• Title/Summary/Keyword: Cause by case

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Failure Analysis of Carburized Gears by Microstructural Observation (침탄처리된 기어의 미세 조직학적 손상 원인분석)

  • Chun, Hae Dong;Chang, Sung Ho;Kim, Kyung Wook;Kuk, Youn Ho
    • Journal of the Korean Society for Heat Treatment
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    • v.27 no.4
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    • pp.191-201
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    • 2014
  • The gear was made of SNC815 case-carburized, quench hardened and tempered steel. The gears were failed far earlier than the expected service life used in the industrial site. Causes of the failed gear were analyzed by microstructure observation. By the SEM and micro structure examinations, the damaged surfaces had been weared and failed by fatigue. Through microscope observation on the damaged surface, it was found that the cause of failure was determined by external overloading and the initial stage of the damage was closely related to complex contact fatigue failure. The overload and contact fatigue contributed to the early failure cause.

CONSTRUCTION DEFECTS AND MONETARY RETENTIONS IN CONSTRUCTION PROJECT: A REVIEW OF CASE LAW

  • Priyanka Raina;John Tookey
    • International conference on construction engineering and project management
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    • 2011.02a
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    • pp.629-635
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    • 2011
  • Retentions are generally considered to be intended to act as a powerful tool to incentivize contractors/subcontractors to remedy defective work in cases of non-performance. This study attempts to establish the extent to which retentions can be used for this purpose by investigating case law connected with insurance and defective work. One of the significant questions is whether retentions are sufficient to deal with construction defects or value of retentions in the rectification of defects is illusory. The cost to repair a defect may vary depending on a number of components including type, cause, magnitude and the construction stage at which the defect occurs. It is expected that a review of existing cases on defective workmanship will provide an insight on the issues and whether retentions are effective in their intended function. In order to establish their functionality, the study described in this paper investigated 6 construction insurance cases to identify the critical issues and the causes of dispute. It was found that the nature and the cause of defects were different in each case. It was also established that certain defect types not covered by insurance may be covered by retentions - potentially one of the key uses of a retention strategy. It is expected that the findings will assist in forming a view on the quantum of money that may be required paving the way for a first time understanding on a rational basis for setting up retention regime.

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Study of Hands and Feet Hyperhidrosis according to Hyungsang Remedy (수족다한증(手足多汗症)의 형상의학적 고찰)

  • Jung, Heung-Sik;Park, Jae-Hong;Kang, Kyung-Hwa;Lee, Yong-Tae
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.24 no.2
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    • pp.187-196
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    • 2010
  • We have come to a conclusion below after studying about the cause of limb hyperhidrosis through references, putting the result into practice clinically from Hyungsang remedy point of view, examining the effect of treatment. The cause of limb, palm and sole hyperhidrosis. The cause of limb hyperhidrosis is stomach heat(Yangmyung heat), weakness and coldness of stomach, moisture and heat of spleen and stomach, energy insufficiency of spleen and stomach, weakness of Yin of spleen and stomach, heat by weakness Yin meridian, unspread energy of liver, severe heat of heart, weakness of heart, shortage of blood, the functional disorder of kidney meridian and heart meridian(disposition of water ascension and fire descent), heat of blood(the functional disorder of heart) etc. The cause of palm hyperhidrosis is blood insufficiency of heart and liver or the functional disease of heart and stomach. The cause of sole hyperhidrosis is the functional disease of heart and kidney or the functional disease of kidney. Types classified by the cause of limb hyperhidrosis. The case of stomach heat, moisture and heat of spleen and stomach is found a lot in Yangmyeong and Fish Type. The case of weakness and coldness of stomach or insufficiency energy of spleen and stomach is found in Bangkwang and Ki Type, the shape of disorder of transfer and transformation of spleen and stomach. The case of severe heat of heart, the functional disorder of kidney meridian and heart meridian(disposition of water ascension and fire descent), heat of blood(the functional disorder of heart), heat by weakness of meridian of Yin is found a lot in Dam, Bird and Shin Type. Limb sweat caused by unspread energy of liver is found a lot in Horse Type. Palm sweat is found a lot in Bird or Yangmyeong Type. Sole sweat is found a lot in Fish or Taeum Type. Jeokbokryung-tang was good especially for type limb hyperhidrosis falling under the shape of the small intestines heat which conforms to the person having a short perpendicular furrow of the upper lip or lifted upper lip. Palmul-tang was good for type limb hyperhidrosis tending to having leaking liquid and humor because of the disorder of transfer of Jung, Ki, Shin, Hyul. Dossipyungwi-san and Hyangsapyungwi-san were good for type limb hyperhidrosis caused by stomach heat by food accumulation and Ki depression.

