Bibliographies thématiques / Explosive activity

Littérature scientifique sur le sujet « Explosive activity »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Explosive activity"

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Filippov, Vladimir, Andrey Eremenko et Igor Mokrousov. « GEOTECHNOLOGY IMPACT ON SEISMIC ACTIVITY OF THE AREA DURING MINING PROTECTIVE PILLAR IN CONDITIONS OF SHEREGESH DEPOSIT ». Interexpo GEO-Siberia 2, no 5 (2019) : 75–80. http://dx.doi.org/10.33764/2618-981x-2019-2-5-75-80.

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Analysis of blasting works during reserves mining of protective pillar of level-and-room mining and sublevel mining with application of mobile machinery is carried out. It is established that high power explosions, carried out within border of protective pillar, longtime impact on rock solid (up to 2 days and more). Each explosion forms seismic active zone in which shocks occur on the distance up to 400v and more. Converse to technology of sublevel caving with application of mobile machinery has excepted carrying out explosions with large mass of explosive materials (10t and more). Through a month, 20-30 explosions are carried out with mass of explosive material from 800-900kg up to 3000-3500 kg. Increasing of explosion number causes to the explosions produce seismic active zone and Impact to solid condition and near workings. But reduction of mass of explosive materials has caused to low frequent event. Mainly seismic events of 1 and 2 class happen.
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Kondratyev, V. N. « Magic nuclei at explosive dynamo activity ». EPJ Web of Conferences 107 (2016) : 10006. http://dx.doi.org/10.1051/epjconf/201610710006.

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Corradino, Claudia, Eleonora Amato, Federica Torrisi, Sonia Calvari et Ciro Del Negro. « Classifying Major Explosions and Paroxysms at Stromboli Volcano (Italy) from Space ». Remote Sensing 13, no 20 (13 octobre 2021) : 4080. http://dx.doi.org/10.3390/rs13204080.

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Stromboli volcano has a persistent activity that is almost exclusively explosive. Predominated by low intensity events, this activity is occasionally interspersed with more powerful episodes, known as major explosions and paroxysms, which represent the main hazards for the inhabitants of the island. Here, we propose a machine learning approach to distinguish between paroxysms and major explosions by using satellite-derived measurements. We investigated the high energy explosive events occurring in the period January 2018–April 2021. Three distinguishing features are taken into account, namely (i) the temporal variations of surface temperature over the summit area, (ii) the magnitude of the explosive volcanic deposits emplaced during each explosion, and (iii) the height of the volcanic ash plume produced by the explosive events. We use optical satellite imagery to compute the land surface temperature (LST) and the ash plume height (PH). The magnitude of the explosive volcanic deposits (EVD) is estimated by using multi-temporal Synthetic Aperture Radar (SAR) intensity images. Once the input feature vectors were identified, we designed a k-means unsupervised classifier to group the explosive events at Stromboli volcano based on their similarities in two clusters: (1) paroxysms and (2) major explosions. The major explosions are identified by low/medium thermal content, i.e., LSTI around 1.4 °C, low plume height, i.e., PH around 420 m, and low production of explosive deposits, i.e., EVD around 2.5. The paroxysms are extreme events mainly characterized by medium/high thermal content, i.e., LSTI around 2.3 °C, medium/high plume height, i.e., PH around 3330 m, and high production of explosive deposits, i.e., EVD around 10.17. The centroids with coordinates (PH, EVD, LSTI) are: Cp (3330, 10.7, 2.3) for the paroxysms, and Cme (420, 2.5, 1.4) for the major explosions.
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Corradino, Claudia, Eleonora Amato, Federica Torrisi, Sonia Calvari et Ciro Del Negro. « Classifying Major Explosions and Paroxysms at Stromboli Volcano (Italy) from Space ». Remote Sensing 13, no 20 (13 octobre 2021) : 4080. http://dx.doi.org/10.3390/rs13204080.

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Stromboli volcano has a persistent activity that is almost exclusively explosive. Predominated by low intensity events, this activity is occasionally interspersed with more powerful episodes, known as major explosions and paroxysms, which represent the main hazards for the inhabitants of the island. Here, we propose a machine learning approach to distinguish between paroxysms and major explosions by using satellite-derived measurements. We investigated the high energy explosive events occurring in the period January 2018–April 2021. Three distinguishing features are taken into account, namely (i) the temporal variations of surface temperature over the summit area, (ii) the magnitude of the explosive volcanic deposits emplaced during each explosion, and (iii) the height of the volcanic ash plume produced by the explosive events. We use optical satellite imagery to compute the land surface temperature (LST) and the ash plume height (PH). The magnitude of the explosive volcanic deposits (EVD) is estimated by using multi-temporal Synthetic Aperture Radar (SAR) intensity images. Once the input feature vectors were identified, we designed a k-means unsupervised classifier to group the explosive events at Stromboli volcano based on their similarities in two clusters: (1) paroxysms and (2) major explosions. The major explosions are identified by low/medium thermal content, i.e., LSTI around 1.4 °C, low plume height, i.e., PH around 420 m, and low production of explosive deposits, i.e., EVD around 2.5. The paroxysms are extreme events mainly characterized by medium/high thermal content, i.e., LSTI around 2.3 °C, medium/high plume height, i.e., PH around 3330 m, and high production of explosive deposits, i.e., EVD around 10.17. The centroids with coordinates (PH, EVD, LSTI) are: Cp (3330, 10.7, 2.3) for the paroxysms, and Cme (420, 2.5, 1.4) for the major explosions.
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Rădoi, Florin, Ion Gherghe et Alexandru Cămărășescu. « Experimental possibilities for industrial ventilation ». MATEC Web of Conferences 354 (2022) : 00030. http://dx.doi.org/10.1051/matecconf/202235400030.

