• Title/Summary/Keyword: MA-TAH

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A Study on the Practical Estimation of Nonlinear Hemodynamic Variables for the Moving-Actuator type Total Artificial Heart (인공심장의 비선형 혈류 역학 변수 예측에 관한 연구)

  • 엄경식;안재목
    • Journal of Biomedical Engineering Research
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    • v.19 no.2
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    • pp.153-162
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    • 1998
  • It is needless to say that the nonlinear hemodynamic variables estimation is a very important study for the artificial heart. Even though it is important, there have not been satisfactory results which can be applied to the real world situations, In this paper, the problem of hemodynamic variables estimation for the moving-actuator type total artificial heart(MA-TAH) was studed. Multidimensional linear interpolation(MDI)scheme was used for the estimation. Proposed method was verified by in vitro test and showed good performance.

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The Supervisory Control System in a Moving-Actuator type Total Artificial Heart: Thought and Progress

  • Om, K.S.;Ahn, J.M.;Lee, J.H.;Choi, J.H.;Kim, W.E.;Kim, H.C.;Min, B.G.
    • Proceedings of the KOSOMBE Conference
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    • v.1997 no.05
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    • pp.55-58
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    • 1997
  • In this paper we reviewed and stated the present state of our team's research of the moving-actuator type total artificial heart (MA-TAH). Especially, this paper showed new direction of researches. The integrated research of battery, telemetry, TET is required. And the real-time supervisory of the state of hemodynamic variables and MA-TAH is also needed. These requirement made us to think the supervisory control system (SCS). As functional abilities of the SCS require very high computational cost, the digital signal processor is an appropriate choice for our need.

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New Challenge of the CPU for a Moving-Actuator type Total Artificial Heart

  • Yi, S.W.;Ahn, J.M.;Park, S.K.;Om, K.S.;Jo, Y.H.;Choi, J.S.;Lee, J.H.;Choi, J.H.;Kim, W.E.;Choi, S.W.;Kim, H.C.;Min, B.G.
    • Proceedings of the KOSOMBE Conference
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    • v.1997 no.11
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    • pp.118-120
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    • 1997
  • Intel's 80C196KD has been applied at the moving-actuator type total artificial heart ( MA-TAH ) from about early 1990th at our laboratory and it fulfilled its role successively. But the increased need of higher performance brought the other-type of the CPU, and the new challenge of ASIC to the application to the MA-TAH accelerated its need. So the new concept of the utilization of the DSP based CPU to the motor control was surveyed and analyzed deeply or about ew months and the results were introduced and summarized in this paper.

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Can We Estimate the LAP, RAP, PAP, AoP and CO from the Interventricular Pressure and Motor Current in a Moving- Actuator type Total Artificial Heart? Yes, We Can

  • Om, K.S.;Ahn, J.M.;Park, S.K.;Jo, Y.H.;Choi, W.W.;Choi, J.S.;Kim, H.C.;Min, B.G.
    • Proceedings of the KOSOMBE Conference
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    • v.1997 no.05
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    • pp.59-63
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    • 1997
  • It is needless to say that the hemodynamic variables estimation is a very important study for the artificial heart. Even though its importance there have not been satisfactory results which can be applied to the real-world situations. This paper surveys and recommends how to cope with the problem of hemodynamic variable estimation for the moving-actuator type total artificial heart (MA-TAH).

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Effect of Non-Perforated Breathable Films on the Storability of Sprout Vegetables in Modified Atmosphere Condition (레이저 가공 비천공 Breathable필름이 새싹채소의 Modified Atmosphere 저장에 미치는 영향)

  • Choi, In-Lee;Baek, Jun Pill;Kang, Ho-Min
    • Journal of Bio-Environment Control
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    • v.22 no.2
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    • pp.167-174
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    • 2013
  • Six kinds of sprout vegetables were applied three and six types of non-perforated breathable propylene films (NPB film) for individual and mixed modified atmosphere (MA) package condition at $10^{\circ}C$ on this study. As a tah tasai, kohlrabi, rape, chinese cabbage, red radish, broccoli sprouts were packaged by 20,000, 60,000, and 100,000 $cc{\cdot}m^{-2}{\cdot}day{\cdot}atm$ non-perforated breathable films for seven days storage. Mixed sprout vegetables were used 20,000 cc, 40,000 cc, 60,000 cc, 80,000 cc, and 100,000 $cc{\cdot}m^{-2}{\cdot}day{\cdot}atm$ non-perforated breathable films for seven days storage. Loss rate of fresh weight, changes of carbon dioxide, oxygen, and ethylene gas concentration were measured during the storage. Visual quality and off-flavor were rated by panel tests after seven days storage. Each sprout vegetable storage with film tests had been shown under the 0.5% fresh weight loss in every packaged films, and the 20,000cc NPB film package had been suitable atmosphere condition in the carbon dioxide and oxygen gas concentration. Appearance and off-odor of sprouts packaged with 20,000cc NPB film were shown better than other films because of the proper gas movement through the film to outside during the storage. Fresh weight loss of the mixed sprout vegetables had no difference among the NPB films for seven days storage. The 20,000 cc film had been resulted in that exchange rate of carbon dioxide and oxygen was highest cause of low film permeability than sprouts respiration. But the film is not good for storage because it has been made poor value of off-order even showed high visual quality from panel test after storage. 40,000 cc and 60,000 cc non-perforated breathable films were more suitable for mixed sprout vegetable storage at $10^{\circ}C$. These result suggested that 20,000 cc NPB film was good for single packaged sprout vegetable and 40,000 cc and 60,000 cc non-perforated breathable films were good for mixed packaged sprout vegetable.