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1000 tulosta hakusanalla Gustavo Olinto Da Silva

Étude théorique des nanotubes de TiO2 et de leurs interactions avec les gaz

Étude théorique des nanotubes de TiO2 et de leurs interactions avec les gaz

Gustavo Olinto Da Silva

Editions Notre Savoir
2024
pokkari
L' tude th orique des nanotubes de dioxyde de titane a utilis une m thodologie de cr ation de mod les de nanotubes partir des cellules unitaires de cristaux de TiO2 (rutile et anatase) dans des plans sp cifiques, en l'occurrence l'anatase dans le plan (101) et le rutile dans le plan (110). Les structures g n r es ont t soumises des calculs de m canique quantique en utilisant des m thodes semi-empiriques (PM7) et des m thodes ab-initio DFT et HF dans les bases 6-31G et 6-311G. Des mod les ont t cr s et il a t constat que les structures les plus stables taient celles ayant les plus grands diam tres. Une comparaison entre des mod les ayant le m me nombre d'atomes a montr que les nanotubes d'anatase taient plus stables que les nanotubes de rutile. Lors de l' valuation du gap l'aide de m thodes semi-empiriques et HF, les nanotubes d'anatase ont t class s comme isolants en raison de la plage de gap comprise entre 6,00 eV et 10,00 eV, tandis que les valeurs DFT ont montr des valeurs comprises entre 2,00 eV et 2,50 eV. La m thodologie d velopp e a montr un fort potentiel d'application dans la simulation des nanotubes de TiO2.
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Studio teorico dei nanotubi di TiO2 e delle loro interazioni con i gas

Studio teorico dei nanotubi di TiO2 e delle loro interazioni con i gas

Gustavo Olinto Da Silva

Edizioni Sapienza
2024
pokkari
Lo studio teorico dei nanotubi di biossido di titanio ha utilizzato una metodologia per creare modelli di nanotubi a partire dalle celle unitarie dei cristalli di TiO2 (rutilo e anatasio) in piani specifici, in questo caso l'anatasio nel piano (101) e il rutilo nel piano (110). Le strutture generate sono state sottoposte a calcoli di meccanica quantistica utilizzando metodi semiempirici (PM7) e metodi ab-initio DFT e HF nelle basi 6-31G e 6-311G. Sono stati creati dei modelli ed emerso che le strutture pi stabili sono quelle con i diametri pi grandi. Un confronto tra modelli con lo stesso numero di atomi ha mostrato che i nanotubi di anatasio erano pi stabili di quelli di rutilo. Valutando il gap con i metodi semi-empirici e HF, i nanotubi di anatasio sono stati classificati come isolanti grazie al range di gap compreso tra 6,00 eV e 10,00 eV, mentre i valori DFT hanno mostrato valori compresi tra 2,00 eV e 2,50 eV. La metodologia sviluppata ha mostrato un elevato potenziale di applicazione nella simulazione di nanotubi di TiO2.
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Theoretical study of TiO2 nanotubes and their interactions with gases

Theoretical study of TiO2 nanotubes and their interactions with gases

Gustavo Olinto Da Silva

Our Knowledge Publishing
2024
pokkari
The theoretical study of titanium dioxide nanotubes used a methodology for creating nanotube models from the unit cells of TiO2 crystals (rutile and anatase) in specific planes, in this case anatase in the (101) plane and rutile in the (110) plane. The structures generated were subjected to quantum mechanics calculations using semiempirical methods (PM7) and ab-initio DFT and HF methods, in the 6-31G and 6-311G bases. Models were created and it was found that the most stable structures were those with the largest diameters. A comparison between models with the same number of atoms showed that anatase nanotubes were more stable than rutile nanotubes. When evaluating the gap using semi-empirical and HF methods, the anatase nanotubes were classified as insulating due to the gap range between 6.00 eV and 10.00 eV, while the DFT values showed values between 2.00 eV and 2.50 eV. The methodology developed showed high potential for application in the simulation of TiO2 nanotubes.
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Theoretische Untersuchung von TiO2-Nanoröhrchen und ihrer Wechselwirkungen mit Gasen

Theoretische Untersuchung von TiO2-Nanoröhrchen und ihrer Wechselwirkungen mit Gasen

Gustavo Olinto Da Silva

Verlag Unser Wissen
2024
pokkari
F r die theoretische Untersuchung der Titandioxid-Nanor hren wurde eine Methode zur Erstellung von Nanor hrenmodellen aus den Einheitszellen von TiO2-Kristallen (Rutil und Anatas) in bestimmten Ebenen verwendet, in diesem Fall Anatas in der (101)-Ebene und Rutil in der (110)-Ebene. Die erzeugten Strukturen wurden quantenmechanischen Berechnungen mit semiempirischen Methoden (PM7) und ab-initio DFT- und HF-Methoden in den Basen 6-31G und 6-311G unterzogen. Es wurden Modelle erstellt und es wurde festgestellt, dass die stabilsten Strukturen diejenigen mit den gr ten Durchmessern waren. Ein Vergleich zwischen Modellen mit der gleichen Anzahl von Atomen zeigte, dass Anatas-Nanor hren stabiler waren als Rutil-Nanor hren. Bei der Bewertung der L cke mit semi-empirischen und HF-Methoden wurden die Anatas-Nanor hren aufgrund des L ckenbereichs zwischen 6,00 eV und 10,00 eV als isolierend eingestuft, w hrend die DFT-Werte Werte zwischen 2,00 eV und 2,50 eV ergaben. Die entwickelte Methodik zeigte ein hohes Potenzial f r die Anwendung bei der Simulation von TiO2-Nanor hren.
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Gustavo

