Clive D'Souza

Clive D'Souza
University of Pittsburgh | Pitt · Rehabilitation Science and Technology

PhD
Looking for graduate (PhD, MS) students in engineering (IE, BME) or rehabilitation sciences (assistive/rehab tech, OT)

About

76
Publications
12,025
Reads
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401
Citations
Additional affiliations
May 2004 - August 2013
University at Buffalo, The State University of New York
Position
  • Research Assistant

Publications

Publications (76)
Article
Full-text available
Current accessibility standards in the U.S. prescribe minimum dimensions for “clear floor area” to accommodate wheeled mobility device (WhMD) users on transportation vehicles. Prior research on the anthropometry of WhMD users (n = 500) indicates that these dimensions are too small to accommodate the size of many occupied WhMDs, especially power cha...
Article
Full-text available
Load carriage induces systematic alterations in gait patterns and pelvic-thoracic coordination. Leveraging this information, the objective of this study was to develop and assess a statistical prediction algorithm that uses body-worn inertial sensor data for classifying load carrying modes and load levels. Nine men participated in an experiment car...
Article
Full-text available
Accurate, reliable, and cost-effective quantification of real-time biomechanical exposures in occupational settings remains an enduring pursuit in ergonomics. Miniaturized, wireless, body-worn inertial sensors offer opportunities to directly measure vast and personalized kinematics data in both laboratory and applied settings. This review investiga...
Article
Introduction The aim of the present review is to track the evolution of wearable IMUs from their use in supervised laboratory-based ambulatory settings to their application for long-term monitoring of human movement in unsupervised naturalistic settings. Areas covered Four main emerging areas of application were identified and synthesized, namely,...
Article
Autonomous vehicles (AVs) have the potential to vastly improve independent, safe, and cost-effective mobility options for individuals with disabilities. However, accessibility considerations are often overlooked in the early stages of design, resulting in AVs that are inaccessible to people with disabilities. Vehicles serving people with disabiliti...
Article
Full-text available
Rudimentary methods for electronic waste (e-waste) recycling employed in developing countries are a source of work-related musculoskeletal disorders (WRMSDs). A summarized comparison of WRMSDs and preliminary exposure assessment among e-waste dismantlers (D) and burners (B) in Agbogbloshie, Ghana is presented. A cross-sectional study was conducted...
Chapter
Full-text available
This study examined the goodness-of-fit of using a sigmoid function to characterize time-series angular displacement trajectories during two-handed anterior lifting. Twenty-six participants performed two-handed anterior lifting with a low (4.5 kg) vs. high (22.7 kg) load at floor vs. knee lifting height. A sigmoid function with three parameters was...
Article
Purpose: To assess the impact of the COVID-19 pandemic and associated mitigation measures on persons with sensory impairments (SI), including visual (VI) and hearing impairments (HI). Design: Cross-sectional survey. Methods: Adults with VI (best-corrected visual acuity <20/60 in the better-seeing eye), HI (ICD-10 codes), and age- and sex-match...
Chapter
Full-text available
Recycling of electrical and electronic waste (e-waste) in developing countries is mostly conducted in the informal sector consisting of low skilled workers. Informal e-waste recycling predominantly involves the physically demanding work of manually collecting, dismantling and burning of e-waste items to extract reusable components and valuable meta...
Chapter
Full-text available
Unstructured and unregulated work is expanding fast among low- and middle-income countries (LMICs). Furthermore, accumulation of urban waste resulting from overconsumption is a global concern. Hence, waste management and recycling have received increased attention. One specific waste category pertaining to electrical and electronic waste (e-waste)...
Chapter
Full-text available
The unregulated and unorganized structure of informal electronic waste recycling worksites exposes workers to numerous occupational hazards. This context also presents research challenges in collecting exposure data to establish linkages with adverse health effects and development of risk-mitigating strategies. This paper presents some findings fro...
Article
Full-text available
Multiple field studies provide qualitative accounts of usability barriers experienced by users of wheeled mobility devices on public transit. This study aimed to examine these usability barriers from the theoretical perspective of Environmental Docility by quantifying the relationship between functional capabilities of wheeled mobility device users...
Article
Full-text available
Occupational exposure associated with unstructured, informal e-waste recycling has received very limited attention. This study aimed to quantify the occupational physical exposures among informal e-waste workers at the largest e-waste site in Africa. A cross-sectional field survey of 163 male e-waste workers was conducted using a self-report occupa...
Article
Full-text available
Informal recycling of electrical and electronic waste (e-waste) has myriad environmental and occupational health consequences, though information about the chronic musculoskeletal health effects on workers is limited. The aim of this study was to examine the prevalence and inten- sity of self-reported musculoskeletal disorder (MSD) symptoms among e...
