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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
301

Development of a Real-Time Safety System for Robotic Arms Using Computer Vision and Predictive Modeling : Enhancing Industrial Safety through YOLOv8, Kalman Filtering, and Dead Reckoning

Arabzadeh, Koray Aman January 2024 (has links)
I industriella miljöer är det avgörande att säkerställa människors säkerhet runt robotarmar för att förhindra allvarliga skador vid olyckor. Denna studie syftar till att utveckla ett realtidssystem för fara-detektering som använder datorseende och prediktiva modeller för att förbättra säkerheten. Genom att kombinera YOLOv8-algoritmen för objektigenkänning med Kalmanfiltrering (KF) och Dead Reckoning (DR) kan systemet upptäcka människors närvaro och förutsäga rörelser för att minska risken för olyckor. Det första experimentet visar att KF presterar bättre än DR, särskilt vid linjära rörelser, med lägre medelabsolutfel (MAE) och medelkvadratfel (MSE). Det andra experimentet visar att integrationen av KF med YOLOv8 resulterar i högre precision, noggrannhet och balanserad noggrannhet, även om återkallning fortfarande behöver förbättras. Dessa resultat indikerar att kombinationen av datorseende och prediktiva modeller har betydande potential att förbättra människors säkerhet. Ytterligare forskning och tester i olika scenarier är dock nödvändiga innan implementering i verkliga miljöer. / In industrial environments, ensuring human safety around robotic arms is crucial to prevent severe injuries from accidents. This study aims to develop a real-time hazard detection system using computer vision and predictive modeling techniques to improve safety. By combining the YOLOv8 object detection algorithm with Kalman Filtering (KF) and Dead Reckoning (DR), the system can detect human presence and predict movements to reduce the risk of accidents. The first experiment shows that KF outperforms DR, especially in linear movements, with lower Mean Absolute Error (MAE) and Mean Squared Error (MSE). The second experiment demonstrates that integrating KF with YOLOv8 results in higher precision, accuracy, and balanced accuracy, although recall still needs improvement. These findings indicate that combining computer vision with predictive modeling has significant potential to enhance human safety. However, further research and testing in diverse scenarios are necessary before real-world deployment.
302

The control and management of dangerous substances and chemicals in Hong Kong

Chan, Wai-man., 陳偉文. January 1998 (has links)
published_or_final_version / Environmental Management / Master / Master of Science in Environmental Management
303

Percepções do fator acidentário de prevenção: o (in)sustentável meio ambiente do trabalho na pós-modernidade

