Stephanie L Bailey

• Doctor of Philosophy
• Adjunct Professor of Physics at Santiago Canyon College

Despite trials of mammography and widespread use, optimal screening policy is controversial. To evaluate U.S. breast cancer screening strategies. 6 models using common data elements. National data on age-specific incidence, competing mortality, mammography characteristics, and treatment effects. A contemporary population cohort. Lifetime. Societal....

Compared with women aged 50-69 years, the lower sensitivity of mammographic screening in women aged 40-49 years is largely attributed to the lower mammographic tumor detectability and faster tumor growth in the younger women. We used a Monte Carlo simulation model of breast cancer screening by age to estimate the median tumor size detectable on a m...

Former Eastern bloc countries are major sources for sex trafficking. Estimates of the extent of trafficking out of these countries vary widely, and little knowledge exists on the effectiveness of anti-trafficking efforts. The objective of this work was to adapt microsimulation modeling to assess the impact of intervention efforts to combat sex traf...

Background Spreadsheet software is increasingly used to implement systems science models informing health policy decisions, both in academia and in practice where technical capacity may be limited. However, spreadsheet models are prone to unintentional errors that may not always be identified using standard error-checking techniques. Our objective...

We have measured parity-violating asymmetries in elastic electron-proton and quasielastic electron-deuteron scattering at Q2=0.22 and 0.63 GeV2. They are sensitive to strange quark contributions to currents in the nucleon and the nucleon axial-vector current. The results indicate strange quark contributions of approximately < 10% of the charge and...

Understanding the nucleon spin structure in the regime where the strong interaction becomes truly strong poses a challenge to both experiment and theory. At energy scales below the nucleon mass of about 1 GeV, the intense interaction among the quarks and gluons inside the nucleon makes them highly correlated. Their coherent behaviour causes the eme...

Understanding the structure of the nucleon (proton and neutron) is a critical problem in physics. Especially challenging is to understand the spin structure when the Strong Interaction becomes truly strong. At energy scales below the nucleon mass (~1 GeV), the intense interactions of the quarks and gluons inside the nucleon makes them highly correl...

The spin-structure functions g1 and g2, and the spin-dependent partial cross-section σTT have been extracted from the polarized cross-sections differences, Δσ∥(ν,Q2) and Δσ⊥(ν,Q2) measured for the He3→(e→,e′)X reaction, in the E97-110 experiment at Jefferson Lab. Polarized electrons with energies from 1.147 to 4.404 GeV were scattered at angles of...

The spin-structure functions g_1 and g_2, and the spin-dependent partial cross-section \sigma_{TT} have been extracted from the polarized cross-sections differences, \Delta \sigma_{||}(\nu,Q^2) and \Delta \sigma_{\perp}(\nu,Q^2) measured for the 3He(e,e')X reaction at Jefferson Lab. Polarized electrons with energies from 1.147 to 4.404 GeV were sca...

The parity-violating asymmetry arising from inelastic electron-nucleon scattering at backward angle (~95 degrees) near the Delta(1232) resonance has been measured using a hydrogen target. From this asymmetry, we extracted the axial transition form factor G^A_{N\Delta}, a function of the axial Adler form factors C^A_i. Though G^A_{N\Delta} has been...

We have measured the beam-normal single-spin asymmetry $A_n$ in the elastic scattering of 1-3 GeV transversely polarized electrons from $^1$H and for the first time from $^4$He, $^{12}$C, and $^{208}$Pb. For $^1$H, $^4$He and $^{12}$C, the measurements are in agreement with calculations that relate $A_n$ to the imaginary part of the two-photon exch...

The parity-violating (PV) asymmetry of inclusive π- production in electron scattering from a liquid deuterium target was measured at backward angles. The measurement was conducted as a part of the G0 experiment, at a beam energy of 360 MeV. The physics process dominating pion production for these kinematics is quasifree photoproduction off the neut...

The parity-violating (PV) asymmetry of inclusive Ï⁻ production in electron scattering from a liquid deuterium target was measured at backward angles. The measurement was conducted as a part of the G0 experiment, at a beam energy of 360 MeV. The physics process dominating pion production for these kinematics is quasi-free photoproduction off the n...

Purpose: Developing countries like India face a growing prevalence of obesity even as substantial populations of underweight individuals persist. Because both obese and underweight individuals face distinct and elevated health risks, we developed microsimulation and calibration procedures appropriate for considering future obesity and underweight-r...

The objective was to demonstrate decision-analytic modeling in support of Child Welfare policymakers considering implementing evidence-based interventions. Outcomes included permanency (e.g., adoptions) and stability (e.g., foster placement changes). Analyses of a randomized trial of KEEP-a foster parenting intervention-and NSCAW-1 estimated placem...

