• Title/Summary/Keyword: Hand pressure

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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
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    • v.23 no.1
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    • pp.36-39
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    • 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.

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
    • Journal of the Ergonomics Society of Korea
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    • v.30 no.6
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    • pp.749-755
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    • 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.

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- (제품특성과 구매패턴에 따른 uTradeHub 활용요인 연구)

  • Song, Sun-Yok
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.49
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    • pp.461-490
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    • 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.

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

  • Shin, Dong-Woo;Kim, Hong-Keun;Kim, Tae-Hwan;Park, Jong-Soo;Jeon, Dong Hyup
    • Clean Technology
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    • v.19 no.1
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    • pp.1-7
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    • 2013
  • In this study, the effects of spacer and variation of spacer height in reverse electrodialysis (RED) on the seawater and ion transport were investigated. A three-dimensional computational fluid dynamics (CFD) simulation for a hexagonal spacer was constructed. The results showed that the swirl in the channel and ion transport rate to the membrane were enhanced at higher Reynolds number, on the other hand, pressure difference between the inlet and outlet was increased. Moreover thicker spacer increased Power number and Sherwood number.

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

  • Cho, Yong-Seok;Noh, Young-Chang;Park, Young-Joon;Kim, Duk-Sang
    • Transactions of the Korean Society of Automotive Engineers
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    • v.15 no.3
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    • pp.72-78
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    • 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.

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

  • 정윤정;최외선
    • Journal of Families and Better Life
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    • v.22 no.4
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    • pp.43-61
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    • 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
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    • v.3 no.3
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    • pp.243-257
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    • 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.

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

  • Shim, Yong-Jin;Lee, Jong-Kyu;Lee, Bong-Jik
    • Journal of the Korean GEO-environmental Society
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    • v.13 no.11
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    • pp.61-68
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    • 2012
  • Most widely methods for reinforcement of soil utilized in Korea are anchor method, soil nail method and micro pile method. These methods are classified by the intended use of the structure to be constructed, but the reinforcement of the ground is accomplished contains in common the process of grouting work after inserting the reinforcements. Domestically, gravity grouting has been used mostly so far, but there has always been the risk of insufficient restoration of the loose ground area from the drill holes because the grouting is conducted only by gravity. On the other hand, pressure reinjection grouting may enhance the grouting quality by solving the problem of the existing grouting method considerably since it additionally reinjects grouting through pre-installed tube a certain time after the first grouting. Accordingly, this study evaluated the pullout characteristics by the grouting methods by performing model test on decomposed granite soil, and investigated the support increasing characteristics of reinforcements depending on the curing time, reinjection pressure, and uplift force variation of the pressure reinjection grouting. The result of this research shows that the pressure reinjection grouting demonstrated 1.1~1.3 times of performance of the gravity grouting, and suggests some analysis on optimal water content, reinjection pressure and curing time of the pressure reinjection grouting.

Friction Factor in Micro Channel Flow with Electrochemical Reactions in Fuel Cell (전기화학반응을 수반한 유로채널 형상에 따른 마찰계수에 대한 연구)

  • Cho, Son-Ah;Lee, Pil-Hyong;Han, Sang-Seok;Choi, Seong-Hun;Hwang, Sang-Soon
    • Journal of the Korean Electrochemical Society
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    • v.10 no.4
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    • pp.245-251
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    • 2007
  • The performance of fuel cell is enhanced with increasing reaction surface. Narrow flow channels in flow plate cause increased pumping power. Therefore it is very important to consider the pressure drops in the flow channel of fuel cell. Previous research for pressure drop for micro channel of fuel cell was focused on effects of various configuration of flow channel without electrochemical reaction. It is very important to know pressure loss of micro flow channel with electrochemical reaction because fluid density in micro channel is changed due to chemical reaction. In this paper, it is investigated that the pressure drops in micro channel of various geometries at anode and cathode with electrochemical reaction and compared them to friction coefficient (fRe), velocity, pressure losses for corresponding non reacting flow channel. The results show that friction factors for cold flow channel could be used for parallel and bended flow channel for flow channel design of fuel cell. In the other hand, pressure drop for serpentine flow channel is the lowest among flow channels due to bypass flow across gas diffusion layer under reacting flow condition although its pressure drop is highest for cold flow condition.