• Title/Summary/Keyword: Raising

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The safety behavior of agricultural reservoirs due to raising the embankment

  • Lee, Dalwon;Lee, Younghak
    • Korean Journal of Agricultural Science
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    • v.40 no.3
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    • pp.243-252
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    • 2013
  • This study was carried out to investigate safety evaluation of agricultural reservoirs due to raising the embankment. The seepage analysis and large-scale model test were performed to compare and analyze the pore water pressure(PWP), leakage quantity, settlement and piping phenomenon in the inclined core type and the vertical core type embankments. The PWP after raising the embankment showed smaller than before raising the embankment and the stability for piping after raising the embankment. The allowable seepage quantity and the allowable leakage for the steady state and transient conditions is within the range of safe management standard. After raising the embankment in the inclined core, there was no infiltration by leakage. For the vertical core, the PWP showed a large change by faster infiltration of pore water than in the inclined core. In a rapid drawdown, inclined core was remained stable but the vertical core showed a large change in PWP. Settlement after raising the embankment showed larger amounts of settlement than before raising the embankment. The leakage quantity before raising the embankment and the inclined core type showed no leakage. From the result, an instrument system that can accurately estimate a change of PWP shall be established for the rational maintenance and stabilization of raising the embankment for agricultural reservoirs.

The Story of Grandmothers' Experience Raising Children (할머니의 양육경험 이야기 : 자녀 세대와 손자녀 세대 양육을 중심으로)

  • Kim, Yoon Sook;Jun, Yeon Woo;Jo, Hea Soog
    • Korean Journal of Childcare and Education
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    • v.8 no.3
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    • pp.185-208
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    • 2012
  • The goal of this study is to take a look at grandmothers' experience raising children with a focus on the children's generation and the grandchildren's generation. To do this, we conducted in-depth interviews with three grandmothers who raised their children and their grandchildren. As a result, grandmothers' experience raising children was shown in three categories: change in the raising environment, the raising culture, and the sense of value of raising children. These results suggest that the raising experience of grandmothers who have raised children in the past and are currently raising children again are being changed by the transition in raising experience, raising culture, and sense of value of raising children.

Attitude control in spacecraft orbit-raising using a reduced quaternion model

  • Yang, Yaguang
    • Advances in aircraft and spacecraft science
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    • v.1 no.4
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    • pp.427-441
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    • 2014
  • Orbit-raising is an important step to place spacecraft from parking orbits into working orbits. Attitude control system design is crucial in the success of orbit-raising. Several text books have discussed this design and focused mainly on the traditional methods based on single-input single-output (SISO) transfer function models. These models are not good representations for many orbit-raising control systems which have multiple thrusters and each thruster has impact on the attitude defined by all outputs. Only one published article is known to use a more suitable multi-input multi-output (MIMO) Euler angle model in spacecraft orbit-raising attitude control system design. In this paper, a quaternion based MIMO model for the orbit-raising attitude control system design is proposed. The advantages of using quaternion based model for orbit-raising control system designs are (a) there is no need for mathematical transformations because the attitude measurements are normally given by quaternion, (b) quaternion based model does not depend on rotational sequences, which reduces the chance of human errors, and (c) the singular point of reduced quaternion model is the farthest from the operational point where linearization is performed. We will show that performance of quaternion model based design will be as good as the performance of Euler angle model based design for orbit-raising problem.

Analysis of Raising Skill Level and Prospects on Pet Industry by Socio-Ecological Status Group (도농 및 직업별 애완동물의 사육기술수준과 전망)

