Physics Events

Dr. Justin Bankert
Astrophysical Binary Systems
Monday, May, 2:00-3:00 p.m.
MSCX -Room 1114

In this presentation, I describe the nature of accretion disks. Specifically, I describe the formation of accretion disks and the processes which occur within a disk that allow material to move inward towards central accretion. I also discuss the nature of astrophysical binary systems and their importance on a variety of mass and size scales. Combining these two topics, I discuss my thesis work, which involved studying the effect of circumbinary accretion disks on the evolution of a central binary system. Finally, I talk about some of the projects that I have worked on with undergraduate students in my time at Angelo State University.

John Weis
EPD Specialist
Department of Aerospace Engineering
NASA Marshall Space Flight Center
Tuesday, March 26, 2019
4:00-5:00 p.m.
MSCX -Room 114

Photograph by Dr. Maurice Clark

John Weis
EPD Specialist
Department of Aerospace Engineering
NASA Marshall Space Flight Center
Tuesday, December 4
3:00-4:00 p.m.
MSCX -Room 114

 

Have you been wondering what NASA is up to? Join NASA Education specialist John Weis as he discusses NASA's plans to send people back to the Moon in the next few years and then on to Mars before 2040. The presentation will focus on transportation systems including the Space Launch System, Orion Crew Capsule and Exploration Ground Systems.

Saturday, October 27

Dr. Qurat Ul Ann Ijaz led the class that introduced to the scouts, the basics of static and current electricity, basic magnetism and the connection between the two. The students also learned about basic safety measures to be exercised when dealing with electrical equipment.

 

Rakshak explained the basics of magnetic field, their origin and then performed a demonstration with the Van De Graff generator.

Dr. Michael J. Bozack
NSF Center for Advanced Vehicle Electronics and Extreme Environment Electronics (CAVE3)
Auburn University Auburn, AL 36849
Wednesday, October 17
3:00-4:00 p.m.
MSCX -Room 114

 

Whiskers are single crystal electrically conductive eruptions that spontaneously grow from the surface of plated films. They have resulted in billions of dollars of liability to electronic circuitry, particularly those which operate in extreme environments. Whiskers are problematic for electronic assemblies since they can breach components and create short circuits.

Wednesday, October 24
4:00-5:00 p.m.
MSCX -Room 214

 

Ty Naquin, a junior physics major and Computer Science minor, presented his research on "Drug Delivery Nanoparticles", a project he worked on as a REU student at Cleveland State University. He explained the reversible phase transition that he observed in the Elastin-like polypeptides (ELPs) which can be used to synthesize armed polymers with arms made up of ELPs. He talked about the different properties of such polymers under different conditions of temperature , pH and salt concentration he studied via dynamic light scattering and spectroscopy.

 

Rakshak Adhikari, a junior physics and mathematics major, presented his research on " Seeing the invisible: study of interactions of geomagnetic storms with earth's magnetosphere", his summer research project at Auburn university. He explained the dynamic nature of earth's magnetosphere, the properties of ring current and the importance of such a study. He talked about the satellite based NASA sensors that detected Energetic Neutral Atoms and the complex computational procedure that extracts the ion density from the observed data.

4:00-5:00 p.m.
MSCX -Room 214

Madelynn Lytle presented her research on Light Capture in Cone Photoreceptors using 2-photon stimulation that she worked on at the University of Alabama in Birmingham.

 

Donavan Ebersole presented his summer research on Measuring Viscosity using a Damped Harmonic Oscillator at Troy University in collaboration with Dr. James Sanders and Ty Naquin.

 

Sebastian Lee presented his research on Dish Photography of the BMX Telescope that he worked on this summer at the Brookhaven National Lab.

Caroline Howell was awarded the Student Speaker Award for her presentation on Mapping Sound Waves at the Pi Mu Epsilon (PME) Conference in Denver, Colorado. (Research Advisor: Dr. Sanders)

Rakshak Adhikari and Dr. Maurice Clark at the Society for Astronomical Sciences symposium on Telescope Science (Ontario, California)

 Dr. Maurice Clark presented his paper titled "Nine new variable stars".

