Literatura académica sobre el tema "PISA latex"
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Artículos de revistas sobre el tema "PISA latex"
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Boussiron, Charlène, Mickaël Le Bechec, Julia Sabalot, Sylvie Lacombe y Maud Save. "Photoactive rose bengal-based latex via RAFT emulsion polymerization-induced self-assembly". Polymer Chemistry 12, n.º 1 (2021): 134–47. http://dx.doi.org/10.1039/d0py01128b.
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Kim, Hyun Jin, Fumi Ishizuka, Rhiannon P. Kuchel, Yin Yao, Shunsuke Chatani, Hiroshi Niino y Per B. Zetterlund. "Polymer film synthesis from an aqueous latex of polymerization-induced self-assembly (PISA) derived nanofibers". European Polymer Journal 193 (julio de 2023): 112118. http://dx.doi.org/10.1016/j.eurpolymj.2023.112118.
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Joumaa, Ahmad, Florence Gayet, Eduardo J. Garcia-Suarez, Jonas Himmelstrup, Anders Riisager, Rinaldo Poli y Eric Manoury. "Synthesis of Nixantphos Core-Functionalized Amphiphilic Nanoreactors and Application to Rhodium-Catalyzed Aqueous Biphasic 1-Octene Hydroformylation". Polymers 12, n.º 5 (12 de mayo de 2020): 1107. http://dx.doi.org/10.3390/polym12051107.
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A latex of amphiphilic star polymer particles, functionalized in the hydrophobic core with nixantphos and containing P(MAA-co-PEOMA) linear chains in the hydrophilic shell (nixantphos-functionalized core-crosslinked micelles, or nixantphos@CCM), has been prepared in a one-pot three-step convergent synthesis using reversible addition-fragmentation chain transfer (RAFT) polymerization in water. The synthesis involves polymerization-induced self-assembly (PISA) in the second step and chain crosslinking with di(ethylene glycol) dimethacrylate (DEGDMA) in the final step. The core consists of a functionalized polystyrene, obtained by incorporation of a new nixantphos-functionalized styrene monomer (nixantphos-styrene), which is limited to 1 mol%. The nixantphos-styrene monomer was synthesized in one step by nucleophilic substitution of the chloride of 4-chloromethylstyrene by deprotonated nixantphos in DMF at 60 °C, without interference of either phosphine attack or self-induced styrene polymerization. The polymer particles, after loading with the [Rh(acac)(CO)2] precatalyst to yield Rh-nixantphos@CCM, function as catalytic nanoreactors under aqueous biphasic conditions for the hydroformylation of 1-octene to yield n-nonanal selectively, with no significant amounts of the branched product 2-methyl-octanal.
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Huiyun, Li, Wang Yanglitao y Wu Xintian. "Chinese basic education and experience from three regions (Shanghai, Guangdong, Sichuan)". Köz-gazdaság 15, n.º 4 (30 de diciembre de 2020): 117–33. http://dx.doi.org/10.14267/retp2020.04.10.
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Basic education is the foundation for people to gain more knowledge in the process of growing up and living. High buildings rise from the ground. What does basic education exert to cultivate the people is the foundation for building a house. Therefore, basic education is such an impor-tant and basic project to improve the quality of people. Since China’s reform and opening and the re-introduction of the college entrance examination in the late 1970s, basic education has continuously improved and developed with more and more attention. China started to participate in the Program for International Students Assessment PISA5 in 2009. Up to now, China has par-ticipated in four sessions of PISA with relatively good grades6. The results of the PISA can help to examine the education quality, fairness and development efficiency, establish and improve an education monitoring indicator system, and promote education reforms for both China and the other countries in the world. The progress of China’s basic education and education with Chinese characteristics has contributed to China’s all-round development, which also provided references for other countries. In the meantime, PISA’s analysis of China and other countries also reflect the parts of China’s basic education that need to be promoted and emphasized.
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Araujo, Luisa, Andrea Saltelli y Sylke V. Schnepf. "Do PISA data justify PISA-based education policy?" International Journal of Comparative Education and Development 19, n.º 1 (13 de febrero de 2017): 20–34. http://dx.doi.org/10.1108/ijced-12-2016-0023.
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Purpose Since the publication of its first results in 2000, the Programme for International Student Assessment (PISA) implemented by the OECD has repeatedly been the subject of heated debate. In late 2014 controversy flared up anew, with the most severe critics going so far as to call for a halt to the programme. The purpose of this paper is to discuss the methodological design of PISA and the ideological basis of scientific and policy arguments invoked for and against it. Design/methodology/approach The authors examine the soundness of the survey methodology and identify the conflicting interpretations and values fuelling the debate. Findings The authors find that while PISA has promoted the focus on the important subject of children's education worldwide there are legitimate concerns about what PISA measures, and how. The authors conclude that the OECD should be more transparent in the documentation of the methodological choices that underlie the creation of the data and more explicit about the impact of these choices on the results. More broadly, the authors advise caution in the attempt to derive and apply evidence-based policy in the domain of education; the authors furthermore propose an alternative model of social inquiry that is sensitive and robust to the concerns of the various actors and stakeholders that may be involved in a given policy domain. Originality/value The issues and tensions surrounding the PISA survey can be better understood in the framework of post-normal science (PNS), the application of which to the PISA controversy offers a potential solution to a stalemate.
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Paganelli, Jacopo. "Il soggiorno di Caterina da Siena a Pisa nel 1375". Quellen und Forschungen aus italienischen Archiven und Bibliotheken 103, n.º 1 (1 de noviembre de 2023): 203–30. http://dx.doi.org/10.1515/qufiab-2023-0012.
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Abstract This essay aims to shed light on the period spent by Catherine of Siena in Pisa during the year 1375. Catherine was not only a woman of faith and devotion, but also a leading political player in late 14th-century Tuscany, in direct contact with the Apostolic See through the members of her clique. Why did the lord of Pisa, Pietro Gambacorta, summon her to his city? What networks of relations did Catherine’s arrival fit into? What were the tangible consequences of her stay in Pisa?
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Rahmi, Fathur, Iltavia Iltavia y Ramzil Huda Zarista. "Mathematical Literacy of Junior High School Students in Solving Problems PISA in Minang Context". JTAM (Jurnal Teori dan Aplikasi Matematika) 6, n.º 4 (8 de octubre de 2022): 1112. http://dx.doi.org/10.31764/jtam.v6i4.10221.
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Often the use of repeated questions and answers is given by the teacher so that they cannot analyze students' mathematical literacy abilities. There needs to be a solution to the PISA problem so that student competencies can be seen clearly. The teacher should analyze this so that it does not happen continuously so that a way can be found to overcome it. The purpose of this study was to determine the mathematical literacy of junior high school students when working on PISA questions in the Minang context. This type of research is descriptive qualitative research. The results of the PISA test and interviews became the data in this study. To find out more detailed data, the authors took the research subjects based on the results of the PISA test later and categorized the subjects into the highest, medium and lowest. In this study, researchers used indicators of mathematical literacy level according to PISA. The results of this study indicate that in formulating the situation mathematically is 75%, reasoning 33.05% and solving problems 14.44%. That is, on average, students are only able to answer problems only up to level 2 PISA, that the ability to formulate situations mathematically.
