• 제목/요약/키워드: Body Pressure

검색결과 2,806건 처리시간 0.035초

Evaluation of Comfortable Improvement of the Tractor Seatbelt

  • Kim, Kwan-Woo;Kim, Hyuk-Joo;Park, Keun-Sang
    • 대한인간공학회지
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    • 제30권4호
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    • pp.495-501
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    • 2011
  • The objective of this study was to evaluate the convenience of the tractor seatbelt. We selected four healthy men as subjects. We measured their body pressure and examined the comfort of the seatbelt, while driving 50m on three different types of agricultural road with two types of seatbelts: automatic and manual. As results, when they used manual seatbelt, subjective uncomfortable rate was much higher than the automatic seatbelt on all types of road. Especially, body pressure was undistributed while using manual seatbelt on rough road.

인두 및 상부식도부 이물감 환자의 식도내 (Esophageal manometry in the patients with foreign body sensation on the pharyngo-esopgageal region)

  • 한승세
    • Journal of Chest Surgery
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    • 제17권2호
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    • pp.280-285
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    • 1984
  • Although it is suspected that the foreign body sensation on the pharyngoesophageal region is caused by motility disturbance of upper esophageal sphincter, its pathophysiology is not yet clear. Esophageal manometry has become an important diagnostic tool in the evaluation of esophageal motor disorders such as dysfunction of upper esophageal sphincter. Intraluminal esophageal pressures were measured by perfusion manometry in fifteen patients with foreign body sensation on the pharyngoesophageal region and in twenty six controls. In upper esophageal sphincter, mean value of resting pressure of the patients by rapid pull-through technique was 45,9\ulcorner 15.6mmHg and 80.9\ulcorner9.7mmHg in the controls. The difference between the two groups was statistically significant. The distance from nostril to sphincter, length of sphincter, and resting pressure by station pull-through technique were not significantly different. The amplitude of esophageal peristalsis in the patients was reduced significantly at the level of the upper, mid and lower esophagus. The wave duration of the patients was reduced significantly at the level the upper and mid esophagus. The speed showed no difference between two groups. Length and resting pressure of lower esophageal sphincter revealed almost same values in two groups.

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역경계요소법에 근거한 근접 음향 홀로그래피에서 강체 산란체의 이용 (Use of Rigid Scattering Body in the use of NAH based on the inverse BEM)

  • 김성일;정지훈;이정권
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2004년도 춘계학술대회논문집
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    • pp.486-489
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    • 2004
  • The NAH based on the inverse BEM is used to reconstruct the source field, which is advantageous in dealing with the irregular source. In the implementation of this technique, a large number of pressure measurements is required because an over-determined pressure data set is required. These conditions accordingly cause the increase of measurement time and associated effort along with the error due to mal-positioning. The purpose of this study is to reduce such inconveniences: Instead of increasing the number of field pressure data, the number of transfer paths between the source and the receiver is increased by placing rigid scattering body in-between the source and receiver. For validating the usefulness and effectiveness of the method, the numerical analyses of interior problem are demonstrated. As a result, it is thought that the proposed method enables the measurement at smaller number of sensor positions and the monitoring of surface vibration with less experimental effects than before.

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21/4Cr-1Mo강 압력용기 Nozzle 용접이음부의 재열균열에 관한 연구 (A Study on the Reheat Crack around Welded Joint of Pressusre Vessel with 21/4Cr-1Mo Steel)

  • 방한서;김종명
    • Journal of Welding and Joining
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    • 제18권2호
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    • pp.227-227
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    • 2000
  • Pressure vessels usually consist of main body and pipes which are connected with the main body. And as joining method of such main body and pipes, welding is carried out. After welding, welding residual stresses inevitably occur around welded joints. As residual stresses act harmfully on fatigue strength, corrosion and buckling strength of structure, PWHT is carried out for the purpose of removing the residual stress. But, during PWHT process, 2 ¼Cr-1Mo steels are frequently apt to generate reheat crack. For this reason, it is strongly needed to analyze and examine the mechanical behavior of welded joints before and after PWHT process. So, in this study, welded nozzle parts of pressure vessel where reheat cracks frequently occur are selected for examining the mechanism of crack-occurrence. (Received December 2, 1999)

