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Sanne Pagh Møller, Charlotte Brauer, Sigurd Mikkelsen, Tine Alkjær, Henrik Koblauch, Ellen Bøtker Pedersen, Erik B Simonsen, Lau Caspar Thygesen
Musculoskeletal shoulder-load among baggage handlers measured by combining duration and intensity based on biomechanical and epidemiological information may be a stronger predictor of subacromial shoulder disordersthanbaggage handler seniority.In 2012, a cohort of baggage handlers employed at Copenhagen Airport in 1990-2012, and a cohort of unskilledotherwise employed men answered a survey.Self-reported information on work tasks during employment in the airport in combination with work task specific biomechanically modelled forces in the shoulder joint was used to estimate shoulder-load...
September 19, 2017: Ergonomics
Gavin K Lenton, Tim L A Doyle, Dan Billing, David J Saxby, Jeremy Higgs, David G Lloyd
Soldiers carry heavy loads that may cause general discomfort, shoulder pain, and injury. This study assessed if new body armour designs that incorporated a hip belt reduced shoulder pressures and improved comfort. Twenty-one Australian soldiers completed treadmill walking trials wearing six different body armours with two different loads (15 kg and 30 kg). Contact pressures applied to the shoulders were measured using pressure pads, and qualitative assessment of comfort and usability were acquired from questionnaires administered after walking trials...
September 18, 2017: Ergonomics
Will Tutton
No abstract text is available yet for this article.
September 15, 2017: Ergonomics
Edith Galy, Julie Paxion, Catherine Berthelon
The distinction between several components of mental workload is often made in the ergonomics literature. However, measurements used are often established from a global score, notably with several questionnaires that originally reflect several dimensions. The present study tested the effect of driving situation complexity, experience and subjective levels of tension and alertness on each dimension of the NASA-TLX questionnaire of workload, in order to highlight the potential influence of intrinsic, extraneous and germane load factors...
September 8, 2017: Ergonomics
Sara Albolino, Giulia Dagliana, Dariana Illiano, Michela Tanzini, Francesco Ranzani, Tommaso Bellandi, Ismaele Fusco, Irene Bellini, Giulia Carreras, Mariarosaria Di Tommaso, Riccardo Tartaglia
Maternal and neonatal mortality and morbidity associated with childbirth is a problem of the highest priority. This research has been aimed at testing a modified version of the WHO Safe childbirth checklist in one Italian hospital and to evaluate the tool in terms of its impact on clinical practice and safety. Results show that the presence of correctly compiled partogram tool is strongly and significantly associated with the checklist implementation (OR= 14.9, 95% confidence interval [CI] =3.5, 63.9). Compliance to the checklist was high for midwives (96%) and very low for obstetricians (3%)...
September 7, 2017: Ergonomics
Bronson Boi Du, Philip L Bigelow, Richard P Wells, Hugh W Davies, Peter Hall, Peter W Johnson
Laboratory studies have shown that exposure to whole-body vibration (WBV) increases physical and mental fatigue, which are common issues professional drivers face. The objective of this study was to determine whether altering WBV exposures had any effect on driver vigilance and discomfort. A repeated measures crossover design of five truck drivers with regular 10-h routes was used. Active and passive suspension truck seats were evaluated. For each seat, WBV exposures were measured. Participants completed a discomfort questionnaire and a reaction time task before and after their shift for two weeks, one week per seat...
September 7, 2017: Ergonomics
(no author information available yet)
No abstract text is available yet for this article.
September 5, 2017: Ergonomics
Simon S W Li, Daniel H K Chow
This study investigated the effects of carrying a backpack while walking. Critical changes featuring the disproportionality of increases in trunk muscle activation and lumbar joint loading between light and heavy backpack carriage weight may reveal the load-bearing strategy (LBS) of the lumbar spine. This was investigated using an integrated system equipped with a motion analysis, a force platform and a wireless surface electromyography (EMG) system to measure the trunk muscle EMG amplitudes and lumbar joint component forces...
August 23, 2017: Ergonomics
Zara Whysall, James Bowden, Michael Hewitt
Since work can be restorative to health, attending work when unwell should not be viewed as an inherently negative phenomenon. However, the functional benefits are likely to depend on the health condition, and the psychosocial quality of the work provided. The current study used a workforce survey to explore differences in the pattern of presenteeism and absenteeism by health condition, the association of psychosocial work factors with presenteeism compared to absenteeism, and their interaction to predict health...
August 23, 2017: Ergonomics
Yee Mun Lee, Elizabeth Sheppard
Use of Daytime Running Lights (DRL) is mandatory in many countries for motorcycles, and in some for cars. However, in developing countries, DRLs may be optional or compliance low. The effect of car or motorcycle headlights and lighting conditions on Malaysian drivers' ability to perceive and judge the safety of pulling out was investigated. Stimuli were photographs depicting either daytime or nighttime taken at a T-junction with approaching vehicles with headlights on or off. Headlights improved drivers' ability to perceive cars and motorcycles in the nighttime photographs but not the daytime photographs, although this could be due to the bright weather in the photographs...
