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Biomechanical Comparative Analysis of Two Goal-kick Motion in Soccer (두 가지 축구 골킥 동작의 운동역학적 비교 분석)

  • Jin, Young-Wan;Shin, Je-Min
    • Korean Journal of Applied Biomechanics
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    • v.15 no.1
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    • pp.29-44
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    • 2005
  • The purpose of this study is to reveal the effects of two different kicks, the drop kick and the punt kick, into the kicking motion, through the kinetic comparative analysis of the kicking motion, which is conducted when one kicks a soccer goal. To grasp kinetic changing factors, which is performed by individual's each body segment, I connected kicking motions, which were analyzed by a two dimension co-ordination, into the personal computer to concrete the digits of it and smoothed by 10Hz. Using the smoothed data, I found a needed kinematical data by inputting an analytical program into the computer. The result of comparative analysis of two kicking motions can be summarized as below. 1. There was not a big difference between the time of the loading phase and the time of the swing phase, which can affect the exact impact and the angle of balls aviation direction. 2. The two kicks were not affected the timing and the velocity of the kicking leg's segment. 3. In the goal kick motion, the maximum velocity timing of the kicking leg's lower segment showed the following orders: the thigh(-0.06sec), the lower leg(-0.05sec), the foot(-0.018sec) in the drop kick, and the thigh(-0.06sec), the lower leg(-0.05sec), the foot(-0.015sec) in the punt kick. It showed that whipping motion increases the velocity of the foot at the time of impact. 4. At the time of impact, there was not a significant difference in the supporting leg's knee and ankle. When one does the punt kick, the subject spreads out his hip joint more at the time of impact. 5. When the impact performed, kicking leg's every segment was similar. Because the height of the ball is higher in the punt kick than in the drop kick, the subject has to stretch the knees more when he kicks a ball, so there is a significant affect on the angle and the distance of the ball's flying. 6. When one performs the drop kick, the stride is 0.02m shorter than the punt kick, and the ratio of height of the drop kick is 0.05 smaller than the punt kick. This difference greatly affects the center of the ball, the supporting leg's location, and the location of the center of gravity with the center of the ball at the time of impact. 7. Right before the moment of the impact, the center of gravity was located from the center of the ball, the height of the drop kick was 0.67m ratio of height was 0.37, and the height of the punt kick was 0.65m ratio of height was 0.36. The drop kick was located more to the back 0.21m ratio of height was 0.12, the punt kick was located more to the back 0.28m ratio of height was 0.16. 8. There was not a significant difference in the absolute angle of incidence and the maximum distance, but the absolute velocity of incidence showed a significant difference. This difference is caused from that whether players have the time to perform of not; the drop kick is used when the players have time to perform, and punt kick is used when the players launch a shifting attack. 9. The surface reaction force of the supporting leg had some relation with the approaching angle. Vertical reaction force (Fz) showed some differences in the two movements(p<0.05). The maximum force of the right and left surface reaction force (Fx) didn't have much differences (p<0.05), but it showed the tendency that the maximum force occurs before the peak force of the front and back surface (Fy) occurs.

A Study On the costume of the Koryo Dynasty (2)-$\cicled3$-See Through by the Human being, on the Buddist Painting of Koryo Dynasty Engraved Painting on the wood.- (고려시대 인물관련 제작물을 통해서 본 복식제도에 관한 연구(2)-고려시대 인물관련 제작 불화(佛畵)중 '경판화'를 통해서 본 복식제도에 관한 연구(2)-$\cicled3$-)

