25 research outputs found
Analog and Hybrid Computer Programming De Gruyter graduate./ Bernd Ulmann.
No full textIn English.Includes bibliographical references and index.Analog and hybrid computing recently have gained much interest as analog computers can outperform classical stored-program digital computers in some areas by orders of magnitude. This book gives a thorough introduction to analog and hybrid computer programming by means numerous worked examples from various areas. It is based on a number of introductory and advanced lectures on this topic delivered by the author at several universities.Frontmatter -- Acknowledgments and disclaimer -- Contents -- 1. Introduction -- 2. Computing elements -- 3. Analog computer operation -- 4. Basic programming -- 5. Special functions -- 6. Examples -- 7. Hybrid computing -- 8. Summary and outlook -- APPENDIX A. Solving the heat equation with a passive network -- APPENDIX B. The Laplace transform -- APPENDIX C. Mikusinski's operational calculus -- APPENDIX D. An oscilloscope multiplexer -- APPENDIX E.A log() function generator -- APPENDIX F.A sine/cosine generator -- APPENDIX G.A simple joystick interface -- APPENDIX H. The Analog Paradigm bus system -- APPENDIX I. HyCon commands -- Bibliography -- Index1 online resource (XIV, 268 pages
Analog Computing - past, present, future?
No full textAs classic stored-program digital computers are reaching physical and practical limits with respect to clock frequency, integration density, and suffer from problems like Amdahl's law, unconventional approaches to high-speed and/or high-energy-efficient computing can offer a path to more computing power at lower power consumption.One of these approaches are analog computers which solve problems by means of analog electronic models of the underlying mathematical equations. Largely forgotten since the late 1970s, analog computers are about to return in the form of fully reconfigurable integrated circuits. Coupling these with traditional digital computers yields so-called hybrid computers which combine the best of two worlds, the programmability and vast program libraries available for digital computers as well as the high performance and low power consumption of analog computers. This talk briefly covers the history of analog computing, gives examples of current applications and future developments.
About the speaker
Bernd Ulmann is a professor for business computer science at the FOM University of Applied Sciences in Frankfurt/Germany. He studied mathematics and philosophy at the university of Mainz, He received his PHD at the university of Hamburg for a thesis about history and technology of analog computing.
Since 2000 he maintains a museum with mainframes and a world-wide unique collection of analog computers in Germany. He recently presented the on-board control system for the german A4/V2 rocket and Helmut Hoelzer's first general purpose analog computer at the NASA Apollo 11 50th anniversary in Huntsville.
Bernd Ulmann is author of several books in the field of analog computing. In 1999 he founded the company Raven Technology GmbH - today incorporating the team of Analog Paradigm (http://analogparadigm.com), which is developing and selling analog and hybrid computers.
Today he is one of few world-wide renowned experts for analog computing technology.</p
SOMATISKIE FRAZEOLOĢISMI K. ULMAŅA LATVIEŠU-VĀCU VĀRDNĪCĀ (1872) UN K. ULMAŅA / G. BRAŽES VĀCU-LATVIEŠU VĀRDNĪCĀ (1880)
No full textThe paper analyses Latvian and German somatic idioms in the dictionaries by K. Ulmann and K. Ulmann / G. Braže. Up to now the researchers of Latvian phraseology have not focused to analyse these theme – especially in diachronic aspect. The paper presents the most fixed somatic idioms in the Latvian and German and their equivalence types. The author compares with the meanings of idioms from the first dictionary (1638) to modern electronic dictionary “Modern Latvian dictionary”.KEY WORDS: the dictionaries by K. Ulmann and K. Ulmann / G. Braže, somatic idioms, somatic components, the equivalence types of German–Latvian somatic idioms.DOI: http://dx.doi.org/10.15181/rh.v19i0.132
Mycobacteria in Water Used for Personal Hygiene in Heavy Industry and Collieries: A Potential Risk for Employees
No full textEnvironmental mycobacteria (EM) constitute a health risk, particularly for immunocompromised people. Workers in heavy industry and in collieries represent an at-risk group of people as their immunity is often weakened by long-term employment in dusty environments, frequent smoking and an increased occurrence of pulmonary diseases. This study was concerned with the presence of EM in non-drinking water used for the hygiene of employees in six large industrial companies and collieries. Over a period of ten years, 1096 samples of surface water treated for hygiene purposes (treated surface water) and treated surface water diluted with mining water were examined. EM were detected in 63.4 and 41.5% samples of treated surface water and treated surface water diluted with mining water, respectively. Mycobacterium gordonae, M. avium-intracellulare and M. kansasii were the most frequently detected species. Adoption of suitable precautions should be enforced to reduce the incidence of mycobacteria in shower water and to decrease the infectious pressure on employees belonging to an at-risk group of people
Clinical Relevance and Environmental Prevalence of <i>Mycobacterium fortuitum</i> Group Members. Comment on Mugetti et al. Gene Sequencing and Phylogenetic Analysis: Powerful Tools for an Improved Diagnosis of Fish Mycobacteriosis Caused by <i>Mycobacterium fortuitum</i> Group Members. <i>Microorganisms</i> 2021, <i>9</i>, 797
No full textMycobacterium fortuitum group (MFG) members are able to cause clinical mycobacteriosis in fish and other animals including humans. M. alvei, M. arceuilense, M. brisbanense, M. conceptionense, M. fortuitum, M. peregrinum, M. porcinum, M. senegalense, M. septicum, and M. setense were isolated from fish with mycobacteriosis. In other animals only three MFG species have been isolated: M. arceuilense from camels’ milk, M. farcinogenes from cutaneous infections often described as “farcy”, and M. fortuitum from different domestic and wild mammals’ species. Out of 17, only 3 MFG species (M. arceuilense, M. lutetiense and M. montmartrense) have never been reported in humans. A total of eight MFG members (M. alvei, M. brisbanense, M. conceptionense, M. fortuitum subsp. acetamidolyticum, M. houstonense, M. peregrinum, M. porcinum, and M. septicum) have been isolated from both pulmonary and extrathoracic locations. In extrathoracic tissues five MFG species (M. boenickei, M. farcinogenes, M. neworleansense, M. senegalense, and M. setense) have been diagnosed and only one MFG member (M. fortuitum subsp. acetamidolyticum) has been isolated from pulmonary infection
