• Title/Summary/Keyword: Limit state analysis

Search Result 648, Processing Time 0.022 seconds

Stage Costume Design for Performance Hamlet (I) - The Analysis of Actor Image by Spectator - (햄릿 공연을 위한 무대의상 디자인(I) - 관객을 통한 인물이미지 분석 -)

  • Kim, Soon-Ku;Hwang, Seong-Won
    • Fashion & Textile Research Journal
    • /
    • v.6 no.1
    • /
    • pp.32-40
    • /
    • 2004
  • This study is done to assist in the limit of stage dress design research considering the sense of the times and the sympathy of spectators for actual stage. For the base research, to visualize the image which the spectators are feeling from Shakespeare's Hamlet, the evaluators had to analyze the whole image and color tone of the figures. First of all, 2 clothing for Hamlet, Gertrude and Ophelia had to be designed, and following conclusion has drawn. Hamlet A corresponds with passive looks which is a combination of loneliness, sadness and the unstable mental state of not adapting to and hiding from the reality. Hamlet B has more of matured looks which make Hamlet more free and comfortable from life and death as he overcame a crisis of death. Gertrude A corresponds with the image of coming right out of the funeral of late king. Gertrude B shows more of her sadness as she hears of her son Hamlet's despair and resentment and her maternal return degradation which is a special situations emphasizing her unstable and dizzy image. Ophelia A shows her usual and normal looks of a livelihood and femininity. She congratulates the wedding and coronation, and falls in love with Hamlet which shows a lot of her girlish image. Ophelia B shows dismantled rationality and violated virginity which is a very complex and unstable state showing a completely different image. Based on the above research. It was proposed their clothing through the next study of the characters, and personally make them for 2003 Yeonheedan Street Group's performance Hamlet.

Redistribution of Negative Moments in Beams Subjected to Lateral Load (횡하중에 대한 휨재의 부모멘트 재분배)

  • Eom, Tae-Sung
    • Journal of the Korea Concrete Institute
    • /
    • v.23 no.6
    • /
    • pp.731-740
    • /
    • 2011
  • Provisions for the redistribution of negative moments in KCI 2007 and ACI 318-08 use a method for continuous flexural members subjected to uniformly-distributed gravity load. Moment redistributions and plastic rotations in beams of reinforced concrete moment frames subjected to lateral load differ from those in continuous flexural members due to gravity load. In the present study, a quantitative relationship between the moment redistribution and plastic rotation is established for beams subjected to both lateral and gravity loads. Based on the relationship, a design method for the redistribution of negative moments is proposed based on a plastic rotation capacity. The percentage change in negative moments in the beam was defined as a function of the tensile strain of re-bars at the section of maximum negative moment, which is determined by a section analysis at an ultimate state using KCI 2007 and ACI 318-08. Span, reinforcement ratio, cracked section stiffness, and strain-hardening behavior substantially affected the moment redistribution. Design guidelines and examples for the redistribution of the factored negative moments determined by elastic theory for beams under lateral load are presented.

A Dynamic Simulation for Small Turboshaft Engine with Free Power Turbine Using The CMF Method (CMF 기법을 이용한 소형 분리축 방식 터보축 엔진의 동적모사)

  • 공창덕;기자영
    • Journal of the Korean Society of Propulsion Engineers
    • /
    • v.2 no.1
    • /
    • pp.13-20
    • /
    • 1998
  • A steady-state and dynamic simulation program for a small multi-purpose turboshaft engine with the free power turbine was developed. In order to reduce developing cost, time and risk, a turbojet engine whose performance was well-known was used for the gas generator, and life time was improved by replacing turbine material and by using Larson-Miller curves. The component characteristic of the power turbine was derived from scaling the gas generator turbine. Equilibrium equations of mass flow rate and work were used for the steady-state performance analysis, and the Constant Flow Method(CMF) was used for the dynamic performance simulation. The step fuel scheduling was carried out for acceleration in the dynamic simulation. Through this simulation, it was found that the overshoot of the turbine inlet temperature exceeded over the compressor turbine limit temperature.

