121 research outputs found

    CAMP: Children’s Acceptance of Muffins with Different Proteins

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    In 2019, around 40% of school-aged children in Arkansas were classified as overweight (~17%) and obese (~23%), according to BMI data collected. Children with obesity have an increased risk of developing type 2 diabetes, hypertension, and dyslipidemia. Unhealthy eating habits, such as skipping breakfast, have been strongly associated with overeating, weight gain and obesity. Breakfast is a key component of a healthy diet and can positively impact children’s health and well-being. However, there has been a steady decline in breakfast consumption in US children over the past 40 years. Specifically, breakfast consumption declined among 8–10-yearold children by 9% and adolescents by 13-20%. In addition, in Arkansas, \u3e300,000 (10% of the state’s population) children receive free or reduced lunch and only 63.5% of these children participate in the School Breakfast Program. It has been established that protein is exceptionally important in regard to children’s nutritional needs, growth, and development. It has also been proven that consuming protein in the morning with breakfast is exceedingly beneficial for children and may help reduce hunger and food intake. However, convenient, high-protein breakfast foods are lacking. In addition, children’s acceptance of different protein sources such as pea protein or whey protein has not been studied. The original objectives of this project were to 1) develop a protein-based breakfast muffin for children using different protein sources, 2) to determine the effects of different protein sources on the sensory properties of muffins, and 3) to determine children’s acceptance of different protein sources. However, due to the COVID-19 pandemic, we were only able to address objectives 1 and 2

    Stable Optical Phase Modulation with Micromirrors

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    We measure the motional fluctuations of a micromechanical mirror using a Michelson interferometer, and demonstrate its interferometric stability. The position stability of the micromirror is dominated by the thermal mechanical noise of the structure. With this level of stability, we utilize the micromirror to realize an ideal optical phase modulator by simply reflecting light off the mirror and modulating its position. The resonant frequency of the modulator can be tuned by applying a voltage between the mirror and an underlying electrode. Full modulation depth of +/-\pi is achieved when the mirror resonantly excited with a sinusoidal voltage at an amplitude of 11V.Comment: 4 pages, 3 figure

    Multiplexed broadband beam steering system utilizing high speed MEMS mirrors

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    We present a beam steering system based on micro-electromechanical systems technology that features high speed steering of multiple laser beams over a broad wavelength range. By utilizing high speed micromirrors with a broadband metallic coating, our system has the flexibility to simultaneously incorporate a wide range of wavelengths and multiple beams. We demonstrate reconfiguration of two independent beams at different wavelengths (780 and 635 nm) across a common 5x5 array with 4 us settling time. Full simulation of the optical system provides insights on the scalability of the system. Such a system can provide a versatile tool for applications where fast laser multiplexing is necessary.Comment: 11 pages, 6 figures, submitte

    Independent individual addressing of multiple neutral atom qubits with a MEMS beam steering system

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    We demonstrate a scalable approach to addressing multiple atomic qubits for use in quantum information processing. Individually trapped 87Rb atoms in a linear array are selectively manipulated with a single laser guided by a MEMS beam steering system. Single qubit oscillations are shown on multiple sites at frequencies of ~3.5 MHz with negligible crosstalk to neighboring sites. Switching times between the central atom and its closest neighbor were measured to be 6-7 us while moving between the central atom and an atom two trap sites away took 10-14 us.Comment: 9 pages, 3 figure

    Multi-scale Optics for Enhanced Light Collection from a Point Source

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    High efficiency collection of photons emitted by a point source over a wide field-of-view (FoV) is crucial for many applications. Multi-scale optics over improved light collection by utilizing small optical components placed close to the optical source, while maintaining a wide FoV provided by conventional imaging optics. In this work, we demonstrate collection efficiency of 26% of photons emitted by a point-like source using a micromirror fabricated in silicon with no significant decrease in collection efficiency over a 10 mm object space.Comment: 4 pages, 4 figure

    MEMS-Based Optical Beam Steering System for Quantum Information Processing in 2D Atomic Systems

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    In order to provide scalability to quantum information processors utilizing trapped atoms or ions as quantum bits (qubits), the capability to address multiple individual qubits in a large array is needed. Micro-electromechanical systems (MEMS) technology can be used to create a flexible and scalable optical system to direct the necessary laser beams to multiple qubit locations. We developed beam steering optics using controllable MEMS mirrors that enable one laser beam to address multiple qubit locations in a 2 dimensional trap lattice. MEMS mirror settling times of 10 us were demonstrated which allow for fast access time between qubits.Comment: 7 pages, 4 figure

    ФОРМИРОВАНИЕ ПОРИСТОГО АНОДНОГО ОКСИДА АЛЮМИНИЯ В РАСТВОРЕ МАЛОНОВОЙ КИСЛОТЫ С ДОБАВКОЙ АРСЕНАЗО I: 1. КИНЕТИКА АНОДИРОВАНИЯ, ОБЪЕМНЫЙ РОСТ, РАСТВОРЕНИЕ И МЕЗОПОРИСТАЯ СТРУКТУРА ОКСИДА

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    A formation of anodic alumina in malonic acid containing complexing additives arsezano I and without it,the kinetics of the formation of alumina, mesoporous structure, Pilling-Bedworth ratio and solution study.Проведено гальваностатическое формирование анодного оксида алюминия в малоновой кислоте с комплексообразующей добавкой арсеназо I и без нее. Изучены кинетика формирования оксида, растворение алюминия в процессе анодирования, объемный рост анодного оксида алюминия и его мезопористая структура

    Cost-effectiveness analysis of 3-D computerized tomography colonography versus optical colonoscopy for imaging symptomatic gastroenterology patients.

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    BACKGROUND: When symptomatic gastroenterology patients have an indication for colonic imaging, clinicians have a choice between optical colonoscopy (OC) and computerized tomography colonography with three-dimensional reconstruction (3-D CTC). 3-D CTC provides a minimally invasive and rapid evaluation of the entire colon, and it can be an efficient modality for diagnosing symptoms. It allows for a more targeted use of OC, which is associated with a higher risk of major adverse events and higher procedural costs. A case can be made for 3-D CTC as a primary test for colonic imaging followed if necessary by targeted therapeutic OC; however, the relative long-term costs and benefits of introducing 3-D CTC as a first-line investigation are unknown. AIM: The aim of this study was to assess the cost effectiveness of 3-D CTC versus OC for colonic imaging of symptomatic gastroenterology patients in the UK NHS. METHODS: We used a Markov model to follow a cohort of 100,000 symptomatic gastroenterology patients, aged 50 years or older, and estimate the expected lifetime outcomes, life years (LYs) and quality-adjusted life years (QALYs), and costs (£, 2010-2011) associated with 3-D CTC and OC. Sensitivity analyses were performed to assess the robustness of the base-case cost-effectiveness results to variation in input parameters and methodological assumptions. RESULTS: 3D-CTC provided a similar number of LYs (7.737 vs 7.739) and QALYs (7.013 vs 7.018) per individual compared with OC, and it was associated with substantially lower mean costs per patient (£467 vs £583), leading to a positive incremental net benefit. After accounting for the overall uncertainty, the probability of 3-D CTC being cost effective was around 60 %, at typical willingness-to-pay values of £20,000-£30,000 per QALY gained. CONCLUSION: 3-D CTC is a cost-saving and cost-effective option for colonic imaging of symptomatic gastroenterology patients compared with OC
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