東日本大震災の影響に関する無形民俗文化財アンケート調査報告

　　The research team of the Department of Intangible Cultural Heritage conducted an investigation based on a questionnaire in order to examine the trend of influence of the Great East Japan Earthquake on intangible cultural heritages. Questionnaires were sent out to Iwate, Miyagi and Fukushima prefectures concerning intangible cultural heritages designated by the nation, prefecture, city, town and villages of each prefecture. The questionnaire was made in two periods, February 2020 and January to February 2021. Of the 1153 groups concerned with designated intangible cultural heritages, 633 groups responded. Upon confirmation of the condition of damage caused by the Earthquake, questions were asked on “the frequency of performance,” “place of execution” and “funds for activities.” These 4 points were asked from the point of view of time – “before the disaster,” “immediately after the disaster,” and “ now that 10 years have passed.” In other words, the aim was to clarify through this research the changes that occurred from before the disaster to the present. As a result the following points were found. 1) In many aspects, changes were seen immediately after the disaster but after 10 years there is much movement to return to the condition before the disaster. 2) The influence of the Earthquake extended to the inland regions where Tsunami did not strike and exposed issues connected with declining birth rate and depopulation. Although these points have already been revealed by various investigations and previous studies, the fact that they have been supported objectively by numerical numbers shows the significance of the present study

[新たな社会の創発を目指してvol.2]地域文化と博物館

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2002ネン オヨビ 2003ネン カキ ナンキョクカイ ノ トウケイ 140ド セン ニ ソッタ プランクトン ノ ブンプ パターン

2002年及び2003年の南極海の夏季,東部インド洋区のウイルクスランド沖の東経140度線上において,白鳳丸及びタンガロアによる3回の調査航海によって行われたRMT-8(目合: 4.5mm, 開口面積: 8m3)ネット採集によって得られた標本に基づいて,大型動物プランクトン群集構造を調べた.クラスター解析の結果,大型動物プランクトン群集は,南極周極流の南縁(SB-ACC: Southern Boundary of the Antarctic Circumpolar Current)で大きく二つの群集に分けられた.すなわち,SB-ACCの北方では大型動物プランクトン群集は,Salpa thompsoni, Euphausia frigida及びThemisto gaudichaudiiなどのoceanic communityが卓越していた.一方,SB-ACCの南方ではEuphausia superba及びEuphausia crystallorophiasなど大陸寄りに主分布域をもつ動物プランクトンが卓越していた.SB-ACCは,南極海の上記の主要な大型動物プランクトン種の出現の差によって特徴付けられることが示唆された.Field surveys were conducted along 140°E in the Southern Ocean north of Terre Adelie during three cruises: the KH cruise by RV Hakuho Maru, and TC1 and TC2 cruises by RV Tangaroa during the austral summers of 2002 and 2003. Macrozooplankton were sampled using a Rectangular Midwater Trawl (RMT 8: mesh size: 4.5mm; effective mouth area: 8m2) along each transect. Macrozooplankton communities were separated by the Southern Boundary of the Antarctic Circumpolar Current (SB-ACC) based on cluster analysis. North of the SB-ACC, macrozooplankton assemblages comprised species of the northern oceanic community characterized by Salpa thompsoni, Euphausia frigida and Themisto gaudichaudii, while south of the SB-ACC, macrozooplankton assemblages were numerically dominated by Euphausia superba and/or Euphausia crystallorophias. It is suggested that the SB-ACC functions as the major biogeographic barrier to separate the macrozooplankton communities, and the contributions of macro- and meso-zooplankton to total zooplankton abundance varies seasonally as well as regionally in the Indian sector of the Southern Ocean crossing the SB-ACC

The vertical distribution and abundance of copepod nauplius around the marginal ice zone along 110°E in the Antarctic Ocean

第6回極域科学シンポジウム[OB] 極域生物圏11月16日（月）　国立極地研究所１階交流アトリウ

Comparison of abundance and biomass of dominant copepods around the marginal ice zone along the 110°E in the Antarctic Ocean

第6回極域科学シンポジウム[OB] 極域生物圏11月16日（月）　国立極地研究所１階交流アトリウ

Observation results by the TAMA300 detector on gravitational wave bursts from stellar-core collapses

We present data-analysis schemes and results of observations with the TAMA300 gravitational-wave detector, targeting burst signals from stellar-core collapse events. In analyses for burst gravitational waves, the detection and fake-reduction schemes are different from well-investigated ones for a chirp-wave analysis, because precise waveform templates are not available. We used an excess-power filter for the extraction of gravitational-wave candidates, and developed two methods for the reduction of fake events caused by non-stationary noises of the detector. These analysis schemes were applied to real data from the TAMA300 interferometric gravitational wave detector. As a result, fake events were reduced by a factor of about 1000 in the best cases. The resultant event candidates were interpreted from an astronomical viewpoint. We set an upper limit of 2.2x10^3 events/sec on the burst gravitational-wave event rate in our Galaxy with a confidence level of 90%. This work sets a milestone and prospects on the search for burst gravitational waves, by establishing an analysis scheme for the observation data from an interferometric gravitational wave detector