Sample records for sandris cesnieks arvids
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Sadhana | Indian Academy of Sciences
Indian Academy of Sciences (India)
Home; Journals; Sadhana. Arvid Naess. Articles written in Sadhana. Volume 31 Issue 4 August 2006 pp 429-443. Estimation of failure probabilities of linear dynamic systems by importance sampling · Anna Ivanova Olsen Arvid Naess · More Details Abstract Fulltext PDF. An iterative method for estimating the failure ...
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Tondi Sõjakoolist laia maailma / Piret Kuusik ; juhendajad Merike Jürjo, Reet Viikholm
Kuusik, Piret
2011-01-01
Uurimistöö käsitleb Tondi Sõjakooliga seonduvat ning tolleaegseid etiketi- ja käitumisnorme. Töö annab ülevaate aspirant Arvid Tarsi ning temaga koos õppinud nelja kursuslase isikutest ja nende saatusest
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Rahvavalgustajad, teadlased, kirjanikud... / Helmut Piirimäe
Piirimäe, Helmut, 1930-
1980-01-01
Tartu Ülikooli ajaloost. Naabermaade kultuuriloosse oma tegevusega jälgi jätnud TÜ kasvandikest Georg Manzel (Mancelius), Christian Fürecker, Janis Reiters (Johannes Reuter), Olof (Olaus) Verelius, Isak Börk (Björk), Johannes Terserus, Abraham Thauvonius, Arvid Moller ja Petrus Schomerus
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Systems-theory of psychosis--the relevance of "internal censorship".
Emrich, H M; Leweke, F M; Schneider, U
2006-02-01
The different aspects of the neurobiology of psychotic disorders are presently discussed under the perspective of Arvid Calssons neurochemical theory of mesolimbic/cortico-thalamic loops. In this regard the question as to whether--neuropsychologically--a "filter-defect" or a disturbance of "internal censorship" is causative for psychoses. This topic is discussed in the present paper.
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Aia alt pilvekatusega kunstisaali / Meeli Müüripeal
Müüripeal, Meeli, 1963-
2006-01-01
Sabile restaureeritud sünagoog-kunstisaalist (1890).1993. a. läti skulptori Ojars Arvids Feldbergsi (sünd. 1947) poolt avatud Pedvale keskkonnakunsti keskusest, sealsetest Brinkpedvale (18. sajand) ja Frikspedvale mõisahoonetest. 1999. a. pälvis Pedvale vabaõhu kunstisaal UNESCO Melina Mercouri auhinna. Pedvales on tuleetendusega esinenud Raul Meel, eesti kunstnike töödest nimetatud Villu Jaanisoo töö "Tugitool". 16 ill
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International Nuclear Information System (INIS)
Simoes Filho, Fernando Lamego; Lapa, Celso Marcelo Franklin; Aguiar, Andre Silva; Soares, Abner Duarte
2011-01-01
This study has the aim to assess the impact of accidental release of radionuclides postulate from a nuclear power reactor through environmental modeling of aquatic resources. In order to do that it was used computational models of hydrodynamic circulation and transport for the simulation of tritium dispersion caused by an accidental release in Ilha Grande Bay from the site of the future third plant in two circulation scenarios. The main difference between the scenarios is based on the enhancement of dilution of the highest concentrations in the last one. This dilution enhancement resulting in decreasing concentrations was observed only during the first two weeks, when they ranged from 1 x 10 9 to 5 x 10 5 Bq/m³ close to the Itaorna beach spreading just to Sandri Island. After 180 days, the plume could not be detected anymore in the bay, because their activities would be lower than the minimum detectable value (< 11 kBq/m³). (author)
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Vacuum vessels for the LHC magnets arrive at CERN
2001-01-01
The first batch of pre-series vacuum vessels for the LHC dipole magnets has just been delivered to CERN. The vessels are components of the cryostats and will provide the thermal insulation for the superconducting magnets. The first batch of vacuum vessels for the LHC dipole magnets with the team taking part at CERN in ordering and installing them. Left to right : Claude Hauviller, Monique Dupont, Lloyd Williams, Franck Gavin, Alain Jacob, Christophe Vuitton, Davide Bozzini, Laure Sandri, Mikael Sjoholm and André de Saever. In 2006 all that will be seen of the LHC superconducting dipoles in the LHC tunnel will be a line of over 1230 blue cylindrical vacuum vessels. Ten vessels, each weighing 4 tonnes, are already at CERN. On 6 July the first batch of pre-series vessels reached the Lab-oratory from the firm SIMIC Spa whose works are near Savona in north-western Italy. Despite appearances, these 15-metre long, 1-metre diameter blue tubes are much more sophisticated than sections of a run-of-the-mill...