회전체 기계전단을 위한 Hybrid 진단 시스템

  • 박홍석;강신현;이재종
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.10a
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    • pp.852-855
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    • 1995
  • In modern plant lndustry, dignosis system is an essential implement because a human operator cannot check the state of system all the time. The recent facility needs a computer system which is able to replace and extense the function of the human expert. Checking the state of the plant system, the computer system uses signals form sensors attached to the plant systems. But, It is difficult to predict the cause of the failure from the sensing signals. Because the relationship among the signals cannot be easily represented by mathematical models. So expert system based on a fuzzy rule and Neural network method is sugguested. Expert system decide whether aa state of the system is ordinary of failure by the evaluation of the signals. If the state of the system is unstable, expert system preprocess the signals. When fault is occurred in the machine, the expert system dignoses the state of the system and find the cause as a primary tool. If the expert system dose not find the adequate cause successfully, neural network system uses the preprocessed signals as an input and propose a cause of the failure.

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The Study of Cable Fault Case and the Fault Management System of Electrical Facilities for private use (수용가 전기설비 사고처리 시스템 및 케이블 사고사례 연구)

  • Kim, Young-Seok;Shong, Kil-Mok;Kim, Sun-Gu
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2009.05a
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    • pp.59-62
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    • 2009
  • When happen the electrical facilities accident the one's diagnosis system of fault cause was constructed by FMEA method Cable accident cause is given by accident cause that can happen in each one's diagnosis and accident probability value. From the verification of system, the one's diagnosis system agreed well with result that analyzed actual state. Thus, the system is judged to be used effectively examine for accident cause of electrical facilities.

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Unexpected Death by Sepsis of Staphylococcus aureus with Infective Endocarditis and Paravertebral Abscess in a Fisherman during Sailing out for Fish: An Autopsy Case (심내막염과 척추 주위 농양을 동반한 황색포도알균에 의한 출어 중의 선상 패혈증 사망: 증례 보고)

  • Kim, Youn Shin;Hwang, In Kwan;Moon, Seohyun;Park, Ji Hye;Lee, Young Seok
    • The Korean Journal of Legal Medicine
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    • v.42 no.4
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    • pp.153-158
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    • 2018
  • Staphylococcus aureus is an important cause of human infections, and it is also a commensal that colonizes the nose, axillae, vagina, throat, or skin surfaces. S. aureus has increasingly been recognized as a cause of severe invasive illness, and individuals colonized with this pathogen are subsequently at increased risk of its infections. S. aureus infection is a major cause of skin, soft tissue, respiratory, bone, joint, and endovascular disorders, and staphylococcal bacteremia may cause abscess, endocarditis, pneumonia, metastatic infection, foreign body infection, or sepsis. The authors describe a case of a fisherman who died of sepsis on a fishing boat during sailing out for fish. The autopsy shows paravertebral abscess, pus in the pericardial sac, infective endocarditis with vegetation on the aortic valve cusp, myocarditis, pneumonia and nephritis with bacterial colonization, and also liver cirrhosis and multiple gastric ulcerations.