  • 임명미
    • Journal of the Korean Society of Costume
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    • v.26
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    • pp.221-232
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    • 1995
  • It was aimed to study the costume of Koryo dynasty based upon the one hundred and thirty four pictures of the engraved painting on the wood. The costume to study were made about 400 years during the King Mok-jong(1006) to the forth year of the king Wu based upon the Avatamaka Sutra and Pulsul-Yaesu 가) Men's wear 1. Hair style and hair dress ; Man tied up a top knot and they put on the hat such as a Kuan, Kun, and Mo. The young boys binds his hair up one, two, and three knots. 2. Clothes : 1) King wore an uniform of Mien-lu Kuan system. 2) The Crown Prince and high rank officials wore Yuan-yu-Kuan Won-jung-po-ju-Kuan, Sa-bang-Kuan, Yun-wha-Kuan and montain shape Po-ju-Kuan as a court dress. 3) Officials put on the Pok-du as an official dress and Won-jung-ip-mo, Kun and Mo as an everyday dress, the monk put on the diamond shape Do-kuan and Du-kun and the soldier put on the Helmet. Costume system of man was as follows ; They wore exchanged shape collar, big sleeve jacket, long skirt, apron, hanging precious stone big belt as a Mien-pok. 4) The soldiers wore helmet, Keun-Kap, Scarf, Pee-Bak, Hung-Kap, Pok-Kap, Yang-Dang-Kap, We-Yo-Kap, Kum-Kap, and caries arms. Lower-level officials wore Pe-Bal, Kun-Mo, gae, won-leung, very small sleve jacket, a long coat reaching up to the knee length, slacks, belt, loin cloth and apron. 5) Children's bind their hair up angle shape and wore a half long jacket raching up to the hip and slacks. 나) Women's wear; 1. hair style and hair dress; 1) High rank women's hair style was very extravaganceful. They made their hair top knot (one, two, or more knots) and decoraed precious stone, pan shape head dress, wheel shape head dress, and flower shape precious stone decorated head dress. 2. Clothes ; 1) High rank ladi's wore Kun-Kyun attached jacket, and jacket sleeves decorated pleats, and pleats decorated long skirt, apron, back apron, knot belt, scarf, this type is the same with Dang Dynasty, five dynasty of china, Song, Kum, Won, Myung Dynasty, and our costume of Poe-hae, and Shilla Dyansty. 2) Official ladies wore exchange shape collor, big sleeve jacket, long pleats skirt, apron, and back apron, scarf. 3) Women wore top knot hair style and decorated by ribbons. Shoulder scarf attached small sleeve jacket and wore reaching up to the knee length. Side seam is open and under wear was long skirt. 4) High knot hair style and exchanged shape collor jacket, under wear wore long skirt. They wore under skirts and the jackets. 5) High knot hair style, exchange shape collor jacket reaching up to the knee length small sleeve under wear wore long skirt, belt. 6) High knot hair style, big sleeve jacket and long skirt. 7) Foot wear wore boots, mokasin type shoes, sandal.

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The Change of Media and Emerging Journalistic Norm and Value: An exploration Based on the Young-hee Rhee's Idea (뉴미디어 환경과 언론인 직업 규범의 변화: 리영희 언론정신을 통한 탐색연구)

  • Lee, Bong-Hyun
    • Korean journal of communication and information
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    • v.59
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    • pp.31-49
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    • 2012
  • This study investigates normative role model of the journalists under the changing environment. Firstly, this article explores what pressure the new media environment gives to the journalists in their routine of news production and distribution. These are stated from the angle of epistemological, professional and interactive pressure. Next, as a reference for the standard journalism in the age of mass media, the idea of Rhee Young-hee, a late journalist who won respects from many Korean journalists, is studied. His firm belief in the pursuit of hard facts, rigorous investigative writing and expertism are spelt out. Then, this study explores how, in real term, this pressure changes the journalistic value, norm and practices in the newsroom. Ten of Koran journalists are interviewed in order to get their idea about the emerging journalistic standards under the digital environment. From this in-depth interviews, it is conclued that the pursuit of hard fact, investigative writing, expertism of Rhee Young-hee are, nonetheless the change of the media technology, still effective and provide good reference points for the enhancement of the standard of journalism in Korea. However, it is also suggested that the methods to fulfil desirable journalism in the digital age should be different from that of the mass communication age. The interviewees make propose that the journalist, as a network node, news curator or coordinator, should actively interact with the audiences facilitating their enhanced potential as a news 'prosumer'(producer and consumer).

