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Quasi-Three Dimensional Stability Analysis of the Geosynthetic-Reinforced Soil Retaining Wall System (GRS-RW 보강토벽체 공법의 준3차원 안정해석)

  • 김홍택;박준용
    • Geotechnical Engineering
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    • v.14 no.4
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    • pp.177-204
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    • 1998
  • In the present study, a method of quasi-three dimensional stability analysis is proposed for a systematic design of the GRS-RW(Geosynthetic-Reinforced Soil Retaining Wall) system based on the postulated three dimensional failure wedge. The proposed method could be applied to the analysis of the stability of both the straight-line and cove-shaped are. As with skew reinforcements. Maximum earth thrust expected to act on the rigid face wall is assumed to distribute along the depth, and wall displacements are predicted based on both the assumed compaction-induced earth pressures and one dimensional finite element method of analysis. For a verification of the procedure proposed in the present study, the predicted wall displacements are compared with chose obtained from the RMC tests in Canada and the FHWA tests in U.S.A. In these comparisons the wall displacements estimated by the methods of Christopher et at. and Chew & Mitchell are also included for further verification. Also, the predicted wall displacements for the convex-shaped zone reinforced with skew reinforcements are compared with those by $FLAC_{3D}$ program analyses. The assumed compaction-induced earth pressures evaluated on the basic of the proposed method of analysis are further compared with the measurements by the FHWA best wall. A parametric stduy is finally performed to investigate the effects of various design parameters for the stability of the GRS-RW system

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Effect of Heading and BMR types on the Agronomic Characteristics, Forage Yield and Quality of Sorghum × Sudangrass Hybrid (출수형태와 BMR이 수수×수단그라스 교잡종의 생육특성, 생산성 및 품질에 미치는 영향)

  • Kim, Jong-Duk;Ko, Ki-Hwan;Kwon, Chan-Ho
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.32 no.3
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    • pp.293-300
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    • 2012
  • This experiment was carried out to compare the agronomic characteristics, forage yield and quality of sorghum ${\times}$ sudangrass hybrid at two locations (Sungju and Cheonan) in 2009. The experiment was a randomized complete block design with three replications. The eight recommended hybrids used in this experiment were 'Sordan 79', 'SX17', 'Honey chew', 'Honey grazer', 'G7', 'Jumbo', 'Green star' and 'GT56' hybrids. The heading of four hybrids were headed at both region, Sungju and Cheonan. There are no big differences in general agronomic characteristics among hybrids, but brix scale of heading and BMR (brown mid rib) types were higher than those of other hybrids. Dry matter (DM) and plant height of heading type hybrids were higher than those of headless types. The fresh, DM and TDN (total digestible nutrients) yields of heading type hybrids were also higher than those of headless types, and BMR types were lower than others. The crude protein and crude ash contents of headless hybrids were higher than those of heading hybrids, while its non-fiber carbohydrate (NFC) content showed the opposite results. The acid detergent fiber (ADF) and NFC contents of BMR types were lower than others. The results of this experiment indicates that heading hybrids were more higher than headless hybrids in the agronomics and forage yield of sorghum ${\times}$ sudangrass. However heading types were lower headless types in quality of sorghum ${\times}$ sudangrass. And BMR hybrids were also high quality of sorghum ${\times}$ sudangrass hybrid because of higher brix content and lower ADF content among tested hybrids.

The Reconstruction of the Lip Defect due to Electrical Burn (Case Report) (전기적화상에 의한 구순결손의 재건-증례보고-)

  • Min, Byung-Il;Kim, Byeong-Rin;Kim, Kyoung-Won;Park, Jin-Kyu
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.12 no.3
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    • pp.63-67
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    • 1990
  • Electrical burns of the lips are most frequently seen in small children, who are apt to chew on electrical cord or plug, the ends of extension cords in their mouth, saliva creates a short circuit across the terminals within the plug, causing an electrical burn. Tissue destruction with electrical burns is sudden and extensive. Extensive, deep coagulation necrosis is instaneously produced by the extreme temparatures of electrical arc. If the child is well grounded, the circuit flow through his body may cause cardiac arrest. The purpose of this report is to document two cases of electrical lip burn and reconstruction of the lip defect with some local flap techniques. For case 1, Z plasty & V-Y plasty and lengthening of the commissure and in case 2, Abbe flap technique was used and scar was revised later. Z-plasty and V-Y plastry were used for scar release and Abbe flap was designed on lower lip to meet the need of upper lip. For short of right lip width, lengthening of the commissure was done. We are to report the improvement with forementioned operation on the patient of electrical burn upon the lip.

