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

Seminar with professor Ernesto F. Galvão – August 31, 2018 (friday) – 10:15 a.m.

27/08/2018 06:52

THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

Classical and quantum bounds on multi-system equality

Ernesto F. Galvão – UFF

Abstract:

I will describe how we can use logic to impose constraints on the probability of the conjunction (AND) of n propositions. This is an example of logical coherence inequalities that were first investigated by George Boole (1854). By taking each proposition to be about the equality of two systems, we obtain a logical coherence condition for the joint equality of multiple systems. I will then show that quantum mechanics violates this condition, and obtain bounds for the quantum violation. This enables us to bound the value of unmeasured two-state overlaps, with applications in quantum optics and quantum information.
This is joint work with Daniel Brod.

Date: August 31, 2018 – (friday) – Place: Sala 212 – Auditório do Departamento de Física – Time: 10:15 a.m.

Defence of M.Sc. dissertation of Eduardo Lucas Lorenzon – August 28, 2018 – 10:00 a.m.

23/08/2018 12:00

The Physics Graduate Program invites everyone to:

Defence of M.Sc. dissertation

Eduardo Lucas Lorenzon

SIMULAÇÃO DE MONTE CARLO PARA A TRANSIÇÃO DE FASE DE UMA LIGA DE FERRO E PLATINA

Defense Commitee

Prof. Dr. Lucas Nicolao – (president) – UFSC/FSC

Prof. Dr. Evy Augusto Salcedo Torres – (external member) – UFSC/FSC

Prof. Dr. Marcelo Henrique Romano Tragtenberg – (local member) – UFSC/FSC

 

Date: August 28, 2018 – tuesday – Time: 10:00 a.m. – Place: Sala 114 – Sala de Reuniões do Departamento de Física

Seminar with professor Prof. Dr. Thiago Cazati – August 24, 2018 (friday) – 10:15 a.m.

20/08/2018 14:53

THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

TÉCNICAS DE CARACTERIZAÇÃO DE MOLÉCULAS ORGANICAS PARA APLICAÇÃO EM CÉLULAS SOLARES

Prof. Dr. Thiago Cazati
Laboratório de Materiais Optoeletrônicos – LAMOe /DEFIS/UFOP

Abstract:

A conversão da energia luminosa em energia elétrica, realizadas pelas células solares orgânicas de heterojunções, envolve múltiplos processos optoeletrônicos que ocorrem em diferentes escalas temporais. Dentre os processos envolvidos destacam-se: a captação de radiação luminosa; a geração, difusão e dissociação do éxciton (par elétron buraco); A compreensão e a manipulação de tais processos eletrônicos são fundamentais para o aperfeiçoamento do desempenho das células solares. Nesta apresentação serão abordadas técnicas espectroscópicas empregadas na caracterização das propriedades optoeletrônicas de materiais orgânicos com potencial de aplicação em dispositivos fotovoltaicos, como a absorção UV-Vis, fluorescência estacionária e resolvida no tempo. A combinação de tais técnicas permite explorar, a partir das interações intermoleculares entre materiais do tipo aceitadoras e doadoras de carga, os processos decorrentes da geração do éxciton, incluindo a difusão e dissociação excitônica via transferência de carga (CT), e assim obter parâmetros experimentais como comprimento de difusão excitônica (LD) e a distância mínima entre doador e aceitador para a ocorrência de CT (RTC). Serão ainda apresentados resultados em andamento das pesquisas realizadas pelo Laboratório de Materiais Optoeletrônicos (LAMOe) da Universidade Federal de Ouro Preto e colaboradores, acerca deste assunto.

Date: August 24, 2018 – (friday) – Place: Sala 212 – Auditório do Departamento de Física – Time: 10:15 a.m.

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