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A Study on 'the Character' in Adolfo Bioy Casares' Literature Works - Focusing on protagonist/antagonist, protagonist narrator/editor narrator (아돌포 비오이 까사레스 작품의 등장인물 연구 - 주인공과 반주인공, 주인공 화자와 편집자 화자를 중심으로)

  • Jeon, Yong Gab
    • Cross-Cultural Studies
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    • v.25
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    • pp.453-482
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    • 2011
  • Until now and in the studying of fantastic literature, there has been likely to regard the character as secondary element, compared to their actions. However, it has to be recognized that the characters is a barometer to divide the boundary among the marvellous literature, or fantasy, magic realism, etc., in particular it is an important narrative element to understand an epistemological vision of fantastic literature. This thesis analyzes the characters, focusing on two dimensions divided such as between protagonist/antagonist and protagonist narrator/editor narrator. The characters in fantastic literature are usually set-up as people like ourselves, because it is necessary for the readers to consider the supernatural phenomenon as real world situation. The reason why many characters in fantastic literature usually meet a tragic end is that the structure of fantastic literature embedded unresolved supernatural confusion into ordinary order in the end, while antagonists are viewed as holders of extraordinariness and they are far from vero-similarity. Together with usual characters who represent the world of logic and reason, antagonists who seek to understand more about the universe totally and thus regarded as symbols of intuition and imagination and ultimately are the elements of fantastic literature. On the other hand, the "first person narrator" is divided between "protagonist narrator" who narrates the supernatural things through his/her own experience to readers and "editor narrator" who narrates the other's experiences. Particularly in the case of "editor narrator", he/she may narrates the stories with different explication and angle, which lead to hesitation and confusion for readers to identify between reality and unreality or natural logic and supernatural one. Even though there are various categories in fantastic literature, this thesis exclude 'neo fantastic', 'metaphysical fantastic' ones, characterized as a possibility of convergence with the secondary interpretation and symbolic implication. Beyond these materials, the literatures which involved with this thesis and analysis are normally related with traditional fantastic literary works which supernatural events intervene in real world and bring out collision between real and unreal, or natural and supernatural logics. Based on this criteria, this thesis chooses literary works such as "De los Reyes Futuros", "El Perjurio de la Nieve" written by Adolfo Bioy Casares who is a representative author in Latin American fantastic literature.

Sports Biomechanical Analysis of Physical Movements on the Basis of the Patterns of the Ready Poses (준비동작의 형태 변화에 따른 신체 움직임의 운동역학적 분석)

  • Lee, Joong-Sook
    • Korean Journal of Applied Biomechanics
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    • v.12 no.2
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    • pp.179-195
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    • 2002
  • The purpose of this research is to provide a proper model by analyzing the sports biomechanical of physical movements on the basis of the two patterns(open-stance and cross-stance) at the ready-to-start pose. The subjects for this study are composed of five male handball players from P university and five female shooting players from S university. Three-way moving actions at start(right, left, and forward) are recorded with two high-speed video cameras and measured with two Force platforms and a EMG system. Three-dimensional action analyzer, GRF system, and Whole body reaction movement system are used to figure out the moving mechanisms at the start pose. The analytic results of the moving mechanism at the start pose were as follows. 1. Through examining the three-way moving actions at start, I have found the cross-stance pose is better for the moving speed of body weight balance than the open-stance one. 175 degree of knee joint angle at "take-off" and 172 degree of hip joint angle were best for the start pose. 2. The Support time and GRF data shows that the quickest center of gravity shift was occurred when cross-stanced male subjects started to move toward his lefthand side. The quickest male's average supporting time of left and right foot is 0.19${\pm}$0.07 sec., 0.26${\pm}$0.06sec. respectively. The supporting time difference between two feet is 0.07sec. 3. Through analyzing GRF of moving actions at start pose, I have concluded that more than 1550N are overloaded on one foot at the open-stance start, and the overloaded force may cause physical injury. However, at the cross-stance pose, The GRF are properly dispersed on both feet, and maximum 1350N are loaded on one foot.

