• Korean Journal of Ichthyology
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• v.34 no.3
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• pp.218-222
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• 2022

Based on a single specimen (207.0 mm SL) collected from the southern coastal waters of Jejudo Island, morphological characteristics of Antennarius commerson were described as the first reliable record from Korea. The species is characterized by having a globose body covered with small bifurcated spinules, three dorsal spines including a naked illicium and attached pectoral lobe, 13 dorsal fin soft rays, 8 anal fin rays, and 11 pectoral fin rays. We adopted a tentative Korean name previously suggested, "Keun-ssin-being-i", for the species.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.184-185
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• 2022

국제해사기구(IMO)에서는 2017년 미래선박으로서 자율운항선박(MASS)의 개념을 채택한 바 있으며, 실해역 운항을 위한 국제법규 및 규정 검토를 진행하고 있다. 무인선은 악천후시 유인선이 수행하기 힘든 임무를 대체하거나 지원하기 위하여 원격 혹은 자율적으로 운용되는 일종의 소형 자율운항선박을 의미한다. 선박해양플랜트연구소에서는 2011년부터 해양수산부 연구개발사업을 통하여, 무인선 아라곤호 시리즈를 개발하였으며, 아라곤1호, 2호, 3호 등 총 3척을 운용하고 있다. 해당 선박은 길이 8미터, 배수량 약 3톤급의 활주선형으로 원격운항, 경로추종 및 충돌회피 등 자율운항 기능이 적용되어 있다. 한편, 무인선은 공중 드론과 달리 탑재중량이 크고, 항속시간이 길어 해상에서 감시,첩보, 정찰 등에 효용성이 높으며, 최근 한척보다는 여러 척을 운용하는 것이 효과적이어서 무인선 군집(USV Swarm)으로 해상임무를 수행하려는 연구가 다양하게 진행되고 있다. 선박해양플랜트연구소에서는 2019년부터, 기존의 아라곤호 시리즈 무인선들을 활용하여, 무인선 군집 자율운항 시스템 개발을 위한 "인공지능 기반 무인선 상황인식 및 자율운항 기술 개발" 과제를 진행하고 있다. 해상에서 불법선박이 출현시 이를 효과적으로 단속하기 위하여 추적 기동이 필요한데, 본 연구에서는 무인선 3척을 활용하여 불법선박을 추적하는 해상 감시 실해역 시험을 수행하였다. 본 논문에서는 무인선 군집 자율운항 시스템에 대하여 소개하고, 무인선 군집을 활용한 불법선 추적에 관한 실해역 시험결과에 대해 소개한다.

• Korean journal of applied entomology
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• v.39 no.3
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• pp.153-156
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• 2000

Spatial activities of Liriomyza trifolii (Burgess) were investigated weekly using yellow sticky trap which were placed at three different height and monitored during four time periods. Yellow sticky trap placed at plant height caught significantly more L. trifolii (Burgess) than did traps placed at 30 and 60cm above plant height. Diel activities of L. trifolii (Burgess) were monitored with yellow sticky traps at 1- and 2-h intervals during three time periods. Leafminer flight activity in May, July and October peaked from 1400 to 1800 hours, 0800 hours and from 1200 to 1400 hours, respectively. 2nd peak of flight activity only occurred in May. Attraction of L. trifolii (Burgess) for yellow sticky traps was affected by temperature as well as solar intensity. Male of L. trifolii (Burgess) appeared more responsive to yellow sticky traps than female regardless of trap height or time of day.

• Journal of Korea Technology Innovation Society
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• v.17 no.1
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• pp.68-94
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• 2014

SMEs in Korea are suffering from severe manpower shortage due to poor incentive system and employees' frequent change of jobs. So far, the government has made continuous efforts to solve these problems, but SMEs still have the same problem. It is critical for SMEs to maintain core employees for long term who can directly contribute to the business performance. However, Korean manpower policies for SMEs has mainly focused on hiring new recruits and attracting experienced high caliber employees to SMEs. Relatively, policies for attracting in-house employees to work for longer term were insufficient. This paper focuses on providing strategic policy options to make core employees stay in the company for longer term. For this, it identifies the concept and features of core employees and reviews the necessity of introducing the Mutual Aid Project. Also, it suggests the way to enhance the effectiveness of policy by analyzing current Mutual Aid Fund programs in Korea.

• KDI Journal of Economic Policy
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• v.34 no.1
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• pp.29-52
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• 2012

During the global financial turmoil in 2007-2008, deviation from the covered interest parity (CIP) between the Korean won and US dollar through the foreign exchange swap has escalated in its magnitude beyond 1,000bp in November 2008, and it still persists around 100bp level. In this paper, we examine a newly developed margin based asset pricing model using Kalman filter approach and show that the escalation of the CIP deviation is found to be significantly related to the global dollar funding illiquidity and country-specific funding conditions. Furthermore, we find evidence that the poor funding conditions (or higher margins) are driven by the general money market illiquidity and may lead to higher funding illiquidity, which suggests the reinforcing effects of the liquidity spiral. We also show that the supply of dollar liquidity and improved funding conditions help alleviate the deviations from the parity, however the persistent anomaly is found to be related to the high level of volatility in the FX swap market.

• Journal of Environmental Policy
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• v.8 no.2
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• pp.145-164
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• 2009

Environmental problems, such as the depletion of natural resources, global warming, and the destruction of ecological systems, are among the most serious problems facing the planet. Since the early 1990's, many OECD countries have undertaken green tax reforms by introducing new environmental taxes to protect the environment. Environmental taxes have been used as an instrument of environmental policy more than direct regulation because economic instruments have a comparative advantage over direct regulation in terms of cost effectiveness and pollution abatement incentives. However, one important reason why green tax reforms have not progressed is due to fears regarding the negative effect of environmental taxes on international competitiveness in the industry and trade sectors. The main purpose of this paper is to analyze the effects of environmental taxes on industry and trade by using a theoretical model to compare the effects of environmental taxes on pollution-intensive and energy-saving industries.

