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X-WR-CALNAME:Department of Physics and Astronomy
X-ORIGINAL-URL:https://physics.sciences.ncsu.edu
X-WR-CALDESC:Events for Department of Physics and Astronomy
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DTSTART:20230312T070000
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240903T160000
DTEND;TZID=America/New_York:20240903T170000
DTSTAMP:20260509T090958
CREATED:20240717T150344Z
LAST-MODIFIED:20240903T201023Z
UID:51237-1725379200-1725382800@physics.sciences.ncsu.edu
SUMMARY:RPT Colloquium: Ian Roederer
DESCRIPTION:Title: The Origin of the Heaviest Elements \nAbstract: Understanding the origin of the elements remains one of the major challenges of modern astrophysics. I will introduce some of the open questions in the field and present several major advances from recent years. These advances include measuring the most complete heavy element chemical inventory beyond the Solar System and the first detection of transuranic fission fragments in stars. These advances can help shape the experiments carried out by the next generation of extremely large optical telescopes and future space flagship missions in the 2030s and 2040s. \n 
URL:https://physics.sciences.ncsu.edu/event/rpt-colloquium-ian-roederer/
LOCATION:Riddick 325\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia,In The Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240909T160000
DTEND;TZID=America/New_York:20240909T170000
DTSTAMP:20260509T090958
CREATED:20240717T151511Z
LAST-MODIFIED:20240904T162858Z
UID:51247-1725897600-1725901200@physics.sciences.ncsu.edu
SUMMARY:RPT Colloquium: Richard Longland
DESCRIPTION:Title: The Long Wait for T Coronae Borealis – How Nuclear Physics Informs Our Understanding of Astrophysical Phenomena \nAbstract: Classical novae are the result of hydrogen-rich matter exploding on the surface of a white dwarf. That matter is accreted from a nearby companion star in a binary system\, building a dense layer that eventually explodes as nuclear reactions ignite the material. While they are bright explosions\, novae do not release enough energy to completely disrupt either of the stars in their system\, thus opening the possibility of re-igniting at some point in the future. T Coronae Borealis is the closest such “recurrent nova” with a recurrent time of 80 years. At a distance of just 2600 lightyears from Earth\, when it does explode astronomers expect it to be a gold mine of information with high-resolution spectroscopic instruments and space-based gamma-ray observatories eagerly awaiting data. T Coronae Borealis is now close to overdue its next outburst! However\, these observations of nova explosions can only be used to constrain the physical processes buried deep inside if they can be reliably compared with stellar models. I will detail some of our recent work on constraining stellar models through their nuclear reaction inputs. At the Triangle Universities Nuclear Laboratory we measure the nuclear structure of astrophysical isotopes at high precision. I will describe some experiments that lead to better understanding of nuclear processes in novae\, how we identify the key reactions\, and how the impacts of our measurements are quantified. Finally I will look to the future\, and how upgrades are underway to expand our capabilities for measuring some of the more challenging reactions important for nuclear astrophysics.
URL:https://physics.sciences.ncsu.edu/event/rpt-colloquium-richard-longland/
LOCATION:Riddick 301\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia,In The Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240912T120000
DTEND;TZID=America/New_York:20240912T130000
DTSTAMP:20260509T090958
CREATED:20240717T143548Z
LAST-MODIFIED:20240830T144752Z
UID:51231-1726142400-1726146000@physics.sciences.ncsu.edu
SUMMARY:CMB Seminar: Ravi Gautam
DESCRIPTION:Title: Microscopic Insights into the Mechanics of Granular Materials \nAbstract: The widespread occurrence of granular materials in nature (like soil and beach sand) and industries (such as cement and pharmaceuticals) has spurred extensive research into their mechanical behavior. Key phenomena\, such as stress saturation with depth\, rate-independent shear stress\, and large stress fluctuations\, are well documented. Our study\, based on a combination of particle dynamics simulations and experiments\, investigates the emergence of these features from the characteristics of grain structure. We adopted tools from network analysis to quantify the particle arrangement and its evolution. While previous studies often treat particles as rigid\, our analysis reveals that the stress within the material is fundamentally related to the elastic deformation of the particles. To investigate stress transmission in static columns filled under gravity\, we construct a coarse-grained representation of the force network\, called “force lines”. These lines demonstrate lateral transmission of the load within the material\, caused by anisotropy in the contact network\, and resulting in the saturation of the stress with depth. Our simulations of simple shear show that the material exhibits stick-slip dynamics: the contact network is stable in the stick phases\, and the network rearranges in short-lived slip phases. A cascade failure mechanism is proposed that unveils a system-spanning loss of stability in the network during the slip phases. This microscopic description of flow explains the rate independence of stress and establishes stress fluctuations as a hallmark of the slow granular flow regime. Further\, by treating the granular medium as an elastic continuum in the stick phase\, we show that dilatancy results from anisotropy in the grain network. These findings emphasize the relationships between the microstructure and the mechanical response of grain assemblies.