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The activity of evaluation and verification of industrial ventilation installations has a strong preventive role in terms of explosion risk mainly due to the fact that of the three determining elements that can lead to an explosion phenomenon, ventilation installations can determine the presence of two elements namely the presence of fuel (gases, vapours, dusts, mists) and the source of initiation (hot surface, flame, sparks of mechanical origin, electrical sparks, static electricity, etc.). The development of experimental systems on„ which particular hazardous aspects that may occur during the operation of industrial ventilation systems can be studied are vital to avoid dangerous situations in the current operation of ventilation installations. Knowledge of the dynamics of formation of explosive / toxic / asphyxiating environments is achieved by analysing explosive mixtures in relation to specific explosive intervals and is one of the most important priorities in ensuring optimal health and safety at work in industrial activities. The information obtained by analysing the dynamics of the formation of explosive / toxic / asphyxiating atmospheres is extremely useful for personnel responsible for health and safety at work, because with their help relevant decisions can be made to ensure safety and health conditions at the level of industrial premises. The paper presents an experimental equipment usable for the study of industrial ventilation systems.
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Ripepe, M., M. Rossi et G. Saccorotti. « Image processing of explosive activity at Stromboli ». Journal of Volcanology and Geothermal Research 54, no 3-4 (janvier 1993) : 335–51. http://dx.doi.org/10.1016/0377-0273(93)90071-x.

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De la Cruz-Reyna, Servando. « Poisson-distributed patterns of explosive eruptive activity ». Bulletin of Volcanology 54, no 1 (décembre 1991) : 57–67. http://dx.doi.org/10.1007/bf00278206.

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Richards, Paul G., Douglas A. Anderson et David W. Simpson. « A survey of blasting activity in the United States ». Bulletin of the Seismological Society of America 82, no 3 (1 juin 1992) : 1416–33. http://dx.doi.org/10.1785/bssa0820031416.

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Abstract Statistical information on chemical explosions is needed in seismology, to evaluate the practical difficulties in identifying this very common type of seismic source from other seismic sources such as small earthquakes and small nuclear explosions. We have obtained data on blasting activity from three different sources: (1) overview information from the U.S. Bureau of Mines (USBM) on the total amount of chemical explosives used in the United States during 1987, with breakdowns into different explosive types, and usage by different states; (2) overview information from the Mine Safety and Health Administration (MSHA) on the numbers of mines, of different types, in the United States; and (3) detailed information from a private company (Vibra-Tech Engineers, Inc.) on total shot size and size of charge per delay for 20,813 blasts carried out in 1987 at 532 locations. Our procedure has been to extrapolate the detailed information contained in the 1987 Vibra-Tech data for a limited number of states and thus to obtain estimates for the whole country on numbers of shots and their size distribution. The extrapolation is constrained by the data from USBM (numbers of shots, sizes) and the MSHA (locations). Blasting activity does not fluctuate greatly from year to year and 1987 was representative of current practice. We find that about 2.2 million metric tons of chemical explosive are used annually in the continental U.S., principally in mining for coal and metal ores. On a typical work day, there are roughly 30 explosions greater than 50 tons, including about one greater than 200 tons. There was one industrial explosion in 1987 at about 1400 tons. For shots between 1 ton and 100 tons, the cumulative distribution has a b-value near unity; that is, if N is the number of shots (per year) greater than or equal to W tons, N ∝ 10 − b log ⁡ W = W − b with b roughly equal to 1. This result is similar to the size distribution of earthquakes greater than magnitude mb, N ∝ 10 − b m b . Almost all chemical explosions above 1 ton are ripple-fired. The typical shot uses 20 to 50 separate delays.
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Vasilescu, Gabriel, Robert Laszlo, Attila Kovacs, Edward Gheorghiosu, Daniela Rus, Ciprian Jitea, Cristian Radeanu, Stefan Ilici, Bogdan Garaliu-Buşoi et Claudia Miron. « Evaluation of the explosion risk specific to the preparation and storage activity of the simple explosive mixture type ANFO ». MATEC Web of Conferences 343 (2021) : 10001. http://dx.doi.org/10.1051/matecconf/202134310001.

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The paper presents the results of the theoretical and practical research regarding the evaluation of the explosion risk specific to the activity of preparation/storage activity of the ANFO type explosive mixture, based on the identification and systematic analysis of the potential dangers that can generate explosion events, in order to establish and substantiate the possible accidents main scenarios, as well as reference scenarios. From a structural point of view, each accident scenario, defined at the level of the industrial site analyzed, is configured procedurally in synthetic form, comprising typical sections of methodological approach, respectively: location, description of the consequences (unimportant, important), evaluation of the risk of explosion (identification, estimation and appreciation) and measures to prevent damage/measures to reduce the risk of explosion.
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Newton, Robert U., William J. Kraemer, Keijo Häkkinen, Brendan J. Humphries et Aron J. Murphy. « Kinematics, Kinetics, and Muscle Activation during Explosive Upper Body Movements ». Journal of Applied Biomechanics 12, no 1 (février 1996) : 31–43. http://dx.doi.org/10.1123/jab.12.1.31.