Rakshak Adhikari presented his paper titled " Modelling WUMa Eclipsing Binary Stars using Binary Maker 3.0".

     

Murphree Park, 4/8/2018

Dr. Hassan Kesserwani (M.D)
Thursday, April 26
3:00-4:00 p.m.
MSCX -Room 114

 

Dr. Hassan Kesserwani is a renowned neurologist and a practicing physician in Dothan, Al. Dr. Kesserwani is currently pursuing a Master's Degree in mathematics in his spare time. He will deliver a general audience talk that will introduce students to the mathematical formalism behind General Relativity.

John Weis
EPD Specialist
Department of Aerospace Engineering
NASA Marshall Space Flight Center
Tuesday, February 13
3:00-4:00 p.m.
MSCX -Room 114

 

Have you ever wondered where we all came from? Join NASA Educator Professional Development Collaborative specialist John Weis and explore the linkage between the life cycle of stars and the elements of the periodic table.

John Weis
EPD Specialist
Department of Aerospace Engineering
NASA Marshall Space Flight Center
Wednesday, November 29
3:00-4:00 p.m.
MSCX -Room 114

What happened after the Big Bang? Join NASA Educator Professional Development Collaborative specialist John Weis on a tour of the life cycle of stars of all sizes and temperatures.

Dr. Vrishank Raghav
Assistant Professor
Department of Aerospace Engineering
Auburn University
Wednesday, October 25
3:00-4:00 p.m.
MSCX -Room 114

Unsteady flows are common in both engineering and biological applications. This talk focusses on understanding the physics of unsteady flows across disciplines by using experimental techniques. The primary focus is on unsteady flow occurring on helicopters and wind turbines due to flow separation leading to dynamic-stall (DS) and on the unsteady flow in the cardiovascular system. Results from recent experiments that capture the significant effects of rotation using Stereoscopic Particle Image Velocimetry will be presented. The talk will also discuss in detail some of the recent work on understanding the fluid physics of unsteady flows in the human cardiovascular system.

Dr. Vrishank Raghav is an Assistant Professor in the Department of Aerospace Engineering at Auburn University. Previously he was an American Heart Association Postdoctoral Fellow at Georgia Institute of Technology, where his work was on understanding the effect of hemodynamics on the progression of congenital heart valve disease. Before diversifying into biological flows, he obtained his Ph.D. in the School of Aerospace Engineering at Georgia Tech in 2014. His dissertation was focused on understanding the three-dimensional nature of unsteady flow separation occurring on wind turbine and helicopter rotor blades and was chosen by Sigma-Xi, the Scientific Research Society as the 2015 Best Georgia Tech Ph.D. Thesis.

Richard Sizelove (Math Major)
(moderated by Dr. Govind Menon)
Fall Semester, every Tuesday at 2:00 p.m., Room 318

Student presentations moderated by Dr. Govind Menon
Fall Semester, every Tuesday at 1:00 p.m., Room 318

Dr. David Hilton
Associate Professor
Department of Physics
The University of Alabama at Birmingham
Tuesday, October 3
3:00-5:00 p.m.
MSCX -Room 114

