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Wyszukujesz frazę "Jung, C." wg kryterium: Autor

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    Wyświetlanie 1-12 z 12
    Tytuł:
    A fuzzy controller with a real-time tuning algorithm and its application to a steam generator water level control
    Autorzy:
    Jung, C.
    Kwon, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/205893.pdf
    Data publikacji:
    1998
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    sterowanie rozmyte
    sterownik z logikami rozmytymi
    fuzzy controller
    instantaneous system performance
    scaling factor
    self-tuning
    steam generator
    Opis:
    It is nesessary to tune the fuzzy rules and the scalling factors in real-time control of a large scale system, the steam generator of a nuclear power plant, as it is related to safety and availability of the plant. A novel real-time tuning algorithm of fuzzy controller based on the scaling factors is proposed and applied to the steam generator water level control system of the nuclear power plant. The new real-time tuning algorithm adopts a variable reference tuning index for a good system tuning response and an instantaneous system fuzzy performance for scaling factor tuning. For the fuzzy steam generator controller, an image signal of feedwater flow error at low power is proposed and pressure compensation rules and a gain scheduler of feedwater temperature are designed also. The fuzzy controller of the steam generator water level is simulated by the proposed method. The simulation results show that the improved performance of the steam generator water level controller by the proposed method.
    Źródło:
    Control and Cybernetics; 1998, 27, 4; 545-564
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Laser Preheating AISI 4140 Specimens for Micro-Forging
    Autorzy:
    Jung, C.
    Lee, M. G.
    Jeon, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/351766.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    laser preheating
    micro-forging
    fatigue strength
    ultrasonic fatigue test
    hardness
    Opis:
    Many high performance and permanent service parts require suitable material characteristics-high fatigue strength is one of the most important characteristics. For this reason, surface treatment processes are essential to increase the material performance and avoid the use of costly ineffective material. There exist various surface treatment processes for various applications. Each process has advantages and disadvantages and hybridization can solve various problems. The micro-forging process delivers a controlled and uniform surface hardness, but the depth of the forged surface is limited. On the other hand, laser heat treatment can increase the hardness drastically, but the surface may become brittle, which reduces the fatigue life. Laser-assisted micro-forging is a novel hybrid process of laser heat treatment and micro-forging that has the potential to increase the forging depth and relax the stress caused by the high temperature of the forging process. This study examines the effect of laser preheating in the micro-forging of AISI 4140. The processes were varied as follows: no treatment, micro-forging only, and laser-assisted micro-forging. The fatigue strength of the specimens was examined by means of an ultrasonic fatigue tester and then compared. The microstructural changes were investigated with respect to the processes by using scanning electron microscopy. In conclusion, it was confirmed that the laser preheating auxiliary forging affects the fatigue life. It was confirmed that the fatigue life was the mostly increased in 550°C temperature laser preheating micro forging process and the temperature was identified as the most important factor.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2B; 1209-1213
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Flexion and Extension Angles of Resting Fingers and Wrist
    Autorzy:
    Lee, K.-S.
    Jung, M.- C.
    Powiązania:
    https://bibliotekanauki.pl/articles/90396.pdf
    Data publikacji:
    2014
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    finger
    wrist
    resting posture
    angle
    palce
    nadgarstek
    kąt zgięcia
    pozycja odpoczynku
    Opis:
    This study determined flexion and extension angles of resting fingers and wrist in terms of forearm posture (neutral, pronation and supination) and shoulder flexion (0°, 45°, 90° and 135°). The participants participated in 12 angle measurements for 16 finger joints and wrist. The finger joints flexed more in supination than in neutral posture and pronation and the thumb flexed more than the other fingers because of the gravity and skin tension. This phenomenon became more apparent as the shoulder flexed. The carpometacarpal joint had the largest flexion angle in the thumb joints, whereas the proximal interphalangeal joints had the largest flexion angles in the other finger joints. The resting posture of the wrist extended of ~16° in any forearm postures when the shoulder was at 0°. The results of this study could be useful for rehabilitation tool and product designs.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2014, 20, 1; 91-101
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Postural Evaluation in a Poultry Farm for Broiler Chickens
    Autorzy:
    Wang, H.
    Kong, Y. K.
