Academic literature on the topic 'Centre of ma'
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Journal articles on the topic "Centre of ma"
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Skulski, Thomas, Don Francis, and John Ludden. "Volcanism in an arc-transform transition zone: the stratigraphy of the St. Clare Creek volcanic field, Wrangell volcanic belt, Yukon, Canada." Canadian Journal of Earth Sciences 29, no. 3 (March 1, 1992): 446–61. http://dx.doi.org/10.1139/e92-039.
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The St. Clare Creek volcanic field in the southwestern Yukon overlies a tectonic transition in the Wrangell volcanic belt between subduction to the northwest in Alaska and transform faulting along the Duke River fault in the southeast. Two large polygenetic volcanic centres dominated the Miocene landscape of the St. Clare Creek field: the 18–16 Ma Wolverine centre and the 16–10 Ma Klutlan centre. The Wolverine centre evolved from a small alkaline shield volcano at 18 Ma, from which alkaline basalts, hawaiites and mugearites erupted, to a larger composite volcano between 18 and 16 Ma composed of transitional basalt, basaltic trachyandesite, trachyte and rhyolite lavas, and pyroclastic rocks. The youngest Wolverine lavas are calc-alkaline basaltic andesites, andesites, and hybrid lavas (transitional–calc-alkaline). This temporal progression from alkaline through transitional to calc-alkaline volcanism is accompanied by a systematic increase in the degree of silica saturation and decrease in Fe/Si, Nb/Y, and P/Y ratios. Klutlan lavas have lower Nb/Y and P/Y ratios and are characterized by an opposite eruption sequence. The earliest Klutlan lavas (16–13 Ma) erupted from a composite volcano and include calc-alkaline andesite, rhyolite, and hybrid trachyandesite lavas, followed by transitional basaltic trachyandesites, trachyandesites, trachytes, and rhyolites. Klutlan vulcanism between 13 and 11 Ma was dominated by basaltic fissure eruptions on the southern flanks of the earlier centre and include early mildly alkaline basalts followed by more voluminous transitional basalts. Volcanism reverted to a more central type of activity between 11 and 10 Ma and includes calc-alkaline dacite lava followed by transitional basaltic trachyandesite, trachyandesite, and trachyte lavas.The volcanic stratigraphy of the St. Clare Creek field and 40Ar/39Ar geochronological data provide the basis for understanding the origin of St. Clare magmas in a regional tectonic context. Early Wolverine alkaline volcanism largely reflects leaky transform faulting, whereas subsequent transitional and calc-alkaline lavas record the onset of subduction-related volcanism at the margins of the then active Wrangell arc. The opposite eruption sequence at the Klutlan centre records the demise of subduction-related volcanism between 16 and 13 Ma, due to northwestward migration of the subducted plate. Upwelling of asthenospheric mantle in place of the subducted slab led to the generation of transitional basalts between 13 and 11 Ma, which resulted in more evolved lavas between 11 and 10 Ma.
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Sottili, Leandro, Laura Guidorzi, Alessandro Lo Giudice, Anna Mazzinghi, Chiara Ruberto, Lisa Castelli, Caroline Czelusniak, et al. "Macro X-ray fluorescence analysis of XVI-XVII century Italian paintings and preliminary test for developing a combined fluorescence apparatus with digital radiography." ACTA IMEKO 11, no. 1 (March 31, 2022): 8. http://dx.doi.org/10.21014/acta_imeko.v11i1.1088.
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Using portable instruments for the preservation of artworks in heritage science is more and more common. Among the techniques, Macro X-Ray Fluorescence (MA-XRF) and digital radiography (DR) play a key-role in the field, therefore a number of MA-XRF scanners and radiographic apparatuses have been developed for this scope. Recently, the INFN-CHNet group, the network of the INFN devoted to cultural heritage, has developed a MA-XRF scanner for in-situ analyses. The instrument is fully operative, and it has already been employed in museums, conservation centres and out-door fields. In the present paper, the MA-XRF analysis conducted with the instrument on four Italian artworks undertaking conservation treatments at the conservation centre CCR “La Venaria Reale” are presented. Results on the preliminary test to combine DR with MA-XRF in a single apparatus are also shown.
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Fournier, Édith. "«J’ai accouché de ma mère»." Santé mentale au Québec 7, no. 2 (June 12, 2006): 5–18. http://dx.doi.org/10.7202/030134ar.
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Résumé Ce récit relate la mort d'une femme et les émotions de sa fille au cours des différentes étapes qu'elles ont eues à traverser. C'est l'histoire d'une série de métamorphoses de la relation mère-fille à partir de l'apparition des premiers symptômes d'une artério-sclérose cérébrale sévère. On y relate les conflits que font surgir successivement le placement dans une maison pour personnes âgées puis, dans un centre hospitalier pour malades à long terme. Commence alors la lente démarche de réconciliation entre mère et fille, et l'expérience d'une mort qui a été apprivoisée jusque dans le détail du rite funéraire.
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Emeleus, C. H., and V. R. Troll. "The Rum Igneous Centre, Scotland." Mineralogical Magazine 78, no. 4 (August 2014): 805–39. http://dx.doi.org/10.1180/minmag.2014.078.4.04.
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AbstractThe publication of the British Geological Survey memoir on Rum and the Small Isles in 1997 was followed by a period of intense petrological and mineralogical research, leading to some 40 papers, books and other publications. The research progress since then is reviewed here and integrated with the information previously available to provide an overview of the current status of understanding of the centre. New data on the acidic and mixed acid/basic magmas of the early Rum caldera demonstrate that frequent mafic replenishments were the main driver for magmatic activity at Rum right from its initial stages. The caldera is bound by the Main Ring Fault, a structure which probably also exercised an influence on the emplacement of the subsequent basic and ultrabasic intrusions. The later emplacement of gabbros and ultrabasic rocks caused only limited thermal metamorphism of the surrounding Torridonian sandstones, contrasting markedly with the crustal isotope signatures of the early intracaldera ignimbrite magmas and the intense alteration of uplifted masses of Lewisian gneiss within the ring fault. Rare picritic dykes provide an indication of the possible parent magma for the mafic and ultrabasic rocks, but these, as with most other magmatic rocks on Rum, have undergone varying degrees of crustal contamination, involving both Lewisian granulite and amphibolite-type crust but, notably, no Moine metasedimentary compositions as is the case at the nearby Ardnamurchan centre. Detailed textural studies on the gabbroic and ultrabasic rocks allow a distinction between intrusive peridotites and peridotite that forms part of the classic layered cumulate units of Rum and, furthermore, this work and that on the chromite seams and veins in these rocks shows that movement of trapped magma and magma derived from later intrusions, may produce textures regarded previously as of primary cumulate origin. Sulfides in the chromitite seams and ultrabasic rocks, in turn, show possible influences from assimilated Mesozoic sediments. Igneous activity on Rum was short-lived, possibly only between 0.5 and 1 m.y. in duration and commenced at ∼60.5 Ma. The Rum Central Complex was extinct by the time the main activity at the nearby Skye Central Complex commenced (∼59 Ma). From recent apatite fission-track studies it seems probable that Rum, in common with other Palaeogene centres, underwent a brief, but significantly later heating event (∼45 Ma).
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Kuczera, Piotr, Dorota Ciaston-Mogilska, Barbara Oslizlo, Anna Hycki, Andrzej Wiecek, and Marcin Adamczak. "The Prevalence of Metabolic Acidosis in Patients with Different Stages of Chronic Kidney Disease: Single-Centre Study." Kidney and Blood Pressure Research 45, no. 6 (2020): 863–72. http://dx.doi.org/10.1159/000508980.
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<b><i>Background:</i></b> Metabolic acidosis (MA) is one of the most common consequences of CKD. MA is also a risk factor of CKD progression and increased mortality in these patients. <b><i>Aim:</i></b> The aim of this retrospective, cross-sectional study was to assess the prevalence of MA in different stages of CKD and renal replacement therapy (RRT) modalities – haemodialysis (HD) and peritoneal dialysis (PD). Additionally, the relationship between the prevalence of MA and aetiology of kidney disease was analysed. <b><i>Methods:</i></b> One thousand five patients in different stages of CKD, or modalities of RRT were enrolled into this single-centre cross-sectional study. Forty-one patients were ruled out because of oral bicarbonate supplementation. In the remaining 964 patients (698 CKD stages 1–5, 226 HD, 40 PD), venous blood HCO<sub>3</sub><sup>−</sup> concentration, as well as serum Cr and urea concentrations were assessed. MA was diagnosed when blood HCO<sub>3</sub><sup>−</sup> concentration was below 22 mmol/L. <b><i>Results:</i></b> The prevalence of MA increased among all stages of CKD. Patients on HD had lower prevalence of MA in comparison with CKD 5 patients with no RRT (38.5 vs. 56.0%; <i>p</i> = 0.02) In PD patients, the prevalence of MA was significantly lower than in HD patients (2.5 vs. 38.5%; <i>p</i> < 0.001). In the whole study group, there were no significant differences in the prevalence of MA between different aetiologies of CKD (glomerulonephritis 24%, hypertension 23%, diabetes 25%, and tubule-interstitial diseases 24%). Also, when only patients in stages CKD 3–5 were compared, no significant differences in the prevalence of acidosis were found (glomerulonephritis 28%, hypertension 22%, diabetes 24%, and tubule-interstitial 21%). <b><i>Conclusions:</i></b> (1) MA is more frequent in patients with more advanced stages of CKD. (2) RRT reduces the prevalence of MA. (3) In PD patients, MA is rare. (4) Aetiology of CKD seems not to have a significant impact on MA prevalence.