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Modeling of the dispersion of tritium from postulated accidental releases from nuclear power plants
International Nuclear Information System (INIS)
Aguiar, Andre Silva de; Simoes Filho, Francisco Fernando Lamego; Lapa, Celso Marcelo Franklin; Alvim, Antonio Carlos Marques; Soares, Abner Duarte
2013-01-01
This study has the aim to assess the impact of accidental release of tritium postulate from a nuclear power reactor through environmental modeling of aquatic resources. In order to do that it was used computational models of hydrodynamics and transport for the simulation of tritium dispersion caused by an accident in a CANDU reactor located in the ongoing Angra 3 site. It was postulated, then, the LOCA - Loss of Coolant Accident -, accident in the emergency cooling system of the nucleus ( without fusion), where was lost 66m 3 of soda almost instantaneously. This inventory contained 35 PBq and was released a load of 9.7 TBq/s in liquid form near the Itaorna beach, Angra dos Reis - RJ. The models mentioned above were applied in two scenarios ( plant stopped or operating) and showed a tritium plume with specific activities larger than the reference level for seawater (1.1MBq/m 3 ), during the first 14 days after the accident. The main difference between the scenario without and with seawater recirculation (pumping and discharge) is based on the enhancement of dilution of the highest concentrations in the last one. This dilution enhancement resulting in decreasing concentrations was observed only during the first two weeks, when they ranged from 1x10 9 to 5x10 5 Bq/m 3 close to the Itaorna beach spreading just to Sandri Island. After 180 days, the plume could not be detected anymore in the bay, because their activities would be lower than the minimum detectable value ( 3 ). (author)
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Selva, Jacopo; Costa, Antonio; Sandri, Laura; Rouwet, Dmtri; Tonini, Roberto; Macedonio, Giovanni; Marzocchi, Warner
2015-04-01
Probabilistic Volcanic Hazard Assessment (PVHA) represents the most complete scientific contribution for planning rational strategies aimed at mitigating the risk posed by volcanic activity at different time scales. The definition of the space-time window for PVHA is related to the kind of risk mitigation actions that are under consideration. Short temporal intervals (days to weeks) are important for short-term risk mitigation actions like the evacuation of a volcanic area. During volcanic unrest episodes or eruptions, it is of primary importance to produce short-term tephra fallout forecast, and frequently update it to account for the rapidly evolving situation. This information is obviously crucial for crisis management, since tephra may heavily affect building stability, public health, transportations and evacuation routes (airports, trains, road traffic) and lifelines (electric power supply). In this study, we propose a methodology named BET_VHst (Selva et al. 2014) for short-term PVHA of volcanic tephra dispersal based on automatic interpretation of measures from the monitoring system and physical models of tephra dispersal from all possible vent positions and eruptive sizes based on frequently updated meteorological forecasts. The large uncertainty at all the steps required for the analysis, both aleatory and epistemic, is treated by means of Bayesian inference and statistical mixing of long- and short-term analyses. The BET_VHst model is here presented through its implementation during two exercises organized for volcanoes in the Neapolitan area: MESIMEX for Mt. Vesuvius, and VUELCO for Campi Flegrei. References Selva J., Costa A., Sandri L., Macedonio G., Marzocchi W. (2014) Probabilistic short-term volcanic hazard in phases of unrest: a case study for tephra fallout, J. Geophys. Res., 119, doi: 10.1002/2014JB011252
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Quantifying probabilities of eruptions at Mount Etna (Sicily, Italy).
