Academic literature on the topic '93D20'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic '93D20.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "93D20"
1
Randriamanovontsoa, Niaina Ezra, Hanta Rasataharifetra, Andriatompoina Felanarivo Razafindraibe, Tahino Niaina Andriarivony, and Florine Rafaramino. "Connaissance, Attitude et Pratique des Médecins de Toamasina I Sur la Prévention du Cancer du Col de l’Utérus." European Scientific Journal, ESJ 19, no. 6 (February 28, 2023): 444. http://dx.doi.org/10.19044/esj.2023.v19n6p444.
Full textAbstract:
Introduction: L’objectif de cette étude vise à décrire la connaissance, l’attitude et la pratique des médecins de de Toamasina I sur la prévention du cancer du col utérin. Méthodes: Il s’agissait d’une enquête transversale descriptive du 1er Novembre 2020 au 31 Janvier 2021. La connaissance ou la pratique était supposée suffisante si 75% ou plus des médecins trouvent la bonne réponse à la question posée. Cette étude a obtenu l’autorisation des chefs hiérarchiques ainsi que le consentement des participants. Résultats : L’âge médian des 74 participants se situait à 40 ans. Ils étaient médecins généralistes, pratiquant à moins de 10ans, exerçant dans un centre public respectivement : 71,60% ; 45,90% ; 63,50%. Ils savaient dans 98,6% que l’HPV favorise le développement de cancer du col utérin. Les enquêtés ont réponses justes aux moyens de dépistage dans 78,10%. Ils estimaient dans 93,20% que le cancer du col peut être guéri s’il est découvert précocement. La proposition d’un dépistage aux femmes cibles, la prescription de frottis cervico-utérin et la pratique de l’IVA étaient évaluées respectivement : 93,20% ; 48,70% ; 25,70%. Discussion: Ces médecins avaient de bonnes connaissances mais ils manquaient de pratique probablement à cause de plateau technique insuffisante. Ces résultats ne reflètent pas la réalité des médecins malgaches. Conclusion: Les médecins possédaient des connaissances relativement suffisantes mais la mise en pratique était encore insuffisante. La formation post universitaire et la mise en place d’un plateau technique adéquat sont nécessaires.
Introduction: The objective of thisstudyis to describe the knowledge, attitude and practice of doctors in Toamasina I on cervical cancer prevention. Methods: This was a descriptive cross-sectionalsurveyfrom 1 November 2020 to 31 January 2021. Knowledge or practicewasassumed to besufficient if 75% or more of the doctorsfound the correct answer to the question asked. This studyobtained the permission of the line managers and the consent of the participants. Results: The medianage of the 74 participants was 40years. Theyweregeneralpractitioners, practisingwithin 10 years, working in a public centre respectively: 71.60%; 45.90%; 63.50%. Theyknewin 98.6% that HPV promotes the development of cervical cancer. The respondentsindicatedin 82.40% that the anti-HPV vaccine exists. They gave two correct answers to the means of screening in 78.10%. In 93.20% of cases, theyconsideredthat cervical cancer canbecured if itisdiscoveredearly. The proposal of screening to targetwomen, the prescription of cervicalsmear and the practice of VIA wereevaluatedrespectively: 93.20%; 48.70%; 25.70%. Discussion : Thesedoctorshad good knowledge but lacked practice, probably due to insufficienttechnicalequipment. Theseresults do not reflect the reality of Malagasy doctors. Conclusion: The doctorshadrelativelysufficientknowledge but the practical application wasstillinsufficient. Postgraduate training and the establishment of an adequatetechnicalplatform are necessary.
2
Houaoui, Amel, Agata Szczodra, Mari Lallukka, Lamia El-Guermah, Remy Agniel, Emmanuel Pauthe, Jonathan Massera, and Michel Boissiere. "New Generation of Hybrid Materials Based on Gelatin and Bioactive Glass Particles for Bone Tissue Regeneration." Biomolecules 11, no. 3 (March 17, 2021): 444. http://dx.doi.org/10.3390/biom11030444.
Full textAbstract:
Hybrid scaffolds based on bioactive glass (BAG) particles (<38 µm), covalently linked to gelatin (G*) using 3-glycidoxypropyltrimethoxysilane (GPTMS), have been studied for bone bioengineering. In this study, two glass compositions (13-93 and 13-93B20 (where 20% of the SiO2 was replaced with B2O3)) were introduced in the gelatin matrix. The Cfactor (gelatin/GPTMS molar ratio) was kept constant at 500. The hybrids obtained were found to be stable at 37 °C in solution, the condition in which pure gelatin is liquid. All hybrids were characterized by in vitro dissolution in Tris(hydroxymethyl)aminomethane (TRIS) solution (for up to 4 weeks) and Simulated Body Fluid (SBF) (for up to 2 weeks). Samples processed with 13-93B20 exhibited faster initial dissolution and significantly faster precipitation of a hydroxyapatite (HA) layer. The faster ion release and HA precipitation recorded from the G*/13-93B20 samples are attributable to the higher reactivity of borosilicate compared to silicate glass. The MC3T3-E1 cell behavior in direct contact with the hybrids was investigated, showing that the cells were able to proliferate and spread on the developed biomaterials. Tailoring the glass composition allows us to better control the material’s dissolution, biodegradability, and bioactivity. Bioactive (especially with 13-93B20 BAG) and biocompatible, the hybrids are promising for bone application.
3
Kim, Changsoo, Seungik Baek, and Keunseog Park. "An Experimental Study on the Adherence Strength Characteristics of EA-9320 Adhesive and Aluminum Alloy." Journal of the Korean Society for Aviation and Aeronautics 27, no. 3 (September 2019): 24–29. http://dx.doi.org/10.12985/ksaa.2019.27.3.024.
Full text
4
Duan, Jinyou, Fikri Y. Avi, and Dennis L. Kasper. "Reactive Nitrogen species process a microbial carbohydrate presented by the MHCII Pathway (93.20)." Journal of Immunology 178, no. 1_Supplement (April 1, 2007): S169. http://dx.doi.org/10.4049/jimmunol.178.supp.93.20.
Full textAbstract:
Abstract The class II major histocompatibility complex (MHCII) pathway in antigen-presenting cells (APCs) is the conduit by which extracellular proteins are processed by proteases, resulting in foreign peptides being presented to T cells. After depolymerization to a markedly decreased molecular size, zwitterionic polysaccharides (ZPSs) are also presented by this pathway. However, nothing is known about the chemistry of carbohydrate processing apart from its dependence on the presence of inducible nitric oxide synthase (iNOS). By examining the ability of known nitric oxide-derived species, peroxynitrite, nitroxyl, and nitric oxide itself, to degrade polysaccharide A (PSA), a ZPS from Bacteroides fragilis, we determined that deamination was the predominant mechanism of PSA processing in APCs. Structural characterization of the nitric oxide-derived product PSA-NO indicated that the depolymerization didn¡t disturb PSA¡s repeat units with exception of the deamination cleavage of 4-amino groups of 3-linked 2-acetamido-4-amino-2,4,6-trideoxy galactopyranosyl (AATp) residues. PSA-NO presented by APCs induced CD4+ T cell proliferation that was blocked by inhibitors of endosomal processing and by an antibody to HLA-DR. A novel mechanism (deaminative reaction) differentiates carbohydrate from protein processing during the oxidative burst.
