• Title/Summary/Keyword: RHA

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Bony Spurs at the First Metatarsocuneiform Joint -A Case Report- (제 1 중족 설상골 관절의 골극 -1례 보고-)

  • Lee, Woo-Chun;Park, Hyun-Soo;Choi, Deu-Sick;Rha, Jong-Deuk
    • Journal of Korean Foot and Ankle Society
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    • v.3 no.1
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    • pp.49-52
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    • 1999
  • Slight protrusion of the dorsum of midfoot without degenerative arthritis is common and usually can be treated by avoiding pressure of the shoe. Primary or posttraumatic degenerative arthritis accompanied by severe functional disability is treated by realignment and arthrodesis of the involved joints. We report a case of osteophytic changes in the form of lipping at the base of the first metatarsal and medial cuneiform which was treated by resection of the spurs. The cause of these spurs may be the congenital coalition of the first metatarsocuneiform joint.

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Customer Relationship Management for the E-Grocery Sector

  • Rha Jong-Youn;Hooker Neal H.;Widdows Richard
    • International Journal of Human Ecology
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    • v.6 no.1
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    • pp.41-59
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    • 2005
  • In this paper, the e-grocery sector of the U.S. is used as an illustrative example of how to assess consumers' demands for customer relationship management and to investigate whether these demands coincide with effective Customer Relationship Management (CRM) strategies suggested by academic researchers and provided by practitioners. Surveys evaluating the perceived importance of CRM items were administered accordingly. The findings show that, overall, consumers' did not differ considerably to the experts. The results of descriptive analyses showed that academicians had a more closely in-lined view with consumers than did practitioners. Although not statistically significant, practitioners perceived loyalty programs to be more important than did consumers or academicians. This might suggest that loyalty programs are primarily serving as a way of data mining, and are thus failing to provide benefits to consumers. Overall, items related to technology deployment were perceived to be more important by practitioners than consumers or academicians.

Fabrication of Super Water Repellent Surfaces by Vacuum Plasma (진공 플라즈마 처리를 통한 초소수성 표면 제작 및 특성 평가)

  • Rha, Jong-Joo;Jeong, Yong-Soo;Kim, Wan-Doo
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.32 no.2
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    • pp.143-147
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    • 2008
  • Super-hydrophobic surfaces showed that contact angle of water was higher than 140 degrees. That surface could be made several methods such as Carbon nano tubes grown vertically, PDMS asperities arrays, hydrophobic fractal surfaces, and self assembled monolayers coated by CVD and so on. However, we fabricated super-hydrophobic surfaces with plasma treatments which were very cost efficient processes. Their surfaces were characterized by static contact angles, advancing, receding, and stability against UV irradiation. Optimal surfaces showed static contact angles were higher than 150 degrees. Super-hydrophobic property was remained after UV irradiation for one week.

Effect of Balance Performance in the Down syndrome child by the Sensorimotor Program (감각운동프로그램을 통한 다운증후군 아동의 균형 수행력에 관한 연구)

  • Rha, Ki-Yong
    • The Journal of Korean Physical Therapy
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    • v.13 no.3
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    • pp.701-710
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    • 2001
  • The purpose of study was to compare the effect of balance performance in the Down syndrome child by the Sensorimotor program. Twenty-four aged 8 to 16 years participated in this study. Participants were divided into experimental(12) and control group(12). Experimental group were received sensorimotor program in three times a week for 6 weeks. But control group were not participants this program. All subjects were assessmented to clinical test such as Oseretsky and Berg balance test. Experimental and control subjects were tested before, after and end(after summer vacation)of the trial. The results were as follow; 1. The physique of Down syndrome child is more dropped than normal child. 2. Balance of Down syndrome child prior to test is clearly dropped. but effect of Sensorimotor program is appeared in experimental group. 3. Balance of experimental group is more decreased than prior to during the summer vacation.