Two-dimensional materials have attracted significant interest recently as candidates to replace silicon in microelectronics. In the past few years, there have been a number of new monolayer materials systems that have attracted significant interest, including graphene (monolayer carbon), silicine (monolayer silicon), germanene (monolayer germaium), and stanene (monolayer tin), black and blue phosphorous, and dichalcogenicdes (MoS2, MoSe2, WS2 and WSe2), among a rapidly growing list of materials. These materials, however, are heavily disorder-dominated systems with measured electron mobility of ≪1000 cm2 V-1 s-1 that can be largely associated with the extrinsic properties (defects, surface adsorption, and other lattice imperfections). The modulation doped gallium arsenide two-dimensional electron gas has seen extensive study and the growth of high quality samples with mobilities exceeding 106 cm2 V-1 s, which provides a model system to study the electronic and optical properties of two-dimensional materials in the “clean” limit.
Ultrafast spectroscopic techniques are a frequently employed and powerful technique that is used to unravel complex and often competing processes in condensed matter systems on a femtosecond time scale. These study a wide range of excitations over the electromagnetic spectrum from the terahertz to the x-ray with subpicosecond time resolution. These results will be needed for future electronics design in these materials. In this talk, I will discuss our work using terahertz time-domain spectroscopy to study Landau level populations and coherences in high mobility two-dimensional semiconducting systems. We model our results using the Optical Bloch Equations to determine the dephasing lifetime as a function of temperature and explain our low temperature results using ionized impurity and bound interface charge scattering in the conducting layer. In the second part of my talk, I will discuss our recent work to study these materials in high magnetic field using the 25 Tesla Split-Florida Helix magnet at the National High Magnetic Field Lab. Our results reveal a complex interplay between conventional (electron transport) and complex (many-body) electronic interaction on an extremely fast time scale.
This work has been funded by NSF CAREER (2DEG Materials Physics, DMR-1056827) and the Department of Energy/Basic Energy Sciences (Instrument Development, DE-SC0012635). Additional funding for graduate students working on these projects comes from the Department of Education GAANN (P200A090143). A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by National Science Foundation Cooperative Agreement No. DMR-1157490 and the state of Florida. This work was performed, in part, at the Center for Integrated Nanotechnologies, a U.S. Department of Energy, Office of Basic Energy Sciences user facility.
After Dr. Hilton's talk, he is interested in talking to students with interest in attending graduate school. In addition to recruiting for UAB's program, he has been affiliated with a number of different programs in his career and would be willing to talk about gradate school admission requirements, how to choose a school, what to look for in a thesis advisor and project, and what future jobs are available.

Dave Hilton received B.S. (1997) and M.S. (1999) degrees in Optics from the University of Rochester. He received a M.S. (2001) and Ph.D. (2002) in Applied Physics from Cornell University. From 2002 to 2006, he was a postdoctoral researcher at Los Alamos National Laboratory in New Mexico, where his research focus shifted to terahertz spectroscopy of correlated electronic systems. From 2006 to 2007, he was a postdoctoral researcher at Rice University, where his interests included the development of novel spectroscopic measurement techniques for high-resolution spectroscopy in high magnetic fields. He joined the faculty as Assistant Professor of Physics at the University of Alabama at Birmingham and was promoted to Associate Professor in 2013. His research program focuses on the study of insulator-to-metal phase transitions in transition metal oxides and ultrafast investigations of high mobility 2DEGs and dichalcogenides.

Photo by Dr. Maurice Clark

 

Al Allenback and friend

 

         

Dr. Bateman's Retirement Party

Dr. Maurice Clark
Thursday, April 27
4:00-5:00 p.m.
MSCX -Room 114

Astronomy is more than just "looking at stars". The universe is a giant laboratory that allows us to explore nature in conditions far more extreme than can be produced on Earth. It is the most fundamental of all sciences and the most all-encompassing. In addition, our understanding of the universe is expanding at an exponential rate. Yet astronomy is also the most democratic of sciences. Its beauty and its wonder are open to all, and not just the scientist using giant telescopes. Examples of research opportunities with modest equipment are presented as are important discoveries by non-scientists through Citizen Science projects.

John Weiss
NASA, Marshall Space Flight Center
Wednesday, April 19
4:00-5:00 p.m.
MSCX -Room 114

This presentation gives a brief overview of current events at NASA including current and near-term missions, new discoveries and long-term goals of the agency. Topics covered will include unmanned missions, human space flight, aeronautics research and their impacts on the standard of living in the United States.

Watch the presentation here.