5
Ortega Martell, José Antonio. "Pandemia por coronavirus SARS-CoV-2/ COVID-19: un enfoque inmunológico." Alergia, Asma e Inmunología Pediátricas 29, no. 1 (2020): 3–4. http://dx.doi.org/10.35366/93320.
Full text
6
Park, Min, Kee-Mo Lee, Eun-Mi Kim, Yong-Wook Park, Seung-Jung Kee, and Hyung-Sik Kang. "Differential gene expression profiles in the spontaneously hypertensive rats administrated with anti-hypertensive drugs (93.20)." Journal of Immunology 182, no. 1_Supplement (April 1, 2009): 93.20. http://dx.doi.org/10.4049/jimmunol.182.supp.93.20.
Full textAbstract:
Abstract To identify and characterize the genes involved in the functional regulation of hypertension and arteriosclerosis-specific genes, changes in gene expression profiles were examined by DNA microarray from the spontaneously hypertensive rats (SHR) and normal the Wistar-Kyoto (WKY) rats after administration with anti-hypertension drugs, including angiotensin I-converting enzyme (ACE) inhibitor, enalapril and the calcium channel blocker, nifedifine. Among the genes that were distinct and differentially expressed in brain, heart and liver of SHR rats administrated with the drugs, 113 were specifically up-regulated, and 102 were down-regulated genes compared to those of WKY or SHR rats. The differential gene expression profiles in DNA microarray were corroborated by semi-quantitative RT-PCR. Of these genes, expression of TNFSF4, 6, 10, IL-6 receptor, IL-18 receptor accessory protein and CD24 genes was extensively exhibited in a hypertension-specific manner, and patterns for hypertension-associated gene expression was regulated by changes of their expression in angiotensin ¥± or H2O2-treated vascular smooth muscle cells. These results will provide a fundamental basis to delineate the novel mechanisms, and a thorough investigation of the relationship between their expression and function will provide a better understanding in the development of new therapeutic drugs against cardiovascular diseases. This work was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (KRF-2006-005-J03003)
7
Akhtar, Shamila, Fawad Hussain, Fawad Riasat Raja, Muhammad Ehatisham-ul-haq, Naveed Khan Baloch, Farruh Ishmanov, and Yousaf Bin Zikria. "Improving Mispronunciation Detection of Arabic Words for Non-Native Learners Using Deep Convolutional Neural Network Features." Electronics 9, no. 6 (June 9, 2020): 963. http://dx.doi.org/10.3390/electronics9060963.
Full textAbstract:
Computer-Aided Language Learning (CALL) is growing nowadays because learning new languages is essential for communication with people of different linguistic backgrounds. Mispronunciation detection is an integral part of CALL, which is used for automatic pointing of errors for the non-native speaker. In this paper, we investigated the mispronunciation detection of Arabic words using deep Convolution Neural Network (CNN). For automated pronunciation error detection, we proposed CNN features-based model and extracted features from different layers of Alex Net (layers 6, 7, and 8) to train three machine learning classifiers; K-nearest neighbor (KNN), Support Vector Machine (SVM) and Random Forest (RF). We also used a transfer learning-based model in which feature extraction and classification are performed automatically. To evaluate the performance of the proposed method, a comprehensive evaluation is provided on these methods with a traditional machine learning-based method using Mel Frequency Cepstral Coefficients (MFCC) features. We used the same three classifiers KNN, SVM, and RF in the baseline method for mispronunciation detection. Experimental results show that with handcrafted features, transfer learning-based method and classification based on deep features extracted from Alex Net achieved an average accuracy of 73.67, 85 and 93.20 on Arabic words, respectively. Moreover, these results reveal that the proposed method with feature selection achieved the best average accuracy of 93.20% than all other methods.
8
Munikar, Sabika, and Kanchan Thapa. "Determinants and Aspirants of Nurse Migration from Nepal: A Cross Sectional Study from Kathmandu." Medical Journal of Shree Birendra Hospital 18, no. 2 (July 12, 2019): 22–28. http://dx.doi.org/10.3126/mjsbh.v18i2.22855.
Full textAbstract:
Introduction: Migration is the result of interplay of many factors, which guide the individual’s decision to emigrate. Health workers tend to go where the working conditions are best. This study aims to identify the determinants and aspirants of nurse migration from Nepal.
Methods: A descriptive cross sectional study was conducted using interview technique. A semi structured questionnaire was administered to all nurses working at a private hospital who met the inclusion criteria.
Results: Majority of the participants were 20- 30 years old (93.20%), Hindu (86.5%), Chhetri (35.1%), unmarried (66.2%), had completed intermediate level (58.1%). Among the total respondents, 93.20% intended to migrate to abroad and more than half of the respondent (62.20%) preferred Australia as destination. The general factor provoking migration was bad nature of politician (98.6%) followed by political instability (90.5%) and non-availability of job (90.5%). The major working condition and social factors provoking migration were occupational security in other country (85.10%) and peer influence (91.9%) respectively. The reasons for migration as mentioned by respondents were education (59.50%) followed by better job opportunities (40.50%), better living standard (21.60%) and family and/or peer pressure (8.10%).
Conclusions: The present study concluded that majority wanted to migrate and Australia was famous choices for nurses. Bad nature of politician, occupational security in other country and peer influence were factors for migration. The major purpose for migration was education.
9
Gianguzzi, Lorenzo, Simonetta Bagella, Giuseppe Bazan, Maria Carmela Caria, Bruno Enrico Leone Cerabolini, Alice Dalla Vecchia, Giovanni Rivieccio, and Rossano Bolpagni. "New national and regional Annex I Habitat records: from #13 to #15." Plant Sociology 57, no. 1 (July 3, 2020): 65–74. http://dx.doi.org/10.3897/pls2020571/07.
Full textAbstract:
New data on the distribution of the Annex I Habitats 3160, 7210* and 9320 are reported in this contribution. In detail, 24 new occurrences in Natura 2000 Sites are presented and 42 new cells in the EEA 10 km x 10 km Reference grid are added. The new data refer to Italy and in particular to the Administrative Regions Lombardy, Sardinia, and Sicily.
10
Bazan, Giuseppe, Gianluigi Bacchetta, Simonetta Bagella, Gianmaria Bonari, Federica Bonini, Giacomo Calvia, Maria Carmela Caria, Giovanni Rivieccio, and Lorenzo Gianguzzi. "New national and regional Annex I Habitat records: from #21 to #25." Plant Sociology 58, no. 1 (July 12, 2021): 167–78. http://dx.doi.org/10.3897/pls2021581/09.
