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日本物理教育的危机和研究新物理课程的必要性

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国际物理教育通讯 1992年第9期 11-14页

作者： k．hirata 李世铮日本物理教育学会会长信息工程学院

日本高中物理教育中存在的最重要的问题是选学物理课的学生越来越少。我们把这种现象叫做“高中物理教育的危机”。大多数中学物理教师认为，这种情况的产生是由于大学入学考试的物理试题的命题不当，多数高中准备升学考试的负担过重．... 详细信息

日本高中物理教育中存在的最重要的问题是选学物理课的学生越来越少。我们把这种现象叫做“高中物理教育的危机”。大多数中学物理教师认为，这种情况的产生是由于大学入学考试的物理试题的命题不当，多数高中准备升学考试的负担过重．尽管这一现象是不容否认的，但笔者认为，我们的物理教师总的来随对于研究中学生如何形成概念所取得的成果映乏足够的重视．

关键词：高中物理物理课程中学物理教师物理试题物理教育升学考试入学考试命题现象存在

Depositional condition of Paleoproterozoic Francevillian carbonate rocks revisited from rare earth element contents

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Geoscience Frontiers 2024年第3期15卷 31-49页

作者： Satoshi Yoshida karen Bakakas Mayika Yuki Ishihara Mathieu Moussavou Hisashi Asanuma Tomohiko Sato Takafumi hirata Cédric Ligna Yusuke Sawaki Amboise Edou-Minko Department of Earth Science and Astronomy The University of Tokyo3-8-1 Komaba Meguro-kuTokyo 153-8902Japan Center for Northeast Asian Studies Tohoku University41 KawauchiAoba-kuSendai 980-8576Japan Department of Geology Universitédes Sciences et Techniques de MasukuBP:90190025 FrancevilleGabon Department of Earth and Planetary Science The University of Tokyo7-3-1 HongoBunkyo-kuTokyo 113-0033Japan Geochemical Research Center The University of Tokyo7-3-1HongoBunkyo-kuTokyo 113-0033Japan Graduate School of Human and Environmental Studies Kyoto UniversityYoshida-nihonmatsuSakyo-kuKyoto 606-8501Japan Center for Fundamental Education Okayama University of Science1-1Ridai-choKita-kuOkayama CityOkayama 700-0005Japan

The Paleoproterozoic Francevillian Group in the eastern Gabonese Republic has been recently attracting increasing attention because it includes distinctive macroscopic structures interpreted as eukaryotic ***,its depositional setting and associated redox conditions need to be clearly *** clarify these,petrological studies and rare earth element(REE)abundances of carbonate rocks of the Francevillian Group in the Lastoursville basin were determined with ICP-MS coupled with a laser ablation sampling *** microscopic observations indicate that dolostones in this basin underwent the complicated diagenetic history,including sparitization,decomposition of organic matter,reduction of ferromanganese oxides,silicification,and later *** dolostones of lower Francevillian B(FB)Formation show heterogeneous textures formed by alterations during *** the alterations,changes of REE abundances and degrees of positive Y anomalies appear to have *** indicates that REE signatures in carbonate rocks can vary during *** high Mn contents in the dolostones of upper FB Formation were derived from the reduction of ferromanganese oxides in *** signatures of REE abundance in dolostones can be explained by the mixing of seawater and ferromanganese oxide *** that sense,the dolostones inherited the trace element characteristics of precursor ferromanganese oxides even after the diagenesis.Y/Ho values of the most primary parts of each sample exceed 33,the newly determined threshold value for marine carbonate rocks based on our *** magnitude of the La anomaly values also falls within the range of that of Holocene reefal *** indicate that a precursor of the dolostone of the Francevillian Group was deposited in a marine *** addition,presence of Ce anomalies in the upper FB Formation suggests that the Paleoproterozoic ocean was oxidized to such an ex

关键词： Carbonate diagenesis Francevillian Group LA-ICP-MS Seawater composition Y/Ho fractionation

