Academic literature on the topic 'Tracce passive'
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Journal articles on the topic "Tracce passive"
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Krishnamurti, T. N., M. C. Sinha, M. Kanamitsu, D. Oosterhof, H. Fuelberg, R. Chatfield, D. J. Jacob, and J. Logan. "Passive tracer transport relevant to the TRACE A experiment." Journal of Geophysical Research: Atmospheres 101, no. D19 (October 1, 1996): 23889–907. http://dx.doi.org/10.1029/95jd02419.
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Majeed Hadi, Afrah. "The passive of verbs constructed with prepositions (Das Passiv der mit Präpositionen konstruierten Verben )." Journal of the College of languages, no. 44 (June 1, 2021): 317–36. http://dx.doi.org/10.36586/jcl.2.2021.0.44.0317.
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Verbs in German and Arabic are of two types: active and passive. Passive voice is a grammatical voice construction that is found in many languages. Out of grammatical perspective, each main verb has a form in the active and one in the passive known as a "genus verbi" (type of verb). In passive voice, both in German and in Arabic, the focus is on the action itself or on the result of the action; often the perpetrator is not mentioned. In German, to conjugate verbs in the passive voice, you must know the forms of werden (to become). German uses werden + the past participle and states it at the end of a sentence. In Arabic, the passive is formed by changing the vowels on the verb; the vowel series u-i-a occurs instead of the a-vowels. Transitive prepositional verbs originally are intransitive verb with a preposition added to the action of the sentence. In German, the prepositional group can be combined with the prepositions von or durch, while in Arabic, such a prepositional group occurs only in certain cases. In contrast to Arabic, the passive in German is impossible with reflexive verbs. In some cases, an impersonal passive in German corresponds with a personal passive in Arabic. The present paper discusses some of these verbs traced in a chart that shows the most important results when compared with their Arabic equivalents. In grammatischen Darstellung findet man für jedes Vollverb eine Form im Aktiv und eine im Passiv, es wird von „genus verbi“ (Art des Verbs) gesprochen. Im Passiv steht sowohl im Deutschen als auch im Arabischen das Geschehen selbst oder das Ergebnis der Handlung im Vordergrund; aus der Sicht der betroffenen Person oder Sache; oft wird der Täter nicht gennant. Im Deutschen wird die passivische Verbform mit dem Hilfsverb werden und dem Partizip II gebildet, während die Vokalreihe u-i-a anstelle der a- Vokale im Arabischen eintritt. Die im Aktiv mit Präpositionen verbundenen Verben bilden in beiden Sprachen ein unpersönliches Passiv. Im Deutschen kann die Präpositionalgruppe mit den Präpositionen von oder durch verbunden werden. Im Unterschied dazu tritt solche Präpositionalgruppe im Arabischen nur in bestimmten Fällen mit من قبل auf. Im Unterschied zum Arabischen ist das Passiv im Deutschen bei reflexiv Verben unmöglich. In einigen Fällen entspricht ein unpersönliches Passiv im Deutschen einem persönlichen Passiv im Arabischen.
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Kallulli, Dalina. "unified analysis of passives and anticausatives." ZAS Papers in Linguistics 44, no. 1 (January 1, 2006): 171–82. http://dx.doi.org/10.21248/zaspil.44.2006.308.
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Starting from the basic observation that, across languages, the anticausative variant of an alternating verb systematically involves morphological marking that is shared by passive verbs, the goal of this paper is to provide a uniform and formal account of these arguably two different construction types. The central claim that I put forward is that passives and anticausatives differ only with respect to the event-type features of the verb but both arise through the same operation, namely suppression by special morphology of a feature in v that encodes the ontological event type of the verb. Crucially, I argue for two syntactic primitives, namely act and cause, whereto I trace the passive/anticausative distinction. Passive constructions across languages are made compatible by relegating the differences to simple combinatorial properties of verb and prepositional types and their interactions with other event functors, which are in turn encoded differently morphologically across languages. New arguments are brought forward for a causative analysis of anticausatives. Agentive adverbials are examined, and doubt is cast on the usefulness of by-phrases as a diagnostic for argumenthood.
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Gao, Hongjun, Jinqiao Duan, and Xinchu Fu. "Almost Periodic Passive Tracer Dispersion." Journal of Mathematical Analysis and Applications 247, no. 1 (July 2000): 300–308. http://dx.doi.org/10.1006/jmaa.2000.6801.
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Yuxing Yuan, Yuxing Yuan, Wei Li Wei Li, Jilong Han Jilong Han, Qiguang Feng Qiguang Feng, Haitao Yao Haitao Yao, Qiang Zheng Qiang Zheng, Qianggao Hu Qianggao Hu, and and Shaohua Yu and Shaohua Yu. "Fault monitoring in passive optical network using code division multiplex-based dual-OTDR traces comparison." Chinese Optics Letters 15, no. 3 (2017): 031201–31205. http://dx.doi.org/10.3788/col201715.031201.
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Biggs, Alison. "Locating variation in the dative alternation." Linguistic Variation 16, no. 2 (December 31, 2016): 151–82. http://dx.doi.org/10.1075/lv.16.2.01big.
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This paper investigates the structure of the dative alternation in dialects of Northwest British English. This includes theme passivization of apparent Double Object Constructions (It was given her). Detailed investigation shows that different dialects use distinct licensing strategies to derive the Theme passive structure. The main variety discussed is Liverpool English, where Theme passivisation is shown to derive from a prepositional dative with a null preposition. In contrast, Manchester English, a neighbouring variety, derives Theme passives of the Double Object Construction, via an Applicative configuration (Haddican 2010, Haddican and Holmberg 2012). The study shows that a range of syntactic properties and restrictions on a structure can be traced back to variation in the functional lexicon.
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McKeown, Denis, Tom Mercer, Kinga Bugajska, Paul Duffy, and Emma Barker. "The visual nonverbal memory trace is fragile when actively maintained, but endures passively for tens of seconds." Memory & Cognition 48, no. 2 (December 23, 2019): 212–25. http://dx.doi.org/10.3758/s13421-019-01003-6.
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AbstractDespite attempts at active maintenance in the focus of attention, the fragile nature of the visual nonverbal memory trace may be revealed when the retention interval between target memoranda and probed recall on a trial is extended. In contrast, a passively maintained or unattended visual memory trace may be revealed as persisting proactive interference extending across quite extended intervals between trials in a recent probes task. The present study, comprising five experiments, used this task to explore the persistence of such a passive visual memory trace over time. Participants viewed some target visual items (for example, abstract colored patterns) followed by a variable retention interval and a probe item. The task was to report whether the probe matched one of the targets or not. A decaying active memory trace was indicated by poorer performance as the memory retention interval was extended on a trial. However, when the probe was a member of the target set from the preceding trial, task performance was poorer than a comparison novel probe, demonstrating proactive interference. Manipulations of the intertrial interval revealed that the temporal persistence of the passive memory trace of an old target was impressive, and proactive interference was largely resilient to a simple ‘cued forgetting’ manipulation. These data support the proposed two-process memory conception (active–passive memory) contrasting fragile active memory traces decaying over a few seconds with robust passive traces extending to tens of seconds.
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Wania, Frank, and Chubashini Shunthirasingham. "Passive air sampling for semi-volatile organic chemicals." Environmental Science: Processes & Impacts 22, no. 10 (2020): 1925–2002. http://dx.doi.org/10.1039/d0em00194e.