Full textAbstract:
New Italian data on the distribution of the Annex I Habitats 3170*, 6110*, 91E0*, 9320, 9330 are reported in this contribution. Specifically, one new occurrence in Natura 2000 sites is presented and six new cells are added in the European Environment Agency 10 km × 10 km reference grid. The new data refer to the Italian administrative regions of Sardinia, Sicily and Umbria.
Dissertations / Theses on the topic "93D20"
1
Mokhtari, Yacine. "Stabilisation et contrôle de quelques systèmes hyperboliques." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2021. http://www.theses.fr/2021UBFCD024.
Full textAbstract:
Cette thèse est consacrée à l’étude de deux problèmes issus de la théorie du contrôle des EDP. Dans un premier temps, on étudie le comportement asymptotique de la solution du système de von Kàrmàn viscoélastique unidimensionnel avec retard. On montre que ce dernier est bien posé dans un espace fonctionnel convenable en utilisant la méthode de Faedo-Galerkin. Pour établir notre résultat de stabilité, on utilise la méthode de Lyapunov en construisant une fonctionnelle adéquate. Dans un deuxième temps, on étudie le problème de la contrôlabilité et de la stabilisation par le bord pour l’équation des ondes unidimensionnelle dans un domaine non cylindrique. Pour la contrôlabilité, on utilise la méthode des caractéristiques pour construire l’unique solution du problème. Nous sommes alors capables de donner l’expression explicite du contrôle pour lequel le système atteint le point d’équilibre après un certain temps. De plus, on montre que ce temps est optimal. Pour la stabilisation, nous fournissons une condition nécessaire et suffisante pour que l’énergie du système décroisse à un taux prédéterminé. De plus, l’influence de la géométrie du domaine et l’influence d’un amortisseur dépendant du temps sont clarifiées. Dans un troisième temps, on étudie la contrôlabilité par le bord de deux ´équations d’ondes couplées par un couplage d’ordre un avec coefficients qui dépendent de l’espace et du temps. On fournit une condition nécessaire et suffisante pour la contrôlabilité exacte en haute fréquences dansle cas général et pour la continuation unique dans le cas cascadeThis thesis is devoted to the study of two problems related to the theory of control of PDE.In a first time, we study the asymptotic behavior of the solution to the one-dimensional viscoelastic von Kàrmàn system with delay. We prove that the latter system is well-posed in a suitable functional space using the Faedo-Galerkin method. To establish our stability result, we employ the Lyapunov method by using a suitable candidate functional.In a second time, we study the problem of boundary controllability and stabilization for the one-dimensional wave equation in non-cylindrical domains. For the controllability, one uses the characteristics method to build the unique solution. We will then be able to give the explicit expression of the controls for which the system reaches the equilibrium point after a certain time. Moreover, we show that this time is optimal.For the stabilization, we provide a necessary and sufficient condition that guarantees the energy decay at any desired rate. In addition, the influences of the domain geometry and time-dependent feedback are clarified. In a third time, we study the boundary controllability of two coupled one-dimensional wave equations with first-order coupling terms with coefficients depending on space and time. We give a necessary and sufficient conditions for both exact controllability in high frequency in the general case and for the unique continuation in the cascade case
2
Ooi, Chia Ai. "Balancing control for grid-scale battery energy storage systems." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/93020/.
Full textAbstract:
Grid-scale battery energy storage systems (BESSs) are becoming increasingly attractive as the connection of a BESS has been shown to improve the dynamic behaviours of the power grid. A key problem with BESSs is the potential for poor utilisation of mismatched cells and reliability issues resulting from the use of a large number of cells in series. This thesis proposes a technique for state-of-charge balancing of many thousands of cells individually (i.e. not in packs) using a tightly integrated power electronic circuit coupled with a new control system design. Cells are organised in a hierarchical structure consisting of modules, sub-banks, banks and phases. The control strategy includes five levels of balancing: balancing of cells within a module, balancing of modules within a sub-bank, sub-banks within a bank, banks in a phase and balancing between phases. The system seeks to maximise the accessible state-of-charge range of each individual cell, thereby enhancing the overall capacity of the system. The system is validated in simulation for a 380 kWh BESS using 2835 lithium-ion cells where charge balancing is demonstrated for mismatched cells. A ‘peak sharing’ concept is implemented to manage voltage constraints so that alternative modules assume a portion of the load when certain modules are not capable of meeting the demand. An experimental validation has been performed to demonstrate the effectiveness of the balancing control. This work is intended to address the challenges of eventual scaling towards a 100 MWh+ BESS, which may be composed of hundreds of thousands of individual cells.
3
Spooner, Stephen. "Quantifying the transient interfacial area during slag-metal reactions." Thesis, University of Warwick, 2017. http://wrap.warwick.ac.uk/93620/.
Full textAbstract:
The steel industry is facing significant competition on a global scale due to the drive for light-weighting and cheaper more sustainable construction. Not aided by oversupply in geographic sectors of the industry, there is significant competition within the slowly shrinking sector. The recent growth in developing countries through installation of modern plant technology has led to the reduction in unique selling points for mature steelmaking locations. As such, to compete with the equalling product capability and innate cheaper production costs within developing areas the industries in Europe and North America require significant improvements in productivity and agile resource management. To date the basic oxygen furnace has been somewhat treated as a black box within industry, where only control parameters are monitored, not the fundamental mechanisms within the converter. Studies over the past 30 years have shown the basic oxygen furnace is unable to attain the thermodynamic minimum phosphorus content within the output liquid steel. Coupled with the need to drive down resource cost, with a potential for high content phosphorus ores the internal dynamic system of the basic oxygen furnace requires more rigorous understanding. With the aid of in-situ sampling of a pilot scale basic oxygen furnace, and laboratory studies of individual metal droplets suspended in a slag medium (known to be a key driving environment for impurity removal) the present project aims to provide insight into the transient interfacial area between slag and liquid metal through basic oxygen steelmaking processing. Initially the macroscopic dynamics including the amount of metal suspended in the gas/slag/metal emulsion, the period of time it is suspended for, and the speed at which it moves, is investigated. It was found that these parameters vary greatly through the blow, with a normal peak in residence times near the beginning of the blow and a dramatic increase in metal circulation rates at the end of the blow, when foaming is reduced or collapsed. Further to this, a method of interrogating the size of metal droplets within the slag layer using X-ray computed tomography is introduced. The study then progresses into the microscopic environments that individual droplets are subjected to during steel processing. Initially the cause of spontaneous emulsification in basic oxygen furnace type slags is investigated through high temperature-confocal scanning laser microscopy/X-ray computed tomography led experimentation, with the addition of null experiments conducted to rationalize the experimental technique. It was found that the flux of oxygen across the interface was the cause and thus the confirmation of material transfer across the interface being the driving force. Furthermore the physical pathway of emulsification is interrogated and quantified, with in-situ observation of spontaneous emulsification in the high temperature-confocal scanning laser microscope enabled through use of optically transparent slags. The life cycle of perturbation growth, necking and budding is observed and quantified through high-resolution X-ray computed tomography. In addition a phase-field model is developed to interrogate slag/metal systems in 2D and 3D variations, giving rise to the ability to track the cause of emulsification and to predict its occurrence. Finally the project progresses with the in-situ investigation of spontaneous emulsification as a function of initial metal composition. The behaviour of droplet spontaneous emulsification is seen to reduce in severity and subsequently to decline into a non-emulsifying regime below a critical level. Free energy calculations coupled with a measure of the global interfacial tension increase give quantifiable reasoning as to the behaviour seen.