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Satisfaction and demand of the New Prosthesis Treatment according to the oral health condition of the geriatric patient in Daejeon City (대전지역 노인환자의 구강보건실태에 따른 치과보철의 만족도와 요구도)

  • Jung, Jae-Kwan;Lee, Su-Ok
    • Journal of Technologic Dentistry
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    • v.31 no.3
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    • pp.59-66
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    • 2009
  • In this study 240 geriatric patients, aged 60 year and over were evaluated using a questionnaire and oral examination for their oral status, demand and satisfaction of prosthesis treatment. 1. The single main complaint was regarding from the existing removable prosthesis. When the complaints were catagorized into larger groups, complaints regarding existing prosthesis were 32% and followed by 30% in caries and endodontic problems. 2. DMFT index woman appeared the man the age when will increase more highly recording where highly and considered statistically. 3. According to the result from questionnaire, 48% of patients wearing removable prosthesis and 43% with fixed prosthesis were not satisfied with existing prosthesis. Thirty-seven percentages of patients were not satisfied with aesthetics and unable to chew food properly. 4. Thirty-nine percentage of patients were wearing removable prosthesis. More complete dentures were found on maxilla and partial dentures on mandible. 5. Seventy-seven percentage of patients requested for new prosthesis and the majority of these patients had complaints of difficulties in chewing and discomfort.

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Power Distribution Network Modeling using Block-based Approach

  • Chew, Li Wern
    • Journal of the Microelectronics and Packaging Society
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    • v.20 no.4
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    • pp.75-79
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    • 2013
  • A power distribution network (PDN) is a network that provides connection between the voltage source supply and the power/ground terminals of a microprocessor chip. It consists of a voltage regulator module, a printed circuit board, a package substrate, a microprocessor chip as well as decoupling capacitors. For power integrity analysis, the board and package layouts have to be transformed into an electrical network of resistor, inductor and capacitor components which may be expressed using the S-parameters models. This modeling process generally takes from several hours up to a few days for a complete board or package layout. When the board and package layouts change, they need to be re-extracted and the S-parameters models also need to be re-generated for power integrity assessment. This not only consumes a lot of resources such as time and manpower, the task of PDN modeling is also tedious and mundane. In this paper, a block-based PDN modeling is proposed. Here, the board or package layout is partitioned into sub-blocks and each of them is modeled independently. In the event of a change in power rails routing, only the affected sub-blocks will be reextracted and re-modeled. Simulation results show that the proposed block-based PDN modeling not only can save at least 75% of processing time but it can, at the same time, keep the modeling accuracy on par with the traditional PDN modeling methodology.

ORAL STATUS OF GERIATRIC PATIENTS, AND THEIR DEMAND AND SATISFACTION IN PROSTHODONTIC TREATMENT (노인환자의 구강상태, 치료요구도와 만족도)

  • Chung Moon-Kyu;Lee Chul-Young;Chang Hyuk-Jin
    • The Journal of Korean Academy of Prosthodontics
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    • v.39 no.4
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    • pp.323-335
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    • 2001
  • In this study 240 geriatric patients, aged 60 year and over were evaluated using a questionnaire and oral examination for their oral status, demand and satisfaction of prosthodontic treatment. The followings are the findings : 1. The single main complaint was regarding from the existing removable prosthesis, When the complaints were categorized into larger groups, complaints regarding existing prosthesis were 32% and followed by 30% in caries and endodontic problems. 2. Approximately half of the geriatric patients had 21 or more remaining dentition. This number however diminished with increase in age of the surveyed patient. 3. According to the result from questionnaire, 48% of patients wearing removable prosthesis and 43% with fixed prosthesis were not satisfied with existing prosthesis. Thirty-seven percentages of patients were not satisfied with aesthetics and unable to chew food properly. 4. Seventy-seven percentages of patients requested for new prosthesis and the majority of these patients had complaints of difficulties in chewing and discomfort. 5. Thirty-nine percentages of patients were wearing removable prosthesis. More complete dentures were found on maxilla and partial dentures on mandible.

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Perception and Preference of Korean Gruel among Housewives (중년 주부들의 죽에 대한 인식 및 기호도 조사)

  • Nam, Hae-Won;Pyun, Jin-Won;Hyun, Young-Hee
    • The Korean Journal of Food And Nutrition
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    • v.22 no.3
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    • pp.463-469
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    • 2009
  • This study was carried out to investigate the perception and preference of the Korean gruels. The survey was conducted among housewives living in Seoul and Gyeonggi province using a questionnaire during September 2008. The responses of 313 housewives were analyzed by SPSS program. The results were as follows. The gruel served as a dainty or therapeutic diet. Among the subjects, 37.2% liked gruel because of 'special treat' or 'easy to digest', The reason of dislike of gruel was absence of chew or cumbersome cooking. They usually cooked gruel at home, and considered that goods on the market were expensive or unsanitary. The highly perceptive gruel was Potjook, Dakjook, Hobakjook. Jeonbokjook, Hobakjook, Dakjook were mostly preferred in order. Socio-demographic factors didn't affect the awareness of gruel, but there were significant correlations between the preference of gruel and the state of employment or monthly income. It is necessary to develop various and convenient to cook gruels to be consumed, riding on the trend of well-being and slow-food.

