10,892 research outputs found

    Oral History Interview: Mark Moore

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    This interview is one of a series conducted concerning West Virginia Vietnam veterans. Mr. Moore discusses: his family, including his father and brother serving in Vietnam; his college career and his degree in art; art in general as well as painting and printmaking; other artists and veterans he knew; his employment (including a story about emptying mud from a field for a construction crew); a story of being physically assaulted in Washington D.C.; and his service in the Navy.https://mds.marshall.edu/oral_history/1038/thumbnail.jp

    Efficient 1123nm diode-bar pumped Nd:YAG laser

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    Laser emission at 1123nm has a number of possible applications, the most notable being differential absorption water vapour LIDAR, to remotely sense concentrations of water vapour in the atmosphere For this application use is made of two different wavelengths, one, at 1123.06nm which coincides with a peak absorption peak of water vapour, while the other at 1123.2nm which falls in a region of very low water absorption. Nd YAG provides the possibility for laser emission at both of the required wavelengths, and has been recognised as a suitable laser source for such a system. However the emission cross-section of Nd:YAG at 1123nm is very small, approximately one fifteenth that of the 1064nm line, hence resulting in very low gain. Thus to achieve efficient laser operation at 1123nm, a very bright pump source is required so that intense pumping can be achieved. In this paper we describe a diode-pumped Nd:YAG laser pumped by such a bright source. The pump-diode used was a 7W diode-bar operating at 807nm, manufactured by the Opto-Power Corporation. The diode emission, which came from a 1.6mm wide region. was reshaped using the previously reported two-mirror 'beam-shaping' technique. The resulting beam had 5.6W of power, was approximately circular, and had M2 values of ~20 and ~40 in orthogonal directions. This was used to end-pump a 10mm long Nd:YAG rod, housed in a water-cooled heat-sink. To obtain intense pumping, the pump light was focused to a spot size of radius 130µm. The small spot-size results in a strong thermal lens in the laser rod, measured to have a focal length of ~55mm, but also being significantly aberrated, and thus requiring care over the choice of appropriate resonator. This Nd:YAG laser produed an output of 1.6W at 1123nm, in a linearly polarised, diffraction limited gaussian beam, from a standing wave cavity. This is around a five-fold increase in power on previous reports for this wavelength narrow linewidth emission is required for a working LIDAR, thus a unidirectional ring cavity was constructed to enable single frequency operation. This produced 180mW of single frequency diffraction-limited output, which could be tuned to the wavelengths of interest. Owing to a lack of suitable components (e.g. a low loss Faraday rotator), this performance is far from optimal. Further improvements will be discussed

    High power 1123nm Nd:YAG laser longitudinally pumped by a 7W diode bar

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    We report efficient operation at 1123nm of a Nd:YAG laser end-pumped by a 7W diode-bar. Despite the low gain of this transition, an output power of 1.6W TEM00 has been obtained for 5.6W of incident pump power

    Congressman Blake Moore

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    Congressman Blake Moore is a native of Ogden, Utah. Before being elected to Congress, Blake worked for small businesses and in the foreign service, experiences that now guide his work on domestic and foreign policy. He has expertise in education, financial services, public policy, healthcare, transportation, supply chain, and waste industries, and this work informs his customer service and problem solver approach in Washington, D.C., as he identifies ways to help the federal government better work for Northern Utah. His passion for helping organizations manage the change process drives his ambition to overcome partisan gridlock, improve federal agencies, and smartly streamline the nation’s bureaucracy. Blake obtained a Master’s in Public Policy and Administration from Northwestern University. He graduated from the University of Utah after serving a mission for the Church of Jesus Christ of Latter-Day Saints in Seoul, South Korea, and signing a scholarship to play as the quarterback at Utah State University

    KUNM Interviews Jennifer Moore about refugees, asylum, and international law

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    How The U.S. Ignores Immigration And Asylum Laws, by Megan Kamerick. Immigrant. Refugee. Asylum. These are words we’ve been hearing a lot this year. But what are the laws around refugees in the United States and internationally and is the U.S. following its legal obligations? On this episode of University Showcase, we talk with Professor Jennifer Moore. She\u27s an expert on refugee law and teaches it at UNM. Moore co-authored one of the first law school text books on refugee law. Prior to joining UNM in 1995, she worked with the United Nations High Commission on Refugees in West Africa and in Washington D.C. She also did work for UNHCR in Croatia on post-conflict reconstruction, and she was a Fulbright Scholar in Tanzania teaching human rights law. Last year she received the Sarah Belle Brown Community Service Award from UNM for her “inspirational example of advocacy and social responsiveness.

    Rites of Spring concert flier, Food For Thought, Washington, D.C. - December 15, 1984

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    Photocopy of an advertising flier promoting a concert by the Washington, D.C. punk band, Rites Of Spring. The concert occurred on December 15, 1984 at Food For Thought, a restaurant/concert venue in Washington, D.C. The other bands on the bill were the Washington, D.C. punk bands Gray Matter and Grand Mal. The photocopy was made by D.C. artist, author, and musician Sharon Cheslow as part of the research for "Banned in D.C.," a book she co-authored with Cynthia Connolly and Leslie Clague

    D.C. Motor Blueprint

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    Folder containing the proposed arrangement of D.C. motor, arrangements for P3, P2, P4, P5, P6, P8 and P9 machines and blueprints of motors and generators by Mather & Platt Ltd, Park Works, Manchester

    National Gallery of Art East Wing, Washington, D.C.

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    Exterior, sculpture (by Henry Moore

    Arrangement of D.C. Motor (T.P. 13) Blueprint

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    Blueprint of arrangement of D.C. Motor(T.P. 13), stamped by Mather & Platt Ltd., of Manchester X39,245.A
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