A Case of Colonic Angiodysplasia (대장의 Angiodysplasia 1례)

  • Oh, Ha-Na;Yoo, Jee-Hyung;Lee, Chang-Han;Chung, Ki-Sup
    • Pediatric Gastroenterology, Hepatology & Nutrition
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    • v.3 no.2
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    • pp.206-211
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    • 2000
  • Angiodysplasia is an important vascular lesion of the gastointestinal tract, located at the site of ectasia of intestinal submucosal veins and overlying mucosal capillaries. It is a major cause of morbidity from gastrointestinal bleeding in old age, but rather rare in children. Its cause is still unknown, though is mostly considered to be acquired as a result of a degenerative process associated with aging. We experienced a case of colonic angiodysplasia in 14-year old boy, diagnosed by colonoscopy. The patient had a history of repeated hematochezia for a year. This report summarized our case and reviewed the literature.

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A Clinical Report about Primary Trigeminal neuralgia patient (원발성 삼차신경통 환자 치험 1례)

  • Kim, Kyoung-Ok;Kim, Su-Youn
    • Journal of Oriental Neuropsychiatry
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    • v.16 no.1
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    • pp.221-226
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    • 2005
  • The trigeminal neuralgia whose pain is led repeatedly and fitfully is limited inside the trigeminal nervous territory. The cause reveals so far clearly from the western medicine. According to this cause, the treatment is divided into surgical and non-surgical method. But the reduction of pain is not certificate and the case which concurs a sequela is many. So we made up to control typical primary trigeminal neuralgia by oriental medicine treatment like Herb Medication and A-Tx. In this case, patient is diagnosed 'Fire from stagnation of liver and stomach'(肝胃實熱)based on several symptoms. According to this, we used herbal medicine-chungpyesagantang-, and these efforts helped the case of disease.

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A Case of Peritoneal Dialysis-related Peritonitis Caused by Aeromonas Hydrophila in the Patient Receiving Automated Peritoneal Dialysis

  • Kim, Hyun Jin;Park, Hyun Sun;Bae, Eunsin;Kim, Hae Won;Kim, Beom;Moon, Kyoung Hyoub;Lee, Dong-Young
    • Electrolytes & blood pressure
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    • v.16 no.2
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    • pp.27-29
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    • 2018
  • Peritoneal dialysis (PD)-related peritonitis is a major cause of injury and technique failure in patients undergoing PD. Aeromonas hydrophila is ubiquitous in the environment, and is a Gram-negative rod associated with infections in fish and amphibians in most cases; however, it can also cause opportunistic infections in immunocompromised patients. We report a case of A. hydrophila peritonitis in a 56-year-old male on automated PD. Peritonitis may have been caused by contamination of the Set Plus, a component of the automated peritoneal dialysis device. Although Set Plus is disposable, the patient reused the product by cleansing with tap water. He was successfully treated with intraperitoneally-administered ceftazidime and has been well without recurrence for more than 2 years.

Recurrent hemolytic uremic syndrome caused by DGKE gene mutation: a case report

  • Shin, Baek Sup;Ahn, Yo Han;Kang, Hee Gyung
    • Childhood Kidney Diseases
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    • v.26 no.1
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    • pp.58-62
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    • 2022
  • Atypical hemolytic uremic syndrome (aHUS) is a rare disease characterized by microangiopathic hemolytic anemia, thrombocytopenia, and acute kidney injury without any association with preceding diarrhea. Dysregulation of the complement system is the most common cause of aHUS, and monoclonal humanized anti-C5 antibodies are now recommended as the first-line treatment for aHUS. However, if the complement pathway is not the cause of aHUS, C5 inhibitors are ineffective. In this study, we report the second reported case of aHUS caused by DGKE mutations in Republic of Korea. The patient was an 11-month-old infant who presented with prodromal diarrhea similar to typical HUS, self-remitted with conservative management unlike complement-mediated aHUS but recurred with fever. While infantile aHUS often implies genetic dysregulation of the complement system, other rare genetic causes, such as DGKE mutation, need to be considered before deciding long-term treatment with C5 inhibitors.