Survey of Cultivation and Status of Gerbera Smart Farms

Oh Keun Kwon,Jae Ah Jung,Myung Suk Ahn,Hyun Young Song,Manjulatha Mekapogu,Dan Hye Kim,Doo Jong Ha 한국화훼학회 2021 화훼연구 Vol.29 No.4

본 연구는 거베라 주산지인 경북과 경남 지역의 농가 재배 및 스마트팜 현황을 조사하고 분석하고자 수행하였다. 조사방법은 2020년 81 농가를 대상으로 대면 설문조사를 실시하였다. 거베라 경영주 연령은 50∼60대가 71.6%로 가장 많았고, 30∼ 40대가 16%, 70세 이상이 9.9%, 30세 이하는 2.5% 순이었다. 거베라 재배 경력은 5년 이하가 37%였으며, 6∼10년 25.9%, 11∼20년 29.6%, 21년 이상 농가가 7.4%였다. 재배 면적은 0.3 ∼0.6ha가 61.7%로 가장 많았고, 0.3ha 미만이 30.9%, 0.6ha 이상이 7.4%였으며, 전체 평균재배 면적은 0.37ha였다. 거베라 재배 농가당 평균 인력은 자가 노동력 2.1명, 고용 노동력 0.8명 이었다. 재배 방식에서 토경 88.9%, 양액재배 농가는 11.1%였다. 국산품종을 전체 또는 일부라도 재배하고 있는 농가는 61.7%였고 외국산 거베라 품종만 재배하고 있는 농가는 38.3% 였다. 거베라 병해충 발생조사에서 병 발생이 많았다고 응답한 농가는 91.4%였으며, 충 발생이 많았다고 응답한 농가는 98.8% 였다. 스마트팜 시스템을 설치한 농가는 12.3%였으며, 설치하지 않은 농가에서 향후 설치할 의향이 있다고 응답한 농가는 76.9% 였다. 향후 경영계획을 묻는 질문에서 현상유지 80.2%, 축소 8.6%, 경영확대 11.1%였으며, 경영 확대를 대답한 농가는 경북 지역이 8농가로 경남지역 1농가 보다 많았다. This study was conducted to investigate and analyze gerbera cultivation and the status of smart farms in Korea. The survey was conducted in person for 81 farms, in 2020. About 71.6% managers of the gerbera farms were in their 50s and 60s, 16% in their 30s and 40s, 9.9% were over 70, and 2.5% under 30. About 37% of the farmers have cultivation experience of less than five years; 25.9%, 6–10 years; 29.6%, 11–20 years; and 7.4%, over 21 years. Around 61.7% of the area under gerbera cultivation was 0.3–0.6 ha, 30.9% was less than 0.3 ha, and 7.4% was over 0.6 ha; and the average area under cultivation was 0.37 ha. The average family labor of the gerbera farms was 2.1 people and the employed labor was 0.8 people. The cultivation methods included about 88.9% soil and 11.1% nutrient cultivation farms. However, 61.7% of the farmers cultivated all or part of the domestic gerbera varieties, whereas 38.3% only cultivated foreign varieties. In the pest survey, around 91.4% of the farm managers responded to have observed different diseases, and around 98.8% farms exhibited various pests. The smart farm system has been installed by 12.3% of the farming households. However, 76.9% of farming households with no prior smart farms are planning to install them in the future. Future plans include the status quo of 80.2%, reduction in total area by 8.6% and expansion in total area by 11.1%, and around eight farms in Gyeongbuk and one farm in Gyeongnam area are planning to expand their management.