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Gutierrez, F., C. Losada, M. López, C. Rozados, J. M. Olivares, M. Calado y C. Cinos. "Pysa syndrome: a case report". European Psychiatry 26, S2 (marzo de 2011): 1243. http://dx.doi.org/10.1016/s0924-9338(11)72948-0.
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Pisa syndrome is known to be a condition in which there is sustained involuntary flexion of the body and head to one side and slight rotation of the trunk so the person appears to lean like the Leaning Tower of Pisa.The development of Pisa syndrome is most commonly associated with prolonged treatment with antipsychotics. Although less frequently, Pisa syndrome has been reported, in patients who are receiving other medications (such as cholinesterase inhibitors and antiemetics), in those not receiving medication (idiopathic Pisa syndrome) and also patients with neurodegenerative disorders like Alzheimer's disease and multiple system atrophy.We report a case of a 67 year- old male diagnosed with Schizophrenia for 20 years. He has been following a treatment with Clozapine 400 mg/day for 4 years. Amisulpiride was added to the established regimen of antipsychotic and increased during the last month reaching the doses of 600 mg/day. Three weeks later he was observed walking with a tilt toward the right. A first physical examination revealed sustained tonic flexion of the trunk to the right side. No deficits or mental status changes during neurological exploration were shown. We prescribed biperidene hydrochloride therapy. After 24 hour side effects disappeared.As far as we know, no many cases of amisulpride-induced Pisa syndrome in the literature have been reported. This abstract presents a case of amisulpride induced Pisa syndrome.
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Xu, Peng. "Editing Pipa Ji for the Late Ming Popular Theater: The Identity of the "Singing Hermit" and His Editorial Work". Late Imperial China 41, n.º 1 (2020): 159–201. http://dx.doi.org/10.1353/late.2020.0003.
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Cozzi, Elisa. "P. B. Shelley, George William Tighe, and the Irish Roots of ‘The Sensitive-Plant’". Romanticism 30, n.º 1 (abril de 2024): 42–55. http://dx.doi.org/10.3366/rom.2024.0627.
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This essay investigates the literary exchanges between the Irish poet and agronomist George William Tighe and Percy Bysshe Shelley in Pisa, where the former lived with Margaret King Mount Cashell, alias ‘Mrs Mason’, a radical Irish writer and former pupil of Mary Wollstonecraft. After moving to Pisa in 1820, Shelley began daily visits to the Mason-Tighe household, sourcing from Tighe's library a wealth of reading material on agricultural chemistry and botany, alongside Irish political and historical titles. Tighe's previously unexamined papers showcase his interests in Irish and Italian literature, republicanism, botany, and agriculture and reveal his links with the Lunar Society of Birmingham. Taking as a case study the first poem Shelley composed in Pisa, I argue that Tighe's agricultural pursuits shaped Shelley's political and botanical imagination in ‘The Sensitive-Plant’ and exerted a significant influence on Shelley's later poetry as a whole.
Tesis sobre el tema "PISA latex"
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Beaugendre, Maxime. "Etude et développement de latex vitrimères obtenus par PISA". Electronic Thesis or Diss., Université Paris sciences et lettres, 2023. http://www.theses.fr/2023UPSLS003.
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La chimie covalente dynamique est un outil efficace pour développer des matériaux polymères qui répondent aux enjeux écologiques actuels (recyclabilité, réparabilité). Nous avons implémenté la liaison imine dans des films de latex synthétisés selon les concepts PISA (Polymerization-Induced Self-Assembly). Les particules de latex sont constituées d’une écorce hydrophile de PMAA et d’un cœur hydrophobe de MMA, BA et d’un monomère porteur d’une fonction pendante benzaldéhyde (B). La réticulation imine des latex est réalisée à l’étape de séchage par ajout d’une diamine. L’étude de ces films montrent que leurs propriétés mécaniques et vitrimères sont limitées par (i) une réticulation permanente qui apparait au cours de la polymérisation en raison de réactions de transfert du monomère BA activées par le monomère B et (ii) la percolation des écorces de PMAA, polaires et rigides, qui restreignent la coalescence des particules. Pour pallier ces difficultés, le monomère BA a été remplacé par le monomère EHMA. Les films obtenus ont des propriétés mécaniques comparables au système initial et sont solubles. Dans une autre étude, le macro-agent RAFT ionique PMAA a été remplacé par un agent non ionique, le PNAM. Les propriétés thermo-mécaniques et la remise en forme à chaud de ces films sont nettement améliorées, démontrant ainsi que la nature ionique de l’écorce est un frein à l’obtention de revêtements performants et durables. Enfin, nous avons montré l’efficacité de liens uréthane vinylogue pour leur apporter aux films une résistance au fluage (double réticulation), notamment aux hautes températures quand les réactions d’échange des imines sont rapidesDynamic covalent chemistry is an efficient tool to develop polymeric materials that respond to current ecological issues (recyclability, repairability). We have implemented imine bonds in latex films synthesized according to PISA concepts (Polymerization-Induced Self-Assembly). The latex particles consist of a hydrophilic shell of PMAA and a hydrophobic core of MMA, BA and a monomer bearing a benzaldehyde pendant function (B). The imine cross-linking of the latexes is achieved at the drying stage by adding a diamine. The characterization of these films shows that their mechanical and vitrimeric properties are limited by (i) a permanent cross-linking which appears during the polymerization due to transfer reactions of the BA monomer activated by the B monomer and (ii) the percolation of the polar and rigid PMAA shells, which restrict particules coalescence. To overcome these issues, the BA monomer was replaced by the EHMA monomer. The new films have mechanical properties comparable to the initial system and are soluble. In another study, the ionic RAFT macro-agent PMAA was replaced by a non-ionic agent, PNAM. The thermo-mechanical properties and the reprocessing of these films are significantly improved, thus demonstrating that the ionic nature of the shell is a hindrance to obtain efficient and durable coatings. Finally, we have shown the efficiency of vinylogous urethane bonds to provide creep resistance to the films (double cross-linking), especially at high temperatures when the imine exchange reactions are fast
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Griveau, Lucie. "Emulsion polymerization in the presence of reactive PEG-based hydrophilic chains for the design of latex particles promoting interactions with cellulose derivatives". Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1329/document.