4
Piccioli, de Carolis Giorgio. "Nuovi copolimeri statistici a base di poli(butilene 2,5-furanoato): effetto della copolimerizzazione sulle proprietà chimico-fisiche, proprietà barriera e compostabilità." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9320/.
Full textAbstract:
In questo lavoro di Tesi Magistrale si sono esaminate le problematiche relative agli impatti ambientali delle materie plastiche, tenendo in considerazione il loro ambito di applicazione. Per quanto riguarda le materie plastiche destinate al packaging alimentare si è visto che uno smaltimento tramite discarica, incenerimento o riciclo non può essere sostenibile sul lungo periodo. Una soluzione può essere lo sviluppo di un materiale che al termine del ciclo di vita possa essere biodegradato tramite compostaggio. Al fine di eliminare la dipendenza di questo materiale plastico dalle risorse fossili, esso deve poter essere ricavato da fonti rinnovabili. Il poli(butilene furanoato) è un buon candidato come materiale plastico per il packaging alimentare, ma possiede scarse caratteristiche di biodegradabilità. Si è quindi realizzato un sistema copolimerico in cui il poli(butilene furanoato) viene statisticamente copolimerizzato con il poli(butilene diglicolato), anche quest'ultimo interamente ottenibile da fonti rinnovabili. I materiali sintetizzati sono stati sottoposti a diversi tipi di analisi, al fine di determinarne le proprietà in funzione di una possibile applicazione nel packaging alimentare: analisi strutturale, caratterizzazione termica, studio delle proprietà meccaniche e di permeabilità a diversi tipi di gas e infine valutazione della compostabilità.
5
Kruschwitz, Jonathan A. "Interludes and irony in the ancestral narrative." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/9320/.
Full textAbstract:
The strange stories of Hagar, Dinah, and Tamar unsettle the ancestral narrative in Genesis. Whereas the ancestral narrative revolves around the interests of the ancestral family, these stories deviate from the main plot and draw attention to the interests of non- ancestral characters. Interpretation traditionally domesticates the strange stories by focusing on how they may serve the purposes of the embedding ancestral narrative. This thesis, however, revives the question of their strangeness and proposes an original response: the strange stories are interludes that ironize ancestral identity. The concepts of interlude and irony lay the methodological groundwork for this thesis. Because scholarship commonly identifies the strange stories as “interludes,” this study innovates a poetics of the interlude. This poetics, which derives from the model of certain musical interludes, suggests that the interlude’s function is to develop primary thematic content. While scholarship conventionally allows the primary narrative to determine the significance of the interlude, this poetics illumines how the interlude may determine aspects of the primary narrative. A hermeneutics of irony, in turn, offers a persuasive account of how an interlude may develop primary thematic material. This study bases its hermeneutics on the idea that irony consists in quoting a prior proposition and implying a negative judgment toward it. When the interludes invoke central ancestral motifs, they may mean something different—even contrary—to what was meant before. A poetics of the interlude and a hermeneutics of irony drive this study’s close readings of the strange stories. The close readings demonstrate how the interludes ironize key themes of ancestral identity: the ancestral-divine relationship, ancestral relations to the land and its inhabitants, and ancestral self-identity. Each interlude subverts the conventionally exclusive formulation of an ancestral theme and shows that, while ancestral identity may be contained in the ancestral family, it is not contained by it.
6
Esteban, Vea Pere. "Classificació de tipus de circulació atmosfèrica: proposta metodològica i aplicacions." Doctoral thesis, Universitat de Barcelona, 2012. http://hdl.handle.net/10803/93320.
Full textAbstract:
La classificació de la circulació atmosfèrica s’ha abordat de diferents maneres: mètodes manuals, mixtes, basats en l’estadística multivariant, entre d’altres. En aquest treball es fa un extens i actualitzat recorregut per aquests mètodes i es fa una proposta metodològica basada en l’anàlisi per components principals: el mètode de les puntuacions extremes. Aquesta metodologia, basada en l’aproximació tradicional que empra la matriu tipus S, proposa una estandardització espacial de les dades originals (malles), l’ús dels valors més elevats de les puntuacions factorials per a la determinació del nombre de grups de la classificació i els seus centroides, i finalment l’assignació dels casos a algun dels grups sense l’ús de les iteracions característiques dels mètodes de k-mitjanes.
La proposta s’aplica posteriorment a diferents casos pràctics relacionats amb diferents enfocs de les ciències atmosfèriques: meteorologia de muntanya, variabilitat climàtica i canvi climàtic, cartografia climàtica i riscos meteorològics. Aquests casos pràctics es presenten a través de quatre articles publicats a diferents revistes internacionals.
El primer cas fa una caracterització de les nevades intenses al Principat d’Andorra a partir de la classificació de la pressió en superfície a l’àmbit de l’Europa Occidental, obtenint-se set patrons de circulació que expliquen la varietat de situacions associades a nevades superiors a 30cm en 24 hores en algun lloc del Principat. La detecció d’aquesta variabilitat, i la detecció de situacions de la mateixa component però amb diferencies en el gradient de pressió fan del catàleg obtingut com una eina interessant en la predicció meteorològica en aquest sector del Pirineu. Aquest article va ser publicat a la revista International Journal of Climatology l’any 2005.
El segon cas fa una classificació genèrica de la circulació atmosfèrica a l’Europa Occidental, entre 1960 i 2001 i emprant, com en el cas anterior, el reanàlisi de l’NCEP-NCAR (1 dada diària i 2.5º de resolució espacial). S’obtenen 20 patrons que expliquen de forma molt completa la variabilitat de la circulació atmosfèrica en aquest sector. A més, per cadascun dels patrons obtinguts s’ha calculat la seva distribució anual i la seva tendència al llarg del període. Precisament sobre aquest darrer punt, alguns patrons mostren tendències estadísticament significatives que apunten cap a un increment de les situacions de bloqueig anticiclònic durant les dècades estudiades. L’article fou publicat a International Journal of Climatology al 2006.
El tercer cas aborda la obtenció de cartografia de temperatura i precipitació en zones d’orografia complexa (Andorra) relacionada amb els patrons de circulació obtinguts en el treball anterior. Els resultats, 80 mapes d’alta resolució calculats amb el mètode de la regressió múltiple, mostren la variabilitat climàtica local basada en la discriminació que estableix un catàleg de la circulació atmosfèrica. L’article fou publicat a la revista Theoretical and Applied Climatology al 2009.