Flow-induced interior noise from a turbulent boundary layer of a towed body

  • Abshagen, J.;Kuter, D.;Nejedl, V.
    • Advances in aircraft and spacecraft science
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    • 제3권3호
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    • pp.259-269
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    • 2016
  • In this work results from an underwater experiment on flow-induced noise in the interior of a towed body generated from a surrounding turbulent boundary layer are presented. The measurements were performed with a towed body under open sea conditions at towing depths below 100 m and towing speeds ranging from 2.4 m/s to 6.2 m/s (4 kn to 12 kn). Focus is given in the experiments to the relation between (outer) wall pressure fluctuations and the (inner) hydroacoustic near-field on the reverse side of a flat plate. The plate configuration consists of a sandwich structure with an (thick) outer polyurethane layer supported by an inner thin layer from fibre-reinforced plastics. Parameters of the turbulent boundary layer are estimated in order to analyse scaling relations of wall-pressure fluctuations, interior hydroacoustic noise, and the reduction of pressure fluctuations through the plate.

Impedance Fat Meter로 측정한 체지방 비율과 혈청 지질치 및 혈압과의 관련성 (Relationship of Body Fat Percent with Serum Lipid Level and Blood Pressure in Adults)

  • 이석환;황태윤;김창윤
    • Journal of Preventive Medicine and Public Health
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    • 제28권4호
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    • pp.783-794
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    • 1995
  • 영남대학교 의과대학 부속병원 종합건강진단센터에서 1994년 5월 20일부터 9월 30일까지 종합건강진단을 받은 성인 661명(남 472명, 여 189명)을 대상으로 이들의 신장, 체중, 혈청지질치(총 콜레스테롤, 중성지방, 고밀도 지단백), 혈압과 impedance를 측정하였고, 이들 측정치를 이용하여 체질량지수, Katsura 지수, 동맥경화지수, 저밀도 지단백, 체지방 비율을 산출하여 체지방 비율과 혈청 지질치 및 혈압과의 관련성을 규명하였다. 체지방 비율에 따른 분포는 남자의 경우 체지방 비율이 20% 이상인 제1군이 15명(3.2%), 여자의 경우 25% 이상인 제 1군이 7명 (3.7%)으로 나타났다. 체중은 남자와 여자에서 체지방 비율에 따라 유의한 차이가 있었으나(p<0.01)신장은 세 군간에 유의한 차이가 없었다. 남자에서는 총 콜레스테롤치, 중성지방치, 고밀도 지단백, 저밀도 저단백, 동맥경화지수가 세군간에 유의한 차이가 있었고(p<0.01) 여자에서는 총 콜레스테롤과 저밀도 지단백은 세 군간에 유의한 차이가 있었으나(p<0.05) 중성지방치, 고밀도 지단백은 세 군간에 차이가 없었다. 체질량지수와 Katsura 지수는 남녀 모두에서 세 군간에 유의한 차이가 있는 것으로 나타났다(p<0.01). 상관관계분석에서는 체지방 비율이 남자에서는 체중, 체질량지수, Katsura 지수, 총 콜레스테롤, 중성지방, 저밀도 지단백, 동맥경화지수, 수축기 및 확장기 혈압과 유의한 상관관계가 있었고 고밀도 지단백과는 유의한 역상관관계가 있었다. 여자에서는 체지방 비율이 나이, 신장, 체중, 체질량지수, Katsura 지수, 총 콜레스테롤, 중성지방, 저밀도 지단백, 동맥경화지수와 유의한 상관관계가 있었고 고밀도 지단백과는 유의한 역상관관계가 있었으나 혈압과는 유의한 상관관계가 없었다. 심혈관계질환의 위험인자인 총 콜레스테롤과 LDL/HDL비를 종속변수로 하고 나이, 체질량지수, 체지방 비율을 독립변수로 한 다중회귀분석에서 총 콜레스테롤의 경우 남자에서는 체지방 비율, 나이, 체질량지수 모두가 총 콜레스테롤에 유의한 영향을 미치는 변수로 나왔으며$(R^2=0.1286)$, 여자에서는 체지방 비율과 나이가 유의한 영향을 미치는 변수였다$(R^2=0.3399)$. LDL/HDL비의 경우는 남자에서 체질량지수만이 유의한 영향을 미치는 변수였고$(R^2=0.0954)$, 여자에서는 체지방 비율, 나이, 체질량지수 모두가 유의한 영향을 미치는 변수였다$(R^2=0.3164)$. 수축기 및 확장기 혈압을 종속변수로 한 다중회귀 분석에서는 남자에서는 수축기 혈압에 나이, 저밀도 지단백, 총 콜레스테롤이 유의한 영향을 미치는 변수였고$(R^2=0.1297)$, 확장기 혈압에는 나이만이 유의한 영향을 미치는 변수였다$(R^2=0.0972)$. 여자에서는 수측기 혈압에 나이와 총 콜레스테롤이 유의한 영향을 미치는 변수였고$(R^2=0.1705)$, 확장기 혈압에는 나이만이 유의한 영향을 미치는 변수였다$(R^2=0.1218)$. 이상의 결과에서 체지방 비율은 비만이나 혈청 지질치는 잘 반영한다고 생각할 수 있으나 혈압을 반영하는데는 미흡한 점이 있다고 생각되며 앞으로 체지방 비율과 혈청 지질치 및 혈압과의 관련성을 확립하기 위해서는 본 연구에서 고려하지 않은 혈압에 미치는 다른 요인들을 독립변수로 고려한 추가 보완 연구가 필요할 것으로 생각된다.