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Dans cette thèse, des particules de polymère fonctionnalisées en surface avec des groupes poly (éthylène glycol) (PEG) ont été synthétisées pour favoriser leur interaction avec les dérivés cellulosique via liaisons hydrogène intermoléculaires. Deux voies de synthèse ont été proposées pour obtenir ses composites cellulose/latex.La première voie est basée sur l'auto-assemblage induit par polymérisation (PISA) pour former des nanoparticules fonctionnalisées avant leur adsorption sur un substrat cellulosique. La PISA tire profit de la formation de copolymères blocs amphiphiles dans l'eau en combinant la polymérisation en émulsion avec les techniques de polymérisation radicalaire contrôlées (RDRP). Ces dernières sont utilisées pour synthétiser des polymères hydrophiles agissant à la fois comme précurseur pour la polymerization en émulsion d'un monomère hydrophobe, et comme stabilisant des particules de latex obtenues. Deux techniques de RDRP ont été étudiées : les polymérisations RAFT et SET-LRP. Des polymères hydrophiles à base de PEG de faible masse molaire ont été synthétisés en utilisant ses deux techniques qui sont ensuite utilisés pour la polymérisation d'un bloc hydrophobe dans l'eau. Le transfert de l'agent de contrôle au site de la polymérisation était difficile en utilisant la SET-LRP en émulsion, conduisant à la formation de larges particules. En utilisant la RAFT en émulsion, des particules nanométriques ont été obtenues, avec un changement morphologique observé en fonction de la taille du segment hydrophobe, puis adsorbées sur des nanofibrilles de cellulose (CNF).La seconde voie utilise la polymérisation en émulsion classique réalisée en présence de nanocristaux de cellulose (CNC) conduisant à une stabilisation Pickering des particules de polymère. L'interaction cellulose/particule est assurée grâce à l'ajout d’un comonomère à type PEG. Une organisation a été visualisé dans laquelle plusieurs particules de polymère recouvrent chaque CNCIn this thesis, polymer particles surface-functionalized with poly(ethylene glycol) (PEG) groups were synthesized to promote their interaction with cellulose derivatives via intermolecular hydrogen bond. Two synthetic routes were proposed to obtain such cellulose/latex composites.The first route was based on the polymerization-induced self-assembly (PISA) to form functionalized polymer nanoparticles prior to adsorption onto cellulosic substrate. PISA takes advantage of the formation of amphiphilic block copolymers in water by combining emulsion polymerization with reversible-deactivation radical polymerization (RDRP) techniques. The latter were used to synthesize well-controlled hydrophilic polymer chains, acting as both precursor for the emulsion polymerization of a hydrophobic monomer, and stabilizer of the final latex particles. Two RDRP techniques were investigated: reversible addition-fragmentation chain transfer (RAFT), and single electron transfer-living radical polymerization (SET-LRP). Low molar mass PEG-based hydrophilic polymers have been synthesized using both techniques, used for the polymerization of a hydrophobic block in water. The transfer of controlling agent at the locus of the polymerization was challenging for SET-LRP in emulsion conditions leading to surfactant-free large particles. Nanometric latex particles were obtained via RAFT-mediated emulsion polymerization, with morphology change from sphere to fibers observed depending on the size of the hydrophobic segment, which were then able to be adsorbed onto cellulose nanofibrils (CNFs).The second route used conventional emulsion polymerization performed directly in presence of cellulose nanocrystals (CNCs) leading to Pickering-type stabilization of the polymer particles. Cellulose/particle interaction was provided thanks to the addition of PEG-based comonomer. Original organization emerged where CNCs were covered by several polymer particles
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Černý, Lukáš. "Konverze prezentací mezi platformou LaTeX a Microsoft Power Point". Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2011. http://www.nusl.cz/ntk/nusl-236985.
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This work deals with theoretical and practical basis for the creation of converter between LaTeX and Microsoft PowerPoint presentations. It discusses the use of LaTeX and the Beamer class for presentations, programmatic creation of PowerPoint documents using PowerPoint Primary Interop Assemblies and PresentationML. It outlines the use of the scanners and parsers generators GPLEX and GPPG respectively. It deals with the characteristics of today's tools for document conversion. And finally deals with the particular pitfalls of the design, implementation and testing of the application for conversion of documents between LaTeX platform and Microsoft PowerPoint.
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CHUNG, CHI-FANG y 鐘琦芳. "An Analysis and Interpretation of Lee Bo-Chen’s Late Autumn For Pipa and Piano". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/494jwx.
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碩士國立臺北藝術大學
傳統音樂學系碩士班
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During recent years, Chinese composer Li Bo-Chan has been an active figure in the field of Chinese Orchestra in Taiwan and China, winning numerous awards of international composition competitions. In this thesis, I’d like to investigates his first piece of work composed for Pipa and piano, Late Autumn, commissioned in 2014 by Pipa performer Zhang Ya-Di for The Best of the Best Concert (BOB). This number is of arch structure with Coda part that creates beautiful melody and distinct use of chord comparing to other numbers of Pipa. The performer can thus communicate the sorrow and sentimentality of the departure of Fall through each note. This thesis includes music analysis, interviews and musical interpretation. First, through collecting literature and interviews, I develop understandings of Li’s ideas of music composition and his philosophy of music. Then I utilize music analysis to examine the section and chord arrangement of Late Autumn to explore its aesthetics of music.
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Tseng, Tzu-Ching y 曾紫晴. "Research on the performance arts and techniques for the Vietnamese pipa since the late 19th century". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/71012735850942789978.
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碩士國立臺北藝術大學
傳統音樂學系碩士班演奏組
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According to the historical records, the Vietnamese was affected by Chinese culture for up to two thousand years, especially after "The Canonized System" during the Ming Dynasty, the output of large-scale cultural phenomenon was even more obvious. Experiencing the revolution of dynasties, the Vietnamese pipa was circulating in Ming Dynasty, has six hundred years of heritage and development. From the introduction of the "Bent-neck pipa", developed to "Vietnamese pipa", which is commonly use in Vietnam, has obviously its own characteristics and stand out in Vietnamese society. In this paper, in addition to the introduction and conclusion, the study divided into four parts: firstly, explore the historical documents from the history fortune of spread to Vietnamese pipa and further understanding of the status in the Vietnamese community which was affected by the Vietnamese Culture. Secondly, the Vietnamese pipa instrument itself, structure with shapes, melody, music and other issues to sort out the inheritance and development of its instruments; Thirdly, to analyze the various regional classic tracks, roughly summed up northern, central and southern regions of the source materials and style tunes with further proposed musical interpretation techniques. Finally, according to the author''s experience of learning to play, elaborate Vietnamese pipa the basic holding posture and the playing method, and on the left hand and right hand playing techniques, in-depth dialysis essence of traditional Vietnamese music playing. Pertaining to Vietnamese pipa playing method related research, no more abundant than Chinese pipa literature. I hope the subject by discussing, enable pipa artists or music circle academia students can pay more attention to the pipa family members in Vietnam, thus providing multi-oriented traditional Vietnamese music, providing interpretation and performance analysis techniques applied fairly.
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Springer, Victoria Suzanne. "Late Pleistocene Neandertal-Early Modern Human Population Dynamics: The Dental Evidence". Thesis, 2013. http://hdl.handle.net/1969.1/149499.
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Recent genetic studies have confirmed that there was admixture between African early modern humans and archaic populations throughout the Old World. In this dissertation, I examine European early modern human dental morphology to assess the evidence for Neandertal-human admixture. The focus of this study is not on the question of taxonomic designations of Late Pleistocene Homo, but rather on the interactions of these populations in Europe. This focus on gene flow itself redefines the Neandertal question. Rather than asking if Neandertals are a different species from H. sapiens, I focus on the nature of the interactions between archaic and modern populations, which is essential to understanding the history of modern H. sapiens regardless of species definitions.
