Searching for Exoplanets Using Artificial Intelligence

In the last decade, over a million stars were monitored to detect transiting planets. Manual interpretation of potential exoplanet candidates is labor intensive and subject to human error, the results of which are difficult to quantify. Here we present a new method of detecting exoplanet candidates in large planetary search projects which, unlike current methods uses a neural network. Neural networks, also called "deep learning" or "deep nets" are designed to give a computer perception into a specific problem by training it to recognize patterns. Unlike past transit detection algorithms deep nets learn to recognize planet features instead of relying on hand-coded metrics that humans perceive as the most representative. Our convolutional neural network is capable of detecting Earth-like exoplanets in noisy time-series data with a greater accuracy than a least-squares method. Deep nets are highly generalizable allowing data to be evaluated from different time series after interpolation without compromising performance. As validated by our deep net analysis of Kepler light curves, we detect periodic transits consistent with the true period without any model fitting. Our study indicates that machine learning will facilitate the characterization of exoplanets in future analysis of large astronomy data sets.Comment: Accepted, 16 Pages, 14 Figures, https://github.com/pearsonkyle/Exoplanet-Artificial-Intelligenc

The Unmaking of an Embargo: How Policy Entrepreneurs at the Individual, State, and National Levels are Creating New Paths for Policy Change in Modern United States-Cuba Relations

Throughout the Cold War antagonisms of the twentieth century, the United States (US) championed greater global economic cooperation and an embrace of free market principles to encourage economic growth. Post World War II, passage of the Bretton Woods Agreement institutionalized this political agenda effectively establishing the rules of global commerce. The result has been increased economic participation and trade liberalization. One of the last remaining vestiges of Cold War hostility and impediments to trade is the US economic embargo of Cuba, in place since 1960. Increasingly seen as a policy failure, the US has taken steps in the past two years to normalize relations with Cuba. At the same time, after extended conflicts in Afghanistan and Iraq, economic recession, and political polarization over the last fifteen years the US finds itself in a position of ambiguity towards additional foreign commitments. American efforts to open Cuba to two-way commerce serve both national security and economic foreign policy agendas. For Cubans, removal of the embargo represents an opportunity for normal relations with the world’s largest economy and access to capital and markets that come with it. The purpose of this study is to test the theory political economy, which attempts to understand society through the intersection of economic, political, and social functions, using US-Cuba diplomacy as a case study (Yin, 2009). Working within a multiple streams framework, the investigator examined how economic policy is changed under politically ambiguous conditions through a series of 20 semi-structured qualitative interviews and content analysis of secondary data sources (Zahariadis, 2014). Specifically, the study explored the behavior of interested individuals from the US and Cuba, so-called policy entrepreneurs, and their influence on the policymaking process during an open policy window. Research results suggest that policy entrepreneurs operate at the individual, state, and national scales of society using a variety of symbols to create and broaden opportunities for policy change. Across all three levels, US and Cuban policy entrepreneur’s behavior is guided by the search for rationality in ambiguous times, but their agency is bounded by the institutionally determined parameters of what is legally and politically acceptable

The Unmaking of an Embargo: How Policy Entrepreneurs at the Individual, State, and National Levels are Creating New Paths for Policy Change in Modern United States-Cuba Relations

