• 제목/요약/키워드: Hand pressure

검색결과 12건 처리시간 0.091초

Extravasation Injury and Pressure Sore in Brain Damage Patient with Stiffness of the Limbs

  • Jung, Kyu Hwa;Choi, Hwan Jun;Kim, Jun Hyuk
    • Archives of Reconstructive Microsurgery
    • /
    • 제23권1호
    • /
    • pp.36-39
    • /
    • 2014
  • Extravasation injury refers to leakage of corrosive liquids from veins, resulting in tissue damage. The authors report on a case of extravasation injury to the left hand after administration of fluid to the antecubital area in a patient with brain damage. In order to minimize the effects of extravasation injury, rapid diagnosis and management are needed. In patients with stiffness, pressure sores can develop requiring more careful management by the medical staff.

증기표의 과열, 포화 및 압축영역의 신경회로망 모델링 (Neural Network Modeling for the Superheated, Saturated and Compressed Region of Steam Table)

  • 이태환;박진현
    • 한국기계기술학회지
    • /
    • 제20권6호
    • /
    • pp.872-878
    • /
    • 2018
  • Steam tables including superheated, saturated and compressed region were simultaneously modeled using the neural networks. Pressure and temperature were used as two inputs for superheated and compressed region. On the other hand Pressure and dryness fraction were two inputs for saturated region. The outputs were specific volume, specific enthalpy and specific entropy. The neural network model were compared with the linear interpolation model in terms of the percentage relative errors. The criterion of judgement was selected with the percentage relative error of 1%. In conclusion the neural networks showed better results than the interpolation method for all data of superheated and compressed region and specific volume of saturated region, but similar for specific enthalpy and entropy of saturated region.

Prevention of Work-related Musculoskeletal Disorders in Grapes Pinching by Using Electro-motion Scissors Designed Ergonomically

  • Chae, Hye-Seon;Kim, Sung-Cheol;Kim, Kwan-Woo;Lee, Kyung-Suk;Kim, Hoy-Cher;Park, Keun-Sang
    • 대한인간공학회지
    • /
    • 제30권6호
    • /
    • pp.749-755
    • /
    • 2011
  • Objective: The purpose of this study is to assess the reducing effect of workload on developed electro-motion scissors. Methods: To achieve this, we measured the pressure distribution, Joint angle of fingers and JSI(Job Strain Index) for electro-motion scissors and hand-operated scissor in objective assessment and surveyed the uncomfortable degree in subjective assessment. Results: As a result, The peak of pressure in the electro-motion scissors was generally lower than the hand-operated scissors. JSI and overall joint angle of fingers for the electro-motion scissors were remarkably lower than the hand-operated scissors. Also, the subjective uncomfortable degree showed that the uncomfortable point of electro-motion scissors were generally lower than the hand operated scissors. Conclusion: The impact of reducing the work load as well as distributing the pressure around the hand by using electro-motion scissors during grapes pinching was confirmed.

제품특성과 구매패턴에 따른 uTradeHub 활용요인 연구 (An Empirical Study on the Factors Affecting the Participation of uTrade Hub in terms of Product Characteristics and Sourcing Patterns -Focused on the uTrade Search Services-)

  • 송선옥
    • 무역상무연구
    • /
    • 제49권
    • /
    • pp.461-490
    • /
    • 2011
  • The purpose of this study is to examine which factors are encouraging SMEs to participate in uTradeHub(focused on the uTrade search service) in terms of product characteristics and sourcing patterns. The three factors encouraging Trade e-Marketplaces are identified in this study. First, internal factors include the support of top management, mature of IT infrastructure. Second, external factors include the pressure of industry, industry competition, dependence of trading partners. Third perception factors are perceived Usefulness, perceived easy of use. The empirical analysis had the following results. First, it reveals that support of top management, mature of IT infrastructure, industry competition have significant influence upon uTrade Search Services. On the other hand, pressure of industry, dependence of trading partners, Perceived relative benefits are not significant variable of the participation in uTrade Search Services. Second, the factors affecting the participation in uTrade Search Services are differentiated in terms of product characteristics and sourcing patterns. And the support of top management, mature of IT infrastructure, Perceived relative benefits are emphasized very important factors affecting the participation of uTrade Search Services in SMEs. The industry competition is recognized as more important factor in horizontal market in which Spot sourcing just like Operating products is trading. On the other hands, the dependence of trading partners are significant factor in vertical market in which Systemic sourcing just like Manufacturing products is trading.