Saturday, April 15

Back row (left to right): Joanna Campbell, Ty Naquin, Govind Menon, Andrew Crokett, Pawan Khanal, Yogesh Niraula, Pawan Khatiwada, Bishal Niroula, Rakshak Adhikari, Aashish Kafle
Front row (left to right): Aayush Nepal, Alex Brassington, Regan Bhatta, Nilotpal Mukherjee

All day Tuesday, March 28
Location: TBA

TeachSpin's “Food Truck for the Physics Mind” is a rolling laboratory, bringing to you a hands-on encounter with some classic physics phenomena. Below we list the ‘cast of characters':
1) Diode-Laser Spectroscopy: Tuning the interaction of laser light with atoms
2) Two-Slit Interference: A quantum ‘thought experiment' turned actual
3) Magnetic Force: Confronting the most persistent misconception in E&M
4) Optical Pumping: Enabling the radio-frequency spectroscopy of atoms
5) Quantum Analogs: The quickest way to build intuition for quantum-relevant wave behavior
6) Modern Interferometry: Exploiting micrometer, and nanometer, sensitivity to displacement
7) Noise Fundamentals: When is electronic noise not a nuisance, but a resource?
8) Fourier Methods: What can you learn by ‘thinking in frequency space'?
9) Earth's-Field Nuclear Magnetic Resonance: The singing of the waters
10) Torsional Oscillator: Exploring damped, driven, simple harmonic motion
11) Faraday Rotation: Proving there's magnetism in the electromagnetism of light
12) Signal-Processor/Lock-In Amplifier: How to extract signals form noise
13) Magnetic Torque: The surprising results of magnetic torque vs. angular momentum
14) Nuclear Magnetic Resonance: What's the basis of the NMR technique in physics, chemistry, and MRI?
15) Ultrasonics: What sound of MegaHertz frequencies can do for you
16) Muon Physics: Particle Physics at your fingertips, any time and any place

Dr. Ryochi Kawai
University of Alabama at Birmingham
Thursday, March 16
4:00-5:00 p.m.
MSCX -Room 114

Regardless of whether they are alive or inanimate, things on the Earth are all made from molecules which are in turn made of protons, neutrons, and electrons. Then, both living and lifeless systems should obey the same laws of physics. In other words, we should be able to explain how living systems work using physics alone. However, we are not sure if the currently known laws and principles of physics are sufficient to explain the life. We are still far from being able to answer this question since we haven't explained much of the biological processes with physics yet. In order to discover a possible new physics, we need to try to explain the whole of living systems with the present physics. In this talk, I will try to introduce several interesting processes in biological cells which physicists are trying to explain using the known laws of physics, including molecular motors driven by non-equilibrium thermodynamics, photosynthesis that harvests sun light using quantum tunneling and coherence, and avian magnet compass which may be utilizing quantum entangled states. These examples, which are not fully understood yet, show that the life perhaps knows graduate level physics or above.

Dr. Kaloyan Penev
Princeton University
Tuesday, February 28
10:00-11:00 a.m.
MSCX -Room 114

I will review the importance of tidal dissipation in low mass stars and giant planets. I will present the current challenges in understanding or describing the dissipative processes involved, and present promising new results pointing to a resolution if this decades old problem. I will conclude with discussing some of the projects I would like to pursue that will be enabled by better understanding of tidal dissipation.

