Secondary stress in Brazilian Portuguese: the interplay between production and perception studies

This paper reports experiments on speech production showing that secondary stress in Brazilian Portuguese (BP) can be best described as phrase-initial prominence cued by greater duration and pitch accent excursion in initial position. It also reports a perception experiment in which clicks were associated to consecutive V-to-V positions in stress groups. Mean click detection RTs are gradient, but show no influence of initial lengthening. RTs near the phrasally stressed position are shorter and almost 60% of RT variance can be accounted for by produced timing patterns

Surface magnetization in non-doped ZnO nanostructures

We have investigated the magnetic properties of non-doped ZnO nanostructures by using {\it ab initio} total energy calculations. Contrary to many proposals that ferromagnetism in non-doped semiconductors should be induced by intrinsic point defects, we show that ferromagnetism in nanostructured materials should be mediated by extended defects such as surfaces and grain boundaries. This kind of defects create delocalized, spin polarized states that should be able to warrant long-range magnetic interactions.Comment: 8 pages, 3 figure

Tools and resources for neuroanatomy education: a systematic review

The aim of this review was to identify studies exploring neuroanatomy teaching tools and their impact in learning, as a basis towards the implementation of a neuroanatomy program in the context of a curricular reform in medical education

A Bag-of-Tasks Scheduler Tolerant to Temporal Failures in Clouds

Cloud platforms have emerged as a prominent environment to execute high performance computing (HPC) applications providing on-demand resources as well as scalability. They usually offer different classes of Virtual Machines (VMs) which ensure different guarantees in terms of availability and volatility, provisioning the same resource through multiple pricing models. For instance, in Amazon EC2 cloud, the user pays per hour for on-demand VMs while spot VMs are unused instances available for lower price. Despite the monetary advantages, a spot VM can be terminated, stopped, or hibernated by EC2 at any moment. Using both hibernation-prone spot VMs (for cost sake) and on-demand VMs, we propose in this paper a static scheduling for HPC applications which are composed by independent tasks (bag-of-task) with deadline constraints. However, if a spot VM hibernates and it does not resume within a time which guarantees the application's deadline, a temporal failure takes place. Our scheduling, thus, aims at minimizing monetary costs of bag-of-tasks applications in EC2 cloud, respecting its deadline and avoiding temporal failures. To this end, our algorithm statically creates two scheduling maps: (i) the first one contains, for each task, its starting time and on which VM (i.e., an available spot or on-demand VM with the current lowest price) the task should execute; (ii) the second one contains, for each task allocated on a VM spot in the first map, its starting time and on which on-demand VM it should be executed to meet the application deadline in order to avoid temporal failures. The latter will be used whenever the hibernation period of a spot VM exceeds a time limit. Performance results from simulation with task execution traces, configuration of Amazon EC2 VM classes, and VMs market history confirms the effectiveness of our scheduling and that it tolerates temporal failures

Foreword

Cultural heritage and museums connote many diverse realities, especially since the last decades of the 20th century when the demand for and access to cultural rights became more diversified and when the social and technological bases of politics and communications were undergoing structural change. Heritage and museums were emancipated from their original function as support for the ideological underpinning of nation states, becoming more flexible and acquiring multiple meanings through their..