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Soh, Hyungjoon, and Meesoon Ha. "Passive tracer dynamics in slow-bond problem." Journal of Statistical Mechanics: Theory and Experiment 2019, no. 9 (September 3, 2019): 094009. http://dx.doi.org/10.1088/1742-5468/ab3429.
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GOLDRING, R., J. E. POLLARD, and A. M. TAYLOR. "Naming trace fossils." Geological Magazine 134, no. 2 (March 1997): 265–68. http://dx.doi.org/10.1017/s0016756897006717.
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A different approach to the naming of trace fossils is advocated. The primary ichnotaxobase should be the form of the burrow actually occupied, and the secondary ichnotaxobase should be the morphology of the structure that reflects the manner in which this burrow has been displaced and/or extended. Only by attempting to name trace fossils in this way will it be possible to eliminate features due to sedimentological factors that took place on termination of the animal’s activities, including passive infill and diagenesis. To discriminate between different preservational states the citation should include both the taxonomic and preservational aspects.
Dissertations / Theses on the topic "Tracce passive"
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Vystavna, Yuliya. "Environmental and socio-economic determinants, their impacts on trace metals and pharmaceuticals in watercourses : a comparison on two watersheds of France and Ukraine." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14486/document.
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Les objectifs de cette étude comparative de deux bassins versants en France et en Ukraine» sont de trois ordres : i) déterminer l’occurrence des micropolluants émergents (métaux traces et molécules pharmaceutiques) dans les eaux de surface, ii) permettre leur évaluation qualitative et quantitative et enfin iii) estimer leur distribution en fonction du contexte socio-économique. Cette recherche porte sur l'analyse de l'origine, sur les propriétés physico-chimiques et sur le comportement des micropolluants (métaux traces et molécules pharmaceutiques) dans les eaux de surface des rivières Jalle (Bordeaux, France) et Udy & Lopan (Kharkiv, Ukraine). Un suivi des métaux traces et des produits pharmaceutiques dans les eaux naturelles de surface dans différents contextes et conditions climatiques a été réalisé. La description et l'analyse des facteurs environnementaux et socio-économiques influençant l’hydrochimie locale en vue de conclure sur l’opportunité et l'intérêt des micropolluants émergents comme indicateurs anthropiques du contexte socio-économique et environnemental d‘un bassin versant ont été mis en œuvre. L’étude a combiné des techniques de prélèvements d’échantillons d’eau classiques et par capteurs passifs in situ. L’analyse semi quantitative des micropolluants émergents a porté sur les métaux traces (sonde DGT) et les produits pharmaceutiques (POCIS). L’usage de ces capteurs a permis d’évaluer les différentes formes d'éléments, les sources, les variations saisonnières et spatiales, l'accumulation et les risques environnementaux. A partir des données environnementales collectées, acquises, actualisées et validées il a été possible de modéliser la consommation régionale de médicaments dans le cas de (1) la région de Kharkiv, en Ukraine, sur les rivières Lopan et Udy du bassin Seversky Donets et (2) la région de Bordeaux, en France, sur la rivière Jalle, du bassin de la Garonne. Les sites ont été sélectionnés pour représenter une diversité tant du point de vue de l'état de pollution des eaux (nature et flux) que de celui du paysage socio-économique (contexte urbain, social et indicateurs économiques). Les résultats majeurs de cette étude sont : (i) méthodologique pour le développement et la validation de protocoles d’échantillonnage classique et passif (intérêt, limites, recommandations), ii) analytique quant à la mesure des éléments traces des eaux de surface naturelles dans des conditions extrêmes, iii) scientifique par l’obtention d’un jeu de données sur l’hydrochimie des éléments traces ( présence, accumulation, origine et variabilité spatiale et temporelle et iv) prospectif quant à l’usage des métaux traces et de produits pharmaceutiques comme traceurs anthropiques de l’état des eaux naturelles de surfaces et reflet du contexte socio-économique. La modélisation socio-économique (statistique) et environnementale (balance de masse) aide à comprendre l’évolution de la qualité des eaux de surface dans leur contexte régional et permet d’identifier certains contaminants comme des indicateurs des activités anthropiques d’un bassin versant et permet de définir une typologie. L’ensemble des résultats de la thèse sont présentés sous la forme d'articles publiés ou soumis dans des revues scientifiques internationalesThe PhD study focuses on the understanding of processes of the impact of environmental and socio-economic determinants on the occurrence, accumulation and distribution of trace metals and pharmaceuticals in urban watercourses. The research has been based on the analysis of the origin; physico-chemical properties and behavior of trace pollutants. The study was performed in two general steps: (i) monitoring of trace metals and pharmaceuticals in natural waters; (ii) description and analysis of environmental and socio-economic determinants that influence the water chemistry and (iii) evaluation of trace pollutants as environmental and socio-economic indicators. The monitoring of trace metals in natural water was proceed using the combination of passive and grab water sampling techniques, in order to evaluate various forms of elements, sources, seasonal and spatial variations, accumulation and environmental risks associated with the presence of contaminants in the study areas. The monitoring of pharmaceuticals was done using passive sensors to determine their capacity to register chemicals variation in time and adequation to use environmental data for the regional medicament consumption modeling. Monitoring data were also investigated in term of potential applications of trace metals and pharmaceuticals as environmental and socio-economic indicators. Two study sites were chosen: (1) the Kharkiv region in Ukraine where research was focused on the Lopan and Udy rivers of the Seversky Donets water basin and (2) the Bordeaux region in France where water monitoring was done in the Jalle River, Garonne water basin. Sites were mainly selected to represent the water pollution status in different socio-economic regions. General PhD results can be described as follows:1. The methodology for pilot and continuous monitoring of trace elements in the water with combination of traditional (grab) and innovative (passive) sampling procedures help to get data on trace elements presence, accumulation and sources, considering time variations.2. The analysis of trace metals and pharmaceuticals in two river basins of France and Ukraine and determination of environmental factors that impact on the occurrence, accumulation and distribution of these chemicals.3. The establishment of links between regional socio-economic issues and water quality data. The socio-economic and environmental modeling helps us to understand the water pollution process in regional context and give the opportunity to propose contaminants as tracers of anthropogenic activities and water quality assessment.Results of the PhD study are presented in the form of published or submitted peer-reviewed articles
Диссертация «Экологические и социально-экономические факторы распространения металлов и фармацевтических веществ в природных водах: на примере рек Харькова, Украина и Бордо, Франция» на соискание степени Доктора Философии (Environmental Science) подготовлена в рамках договора о научном сотрудничестве и совместном руководстве между Университетом Бордо, Франция и Харьковской национальной академией городского хозяйства, Украина.Актуальность работы связана с сушествующими проблемами мониторинга природных вод, недостатком исследований микро-загрязнителей водотоков как во Франции, так и в Украине, существующим экологическим риском, который возникает при поступлении и накоплении металов и фармацевтических веществ в урбанизированных водотоках, а также возможностью использования химических веществ в качестве экологических и социально – экономических индикаторов. Целью диссертационной работы стало усовершенствование методов мониторинга микро-загрязнителей в природных водах и оценка возможности использования отдельных микро-загрязнителей в качестве экологических и социально-экономических показателей. Предметом исследования являются экологические и социально-экономические факторы, влияющие на распространение металлов и фармацевтических веществ в природных водах. Объектом исследования стали реки Уды и Лопань, Харьковская область, Украина и река Жаль, регион Бордо, Франция.Основные задачи: (1) провести мониторинг рек на различные формы металлов и фармацевтические вещества с применением стандартных и инновационных (пассивных) методов отбора проб; (2) опеределить экологические и социально- экономические факторы, которые влияют на распространение микрозагрязнителей в природных водах; (3) изучить возможность использования металлов и фармацевтических веществ в качестве индикаторов антропогенного загрязнения природных вод.