University of Central Florida

About: University of Central Florida is a education organization based out in Orlando, Florida, United States. It is known for research contribution in the topics: Laser & Population. The organization has 18822 authors who have published 48679 publications receiving 1234422 citations. The organization is also known as: UCF.

Investigating the Relationship Between Intimate Partner Violence and HIV Risk-Propensity in Black/African-American Women

Abstract: This study explored the relationship between Intimate Partner Violence and HIV Risk-Propensity in African-American women. An anonymous questionnaire was completed by a community based sample of 200 African American women with a varied history of intimate partner violence, to determine whether being in a violent relationship impacts HIV risk. Various statistical techniques, including structural equation modeling (SEM), bivariate correlation analyses and ANOVA were used to examine the data. A strong positive correlation was found to exist between sexual coercion and Intimate Partner Violence. In the effort to fortify prevention strategies, and reduce the rates of HIV infection in African-American women, additional factors that impact disease transmission were discussed. Implications for social work/mental health practice and suggestions for future research were made.

Scaling behavior of the Ising model coupled to two-dimensional quantum gravity.

Abstract: We study the Ising model on dynamical {phi}{sup 3} graphs with spherical topology. A finite-size scaling analysis is carried out both with and without an external field leading to numerical estimates for various critical exponents which are in good agreement with analytical calculations. We further determine the equation of state, and measure the correlation of Ising spins on the ensemble of graphs.

Can dehydrated human amnion/chorion membrane accelerate the return to potency after a nerve-sparing robotic-assisted radical prostatectomy? Propensity score-matched analysis

Abstract: The objective of this study is to determine if the use of dehydrated human amnion/chorion membrane (dHACM) allograft wrapped around the NVB during a robotic-assisted radical prostatectomy (RARP) accelerates the return to potency. 940 patients with preoperative SHIM >20 underwent RARP with some degree of bilateral NS. Of these, 235 patients underwent RARP, with bilateral placement of dHACM graft around the NVBs. They were matched in a 1:3 proportion with a similar group of patients (n = 705) who did not receive the allograft (control group or group 2). Minimum follow-up was 12 months. Postoperative outcomes were analyzed between propensity-matched dHACM graft (group 1) and non-graft groups (group 2). Kaplan–Meier survival curves were compared across techniques using the log-rank test. There were no significant demographic differences between the two groups. Potency was defined as the ability to achieve and maintain satisfactory erections firm enough for sexual intercourse, with or without the use of PDE-5 inhibitors. The mean time to potency was significantly lower in group 1 (2.37 months) versus group 2 (3.94 months) (p < 0.0001). The potency recovery rates were superior for group 1 at all early time points measured except at 12 months. The time to potency was significantly shorter in the dHACM group with full NS, 2.19 ± 1.84 versus 2.78 ± 2.70 mo. in the non-dHACM with full NS (p = 0.029). In the dHACM group with partial NS, the mean time to potency was 3.05 ± 2.32 versus 3.92 ± 3.42 mo. in the non-dHACM with partial NS (p = 0.021). Patients who received the dHACM wrap around the NVB after RARP accelerates the return to potency when compared to a similar control group without the use of the allograft. We also demonstrated that this faster return to potency occurs regardless of the degree of the NS preservation. Younger patients (<55 years of age) had the highest overall advantage if they received the graft. Our results indicate that dHACM placement at the site of the prostatic NVB does not increase the risk of BCR after RARP, neither in the presence of PSM, extra-prostatic disease (≥pT3) nor high Gleason score (Gleason ≥8).

Imaging atmospheric aerosol particles from a UAV with digital holography.

Abstract: The lack of quantitative characterization of aerosol particles and their loading in the atmosphere is one of the greatest uncertainties in climate-change science. Improved instrumentation capable of determining the size and shape of aerosol particles is needed in efforts to reduce this uncertainty. We describe a new instrument carried by an unmanned aerial vehicle (UAV) that images free-floating aerosol particles in the atmosphere. Using digital holography, the instrument obtains the images in a non-contact manner, resolving particles larger than ten micrometers in size in a sensing volume of approximately three cubic centimeters. The instrument, called the holographic aerosol particle imager (HAPI), has the unique ability to image multiple particles freely entering its sensing volume from any direction via a single measurement. The construction of HAPI consists of 3D printed polymer structures that enable a sufficiently low size and weight that it may be flown on a commercial-grade UAV. Examples from field trials of HAPI show images of freshly emitted tree pollen and mineral dust.

Biexcitons in monolayer transition metal dichalcogenides tuned by magnetic fields.

Abstract: We present time-integrated four-wave mixing measurements on monolayer MoSe2 in magnetic fields up to 25 T The experimental data together with time-dependent density function theory calculations provide interesting insights into the biexciton formation and dynamics In the presence of magnetic fields the coherence at negative and positive time delays is dominated by intervalley biexcitons We demonstrate that magnetic fields can serve as a control to enhance the biexciton formation and help search for more exotic states of matter, including the creation of multiple exciton complexes and excitonic condensates