• 제목/요약/키워드: Consequences

검색결과 2,428건 처리시간 0.023초

Numerical prediction of pressure pulsation amplitude for different operating regimes of Francis turbine draft tubes

  • Lipej, Andrej;Jost, Dragica;Meznar, Peter;Djelic, Vesko
    • International Journal of Fluid Machinery and Systems
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    • 제2권4호
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    • pp.375-382
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    • 2009
  • Hydraulic instability associated with pressure fluctuations is a serious problem in hydraulic machinery. Pressure fluctuations are usually a result of a strong vortex created in the centre of a flow at the outlet of a runner. At every radial turbine and also at every single regulating axial turbine, the draft tube vortex appears at part-load operating regimes. The consequences of the vortex developed in the draft tube are very unpleasant pressure pulsation, axial and radial forces and torque fluctuation as well as turbine structure vibration. The consequences of the vortex are transferred upstream and downstream with amplitude and frequency modulation in respect of the turbine operating regime, cavitation conditions and air admitted content. Numerical prediction of the vortex appearance in the design stage is a very important task. The amplitude of the pressure pulsation is different for each operating regime therefore the main goal of this research was to numerically predict pressure pulsation amplitude versus different guide vane openings and to compare the results with experimental ones. For the numerical flow analysis of a complete Francis turbine (FT), the computer code ANSYS-CFX11 has been used.

CISG상 계약해제의 효과 - 원상회복의무를 중심으로 - (The Effects of Avoidance of the Contacts under the CISG - Focusing on Duty of Restoring to the Original State -)

  • 서지민
    • 무역상무연구
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    • 제63권
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    • pp.25-62
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    • 2014
  • Avoidance refers to the process of terminating a contract because of a non-performance. It implies the right of the aggrieved party to refuse to accept further performance by the other side and to refuse to perform one's own counter-obligations, on a permanent basis. The 1980 U.N. Convention on the International Sale of Goods, hereinafter 'CISG', regulates in Arts. 81-84 the effects of avoidance. The primary effect is that prescribed in Art. 81.1 CISG: both parties are released from their obligations under the contract, subject to any damages which may be due. As seen, the CISG deals with the legal consequences of avoidance, including restitutionary claims. However, a closer look to CISG provisions on restitution reveals that certain matters are left open. For instance, the CISG leaves open questions such as the costs, place and time where restitution is to be made. In this particular, the Convention remains silent as to the consequences of a delayed or refused restitution or the buyer's liability when the goods are damaged or destroyed after the avoidance. In light of the above, the present article attempts to determine the extent to which the modes of restitution are regulated in the CISG and how possible gaps are to be filled.

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부자(附子) 및 천오(川烏)를 포함한 처방이 심전도 변화에 미치는 영향 (Consequences of Doses of Herbal Medicine Including Buja and Cheono on Electrocardiography)

  • 안수연;황원덕;김원일
    • 대한한방내과학회지
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    • 제36권4호
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    • pp.458-469
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    • 2015
  • Objectives: Buja and Cheono, containing aconitine known for its cardiotoxicity, are not commonly prescribed, but they are necessary for some clinical conditions. Hence, consequences for electrocardiography (EKG) after short- and long-term dosage of herbal medicine including Buja and Cheono are here reported.Methods: From September 2014 to April 2015, 36 patients belonging to the sixth internal medicine department of the Dong Eui Oriental Medicine Hospital took herbal medicine including Buja and Cheono, and after these doses, they underwent an EKG. Thirty-one patients who took the medicine for 7-8 days comprised the short-term group, and 18 patients taking the medicine for 17-106 days comprised the long-term group. The results of the EKGs for each group, before and after dosage with herbal medicine, are compared.Results: No significant changes in EKG appeared in either the short- or the long-term group after taking herbal medicine including Buja and Cheono.Conclusions: If Buja or Cheono are prescribed along with other suitable herbs by a doctor of Korean medicine, no cardiac trouble will occur on an EKG regardless of the term of the dosage.

