Physics Commons^™

Directions For The Development Of Personal Subsidiary Farms And Increasing Sources Of Income In The Future, Yakupov Kabil

Karakalpak Scientific Journal

This article discusses the features of the development of personal subsidiary farms in modern conditions, defines their functions in the agrarian economy and in the life of society as a whole. Modern agrarian policy provides for the development of various forms of management, including personal subsidiary farms. Personal subsidiary farms are an organic part of the agricultural sectors and make a significant contribution to solving the food problem of the country. The provision of the population with food products is carried out by personal subsidiary farms through their own consumption, as well as the sale of surplus products.

Atomistic Engineering Of Phonons In Functional Oxide Heterostructures, Seung Gyo Jeong, Ambrose Seo, Woo Seok Choi

Physics and Astronomy Faculty Publications

Engineering of phonons, that is, collective lattice vibrations in crystals, is essential for manipulating physical properties of materials such as thermal transport, electron-phonon interaction, confinement of lattice vibration, and optical polarization. Most approaches to phonon-engineering have been largely limited to the high-quality heterostructures of III–V compound semiconductors. Yet, artificial engineering of phonons in a variety of materials with functional properties, such as complex oxides, will yield unprecedented applications of coherent tunable phonons in future quantum acoustic devices. In this study, artificial engineering of phonons in the atomic-scale SrRuO₃/SrTiO₃ superlattices is demonstrated, wherein tunable phonon modes are ...

Digital Computer Calculation Of Potential And Potential Gradient Around Bundled Three Phase Lines, Adel Lamei Stefanos

Archived Theses and Dissertations

No abstract provided.

Stripe Order, Impurities, And Symmetry Breaking In A Diluted Frustrated Magnet, Xuecheng Ye, Rajesh Narayanan, Thomas Vojta

Physics Faculty Research & Creative Works

We investigate the behavior of the frustrated J₁-J₂ Ising model on a square lattice under the influence of random dilution and spatial anisotropies. Spinless impurities generate a random-field type disorder for the spin-density wave (stripe) order parameter. These random fields destroy the long-range stripe order in the case of spatially isotropic interactions. Combining symmetry arguments, percolation theory, and large-scale Monte Carlo simulations, we demonstrate that arbitrarily weak spatial interaction anisotropies restore the stripe phase. More specifically, the transition temperature T_c into the stripe phase depends on the interaction anisotropy ΔJ via T_c∼1/|ln(ΔJ ...

Wallaby Pilot Survey: H I Gas Disc Truncation And Star Formation Of Galaxies Falling Into The Hydra I Cluster, T. N. Reynolds, B. Catinella, L. Cortese, Tobias Westmeier, G. R. Meurer, L. Shao, D. Obreschkow, J. Román, L. Verdes-Montenegro, Juan P. Madrid

Physics and Astronomy Faculty Publications and Presentations

We present results from our analysis of the Hydra I cluster observed in neutral atomic hydrogen (HI) as part of the Widefield ASKAP L-band Legacy All-sky Blind Survey (WALLABY). These WALLABY observations cover a 60-square-degree field of view with uniform sensitivity and a spatial resolution of 30 arcsec. We use these wide-field observations to investigate the effect of galaxy environment on HI gas removal and star formation quenching by comparing the properties of cluster, infall and field galaxies extending up to ∼5R200 from the cluster centre. We find a sharp decrease in the HI-detected fraction of infalling galaxies at a ...

Neutron Spectroscopy Of The Parity-Violating 0.734 Ev Neutron Resonance In Lanthanum-139 In Preparation For The Noptrex Time Reversal Violation Experiment, Danielle Schaper

Theses and Dissertations--Physics and Astronomy

One of the most outstanding questions in physics is the matter-antimatter asymmetry of the Universe, resulting from excess baryogenesis processes during the early moments of the formation of the Universe. At present, the types of processes needed to explain this matter excess, so-called `CP-violating processes' are known to exist within the present framework of the Standard Model of particle physics. However, decades of research has shown that our understanding of the origin of these processes is incomplete, as we do not presently know of enough sources of CP-violating processes to account for the large baryon asymmetry that we observe. The ...

On The Coriolis Effect For Internal Ocean Waves, Rossen Ivanov

Conference papers

A derivation of the Ostrovsky equation for internal waves with methods of the Hamiltonian water wave dynamics is presented. The internal wave formed at a pycnocline or thermocline in the ocean is influenced by the Coriolis force of the Earth's rotation. The Ostrovsky equation arises in the long waves and small amplitude approximation and for certain geophysical scales of the physical variables.