脑CT诊断后颅窝小卒中:脑CT迭代重建算法对检测性能的影响

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国际医学放射学杂志 2017年第6期 733-734页

作者： T.Inoue T.Nakaura M.Yoshida k.Yokoyama k.hirata M.kidoh 张毓婧 Department of Radiology Amakusa Medical Center

摘要目的本研究旨在确定脑CT全模型迭代重建(IMR-neuro)能否提高脑CT对后颅窝脑卒中的诊断准确性。方法纳入37例后颅窝缺血性脑卒中病人和37例无脑卒中

关键词：后颅窝梗死区域缺血性脑卒中 CT

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血管紧张素转换酶抑制剂降压之外的益处

世界核心医学期刊文摘（心脏病学分册） 2005年第10期1卷 60-61页

作者： hirata k. Vlachopoulos C. Adji A. O' Rourke M. F. 王亭忠 St. Vincent' s Clinic 438 Victoria Street Darlinghurst NSW 2010 Australia

The substantial benefits of ramipril over conventional therapy in high-risk patients are not always associated with clinically significant differences in brachial arterial pressure, and largely remain unexplained. We undertook this acute study to establish the magnitude of and reason for different acute effects of ramipril and atenolol on arterial pressure. Methods: We enrolled 30 patients, who took 10 mg ramipril, 100 mg atenolol, and placebo at intervals of ≥ 7 days, in a randomized, double-blind, placebo-controlled trial. After baseline, measurements were taken at 30- 60 min intervals for 5 h, and comprised cuff brachial pressure, radial artery tonometry with generation of central aortic pressure, and pulse wave velocity for aorta, upper limb and lower limb arteries. Results: Both ramipril and atenolol reduced arterial pressure, and the diastolic pressure fall was similar in the aorta and brachial artery, but the systolic pressure fall for ramipril was greater than for atenolol(by 5.2 mmHg, P< 0.0001) in the aorta compared with the brachial artery. The aortic systolic pressure difference with ramipril in comparison with atenolol was accompanied by an absolute difference of 10.7% (P< 0.0001) in the augmentation index, denoting a reduction in peripheral wave reflection by ramipril. The aortic pulse wave velocity fell to a similar degree with ramipril in comparison with atenolol, but fell to a greater degree(1.35 and 0.44 m/s, respectively, P< 0.0001 for both) in muscular arteries of the lower and upper limbs. Conclusion: A greater(average, 5.2 mmHg) decrease in aortic systolic pressure caused by ramipril may explain the greater benefit of ramipril over atenolol. The difference is attributable to decreased stiffness of peripheral arteries and a reduction in wave reflection.

关键词：雷米普利阿替洛尔动脉收缩压脉搏波传导速度肱动脉压肱动脉血压常规疗法肢体动脉下降程度外周动脉

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由ODP Leg191布设的海底井下宽频带地震仪系统

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世界地震译丛 2004年第6期35卷 80-82页

作者： M．Shinohara E．Araki T．kanazawa M．Mochizuki k．hirata k．Suyehiro H．Mikada T．Yamada Y．kaiho 周公威郝春月吕春来不详中国地震局地球物理研究所

名为WP-2的新井下地震观测站由ODP Leg191成功地布设在西北太平洋海盆的ODP1179E钻孔。为了研究地球构造,WP-2台站被安置在一个独特的点位。两套宽频带地震仪用水泥固定在玄武岩层内,通过ROV号潜艇来驱动系统并检查系统的工作状态。ROV... 详细信息

名为WP-2的新井下地震观测站由ODP Leg191成功地布设在西北太平洋海盆的ODP1179E钻孔。为了研究地球构造,WP-2台站被安置在一个独特的点位。两套宽频带地震仪用水泥固定在玄武岩层内,通过ROV号潜艇来驱动系统并检查系统的工作状态。ROV也用于回收初始数据。WP-2台站的地震噪声水平对地震观测而言是足够低的。