I recorded dental metric measurements and morphology observations on 85 fossil Neandertals and early modern humans and a recent modern human comparative sample of 330 Native Americans and Spaniards. I examined each trait distribution individually and through the use of Mahalanobis D2, mean measure of divergence, principle components analysis, discriminant function analysis, k-means cluster analysis, and a population genetics program, structure.
Through these methods, I found evidence of admixture in the dental trait distributions of European early modern humans. However, it is not evident in traditional distance measures or cluster analyses. The earliest European modern humans do not follow the trend of dental reduction found throughout the Pleistocene and into the Holocene and do not uniformly classify with any fossil population in discriminant function analysis of metric traits. The non-metric trait sample size is too small to make any definitive conclusions, but a mosaic pattern of trait frequencies also suggests admixture. The recent modern human sample shows that while increased variation and a mosaic of non-metric traits persist through many generations after admixture has ceased, traditional methods of distance analysis cannot detect low levels of admixture within 200 years. The program structure is effective in finding patterns of variation within and among populations using morphological data. It will be useful for future analyses of dental traits and other fossil data, given the ability to use it with an incomplete data set.
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Duarte, Marta Isabel Ricardo Marecos. "Vozes consoantes, Vozes dissonantes. Pina e Melo e a Cultura Literária do século XVIII: sujeito autoral, polémica e poéticas". Doctoral thesis, 2021. http://hdl.handle.net/10316/95454.
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Tese de doutoramento em Literatura de Língua Portuguesa, apresentada ao Departamento de Línguas, Literaturas e Culturas da Faculdade de Letras da Universidade de Coimbra.RESUMO Com o objetivo de revisitar o séc. XVIII no âmbito da historiografia literária através da obra de Francisco de Pina e Melo, este estudo entronca em dois marcos de análise a que se associam duas facetas distintas do autor: o poeta e o teorizador da literatura. De um lado, propõe-se o estudo da sobrevivência do legado barroco na sua mais significativa obra de poesia (As Rimas, 1726); do outro, o estudo do campo da doutrinação estética, em que assume relevo o diálogo com os modernos comentadores europeus da Poética e, na sua esteira, os críticos e intelectuais portugueses de meados de Setecentos. No intuito de questionar uma leitura sequencial da evolução das correntes estéticas, determinante na projeção de uma ideia de rutura no trânsito da cultura barroca para a da Ilustração (Mendes dos Remédios, Hernâni Cidade, Saraiva e Lopes, etc.), conferimos especial atenção à formação de paradigmas estéticos e de pensamento crítico no âmbito das academias literárias do séc. XVIII, assinalando o debate entre antigos e modernos espelhado na evolução das diferentes perspetivas que em certo momento se sobrepõem. Como tal, afigurou-se-nos relevante indagar acerca da associação do poeta montemorense com a forma mentis do novator. Em que argumentos se funda a reação anti-barroca que configura uma inovação no campo literário de meados do séc. XVIII, e de que modo esta é recebida pelos conservadores da velha ordem barroca estabelecida? Como se configuram a poesia e pensamento estético de Pina e Melo no seio do confronto entre códigos fundados sobre noções de estilo divergentes e, simultaneamente, diferentes conceções da herança clássica. De que modo o poeta responde, teoricamente, ao “novo gosto” neoclássico, e como procura adaptar a “simplicidade francesa” e os modelos do arcadismo na sua prática poética? Qual é o resultado desse esforço conciliatório, que coloca no centro das querelas da Ilustração dois tipos de conceção estrutural do poema épico, um assente na alegorese e varietas barroca, e outro fundado nos princípios aristotélicos de verosimilhança e unidade? Nas reações de Melo aos diferentes julgamentos dirigidos às suas obras, é possível delinear a formação de uma consciência autoral, paralela da caracterização que o poeta faz do seu próprio estilo literário, num contexto em que o receio de difamação pessoal surge especialmente em relevo e determina uma idealização tanto do poeta como do crítico. Analisaremos, neste domínio, também a emergência de diferentes tipos de crítica e de público. O estudo do livro d’As Rimas I, II e III permite-nos, por sua vez, entender especificidades do código barroco de influência gongórica em Portugal. Veremos como o tenebrismo fúnebre e a melancolia “negra” na lírica de Melo, a par de outros elementos estruturais, evidenciam a presença de um subjetivismo que surge associado à construção e projeção de uma imagem autoral marcada. À luz da poesia de Pina e Melo, pode dizer-se que a ênfase dada ao “estilo” e ao seu ornato, na lírica da 1.ª metade do séc. XVIII, se coaduna com a progressiva autonomização do campo literário na Europa moderna, traduzindo um trabalho que tem no horizonte uma singularização do autor, em busca de uma originalidade que lhe garanta um lugar de destaque no Parnaso. A problemática do autor afigura-se, pois, configuradora de um estudo que se propõe analisar as interações entre sujeito e instituição literária no quadro da sedimentação do pensamento moderno na literatura e cultura portuguesas, colocando em foco o jogo de espelhos patente no diálogo entre Melo e os seus críticos.
ABSTRACT This study’s objective is to revisit the eighteenth century’s Portuguese literary historiography through the work of Francisco de Pina e Melo by developing two frameworks of analysis that link two distinct aspects of the author: the poet and the literary theorist. From Francisco de Pina e Melo’s work as a poet, we pull his most significant contribution titled As Rimas, which was published in 1726 and survives as a prime example of Baroque literature. In exploring his work as a literary theorist, we will dig deep into the field of aesthetic indoctrination, as we review the dialogue of modern European poetics commentators and Portuguese critics which came in the wake of prominent mid-eighteenth century Portuguese intellectuals. In order to discuss a sequential reading of the evolution of the eighteenth century’s aesthetic movements that promotes the idea of a break in the transition from Baroque culture to that of Enlightenment (Mendes dos Remédios, Hernâni Cidade, Saraiva e Lopes, among others), we will base our inquiry in the form of aesthetic and critical thought paradigms within the literary academies, marking the debate between the old and the new mirrored in the evolution of the different perspectives that for a time overlapped. As such, it seems relevant to inquire into the relation between Pina e Melo and the novator’s mindset. It needs to be understood what the basis for the anti-baroque reaction is and in what terms it innovated the literary field of the mid-eighteenth century. Also, we need to consider how the anti-baroque reaction was received by the conservatives in the old established baroque order and how it shaped Melo’s poetry and aesthetic thought within the midst of confrontation between codes based on divergent notions of style and different conceptions of the classical heritage. Moreover, we intend to explored how the poet theoretically responded to the “new” classical taste and how he sought to adapt French simplicity and neoclassicism in his poetry. As the poet tries to reconcile these different influences, he creates something different, that can be understood in the context of Enlightenment’s quarrels over the structural conception of epic fiction; one based on the concept of Baroque allegory and Baroque varietas concept and the other based on the Aristotelian principles of verisimilitude and unity. As a reader, we can begin to see Melo’s authorial consciousness in reaction to the different criticisms directed at his work, and alongside this reaction to criticism his own characterization of his literary style, which, given the context, appears fearful of personal defamation and places a focus on building an idealized portrait of the poet and the critic. In connection to this, we will also analyze the emergence of different types of critics and audiences in regards to his work. The study of the book As Rimas I, II and III allows us to understand the nature of the Gongoric influence on the Baroque code in Portugal. We will see how funeral gloom and dark melancholy in Melo’s lyric poetry, along with other structural elements, are evidence of a subjectivism, which is connected with the building and projecting of a distinct authorial image. The emphasis given to ornate style and its grand embellishments in the Portuguese lyric poetry in the first half of the eighteenth century, which Melo was a well-known practitioner of, is consistent with the progressive autonomy of the literary field in modern Europe, preparing a path for future works which put the focus on the singularity of the author who was searching for an originality, what would guarantee him a prominent place in Parnassus. The author’s problem gives shape to a study whose purpose is to examine the interactions between the subject and the literary establishment in the context of the sedimentation of modern thought in Portuguese literature and culture, while placing a special focus on the game of smoke and mirrors which characterized the dialogue between Melo and his critics.
