http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
신태민,이건기 慶尙大學校生産技術硏究所 1991 生産技術硏究所論文集 Vol.7 No.-
In this paper, the envelope detection of α-rhythm for the quantitative analysis of EEG signals using homomorphic system is tried. To eliminate power line noise and baseline drift noise included EEG signals, digital filters are designed. Envelope was exactly extracted using homomorphic processing algorithm in α-rhythm. Because this algorithm simple processing in comparison with complex demodulation method and Hilbert transformation method, computation is remarkably reduced. Therefore, this algorithm can be executed the real time, which make it possible to monitoring longterm data. And, although frequency change of neural oscillation signal, it makes possible an exact envelope detection. However, homomorphic processing algorithm bring about leakage of information in envelope detection of low-frequency signals.
구미산업단지 대기중 휘발성유기화합물(VOCs)의 농도특성
최우건,배상호,박덕신,정연구,김태오 한국환경과학회 2004 한국환경과학회지 Vol.13 No.3
This study focuses on the measurement of airborne Volatile Organic Compounds (VOCs) in the Kumi electronic industrial complex during the time periods of August and September, 2002 and January and February, 2003. This study was based on the US-EPA method TO-14 while the VOCs were analyzed with GC/MSD. The toluene level revealed high concentration at all measurement sites. The areal rank of average concentrations of VOCs is as follows : industry l>industry2>urban>middle>residential. Concentrations of VOCs in Kumi electronic industrial ones were generally higher than at Yeochon and Ulsan industrial complexes. Dichloromethane and trichloroethylene, which are used as a cleaner in the process of electronic industries, were observed 4 to 8 times higher than those of other areas. Among the aromatic compounds, toluene showed the highest level, while the concentrations of dichloromethane and trichloroethylene were higher than those of other halogen compounds. In Kumi, toluene, trichloroethylene, and dichloromethane were confirmed as the major compounds of VOCs by this research.
성제중,서동만,신용훈,엄태건,서동섭 한국비파괴검사학회 2003 학술대회 논문집 Vol.- No.1
Ferromagnetic material like the steel tubes can easily distort eddy current testing signal due to increased magnetic permeability for defects. Because magnetic field of the test probe is affected in an inconsistent way when the material under the testing has permeability. This permeability effect can be reduced by magnetic saturation. In this paper eddy current testing system was developed to detect flaws on the steel tubes. Magnetic saturation probe with helmholtz coil was designed for saturation and inspection of the steel tubes. When using the designed test probe, the relationship between flaw signals and noises was obviously discriminated. Additionally, a high pass filter was included in the eddy current board to minimize noises due to DC magnetic field.
박상호,온영근,김현정,이태훈,길효욱,김현건,박수진,송해정,한대희,방덕원,신원용,이내희,김성구,권영주 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1
Background : Microvascular angina or syndrom X is heterogenous and encompasses different pathogenetic entities. Several studies suggest that microvascular angina have good prognosis and occurs predominantly in postmenopausal women. Lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and fibrinogen are the independent risk factor of acute coronary syndrome and are the chief underlying cause of atherosclerosis. We investigated clinical characteristics and markers in patients with microvascular angina. Methods : We studies 23 patients diagnosed with microvascular angina and 16 control group with negative treadmill exercise test and no significant coronary angiogram. We investigated clinical characteristics in patients group and evaluated symptom during a follow-up period of 4.2± 2.5 month. Exercise time in treadmill exercise test was compared between patients and control group. We assessed the level of markers, such as lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and ESR in two groups. Results : There is no difference in age between two groups. Patients group had a tendency to increase in female, hypertension, DM, and smoking history, but there was no statistical significance difference. Exercise duration time was significantly decreased in patients with microvascular angina (p<0,05). Serum lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholestrol, Triglyceride, ESR, Fibrinogen and Homocystein value were no significant difference between microvascular angina and control group. Only CRP was significantly high in patients with microvascular angina (p<0.05). Conclusion : There was no statistical significance difference in age, sex, hypertension, DM and smoking history between two groups but patients group had a tendency to increase the prevalence in hypertension, DM and smoking history, female. Also, Symptom improvement and disappearance in follow-up was presented in 11 patients of 19(57.9%). Exercise tolerance was worse in patients group than control group. CRP value was significantly higher in patients group than control group. There was no statistical significance difference in lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, ESR and Fibrinogen between two groups.