В результате проведенных исследований был: Впервые: (а) осуществлен мониторинг лабильных форм металлов в реках бассейна Северского Донца, в результате которого определены концентрации токсичных металлов в водотоках, источники и количество их поступления; (б) проведен мониторинг фармацевтических веществ в природных водах Украины, (в) определены концентрации и основные источники поступления фармацевтических препаратов и удельные показатели потребления различных медикаментов в Харьковском регионе; Усовершенствованы: (а) методика проведения мониторинга воды за счет применения стандартных и инновационных пассивных методов отбора проб воды в контрастных климатических и гидрологических условиях с целью исследования различных форм загрязнителей и их временных вариаций; (б) балансово-статистическая модель, которая позволяет использовать данные мониторинга природных вод для социально-экономической характеристики регионов – водопользователей; Предложены:(а) система определения геохимического фона рек на основании торий – нормализованных концентраций металлов в донных отложениях; (б) метод использование металлов и фармацевтических веществ в качестве индикаторов поступления сточных вод для идентификации несанкционированных сбросов.Основу диссертационного исследования составили натурные данные полевых исследований рек Харькова и Бордо, которые были организованы и проведены с непосредственным участием автора в 2008 – 2011 гг. Большинство лабораторных анализов было лично проведено автором в сертифицированных лабораториях Университета Бордо и Университета Орлеан, Франция.Диссертация имеет теоретическое и практическое значение для дальнейшего развития мониторинга природных вод, а также повышения уровня экологической и социальной безопасности в регионах. По теме опубликовано 4 статьи в международных журналах с высоким ИМПАКТ фактором, а также 5 статей в изданиях, реглиментированных ВАК Украины и России
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Toumi, Khalifa. "A trust framework for multi-organization environments." Phd thesis, Institut National des Télécommunications, 2014. http://tel.archives-ouvertes.fr/tel-00997693.
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The widespread of inexpensive communication technologies, distributed data storage and web services mechanisms currently urge the collaboration among organizations. Partners are participating in this environment motivated by several advantages such as: (1) the ability to use external and professional resources, services and knowledge, (2) the reduction of time-consuming requirements and (3) the benefaction of experts experience. However, this collaboration is not perfect since several problems can arise such as the misuse of resources, disclosure of data or inadequate services. Therefore, security is an important concern of the participants. In particular trust management and access control are one of the major security issues for an organization. This thesis addresses these two areas in particular. It proposes a novel and comprehensive trust framework for Multi-Organization Environments. Our approach is organized in four parts. First, we propose a vector based model approach for defining trust vectors. These vectors evaluate a set of requirements, under conditions, and provide a degree of confidence. In our approach, we consider two different types of vectors. On the one hand, a vector that links a user to an organization and, on the other hand, a vector that links two organizations. We also show how these vectors are evaluated and shared among the different organizations, and how we combine the provided trust information in order to enhance the security. Second, the TRUST-OrBAC model was designed to add the previous trust approach to the ORBAC model. Moreover, this solution was applied with a real collaboration network between companies. Third, we present a trust ontology methodology based on access control concepts. This ontology will be used to share the trust beliefs between participants and to make equivalence between their trust objectives. How to define this trust relationship, how to understand the trust objective of a requester, and how to evaluate the recommendation value is addressed in this thesis. Fourth, we improve our work by designing a passive testing approach in order to evaluate the behavior of a user. This contribution is based on the monitoring tool MMT. Finally the entire architecture of our system is proposed
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Poulier, Gaelle. "Etude de l’échantillonnage intégratif passif pour l’évaluation réglementaire de la qualité des milieux aquatiques : application à la contamination en pesticides et en éléments trace métalliques des bassins versants du Trec et de l’Auvézère." Thesis, Limoges, 2014. http://www.theses.fr/2014LIMO0032/document.
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Parce qu’ils sont peu coûteux, faciles d’utilisation, et surtout très efficaces, les pesticides sont devenus une composante majeure de l’agriculture moderne et se sont imposés dans de nombreuses activités urbaines et domestiques. Ces molécules se retrouvent aujourd’hui dans tous les compartiments de l’environnement notamment dans les milieux aquatiques. Le suivi resserré des substances actives et de leurs résidus, présents dans l’environnement à des concentrations potentiellement dommageables pour les écosystèmes, apparaît aujourd’hui comme une nécessité. L’application de la Directive cadre sur l’eau, l’une des principales réglementations européenne ciblant les eaux, requiert des techniques d’échantillonnage et d’analyse performantes, alliant haute sensibilité, facilité de mise œuvre, coûts abordables, et surtout précision et fiabilité. Actuellement, la méthodologie employée consiste en des prélèvements ponctuels d’eau à pas de temps lâche (une fois par mois en général) suivi de l’analyse en laboratoire. Cette approche souffre d’un manque de représentativité temporelle, couplée à une sensibilité analytique souvent peu satisfaisante. Les techniques d’échantillonnage passif développées au cours des 20 dernières années pourraient être intégrées dans les réseaux de surveillance réglementaires afin de pallier ces manques, mais des questions subsistent encore quant à leur opérationnalité. Ces travaux de thèse visent à développer puis tester les échantillonneurs passifs sur le terrain afin de déterminer leur adéquation avec les exigences de la Directive cadre sur l’Eau, et le cas échéant, mettre en évidence les principaux verrous scientifiques résiduels. L’originalité de ce travail réside dans:- la variété des outils évalués : trois échantillonneurs différents ont été étudiés (Le Polar Organic Chemical Integrative Sampler (POCIS), le Chemcatcher et le Diffusive Gradient in Thin film (DGT). Les méthodes classiques de prélèvement ponctuels ont également été mise en œuvre.- la variété des environnements étudiés : deux bassins versant très différents ont été considérés, l’un présentant une contamination en pesticides forte, l’autre une contamination modérée.- La mise en en œuvre des échantillonneurs passifs dans un réel contexte réglementaire, les cours d’eau choisis faisant l’objet d’un contrôle opérationnel. Les données acquises avec les échantillonneurs passifs ont ainsi pu être comparées avec les suivis de l’Agence de l’EauThe intensive use of pesticides in agriculture and urban activities since the 1950s has led to diffuse contamination of environmental compartments (air, soil, water). The presence of these molecules can lead to toxic effects for biota. The implementation of the Water Framework Directive (WFD) requires the use of an efficient monitoring network, based on reliable sampling and analytical techniques. Nowadays, grab sampling followed by extraction of analytes and chromatographic analysis is the most widespread strategy because of its simplicity of implementation but it also has numerous drawbacks. The crux of the issue lies in the lack of temporal representativeness and the low analytical sensibility. An alternative strategy to overcome some of these problems could be the use of passive samplers. This contribution aims at discuss about the possible application of passive samplers in regulatory monitoring programs. The originality of this work lies in :The variety of tested devices: three different samplers was studied (The Polar Organic Chemical Integrative Sampler (POCIS), the Chemcatcher and the Diffusive Gradient in Thin Film (DGT). Conventional grab sampling strategies were also evaluated.The variety of studied environments: two very different watersheds were selected. The first one presented a high level of contamination; the second had a low contamination in pesticides.The implementation of passive samplers in a real regulatory context, as the selected streams were monitored by the Water Agency for operational control. Data from the Water Agency could therefore be compared with passive sampler data
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Devillers, Delphine. "Fiabilisation de la quantification des éléments traces cationiques et anioniques par la technique d'échantillonnage DGT en milieu aquatique naturel." Thesis, Limoges, 2017. http://www.theses.fr/2017LIMO0058/document.