  • Kim, Gye-Woong;Kim, Seok-Eun
    • Journal of Korean Society of Rural Planning
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    • v.12 no.1 s.30
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    • pp.67-74
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    • 2006
  • This survey was carried out in order to obtain and apply the basic information on levels of raising skill, recognition of mutual infection between animal and human field of skill training, registration of animal pedigree, mating places, difficulties of raising, channel of marketing, and prospects of raising by socio-ecological status. Data were randomly gathered from 713 peoples, who composed of 398 men and 315 women, from March to August, 2005. As the results, questionnaires were analyzed that relatively 'the level of breeding skill is middle(43.9%)'. The average score for skill level is 1.81$\pm$0.79 when 4 points were used as a full mark. The recognition of mutual infection between human and animal is answered that 'many respondents don't know very well(62.6%)'. The questionnaire answered largely that 'the field of raising skill training is trimming and grooming(29.2%)'. The respondents recognized that 'The pedigree registration of pet is not essential(52.7%)'. The pet breeders answered that 'the mating for reproduction was conducted mainly in pet shops(34.3%)'. The breeders indicated mostly that 'the difficulties of raising were technical skills of raising(53.5%)'. The respondents answered that 'the deal of marketing of animal was mainly achieved through neighbors and close relatives(42.8%)'. The many questionnaires were recognized that 'breeders have a good prospect for the pet industry in the future(51.5%)'.

Behavior of Pore Water Pressure of Agricultural Reservoir According to Raising Embankment (농업용 저수지 둑 높이기에 따른 제체의 공극수압 거동)

  • Lee, Dal-Won;Lee, Young-Hak
    • Journal of The Korean Society of Agricultural Engineers
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    • v.54 no.3
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    • pp.11-17
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    • 2012
  • In this study, an experiment with large-scale model was performed according to raising embankment in order to investigate the cause of collapse by a change in water level of reservoir. Also, the settlement and pore water pressure by high water level and a rapid drawdown were compared and analyzed. After raising embankment for inclined core, there was no infiltration by leakage. For the vertical core, the pore water pressure showed a largely change by faster infiltration of pore water than in the inclined core. In a rapid drawdown, inclined core was remained stable but vertical core showed a largely change in pore water pressure. A settlement after a raising embankment showed a larger measure of settlement than before the raising embankment. The leakage quantity before a raising embankment and an inclined extension showed no leakage. Leakage in vertical extension was measured 160 $l$. From the result, a instrument system that can accurately estimate a change of pore water pressure shall be established for a rational maintenance and stabilization of raising embankment for agricultural reservoir.

A Phonetic Study of Vowel Raising: A Closer Look at the Realization of the Suffix {-go} (모음 상승 현상의 음성적 고찰: 어미 {-고}의 실현을 중심으로)

  • LEE, HYANG WON;Shin, Jiyoung
    • Korean Linguistics
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    • v.81
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    • pp.267-297
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    • 2018
  • Vowel raising in Korean has been primarily treated as a phonological, categorical change. This study aims to show how the Korean connective suffix {-go} is realized in various environments, and propose a principle of vowel raising based on both acoustic and perceptual data. To that end, we used a corpus of spoken Korean to analyze the types of syntactic constructions, the realization of prosodic boundaries (IP and PP), and the types of boundary tone associated with {-go}. It was found that the vowel tends to be raised most frequently in utterance-final position, while in utterance-medial position the vowel was raised more when the syntactic and prosodic distance between {-go} and the following constituent was smaller. The results for boundary tone also showed a correlation between vowel raising and the discourse function of the boundary tone. In conclusion, we propose that vowel raising is not simply an optional phenomenon, but rather a type of phonetic reduction related to the comprehension of the following constituent.

Seepage analysis of agricultural reservoir due to raising embankment (농업용 저수지 둑 높이기에 따른 제체의 침투류 해석)

  • Lee, Dal-Won;Lee, Kwang-Sol;Lee, Young-Hak
    • Korean Journal of Agricultural Science
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    • v.38 no.3
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    • pp.493-504
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    • 2011
  • This study was carried out to safety evaluation, the practical application and improvement of design method of the agricultural reservoir due to raising embankments. Also, it was to compare and analyze the pore water pressure (PWP), seepage (leakage) quantity and piping phenomenon according to high water table and rapid drawdown. The seepage analysis by finite element analysis was used for steady state and transient condition. The pore water pressure distribution for steady state and transient condition showed positive(+) PWP on the upstream slope, it was gradually changed negative(-) PWP on the downstream slope. The PWP in the core ranged from 100 ~ -33 kPa, the seepage line in the incline-type core suddenly decreased towards the lower levels from the higher levels. The PWP according to rapid drawdown is remained in the vicinity of the upstream slope, therefore, it is investigated to be in an unstable state by the slope stability analysis. The PWP after raising embankments showed smaller than in the before raising embankments. It was likely to be the piping phenomenon because the gradients in the before raising embankments showed largely at downstream slope, and the stability for piping in the after raising embankments increased stable state. The seepage quantity per 1 day and the leakage per 100m for the steady state and transient condition appeared to be safe against the piping. It reduced slightly regardless of the transient condition before the raising embankments and it decreased largely about 2.4 times in the early days after the raising embankments.