Finalment, el quart cas aborda l’activitat dels llamps al sector d’Andorra i Catalunya, però en aquest cas classificant una malla de pressió en superfície de més resolució temporal i espacial (dades cada 6 hores i a 1º). S’obtenen nou tipus de circulació atmosfèrica que representen situacions de caràcter advectiu (definides sobretot pel context sinòptic), dominades per la dinàmica mesoescalar (normalment efecte del dipol orogràfic pirinenc), o situacions de caràcter tèrmic dominades per la manca de gradient bàric. Aquest treball fou publicat a Physics and Chemistry of the Earth al 2010.
Els resultats mostren que la proposta del mètode de les puntuacions extremes és una opció prou robusta per a la obtenció de tipus de circulació atmosfèrica i que pot ser aplicada a diferents resolucions temporals i espacials. Aquest mètode ha estat implementat al programari lliure COST733class desenvolupat en l’àmbit del projecte europeu COST733 (2005-2010) centrat en la comparació i avaluació de mètodes de classificació de la circulació atmosfèrica.Atmospheric circulation types classification: a method proposal and applications The classification of atmospheric circulation has been addressed via different methodological approaches: manual methods, mixed methods, based on multivariate techniques, etc. In this work we present an extensive overview of the main existing typologies of circulation type classification methods for finally propose a new approach based on principal component analysis: the method of extreme scores. This new approach highlight the spatial standardization of the original data (gridded data), the use of the factor scores for determining the total amount of circulation types and their centroids, and finally support the non use of iterations for the final classification of all the cases into the groups via the Euclidian distance. The proposal is then applied to heavy snow precipitation events in Andorra (Pyrenees), to climate variability analysis over Western Europe, to the interpolation of climate variables in mountain areas (temperature and precipitation in Andorra) based on circulation types, and for analyze relevant lightning activity over the sector of Catalonia and Andorra. These applications are presented trough the corresponding publications in international scientific journals, and exemplify the usefulness of the atmospheric circulation classification methods for the study of mountain meteorology, climate variability and climate change, climate mapping in areas of complex topography using GIS techniques, and weather hazards situations. In addition, these applications also demonstrate the goodness of the proposed method of the extreme scores. This method of the extreme scores has been included in the classification software COST733class developed by the European project COST733 that was focused on the comparison and evaluation of circulation type classification methods.
7
Foggetti, Cristiano [UNESP]. "O programa de capacitação Cana Limpa: uma avaliação sob a ótica dos cortadores de cana." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/93020.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:26:16Z (GMT). No. of bitstreams: 0
Previous issue date: 2009-01-26Bitstream added on 2014-06-13T20:34:07Z : No. of bitstreams: 1
foggetti_c_me_bauru.pdf: 1964938 bytes, checksum: e28b897e2e00a7fcd336f4b45dea781e (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Atualmente, com o alto consumo da cana de açúcar, indústrias buscam melhorias na gestão ambiental do processo produtivo do setor sucroalcooleiro, passando assim, inevitavelmente, pela melhor produção da cana, seus produtos e subprodutos, consequentemente uma melhor maneira de conduzir a colheira da planta. Com isso começam a surgir programas como o estudado neste trabalho O Cana Limpa, que se espalha pelas usinas do país. A sustentabilidade de um Programa de tal natureza não depende apenas de quem o patrocina ou do empresário, mas também, primordialmente daqueles que são afetados diretamente por este. Esta premissa e a dúvida sobre a adequação do programa dos trabalhadores motivaram esta proposta. Certamente o programa deve ter sido concebido para contemplar não só a produtividade para a empresa, mas também, melhores condições de vida no trabalho para os cortadores. Mas que opinião tem os mesmos? Assim, na busca de resposta a esta questão o objetivo desse trabalho é o de avaliar o Programa Cana Limpa, desde o ponto de vista do cortador verificando seus pontos fortes, fracos e melhorias necessárias ao Programa. Embora a participação do homem se dê em várias das fases dos processos produtivos do setor sucro-alcooleiro, a presente proposta enfoca apenas o trabalho durante a colheita de cana de açúcar. Esta pesquisa quanto ao método tem duas fases. A primeira é qualitativa e exploratória. Nesta fase busca levantar as variáveis para avaliar o programa. Após a identificação das variáveis tem-se uma segunda fase, quantitativa descritiva, onde se avalia o grau de existência das variáveis encontradas, ou seja, estas variáveis da primeira fase não utilizadas na elaboração de questões do instrumento de coleta de dados. Nesta fase é construído um instrumento de coleta de dados com questões fechadas utilizando escala ordinal...
Due to the high consumption of sugar cane, industries have been searching to improve environmental management in the sugar and alcohol production processes, thus resulting in improved production of sugar cane and its by products as well as improved harvesting techniques. The Cana Limpa (clean sugar cane) is one of the programs that arose as a result of this search for improvement in sugar cane production and harvesting. To say that a program is sustainable depends not only on the sponsor or the entrepreneur, but also on the people that are directly affected by such a program. This and the question whether or not the program will be adequate to the workers, motivated our proposal. It is certainly true that the program was conceived to embrace not only productivity, but also better working conditions to the harvesters. But what do they think about it? The objective of this study is to evaluate the Cana Limpa Program from the point of view of the harvester, and analyze its strengths and weaknesses as well as the need for improvements. Even though man participates in various stages of the sugar and alcohol production process, this study focus only on the harvest of sugar cane. The method used in this research is twofold: the first part is qualitative and exploratory. We aimed at obtaining variables to evaluate the program; the second part is quantitative and descriptive, that is, we measurehow many times the variables occur. During this part of the research, we built an instrument to collect data, with closed questions and ordinal scale. The questionnaires were distributed to the harvesters in their place of work. Evaluating the Cana Limpa program with an ordinal scale, as we did during the second part of this study, with three discrete levels (better than, equal to, worse than) allowed us, by means of descriptive statistics, to obtain the distribution of each one of these... (Complete abstract click electronic access below)
8
Alegranci, Pâmela [UNESP]. "Polimorfismo da haptoglobina correlacionado com doença arterial coronariana." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/93120.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:26:19Z (GMT). No. of bitstreams: 0
Previous issue date: 2008-08-14Bitstream added on 2014-06-13T19:54:31Z : No. of bitstreams: 1
alegranci_p_me_arafcf.pdf: 321277 bytes, checksum: 8ff505ee7ecdc73407004d69bb62d3b8 (MD5)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Universidade Estadual Paulista (UNESP)
A haptoglobina é uma glicoproteína plasmática sintetizada principalmente pelo fígado com atividade antioxidante e imunomodulatória. Sua principal função é a formação de um complexo estável com a hemoglobina livre, prevenindo a excreção de ferro pelos rins e danos causados pelo efeito oxidativo do mesmo. O polimorfismo desta proteína é caracterizado por três genótipos principais: Hp1 / Hp1, Hp2 / Hp1 e Hp2 / Hp2, sendo que estes apresentam subtipos na dependência das recombinações entre os alelos Hp1F, Hp1S, Hp2FS, Hp2SF, Hp2FF e Hp2SS. Apesar de contraditório, vários autores tentam correlacionar esses tipos e subtipos com doenças, na tentativa de responsabilizar algum deles como facilitador ou conferir resistência quanto às mesmas. Os objetivos deste estudo foram verificar as freqüências desse polimorfismo, suas freqüências alélicas e possíveis correlações em portadores e não portadores de doença arterial coronariana, bem como em doadores de sangue, pertencentes a uma parcela da população paulista. Dessa forma foram analisados 125 pacientes com DAC, 69 com ausência de DAC e 124 doadores de sangue. O material genético foi extraído, amplificado e após restrição enzimática com Dra I permitiu identificar os tipos e subtipos da haptoglobina. Os resultados permitiram concluir que essa caracterização pela técnica aplicada mostrou ser rápida e de fácil realização. Os portadores de DAC e os doadores de sangue evidenciaram maior freqüência do Hp2 / Hp2 e aqueles com ausência de DAC do genótipo heterozigoto, não sendo observada diferenças estatísticas significativas entre eles. Essa mesma observação era verificada quando estratificávamos os grupos quanto aos sexos. A freqüência alélica do Hp2 se mostrou maior que o Hp1 para os três grupos analisados. A distribuição dos subtipos da haptoglobina revelou que o prevalente...