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Barunčić Pletikosić, Julija, and Željka Križe. "Educational Activities of the Croatian Memorial Documentation Centre of the Homeland War." Moderna arhivistika 2022 (5), no. 2 (October 2022): 315–25. http://dx.doi.org/10.54356/ma/2022/qual7323.
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Croatian Memorial Documentation Centre of the Homeland War is a specialized archives and a scientific institution with the mission to collect, arrange, safekeep, professionally and scientifically research and publish archival records from the Homeland War. Apart from these main tasks, the Centre also engages in educational activities by organizing and providing lectures for elementary school, high school, university students and history teachers or by the engagement of its employees at the universities. Speakers will present these activities by giving examples of various types of lectures and describing methodology and contents. The authors present the theory of archival pedagogy and its development in Croatia, as well as examples of good practice in the Croatian archives. In Croatia, in the last couple of years, special attention has been given to archival pedagogy as a potential for the development of archival activities and the modernization of the archives. The Croatian Archival Society has an important role in promoting archival pedagogy and it encourages archivists to participate in educational activities. The authors will present educational activities organized by the Croatian Memorial Documentation Centre of the Homeland War. The Centre aims to follow modern trends in archive pedagogy and education by combining its two main activities - archival practice and scientific research. Special emphasis is given to the use of various categories of the Centre’s archival materials, such as official records, printed material, audio recordings, photographic material, maps, etc. in the lectures. Besides paper records, the Centre has a large collection of digitalized documents which are particularly useful and convenient to use in the lectures. The materials from the Collection of photographs and the Collection of video materials are most frequently used. Dealing with the original archival material, especially when it comes to photographs or video materials, students get the most precise frame of the past on the basis of which they then best develop their own critical thinking. In this way, archival practice illustrates the educational role of archives. Authors also deal with the question how and to what extent does the use of archival materials affect the students' understanding of the topic and inspires them to visit archives and to do their own research which also contributes to the popularization of archives and archival science.
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Finch, A. A., K. M. Goodenough, H. M. Salmon, and T. Andersen. "The petrology and petrogenesis of the North Motzfeldt Centre, Gardar Province, South Greenland." Mineralogical Magazine 65, no. 6 (December 2001): 759–74. http://dx.doi.org/10.1180/0026461016560007.
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AbstractNorth Motzfeldt is an intrusive igneous centre within the Igaliku (formerly spelt Igaliko) complex, Gardar Province, South Greenland. A detailed field description of the centre is given, with preliminary geochemical and isotopic data. The North Motzfeldt centre is intruded into Ketilidian granitoid basement rocks, and current exposure retains parts of the original roof against earlier Gardar eruptives and clastic sediments of the Eriksfjord formation. The unconformity between the Ketilidian and the overlying Eriksfjord is believed to have been crucial in the siting of the centre. The centre is subdivided into two major units, NM1 and NM2. This was followed by significant peralkaline nepheline microsyenite in sheets, characterized by rare element-rich accessory minerals including rinkite-mł sandrite, pyrochlore and låvenite. A significant microsyenite body is called NM3. A preliminary Rb-Sr isochron of 1226±27 Ma indicates a far younger age for the centre than previously thought (~;1350 Ma). Cross-cutting relationships between North Motzfeldt and rocks of the adjacent Motzfeldt centre require a reappraisal of the chronology of Motzfeldt magmatism. We suggest that rocks previously believed to comprise the Motzfeldt centre represent the products of multiple phases of magmatism from Early- to Mid-Gardar times.
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Spray, John G., and Gregory R. Dunning. "A U/Pb age for the Shetland Islands oceanic fragment, Scottish Caledonides: evidence from anatectic plagiogranites in ‘layer 3’ shear zones." Geological Magazine 128, no. 6 (November 1991): 667–71. http://dx.doi.org/10.1017/s0016756800019762.
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AbstractHigh precision U/Pb data obtained from zircons extracted from plagiogranite within the gabbro unit of the Shetland Islands oceanic fragment of northeast Scotland yield an age of 492 ± 3 Ma. Field relations indicate that the plagiogranites were generated by the partial melting of amphibolitized gabbros within high-temperature shear zones formed due to crustal deformation and fluid infiltration occurring in proximity to a spreading centre. The U/Pb data therefore constrain the crystallization age of the Shetland complex. This age is similar to U/Pb ages obtained from the Leka (497±2 Ma), Karmoy (493+7-4 Ma) and Gulfjellet (489±3 Ma) oceanic fragments of the Norwegian Caledonides, and the Pipestone Pond (4943-2 Ma) and Betts Cove (4893-2 Ma) oceanic fragments of the Canadian Appalachians.
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Sigl, Martin, Tanja Noe, Gerhard Ruemenapf, Bernhard K. Kraemer, Stephan Morbach, Martin Borggrefe, and Klaus Amendt. "Outcomes of severe limb ischemia with tissue loss and impact of revascularization in haemodialysis patients with wound, ischemia, and foot infection (WIfI) stage 3 or 4." Vasa 49, no. 1 (January 1, 2020): 63–71. http://dx.doi.org/10.1024/0301-1526/a000819.
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Summary. Background: With growing prevalence, end-stage renal disease (ESRD) as well as critical limb ischemia (CLI) are both conditions associated with high morbidity and mortality rates. Patients and methods: A retrospective single-centre study provided data of a German interdisciplinary vascular centre. Seventy-seven consecutive haemodialysis (HD) inpatients (median age, 73.6 years) with 91 threatened limbs with Wound, Ischemia, and foot Infection (WIfI) clinical stage 3 or 4 were evaluated for in-hospital treatment of peripheral arterial disease, limb salvage rates, major amputation (MA)-free and overall survival. Results: The 1-year MA-free limb salvage rate was 82 %. On multivariate analysis, a higher WIfI clinical stage (hazard ratio [HR], 7.54; p = 0.008) indicated a higher risk of MA, while at least one-vessel run-off to the foot after revascularization of any kind was associated with a lower risk of MA (HR, 0.17; p = 0.001). In the composite endpoint analysis, the 1-year MA-free overall survival rate was 65 %. Patients with limbs in WIfI clinical stage 4 versus stage 3 carried a more than two-fold increased hazard of death or MA (HR, 2.63; p = 0.028), while revascularization was associated with reduced risk (HR, 0.40; p = 0.021). One-year overall survival (78 %) was not associated with WIfI stage or revascularization but was worse in patients with previous symptomatic coronary artery disease (HR, 3.25; p = 0.039). During long-term follow-up over 12 years, MA-free survival probability was significantly lower in the WIfI stage 4 versus WIfI stage 3 group (HR, 1.58; p = 0.048) without significant differences in overall survival (HR, 1.10; p = 0.696). Conclusions: Lower-extremity CLI with tissue loss in HD patients is associated with high morbidity and mortality rates. WIfI clinical stage was predictive of 1-year MA-free survival, while revascularization significantly reduced MA risk but did not influence overall survival.
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Wang, Si-Bo, Kang-Ding Liu, Yi Yang, Ya-Jie Li, Ming-Yi Hu, Pan Lin, Rong Guo, et al. "Prevalence and extent of right-to-left shunt on contrast-enhanced transcranial Doppler in Chinese patients with migraine in a multicentre case-control study." Cephalalgia 38, no. 4 (May 5, 2017): 690–96. http://dx.doi.org/10.1177/0333102417708203.
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Background The association between RLS and migraine is still debated. The aim of this study is to investigate the prevalence and grade of RLS in Chinese patients with migraine and to evaluate the relationship between RLS and migraine. Methods A multi-center case-control study of contrast-enhanced transcranial Doppler was conducted in 931 consecutive patients with migraine (240 of 931 had migraine with aura and 691 of 931 were in the migraine without aura group) and 282 were healthy adults. Clinical trial no. NCT02425696. Results The prevalence of RLS was 63.8% and 39.9% in the migraine with aura group (MA+) and migraine without aura group (MA−), respectively, significantly higher than that of the healthy group (29.4%, p < 0.001; p < 0.001). The positive rate of large RLS in the MA+ group and MA− group was 32.1% and 16.5%, respectively, significantly higher than healthy group (6.4%, p < 0.001; p < 0.001). There was no difference among groups in terms of positive rate of permanent RLS ( p = 0.704). Conclusion This multi-centre case-control study suggested that there is an association between RLS and migraine with and without aura, especially when the shunt is large.