Libros sobre el tema "PISA latex"
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Kelly, Kathleen. A comparison of vigilance behaviour in magpies (Pica pica) during early morning and late afternoon feeding over winter and spring. [S.l: The author], 1997.
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Ni, Shu-Lan Miranda. The development of a genre: Pina Bausch and late twentieth-century dance theatre. Texas: Texas Tech. University, 2002.
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Zorzi, Andrea, ed. Conflitti, paci e vendette nell'Italia comunale. Florence: Firenze University Press, 2010. http://dx.doi.org/10.36253/978-88-6453-117-5.
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This book is a collection of seven essays with an introduction by the editor. The contributions propose first-hand studies of some of the less researched aspects of the history of the Italian communes: the practices of conflict, vendetta and pacification. The variety of different ways of resolving conflicts brought to light by the studies for the various civic and rural contexts (Mantua, Parma, Pisa, Lucca, Florence and the Valdinievole), between the beginning of the thirteenth and the mid fourteenth century, indicate how normal such social relations were, the widespread nature of the feud and the legitimisation and centrality of the culture of the vendetta within the political arena of the commune. The book hence offers a precious contribution for a review of the prevalent narration of the vendetta in late mediaeval Italian society.
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Dotto, Diego, Dávid Falvay y Antonio Montefusco. Le Meditationes Vitae Christi in volgare secondo il codice Paris, BnF, it. 115 Edizione, commentario e riproduzione del corredo iconografico. Venice: Fondazione Università Ca’ Foscari, 2021. http://dx.doi.org/10.30687/978-88-6969-509-4.
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The Pseudo-Bonaventuran Meditationes vitae Christi is one of the most influential devotional narratives of the late middle ages. It was written in Tuscany in the early fourteenth century and survived in several Latin and vernacular manuscripts and early prints. An extensive discussion has engaged the scholars, especially about the issue of the first linguistic version of the text. Even if the Latin version seems to be the original text, the vernacular manuscript Paris, BnF, it. 115 stays as one of the most important and interesting witnesses of the work. One of the earliest surviving codices, it conserves the first Italian translation (penned in the Pisan area) of the text, enriched by a wonderful set of illustration. The present volume, which is the outcome of an international and interdisciplinary collaboration, offers the first critical edition of the text, the reproduction of all images, the edition of the instructions given to the artist, accompanied by detailed philological and art-historical commentaries, glossaries, and seven interdisciplinary introductory essays.
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Ladić, Zoran. Last will: Passport to heaven : urban last wills from late medieval Dalmatia with special attention to the legacies Pro remedio animae and Ad pias causas. Zagreb: Srednja Europa, 2012.
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Urquízar-Herrera, Antonio. The Antiquarian Appropriation of Islamic Monuments. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198797456.003.0007.
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Chapter 6 focuses on three case studies: the appropriation of Córdoba Mosque as a classical edifice, the transformation of Seville Giralda into an antiquity, and, finally, the humanist reading of Toledo. Since in the latter the destruction of the Aljama Mosque had deprived the city of major Islamic buildings, it provides a useful example to explore the limits of antiquarian strategy (Francisco de Pisa, Pedro de Rojas, Cristóbal Lozano). Regarding Córdoba, Pablo de Céspedes’ theory about a section of the mosque actually being Roman is commented on. Regarding Seville, the common praise for the Giralda is analyzed upon its antiquarian description by Alonso Morgado, which was later copied and transformed by Rodrigo Caro.
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Everest, Kelvin. Keats and Shelley. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780192849502.001.0001.
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This chapter surveys the extent of Shelley’s fame and notoriety while he was alive. The period before his move to Italy in early 1818 were mainly isolated, but he was nevertheless known about in the privileged circles into which he was born, a landed aristocratic family, Eton, and Oxford. His eccentricity and strong views set him apart from his own class, but the extremity and free expression of his radicalism also alienated fellow-radicals. In poetic terms he was astute in recognising those contemporaries of lasting value. Specific attention is given to Wordsworth, Coleridge, and Thomas Moore. The years in Italy were also isolated except for the period of the ‘Pisan Circle’. Keats and Byron are importsant presence in Shelley’s later work, rather than overt influences.
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Lower, Michael. The Crusade Begins. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198744320.003.0005.
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King Louis IX of France departed on the Tunis Crusade in March 1270. The campaign was beset with challenges from the outset. Louis had contracted with the Genoese for an expeditionary fleet, but they were two months late delivering the boats. Bored and drunk crusaders rioted in the streets of Aigues‐Mortes as they waited out the long delay. When the crusade did set sail, it made for Cagliari on Sardinia rather than the Near East. Shocked by their arrival, the Pisan garrison that controlled the city at first refused the crusaders entrance inside its walls. At a council of war held on the king’s warship Montjoie, the decision to divert the crusade to Tunis was announced to a stunned rank and file. A peaceful port city was about to move from the periphery to the center of the history of the crusades.
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Cortese, Maria Elena. Between the City and the Countryside. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198777601.003.0013.
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The subject of this chapter is the relationship between the Tuscan cities and the families belonging to the middle ranks of the lay aristocracy, from the late tenth until the early twelfth century. Taking the case-study of Florence as a starting point, a comparison with other cities of the Tuscan March in the same period (Lucca, Pisa, Arezzo, Pistoia, and Siena) will be sketched, to see that during the eleventh century we can find a similar situation in different contexts. In fact almost everywhere the ‘mid-level’ aristocracy held extensive and dispersed landholdings, many castles and private churches in the countryside, but important urban and suburban holdings as well. They established political, social, and economic connections with the primary wielders of regional power (the marquis, the counts, the bishops and other important ecclesiastical institutions) and gravitated on the cities, taking part to urban politics and probably living there some periods during the year. The situation in Florence, however, rapidly changed during the protracted crisis of the Tuscan March at the end of the eleventh and in the early twelfth centuries, when the rural aristocracy confronted a major crisis: many lineages rapidly fragmented, the splintered branches concentrated on building compact rural lordships, and they turned their backs on Florence, without playing a role in the emerging comune. But, in the same context of the decline of the March, in other Tuscan cities the separation between rural and urban aristocracies did not take place, or at least seems to have been not so stark and dramatic. Paying attention to the strength of several factors (power of the bishops, economic attraction, connections with powerful counts families etc.), different situations will be compared to reflect about the political behaviour of rural aristocracies and their degree of integration in the urban elites during the so-called ‘consular period’.