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The aim of this study was to investigate the kinematics, kinetics, and neural activation of the traditional bench press movement performed explosively and the explosive bench throw in which the barbell was projected from the hands. Seventeen male subjects completed three trials with a bar weight of 45% of the subject's previously determined 1RM. Performance was significantly higher during the throw movement compared to the press for average velocity, peak velocity, average force, average power, and peak power. Average muscle activity during the concentric phase for pectoralis major, anterior deltoid, triceps brachii, and biceps brachii was higher for the throw condition. It was concluded that performing traditional press movements rapidly with light loads does not create ideal loading conditions for the neuromuscular system with regard to explosive strength production, especially in the final stages of the movement, because ballistic weight loading conditions where the resistance was accelerated throughout the movement resulted in a greater velocity of movement, force output, and EMG activity.
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Thèses sur le sujet "Explosive activity"

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Ruiz, Mario Calixto Lees Jonathan M. « Analysis of explosive activity of Tungurahua volcano using seismic-acoustic data ». Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2007. http://dc.lib.unc.edu/u?/etd,757.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2007.
Title from electronic title page (viewed Dec. 18, 2007). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Geological Sciences." Discipline: Geology; Department/School: Geological Sciences.
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Meier, Kristina [Verfasser], et Matthias [Akademischer Betreuer] Hort. « Temporal Variability of Strombolian Explosive Activity at Yasur Volcano, Vanuatu / Kristina Meier. Betreuer : Matthias Hort ». Hamburg : Staats- und Universitätsbibliothek Hamburg, 2014. http://d-nb.info/1058213369/34.

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Caron, Benoît. « Contribution of distal ash deposits to the knowledge of explosive activity of Italian volcanoes insights for hazard zonation ». Paris 11, 2010. https://theses.hal.science/tel-00545633.

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En plus de la destruction des sites à proximités des volcans, l'accumulation de cendres volcaniques dans les zones distales peut causer de graves dommages. De plus l'évaluation de ces dangers n'est pas pleinement prise en compte dans les plans de mitigation actuels. L'étude de la dispersion des retombées pyroclastiques produites par les éruptions explosives des volcans Italiens lors du Quaternaire est le sujet de cette thèse. L'étude tephrostratigraphique de trois carottes lacustres des lacs de Shkodra et Ohrid (Albanie) et d'une carotte marine du Nord de la mer Ionienne a été réalisée. Dix-sept niveaux de tephra ont été corrélés aux éruptions explosives de A. D. 472, Avellino (3. 9 cal. Ka BP) du Vésuve, Monte Pilato (A. D. 1200), Gabellotto-Fiumebianco (8. 6 cal ka BP) et Monte Guardia (22 ka BP) de l'île de Lipari, FL (3. 4 cal. Ka BP) de l'Etna, Astroni (4. 2 cal. Ka BP), Agnano Monte Spina (4. 5 cal. Ka BP), Agnano Pomici Principali (12. 3 cal. Ka BP), SMP1-Y3 (31 ka) et l'Ignimbrite Campanienne-Y5 (39 ka) des Champs Phlégréens, X6 (107 ka) de la région Campanienne, et de P11 (131 ka) de l'île de Pantelleria. Cinq autres niveaux de tephra possèdent la composition que les dépôts de l'éruption vésuvienne de Mercato. Cela suggère une activité explosive entre les éruptions pliniennes de Mercato (8. 9 cal ka BP) et Avellino (3. 9 cal ka BP). Toutes ces données ont été intégrées, avec les données préexistantes de la littérature, dans la banque de données d'un SIG. Cette banque de données couplée à un SIG permet de grandement améliorer les dispersions des cendres et représente un outil qui améliore la mitigation des risques volcaniques dans la région centrale de la Méditerranée
In addition to the destruction of the sites close to the volcanoes, the accumulation of volcanic ash in distal zones can cause serious damages but the evaluation of the related hazard is not fully addressed in present day mitigation plans. The dispersion study joined with the physical and geochemical characterization, of distal pyroclastics deposits produced by explosive eruption of Italian volcanoes during late Quaternary was the focus of this PhD project. The distal deposits were investigated through the tephrostratigraphic study of three lacustrine cores from Lake Shkodra and Lake Ohrid (Albania), and one marine core from the northern Ionian Sea. Seventeen tephra layers were correlated with explosive eruptions of A. D. 472, Avellino (3. 9 cal. Ka BP) from Somma-Vesuvius, Monte Pilato (A. D. 1200), Gabellotto-Fiumebianco (8. 6 cal ka BP) and Monte Guardia (22 ka BP) from Lipari Island, FL (3. 4 cal. Ka BP) from Mount Etna, Astroni (4. 2 cal. Ka BP), Agnano Monte Spina (4. 5 cal. Ka BP), Agnano Pomici Principali (12. 3 cal. Ka BP), SMP1-Y3 (31 ka) and Campanian Ignimbrite-Y5 (39 ka) from Phlegrean Fields, X6 (107 ka) from Campanian, P11 tephra layer (131 ka) from Pantelleria Island. Five other tephra layers have the Mercato deposit composition from Somma-Vesuvius. This suggests the occurrence of interplinian activity between the eruptions of Mercato (8. 9 cal ka BP) and Avellino (3. 9 cal ka BP). All the data were collated into a GIS and integrated with literature data. This data-base implemented in a GIS environment allows a significant improvement of the ash dispersal and represents an useful tool for the improvement of volcanic hazard mitigation in Central Mediterranean area
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Bennett, Benjamin A. « Development of a methodology for evaluating and anticipating Improvised Explosive Device threat activity using a fault tree based process ». Connect to this title online, 2009. http://etd.lib.clemson.edu/documents/1246565801/.

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Walsh, Lucy. « Implications for Volcanic Hazards in the Central and Southern Cascades Based on Gas Emissions During Explosive Cinder Cone Activity ». Thesis, University of Oregon, 2013. http://hdl.handle.net/1794/12977.

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Volatile emissions from Cascades cinder cone eruptions have been well-documented; however the implications for understanding the effects that volcanic gases have on surrounding communities have not been addressed. This study examines the hazards from volatile degassing during explosive activity by (1) analyzing S, Cl, and F concentrations dissolved in olivine-hosted melt inclusions and matrix glass from cinder cones located in central Oregon and northern California, (2) estimating the mass of volcanic gas degassed during these eruptions, and (3) predicting gas concentrations downwind of the vent. Analyses reveal that the magmas degassed >88% S, <49% Cl, and <50% F during eruption, equating to a release of ≤4.5 Mt SO2, ≤0.2 Mt HCl, and ≤0.2 Mt HF. Predictions of gas concentrations downwind of the vent provides reassurance that the levels of volcanic gases were not high enough at the time of eruption to present acute or severe health hazards to nearby residents.
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Preece, Katie. « Transitions between effusive and explosive activity at Merapi volcano, Indonesia : a volcanological and petrological study of the 2006 and 2010 eruptions ». Thesis, University of East Anglia, 2014. https://ueaeprints.uea.ac.uk/49599/.