Dissertations / Theses on the topic "Centre of ma"
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許秀玲 and Sau-ling Emilie Hui. "Civic centre in Ma On Shan." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31983340.
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Hui, Sau-ling Emilie. "Civic centre in Ma On Shan." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25955469.
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Wong, Wai-lam William, and 黃偉霖. "Ma On Shan Community Centre and Library." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31985543.
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Wong, Wai-lam William. "Ma On Shan Community Centre and Library." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25945555.
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Peyrusaubes, Daniel. ""Ma part de nuage" : climat et société en Imerina centre-oriental (Madagascar)." Poitiers, 2006. http://www.theses.fr/2006POIT5004.
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La relation entre l'homme et le climat est une histoire très ancienne. Dans le temps et dans l'espace, les sociétés doivent composer avec les faits atmosphériques. Le contexte de changement climatique, avéré ou pas, donne une nouvelle impulsion à cette thématique. Il donne, en particulier, l'occasion d'interroger un champ de recherche plutôt confidentiel en géoclimatologie, celui de la perception et du vécu du climat par les populations. Ce travail explore cette orientation de recherche sur les Hautes Terres de Madagascar, en pays merina. Il s'agit, dans un premier temps, de définir une saisonnalité climatique à partir de l'analyse diachronique de paramètres météorologiques (températures, précipitations, vents, humidité, index de Showalter, eau précipitable). L'approche est bidimensionnelle, puisqu'elle compile une étude de surface mais aussi d'altitude, grâce à des données de radiosondages. L'examen de types de temps caractéristiques des lieux établit une transition avec le second moment de cette recherche. L'accent est porté sur les rapports qu'entretiennent les communautés rurales du secteur d'études avec le temps qu'il fait. Sur la base d'entretiens réalisés in situ, tout un corpus relevant de fines connaissance individuelles et collectives, de pragmatisme paysan face aux vicissitudes météoroclimatiques, de pratiques culturelles originales, est donné à la lecture. La confrontation entre savoirs savants et savoirs vernaculaires donne des résultats intéressants, dans la mesure où les seconds viennent parfois compléter avec pertinence les lacunes des premiers. De la culture des champs (de riz) à une culture météoroclimatique, telle est la dimension finale donnée à ce travailThe relation between man and climate is a very old story. Human communities have always had to compromise with atmospheric facts. The climatic change context, whether it is recognized or not, gives a fresh impetus to this line of research. It offers, in particular, an opportunity to investigate a field which up to now has not obtained much attention in geoclimatology, i. E. The way in which communities perceive and ajust to climate. The present work explores this subject in the Highlands of Madagascar, in Merina country. It starts out with an attempt to establish a climatic seasonality based on the diachronic analysis of such weather parameters as temperatures, precipitations, winds, humidity, Showalter index, and precipitable water. This approach is bidimensional, since it compiles a study of both surface and altitude, using radiosonde explorations data. The examination of some characteristic weather types ushers in the second part of this work, which focuses on the relations between weather and the rural communities of the area under consideration. On the basis of interviews carried out in situ, a whole corpus of local knowledge is presented to reader, which compounds individual and collective experience in handling meteoroclimatic vicissitudes and original cultural practice. Confronting erudite knowledge with vernacular knowledge produces interesting results, insofar as the latter may at timpes supplement what the former has overlooked. From the culture of the rice field to a meteoroclimatic culture, such is the span of this work
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Tam, Wai-kee, and 譚偉基. "Breakthrough: Tech. Centre II." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31983637.
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Cheung, Sai Sing. "Comparing the arbitration power between Hong Kong International Arbitration Centre and the Estate Agents Authority." access abstract and table of contents access full-text, 2008. http://libweb.cityu.edu.hk/cgi-bin/ezdb/dissert.pl?ma-slw-b22724412a.pdf.
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Thesis (M.A.)--City University of Hong Kong, 2008.Title from PDF t.p. (viewed on Oct. 3, 2008) "Master of Arts in arbitration and dispute resolution" Includes bibliographical references (p. 106-107)
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Chan, Chun-kei Barry, and 陳俊基. "Communal event centre for the neighbourhood." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31985014.
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Verstaevel, Matthieu. "Amélioration hydro-mécanique d'une couverture de centre de surface de stockage de déchets radioactifs FA et MA à vie courte." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAU015/document.
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La présente étude concerne le Centre de Stockage de la Manche (CSM), ce centre dédié aux déchets faiblement etmoyennement actifs à vie courte l’un des sites précurseurs au niveau international. La recherche proposée dans lecadre de la présente thèse CIFRE se concentre sur l’étude hydraulique des matériaux de couverture du site, et surleur amélioration hydromécanique. Il s’agit donc de renforcer leur imperméabilité afin que cette couche puisse jouerun rôle de barrière minérale. Une contrainte imposée par l’Andra était de considérer la validité du réemploi dumatériau en place au moyen d’un traitement par adjuvant. Ce matériau est un limon sableux, donc un matériaucomportant déjà une part de fines non négligeable. S’il existe dans la littérature de nombreuses études surl’amélioration mécanique des matériaux fins (applications aux infrastructures routières) et sur le traitement dematériaux pulvérulents par ajout d’une fraction fine (constitution de barrières étanches), il existe très peu d’études surle renforcement de l’imperméabilité de sols fins. Une campagne d’essais physiques sur les matériaux traités à labentonite a été réalisée à différents taux de traitement. Les résultats ont montré que l’ajout d’adjuvant entraine unediminution de leur poids volumique sec optimum pour une énergie de compactage Proctor normal et uneaugmentation de leur teneur en eau optimum. En complément, la sensibilité à l’érosion, interne ou externe, observéependant les essais à l’oedoperméamètre, a été vérifiée à partir de différents critères de stabilité disponibles dans lalittérature. A la différence du traitement d’un sol pour remblais routiers, on ne recherche pas une résistancemécanique accrue mais une flexibilité du matériau. On observe effectivement que le traitement n’augmente pas larigidité du matériau. La conductivité hydraulique des matériaux non traités et traités a été mesurée. Cette étude a étémenée à partir de plusieurs dispositifs (oedoperméamètre, perméamètres à parois rigides et à parois souples).L’influence du taux de traitement du matériau sur la diminution de la conductivité hydraulique a pu être observée.Quatre planches d’essais instrumentées ont été réalisées, elles devraient rester en fonction plusieurs années. Lesmesures de conductivité hydraulique initiales sur les planches d’essais ont montré que les résultats étaientconformes à ceux obtenus au laboratoire. Ces planches d’essais, permettront de suivre l’évolution éventuelle desperformances du traitement. La poursuite de leur suivi apparait être cruciale pour la validation du traitement avant samise en oeuvre à grande échelle sur toute la couverture du CSMThis study related to the Manche storage center (CSM), one of the first landfill in the world dedicated to low andintermediate radioactive waste short-live time. The researches considered in this thesis supported by industrialcompanies, focus on the hydraulic study of cap cover materials of the site, and their hydromechanical improvement.The aim is to improve their impermeability in order to be substituted to the geomembrane as cap cover liner. Aspecification imposed by Andra was to consider a solution of the re-use of the in situ material by adding of additive.The initial material is a sandy silt, a material with a significant proportion of fines. In the literature there are manystudies on the mechanical improvement of fine materials (applications to road infrastructure) and the treatment ofsandy materials by adding a fine fraction (constitution of waterproof barriers). On the other hand there are very fewstudies on the impermeability improvement of fine soils. A physical tests campaign on treated materials withbentonite was carried out at various treatment rates. The results showed that the addition of additive induces adecrease in optimum dry unit weight for a normal Proctor compaction energy and increases their optimum watercontent. In addition, the susceptibility to erosion, internal or external, observed during oedopermeameter test wasassessed from various stability criteria available in the literature. Unlike the treatment of soil for road embankments,the increase of the material stiffness is not wanted and flexibility is preferred what is observed with the treatmenttested. The comparative hydraulic conductivity of the untreated and treated materials were measured. In this studydifferent devices (oedopermeametere, permeameters, triaxials device) were used. The influence of the treatment rateof the material on the decrease of the hydraulic conductivity was observed. Four large scale experimentations weredesigned; they should be monitored for several years. The initial hydraulic conductivity measurements on siteshowed that the results were compatible with those obtained in the laboratory tests. These large scaleexperimentations will demonstrate the possible evolution of the material improvement. The monitoring of this siteexperimentation is a preliminary test require before the application of the selected treatment on the cap cover of theCSM
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Chaves, César Roberto Castro. "EDUCAÇÃO PATRIMONIAL NO BAIRRO DO DESTERRO: Estudos sobre os projetos de patrimonialização no Centro Histórico de São Luís - MA." Universidade Federal do Maranhão, 2012. http://tedebc.ufma.br:8080/jspui/handle/tede/30.