Capítulos de libros sobre el tema "PISA latex"
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Gomendio, Montserrat y José Ignacio Wert. "6. Spain". En Dire Straits-Education Reforms, 245–68. Cambridge, UK: Open Book Publishers, 2023. http://dx.doi.org/10.11647/obp.0332.06.
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In Chapter 6 we describe our experience as policymakers in the Spanish Government, the political costs associated with approving and implementing an education reform at the peak of the financial crisis, and the goals and achievements of such a reform. We describe the underlying conflicts of interest for a broad range of stakeholders, and how these were obscured in the wider public debate. We discuss in detail why PISA’s conclusion that the Spanish education system has sacrificed excellence for the sake of equity is wrong, how it is used to justify mediocre results, and the consequences of such policy recommendations in terms of facilitating the reversal of reforms. We also raise the issue that PISA 2018 data for Spain was initially withdrawn and then released months later. We argue that PISA should be held accountable to countries demanding explanations and develop a hypothesis as to why changes in the methodology may have led to unreliable results.
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Lahelma, Elina. "Controversies and Challenges in the History of Gender Discourses in Education in Finland". En Finland’s Famous Education System, 257–72. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-8241-5_16.
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AbstractFinland is famous for high scores in PISA league tables as well as for high scores in gender equality indexes. Sometimes these two championships seem to be competing. Since the first PISA tests, an old concern for boys’ underachievement has received new emphasis and the gender gap in results has detracted from national pride in the excellent overall results, as well as hiding a growing social and ethnic gap. In the 1980s concern about underachieving boys in Finland was matched by efforts towards gender equality in education following global declarations and resolutions of gender equality after the United Nations’ Convention on the Elimination of All Forms of Discrimination against Women in 1979. Supported by the first equality projects, gender research in Finnish education took the first steps in the late 1980s. Since that time, gender researchers in education have collaborated in carrying out gender equality administration and projects. A constant task has been to challenge the simple juxtaposition of girls and boys that is sometimes evident in the concerns about boys’ achievements. In this chapter, I describe and analyse the interlinked histories of gender equality work, feminist studies in education, and the boy discourse, with reflections on changes and sustainability in Finnish education policies. The bodies of data include documents associated with gender equality projects, national PISA reports, reviews of research articles and PhD studies that draw on feminist research in education. I also use my own experience as an actor in the field since the early 1980s.
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Ansani, Fabrizio Antonio. "Le conseguenze economiche dell’innovazione bellica. La produzione di «artiglierie alla francese» a Firenze tra Quattro e Cinquecento". En L’economia della conoscenza: innovazione, produttività e crescita economica nei secoli XIII-XVIII / The knowledge economy: innovation, productivity and economic growth, 13th to 18th century, 195–208. Florence: Firenze University Press, 2023. http://dx.doi.org/10.36253/979-12-215-0092-9.13.
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The paper aims to assess the financial impact of the rapid assimilation of the French-style artillery into Italian warfare. The focus will be on the policy adopted by the Florentine Republic to improve the efficiency of its logistic system during the War of Pisa (1494-1509): through the analysis of public records, the research will highlight the significant transformations occurred in late medieval military industry, reevaluating the importance of the trade in strategic materials for the early modern economy and demonstrating the concerted effort made by the rising renaissance state to establish a monopoly on the manufacture of arms and «munitions».
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Bodner, Neta. "The Baptistery of Pisa and the Rotunda of the Holy Sepulchre: A Reconsideration". En Cultural Encounters in Late Antiquity and the Middle Ages, 95–105. Turnhout: Brepols Publishers, 2014. http://dx.doi.org/10.1484/m.celama-eb.5.103067.
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Poloni, Alma. "Putting Pressure on the Lord. The Fiscal Reforms of Pietro Gambacorta, signore of Pisa (1370–1392)". En Late Medieval and Early Modern Studies, 75–105. Turnhout, Belgium: Brepols Publishers, 2022. http://dx.doi.org/10.1484/m.lmems-eb.5.128600.
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Alberti, Antonio. "1. The City of Pisae from Late Antiquity to the Early Medieval Period". En Archaeological Landscapes of Late Antique and Early Medieval Tuscia, 21–37. Turnhout, Belgium: Brepols Publishers, 2023. http://dx.doi.org/10.1484/m.medito-eb.5.133991.
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Helbing, Mario Otto. "Mechanics and Natural Philosophy in Late 16th-Century Pisa: Cesalpino and Buonamici, Humanist Masters of The Faculty of Arts". En Mechanics and Natural Philosophy Before the Scientific Revolution, 185–93. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-5967-4_7.
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Poloni, Alma. "Politics, Institutions, and Society in Pisa during the Communal Era (Late Eleventh to Late Fourteenth Century)". En A Companion to Medieval Pisa, 139–62. BRILL, 2022. http://dx.doi.org/10.1163/9789004512719_008.
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Alberti, Antonio, Alessandro Costantini y Claudia Rizzitelli. "Pisa, Piazza del Duomo:". En LRCW 6: Late Roman Coarse Wares, Cooking Wares and Amphorae in the Mediterranean: Archaeology and Archaeometry, 438–48. Archaeopress Publishing Ltd, 2023. http://dx.doi.org/10.2307/jj.7193896.47.
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Petralia, Giuseppe. "The Late Middle Ages and the Florentine Conquest". En A Companion to Medieval Pisa, 163–83. BRILL, 2022. http://dx.doi.org/10.1163/9789004512719_009.
Texto completoActas de conferencias sobre el tema "PISA latex"
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PANCANI, Giovanni. "Integrated Digital Survey Methodologies for Late Medieval Fortifications in Tuscany: The Fortress of Malmantile". En Mediterranean Architectural Heritage. Materials Research Forum LLC, 2024. http://dx.doi.org/10.21741/9781644903117-38.
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Abstract. The “castle of Malmantile”, on the hills of Lastra a Signa, was built with the intention of strengthening the Florentine defenses against the rival city of Pisa. It represents one of the most interesting examples of late medieval fortification that has best preserved the entirety of the walls. It was originally built as a military outpost along the ancient road that connected Florence to Pisa. Following the downgrading of the military defense role, it became an inhabited center, a reference point for the surrounding fertile countryside. The data acquisition was carried out in three different survey campaigns, the first two carried out between 2009 and 2010 and the last, completed and updated, carried out in July 2018. The restitution work was carried out to give a complete representation of the place, its constructive characteristics and its state of conservation / decay. Exhaustive thematic maps have been extracted from the obtained documents, which have provided an adequate account of the conditions of the places.