  • PDF

역전기투석 장치 내 스페이서의 영향에 관한 수치해석적 연구 (Numerical Analysis for the Effect of Spacer in Reverse Electrodialysis)

  • 신동우;김홍근;김태환;박종수;전동협
    • 청정기술
    • /
    • 제19권1호
    • /
    • pp.1-7
    • /
    • 2013
  • 본 연구에서는 역전기투석 장치 내 스페이서(spacer)에 의한 유동변화와 스페이서의 높이변화에 따른 해수의 유동 및 이온전달 영향에 관한 연구를 수행하였다. 육각형 모양의 스페이서에 대해 3차원 전산유체해석을 진행하였다. 모델링을 수행한 결과, 레이놀즈수(Reynolds number)가 커짐에 따라 스월량(swirl)이 커지며 단위시간당 해수의 이온이 멤브레인(membrane)으로 전달되는 양이 늘어나지만, 반면에 입출구의 압력차도 증가하였다. 또한 스페이서가 두꺼울수록 파워수(Power number)와 셔우드수(Sherwood number)가 증가하였다.

촉매 코팅 DPF의 soot loading과 유량 변화에 따른 압력강하 및 열전달에 관한 실험적 연구 (An Experimental Study on Effects of Soot Loading and Mass Flow Rate on Pressure Drop and Heat Transfer in Catalyzed Diesel Particulate Filter)

  • 조용석;노영창;박영준;김득상
    • 한국자동차공학회논문집
    • /
    • 제15권3호
    • /
    • pp.72-78
    • /
    • 2007
  • A diesel particulate filter causes progressive increase in back pressure of an exhaust system due to the loading of soot particles. To maintain the pressure drop caused by DPF under proper level, a regeneration process is mandatory when excessive loading of soot is detected in the filter. It is a major reason why the relation between the amount of soot and the pressure drop in a DPF becomes crucial. On the other hand, pressure drop varies with not only the soot loading but also conditions of exhaust gas such as mass flow rate. Therefore, the relation among them becomes complicated. Furthermore, the characteristics of heat transfer in a DPF is another crucial parameter in order for the filter to avoid thermal crack during regeneration period. This study presents characteristics of pressure drop under various conditions of soot loading and mass flow rate in catalyzed diesel particulate filter. This study also shows characteristics of heat transfer in DPF when high temperature gas flows into the filter. Experiments reveal that the soot loading and mass flow rate affect characteristics pressure drop independently. Experiments also indicate that the amount of coating material has little influence on pressure drop with changes in soot loading and mass flow rate. However, increased catalyst coating may lead to the improved heat transfer which is efficiency to reduce thermal stress of the filter.

대학생의 자아분화와 동적 집-나무-사람 그림 반응특성 연구 (Self-differentiation of University Students and their Responses to Kinetic House-Tree-Person Drawings)

  • 정윤정;최외선
    • 가정과삶의질연구
    • /
    • 제22권4호
    • /
    • pp.43-61
    • /
    • 2004
  • The purpose of this study was to verify the usefulness of kinetic House- Tree- Person drawing as a diagnostic measure for the degree of self-differentiation, which is an essential part of college students' development. Participants for the study were four hundred thirty five(272 male and 163 female) university freshmen enrolled in 4-year colleges located in Pusan. The Participants completed a scale of self-differentiation and a Kinetic House- Tree-Person drawings test. The evaluation system for kinetic House-Tree-Person drawings was established based on the indexes of Buck(1948) and Bums(1972) and used exiting literatures as reference. The data were analyzed using means, standard deviations, t-test, one-way ANOVA, and Scheffe's test. The results obtained from the study are as follows: First, the mean level of college students' self-differentiation was 2.81, which is about average. Some significant gender differences were found in the areas of self-intergration, family projection, and emotional separation. Male students scored higher on self-intergration, whereas female students score higher on family projection and emotional separation. Second. self-differentiation was higher when the student drew a house with smoke coming out of the chimney, a single-story house with flat roof, or with detailed description of curtains, roof and roof tiles. Third, self-differentiation seemed to be higher when branches and fruits were included, when there was no expression of roots, when large crowns and branch openings were presented, and when no slant lines or base lines appeared. Forth, self-differentiation showed ㅁ higher level when the portrait shows eyes, mouth and neck without omission, when it included the whole body instead of face only, and when there was no person with just a profile, a back, or with a stiff posture, and when there was no weak and thin lines. Individuality also marked higher if a person was in motion and than one person was added. Finally, self-differentiation showed significant difference according to the overall harmony of the drawing, ordering of contents, hand pressure, the kind and shape of tree, and presence of other persons. The more harmonious the picture was, and the more family members are added, the higher the level of self-differentiation was.