URL:https://physics.sciences.ncsu.edu/event/cmb-seminar-ravi-gautam/
LOCATION:Bureau of Mines 201
CATEGORIES:CMB Seminar,In The Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240916T130000
DTEND;TZID=America/New_York:20240916T143000
DTSTAMP:20260509T090958
CREATED:20240911T163129Z
LAST-MODIFIED:20240911T163300Z
UID:51468-1726491600-1726497000@physics.sciences.ncsu.edu
SUMMARY:Preliminary Exam - Canberk Guvendik
DESCRIPTION:Gauge theory on Noncommutative Torus
URL:https://physics.sciences.ncsu.edu/event/preliminary-exam-canberk-guvendik/
LOCATION:Riddick 202 (Grad Suite conference room)
CATEGORIES:In The Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240916T160000
DTEND;TZID=America/New_York:20240916T170000
DTSTAMP:20260509T090958
CREATED:20240717T151834Z
LAST-MODIFIED:20240717T151834Z
UID:51249-1726502400-1726506000@physics.sciences.ncsu.edu
SUMMARY:RPT Colloquium: Sebastian König
DESCRIPTION:Title and Abstract details are forthcoming. \n 
URL:https://physics.sciences.ncsu.edu/event/rpt-colloquium-sebastian-konig/
LOCATION:Riddick 301\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia,In The Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240919T120000
DTEND;TZID=America/New_York:20240919T130000
DTSTAMP:20260509T090958
CREATED:20240830T173149Z
LAST-MODIFIED:20240913T130149Z
UID:51440-1726747200-1726750800@physics.sciences.ncsu.edu
SUMMARY:CMB Seminar: Amy Maddox
DESCRIPTION:Title: Connecting Molecules and Forces with Rings and Loops \nAbstract: Animal cell shape is dictated by the actomyosin cytoskeleton\, including the membrane-apposed cortex. The molecular parts list of the cortex is well-characterized\, and included the dynamic F-actin polymers\, myosin family motor proteins\, and myriad non-motor crosslinkers that scaffold the cytoskeleton\, the membrane\, and regulatory proteins. It is less well-understood how the cytoskeleton is arranged and re-arranged to generate the forces that establish and change cell shape. We use the highly dynamic cytokinetic ring and the dynamically stable cortex of a germline syncytium as models for the actomyosin cytoskeleton. We use C. elegans as a fast\, small\, cheap\, optically clear\, and accessible model organism for these and other studies. We measure the kinetics of cell shape change and protein enrichment\, in control cells and those depleted by RNAi of target proteins. Via collaborations\, we use various mathematical modeling approaches in which the actomyosin cytoskeleton is approximated as an active gel. We use measurements to constrain our models\, and compare in vivo measurements to model outputs to test our model assumptions. Our multidisciplinary work makes testable predictions about cytoskeletal organization and remodeling\, the magnitude of forces\, and conserved proteins’ roles.