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Chisalita, Oana y Carmen Cretu. "WHAT DO PISA 2012 RESULTS TELL US ABOUT EUROPEAN STUDENTS' ICT ACCESS, ICT USE AND ICT ATTITUDES?" En eLSE 2014. Editura Universitatii Nationale de Aparare "Carol I", 2014. http://dx.doi.org/10.12753/2066-026x-14-064.
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This study focuses on identifying the European students' access, use and attitudes towards Information and Communication Technologies (ICT) as reflected by the data gathered in 21 European countries during the 2012 Programme for International Student Assessment (PISA). ICT access, use and attitudes are important factors that support the integration of the technology in education. Analyzing students' answers in the ICT Familiarity Questionnaire, this paper highlights that there continues to exist an important gap regarding the access at the technology. The lack of access affects students' ICT attitudes. Moreover, students from countries with a low level of ICT access in school tend to start developing ICT competences later than the students from ICT front-runners countries. The lack of competences influences the students' activities either as a stand-alone game player, or a team member during collaborative games. However, when analyzing the internet use at the school and outside the school, whether it is used in order to communicate via the email or the social networks, these differences tend to fade away. Thus, since more than 50% of all students, regardless of the country of origin, access daily the social networks. Regarding the ICT attitudes, PISA 2012 results indicate that European students see the computer as a very important tool which supports their school learning and transform their homework. Moreover, two out of three European students use the internet to gather information in order to do their homework. Despite the positive attitudes mentioned above, an increased level of negative attitudes was noticed among the students from those countries with low level of ICT access.
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Bevilacqua, Marco Giorgio y Piergiuseppe Rechichi. "Le fortificazioni di terra delle mura medievali di Pisa nel XVII secolo. Analisi tecnico-militare del progetto di Gabriello Ughi". En FORTMED2024 - Defensive Architecture of the Mediterranean. Valencia: Universitat Politàcnica de València, 2024. http://dx.doi.org/10.4995/fortmed2024.2024.18058.
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From 1626, the modern age fortification of the medieval walls of Pisa, in Tuscany, started following an organic project by Gabriello Ughi that defined a new bastioned front composed of earthen ramparts, demilunes, faussebraies and cavaliers. The earthen-fortified front remained active until the last years of the 18th century; it was later demolished for reasons of public health, in the wider context of the demilitarization policies operated by Grand Duke Peter Leopold. Starting from the analysis of archival and iconographic sources, this paper shows the results of a study on the 17th century earthen fortified front, aimed at understanding forms, consistencies, and design choices in the light of Ughi’s cultural context and references. In particular, the study focuses on the analysis of the eastern front, where the project shows more interesting and articulated solutions due to the irregularities of the circuit of the pre-existing medieval walls.
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Kvizda, Boris, Alessandro Petruzzi y Francesco S. D’Auria. "Qualification and Uncertainty Evaluation of a Best Estimate Loca Study of the Mochovce NPP by RELAP5/3.2-Gamma and CIAU". En 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89203.
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The paper describes the work that has been done in cooperation between VUJE, Inc. (Slovakia) and University of Pisa (UNIPI, Italy). The aim was to evaluate Best Estimate Plus Uncertainty calculation (BEPU) of Mochovce Nuclear Power Plant WWER-440/213 (NPP) for the selected LOCA scenario utilizing the Code with the capability of Internal Assessment of Uncertainty (CIAU) developed at UNIPI. At the basis of CIAU, there is the Uncertainty Method based on Accuracy Extrapolation (UMAE) previously proposed by UNIPI. The project was considered as a full pilot BEPU application for WWER-440 type of unit in VUJE, Inc. that can be taken as a basis for utilization in licensing process later on. Project objectives are as follows: • To prove capability of available Mochovce NPP nodalization for RELAP5/3.2.2 gama to predict meaningful results for LOCA type accidents following UMAE procedure [1]. • To apply the CIAU [2, 3] to a LOCA transient selected for the Mochovce NPP and produce uncertainty bands for selected relevant parameters.
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Guyon, Olivier. "Imaging Earth-like planets around late-type stars with low-inner working angle PIAA coronagraphy". En SPIE Optical Engineering + Applications, editado por Stuart Shaklan. SPIE, 2013. http://dx.doi.org/10.1117/12.2025319.
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Bevilacqua, Marco Giorgio, Ewa Jolanta Karwaca, Valeria Mininno, Michele Angelo Perrone y Luisa Santini. "The Fortress of Ripafratta, Tuscany. A research project for its conservation and enhancement". En FORTMED2020 - Defensive Architecture of the Mediterranean. Valencia: Universitat Politàcnica de València, 2020. http://dx.doi.org/10.4995/fortmed2020.2020.11494.
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The fortress of San Paolino in Ripafratta (San Giuliano Terme, Tuscany, Italy), represents the main structure of the ancient Pisan Republic defensive system towards Lucca. The fortress is the product of several stratifications dating back to the tenth century. It was built in the years between 1162-1164; later on, starting from 1504, significant interventions of modernization were realized by the Florentine Government, probably following a project by Giuliano da San Gallo. Since the early seventeenth century, the fortress lost its military function and passed to private property. Nowadays, the fortress is in a deep state of degradation, even if since 2008 several initiatives has followed for its recovery, unfortunately without success. The paper aims to show the results of an interdisciplinary project for the enhancement of the fortress and its territory. Based on a careful territorial analysis and in-depth historical study, a mix of compatible functions was identified in order to maximize the use of the fortress in all the seasons. A feasibility study was also developed for verifying the economic sustainability of the whole project and identifying possible intervention phases.
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Scientific Committee, FORTMED. "Defensive Architecture of the Mediterranean Vol. XVII (FORTMED2024)". En FORTMED2024 - Defensive Architecture of the Mediterranean. Valencia: Universitat Politàcnica de València, 2024. http://dx.doi.org/10.4995/fortmed2024.2024.18552.
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“Defensive Architecture of the Mediterranean” (volumes XVI and XVII) is the continuation of a series of publications that highlight the latest research on the fortifications of the Mediterranean region. These contributions were gathered in the seventh edition of the international conference Fortifications of the Mediterranean Coast, FORTMED 2024, hosted by Universiteti Politeknik i Tiranës in Tirana, Albania on April 18, 19, and 20, 2024.The series 'Defensive Architecture of the Mediterranean' aims to share knowledge about the historical and current state of military architecture along the Mediterranean coast, including structures built overseas that are influenced by those in the Mediterranean.The conference and the 17 published volumes of the series have demonstrated to be the most persistent and serious effort in researching and documenting military architecture in the Mediterranean over the last decade.While fortresses and castles have always been recognized as vital components of historic built heritage, their strategic defensive role hasn't always been fully understood and explored. The study of military architecture, a multidisciplinary task, prompts a reassessment of this cultural environment, often neglected or at risk. From prehistoric fortification traces to contemporary bunkers and military infrastructures, the discourse on documenting and preserving military heritage welcomes and encourages contributions from diverse fields, including architecture, engineering, archaeology, history, geography, and cultural heritage.FORTMED, the international conference on the Fortifications of the Mediterranean Coast, has evolved into a research-based platform that transcends borders and centuries, delving into the strategic, historical, and cultural significance of fortifications along the Mediterranean coast. FORTMED has embraced diverse venues, ranging from Valencia to Florence, Alicante to Turin, and later to Granada, and finally to Pisa. These conferences have become synonymous with collaboration, knowledge exchange, and the exploration of multifaceted perspectives on defensive architecture. This initiative has turned into an intellectual odyssey, traversing the historical landscapes of the Mediterranean, exploring intricate fortifications that have shaped civilizations, and engaging with contemporary challenges in the preservation and restoration of architectural heritage.
