purpose of this preliminary study was to identify a vocal task that could be used as a clinical indicator of the vocal aptitude or vocal fitness required for vocally demanding occupations in a manner similar to that of the anaerobic power tests commonly used in exercise science. Performance outcomes for vocal tasks that require rapid acceleration and high force production may be useful as an indirect indicator of muscle fiber complement and bioenergetic fitness of the larynx, an organ that is difficult to study directly. Method Sixteen women (age range: 19–24 years, M age = 22 years) were consented for participation and completed the following performance measures: forced vital capacity, three adapted vocal function tasks, and the horizontal sprint test. Results Using a within-participant correlational analyses, results indicated a positive relationship between the rate of the last second of a laryngeal diadochokinesis task that was produced at a high fundamental frequency/high sound level and anaerobic power. Forced vital capacity was not correlated with any of the vocal function tasks. Conclusions These preliminary results indicate that aspects of the laryngeal diadochokinesis task produced at a high fundamental frequency and high sound level may be useful as an ecologically valid measure of vocal power ability. Quantification of vocal power ability may be useful as a vocal fitness assessment or as an outcome measure for voice rehabilitation and habilitation for patients with vocally demanding jobs.

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Executive Functions and Clinical and Academic Outcomes in Speech-Language Pathology Graduate Students

Perspectives of the ASHA Special Interest Groups ◽

10.1044/2020_persp-19-00143 ◽

2020 ◽

Vol 5 (5) ◽

pp. 1221-1230

Author(s):

Jane Roitsch ◽

Kimberly A. Murphy ◽

Anastasia M. Raymer

Keyword(s):

Executive Function ◽

Academic Outcomes ◽

Graduate Program ◽

Performance Outcomes ◽

Future Research ◽

Speech Language Pathology ◽

Grade Point ◽

Praxis Ii ◽

Language Pathology ◽

Preliminary Study

Purpose The purpose of this study was to investigate executive function measures as they relate to clinical and academic performance outcomes of graduate speech-language pathology students. Method An observational design incorporating correlations and stepwise multiple regressions was used to determine the strength of the relationships between clinical outcomes that occurred at various time points throughout the graduate program (clinical coursework grades throughout the program and case study paper scores at the end of the program), academic outcomes (graduate grade point average and Praxis II exam in speech-language pathology scores), and executive function (EF) scores (EF assessment scores, self-reported EF scores). Participants were 37 students (36 women, M age = 24.1) in a master's degree program in speech-language pathology at a southeastern U.S. university during the 2017–2018 academic year. Results Findings of this preliminary study indicated that a limited number of objective EF scores and self-reported EF scores were related to clinical and academic outcomes of graduate speech-language pathology students. Conclusion As results of this preliminary study suggest that EF tests may be related to clinical and academic outcomes, future research can move to study the potential role of EF measures in the graduate admissions process in clinical graduate programs such as speech-language pathology.

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