Limpar
3.457 resultados

Acesso aberto

Tipo do recurso

Ano de criação

Produção nacional

Revisado por pares

Áreas

Idioma

Editores

Capítulo de livro

Ester Cerin, Eva Leslie, Neville Owen, Adrian Bauman,

Physical activity provides many health benefits, including reduced risk of cardiovascular disease, Type II diabetes and some cancers. Environmental exposure factors (e.g., the built environment) are now receiving ever-increasing attention. Large-scale interdisciplinary studies on the association between attributes of local community environments and residents' physical activity are being conducted. We will focus on findings from Australia - the Physical Activity in Localities and Community Environments ( ...

Tópico(s): Obesity, Physical Activity, Diet

2007 - Springer Nature | Lecture notes in geoinformation and cartography

Capítulo de livro

Ester Polo, Pablo del Pino, Alberto Pardo, Pablo Taboada, Beatriz Pelaz,

Cancer is the second leading cause of death globally and was responsible for 8.8 million deaths in 2015. Nearly, 1 in 6 deaths worldwide is due to cancer. An ancient Egyptian textbook on trauma surgery is the oldest (3000 BC) description of cancer treatment, which mentioned a tool called the fire drill to remove tumors. Hand in hand with the development of modern medicine and physiology, other approaches have appeared although surgery remains the most popular "solution". During the twentieth century, ...

Tópico(s): Nanoplatforms for cancer theranostics

2018 - Springer Nature | Nanomedicine and nanotoxicology

Capítulo de livro

Ester Šorm, G Steen,

Tópico(s): Language, Metaphor, and Cognition

2018 - John Benjamins Publishing Company | Converging evidence in language and communication research

Capítulo de livro

Ester Martínez-Martín, Ángel P. del Pobil,

The world's population is ageing and, with that, new social issues arise, especially in terms of healthcare and daily activities. Despite the preference for human professional healthcare, the new socio-economic situation and the decrease in care personnel make necessary to give support to the process of caregiving. In this context, Robotics can be considered as a solution since it can provide healthcare support, help in performing daily tasks, and/or increase the feeling of autonomony and self management. ...

Tópico(s): Prosthetics and Rehabilitation Robotics

2017 - Springer Nature | Intelligent systems reference library

Capítulo de livro

Ester Boix‐Garriga, Beatriz Rodríguez-Amigo, Oriol Planas, Santi Nonell,

Singlet oxygen (1O2) is the first electronic excited state of molecular oxygen (O2). Considered as a distinct chemical entity, its electronic configuration is responsible for its unusual thermodynamic stability but remarkably enhanced reactivity towards other molecules in the singlet state. 1O2 photophysical properties, such as its main pathways of physical deactivation (radiative and nonradiative) and their associated kinetic constants, have gained increased consideration over the last decades. These ...

Tópico(s): Nanoplatforms for cancer theranostics

2016 - Royal Society of Chemistry | Comprehensive series in photochemistry and photobiology/Comprehensive series in photochemical & photobiological sciences

Capítulo de livro Acesso aberto Revisado por pares

Ester Baauw, M.M. Bekker, Wolmet Barendregt,

Inspection-based evaluation methods predicting usability problems can be applied for evaluating products without involving users. A new method (named SEEM), inspired by Norman's theory-of-action model [18] and Malone's concepts of fun [15], is described for predicting usability and fun problems in children's computer games. This paper describes a study to assess SEEM's quality. The results show that the experts in the study predicted about 76% of the problems found in a user test. The validity of SEEM ...

Tópico(s): Innovative Human-Technology Interaction

2005 - Springer Science+Business Media | Lecture notes in computer science

Capítulo de livro Revisado por pares

Ester Bernadó-Mansilla, Xavier Llorà, Josep M. Garrell,

This paper compares the learning performance, in terms of prediction accuracy, of two genetic-based learning systems, XCS and GALE, with six well-known learning algorithms, coming from instance based learning, decision tree induction, rule-learning, statistical modeling and support vector machines. The experiments, performed on several datasets, show the suitability of the genetic-based learning classifier systems for classification tasks. Both XCS and GALE significantly achieved better results ...