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슬랙스 동작 적합성 평가의 정량적 평가 기준 설정 (Establishing Quantitative Evaluation Standards for the Mobility test of Slacks)

  • 김선영;남윤자
    • 한국의류산업학회지
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    • 제18권1호
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    • pp.80-90
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    • 2016
  • This study presents quantitative evaluation standards for they mobility test, conducted in the process of a slacks fit test. This study quantified the subjects' evaluation on the wearability of slacks to provide objective qualitative evaluation methods for existing mobility tests. The subjects were women of standard bodytype between the ages of 18 and 24 wearing slacks designed to test their mobility based on differences in ease in waist girth, hip girth, crotch length and knee length. A qualitative evaluation tested the wearability of slacks. Clothing pressure and gap area between the body and slacks were measured based on a quantitative evaluation. The clothing pressure and the gap area between the body and slacks (which reflect the results of the wearability test) were presented in this study as quantitative evaluation standards. Clothing pressure tended to increase as the ease of slacks decreased; however, clothing pressure standards, that induce discomfort, differed by body parts. The hip, crotch, and knee area were relatively less sensitive despite the waist and the abdominal area sensitivity to clothing pressure. This study suggests the minimum ease for the appropriate wearing comfort of slacks by region and motion as standards for the quantitative evaluation of mobility tests. These was reset in accordance to the limits of clothing pressure when the minimum ease was considered as wearable but exceeded the clothing pressure limits.

