• Title/Summary/Keyword: 메타 분류기

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Blood Eosinophil and Serum Eosinophil Cationic Protein as a Marker of Bronchial Hyperresponsiveness in Children with Suspected Asthma (천식 증상 환아에서 기관지과민성의 지표로서 혈액 내 호산구와 혈청 호산구 양이온 단백(ECP))

  • Park, Yang;Kang, Hee;Kang, Eun Kyeong;Koh, Young Yull
    • Clinical and Experimental Pediatrics
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    • v.45 no.12
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    • pp.1577-1584
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    • 2002
  • Purpose : Airway inflammation is considered to be a characteristic feature of asthma, and eosinophils are recognized as the most important inflammatory cells. This study aims to assess the importance of blood eosinophil count and serum eosinophil cationic protein(ECP) levels as a noninvasive marker of bronchial hyperresponsiveness(BHR) in children with suspected asthma. Methods : This study used data from 87 subjects with asthma-like symptoms(6-18 years old). The $FEV_1$ and provocative concentration producing a 20% fall in $FEV_1(PC_{20})$ on methacholin inhalation challenge test were measured. Four groups were classified based on $PC_{20}$[Group I : <2 mg/mL; Group II : 2-8 mg/mL; Group III : 8-18 mg/mL; Group IV : (18 mg/mL], and blood eosinophil count and serum ECP levels were analyzed. In addition, subjects were classified based on the cutoff value of $PC_{20}$(BHR positive group : <18 mg/mL; BHR negative group : (18 mg/mL). Then blood eosinophil count and serum ECP level were compared between these two groups. Results : Likelihood ratio test for trends revealed a significant association between the blood eosinophil count or serum ECP level, and the degree of BHR as measured by methacholine $PC_{20}$. Blood eosinophil count or serum ECP level was significantly higher in the BHR(+) group than in the BHR(-) group. Blood eosinophil count had a positive correlation with serum ECP level. Conclusion : Blood eosinophil count and serum ECP level may be a useful non-invasive clinical marker of BHR in subjects with suspected asthma. This supports the hypothesis that BHR in asthma is a consequence of airway eosinophilic inflammation.

A Theoretical Structural Model for Caring Persons with Early Psychosis: A systematic review and qualitative meta-analysis (조기 정신증 돌봄 모형 개발: 질적 메타분석을 통한 이론적 접근)

  • Sung, Kyung Mi
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.1
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    • pp.66-74
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    • 2017
  • This study was aimed to construct a theoretical model for managing persons with early psychosis. We systematically searched SCOPUS, PubMed, RISS, Web of Knowledge, and KoreaMed for related factors to manage persons with early psychosis. Significant terms or phrases for a preliminary structural model were obtained from 19 studies since 2000 regarding the management of persons with early psychosis. Moreover, the content validity for the model was evaluated by 22 professionals. The study results revealed 51 factors for managing persons with early psychosis extracted by meta-analysis, and all factors were divided into 21 medium classification and 8 categories. A theoretical model was constructed with 8 categories, by using the middle range theory of Peplau's Interpersonal Relationships in Nursing. The results suggest that the theoretical model for the management of persons with early psychosis provides a sound theoretical basis for future study.

Target Advertisement based on a TV Viewer's Profile Inference and TV Anytime Metadata (시청자 프로파일 추론과 TV Anytime 메타데이타를 이용한 표적 광고)

  • Kim, Mun-Jo;Lee, Bum-Sik;Lim, Jeong-Yon;Kim, Mun-Churl;Lee, Hee-Kyung;Lee, Han-Gyu
    • Journal of KIISE:Computer Systems and Theory
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    • v.33 no.10
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    • pp.709-721
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    • 2006
  • The traditional broadcasting services over terrestrial, satellite and cable media have been unidirectional mass media regardless of TV viewer's preferences. Recently ich media streaming has become possible via the broadb and networks. Furthermore, since bidirectional communication is possible, personalcasting such as personalized streaming services has been emerging by taking into account the user's preference on content genres, viewing times and actors/actresses etc. Accordingly, personal media becomes an important means for content provision service in addition to the traditional broadcasting service as mass media. In this paper, we introduce a user profile reasoning method for target advertisement which is considered an important application in personalcasting service. The proposed user profile reasoning method predicts an unknown TV viewer's gender and ages by analyzing TV Viewing history data. Based on the estimated user's gender and ages, a target advertisement is provided with TV Anytime metadata. A proposed target advertisement system is developed based on the user profile reasoning and the target advertisement selection method. To show the effectiveness of our proposed methods, we present a plenty of experimental results by using realistic TV viewing history data.

