• 수산해양기술연구
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• 제37권3호
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• pp.232-239
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• 2001

제주도 연안 정치망의 어획성능을 향상시키기 위한 어구구조개량과 조업방식의 생력화에 대한 기초자료를 제공할 목적으로 현재 제주도 연안정치망 어장에 부설하여 조업을 행하고 있는 각망어구와 낙망어구의 어획성능을 비교하기 위해서 두 어장의 3년(1997~1999년)간 어획량을 분석하였는데, 그 결과는 다음과 같다. 1. 1997~1999년까지의 3년간의 총어획량은 각망어구가 18.7톤 낙망어구가 36.5톤으로 낙망구의 어획량이 2배 정도 많았다. 2. 1997~1999년까지의 오징어, 전갱이, 독가시와 방어의 어획량은 전체적으로 각망어구보다 낙망어구의 어척량이 1.8배 정도 많았다. 3. CPUE는 각망어구에서는 전갱이가 10.01k 오징어가 20.5kg, 독가시치가 18.0kg 방어가 2.2kg이며 낙망어구에서는 전갱이가 57.5kg, 오징어가 30.0kg, 독가시치가 25.0kg, 방어가 4.7kg였는데 전반적으로 낙망어구의 CPUE가 높게 나타났다. 4. 유어율은 각망어구에서는 전갱이가 64%, 오징어가 79%, 독가시치가 39% 방어가 14%이고 낙망어구에서는 전갱이가 18%, 오징어가 85%, 독가시치가 40%, 방어가 14%로 전체적으로는 각망어구의 유어율이 높게 나타났으나 여기서의 어획량은 낙망어구가 높게 나타났다.

• Ocean Science Journal
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• 제40권1호
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• pp.11-16
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• 2005

Correction factors based on the catch ratios of egg and larval densities in the southern waters of Korea were estimated for anchovy Engraulis japonica. This was undertaken in order to adjust ichthyoplankton data from different sampling methods, gear types and time. Samples were collected during ichthyop1ankton surveys in Korean waters from 1983 to 1994. The ratios for egg densities obtained in vertical tows with a NORPAC net (ring $\Phi$, 45 cm) compared to those obtained in oblique tows with a KOB net (ring $\Phi$, 80 cm) were 0.86 (CV = 0.65), 1.22 (CV = 0.36), and 0.93 (CV = 0.42) for early, middle, and later developmental stages, respectively. The ratios for larval densities for vertical and oblique tows varied depending on size. For yolk-sac and small larvae (< 4 mm), the ratios were 3.08 (CV = 0.45) and 1.98 (CV = 1.34), while those of 4-6 mm, 6-8 mm, and 8-10 mm larvae were 0.44 (CV = 1.31), 0.45 (CV = 1.70), and 0.56 (CV = 2.50), respectively. Ratios of day/night densities for larvae of 4-10 mm lengths were lower (0.01-0.06) in offshore catches than values obtained in coastal areas (0.440.46) and similar values (0.16-0.04) for vertical and oblique tows. Our results indicated that vertical towing is more efficient for sampling early life stages (from eggs to larvae less than 4 mm long), while oblique towing is more efficient for larvae longer than 4 mm due to depth preferences for each developmental stage (e.g., changes in egg buoyancy and vertical migration oflarvae).

• 대한의용생체공학회:의공학회지
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• 제28권2호
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• pp.218-228
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• 2007

Modem concepts of gait rehabilitation after stroke favor a task-specific repetitive approach. In practice, the required physical effort of the therapists limits the realization of this approach. Therefore, a mechanized gait trainer enabling nonambulatory patients to have the repetitive practice of a gait-like movement without overstraining therapists was constructed. In this study, we developed an active gait training system for patients with gait disorder. This system provides joint movements to patients who cannot carry out an independent gait. It provides a normal stance-swing ratio of 60:40 using an eccentric configuration of two gears. Joint motions of the knee and the ankle were evaluated with using the 3D motion analysis system and compared with the results from the multi-body dynamics simulation. In addition, clinical investigations were also performed for low stroke patients during the 6-week gait training. Results from the dynamics simulation showed that joint movements of the knee and the ankle were affected by the gear size, the step length and the length of the foot plate, except the radius of curvature of the foot guide plate. Also, the 6-week gait training revealed relevant improvements of the gait ability in all low subjects. Functional ambulation category levels of subjects after training were 2 in three patients and 1 in a patient. The developed active gait trainer seems feasible as an adjunctive tool in gait rehabilitation after stroke.

