Higher Harmonics in Non-Linear Vacuum from QED Effects Without Low Mass Intermediate Particles

We show that in the presence of a slowly rotating strong transverse magnetic field there is an infinite spectrum of harmonic wave functions $A_n$ due to the first order QED correction (in $\alpha^2$) given by the Euler-Heisenberg Lagrangian. The frequency shifts are integer multiples $\pm \omega_0 n$ of the magnetic field angular frequency rotation $\omega_0=2\pi\nu_m$ and the several modes $n$ are coupled to the nearest harmonics $n\pm 1$. This is a new effect due to QED vacuum fluctuations, not exploit before, that can explain, both qualitatively and quantatively, the recent experimental results of the PVLAS collaboration without the need of a low mass intermediate particle, hence dismiss the recent claim of the discovery of the axion. [Erratum: The PVLAS signal cannot be explained by this mechanism.]Comment: 4 pages, 1 figure; includes Erratum: The PVLAS signal cannot be explained by this mechanis

Experimentação participativa no âmbito do programa Brasil Sem Miséria no território da cidadania do agreste de Alagoas.

A Embrapa Tabuleiros Costeiros vem desenvolvendo desde 2012 a construção participativa de soluções agroecológicas junto ao Plano Brasil Sem Miséria ? PBSM, no Território Agreste Alagoano. O objetivo deste trabalho é a sistematização de experiências agroecológicas nas Unidades de Experimentação - UE?s - em 12 municípios inseridos no PBSM. O processo se constituiu em: aracterização socioeconômica e conhecimento da realidade local; planejamento com sensibilização, visita ao local da experimentação e desenho de mapas da UE?s; implantação das UE?s e; capacitações em Agroecologia e no manejo de caprinos e ovinos. Conclui-se que a participação dos agricultores no processo de planejamento enfatizou o protagonismo social destes, além de contribuírem para formação de sistemas de produção adaptados a realidade local, sendo assim um processo rico para construção do conhecimento agroecológico

Avaliação da compatibilidade de enxertia de berinjela em baquicha.

O objetivo deste trabalho foi o de avaliar a compatibilidade de enxertia de berinjela em baquicha. O ensaio foi conduzido no campo experimental da Embrapa Hortaliças, 15o55?45? S, 48o08?33? W, altitude de 998 m, em um latossolo vermelho amarelo, com delineamento experimental de blocos inteiramente casualizados com cinco repetiçõesbitstream/item/212797/1/BPD-198.pd

Large scale predictive process mining and analytics of university degree course data

© 2017 ACM. For students, in particular freshmen, the degree pathway from semester to semester is not that transparent, although students have a reasonable idea what courses are expected to be taken each semester. An often-pondered question by students is: "what can I expect in the next semester?" More precisely, given the commitment and engagement I presented in this particular course and the respective performance I achieved, can I expect a similar outcome in the next semester in the particular course I selected? Are the demands and expectations in this course much higher so that I need to adjust my commitment and engagement and overall workload if I expect a similar outcome? Is it better to drop a course to manage expectations rather than to (predictably) fail, and perhaps have to leave the degree altogether? Degree and course advisors and student support units find it challenging to provide evidence based advise to students. This paper presents research into educational process mining and student data analytics in a whole university scale approach with the aim of providing insight into the degree pathway questions raised above. The beta-version of our course level degree pathway tool has been used to shed light for university staff and students alike into our university's 1,300 degrees and associated 6 million course enrolments over the past 20 years

A consistent scalar-tensor cosmology for inflation, dark energy and the Hubble parameter

The authors are grateful for financial support to the Cruickshank Trust (CW), EPSRC/GG-Top (CW, JR), Omani Government (MA), Science Without Borders programme, CNPq, Brazil (DR), and STFC/CfFP (CW, AM, RB, JM). CW and AM acknowledge the hospitality of CERN, where this work was started. The University of Aberdeen and University of Edinburgh are charitable bodies registered in Scotland, with respective registration numbers SC013683 and SC005336.Peer reviewedPostprin

Conceptual modelo f the impact assessment of innovation - case studies from agricultural research organizations in France, Brazil and Australia.

Agricultural research has an important role for the world population by considering it as a strategic area for providing knowledge and technological base for agricultural production. This sector generates outputs, outcomes with respective impacts to rural zones, supply chains, economy, society and environment. The agricultural research & innovation represents a key piece for reaching the United Nations sustainable development goals (SDG), especially to SDG 2 and 12 ? to promote sustainable agricultural to eliminate hunger and improving nutrition, as well as to promote sustainable consumption and production, respectively. In order to check whether agricultural research organizations generate sustainable impacts, it is necessary to assess the impacts of their innovations. Funders, supreme auditing institutions, parliament, government, producers, supply chains, consumers and all society require transparency, efficacity, and effectivity of public organizations: they must highlight return of public investment as well as generate positive impact to the economy and society, and minimize negative impacts to the environment. Many public research organizations around the world have developed impact assessment processes. There is no flawed theories and practices approaches to impact assessment context. Therefore, this research seeks to fill gaps or to supplement the existing approaches. The main thesis objective is to summarize theoretical and practical studied approaches on impact assessment, including the experiences of four research organizations, and to develop a conceptual model of innovation impact assessment management system, especially applicable to agricultural research organizations. It adopts a methodology based on literature review, four cases of a comparative study of agricultural research organizations (Cirad and Inra from France, Embrapa from Brazil, and CSIRO from Australia), and benchmarking these experiences studied. The innovative contributions of this thesis are I. construction of a conceptual model of an impact assessment management system based on the open innovation process; II. the model of innovation impact assessment management system considers a cross-cut view of sustainability, integrating the environmental, social, political and economic dimensions; III. the innovation impact assessment system will be based on a unique managerial process that regards ex-ante and ex-post assessment stages according to its respective temporality; IV. the management of the innovation and impact assessment processes foresees the insertion of behavioral approaches such as concepts of holism, constructivism, transdisciplinarity and agile management practices as essential requirements for the effective engagement of the internal and external actors and the effectiveness of the evaluation process. This thesis has an original approach by bringing a research governance tool with an innovative focus on ex-ante and ex-post impact management, helping research and innovation organizations to become increasingly sustainable in their institutional missions, thus contributing to the achievement of the UN's sustainable development goals towards more productive and sustainable agriculture.Thesis (Doctor of agricultural sciences) - Université de Montpellier, Montpellier, França. Título em francês: Modèle conceptuel d'évaluation de l'impact de l'innovation - basé sur des études de cas des organisations de recherche agricole en France, Brésil et Australie

Reação de acessos de Solanum stramonifolium A Meloidogyne enterolobil.

O objetivo deste trabalho foi avaliar a reação de dezessete acessos de Solanum stramonifolium, orindos de municípios da região norte e nordeste do Brasil