Bubble size distribution (BSD) is relevant to the design of gas-liquid systems, as it determines the interfacial area available in heat and mass transfer processes. Although data on BSD in stirred ...aerated tanks are available, a systematic comparison of alternative modeling functions for these data is lacking. In this work, BSDs obtained in air-water dispersions in a stirred aerated tank with a Rushton turbine and BSDs available in the literature for similar systems were modeled by 14 empirical probability density functions (PDFs). It was found that both the distribution of Nukiyama-Tanasawa with three adjustable parameters and the Rosin-Rammler distribution with two adjustable parameters reasonably fit original and literature BSDs. It is also concluded that it is possible to correlate the PDF parameters with the power dissipated by the agitator in the liquid phase, allowing the BSD to be modeled with only two parameters in a range of dissipated power from 0.5 to 2.3 kW/m
3
. BSDs thus modeled provide good predictions of average bubble size.
Full text
Available for:
BFBNIB, DOBA, GIS, IJS, IZUM, KILJ, KISLJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
2.
Resilient health care Hollnagel, Erik; Braithwaite, Jeffrey; Wears, Robert L
2013., 2013, 2013-08-01, 2013-09-28
eBook
Health care is everywhere under tremendous pressure with regard to efficiency, safety, and economic viability - to say nothing of having to meet various political agendas - and has responded by ...eagerly adopting techniques that have been useful in other industries, such as quality management, lean production, and high reliability. This has on the whole been met with limited success because health care as a non-trivial and multifaceted system differs significantly from most traditional industries. In order to allow health care systems to perform as expected and required, it is necessary to have concepts and methods that are able to cope with this complexity. Resilience engineering provides that capacity because its focus is on a system's overall ability to sustain required operations under both expected and unexpected conditions rather than on individual features or qualities. Resilience engineering's unique approach emphasises the usefulness of performance variability, and that successes and failures have the same aetiology. This book contains contributions from acknowledged international experts in health care, organisational studies and patient safety, as well as resilience engineering. Whereas current safety approaches primarily aim to reduce or eliminate the number of things that go wrong, Resilient Health Care aims to increase and improve the number of things that go right. Just as the WHO argues that health is more than the absence of illness, so does Resilient Health Care argue that safety is more than the absence of risk and accidents. This can be achieved by making use of the concrete experiences of resilience engineering, both conceptually (ways of thinking) and practically (ways of acting).
The politics and science of health and disease remain contested terrain among scientists, health practitioners, policy makers, industry, communities, and the public. Stakeholders in disputes about ...illnesses or conditions disagree over their fundamental causes as well as how they should be treated and prevented. This thought-provoking book crosses disciplinary boundaries by engaging with both public health policy and social science, asserting that science, activism, and policy are not separate issues and showing how the contribution of environmental factors in disease is often overlooked.
Affliction inaugurates a novel way of understanding the trajectories of health and disease in the context of poverty. Focusing on low-income neighborhoods in Delhi, it stitches together three ...different sets of issues. First, it examines the different trajectories of illness: What are the circumstances under which illness is absorbed within the normal and when does it exceed the normal putting resources, relationships, and even one's world into jeopardy? A second set of issues involves how different healers understand their own practices. The astonishing range of practitioners found in the local markets in the poor neighborhoods of Delhi shows how the magical and the technical are knotted together in the therapeutic experience of healers and patients. The book asks: What is expert knowledge? What is it that the practitioner knows and what does the patient know? How are these different forms of knowledge brought together in the clinical encounter, broadly defined? How does this event of everyday life bear the traces of larger policies at the national and global levels? Finally, the book interrogates the models of disease prevalence and global programming that emphasize surveillance over care and deflect attention away from the specificities of local worlds. Yet the analysis offered retains an openness to different ways of conceptualizing "what is happening" and stimulates a conversation between different disciplinary orientations to health, disease, and poverty. Most studies of health and disease focus on the encounter between patient and practitioner within the space of the clinic. This book instead privileges the networks of relations, institutions, and knowledge over which the experience of illness is dispersed. Instead of thinking of illness as an event set apart from everyday life, it shows the texture of everyday life, the political economy of neighborhoods, as well as the dark side of care. It helps us see how illness is bound by the contexts in which it occurs, while also showing how illness transcends these contexts to say something about the nature of everyday life and the making of subjects.