Absorptiemetingen van chloorgas aan water
No full textApplied SciencesKramers Laboratorium voor Fysische Technologi
Nontuberculous Mycobacteria as Sapronoses: A Review
No full textMycobacteria are a unique group of microorganisms. They are characterised by exceptional adaptability and durability. They are capable of colonisation and survival even in very unfavourable conditions. In addition to the well-known obligate human pathogens, Mycobacterium tuberculosis and M. leprae, more than 200 other species have been described. Most of them form a natural part of the microflora of the external environment and thrive in aquatic and soil environments especially. For many of the mycobacterial species associated with human disease, their natural source has not yet been identified. From an ecological point of view, mycobacteria are saprophytes, and their application in human and animal diseases is opportunistic. Most cases of human disease from saprophytic mycobacteria occur in immunocompromised individuals. This adaptability and resilience to environmental pressures makes treatment of mycobacterial diseases (most often sapronoses and less often zoonoses) and permanent eradication of mycobacteria from the environment very difficult. Saprophytic mycobacterial diseases (sapronoses) are chronic and recurrent due to the fact of repeated endogenous or exogenous re-exposure. Therefore, knowledge regarding their occurrence in soil and dust would aid in the prevention of saprophytic mycobacterioses. In conjunction, their presence and ecological significance in the environment can be revealed
Nontuberculous Mycobacteria: Ecology and Impact on Animal and Human Health
No full textNontuberculous mycobacteria (NTM) represent an important group of environmentally saprophytic and potentially pathogenic bacteria that can cause serious mycobacterioses in humans and animals. The sources of infections often remain undetected except for soil- or water-borne, water-washed, water-based, or water-related infections caused by groups of the Mycobacterium (M.) avium complex; M. fortuitum; and other NTM species, including M. marinum infection, known as fish tank granuloma, and M. ulcerans infection, which is described as a Buruli ulcer. NTM could be considered as water-borne, air-borne, and soil-borne pathogens (sapronoses). A lot of clinically relevant NTM species could be considered due to the enormity of published data on permanent, periodic, transient, and incidental sapronoses. Interest is currently increasing in mycobacterioses diagnosed in humans and husbandry animals (esp. pigs) caused by NTM species present in peat bogs, potting soil, garden peat, bat and bird guano, and other matrices used as garden fertilizers. NTM are present in dust particles and in water aerosols, which represent certain factors during aerogenous infection in immunosuppressed host organisms during hospitalization, speleotherapy, and leisure activities. For this Special Issue, a collection of articles providing a current view of the research on NTM—including the clinical relevance, therapy, prevention of mycobacterioses, epidemiology, and ecology—are addressed
Daily life in nursery, about invisible work
No full textEste artigo apresenta o trabalho de algumas profissionais da primeira infância em duas creches. A partir de um procedimento de tipo etnográfico, ele mostra as tensões vividas silenciosamente por essas mulheres e questiona suas consequências, tanto sobre sua saúde como sobre seu modo de agir com as crianças. Observadora implicada, mas também interlocutora dessas profissionais, a autora se apoia no que vê e sente, a fim de produzir uma reflexão conjunta com elas sobre as dimensões éticas de situações aparentemente ordinárias.This field research presents the day to day work of early childhood education practitioners in two day-nurseries. Using an ethnographic approach and participant observation, the author describes the tensions silently experienced by these practitioners, most of them women. The author also analyses how these tensions affect their health and their relationships with the children they take care of. An Involved observer and discussion partner, her subjective perceptions and observations become a source for group discussion about how ethical issues affect apparently ordinary situations
L’intervenant dans l’espace : ce que l’espace fait à la formation
No full textInternational audienceThis article analyses the use and functions of space in training. After clarifying the notion of space in its conceptual field, the author proposes three training and intervention situations that enable her to explain pedagogical concepts which, even if they remain unspoken, are no less influential in the way the relationship with learners is constructed. She approaches space not as a topographical notion but as an « invested » notion that contributes to the development of living work. This phenomenological conception of space leads her to hypothesise that polyspatiality is necessary for the development of thinking in training.Cet article analyse l’usage et les fonctions de l’espace en formation. Après avoir précisé la notion d’espace dans son champ notionnel, l’auteure propose trois situations de formation et d’intervention lui permettant d’expliciter des conceptions pédagogiques qui, même si elles restent insues, n’en sont pas moins agissantes dans la manière de construire la relation aux apprenants. Elle aborde l’espace non pas comme une notion topographique mais comme une notion « investie », qui contribue au développement d’un travail vivant. Cette conception phénoménologique de l’espace la conduit à faire l’hypothèse de la nécessité d’une polyspatialité pour développer un travail de pensée en formation