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La technique d’échantillonnage passif DGT (« Diffusive Gradients in Thin Films ») possède de nombreux avantages (intégration des variations temporelles, abaissement des limites de quantification) qui font d’elle une méthode prometteuse pour une utilisation en réseaux de mesure pour quantifier les éléments traces dans les eaux naturelles. Cependant, il existe encore des zones d’ombre qui constituent des freins à son utilisation dans un contexte réglementaire. Ce travail a donc pour objectif d’identifier des biais potentiels et ainsi contribuer à fiabiliser la méthode. Cette étude montre que l’obtention d’un résultat avec une incertitude minimisée doit passer par la détermination expérimentale des facteurs d’élution ; cependant, l’utilisation d’une valeur standard de 0,8 pour le Cr(III) et de 0,85 pour Al(III), Cd(II), Co(II), Cu(II), Ni(II), Pb(II) et Zn(II) est proposée afin d’alléger les manipulations tout en conservant une incertitude raisonnable (<10%). L’étude de l’influence de l’encrassement des dispositifs DGT a montré que la sorption des cations Cd(II), Cu(II) et Pb(II) sur les filtres encrassés affectent respectivement peu, modérément et fortement leur accumulation dans les échantillonneurs et donc leur quantification. Des durées d’exposition de moins d’une semaine sont alors préconisées pour ces éléments. En revanche, l’encrassement a eu un impact négligeable sur le Ni(II) et sur les oxyanions As(V), Cr(VI), Sb(V) et Se(VI). Enfin, une méthode de quantification simultanée du Cr(III), essentiel à la vie, et du Cr(VI), toxique, a été développée en vue d’améliorer l’évaluation de la toxicité d’une eau. Un unique échantillonneur DGT fixe les deux formes tandis qu’elles sont ensuite sélectivement séparées par une étape d’élution. Cette méthode est robuste sur une large gamme de forces ioniques et de concentrations en sulfate mais sur une gamme de pH plus restreinte ne couvrant pas toutes les eaux naturelles (4 à 6)The passive sampling DGT technique (Diffusive Gradients in Thin Films) has a lot of benefits (time-weighted average concentrations, low limits of quantification) and would therefore be a useful tool for monitoring studies to quantify trace elements in natural water. However, there are still some limitations and grey areas that put the brakes on the development of the method for regulatory applications. The aim of this work is to identify potential biases and contribute to increase the method reliability. This study shows that a minimized uncertainty on results can be obtained only if elution factors are experimentally determined; however, standard values of 0.8 for Cr(III) and 0.85 for Al(III), Cd(II), Co(II), Cu(II), Ni(II), Pb(II) and Zn(II) are suggested to reduce manipulations while keeping reasonable uncertainty (<10%). Studying the influence of fouling developed on DGT devices showed that the sorption of cations Cd(II), Cu(II) and Pb(II) had, respectively, a slight, moderate and strong impact on their accumulation in DGT samplers and therefore on their quantification. Samplers should then be deployed for less than one week. In contrast, fouling had a negligible impact on oxyanions As(V), Cr(VI), Sb(V) and Se(VI). Finally, a method was developed to simultaneously quantify both Cr oxidation states naturally occurring in natural waters, which are Cr(III), essential to life, and Cr(VI), toxic. Both forms are accumulated in a single DGT sampler before being selectively separated during an elution step. This method is robust for wide ranges of ionic strengths and sulfate concentrations but for a narrower range of pH (4 to 6)
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Mouttappa, Pramila. "A symbolic-based passive testing approach to detect vulnerabilities in networking systems." Phd thesis, Institut National des Télécommunications, 2013. http://tel.archives-ouvertes.fr/tel-01017860.
Full textAbstract:
Due to the increasing complexity of reactive systems, testing has become an important part in the process of the development of such systems. Conformance testing with formal methods refers to checking functional correctness, by means of testing, of a black-box system under test with respect to a formal system specification, i.e., a specification given in a language with a formal semantics. In this aspect, passive testing techniques are used when the implementation under test cannot be disturbed or the system interface is not provided. Passive testing techniques are based on the observation and verification of properties on the behavior of a system without interfering with its normal operation, it also helps to observe abnormal behavior in the implementation under test on the basis of observing any deviation from the predefined behavior. The main objective of this thesis is to present a new approach to perform passive testing based on the analysis of the control and data part of the system under test. During the last decades, many theories and tools have been developed to perform conformance testing. However, in these theories, the specifications or properties of reactive systems are often modeled by different variants of Labeled Transition Systems (LTS). However, these methodologies do not explicitly take into account the system's data, since the underlying model of LTS are not able to do that. Hence, it is mandatory to enumerate the values of the data before modeling the system. This often results in the state-space explosion problem. To overcome this limitation, we have studied a model called Input-Output Symbolic Transition Systems (IOSTS) which explicitly includes all the data of a reactive system. Many passive testing techniques consider only the control part of the system and neglect data, or are confronted with an overwhelming amount of data values to process. In our approach, we consider control and data parts by integrating the concepts of symbolic execution and we improve trace analysis by introducing trace slicing techniques. Properties are described using Input Output Symbolic Transition Systems (IOSTSs) and we illustrate in our approach how they can be tested on real execution traces optimizing the trace analysis. These properties can be designed to test the functional conformance of a protocol as well as security properties. In addition to the theoretical approach, we have developed a software tool that implements the algorithms presented in this paper. Finally, as a proof of concept of our approach and tool we have applied the techniques to two real-life case studies: the SIP and Bluetooth protocol
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Veyret, Nathalie. "Traces d'un passage : l'oeuvre de Barbara Pym." Bordeaux 3, 1996. http://www.theses.fr/1996BOR30036.
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Cette etude de l'oeuvre de barbara pym inclut pour la premiere fois en france l'examen des papiers personnels de l'auteur, deposes a la bodleian library, oxford : manuscrits des romans, journal, correspondance, carnets litteraires, textes de conferences. La richesse de ces materiaux permet d'envisager l'etude des romans sous un nouveau jour. L'oeuvre se fait trace du passage de l'auteur dans l'angleterre de l'apres-guerre. Veritable historiographie, elle montre des personnages plutot ternes qui vivent une vie rangee, loin du bruit et de la fureur. Elle pourrait s'articuler sur l'aphorisme de cioran : "rater sa vie, c'est acceder a la poesie". Le monde de pym est le monde de l'insucces, dans lequel les hommes et les femmes se livrent a des jeux de roles sans jamais reussir a communiquer. Les liaisons sont dangereuses, aussi sont-elles evitees. On leur prefere une solitude confortable, agrementee de petits plaisirs egoistes, dont la bonne chere n'est pas des moindres. Le quotidien est detourne et les personnages s'inventent les cles d'une vie marquee au sceau de l'insignifiance. Le texte pymien aussi joue de la banalite pour mieux mettre en lumiere la tragedie de la vie humaine. La tension du recit tient ainsi au poids qui se cache derriere l'insignifiance. Pym reussit a ecrire le livre sur rien appele par flaubertThis study of the works of barbara pym includes for the first time in france the analysis of the author's personal papers deposited at the bodleian library : manuscripts of the novels, her diary, letters, notebooks and conference scripts. The wealth of this material is the starting point for a new study of the novels. The works are the traces of the author's passage in post-var england. Pym's characters are rather dull and lead a quiet unobtrusive life. Pym's world is the world of failure, in which men and women play games but never achieve communication. Love affairs are so dangerous that they are avoided. Solitude sometimes is best company, especially when relieved by the prosaic, mundane pleasures of food for instance. The characters invent a life of their own, in which humdrum tasks play a prominent role. Pym's writing also uses banality to emphasise the tragedy of human life. Simple words bide a profound meaning. Pym achieves this book about nothing flaubert wished for
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Sundermeyer, Miles Aaron. "Mixing in the North Atlantic tracer release experiment : observations and numerical simulations of Lagrangian particles and passive tracer." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/57846.