Brancato, Alfonso
2010-05-01
based on seismological and volcanological data, integrated with strain, geochemical, gravimetric and magnetic parameters. In the code, is necessary to fix an appropriate forecasting time window. On open-conduit volcanoes as Mt. Etna, a forecast time window of a month (as fixed in other applications worldwide) seems unduly long, because variations of the state of the volcano (significant variation of a specific monitoring parameter could occur in time scale shorter than the forecasting time window) are expected with shorter time scale (hour, day or week). This leads to set a week as forecasting time window, coherently with the number of weeks in which an unrest has been experienced. The short-term vent opening hazard assessment will be estimated during an unrest phase; the testing case (2001 July eruption) will include all the monitoring parameters collected at Mt. Etna during the six months preceding the eruption. The monitoring role has been assessed eliciting more than 50 parameters, including seismic activity, ground deformation, geochemistry, gravity, magnetism, and distributed inside the first three nodes of the procedure. Parameter values describe the Mt. Etna volcano activity, being more detailed through the code, particularly in time units. The methodology allows all assumptions and thresholds to be clearly identified and provides a rational means for their revision if new data or information are incoming. References Newhall C.G. and Hoblitt R.P.; 2002: Constructing event trees for volcanic crises, Bull. Volcanol., 64, 3-20, doi: 10.1007/s0044500100173. Marzocchi W., Sandri L., Gasparini P., Newhall C. and Boschi E.; 2004: Quantifying probabilities of volcanic events: The example of volcanic hazard at Mount Vesuvius, J. Geophys. Res., 109, B11201, doi:10.1029/2004JB00315U. Marzocchi W., Sandri, L. and Selva, J.; 2008: BET_EF: a probabilistic tool for long- and short-term eruption forecasting, Bull. Volcanol., 70, 623 - 632, doi: 10.1007/s00445-007-0157-y.
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Directory of Open Access Journals (Sweden)
Morphet J
2014-06-01
Full Text Available Julia Morphet,1 Kerry Hood,2 Robyn Cant,2 Julie Baulch,3 Alana Gilbee,3 Kate Sandry4 1School of Nursing and Midwifery, Monash University, Frankston, Victoria, Australia; 2School of Nursing and Midwifery, Monash University, Clayton, Victoria, Australia; 3Southern Clinical School, Monash University, Monash Health, Clayton, Victoria, Australia; 4Dandenong Emergency Department, Monash Health, David St, Dandenong, Victoria, Australia Abstract: The establishment of interprofessional teamwork training in the preprofessional health care curriculum is a major challenge for teaching faculties. Interprofessional clinical placements offer an opportunity for teamwork education, as students in various professions can work and learn together. In this sequential, mixed-method study, focus group and survey techniques were used to evaluate students' educational experiences after 2-week ward-based interprofessional clinical placements. Forty-five senior nursing, medicine, and other health care students cared for patients in hospital wards under professional supervision, with nursing-medicine student "teams" leading care. Thirty-six students attended nine exit focus groups. Five central themes that emerged about training were student autonomy and workload, understanding of other professional roles, communication and shared knowledge, interprofessional teamwork/collaboration, and the "inner circle", or being part of the unit team. The learning environment was described as positive. In a postplacement satisfaction survey (n=38, students likewise rated the educational experience highly. In practicing teamwork and collaboration, students were able to rehearse their future professional role. We suggest that interprofessional clinical placements be regarded as an essential learning experience for senior preprofessional students. More work is needed to fully understand the effect of this interactive program on students' clinical learning and preparation for practice
