62 research outputs found

    The Political Economies of Broadband Development in Korea and Japan

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    South Korea’s and Japan’s telecommunications sectors developed rapidly, especially in high-speed, low-priced broadband. We argue that both countries are engaged in strategic liberalization, fostering competition to reach specific goals. However, different political dynamics pushed their initially similar policy regimes apart. Korea retained its managed competition regime while Japan experienced a regime shift

    ジョウチョウカンマク ジョウミャク ケッセンショウ ノ イチレイ

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    We report a case of superior mesenteric vein thrombosis successfully saved by resection of enteral necrosis. A 67 years-old man who admitted for abdominal pain was diagnosed with acute enterocolitis and treated. After two days, abdominal pain increased and abdominal CT revealed superior mesenteric vein thrombosis. He was referred to the department of surgery. We conducted emergency operation. During surgery, bloody ascites and the enteral necrosis about50cm in length was confirmed. The necrotic ileum was resected and an end-to-end anastomosis was performed. Immediately after surgery, we started anticoagulation therapy. The patient recoverd well and was discharged on POD32. In a slow pattern like this case, we should suspect superior mesenteric vein thrombosis and diagnose by abdominal CT

    ダイチョウ ガン ニ タイスル 5 FU アイソボリン リョウホウ デ コウカ ガ ミトメラレタ 2レイ

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    We report 2 cases of rectal cancer responding to postoperative chemotherapy with 5-fluorouracil and isovorin. Case 1 : A 60 years-old woman underwent low-anterior resection for rectal cancer in 1994 and partial right lung resection for metastatic lung cancer in 1998. She underwent chemotherapy with 5-fluorouracil and isovorin for mediastinal lymph node metastasis and high score of serum CEA in 2000. After the chemotherapy, the lymph node shrank and serum CEA normalized. Case 2 : A 75 years-old woman underwent low-anterior resection and hysterectomy for rectal cancer with multiple lung metastasis in 2000. She underwent postoperative chemotherapy with 5-fluorouracil and isovorin for metastatic lung cancer. The lung tumor shrank and serum CEA decreased. Chemotherapy with 5-fluorouracil and isovorin seemed to be effective for advanced colon cancer. We should reconfirm the effectiveness and improve the directions for use

    Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign

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    Abstract: In 2017, the Event Horizon Telescope (EHT) Collaboration succeeded in capturing the first direct image of the center of the M87 galaxy. The asymmetric ring morphology and size are consistent with theoretical expectations for a weakly accreting supermassive black hole of mass ∼6.5 × 109 M ⊙. The EHTC also partnered with several international facilities in space and on the ground, to arrange an extensive, quasi-simultaneous multi-wavelength campaign. This Letter presents the results and analysis of this campaign, as well as the multi-wavelength data as a legacy data repository. We captured M87 in a historically low state, and the core flux dominates over HST-1 at high energies, making it possible to combine core flux constraints with the more spatially precise very long baseline interferometry data. We present the most complete simultaneous multi-wavelength spectrum of the active nucleus to date, and discuss the complexity and caveats of combining data from different spatial scales into one broadband spectrum. We apply two heuristic, isotropic leptonic single-zone models to provide insight into the basic source properties, but conclude that a structured jet is necessary to explain M87’s spectrum. We can exclude that the simultaneous γ-ray emission is produced via inverse Compton emission in the same region producing the EHT mm-band emission, and further conclude that the γ-rays can only be produced in the inner jets (inward of HST-1) if there are strongly particle-dominated regions. Direct synchrotron emission from accelerated protons and secondaries cannot yet be excluded
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