Despite a strong commitment to delivering quality health care, persistent problems involving medical errors and ineffective treatment continue to plague the industry. Many of these problems are the ...consequence of poor information and technology (IT) capabilities, and most importantly, the lack cognitive IT support. Clinicians spend a great deal of time sifting through large amounts of raw data, when, ideally, IT systems would place raw data into context with current medical knowledge to provide clinicians with computer models that depict the health status of the patient.Computational Technology for Effective Health Care advocates re-balancing the portfolio of investments in health care IT to place a greater emphasis on providing cognitive support for health care providers, patients, and family caregivers; observing proven principles for success in designing and implementing IT; and accelerating research related to health care in the computer and social sciences and in health/biomedical informatics.Health care professionals, patient safety advocates, as well as IT specialists and engineers, will find this book a useful tool in preparation for crossing the health care IT chasm.
Kalief Browder was 16 when he was arrested in the Bronx for allegedly stealing a backpack. Unable to raise bail and unwilling to plead guilty to a crime he didn't commit, Browder spent three years in ...New York's infamous Rikers Island jail—two in solitary confinement—while awaiting trial. After his case was dismissed in 2013, Browder returned to his family, haunted by his ordeal. Suffering through the lonely hell of solitary, Browder had been violently attacked by fellow prisoners and corrections officers throughout his incarceration. Consumed with depression, Browder committed suicide in 2015. He was just 22 years old.
In Life and Death in Rikers Island, Homer Venters, the former chief medical officer for New York City's jails, explains the profound health risks associated with incarceration. From neglect and sexual abuse to blocked access to care and exposure to brutality, Venters details how jails are designed and run to create new health risks for prisoners—all while forcing doctors and nurses into complicity or silence.
Pairing prisoner experiences with cutting-edge research into prison risk, Venters reveals the disproportionate extent to which the health risks of jail are meted out to those with behavioral health problems and people of color. He also presents compelling data on alternative strategies that can reduce health risks. This revelatory and groundbreaking book concludes with the author's analysis of the case for closing Rikers Island jails and his advice on how to do it for the good of the incarcerated.
Since the 1990s, suicide in recession-plagued Japan has soared, and rates of depression have both increased and received greater public attention. In a nation that has traditionally been ...uncomfortable addressing mental illness, what factors have allowed for the rising medicalization of depression and suicide? Investigating these profound changes from historical, clinical, and sociolegal perspectives, Depression in Japan explores how depression has become a national disease and entered the Japanese lexicon, how psychiatry has responded to the nation's ailing social order, and how, in a remarkable transformation, psychiatry has overcome the longstanding resistance to its intrusion in Japanese life.
In 1988, a new health care system, the Sistema Único de Saúde (Unified Health Care System or SUS) was formally established in Brazil. The system was intended, among other goals, to provide universal ...access to health care services and to redefine health as a citizen's right and a duty of the state. A Right to Health explores how these goals have unfolded within an urban peripheral community located on the edges of the northeastern city of Fortaleza. Focusing on the decade 1998–2008 and the impact of health care reforms on one low-income neighborhood, Jessica Jerome documents the tensions that arose between the ideals of the reforms and their entanglement with pervasive socioeconomic inequality, neoliberal economic policy, and generational tension with the community.Using ethnographic and historical research, the book traces the history of political activism in the community, showing that, since the community's formation in the early 1930s, residents have consistently fought for health care services. In so doing, Jerome develops a multilayered portrait of urban peripheral life and suggests that the notion of health care as a right of each citizen plays a major role not only in the way in which health care is allocated, but, perhaps more importantly, in how health care is understood and experienced.