Haptoglobin is a glycoprotein synthesized by liver with antioxidant and immunomodulatory properties. Its main function is the formation of a stable complex with free hemoglobin, preventing iron loss and damage caused by oxidative effects. The polymorphism of this protein is characterized by three main genotypes: Hp1 / Hp1, Hp2 / Hp1 e Hp2 / Hp2, and these have subtypes in dependence of the recombination among the alleles Hp1F, Hp1S, Hp2FS, Hp2SF, Hp2FF e Hp2SS. Despite contradictory, the authors try to associated types and subtypes with diseases, attempt to hold responsible for someone or to permit resistance to them. The purposes of our study were to find the frequencies of this polymorphism, their allelic frequencies and possible associations in patients with coronary artery disease and patients without coronary artery disease, as well as in blood donors, from one fraction of Brazilian population. We have analyzed 125 patients with CAD, 69 patients without CAD and 124 blood donors. Genomic DNA was extracted, amplified and after enzyme restriction with Dra I we could identify types and subtypes of haptoglobin. With the results we conclude that this applied technique is fast and it’s easy to carry out. Patients with CAD and blood donors evidenced higher frequencies for Hp2 / Hp2 and patients without CAD from heterozygous genotypes, weren’t observed significant statistical differences among them. The same observation was verified when we stratified the groups regarding genders. The allelic frequency of Hp2 was shown higher than Hp1 for the three groups analyzed. The distribution of haptoglobin subtypes revealed that the prevalent for all groups were represented by Hp2FS / Hp2FS, followed by Hp2FS / Hp1F in patients with CAD and without CAD and Hp2FF / Hp2FF in blood donors. The third in expression was represented by Hp1S / Hp1S in patients with CAD, Hp2FS / Hp1S in patients without...(Complete abstract click electronic access below)
9
Dias, Evandro Pereira [UNESP]. "Política e democracia em Steban Echeverría (1830-1851)." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/93220.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:26:21Z (GMT). No. of bitstreams: 0
Previous issue date: 2011-03-24Bitstream added on 2014-06-13T20:54:41Z : No. of bitstreams: 1
dias_ep_me_fran.pdf: 2067726 bytes, checksum: d46009ed43d04f6dfb71c5b9de1dd377 (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Através desta pesquisa, buscou-se realizar uma análise da concepção de democracia desenvolvida pelo intelectual argentino Esteban Echeverría, utilizando como fonte principal um manifesto político publicado em 1839 com o título de Código o Declaración de los Principios que Constituyen la Creencia Social de la República Argentina. Sua segunda edição, publicada em 1846, recebeu o nome pelo qual ficou mais conhecido, Dogma Socialista de la Asociación de Mayo ou simplesmente Dogma Socialista. Este manifesto traz os princípios políticos referentes ao pensamento democrático do autor e dos integrantes de seu grupo, a “geração de 1837”. As concepções deste autor foram analisadas em uma perspectiva de compreensão das estruturas de sociabilidade de suas idéias, ou seja, pretendeu-se contextualizá-las no processo de circulação de um ideário político comum ao referido grupo. Todos esses elementos estão relacionados ao contexto político, social e cultural do início do século XIX na América, mais especificamente na Argentina, em meio aos debates e lutas do período pós-independência.
Through this research, we attempted to perform an analysis of the intellectual conception of democracy developed by Argentine Esteban Echeverría, using as a main source political manifest published in 1839 under the title Código o Declaración de los Princípios que Constituyen la Creencia Social de la República Argentina. His second edition, published in 1846, received the name which he became best known, Dogma Socialista de la Associación de Mayo or just Dogma Socialista. This manifest has the political principles for the democratic thinking of the author and members of his group, the “generation of 1837”. The conceptions of his author have been analyzed from the perspective of understanding the structures of sociability from their ideas, or were intended to contextualize them in the progress of circulation of a common political ideal to the group. All these elements are related to political, social and cultural life of early nineteenth century in America, specifically Argentine, amid the debates and struggles of the post-independence period.
10
Grecco, Priscila Miraz de Freitas [UNESP]. "De uma máscara a outra: questões sobre a identidade em El laberinto de la soledad, de Octavio Paz." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/93320.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:26:34Z (GMT). No. of bitstreams: 0
Previous issue date: 2010-02-25Bitstream added on 2014-06-13T20:54:46Z : No. of bitstreams: 1
grecco_pmf_me_assis.pdf: 489626 bytes, checksum: c51266358929eceb036d669c65fb3489 (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A intenção deste trabalho é problematizar a idéia de identidade proposta em El laberinto de la soledad, livro de ensaios escrito pelo poeta e ensaísta mexicano Octavio Paz. Considerando que as idéias apresentadas nestes ensaios, sobre o que é ser mexicano, começaram a ser pensadas pelo autor em seus primeiros escritos, nos anos de 1930, sentimos necessidade de acompanhar sua trajetória desde esse período, passando pelas publicações de dos dois primeiros ensaios que o compõe, na revista mexicana Cuadernos Americanos, a partir de julho de 1949, sua primeira edição em livro, de 1950, até sua segunda edição revisada, em 1959. Durante esse percurso, abordaremos Paz como intelectual, e como tal, sua preocupação com a construção de uma imagem pública. Num segundo momento, nos centraremos na análise dos ensaios que compõe o livro. Acreditamos que acompanhando a gestação, produção e edições de El laberinto de la soledad, poderemos problematizar tanto a questão identitária, tema fortemente presente no pensamento da América Latina, através da análise da obra, como a questão do intelectual e sua vinculação aos temas de grande importância em seu momento histórico, político e cultural, através do caso particular de Octavio Paz
The intention of this research is to question the idea of identity proposed by El Laberinto de la Soledad, essay book of the mexican poet and essayist Octavio Paz. Considering that the ideas of identity started its development at the first Octavio Paz writings from 1930 on, it is necessery to go with his trajetory until the year of 1959, going through two essays that makes part of the Laberinto, which was publisched at the mexican magazine Cuadernos Americanos (from 1949 on) and reaching the book first edition in 1950. During this route, we will deal with the trajetory of Paz as an intelectual, so with his cares about the construction of a public image. After that we will focus on the essay analisis that consists the work. We belive that going with El Laberinto de la Soledad gestation, production and edition we could question as the identity problem as his link like an intelectual with the great themes of his historical, political and cultural age
Books on the topic "93D20"
1
Srirama, Satish Narayana, Jerry Chun-Wei Lin, Raj Bhatnagar, Sonali Agarwal, and P. Krishna Reddy, eds. Big Data Analytics. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-93620-4.