Conference Paper
Full-text available
Most existing ergonomic assessment tools are intended for routine work. Time- and cost- efficient observational tools for ergonomic assessment of unregulated work are lacking. This paper presents the development of an observation-based tool designed to investigate ergonomic exposures among informal electronic waste workers that could be applied to...
Article
Full-text available
Shared automated vehicles (SAVs) in the form of low-speed driverless shuttles have the potential to improve independent mobility for older adults and people with disabilities. At full vehicle autonomy and in the absence of an onboard operator, tasks such as ingress-egress, interior circulation, and securement of passengers and carry-on items will n...
Chapter
The number of older adults in the United States is growing rapidly. The dual phenomena of global aging coupled with increased longevity for individuals with disabilities can create new challenges for societies striving to meet the needs of populations aging into disability and those aging with disabilities acquired earlier in the life course. But t...
Article
Full-text available
The International Classification of Functioning, Disability, and Health (ICF) is a universal framework used to classify human functioning in clinical and rehabilitative domains. The objective of this study was to examine the utility of the ICF as a framework to categorize and measure barriers to public transportation reported by older adults. ICF c...
Conference Paper
Full-text available
Shared automated vehicles (SAVs) in the form of low-speed driverless shuttles have the potential to improve independent mobility for older adults and people with disabilities. At full vehicle autonomy and in the absence of an onboard operator, tasks such as ingress-egress, interior circulation, and securement of passengers and carry-on items will n...
Article
Full-text available
Manual carrying of heavy weight poses a major risk for work-related low back injury. Body-worn inertial sensors present opportunities to study the effects of ambulatory work tasks such as load carriage in more realistic conditions. An immediate effect of load carriage is reflected in altered gait kinematics. To determine the effects of load carriag...
Preprint
This brief article presents the development of the Coronavirus Disability Survey (COV-DIS). The COV-DIS is a survey instrument designed dot measure the impact of the novel coronavirus (COVID-19) pandemic on the lives of persons with disabilities. Those with disabilities (e.g. deaf and hard of hearing, blind and visually impaired, physically disable...
Article
Full-text available
Public transit serves users with a broad range of physical capabilities and design needs. However information about the operational effects of diverse users interacting with the transit system is scarce. This paper examined the occurrence and effects of boarding and alighting passengers with mobility aids (wheelchairs, scooters, walkers and canes),...
Article
Independent mobility in people with physical disabilities notably enhances their quality of life by allowing social inclusion and promoting self-esteem while reducing caregiver burden. Despite significant technological advances in the last few decades, people with physical disabilities who rely on wheeled mobility devices continue to face significa...
Article
Although the presence of disabled passengers on fixed-route transit affects operations, their data are often ignored, aggregated into a broad "encumbered" category, or marked as outliers in analyses of service performance measures. This study examines boarding and alighting characteristics of passengers encumbered with mobility aids (wheelchairs, s...
Article
Full-text available
Intraoperative stress can influence both surgeon health and patient outcomes, however stress management is not properly assessed during surgical training. Seven healthy, novice individuals participated in an experiment involving precision pin transfers using laparoscopic surgical instruments. A visual stressor introduced by altering the digital blu...
Article
Full-text available
Low-speed, driverless automated shuttles have the potential to significantly improve community mobility for older adults and people with disabilities who are otherwise unable or ineligible to drive. However, accessibility and inclusive design of these shuttles to accommodate the spectrum of human abilities and impairments is impeded by the lack of...
Article
Full-text available
The objective of this study was to examine potential gender effects on the performance of a statistical algorithm for predicting hand-load levels that uses body-worn inertial sensor data. Torso and pelvic kinematic data was obtained from 11 men and 11 women in a laboratory experiment while they carried anterior hand-loads of 13.6 kg, and 22.7 kg, a...
Article
Full-text available
Electronic waste (e-waste) is a worldwide problem in terms of increasing production rate in the global waste stream. Its recycling is known to be associated with adverse health outcomes. The recycling site at Agbogbloshie is a major e-waste recycling hub which presents enormous health threats to the residents in this community as a result of exposu...
Article
Postural stability and balance during manual material handling and industrial tasks are fundamental to ergonomic assessment of workplace tasks. Previous research has determined that accurate prediction of a person’s balance maintenance strategy is one of the most important parameters affecting the accuracy of posture prediction algorithms. Digital...
Article
Full-text available
Background/Aim: E-waste recycling at Agbogbloshie consists mainly of collection, dismantling and burning of electronic waste. Processes involved are highly informal and physically demanding, consisting of varying levels of lifting, torso bending and twisting, prolonged sitting and standing. These activities are likely to cause musculoskeletal disor...