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Modelling of tritium dispersion from postulated accidental release of nuclear power plants
International Nuclear Information System (INIS)
Soares, Abner Duarte
2010-01-01
This study has the aim to assess the impact of accidental release of tritium postulate from a nuclear power reactor through environmental modeling of aquatic resources. In order to do that it was used computational models of hydrodynamics and transport for the simulation of tritium dispersion caused by an accident in a CANDU reactor located in the ongoing Angra 3 site. This exercise was accomplished with the aid of a code system (SisBAHIA) developed in the Rio de Janeiro Federal University (COPPE/UFRJ). The CANDU reactor is one that uses heavy water (D 2 O) as moderator and coolant of the core. It was postulated, then, the LOCA (Loss of Coolant Accident) accident in the emergency cooling system of the nucleus (without fusion), where was lost 66 m 3 of soda almost instantaneously. This inventory contained 35 PBq and was released a load of 9.7 TBq/s in liquid form near the Itaorna beach, Angra dos Reis - RJ. The models mentioned above were applied in two scenarios (plant stopped and operating) and showed a tritium plume with specific activities larger than the reference level for seawater (1.1 MBq/m 3 ) during the first 14 days after the accident. The main difference between the scenario without and with seawater recirculation (pumping and discharge) is based on the enhancement of dilution of the highest concentrations in the last one. This dilution enhancement resulting in decreasing concentrations was observed only during the first two weeks, when they ranged from 1x10 9 to 5x10 5 Bq/m 3 close to the Itaorna beach spreading just to Sandri Island. After 180 days, the plume could not be detected anymore in the bay, because their activities would be lower than the minimum detectable value ( 3 ). (author)
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Energy Technology Data Exchange (ETDEWEB)
Soares, Abner Duarte
2010-07-01
This study has the aim to assess the impact of accidental release of tritium postulate from a nuclear power reactor through environmental modeling of aquatic resources. In order to do that it was used computational models of hydrodynamics and transport for the simulation of tritium dispersion caused by an accident in a CANDU reactor located in the ongoing Angra 3 site. This exercise was accomplished with the aid of a code system (SisBAHIA) developed in the Rio de Janeiro Federal University (COPPE/UFRJ). The CANDU reactor is one that uses heavy water (D{sub 2}O) as moderator and coolant of the core. It was postulated, then, the LOCA (Loss of Coolant Accident) accident in the emergency cooling system of the nucleus (without fusion), where was lost 66 m{sup 3} of soda almost instantaneously. This inventory contained 35 PBq and was released a load of 9.7 TBq/s in liquid form near the Itaorna beach, Angra dos Reis - RJ. The models mentioned above were applied in two scenarios (plant stopped and operating) and showed a tritium plume with specific activities larger than the reference level for seawater (1.1 MBq/m{sup 3} ) during the first 14 days after the accident. The main difference between the scenario without and with seawater recirculation (pumping and discharge) is based on the enhancement of dilution of the highest concentrations in the last one. This dilution enhancement resulting in decreasing concentrations was observed only during the first two weeks, when they ranged from 1x10{sup 9} to 5x10{sup 5} Bq/m{sup 3} close to the Itaorna beach spreading just to Sandri Island. After 180 days, the plume could not be detected anymore in the bay, because their activities would be lower than the minimum detectable value (< 11 kBq/m{sup 3}). (author)
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Maximilien Brice
2004-01-01
CMS: Aerospace goes underground : gleaming aluminium on the outside and carbon black on the inside, as long as a sedan and taller than a man, a strange hollow cylinder arrived at CERN by truck August 26.
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The medical treatment of Parkinson disease from James Parkinson to George Cotzias.