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Previous issue date: 2012-12-20FUNDAÇÃO DE AMPARO À PESQUISA E AO DESENVOLVIMENTO CIENTIFICO E TECNOLÓGICO DO MARANHÃO
Il s'agit d'une enquête sur les programmes sociaux d'éducation au patrimoine dans le quartier du Desterro, de discuter et de réfléchir sur quelques aspects qui semblent caractériser la rhétorique de la patrimonialisation à São Luís - MA. Dans la quête de la compréhension de la logique préservationniste lieu au milieu des conflits et des confrontations par cas préservation sociale et orgue défavorisés, ce travail a soutenu la théorie des études culturelles, visant à comprendre et à discuter de la nature des affrontements, les conflits et impératifs de gestion d'actifs dans le centre historique de Saint-Louis, en particulier par le fait que le quartier de l'exil, caractérisé par l'utilisation dominante résidentielle. Nous sommes conscients que, à partir des données obtenues à partir de la recherche, de la réalité locale révèle un cadre socio-culturel dans lequel les politiques du patrimoine public ont été guidés par participatif peu pratique et démocratique. Il y a eu un manque de médiations de points chauds - comme en l'absence d'avis de la culture et du patrimoine - entre les secteurs gouvernementaux et communautaires, l'appel vigueur discursive aux grands récits du patrimoine historique. Ces récits ont servi à cacher les différents conflits, pour adorer le monument de pierre et de chaux, de parti pris élitiste au détriment des usages sociaux de la propriété, c'est à dire, des représentations, des temporalités et des besoins immédiats des personnes qui vivent ou faire une sorte de utilisation quotidienne du centre historique de São Luís - MA.
Trata-se de uma pesquisa social sobre os programas de educação patrimonial no bairro do Desterro, de modo a discutir e refletir sobre alguns aspectos que parecem caracterizar a retórica da patrimonialização em São Luís - MA. Na busca pela compreensão da lógica preservacionista local, em meio a conflitos e enfrentamentos por parte de instâncias sociais menos favorecidas e órgãos de preservação, esse trabalho, apoiado nos teóricos dos Estudos Culturais, teve como objetivo perceber e discutir a natureza dos enfrentamentos, conflitos e imperativos na gestão patrimonial do centro histórico de São Luís, especialmente pela circunstância do bairro do Desterro, caracterizar-se pelo uso predominantemente residencial. Percebemos que, a partir dos dados obtidos com a pesquisa, a realidade local revela um quadro sócio-cultural no qual as políticas públicas de patrimônio têm sido pautadas em práticas pouco participativas e democráticas. Constata-se a ausência de instâncias mediadoras dos pontos de conflito - como na inexistência de conselhos de cultura e de patrimônio -, entre setores comunitários e poder público, prevalecendo o apelo às grandes narrativas discursivas do patrimônio histórico. Tais narrativas têm servido para ocultar os diversos conflitos, ao cultuar o monumento de pedra e cal, de viés elitista, em detrimento dos usos sociais do patrimônio, ou seja, das representações, temporalidades e necessidades imediatas das pessoas que moram ou fazem algum tipo de uso cotidiano do centro histórico de São Luís - MA.
Books on the topic "Centre of ma"
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Cômes, Jean-Pierre. " Ma" guerre d'Algérie et la torture: J'étais lieutenant dans les D.O.P. Paris: Harmattan, 2002.
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Gleeson, Libby. Ma ma qu shang ban. Tai bei shi: Wei jing guo ji gu fen you xian gong si, 2017.
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Stockford, Lawrence. Consumer vs user centred design: MA Industrial Design 2000. London: Central Saint Martins College of Art & Design, 2000.
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Polut £ma. Moskva: AST, 2001.
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Tulku, Tarthang. Annals of the Tibetan Nyingma Meditation Center. Berkeley, Calif: Dharma Pub., 1998.
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1921-, Szigeti József, ed. Marx--ma: Tudományos ülésszak. Budapest: Szigeti J., 1993.
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Bstan-ʼdzin-rgya-mtsho. Dbu ma ́i lam. Dharamsala: Dus bab gsar khaṅ, 1997.
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Riou, Patrick. Ma vie à la Crim'. Paris: Jacob-Duvernet, 2011.
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Jane, Austen. Ai ma. Wu han: Chang jiang wen yi chu ban she, 2008.
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Jane, Austen. Ai ma. Nan jing: Yi lin chu ban she, 2001.
Find full textBook chapters on the topic "Centre of ma"
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Rydberg Sterner, Therese, Greta Häggblom-Kronlöf, and Pia Gudmundsson. "The AgeCap Conceptual Framework for Research on Capability in Ageing." In International Perspectives on Aging, 9–17. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-78063-0_2.
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AbstractThe overall goal of AgeCap is to contribute to increased wellbeing and participation in life for the older population. While there are several ways to meet this challenge, AgeCap has chosen the capability approach, which focuses on a subjective perceived health- and ability-related perspective, rather than on disease or disabilities. The understanding of capability used within the centre is based on the work of the philosopher and economist Amartya Sen, described as the individual’s ability to perform actions in order to reach goals he or she has reason to value (Sen A. The idea of justice. Belknap Press of Harvard University Press, Cambridge, MA, 2009). The capability approach focuses on what people are able to do and to be – their capabilities – and on their freedom of choice to perform those actions. AgeCap’s multidisciplinary setting was an opportunity to adopt the capability approach within its research. Nevertheless, it also created challenges in establishing a common view of what capability is, and how to apply the concept in collaborations across several different research fields. Thus, at an early stage during the setting up of the Centre, it was decided that a conceptual framework aiming to capture a shared view of capability in ageing should be developed. In addition, in order to facilitate the application of the capability approach within the research setting and make it more accessible to different target groups within society, it was later proposed that a graphic illustration of the AgeCap framework of capability should be created. This chapter describes the conceptual framework and graphic illustration that were developed by the Communication Group in collaboration with the Steering Committee, Principal Investigators, other researchers within AgeCap and the company Explain Artist. Central concepts include available resources, conversion factors, capability set, freedom of choice, goals of value and justice. The purpose of the conceptual framework is mainly to serve as a platform for researchers to use in any way they find relevant from their own perspective. Furthermore, the graphic illustration was developed in order to facilitate the application of the capability approach within AgeCap and make our research more accessible to society in order to dismantle the wall between researchers, older people and the general public.
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Billington, Josie. "Primary Sources and the MA Student." In Teaching Nineteenth-Century Fiction, 210–22. London: Palgrave Macmillan UK, 2010. http://dx.doi.org/10.1057/9780230281264_14.
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Karsch, H. "Reactions at a Group Ma Metal Center (Excluding Ra)." In Inorganic Reactions and Methods, 131–33. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145296.ch122.
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Caro, Diego. "Hidden music scenes: governmentality and contestation in postcolonial Hong Kong." In Embodying Peripheries, 240–56. Florence: Firenze University Press, 2022. http://dx.doi.org/10.36253/978-88-5518-661-2.11.
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Floor 26 of Ho King Commercial Centre in Yau Ma Tei, the elevator stops. At the end of the corridor, the sound of a heavy metal band, detuned screams buffered by the cracked plywood door of a tiny music studio. Outdated factory buildings in Kwun Tong, industrial architecture gradually surrounded by new commercial and residential complexes; their precarious wait for urban renewal has offered an opportunity for young musicians to establish music studios, classrooms, or improvised bedrooms where music and teenage discoveries mingle with the noise of machinery. A rusty anonymous intercom partially hidden by some plastic ivies. Past the door, a narrow metallic staircase, source of random encounters and only access point to a one-off experience; hundreds of people—local and foreigners—gathered in a tiny dark room, a miscellany of sweat, smoke, voices, and distant music. The hidden networks formed by musicians scattered in unexpected venues around Hong Kong provide a sonic collage that reformulates some of the city’s social peripheries from within. Through emergent sub-cultures, young artists deploy a wide range of tactics to counter the commodification and politicization of creativity, and the speculation over space in order to achieve new opportunities in a “bureaucratic society of controlled consumption.” In his work on everyday life, which focuses on the resistance of (extra)ordinary people to structures of power, Michel de Certeau makes reference to the idea of “silent discoverers of their own paths in the jungle of functionalist rationality.” The main actors of this essay, despite feeding on and actively participating in Hong Kong’s consumerism dynamics by taking references from social media, e-commerce, or shopping malls, produce “wandering lines”—or wandering sounds—with their own (syn)tactics through their artistic practices. Notably, in Hong Kong’s reductionist bureaucratic system, with a strong predominance of statistics and evaluation focused on “classifying, calculating and putting into tables,” these artistic rituals and reinterpretations of the city’s culture often remain overlooked or hidden to the system.