Tópico(s): Viral Infectious Diseases and Gene Expression in Insects

2002 - Springer Science+Business Media | Lecture notes in computer science

Capítulo de livro

Ester Higueras García, Emilia Román, José Miguel Fariña,

A healthy city is more than a place where the population does not suffer from infectious diseases, epidemics, or there is an effective preventive vaccination control, as in the XX century. A healthy European city will be one that can provide physical, social and environmental well-being, to all its inhabitants (WHO. Bulletin of the World Health Organization (BLT) 88(4):241–320, 2010). Many countries already have guides, recommendations or handbooks, such as Canada, Australia, the United States, or ...

Tópico(s): Health disparities and outcomes

2020 - Springer International Publishing | International handbooks of quality-of-life

Capítulo de livro Revisado por pares

Ester Torres-Simón, Anthony Pym,

The European Masters in Translation is a network of programs selected because they meet quality standards for translator training. An analysis of 67 programs (from 61 universities located in 21 countries) describes how those standards inform actual curricula. The analysis compares the various admission requirements, hands-on language-specific translation classes, courses on the translation profession, internships, and the status accorded to translation theory and research. It is found that there ...

Tópico(s): Second Language Learning and Teaching

2019 - Routledge | American Translators Association scholarly monograph series

Capítulo de livro

Ester Šorm, Gerard J. Steen,

Tópico(s): Categorization, perception, and language

2018 - John Benjamins Publishing Company | Converging evidence in language and communication research

Capítulo de livro

Ester Á. Serrão, Jon N. Havenhand,

For marine species that live attached to hard substrata, fertilisation of their gametes can present particular problems, from density-dependence in internal fertilizers, to many diverse constraints on the vast majority of species that broadcast gametes to the water column. This chapter reviews the data, the leading hypotheses, and the controversies in this topic, focusing on unresolved issues and future directions. We describe many convergent adaptations to increase fertilisation success in a variety ...

Tópico(s): Coral and Marine Ecosystems Studies

2009 - Springer Nature | Ecological studies

Capítulo de livro

Ester S. M. Leung,

Legal interpreting is more than a service provided to linguistic minorities who do not speak Cantonese (the majority language in Hong Kong), sometimes English interpreting is also a mechanism and establishment to maintain control, by retaining former colonial practices. Despite expectation of change in the legal field in Hong Kong after it was handed back to Mainland China, this study reveals that legal interpreting as a means of providing the linguistic human right to have access to court is a myth ...

Tópico(s): Interpreting and Communication in Healthcare

2008 - John Benjamins Publishing Company | AILA applied linguistics series

Capítulo de livro Revisado por pares

Juan A. Blanco, Éster González de Andrés, Leticia San Emeterio, Yueh‐Hsin Lo,

Mixedwoods are increasingly becoming one of the major focuses in ecological modelling studies, due to their higher productivity and resiliency compared to monocultures. In this chapter, we provide a review on the state-of-the-art of models simulating mixedwood stands. After reviewing almost 400 peer-reviewed publications, it is clear that most modelling exercises are done for explanatory uses rather than for decision-making support tools. Among them, North America and central Europe are the main ...

Tópico(s): Bioenergy crop production and management

2015 - Elsevier BV | Developments in environmental modelling

Capítulo de livro Acesso aberto

Martin Ester, Stefan Gundlach, Hans‐Peter Kriegel, Jörg Sander,

Spatial data mining algorithms heavily depend on the efficient processing of neighborhood relations since the neighbors of many objects have to be investigated in a single run of a typical algorithm. Therefore, providing general concepts for neighborhood relations as well as an efficient implementation of these concepts will allow a tight integration of spatial data mining algorithms with a spatial database management system. This will speed up both, the development and the execution of spatial ...