Flow-induced pressure fluctuations of a moderate Reynolds number jet interacting with a tangential flat plate

  • Marco, Alessandro Di;Mancinelli, Matteo;Camussi, Roberto
    • Advances in aircraft and spacecraft science
    • /
    • 제3권3호
    • /
    • pp.243-257
    • /
    • 2016
  • The increase of air traffic volume has brought an increasing amount of issues related to carbon and NOx emissions and noise pollution. Aircraft manufacturers are concentrating their efforts to develop technologies to increase aircraft efficiency and consequently to reduce pollutant discharge and noise emission. Ultra High By-Pass Ratio engine concepts provide reduction of fuel consumption and noise emission thanks to a decrease of the jet velocity exhausting from the engine nozzles. In order to keep same thrust, mass flow and therefore section of fan/nacelle diameter should be increased to compensate velocity reduction. Such feature will lead to close-coupled architectures for engine installation under the wing. A strong jet-wing interaction resulting in a change of turbulent mixing in the aeroacoustic field as well as noise enhancement due to reflection phenomena are therefore expected. On the other hand, pressure fluctuations on the wing as well as on the fuselage represent the forcing loads, which stress panels causing vibrations. Some of these vibrations are re-emitted in the aeroacoustic field as vibration noise, some of them are transmitted in the cockpit as interior noise. In the present work, the interaction between a jet and wing or fuselage is reproduced by a flat surface tangential to an incompressible jet at different radial distances from the nozzle axis. The change in the aerodynamic field due to the presence of the rigid plate was studied by hot wire anemometric measurements, which provided a characterization of mean and fluctuating velocity fields in the jet plume. Pressure fluctuations acting on the flat plate were studied by cavity-mounted microphones which provided point-wise measurements in stream-wise and spanwise directions. Statistical description of velocity and wall pressure fields are determined in terms of Fourier-domain quantities. Scaling laws for pressure auto-spectra and coherence functions are also presented.

화강풍화토 지반에 설치된 압력재주입 그라우팅 보강재의 인발특성 (Pullout Characteristics of Pressure Reinjection-Grouted Reinforcements in Decomposed Granite Soil)

  • 심용진;이종규;이봉직
    • 한국지반환경공학회 논문집
    • /
    • 제13권11호
    • /
    • pp.61-68
    • /
    • 2012
  • 지반보강을 위해 국내에서 널리 사용되고 있는 공법으로 앵커공법, 소일네일 공법 및 소구경말뚝 공법 등을 들 수 있다. 상기 공법의 경우 보강재의 시공은 용도에 따라 구분되지만 공통적으로 보강재를 삽입한 후에 그라우팅 작업을 실시하는 공정이 포함되어 있다. 지금까지는 국내 대부분의 경우 중력식 그라우팅으로 시공되고 있지만 중력에 의해 그라우팅을 실시하기 때문에 천공 시 발생하는 지반이완영역에 대한 복원이 명확지 않아 보강재의 구조적 결함을 유발할 우려가 있다. 반면에 압력재주입 그라우팅은 먼저 그라우트를 채운 후 소정의 시간이 지나고 미리 설치한 튜브를 통하여 추가적으로 재주입하는 방식으로 기존의 그라우팅 방식에서 발생할 수 있는 문제를 상당부분 해결할 수 있어 그라우팅의 품질을 향상할 수 있다. 본 연구에서는 그라우팅 방식에 따른 인발특성을 평가하기 위하여 화강풍화토 지반을 대상으로 모형실험을 실시하였으며, 그라우팅방법에 따른 인발력 변화와 압력 재주입그라우팅의 재주입시기와 재주입압에 따른 보강재 지지력 증대 특성을 평가하고자 하였다. 연구결과 압력재주입식 그라우팅이 중력식그라우팅에 비해 최소 1.1배에서 1.3배까지 인발력이 크게 발휘되는 것을 확인하였으며, 압력재주입식 그라우팅의 적정 물시멘트비, 주입압력 및 재주입시기에 대한 고찰결과를 제시하였다.