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Luiz, Jade W. "A Quiet House: An Introduction." In Archaeology of a Brothel in Nineteenth-Century Boston, MA, 1–29. London: Routledge, 2022. http://dx.doi.org/10.4324/9781003194330-1.
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Luiz, Jade W. "The “Social Evil” in the City On a Hill: Boston, Massachusetts, and Prostitution in the Nineteenth Century." In Archaeology of a Brothel in Nineteenth-Century Boston, MA, 30–49. London: Routledge, 2022. http://dx.doi.org/10.4324/9781003194330-2.
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Luiz, Jade W. "“The Common Enemy of the Family”: Sex Work and the Inversion of the Nineteenth-Century Family." In Archaeology of a Brothel in Nineteenth-Century Boston, MA, 72–88. London: Routledge, 2022. http://dx.doi.org/10.4324/9781003194330-4.
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Luiz, Jade W. "Finely Dressed and Very Accomplished: Identity, Sexuality, and Race in Nineteenth-Century Sex Work." In Archaeology of a Brothel in Nineteenth-Century Boston, MA, 50–71. London: Routledge, 2022. http://dx.doi.org/10.4324/9781003194330-3.
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Luiz, Jade W. "Cultivated Bodies, Cultivated Spaces: Control, Manipulation, and Violence in Nineteenth-Century Sex Work." In Archaeology of a Brothel in Nineteenth-Century Boston, MA, 110–29. London: Routledge, 2022. http://dx.doi.org/10.4324/9781003194330-6.
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Luiz, Jade W. "“It Is the Devil's Business”: Acceptable Labor, Clandestine Labor, and Sex Work." In Archaeology of a Brothel in Nineteenth-Century Boston, MA, 89–109. London: Routledge, 2022. http://dx.doi.org/10.4324/9781003194330-5.
Full textConference papers on the topic "Centre of ma"
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Su, Z., R. S. Grant, G. T. Kennedy, W. Sibbett, and J. S. Aitchison. "Mode Locking using the Half-Bandgap Nonlinearity in Passive AIGaAs Waveguides." In Nonlinear Guided-Wave Phenomena. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/nlgwp.1993.ma.3.
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Passive AlGaAs waveguides have been shown to be suitable for ultrafast all-optical switching when used at wavelengths in the vicinity of the half-bandgap (around 1.5-1.7 μm).1,2 Nonlinear phase shifts in excess of π radians have also been observed directly by monitoring self-phase modulation induced spectral broadening of pulses propagating through straight waveguides.3,4 These large phase shifts, caused by nonresonant nonlinear index changes, are possible due to the combination of low nonlinear absorption, coupled with a localised enhancement related to the two-photon band edge.5 In addition, semiconductor waveguides are, in general, polarisation preserving. Taken together, these attributes make passive AlGaAs waveguides attractive alternatives for optical fibres in coupled-cavity lasers operating at wavelengths around 1.5 μm. In this paper, we describe the application of passive AlGaAs waveguides as the nonlinear element in a coupled-cavity KCl:TI colour-centre laser to produce pulses of less than 170 fs in duration. The principal advantage of using semiconductor waveguides over silica-based optical fibres is their low power requirement which offers considerable potential for miniaturisation.
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Alexandrescu, Laurentia, Mihai Georgescu, Maria Sönmez, Anton Ficai, Roxana Trusca, and Ioana Lavinia Ardelean. "Polyamide/Polyethylene/Carbon Fibre Polymer Nanocomposites." In The 9th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2022. http://dx.doi.org/10.24264/icams-2022.i.2.
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Polyamide and polyethylene are well known as engineering thermoplastic materials that are widely used in industrial applications for their good mechanical and thermal properties. The paper presents the study of the new nanostructured polymer composites based on polyamide/ compatibilizers/polyethylene/carbon fibres nanoparticles-PA/PE-g-MA/PE/CF in order to obtain, by injection, centre pivot liner, centre plates, and other components for the railway industry, with impact resistance higher than 5-8 kJ/m², abrasion resistance below 100 mm3, resistance to temperatures of -40 - 240°C, resistance to impact and to outdoor applications, with temperatures ranging from -40 to +60°C, in rain, snow or sunshine. The influence of carbon fibres nanoparticles (CF) on the rheological and physico-mechanical properties of the polyamide was studied. The nanocomposites based on polyamide/ compatibilizers/ polyethylene/carbon fibres nanoparticles were characterized by scanning electron microscopy (SEM) and Fourier transformation infrared spectrum (FT-IR) and in terms of physico-mechanical properties. The studied nanocomposites have higher values compared to the blank samples, and the requirements of the railway of impact strength of 5 KJ/m2. Carbon fiber concentrations greater than 1.5% result in decreases in impact strength values, similar to traction resistance values, but not lower than standard values. This leads to the conclusion that the percentages of carbon fibers in the range of 0.1-1.5% achieve maximum values of physical-mechanical parameters.
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Burgio, Gianluca, and Giovanna Acampa. "Paradigmi relazionali nello spazio urbano: il caso-studio del centro storico di Palermo." In International Conference Virtual City and Territory. Roma: Centre de Política de Sòl i Valoracions, 2014. http://dx.doi.org/10.5821/ctv.8031.
Full textAbstract:
In questo scritto analizzeremo le modalità attraverso le quali vengono sovvertite, con piccole
azioni dei cittadini, le regole che disciplinano gli spazi urbani. Partendo dal caso studio del
centro storico di Palermo illustreremo come la “conquista” anche temporanea, di strade e
piazze possa permettere una rivitalizzazione ed una rivalutazione dei luoghi.
Il nostro interesse è rivolto a comprendere come si siano sviluppati processi di ri-conquista dello
spazio urbano, che hanno permesso di “addomesticare” alcuni spazi della città, modificando usi
e configurazioni comuni, che estrapolati dal contesto abituale sono stati inseriti in nuove
relazioni.
La scelta di prendere Palermo come caso studio deriva da alcune caratteristiche di questa città:
la prima caratteristica può essere individuata nelle sue radici storico-culturali che in qualche
modo favoriscono l’insediamento di nuove comunità; l’altra caratteristica è che le forme di
scambio con abitanti di diverse culture avvengono, non in periferia, ma in centro. Questo rende
la città siciliana un caso non unico ma atipico nel panorama europeo, dove si tende ad avere
una spinta centrifuga e quindi una emarginazione delle popolazioni non locali e dei ceti meno
abbienti.
Da questo punto di vista il centro di Palermo può essere considerato come una sorta di spugna,
che riesce non solo ad assorbire nuove comunità ma anche ad attrarre esponenti del ceto
sociale medio. A differenza di altre città europee, dove si sono innescati processi di
gentrification grazie agli interventi strutturali promossi dalla pubblica amministrazione, a
Palermo il processo di riqualificazione è dovuto a piccole azioni promosse dai residenti.
L’inversione della tendenza degenerativa che era in atto e l’inversione dell’andamento dei
valori immobiliari non è dovuta quindi ad una politica integrata, quanto alla libera iniziativa delle
fasce sociali più deboli. In this script we’ll describe the everyday,little actions of the citizens that break the rules of the
urban areas’ organization.
Starting from the Old Town of Palermo, that we used as the example in our analysis, we’ll show
how the “conquest”, even just temporary, of streets and squares could achieve a revitalization
and a revaluation of quarters. Our focus is on understanding how revitalization/ re-conquest of urban areas has taken place.
By altering people preconcieved ideas of areas of the city, this process achived the
“domestication” of some areas that, out of their usual context, are inserted in new relations.
Our choice to take Palermo as example derives from some typical characteristics of this city: the
first one is due to its historical-cultural origins which, in some way, favor the settlement of new
comunities; the second is that the way of live among population of different cultures develops in
the centre of the city, not in the suburbs. These features make Palermo not unique, but atipical
compared to the rest of Europe where immigrants and lower-class people, are generally forced
to the external areas of towns.
From this point of view we can imagine Palermo’s Old town as a sponge which is able not just
to absorb new comunities, but also to attract people from the middle classes. In European cities
gentrification processes are started thanks to projects realized by the Public Administrations, On
the contrary in Palermo this process generates from actions of the inhabitants themselves.
The change of degenerative trend and the increasing value in the Real Estate Market is
therefore not caused by a political action, but thanks to the initiative of the lower class.
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Cerasoli, Mario, and Biancamaria Rizzo. "Il futuro tecnologico dei centri storici." In International Conference Virtual City and Territory. Roma: Centre de Política de Sòl i Valoracions, 2014. http://dx.doi.org/10.5821/ctv.7979.
