143 research outputs found
De maiori personarum illustrium aetate
No full textQuam ... Praeside ... Joanne Michaele Dahm ... Publicae Eruditorum Censurae Exponit Author Et Respondens Anselmus Franciscus Lieb, Mogonus in Audit. Acad. Moguntiae Die [ ] an. MDCCLVII.Vorlageform des Erscheinungsvermerks: Moguntiae, ex Typogr. Elector. Aulic. Acad. apud Haer. Haeffner, Per Joann. Benjam. WaylandtDatum fehlt im DruckMainz, Jur. Diss., 28. Juli 175
Autonomic Subgrid-Scale Closure for Large Eddy Simulations
No full textMotivated by advances in constrained optimization methods, a fundamentally new autonomic closure for LES is presented that invokes a self-optimization method for the subgrid-scale stresses instead of a predefined turbulence model. This autonomic closure uses the most general dimensionally-consistent expression for the local subgrid-scale stresses in terms of all resolved-scale variables and their products at all spatial locations and times, thereby also incorporating all possible gradients of all resolved variables and products. In so doing, the approach addresses all possible nonlinear, nonlocal, and nonequilibrium turbulence effects without requiring any direct specification of a subgrid-scale model. Instead it uses an optimization procedure with a test filter to find the best local relation between subgrid stresses and resolved-scale variables at every point and time. We describe this autonomic closure approach, discuss truncation, regularization, and sampling in the optimization procedure, and present results from a priori tests using DNS data for homogeneous isotropic and sheared turbulence. Even for the simplest 2nd-order truncation of the general formulation, substantial improvements over the dynamic Smagorinsky model are obtained with this new autonomic approach to turbulence closure
Restatement (Second) of Torts Section 324A: An Innovative Theory of Recovery for Patients Injured Through Use or Misuse of Health Care Information Services, 14 J. Marshall J. Computer & Info. L. 73 (1995)
No full textThe author in this comment discusses how developments in information technology and widespread utilization of technology and software in the patient care context raise the issue of clinical liability for health care information systems vendors. The comment discusses a theory of recovery of tort damages for the negligence of health care information systems vendors under section 324A of the Restatement (Second) of Torts. Section 324A provides in essence that one who undertakes ... for consideration, to render services to another which he should recognize as necessary for the protection of a third person ... is subject to liability to the third person for physical harm. The comment discusses the terminology specific to the computer industry and the types of disclaimers health care information systems vendors use in their contracts. The comment also analyzes the public policies for and against the use of section 324A as a theory of recovery for damages as a result of negligence by a health care information system vendors. The author opposes establishing any bright-line rule defining when a patient can obtain tort damages against a health information systems vendor. The author argues that the use strict liability against health information systems vendor for negligent acts could cause a chilling effect in advances in information technology. However, the author proposes that a patient should only recover damages against a health information systems vendor where the vendor purposely disregards the general health and well-being of the public
Proposed ripplon induced weak localization of electrons over liquid helium
No full textRipplon-induced weak localization is proposed for electrons on a liquid-helium surface. Ripplon scattering is quasi-elastic, the ripplons are quasi-static relative to the electron velocity, and the relative change in occupation number of the ripplon state in a scattering event is small. Conditions for the observation of ripplon-induced weak localization are calculated.The author wishes to thank H.W. Jiang for talkng the data shown in Fig. 2. This woгk was supported in part bу NSF grant #DMR 94-02647
Proposed ripplon induced weak localization of electrons over liquid helium
No full textRipplon-induced weak localization is proposed for electrons on a liquid-helium surface. Ripplon scattering is quasi-elastic, the ripplons are quasi-static relative to the electron velocity, and the relative change in occupation number of the ripplon state in a scattering event is small. Conditions for the observation of ripplon-induced weak localization are calculated.The author wishes to thank H.W. Jiang for talkng the data shown in Fig. 2. This woгk was supported in part bу NSF grant #DMR 94-02647
Panning for salt in Benin and Brittany
No full textThe author describes the work of PIRATTES, a project jointly directed by the Co-operative of Salt Producers in Guande (France), the Scientific And Technological Centre (Benin), and the French Volunteer Association (AFVP). The project, linking communities involved in salt-production in the North and the South, introduced new processes to Benin to avoid the major ecological and workers' health problems caused by traditional processes. Two years into the project, and it has expanded. The results obtained are encouraging, though marred slightly by the continued use of artificial materials.This article is hosted by our co-publisher Taylor & Francis.</p
On the seismicity recorded in the geothermal area of Mt. Amiata. (Oral Presentation - ESC2016-461)
No full textMt. Amiata in Tuscany (Italy) is an extinct volcano whose last eruptive activity was dated about 200 ky ago. Being still characterized by a high geothermal gradient the area lends itself for geothermal exploitation. Beneath the
Tuscan Geothermal Areas seismicity is exclusively observed in the upper crust and is confined in depth by the so called K-horizon (400°C isotherme). The structure above contains permeable layers of highly fractured, volcanic
rocks saturated with hot water and steam. Geothermal exploitation from these layers started in the 1960’s. Shallow earthquakes have occurred close to the geothermal wells, and the question is raised whether these event are of
natural origin or related to the exploitation of heat.
To monitor the seismic activity inside the geothermal field, an 8 station seismic network and a 7 element small aperture seismic array were installed in 2015 in the vicinity of the geothermal power plants during a joint field
experiment by the Istituto Nazionale di Geofisica e Vulcanologia, the University of Potsdam and the GFZ-German Research Center of Geoscience. Already during the first 24 hours of seismic recording the array and the neighboring network stations recorded a M0.5 seismic event in the vicinity of the geothermal field of Bagnore. Since then micro-earthquake activity was recorded regularly.
