Refracting Immigration Rhetoric: The Struggle to Define Identity, Place and Nation in Southern Arizona

This thesis examines the refraction of immigration rhetoric in a local context through a collection of letters to the editor of southern Arizona’s largest and only daily newspaper, the Arizona Daily Star, for the period 2006-2010. The purpose is to further insight into the process by which xenophobic nationalism is both contested and legitimated ‘on the ground,’ within a violent paradigm of nativist rhetoric and exclusion. Findings reveal essential disjunctures between and within letter-writers’ conceptions of moral proximity and the social contract—as delimiting those obligations and expectations that inhere between society, the self and the stranger—as well as competing notions of legitimacy based, on the one hand, on an overarching and at times homogenizing myth of nation and, on the other, in rootedness to the cultural and historic particularities of place. These disjunctures point to a profusion of contradictory ideations, the struggle over which exposes the efforts of community members to contest and redefine the boundaries of societal norms within the context of emergent nationalism

Discreteness-induced resonances and AC voltage amplitudes in long one-dimensional Josephson junction arrays

New resonance steps are found in the experimental current-voltage characteristics of long, discrete, one-dimensional Josephson junction arrays with open boundaries and in an external magnetic field. The junctions are underdamped, connected in parallel, and DC biased. Numerical simulations based on the discrete sine-Gordon model are carried out, and show that the solutions on the steps are periodic trains of fluxons, phase-locked by a finite amplitude radiation. Power spectra of the voltages consist of a small number of harmonic peaks, which may be exploited for possible oscillator applications. The steps form a family that can be numbered by the harmonic content of the radiation, the first member corresponding to the Eck step. Discreteness of the arrays is shown to be essential for appearance of the higher order steps. We use a multi-mode extension of the harmonic balance analysis, and estimate the resonance frequencies, the AC voltage amplitudes, and the theoretical limit on the output power on the first two steps.Comment: REVTeX, 17 pages, 7 figures, psfig; to appear in J. Applied Physic

Underdamped vortex flow devices

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.Includes bibliographical references (leaves 77-80).by Amy E. Duwel.M.S

Harmonic resonances in nonlinear Josephson junction circuits : experimental and analytical studies

Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.Includes bibliographical references (p. 191-196).by Amy Elizabeth Duwel.Ph.D

An investigation on thermoelastic damping of high-Q ring resonators

For applications requiring high performance angular rate measurements it is important to be able to design MEMS rate sensors with high quality factors (Q). This paper considers ring resonator based rate sensors and investigates the influence of design changes to the ring and support legs on thermoelastic damping, which is the dominant dissipation mechanism. A computational method is used to quantify the thermoelastic damping and a detailed parameter study is conducted to understand the influence of ring geometry, support legs and micro-machined slots around the ring circumference. The results show that damping in the support legs can have significant influence on the total energy dissipated from the resonator, and the optimum leg geometry can be identified to achieve high Q. It is also observed that the addition of slots improves Q for resonators having higher energy loss. However, for high-Q, rings slots have a detrimental effect. The results presented are useful for designing ring resonators with reduced levels of damping

ANALISA PENGENDALIAN PERSEDIAAN BAHAN BAKU PADA PT. INCASI RAYA PESISIR SELATAN

Penelitian ini bertujuan untuk mengetahui sistem pengendalian persedian bahan baku pada PT. Incasi Raya Pesisir Selatan. Metode analisis data yang digunakan adalah analisis kuantitatif dengan menggunakan metode Economic Order Quantity, stok pengaman dan titik pemesanan kembali. Berdasarkan hasil analisis kuantitas pembelian yang optimum menurut kebijakan perusahaan adalah 312 kali, sedangkan dengan menggunakan metode Ergonomic oerder kuantity yaitu 208 kali. Total biaya persediaan dengan menggunakan kebijakan perusahaan adalah Rp 8.746.878,- setelah menggunakan metode  Ergonomic Order Kuantitydapat mengefesiensikan besarnya biaya persedian perusahaan yaitu Rp 8.078.649,-. Sementara itu untuk persedian pengaman dan titik pemesanan kembali menurut kebijakan perusahaan tidak ada, sedangkan menurut perhitungan Ergonomic Order Kuantitybesarnya persediaan pengaman adalah sebanyak 2.335 ton dan titik pemesanan ulang sebesar 3.763 ton

Modeling Dispersive Coupling and Losses of Localized Optical and Mechanical Modes in Optomechanical Crystals

Periodically structured materials can sustain both optical and mechanical excitations which are tailored by the geometry. Here we analyze the properties of dispersively coupled planar photonic and phononic crystals: optomechanical crystals. In particular, the properties of co-resonant optical and mechanical cavities in quasi-1D (patterned nanobeam) and quasi-2D (patterned membrane) geometries are studied. It is shown that the mechanical Q and optomechanical coupling in these structures can vary by many orders of magnitude with modest changes in geometry. An intuitive picture is developed based upon a perturbation theory for shifting material boundaries that allows the optomechanical properties to be designed and optimized. Several designs are presented with mechanical frequency ~ 1-10 GHz, optical Q-factor Qo > 10^7, motional masses meff 100 femtograms, optomechanical coupling length LOM < 5 microns, and a radiation-limited mechanical Q-factor Qm > 10^7.Comment: 25 pages, 9 figure

Row-switched states in two-dimensional underdamped Josephson junction arrays

When magnetic flux moves across layered or granular superconductor structures, the passage of vortices can take place along channels which develop finite voltage, while the rest of the material remains in the zero-voltage state. We present analytical studies of an example of such mixed dynamics: the row-switched (RS) states in underdamped two-dimensional Josephson arrays, driven by a uniform DC current under external magnetic field but neglecting self-fields. The governing equations are cast into a compact differential-algebraic system which describes the dynamics of an assembly of Josephson oscillators coupled through the mesh current. We carry out a formal perturbation expansion, and obtain the DC and AC spatial distributions of the junction phases and induced circulating currents. We also estimate the interval of the driving current in which a given RS state is stable. All these analytical predictions compare well with our numerics. We then combine these results to deduce the parameter region (in the damping coefficient versus magnetic field plane) where RS states can exist.Comment: latex, 48 pages, 15 figs using psfi