Article
Ergonomics of household vacuuming has received little attention despite the pervasive nature of this task. The aim of this study was to quantitatively assess the level of muscular load of the upper extremity during carpeted floor vacuuming with household upright cleaners, which represent the most common type of vacuum cleaners in the US. Eighteen p...
Article
Full-text available
Driverless shared automated vehicles (SAVs) have the potential to substantially improve independent mobility for the growing number of older adults and people with disabilities who are unable or ineligible to drive. However, early designs and deployments of SAVs have lacked accommodations for people with disabilities. This article describes a case...
Conference Paper
This study investigated the effect of obstacles of different heights on task performance and compensatory movements of six individuals with a body mass index (BMI) ≥ 30kg/m². Obstacle heights were increased from 36cm to 66cm in 5cm increments using a method of limits. Video-based task analysis was used to develop a conceptual model of obstacle clea...
Article
Full-text available
Physical demands of household carpet vacuuming and associated risks for musculoskeletal problems have received little attention although the level of muscle exertions is often assumed to be similar to that of occupational vacuuming. The aim of this study was to quantitatively assess the level of muscle activities of the upper extremity during carpe...
Conference Paper
Modeling of human motion is common in ergonomic analysis of industrial tasks and can help improve workplace design. We propose a method for modeling the trajectories of hand movements in the frontal plane during a sequential reach task that involves threading string through a system of pulleys. We model the motions as a combination of two consecuti...
Conference Paper
Full-text available
This paper describes a development project designed to update the anthropometry evidence for accommodating users of wheeled mobility devices (WhMDs) in the built environment. An interactive web-based design tool was developed for determining the dimensions of clear floor area and knee-toe clearance to achieve a user-specified level of physical acco...
Conference Paper
Full-text available
Although the presence of disabled passengers on fixed-route transit affects operations, their data are often ignored, aggregated into a broad “encumbered” category, or marked as outliers in analyses of service performance measures. This study examines boarding and alighting characteristics of passengers encumbered with mobility aids (wheelchairs, s...
Article
Full-text available
Background: Low ridership of public transit buses among wheeled mobility device users suggests the need to identify vehicle design conditions that are either particularly accommodating or challenging. The objective of this study was to determine the effects of low-floor bus interior seating configuration and passenger load on wheeled mobility devic...
Article
Full-text available
This study explored the use of body posture kinematics derived from wearable inertial sensors to estimate force exertion levels in a two-handed isometric pushing and pulling task. A prediction model was developed grounded on the hypothesis that body postures predictably change depending on the magnitude of the exerted force. Five body postural angl...
Article
Full-text available
The confluence of demographic trends in aging and disability prevalence, increased expectations among workers and consumers with and without impairments, and greater reliance on complex yet pervasive technologies (e.g., automation, internet of things) has resulted in an increased emphasis on designing for human-system performance and accommodation...
Conference Paper
Full-text available
Introduction: Sequential reach tasks are a common component of manual assembly jobs. These tasks typically involve manipulating a work object or material and reaching to successive target locations with different precision requirements. Ergonomics research on the control of hand movements has largely focused on tasks requiring discrete reaches (e.g...
Article
Full-text available
The emergence of low-floor bus designs and related regulatory standards in the U.S. have resulted in substantial improvements in public transit accessibility. However, passengers using wheeled mobility devices still experience safety concerns and inefficiencies in boarding, disembarking, and interior circulation on low-floor buses. This study inves...
Conference Paper
Full-text available
Three healthy individuals participated in a laboratory experiment that required routing a thin continuous thread through a series of pulleys mounted on a vertical work surface. Task precision demand was manipulated by altering pulley outer diameter (38 mm, 76 mm, and 152 mm) and groove width (3 mm, 6 mm, and 9 mm). The target location of each desti...
Article
Full-text available
This study examined interactions between inertial sensor (IS) performance and physical task demand on posture kinematics in a two-handed force exertion task. Fifteen male individuals participated in a laboratory experiment that involved exerting a two-handed isometric horizontal force on an instrumented height-adjustable handle. Physical task deman...
Article
The research literature on access ramps used in transit vehicles is undermined by inconsistent methodologies used across studies, thus providing an inconclusive evidence base for proposed Federal guidelines that would impose a maximum 1:6 slope for all deployment situations. The current study assessed the usability of ramp slope for mobility aid us...
Conference Paper
Full-text available
This study aimed to identify training components in a cycle training program for children with cognitive impairments (CI) with the goal of generating requirements for potential technology interventions to support cycling skills acquisition and retention. A qualitative study was conducted comprising of semi-structured interviews with cycling trainer...
Article
Full-text available
Public transportation plays an important role in shaping urban quality of life. However, urban transportation design and policy-making lacks a strong human factors knowledge base for accommodating a functionally diverse ridership including the aging and mobility impaired. This study examines seating configurations in contemporary low-floor buses an...