• Korean Journal of Plant Tissue Culture
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• v.21 no.6
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• pp.357-362
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• 1994

Chitinases and $\beta$-1,3-glucanases are believed to be important in defending plane against pathogens. Here, we investigated the expression of chitinase(s) in Arabidopsis thaliana cell suspension culture system in response to ethephon (2-chloroethyl phosphonic acid) which produces ethylene or a microbial elicitor, a bacterial pectin-degrading enzyme, $\beta$-1, 4-endopolygalactronic acid Iyase (PGA Iyase), treatment. Chitinase activity was measured either by radio chemical assay using $^3$H-labeled regenerated chitin as substrate or western blot analysis using antibody raised against tobacro chitinase(S). With 1 mg/mL of ethephon or 100 m units/mL of elicitor treatment, maximum levels of activity were reached after 48h. We also investigated distribution of chitinase activity in seedlings, leaves, and root of A. thaliana and found that root have the highest chitinase activity.

• Transactions of the KSME C: Technology and Education
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• v.3 no.1
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• pp.71-78
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• 2015

Although there are differences in the classification of category adopted by each country, small UAS is usually classified as the one less than 25 kg. UAS has been mainly used for military and public purposes, but in recent years, it has spread to the private sector for hobby, media, and so on. Especially, considering the nature of the operating region and applications, it is necessary to improve operating time, noise and vibration in small UAS to ensure the same level of safety with a manned aircraft. This is because the drone can pose health and safety hazard through collision with manned aircraft or crashing into the ground. In this paper, we investigated operational regulations in the United States and European countries. Based on the investigation, a domestic system development plan for small UAS operation is under development.

• Korean Journal of Plant Resources
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• v.12 no.3
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• pp.204-208
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• 1999

We carried out this study to confirm the possibility of C. wilfordii cultivation using crop as a substitute for stake or net, and tested sit support crops, i.e., soybean, peanut, Perilla frutescens var. acuta Kudo, Job's tears, sorghum, and corn compared with net support. Effects of support crops on growth and root yield of C. wilfordii were as follows. Attracting efficiency of vine showed 94∼100% among crops. The number of branches per plant was 1 or 2 more in p. frutescens var. acuta Kudo, Job's tears, and sorghum support than in net support. Fresh root yield per 10a was 919kg in net support, while it was 717kg in P. frutescens var. acute Kudo, 656kg in Job' tears, and 652kg in sorghum support. However, the problem of decreased yield in these support crops could be overcome by cost saving of staking installation and by harvesting support crops. Therefore, C. wilfordii cultivation using P. frutescens var. acute Kudo, Job's tears, and sorghum as support crops showed most effective in labor and cost saving.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2002.02a
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• pp.42-47
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• 2002

가. 작업별 시험결과 1) 마늘쪽 분리·선별작업 o 마늘쪽 분리기는 통마늘을 1 또는 2∼3쪽으로 분리하여 1차 선별하고, 마늘쪽 선별기는 분리된 마늘을 3단계로 선별되며 작업성능은 시간당 60접 이상을 분리 및 선별할 수 있다. o 개발된 마늘쪽 분리기와 선별기는 소형 경량이며 취급조작이 편리한 기종하고 작업성능이 높고 손상률이 적어 '01년도에 60대가 농가 보급되었으며 '02년도에는 확대 보급될 전망이다. 2) 파종작업 o 작업성능은 경운기용 파종기 2시간/10a, 승용관리기용 직립파종기는 1시간/10a으로 능률적이었으며 작업정도와 생육상태가 양호하였다. o 지역별 파종작업 체계 -난지형 마늘 파종은 직립파종을 하며 제주, 남해 등은 마늘을 파종한 후 10-11월 줄기가 자랐을 때 무공비닐을 피복하고 줄기를 유인하며, 무안은 유공비닐을 피복하고 구멍에 마늘의 1/2 또는 2/3만 묻히도록 파종하며 별도의 줄기유인 작업은 하지 않는다. 의성지역의 한지형 마늘은 트랙터로 쇄토정지후 보행관리기로 골을 내고 인력으로 마늘을 놓으면 관리기가 다음 골을 내면서 복토하는 체계이다. 3) 마늘 수확작업 -마늘 수확기는 난지형 마늘 수확에는 효과가 적으나, 한지형과 같이 깊게 파종하여 인력으로 뽑기 어려운 재배지역에서는 필요한 기종이며, 토양수분이 많으면 굴취된 마늘과 혼이 진동판에 걸려 작업상태가 불량하므로 마늘과 흙의 이송이 원활토록 진동판 형상 및 적정 진폭 구명이 요구됨 4) 마늘줄기 절단작업 -난지형 마늘은 포장에서 건조후 단기간(1-2주)내에 줄기절단을 해야하므로 기계환가 시급하나 한지형 마늘은 아직도 대부분 줄기를 자르지 않고 묶어서 판매하고 있어 기계화의 시급도는 떨어짐 5) 마늘 선별작업 -마늘선별기는 작업성능이 높고 5등급으로 균일 선별되었으며 손상도 없었으나, 기계가 크고 무거워 이동이 곤란하고 가격이 비싸므로 선별등급을 3∼4단계로 줄이고 소형 농가보급형으로 개량제작이 요구됨. 나. 마늘재배 일관기계화에 의한 노동투하시간과 비용 -종자준비부터 통마늘선별까지의 일관기계화로 투입된 주요작업의 노력은 75∼76%가 절감되고, 재배규모 3ha기준시 비용은 44-53%절감되었음.