The Association Between Long Working Hours and Infertility

Ahn Joonho,Lee Sang Ha,Park Min Young,Oh Soo Hyun,Lee Wanhyung 한국산업안전보건공단 산업안전보건연구원 2021 Safety and health at work Vol.12 No.4

Background: This study aimed to investigate whether working long hours was related to infertility among female Korean workers, while taking age into consideration. Methods: We used data from the 2018 National Survey on Fertility and Family Health and Welfare in Korea that is a cross-sectional, nationally representative, and population-based survey. Infertility was defined as women who were not pregnant after regular unprotected intercourse for a year. Working long hours was classified as ≥52 hours, and subgroups as per age were classified on the basis of being younger or older than 40 years of age. Differences in infertility risk between the long working hour group and none were estimated in crude and fully adjusted logistic regression models with age-group stratification. Results: Of 5,909 Korean female workers, the crude and adjusted odds ratios (95% confidence intervals) of infertility for working long hours were 1.295 (0.948-1.737) and 1.303 (0.921-1.809), respectively. In the subgroup of patients below 40 years of age, the crude and adjusted odds ratios (95% confidence interval) were 1.957 (1.216-3.039) and 1.921 (1.144-3.120), whereas those aged 40 years or older had 0.994 (0.647-1.471) and 0.939 (0.560-1.501), respectively. The weighted prevalence of infertility increased as weekly working hours increased only for the younger than 40-year subgroup. Conclusions: Infertility is associated with working long hours, especially in young-aged workers. Thus, the working schedule must be structured to better suit young female workers.

Mg 其他 複合材料의 强化材 量 및 分布에 따른 機械的性質特性

안선규,하홍수,김영직,임병수 成均館大學校 科學技術硏究所 1997 論文集 Vol.48 No.1

The effect of different SiC particle size and weight fraction in Mg/SiC particle MMC on the mechanical properties has been investigated. In this study, different particle sizes of 7㎛, 20㎛ and 50㎛ were prepared with various weight fraction of 10wt.%, 20wt.% and 30wt.% for sample preparation. By tension tests, the properties of ultimate tensile stress, yield stress and % elongation were observed and by tension-tension fatigue tests, whose procedures are standardized in ASTM standard 647E-93, the ΔK vs, da/dN curves were also obtained. Finally, the crack propagation paths were observed by optical microscope.

치골결합의 외상성 분리에 대한 치료

하상호,유재원,이상홍,신동민,표영배,안병관 朝鮮大學校 附設 醫學硏究所 1991 The Medical Journal of Chosun University Vol.16 No.2

The separation of symphysis pubis as a result of injury is uncommon, but it is increasing in number in parallel with today's speedy development of car industry. Most cases of the separation of symphysis pubis are amenable to closed treatments, but unstble separation where the reduction is difficult to maintain may require open techniques. Authors analyzed 27 cases of traumatic separation of symphysis pubis with 16 months follow-up on an average, who had been treated at the Orthopaedic Department, Chosun University Hospital. The results obtained were as follows; 1. The most common cause was traffic accident (81.5%). 2. Among of 27 patients, instability on the posterior stabilizer of pelvic bone was noticed in 18 patients. 3. Fifteen patients were treated with closed methods(bed rest, hammock, traction)and twelves were treated by the open reduction and internal fixation. 4. Internal fixations were carried out with plate and screw(5 cases), screw and wiring(4 cases), and wiring (3 cases). 5. The separation of symphysis pubis with minimal disruption of posterior stabilizer were treated by closed treatment or internal fixation of the separation of symphysis pubis diastasis alone, and its result was good or excellent. 6. We think that the symphysis pubis diastasis with severe disruption of posterior stabilizer should be fixed anteriorly and posteriorly both.

편측 상하지 마비를 동반한 두개강내 지주막 낭종1례

안상윤,김영태,이하백,문수지 한국의학사 1989 診斷과治療 Vol.9 No.8

불안정성 흉요추체 방출형 골절 환자에서 기구를 이용한 고정술의 결과

안병조,이정청,김재은,김형일,김철진,최하영 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.9

Fifty six patients with unstable thoracolumbar bursting fractures were treated using variable internal fixation devices such as the Kaneda Anterior Fixation System(Kaneda device), the Z-Plate-ATL^(TM) Anterior Fixation System(Z-Plate ATL^(TM)device), the Harrington device. Cotrel-Dudousset(CD) or Compact Cotrel Dubousset(CCD) device of Steffee Transpedicular System with or without decompression. Suchy internal fixation devices were grouped into anterior and posterior internal fixation devices and compared with each other in the aspect of the degree of neurological improvement, the changes of the vertebral height and the kyphotic angle, the duration of admission, and postoperative complications. In conclusion, the anterior internal fixation device appears to be of more benefit in the management of patients with unstable thoracolumbar bursting fracture