Article
Full-text available
The purpose of this paper is to demonstrate the impact of low- floor bus seating configuration, passenger load factor (PLF) and passenger characteristics on individual boarding and disembarking (B-D) times -a key component of vehicle dwell time and overall transit system performance. A laboratory study was conducted using a static full-scale mock-u...
Article
Full-text available
In the U.S. The technical criteria in a voluntary building standard called ICC/ANSI A117.1. are the basis for minimum building regulations that accommodate wheeled mobility users. Research conducted in 1970's was the basis for these criteria but since that time, wheelchairs and their users have changed considerably. This paper describes a research...
Conference Paper
Full-text available
Operator clearance spaces under computer workstations and other work surfaces are necessary to ensure that seated operators have adequate space for their lower extremities in order to use the working surface without any obstruction. In this paper we present operator clearances at workstations designed to accommodate occupants of manual and powered...
Conference Paper
Full-text available
Low-floor buses with folding ramp access represent a significant improvement in accessible public transit for passengers with mobility disabilities. However, the safety and usability aspects of the interior design of low-floor buses on blind and visually impaired users has not been studied in much detail. A laboratory study was completed using a st...
Article
Full-text available
Anthropometric studies typically require a large number of individuals that are selected in a manner so that demographic characteristics that impact body size and function are proportionally representative of a user population. This sampling approach does not allow for an efficient characterization of the distribution of body sizes and functions of...
Article
Full-text available
Low-floor buses represent a significant improvement in accessible public transit for passengers with limited mobility. However, there is still a need for research on the inclusive design of transit buses to identify specific low-floor bus design conditions that are either particularly accommodating or challenging for passengers with functional and...
Article
Full-text available
Recent research on the anthropometry of wheeled mobility devices and their users (n = 369) indicates that the current dimensions for clear floor area prescribed in U. S. accessibility standards for transportation are inadequate for accommodating many users of wheeled mobility devices, especially those who use power chairs and scooters. The current...
Chapter
Full-text available
The IDeA Center at the University at Buffalo has been developing an anthropometry database of wheeled mobility device users in the U.S. in a multi-year study. The objective of this paper is to demonstrate data visualization tools and methods that are being developed to help inform the design of environments and products. One tool is an interactive...
Article
Full-text available
Space requirements for accommodating wheeled mobility devices and their users in the built environment are key components of standards for accessible design. These requirements typically include dimensions for clear floor areas, maneuvering clearances, seat and knee clearance heights, as well as some reference dimensions on wheeled mobility device...
Article
Cyclic trunk flexion/extension is known to be a risk factor for low back pain or disorders. Changes in the in vivo low back musculature associated with cyclic flexion/extension have not been adequately examined. The purpose of this study was to investigate the effects of cyclic flexion/extension on muscle activity of the low back extensors by quant...
Article
In vivo measurements of low back flexion posture and muscle activity before, during, and after static flexion. To identify the occurrence of creep and muscle fatigue development in the low back during static upper body deep flexion that resembled an above ground work posture. Static lumbar flexion has been related to the development of low back dis...
Conference Paper
Full-text available
Current ADA-ABA Accessibility Guidelines characterize functional reach as six discrete scenarios that depict high and low thresholds for permissible reach (1). Findings from anthropometry research measuring the maximum reach abilities of wheeled mobility device users (n=257) during an object moving task are compared with four of these six reach sce...
Conference Paper
Full-text available
Current accessibility standards in the U.S. prescribe reach ranges in overly simplistic terms which also do not reflect reach capabilities of today’s population. This work documents the functional reach abilities of wheeled mobility device users in the U.S as part of a large anthropometric research study. More specifically, it describes the maximum...
Article
Prolonged and/or frequent lumbar flexion posture in industry has been known to contribute to the development of work-related low back pain or disorders but the specific biomechanics of this link has not been fully developed. In this study the effects of static lumbar flexion on back extensor muscles were evaluated by quantifying the changes in the...
Article
Working at or below knee height for extended period of time with the trunk fully flexed has been known to increase the risk of low back disorders, but the specific biomechanics of this link is not fully developed. Of particular interests include the interplay between the active and passive extensor mechanisms of the low back and muscle fatigue deve...
Conference Paper
An anthropometric data collection effort has yielded electromechanical data of three-dimensional landmark coordinates for approximately 300 wheeled mobility device users and their wheelchairs. The development and modeling of static digital models from individual landmark coordinate datasets is described. These models provide a faithful representati...
Article
Minimally invasive surgical techniques using catheter is now used in many procedures. Development of surgical training of such procedures requires real-time simulation of tool-organ interaction. In such processes, each subsequent step of interaction would be based on the current configuration of the surgical tool (guidewire in this case), leading t...