Full text
2
Tavares, João Manuel R. S., João Paulo Papa, and Manuel González Hidalgo, eds. Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-93420-0.
Full text
3
Jazar, Reza N. Theory of Applied Robotics. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-93220-6.
Full text
4
Noble, Eduardo. The Rise and Fall of the German Combinatorial Analysis. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-93820-8.
Full text
5
Brökelmann, Jost. Ambulantes Operieren — Der neue Weg in der Gynäkologie. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-93520-6.
Full text
6
Tietze, Jürgen. Übungsbuch zur Finanzmathematik. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-93920-3.
Full text
7
Kurp, Matthias. Lokale Medien und kommunale Eliten. Wiesbaden: VS Verlag für Sozialwissenschaften, 1994. http://dx.doi.org/10.1007/978-3-322-93520-5.
Full text
8
Becker, Jörg, and Susanne Bickel. Datenbanken und Macht. Wiesbaden: VS Verlag für Sozialwissenschaften, 1992. http://dx.doi.org/10.1007/978-3-322-93620-2.
Full text
9
Büschgen, Hans E., and Oliver Everling, eds. Handbuch Rating. Wiesbaden: Gabler Verlag, 1996. http://dx.doi.org/10.1007/978-3-322-93020-0.
Full text
10
Todd, Philip H. Intrinsic Geometry of Biological Surface Growth. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-93320-2.
Full textBook chapters on the topic "93D20"
1
Tietze, Jürgen. "Voraussetzungen und Hilfsmittel." In Übungsbuch zur Finanzmathematik, 3–22. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-93920-3_1.
Full text
2
Tietze, Jürgen. "Testklausuren Aufgaben." In Übungsbuch zur Finanzmathematik, 125–72. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-93920-3_10.
Full text
3
Tietze, Jürgen. "Exponentielle Verzinsung (Zinseszinsrechnung)." In Übungsbuch zur Finanzmathematik, 23–40. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-93920-3_2.
Full text
4
Tietze, Jürgen. "Rentenrechnung und Äquivalenzprinzip." In Übungsbuch zur Finanzmathematik, 41–67. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-93920-3_3.
Full text
5
Tietze, Jürgen. "Tilgungsrechnung." In Übungsbuch zur Finanzmathematik, 69–79. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-93920-3_4.
Full text
6
Tietze, Jürgen. "Die Ermittlung des Effektivzinssatzes in der Finanzmathematik." In Übungsbuch zur Finanzmathematik, 81–98. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-93920-3_5.
Full text
7
Tietze, Jürgen. "Kursrechnung und Renditeermittlung bei festverzinslichen Wertpapieren." In Übungsbuch zur Finanzmathematik, 99–102. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-93920-3_6.
Full text
8
Tietze, Jürgen. "Aspekte der Risikoanalyse — das Duration-Konzept." In Übungsbuch zur Finanzmathematik, 103–5. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-93920-3_7.
Full text
9
Tietze, Jürgen. "Derivative Finanzinstrumente — Futures und Optionen." In Übungsbuch zur Finanzmathematik, 107–13. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-93920-3_8.
Full text
10
Tietze, Jürgen. "Investitionsrechnung." In Übungsbuch zur Finanzmathematik, 115–24. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-93920-3_9.
Full textConference papers on the topic "93D20"
1
"Frontmatter: Volume 9320." In SPIE BiOS. SPIE, 2015. http://dx.doi.org/10.1117/12.2197042.
Full text
2
Nunes, Matheus Henrique A., João Dallyson S. Almeida, Italo Francyles S. da Silva, and Geraldo Braz Júnior. "Detecção automática de doenças da visão em imagens de reflexo vermelho utilizando Deep Features e Ensemble." In Simpósio Brasileiro de Computação Aplicada à Saúde. Sociedade Brasileira de Computação - SBC, 2023. http://dx.doi.org/10.5753/sbcas.2023.229638.
Full textAbstract:
O Teste de Brückner, popularmente conhecido como o exame do reflexo vermelho, é um método simples e indolor de diagnóstico cujo objetivo é detectar patologias oculares. Observando o reflexo retiniano vermelho, com o auxílio de um equipamento chamado oftalmoscópio direto, é possível identificar características das estruturas internas do olho que podem indicar possíveis problemas de saúde ocular. Para identificar a presença de patologias em imagens de reflexo vermelho, essa metodologia utiliza descritores de características baseados em aprendizado profundo e classificadores. Os experimentos realizados utilizando a rede neural convolucional DeepLoc em conjunto com um ensemble dos classificadores Regressão Logística, Random Forest e SVM alcançaram uma acurácia de 93,20%, sensibilidade de 84,50% e especificidade de 93,20%.
3
Yescas, Miguel, Pierre Joly, and François Roch. "Thermal Aging Assessment and Microstructural Investigations of Alloy 52 Dissimilar Metal Welds for Nuclear Components." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93120.
Full textAbstract:
Abstract Dissimilar Metal Welds (DMW) are commonly found between the ferritic low alloy steel heavy section components and the austenitic stainless steel piping sections in nuclear power plants. In the EPR™ design which is the latest FRAMATOME Pressurized water reactor (PWR) these DMW involve a narrow gap technology with no buttering, and only one bead per layer of a nickel base alloy weld filler metal (Alloy 52). In order to assess the thermal aging performance of this relatively new narrow gap DMW design, a significant internal R&D program was launched some years ago. Several representative mock-ups were thoroughly characterized in the initial condition as well as in the thermal aged condition, up to 50,000 hours aging at 350°C. The characterisations were focused on the fusion line between the ferritic low alloy steel (LAS) and the nickel base alloy since a particular microstructure is present in this area, especially in the carbon depleted area of the Heat Affected Zone (HAZ) which is often regarded as the weak zone of the weld joint. Metallography, hardness, nanohardness, chemical analyses, and Atom Probe Tomography, as well as fracture toughness tests were carried out on different specimens in different thermal aging conditions. The results show that the fracture toughness behaviour in the ductile-brittle domain of the low alloy steel carbon depleted HAZ at the interface with the alloy 52 weld metal of the DMWs is excellent, even for a thermal ageing equivalent to 60 years at service temperature. This was found in spite of the carbon depleted zone of the HAZ, the variations of hardness, chemical composition, particularly the carbon gradients, and the thermal aging effect induced by phosphorous segregation at grain boundaries.
