Graduate Program in Physics at UFSC, Florianópolis
  • Seminar with professor Rodney Marcelo do Nascimento – May 3, 2019 (friday) – 10:15 a.m.

    Publicado em 29/04/2019 às 10:55 AM

    THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

    A New Experimental-3D Physical Modeling Approach Predicting Favorable Biomaterial-Cell Interactions
    Rodney Marcelo do Nascimento
    Pós-doutorando – UFSC/FSC

    Abstract:

    Despite several decades of research on biomedical implant materials, the identification of predictive and robust in vitro characteristics of cell support ability and viabilities—as indicators of biocompatibility and future implant-tissue integration—remain elusive. This study addresses the phenomenology of cell implant interfaces based on experimental, theoretical and numerical analysis of cell response to functionalized bioceramic coatings of commercial titanium implants, cp-Ti. A variable spectrum of coatings having differing surface wettabilities, with optimized solid tension values, was obtained. Measured values were modeled and correlated to cell support ability and viabilities. The contributions of different physico-chemical aspects to cell viability were decoupled resulting in the identification of the polar component of the surface free energy as a significant and major cell-substrate effector. Furthermore, our results and the suggested model establish the thermodynamic interfacial free energy as an omnipotent measure that can be fully correlated to the morphology of an individual cell under numerical simulation matching empirical observations. Collectively, the 3D physical modeling reported herein can offer a new generic theoretical framework, using implementable mathematical simulation, towards the objective of rational biomaterial design that can improve next generation metal and ceramic implants.

    Date: May 3, 2019 – (friday) – Place: Sala 212 – Auditório do Departamento de Física – Time: 10:15 a.m.


  • Doctoral Thesis defence of Graziéle Bortolini – May 3, 2019 – friday – Times: 2:00 pm

    Publicado em 25/04/2019 às 07:51 AM

    The Physics Graduate Program invites everyone to:

    Defense of Doctoral Thesis

    Graziéle Bortolini

    MÉTODO DE DINÂMICA MOLECULAR NÃO-ADIABÁTICA BASEADO EM EHRENFEST E HÜCKEL ESTENDIDO

    Defense Committee:

    Prof. Dr. Robson da Silva Oliboni – (president) – (UFPel)
    Dr. Alberto Torres Riera Junior – (external member) – IFT
    Prof. Dr. Germano Heinzelmann – (local member) – UFSC/FSC
    Prof. Dr. Bernardo de Souza – (membro titular) – UFSC/QMC

    Date: May 3, 2019 – friday – Times: 2:00 pm – Place: Auditório do Departamento de Química


  • Admission Process Notice to the Graduate Program in Physics of the Federal University of Santa Catarina (PPGFSC/UFSC)

    Publicado em 25/04/2019 às 12:00 AM

    The Graduate Program in Physics of UFSC makes public the admission process’s notice to the Master and PhD programs entrance at the semester 2019/2.

    Registration will be made up April 25, 2019 until 5 pm on May 30, 2019, The PPGFSC regards the grade of the Brazilian Unified Exam of Physics Graduate Courses (Exame Unificado de Pós-Graduações em Física – EUF) to the entrance at the master and PhD programs.

    Click here to access the admission process website of the PPGFSC/UFSC


  • Seminar with professor Roberto Kalbush Saito – April 26, 2019 (tuesday) – 10:15 a.m.

    Publicado em 22/04/2019 às 02:49 PM

    THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

    VVV-WIT-07: outra estrela da Tabby ou um objeto de Mamajek?
    Roberto Kalbush Saito
    UFSC/FSC

    Abstract:

    Muitas, se não a maioria das estrelas, apresentam variações temporais de brilho. O estudo dessas variações nos ajuda na compreensão da estrutura interna das estrelas e dependendo da escala de tempo e perfil dessas variações estas são classificadas dentro das diversas classes de estrelas variáveis existentes.
    VVV-(What Is This?)-07 é uma estrela variável única recentemente descoberta entre as quase 1 bilhão de estrelas observadas pelo projeto VISTA Variables in the Vía Láctea (VVV) na região central da Galáxia. A VVV-WIT-07 apresenta uma sequência recorrente porém não periódica de perdas de brilho ao longo dos anos 2010-2018, com um possível eclipse profundo em julho de 2012 quando o brilho do objeto diminuiu em cerca 80%, o que não é esperado para uma estrela.
    As variações de brilho de VVV-WIT-07 são similares àquelas vistas na estrela J1407 (o objeto de Mamajek), onde acredita-se que uma estrela pré-sequência principal é eclipsada por um planeta com anéis muito maiores e densos que os de Saturno ou, alternativamente, à estrela KIC 8462852 (a estrela de Tabby), onde as variações de brilho poderiam estar associadas à presença de anéis irregulares de poeira, planetesimais, ou mesmo uma nuvem de cometas ao redor da estrela.
    Neste seminário apresentaremos nossa análise de VVV-WIT-07 baseada em dados do projeto VVV e VVV eXtended (VVVX), e complementada com dados de arquivo e observações espectroscópicas de seguimento. Cenários alternativos, nenhum dos quais totalmente consistente com os dados disponíveis, também serão apresentados.

    Date: April 26, 2019 – (tuesday) – Place: Sala 212 – Auditório do Departamento de Física – Time: 10:15 a.m.


  • Seminar with professor Prof. Giorgio Torrieri – April 17, 2019 (wednesday) – 3:00 p.m.

    Publicado em 11/04/2019 às 11:40 AM

    THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

    The ideal Hydrodynamic Limit and its extensions
    Prof. Giorgio Torrieri
    UNICAMP

    Abstract:

    We use effective field theory techniques to extend the ideal hydrodynamic limit to systems which, while strongly coupled and instantly thermalizing, exhibit characteristics which are usually not captured by transport theory. We concentrate on systems with non-negligible polarization as well as systems whose microscopic degrees of freedom exhibit non-Abelian gauge symmetry.

     

    Date: April 17, 2019 – (wednesday) – Place: Sala 114 – Sala de reuniões do Departamento de Física – Time: 3:00 p.m.


  • Defence of M.Sc. dissertation of Daniel Souza Lima – April 10, 2019 – 2:00 pm

    Publicado em 05/04/2019 às 11:59 AM

    The Physics Graduate Program invites everyone to:

    Defence of M.Sc. dissertation

    Daniel Souza Lima

    ANÁLISE DE DIAGRAMAS EM ESPALHAMENTO DUPLO DE PÁRTONS À ORDEM SEGUINTE À DOMINANTE

    Defense Commitee

    Prof. Dr. Emmanuel Gräve de Oliveira – (president) – UFSC/FSC
    Prof. Dr. Cristiano Brenner Mariotti – (external member) – FURG
    Prof. Dr. Jeferson de Lima Tomazelli – (local member) – UFSC/FSC
    Prof. Dr. Alexandre Magno Silva Santos – (external member) – UFSC/FSC

    Date: April 10, 2019 – wednesday – Time: 2:00 pm – Place: Sala 114 – Sala de Reuniões do Departamento de Física


  • Qualifying Examination for Doctoral Thesis of Patrick Antonio Morelo – April 10, 2019 – wednesday – 10 am

    Publicado em 05/04/2019 às 08:27 AM

    The Physics Graduate Program invites everyone to:

    Qualifying Examination for Doctoral Thesis

    Patrick Antonio Morelo

    ESTUDO DE MODELO PARA O RECONHECIMENTO DE FORMAS NO SISTEMA VISUAL E DE MODELO PARA SÍNDROME CARDÍACA DO QT LONGO

    Defense Committee:

    Prof. Dr. Marcelo Henrique Romano Tragtenberg – (president) – UFSC/FSC
    Profª. Drª. Fernanda Selingardi Matias – (external member) – UFAL
    Prof. Dr. Lucas Nicolao – (local member) – UFSC/FSC
    Prof. Dr. Germano Heinzelmann – (local member) – UFSC/FSC

    Date: April 10, 2019 – wednesday – Time: 10 am – Place: Sala 114 – Sala de Reuniões do Departamento de Física


  • Defence of M.Sc. dissertation of Marcos da Maia Vicente Júnior – April 9, 2019 – 2 pm

    Publicado em 04/04/2019 às 02:58 PM

    The Physics Graduate Program invites everyone to:

    Defence of M.Sc. dissertation

    Marcos da Maia Vicente Júnior

    BUSCAS POR TRÂNSITOS PLANETÁRIOS AO REDOR DE ESTRELAS ANÃS M DA REGIÃO DO BOJO GALÁCTICO

    Defense Commitee

    Prof. Dr. Roberto Kalbusch Saito – (president) – UFSC/FSC
    Prof. Dr. Rubens Tadeu Delgado Duarte – (external member) – UFSC/MIP/CCB
    Prof. Dr. Daniel Ruschel Dutra – (local member) – UFSC/FSC

    Date: April 9, 2019 – tuesday – Time: 2 pm – Place: Sala 114 – Sala de Reuniões do Departamento de Física


  • Seminar with professor Fabian Maucher – April 9, 2019 (tuesday) – 4:00 p.m.

    Publicado em 04/04/2019 às 11:09 AM

    THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

    Pattern-formation and Critical Behaviour in Dipolar Bose-Einstein Condensates
    Fabian Maucher

    Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark

    Abstract:

    Fabian Maucher, Yong-Chang Zhang, and Thomas Pohl
    Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark 
    The formation of patterns with long-range order continues to fascinate scientists from a broad range of natural sciences [1]. In this talk I will discuss pattern-formation in dipolar Bose-Einstein condensates. In this system the possibility of obtaining quantum states with self-organized long-ranged ordering can be facilitated by quantum fluctuations which suppress collapse and pave the way for supersolids in this system [2]. Here, supersolidity refers to a state of matter which displays long-range ordering whilst maintaining a large superfluid fraction. I will present recent results which focus on the critical behaviour of the superfluid-supersolid phase-transition [3] and the crucial role quantum fluctuations can play for the latter. We find that quantum fluctuations can alter the order of the phase transition from first- to second order. Furthermore, apart from the usual triangular lattice of density droplets, quantum fluctuations can give rise to a novel quantum state whose density distribution displays a honeycomb structure.

    [1] A. M. Turing, Philos. Trans. Royal Soc. B 23 237 (1952).
    [2] H. Kadau, M. Schmitt, M. Wenzel, C. Wink, T. Maier, I. Ferrier-Barbut, T. Pfau, Nature 530 194 (2016).
    [3] Y. Zhang, F.M., T. Pohl, arXiv:1903.06161v1 (2019).

    Date: April 9, 2019 – (tuesday) – Place: Sala 212 – Auditório do Departamento de Física – Time: 4:00 p.m.


  • Seminar with professor Profª. Drª. Débora Peres Menezes – April 5, 2019 (friday) – 10:15 am

    Publicado em 01/04/2019 às 11:25 AM

    THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

     

    A física nuclear como ferramenta para explicar magnetares e ondas gravitacionais

    Profª. Drª. Débora Peres Menezes
    UFSC/FSC

    Abstract:

    A neutron star was first detected as a pulsar in 1967. It is one of the most mysterious objects in the universe, with a radius of the order of 10 km and masses that can reach two solar masses. In 2017, a gravitational wave was detected (GW170817) and its source was identified as the merger of two neutron stars. The same event was seen in X-ray, gamma-ray, UV, IR, radio frequency and even in the optical region of the electromagnetic spectrum, starting the new era of multi-messenger astronomy. To understand neutron stars, an appropriate equation of state that satisfies bulk nuclear matter properties has to be used and GW170817 has provided some extra constraints to determine it.
    On the other hand, some neutron stars have strong magnetic fields up to 10 to the 15 Gauss on the surface as compared with the usual 10 to the 12 Gauss normally present in ordinary pulsars. They are called magnetars. While the description of ordinary pulsars is not completely established, describing magnetars poses a real challenge because the magnetic fields can produce an anisotropic equation of state. It is also known that low magnetic fields do not affect the equation of state and the resulting star macroscopic properties but they do affect the crust-core transition and the crust thickness with many consequences, as the explanation of glitches and the calculation of the Love number and quadrupole tidal polarisabilities.I will talk about the importance of the new constraints imposed by GW170817 in the determination of appropriate equations of state, possible ways to describe hadronic and quark matter subject to strong magnetic fields and the problems that lie ahead in the understanding of magnetars.

    Date: April 5, 2019 – (friday) – Place: Sala 212 – Auditório do Departamento de Física – Time: 10:15 am


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