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Articles 31 - 41 of 41
Full-Text Articles in Physical Sciences and Mathematics
Primer On Nuclear Exchange Models, David W. Hafemeister
Primer On Nuclear Exchange Models, David W. Hafemeister
Physics
Basic physics is applied to nuclear force exchange models between two nations. Ultimately, this scenario approach can be used to try and answer the age old question of "how much is enough?" This work is based on Chapter 2 of Physics of Societal Issues: Calculations on National Security, Environment and Energy (Springer, 2007 and 2014).
Appendix A: Nuclear Arms Chronology, David Hafemeister
Nuclear Proliferation And Testing: A Tale Of Two Treaties, Pierce S. Corden, David Hafemeister
Nuclear Proliferation And Testing: A Tale Of Two Treaties, Pierce S. Corden, David Hafemeister
Physics
Despite progress in reducing stockpiles after the end of the Cold War, the disturbing actions of some nations could spread nuclear weapon capabilities and enlarge existing arsenals.
A Boxer's Punch, Jacob A. Ekegren
A Boxer's Punch, Jacob A. Ekegren
Physics
For over a year now, I have been interested in the sport of boxing. This fascination led me to explore what occurs to a human head upon impact from a boxer’s punch. It is known that a knockout occurs when blood circulation to the brain is compressed. This compression results from the sudden acceleration and deceleration of the head. Therefore, the primary focus of this experiment explores the relative effort necessary to cause significant movement to a head about a neck.
Developing A Diffraction Pattern Projection System For Neutral Atom Quantum Computation, Sanjay Khatri
Developing A Diffraction Pattern Projection System For Neutral Atom Quantum Computation, Sanjay Khatri
Physics
No abstract provided.
Monitoring Atom Traps For Neutral Atom Quantum Computing, Taylor Shannon
Monitoring Atom Traps For Neutral Atom Quantum Computing, Taylor Shannon
Physics
To increase computing power for numerous practical advantages, scientists are actively researching the field of quantum computing. Neutral atom quantum computing is a promising avenue towards building a quantum computer that satisfies four of the five DiVincenzo criteria. This involves a magneto-optical trap to cool the atoms and move them to a cloud in the center of a vacuum chamber. Then laser light will be shone through an array of pinholes to trap the atoms in an array of dipole traps. In order to ensure the atoms are trapped, I have set up an imaging system that consists of a …
Investigation Of The Supercritical Bifurcation In A Simple Magneto-Mechanical System, Bo Baker
Investigation Of The Supercritical Bifurcation In A Simple Magneto-Mechanical System, Bo Baker
Physics
At the point of supercritical bifurcation, a system with one stable state diverges into two separate stable states, with the original state no longer stable. The experiment reported here illustrates the supercritical bifurcation using a spring steel strip with a vertically applied load as the mechanism to be subjected to supercritical bifurcation. Increasing the load causes the strip to buckle to one side or another. We introduce a novel method for laterally perturbing the strip and creating an imperfection in the bifurcation. Our results show that beyond the point of bifurcation the system exhibits hysteresis and lays the groundwork for …
Mechanical And Microscopic Properties Of The Reversible Plastic Regime In A 2d Jammed Material, Nathan C. Keim, Paulo E. Arratia
Mechanical And Microscopic Properties Of The Reversible Plastic Regime In A 2d Jammed Material, Nathan C. Keim, Paulo E. Arratia
Physics
At the microscopic level, plastic flow of a jammed, disordered material consists of a series of particle rearrangements that cannot be reversed by subsequent deformation. An infinitesimal deformation of the same material has no rearrangements. Yet between these limits, there may be a self-organized plastic regime with rearrangements, but with no net change upon reversing a deformation. We measure the oscillatory response of a jammed interfacial material, and directly observe rearrangements that couple to bulk stress and dissipate energy, but do not always give rise to global irreversibility.
First-Epoch Vlba Imaging Of 20 New Tev Blazars, B. Glenn Piner, Philip G. Edwards
First-Epoch Vlba Imaging Of 20 New Tev Blazars, B. Glenn Piner, Philip G. Edwards
Physics
We present Very Long Baseline Array (VLBA) images of 20 TeV blazars not previously well studied on the parsec scale. All 20 of these sources are high-frequency peaked BL Lac objects (HBLs). Observations were made between August and December of 2013 at a frequency of 8.4 GHz. These observations represent the first epoch of a VLBA monitoring campaign on these blazars, and they significantly increase the fraction of TeV HBLs studied with high-resolution imaging. The peak very long baseline interferometry (VLBI) flux densities of these sources range from ~10 to ~100 mJy bm–1, and parsec-scale jet structure is detected in …
Magnetically Actuated Liquid Crystals, Serkan Zorba, Mingsheng Wang, Le He, Yadong Yin
Magnetically Actuated Liquid Crystals, Serkan Zorba, Mingsheng Wang, Le He, Yadong Yin
Physics
Ferrimagnetic inorganic nanorods have been used as building blocks to construct liquid crystals with optical properties that can be instantly and reversibly controlled by manipulating the nanorod orientation using considerably weak external magnetic fields (1 mT). Under an alternating magnetic field, they exhibit an optical switching frequency above 100 Hz, which is comparable to the performance of commercial liquid crystals based on electrical switching. By combining magnetic alignment and lithography processes, it is also possible to create patterns of different polarizations in a thin composite film and control over the transmittance of light in particular areas. Developing such magnetically responsive …
An Introduction To The Inverse Quantum Bound-State Problem In One Dimension, Thomas D. Gutierrez
An Introduction To The Inverse Quantum Bound-State Problem In One Dimension, Thomas D. Gutierrez
Physics
A technique to reconstruct one-dimensional, reflectionless potentials and the associated quantum wave functions starting from a finite number of known energy spectra is discussed. The method is demonstrated using spectra that scale like the lowest energy states of standard problems encountered in the undergraduate curriculum, such as the infinite square well and the simple harmonic oscillator.