关键词：井下地震观测站北太平洋宽频带地震仪噪声处理安装操作

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孤立性外展神经麻痹是吉兰-巴雷综合征的局部变异型

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世界核心医学期刊文摘(神经病学分册) 2006年第8期 28-28页

作者： Tatsumoto M. Odaka M. hirata k Yuki N. 陈海 Department of Neurology Dokkyo University School of Medicine Kitakobayashi 880 Mibu Shimotsuga Tochigi 321- 0293 Japan

The authors reviewed clinical profiles and laboratory findings for 100 cases of abducens nerve paresis without impairment of the other cranial nerves, limb weakness, and ataxia throughout the clinical course. Review of the medical records of 9300 patients referred to our neuoroimmunological laboratory for serum anti- ganglioside antibody testing. Information was obtained from each primary physician on symptoms of preceding infection; initial symptoms; neurological signs during the illness; the clinical course; treatment provided; and outcome. Isolated abducens nerve paresis was present in 100 patients and bilateral paresis in 29. Tentative diagnoses made by the primary physicians on request of anti- ganglioside antibody testing were abducens nerve palsy (n = 68), Fisher syndrome (n = 14), acute ophthalmoparesis without ataxia (n = 14). Symptoms of infection anteceded in 63. Tendon reflexes were absent or decreased in 27. Distal paresthesias were experienced by seven. Serum anti- GQ1b antibody was positive in 25. These findings suggest that some cases of isolated abducens nerve palsy can be categorized as a regional variant of Guillain- Barré syndrome or mild form of Fisher syndrome.

关键词：巴雷吉兰外展神经孤立性变异型综合征综合病症

Increased prevalence of intestinal inflammation in patients with liver cirrhosis

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World Journal of Gastroenterology 1999年第5期5卷 391-396页

作者： Saitoh O Sugi k Lojima k Matsumoto H Nakagawa k kayazawa M Tanaka S Teranishi T hirata I katsu ki k Second Department of Internal Medicine Osaka Medical College Takatsuki Japan Department of Gastroenterology Ijinkai Takeda General Hospital Kyoto Japan

AIM To investigate the pathophysiology of the digestive tract in patients with liver *** In 42 cirrhotic patients and 20control subjects, the following fecal proteinswere measured by enzyme-linkedimmunosorb6nt assay: albumin (Alb ),transferrin (Tf), and al-antitrypsin (a,-AT) as amarker for intestinal protein l0ss, hemoglobin(Hb) for bleeding, PMN-eIastase for intestinalinflammation, and secretory lgA for *** The fecaI concentrations of Hb, Alb,Tf, al-AT, and PMN’eIastase were increased in13 (3l%), 8(19%), l0(24%), 6(14%), and 1l(26%) cases among 42 patients, resPectiveIy.F6cal concentration of secretory IgA wasdecreased in 7 (l7%) of 42 patients. However,these fecal concentrations were not related tothe severity or etiology of liver cirrhosis. Theserum Alb level was significantIy decreased inpatients with intestinal protein Ioss c0mpared tothat in patients without intestinal protein *** These findings suggest that: rob6sides the weIl’known pathological conditions,Such as bleeding and protein loss, intestinaIinflammati0n and decreased intestinaI immunityare found in cirrhotic patients, @ intestinalprotein loss contributes to hypoalbuminemia incirrhotic patients, and @ intestinaI inflammationshouId not b6 0verlooked in cirrhotic patients,since it may contribute to or cause intestinalprotein Ioss and oth6r various pathologicalconditions.