Studying The Conditions For Magnetic Reconnection In Solar Flares With And Without Precursor Flares, Seth H. Garland, Daniel J. Emmons, Robert D. Loper

Faculty Publications

Forecasting of solar flares remains a challenge due to the limited understanding of the triggering mechanisms associated with magnetic reconnection, the primary physical phenomenon connected to these events. Studies have indicated that changes to the photospheric magnetic fields associated with magnetic reconnection – particularly in relation to the field helicity – occur during solar flare events. This study utilized data from the Solar Dynamics Observatory (SDO) Helioseismic and Magnetic Imager (HMI) and SpaceWeather HMI Active Region Patches (SHARPs) to analyze full vector-field component data of the photospheric magnetic field during solar flare events within a near decade long HMI dataset. Analysis of ...

Experiment 1.01: Measurement, Diego Castano

Physics Lab Experiments with Simulated Data for Remote Delivery

Introduction to measurement/data analysis; measurements of an aluminum cylinder and cuboid are used to determine their densities.

Experiment 1.10: Standing Waves On Strings, Diego Castano

Physics Lab Experiments with Simulated Data for Remote Delivery

The fourth harmonic of a vibrating string is used to determine the acceleration due to gravity.

Experiment 1.09: The Simple Pendulum, Diego Castano

Physics Lab Experiments with Simulated Data for Remote Delivery

A simple pendulum is used to determine the acceleration due to gravity.

Experiment 1.08: Buoyancy, Diego Castano

Physics Lab Experiments with Simulated Data for Remote Delivery

Archimedes Principle is used to determine the density of an unknown metal.

Experiment 1.07: Torque, Diego Castano

Physics Lab Experiments with Simulated Data for Remote Delivery

A mechanical balance is used to study the role of torque in states of static equilibrium.

Experiment 1.06: Momentum, Diego Castano

Physics Lab Experiments with Simulated Data for Remote Delivery

The conservation of momentum for the case of colliding gliders on an air-track is examined.

Experiment 1.05: Energy, Diego Castano

Physics Lab Experiments with Simulated Data for Remote Delivery

The conservation of energy for the case of a descending glider on an inclined air-track is examined.

Experiment 1.04: Newton's 2nd Law, Diego Castano

Physics Lab Experiments with Simulated Data for Remote Delivery

The motion of a modified Atwood-type machine is studied.

Experiment 1.03: Acceleration Due To Gravity: Inclined Surface, Diego Castano

Physics Lab Experiments with Simulated Data for Remote Delivery

The acceleration due to gravity is determined from the descent of a near frictionless glider on an inclined air-track.

Experiment 1.02: Acceleration Due To Gravity: Vertical Drop, Diego Castano

Physics Lab Experiments with Simulated Data for Remote Delivery

The acceleration due to gravity is determined from the fall of a metal sphere.

There From The Beginning: The Women Of Los Alamos National Laboratory Supporting National And International Nuclear Security, Olga Martin, Laura Mcclellan, Octavio Ramos, Heather Quinn

International Journal of Nuclear Security

From the beginning of the Manhattan Project in the early 1940s, the women of what would become Los Alamos National Laboratory (LANL) worked in technical positions alongside their male counterparts, played a key role as computers, and worked in administrative jobs as secretaries, phone operators, bookkeepers, and on behalf of the U.S. Army in the Women’s Army Corps.

Throughout the history of the Laboratory, women experts at LANL helped establish and lead important national and international security programs, with careers in science, technology, engineering, and mathematics. Over time, the women of Los Alamos have come together under various ...

Physical And Magnetic Properties Of Nanosized Mn0.5ni0.5¬Fe2-Xprxo4 Prepared By Co-Precipitation Method, Douaa El-Said Bakeer, Khulud Habanjar, Ghassan Youness, Mohammad Abou Ghoush

BAU Journal - Science and Technology

Nanosized Mn_0.5Ni_0.5Fe_2-xPr_xO₄, x=0.0, 0.02, 0.04, 0.06, 0.08, 0.1 and 0.15 are prepared by co-precipitation method at calcination temperature 650^oC for 4 hours. X-ray diffraction patterns show the presence of the cubic (Mn-Ni)- ferrite phase and anti-ferromagnetic a-Fe₂O₃. The variation in the lattice parameter “a” is due to the replacement of smaller radius ions Fe⁺³ by larger radius ions Pr⁺³. Transmission electron micrographs indicate that the particles are spherical in shape. The moderately agglomerated particles ...