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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1995.Includes bibliographical references (leaves 89-90).
by Miles Aaron Sundermeyer.
M.S.
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Matheu, Nathalie. "Passage à l’écriture, écriture du passage : sur les traces d’adultes migrants en ateliers d’écriture." Thesis, Montpellier 3, 2018. http://www.theses.fr/2018MON30089.
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Depuis une vingtaine d’années, la didactique de l’écrit enrichit ses réflexions et ses pratiques par les recherches menées notamment en sciences du langage et en génétique textuelle (Fabre, 1990 ; Doquet, 2011 ; Chiss, 2012). Ces travaux, qui envisagent l’écriture dans sa dynamique scripturale, s’interrogent sur la façon dont se construit l’écriture en acte (Fénoglio & Chanquoy, 2007). En effet, après les travaux de J. Derrida (1967) et de J. Goody (1977/1979), qui ont destitué l’hégémonie de la pensée logocentriste, nous ne pouvons plus réduire l’écriture à un code second, comme double représentation de la pensée et du langage qui l’oralise. L’écriture, par ses fonctions spécifiques, tisse des liens étroits avec la mémoire, à la fois par l’activation anamnésique et par l’usage averti des artefacts hypomnésiques (instrument graphique et support). Ce double jeu de la mémoire (anamnèse et hypomnèse), qui répond à celui de l’écriture, permet le passage au scriptural en orchestrant une chaîne qui, de façon symbolique, réunit voix et écriture et ouvre ainsi des espaces d’inscription du sujet écrivant. Cette réflexion épistémologique a nourri l’élaboration de séquences didactiques expérimentales favorisant le passage à l’écriture d’adultes migrants, sous la forme d’ateliers d’écriture, qui s’inscrivent dans l’introduction didactique des Arts du Langage (Meschonnic, 1982 ; Auger & Pierra, 2006 ; Aden, 2008) dans des contextes d’enseignement-apprentissage de français langue seconde (FLS). Ce dispositif a permis de construire un corpus de 74 textes manuscrits, recueillis en observation participante, en contexte associatif. L’analyse qualitative des données, en mobilisant les outils théoriques et méthodologiques de l’analyse du discours et de la génétique textuelle, s’est organisée autour d’une triple mise en perspective des notions de passage et d’écriture. L’examen des traces graphiques permet en effet de mettre au jour (1) les stratégies d’entrée des scripteurs dans l’écriture en FLS, (2) les retours sur le déjà écrit, notamment par le biais des ratures, qui donnent à voir une dialogisation interne (Bres, 1988) inhérente à la mise en écriture et (3) l’émergence des souvenirs reconstruisant le parcours migratoire, créant ainsi une écriture du passageFor the last twenty years, writing pedagogy has been enriched in reflection and practice by research, most notably, from linguistics and genetic criticism (Fabre, 1990; Doquet, 2011; Chiss, 2012). These studies, which consider writing within its scriptural dynamic, have examined the construction of the act of writing (Fénoglio & Chanquoy, 2007). In light of the contributions of J. Derrida (1967) and J. Goody (1977/1979), who dismissed the hegemony of logocentric thought, writing can effectively no longer be reduced to a secondary code, a dual representation of thought and the language that gives voice to it. With its specific functions, writing is intertwined with memory, both through anamnesic activation and the informed use of hypomnesic artifacts (writing instruments and media). The double memory game (anamnesis and hypomnesis), which contributes to the process of writing, enables the transition to the written mode by orchestrating a chain that, in a symbolic way, links voice and writing and thus opens inscriptional spaces for the writing subject. This epistemological refection supported the development of experimental instructional sessions, which took the form of writing workshops, designed to support migrant adults’ transition to writing. The workshops were implemented as part of a broader introduction to the language arts (Meschonnic, 1982; Auger & Pierra, 2006; Aden, 2008) in contexts of teaching and learning French as a second language (FSL). This arrangement allowed for the construction of a corpus of 74 textual manuscripts, collected by means of participant observation in the context of volunteer work. The qualitative analysis of data, examined through the application of theory and methods from discourse analysis and textual genetics, was organized around a three-pronged approach to the notions of transition and writing. The examination of graphic marks makes it possible to uncover (1) the initial strategies of FLS writers, (2) their reconsideration of previously written text, notably by means of deletions, which reveal inner dialogism (Bres, 1988) inherent to the production of writing, and (3) the emergence of memories that reconstruct the migrant experience, and which constitute writing in transition
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Seo, Daniele. "Avaliação dos teores de Br, Cl, K, Mg, Mn e V em mexilhões Perna perna (Linnaeus, 1758: Mollusca, Bivalvia) coletados no litoral do estado de São Paulo, Brasil." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-08032013-161647/.