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The 2010 explosive eruption (VEI 4) of Merapi volcano, Indonesia, was the volcano’s largest since 1872. In contrast, volcanism over the last century has been characterised by dome-building and gravitational dome collapse, such as in 2006 (VEI 1). The driving forces behind effusive and explosive activity, as well as factors that affect transitions in eruptive style are investigated through petrological and textural analysis, using the well-documented 2006 and 2010 eruptions as case-studies. Pre- and syn-eruptive crystallisation and degassing processes are examined via whole rock geochemical analysis, mineral compositions and thermobarometry, quantitative textural analysis of feldspar microlites and analysis of volatiles and light lithophile elements in melt inclusions. These data were gathered from a detailed set of stratigraphically controlled samples, correlated to eruptive chronology and style, which were collected during several field campaigns. Both the 2006 and 2010 eruptions produced basaltic andesite, similar in terms of major and trace element compositions. A major zone of crystallisation is proposed at between ~ 14 and 29 km depth, although crystallisation occurs throughout the crust. Magmatic temperatures are estimated to be ~920–1020 °C. Maximum H2O contents reach 3.94 wt.% in 2010 melt inclusions and up to 3.73 wt.% in those from 2006. CO2 concentrations are < 200 ppm, although they may reach up to 695 ppm in some melt inclusions from the 2010 eruption. An exsolved brine phase was present during both eruptions which “buffered” melt Cl concentrations and enriched Li at shallow depths within the conduit or edifice. Eruptive style and transitions at Merapi are linked to magma ascent rate, crystallisation and open- and closed-degassing processes, which can be influenced by magma influx. The findings of this work are crucial for understanding the full range of eruptive behaviour that Merapi is capable of producing.
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Faezi, Farnaz [Verfasser], George [Gutachter] Coupland, Maria [Gutachter] Albani et Martin [Gutachter] Hülskamp. « The role of pectin methylesterase activity in explosive seed dispersal in Cardamine hirsuta / Farnaz Faezi ; Gutachter : George Coupland, Maria Albani, Martin Hülskamp ». Köln : Universitäts- und Stadtbibliothek Köln, 2018. http://d-nb.info/1162620781/34.

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Eychenne, Julia. « Budgets éruptifs et origine des paroxysmes explosifs andésitiques en système ouvert : l'éruption d'août 2006 du Tungurahua en Equateur ». Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2012. http://tel.archives-ouvertes.fr/tel-00741974.

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Plusieurs volcans andésitiques dans le monde connaissent des périodes d'activité en système ouvert pendant plusieurs années, décennies voire siècles, qui sont caractérisées par des manifestations éruptives persistantes d'intensité fluctuante et ponctuées de phases explosives violentes et dangereuses, souvent accompagnées d'écoulements pyroclastiques. La compréhension de la dynamique et de l'origine de ces paroxysmes en système ouvert est un enjeu majeur de la recherche volcanologique dans le but d'améliorer la surveillance de ce type d'activité. Le Tungurahua en Equateur est un excellent exemple pour étudier un système andésitique ouvert : entré en activité en 1999, le volcan a connu une phase paroxysmale en août 2006, avec l'émission d'un panache éruptif de 15 km de hauteur et la mise en place d'écoulements pyroclastiques. Les objectifs de cette thèse sont, à partir de l'étude du dépôt de retombée, d'explorer la dynamique d'un volcan andésitique fonctionnant en système ouvert en étudiant le cas du paroxysme explosif du Tungurahua et de développer une méthode de suivi haute-résolution des budgets éruptifs massiques, transposable à différentes phases éruptives et différents volcans. A l'aide d'une déconvolution automatique des distributions granulométriques bimodales du dépôt, deux sous-populations ont été caractérisées et quantifiées. Ces dernières reflètent la syn-sédimentation de particules grossières depuis le panache éruptif, et de particules fines depuis des nuages co-écoulements pyroclastiques. Cette analyse granulométrique couplée à l'étude de l'amincissement du dépôt indiquent un volume total minimum de 42×106 m3 et un panache de 16-18 km au dessus du cratère. Cette éruption est classée comme une VEI 3 de type subplinien. Un nouveau protocole d'analyses de type et densité de clastes révèle une distribution sigmoïdale des densités des particules vésiculées avec la granulométrie. Cette loi empirique permet de déterminer la charge massique de chaque classe de constituants latéralement dans le dépôt à partir des données de comptage de grains. L'intégration des lois de décroissance massique exponentielle et puissance de chaque classe de constituant dans le dépôt permet d'estimer leur masse totale. Ces budgets massiques indiquent une magnitude~3,5 et une intensité ~9,2. La faible masse de ponces acides (<0.4 wt.%) exclus une origine par mélange de magma. Une proportion de ~98 wt.% et la faible densité de produits juvéniles révèle le caractère magmatique de l'éruption et l'absence d'interactions phréato-magmatiques. Les xénoclastes témoignent d'une fragmentation et d'une érosion des 2 km supérieurs du conduit. Des analyses morphologiques de particules menées avec un outil automatique et innovant (Morphologi G3 de Malvern) montrent le caractère hautement vésiculé des particules juvéniles et la faible viscosité de la lave. L'explosivité élevée d'août 2006 apparaît comme une manifestation extrême d'un système ouvert alimenté par des injections irrégulières de magma andésitique profond. L'activité du Tungurahua depuis 1999 définit un système caractérisé par un conduit très ouvert, une lave peu visqueuse et un dégazage par le biais d'explosions stromboliennes de faibles à hautes intensités. La méthode de détermination des budgets éruptifs est un atout majeur pour le suivi et la surveillance des phases éruptives en système ouvert.
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McAllister, Jennifer E. « The Mutagenic Activity of High-Energy Explosives ; Contaminants of Concern at Military Training Sites ». Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20175.

