• 수산해양기술연구
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• 제41권3호
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• pp.227-233
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• 2005

In order to estimate the effective horse power(EHP) in towing net of a bottom trawl ship, the ship's resistance was calculated by using a series data of Yamagata and Wigley formula. Also the effective horse power for a ship(EHPs) was estimated versus the ship speed in sailing and the propulsive efficiency was calculated with the brake horse power and the effective horse power. Then the effective horse power for a ship and a trawl net were estimated in the application of the propulsive efficiency in towing net. The total effective horse power($EHP_T$) was average 187.6kW and the effective horse power for a 1.awl net($EHP_n$) was average 176.7kW at a smooth sea state in towing net. The ratio of $EHP_n$ to $EHP_T$ was about 94.0% and the value was higher slightly than was already informed at a smooth sea state. The power for keeping up a townet speed was required more about 20% of a maximum continuous power at a rather rough sea state than a smooth sea state. In the future, if the residual resistance is considered with a sea state, $EHP_n$ will be estimated more correctly Also the data of EHP estimated by this method will be used as the basic data to design a trawl net.

• 한국농공학회지
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• 제18권4호
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• pp.4259-4264
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• 1976

This paper, is about the test on the operating performance of diesel engine by using of soybean oil which farmers could supply in their farm yard. The diesel engine used is a swirl-chamber type, four stroke cycle with single cylinder, air cooling and its rated horse power is 2 PS per 1300 rpm. Several results obtained are as follows; 1. The starting performance of diesel engine with soybean oil is almost the same as that with light oil. 2. The variation of engine speed according to various engine load is small when soybean oil is used compared with light oil. It is considered that soybean oil is desirable for the purpose of industerial power machine fuel. 3. The specific fuel consumption increases approximately 10 percent high in the condition of rated horse power and maximum horse power and shows less or same during the load test in low velocity, when soybean oil is used 4. Though the brake thermal efficiency in the condition of rated horse power and maximum horse power is inclined to decrease when soybean oil is used compared during the load test in low velocityt shows good inclination.

• The Journal of the Acoustical Society of Korea
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• 제25권4E호
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• pp.159-165
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• 2006

Human, horse and rat bloods in a cylindrical chamber where flow was controlled by a stirring magnet were used for studying red blood cell aggregation. Ultrasound backscattered powers from blood were obtained from the backscattered signals measured by a 5 MHz focused transducer in a pulse-echo setup. The experimental results showed the differences in red blood cell (RBC) aggregation tendency among the three mammalian species with an order of horse > human > rat. The ultrasound backscattered power decreased with stirring speed in human and horse blood, but no variations were observed in rat blood. Sudden flow stoppage led to the slow increase of the backscattered power for human and horse blood. There was no self-aggregation tendency in rat blood. The enveloped echo images showed the spatial and temporal variations of RBC aggregations in the cylindrical chamber. These observations from the different mammalian species may give a better understanding of the mechanism of RBC aggregation.

• 수산해양기술연구
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• 제11권1호
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• pp.21-25
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• 1975

Authors studied the propulsion efficiency of G. T. 280 to 300 class tuna longliners used in Korea. At first authors calculated the ratios and factors of the ship by use of principal dimensions. In cordance with this ratios and factors authors, examined the effective horse power, propulsion ficiency and brake horse power, and following results are obtained. (1) EHP is slightly increased according to the increasing of Froude number and speed. (2) Value of propulsion coefficient is obtained in the range of 51-54% at the cruising speed an its average is 52% in 6-13 knot of the speed. (3) EHP and BHP are increased according to the increasing of prismatic coefficient at the same speed.

• 한국군사과학기술학회지
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• 제13권3호
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• pp.343-348
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• 2010

Recently, unmanned electric vehicles are increasingly interested among all of the world since they can provide low exhaust gas, high efficiency and high mobility. To exploit their silent maneuver and high mobility, unmanned electric vehicles have been developed since early 1980's for military. However, it is not easy to design and control a power system satisfying operating duration and mobility performance requirements based on various mission profiles for military use under the conditions of limited space and weight. Moreover it is also necessary to prevent over-charge, over-discharge and voltage unbalance between cells of battery to secure high voltage battery which is serially connected with muti-cells. In this paper, we presents power control and optimal management method for the dog-horse robot which adopts a electric power system and suggests a guide-line to manage and control to secure high voltage battery.