Throughout the Cold War antagonisms of the twentieth century, the United States (US) championed greater global economic cooperation and an embrace of free market principles to encourage economic growth. Post World War II, passage of the Bretton Woods Agreement institutionalized this political agenda effectively establishing the rules of global commerce. The result has been increased economic participation and trade liberalization. One of the last remaining vestiges of Cold War hostility and impediments to trade is the US economic embargo of Cuba, in place since 1960. Increasingly seen as a policy failure, the US has taken steps in the past two years to normalize relations with Cuba. At the same time, after extended conflicts in Afghanistan and Iraq, economic recession, and political polarization over the last fifteen years the US finds itself in a position of ambiguity towards additional foreign commitments. American efforts to open Cuba to two-way commerce serve both national security and economic foreign policy agendas. For Cubans, removal of the embargo represents an opportunity for normal relations with the world’s largest economy and access to capital and markets that come with it. The purpose of this study is to test the theory political economy, which attempts to understand society through the intersection of economic, political, and social functions, using US-Cuba diplomacy as a case study (Yin, 2009). Working within a multiple streams framework, the investigator examined how economic policy is changed under politically ambiguous conditions through a series of 20 semi-structured qualitative interviews and content analysis of secondary data sources (Zahariadis, 2014). Specifically, the study explored the behavior of interested individuals from the US and Cuba, so-called policy entrepreneurs, and their influence on the policymaking process during an open policy window. Research results suggest that policy entrepreneurs operate at the individual, state, and national scales of society using a variety of symbols to create and broaden opportunities for policy change. Across all three levels, US and Cuban policy entrepreneur’s behavior is guided by the search for rationality in ambiguous times, but their agency is bounded by the institutionally determined parameters of what is legally and politically acceptable

Virtual field trip design and development: Mission San Diego de Alcala

This design and development project focused on creating an online virtual field trip of Mission San Diego de Alcala (San Diego Mission) for use by California fourth grade teachers. This CD-ROM was designed to assist the teacher and enhance a field trip to California\u27s first mission

Preparing for Storms in Louisiana Facilitator\u27s Guide, 2nd Edition

The facilitator\u27s guide helps educators navigate through the risk literacy student manual, Preparing for Storms in Louisiana, and teach its contents to his or her class

Preparing for Storms in Louisiana Take Home Guide, 2nd Edition (English)

Louisiana is at risk from natural and man-made disasters. Flooding, tropical storms, and hurricanes happen. To stay safe, sometimes you and your family will need to leave home before a storm comes. People in Louisiana need to be ready for emergencies. This is your take home guide. It helps you prepare for storms

XO-2b: a hot Jupiter with a variable host star that potentially affects its measured transit depth

The transiting hot Jupiter XO-2b is an ideal target for multi-object photometry and spectroscopy as it has a relatively bright ($V$-mag = 11.25) K0V host star (XO-2N) and a large planet-to-star contrast ratio (R$_{p}$/R$_{s}\approx0.015$). It also has a nearby (31.21") binary stellar companion (XO-2S) of nearly the same brightness ($V$-mag = 11.20) and spectral type (G9V), allowing for the characterization and removal of shared systematic errors (e.g., airmass brightness variations). We have therefore conducted a multiyear (2012--2015) study of XO-2b with the University of Arizona's 61" (1.55~m) Kuiper Telescope and Mont4k CCD in the Bessel U and Harris B photometric passbands to measure its Rayleigh scattering slope to place upper limits on the pressure-dependent radius at, e.g., 10~bar. Such measurements are needed to constrain its derived molecular abundances from primary transit observations. We have also been monitoring XO-2N since the 2013--2014 winter season with Tennessee State University's Celestron-14 (0.36~m) automated imaging telescope to investigate stellar variability, which could affect XO-2b's transit depth. Our observations indicate that XO-2N is variable, potentially due to {cool star} spots, {with a peak-to-peak amplitude of $0.0049 \pm 0.0007$~R-mag and a period of $29.89 \pm 0.16$~days for the 2013--2014 observing season and a peak-to-peak amplitude of $0.0035 \pm 0.0007$~R-mag and $27.34 \pm 0.21$~day period for the 2014--2015 observing season. Because of} the likely influence of XO-2N's variability on the derivation of XO-2b's transit depth, we cannot bin multiple nights of data to decrease our uncertainties, preventing us from constraining its gas abundances. This study demonstrates that long-term monitoring programs of exoplanet host stars are crucial for understanding host star variability.Comment: published in ApJ, 9 pages, 11 figures, 3 tables; updated figures with more ground-based monitoring, added more citations to previous work

Preparing for Storms in Louisiana Take Home Guide, 2nd Edition (English/Spanish)

Louisiana is at risk from natural and man-made disasters. Flooding, tropical storms, and hurricanes happen. To stay safe, sometimes you and your family will need to leave home before a storm comes. People in Louisiana need to be ready for emergencies. This take home guide will help you get prepared