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濟州島 人工草地 植生의 經時的 變化에 관한 硏究 : 草種의 李節 및 年次的 變化 The Seasonal and Annual Changes in Species
金翰琳,趙南棋,宋昌吉 제주대학교 1981 논문집 Vol.13 No.-
本 硏究는 濟州道 改良牧草地에 있어서 草種組成의 季節 및 年次的 變動狀態를 調査한 結果이며 그 槪要는 다음과 같다. 1. 改良年度別 草種의 變動狀態는 1975年 草地에서 37種이었으나 年數가 經過함에 따라 種數가 增加되어 1980年 草地에서는 130種이었으며 每年 季節에 따르는 種의 數는 夏期에 가장 많았고 春期에는 種의 分布가 가장 적었다. 2. 改良年度別 生育型의 分布變動狀態는 1975年 草地에서 一年生 12種, 多年生 25種, 木本 1種이었으나,年數가 지남에 따라 每年 增加되어 1980年 草地에서는 一年生 42種, 多年生 88種, 木本 5種이었으며, 每年 季節에 따르는 生育型에 있어서는 一年生은 秋期에서, 多年生은 夏期에서 가장 많은 種이 分布되었고 木本雜草는 季節에 變化가 없었다. This study was conducted to investigate the seasonal and annual changes in species on the impoved pastures in Cheju Island. The results are as follows : 1. The annual changes in the number of intruding weed species were obsered. 33 weed species were found in 1975 and increased year after year to 127 species in 1980. The seasonal changes of species by year were also observed. In summer more species ranged than in any other seasons and the number of species growing in spring was found fewer than in other seasons. 2. The distributional changes in annual and perenial plant were brough on. 10 species of annual plant, 23 species of perennial plant, and one species of arbor were found in 1975 and increased respectively year by year to 44 species (annual plant), 86 species(perennial plant) and 5 species (arbor) in 1980. The seasonal changes in ecology by year showed a tendency that more species of annual plant ranged in autumn, and more perennial plants in summer than in any other season. But there is no change in the species of arbor.
Thermal Insulation of Protective Clothing Materials in Extreme Cold Conditions
Zemzem Mohamed,Hallé Stéphane,Vinches Ludwig 한국산업안전보건공단 산업안전보건연구원 2023 Safety and health at work Vol.14 No.1
Background: Thermophysiological comfort in a cold environment is mainly ensured by clothing. However, the thermal performance and protective abilities of textile fabrics may be sensitive to extreme environmental conditions. This article evaluated the thermal insulation properties of three technical textile assemblies and determined the influence of environmental parameters (temperature, humidity, and wind speed) on their insulation capacity. Methods: Thermal insulation capacity and air permeability of the assemblies were determined experimentally. A sweating-guarded hotplate apparatus, commonly called the “skinmodel,” based on International Organization for Standardization (ISO) 11092 standard and simulating the heat transfer from the body surface to the environment through clothing material, was adopted for the thermal resistance measurements. Results: It was found that the assemblies lost about 85% of their thermal insulation with increasing wind speed from 0 to 16 km/h. Under certain conditions, values approaching 1 clo have been measured. On the other hand, the results showed that temperature variation in the range (40C, 30C), as well as humidity ratio changes (5 g/kg, 20 g/kg), had a limited influence on the thermal insulation of the studied assemblies. Conclusion: The present study showed that the most important variable impacting the thermal performance and protective abilities of textile fabrics is the wind speed, a parameter not taken into account by ISO 11092.
New γ -ray transitions observed in Ne19 with implications for the O15(α,γ)Ne19 reaction rate
Hall, M. R.,Bardayan, D. W.,Baugher, T.,Lepailleur, A.,Pain, S. D.,Ratkiewicz, A.,Ahn, S.,Allen, J. M.,Anderson, J. T.,Ayangeakaa, A. D.,Blackmon, J. C.,Burcher, S.,Carpenter, M. P.,Cha, S. M.,Chae, K American Physical Society 2019 Physical Review C Vol.99 No.3
URBANIZATION AND DEPENDENCY REVERSAL IN THE REPUBLIC OF KOREA
Hall, John B. The Institute for Far Eastern Studies Kyungnam Uni 1988 ASIAN PERSPECTIVE Vol.12 No.1
The statistical evidence is too mixed to allow us to make strong statements about dependency reversal. Some indicators Clearly point that dependency reversal is taking place. Other measures could lead us to the opposite conclusion, i.e. that dependency is actually intensifying. Conclusions, then, will be related to the relative weights which we assign to the respective statistical measures, thereby making such judgements of increasing dependency and dependency reversal purely subjective. In order to dispel the uncertainty which might arise consequent to using subjectively assigned weights, let us examine urbanization in South Korea, for the urbanization process lends strong support to the assertion that dependency reversal is indeed taking taking place there.
Key Ne19 States Identified Affecting γ -Ray Emission from F18 in Novae
Hall, M. R.,Bardayan, D. W.,Baugher, T.,Lepailleur, A.,Pain, S. D.,Ratkiewicz, A.,Ahn, S.,Allen, J. M.,Anderson, J. T.,Ayangeakaa, A. D.,Blackmon, J. C.,Burcher, S.,Carpenter, M. P.,Cha, S. M.,Chae, K American Physical Society 2019 Physical Review Letters Vol.122 No.5
The Nonachordal Matrix of Anton Webern's Opus 5, Number Ⅳ
Hall, Jeffrey 이화여자대학교 음악대학 이화음악예술연구회 1995 音樂藝術論壇 Vol.- No.4
The Funf Satze Op. 5 of Anton Webern, while a unique contribution to the literature of the string quarter, also can be viewed as an important point of departure in that composer's journey toward the ideal of maximum economy of expression; a journey which, one might argue, eventually reaches the barrier of the highly compressed utterances of his Op. 11. This quest for economy took the form of a type of self-imposed parsimony wherein (in the case of Op. 9), by his own admission, the composer crossed off the names of the pitch classes already used, and debated with himself the necessity of using them again; (c.f., Anton Webern, "Der Weg zum Neuen Musik").