We have measured the beam-normal single-spin asymmetries in elastic scattering of transversely polarized electrons from the proton, and performed the first measurement in quasielastic scattering on the deuteron, at backward angles (lab scattering angle of 108°) for Q² = 0.22 GeV²/c² and 0.63 GeV²/c² at beam energies of 362 and 687 MeV, respectively...

In the G0 experiment, performed at Jefferson Lab, the parity-violating elastic scattering of electrons from protons and quasi-elastic scattering from deuterons is measured in order to determine the neutral weak currents of the nucleon. Asymmetries as small as 1 part per million in the scattering of a polarized electron beam are determined using a d...

We have measured parity violating asymmetries in elastic electron-proton and quasi-elastic electrondeuteron scattering at backward electron angle. These measurements have been done at two momentum transfers : Q2 = 0.22 and 0.63 (GeV/c)2 . Together with our previous forward angle measurement [1], we can extract strange quark contributions to the ele...

We have measured parity-violating asymmetries in elastic electron-proton and quasielastic electron-deuteron scattering at Q{sup 2}=0.22 and 0.63 GeV{sup 2}. They are sensitive to strange quark contributions to currents in the nucleon and the nucleon axial-vector current. The results indicate strange quark contributions of < or approx. 10% of the ch...

We have measured parity violating asymmetries in elastic electron-proton and quasi-elastic electrondeuteron scattering at backward electron angle. These measurements have been done at two momentum transfers : Q2 = 0.22 and 0.63 (GeV/c)2. Together with our previous forward angle measurement [1], we can extract strange quark contributions to the elec...

We have measured the beam-normal single-spin asymmetry in elastic scattering of transversely polarized 3 GeV electrons from unpolarized protons at Q2=0.15, 0.25 (GeV/c)2. The results are inconsistent with calculations solely using the elastic nucleon intermediate state and generally agree with calculations with significant inelastic hadronic interm...

We report new measurements of the parity-violating asymmetry APV in elastic scattering of 3 GeV electrons off hydrogen and He4 targets with &ap;6.0°. The He4 result is APV=(+6.40±0.23(stat)±0.12(syst))×10-6. The hydrogen result is APV=(-1.58±0.12(stat)±0.04(syst))×10-6. These results significantly improve constraints on the electric and magnetic st...

We report new measurements of the parity-violating asymmetry A{sub PV} in elastic scattering of 3 GeV electrons off hydrogen and ⁴He targets with â6.0 deg. . The ⁴He result is A{sub PV}=(+6.40{+-}0.23(stat){+-}0.12(syst))x10⁻⁶. The hydrogen result is A{sub PV}=(-1.58{+-}0.12(stat){+-}0.04(syst))x10⁻⁶. These results significantly improve...

The goal of Experiment E04-115 (the G0 backward angle measurement) at Jefferson Lab is to investigate the contributions of strange quarks to the fundamental properties of the nucleon. The experiment measures parity-violating asymmetries in elastic electron scattering off hydrogen and quasielastic electron scattering off deuterium at backward angles...

4.5 pages, 2 figures. Replacement, modifying a few sentences, captions, and labels for clarity - SONDE

We report new measurements of the parity-violating asymmetry A(PV) in elastic scattering of 3 GeV electrons off hydrogen and 4He targets with <theta(lab)> approximately 6.0 degrees . The 4He result is A(PV)=(+6.40+/-0.23(stat)+/-0.12(syst))x10(-6). The hydrogen result is A(PV)=(-1.58+/-0.12(stat)+/-0.04(syst))x10(-6). These results significantly im...

We have measured parity-violating asymmetries in elastic electron-proton scattering over the range of momentum transfers 0.12 < or =Q2 < or =1.0 GeV2. These asymmetries, arising from interference of the electromagnetic and neutral weak interactions, are sensitive to strange-quark contributions to the currents of the proton. The measurements were ma...

Model-independent methods to measure linear optics functions have been tested in turn-by-turn data from the ESRF storage ring. The methods do not necessitate neither the knowledge of the model nor magnetic element manipulation. They use only the positions measured in consecutive BPM of betatron oscillations issued by small transverse kicks. The pha...

Whole bone strength can be partitioned into structural and material components. In three-point bending tests of 6-month-old female humeri from the HcB/Dem recombinant congenic series, strains HcB/8 and HcB/23 differed markedly in calculated failure stress but not ash percentage. Fourier transform infrared spectroscopic imaging was used to determine...

Whole bone strength can be partitioned into structural and material components. In three-point bending tests of 6-month-old female humeri from the HcB/Dem recombinant congenic series, strains HcB/8 and HcB/23 differed markedly in calculated failure stress but not ash percentage. Fourier transform infrared spec-troscopic imaging was used to determin...