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Longitudinal Perspectives of Residential Mobility in Urban Area
In - Soo Lee(李仁秀),Sea Baiek Lee(李時伯) 한국인구학회 1991 한국인구학 Vol.14 No.2
本 硏究는 大都市의 人口移動率의 長期的 趨勢를 分析하기 위하여 試圖되었다. 本 硏究에서는 멕시코의 中小都市인 오하카(Oaxaca)에서 區域別로 抽出된 633家口를 對象으로, 그들의 居住地 移動狀況 및 이에 影響을 미치는 人口ㆍ社會學的 要因에 관한 設問을 實施하였다. 硏究結果, 家族의 居住地 移動率은 結婚後 5年 이내가 年間 23.23 퍼센트로서 가장 높았는데, 이것은 結婚初期에 出産과 관련한 住居空間 要求의 급격한 增加가 主된 原因인 것으로 解釋되었다. 또한 年代別로는 1960年代에 특히 많은 住居地 移動이 있었는데, 이는 이 時期의 汎 世界的인 아기풍년(Baby Boom)에 따른 급격한 子女數의 增加와 관련된 居住空間의 需要擴大로 因한 現象으로 解釋되었다.
Secretion amount of nectar a few medical herb plants in Korea
Ha sik-Sim,Man-young Lee,In-pyo Hong,Soon-ok Woo,Yong-soo Choi,Gyu-ho Byuon,Weon-ki Baiek,Young-ju Oh,Myeong-lyeol Lee 한국응용곤충학회 2013 한국응용곤충학회 학술대회논문집 Vol.2013 No.10
About 70% of total honey products produced by Korean bee keepers was acacia honey. The remaining 30% was chestnut honey, jujube honey, snowbell honey, and another honey. False acacia, went down in payability since the middle 2000s because of simultaneous blooming etiolation chlorsis decreases productivity after aging. Therefore, substitution honey plants were necessary. This study estimated nectar secretion amount of each flower and productivity per ha at 14 medical herbs. Each flower, Codonopsis lanceloata, estimated a majority nectar secretion amount at 176.08 ul for each of the 14 medical herbs. Astragalus membranaceus estimated majority nectar secretion amount at 1273.3 L per ha for each of the 14 medical herbs. Medical herbs were hypothesized with valuable honey plants.
Secretion characteristics of amount nectar Zizy jujube var. inermis in Korea
Ha sik-Sim,Man-young Lee,In-pyo Hong,Soon-ok Woo,Yong-soo Choi,Gyu-ho Byuon,Weon-ki Baiek,Young-ju Oh,Myeong-lyeol Lee 한국응용곤충학회 2013 한국응용곤충학회 학술대회논문집 Vol.2013 No.10
Jujube trees, herbal medicine material, produce not only their fruit but also jujube honey for bee and human’ food sources. Although jujube is an important honey plant after acacia bloom, the research was done with 15-year-old jujube trees grown in ChungDo-Gun, which there was no information on jujube floral nectar. According to the research, jujube nectar secretion mostly happens during dawn and morning for two days. The average number of inflorescence per tree is 638.1 according to the research. And also, the average number of flowers per inflorescence is 64.4. The amount of nectar secretion is 11.6 ul on average per flower, and hypothesized nectar secretion from 15-year-old tree per tree is 476.682 ul. Also,a jujube tree has 545.5ul hypothesized nectar secretion per ha by the research.