Holding Phenomenon of Annual Ring in Sugi (Cryptomeria japonica D. Don.) Specimen under Large Compression with Closed-Die Forging Method.
نویسندگان
چکیده
منابع مشابه
Allergic conjunctivitis caused by sugi (Cryptomeria japonica D. Don) pollen out of season.
Allergic conjunctivitis caused by sugi pollen is considered to be strictly a "spring disease". However, a recent report indicated that sugi pollen is scattered not only in spring but in all seasons, especially in the autumn. We retrospectively determined the number of patients with allergic conjunctivitis caused by sugi pollen during each month for 3 consecutive years, and also investigated the...
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BACKGROUND Pollen information is indispensable for allergic individuals and clinicians. This study aimed to develop forecasting models for the total annual count of airborne pollen grains based on data monitored over the last 20 years at the Mie Chuo Medical Center, Tsu, Mie, Japan. METHODS Airborne pollen grains were collected using a Durham sampler. Total annual pollen count and pollen coun...
متن کاملBiomass and morphology of fine roots of sugi (Cryptomeria japonica) after 3 years of nitrogen fertilization
Increasing nitrogen (N) deposition may affect carbon and nutrient dynamics in forest ecosystems. To better understand the effects of N deposition, we need to improve our knowledge of N effects on fine roots (roots <2 mm in diameter), as they are a key factor in carbon and nutrient dynamics. In this study, we fertilized 1 × 2 m plots in a sugi (Cryptomeria japonica) stand (336 kg ha(-) (1) y(-) ...
متن کاملModeling Diameter Growth and Self-Thinning in Planted Sugi (Cryptomeria japonica) Stands
Abstract: The objectives of this study were to analyze diameter growth in relation to natural thinning in high-density stands in even-aged, pure plantation forests and to develop a growth prediction system based on Japanese permanent plot data. Long-term data recorded in even-aged, pure, unthinned stand plots of Sugi (Cryptomeria japonica) forests were available. Relationships between log-trans...
متن کاملOptimization of Flash, Billet Dimensions and Friction Factor in Closed Die Cold Forging Process
Three important parameters in designing a closed die for forging process are ratio of width to flash thickness, ratio of height to billet diameter and the friction factor. In this paper the influences of these parameters on the required force for the forging and percentage of die filling were investigated. It was found that by controlling the flash dimension, the material loss is reduced and t...
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ژورنال
عنوان ژورنال: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
سال: 1997
ISSN: 0387-5024,1884-8354
DOI: 10.1299/kikaic.63.3674