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O ambiente costeiro tem sido fortemente alterado em função de múltiplos impactos ambientais decorrentes das atividades antrópicas, como por exemplo, o escoamento de esgoto proveniente de áreas urbanas, a liberação de inúmeros produtos químicos das indústrias, a agricultura e o fluxo de embarcações, que podem acarretar vazamentos acidentais de petróleo e derivados, combustíveis e outros produtos transportados por via marítima. Neste contexto, um dos meios para avaliação da contaminação ambiental causada por essas substâncias potencialmente tóxicas em água do mar é a monitoração por meio de diferentes espécies de bivalves, que tem sido utilizada por diversos pesquisadores, do Brasil e do exterior. No que se refere aos moluscos bivalves, particularmente os mexilhões, o seu uso no biomonitoramento da contaminação marinha deve-se principalmente à sua ampla distribuição geográfica, hábito séssil e habilidade de concentrar metais tóxicos em até 102 - 105 vezes em relação às concentrações detectadas na água. No presente trabalho, foi empregado o biomonitoramento passivo com o uso do molusco bivalve Perna perna com relação aos elementos Br, Cl, K, Mg, Mn e V. Foram escolhidos estes elementos uma vez que eles podem ser determinados pelo método de INAA (Análise por Ativação com Nêutrons Instrumental), por meio da irradiação curta o que proporciona análises mais rápidas e também por serem importantes do ponto de vista nutricional ou ambiental. O objetivo do presente trabalho foi avaliar os teores de Br, Cl, K, Mg, Mn e V em amostras de mexilhões Perna perna (Linnaeus, 1758: Mollusca, Bivalvia) coletados em regiões costeiras de São Paulo sujeitas à contaminação antrópica (Ponta de Itaipu e Ilha das Palmas, em Santos), comparando os valores obtidos nos sítios possivelmente impactados com os valores do sítio controle situado na Praia da Cocanha, em Caraguatatuba. Os pontos de coleta no litoral de São Paulo estão localizados nas regiões geográficas 23º 37 S 45º 24 W (Caraguatatuba) e 23º 57\' S - 46º 20\' W (Santos). A coleta dos organismos foi realizada em todas as estações do ano, com início na primavera de 2008 e término no inverno de 2009. As amostras coletadas foram limpas, trituradas, homogeneizadas e secas por meio da liofilização para posterior INAA. O procedimento de INAA consistiu em irradiar alíquotas das amostras obtidas na forma de pó em invólucros de polietileno no reator nuclear IEA R1 do IPEN/CNEN - SP juntamente com padrões sintéticos de elementos. O tempo de irradiação no reator foi de 8 a 10 s e sob o fluxo de nêutrons térmicos de 6,6 x 1012 n cm-2 s-1. As concentrações dos elementos foram calculadas pelo método comparativo. O procedimento de INAA foi validado com relação à exatidão e precisão, por meio das análises dos materiais de referência certificados NIST SRM 1566b Oyster Tissue e NIST SRM 2876 Mussel Tissue. Os resultados destes materiais de referência certificados indicaram uma boa qualidade dos resultados com relação à precisão e exatidão. As faixas das concentrações (em base seca) dos elementos obtidos nos mexilhões coletados em Santos e na Praia da Cocanha para as quatro estações do ano foram de: 173,80 a 358,99 mg kg-1 para Br; 45658 ± 1811 a 109166 ± 824 mg kg-1 para Cl; 7043 ± 856 a 12506 ± 675 mg kg-1 para K; 2774 ± 211 a 5691 ± 717 mg kg-1 para Mg; 7,01 ± 0,30 a 29,74 ± 3,32 mg kg-1 para Mn e 0,77 ± 0,02 a 3,43 ± 0,28 mg kg-1 para V. Foi estudada a variação sazonal e espacial das concentrações desses elementos e também foram comparados esses resultados com valores da literatura. A partir dos resultados obtidos pode - se concluir que os mexilhões da espécie Perna perna, podem ser utilizados como biomonitores da contaminação marinha.The coastal environment has been heavily altered by multiple environmental impacts of human activities, such as disposal of sewage from urban areas, the release of numerous chemical industries, agriculture and the flow of vessels, which can lead to accidental spills of oil and oil products, fuels and other products transported by sea. In this context, a means of determining concentrations of these potentially toxic substances in the sea water is the biomonitoring by means of different types of bivalves, which have been used by various researchers, in Brazil and other countries. With regard to bivalve mollusks, particularly mussels, their use in monitoring the marine contamination is mainly due to their wide geographic distribution, sessile habit and ability to concentrate toxic metals to 102-105 times in relation to the concentrations detected in water. In the present study, we employed the passive biomonitoring using the Perna perna bivalve mollusk with respect to the elements Br, Cl, K, Mg, Mn and V. These elements were chosen since they can be determined by INAA method (Instrumental Neutron Activation Analysis), by means of short irradiation which provides faster analyzes and also due to their importance from the standpoint of environmental or nutritional studies. The aim of this study was to evaluate the content of Br, Cl, K, Mg, Mn and V in samples of Perna perna mussels (Linnaeus, 1758: Mollusca, Bivalvia) collected in coastal regions of São Paulo subject to anthropogenic contamination (Ponta de Itaipu and Palmas Island, in Santos), comparing the values obtained in sites potentially impacted with the values of the control site in Praia da Cocanha, in Caraguatatuba. The collection points located in São Paulo coast are located in the geographical areas 23º 37\'S - 45° 24\' W (Caraguatatuba) and 23º 57\'S - 46º 20\' W (Santos). The collection of organisms was performed in all seasons of the year, beginning in spring 2008 and ending in winter 2009. The samples were cleaned, crushed, homogenized and dried by lyophilization for further analysis by INAA. The INAA procedure consisted of irradiating aliquots of the samples obtained in powder form in polyethylene envelopes in the nuclear research reactor IEA - R1 of IPEN / CNEN - SP together with synthetic standards of elements. The irradiation time in the reactor was 8 to 10 s under the thermal neutron flux of 6.6 x 1012 n cm-2 s-1. The concentrations of the elements were calculated using the comparative method. The INAA procedure was validated with respect to accuracy and precision, through the analysis of certified reference materials NIST SRM 1566b Oyster Tissue and NIST SRM 2876 Mussel Tissue. The results of these certified reference materials indicated good quality of results with respect to precision and accuracy. The ranges of concentrations (dry basis weight) of the elements obtained in mussels collected in Santos and Praia da Cocanha for the four seasons of the year were: 173.80 to 358.99 mg kg-1 for Br; 45658 ± 1811 to 109166 ± 824 mg kg-1 for Cl; 7043 ± 856 to 12506 ± 675 mg kg-1 for K; 2774 ± 211 to 5691 ± 717 mg kg-1 for Mg; 7.01 ± 0.30 to 29.74 ± 3.32 mg kg-1 for Mn and 0.77 ± 0.02 to 3.43 ± 0.28 mg kg-1 for V. The seasonal and spatial variations of the concentrations of these elements were studied and the values compared to the literature. From the results obtained it can be concluded that the species of Perna perna mussels, can be used as biomonitors of marine contamination.
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Bohlin, Pernilla. "Passive sampling of PAHs and some trace organic compounds in occupational and residential air : needs, evaluation and limits /." Göteborg : Institute of Medicine at Sahlgrenska Academy, University of Gothenburg, 2010. http://hdl.handle.net/2077/2.
Full textBooks on the topic "Tracce passive"
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Leutrat, Jean Louis. Des traces qui nous ressemblent. Seyssel, Ain: Editions Comp'Act, 1990.
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Georges Perec, traces of his passage. Birmingham, Ala: Summa Publications, 1988.
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Etienne-Jules Marey: A passion for the trace. New York: Zone Books, 1992.
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Dagognet, François. Etienne-Jules Marey: La passion de la trace. Paris: Hazan, 1987.
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Völker, Stefan. Passive Dienstleistungsfreiheit im Europäischen Gemeinschaftsrecht. Berlin: Duncker & Humblot, 1990.
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Bal, Marcel Bolle de. Les adieux d'un sociologue heureux: Traces d'un passage. Paris: L'Harmattan, 1999.
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Middle passage. New York, N.Y., U.S.A: Plume, 1991.
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Middle passage. New York: Atheneum, 1990.
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Johnson, Charles Richard. Middle passage. Edinburgh: Payback Press, 1999.
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Dauch, Richard E. Passion for manufacturing. Dearborn, Mich: Society of Manufacturing Engineers, 1993.
Find full textBook chapters on the topic "Tracce passive"
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Altan, Hasim, Mona Hajibandeh, Kheira Anissa Tabet Aoul, and Akash Deep. "Passive Design." In Springer Tracts in Civil Engineering, 209–36. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31967-4_8.
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Reder, Jake. "Conductive Tracks and Passive Electronics." In Inkjet Technology for Digital Fabrication, 159–81. Chichester, UK: John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118452943.ch7.
