Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 328 for “"Angular momentum"”.
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High Angular Momentum Rydberg Wave Packets
High angular momentum Rydberg wave packets are studied. Application of carefully tailored electric fields to low angular momentum, high- n ( n ∼ 300) Rydberg atoms creates coherent superpositions of Stark states with near extreme values of angular momentum, [cursive l]. Wave packet components orbit …
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Angular Momentum Evolution of Young Stars
… order to achieve a better understanding of their angular momentum evolution during this evolutionary stage. For that purpose I have carried out an extensive photometric monitoring program which enabled me to identify a total of 405 periodic and 184 irregular variable PMS stars in the young open …
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The regulation of angular momentum during human walking
The conservation of angular momentum provides an elegant model for human walking and might be used to generate stable robotic locomotion if employed by a control algorithm. To examine the extent to which the body regulates angular momentum, a force model was developed to predict horizontal ground …
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Turbulent Angular Momentum Transport in Weakly-Ionized Accretion Disks
… (accumulating) onto a central object. Since the angular momentum of the infalling material is conserved, a disk naturally forms as a repository of angular momentum. Dissipation removes energy and angular momentum from the system and allows the disk to accrete. It is the energy lost in this …
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Physical-Security for Wireless with Orbital Angular Momentum Wave
As technology progresses and an ever-increasing number of digital data are transmitted day to day, securing data has emerged as a major field of research. Conventional cryptography in higher layers of protocol stack has been studied as a data protection technique from an unauthorized party by …
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Space-time structure of changes in atmospheric angular momentum
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology and Physical Oceanography, 1982.
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Angular momentum flux in the formation of the solar system
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1964.
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Born-Oppenheimer Expansion for Diatomic Molecules with Large Angular Momentum
… bounded vibrational quantum number n and large angular momentum quantum number l. Specifically, results are given when (l + 1) < κ𝛜⁻³/². Explicit formulas for the approximate energies are also given. Numerical comparisons for the H+₂ and HD+ molecules are presented.
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Orbital Angular Momentum Microlasers: From The First Demonstration To Ultrafast Tunability
Orbital angular momentum (OAM) carried by structured vortex light establishes a new information dimension, thereby promising high capacity optical communication and high performance computation in both classical and quantum regimes. Meanwhile, laser is the key driver in the field of optics and …
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Orbital angular momentum and fully structured light in nonlinear media and cavities
… structure. Where the beam carries a net orbital angular momentum we observe a rotation in the structure. We detail how the angular velocity of the Turing structure can be controlled by careful selection of the parameters of the FSL beams.
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Extraordinary light-induced local field, angular momentum and force near metallic nanoparticles
… sensing. We introduce the concept of the local angular momentum (LAM) vector as a useful figure of merit for the design of nanostructures that provide large field gradients. Finally, we introduce a new technique that can demonstrate the mapping of electromagnetic forces between a nanoscale tip …
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Wind-evaporation feedback, angular momentum conservation, and the abrupt onset of monsoons
… feedback and its interaction with angular momentum conserving flow. The first half of the thesis examines the effect of wind induced surface heat exchange (WISHE) on nonlinear, axisymmetric Hadley circulations in a convective quasi-equilibrium framework. For thermal forcings …
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Angular momentum in turns and abrupt starts : strategies for bipedal balance control
… This thesis takes biomechanical principals of angular momentum and applies them to healthy subjects in an effort to elucidate human balance control strategies. Each transient task is unique, and despite large segmental contributions to whole-body angular momentum during movement, the whole-body …
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Segmental Movement Compensations in Patients with Transtibial Amputation Identified Using Angular Momentum Separation
… This dissertation presents the use of segmental angular momentum to describe movement compensations in patients with TTA, and assess their effects on the musculoskeletal system; which provides a potential platform applicable in both instrumented and observational settings.</p> <p>Ten patients …
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Orbital angular momentum encoding/decoding of 2D images for scalable multiview colour displays
… theoretically unlimited state space, orbital angular momentum (OAM) modes may be an alternative to the conventional multiview approaches and potentially project more images. This research involves exploring the possibility of encoding/decoding off-axis points in 2D images with OAM modes, …
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Quantum transport properties of charge, spin and orbital angular momentum in two-dimensional materials
… propriedades de transporte de spin e de momento angular orbital em sistemas bidimensionais multi-orbitais. Examinamos duas classes distintas de materiais: sistemas de banda p, representados pelo recém sintetizado bismutheno/SiC (juntamente com seus análogos do grupo-VA) e os dicalcogenatos de …
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