  • PDF

Evaluation of Thermal Diffusivity and Electrochemical Properties of LiAlH4-PVDF Electrolyte Composites (LiAlH4-PVDF 전해질 복합체의 열확산 및 전기화학적 특성평가)

  • HWANG, JUNE-HYEON;HONG, TAE-WHAN
    • Transactions of the Korean hydrogen and new energy society
    • /
    • v.33 no.5
    • /
    • pp.574-582
    • /
    • 2022
  • A lithium-ion battery exhibits high energy density but has many limitations due to safety issues. Currently, as a solution for this, research on solid state batteries is attracting attention and is actively being conducted. Among the solid electrolytes, sulfide-based solid electrolytes are receiving much attention with high ion conductivity, but there is a limit to commercialization due to the relatively high price of lithium sulfide, which is a precursor material. This study focused on the possibility of relatively inexpensive and light lithium hydride and conducted an experiment on it. In order to analyze the characteristics of LiAlH4, ion conductivity and thermal stability were measured, and a composites mixed with PVDF, a representative polymer electrolyte, was synthesized to confirm a change in characteristics. And metallurgical changes in the material were performed through XRD, SEM, and BET analysis, and ion conductivity and thermal stability were measured by EIS and LFA methods. As a result, Li3AlH6 having ion conductivity higher than LiAlH4 is formed by the synthesis of composite materials, and thus ion conductivity is slightly improved, but thermal stability is rapidly degraded due to structural irregularity.

Structural, Electrical and Magnetic Properties of Wide Bandgap Diluted Magnetic Semiconductor CuAl1-xMnxO2 Ceramics (널은 띠간격 묽은 자성반도체 CuAl1-xMnxO2 세라믹스의 구조 및 전자기 특성)

  • Ji Sung Hwa;Kim Hyojin
    • Korean Journal of Materials Research
    • /
    • v.14 no.8
    • /
    • pp.595-599
    • /
    • 2004
  • We investigated the structural, electrical and magnetic properties of Mn-doped $CuAlO_2$ delafossite ceramics ($CuAl_{1-x}Mn_{x}O_2,\;0\le\;x\;\le0.05$), synthesized by solid-state reaction method in an air atmosphere at a sintering temperature of $1150^{\circ}C$. The solubility limit of Mn ions in delafossite $CuAlO_2$ was found to be as low as about 3 $mol\%$. Positive Hall coefficient and the temperature dependence of conductivity established that non-doped $CuAlO_2$ ceramic is a variable-range hopping p-type semiconductor. It was found that the Mn-doping in $CuAlO_2$ rapidly reduced the hole concentration and conductivity, indicating compensation of free holes. The analysis of the magnetization data provided an evidence that antiferromagnetic superexchange interaction is the dominant mechanism of the exchange coupling between Mn ions in $CuAl_{1-x}Mn_{x}O$ alloy, leading to an almost paramagnetic behavior in this alloy.

Current Limiting and Voltage Sag Compensation Characteristics of Flux-Lock Type SFCL Using a Transformer Winding (변압기 권선을 이용한 자속구속형 초전도 전류제한기의 전류제한 및 전압강하 보상 특성)

  • Ko, Seok-Cheol
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.25 no.12
    • /
    • pp.1000-1003
    • /
    • 2012
  • The superconducting fault current limiter (SFCL) can quickly limit the fault current shortly after the short circuit occurs and recover the superconducting state after the fault removes and plays a role in compensating the voltage sag of the sound feeder adjacent to the fault feeder as well as the fault current limiting operation of the fault feeder. Especially, the flux-lock type SFCL with an isolated transformer, which consists of two parallel connected coils on an iron core and the isolated transformer connected in series with one of two coils, has different voltage sag compensating and current limiting characteristics due to the winding direction and the inductance ratio of two coils. The current limiting and the voltage sag compensating characteristics of a SFCL using a transformer winding were analyzed. Through the analysis on the short-circuit tests results considering the winding direction of two coils, the SFCL designed with the additive polarity winding has shown the higher limited fault current than the SFCL designed with the subtractive polarity winding. It could be confirmed that the higher fault current limitation of the SFCL could be contributed to the higher load voltage sag compensation.

Amperometric Morphine Detection Using Pt-Co Alloy Nanowire Array-modified Electrode

  • Tao, Manlan;Xu, Feng;Li, Yueting;Xu, Quanqing;Chang, Yanbing;Wu, Zaisheng;Yang, Yun-Hui
    • Bulletin of the Korean Chemical Society
    • /
    • v.31 no.7
    • /
    • pp.1968-1972
    • /
    • 2010
  • Pt-Co alloy nanowire array was directly synthesized by electrochemical deposition with polycarbonate template at -1.0V and subsequent chemical etching of the template. The use of Pt-Co alloy nanowire array-modified electrode (Pt-Co NAE) for the determination of morphine (MO) is described. The morphology of the Pt-Co alloy nanowire array has been investigated by scanning electron microscopy (SEM) and energy disperse X-ray spectroscopy (EDS) analysis), respectively. The resulting Pt-Co NAE offered a linear amperometric response for morphine ranging from $2.35\times10^{-5}$ to $2.39\times10^{-3}$ M with a detection limit of $7.83\times10^{-6}$ M at optimum conditions. This sensor displayed high sensitivity and long-term stability.

