274 research outputs found
The International Linear Collider
No full textThe International Linear Collider (ILC) is a proposed electron-positron collider for the centre-of mass energy range of 200 to 500 GeV and with upgrade options towards 1 TeV. The ILC would be the ideal tool to explore with high precision the properties of the new Higgs-like particle that has recently been discovered at the LHC with a mass of around 125 GeV. The ILC accelerator design is based on the mature superconducting technology that has been developed in the TESLA collaboration and that is currently being used for the European XFEL. The exploitation of the huge physics potential of the ILC is a challenge for the design of the ILC detectors
A Signature of Roaming Dynamics in the Thermal Decomposition of Ethyl Nitrite: Chirped-Pulse Rotational Spectroscopy and Kinetic Modeling
No full textChirped-pulse (CP) Fourier transform rotational spectroscopy is uniquely suited for near-universal quantitative detection and structural characterization of mixtures that contain multiple molecular and radical species. In this work, we employ CP spectroscopy to measure product branching and extract information about the reaction mechanism, guided by kinetic modeling. Pyrolysis of ethyl nitrite, CH[subscript 3]CH[subscript 2]ONO, is studied in a Chen type flash pyrolysis reactor at temperatures of 1000–1800 K. The branching between HNO, CH[subscript 2]O, and CH[subscript 3]CHO products is measured and compared to the kinetic models generated by the Reaction Mechanism Generator software. We find that roaming CH[subscript 3]CH[subscript 2]ONO → CH[subscript 3]CHO + HNO plays an important role in the thermal decomposition of ethyl nitrite, with its rate, at 1000 K, comparable to that of the radical elimination channel CH[subscript 3]CH[subscript 2]ONO → CH[subscript 3]CH[subscript 2]O + NO. HNO is a signature of roaming in this system.Donors of the American Chemical Society Petroleum Research Fund (Grant 50650-ND6)United States. Dept. of Energy. Office of Basic Energy Sciences (Award DEFG0287ER13671)United States. Dept. of Energy. Office of Basic Energy Sciences (Award DE-SC0001198)Swiss National Science Foundation (Postdoctoral Research Grant PBEZB2-140081
The Status of Women Leaders in Utah Public Education (K–12): A 2022 Update
No full textIn 2014, the Utah Women & Leadership Project (UWLP) released a research and policy brief titled “The Status of Women Leaders in Utah Education,”1 and an updated version was published in 2017.2 The reports focused on the status of women’s leadership in all Utah education sectors. In 2021, UWLP updated the postsecondary education portion of the brief,3 and this report provides an update of the K–12 portion. The purpose of this brief is to determine what, if any, progress has been made in women’s leadership within Utah’s K–12 education sector, including public and charter schools. This brief compares Utah data with national data and reviews the applicable literature. Finally, comparisons of current data with 2014 and 2017 data reveal trends and pinpoints the crucial work that lies ahead
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