Shin Tae Gun,Lee Youngjoo,Kim Kyuseok,Lee Min Sung,Kwon Joon-myoung 대한응급의학회 2023 Clinical and Experimental Emergency Medicine Vol.10 No.4
Objective Based on the development of artificial intelligence (AI), an emerging number of methods have achieved outstanding performances in the diagnosis of acute myocardial infarction (AMI) using an electrocardiogram (ECG). However, AI-ECG analysis using a multicenter prospective design for detecting AMI has yet to be conducted. This prospective multicenter observational study aims to validate an AI-ECG model for detecting AMI in patients visiting the emergency department.Methods Approximately 9,000 adult patients with chest pain and/or equivalent symptoms of AMI will be enrolled in 18 emergency medical centers in Korea. The AI-ECG analysis algorithm we developed and validated will be used in this study. The primary endpoint is the diagnosis of AMI on the day of visiting the emergency center, and the secondary endpoint is a 30-day major adverse cardiac event. From March 2022, patient registration has begun at centers approved by the institutional review board.Discussion This is the first prospective study designed to identify the efficacy of an AI-based 12-lead ECG analysis algorithm for diagnosing AMI in emergency departments across multiple centers. This study may provide insights into the utility of deep learning in detecting AMI on electrocardiograms in emergency departments.Trial registration ClinicalTrials.gov identifier: NCT05435391. Registered on June 28, 2022.
Yim, Yeong Shin,Choi, Jin-sil,Kim, Gun Tae,Kim, Chul Hoon,Shin, Tae-Hyun,Kim, Dong Goo,Cheon, Jinwoo The Royal Society of Chemistry 2012 Chemical communications Vol.48 No.1
<p>This study provides an easy and simple method to obtain inorganic nanoparticles that can penetrate the blood–brain barrier, the heavily guarded system in the brain, <I>via</I> cross-linked serum albumin surface coatings. Their intact BBB permeability was confirmed in both <I>in vitro</I> and <I>in vivo</I> tests.</p> <P>Graphic Abstract</P><P>Through a simple surface coating with serum albumin, inorganic nanoparticles can enter into brain across blood-brain barrier. Such penetration ability is confirmed with in vitro and in vivo studies. <img src='http://pubs.rsc.org/ej/CC/2011/c1cc15113d/c1cc15113d-ga.gif'> </P>
Numerical Deficiency of Natural killer T Cells in Acute Respiratory Distress Syndrome
( Tae-ok Kim ),( Young-wook Park ),( Young-nan Cho ),( Hong-joon Shin ),( Bo-gun Kho ),( Young-soo Kwon ),( Seung-jung Kee ) 대한결핵 및 호흡기학회 2021 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.129 No.-
Objective Human natural killer T (NKT) cells are a subset of T lymphocytes. NKT cells produce a large amount of cytokines and activate a variety of immune cells. However their roles in acute respiratory distress syndrome (ARDS) are not fully examined yet. This study aimed to examine levels and functions of NKT cells in ARDS patients. Methods Peripheral blood samples from ARDS patients (n=10) and healthy controls (HCs, n=10) were collected. Levels of NKT cells, cytokines, CD69, programmed death-1 (PD-1), and Annexin V+ were measured by flow cytometry. Results Circulating NKT cell levels were significantly reduced in ARDS patients than in HCs. Cytokine production profiles in NKT cells showed that percentages of interleukin (IL)-17 producing NKT cell were significantly higher in ARDS patients than in HCs. ARDS patients exhibited higher expression levels of CD69 in circulating NKT cells. Conclusions This study demonstrates that circulating NKT cells are numerically deficient in patients with ARDS. In addition, NKT cells increase IL-17 secretions in ARDS patients
Bacterial Reverse Mutation Test of Verbenalin
Shin Hye Jeong,Lim Yi Gun,Ha Jisu,Yang Gabsik,Yook Tae Han 대한약침학회 2022 Journal of pharmacopuncture Vol.25 No.4
Objectives: Verbenalin is a compound found in herbs such as Cornus officinalis and Verbena officinalis. This study investigated whether verbenalin is safe by analyzing its mutagenicity. Methods: To examine the mutagenic potential of verbenalin, a bacterial reverse mutation test (Ames test) was conducted with Salmonella typhimurium and Escherichia coli strains. Experiments with and without metabolic activity were performed. Results: The mean colony number was less than double that of the control. Growth inhibition and precipitation of verbenalin were not apparent in all strains at different concentrations regardless of metabolic activity. Conclusion: Verbenalin did not show any signs of mutagenicity in this study. Additional toxicity studies including repeated oral toxicity, reproductive toxicity, and carcinogenicity tests are needed.