One of the main challenges of the seismic array/network installation, deployed in direct proximity to the geothermal energy production, is to identify seismic events caused by human operations. As hypocenters are located close to the geothermal power plants, at a similar depth as the production level, it is very difficult - if not impossible - to discriminate between natural earthquakes and anthropogenic events. The main goal of the seismic array/network deployed in the framework of our project is to shed some additional light on this question.
The monitoring capabilities of the recording system permit a lowering of the detection threshold for local seismic events, performing high-resolution hypocentral determination, especially in the vicinity of the industrial operations, and calculating focal mechanisms. Array techniques and relative location methods will be used for a precise hypocentral determination. Polarization and spectral analysis, will be applied to discriminate seismic recordings from Mt. Amiata that sometimes resemble rather volcano-seismic waveforms with long-period characteristics, than typical tectonic events.European Seismological CommissionUnpublishedTrieste, Italy6T. Sismicità indotta e caratterizzazione sismica dei sistemi naturaliope
Can pluralistic approaches based upon unknown languages enhance learner engagement and lead to active social inclusion?
No full textInternational audienceMigrants et langue d'instruction : la déficience des politiques européennes stimule-t-elle l'innovation dans l'inclusion sociale ? L'apprentissage linguistique est depuis longtemps considéré comme un outil décisif pour atteindre les cibles de l'Union européenne (UE) en termes d'inclusion sociale. Cependant, les instruments stratégiques classiques tels que le plan d'action sur l'apprentissage des langues et la diversité linguistique ou la Charte européenne des langues régionales ou minoritaires ont été minés ces dernières années par les répercussions de la crise financière mondiale. Celle-ci a contribué à la décimation généralisée des budgets sociaux dans un grand nombre d'États membres de l'UE. Ce phénomène s'est accompagné d'une influence croissante du discours « néolibéral » dans les politiques et pratiques des services sociaux et d'assistance. En conséquence, les gouvernements centraux, régionaux et locaux ont délégué la responsabilité de la prestation des services à des entreprises commerciales, à la société civile et finalement aux citoyens. Parallèlement, les lacunes dans les prestations de service résultant de cette « crise financière » ont ouvert de nouvelles opportunités aux innovateurs sociaux. De nouvelles formes d'organisations se développent aujourd'hui et appliquent de nouvelles approches qui exploitent l'apprentissage des langues pour dispenser des services innovants. Ceux-ci visent entre autres à favoriser 2 l'intégration des immigrants dans la société. À partir de l'analyse d'études de cas, l'auteur de l'article explore l'apparition de ces nouvelles approches, les types d'innovation actuellement concrétisés et la contribution de ces innovations sociales aux objectifs plus larges de l'UE relatifs à l'inclusion sociale.One way to foster active social inclusion is to enable students to develop a positive attitude to " foreignness ". Creating a situation where mainstream students are less wary of foreign languages and cultures, and where newcomers feel their linguistic background is being valued, provides favourable conditions for the inclusion of these newcomers in the classroom and in society. However, language classrooms in French schools rarely take any previously acquired linguistic knowledge into account, thus unconsciously contributing to the rift between multilingual learners (e.g. 1st-and 2nd-generation immigrant children, refugees, children of parents with different mother tongues) and French learners. Native French learners' first experience of learning another language is usually when English is added as a subject to their curriculum in primary school. In some schools in France, English lessons now include the simulation of multilingual situations, designed in particular for the French " quasi monolingual " students to lose their fear of unknown languages and " foreignness " in general. But the overall aim is to help both groups of learners become aware of the positive impact of multilingualism on cognitive abilities. However, to achieve long-term effects, this awareness-raising needs to be accompanied by maximum engagement on the part of the students. This article explores an instructional strategy termed Pluralistic Approaches based upon Unknown Languages (PAUL), which was designed to develop learning strategies of quasi monolingual students in particular and to increase learner engagement more generally. The results of a small-scale PAUL study discussed by the author seem to confirm an increase in learner engagement leading to an enhancement of learning outcomes. Moreover, PAUL seems indeed suitable for helping to prepare the ground for social inclusion
Nutrient dynamics in a headwater stream : use of continuous water quality sensors to examine seasonal, event, and diurnal processes in the East Fork Jemez River, NM
No full textStream water quality can change substantively over seasonal, event, and diurnal scales. Multiple biogeochemical processes operate on a 24-hour timescale, and also may be influenced by local weather and precipitation events. Increased sampling frequency, made possible by recent developments in continuous water quality monitors, allows us to better understand biogeochemical responses to these events. Continuous water quality sensors were deployed in the East Fork Jemez River (located in northern New Mexico) from 2010 – 2011 to investigate the temporal variability of nutrient concentrations and biogeochemical parameters and the controls on this variation. This thesis is split into two chapters representing two separate manuscripts intended for publication with L. Sherson as the first author. Chapter 1 reports on seasonal and diurnal variation observed in nutrient concentrations and biogeochemical parameters, and the biological and hydrological controls on these processes. Additional co-authors will be Van Horn, D.J., Gomez, J.D., Shafer, B.M., Bixby, R.J., Crossey, L.J., and Dahm, C.N. Chapter 2 summarizes nutrient and biogeochemical responses observed during event periods in the East Fork Jemez watershed. These events include spring snowmelt and precipitation, fall precipitation, and summer monsoons occurring after wildfire. Additional co-authors will be Van Horn, D.J., Gomez, J.D., Crossey, L.J., and Dahm, C.N
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