Subjective Hand and Physical Properties of Tricot based Artificial Suede according to Raising Finish (기모가공 조건에 따른 트리코 기포 인조 스웨이드의 태와 물성)

  • Roh, Eui Kyung;Oh, Kyung Wha
    • Fashion & Textile Research Journal
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    • v.16 no.1
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    • pp.153-159
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    • 2014
  • This study evaluates the changes of the subjective hand, preference, comfort and mechanical properties of tricot based artificial suede made from sea-island type micro fibers according to raising condition. The subjective hand and the preference of raised suede for jacket were rated by the 20's and 30's women experts according to raising cycles. Comfort properties were evaluated by air permeability, water vapor transmission, and thermal transmission. Mechanical properties were measured by the KES-FB system. The subjective hand of artificial suede was categorized into three hand factors: smoothness, warmness and thickness. Smoothness, warmness and thickness perception increased with raising cycles which affected hand preference and luxuriousness perception. The thickness and wale density of suede increased with the number of raising. Suede became more compact and less pliable and less stretchable due to increased fabric thickness; in addition, the surface of suede became smoother and compressive since the surface evenness of suede improved with smaller fiber fineness and an increased amount of naps covered the base fabric. Furthermore, water vapor transmission decreased and thermal insulation increased. The best raising conditions for artificial suede was four cycles in which artificial suede was preferred without changes in physical properties.

Hand Raising Pose Detection in the Images of a Single Camera for Mobile Robot (주행 로봇을 위한 단일 카메라 영상에서 손든 자세 검출 알고리즘)

  • Kwon, Gi-Il
    • The Journal of Korea Robotics Society
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    • v.10 no.4
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    • pp.223-229
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    • 2015
  • This paper proposes a novel method for detection of hand raising poses from images acquired from a single camera attached to a mobile robot that navigates unknown dynamic environments. Due to unconstrained illumination, a high level of variance in human appearances and unpredictable backgrounds, detecting hand raising gestures from an image acquired from a camera attached to a mobile robot is very challenging. The proposed method first detects faces to determine the region of interest (ROI), and in this ROI, we detect hands by using a HOG-based hand detector. By using the color distribution of the face region, we evaluate each candidate in the detected hand region. To deal with cases of failure in face detection, we also use a HOG-based hand raising pose detector. Unlike other hand raising pose detector systems, we evaluate our algorithm with images acquired from the camera and images obtained from the Internet that contain unknown backgrounds and unconstrained illumination. The level of variance in hand raising poses in these images is very high. Our experiment results show that the proposed method robustly detects hand raising poses in complex backgrounds and unknown lighting conditions.

A Phenomenological Study on Disabled Parents' Experiences of Raising Children: Focusing on Mothers (신체장애인 부부의 자녀양육경험에 관한 현상학적 연구: 어머니를 중심으로)

  • Lee, Songhee;Lim, Jeungsuk;Lee, Miwoo;Chung, Semi
    • Journal of Family Relations
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    • v.21 no.1
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    • pp.3-27
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    • 2016
  • Objective: The purpose of this study was to explore the essence of disabled parents' experiences of raising children. Method: Five families, which were composed with parents with physical disabilities and children, were participated into this study. One-time interview was conducted with mother of each family and it was recorded, coded, and analysed using method of Giorgi's phenomenological study. Result: Three superordinate themes, nine subordinate themes, and 22 concepts were derived. The essence of disabled parents' experiences of raising children was "disabled parents' growth with their children despite of prejudice." This represented that even though disabled parents faced with diverse kinds of difficulties, they put their heart and soul into raising their children and they encouraged their children to have their feet on the ground firmly. Finally, disabled parents went out into the world with their children. Conclusion: The current study illustrated how those stories about raising children could be interpreted from the perspective of the family relation, and suggested possible ways to support disabled parents for raising children.