Fortes, Vinícius Borges 12 April 2011 (has links)
A pesquisa aborda as percepções do Fator Acidentário de Prevenção como instrumento normativo para o alcance da sustentabilidade no meio ambiente do trabalho. Buscar a sustentabilidade no plano das relações de trabalho conduz à garantia de um ambiente laboral digno às presentes e futuras gerações de trabalhadores. Diante disso, a pesquisa atinge seus objetivos ao expor uma análise histórico-sociológica da transição do trabalho como formação biológico-evolutiva do ser humano à necessidade biológico-social pelo trabalho, abordando o meio ambiente do trabalho e as significativas transformações dos processos produtivos. Outrossim, a pesquisa demonstra a relevância do princípio da precaução para a construção de um meio ambiente do trabalho seguro, saudável e, sobretudo, sustentável, bem como aponta o Fator Acidentário de Prevenção (FAP) como instrumento normativo para a sustentabilidade do ambiente laboral. A pesquisa tem natureza qualitativo-exploratória, tendo utilizado como técnicas de coleta de dados a observação direta e a entrevista semiestruturada para identificar a percepção de seis observadores das relações de trabalho em relação ao FAP. Além disso, a pesquisa desenvolveu-se com uma sequência metodológica dividida em três fases: fase preliminar estado da arte , onde foram analisados os referenciais teóricobibliográficos, que fundamentaram a pesquisa de campo, denominada fase de coleta de dados , e a fase analítico-conclusiva , onde ocorreu a análise e discussão dos dados coletados. A pesquisa é dotada de embasamento metodológico que permitiu retratar o contexto fático do meio ambiente do trabalho e do Fator Acidentário de Prevenção sob o olhar do Ministério do Trabalho e Emprego, Ministério Público do Trabalho, INSS, Justiça do Trabalho, representante da classe dos empregados e representante da classe dos empregadores. / Submitted by Marcelo Teixeira (mvteixeira@ucs.br) on 2014-06-04T17:57:32Z No. of bitstreams: 1 Dissertacao Vinicius Borges Fortes.pdf: 1001126 bytes, checksum: c0e40811f9e71899ec7245cd545af372 (MD5) / Made available in DSpace on 2014-06-04T17:57:32Z (GMT). No. of bitstreams: 1 Dissertacao Vinicius Borges Fortes.pdf: 1001126 bytes, checksum: c0e40811f9e71899ec7245cd545af372 (MD5) / The research approaches the perceptions of Accident Prevention Factor as a normative instrument for achieving sustainability in the environment of work. Seeking sustainability in terms of labor relations leads to ensuring a decent working environment for present and future generations of workers. Given this, the research achieves its objectives by exposing a historical-sociological analysis of the transition from working as biological-evolutionary training of human beings to the need for biological and social work, approaching the environment of work and the significant transformations of production processes. Moreover, research demonstrates the relevance of the precautionary principle to build a working environment safe, healthy and above all, sustainable, and points to the Accident Prevention Factor (APF) as a regulatory tool for the sustainability of the work environment. The research has qualitative and exploratory nature, and used as data collection techniques the direct observation and semistructured interviews to identify the perception of six observers of labor relations about the APF. Moreover, the research was developed with a methodological sequence divided into three phases: preliminary phase - "state of the art", which analyzed the theoretical and bibliographic, which motivated the research field, called "phase of data collection" and "Analytical-conclusive phase" that was a discussion and analysis of data collected. The research is endowed with a methodological basis that allowed portray the factual context of the environment of work and Accident Prevention Factor under the gaze of the Ministry of Labor and Employment, Labour Prosecutor, Social Security, Labour Justice, representing the class of employees and representative of the class of employers.
304

Percepções do fator acidentário de prevenção: o (in)sustentável meio ambiente do trabalho na pós-modernidade