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Pimsarn, Monsak y Kazem Kazerounian. "Tooth Profile Modifications for Optimum Dynamic Load in Spur Gears Based on Pseudo-Interference Stiffness Estimation Method". En ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84562.
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A systematic methodology combining optimization, three dimensional analytical rigid body dynamics and a novel method, namely, Pseudo-Interference Stiffness Estimation method (PISE) [1]- [2], is proposed to dramatically reduce gear design time and improve the spur gear system dynamic performance. The main aim of this methodology is to search for the pro les of tooth crowning and shaving that eventually lead to the optimum dynamic tooth load in the gear mesh. An example of the detailed design study is numerically investigated. The results show that the dynamic tooth load can be reduced to up to 50 percent of its original value. However, this reduction is only valid at the operating ranges of the design load and design speed. It is also found that the effect of pro le modi cation on the dynamic response of the gear system was mostly observed to be a reduction in the peak dynamic tooth load at the resonance speed. Later, the investigation of gear tooth durability was conducted to validate an improvement of gear life. The rating factors given in AGMA publication, Hertzian contact stress, bending fatigue stress, ash temperature and PV index are employed in gear durability determination. The results show that, with the reduction of 50 percent in dynamic tooth load, the reductions in PV index, bending fatigue, Hertzian contact stress, and ash temperature can be achieved up to 64, 58, 28 and 39 percent, respectively.
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Karalus, Megan, Dustin Brandt, Alistair Brown y Vincent Lister. "A Multi-Timescale Approach for the Prediction of Temperatures in a Gas Turbine Combustor Liner". En ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14719.
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Abstract The desire for increased engine efficiencies is driving higher firing temperatures. But this increases the risk for hot spots in solid components which can lead to durability issues. These may not be discovered until late in the design process through expensive and time consuming thermal paint tests. Historically, conjugate heat transfer simulations to predict solid temperatures have been done with steady RANS. However, Large Eddy Simulation (LES) is now being used in the early design process for gas turbine engines to account for the multiphysics of reacting flows. Incorporating the solid into these simulations poses a new challenge: the physical response time of the solid components can be orders of magnitude larger than the reacting gas phase. Running a fully coupled unsteady conjugate heat transfer analysis is therefore not tractable, but the high fidelity of the LES reacting solution is still desired. The objective of this paper is to demonstrate a multi-timescale simulation approach for conjugate heat transfer (CHT) in Simcenter STAR-CCM+ 2019.3. The combustor is solved using LES, including all relevant physics, while steady state conduction is determined in the metal liner and thermal barrier coating. Time averaged boundary conditions are transferred from the combustor to the solids, and temperature is returned through multiple exchanges until the solid temperatures reach a stable solution. A simplified case is used to verify the approach, and then results from a test combustor are compared against data. The investigation compares results obtained with PISO and SIMPLE numerical schemes.
Informes sobre el tema "PISA latex"
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Blumwald, Eduardo y Avi Sadka. Citric acid metabolism and mobilization in citrus fruit. United States Department of Agriculture, octubre de 2007. http://dx.doi.org/10.32747/2007.7587732.bard.
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Accumulation of citric acid is a major determinant of maturity and fruit quality in citrus. Many citrus varieties accumulate citric acid in concentrations that exceed market desires, reducing grower income and consumer satisfaction. Citrate is accumulated in the vacuole of the juice sac cell, a process that requires both metabolic changes and transport across cellular membranes, in particular, the mitochondrial and the vacuolar (tonoplast) membranes. Although the accumulation of citrate in the vacuoles of juice cells has been clearly demonstrated, the mechanisms for vacuolar citrate homeostasis and the components controlling citrate metabolism and transport are still unknown. Previous results in the PIs’ laboratories have indicated that the expression of a large number of a large number of proteins is enhanced during fruit development, and that the regulation of sugar and acid content in fruits is correlated with the differential expression of a large number of proteins that could play significant roles in fruit acid accumulation and/or regulation of acid content. The objectives of this proposal are: i) the characterization of transporters that mediate the transport of citrate and determine their role in uptake/retrieval in juice sac cells; ii) the study of citric acid metabolism, in particular the effect of arsenical compounds affecting citric acid levels and mobilization; and iii) the development of a citrus fruit proteomics platform to identify and characterize key processes associated with fruit development in general and sugar and acid accumulation in particular. The understanding of the cellular processes that determine the citrate content in citrus fruits will contribute to the development of tools aimed at the enhancement of citrus fruit quality. Our efforts resulted in the identification, cloning and characterization of CsCit1 (Citrus sinensis citrate transporter 1) from Navel oranges (Citrus sinesins cv Washington). Higher levels of CsCit1 transcripts were detected at later stages of fruit development that coincided with the decrease in the juice cell citrate concentrations (Shimada et al., 2006). Our functional analysis revealed that CsCit1 mediates the vacuolar efflux of citrate and that the CsCit1 operates as an electroneutral 1CitrateH2-/2H+ symporter. Our results supported the notion that it is the low permeable citrateH2 - the anion that establishes the buffer capacity of the fruit and determines its overall acidity. On the other hand, it is the more permeable form, CitrateH2-, which is being exported into the cytosol during maturation and controls the citrate catabolism in the juice cells. Our Mass-Spectrometry-based proteomics efforts (using MALDI-TOF-TOF and LC2- MS-MS) identified a large number of fruit juice sac cell proteins and established comparisons of protein synthesis patterns during fruit development. So far, we have identified over 1,500 fruit specific proteins that play roles in sugar metabolism, citric acid cycle, signaling, transport, processing, etc., and organized these proteins into 84 known biosynthetic pathways (Katz et al. 2007). This data is now being integrated in a public database and will serve as a valuable tool for the scientific community in general and fruit scientists in particular. Using molecular, biochemical and physiological approaches we have identified factors affecting the activity of aconitase, which catalyze the first step of citrate catabolism (Shlizerman et al., 2007). Iron limitation specifically reduced the activity of the cytosolic, but not the mitochondrial, aconitase, increasing the acid level in the fruit. Citramalate (a natural compound in the juice) also inhibits the activity of aconitase, and it plays a major role in acid accumulation during the first half of fruit development. On the other hand, arsenite induced increased levels of aconitase, decreasing fruit acidity. We have initiated studies aimed at the identification of the citramalate biosynthetic pathway and the role(s) of isopropylmalate synthase in this pathway. These studies, especially those involved aconitase inhibition by citramalate, are aimed at the development of tools to control fruit acidity, particularly in those cases where acid level declines below the desired threshold. Our work has significant implications both scientifically and practically and is directly aimed at the improvement of fruit quality through the improvement of existing pre- and post-harvest fruit treatments.