关键词： liver cirrhosis intestinal inflammation secretory IgA fecal proteins

Physicochemical properties of Li_(3)Ba_(2)La_(3)(MoO_(4))_(8):Eu,Tb red-emitting phosphor for solid state white lamps

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稀土学报:英文版 2023年第9期41卷 1279-1287,I0001页

作者： kora Lu Rojas Baldivia Gustavo A.hirata Center for Scientific Research and Higher Education of Ensenada Ensenada Baja California 22860Mexico Center for Nanoscience and Nanotechnology National Autonomous University of Mexico EnsenadaBaja Califomia 22860Mex

In this work,combustion synthesis was used for the first time to fabricate a phosphor material with red emission for applications in solid-state white-light *** synthesized a material with emission wavelength at λ_(em)=617 nm,excited under long UV-blue wavelength based on Eu^(3+),Tb^(3+)-activated molybdates Li_(3)Ba_(2)(La_(1-x-y)Eu_(x)Tb_(y))_(3)(MoO_(4))_(8) with 0 ≤ x ≤1 and 0 ≤ y ≤ 1.A series of powder samples were produced by the combustion method and post-annealed at 800℃ in *** crystalline phase formation was investigated by X-ray diffraction,which reveals the monoclinic C2/c(15) space *** is observed that crystalline structure and morphology are preserved when the host lattice is doped with Eu^(3+) or Tb^(3+) single ions and co-doped with both ions at different doping concentrations.A detailed characterization by scanning electron microscopy(SEM) and transmission electron microscopy(TEM)shows a similar morphology in all samples:rather large(1-7 μm) agglomerate particles with irregular shapes and surrounded by smaller nanoparticles of 50 nm in ***-visible absorption spectra confirm the presence of Eu^(3+) and Tb^(3+) *** luminescent properties of the obtained phosphors were studied in *** measurements indicate that the best emission intensity is for Eu^(3+):Tb^(3+)doping ratios of 80:0,90:0 and 20:*** the other hand,samples with 80:0,60:40,and 20:80 doping ratios show the highest intensity in a detailed photoluminescence analysis and they exhibit the highest quantum yield values.A complete and efficient energy transfer from the sensitizer Tb^(3+) to the activator Eu^(3+) is observed in all co-doped phosphors post-annealed at 800℃ for 4 ***,the Li_(3)Ba_(2)La_(3)(MaO_(4))_(8):Eu^(3+),Tb^(3+) materials fabricated by combustion synthesis are excellent phosphors for being applied as red-emitting component in solid-state white-light lamps due to an improved color rendering index(CRI) that can be obtained under lo

关键词： Molybdate Europium Terbium Luminescence Phosphor-converted LED Rare earths

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Characteristics and predictors of gastric cancer after Helicobacter pylori eradication

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World Journal of Gastroenterology 2018年第20期24卷 2163-2172页

作者： Satoki Shichijo Yoshihiro hirata Department of Gastrointestinal Oncology Osaka International Cancer Institute Division of Advanced Genome Medicine The Institute of Medical Science The University of Tokyo

Helicobacter pylori(H. pylori) eradication can reduce gastric cancer. However, gastric cancer still develops after eradication, and cases who received eradication therapy are increasing. In this study, we have reviewed the characteristics and predictors of primary gastric cancer developing after H. pylori eradication. In terms of the characteristics, endoscopic, histologic, and molecular characteristics are reported. Endoscopically, gastric cancer after eradication is often depressedtype and shows a gastritis-like appearance, which sometimes makes the diagnosis difficult. Histologically, most gastric cancer after eradication is intestinal type, and non-neoplastic epithelium, also called epithelium with low-grade atypia, is frequently seen over the tumor, which is presumably the cause of the endoscopic gastritis-like appearance. As for molecular characteristics, some markers, such as ki67, MUC2, and Wnt5a expression, are lower in cancer from patients in whom H. pylori has been eradicated. In terms of predictors, several Japanese studies have reported that severe endoscopic atrophy at eradication is a risk factor for gastric cancer development. Histologic intestinal metaplasia, especially in the corpus, and long-term use of proton pump inhibitors, are also reported as risk factors for gastric cancer after H. pylori eradication. These studies on the characteristics and predictors of gastric cancer development will become the cornerstone for establishing a novel surveillance program based on the gastric cancer risk stratification specific to H. pylori-eradicated patients.

关键词： gastric cancer eradication characteristic Helicobacter pylori predictor