Gustavo

Flavia Z. Drago

Turbine
2020
sidottu
Gustavo er et spøgelse.Et meget, meget genert spøgelse.Han ønsker sig mere end andet en ven.Men det kræver mod ... En rigtig hyggelig spøgelseshistorie, der viser, at spøgelse også bare er en slags mennesker med følelser. En bog, der egner sig perfekt til hyggelig læsning i forbindelse med halloween, men også resten af året.
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Gustavo Gutierrez

Gustavo Gutierrez

Gustavo Gutierrez

SCM PRESS
1996
pokkari
This book offers a selection of representative texts which should enable readers to perceive the whole breadth and depth of Gutierrez's challenge to late twentieth-century Christians.
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Gustavo Gutiérrez and the Liberative Sight of Christ

Gustavo Gutiérrez and the Liberative Sight of Christ

Luke Foster

SCM PRESS
2024
nidottu
How can we speak of God as Father in a world that is inhumane? While many engagements with Gutiérrez's theology centre on such themes as the option for the poor, the role of praxis, or the Kingdom of God, in Gustavo Gutiérrez and the Liberative Sight of Christ Luke Foster explores the underlying theological convictions and commitments within which these concepts cohere. By developing an analysis that is attentive to the unity and coherence of Gutiérrez's thought, Foster resources a critique that is distinctive not only in its pertinence but also in the possibilities that it opens for the development of his project in the future. Innovatively offering a systemic account of Gutiérrez's theology, this book offers both an indispensable overview for those who are engaging with Gutiérrez for the first time and a distinctive analysis for those who are seeking to deepen their understanding of his work.
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Gustavo Gutierrez

Gustavo Gutierrez

Gustavo Gutiaerrez

Augsburg Fortress
1996
nidottu
This volume concentrates on the key texts and ideas in Gustavo Gutierrez's thought. It presents the essential Gutierrez for students and the general reader. In his first anthology of Gutierrez's massively influential work, James Nickoloff draws from Gutierrez's many published books and translates some pieces for the first time. Arranged both thematically and chronologically, the Selected Texts highlight not only the revolutionary import of Gutierrez's theology but also his deep and searching spirituality, his bold view of the church, and his personal challenge to the reader to engage the world's injustices directly. Nickoloff's expert Introduction explains the development of Gutierrez's ideas and sheds new light on the Latin American, especially Peruvian, context of his thought.
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Gustavo Esteva

Gustavo Esteva

Gustavo Esteva

TAYLOR FRANCIS LTD
2022
sidottu
In his reflections on decolonization and post-development, Gustavo Esteva forged a unique synthesis of critical theory and political economy. This book presents more than half a century of "reflection in action" in the form of essays, books, and interventions in national and international forums and newspaper articles—most published here for the very first time. It showcases Esteva’s evolving thought on economic theory, social change, revolutionary subjectivity, transition, development, the challenges of a new era and personal and communal autonomy, all associated with the challenges and advances in the construction of a new society. Through this translation, Esteva’s writings engage with many of the important cultural and political debates of the present day and retain their power both to provoke and move the reader. Readers will see a thinker at work, formulating local, grassroots alternatives as they are emerging in Mexico and Latin America, with a keen sensibility to what happens in other regions of the world. Gustavo Esteva: A Critique of Development and Other Essays offers a lucid insight into the climatic and sociopolitical collapses we face and will be of interest to students and scholars of critical theory, post-colonial and de-colonial studies, and post-development studies.
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Gustavo Esteva

Gustavo Esteva

Gustavo Esteva

TAYLOR FRANCIS LTD
2022
nidottu
In his reflections on decolonization and post-development, Gustavo Esteva forged a unique synthesis of critical theory and political economy. This book presents more than half a century of "reflection in action" in the form of essays, books, and interventions in national and international forums and newspaper articles—most published here for the very first time. It showcases Esteva’s evolving thought on economic theory, social change, revolutionary subjectivity, transition, development, the challenges of a new era and personal and communal autonomy, all associated with the challenges and advances in the construction of a new society. Through this translation, Esteva’s writings engage with many of the important cultural and political debates of the present day and retain their power both to provoke and move the reader. Readers will see a thinker at work, formulating local, grassroots alternatives as they are emerging in Mexico and Latin America, with a keen sensibility to what happens in other regions of the world. Gustavo Esteva: A Critique of Development and Other Essays offers a lucid insight into the climatic and sociopolitical collapses we face and will be of interest to students and scholars of critical theory, post-colonial and de-colonial studies, and post-development studies.
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Gustavo, the Shy Ghost

Gustavo, the Shy Ghost

Flavia Z. Drago

Walker Books Ltd
2021
nidottu
THE WINNER OF THE KLAUS FLUGGE PRIZE 2021A #1 NEW YORK TIMES BESTSELLER "A great story about making friends by being yourself and the illustrations are a constant visual delight" Malorie BlackmanGustavo is a ghost. He is good at doing all sorts of paranormal things, like walking through walls, making objects fly and glowing in the dark. And he loves playing beautiful music on his violin. But Gustavo also has a problem. He is SHY. Which means some things are harder for him to do, like getting in a line to buy eye-scream or talking to the other monsters. But Gustavo longs to be a part of something, he longs to be seen. More than anything, he wants to make a friend. So, plucking up all his courage, he sends a very special letter: “Dear Monsters, I would like to invite you to my violin concert at the Day of the Dead party…”With exquisite detail and humour, Flavia Z. Drago’s vivid illustrations tell a sweet and offbeat story of friendship and courage.
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