    Jung, M. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/91121.pdf
    Data publikacji:
    2012
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    simultaneous posture
    individual posture
    body posture
    finger posture
    Opis:
    The goal of this study was to evaluate working postures in 9 operations of poultry farming for broiler chickens for 14 body segments with 4 categories, and for fingers with 14 categories. Overall, the farmers commonly bent almost all their body segments and used power grips. The operations of cleaning with water wand and inspecting chickens seemed light work because the farmers walked around most of their working time. The operations of detaching base from hanging feeder and attaching base to hanging feeder had the farmers continue squatting to handle the feeders close to the floor. The farmers also repeatedly bent their trunks in shoveling feces, unloading a box of chicks, and releasing chicks. A power grip was frequently observed due to using tools with round handles. Workplace design to raise working height would be necessary for a better working environment for broiler farmers.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2012, 18, 1; 67-75
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Plasmon Enhancement of Fluorescence in Single Light-Harvesting Complexes from em Amphidinium carterae
    Autorzy:
    Bujak, Ł.
    Piątkowski, D.
    Mackowski, S.
    Wörmke, S.
    Jung, C.
    Bräuchle, C.
    Agarwal, A.
    Kotov, N.
    Schulte, T.
    Hofmann, E.
    Brotosudarmo, T.
    Scheer, H.
    Govorov, A.
    Hiller, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807594.pdf
    Data publikacji:
    2009-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.80.Nj
    87.14.E-
    87.64.M-
    Opis:
    We show that single peridinin-chlorophyll a-protein light-harvesting complexes from dinoflagellate Amphidinium carterae placed near to silver nanoparticles show strongly enhanced fluorescence emission. Single molecule spectroscopy experiments performed at room temperature point toward an enhancement of more than an order of magnitude for optimal conditions. Irrespective of the enhancement, we observe no effect of the metal nanoparticle on the fluorescence emission energy of the complex. This result provides a way to control the optical properties of biomolecules via plasmon excitations in metal nanoparticles.
    Źródło:
    Acta Physica Polonica A; 2009, 116, S; S-22-S-25
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ergonomic Hand Tool and Desk and Chair Development Process
    Autorzy:
    Shin, D.
    Kim, J. Y.
    Hallbeck, M. S.
    Haight, J. M.
    Jung, M. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/89795.pdf
    Data publikacji:
    2008
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    ergonomics process
    hand tool
    desk and chair
    Opis:
    This paper suggests a practical and simple process consisting of 8 stages: needs assessment, ergonomics guidelines, anthropometry, brainstorming and idea sketch, preliminary model, drafting and rendering, working prototype, and user trials. The feasibility of this process was verified with the development of a modified clamping hand tool and a new student desk and chair. The case studies showed how design difficulties were overcome by integrating ergonomics guidelines in the process.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2008, 14, 2; 247-252
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation of Nickel Powders by Reduction of Nickel Hydroxide Using the Taylor Fluid Flow
    Autorzy:
    Park, I.-J.
    Kim, D.-W.
    Kim, G.-H.
    Chae, H.-J.
    Jung, H.-C.
    Powiązania:
    https://bibliotekanauki.pl/articles/355021.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Ni(OH)2
    nickel
    Taylor fluid flow
    fine powder
    Opis:
    In this study, Ni(OH)2 was synthesized by the continuous reaction by the Taylor fluid flow and compared with those prepared from the conventional batch type reaction. The nickel powders were synthesized by reduction of Ni(OH)2 in an aqueous solution with hydrazine hydrate acting as the reductant. And then the characteristics of the nickel powder according to the synthesis method were compared. The average particle size of the synthesized Ni(OH)2 using Taylor reactor was generally decreased about 1.5~2.5 times more than the batch reaction. The nickel powders prepared by the batch reaction highly agglomerated with non-uniform particles. In the Taylor reaction, the agglomeration of particles was broken and uniform nickel powder was produced.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 3; 1443-1447
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Noise Anisotropy in $YBa_2Cu_3O_{7-δ}$ Thin Films
    Autorzy:
    Jung, G.
    Camerlingo, C.
    Zilber, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1810289.pdf
    Data publikacji:
    2009-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.40.+k
    74.78.-w
    Opis:
    Anisotropy of voltage noise in $YBa_2Cu_3O_{7-δ}$ thin films was investigated using (103)/(013) oriented films. Normalized noise in the normal state does not depend on the direction of current flow, while in the superconducting state the noise is anisotropic. The difference stems from different origins of noise. Normal state noise is due to random motion of charge carriers while in the superconducting state it arises from fluctuations of density and/or velocity of flux vortices.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 1; 69-72
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of an Incentive-Based Obesity Management Program in a Workplace
    Autorzy:
    Hwang, G.
    Yoon, C.
    Jung, H.