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Chang, Chia-Wei, Alexandre Gerber, Bill Lin, Subhabrata Sen, and Oliver Spatscheck. "Network DVR: A Programmable Framework for Application-Aware Trace Collection." In Passive and Active Measurement, 191–200. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-12334-4_20.
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Meißner, Pascal. "Passive Scene Recognition." In Springer Tracts in Advanced Robotics, 43–124. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31852-9_3.
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Castaldo, Paolo. "Passive Structural Control." In Springer Tracts in Mechanical Engineering, 1–19. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-02615-2_1.
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Zarifis, Kyriakos, Mark Holland, Manish Jain, Ethan Katz-Bassett, and Ramesh Govindan. "Modeling HTTP/2 Speed from HTTP/1 Traces." In Passive and Active Measurement, 233–47. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30505-9_18.
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Woyczyński, W. A. "Passive tracer transport in stochastic flows." In Stochastic Climate Models, 385–98. Basel: Birkhäuser Basel, 2001. http://dx.doi.org/10.1007/978-3-0348-8287-3_18.
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Klimova, Ekaterina G., and Gdaly S. Rivin. "Inverse Traces For The Passive Pollutants." In Air Pollution Modeling and Its Application XIII, 243–48. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-4153-0_24.
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Castaldo, Paolo. "Passive Energy Dissipation Devices." In Springer Tracts in Mechanical Engineering, 21–62. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-02615-2_2.
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Marchetta, Pietro, Walter de Donato, and Antonio Pescapé. "Detecting Third-Party Addresses in Traceroute Traces with IP Timestamp Option." In Passive and Active Measurement, 21–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36516-4_3.
Full textConference papers on the topic "Tracce passive"
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Gerard, Odile, Craig Carthel, and Stefano Coraluppi. "Estimating the number of beaked whales using an MHT tracker." In 2008 New Trends for Environmental Monitoring Using Passive Systems (PASSIVE 2008). IEEE, 2008. http://dx.doi.org/10.1109/passive.2008.4786999.
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Clark, Richard T., David M. Sheen, Jonathan R. Tedeschi, A. Mark Jones, and Thomas E. Hall. "High-resolution 3D microwave imaging using an optically tracked linear array." In Passive and Active Millimeter-Wave Imaging XXIII, edited by Duncan A. Robertson and David A. Wikner. SPIE, 2020. http://dx.doi.org/10.1117/12.2560396.
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Agurok, Ilya, Waqidi Falicoff, Roberto Alvarez, and Will Shatford. "Passive electro-optical projectiles tracker." In SPIE Defense, Security, and Sensing, edited by Edward M. Carapezza. SPIE, 2012. http://dx.doi.org/10.1117/12.919529.
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Reina, Giulio, Rocco Galati, Andrea Grazioso, Angelo Ugenti, and Giacomo Mantriota. "Introducing Polibot: A High Mobility Tracked Robot with Innovative Passive Suspensions." In 11th Asia-Pacific Regional Conference of the ISTVS. International Society for Terrain-Vehicle Systems, 2022. http://dx.doi.org/10.56884/qyuy9071.
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In the context of autonomous off-road mobility, tracked robots feature larger contact areas compared to equivalent wheeled vehicles, which turn into improved traction especially on soft terrains. This paper discusses a novel tracked robot, named Polibot, that is outfitted with passive articulated suspensions. The multibody model is developed within the MSC Adams environment leveraging on the Adams Tracked Vehicle (ATV) Toolkit. The different subsystems composing the vehicle assembly are outlined, with specific attention to the modeling strategies of the swing arms constituting the suspension system, as well as the characterization of the track belt and inertial properties. Efforts in validating the multibody twin against the real prototype are also presented, showing a good agreement in experiments performed on asphalt.
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Trevisan, Martino, Idilio Drago, and Marco Mellia. "Measuring Web Speed From Passive Traces." In ANRW '18: Applied Networking Research Workshop. New York, NY, USA: ACM, 2018. http://dx.doi.org/10.1145/3232755.3232780.
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Ross, Adam M., Donna H. Rhodes, and Daniel E. Hastings. "Using Pareto Trace to determine system passive value robustness." In 2009 3rd Annual IEEE Systems Conference. IEEE, 2009. http://dx.doi.org/10.1109/systems.2009.4815813.
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Nie, Jiangwu, Huadong Ma, and Lufeng Mo. "Passive Diagnosis for WSNs Using Data Traces." In 2012 IEEE 8th International Conference on Distributed Computing in Sensor Systems (DCOSS). IEEE, 2012. http://dx.doi.org/10.1109/dcoss.2012.63.
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Pe´rez Sa´nchez, Mari´a M., David Balam Tamayo, and Ricardo H. Cruz Estrada. "Design and Construction of a Dual Axis Passive Solar Tracker, for Use on Yucata´n." In ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/es2011-54428.
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In this investigation, we propose to use the thermal expansion properties of metals in a bimetallic strip as a base of operation of a passive solar tracker. The design process involved the determination of all aspects necessary to make a first prototype based on requirements and operating conditions previously identified. Predictive mathematical models were used to decide critical aspects. Certainly, some aspects of the design were determined experimentally to ensure the proper functioning of the solar tracker. The product of this research was the construction of a prototype with the ability to be placed with an average angular difference of 25 degrees to the position of the sun, under controlled conditions. The device created is a passive solar tracker with two degrees of freedom, one used to track the sun daily, operates automatically actuated by the bimetallic strip, the other one is manually adjusted in seasonal changes to compensate the variation in the decline of the sun along the year. Although the accuracy of the system is low, the cost of production is well below the purchase price of any commercial solar tracker, and its construction is simple, making it an economical alternative to increase the production of photovoltaic energy on a PV panel currently fixed.
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Fischer, H., C. Blom, and H. Oelhaf. "MIPAS (Michelson Interferometer for Passive Atmospheric Sounding)." In Optical Remote Sensing of the Atmosphere. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/orsa.1991.othb5.
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Umbach, Richard E., and Lee K. Patton. "A two-stage tracker for passive multistatic radar." In 2014 IEEE Radar Conference (RadarCon). IEEE, 2014. http://dx.doi.org/10.1109/radar.2014.6875834.
Full textReports on the topic "Tracce passive"
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Huckaby, J. L., K. B. Olsen, D. S. Sklarew, J. C. Evans, and K. M. Remund. Measurements of waste tank passive ventilation rates using tracer gases. Office of Scientific and Technical Information (OSTI), September 1997. http://dx.doi.org/10.2172/552792.
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Shyu, Haw-Jye, and Yung P. Lee. Application of the Bearing Trace, Hough Transform (BTHT) to Passive Shipping Lane Monitoring. Fort Belvoir, VA: Defense Technical Information Center, January 1998. http://dx.doi.org/10.21236/ada337380.
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Dietz, R. N., and R. W. Goodrich. Measurement of HVAC system performance and local ventilation using passive perfluorocarbon tracer technology. Office of Scientific and Technical Information (OSTI), June 1995. http://dx.doi.org/10.2172/95262.
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Zhan, Lang, and Y. C. Yortsos. Identification of the Permeability Field of Porous Medium from the Injection of Passive Tracer. Office of Scientific and Technical Information (OSTI), October 1999. http://dx.doi.org/10.2172/13827.
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Lunden, Melissa, David Faulkner, Elizabeth Heredia, Sebastian Cohn, Darryl Dickerhoff, Federico Noris, Jennifer Logue, Toshifumi Hotchi, Brett Singer, and Max H. Sherman. Experiments to Evaluate and Implement Passive Tracer Gas Methods to Measure Ventilation Rates in Homes. Office of Scientific and Technical Information (OSTI), October 2012. http://dx.doi.org/10.2172/1172653.