A Study on the Lateral Pressure Effect for Ultimate Strength of Ship Platings (선체판부재의 최종강도에 대한 횡압력의 영향에 관한 연구)

  • Park Joo-Shin;Ko Jae-Yong;Lee Jun-Kyo;Lee Kyung-Hwan
    • Proceedings of the Computational Structural Engineering Institute Conference
    • /
    • 2005.04a
    • /
    • pp.583-591
    • /
    • 2005
  • The ship plating is generally subjected to combined in-plane load and lateral pressure loads. In-plane loads include axial load and edge shear, which are mainly induced by overall hull girder bending and torsion of the vessel. Lateral pressure is due to water pressure and cargo. These load components are not always applied simultaneously, but more than one can normally exist and interact. Hence, for more rational and safe design of ship structures, it is of crucial importance to bitter understand the interaction relationship of the buckling and ultimate strength for ship plating under combined loads. Actual ship plates are subjected to relatively small water pressure except for the impact load due to slamming and panting etc. The present paper describes an accurate and fast procedure for analyzing the elastic-plastic large deflection behavior up to the ultimate limit state of ship plates under combined loads. In this paper, the ultimate strength characteristics of plates under axial compressive loads and lateral pressure loads are investigated through ANSYS elastic-plastic large deflection finite element analysis with varying lateral pressure load level.

  • PDF

Evaluation on the Buckling Length of Circular Hollow Steel with Ball Joints (볼접합부를 갖는 원형강관부재의 좌굴길이 평가)

  • Kang, Jong
    • Journal of the Korean Society of Industry Convergence
    • /
    • v.15 no.1
    • /
    • pp.5-11
    • /
    • 2012
  • The Buckling of the member under compressive stress is likely to occur, which is an important factor determining the strength of structures. The objective of this study was to evaluate the member buckling strength of a circular hollow steel with ball joints and to compare with design specifications for load resistance factor of our country. Furthermore, we would like to suggest basic data for evaluation of buckling length of a circular hollow steel with ball joints according to comparative analysis. These results were summarized as follows: Buckling stress according to the test results on buckling was 1.21 times greater than LSD specifications of our country estimated the entire length of circular hollow steel with ball joints as buckling length. In addition, it was 1.16 times greater than when estimating the length except the ball as buckling length and 1.14 times grater than when excluding the ball and sleeve. Therefore, when estimating buckling stress of circular hollow steel with ball joints, their buckling length may be measured by the length except ball and sleeve.

The Effects of Task Oriented Circuit Exercise on Balance and Cognition in Mild Dementia Patients (순환식 과제 지향 운동이 경증치매환자의 균형능력과 인지기능에 미치는 영향)

  • Jung, Eun-Ji;Kim, Won-Bok
    • Journal of the Korean Society of Physical Medicine
    • /
    • v.9 no.1
    • /
    • pp.83-91
    • /
    • 2014
  • PURPOSE: The purpose of this study was to investigate the effects of task oriented circuit exercise(TOCE) on the balance and cognition in mild dementia patients. METHODS: The subjects of the study were 30 patients with mild dementia and assigned to the TOCE(task oriented circuit exercise) group(n=15) and aerobic exercise(AE) group(n=15). TOCE group performed six task three times weekly for 12 weeks. AE group underwent the cycle ergometer and treadmill exercise three times a week during the experimental period respectively. Timed up and go test(TUG), Berg balance scale(BBS) and AP1153 Biorescue were used to assess the parameters for the balance. Korean-mini mental state examination and Global deterioration scale(GDS) were used to assess the parameters for the cognition. For the statistical analysis, paired t-test and independent t-test were used to compare the differences among two groups. RESULTS: Each group showed improvement in balance and possibility for improving cognitive function. TOCE group especially, there were significant improvements in limit of stability. CONCLUSION: The results of the study suggest that TOCE is a more diverse exercise programs introduced in the study. Furthermore, TOCE can be a helpful to improve the balance and cognition in mild dementia patients.