• 대한한의진단학회지
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• 제17권2호
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• pp.90-111
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• 2013

Objectives Migratory pathogenic factor(六淫) occupies an important position in the etiology of Korean Medicine. This paper shows how Dampness, one of Migratory pathogenic factor(六淫), is explained in Donguibogam(東醫寶鑑). And, based on this, we will figure out how to make a judgement of Dampness through diagnosis. Method 1. Collect parts of Dampness mentioned in Donguibogam(東醫寶鑑). 2. From the collection, extract contents about mechanism and symptom of Dampness, which is considered necessary for diagnosis. 3. Put all the extraction together, suggest the diagnosis element which can be criteria of judgement of Dampness through diagnosis. Result & Conclusions The occurrence of Dampness come from a wet climate and environment externally, and overeating of greasy food and digestive disorder internally. There are many different kinds of symptoms throughout the body cause of poor circulation. Dampness is classed as Cold-dampness, Damp-heat, and Dampness-phlegm depending on characteristic symptoms, and mainly shows musculoskeletal disease and digestive troubles. Typical symptoms are pitting edema, distention and fullness, moderate and thready pulse, volume of perspiration increase, loose feces, urine volume decrease, pain of joint and muscle, restriction of movement, etc.

• 소성∙가공
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• 제32권3호
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• pp.114-121
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• 2023

During rolling, rolling mill rolls endure wear when shaping metal billets into a desired form, such as bars, plates, and shapes. Such wear affects the lifespan of the rolls and product quality. Therefore, in addition to rigidity, wear performance is a key factor influencing the performance of rolling mill rolls. Conventional methods such as casting and forging have been used to manufacture rolling mill rolls. However, powder alloying methods are increasingly being adopted to enhance wear resistance. These powder manufacturing methods include atomization, canning to shape the powder, hot isostatic pressing to combine the powder alloy with conventional metals, and various wear performance tests on rolls prepared with powder alloys. In this study, numerical simulations and experimental tests were used to develop and elucidate the wear analysis mechanism of rolling mill rolls. The wear characteristics of the rolls under various rolling conditions were analyzed. In addition, experimental tests (wear and surface analysis tests) and wear theory (Archard wear model) were used to evaluate wear. These tests were performed on two different materials in various powder states to evaluate the different aspects of wear resistance. In particular, this study identifies the factors influencing the wear behavior of rolling mill rolls and proposes an analytical approach based on the actual production of products. The developed wear analysis mechanism can serve the future development of rolls with high wear resistance using new materials. Moreover, it can be applied in the mechanical and wear performance testing of new products.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2009년도 추계학술대회 논문집
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• pp.65-65
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• 2009

High temperature silicon carbide Schottky diode was fabricated with Au deposited on poly 3C-SiC thin film grown on p-type Si(100) using atmospheric pressure chemical vapor deposition. The charge transport mechanism of the diode was studied in the temperature range of 300 K to 550 K. The forward and reverse bias currents of the diode increase strongly with temperature and diode shows a non-ideal behavior due to the series resistance and the interface states associated with 3C-SiC. The charge transport mechanism is a temperature activated process, in which, the electrons passes over of the low barriers and in turn, diode has a large ideality factor. The charge transport mechanism of the diode was analyzed by a Gaussian distribution of the Schottky barrier heights due to the Schottky barrier inhomogeneities at the metal-semiconductor interface and the mean barrier height and zero-bias standard deviation values for the diode was found to be 1.82 eV and $s_0$=0.233 V, respectively. The interface state density of the diode was determined using conductance-frequency and it was of order of $9.18{\times}10^{10}eV^{-1}cm^{-2}$.