4
Park, Dong-Yeob, and James A. Gianetto. "Review of Tensile Strain Capacity Prediction Models for Strain-Based Design of Pipelines." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93220.
Full textAbstract:
Abstract In this paper, three tenile strain capacity (TSC) prediction models developed for strain-based design (SBD) of girth-welded pipelines were reviewed, together with a brief introduction of technical backgrounds of their development. Most TSC models rely on small-scale mechanical and fracture toughness measurements to estimate the TSC of pipelines. Hence, we surveyed published experimental and computational data to examine the transferability of small-scale fracture toughness measurements to large-scale pipe fractures. Lastly, some gaps and issues that were found from the review are proposed for improvement of TSC models for SBD. The critical issues found with current TSC models and SBD are (a) differences in strain measurement for full-scale pipe tests/simulations, (b) multiple crack tip opening displacement (CTOD) definitions, (c) no application of J-integral as a toughness parameter, (d) no consensus on failure criteria, and (e) inconsideration of thermal and natural strain aging effects.
5
Bolinder, Tobias, Dominique Moinereau, Patrick Le Delliou, Anna Dahl, and Jacques Besson. "European Project ATLAS+: Evaluation of a Shear Modified Gurson Model by Comparison to Experimental Fracture Tests on SENT Fracture Specimens." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93620.
Full textAbstract:
Abstract This paper will assess the capability of the shear modified Gurson model developed by Nahshon and Hutchinson which is used by Kiwa Inspecta within the ATLAS+ project. This is done by comparison to experimental results from SENT fracture tests performed by EDF and ARMINES. The procedure for parameter identification for the standard and shear modified Gurson model is also summarized. The work presented in this paper is part of Work Package 3 within the ATLAS+ project. WP3 focus mainly on ductile tearing predictions for large defects in components. Models exists to accurately predict ductile tearing and to consider phenomena such as stress triaxiality effects. These advanced models include local approach coupled models or advanced energetic approaches. However, there is a need to validate these models for use in industrial applications. This will be done within the ATLAS+ project by predicting the results of the large scale component tests where input to the models are given from small size laboratory specimens. Within the paper a description of the shear modified Gurson model is given, as developed by Nashson and Hutchinson [1]. Furthermore, the procedure in determining the material model parameters is discussed. To determine the material parameters for the shear modified Gurson model a uniaxial tensile test, a fracture test and shear tests are used. The material that is used is the ferritic steel WB 36 (15 NiCuMoNb 5) which will be used for the large scale component tests within the ATLAS+ project. The procedure is also evaluated by comparing predictions done with the shear modified Gurson model to experimental results from SENT specimens performed by EDF and ARMINES. A comparison of the capability in predicting the ductile tearing in the SENT experiments between the standard Gurson model and the shear modified Gurson model is also presented within the paper.
6
Riha, D. S., M. L. Kirby, J. W. Cardinal, L. C. Domyancic, J. M. McFarland, and F. W. Brust. "Probabilistic Risk Assessment of Aging Layered Pressure Vessels." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93720.
Full textAbstract:
Abstract The National Aeronautics and Space Administration (NASA) operates approximately 300 aging layered pressure vessels that were designed and manufactured prior to ASME Boiler and Pressure Vessel (B&PV) code requirements. In order to make decisions regarding the continued fitness-for-service of these non-code carbon steel vessels, it is necessary to perform a relative risk of failure assessment for each vessel. However, risk assessment of these vessels is confounded by uncertainties and variabilities related to the use of proprietary materials in fabrication, missing construction records, geometric discontinuities, weld residual stresses, and complex service stress gradients in and around the welds. Therefore, a probabilistic framework that can capture these uncertainties and variabilities has been developed to assess the fracture risk of flaws in regions of interest, such as longitudinal and circumferential welds, using the NESSUS® probabilistic modeling software and NASGRO® fracture mechanics software. In this study, the probabilistic framework was used to predict variability in the stress intensity factor associated with different reference flaws located in the head-to-shell circumferential welds of a 4-layer and 14-layer pressure vessel. The probabilistic studies predict variability in flaw behavior and the important uncertain parameters for each reference flaw location.
7
Hashidate, Ryuta, Takashi Onizawa, Takashi Wakai, and Naoto Kasahara. "A Proposal of Inelastic Constitutive Equations of Lead Alloys Used for Structural Tests Simulating Severe Accident Conditions." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93820.
Full textAbstract:
Abstract This paper studies inelastic stress-strain relationship equation and creep rupture equation and creep strain equation of 99%lead-1% antimony alloy. Under the severe accident conditions, structural materials of nuclear power plants are subjected to excessive high temperature. Although it is very essential to clarify how the structure collapses under the severe accident conditions, there’re no experimental evidences of failure modes and the failure mechanisms in such high temperatures are not clarified. However, it is very difficult and expensive to perform structural tests using actual structural materials, such as austenitic stainless steels. Therefore, the authors propose to use lead alloys instead of actual structural materials. Because the strength of such alloys is much poorer than that of the actual structural materials, failure can be observed at much low temperature and by much small load. For demonstration of analogy between the failure mechanisms of lead alloy structure at low temperature and those of the actual structures at extremely elevated temperature, numerical analyses are required. The authors proposes inelastic constitutive equations of lead alloy based on a series of material tests. Nonlinear numerical analyses, e.g. finite element analyses, can be performed using the proposed equations.
8
"Tax Preferences of Resource Regions and the Risk to the Federal Budget." In The Second Eurasian RISK-2020 Conference and Symposium. AIJR Publisher, 2020. http://dx.doi.org/10.21467/abstracts.93.20.
Full text
9
Veil, John A., and John Quinn. "Performance of Downhole Separation Technology and Its Relationship to Geologic Conditions." In SPE/EPA/DOE Exploration and Production Environmental Conference. Society of Petroleum Engineers, 2005. http://dx.doi.org/10.2118/93920-ms.
Full text
10
Sahimi, M., M. R. Rasaei, F. Ebrahimi, and M. Haghighi. "Upscaling of Unstable Miscible Displacements and Multiphase Flows Using Multiresolution Wavelet Transformation." In SPE Reservoir Simulation Symposium. Society of Petroleum Engineers, 2005. http://dx.doi.org/10.2118/93320-ms.
Full text