Tópico(s): Advanced Database Systems and Queries

1999 - Springer Nature | Informatik aktuell

Capítulo de livro Revisado por pares

Martin Ester, Hans‐Peter Kriegel, Jörg Sander,

Tópico(s): Advanced Database Systems and Queries

1999 - Springer Science+Business Media | Lecture notes in computer science

Capítulo de livro Revisado por pares

Martin Ester, Rüdiger Wittmann,

On a data warehouse, either manual analyses supported by appropriate visualization tools or (semi-) automatic data mining may be performed, e.g. clustering, classification and summarization. Attribute-oriented generalization is a common method for the task of summarization. Typically, in a data warehouse update operations are collected and applied to the data warehouse periodically. Then, all derived information has to be updated as well. Due to the very large size of the base relations, it is highly ...

Tópico(s): Advanced Database Systems and Queries

1998 - Springer Science+Business Media | Lecture notes in computer science

Capítulo de livro Acesso aberto Revisado por pares

Martin Ester, Hans‐Peter Kriegel, Jörg Sander,

Knowledge discovery in databases (KDD) is an important task in spatial databases since both, the number and the size of such databases are rapidly growing. This paper introduces a set of basic operations which should be supported by a spatial database system (SDBS) to express algorithms for KDD in SDBS. For this purpose, we introduce the concepts of neighborhood graphs and paths and a small set of operations for their manipulation. We argue that these operations are sufficient for KDD algorithms considering ...

Tópico(s): Geographic Information Systems Studies

1997 - Springer Science+Business Media | Lecture notes in computer science

Capítulo de livro Revisado por pares

Martin Ester, Hans‐Peter Kriegel, Xiaowei Xu,

Both, the number and the size of spatial databases are rapidly growing because of the large amount of data obtained from satellite images, X-ray crystallography or other scientific equipment. Therefore, automated knowledge discovery becomes more and more important in spatial databases. So far, most of the methods for knowledge discovery in databases (KDD) have been based on relational database systems. In this paper, we address the task of class identification in spatial databases using clustering ...

Tópico(s): Advanced Proteomics Techniques and Applications

1995 - Springer Science+Business Media | Lecture notes in computer science

Capítulo de livro Revisado por pares

R. S. Brown, Alexei A. Neverov,

Publisher Summary This chapter elaborates the metal ion-catalyzed hydrolytic reactions of esters, amides, and organophosphorus esters. Apart from being fundamentally interesting and industrially important, phosphoryl and acyl transfer reactions are the key biological processes. Virtually, all the transition metal and lanthanide ions that have been investigated have some catalytic activity in promoting the transesterification of carboxylate esters and neutral phosphate esters. The early studies of ...

Tópico(s): Biochemical and Molecular Research

2007 - Elsevier BV | Advances in physical organic chemistry

Capítulo de livro

Douglas L. Marshall, Jon J. Kabara,

Tópico(s): Analytical Chemistry and Chromatography

2005 - CRC Press | Food science and technology

Capítulo de livro Revisado por pares

Christopher A. Bradlee, Paul Thomas,

The aquatic toxicity of Phthalate esters is discussed in this chapter. This chapter begins with an examination of the physico-chemical properties of phthalate esters that have a significant influence on toxicity. Acute and chronic toxicity are then reviewed with a focus on chronic effects. This chapter concludes with a discussion of studies that have examined the potential for endocrine modulating effects of phthalate esters in aquatic organisms. Perhaps what is most notable about phthalate esters ...

Tópico(s): Toxic Organic Pollutants Impact

2002 - Springer Nature | ˜The œhandbook of environmental chemistry

Capítulo de livro Revisado por pares

Raymond M. David, Gerhard Gans,

Phthalate esters can be divided into three general categories based on size. These categories are low-MW esters used as solvents in cosmetics or as plasticizers of cellulose acetate polymers, mid-MW esters used as solvents in some PVC products but only in combination with other plasticizers in floor coverings, or as a solvent or plasticizer in the cosmetic and pharmaceutical industries, and high-MW esters used as plasticizers of PVC for wire and cable coverings, medical products, and other consumer ...