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The genotoxicity of energetic compounds (i.e., explosives) that are known to be present in contaminated soils at military training sites has not been extensively investigated. Thus, the Salmonella mutagenicity and Muta(TM)Mouse assays were employed as in vitro assays to examine the mutagenic activity of twelve explosive compounds, as well as three soil samples from Canadian Forces Base Petawawa. Salmonella analyses employed strains TA98 (frameshift mutations) and TA100 (base-pair substitution mutations), as well as the metabolically-enhanced YG1041 (TA98 background) and YG1042 (TA100 background), with and without exogenous metabolic activation (S9). For Salmonella analyses, the results indicate that ten of the explosive compounds were mutagenic, and consistently elicited direct-acting, base-pair substitution activity. All three soil samples were also observed to be mutagenic, eliciting direct-acting, frameshift activity. Mutagenic potencies were significantly higher on the metabolically-enhanced strains for all compounds and soil samples. For Muta(TM)Mouse analyses on FE1 cells, the results indicate that the majority of explosive compounds did not exhibit mutagenic activity. All three soil samples elicited significant positive responses (PET 1 and PET 3 without S9, and PET 2 with S9), and although there is some evidence of a concentration-related trend, the responses were weak. Correspondence of the mutagenic activity observed with the two assay systems, for both the explosive compounds and soil samples, was negligible. The differential response is likely due to differences in metabolic capacity between the two assay systems. Furthermore, it is likely that there are unidentified compounds present in these soil samples that are, at least in part, responsible for the observed mutagenic activity. Additional testing of other explosive compounds, as well as soil samples from other military training sites, using a variety of in vitro and in vivo assays, is warranted in order to reliably estimate mutagenic hazard and subsequently assess risk to human health.
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Bolliet, Olivier. « Les indicateurs neurovégétatifs de la préparation à l'action dans les activités sportives de force explosive ». Lyon 1, 2004. http://www.theses.fr/2004LYO10079.

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Les études psychophysiologiques de la concentration sportive ont souvent porté sur des disciplines où la contrainte énergétique est faible. L'analyse de l'activité neurovégétative constitue un molèle inférentiel des opérations mentales contrôlées par le système nerveux central. En utilisant des microcapteurs non-invasifs, on dispose d'une méthode ambulatoire permettant d'étudier, en situation réelle, les processus mentaux de préparation à l'action. Les résultats montrent une élévation sélective de l'activation et de l'attention lors de la concentration, en fonction des exigences et des contraintes des activités sportives étudiées. L'élévation de l'attention servirait à construire l'image mentale du geste, partiellement ou totalement. De ce fait, elle pourrait être induite plus facilement par l'observation du mouvement à réaliser. Les différentes modalités d'observation d'un mouvement simple (virtuelle ou réelle)̀ entraînent une activité neurovégétative semblable
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Livres sur le sujet "Explosive activity"

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John, Atkinson, dir. Go big with small groups : Eleven steps to an explosive small group ministry. Nashville, TN : Abingdon Press, 2007.

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Lincei, Accademia nazionale dei, et British Council, dir. Large explosive eruptions : (the problems of eruption forecasting and warning--limits and possibilities) : international symposium sponsored by the Accademia nazionale dei Lincei and the British Council (Rome, 24-25 May 1993). Roma : Accademia nazionale dei Lincei, 1994.

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Argolo, José. A direita explosiva no Brasil. Rio de Janeiro, RJ : MAUAD, 1996.

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Emotion explosion ! : 40 devotions for preteen ministry. Loveland, Colo : Group Pub., 2000.

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Fowler, Andrew. The most dangerous man in the world : The explosive true story of Julian Assange and the lies, cover-ups, and conspiracies he exposed. New York : Skyhorse Publishing, 2013.

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Leonard, Elmore. Freaky Deaky. New York : Warner Books, 1989.

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Leonard, Elmore. Freaky deaky. New York : Harper, 2011.

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Leonard, Elmore. Freaky Deaky. New York : HarperCollins, 2002.

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Leonard, Elmore. Les fantômes de Detroit. Paris : Presses de la Cité, 1989.

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Leonard, Elmore. Freaky Deaky. Boston, Mass : G.K. Hall, 1989.

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Chapitres de livres sur le sujet "Explosive activity"

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Fink, J. H., et C. R. Manley. « Explosive Volcanic Activity Generated from Within Advancing Silicic Lava Flows ». Dans IAVCEI Proceedings in Volcanology, 169–79. Berlin, Heidelberg : Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-73759-6_11.

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Imre, Soós, Gyagya Attila, Kósa Lili, K. J. Finn et Ihász Ferenc. « Analysis of Explosive Force, Sprint Distance and High-Intensity Running in a Match Situation Between Hungarian Second-Division Soccer Players ». Dans Innovation in Physical Activity and Sport, 3–8. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-92897-1_1.

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Sulpizio, Roberto, Gianluca Groppelli, Donatella Insinga, Stefano Branca, Paola Del Carlo, Stella Tamburrino et Giovanni Zanchetta. « The Large Explosive Activity of Mt. Etna as Recorded in Distal Tephrostratigraphy ». Dans Springer Geology, 1281–83. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04364-7_245.