    Kim, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/90493.pdf
    Data publikacji:
    2011
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    obesity
    workplace
    incentive
    BMI
    Opis:
    This study is to analyze the effectiveness of an incentive-based obesity management program (the Midas Project aimed to improve good health habits) at an electronics company in 2005. A total of 95 company participants with a high body mass index (BMI) were recruited for a health promotion program for 3 months that awarded gold medals as an incentive for body fat loss. BMI decreased from 28.8 to 27.8 kg/m² (p = .000), body weight decreased from 87.2 to 83.5 kg (p = .000), and body fat weight decreased from 25.4 to 23.3 kg (p = .000). Systolic and diastolic blood pressure decreased from 130.5 to 125.1 mmHg (p = .002), from 86.4 to 81.7 mmHg (p = .009). The percentage of participants exercising more than 3 times per week increased from 27.3 to 52.3% (p = .000). The percentage who avoided overeating at parties and midnight eating increased from 65.9 to 72.7% (p = .767) and 70.5 to 84.1% (p = .172), respectively. This incentive-based obesity management program was effective in improving not only BMI but also health status.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2011, 17, 2; 147-154
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bringing Kano’s perspective to AHP: the 2D-AHP decision model
    Autorzy:
    Jung, U.
    Yim, S.
    Lim, S.
    Kim, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/407247.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    analytic hierarchy process (AHP)
    Kano model
    hybrid model
    multicriteria decision making
    two dimension perspective
    Opis:
    AHP and the Kano model are such prevalent TQM tools that it may be surprising that a true hybrid decision-making model has so far eluded researchers. The quest for a hybrid approach is complicated by the differing output perspective of each model, namely discrete ranking (AHP) versus a multi-dimensional picture (Kano). This paper presents a hybrid model of AHP and Kano model, so called two-dimension AHP (2D-AHP). This paper first compares the two approaches and justifies a hybrid model based on a simple conceit drawn from the Kano perspective: given a decision hierarchy, child and parent elements can exhibit multi-dimension relationships under different circumstances. Based on this premise, the authors construct a hybrid two-dimension AHP model whereby a functionaldysfunctional question-pair technique is incorporated into a traditional AHP framework. Using the proposed hybrid model, this paper provides a practical test case of its implementation. The 2D-AHP approach revealed important evaluation variances obscured through AHP, while a survey study confirmed that the 2D-AHP approach is both feasible and preferred in some respects by respondents. Although there have been rich research efforts to combine AHP and Kano model, most of them is simply about a series of individual usage of each methodology. On the other hand, the type of hybridization between AHP and Kano model in this paper is quite unique in terms of the two dimensional perspective. The model provides a general approach with application possibilities far beyond the scope of the test case and its problem structure, and so calls for application and validation in new cases.
    Źródło:
    Management and Production Engineering Review; 2016, 7, 4; 16-26
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recovery Of Electrodic Powder From Spent Lithium Ion Batteries (LIBs)
    Odzysk proszku elektrodowego z zużytych akumulatorów litowo-jonowych
    Autorzy:
    Shin, S. M.
    Jung, G. J.
    Lee, W-J.
    Kang, C. Y.
    Wang, J. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/354084.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lithium ion battery
    electrodic powder
    cobalt
    lithium
    thermal treatment
    bateria litowo-jonowa
    proszek elektrodowy
    kobalt
    lit
    obróbka termiczna
    Opis:
    This study was focused on recycling process newly proposed to recover electrodic powder enriched in cobalt (Co) and lithium (Li) from spent lithium ion battery. In addition, this new process was designed to prevent explosion of batteries during thermal treatment under inert atmosphere. Spent lithium ion batteries (LIBs) were heated over the range of 300°C to 600°C for 2 hours and each component was completely separated inside reactor after experiment. Electrodic powder was successfully recovered from bulk components containing several pieces of metals through sieving operation. The electrodic powder obtained was examined by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), and atomic absorption spectroscopy (AA) and furthermore image of the powder was taken by scanning electron microscopy (SEM). It was finally found that cobalt and lithium were mainly recovered to about 49 wt.% and 4 wt.% in electrodic powder, respectively.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1145-1149
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantitative Analysis of Cryomilled Nanocrystalline Ti-6Al-4V Alloy Powder by X-Ray Diffraction
    Autorzy:
    Oh, M.
    Yu, H. K.
    Lee, J.-H.
    Oh, M. C.
    Jung, S.-H.
    Ahn, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/356265.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nanocrystalline
    cryomilling
    Ti alloy
    X-ray diffraction
    size-strain plot method
    Opis:
    A nanocrystalline Ti alloy powder was fabricated using cryomilling. The grain size and lattice strain evolution during cryomilling were quantitatively analyzed using X-ray diffraction (XRD) based on the Scherrer equation, Williamson-Hall (W-H) plotting method, and size-strain (S-S) method assuming uniform deformation. Other physical parameters including stress and strain have been calculated. The average crystallite size and the lattice strain evaluated from XRD analysis are in good agreement with the result of transmission electron microscopy (TEM).
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 3; 1439-1442
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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