Fortes, Vinícius Borges 12 April 2011 (has links)
A pesquisa aborda as percepções do Fator Acidentário de Prevenção como instrumento normativo para o alcance da sustentabilidade no meio ambiente do trabalho. Buscar a sustentabilidade no plano das relações de trabalho conduz à garantia de um ambiente laboral digno às presentes e futuras gerações de trabalhadores. Diante disso, a pesquisa atinge seus objetivos ao expor uma análise histórico-sociológica da transição do trabalho como formação biológico-evolutiva do ser humano à necessidade biológico-social pelo trabalho, abordando o meio ambiente do trabalho e as significativas transformações dos processos produtivos. Outrossim, a pesquisa demonstra a relevância do princípio da precaução para a construção de um meio ambiente do trabalho seguro, saudável e, sobretudo, sustentável, bem como aponta o Fator Acidentário de Prevenção (FAP) como instrumento normativo para a sustentabilidade do ambiente laboral. A pesquisa tem natureza qualitativo-exploratória, tendo utilizado como técnicas de coleta de dados a observação direta e a entrevista semiestruturada para identificar a percepção de seis observadores das relações de trabalho em relação ao FAP. Além disso, a pesquisa desenvolveu-se com uma sequência metodológica dividida em três fases: fase preliminar estado da arte , onde foram analisados os referenciais teóricobibliográficos, que fundamentaram a pesquisa de campo, denominada fase de coleta de dados , e a fase analítico-conclusiva , onde ocorreu a análise e discussão dos dados coletados. A pesquisa é dotada de embasamento metodológico que permitiu retratar o contexto fático do meio ambiente do trabalho e do Fator Acidentário de Prevenção sob o olhar do Ministério do Trabalho e Emprego, Ministério Público do Trabalho, INSS, Justiça do Trabalho, representante da classe dos empregados e representante da classe dos empregadores. / The research approaches the perceptions of Accident Prevention Factor as a normative instrument for achieving sustainability in the environment of work. Seeking sustainability in terms of labor relations leads to ensuring a decent working environment for present and future generations of workers. Given this, the research achieves its objectives by exposing a historical-sociological analysis of the transition from working as biological-evolutionary training of human beings to the need for biological and social work, approaching the environment of work and the significant transformations of production processes. Moreover, research demonstrates the relevance of the precautionary principle to build a working environment safe, healthy and above all, sustainable, and points to the Accident Prevention Factor (APF) as a regulatory tool for the sustainability of the work environment. The research has qualitative and exploratory nature, and used as data collection techniques the direct observation and semistructured interviews to identify the perception of six observers of labor relations about the APF. Moreover, the research was developed with a methodological sequence divided into three phases: preliminary phase - "state of the art", which analyzed the theoretical and bibliographic, which motivated the research field, called "phase of data collection" and "Analytical-conclusive phase" that was a discussion and analysis of data collected. The research is endowed with a methodological basis that allowed portray the factual context of the environment of work and Accident Prevention Factor under the gaze of the Ministry of Labor and Employment, Labour Prosecutor, Social Security, Labour Justice, representing the class of employees and representative of the class of employers.
305

A preliminary development and validation of a measure of safety performance

Yuan, Zhenyu January 2014 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / Safety researchers have devoted extensive attention to safety performance behaviors. However, current safety performance models have yet to differentiate between safety citizenship behaviors directed towards the organization and those directed towards individuals. This might be a potential oversight, considering that citizenship behaviors targeted at different beneficiaries might be associated with different antecedents. As such, the purpose of the present study was to develop and validate a new safety performance scale. Items from existing measures formed the item pool and those tapping into the proposed dimensions were selected. Next, items were pilot tested using an online panel of 333 employees from various safety-related industries. A 4-factor structure emerged after exploratory factor analysis and the scale was further refined using reliability analysis and item response theory analysis. Finally, confirmatory factor analysis was conducted to replicate the factor structure using data from 137 employees. Theoretically related variables were correlated with the safety performance dimensions to establish the nomological network. Results supported the 4-factor structure of the new safety performance scale and construct validation hypotheses were largely supported. Implications, study limitations, and directions for future research are discussed.
306

The contribution of leadership behaviour in creating a safety conscious organisational culture : a case study of Anglo American mining operations

