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The purpose of this paper is to develop a framework for the safety performance measurement of belt conveyor systems.

A structural methodology of graph theory and matrix approach is used for developing a framework for safety performance measurement of belt conveyor systems.

The development of a framework for safety performance measurement of belt conveyor systems is essential for ensuring plant safety. For this, safety performance factors, including design and operating contextual factors of belt conveyor systems, are identified. The factors along with their interrelations are modeled using digraph. An equivalent matrix of the digraph provided safety performance function (SPF) of belt conveyor systems, leading to the development of a safety performance index (SPI).

The developed framework will enable the designers for evaluating and comparing alternative designs of conveyor systems from the safety viewpoint. The plant operators can make inferences from the SPI to identify the weak contextual factors in the plant and develop action plans for its mitigation.

The paper is novel and employs graph theory and matrix approach for safety performance measurement. The methodology helps in the quantitative evaluation of the safety performance of belt conveyor systems.

A safe environment is critical for adolescents’ well-being. The purpose of this photovoice study is to explore reasons that make adolescents feel safe in their community.

This study was conducted in Florida through both online and in-person recruitment. After a training session on the ethical and technical use of cameras and a brief introduction of the photovoice methodology, six adolescents took photos (n = 66) in their community and discussed their photos guided by the revised SHOWeD framework. Abridged transcripts were used to match photos with corresponding discussions. Thematic analysis was conducted by the research team.

This study identified four main themes related to adolescents’ safe perceptions, including community protective factors (n = 22 photos) such as safe physical environments and community cohesion; family protective factors (n = 14 photos) including safe home and caring parents; traffic safety (n = 14 photos), such as proper road signs, seat belts for car safety and helmets and locks for bicycle safety; and public safety (n = 8 photos), such as emergency numbers, fire departments and police cars and officers.

Due to the limited number of participants, this study did not compare the similarities and differences of safety perceptions between adolescents living in high crime areas (urban communities) and those in low crime areas (suburban and rural communities). Future photovoice studies are recommended to further explore the influential factors associated with adolescents’ perceived community safety in urban and rural areas with different levels of crime rates to provide more evidence on targeted strategies for community safety promotion in each area.

By exploring the reasons for adolescents’ safe feelings in their community using photovoice, this study provides insights for future intervention programs to promote community safety for children and adolescents from the community, family, traffic and societal perspectives.

This photovoice study not only empowers adolescents to identify community assets related to their safe perceptions but also illustrates valuable insights for researchers and public health professionals for safety promotion.

This study has used a broad research question to explore the reasons that make adolescents feel safe, providing them the opportunities to express their opinions by photo taking and photo discussions. Moreover, rich information at the community, family and societal levels has been collected as related to factors contributing to adolescents’ safe perceptions, adding to the literature on community safety. In addition, this photovoice study has offered both in-person and online participation. Such combination not only provides adolescents with an opportunity to choose a participation method that works best for them but also adds to the photovoice methodology by extending the data collection from in-person to online.

Aircraft maintenance technician (AMT) is the most critical profession in the aircraft maintenance system. The tasks of a licensed AMT require expertise and involve repetitive physical tasks such as tightening or loosening aircraft parts, carrying or removing parts during long working hours under time pressure and day/night shifts. This study aims to attract attention to the difficult working conditions of AMTs and identify the body parts that are at risk of musculoskeletal disorder (MSD).

A questionnaire is developed by the authors to gather demographic information, use of hand tools, equipment, use of fall protection, manual material handling (lifting, pushing, pulling), load weight, environmental factors, and MSD discomfort level perceptions. The questionnaire is applied to 150 AMTs during six months period, and the obtained data are analyzed by sequential ordinal logistic regression (OLR) models.

The ORL results confirm that the use of equipment (lift platform, scissors lift), safety belt attached to the platform, manual material handling, environmental factors (humidity, vibration and illumination) and resting periods have a significant effect on MSD risks. On the contrary, age, experience level, use of small hand tools, temperature and noise are not identified as statistically significant.

The study is original for it considers the working conditions and perceived discomfort levels of AMTs. A questionnaire is introduced to assess the consequences of the use of tools, equipment, fall protection equipment, environmental conditions and work organization on various body parts (neck, shoulder, elbow, back, lower back, wrist-hand, hip, knee, and ankle-feet), and strain level is identified. The study contributes to the theoretical aircraft maintenance literature and managers in practice.

IN an article published in the February issue of AIRCRAFT ENGINEERING the writers discussed the influence upon lubrication of various physical and chemical characteristics of lubricants, practicable and otherwise.

THE passenger seat in civil aircraft is an important piece of equipment. It is important, firstly because it is the one part of the aircraft with which the passenger is in intimate contact and, secondly, because of the bulk and multiplicity of installation in any aircraft, the aggregate weight constitutes a major portion of equipment weight.