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종 분포 모형을 이용한 구상나무림의 지속 및 쇠퇴에 관한 연구 - 전라남도 광양시 백운산을 중심으로 -
조선희 ( Seon Hee Cho ),박종영 ( Jong Young Park ),박정호 ( Jeong Ho Park ),이양근 ( Yang Geun Lee ),문이만 ( Lee Man Mun ),강상호 ( Sang Ho Kang ),김광현 ( Gwang Hyun Kim ),윤종국 ( Jong Guk Yun ) 한국산림과학회 2015 한국산림과학회지 Vol.104 No.3
The present study investigated the habitats of Korean fir trees (Abies koreana E. H. Wilson) on Mt. Baekwun (Baekwun-san), determined the current distribution, quantified the contribution of biological and nonbiological environmental factors affecting the distribution, derived actual and potential habitats, presented a plan for the establishment of protected areas, applied RCP 8.5 climate change scenario to analyze the effects of climate change on the future distribution of Korean fir trees, and predicted future potential habitats. According to the results of the study, 3,325 Korean fir trees (DBH >= 2.5 cm) inhabited Mt. Baekwun, and their distribution area was approximately 150 ha. Populations of Korean fir trees were confirmed to exist at an altitude of 900 m above sea level and were distributed up to 1,200 m. Based on potential distribution, areas appropriate for habitation by Korean fir trees were analyzed to be 450 ha, three times the current distribution area, with a focus on Sang Peak (Sang-bong), Eokbul Peak (Eokbul-bong), Ddari Peak (Ddari-bong), and Dosol Peak (Dosol-bong). The forest stands near Sang Peak, the main peak, were evaluated as those with the most appropriate potential for the habitation of Korean fir trees, and populations of the trees tended to prefer the northern slope rather than the southern slope. When climate change scenario RCP 8.5 was applied and future potential distribution was analyzed, the habitats were expected to decrease in area to 20 ha by 2050, with a focus on Sang Peak, and areas appropriate for habitation were predicted not to exist by 2080. Judging from such results, as global warming accelerates, the habitats of Korean fir trees are clearly expected to move from lowlands to highlands.
성음(聲音)과 언어(言語)에 관(關)한 문헌적(文獻的) 고찰(考察)
정희재,오태환,정승기,이형구,Jeong, Hee-Jae,Oh, Tae-Hwan,Jung, Sung-Gi,Rhee, Hyung-Koo 대한한방내과학회 1991 大韓韓方內科學會誌 Vol.12 No.1
The results of the investigation of literature were summerized as follows ; 1. Information of voice, the pharynx, the larynx, the epiglottis, the uvula and the hyoid bone were concerned. 2. In disorders of voice and speech, Lung channel, Stomach channel, Spleen channel, Heart channel, Liver channel, Kidney channel, Im channel (任脈), and Chung channel (衝脈) were concerned. 3. The disorders of voice and speech were showed as follows ; aphonia, ashasia, seong-shi (?嘶), seom-eo(?語) kwang-eo (狂語), jeong-seong (鄭?), dok-eo (獨語) and chak-eo (錯語). 4. The cause of Aphonia and Aphasia were freauently as follows ; abnormal rising of Liver energy (肝邪暴逆), excessive heart fire (心火太過), deficiency of heart-blood (心血太虛), apoplexy of heart spleen (心脾俱中風), consumption of lung fluid caused by heat evil (肺津被灼), deficiency of lung energy (肺氣虛寒) and dificiency of kidney energy (腎虛). 5. The cause of seom-eo, kwang-eo, Jeong-seong were as follows ; the heart of stomach (胃中熱), the heat evil attach the blood chamber (血人血室) and the consumption of healthy energy (精氣奪). 6. In disorders of voice and speech, flaceid tong with aphasia (舌?) and aphasia due to throat disease (喉?) were divided.
Analysis of Brain Waves Before and After Plant Cutting Procedure
Sang Mi Lee,Gyung Mee Gim,Seon Hee Jeong,Sun Jin Jeong,Kyung Sook Han,Young Chea,Yoonah Jang,Sook Lee,Hyun Jin Jang 인간식물환경학회 2018 인간식물환경학회지 Vol.21 No.5
The purpose of this study was to analyze brain waves before and after the plant cutting procedure in 34 adult subjects. After plant cutting procedure, RT(Relative power of theta) decreased and RB(Relative power of beta), RMB(Relative power of mid beta), RHB(Relative power of high beta), RST(Ratio of SMR to theta spectrum), RMT(Ratio of mid beta to theta), and RSMT(Ratio of SMR~mid beta to theta) increased, while RA(Relative power of alpha), RLB(Relative power of low beta), and RG(Relative power of gamma) did not change significantly. The decrease in the RT indicator means that the cutting did not cause anxiety as a stable work rather than a high level task. Therefore, it is considered that the cutting activity can be applied to the subjects with low cognitive level such as children, dementia, and intellectual disabilities and those who should avoid the psychological burden due to the performance of the work. The increases in RB, RMB, and RHB indicators mean a state of mental awakening, inducing concentration similar to meditation. Therefore, the activity of cutting can be applied to people who use psychological energy in daily life, psychological confusion, excessive unnecessary thought, troublesome problems. The increases in the RST, RMT, and RSMT indicators mean an increase in concentration. Therefore, it is possible to apply the cutting activity for the purpose of strengthening the attention and intensifying induction. The results of this study are meaningful that it was confirmed that the cutting activity could induce the brain to be awakened by inducing concentration through conscious activities without giving an intellectual anxiety or psychological burden.
Development of a 25-TW, 60-fs Ti:sapphire laser with frequency-doubled erbium-fiber oscillator
Sung Jae Hee,Kim Seongsu,Jang Jeong Hyun,Lee Seong Ku,Kim Hyung Taek 한국물리학회 2024 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.84 No.1
High-power Ti:sapphire femtosecond laser systems have contributed signifcantly to advancements in various aspects of science; however, the stability of the laser systems limits the application of intense laser pulses. This study presents the development of a stable high-power femtosecond laser system. To this end, 25-TW laser pulses were generated at 10-Hz repetition rate from a chirped-pulse amplifcation Ti:sapphire laser seeded with a frequency-doubled erbium-fber laser. Laser pulses with 54-fs duration and 780-nm central wavelength from the stable fber laser were amplifed to 2.3 J after sufcient temporal stretching. To shorten the temporal duration of the amplifed pulse, the spectral bandwidth was broadened by controlling its spectral amplitude, and the spectral phase error was minimized by precisely controlling the pulse compressor. Finally, the compressed laser pulse had a high energy of 1.6 J, good energy stability of 0.8%, and a short duration of 60 fs, which is close to the seed pulse duration. Thus, the stable high-power femtosecond laser system developed in this study can facilitate various femtosecond laser pulse applications.