Toward Effective Knowledge Discovery in Social Media Streams

The last few decades have seen an unprecedented growth in the amount of new data. New computing and communications resources, such as cloud data platforms and mo- bile devices have enabled individuals to contribute new ideas, share points of view and exchange newsworthy bits with each other at a previously unfathomable rate. While there are many ways a modern person can communicate digitally with others, social media outlets, such as Twitter or Facebook have been occupying much of the focus of inter-person social networking in recent years. The millions of pieces of content published on social media sites have been both a blessing and a curse for those trying to make sense of the discourse. On one hand, the sheer amount of easily available, real time, contextually relevant content has been a cause of much excitement in academia and the industry. On the other hand, however, the amount of new diverse content that is being continuously published on social sites makes it difficult for researchers and industry participants to effectively grasp. Therefore, the goal of this thesis is to discover a set of approaches and techniques that would help enable data miners to quickly develop intuitions regarding the happenings in the social media space. To that aim, I concentrate on effectively visualizing social media streams as hierarchical structures, as such structures have been shown to be useful in human sense makingPh.D., Information Studies -- Drexel University, 201

NIOSH practices in occupational risk assessment

cdc:85505Minor revisions were made to the frontmatter to indicate actual publication in March 2020. A new DOI number was inserted. It is as follows, https://doi.org/10.26616/NIOSHPUB2020106re- vised032020."Exposure to on-the-job health hazards is a problem faced by workers worldwide. Unlike safety hazards that may lead to injury, health hazards can lead to various types of illness. For example, exposures to some chemicals used in work processes may cause immediate sensory irritation (e.g., stinging or burning eyes, dry throat, cough); in other cases, workplace chemicals may cause cancer in workers many years after exposure. There are millions of U.S. workers exposed to chemicals in their work each year. In order to make recommendations for working safely in the presence of chemical hazards, the National Institute for Occupational Safety and Health (NIOSH) conducts risk assessments. In simple terms, risk assessment is a way of relating a hazard, like a toxic chemical in the air, to potential health risks associated with exposure to that hazard. Risk assessment allows NIOSH to make recommendations for controlling exposures in the workplace to reduce health risks. This document describes the process and logic NIOSH uses to conduct risk assessments, including the following steps: 1) Determining what type of hazard is associated with a chemical or other agent; 2) Collating the scientific evidence indicating whether the chemical or other agent causes illness or injury; 3) Evaluating the scientific data and determining how much exposure to the chemical or other agent would be harmful to workers; and 4) Carefully considering all relevant evidence to make the best, scientifically supported decisions. NIOSH researchers publish risk assessments in peer-reviewed scientific journals and in NIOSH-numbered documents. NIOSH-numbered publications also provide recommendations aimed to improve worker safety and health that stem from risk assessment." NIOSHTIC-2NIOSHTIC no. 20058814Suggested citation: NIOSH [2020]. Current intelligence bulletin 69: NIOSH practices in occupational risk assessment. By Daniels RD, Gilbert SJ, Kuppusamy SP, Kuempel ED, Park RM, Pandalai SP, Smith RJ, Wheeler MW, Whittaker C, Schulte PA. Cincinnati, OH: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health. DHHS (NIOSH) Publication No. 2020-106, (Revised 03/2020) https://doi.org/10.26616/NIOSHPUB2020106revised0320202020-106revised032020.pdf?id=10.26616/NIOSHPUB2020106202010.26616/NIOSHPUB2020106revised032020733