A Kinematical Analysis of Belle Motion on Parallel Bars (평행봉 Belle 기술동작의 운동학적 분석)

  • Kong, Tae-Ung
    • Korean Journal of Applied Biomechanics
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    • v.15 no.4
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    • pp.43-53
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    • 2005
  • This study is to define how the difference of athletic change influence on the last regrasp after somersault in Belle movement of parallel bars. For his study, the following conclusion was produced by analysis of athletic change by means of three dimensional visual image in three athlete of nation. 1. As the picture of S1, there are total used time(2.01 sec), S3(2.17 sec) and S2(2.19 sec). In case of a short needed time, it is difficult for them to perform the remaining movement of the vertical elevating flight easily and comfortably, it is judged as performing the small movement with restrict swing. 2 In the change of body center sped by each event, it is calculated as $-89.1^{\circ}$ the narrowest in S1, $-81.96^{\circ}$ the widest and then $86.34^{\circ}$ in S3. In E3 event, average compound speed is 4.07m/s, S2 showed the fastest speed of 4.14m/s whereas S1 the narrowest angle of 3.95m/s. 3. A shoulder joint and coxa are the period of mention in E3. In E4 which was pointed out the longest vertical distance, S2 that is indicated the highest vertical height as the period of detach in parallel bars. showed -3.91m. This is regarded as a preparatory movement for dynamic performance after using effectively elastic movement of shoulder joint and coxa while easily going up with turning back movement. In the 5th phrase, long airborne time and vertical change position is showed as the start while regrasping securely air flight movement from high position. 4. In E5, a long flight time and a long vertical displacement were shown as the regrasp after somersault efficiently in high position with stability from the point of the highest peak of the center of the body. Especially, S2 is marked as a little bit long position, while S1 is reversely indicated as performing somersault and unstable motion in a low position. 5. In E3, at the point of the largest extension of the shoulder joint and hip joint the shoulder joint is largely marked in $182^{\circ}$ and the hip point $182^{\circ}$ in S2. The shoulder joint is marked at the smallest angle in $177^{\circ}$ and the hip point $176^{\circ}$ in S1. And S1 is being judged by its performance of the less self - confident motion with lessening a breath of swing. S2 makes the most use of flexion and extension of the shoulder joint and the hip joint effectively. It was performed greatly with swinging and dropping the rotary movement and the rotary inertia naturally. 6. In E6, as the point of regrasp of the upper arm in parallel bars it is recognized by the that of components of vertical and horizontal velocity stably. During this study, the insufficient thing and the study on the parallel bars at a real game later are more activated than now. If it is really used as the basic materials by means of Belle Picked Study of Super E level after Bell movement, you may perceive the technique movement previously and perform without difficulty. Especially, such technique as crucifix is quite advantageous for oriental people thanks to small body shape condition. In conclusion we will nicely prepare for our suitable environment to gradually lessen trials and errors by analyzing and studying kinematically this movement.