McLeod, Ashley 12 1900 (has links)
Thesis (MBA (Business Management))--Stellenbosch University, 2008. / ENGLISH ABSTRACT: In the 20th century, many employees in the South African mining industry were involved in occupational accidents which either resulted in personal injury or had fatal consequences. Despite the introduction of numerous industrial safety programmes to prevent fatal incidents and minor injuries, the South African mining industry death toll remains consistently high, at approximately 200 employees per annum. The trend of employee injury and death continues unabated into the new millennium. This safety performance has been met with growing dissatisfaction in the ranks of government, worker unions, employees and business stakeholders. This dissatisfaction is directed at chief executives who are being blamed for the occupational accidents on their mines. There is now growing focus on the leadership of mining companies and how it contributes to shaping an organisational culture for improved safety performance. The researcher examines whether leadership is a key component in creating a safety conscious organisational culture, and uses literature studies and the Anglo American mining company as a practical case study to support the investigation. Anglo American, listed on the Johannesburg and London stock exchanges is the largest mining company in South Africa and also one in which many fatal injuries have occurred; providing an abundance of safety information. The researcher reviews previous literature studies and explains the journey Anglo American undertook to improve its safety performance since listing on the London Stock Exchange in 1999. The concepts of organisational culture, safety culture, leadership and organisational performance, are discussed from a theoretical and practical perspective using literature studies. These are then examined with the ultimate view of understanding their practical impact on organisational safety as espoused in the literature. The literature provides a broad framework on which to assess Anglo American's safety journey from 1999 to the end of 2007. This journey details the safety programmes and efforts employed by Anglo American to eliminate fatalities and injuries and also highlights the impact of the organisation's leadership on the safety performance of the company. It is concluded that the contribution of leadership is pivotal to establishing a safety-conscious organisational culture and that specific behaviours from executives, senior managers, middle managers, supervisors and workers are needed to develop an organisations safety culture for improved safety performance. / AFRIKAANSE OPSOMMING: Gedurende die 20ste eeu was baie werkers in die Suid-Afrikaanse mynbedryf betrokke in beroepsverwante ongelukke wat tot persoonlike beserings of lewensverlies gelei het. Ten spyte van die instelling van veelvuldige beroeps-veiligheidsprogramme om noodlottige insidente en ander minder ernstige beserings te voorkom, bly die dodetal in die Suid-Afrikaanse mynbedryf konstant hoog, teen ongeveer 200 werkers per jaar. Hierdie tendens van dood en beserings onder werkers gaan ongetem voort tot in die nuwe millennium. Hierdie veiligheidsrekord word met toenemende ontevredenheid deur die regering, werkers-vakbonde, werkers en bedryfsinsethouers beskou. Hierdie ontevredenheid word gemik op uitvoerende bestuur, wie blameer word vir beroepsverwante ongelukke in hul myne. Daar word dus toenemend gefokus op die leierskap van mynmaatskappye en hoe dit bydra tot die skepping van 'n organisasiekultuur van verbeterde veiligheidsuitslae. Die navorser ondersoek die vraag of leierskap 'n kern komponent is in die daarstelling van 'n veiligheids-bewuste organisasiekultuur, en maak gebruik van literatuurstudies sowel as Anglo American mynmaatskappy as 'n praktiese gevallestudie om sy ondersoek te ondersteun. Anglo American is die grootste mynmaatskappy in Suid-Afrika en ook die een waar baie noodlottige ongelukke voorgekom het, en dus 'n groot bron van veiligheidsinligting kan voorsien. Die navorser hersien teoretiese literatuurstudies en verduidelik dan die optrede van Anglo American om sy veiligheidsrekords te verbeter sedert sy noteering op die Londonse Effektebeurs in 1999. Die konsep van organisasiekultuur, veiligheidskultuur, leierskap en organisasieprestasie, word bespreek vanuit 'n teoretiese en praktiese perspektief met behulp van literatuurstudies en hierdie word bestudeer met die uiteindelike doel om die praktiese impak daarvan in industrie te verstaan soos uiteengesit in die literatuur. Die literatuur voorsien 'n breë raamwerk waarteen Anglo American se veiligheidstog gemeet kan word vanaf 1999 tot einde 2007. Hierdie tog verskaf detail van hoe Anglo American veiligheidsprogramme gebruik het om noodlottigge ongelukke en beserings uit te skakel en beklemtoon ook die impak van die organisasie se leierskap op die veiligheidsrekord van die maatskappy. Die gevolgtrekking word gemaak dat die bydrae van leierskap kern is tot die daarstelling van 'n veiligheidsbewuste kultuur en dat spesifieke optredes van hoofbestuurders, seniorbestuurders, middelvlakbestuurders, opsieners en werkers nodig is om 'n veiligheidskultuur te bewerkstellig om veiligheid in maatskappye te verbeter.
307

Refining a more complete theory of environment, safety, and health management strategy using case studies