NIOSH practices in occupational risk assessment

"Exposure to on-the-job health hazards is a problem faced by workers worldwide. Unlike safety hazards that may lead to injury, health hazards can lead to various types of illness. For example, exposures to some chemicals used in work processes may cause immediate sensory irritation (e.g., stinging or burning eyes, dry throat, cough); in other cases, workplace chemicals may cause cancer in workers many years after exposure. There are millions of U.S. workers exposed to chemicals in their work each year. In order to make recommendations for working safely in the presence of chemical hazards, the National Institute for Occupational Safety and Health (NIOSH) conducts risk assessments. In simple terms, risk assessment is a way of relating a hazard, like a toxic chemical in the air, to potential health risks associated with exposure to that hazard. Risk assessment allows NIOSH to make recommendations for controlling exposures in the workplace to reduce health risks. This document describes the process and logic NIOSH uses to conduct risk assessments, including the following steps: 1) Determining what type of hazard is associated with a chemical or other agent; 2) Collating the scientific evidence indicating whether the chemical or other agent causes illness or injury; 3) Evaluating the scientific data and determining how much exposure to the chemical or other agent would be harmful to workers; and 4) Carefully considering all relevant evidence to make the best, scientifically supported decisions. NIOSH researchers publish risk assessments in peer-reviewed scientific journals and in NIOSH-numbered documents. NIOSH-numbered publications also provide recommendations aimed to improve worker safety and health that stem from risk assessment." NIOSHTIC-2NIOSHTIC no. 20058767Suggested citation: NIOSH [2019]. Current intelligence bulletin 69: NIOSH practices in occupational risk assessment. By Daniels RD, Gilbert SJ, Kuppusamy SP, Kuempel ED, Park RM, Pandalai SP, Smith RJ, Wheeler MW, Whittaker C, Schulte PA. Cincinnati, OH: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health. DHHS (NIOSH) Publication No. 2020-106, https://doi.org/10.26616/NIOSHPUB20201062020-106.pdf?id=10.26616/NIOSHPUB2020106202010.26616/NIOSHPUB2020106728

Assessing Atmospheric Pollution and Its Impacts on the Human Health

This reprint contains articles published in the Special Issue entitled "Assessing Atmospheric Pollution and Its Impacts on the Human Health" in the journal Atmosphere. The research focuses on the evaluation of atmospheric pollution by statistical methods on the one hand, and on the other hand, on the evaluation of the relationship between the level of pollution and the extent of its effect on the population's health, especially on pulmonary diseases

Late lessons from early warnings: science, precaution, innovation

'There was a strange stillness. The birds for example — where had they gone? Many people spoke about them, puzzled and disturbed. The feeding stations in the backyards were deserted. The few birds seen anywhere were moribund: they trembled violently and could not fly. It was a spring without voices ... only silence lay over the fields and woods and marsh.' The book Silent Spring by Rachel Carson is mainly about the impacts of chemicals (in particular in particular dichlorodiphenyltrichlorethane also known as DDT) on the environment and human health. Indeed, the close association between humans and birds remains very apt. Representing the only two warm-blooded groups of life on Earth, mammals and birds share the same environments and threats. Carson's claim that she lived in 'an era dominated by industry, in which the right to make a dollar at whatever cost is seldom challenged' still resonates strongly with the problems that societies face all over the world. One chapter heading, 'The obligation to endure', derived from the French biologist and philosopher Jean Rostand's famous observation that, 'the obligation to endure gives us the right to know'. United States President John F. Kennedy responded to the challenge posed by Carson by investigating DDT, leading to its complete ban in the US. The ban was followed by a range of institutions and regulations concerned with environmental issues in the US and elsewhere, driven by public demand for knowledge and protection. DDT was the primary tool used in the first global malaria eradication programme during the 1950s and 1960s. The insecticide is sprayed on the inner walls and ceilings of houses. Malaria has been successfully eliminated from many regions but remains endemic in large parts of the world. DDT remains one of the 12 insecticides — and the only organochlorine compound — currently recommended by the World Health Organization (WHO), and under the Stockholm Convention on Persistent Organic Pollutants, countries may continue to use DDT. Global annual use of DDT for disease vector control is estimated at more than 5 000 tonnes. It is clear that the social conscience awakened by Rachel Carson 50 years ago gave momentum to a groundswell of actions and interventions that are slowly but steadily making inroads at myriad levels. Chapter 17 of her book, 'The other road' reminds the reader of the opportunities that should have been seized much earlier. With more than 10 % of bird species worldwide now threatened in one way or another, it is clear that we missed early warnings or failed to act on them. Will we continue to miss signposts to 'other roads'? Are our obligations to endure met by our rights to know? As Carson said 50 years ago: 'The choice, after all, is ours to make.

Aerospace medicine and biology: A cumulative index to a continuing bibliography (supplement 384)

This publication is a cumulative index to the abstracts contained in Supplements 372 through 383 of Aerospace Medicine and Biology: A Continuing Bibliography. It includes seven indexes: subject, personal author, corporate source, foreign technology, contract number, report number, and accession number