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Hicks, Jacqueline. Trade Facilitation for Environmental Goods and Services. Institute of Development Studies, March 2021. http://dx.doi.org/10.19088/k4d.2021.038.
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This rapid review synthesises the literature from academic, policy, and knowledge institution sources on how reform in customs procedures can facilitate international trade in environmental goods and services. Overall, it finds that there is a general belief in the literature from the World Trade Organization (WTO), International Trade Center and World Bank, that streamlining customs procedures supports international trade in environmental goods. There is survey evidence that firms exporting environmental goods encounter difficulties with customs procedures at the point of entry. Previous trade facilitation projects have not considered trade in environmental goods, so provide no evidence about what has or has not worked well. The evidence base identified during this literature review was extremely small, and came largely from international trade institutions such as the WTO or World Bank, or research organisations working with them. Most of the references to trade in EGS and customs procedures were mentioned in passing as mutually compatible without going into further detail. One of the few documents to combine trade in EGS with trade facilitation is not available for public viewing.
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Dubeck, Margaret M., Jonathan M. B. Stern, and Rehemah Nabacwa. Learning to Read in a Local Language in Uganda: Creating Learner Profiles to Track Progress and Guide Instruction Using Early Grade Reading Assessment Results. RTI Press, June 2021. http://dx.doi.org/10.3768/rtipress.2021.op.0068.2106.
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The Early Grade Reading Assessment (EGRA) is used to evaluate studies and monitor projects that address reading skills in low- and middle-income countries. Results are often described solely in terms of a passage-reading subtask, thereby overlooking progress in related skills. Using archival data of cohort samples from Uganda at two time points in three languages (Ganda, Lango, and Runyankore-Rukiga), we explored a methodology that uses passage-reading results to create five learner profiles: Nonreader, Beginner, Instructional, Fluent, and Next-Level Ready. We compared learner profiles with results on other subtasks to identify the skills students would need to develop to progress from one profile to another. We then used regression models to determine whether students’ learner profiles were related to their results on the various subtasks. We found membership in four categories. We also found a shift in the distribution of learner profiles from Grade 1 to Grade 4, which is useful for establishing program effectiveness. The distribution of profiles within grades expanded as students progressed through the early elementary grades. We recommend that those who are discussing EGRA results describe students by profiles and by the numbers that shift from one profile to another over time. Doing so would help describe abilities and instructional needs and would show changes in a meaningful way.
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Ramsey, Andree L., Heather H. Furey, and Amy S. Bower. Overturning of the Subpolar North Atlantic Program (OSNAP): RAFOS Float Data Report June 2014 - January 2019. Woods Hole Oceanographic Institution, December 2022. http://dx.doi.org/10.1575/1912/29540.
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The Overturning in the Subpolar North Atlantic Program (OSNAP) is an international effort started in 2014 dedicated to achieving a better understanding of the link between dense-water formation and the meridional overturning circulation in the high-latitude North Atlantic. Moorings, gliders, and subsurface acoustically-tracked RAFOS floats have been used to collect temperature, salinity, and current data across the Labrador Sea, Irminger Sea, Reykjanes Ridge, Iceland Basin, Rockall-Hatton Plateau, and Rockall Trough. The specific objective of the OSNAP float program is to gather information on the pathways of the dense overflow waters transported by the deep limb of the overturning circulation and assess the connection of those pathways with currents observed crossing the OSNAP mooring line. This data report details the observations collected by 148 floats that were deployed for OSNAP during the summers of 2014, 2015, 2016 and 2017. Deployment locations were in the Iceland Basin, Irminger Sea, and in the Charlie-Gibbs Fracture Zone. Mission lengths ranged from 540-730 days, and the floats were ballasted to passively drift at a fixed pressure of either 1800, 2000, 2200, 2500, or 2800 dbar to tag the deep overflow water masses of the subpolar North Atlantic (Iceland-Scotland and Denmark Strait Overflow Waters).
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Johnston, Morgan, Sung-Chan Kim, and Mary Allison. Mobile Harbor, Alabama navigation study : ship simulation report. Engineer Research and Development Center (U.S.), October 2021. http://dx.doi.org/10.21079/11681/42300.
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Mobile Bay is a large estuary located in the southwest corner of Alabama, which connects to the Gulf of Mexico. Mobile Harbor contains the only port in the state that supports ocean-going vessels. Some of the larger vessels calling on the port experience transit delays and limited cargo capacity, so a study was conducted by the US Army Corps of Engineers, Mobile District (CESAM), and the Alabama State Port Authority to investigate channel improvements. In 2017, the US Army Engineer Research and Development Center (ERDC) assisted CESAM in screening proposed deepening and widening alternatives in Mobile Bay by completing a Feasibility Level Ship Simulation (FLSS) study using the ERDC Ship/Tow Simulator. These lower-resolution databases from the FLSS study were used as a foundation to complete a more robust navigation study in 2020 to test the proposed modifications to Mobile Harbor. During this study, three main areas were focused on: a bend easing, a passing lane, and a turning basin. Testing of the proposed design was evaluated over the course of 2 weeks with eight pilots. Assessment of the proposed modifications was accomplished through analysis of ship simulations completed by experienced local pilots, discussions, track plots, run sheets, and final pilot surveys.
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Kwon, Jaymin, Yushin Ahn, and Steve Chung. Spatio-Temporal Analysis of the Roadside Transportation Related Air Quality (STARTRAQ) and Neighborhood Characterization. Mineta Transportation Institute, August 2021. http://dx.doi.org/10.31979/mti.2021.2010.
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To promote active transportation modes (such as bike ride and walking), and to create safer communities for easier access to transit, it is essential to provide consolidated data-driven transportation information to the public. The relevant and timely information from data facilitates the improvement of decision-making processes for the establishment of public policy and urban planning for sustainable growth, and for promoting public health in the region. For the characterization of the spatial variation of transportation-emitted air pollution in the Fresno/Clovis neighborhood in California, various species of particulate matters emitted from traffic sources were measured using real-time monitors and GPS loggers at over 100 neighborhood walking routes within 58 census tracts from the previous research, Children’s Health to Air Pollution Study - San Joaquin Valley (CHAPS-SJV). Roadside air pollution data show that PM2.5, black carbon, and PAHs were significantly elevated in the neighborhood walking air samples compared to indoor air or the ambient monitoring station in the Central Fresno area due to the immediate source proximity. The simultaneous parallel measurements in two neighborhoods which are distinctively different areas (High diesel High poverty vs. Low diesel Low poverty) showed that the higher pollution levels were observed when more frequent vehicular activities were occurring around the neighborhoods. Elevated PM2.5 concentrations near the roadways were evident with a high volume of traffic and in regions with more unpaved areas. Neighborhood walking air samples were influenced by immediate roadway traffic conditions, such as encounters with diesel trucks, approaching in close proximity to freeways and/or busy roadways, passing cigarette smokers, and gardening activity. The elevated black carbon concentrations occur near the highway corridors and regions with high diesel traffic and high industry. This project provides consolidated data-driven transportation information to the public including: 1. Transportation-related particle pollution data 2. Spatial analyses of geocoded vehicle emissions 3. Neighborhood characterization for the built environment such as cities, buildings, roads, parks, walkways, etc.