Full textAbstract:
Parlare di recupero e valorizzazione dei centri storici può essere quanto mai attuale in un’epoca
in cui, forse per la prima volta, si mettono in discussione alcuni modelli insediativi e di sviluppo
volti prevalentemente alla espansione delle aree urbane. A cinquant’anni di distanza da quando
si è cominciato a parlare in modo organico di centri storici, in un periodo caratterizzato da una
delle più gravi crisi economiche globali dopo quella del 1929, com’è cambiato il rapporto tra le
città e i propri Centri Storici? Come sono visti i centri storici da chi li abita e da chi non li abita?
Quale può essere allora il ruolo potenziale delle nuove tecnologie per la tutela e la
valorizzazione dei Centri Storici? Le nuove tecnologie possono non solamente cambiare
significativamente la qualità di chi abita e vive nei centri storici ma anche aumentare la
competitività degli stessi, aumentando così la loro capacità di attrarre risorse umane e
finanziarie e favorendone lo sviluppo economico e socio-culturale. Tuttavia, come si coniuga il
valore della storia con le mutevoli esigenze della vita contemporanea? Quali le potenziali
applicazioni delle nuove tecnologie per il miglioramento della vita nei centri antichi? Il Centro
Storico costituisce un ambito territoriale estremamente delicato, con una precisa identità
urbanistica e un elevato valore storico e testimoniale riferibile sia al tessuto urbano, sia a
elementi del patrimonio edilizio di rilevante valore, sia ai suoi abitanti. Ma può in realtà rivelarsi
una risorsa importante in un progetto di trasformazione virtuosa dell'intera compagine urbana,
rafforzandone sia l'identità propria che la capacità di attrazione verso l'esterno. E le nuove
tecnologie in questo progetto possono assumere un ruolo determinante. Talk about recovery and valorisation of the historic centers can be as timely as ever at a time
when, perhaps for the first time, are put into question some settlement and development models
principally aimed to the expansion of urban areas. After fifty years since it been started talking
about in an organic way of historical centers, in a period characterized by one of the most
serious global economic crisis after the one of 1929, as the relationship between the city and its
historical centers has changed? As the historical centers are seen by those who live there and
those who do not live in them? Which then can be the potential role of new technologies for the
protection and valorisation of historical centers? The new technologies can not only significantly
change the quality whose inhabits and lives in the historic centers but also increase the
competitiveness of the same, thus increasing their ability to attract human and financial
resources and promoting the economic development and socio-cultural. However, how it
combines the value of history with the changing needs of contemporary life? What are the
potential applications of new technologies for the improvement of life in the ancient centers?
The historical center constitutes a territorial field extremely delicate, with a specific urban
identity and an high historical and testimonial value referable both to the urban texture, both to
elements the building heritage of significant value, both to its inhabitants. But it can actually
become an important resource in a virtuous transformation project of the whole urban structure,
strengthening both the its own identity that the attractiveness to the outside. And the new
technologies in this project can play a decisive role.
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Khorasanov, Georgy L., Anatoly P. Ivonov, and Anatoly I. Blokhin. "Neutronic and Physical Characteristics of an Accelerator Driven System with a Lead-208 Coolant." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89153.
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In the paper a possibility of using a lead isotope, pure Pb-208, as a coolant for a subcritical core of 80 MW thermal capacity of the PDS-XADS type facility is considered. Calculations of neutronic characteristics were performed using Monte Carlo technique. The following initial data were chosen: an annular core with a target, as a neutron source, at its centre; the core coolant — Pb-208 (100%); a fuel — a mix of mono nitrides of depleted uranium and power plutonium with a small share of neptunium and americium; the target coolant — a modified lead and bismuth eutectic, Pb-208(80%)-Bi(20%); proton beam energy — 600 MeV; effective multiplication factor of the core under operation — Keff = 0.97; thermal capacity of the core — N = 80 MW. From calculations performed it follows that in using Pb-208 as the core coolant the necessary intensity of the external source of neutrons to deliver 80 MW thermal capacity is equal to S = 2.29−1017 n/s that corresponds to proton beam current Ip = 2.8 mA and beam capacity Pp = 1.68 MW. In using natural lead instead of Pb-208 as the core coolant, effective multiplication factor of the core in normal operating regime falls down to the value equal to Keff = 0.95. In these conditions multiplication of external neutrons in the core and thermal capacity of the subcritical core are below nominal by 1.55 times. For achievement the rated core power N = 80 MW it is required on ∼20–30% to increase the fuel loading and volume of the core, or by 1.55 times to increase intensity of the external source of neutrons. In the last case, the required parameters of the neutron source and of the corresponding proton beam are following: intensity of the neutron source S = 3.55·1017 n/s., beam current Ip = 4.32 mA, beam capacity Pp = 2.59 MW. To exploit the accelerator with the reduced proton beam current it will be required about 56 tons of Pb-208, as a minimum, for the core coolant. Charges for its obtaining can be recovered at the expense of the economy of the proton accelerator construction cost. In this case, the acceptable price of the lead isotope Pb-208 must be less than $2,860/kg.
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Marmier, Alain, Michael A. Fu¨tterer, Kamil Tucˇek, Han de Haas, Jim C. Kuijper, and Jan Leen Kloosterman. "Revisiting the Concept of HTR Wallpaper Fuel." In Fourth International Topical Meeting on High Temperature Reactor Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/htr2008-58114.
Full textAbstract:
Good safety characteristics are an outstanding feature of High Temperature Reactors (HTR): • The high graphite inventory in the core provides significant thermal inertia. Graphite also has a high thermal conductivity, which facilitates the transfer of heat to the reflector, and it can withstand high temperatures; • The strongly negative Doppler coefficient gives a negative feedback, such that the reactor shuts down by itself in overpower accidental conditions; • The high quality of fuel elements — tri-isotropic (TRISO) coated particles — minimizes operational and accidental fission gas release. The materials selected have resistance to high temperatures; • The low power density enables stabilization of core temperature significantly below the maximum allowable, even in case of severe accidents (such as loss-of-coolant accident). Together, these aspects significantly reduce the risk of massive fission product release, which is one of the attractive features of HTRs. The fuel that is currently used in pebble bed reactors such as AVR, HTR-10 and soon PBMR is based on a homogeneous distribution of coated particles within a fuel pebble. This homogenizes power density in the pebble, but creates a radial temperature gradient across the fuel sphere. Fuel particles placed at its centre has the highest temperature. Reducing the average temperature of particles would help preserve their integrity and maintain the resistance of the first barrier against fission product release. As early as the 1970s, attempts were made to reduce the peak fuel temperature by means of so-called “wallpaper fuel”, in which the fuel is arranged in a spherical shell within a pebble. At that time, the production process was not sufficiently mature and had caused unacceptable damage to the (less performing) BISO particles, which is why this fundamentally promising concept was abandoned. In this paper, proposals will be put forward to improve the production process. This paper further exploits the wallpaper concept, not only from the point of view of temperature reduction, but also for enhanced neutronic performance through improved neutron economy, resulting in reduced fissile material and/or enrichment needs or providing the potential to achieve higher burn-up. Parameters modified were the density of the central fuel-free graphite zone and the packing fraction of the fuel zone. It is demonstrated that this fuel type impacts positively on the fuel cycle, reduces production of minor actinides (MA) and improves the safety-relevant parameters of the reactor. A comparison of these characteristics with PBMR-type fuel is presented. The calculations were performed using Monte Carlo neutron transport and depletion codes MCNP/MCB and the deterministic code WIMS. By comparison with PBMR fuel, the “wallpaper design” of the fuel pebble results in an effective neutron multiplication coefficient increase (by about 2%), which is combined with a decrease of between 3 and 15% in MA production. An improved neutron economy of the heterogeneous design enables enrichment of the “wallpaper type” of fuel to be reduced by more than 6%.
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Uber, Gordon T. "Flexible object-centered illuminator." In Fibers '91, Boston, MA, edited by Donald J. Svetkoff, Kevin G. Harding, Gordon T. Uber, and Norman Wittels. SPIE, 1991. http://dx.doi.org/10.1117/12.25341.
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Cowder, Justin D., Nicole J. Chimera, Thomas S. Buchanan, and Kurt T. Manal. "Estimation of Achilles Tendon Moment Arms In Vivo: A Novel Hybrid Method Using Ultrasound and Motion Analysis." In ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-193137.