Contractors' Perception towards Safety and its Consequences on Construction Workers in Cape Coast Metropolis

  • Mustapha, Zakari
    • 식품보건융합연구
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    • 제5권6호
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    • pp.11-16
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    • 2019
  • The construction environment has been declared as a hazard prone area due to high number of accident and death. The study aims to identify influential factors that contribute to poor safety practices and its consequences on construction workers in Cape Coast Metropolis. Seventy respondents were taken as the sample size for the study. Descriptive analysis was used to analyze the data obtained from the field. Findings show that poor site management, working without safety gadgets, failure to use their Personal Protective Equipment (PPE) and negligence of workers were the main causes of accidents on sites. Poor site management had the highest ranking among the seven variables. Effects of poor safety practices on building construction site and delays in work execution were due to injury of workers, extra cost due to payment of compensation to injured victims, not motivated due to injury of worker and declined reputation of firm. Management team should motivate workers for safe work done, provide adequate PPE for their workers on site and have documented health and safety policy on site. Site authorities and management team should be on site regularly to ensure proper safety practices on construction site.

수단-목적 사슬 이론의 래더링 기법을 이용한 한식에 대한 한국인의 가치체계 연구 (Exploring Motivations of Koreans Towards Korean Foods: Application of Means-end Chain Theory Approach)

  • 이경원;조미숙
    • 한국식생활문화학회지
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    • 제32권2호
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    • pp.89-98
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    • 2017
  • To enrich a country's food culture, it is essential that residents understand and care about that culture. Although various efforts to globalize Korean food have been made outside Korea, the importance of understanding Koreans' perception of and increasing interest in Korean food has been neglected. Thus, this study was conducted to identify the cognitive structures regarding Korean food among 30 Koreans living in metropolitan cities using in-depth laddering interviews based on the means-end chain theory. The most dominant cognitive structures toward Korean food were familiarity (attributes), ease of digestion and health (functional consequences), sense of responsibility and will to live (psychosocial consequences), and family affection and sense of achievement (values). In short, Koreans were found to consume Korean food to achieve perceived high-dimensional values rather than simply for its attributes or benefits. These findings have important implications for future strategies and policies aimed at increasing Korean food consumption by Koreans, as they suggest that underlying and symbolic values rather than the attributes of Korean food are more effective in promoting its consumption. Further studies on understanding perceptions and values using a larger Korean population are needed to preserve and further develop Korean food.

아동간호학에서의 아버지 자녀양육에 대한 연구 경향과 전망 (Trend and Perspectives of Studies on Paternal Parenting in Pediatric Nursing)

  • 권인수
    • Child Health Nursing Research
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    • 제19권2호
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    • pp.69-75
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    • 2013
  • The significance of father's parenting has been considered as a critical factor in facilitating growth and development and in promoting wellbeing of children. Pediatric nursing is a pertinent science to develop parenting roles, because it deals with knowledge and skills on growth and development and health of child. For this paper current studies were reviewed related to consequences to the family, content and factors influencing paternal parenting, and father's reactions to child rearing participation. Perspectives of future studies in pediatric nursing are summarized as follows. First, paternal parenting has to be studied more actively to contribute to family health and to meet the academic responsibility of pediatric nursing. Second, it is necessary to study the consequences to child's health and health behavior of paternal parenting. Also it is necessary to be concerned about fathers' reactions, like stress in parenting behavior, to understand the parenting father himself. Third, an objective measure of caregiving behavior (not self-reporting) is needed to determine whether the father is behaving appropriately. Further, experimental research has to be implemented to develop intervention programs for paternal parenting. It is hoped that the examination of these studies leads to develop of knowledge and practice in paternal parenting.

화재분석모델을 이용한 이중격실화재 검증분석 (Simulation of Pool Fire with Two Rooms Using FDS Model)

  • 김봉현;배용범;류수현;이공희;김윤일;문찬기;박종석
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2008년도 하계학술발표대회 논문집
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    • pp.1332-1337
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    • 2008
  • Fire model shall be verified and validated to reliably predict the consequences of fires within its limitations. This study aims to predict pool fire with two rooms using FDS and to coompare FDS simulation results with PRISME experimental data which can be applicable to the fire of nuclear power plant facility. Four different sizes of grid (0.08m, 0.1m, 0.125m, 0.2m) are used in the simulation and the simulated results of specific quantities such as temperature, chemical composition, heat flux and heat release rate are compared to the experimental data. From this study, the FDS simulation results with the finer grid resolution show better similarity and trend with pool fire experimental data. The sensitivity analysis and the selection of the proper size grid are essential to predict the consequences of pool fire with two rooms reliably.

