scholarly journals A Survey of the Elastic Flow of Curves and Networks

Author(s):  
Carlo Mantegazza ◽  
Alessandra Pluda ◽  
Marco Pozzetta

AbstractWe collect and present in a unified way several results in recent years about the elastic flow of curves and networks, trying to draw the state of the art of the subject. In particular, we give a complete proof of global existence and smooth convergence to critical points of the solution of the elastic flow of closed curves in $${\mathbb {R}}^2$$ R 2 . In the last section of the paper we also discuss a list of open problems.

2019 ◽  
Vol 8 (1) ◽  
pp. 221-235 ◽  
Author(s):  
Daniella De Paula Chiesa ◽  
Mário Antônio Sanches ◽  
Daiane Priscila Simão-Silva

O estudo do Planejamento familiar, no contexto da bioética, abre-se para diversas perspectivas, entre elas a valorização dos seus diferentes atores. Situado neste contexto o artigo tem como objetivo identificar o perfil de gênero na produção científica sobre Planejamento Familiar no Brasil, entre 2000 e 2014, assim como a área de formação e especialização dos autores. Foram utilizadas metodologias que permitiram mapear o estado da arte do tema estudado, a partir de uma revisão da literatura. O resultado da pesquisa identifica que a produção científica sobre Planejamento Familiar no Brasil se compõe de perfil destacadamente feminino (71,76%). Dos 73 artigos analisados, 42 (57,53%) o foco do tema está direcionado à mulher assim como evidencia-se a área de ciências da saúde com maior concentração das publicações do tema.  Este aspecto da pesquisa abre para uma realidade complexa onde se buscam criticamente as razões para a pesquisa em Planejamento Familiar ter ênfase na mulher e ser um tema de relevância nas ciências da saúde.Palavras-chave: Produção científica, Planejamento Familiar, Gênero.  ABSTRACT: The study of Family Planning, in the context of bioethics, opens to diverse perspectives, among them the appreciation of their different agents. Situated in this context the article aims to identify the profile of gender in scientific literature on Family Planning in Brazil, between 2000 and 2014, as well as the area of training and specialization of the authors. Methodologies were used which allowed to map the State of the art of the subject studied, from a review of the literature. The results found identify that the scientific production on Family Planning in Brazil is formed with a outstandingly female profile (71,76%). Of the 73 articles examined, 42 (57.53%) the focus of the topic is directed to women as well as showing the health sciences area with highest concentration of publications. This aspect of the research opens to a complex reality where we seek critically the reasons for Research in Family Planning have emphasis on woman and be a topic of relevance in health sciences.Keywords: Scientific Production, Family Planning, Gender.


2018 ◽  
pp. 97-113
Author(s):  
Yvette Santos ◽  
Alice Cunha

The ERASMUS Programme, established in June 1987, is considered one of the most popular European education programmes as it favours the academic mobility of thousands of students. Given the importance of ERASMUS in building a Europe of knowledge, this article aims to analyse the importance of ERASMUS toPortugal since its implementation. The state of the art on the subject is not exhaustive. Although much research on student mobility with a focus on ERASMUS at the European level has been undertaken – albeit difficult to summarise given the diversity of studies – Portuguese literature has not kept pace since existing studies are mainly Masters dissertations of a qualitative nature, supported by interviews with former ERASMUS students and covering the recent years of the Programme. Bearing this in mind, this article, in addition to identifying the main stages that led to the establishment of the Programme and highlighting thecontours of its implementation in Portugal, seeks to analyse the participatory trends of Portuguese students attending the first university cycle (the so-called outgoings) from 1987 to 2014, the year ERASMUS+ started.


2013 ◽  
Vol 15 (03) ◽  
pp. 1340015 ◽  
Author(s):  
VITO FRAGNELLI ◽  
STEFANO GAGLIARDO

Location problems describe those situations in which one or more facilities have to be placed in a region trying to optimize a suitable objective function. Game theory has been used as a tool to solve location problems and this paper is devoted to describe the state-of-the-art of the research on location problems through the tools of game theory. Particular attention is given to the problems that are still open in the field of cooperative location game theory.


Author(s):  
Sebastian van Strien

This chapter discusses Milnor's conjecture on monotonicity of entropy and gives a short exposition of the ideas used in its proof. It discusses the history of this conjecture, gives an outline of the proof in the general case, and describes the state of the art in the subject. The proof makes use of an important result by Kozlovski, Shen, and van Strien on the density of hyperbolicity in the space of real polynomial maps, which is a far-reaching generalization of the Thurston Rigidity Theorem. (In the quadratic case, density of hyperbolicity had been proved in studies done by M. Lyubich and J. Graczyk and G. Swiatek.) The chapter concludes with a list of open problems.


Author(s):  
Laurence Saglietto

The concept of intermediation has existed for a long time and taken numerous different forms. In this introductory chapter, we will therefore start by examining the state of the art of intermediaries through a range of different disciplines (history, management, economics, health, sociology), highlighting their historical evolution and current forms. We will then present the different models and theories of intermediation and their development, to produce an appreciation of their similarities and differences and a comprehensive view of the subject. This will allow us, in the last section, to propose the framework for a general theory of intermediation, in terms of organisational architecture and the services provided.


1898 ◽  
Vol 2 (6) ◽  
pp. 29-33
Author(s):  
L. Hargrave

There is a publication called the “Aeronautical Annual,” edited by James Means, Boston, Mass. In No. ‘Z and 3 of that work, Mr. Octave Chanute goes exhaustively into the question of sailing flight, and specifies every letter and article that bears on the subject. This paper may be said to take up the running where Mr. Chanute leaves off. My reasons for not writing to that periodical straight, are that publication would be delayed for many months; and the state of the art is such that at any moment some one of the many who are investigating this subject may drop on the facts stated in this paper, take out a master patent which would rule the construction of all future flying machines, and tax us all round for our good, as the protectionists say, thus throwing our work back for years. I therefore, with your permission, read this paper, and show the models that work as I describe, and thereby destroy the novelty of the invention for all time.


1980 ◽  
Vol 6 (3-4) ◽  
pp. 151-158 ◽  
Author(s):  
M. Honore ◽  
R. Govaearts ◽  
D. Hostens ◽  
B. Bouw ◽  
B. Matton ◽  
...  

This paper describes the state of the art in the development of a polymer based printed circuit board (PCB) compatible resistor ink system. The subject is treated from the standpoint of the manufacturer who, up to now, supplied himself with PCB circuitry.


2013 ◽  
Vol 15 (02) ◽  
pp. 1340006 ◽  
Author(s):  
MICHELA CHESSA ◽  
VITO FRAGNELLI

The issue of veto may play an important role in an approval situation, mainly in political science, where several scholars dealt with this topic. In this survey we want to update the state-of-the-art, paying particular attention to the open problems that various authors pointed out in their research fields.


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