• Childhood Kidney Diseases
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• 제10권1호
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• pp.45-51
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• 2006

저자들은 C3의 감소와 육안적 혈뇨를 보인 환아에서 현미경적 혈뇨가 지속되면서 8주 후 시행한 검사에서도 C3의 감소가 지속되어 MPGN을 의심하고 신생검 예정이었다. 추적 관찰 중 수막구균 뇌수막염이 동반되었고, C3와 C5의 지속적인 감소와 C7과 C9의 일시적인 감소를 확인하였으며, 신생검에서 1형 MPGN으로 확인되었다. 본 증례의 아쉬운 점은 nephritic factor의 존재나 factor H의 결핍을 입증하여야 하나 아직까지 국내에서는 시행되지 않아 확인은 하지 못하였다. 앞으로 국내에서도 nephritic factor나 다양한 보체계(complement profile)에 대한 검사들이 시행되어야 할 것이다. 이제까지 국내에서는 후기 보체 결핍에 의하여 수막구균 뇌수막의 발생 증례 보고는 2004년 이후 여러 차례 있었지만, MPGN 환자에서 수막구균의 감염은 국내에 보고된 바가 없다. 본 증례를 통해 저보체혈증이 지속되는 일부의 MPGN 환자에서는 수막구균 감염 위험성이 존재하며, nephritic factor 검사와 함께 후기 보체 결핍에 대한 검사가 필요하다고 생각한다. 또한 수막구균성 뇌수막염에 이환된 모든 환자에 대해서 보체 검사를 시행하고 이런 환자에서 주기적인 소변 검사를 통하여 이상이 있을시 MPGN의 가능성을 고려하여 신생검을 고려하여야 할 것이다.

• 한국식품위생안전성학회지
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• 제8권4호
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• pp.181-188
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• 1993

It is well known that bacterial lipopolysaccharide (LPS) stimulates the prostaglandin (PG) synthesis in various experimental system, but the mechanism and the detailed nature of its action are yet to be understood. Thus, this study was designed to characterize LPS induced PG synthesis in rat alveolar macrophage. Although results were not so much prominent, LPS stimulated PGE2 synthesis in macrophage with short term exposure, and this was thought to be mainly due to the activation of phopholipase A2+ But there was a burst in the PG synthesis 6 hours after the LPS treatment and this was accompanied with the increase of cyclooxygenase activity. This effect was not mediated by tumor necrosis factor (TNF) or platelet activating factor (PAF), and the existence of serum was prerequisite for its action. Growth factors such as epidermal growth factor (EGF) and platelet derived growth factor (PDGF) themselves did not stimulate PG synthesis and the showed stimulatory activities to some extent. Normal rat serum was more effective for the elicitation of the LPS action than growth factors. Thus, considering the amounts of growth fafctors contained in normal serum, it was suggested that another factors like LPS binding protein (LBP) might be involved in the serum effect on LPS action. Conclusively. it was thought that LPS could stimulate PG synthesis through interaction with serum factors such as EGF, PDGF and/or LBP.

• Transactions on Electrical and Electronic Materials
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• 제16권3호
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• pp.151-155
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• 2015

We fabricated the Cu Schottky contact on an n-type Ge wafer and investigated the forward bias current-voltage (I-V) characteristics in the temperature range of 100~300 K. The zero bias barrier height and ideality factor were determined based on the thermionic emission (TE) model. The barrier height increased and the ideality factor decreased with increasing temperature. Such temperature dependence of the barrier height and the ideality factor was associated with spatially inhomogeneous Schottky barriers. A notable deviation from the theoretical Richardson constant (140.0 Acm^-2K^-2 for n-Ge) on the conventional Richardson plot was alleviated by using the modified Richardson plot, which yielded the Richardson constant of 392.5 Acm^-2K^-2. Finally, we applied the theory of space-charge-limitedcurrent (SCLC) transport to the high forward bias region to find the density of localized defect states (N_t), which was determined to be 1.46 × 10¹² eV^-1cm^-3.

