Seminar with professor Marcelo Martinelli – October 11, 2018 (thursday) – 4:00 p.m.

10/10/2018 15:38

THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

Osciladores Paramétricos Óticos: para além do emaranhamento

Prof. Marcelo Martinelli

LMCAL – Instituto de Física – USP

Abstract:

O uso de osciladores paramétricos óticos como ferramenta multi-uso em ótica quântica deve-se ao conhecimento profundo que temos deste sistema desde meados dos anos 80, aliado à simplicidade de sua descrição. Esta aparente simplicidade vem do fato de que com cristais não-lineares podemos trabalhar em um regime de resposta linearizada do sistema, capaz de gerar estados comprimidos, ou dois campos emaranhado, ou até três campos emaranhados, a partir do acoplamento entre campos do bombeio e os campos convertidos em comprimentos de onda mais longos. Vamos mostrar que mesmo neste caso mais simples, podemos ter o emaranhamento de até seis modos do campo, em uma rede complex de emaranhamento. E vamos discutir como usando vapores atômicos em lugar de cristais podemos revelar uma nova região de exploração de efeitos além da aproximação linear.

Date: October 11, 2018 – (thursday) – Place: Sala 212 – Auditório do Departamento de Física – Time: 4:00 p.m.

Seminar with professor Peter Skabara – September 27, 2018 (thursday) – 10:15 a.m.

23/09/2018 08:51

THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

Prof Peter Skabara is the Ramsay Chair of Chemistry at the University of Glasgow and the Deputy-Editor-in-Chief and Chair of the Journal of Materials Chemistry C. He is the author of over 180 papers, focusing on the synthesis and application of new materials for organic electronics. Prof Skabara is the recipient of a Royal Society Wolfson Research Merit Award holder, which was gained for his research into monodisperse macromolecular conjugated materials for photonic applications.

Twisted and other non-conventional conjugated architectures: switching functionality from charge transport to photonic applications

Prof Peter Skabara
Ramsay Chair of Chemistry at the University of Glasgow

Abstract:

Keywords: Conjugated macromolecules, electron donors, oligofluorene, oligothiophene, charge transport
Summary: The synthesis and properties of some complex star-shaped conjugated architectures will be reported.

We have synthesised a series of well-defined, monodisperse oligothiophenes bearing a bridging, fused tetrathiafulvalene (TTF) unit and the much lesser known tetrathiocin heterocycle. The materials exhibit complex redox chemistry for longer conjugated analogues and they can be oxidised up to the octacation within a relatively narrow potential window. The methodology used to construct the end-capped oligothiophene chains has enabled us to explore a new range of Ge centred cruciform structures, in which the central bridging atom of the molecule provides a tetrahedral geometry. Whilst these materials are candidates for applications requiring good charge transport properties, we have also been investigating oligofluorene star-shaped structures for photonics and sensor applications and we report several series of new materials with multifunctional architectures. In this presentation we report on the synthesis, self-assembly and properties of these monodisperse macromolecules.

Date: September 27, 2018 – (thursday) – Place: Sala 114 – Sala de reuniões do Departamento de Física – Time: 10:15 a.m.

Quinto Encontrinho sobre Física de Hádrons – September 18, 2018 (tuesday) – Das 9 horas às 11h30min

13/09/2018 11:18

THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

Quinto Encontrinho sobre Física de Hádrons

Abstract:

9:00 – 9:20 – Kauan Marquez (D)– Transição de fases e conversão estelar
9:20 – 9:30 – Maylon Morais (IC)– Estrelas de neutrons e o gás ideal
9:30 – 9:50 – Tadeu Pires (IC)– Equações de Estado
9:50 – 10:15 – Luiza Spanamberg (IC)+ Betânia Backes (IC) – Ordem de magnitude da física que descreve estrelas de nêutrons

Intervalo

10:30- 10:50 – Carline Biesdorf (M)– Transição de fases e o diagrama da QCD
10:50- 11:10 – Clésio Evangelista (D)– Da TOV a gravidade modificada
11:10 -11:30 – César Vasquez Flores (PD) – Estrelas compactas na era das ondas gravitacionais
Com a participação especial de Isabella Marzola (M) e ajuda de Karina Buss (E) e Beatriz Nattrodt (E)

PD= pós-doutorando / D= doutorando / M=mestranda / IC= alunos de iniciação científica / E = alunos de extensão

Date: September 18, 2018 – (tuesday) – Place: Sala 114 – Sala de reuniões do Departamento de Física – Time: Das 9 horas às 11h30min

Seminar with professor Osame Kinouchi – September 18, 2018 (friday) – 10:15 a.m.