Tópico(s): Effects and risks of endocrine disrupting chemicals

2002 - Springer Nature | ˜The œhandbook of environmental chemistry

Capítulo de livro Revisado por pares

Ian T. Cousins, Donald Mackay, Thomas F. Parkerton,

A review is presented of the physical-chemical properties and reactivity of the phthalate esters including a discussion of how these properties control their partitioning and fate in the environment. The air and water solubilities decrease by orders of magnitude from the short alkyl chain phthalates such as dimethyl phthalate (DMP) to the long alkyl chain phthalates such as di-2-ethylhexyl phthalate (DEHP). The octanol-water partition coefficient, which is a measure of hydrophobicity, increases by ...

Tópico(s): Chemistry and Chemical Engineering

2002 - Springer Nature | ˜The œhandbook of environmental chemistry

Capítulo de livro

Steven James Randles,

Tópico(s): Analytical Chemistry and Chromatography

1999 - CRC Press | Chemical industries

Capítulo de livro Revisado por pares

R.J. Thatcher, Ronald Kluger,

Publisher Summary The chapter discusses the various mechanism and catalysis of nucleophilic substitution in phosphate esters. The mechanism of substitution reactions of phosphate esters and related compounds has been the subject of many significant recent investigations. The reason for this interest can be traced to the biochemical significance of phosphate esters and their applications. These materials are utilized in metabolism and genetic processes, and energy is released upon their hydrolysis. ...

Tópico(s): Biochemical and Molecular Research

1989 - Elsevier BV | Advances in physical organic chemistry

Capítulo de livro Revisado por pares

C. S. Giam, E. Atlas, Madison Powers, Jack E. Leonard,

Tópico(s): Effects and risks of endocrine disrupting chemicals

1984 - Springer Nature | ˜The œhandbook of environmental chemistry

Capítulo de livro Revisado por pares

Anthony S. Serianni, E. Cadman, John P. Pierce, Michael L. Hayes, R. Barker,

This chapter describes the enzymic synthesis of 13C-enriched aldoses, ketoses, and their phosphate esters. The carbohydrates with isotopic enrichment at specific sites are prepared by enzymic modification of chemically synthesized precursors. The method for preparing isotopically enriched aldoses or aldose phosphates is extended to prepare ketoses or ketose phosphates using commercially available enzymes and substrates, such as adenosine triphosphate (ATP). Dihydroxyacetone phosphate (DHAP) is prepared ...

Tópico(s): Metabolism and Genetic Disorders

1982 - Academic Press | Methods in enzymology on CD-ROM/Methods in enzymology

Capítulo de livro Revisado por pares

M. V. George, Sushil K. Khetan, Rakesh Kumar Gupta,

This chapter highlights the use of acetylenic esters in the synthesis of different heterocycles, primarily involving nucleophilic additions. The chapter discusses the reaction of amines with acetylenic esters. The primary amines react with dimethyl acetylenedicarboxylate (DMAD), giving rise chiefly to the enamine fumarates. The preferential formation of the fumarates in these additions can be understood in terms of their relative stabilities, as compared to the corresponding maleates, due to internal ...

Tópico(s): Synthesis and Characterization of Pyrroles

1976 - Elsevier BV | Advances in heterocyclic chemistry

Capítulo de livro Revisado por pares

Robert H. McCluer, James Evans,

Tópico(s): Sphingolipid Metabolism and Signaling

1972 - Springer Nature | Advances in experimental medicine and biology

Capítulo de livro Revisado por pares

Frank Einseberg,

Tópico(s): Carbohydrate Chemistry and Synthesis

1972 - Academic Press | Methods in enzymology on CD-ROM/Methods in enzymology