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Morandi, Andrea, Andrea Di Muro, Claudia Principe, Laurent Michon, Gabrielle Leroi, Francesco Norelli et Patrick Bachèlery. « Pre-historic (<5 kiloyear) Explosive Activity at Piton de la Fournaise Volcano ». Dans Active Volcanoes of the Southwest Indian Ocean, 107–38. Berlin, Heidelberg : Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-31395-0_8.

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Simić, Mitar, Ross Gillanders, Aleksej Avramović, Slavica Gajić, Vedran Jovanović, Vladan Stojnić, Vladimir Risojević et al. « Honeybee Activity Monitoring in a Biohybrid System for Explosives Detection ». Dans IFMBE Proceedings, 185–92. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17971-7_29.

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Teymouri, Farzaneh, Hasan Alizadeh, Lizbeth Laureano-Pérez, Bruce Dale et Mariam Sticklen. « Effects of Ammonia Fiber Explosion Treatment on Activity of Endoglucanase from Acidothermus cellulolyticus in Transgenic Plant ». Dans Proceedings of the Twenty-Fifth Symposium on Biotechnology for Fuels and Chemicals Held May 4–7, 2003, in Breckenridge, CO, 1183–91. Totowa, NJ : Humana Press, 2004. http://dx.doi.org/10.1007/978-1-59259-837-3_95.

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Esposito, Antonietta M., Luca D’Auria, Flora Giudicepietro et Marcello Martini. « Waveform Variation of the Explosion-Quakes as a Function of the Eruptive Activity at Stromboli Volcano ». Dans Neural Nets and Surroundings, 111–19. Berlin, Heidelberg : Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-35467-0_12.

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Barbaglia, Luca, Sergio Consoli, Sebastiano Manzan, Diego Reforgiato Recupero, Michaela Saisana et Luca Tiozzo Pezzoli. « Data Science Technologies in Economics and Finance : A Gentle Walk-In ». Dans Data Science for Economics and Finance, 1–17. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66891-4_1.

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AbstractThis chapter is an introduction to the use of data science technologies in the fields of economics and finance. The recent explosion in computation and information technology in the past decade has made available vast amounts of data in various domains, which has been referred to as Big Data. In economics and finance, in particular, tapping into these data brings research and business closer together, as data generated in ordinary economic activity can be used towards effective and personalized models. In this context, the recent use of data science technologies for economics and finance provides mutual benefits to both scientists and professionals, improving forecasting and nowcasting for several kinds of applications. This chapter introduces the subject through underlying technical challenges such as data handling and protection, modeling, integration, and interpretation. It also outlines some of the common issues in economic modeling with data science technologies and surveys the relevant big data management and analytics solutions, motivating the use of data science methods in economics and finance.
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Zobin, Vyacheslav M. « Swarms of Microearthquakes Associated with Effusive and Explosive Activity at Volcanoes ». Dans Introduction to Volcanic Seismology, 355–80. Elsevier, 2012. http://dx.doi.org/10.1016/b978-0-444-56375-0.00016-5.

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Zobin, Vyacheslav M. « Swarms of Microearthquakes Associated With Effusive and Explosive Activity at Volcanoes ». Dans Introduction to Volcanic Seismology, 389–416. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-444-63631-7.00016-9.

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Actes de conférences sur le sujet "Explosive activity"

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Capuzzo‐Dolcetta, R. « Galactic nuclei formation and activity induced by globular cluster merging ». Dans THE MULTICOLORED LANDSCAPE OF COMPACT OBJECTS AND THEIR EXPLOSIVE ORIGINS. American Institute of Physics, 2007. http://dx.doi.org/10.1063/1.2774952.

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Moreland, W. M., T. Thordarson et B. F. Houghton. « NATURE OF EXPLOSIVE ACTIVITY IN THE 10TH CENTURY ELDGJA ERUPTION, ICELAND ». Dans 113th Annual GSA Cordilleran Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017cd-292830.

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Taddeucci, Jacopo, Piergiorgio Scarlato, Elisabetta Del Bello, Giancarlo Tamburello et Damien Gaudin. « Eruptions from UV to TIR : multispectral high-speed imaging of explosive volcanic activity ». Dans Hyperspectral Imaging and Sounding of the Environment. Washington, D.C. : OSA, 2018. http://dx.doi.org/10.1364/hise.2018.hm2c.2.

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Wieser, Penny, Marie Edmonds, Cheryl Gansecki, John Maclennan, Frances E. Jenner, Barbara E. Kunz, Paula Antoshechkina, Frank Trusdell et Lopaka Lee. « EXPLOSIVE ACTIVITY ON KĪLAUEA’S LOWER EAST RIFT ZONE FUELLED BY A VOLATILE-RICH, DACITIC MELT ». Dans GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-379565.

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Dorn, Tim W., Yi-Chung Lin, Anthony G. Schache et Marcus G. Pandy. « Which Muscles Power the Human Running Stride ? » Dans ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80065.

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Running is a physically demanding activity that requires explosive delivery of muscle power to the ground during stance, and precise, yet rapid limb coordination during swing. In particular, as running speed increases, greater metabolic energy in the form of muscle mechanical work is required to power the motion of: i) the center-of-mass (i.e., external power); and ii) the individual limb segments (i.e., internal power) [1,2]. The purpose of this study was to quantify the contributions that individual muscles make to the external and internal power of the body across a range of running speeds so as to identify the key muscle groups in coordinating a full running stride.
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Nicolescu, Cristian, Izabella Kovacs, Artur-George Gaman, Daniel Pupazan et Andrei Gireada. « STUDIES ON THE PRACTICAL TRAINING OF INTERVENTION AND RESCUE PERSONNEL IN TOXIC / EXPLOSIVE / FLAMMABLE ENVIRONMENTS USING VIRTUAL REALITY ». Dans 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022/1.1/s03.048.