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디지털저작물의 지속적 공유와 온라인 유료서비스 이용의 영향요인 (Factors that Affect the Continuous Sharing of Digital Products and the Use of Online Services)

  • 한정희
    • 경영과정보연구
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    • 제27권
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    • pp.1-30
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    • 2008
  • The objective of this paper is to gain a better understanding of factors influencing digital piracy and the use of paid services on the web. A model identifying and describing various factors which affect decision$\sim$makers' attitude toward sharing digital products and online behavioral intentions is constructed based on established theories of human behavior. The relationship between the continuous intention of sharing the products and the intention to use online services is also discussed. Findings show that a independent relationship exists between illegal and legal behaviors, which means stopping piracy by individuals can not lead to their buying of the products. Also while the attitude toward piracy was significantly related to the continuous intention of piracy behaviors, did not necessarily lead to the use intention of online services. The data also show that beliefs concerning consequences of digital piracy were significant enough to alter one's behavioral attitude. There was a significant relationship between perceived consequences and the intention to pirate digital products or to use paid services. The results also show that while the effect of economical and ethical factors were ascertained, that of social and legal factors have not been found. Self$\sim$efficacy has a moderating effect on the relationship between the attitude toward piracy and both intentions of online behavior. The implications of the findings to research and practice are discussed.

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부식을 고려한 해저 파이프라인의 확률론적 중량물 낙하 충돌 위험도 해석 (Probabilistic Risk Analysis of Dropped Objects for Corroded Subsea Pipelines)

  • 안쿠시 쿠마;서정관
    • 대한조선학회논문집
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    • 제55권2호
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    • pp.93-102
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    • 2018
  • Quantitative Risk Assessment (QRA) has been used in shipping and offshore industries for many years, supporting the decision-making process to guarantee safe running at different stages of design, fabrication and throughout service life. The assessments of a risk perspective are informed by the frequency of events (probability) and the associated consequences. As the number of offshore platforms increases, so does the length of subsea pipelines, thus there is a need to extend this approach and enable the subsea industry to place more emphasis on uncertainties. On-board operations can lead to objects being dropped on subsea pipelines, which can cause leaks and other pipeline damage. This study explains how to conduct hit frequency analyses of subsea pipelines, using historical data, and how to obtain a finite number of scenarios for the consequences analysis. An example study using probabilistic methods is used.

An Antioxidative and Antiinflammatory Agent for Potential Treatment of Osteoarthritis from Ecklonia cava

  • Shin Hyeon-Cheol;Hwang Hye Jeong;Kang Kee Jung;Lee Bong Ho
    • Archives of Pharmacal Research
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    • 제29권2호
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    • pp.165-171
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    • 2006
  • Osteoarthritis is thought to be induced by the ageing-related loss of homeostatic balance between degeneration and repair mechanism around cartilage tissue in which inflammatory mediators such as reactive oxygen species, cytokines and prostaglandins are prone to overproduction under undesirable physiological conditions. Phlorotannins are unique polyphenolic compounds bearing dibenzo-1,4-dioxin skeleton which are not found in terrestrial plants but found only in some brown algal species such as Ecklonia and Eisenia families. Phlorotanninrich extracts of Ecklonia cava including LAD103 showed significant antioxidant activities such as DPPH radical scavenging, ferric ion reduction, peroxynitrite scavenging, and inhibition of LDL oxidation, indicating their possible antioxidative interference both in onset and downstream consequences of osteoarthritis. LAD103 also showed significant down regulation of $PGE_2$ generation in LPS-treated RAW 246.7 cells, and significant inhibition of human recombinant interleukin-$1{\alpha}$-induced proteoglycan degradation, indicating its beneficial involvement in pathophysiological consequences of osteoarthritis, the mechanism of which needs further investigation. Since LAD103 showed strong therapeutic potentials in arthritic treatment through several in vitro experiments, it is highly encouraged to perform further mechanistic and efficacy studies.