• 직업교육연구
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• 제33권3호
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• pp.145-167
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• 2014

이 연구의 목적은 승마산업의 전반적인 효율적 확산을 도모하고 승마지도사 양성을 위한 교육과정 개발의 기초자료를 마련하기 위하여 승마지도사에 대한 직무를 체계적으로 분석되었다. 특히 직무분석의 한 방법인 DACUM 법과 관련 전문가들의 검증을 통하여 승마지도사 직무의 모형(DACUM chart)을 개발하였다. 그 결과 승마지도사에 대한 8개의 임무와 100개의 작업이 나왔으며, 최종 전문가 내용타당도 검토 및 전문가 자문 검토 결과 후 총 7개의 직무영역과 82개의 수행작업으로 정리되었다. 또한, 전문가들의 의견에 따라, 승마지도사란 "승마장이나 승마 시설에서 승마 교육대상자에게 승마 지도를 하고 말, 승마장 시설 장비 그리고 인력을 관리 운영하는 자"로 정의되었다. 이러한 결과는 현재 운영되고 있는 승마지도사 양성 교육훈련 과정에 다양한 시사점을 제공해 준다. 특히 승마지도사 관련 시험 출제 대상 과목 및 교육훈련 과정이 3개 과목(마학, 마술학, 말 보건관리)으로 편성되어 있으나, 직무분석 결과 '승마장 운영 및 관리'와 '승마교육론'이 추가로 수정 및 보완 필요가 있음을 알 수 있었다. 또한 직무분석의 작업과 임무는 작업 프로파일 및 작업명세서로 활용될 수 있는 자료로서 활용되며, 이러한 자료는 훈련 과정과 출제 기준의 자료로 활용할 수 있을 것이다. 이 연구를 통해 추후 승마지도사 자격 종목에 대한 재 설계 및 자격 내 직무의 내용과 역할에 따라 수준을 구분하고, 이를 자격으로 연결할 수 있는 연구가 필요하다. 또한 승마지도사 자격의 활용성을 제고할 수 있는 방안과 함께 관련 연구가 요구된다.

• 대순사상과 동아시아종교
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• 제3권1호
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• pp.109-128
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• 2023

Recent research shows that since the early 2000s, the Chinese Communist Party has increasingly used various cultural heritage sites, including Buddhist sites, as soft power agents. Furthermore, in the context of the Belt and Road Initiative, launched by the People's Republic of China, Buddhist temples, representatives, and practices have been harnessed to play a role in the state's agenda. In this context, White Horse Temple, as a feature of cultural tourism in Henan Province, is facing new opportunities and challenges. The article examines the material particularities of reconstructing the temple in light of this trajectory, building on materials retrieved at the site, and online representations of the temple. The author explores how the temple's unique spatiality and characteristics stress the use of soft power which harnesses online and offline cultural and popular trends for state agenda.

• 한국운동역학회지
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• 제25권3호
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• pp.353-361
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• 2015

Objective : The aim of this study was to develop the non-powered horse riding device and was to evaluate the elaborate its applicability throughout static structural and transient structural analysis of the outdoor core strength exercise equipment. Method : Fifteen college students (mass: $69.55{\pm}13.38kg$, height: $1.69{\pm}5.61m$, age: $21.42{\pm}1.83yrs$) rode the powered horse riding device and 14 college students (mass: $71.12{\pm}9.74kg$, height: $1.73{\pm}3.31m$, age: $22.50{\pm}1.47yrs$) rode the non-powered horse riding device for the comparison. All motion capture data was collected at 100 Hz using six infrared cameras and the muscular activities were collected using a Delsys Trigno wireless system. The peak forward/backward lean angle, range of motion anter/posterior and vertical COM(Center of mass) movement of trunk and pelvis segment, and muscle activities of six muscles were compared between the two devices by using independent t-test (p<.05). Results : Several kinematic variables (peak forward-backward lean angle and vertical COM movement of trunk and pelvis segment, range of motion of trunk) significantly different between non-powered and powered horse riding device. The muscle activities of Rectus abdominis and External oblique of abdomen on the non-powered horse riding device were significantly greater than those of the powered device. Conclusion : It was concluded that non-power horse riding device could give the effect of core strength exercise as well as the body motion which can simulate the powered horse riding device.