• 터널과지하공간
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• 제30권1호
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• pp.63-75
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• 2020

터널 발파의 최외곽에서 발생할 수 있는 과대 여굴은 작업자 및 장비의 안전에 저해되며 숏크리트 등 지보량의 증가로 공사 비용이 증가시키는 주요 원인이다. 이러한 여굴은 화약 에너지와 암반의 특성 간의 복잡한 발생 메커니즘으로 인해 완벽한 제어가 매우 어렵다. 본 연구는 여굴 발생의 중요한 원인인 암반의 공학적 특성 중 무지보 막장 상태, 단축압축강도, 풍화도 및 불연속면의 특성(빈도, 상태 및 불연속면과 최외곽선과의 각도) 등과 발생한 여굴의 깊이와의 관계를 feed-forward 인공신경망을 통해 분석하였다. 이를 통해 통해 얻어진 각 인자의 가중치를 기초로 여굴저항도(Overbreak Resistance Factor: ORF)를 개발하였다. 더불어 여굴저항도를 이용한 터널 발파 여굴 관리 시스템을 제안한다.

• 한국건설관리학회논문집
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• 제5권4호
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• pp.87-96
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• 2004

건설공사에서 공기는 매우 중요한 요소로 건설사업비에 미치는 영향이 크다. 선진국들은 공기단축을 통한 건설사업비 절감을 위해 노력하고 있다. 국내에서도 공기단축의 필요성을 절감함으로써 공기단축을 위해 많은 노력을 기울여 왔지만, 그 효과는 아직 미미한 것으로 나타나고 있다. 향후 주 5일 근무제가 시행되고, 후분양제가 도입될 경우, 건설사업비 절감이나 리스크 관리측면에서 공기단축은 필수불가결한 요인이 될 것이다. 공기를 효과적으로 단축하기 위해서는 공기에 영향을 미치는 중요요인과 공정 메커니즘을 명확하게 분석해야 한다. 이러한 사항들이 규명될 때 효과적인 공기단축이 가능해져 건설사업비를 줄일 수 있게 될 것이다. 이에 본 연구에서는 아파트 건설공사에서 공기의 $40\sim50\%$를 차지하는 골조공사의 기준층에 대한 공정메커니즘을 분석하여 골조공사의 공기에 영향을 미치는 요인들을 규명하고자 한다. 또한, 도출된 요인들을 효과적으로 활용할 수 있는 방법들을 사례 분석함으로써 합리적인 공기단축방안을 제시하고자 한다.

• 한방안이비인후피부과학회지
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• 제5권1호
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• pp.27-44
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• 1992

The cause and mechanism of eye diseases are follow in biblography. The etiological factor of eye diseases are nearly caused by heat. It is important to distinguish deficiency and substance. In external etiologic factors wind-fever is most of all in six exogenous factors. In internal etiologic factors xu(deficiency) of kidney, blood and fire of seven emotions are lots. In factors other than the internal and external, eating greasy food and hyper-caloric food are a lot of case. In relation with the yin-yang andxu-shi, ther are a lot of eye diseases symptom as dark-dizziness due to the yin-xu of hepatic-kidney. According to eight principles of differentiation of syndromes, syndromes of exterior, heat, shi, almost fall into the category of yang and syndromes of interior, cold, xu, nearly fall into the category of yin. In interior treatment, inducing wind and clearing heat, using Qi and tonifying blood, tonifying and suing of hepatic-kid ney are useful and often used treatment.

• ETRI Journal
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• 제39권4호
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• pp.605-613
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• 2017

Simulated fault injection (SFI) is widely used to assess the effectiveness of fault tolerance mechanisms in safety-critical embedded systems (SCESs) because of its advantages such as controllability and observability. However, the long test time of SFI due to the large number of test cases and the complex simulation models of modern SCESs has been identified as a limiting factor. We present a method that can accelerate an SFI tool using a checkpoint forwarding (CF) technique. To evaluate the performance of CF-based SFI (CF-SFI), we have developed a CF mechanism using Verilog fault-injection tools and two systems under test (SUT): a single-core-based co-simulation model and a triple modular redundant co-simulation model. Both systems use the Verilog simulation model of the OpenRISC 1200 processor and can execute the embedded benchmarks from MiBench. We investigate the effectiveness of the CF mechanism and evaluate the two SUTs by measuring the test time as well as the failure rates. Compared to the SFI with no CF mechanism, the proposed CF-SFI approach reduces the test time of the two SUTs by 29%-45%.