Full textAbstract:
The musculotendon moment arm (MA) is the perpendicular distance from a muscle’s line of action to the rotational center of a joint. Moment arms are important in muscle modeling [1], and thus their accuracy is of great importance. Current in vivo techniques for computing MAs include the center of rotation and tendon excursion methods [1, 2]. The tendon excursion (TE) method relates the change in musculotendon length to an angular change in joint position [3]. This requires two measurements of musculotendon length for each MA computed. Similarly, the center of rotation method requires multiple image-based geometry measurements to compute the MA for a specific joint angle. The TE and center of rotation methods are both prone to measurement error, and thus it is difficult to ascertain the accuracy of the resulting MA. In this paper we present a novel hybrid methodology combining ultrasound (US) and video-based motion capture to compute the Achilles tendon moment arm. An advantage of this approach is that data used to derive the MA are acquired using highly accurate and reliable measurement instruments (i.e, US & motion capture), which may improve the accuracy of the MA estimate. The purpose of this paper is to present the hybrid methodology and validation results based on testing the method using an animal model.
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OLIVEIRA, Carlos Eduardo Campos de, Lara Sucupira FURTADO, and Fernanda Ferreira BARROSO. "A Tematização do Cotidiano no Centro Histórico de São Luís - MA." In VII Colóquio Internacional sobre Comércio e Cidade. São Paulo: Editora Blucher, 2020. http://dx.doi.org/10.5151/viicincci-08.
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Rocha da Silva, Marcos, Cecilia Rochele Silva de Abreu, Millena de Sousa Calixto, Kaíque Barbosa de Moura, and Rhubens Ewald Moura Ribeiro. "LOGÍSTICA E DISTRIBUIÇÃO EM CENTRO DE DISTRIBUIÇÃO (CD) EM TIMON-MA." In IV Simpósio de Engenharia, Gestão e Inovação. Recife: Even3, 2021. http://dx.doi.org/10.29327/sengi2021.347719.
Full textReports on the topic "Centre of ma"
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ENVIRONMENTAL SECURITY TECH CERT PROG. Advanced EMI Sensor Demonstration at the Central Impact Area, Camp Edwards, MA. Fort Belvoir, VA: Defense Technical Information Center, April 2013. http://dx.doi.org/10.21236/ada627133.
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Binder, Michael J., Franklin H. Holcomb, and William R. Taylor. Site Evaluation for Application of Fuel Cell Technology, U.S. Army Soldier Systems Center, Natick, MA. Fort Belvoir, VA: Defense Technical Information Center, May 2001. http://dx.doi.org/10.21236/ada394842.
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Dameron, Ben, Andrew Benson, Cora Blits, John Guillard, Alison Paski, John Breznick, Glenn R. Harbaugh, and Daniel A. Steinhurst. ESTCP Live Site Demonstrations, Massachusetts Military Reservations, Camp Edwards, MA; ESTCP MR-1365, Demonstration Data Report, Central Impact Area, TEMTADS MP 2x2 Cart Survey. Fort Belvoir, VA: Defense Technical Information Center, May 2014. http://dx.doi.org/10.21236/ada605468.
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Kingdon, James B., Dean A. Keiswetter, Thomas H. Bell, Matthew Barner, Andrew Louder, Andrew Gascho, Tamir Klaff, Glenn R. Harbaugh, and Daniel A. Steinhurst. 2012 ESTCP Live Site Demonstrations Massachusetts Military Reservation Camp Edwards, MA. ESTCP MR-1165 Demonstration Data Report Central Impact Area TEMTADS MP 2x2 Cart Survey. Fort Belvoir, VA: Defense Technical Information Center, January 2013. http://dx.doi.org/10.21236/ada585470.
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Hossain, Sharif M. I., Shongkour Roy, Sigma Ainul, Abdullah Al Mahmud Shohag, A. T. M. Rezaul Karim, and Ubaidur Rob. Assessing effectiveness of a person-centered group ANC-PNC model among first-time young mothers and their partners for improving quality and use of MNCH-FP services. Population Council, 2022. http://dx.doi.org/10.31899/sbsr2022.1041.
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This baseline report is part of an operations research project “Healthy Women, Healthy Families (HWHF): Shustha Ma, Shustha Poribar” led by Management Sciences for Health (MSH) in partnership with BRAC, SCOPE, and the Population Council. The project aims to improve quality and increase utilization of maternal, newborn, and child health (MNCH) and family planning (FP) services and information for young mothers-to-be, first-time mothers (FTMs) aged 15-24, and their partners in the urban municipality of Tongi, Gazipur District, Bangladesh, through a group antenatal care ANC-PNC approach. The objectives of this study are to establish baseline values of selected HWHF project result indicators against which the impacts of the project’s intervention can be measured. The target group is young, first-time parents and the study examines the current status of knowledge on MNCH-FP and access to services among FTMs. This quasi-experimental pre-post control group design study employs both quantitative and qualitative data-collection methods. A simple random sampling procedure was employed to select respondents from BRAC FTM lists, while qualitative informants were selected purposively.
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Gadd, M. G., J. M. Peter, and D. Layton-Matthews. Genesis of hyper-enriched black shale Ni-Mo-Zn-Pt-Pd-Re mineralization in the northern Canadian Cordillera. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/328013.
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Polymetallic (Ni-Mo-Zn-Pt-Pd-Au-Re) hyper-enriched black shales in the northern Canadian Cordillera consist of thin, semi-massive sulfides interbedded with black shale. We studied HEBS deposits at Nick, Peel River, Monster River, and Moss in northern Yukon, and at a single locality underlying the Cardiac Creek Pb-Zn-Ag deposit in northeastern British Columbia. High-grade mineralization contains up to 7.4 weight per cent Ni, 2.7 weight per cent Zn, 0.38 weight per cent Mo, 400 ppb Pt, 250 ppb Pd, 160 ppb Au, and 58.5 ppm Re. Sulfide mineralization formed during syngenesis to later diagenesis. Analyses by LA-ICP-MS indicate that pyrite is the principal host of platinum-group elements, Au, and Re. Mineralization and sedimentation were coeval based on the overlap between Re-Os geochronology of HEBS at Nick and Peel River (390.7 ± 5.1 and 387.3 ± 4.4 Ma, respectively) and conodont biostratigraphic ages of sedimentary host rocks. Bulk S isotope composition of HEBS is uniformly negative, indicating that bacterial reduction of seawater sulfate generated sulfur to precipitate sulfide minerals. The initial Os ratios at Peel River (0.25 ± 0.07) and Nick (0.32 ± 0.20) overlap with Middle Devonian seawater, suggesting that elemental enrichment was derived from seawater.
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Warrick, Arthur W., Gideon Oron, Mary M. Poulton, Rony Wallach, and Alex Furman. Multi-Dimensional Infiltration and Distribution of Water of Different Qualities and Solutes Related Through Artificial Neural Networks. United States Department of Agriculture, January 2009. http://dx.doi.org/10.32747/2009.7695865.bard.
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The project exploits the use of Artificial Neural Networks (ANN) to describe infiltration, water, and solute distribution in the soil during irrigation. It provides a method of simulating water and solute movement in the subsurface which, in principle, is different and has some advantages over the more common approach of numerical modeling of flow and transport equations. The five objectives were (i) Numerically develop a database for the prediction of water and solute distribution for irrigation; (ii) Develop predictive models using ANN; (iii) Develop an experimental (laboratory) database of water distribution with time; within a transparent flow cell by high resolution CCD video camera; (iv) Conduct field studies to provide basic data for developing and testing the ANN; and (v) Investigate the inclusion of water quality [salinity and organic matter (OM)] in an ANN model used for predicting infiltration and subsurface water distribution. A major accomplishment was the successful use of Moment Analysis (MA) to characterize “plumes of water” applied by various types of irrigation (including drip and gravity sources). The general idea is to describe the subsurface water patterns statistically in terms of only a few (often 3) parameters which can then be predicted by the ANN. It was shown that ellipses (in two dimensions) or ellipsoids (in three dimensions) can be depicted about the center of the plume. Any fraction of water added can be related to a ‘‘probability’’ curve relating the size of the ellipse (or ellipsoid) that contains that amount of water. The initial test of an ANN to predict the moments (and hence the water plume) was with numerically generated data for infiltration from surface and subsurface drip line and point sources in three contrasting soils. The underlying dataset consisted of 1,684,500 vectors (5 soils×5 discharge rates×3 initial conditions×1,123 nodes×20 print times) where each vector had eleven elements consisting of initial water content, hydraulic properties of the soil, flow rate, time and space coordinates. The output is an estimate of subsurface water distribution for essentially any soil property, initial condition or flow rate from a drip source. Following the formal development of the ANN, we have prepared a “user-friendly” version in a spreadsheet environment (in “Excel”). The input data are selected from appropriate values and the output is instantaneous resulting in a picture of the resulting water plume. The MA has also proven valuable, on its own merit, in the description of the flow in soil under laboratory conditions for both wettable and repellant soils. This includes non-Darcian flow examples and redistribution and well as infiltration. Field experiments were conducted in different agricultural fields and various water qualities in Israel. The obtained results will be the basis for the further ANN models development. Regions of high repellence were identified primarily under the canopy of various orchard crops, including citrus and persimmons. Also, increasing OM in the applied water lead to greater repellency. Major scientific implications are that the ANN offers an alternative to conventional flow and transport modeling and that MA is a powerful technique for describing the subsurface water distributions for normal (wettable) and repellant soil. Implications of the field measurements point to the special role of OM in affecting wettability, both from the irrigation water and from soil accumulation below canopies. Implications for agriculture are that a modified approach for drip system design should be adopted for open area crops and orchards, and taking into account the OM components both in the soil and in the applied waters.