• 생명과학회지
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• 제17권10호
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• pp.1441-1446
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• 2007

본 연구는 서로 다른 상염색체에 위치하고 있는 초위성체유전 표지를 활용하여 제주마 집단의 타 품종과의 차별적 유전특성분석과 제주마 집단에서 활용할 수 있는 효율적인 개체 식별 시스템 설정을 위해 수행되었다. 공시재료로서는 5품종에서 총 191두가 사용되었으며 13종의 좌위에 대한 개체별 유전자형을 분석하였다. 이들 13종에서 출현된 총 대립 유전자수는 제주마의 경우 155종이 나타났다. 한국 제주마 집단에서 나타난 평균 이형접합도는 0.317-0.902였으며 marker 다형성 정보량은 0.498-0.799로 나타났다. 제주마 집단에서 나타난 대립 유전자 발현 특성은 다른 외래 품종 집단과 매우 상이한 결과를 나타냈다. ATH4 좌위의 경우 제주마 집단에서는 5종의 대립 유전자가 고른 분포를 나타낸 반면 QUA종의 경우와 THO종집단에서 특정 좌위의 극단적 발현 빈도를 나타냈다. 품종특이성을 나타내는 분자표지의 대립유전자 발현양상이 확인되었으며 이러한 품종특이성 발현 분자표지는 집단 내 개체에 대한 품종식별 유전자표지로 활용이 가능한 것으로 나타났다. 9종의 초위성체 유전 표지를 활용할 경우 누적 개체 식별력은 99.9%를 나타냈으며 두 마리의 서로 다른 개체가 서로 같은 유전자형을 가질 짝확률은 $0.60\;{\times}\;10^{10}$으로 추정되었다. 따라서 9종의 선정된 유전표지는 제주마 품종 집단에서 적정 신뢰도를 제공할 수 있는 개체 식별 시스템을 설정할 수 있을 것으로 생각된다.

• 한국운동역학회지
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• 제13권3호
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• pp.81-98
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• 2003

The purpose of this study is to closely examine kinematic characteristics by jump phase of Li Xiaopeng motion in horse vaulting and provide the training data. In doing so, as a result of analyzing kinematic variables through 3-dimensional cinematographic using the high-speed video camera to Li Xiaopeng motion first performed at the men's vault competition at the 14th Busan Asian Games, the following conclusion was obtained. 1. It was indicated that at the post-flight, the increase of flight time and height and twisting rotational velocity has a decisive effect on the increase of twist displacement. And Li Xiaopeng motion showed longer flight time and higher flight height than Ropez motion with the same twist displacement of entire movement. Also the rotational displacement of the trunk at peak of COG was much short of $360^{\circ}$(one rotation) but twist displacement showed $606^{\circ}$. Likewise, Li Xiaopeng motion was indicated to concentrate on twist movement in the early flight. 2. It was indicated that at the landing, Li Xiaopeng motion gets the hip to move back, the trunk to stand up and the horizontal velocity of COG to slow down. This is thought to be the performance of sufficient landing, resulting from large security of rotational displacement of airborne and twist displacement. 3. It was indicated that at the board contact, Li Xiaopeng motion made a rapid rotation uprighting the trunk to recover slowing velocity caused by jumping with the horse in the back, and has already twisted the trunk nearly close to $40^{\circ}$ at board contact. Under the premise that elasticity is generated without the change of the feet contacting the board, it will give an aid to the rotation and twist of pre-flight. Thus, in the round-oH phase, the tap of waist according to the fraction and extension of hip joint and arm push is thought to be very important. 4. It was indicated that at the pre-flight, Li Xiaopeng motion showed bigger movement than the techniques of precedented studies rushing to the horse, and overcomes the concern of relatively low power of jump through the rapid rotation of the trunk. Li Xiaopeng motion secured much twist distance, increased rotational distance with the trunk bent forward, resulting in the effect of rushing to the horse. 5. At horse contact, Li Xiaopeng motion makes a short-time contact, and maintains horse take-off angle close to vertical, contributing to the increase of post-flight time and height. This is thought to be resulted from rapid move toward movement direction along with the rotational velocity of trunk rapidly earned prior to horse contact, and little shave of rotation axis according to twist motion because of effective twist in the same direction.