巻号一覧
26 巻, 2 号
選択された号の論文の4件中1～4を表示しています
- |<
- <
- 1
- >
- >|
-
片岡 健次郎, 佐藤 正平1964 年 26 巻 2 号 p. 39-45
発行日: 1964年
公開日: 2009/09/04
ジャーナル フリーThis report deals with the bend of lower part of afforested cryptomeria caused by creeping pressure and settling force of snow deposit in the neighborhood of Yamagata Branch Station. Frequency of the bend amount to 100 percents in the sites where mean diameter breast high is less than 10 centimeters and even in the sites of the mean diameter of 30 centimeters it shows more than 80 percents. When the shapes of stems are classified as following according to bending 0 (almost straight), I (slightly bent), II (remarkably bent), III (most remarkably bent), total percentage of 0 and I shows 58 percents and that of II and III shows 42 percents, this figures show that percentage of large extent of bend occupies more than half.
Occurrence of bend depends on the growth and the sites of small increment tends to show large percentage of bend.
The lowest percentage of bend appears in the sites with the gradient of 5 degrees, and the percentage becomes higher when the gradient is steeper or more gentle than 5 degrees gradually. Level site and 20 degrees slope show about same percentage of the bend. From topographical viewpoint, the percentage of the bend is relatively low in the sites such as convex surfaces or terraces and it is high inversely in the sites such as concave or intricate surfaces.
The relation between the ratio of bent part to the whole stem volume in percent (R) and slope in degrees (α) is expressed as following;
R=0.34α+7.5
The coefficient 7.5 is related to snow depth and is determined in the area of about 1.5 meters depth, however, it should be presumed to fluctuate to some extent depending upon the physical properties of snow deposit.抄録全体を表示PDF形式でダウンロード (1307K) -
菊地 勝弘1964 年 26 巻 2 号 p. 46-50
発行日: 1964年
公開日: 2009/09/04
ジャーナル フリーIn the summer of 1960, the Hokkaido University Scientific Expedition carried out glaciological investigations on the Mendenhall Glacier in Juneau Ice Field, Alaska. This paper is food reports of the expedition and contains details of foods of the party in the base and the advanced camp for about two months.抄録全体を表示PDF形式でダウンロード (792K) -
日下部 正雄1964 年 26 巻 2 号 p. 51-54
発行日: 1964年
公開日: 2009/09/04
ジャーナル フリー暖房の設計, 計画の資料として, t0=8℃, te=12℃, すなわち外気温が8℃以下となった時に暖房を行い, 木造住宅の室温を12+4=16℃ (コンクリート建物であれば12+6=18℃) に保った場合の暖房度日数を計算した。まず北海道各地の平年の暖房度日数と, 暖房の初日と終日および暖房日数を求め, それらの分布図をえがいて法令による石炭手当の支給区分と比較した。次に30年の統計の得られる8地点について暖房度日数と, 暖房の初日, 終日の年による変動を調べ, 特に札幌については旬別にその状態を明らかにした。抄録全体を表示PDF形式でダウンロード (577K) -
東 晃, 板垣 和彦1964 年 26 巻 2 号 p. 55-61
発行日: 1964年
公開日: 2009/09/04
ジャーナル フリーPDF形式でダウンロード (3196K)
- |<
- <
- 1
- >
- >|