A Comparison of coincidence between the Light field & the Radiation field using film and BIS (필름과 BIS 영상장치를 이용한 광/방사선조사야 일치성 비교평가)

  • Bang, Dong-Wan;Seok, Jin-Yong;Jeong, Yun-Ju;Choi, Byeong-Don;Park, Jin-Hong
    • The Journal of Korean Society for Radiation Therapy
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    • v.16 no.2
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    • pp.33-41
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    • 2004
  • Purpose : Film has been the primary tool in coincidence testing between the light field and the radiation field, which constitutes the quality assurance list of a linear accelerator. But there is a great chance of errors being different among the observer when using film. Thus this study set out to use the BIS(Beam Image System) in addition to film in comparing and evaluating coincidence results between the two fields and in searching for the improvement measures. Materials & Methods : Photon beam of 6 and 15MV was exposed to film and the BIS using a linear accelerator. The light and radiation fields were each $50{\times}50,\;100{\times}100,\;and\;200{\times}200mm^2$. The gantry angle was $0^{\circ}$ when using film and $0^{\circ}\;and\;270^{\circ}$ when using the BIS. The devices adopted to test coincidence between the two fields were a ruler and film scanner when using film. With the BIS, the width of the scanned light and radiation fields was measured for errors with setting the X and Y axis. Results : The visual measurements of the observer with film resulted that the radiation field was bigger than the light field and that their maximum error was 1.9mm. The results were the same with the measurements using the film scanner except for the average error, which was less than 1.9mm. On the contrary, the measurements using the BIS showed that the light field was bigger than the radiation field at the gantry angle of $0^{\circ}\;and\;270^{\circ}$. The maximum error was 0.96mm, and the error range was $<{\pm}2mm$ both in the X and Y axis. The average error of ${\Delta}X$, Y was the smallest in the order of the visual film measurements, film scanner measurements, and BIS measurements Conclusion . This requires a careful measurement for accurate quality assurance since errors are much different according to each observer that tests coincidence between visual fields with film. And an observer needs to use another image device or develop a measuring device of his own if it seems necessary for accurate measurements.

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A Study on the Arrangements of YangjinDang in Sang-ju Foundation by Date on the Excavation and Jungsuki (중수기 및 발굴 자료로 본 상주 양진당의 배치에 관한 연구)

  • Kim, Chan-Yeung;Chung, Myung-Sup
    • Journal of architectural history
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    • v.20 no.4
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    • pp.61-80
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    • 2011
  • This study estimated the prototype of Yangjindang at the time of its foundation by putting together the literature and discovered data and historical research on family related to Sangju Yangjindang, and looked at its architectural characteristics. These are summarized as follows: First, Yangjindang is an office building which was completed in three years [1629] after its start of construction when Keomgan Jojeong was at the age of 72 [1626] in his latter days and it was used for performing ancestral rites for Jojeong's forefathers of the head family of Pungyang Jo by family origin. Yangjindang was founded as a base of utopia for putting ancestral rites & commemoration, harmoniousness of a tribe, and educational idea into practice together with Ojakdang. Such a movement can be judged to interpret and apply the circumstances of the times realistically and flexibly where they tried to pursue the promotion of Confucianism & studies of the proprieties as well as the consciousness of practice, and to bring a tribe into harmony after the war through the retirement of Toegye School. Second, it is located at a topographically ideal spot on the edge of the Jangcheon-a tributary of Nakdong with a good physiology and landscape and its location was also the lot for a house of Jojeong's ancestor, which was burned down by war. Behind such a location and planning of Yangjindang, it is presumed, though not certain that it was modelled after Naeap village at Andong- Jojeong's parents-in-low's home. Third, as for its foundation size, it's a head house as much as about more than 100-kan, and its structure is composed of Samyo, Bonche, and Yangjindang. In addition, arrangements of buildings and its composition system and renovation procedures followed Chu-tzu Garyoe. Composition of Samyo can be restored to Yangjindang, Jugo, Woesammun, and Samyo; however, there has been no case of existence in case of Jugo building composition & arrangement takes on an aspect of a compromise between Gamyojido and Sandangjido of Garoe, which seems to be the result from flexibly interpreting and applying the rituals and studies of the proprieties of Toegye School in keeping with locational topography and realistic circumstances while making it a principle for them to observe by Toegye School. There exists a difference between Bonche and its counterpart of the upper class housing at Sangju district in that Bonche[main building] is a squre-shaped 'Ttuljip' typical of Andong setting a family ancestral ritual as a main function. Fourth, there existed a lot of hardships in raising money to cover repairs in time of doing repairs to this structure after 180 years since its establishment. In case of the repair work on Bonche, the level of renovation was limited to the replacement of old materials for rafters, doorpost, roof members and railings with new materials, together with partial alterations in case of window system. It is estimated that Yangjindang was renovated in 1808, and afterwards it was renamed Okryujeong after being re-built at another site. Through the repairs, the floor was expanded for the clan's meeting, and angle rafters and roof members were mended as well. Especially, the plane and structure of Okryujeong which was re-built at another site are expected to give clues to its restoration due to the resemblance to original appearance of Yangjindang at the time of its renovation in 1808.