• 수산해양기술연구
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• 제47권3호
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• pp.173-182
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• 2011

The purpose of this paper is to provide useful information for fishermen in the manner of investigation a sinking speed of current type tuna longline gear at the North Pacific Ocean as a new developed tuna longline fishing ground. The sinking depth of mainline in connection with different basket was investigated. The experiments were also performed with different materials such as Supermansen (i.e., PE) and Hitech (i.e., PA) for the mainline to investigate the sinking depth of mainline and hooks. Furthermore, the relation between the sinking depth of hooks and catches are investigated also. The sinking depth of mainline at the first and the last shooting basket shows deeper than that of middle part of a basket due to reduced shortening ratio. The sinking depth of mainline and hook with Hitech material shows more shallow than that of Supermanse material, even the Hitech case was designed to sink deeper than that of Supermanse case. The highest catches arise at the middle part basket as the hook number 7 with around 248m sinking depth. From the results, longline with Hitech material is needed to increase the sinking force for reaching the relevant sinking depth. Moreover, the current strength at the North Pacific Ocean will be considered for further commercial fishing.

• 한국소음진동공학회논문집
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• 제22권4호
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• pp.318-327
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• 2012

The operating sound radiated from a laser printer includes tonal noise components caused by the rotating mechanical parts such as gear, shaft, motor, fan, etc. The negative effects of the tonal noise components need to be considered in the process of developing a sound quality index for the quantitative evaluation of the emotional satisfaction in terms of psycho-acoustics. However, in a previous paper, it was confirmed that the Aures tonality did not have enough correlation with the results of jury evaluation. The sound quality index based on loudness, articulation index, fluctuation strength has a little problem in considering the effects of rotating mechanical parts on the sound quality. In this paper, to solve the tonality evaluation problem, the calculation algorithm of Aures tonality was investigated in detail to find the cause of decreasing the correlation. The new tonality evaluation model was proposed by modifying and optimizing the masking effect, loudness ratio, and shape of weighting curve based on the basic algorithm of Aures tonality, and applied to two kinds of operating sound groups in order to verify the usefulness of proposed model. As a result, it is confirmed that the proposed tonality evaluation model has enough correlation and usefulness for expressing the tonalness in the operating sounds of laser printers. In the following paper, this results will be used to model the sound quality index as the input data by using the classification algorithm.

• 수산해양기술연구
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• 제42권4호
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• pp.195-202
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• 2006

To determine the relative efficiency and mesh selectivity of gill net for the Pacific saury, Cololabis saira, a series of fishing experiments was carried out in the Northwest Pacific Ocean from August 13 to October 13 in 2002, using gill nets of different mesh size(30, 33, 35, 37, 39 and 42mm) constructed from two kinds of twine material(monofilament, twisted multifilament nylon web). The relative efficiency of two material gears was expressed as the ratio obtained by dividing monofilament catch by multifilament catch in number. The master selection curve of each material gear was estimated by applying the extended Kitahara's method. The catch of experimental gears is mostly Pacific saury(98.6%), Cololabis saira. The kinds of bycatch are common squid(0.7%), Pacific mackerel(0.6%), etc. Catch comparisons in the two gears showed that monofilament nylon nets are 1.7 times more efficient. The optimum values in monofilament and multifilament gill net for Pacific saury are 8.28 and 8.23, respectively.

• 기술혁신학회지
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• 제20권3호
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• pp.664-683
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• 2017

본 연구는 공공기술의 이전이 수요기업의 재무적 성과에 미친 영향에 대해 분석하는 것을 목적으로 한다. 대학과 출연(연)이 생산한 공공기술을 시장에서 거래하는 공공기술사업화에 관한 논의는 최종적인 수요자인 기업의 성과목표 달성여부가 그 출발점이 되어야 함에도 불구하고 그동안 기술공급자의 시각에서 정책적 논의가 머물러왔다. 이에 본 연구에서는 연구개발 활동을 수행하고 있는 기업들을 대상으로 공공기술의 이전여부가 기업의 성과에 미친 영향을 위계단계로 분석함으로써 기술이전으로 인한 조직 내 기술역량 변화를 경영요인과 분리하여 측정하고자 하였다. 추정결과 공공기술을 이전한 기업들은 특허의 창출측면에서, 자체연구 그룹은 연구개발 전담인력들의 생산성이 우수한 것으로 나타났다. 이러한 그룹별 특성의 차이가 수익성 측면에서도 일관되게 나타나는 것으로 볼 때, 공공기술의 활용은 기업의 기술수준에 영향을 주고 기업의 재무적 성과에 기여하는 것으로 나타났다. 그러나 연구개발 활동의 무형자산 전환율은 낮은 것으로 나타나, 공공 기술사업화 정책 방향이 기존의 공급자 중심적인 '기술이전 공급확대'에서 벗어나 '수요기업의 연구개발 역량 제고'로 확대전환 되어야 한다는 시사점을 제공한다.