Dr. David King
Monday, February 27
4:00-5:00 p.m.
MSCX -Room 114

About 84 million years ago, central Alabama was situated at the shoreline of the northern Gulf of Mexico. A warm, equitable climate prevailed and the age of dinosaurs was in full swing. A small asteroid perhaps 300 to 350 m in diameter penetrated the atmosphere and shallow ocean waters of central Alabama and detonated nearly a kilometer into the crust. The rim and floor of this impact crater have stood the test of time and are still present today as an area of highly disturbed geology in Elmore County, less than 20 minutes drive from downtown Montgomery. The crater is asymmetrical and is horseshoe-shaped, ranging in size from 4.5 to 7.6 km across. Suggestions that this unusual structure might be an impact crater began in the 1970s following a state survey mapping campaign in the area. However, proof of impact in the form of shocked minerals and traces of cosmic elements like iridium was lacking until a core-drilling campaign was undertaken in 1998, which was led by me. In 1999-2000 we documented unequivocal evidence of shocked mineral grains (quartz) and traces of cosmic elements from the impactor (iridium, plus Cr, Co, and Ni). This resulted in a 2002 paper in Earth and Planetary Science Letters that laid out the evidence and thus established Wetumpka as a bona fide impact crater within in the impact-crater community. Further research has established the role of sea water in the crater modification process. We have subsequently documented evidence of aqueous mass movements and muddy tsunami flows in the crater and vicinity.

Dr. Daniel Majaess
Tuesday, January 31st
4:15-5:00 p.m.
MSCX -Room 114

Dr. Dan Majaess graduated with a Ph.D. in astronomy from Saint Mary's University in Halifax, Canada. His primary area of research is to establish a reliable distance scale that is crucial for determining the expansion rate of the Universe, the age of the Universe, and facilitating efforts to delineate the spiral structure of our Milky Way galaxy. Dan is a candidate for the position of Assistant Professor of Astronomy at Troy University.

Dr. Govind Menon
Tuesday, October 25th
6:00-7:00 p.m.
Kiwanis Club

 Dr. James Sanders and Ty Naquin help demonstrate how an interferometer works at the Kiwanis Club during the talk on gravitational waves

Dr. Govind Menon
Thursday, November 17th
4:00-5:00 p.m.
MSCX - Room 114

 

This introductory talk covers the rough cosmological history of the last 13.4 billion years of the universe.

Dr. Luther Beegle
October 16th, 2014
3:00-4:00 p.m.
MSCX – Room 114

Abstract: The Scanning Habitable Environments with Raman & Luminescence for Organics & Chemicals (SHERLOC) investigation was recently selected for the Mars 2020 integrated payload. The Mars 2020 rover has two main objectives: In Situ Analysis of samples to determine the geological, chemical and potential for biology in a sample and 2) To collect and cache samples of high scientific interest to return to earth for analysis in a terrestrial laboratory. SHERLOC enables non-contact, spatially resolved, and highly sensitivity detection and characterization of organics and minerals in the Martian surface and near subsurface. SHERLOC is an arm-mounted, Deep UV (DUV) resonance Raman and fluorescence spectrometer utilizing a 248.6-nm DUV laser which induces fluorescence in aromatic organic molecules present in a sample . SHERLOC's deep UV resonance Raman enables detection and classification of aromatic and aliphatic organics with sensitivities of 10^-2 to below 10^-4 w/w at greater than 50 µm spatial scales. In addition to organics, the deep UV Raman enables detection and classification of minerals relevant to aqueous chemistry with grain sizes below 20 µm grains. The instrument goals are to assess past aqueous history, detect the presence and preservation of potential biosignatures, and to support selection of return samples. To do this, SHERLOC will measure CHNOPS-containing mineralogy, measure the distribution and type of organics preserved at the surface, and correlate them to textural features.

Brenda Marshall
Wednesday, April 8th
3:00-4:00 p.m., including Q&A
MSCX – Room 116

This talk illustrates capabilities in Mathematica 10 and other Wolfram technologies that are directly applicable for use in teaching and research on campus. Topics of these technical talks include: • Enter calculations in everyday English, or using the flexible Wolfram Language • Visualize data, functions, surfaces, and more in 2D or 3D • Store and share documents locally or in the Wolfram Cloud • Use the Predictive Interface to get suggestions for the next useful calculation or function options • Access trillions of bits of on-demand data • Use semantic import to enrich your data using Wolfram curated data • Easily turn static examples into mouse-driven, dynamic applications • Access 10,000 free course-ready applications • Utilize the Wolfram Language's wide scope of built-in functions, or create your own • Get deep support for specialized areas including machine learning, time series, image processing, parallelization, and control systems, with no add-ons required