Validity and Reliability of the Fagerstrom Test for Cigarette Dependence in a Sample of Arabic Speaking UK-Resident Yemeni Khat Chewers

  • Kassim, Saba;Salam, Mohamed;Croucher, Ray
    • Asian Pacific Journal of Cancer Prevention
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    • v.13 no.4
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    • pp.1285-1288
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    • 2012
  • Background: The Fagerstrom Test for Cigarette Dependence (FTCD) (formally FTND) is widely used for measuring physical dependence on nicotine. Objective: To explore the cross cultural validity and reliability of FTCD amongst Arabic speaker cigarette consumers who chew khat leaf, a stimulant green leaf. Methods: The psychometric properties of the FTCD were assessed in a subsample (91regular cigarette smokers) of purposively selected 204 UK-resident Yemeni khat chewers recruited during random visits to khat sale outlets. Data were collected via a structured face-to-face interview. Data analyses included descriptive tests and factor analysis. Results: Two factors were obtained by a principle axis factor analysis and these were termed as urgency of restoring the level of nicotine after abstinence during sleeping and maintaining the level of nicotine during waking. The internal reliability (Cronbach's alpha coefficient) of the whole FTCD is low (.68) as well as for the two subscales (.60) and (.62) respectively. Conclusion: The psychometric properties of the Arabic version of the FTCD scale in this sample of Yemeni khat chewers who smoked regularly confirmed what has been established in other cultural settings. The findings of this study have yet to be cross validated amongst other appropriately representative sample of Arabic speakers.

Two-Blade Guillotine Technique for Nipple Graft Harvest

  • Wong, Allen Wei-Jiat;Chew, Khong-Yik;Tan, Bien-Keem
    • Archives of Plastic Surgery
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    • v.44 no.5
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    • pp.449-452
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    • 2017
  • The nipple-sharing technique for nipple reconstruction offers excellent tissue matching. The method used for nipple graft harvesting determines the quality of the graft and hence, the success of nipple sharing. Here, we described a guillotine technique wherein the nipple is first transfixed with 2 straight needles to stabilise it. Two No. 11 blades are then inserted in the center and simultaneously swept outwards to amputate the distal portion of the nipple. This technique provides good control, resulting in a very evenly cut base. The recipient bed is deepithelialized thinly, and the nipple graft is inset with interrupted 8-0 nylon sutures under magnification. Being a composite graft, it is protected with splint dressings for 6 weeks, and the dressing is regularly changed by the surgeon. The height of the nipple grafts ranges from 4 to 8 mm. This technique was performed in 9 patients with an average follow-up of 2.9 years (range, 1-4.5 years). Apposition between the nipple graft and its bed is crucial for the success of this technique. When correctly applied, we observed rapid revascularization of the graft.

The Relationship between Chewing Ability and Health Status in the Urban Elderly who Resides in the House (도시 재택노인의 저작능력과 건강상태와의 관련성)

  • Bae, Yoon-Ho;Lee, Hee-Kyung
    • Journal of Yeungnam Medical Science
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    • v.21 no.1
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    • pp.51-59
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    • 2004
  • Background: The objective of this study is to evaluate the relationship between chewing ability and health status in order to provide basic information for the development of program which may lead to an improvement of a the elderly health status in urban areas. Materials and methods: The subjects of this study were 128 elderly urban female over the age of 65 who reside at house. The data were collected from May 21 to August 20, 2001, through questionnaires about nutrient intake status, direct measurement of anthropometrics, and oral examinations. Results: In terms of remaining teeth, there was significant negative relationship between age and number of remained teeth. The average number of remained teeth our subjects was $13.1{\pm}10.6$. About sixty five percent of the subjects were denture users (partial or full dentures) and there was positive relationship between age and the percentage of denture user. There was a significant negative correlation between age and chewing ability. The group that was able to chew had more remained teeth than the other group. Conclusion: This study suggests that there is strong positive relationship between chewing ability (remaining teeth) and elderly health status in urban areas, and the importance of preserving original teeth to improve the elderly health status in the public health program.

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