Maxwell, Elisabeth D. 09 December 2011 (has links)
Environment, safety and health (ESH) research has a strong tradition of conducting research in manufacturing to improve workplace ESH conditions and has tied its management strategy and technical practices to many significant priorities: illness and injury prevention, environmental sustainability, corporate social responsibility, compliance with regulatory and insurance requirements, and dealing with NGO (non-governmental organization) pressures. ESH research rarely examines ESH management strategy in the broader context of business/operations. This oversight makes it difficult to make accurate recommendations for practice and regulation because ESH researchers and business/operations researchers tend to function as if the other does not exist with the very great possibility that key relationships remain undiscovered. In this study, case study methods were used with five manufacturing facilities in the Pacific Northwest to evaluate the usefulness of the Development Levels Rating System (DLRS). Data were collected using interviews, site tours, and publicly available records. Within case and cross-case analysis were used to analyze the data. Consistent patterns were found in how the facilities structured, organized, and financed the ESH function. Moreover, important insights were found regarding the facilities' levels of ESH management strategy and their levels of risk. The results support the DLRS model as being useful in assessing ESH management strategy in relation to a facility's level of risk. Moreover, several new pathways were uncovered including: the significance of multi-stakeholder approaches in EHS and operations research; the importance of joint management strategies; and the faulty nature of compliance-based ESH management strategies. Future research should be considered to test the DLRS tool using focus groups and quantitative methods. This study was approved by the Institutional Review Board (IRB). / Graduation date: 2012
308

Employees' adherence to the Occupational Health and Safety Act in the steel manufacturing sector

Mojapelo, Jerry 09 1900 (has links)
M. Tech. (Labour Relations Management, Faculty of Management Sciences), Vaal University of Technology. / Industrial accidents have proved to be more prevalent and costly than anticipated especially in developing countries including South Africa. Occupational accidents have direct and indirect cost implications for an organisation as well as society. Governments in many countries have tried to implement legislation to try and curb the scourge of industrial accidents. The primary purpose of this research was to investigate the level of employee adherence to the Occupational, Health and Safety Act (OHSA) 85 of 1993 in the steel manufacturing sector. This research provided an overview of various factors that influences employee’s level of understanding and adherence to the OHSA. This included factors such as information and training in health and safety; employee safety perception, employee safety awareness, employee safety adherence, employee behaviour with regard to health and safety, the role of the union in health and safety issues, accident reporting mechanism, and employee’s perceptions of the influence of rewards on health and safety. A structured questionnaire consisting of closed-ended questions was developed and disseminated in order to gather relevant data. Given the scale of the research, a quantitative research method was implemented. The population for the study strictly consisted of employees working in the steel manufacturing sector. A purposive sampling technique was selected. Statistical Package for Social Sciences 22.0 (SPSS) was used to analyse the data. The sample size of (n) =165 employees was involved in the study. The response rate for the total was (98.5%). Descriptive, frequency, correlation, regression and means analysis was employed in this study. The results of the study indicated that majority of the employees were aware and adhered with the requirements of the OHSA with the organisation. It was suggested that strong stake holder partnerships between unions, employers and employees be formulated. The state should reinforce the Department of Labour inspectorate by giving it more powers to be able to execute its task meritoriously and efficiently. It further suggested that the state must rapidly focus on recruiting and training more health and safety labour inspectors to ensure appropriate enforcement of health and safety regulations. Lastly it is advisable to create and engrave a health and safety culture within the organisation that focuses on highly on employee involvement and mutual trust. The proposed recommendation for the study, limitations and the conclusion of the study were outlined in Chapter 5.
309

An analysis of workplace amputation injuries in Florida [electronic resource] / by Eve N. Hanna.