• 수산경영론집
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• 제8권2호
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• pp.1-19
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• 1977

The results analyzed of the actual state of medium size two-boat trawler fishery based on the cost expended in 1975 are as follows: According to the calculation of interest, the total cost of this fishery comes to ￦ 55,353,807, and in this account, the production cost comes to ￦ 49,747,383 (89.9%) and the material cost comes to ￦ 27,027,662(48.8%), the labour cost comes to ￦ 10,381,013 (18.8%) the expenses, ￦12,338,708(22.3%) and commision and interest comes to ￦ 5,606,424 (10.1%). As above the fishery comes is 90% of production cost for the expense of production. The ratio of cost element to the total cost 100 is as follow: Fuel: 23.6%, allocation: 14.3%, fishing gear: 14.1%, boat repair: 13.0%, fish box: 8.5%, ice: 14.1%, commission: 6.9%, food cost: 4.5%, interest: 3.2%, transportation fee: 2.8%, consumption: 2.6%, tax: 2.5%, depreciation: 2.4%, administrative expense: 1.6%. The unit cost of catches to each box, including the interest, cames to ￦ 2,167 and not calculating the interest it comes to ￦ 2,098. The cost production to each kg comes to ￦ 114 including interest, without interest, it comes ￦110. When the production cost comes to 90.6%, it comes to 9.4% of total revenue. The reason which this fishery brings low income is that the boats are almost old and semi-diesel engine is used. So, fuel expense and repaire expenses needs too much. Acconding to above this fishery needs to replace new boat and new engine. And new are for this fishery needs to bring under cultivation in order to bring good income with the new method for this fishery. Specially, this fishery brings low income from July to September because of its rest from labour. And so, the expenses, item, and account of money, and the trust money the cost element are not showed in August.

• 전자공학회논문지SC
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• 제37권5호
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• pp.22-33
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• 2000

고감속비의 관절을 갖는 고하중 조작기를 원격조작 힘반영 제어시스템의 슬레이브 조작기로 사용할 경우에는 마스터 조작기에 비하여 느린 동특성으로 인해 슬레이브 조작기의 제어입력에 포화가 빈번히 발생한다. 슬레이브 조작기가 유연성을 갖도록 설계한 경우에도 제어입력이 포화되면 위치제어루프가 끊어지기 때문에 시스템이 불안정해지고 슬레이브 조작기가 물체에 강하게 접촉하는 경우가 발생하며, 유연한 힘제어 성능을 얻는데 어려움이 있다. 본 논문에서는 고하중 원격조작기에 대해 제어입력의 포화를 고려한 힘반영 유연성 제어기법을 제안한다. 제안하는 힘반영 유연성 제어기법은 제어입력의 포화를 가지는 원격조작기에 대하여 안정한 힘반영 성능과 함께 정밀한 위치제어와 유연성제어 성능을 얻을 수 있다는 장점이 있다. 제안한 제어기법의 안정도를 해석하였고 실험을 통하여 성능을 검증하였다.

• 한국항해항만학회지
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• 제38권6호
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• pp.637-643
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• 2014

본 연구는 해구별 침적폐기물 추정량을 산정하여 해구별 정화관리 우선순위를 분석하기 위한 전제로서 침적폐기물 정화관리지표를 개발하는 것이 연구목적이다. 이러한 연구목적을 달성하기 위한 연구방법으로 전문가 델파이 조사기법을 활용하였다. 전문가 델파이 기법은 적절한 예측방법을 찾을 수 없을 때, 전문가들의 직관을 동원하여 미래를 예측하는 방법으로써 미래변화 뿐만 아니라, 합의를 도출하여 문제를 추정하거나 구성원의 의견을 수집 수렴하는 연구방법이다. 본 연구에서는 27명의 전문가를 섭외하여 이들을 대상으로 총 3회기에 걸친 델파이 조사를 실시하였다. 전문가 델파이 조사결과 최종적으로 선택된 연근해 침적폐기물 정화관리지표는 수거 후 재침적율, 폐어구 유실구역, 해구별 총 폐기물량, 과거 침적폐기물 수거량, 단위면적당 폐기물량 등의 5개 지표로 도출되었다. 본 연구는 패널의 수가 27명으로 한정되어 있는 문제점이 존재하는데, 본 연구를 선행연구로 하여 향후 패널 수를 더욱 확대하여 정밀한 조사가 이루어지기를 바란다.