Theoretical Investigation Of A Mn-doped Si Ge Heterostructure

We investigate, through ab initio density-functional theory calculations, the electronic and structural properties of neutral Mn impurities at tetrahedral interstitial and substitutional sites in both Si and Ge layers of a Si Ge heterostructure. We conclude that substitutional Mn at the Ge layers is more stable than interstitial Mn at the Si layers by approximately 0.45 eV, and we estimate an energy barrier of at least 1.12 eV to diffuse away from these most stable substitutional sites. Mn has a magnetic moment in the heterostructure that is similar to that in the bulk, and for the compressed Ge layer the Mn-Mn exchange interaction is always weakly antiferromagnetic. Varying the lattice constant of the substrate, the Mn-Mn ground state becomes ferromagnetic. This result opens up the possibility of manipulating the interaction between Mn impurities at Ge layers grown over a Si1-x Gex substrate by changing x. © 2007 The American Physical Society.757Žutić, I., Fabian, J., Das Sarma, S., (2004) Rev. Mod. Phys., 76, p. 323. , RMPHAT 0034-6861 10.1103/RevModPhys.76.323MacDonald, A.H., Schiffer, P., Samarth, N., (2005) Nat. Mater., 3, p. 195. , NMAACR 1476-1122Park, Y.D., Wilson, A., Hanbicki, A.T., Mattson, J.E., Ambrose, T., Spanos, G., Jonker, B.T., (2001) Appl. Phys. Lett., 78, p. 2739. , APPLAB 0003-6951 10.1063/1.1369151Silva Da, R.A.J., Fazzio, A., Antonelli, A., (2004) Phys. Rev. B, 70, p. 193205. , PRBMDO 0163-1829 10.1103/PhysRevB.70.193205Woodbury, H.H., Ludwig, G.W., (1960) Phys. Rev., 117, p. 102. , PHRVAO 0031-899X 10.1103/PhysRev.117.102Nakashima, H., Hashimoto, K., (1991) J. Appl. Phys., 69, p. 1440. , JAPIAU 0021-8979 10.1063/1.347285Kamon, Y., Harima, H., Yanase, A., Katayama-Yoshida, H., (2001) Physica B, 308-310, p. 391. , PHYBE3 0921-4526Perdew, J.P., Wang, Y., (1992) Phys. Rev. B, 45, p. 13244. , PRBMDO 0163-1829 10.1103/PhysRevB.45.13244Vanderbilt, D., (1990) Phys. Rev. B, 41, p. 7892. , PRBMDO 0163-1829 10.1103/PhysRevB.41.7892Kresse, G., Hafner, J., (1993) Phys. Rev. B, 47, p. 558. , PRBMDO 0163-1829 10.1103/PhysRevB.47.558Kresse, G., Furthmüller, J., (1996) Phys. Rev. B, 54, p. 11169. , PRBMDO 0163-1829 10.1103/PhysRevB.54.11169Da Silva, A.J.R., Fazzio, A., Dos Santos, R.R., Oliveira, L.E., (2003) Physica B, 340-342, p. 874. , PHYBE3 0921-4526Da Silva, A.J.R., Fazzio, A., Dos Santos, R.R., Oliveira, L.E., (2004) J. Phys.: Condens. Matter, 16, p. 8243. , JCOMEL 0953-8984 10.1088/0953-8984/16/46/011Venezuela, P., Dalpian, G.M., Silva Da, R.A.J., Fazzio, A., (2001) Phys. Rev. B, 64, p. 193202. , PRBMDO 0163-1829 10.1103/PhysRevB.64.193202Wang, Q., Sun, Q., Jena, P., Kawazoe, Y., (2004) Phys. Rev. Lett., 93, p. 155501. , PRLTAO 0031-9007 10.1103/PhysRevLett.93.15550

VCube-PS: A Causal Broadcast Topic-based Publish/Subscribe System

In this work we present VCube-PS, a topic-based Publish/Subscribe system built on the top of a virtual hypercube-like topology. Membership information and published messages are broadcast to subscribers (members) of a topic group over dynamically built spanning trees rooted at the publisher. For a given topic, the delivery of published messages respects the causal order. VCube-PS was implemented on the PeerSim simulator, and experiments are reported including a comparison with the traditional Publish/Subscribe approach that employs a single rooted static spanning-tree for message distribution. Results confirm the efficiency of VCube-PS in terms of scalability, latency, number and size of messages.Comment: Improved text and performance evaluation. Added proof for the algorithms (Section 3.4

Specificity and performance evaluation of a novel RNA-FISH probe for the identification of Rhodotorula sp.

To distinguish Rhodotorula sp., from other microorganisms that produce the same type of alterations on CH materials, proper identification methods must be applied. RNA-fluorescence and in situ hybridization (RNA-FISH) has the potential to specifically identify the target microorganism of interest in complex microbial communities (it is based on hybridization of fluorescently-labeled oligonucleotide probes targeting to specific regions of the ribosomal RNA). Thus, the aim of this study was to design a novel genus specific RNAFISH probe against Rhodotorula sp., and to evaluate its specificity and performance both in silico and experimentally. This will contribute for facilitating Rhodotorula sp., identification in degraded CH materials by RNA-FISH.This work was co-financed by FCT through PTDC/BBB-IMG/0046/2014 project and SFRH/BPD/100754/2014 grant and by ALT20-03-0246-FEDER-000004-ALENTEJO 2020 project

On the crossroads of preservation

The seventeenth century São Miguel Chapel, located in a working class district of São Paulo city, had been in disuse for around 10 years. In the second half of the 1970s, the body managing this listed building faced the problem of how to revitalize it given the profile of the surrounding local population. The response to this problem, grounded on an initial ethnographic survey of local cultural production, involved mobilizing a substantial number of popular artists from the city's East Zone and led to the emergence of the Popular Movement of Art. Through an account of this experience and a debate with technical staff from CONDEPHAAT, the article explores some of the issues that situate the preservation of cultural heritage within a field of conflicting interests and ideologies.A capela seiscentista de São Miguel, localizada em bairro popular da cidade de São Paulo, mantivera-se sem uso por cerca de 10 anos. Na segunda metade dos anos 1970, colocava-se ao órgão gestor desse bem tombado o problema de sua revitalização em face do perfil da população do seu entorno. O equacionamento dessa questão, a partir de levantamento etnográfico sobre a produção cultural local, acarretou a mobilização de um número significativo de artistas populares da Zona Leste e a emergência do Movimento Popular de Arte. Por meio do relato dessa experiência e em debate com técnicos do Condephaat, são explorados alguns temas que inserem a preservação do patrimônio cultural num campo de conflito de interesses e luta ideológica