Hanna, Eve N. January 2003 (has links)
Title from PDF of title page. / Document formatted into pages; contains 76 pages. / Thesis (M.S.P.H.)--University of South Florida, 2003. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: Nationally, 10,852 workplace amputation injuries in the US were reported in 1997. This number has been gradually decreasing over time to 9,658 amputations in 2000. In Florida, the amputation injuries have been increasing from 272 in 1997 to 417 in 2000. The reason for this increase is unclear and deserves further study. The purpose of a portion of this study was to examine the Federal and Florida BLS data to determine the characteristics of the typical worker with an amputation injury. A worker with an amputation injury was most likely to be a white male between the ages of 35 and 44 with 1 to 5 years of employment. The amputated part was usually a finger which was injured in a machinery source. The purpose of the self-designed survey was to determine if there were any differences in the amputation prevention strategies between companies with and without amputation injuries. / ABSTRACT: The survey also attempted to uncover any changes made to the safety training program after an amputation injury occurred. Using the Florida workers compensation data, surveys were sent to all companies with amputation injuries for the years 1999, 2000, and 2001. An equal number of surveys were sent to companies without amputation injuries during the same years of interest. A total of 840 surveys were mailed out. 146 were returned as undeliverable. 35 surveys were returned in the amputation group and 35 surveys were returned in the control group. All SIC codes were represented except mining. In the amputation group during the years investigated, 15 out of 35 (42.9%) companies claimed amputation injuries and 20 (57%) companies did not. The true error rate for the workers compensation data was a 13% misclassification of amputation injuries into that category. / ABSTRACT: Comparison of the prevention strategies between the amputation and control groups revealed no significant differences. Of the companies claiming amputation injuries, 8 out of 15 (53%) made no changes to their safety training program after the injury occurred. Proactive techniques and global changes in safety culture mindset will be necessary before major reductions in amputation injuries can occur. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.
310

Policies and regulatory frameworks influencing trends of work-related fatalities and severe injuries in the construction industry in Dar-es-Salaam region, Tanzania, 1980-2009.

Matiko, Joshua Mwita. January 2012 (has links)
Introduction Despite the existence of data in the Labour Commissioner’s Accident and Occupational Diseases Register of Tanzania, trends in the frequency of work-related fatalities and severe injuries in the construction industry, in relation to the development of policies and regulatory frameworks over the years and their effectiveness as interventions, have not been systematically evaluated. Aim The aim of this study was to investigate the relationship between the regulatory framework, trends in the frequency of work-related fatalities and severe injuries among construction workers in Dar-es-Salaam Region, Tanzania, from January 1980 to December 2009. Methods The Accident Notification and Register was accessed from the Tanzanian Labour Department. Data were extracted from the register, coded and analyzed using SPSS. Chi square was used to test if injuries and fatalities in the construction industry and non-construction industries are influenced by introduction of regulatory bodies, legislation and policies during the baseline period (1980 – 1981) and subsequent time periods. Dependent variables were cases of injuries and fatalities in the construction industry and in the non-construction industries, while independent variables included duration during which the regulatory bodies, legislation and policies have been operational, age, sex, education and duration of employment. Results The introduction of regulatory bodies, legislation and policies was statistically significant in the reduction of reported cases in the construction industry across all time periods as compared to the baseline period. The adjusted risk of fatalities and work related injuries frequency in the construction industry decreased (OR 0.5; 95% CI 0.4 – 0.6 during 1998 – 2001) in almost all time periods compared to the baseline period except for the period between 1982 and 1985 (OR 1.2; 95% CI 1.0 to 1.3). Discussion This study is the first to be conducted in Tanzania. The study has shown that new governing bodies and the introduction of new policies and legislations that were introduced in the construction sector were effective in terms of reduction of reported accidents. The results of this study are similar to other studies that have conducted elsewhere. The studies that were conducted in US in 2001and 2003 to evaluate regulatory intervention on vertical falls found evidence that introduction of regulations was effective in preventing non-fatal and fatal injuries in the construction industry. Our results could have been confounded by other factors such as improvement of economic status, construction technologies and work practices. Recommendations In addition to establishment of regulatory bodies, legislation and policies to reduce the accidents, the focus should be also to change technology and practices on construction sites. A safety culture should also be emphasized / Thesis (M.Med.Sc.)-University of KwaZulu-Natal, Durban, 2012.

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