449 research outputs found

    A Regression Model to Predict Stock Market Mega Movements and/or Volatility Using Both Macroeconomic Indicators & Fed Bank Variables

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    In finance, regression models or time series moving averages can be used to determine the value of an asset based on its underlying traits. In prior work we built a regression model to predict the value of the S&P 500 based on macroeconomic indicators such as gross domestic product, money supply, produce price and consumer price indices. In this present work this model is updated both with more data and an adjustment in the input variables to improve the coefficient of determination. A scheme is also laid out to alternately define volatility rather than using common tools such as the S&P’s trailing volatility index (VIX). As it is well known during times of increased volatility models like the Black-Scholes will be less reliable, hence, this work can be used to identify such times in a forward moving timeframe rather than using trailing economic indicators

    What Works in Improving Gender Equality

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    EPDF and EPUB available Open Access under CC-BY-NC licence. This book provides an accessible analysis of what gender equality means and how we can adapt best practice in care policies from other countries. It provides realistic feasible policy solutions, the role of individuals, families, communities, the market and the state, and the difficulties in different policy contexts

    Writing in Britain and Ireland, c. 400 to c. 800

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    What Works In Improving Gender Equality: International Best Practice in Childcare and Long-term Care Policy

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    Drawing on comparative research from five countries, What Works in Improving Gender Equality provides an accessible analysis of what gender equality means and how we can achieve it by adapting best practices in care policies from other countries. Realistic policy solutions are reached by examining the contexts in which childcare and longterm care policies are developed, and what difficulties might need to be overcome in applying the lessons from different international models

    Project Atlas: A Mobile Universal Rocket Engine Test Stand

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    Project Atlas is a mobile, trailer-mounted, rocket engine test stand developed by Experimental Rocket Propulsion Lab (ERPL) at Embry-Riddle Aeronautical University’s Daytona Beach, Florida campus. The integrated test stand and automated data-acquisition and control system supports ERPL’s multitude of engine research projects, including bipropellant liquid and hybrid rocket engines. The need for an integrated universal mobile test stand stems from the inability to conduct frequent test fires on campus due to Class-3 airspace and liability issues. The test stand is designed as a horizontal thrust structure utilizing a dual flame duct to redirect and cancel reaction forces acting upon the test stand. This duct minimizes the required anchoring strength and allows for friction-based anchoring systems. Forward of the blast shield and engine mount, there is an instrumentation system to measure thrust, temperature, and pressure inside the combustion chamber of the engine as well as the pressures and temperatures of the propellant feed system. The test stand’s data acquisition system is directly interfaced with the test stand’s on-board computer and control system, which executes automated test sequences. The Atlas mobile test stand enables further rocket engine design and evaluation, significantly helping to advance the university’s propulsion development capabilities

    What Works In Improving Gender Equality: International Best Practice in Childcare and Long-term Care Policy

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    Drawing on comparative research from five countries, What Works in Improving Gender Equality provides an accessible analysis of what gender equality means and how we can achieve it by adapting best practices in care policies from other countries. Realistic policy solutions are reached by examining the contexts in which childcare and longterm care policies are developed, and what difficulties might need to be overcome in applying the lessons from different international models.EPDF and EPUB available Open Access under CC-BY-NC licence: https://library.oapen.org/handle/20.500.12657/4684

    Broadly tunable femtosecond pulses around 2.06 µm from a diode-pumped Tm3+-doped solid-state laser source

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    Funding: Engineering and Physical Sciences Research Council (EPSRC) (EP/L01596X/1); Fraunhofer UK Research Limited studentship funding.We report on a broadly tunable diode-pumped femtosecond Tm:LuScO3 laser source around 2.06 µm. Tuning was obtained through the use of a steeply diving birefringent filter, maintaining sub-600 fs pulses over a tuning range of 2019–2110 nm. The minimum pulse duration of 240 fs was recorded at a central wavelength of 2080 nm with an average output power of 93 mW. Higher output coupling of 2% resulted in a narrower tuning range of 2070–2102 nm with generated pulses as short as 435 fs and an average output power of 119 mW at 2090 nm.Publisher PDFPeer reviewe

    Waveguide Tm:Lu2O3 ceramic laser fabricated by ultrafast laser inscription

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    Summary form only given. Ultrafast laser inscription (ULI) allows the fabrication of compact, highly-efficient and robust laser sources over a broad range of crystalline, ceramic and glass gain media. For instance, subsurface waveguides can be formed by the stress induced refractive index modification effect which takes place between two parallel modified regions referred to as “Type II” guiding [1]. Previously, a family of laser hosts known as sesquioxides, namely Lu2O3, Sc2O3 and LuScO3, have been shown to demonstrate efficient, high-power and tunable laser operation around the 2 μm region in both continuous-wave and pulsed regimes when doped with Tm3+ [2, 3]. Combining the Tm3+-doped sesquioxide material properties with the ULI waveguide laser geometry provides a means to produce compact, low-threshold and efficient laser sources near 2 μm with the potential for high pulse repetition rate ultrafast operation. Here we report, to the best of our knowledge, the first demonstration of a ceramic Tm:Lu2O3 waveguide laser source fabricated by ULI.Postprin
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