當歸類가 혈관신생에 미치는 영향에 대한 비교연구

吳霞植,金亨煥,安德均,崔湖榮 대한본초학회 2001 大韓本草學會誌 Vol.16 No.2

A rat sponge implant model was used to examine the angiogenic effect of water extract of Angelica Gigantis Radix (EAG). Angelica Sinensis Radix (EAS) and Angelica Radix (EAA). It was based on subcutaneous implantation of sterile polyester sponges in the Sprague Dawley (SD) rat and we have characterized a dye method that incorporates 5% carmine red in 10% gelatin. Vascularity index (V.I.) expressed as ㎍ dye/㎎ dry tissue. The result of study is as follows; 1. Subcutaneous implantation of sterile polyester sponges in SD rats enhanced the angiogenesis over 14 days, as determined by measurements of relative angiogenic effects by a vascularity index. 2. Daily oral administration (100 ㎎/㎏ for 14 days) of EAS and EAA produced weak effect on sponge-induced angiogenesis but EAG caused intense neovasculalization. 3. PBS (50 μ1) and EAG (100 ㎎/㎏) - induced angiogenesis represents a special form of angiogenesis. 4. The vasoconstrictor peptidem, angiotensin Ⅱ(AⅡ), in daily doses of 100 nmol, caused an intense neovascularization and coadministration of the AⅡ (100 nmol) and EAG (100 ㎎/㎏), AⅡ and EAS (100 ㎎/㎏) and AⅡ and EAA (100 ㎎/㎏) produced angiogenic effect. Especially, AⅡ (100 nmol) and EAG (100 ㎎/㎏) caused very potent angiogenesis. We have shown that oral administration of EAG (100 ㎎/㎏) induced angiogenesis. Thus the sponge model offers a new means for continuous and reproducible studies on the controlling mechanisms of angiogenesis.

개 대뇌겉질에서 Platelet-Derived Growth Factor α-Receptor의 출생 후 발달에 관한 면역조직화학적 연구

윤영,안병수,김인정,양경철,박선홍,김기훈,박도영,김장만,문정석,장인엽,조하영 조선대학교 부설 의학연구소 2002 The Medical Journal of Chosun University Vol.27 No.1

Background and Objectives : The localization of platelet-derived growth factor-α receptor (PDGF-α R) was commonly restricted to oligodendrocyte progenitors during late embryonic and postnatal development. However, several studies recently demonstrated that mature neurons could also synthesize PDGF-α, Materials and Methods : In the present study, to analyze the distributional pattern of PDGF-αR during postnatal development of the canine cerebral cortex, we used immunohistochemistry on sections of canine brain tissue. Results : We found that neurons of various regions of cerebral cortex exhibited the immunoreactivity to PDGF-αR as early as postnatal day 0, and slightly decreased after postnatal day 14. Whereas neuronal PDGF-αR were maintained at all ages, the oligodendroglia-like expression of PDGF-αR could not be confirmed. Conclusion : The localization of PDGF-αR in immature and mature neurons supports the several roles of PDGF during development, protection and survival of neurons.

One-Chip uP에 의한 CO₂가스메탈 아크용접기의 디지털 제어기 설계에 관한 연구

최규하,채영민,송성학,우동학,한광수,안기은 건국대학교 1997 學術誌 Vol.41 No.2

With the development of semiconductor devices, adaptation of microcontroller prevails in industrial area. But in arc welding industry, there has not been much progress in adoption microcontroller technology. Therefore, this paper shows the application of digital control technology to welding machine. This paper presents the design of microcontroller that is appropriate for three phase CO2 gas metal arc welding machine. By using microcontroller in CO2 gas metal arc welding machine, the overact cost can be reduced compared to analog type one. Also TMS370C850 microprocessor is used as overall microcontroller for the arc welding machine.

귓바퀴에 발생한 Spitz 모반 1예

고나영,박준하,안효현,계영철,김수남 대한피부과학회 2006 大韓皮膚科學會誌 Vol.44 No.4