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In recent years, virtual reality developers have managed to create an artificial environment that can simulate reality so that the user has the impression of an almost real physical presence in the virtual world. By overlapping and synchronizing projected images with spatial sounds and even with forces that interact with the user, the user is detached from the real environment and an all-encompassing involvement in the virtual world occurs. Virtual reality is frequently present in aviation, medicine, military training and other top fields. Advantages of using a virtual environment are obvious for areas where inexperience can cause loss of life and material loss. Although participants are immersed in the virtual environment scenario, errors produced allow an assessment of mistakes made and their correction, the experience gained being then used in the realworld professional activity. Through experiencing the virtual environment, fear of various dangers can be overcome, dangers that cannot be simulated in reality can easily be simulated, so that objectives of training can be met. The aim of the paper is to provide rescuers with certain training scenarios which create opportunities to interact with elements of the virtual space to fulfil the purpose of training.
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Čech, Pavol, et Pavel Ružbarský. « Relationships between physical activity, motor performance and body composition in school-age children ». Dans 12th International Conference on Kinanthropology. Brno : Masaryk University Press, 2020. http://dx.doi.org/10.5817/cz.muni.p210-9631-2020-28.

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Introduction: Physical activity (PA) performed at recommended levels is associated with mul-tiple health benefits. However, as indicated by the available studies, the volume of habitual physical activity of children continuously decreases. Aim: The aim of the study was to assess the relationships between physical activity per-formed by school-age population and indicators of motor performance and body composition. Methods: The research group consisted of 144 students of the primary school assigned into groups according to the years of study (first, fifth and eighth-year students). The amount of physical activity was examined through a non-direct method, using Fels PAQ, recording four scores, namely sport index, leisure index, work (chore) index and total score. Body composition was tested using a direct segmental multi-frequency bioelectric impedance analysis (DSM-BIA). Motor performance was assessed in four categories. Endurance and strength endurance were assessed using Jacik’s motor test; strength abilities were measured using a hand grip test; speed abilities were tested in linear sprints at 5 and 10 meters and in the test of speed with changes of direction at 4 x 10 m and, finally, explosive strength was assessed from results of the countermovement jump (CMJ), squat jump (SJ) and 10-second repeated jumps tests. The strength of association between the selected factors was determined from the results using the Spearman’s rank correlation analysis. Results: The amount of physical activity was mainly associated with the indicators of active body mass (fat free mass, skeletal muscle mass) in all age categories. Low association was found in the parameters of adipose tissue (body fat percentage, visceral fat level). When assessing the strength of association between the characteristics of motor performance and physical activity performed, we observed various courses of associations, based on which it is not possible to determine the tendency. When assessing the relationship between the amount of physical activity and motor performance of students regardless of age, we found medium association only with indicators of strength abilities (hand grip test) and characteris-tics of speed abilities. Conclusions: The results are not explicit but they point to some tendencies in relationships between habitual physical performance and body composition indicators. With respect to mo-tor performance, it is not possible to consider these results decisive; therefore, further data collection and more accurate assessment of relationships are necessary.
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Birkes, Angela Y., Chien H. Hsiung, Tal Cohen et Robert E. Fulton. « A Prototype Multimedia Auto Broker ». Dans ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium collocated with the ASME 1995 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/edm1995-0846.

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Abstract Intelligent, easy to use, and entertaining multimedia information brokers are vital to the explosive role of information technology. With the advent of interactive television and the information superhighway in the near future, information management systems (information brokers) for consumer services and products will be necessary. This paper describes the application requirements process and subsequent prototyping efforts for a multimedia auto broker. The research activity presented has distinct phases which overlap and take place concurrently in some instances. The phases include a knowledge acquisition phase, applications requirements definition phase, and testing and validation phase. The details of each of these phases which led to the prototype multimedia auto broker are characterized, followed by a brief introduction of effort underway for the system architecture, and recommendations for generalizing the multimedia information broker to other applications.
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Yankova, Neli, et Valentin Panayotov. « EFFECTS OF OLYMPIC WEIGHTLIFTING TRAINING METHODS ON MOTOR ABILITIES IN ». Dans INTERNATIONAL SCIENTIFIC CONGRESS “APPLIED SPORTS SCIENCES”. Scientific Publishing House NSA Press, 2022. http://dx.doi.org/10.37393/icass2022/13.

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ABSTRACT Introduction. The Olympic weightlifting training methodology is a powerful tool for developing motor abilities and overall fitness. In addition, it is well established that these activities have a positive effect on the physical development of adolescents. It is important that the preparation is conducted under professional coaching in sports clubs to guarantee the achievement of good sports performance without injuries. Methodology. The goal of this study is to identify the changes that occur in the physical performance of 13-15-year-old cadets (boys), under the influence of specialized training with the means of Olympic weightlifting. 30 weightlifters aged 14 on average participated in the experiment. The study was conducted in September 2021. Results. Based on the results, we can conclude that overall the structured specialized Olympic weightlifting training protocol positively affects explosive strength, speed, and flexibility in 13-15-year-old cadets. However, the results show significant between-group variability when stratified by age. Discussion and conclusions. Habitual Olympic weightlifting training is not a very popular activity among children and adolescents. It is generally considered risky and not appropriate for youngsters. However, our results painted a different picture, and based on them and our practical experience, in our opinion, if the methodology is properly modified, Olympic weightlifting is a powerful tool for the development of motor abilities in trainees of different age groups.
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Panayotov, Valentin, et Neli Yankova. « INFLUENCE OF OLYMPIC WEIGHTLIFTING TRAINING ON MOTOR ABILITIES IN CHILDREN ». Dans INTERNATIONAL SCIENTIFIC CONGRESS “APPLIED SPORTS SCIENCES”. Scientific Publishing House NSA Press, 2022. http://dx.doi.org/10.37393/icass2022/11.