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A Study on Structual Analysis of Bellows for Automotive (자동차용 벨로우즈의 구조해석에 관한 연구)

  • Rha Wan Yong;Kim Mi-Soo;Oh Yong Suk
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.13 no.6
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    • pp.102-106
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    • 2004
  • The purpose of the study is to perform structual analysis of 9 type bellows for automotive. The bellows joint which was used as a absorber or safety equipment to prevent the deformation or fracture of a structure, has been analyzed by the FEM modeling using axi-symmetric conical frustum element. Using FEM the general behavior of bellows analysis can be investigate easily, as well as the stability of the analysis can be guarantee. The results of finite element structual analysis and actual result gave a good agreement.

In vitro Tissue Culture of Aloe arborescens Mill

  • Rha, Eui-Shik;Kim, Hyun-Soon;Lee, Seung-Yeob
    • Plant Resources
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    • v.1 no.2
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    • pp.109-112
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    • 1998
  • Aloe in vitro culture was attempted to induce callus and regeneration ability from different explant sources onto MS medium with 0.5mg/l NAA plus 1.0mg/l BA. Anthers that no developed any callus and plant regeneration, while only four out of 274 filament explants induced calli at cut edge without regenerated plants. Twenty ovary explants regenerated four direct plantlets without via callus from the base of epidermal tissues. Regenerated plants on the root tip gave 2n=14 of chromosome numbers.

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A theoretical study on the hydroelastic behavior of Large floating offshore structures (대형부체구조물(大型浮體構造物)의 유체(流體)·탄성체(彈性體) 연성거동의 이론적 해석에 관한 연구(硏究))

  • Lee, Sang-Yeob;Rha, Young-Ho
    • Journal of the Korean Society of Industry Convergence
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    • v.4 no.4
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    • pp.433-439
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    • 2001
  • A large floating structure is attracting great attention in recent years from the view of ocean space utilization. Its huge scale in the horizontal directions compared with the wavelength and relatively shallow depth make this type of floating structure flexible and its wave-induced motion be characterized by the elastic deformation. In this paper, a boundary integral equation method is proposed to predict the wave-induced dynamic response mat-like floating offshore structure. The structure is modeled as an clastic plate and its elastic deformation is expressed as a superposition of free-vibration modes in air. This makes it straightforward to expand the well-established boundary integral technique for rigid floating bodies to include the hydroelastic effects. In order to validate the theoretical analysis, we compare with the experimental result of previous model test. Satisfactory agreement is found between theory and experiment.

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Silica Induces Nuclear Factor-kB Activation through TAK1 and NIK in Rat2 cell line

  • Young Lim;Nam, Hae-Yun;Rha, Suk-Joo;Kim, Young-Hoon;Cho, Yong-Yeun;Yang, Ki-Hwa;Kim, Kyoung-Ah;Lee, Kweon-Haeng
    • Proceedings of the Korean Society of Toxicology Conference
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    • 2003.05a
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    • pp.75-75
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    • 2003
  • Silica has been known to be a factor in acute cell injury and chronic pulmonary fibrosis. In Rat2 fibroblasts, silica induced the activation of NFkB, which plays a crucial role in regulating the expression of many genes involved in the subsequent inflammatory response. In addition, we observed that TAK1 and NIK were involved in silica-mediated NF-kB activation in Rat2 cells. (omitted)

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An Ecological Analysis of Early Child Care Arrangements (1) (영유아 양육환경에 대한 생태학적 연구 (1) - 가정과 어린이집을 중심으로 -)

  • Lee, Young;Shin, Eun Juh;Rha, Jung Hay
    • Korean Journal of Child Studies
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    • v.15 no.2
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    • pp.37-54
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    • 1994
  • The home environments, daily activities, caregiving behaviors of mothers and teachers, infant's verbal behaviors, attachment to mothers and teachers of day care infants were compared to those of home-reared infants. 30 two-year-old home-reared infants and their mothers were observed at home by the time sampling method and 31 two-year-old day care infants and their mothers and teachers were observed at home or at the center. The HOME scale, the behavioral checking lists for caregiving behaviors and for the infants' verbal behaviors, and the Attachment Q-set were used for the home and center observations. It was found that the characteristics of early environments of day care infants were different from those of home-reared infants, but that infants' attachment to the mothers were not different. However, day care infants' attachment security scores to their mothers were higher than to their teachers.

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