1,720,953 research outputs found
Biochar: uma revisão bibliográfica dos avanços científicos e industriais, das possibilidades no contexto brasileiro e do seu potencial para o desenvolvimento sustentável
Full text linkTCC (graduação) - Universidade Federal de Santa Catarina, Centro Tecnológico, Engenharia Sanitária e Ambiental.A poluição ambiental tem sido um assunto de grande interesse tendo em vista que o aumento
do consumo e da industrialização tem gerado maior emissão de matéria e energia com efeitos
adversos ao meio ambiente. Em relação aos resíduos, eles podem ser identificados como
resíduos florestais, de agricultura, provenientes de Estações de Tratamento de Esgoto (ETE),
resíduos sólidos urbanos e de processamento industrial, podendo ser uma fonte matéria-prima
para outros processos, como, por exemplo, a produção de biochar. O biochar é um material
carbonáceo produzido a partir carbonização de resíduos orgânicos. Os resíduos são aquecidos
a altas temperaturas, resultando na produção de gases, líquidos e um resíduo sólido rico em
carbono denominado biochar. Tal processo pode ser uma solução sustentável para o
gerenciamento desses resíduos. Nesse sentido, este estudo teve como objetivos (i) verificar os
avanços das pesquisas sobre os usos e aplicações do biochar nos últimos 3 a 5 anos, (ii)
identificar o cenário de produção industrial de biochar no mundo, buscando as grandes
empresas e seus principais mercados, (iii) analisar a disponibilidade de resíduos para a produção
e aplicação do biochar no Brasil, e (iv) relacionar as possíveis aplicações do biochar com os
Objetivos do Desenvolvimento Sustentável (ODS). Os resultados revelam um aumento
significativo nas pesquisas sobre biochar a partir do ano de 2020, destacando-se a China e Índia
como líderes em publicações acerca do tema. Com relação às indústrias de biochar, a Europa
se destaca com 130 empresas e uma produção aproximada de 33.500 toneladas de biochar no
ano de 2022. No contexto brasileiro, há um potencial produtivo significante no setor
agropastoril, porém ainda existe mercado para expansão industrial, tendo em vista que a
NetZero é a única brasileira a explorar esse potencial de produção do biochar, com 4.500
toneladas por ano. Além disso, o biochar contribui para alguns dos ODS, como gestão
sustentável da água (ODS 6), transição para energia limpa e renovável (ODS 7), ação contra a
mudança global, considerando que o biochar influencia na redução da pegada de carbono e
contribuição do biochar para a biodiversidade (ODS 15). Com isso, o biochar emerge como
uma promissora solução sustentável no gerenciamento de resíduos, revelando avanços
significativos em pesquisas recentes. Ao analisar seu potencial global e o cenário brasileiro,
destaca-se a necessidade de expandir a produção industrial para alinhar-se aos ODS,
evidenciando seu papel na gestão sustentável da água, transição para energia limpa, ação contra
a mudança climática e preservação da biodiversidade.Environmental pollution has been a subject of great interest, considering that increased
consumption and industrialization have led to higher emissions of matter and energy, with
adverse effects on the environment. Regarding waste, it can be identified as forest, agricultural,
sewage treatment plant (STP) residues, municipal solid waste, and industrial processing
residues, serving as a raw material source for other processes, such as biochar production.
Biochar is a carbonaceous material produced through the carbonization of organic residues. The
residues are heated to high temperatures, resulting in the production of gases, liquids, and a
solid carbon-rich residue called biochar. This process can be a sustainable solution for waste
management. In this context, this study aimed to (i) assess advances in research on the uses and
applications of biochar in the last 3 to 5 years, (ii) identify the industrial biochar production
scenario worldwide, focusing on major companies and their main markets, (iii) analyze the
availability of residues for biochar production and application in Brazil, and (iv) relate possible
biochar applications to the Sustainable Development Goals (SDGs). The results reveal a
significant increase in biochar research since 2020, with China and India standing out as leaders
in biochar publications. Concerning biochar industries, Europe stands out with 130 companies
and a production of around 33,500 tons of biochar in 2022. In the Brazilian context, there is
significant production potential in the agropastoral sector, but there is still room for industrial
expansion. NetZero is the only Brazilian company exploring this biochar production potential,
with an annual output of 4,500 tons. Furthermore, biochar contributes to some of the SDGs,
such as sustainable water management (SDG 6), transition to clean and renewable energy (SDG
7), action against global climate change, as biochar influences carbon footprint reduction, and
contribution to biodiversity preservation (SDG 15). Thus, biochar emerges as a promising
sustainable solution in waste management, revealing significant advances in recent research.
When analyzing its global potential and the Brazilian scenario, there is a need to expand
industrial production to align with the SDGs, highlighting its vital role in sustainable water
management, transition to clean energy, action against climate change, and biodiversity
preservation
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
- …