Pollutant Loading and Changes of the Self - Purification Capacity with Season in Gokneung Stream Ecosystem (곡릉천 생태계의 오염부하량과 계절에 따른 자정능의 변화)

  • 이선경;심규철;김재영;김준민;장남기
    • The Korean Journal of Ecology
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    • v.17 no.3
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    • pp.355-366
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    • 1994
  • The purpose of this study was to investigate the changes of water quality and the patterns of self-purification with season in Gokneung stream. The vegetation in the ecosystem around Gokneung stream was dominated by Quercus species. In the physicochemical analysis based on the contents of DO, BOD, conductivity and total phosphorus, the upstream seemed to have been polluted, but the downstream was self-purified. In biological investigation by bentic macroinvertebrates, the result was similar to that in the physicochemical analysis. The self-purification constant based on BOD of the upstream, 1.013, was the highest. In the self-purification constants with month, that of September was 0.995 and that of January was 0.272. These results indicated that the self purification capacities of spring and autumn were larger than those of winter and summer in Gokneung stream.

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Airborne Hyperspectral Imagery availability to estimate inland water quality parameter (수질 매개변수 추정에 있어서 항공 초분광영상의 가용성 고찰)

  • Kim, Tae-Woo;Shin, Han-Sup;Suh, Yong-Cheol
    • Korean Journal of Remote Sensing
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    • v.30 no.1
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    • pp.61-73
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    • 2014
  • This study reviewed an application of water quality estimation using an Airborne Hyperspectral Imagery (A-HSI) and tested a part of Han River water quality (especially suspended solid) estimation with available in-situ data. The estimation of water quality was processed two methods. One is using observation data as downwelling radiance to water surface and as scattering and reflectance into water body. Other is linear regression analysis with water quality in-situ measurement and upwelling data as at-sensor radiance (or reflectance). Both methods drive meaningful results of RS estimation. However it has more effects on the auxiliary dataset as water quality in-situ measurement and water body scattering measurement. The test processed a part of Han River located Paldang-dam downstream. We applied linear regression analysis with AISA eagle hyperspectral sensor data and water quality measurement in-situ data. The result of linear regression for a meaningful band combination shows $-24.847+0.013L_{560}$ as 560 nm in radiance (L) with 0.985 R-square. To comparison with Multispectral Imagery (MSI) case, we make simulated Landsat TM by spectral resampling. The regression using MSI shows -55.932 + 33.881 (TM1/TM3) as radiance with 0.968 R-square. Suspended Solid (SS) concentration was about 3.75 mg/l at in-situ data and estimated SS concentration by A-HIS was about 3.65 mg/l, and about 5.85mg/l with MSI with same location. It shows overestimation trends case of estimating using MSI. In order to upgrade value for practical use and to estimate more precisely, it needs that minimizing sun glint effect into whole image, constructing elaborate flight plan considering solar altitude angle, and making good pre-processing and calibration system. We found some limitations and restrictions such as precise atmospheric correction, sample count of water quality measurement, retrieve spectral bands into A-HSI, adequate linear regression model selection, and quantitative calibration/validation method through the literature review and test adopted general methods.