11/09/2018 08:12

THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

Stochastic oscillations, power law avalanches and dragon kings in quasi-critical systems

Prof. Dr. Osame Kinouchi
Departamento de Física – FFCLRP – USP

Abstract:

In the last decade, several models with network adaptive mechanisms (link deletion-creation, dynamic synapses, dynamic gains) have been proposed as examples of self-organized criticality (SOC) to explain neuronal avalanches. However, all these systems present stochastic oscillations hovering around the critical region that are incompatible with standard SOC and has been called self-organized quasi-criticality (SOqC). Here we make a linear stability analysis of the mean field fixed points of a SOqC model of discrete time stochastic spiking neurons. Firing rate adaptation, produced by dynamic neuronal gains, tunes the system toward the critical region. We find that the fixed points correspond to barely stable spirals that turn out indifferent at criticality where a Neimark-Sacker bifurcation occurs. This near indifference means that finite-size fluctuations can excite stochastic oscillations and avalanches, producing a mechanism for the emergence of dragon king events. The coexistence of these different types of neuronal activity is an experimental prediction that differs from standard SOC models.

Date: September 18, 2018 – (friday) – Place: Sala 212 – Auditório do Departamento de Física – Time: 10:15 a.m.

Qualifying Examination for Doctoral Thesis of Igor Dornelles Schoeller Siciliani – September 13, 2018 – thursday – 2 p.m.

09/09/2018 17:03

The Physics Graduate Program invites everyone to:

Qualifying Examination for Doctoral Thesis

Igor Dornelles Schoeller Siciliani

Aplicações de Mecânica Estatística em Econofísica, Mineração de Textos e Neurociência

Defense Committee:

Prof. Dr. Marcelo Henrique Romano Tragtenberg – (president) – UFSC/FSC
Prof. Dr. Osame Kinouchi Filho – (external member) – USP
Prof. Dr. Lucas Nicolao – (local member) – UFSC/FSC
Prof. Dr. Eraldo Sérgio Barobosa da Silva – (local member) – UFSC/CMN

Date: September 13, 2018 – thursday – Time: 2 p.m. – Place: Auditório Airton Silva – (piso térreo do Departamento de Matemática)

Defence of M.Sc. dissertation of Thomas Zerrenner Flórido – September 12, 2018 – 2:00 p.m.

06/09/2018 14:53

The Physics Graduate Program invites everyone to:

Defence of M.Sc. dissertation

Thomas Zerrenner Flórido

ANALYSIS OF EMISSION LINES IN GALAXIES: THE DIFFUSED IONIZED GAS IN MaNGA

Defense Commitee

Profª. Drª. Natalia Vale Asari – (president) – UFSC/FSC
Prof. Dr. Rogemar André Riffel – (external member) – UFSM
Prof. Dr. Abilio Mateus Junior – (local member) – UFSC/FSC

Date: September 12, 2018 – wednesday – Time: 2:00 p.m. – Place: Sala 202 – Departamento de Matemática

Defence of M.Sc. dissertation of Mateus Tomazini Kinasz – September 11, 2018 – 2:00 p.m.

06/09/2018 10:05

The Physics Graduate Program invites everyone to:

Defence of M.Sc. dissertation

Mateus Tomazini Kinasz

Defense Commitee

Prof. Dr. Marcelo Henrique Romano Tragtenberg – (president) – UFSC/FSC
Prof. Dr. Nuno Miguel Melo Crokidakis Peregrino – (external member) – UFF
Prof. Dr. Nilton da Silva Branco – (local member) – UFSC/FSC

Date: September 11, 2018 – tuesday – Time: 2:00 p.m. – Place: Sala PG-1 – Departamento de Química (subsolo)

Defence of M.Sc. dissertation of Laura Antonia Barth Martinez – September 5, 2018 – 9:00 a.m.

31/08/2018 08:00

The Physics Graduate Program invites everyone to:

Defence of M.Sc. dissertation

Laura Antonia Barth Martinez

Phase transition in a layered neuronal network

Defense Commitee

Prof. Dr. Marcelo Henrique Romano Tragtenberg – (president) – UFSC/FSC
Prof. Dr. Marco Aurélio Pires Idiart – (external member) – UFRGS
Prof. Dr. Germano Heinzelmann – (local member) – UFSC/FSC

Date: September 5, 2018 – wednesday – Time: 9:00 a.m. – Place: Sala 114 – Sala de Reuniões do Departamento de Física

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