August 16, 2017: Ergonomics
Michelle Cardoso, Colin McKinnon, Dan Viggiani, Michel J Johnson, Jack P Callaghan, Wayne J Albert
A postural evaluation during a prolonged driving task was conducted to determine the ergonomic validity of a new freely adjustable truck seat prototype. Twenty participants were recruited to perform two 2-h simulated driving sessions. Postures were assessed using motion capture, accelerometers and pressure pads. Subjective discomfort was also monitored in 15-min increments using ratings of perceived discomfort (RPD) and the Automotive Seating Discomfort Questionnaire. Participants had a more neutral spine posture during the first hour of the drive and reported lower RPDs while sitting in the prototype...
August 16, 2017: Ergonomics
Han Zhang
No abstract text is available yet for this article.
August 7, 2017: Ergonomics
Richard M Kesler, Ipek Ensari, Rachel E Klarenc, Robert W Motl, Elizabeth T Hsiao-Wecksler, Karl S Rosengren, Bo Fernhall, Denise L Smith, Gavin P Horn
Firefighters'self-contained breathing apparatus (SCBAs) protect the respiratory system during firefightingbut increases the physiological burden. Extended duration SCBA (>30min) have increased air supply, increasing the duration of firefighting work cycles. To examine the effects of SCBAconfigurationand work cycle (length and rest), 30firefighterscompleted seven trials using different SCBAand one or two bouts of simulated firefighting following work cycles common in the United States. Heart rate, core temperature, oxygen consumption, work output, and self-reported perceptions were recorded during all activities...
August 1, 2017: Ergonomics
Nelson Ositadimma Oranye, Jayson Benneth
Objective To compare the prevalence of musculoskeletal and non-musculoskeletal injuries in a cohort of workers in Manitoba healthcare sector, who made injury claims between 2002 and 2012. MethodsA retrospective study, using secondary data from WCB Manitoba. Logistic regression was used to determine odds ratios for nature of work-related injuries among different groups of workers. Results Idiopathic work-related musculoskeletal disorders constituted 74.6% of all the injury claims. Injury risks varied between worker groups, and a significant difference was found within the female group, χ(2)=13...
July 31, 2017: Ergonomics
Gavin P Horn, Richard M Kesler, Steve Kerber, Kenneth W Fent, Tad J Schroeder, William S Scott, Patricia C Fehling, Bo Fernhall, Denise L Smith
Firefighters' thermal burden is generally attributed to high heat loads from the fire and metabolic heat generation, which may vary between job assignments and suppression tactic employed. Utilising a full-sized residential structure, firefighters were deployed in six job assignments utilising two attack tactics (1. Water applied from the interior, or 2. Exterior water application before transitioning to the interior). Environmental temperatures decreased after water application, but more rapidly with transitional attack...
July 31, 2017: Ergonomics
Timothy J Neville, Paul M Salmon, Gemma J M Read
Intra-team communication plays an important role in team effectiveness in various domains including sport. As such, it is a key consideration when introducing new tools within systems that utilise teams. The difference in intra-team communication of Australian Rules Football (AFL) umpiring teams was studied when umpiring with or without radio communications technology. A cross-sectional observational study was conducted to analyse the verbal communication of seven umpiring teams (20 participants) grouped according to their experience with radio communication...
July 31, 2017: Ergonomics
Veerle Ross, Alexandra Y Vossen, Fren T Y Smulders, Robert A C Ruiter, Tom Brijs, Kris Brijs, Geert Wets, Ellen M M Jongen
Intersection accidents result in a significant proportion of road fatalities, and attention allocation likely plays a role. Attention allocation may depend on (limited) working memory (WM) capacity. Driving is often combined with tasks increasing WM load, consequently impairing attention orienting. This study (n = 22) investigated WM load effects on event-related potentials (ERPs) related to attention orienting. A simulated driving environment allowed continuous lane-keeping measurement. Participants were asked to orient attention covertly towards the side indicated by an arrow, and to respond only to moving cars appearing on the attended side by pressing a button...
July 31, 2017: Ergonomics
L Reinerman-Jones, D J Barber, J L Szalma, P A Hancock
We first tested the effect of differing tactile informational forms (i.e. directional cues vs. static cues vs. dynamic cues) on objective performance and perceived workload in a collaborative human-robot task. A second experiment evaluated the influence of task load and informational message type (i.e. single words vs. grouped phrases) on that same collaborative task. In both experiments, the relationship of personal characteristics (attentional control and spatial ability) to performance and workload was also measured...
July 26, 2017: Ergonomics
Peter Le, Alexander Aurand, Benjamin A Walter, Thomas M Best, Safdar N Khan, Ehud Mendel, William S Marras
The objective of this study was to develop and test an EMG-based coactivation index and compare it to a coactivation index defined by a biologically-assisted lumbar spine model to differentiate between tasks. The purpose was to provide a universal approach to assess coactivation of a multi-muscle system when a computational model is not accessible. The EMG-based index developed utilized anthropometric-defined muscle characteristics driven by torso kinematics and EMG. Muscles were classified as agonists/antagonists based upon 'simulated' moments of the muscles relative to the total 'simulated' moment...
July 26, 2017: Ergonomics
Aaron Silk, Gavin Lenton, Robbie Savage, Brad Aisbett
Search and rescue operations are necessary in locating, assisting and recovering individuals lost or in distress. In Australia, land-based search and rescue roles require a range of physically demanding tasks undertaken in dynamic and challenging environments. The aim of the current research was to identify and characterise the physically demanding tasks inherent to search and rescue operation personnel within Australia. These aims were met through a subjective job task analysis approach. In total, 11 criterion tasks were identified by personnel...
July 25, 2017: Ergonomics
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