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Rousseau, Henri-Paul. Gutenberg, L’université et le défi numérique. CIRANO, December 2022. http://dx.doi.org/10.54932/wodt6646.
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Introduction u cours des deux derniers millénaires, il y a eu plusieurs façons de conserver, transmettre et même créer la connaissance ; la tradition orale, l’écrit manuscrit, l’écrit imprimé et l’écrit numérisé. La tradition orale et le manuscrit ont dominé pendant plus de 1400 ans, et ce, jusqu’à l’apparition du livre imprimé en 1451, résultant de l’invention mécanique de Gutenberg. Il faudra attendre un peu plus de 550 ans, avant que l’invention du support électronique déloge à son tour le livre imprimé, prenant une ampleur sans précédent grâce à la révolution numérique contemporaine, résultat du maillage des technologies de l’informatique, de la robotique et de la science des données. Les premières universités qui sont nées en Occident, au Moyen Âge, ont développé cette tradition orale de la connaissance tout en multipliant l’usage du manuscrit créant ainsi de véritables communautés de maîtres et d’étudiants ; la venue de l’imprimerie permettra la multiplication des universités où l’oral et l’écrit continueront de jouer un rôle déterminant dans la création et la transmission des connaissances même si le « support » a évolué du manuscrit à l’imprimé puis vers le numérique. Au cours de toutes ces années, le modèle de l’université s’est raffiné et perfectionné sur une trajectoire somme toute assez linéaire en élargissant son rôle dans l’éducation à celui-ci de la recherche et de l’innovation, en multipliant les disciplines offertes et les clientèles desservies. L’université de chaque ville universitaire est devenue une institution florissante et indispensable à son rayonnement international, à un point tel que l’on mesure souvent sa contribution par la taille de sa clientèle étudiante, l’empreinte de ses campus, la grandeur de ses bibliothèques spécialisées ; c’est toutefois la renommée de ses chercheurs qui consacre la réputation de chaque université au cours de cette longue trajectoire pendant laquelle a pu s’établir la liberté universitaire. « Les libertés universitaires empruntèrent beaucoup aux libertés ecclésiastiques » : Étudiants et maîtres, qu'ils furent, ou non, hommes d'Église, furent assimilés à des clercs relevant de la seule justice ecclésiastique, réputée plus équitable. Mais ils échappèrent aussi largement à la justice ecclésiastique locale, n'étant justiciables que devant leur propre institution les professeurs et le recteur, chef élu de l’université - ou devant le pape ou ses délégués. Les libertés académiques marquèrent donc l’émergence d'un droit propre, qui ménageait aux maîtres et aux étudiants une place à part dans la société. Ce droit était le même, à travers l'Occident, pour tous ceux qui appartenaient à ces institutions supranationales que furent, par essence, les premières universités. À la fin du Moyen Âge, l'affirmation des États nationaux obligea les libertés académiques à s'inscrire dans ce nouveau cadre politique, comme de simples pratiques dérogatoires au droit commun et toujours sujettes à révision. Vestige vénérable de l’antique indépendance et privilège octroyé par le prince, elles eurent donc désormais un statut ambigu » . La révolution numérique viendra fragiliser ce statut. En effet, la révolution numérique vient bouleverser cette longue trajectoire linéaire de l’université en lui enlevant son quasi monopole dans la conservation et le partage du savoir parce qu’elle rend plus facile et somme toute, moins coûteux l’accès à l’information, au savoir et aux données. Le numérique est révolutionnaire comme l’était l’imprimé et son influence sur l’université, sera tout aussi considérable, car cette révolution impacte radicalement tous les secteurs de l’économie en accélérant la robotisation et la numérisation des processus de création, de fabrication et de distribution des biens et des services. Ces innovations utilisent la radio-identification (RFID) qui permet de mémoriser et de récupérer à distance des données sur les objets et l’Internet des objets qui permet aux objets d’être reliés automatiquement à des réseaux de communications .Ces innovations s’entrecroisent aux technologies de la réalité virtuelle, à celles des algorithmiques intelligentes et de l’intelligence artificielle et viennent littéralement inonder de données les institutions et les organisations qui doivent alors les analyser, les gérer et les protéger. Le monde numérique est né et avec lui, a surgi toute une série de compétences radicalement nouvelles que les étudiants, les enseignants et les chercheurs de nos universités doivent rapidement maîtriser pour évoluer dans ce Nouveau Monde, y travailler et contribuer à la rendre plus humain et plus équitable. En effet, tous les secteurs de l’activité commerciale, économique, culturelle ou sociale exigent déjà clairement des connaissances et des compétences numériques et technologiques de tous les participants au marché du travail. Dans cette nouvelle logique industrielle du monde numérique, les gagnants sont déjà bien identifiés. Ce sont les fameux GAFAM (Google, Apple, Facebook, Amazon et Microsoft) suivis de près par les NATU (Netflix, Airbnb, Tesla et Uber) et par les géants chinois du numérique, les BATX (Baidu, Alibaba, Tenant et Xiaomi). Ces géants sont alimentés par les recherches, les innovations et les applications mobiles (APPs) créées par les partenaires de leurs écosystèmes regroupant, sur différents campus d’entreprises, plusieurs des cerveaux qui sont au cœur de cette révolution numérique. L’université voit donc remise en question sa capacité traditionnelle d’attirer, de retenir et de promouvoir les artisans du monde de demain. Son aptitude à former des esprits critiques et à contribuer à la transmission des valeurs universelles est également ébranlée par ce tsunami de changements. Il faut cependant reconnaître que les facultés de médecine, d’ingénierie et de sciences naturelles aux États-Unis qui ont développé des contacts étroits, abondants et suivis avec les hôpitaux, les grandes entreprises et l’administration publique et cela dès la fin du 19e siècle ont été plus en mesure que bien d’autres, de recruter et retenir les gens de talent. Elle ont énormément contribué à faire avancer les connaissances scientifiques et la scolarisation en sciences appliquées ..La concentration inouïe des Prix Nobel scientifiques aux États-Unis est à cet égard très convaincante . La révolution numérique contemporaine survient également au moment même où de grands bouleversements frappent la planète : l’urgence climatique, le vieillissement des populations, la « déglobalisation », les déplacements des populations, les guerres, les pandémies, la crise des inégalités, de l’éthique et des démocraties. Ces bouleversements interpellent les universitaires et c’est pourquoi leur communauté doit adopter une raison d’être et ainsi renouveler leur mission afin des mieux répondre à ces enjeux de la civilisation. Cette communauté doit non seulement se doter d’une vision et des modes de fonctionnement adaptés aux nouvelles réalités liées aux technologies numériques, mais elle doit aussi tenir compte de ces grands bouleversements. Tout ceci l’oblige à s’intégrer à des écosystèmes où les connaissances sont partagées et où de nouvelles compétences doivent être rapidement acquises. Le but de ce texte est de mieux cerner l’ampleur du défi que pose le monde numérique au milieu universitaire et de proposer quelques idées pouvant alimenter la réflexion des universitaires dans cette démarche d’adaptation au monde numérique. Or, ma conviction la plus profonde c’est que la révolution numérique aura des impacts sur nos sociétés et notre civilisation aussi grands que ceux provoqués par la découverte de l’imprimerie et son industrialisation au 15e siècle. C’est pourquoi la première section de ce document est consacrée à un rappel historique de la révolution de l’imprimerie par Gutenberg alors que la deuxième section illustrera comment les caractéristiques de la révolution numérique viennent soutenir cette conviction si profonde. Une troisième section fournira plus de détails sur le défi d’adaptation que le monde numérique pose aux universités alors que la quatrième section évoquera les contours du changement de paradigme que cette adaptation va imposer. La cinquième section servira à illustrer un scénario de rêves qui permettra de mieux illustrer l’ampleur de la gestion du changement qui guette les universitaires. La conclusion permettra de revenir sur quelques concepts et principes clefs pour guider la démarche vers l’action. L’université ne peut plus « être en haut et seule », elle doit être « au centre et avec » des écosystèmes de partenariats multiples, dans un modèle hybride physique/virtuel. C’est ainsi qu’elle pourra conserver son leadership historique de vigie du savoir et des connaissances d’un monde complexe, continuer d’établir l’authenticité des faits et imposer la nécessaire rigueur de la science et de l’objectivité.