Fahn, Stanley
2015-01-01
It took exactly 150 years since James Parkinson's description in 1817 of the illness bearing his name until the development of effective therapy for this disorder, namely, the introduction of high-dosage levodopa by George Cotzias in 1967. During the first 50 years, no effective therapy was available, but neurologists reported using different agents, including metals. Then, around 1867, Charcot found solanaceous alkaloids to be somewhat helpful, and these became the accepted and popular therapy for the next 75 years. When basic scientists discovered that these alkaloids had central antimuscarinic activity, pharmaceutical chemists developed synthetic chemical agents that were equally effective, with possibly less adverse effects, and around 1950 these synthetic drugs became the standard medical therapy for Parkinson's disease (PD). The link between dopamine and PD did not take place until 1957, 140 years after Parkinson's Essay. The clue came from research on reserpine, a drug derived from the Rauwolfia plant that caused a sedative effect, now recognized as a drug-induced parkinsonian state. Initial investigations revealed that reserpine caused the release and depletion of serotonin stores in the brain. With that knowledge, Arvid Carlsson, a young pharmacologist in Sweden, decided to explore the possibility that reserpine might also affect brain catecholamines. In his now famous, elegant, and simple experiment, he showed that injecting l-dopa, the precursor of catecholamines, alleviated the reserpine-induced parkinsonian state in animals, whereas the precursor of serotonin failed to do so. Carlsson then developed a highly sensitive assay to measure dopamine, and his lab found that dopamine is selectively present in high concentrations in the striatum and that administered l-dopa could restore the dopamine depleted by reserpine. Carlsson postulated that all these findings implicate dopamine in motor disorders. Oleh Hornykiewicz, a young pharmacologist in Vienna, on
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EDITORIAL: A support for prospective nanomaterials A support for prospective nanomaterials
Demming, Anna
2011-01-01
, often touted as a pioneer of a 'bottom-up' approach to nanotechnology, once said 'I was born not knowing and have had only a little time to change that here and there'. In a similar sense, what we do not yet know and understand about the ability to create and manipulate nanosystems is apparently infinite, but as can also be acceded in the case of Richard Feynman, the 'little' we have had time learn so far holds more than a little promise. References [1] Glass R, Möller M and Spatz J P 2003 Nanotechnology 14 314 [2] Kuzyk A, Laitinen K T and Törmä P 2009 Nanotechnology 20 235305 [3] Williams S M, Rodriguez K R, Teeters-Kennedy S, Shah S, Rogers T M, Stafford A D and Coe J V 2004 Nanotechnology 15 S495 [4] Bini T B, Gao S, Tan T C, Wang S, Lim, A, Hai L B and Ramakrishna S 2004 Nanotechnology 15 1459 [5] Yang F, Murugan R, Wang S and Ramakrishna S 2005 Biomaterials 26 2603-10 [6] Tampieri A, Landi E, Valentini F, Sandri M, D'Alessandro T, Dediu V and Marcacci M 2011 Nanotechnology 22 015104 [7] Gross A F, Ahn C C, Van Atta S L, Liu P and Vajo J J 2009 Nanotechnology 20 204005 [8] Zhang S, Gross A F, Van Atta S L, Lopez M, Liu P, Ahn C C, Vajo J J and Jensen C M 2009 Nanotechnology 20 204027
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Editorial Seminar.net Issue 3 Vol. 6
Directory of Open Access Journals (Sweden)
Yngve Nordkvelle
2010-11-01
reflected in the questions of each test they have developed and suggest functionalities for a future test tool to support an improved design process.Hugo Nordseth, Sonja Ekker and Robin Munkvold of Nord-Trøndelag University College present their joint article: “Tools for peer assessment in an e-learning environment”. They explore the functionalities of tools for peer assessment within the LMS used for two different topics taught at their college, in combination with a set of rubrics and a tool called “Six Thinking Hats”. They report that using these in combination stimulate students to write better assignments and provide a deeper understanding of the subjects taught.Arvid Staupe of The Norwegian University of Science and Technology, argues in his article “Experiences from Blended Learning, Net-based Learning and Mind Tools” that in spite of a strong increase in the number of students attending classes, it is possible to improve the quality of the course when blended teaching approaches are employed, using net-based learning material and mind tools, and founded firmly on an educational philosophy.The last article, by Ana Laws, of the University of Bergen, is about “Digital Storytelling as an emerging documentary form”. She claims that digital storytelling can be fruitfully studied using concepts and perspectives from documentary theory. She offers two definitions of digital storytelling and compares to how documentary filmmaking has been characterized. She further argues that contemporary discussions in the field of documentary theory are applicable to the ongoing theorising of “Digital storytelling” and therefore might benefit from the reflections on authorial responsibility and claims of realism and truthfulness in this area.[1] http://www.insidehighered.com/news/focus/technology/recent/pearson (accessed Nov.16.2010