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ABSTRACT Introduction. One of the main goals of the Olympic weightlifting training process is to ensure a healthy motor training regime. Those activities are aimed at achieving tangible positive effects on the body, as well as providing adequate conditions for the physical development of trainees. Preparation under professional coaching in sports clubs guarantees the achievement of good sports performance. Methodology. The goal of this study is to identify the changes that occur in the physical performance of children (boys), under the influence of specialized training with the means of Olympic weightlifting. Eighteen (18) weightlifters aged 13 participated in the experiment. The study was conducted in two stages: the baseline data were collected in June 2020, and the final measurements were in June 2022. Results. Based on the results, we can conclude that the structured, specialized Olympic weightlifting training protocol positively affects explosive strength of lower limbs, speed, and flexibility in 13-year-old children. Discussion and conclusions. Habitual Olympic weightlifting training is not a very popular activity among children. It is generally considered risky and not appropriate for youngsters. However, our results painted a different picture, and based on them and our practical experience, in our opinion, if the methodology is properly modified, Olympic weightlifting is a powerful tool for the development of motor abilities in children.
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Rapports d'organisations sur le sujet "Explosive activity"

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Jefferson, Brian. Reviewing Information Technology, Surveillance, and Race in the US. Just Tech, Social Science Research Council, mai 2022. http://dx.doi.org/10.35650/jt.3033.d.2022.

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The past decade has been marked by a growing awareness of the potential harms of personal computing. This recent development was spurred by a surge of news reports, films, and studies on the unforeseen side effects of constantly using networked devices. As a result, the public has become increasingly aware of the cognitive, ideological, and psychological effects associated with the constant use of personal computing devices. Alongside these revelations, a growing chorus of activists, journalists, organizers, and scholars have turned attention to surveillance technology-related matters of a different kind—those related to the carceral state and border patrol. These efforts have sparked a shift in the public consciousness, from individual experiences of technology users to how technology is used to maintain social divisions. These studies show how the explosion of network devices not only changes society but also maintains longstanding divisions between social groups. This field review highlights key concepts and discussions on information technology, surveillance, carceral governance, and border patrol. Specifically, it explores the evolution of information communication technology and racial surveillance from the late nineteenth century until the present. The review concludes by exploring avenues for bringing these conversations into a transnational dialogue on surveillance, technology, and social inequality moving forward.
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Barquet, Karina, Elin Leander, Jonathan Green, Heidi Tuhkanen, Vincent Omondi Odongo, Michael Boyland, Elizabeth Katja Fiertz, Maria Escobar, Mónica Trujillo et Philip Osano. Spotlight on social equity, finance and scale : Promises and pitfalls of nature-based solutions. Stockholm Environment Institute, juin 2021. http://dx.doi.org/10.51414/sei2021.011.

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Human activity has modified and deteriorated natural ecosystems in ways that reduce resilience and exacerbate environmental and climate problems. Physical measures to protect, manage and restore these ecosystems that also address societal challenges in sustainable ways and bring biodiversity benefits are sometimes referred to as “nature-based solutions” (NBS). For example, reducing deforestation and restoring forests is a major opportunity for climate mitigation, while protecting or restoring coastal habitats can mitigate damage to coastal areas from natural hazard events, in addition to potentially providing co-benefits related to livelihood, recreation, and biodiversity. There is now an impetus to shift towards greater deployment of nature-based solutions. Not only do they offer an alternative to conventional fossil fuel-based or hard infrastructure solutions but, if implemented correctly, they also hold great promise for achieving multiple goals, benefits and synergies. These include climate mitigation and resilience; nature and biodiversity protection; and economic and social gains. 2020 saw an explosion in publications about NBS, which have contributed to filling many of the knowledge gaps that existed around their effectiveness and factors for their success. These publications have also highlighted the knowledge gaps that remain and have revealed a lack of critical reflection on the social and economic sustainability aspects of NBS. Building on these gaps, we decided to launch this mini-series of four briefs to provoke a more nuanced discussion that highlights not only the potential benefits, but also the potential risks and trade-offs of NBS. The purpose is not to downplay the importance of NBS for biodiversity, ecosystems, and coastal mitigation and adaptation, but to ensure that we establish a dialogue about ways to overcome these challenges while leaving no one behind.
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Kurmann, André, Étienne Lalé et Lien Ta. Measuring Small Business Dynamics and Employment with Private-Sector Real-Time Data. CIRANO, août 2022. http://dx.doi.org/10.54932/xsph3669.

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The COVID-19 pandemic has led to an explosion of research using private-sector datasets to measure business dynamics and employment in real-time. Yet questions remain about the representativeness of these datasets and how to distinguish business openings and closings from sample churn – i.e., sample entry of already operating businesses and sample exits of businesses that continue operating. This paper proposes new methods to address these issues and applies them to the case of Homebase, a real-time dataset of mostly small service-sector sector businesses that has been used extensively in the literature to study the effects of the pandemic. We match the Homebase establishment records with information on business activity from Safegraph, Google, and Facebook to assess the representativeness of the data and to estimate the probability of business closings and openings among sample exits and entries. We then exploit the high frequency / geographic detail of the data to study whether small service-sector businesses have been hit harder by the pandemic than larger firms, and the extent to which the Paycheck Protection Program (PPP) helped small businesses keep their workforce employed. We find that our real-time estimates of small business dynamics and employment during the pandemic are remarkably representative and closely fit population counterparts from administrative data that have recently become available. Distinguishing business closings and openings from sample churn is critical for these results. We also find that while employment by small businesses contracted more severely in the beginning of the pandemic than employment of larger businesses, it also recovered more strongly thereafter. In turn, our estimates suggests that the rapid rollout of PPP loans significantly mitigated the negative employment effects of the pandemic. Business closings and openings are a key driver for both results, thus underlining the importance of properly correcting for sample churn.
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