파운데이션 착용으로 인한 의복압과 주관적 감각의 비교 평가 (Comparative Evaluation of Clothing Pressure and Subjective Sensation Exerted by Foundation)

  • 정정림;김희은
    • 한국의류학회지
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    • 제30권11호
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    • pp.1531-1537
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    • 2006
  • This study was conducted to investigate the relation between clothing pressure and subjective sensation exerted by foundation. Nineteen females volunteered as subjects. Experimental foundations were brassiere with 70B, 70C, 75B and 75C size which were widely distributed in pilot test and two types of girdle of which size were 64, 70 and 76. Clothing pressure with an air pack system and subjective sensation were measured at 5 points in brassiere and 7 points in the girdle. As the result of this study, brassiere's band and girdle's waist line, of which clothing pressure are high, is needed to improve. Generally the more pressure makes the more tightness, however, in some regions more or less pressure can give comfort. The tightness rating may not only related to clothing pressure, but also related to factors such as body size, body fat, resilience of muscle and bone structure. Other subjective sensation such as tactile feeling, hot/wet feeling, etc. in addition to the study with consideration of these factors could be used in future research to evaluate the effectiveness of foundation.

풍압력을 받는 철도차량의 전복 안전에 관한 이론 해석 (Theoretical Analysis on Overturn Safety of Train affected by Wind Pressure)

  • 남성원
    • 한국철도학회논문집
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    • 제15권6호
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    • pp.537-542
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    • 2012
  • 철도차량은 자연 강풍 뿐만 아니라 두 열차의 교행으로 인한 교행 풍압도 동시에 받는 경우가 종종 발생하며, 이러한 풍압에 의하여 철도차량의 주행 안정성이 저해될 뿐만아니라 전복의 원인이 되기도 한다. 또한, 해외에서는 강력한 돌풍에 의하여 철도차량이 전복되는 실제 사고 사례가 종종 보고되기도 한다. 따라서, 대부분의 국가에서는 풍속에 대한 차량 운전 규제를 통하여 안전성을 확보하고 있다. 본 연구에서는 다물체 모델에 기초한 철도차량의 전복안전성 이론식을 개발하였으며, 이를 강체모델의 결과와 비교하였다. 후자에서는 대차 및 차체를 별도의 자유도를 가진 것으로 간주하였다. 다물체 모델은 윤중 감소율을 평가하는데 사용 되어온 상용 프로그램을 이용한 기존의 방법을 대체하여 해석할 수 있음을 알 수 있다.

대구지역 성인여성의 영양섭취 상태와 혈청지질에 관한 연구 (Studies of Nutrent Intake and Serum Lipids Level in Adult Women in Taegu)

  • 최미자
    • Journal of Nutrition and Health
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    • 제31권4호
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    • pp.777-786
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    • 1998
  • The purpose of this study to investigate the relationship between nutrient intake and serum lipid levels in 165 healthy women in Taegu. A convenient method was to assess nutritional intake. Anthropometric measurement of body weight and height were measured and average energy expenditure calculated . The mean body mass index (BMI) was 23.4$\pm$3.1 and it was higher than the mean BMI of Korean women. Obesity rates for the study subjects were 15.7% by RBW (relative body weight : >120%) and 28.5% by BMI(body mass index) ; >25). Daily energy intake was sufficient at 106% of recommended dietary allowances and the energy percentage ration of carbohydrate , fat and protein was 68 : 18 : 14. Mean intake of vitamin A, B1 , niacin , and Ca were higher than RDA. The incidence of hypertension(>140mmHg) and hypercholoesterolemia(>240mg/dl) as 18.2% and 23.6% of the subjects, respectively . Postmenopasusal women showed significantly higher blood pressure, RBW, and ALP (alkaline phosphatase) than premenopausal women. The concentration of cholesterol and average blood pressure in the irregular meal eater group were significantly higher than in the regular meal eater group. Skipping meals and unenvendurnal distribution(no breakfast, or no lunch , and large evening meals) are associated with high total cholesterol level in this population . Especially, the atherogenic index was significantly lower in the regular meal eater group than that in irregular meal eaters. The values for serum cholesterol, triglyceride, blood pressure, BMI, and atherogenic index increased with age in middle-aged women. There was a highly significant correlation between body weight and plasma lipids. HDL -cholesterol was inversely correlated with BMI. The above dta provides valuable information for community program planning and health providers who work with individual female and adults to meet their nutrietional needs to control blood lipids.

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