32 research outputs found
Wind- and Operation-Induced Vibration Measurements of the Main Reflector of the Nobeyama 45 m Radio Telescope
As deformations of the main reflector of a radio telescope directly affect
the observations, the evaluation of the deformation is extremely important.
Dynamic characteristics of the main reflector of the Nobeyama 45 m radio
telescope, Japan, are measured under two conditions: The first is when the
pointing observation is in operation, and the second is when the reflector is
stationary and is subjected to wind loads when the observation is out of
operation. Dynamic characteristics of the main reflector are measured using
piezoelectric accelerometers. When the telescope is in operation, a vibration
mode with one nodal line horizontally or vertically on the reflector is
induced, depending on whether the reflector is moving in the azimuthal or
elevational planes, whereas under windy conditions, vibration modes that have
two to four nodal lines are simultaneously induced. The predominant mode is
dependent on the direction of wind loads.Comment: Accepted for publication in Journal of Vibration Engineering &
Technologie
Aleukemic leukemia cutis in a patient with Philadelphia chromosome-positive biphenotypic leukemia.
Aleukemic leukemia cutis is a rare condition characterized by the invasion of leukemic blasts into the skin before their appearance in the peripheral blood. Leukemia cutis usually occurs in patients with myeloid leukemia, especially the myelomonocytic and monocytic types of acute myeloblastic leukemia. We describe the case of a 62-year-old woman with aleukemic leukemia cutis who developed Philadelphia-positive acute leukemia 1 month after skin involvement. Leukemic cells expressed both myeloid and B-cell lineage surface markers, and monoclonal rearrangement of the immunoglobulin heavy chain was detected by Southern blot analysis. This report is the first of a case of aleukemic leukemia cutis preceding Philadelphia-positive biphenotypic leukemia
Usefulness of magnifying endoscopic evaluation of the terminal ileum for a patient with graft-versus-host disease after allogeneic hematopoietic stem cell transplantation
The gastrointestinal tract is one of the common targets of acute graft-versus-host disease (GVHD), but accurate diagnosis is difficult because of the nonspecific nature of complicated diseases and the lack of diagnostic findings by conventional endoscopy. Recently, a magnifying endoscope has been developed and used for examining microstructures of the mucosa. Herein, we report the first use of a magnifying endoscope for a patient with gastrointestinal (GI) GVHD. Magnified endoscopic findings of atrophic and coalescent villi of the terminal ileum reflect histological findings of GVHD. Magnifying endoscopy of the terminal ileum may be useful for early detection and follow-up of GI GVHD