URL:https://physics.sciences.ncsu.edu/event/cmb-seminar-amy-maddox/
LOCATION:Bureau of Mines 201
CATEGORIES:CMB Seminar,In The Department
ORGANIZER;CN="Julio Monti Belmonte":MAILTO:jbelmon2@ncsu.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240925T080000
DTEND;TZID=America/New_York:20240925T170000
DTSTAMP:20260509T090958
CREATED:20240925T182311Z
LAST-MODIFIED:20240925T182327Z
UID:51509-1727251200-1727283600@physics.sciences.ncsu.edu
SUMMARY:CMB Seminar: Erin Crites
DESCRIPTION:Title: Photothermal Heating with Nanoparticles: Enhancing Electrical Conductivity in Composites and Water Vapor Formation in Hydrogels \nAbstract: Photothermal heating is the conversion of light into heat. When nanoparticles are embedded in materials\, we are able to precisely control localized heating in a sample using photothermal heating of the nanoparticles. We use this heating in two areas to enhance material properties and processes. We will first discuss carbon nanotube polymer composites\, which are desirable for their high electrical and thermal conductivity. However\, in order to form a percolated network\, nanotubes are coated with a surfactant to improve dispersion\, thus diminishing the ideal conductivity of the composite. Our work uses surfactant to disperse multi-walled carbon nanotubes (MWCNTs)\, then utilizes photothermal heating of the MWCNTs to remove inter-particle material to enhance the conductivity. We will also present work on water vapor formation in hydrogels. Hydrogels have been studied as a driver in water purification processes and we propose using photothermal heating of nanoparticles to aid in water recovery step of these processes. We photothermally heat a sodium acrylate and N-isopropylamide hybrid embedded with gold and melanin nanoparticles and show changes in water vapor output efficiency when compared to traditional oven heating. We further investigate the photothermal capabilities of melanin nanoparticles as a biologically compatible photothermal heater. These findings utilize the same fundamental mechanism- photothermal heating- to offer potential improvements for industrial and humanitarian efforts alike.
URL:https://physics.sciences.ncsu.edu/event/cmb-seminar-erin-crites/
LOCATION:Bureau of Mines 201
CATEGORIES:CMB Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240927T100000
DTEND;TZID=America/New_York:20240927T120000
DTSTAMP:20260509T090958
CREATED:20240924T191832Z
LAST-MODIFIED:20240924T191832Z
UID:51492-1727431200-1727438400@physics.sciences.ncsu.edu
SUMMARY:Final Defense - Christian White
DESCRIPTION:Development of a solid deuterium UCN source and associated components for studies of systematic effects in nEDM measurements
URL:https://physics.sciences.ncsu.edu/event/final-defense-christian-white/
LOCATION:Riddick 202 (Grad Suite conference room)
CATEGORIES:In The Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240930T110000
DTEND;TZID=America/New_York:20240930T123000
DTSTAMP:20260509T090958
CREATED:20240924T192040Z
LAST-MODIFIED:20240924T192041Z
UID:51494-1727694000-1727699400@physics.sciences.ncsu.edu
SUMMARY:Preliminary Exam - Kaixin Song
DESCRIPTION:Experimental Studies of 24Mg States and Their Impact on Nucleosynthesis in Globular Clusters
URL:https://physics.sciences.ncsu.edu/event/preliminary-exam-kaixin-song/
LOCATION:Riddick 202 (Grad Suite conference room)
CATEGORIES:In The Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240930T160000
DTEND;TZID=America/New_York:20240930T170000
DTSTAMP:20260509T090958
CREATED:20240917T180433Z
LAST-MODIFIED:20240917T180433Z
UID:51477-1727712000-1727715600@physics.sciences.ncsu.edu
SUMMARY:Colloquium: Eve Vavagiakis
DESCRIPTION:Title: A New Generation of Millimeter and Submillimeter Observations for Cosmology and Astrophysics\n\nAbstract: In our exciting era of experimental cosmology\, rapid developments in instrumentation and highly sensitive superconducting detectors have provided a wealth of arcminute-scale cosmic microwave background (CMB) data. These measurements are transforming our understanding of the evolution of our cosmos. I will present recent results from the Atacama Cosmology Telescope and discuss how our high-resolution CMB maps are at the frontier of Sunyaev-Zel’dovich effect science. I will also summarize the design and status of first light instruments for the CCAT Observatory and the Simons Observatory. These experiments will provide unparalleled measurements of the millimeter and submillimeter sky\, offering rich opportunities for cross-correlation studies with upcoming surveys and paving the way towards CMB-S4\, the next-generation ground-based CMB experiment. This will enable novel multifrequency science in the coming years\, testing cosmological models and opening new windows on galaxy evolution and fundamental physics.\n\nHost: Kasey Wagoner
URL:https://physics.sciences.ncsu.edu/event/colloquium-eve-vavagiakis/
LOCATION:Riddick 301\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia,In The Department
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