Research Trends on Non-suicidal Self-Injury in Adolescents -Focusing on Domestic Academic Journals- (청소년의 비자살적 자해에 관한 연구동향 -국내학술지 중심-)

  • Jung-Sook Kim;Sang-Ook Hong
    • Industry Promotion Research
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    • v.8 no.2
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    • pp.141-148
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    • 2023
  • The purpose of this study is to analyze NSSI (Non-suicidal Self-Injury) and upcoming papers to review research achievements and endpoints and current problems. Analysis data necessary for the study were collected through the classification procedure as domestic suspension during the mandatory period related to self-harm from 2010 to the present. As a result of analysis according to classification categories (general characteristics, study subjects, research variables, program utilization), first, domestic studies related to non-suicidal self-harm increased steadily through 2019 and 2022 after increasing in 2017 (three articles) showing shape. Second, changes in the characteristics of the research subjects began to appear. If previous studies had mainly focused on adolescents who experienced self-harm, it was expanded to early adulthood (college students), and the subjects of the study diversified to include those who had experienced self-harm cessation, counselors, and parents. Third, various research methods began to appear. Compared to 2017, when quantitative research was active, research was conducted that applied various qualitative research methods (narrative, phenomenology, grounded theory, meta-analysis, case study). Finally, discussion of the research results and suggestions for future research were added.

Clinical Impact of Bronchial Reactivity and Its Relationship with Changes of Pulmonary Function After Asthmatic Attack Induced by Methacholine (기관지 반응성의 임상적 의의 및 메타콜린으로 유도된 천식 발작시 폐기능 변화와의 관계)

  • Ryu, Yon-Ju;Choi, Young-Ju;Kwak, Jae-Jin;Lee, Ji-A;Nam, Seung-Hyun;Park, Chang-Han;Chaon, Saon-Hee
    • Tuberculosis and Respiratory Diseases
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    • v.52 no.1
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    • pp.24-36
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    • 2002
  • Background: Bronchial reactivity is known to be a component of airway hyperresponsiveness, a cardinal feature of asthma, with bronchial sensitivity, and is increments in response to induced doses of bronchoconstrictors as manifested by the steepest slope of the dose-response curve. However, there is some controversy regarding methods of measuring bronchial reactivity and clinical impact of such measurements. The purpose of this study was to evaluate the clinical significance and assess the clinical use by analyzing the relationship of the bronchial sensitivity, the clinical severity and the changes in pulmonary function with bronchial reactivity. Method: A total of 116 subjects underwent a methacholine bronchial provocation test. They were divided into 3 groups : mild intermittent, mild persistent, moderate and cough asthma. Severe patients were excluded. Methacholine PC20 was determined from the log dose-response curve and PC40 was determined by one more dose inhalation after PC20. The steepest slope of log dose-response curve, connecting PC20 with PC40, was used to calculate the bronchial reactivity. Body plethysmography and a single breath for the DLCO were done in 43 subjects before and after methacholine test. Results: The average bronchial reactivity was 38.0 in the mild intermittent group, 49.8 in the mild persistent group, 61.0 in the moderate group, and 41.1 in the cough asthma group. There was a weak negative correlation between PC20 and bronchial reactivity. A heightened bronchial reactivity tends to produce an increased clinical severity in patients with a similar bronchial sensitivity and basal spirometric pulmonary function. There were significant correlations between the bronchial reactivity and the initial pulmonary function before the methacholine test in the order of sGaw, Raw, $FEV_1$/FVC, MMFR. There were no correlations between the bronchial sensitivity and the % change in the pulmonary function parameters after the methacholine test. However, there were significant correlations between the bronchial reactivity and the PEF, $FEV_1$, DLCO. Conclusion: There was weak significant negative correlation between the bronchial reactivity and the bronchial sensitivity, and the bronchial reactivity closely reflected the severity of the asthma. Accordingly, measuring both the bronchial sensitivity and the bronchial reactivity can be of assistance in assessing of the ongoing disease severity and in monitoring the effect of therapy.

Effect of delayed time, surface treatment, and repair material on shear bond strength of repaired bis-acryl composite resin (수리된 비스 아크릴 복합 레진의 전단결합강도에 대한 지연시간, 표면처리, 수리 재료의 영향)

  • Park, Ji-su;Lee, Jae-In
    • Journal of Dental Rehabilitation and Applied Science
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    • v.34 no.2
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    • pp.89-96
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    • 2018
  • Purpose: The aim of this study was to evaluate the effect of delayed time, surface treatment, and repair materials on repair of bis-acryl composite resin through comparison of shear bond strength and to evaluate the utility of bis-acryl composite resin repair using polymethyl methacrylate resin. Materials and Methods: A total of 90 bis-acryl composite resin specimens were fabricated and classified into 9 test groups, each of 10 pieces according to delayed time, surface treatment and repair material. The shear bond strength of each specimen was measured using a universal testing machine immediately after fabrication and analyzed using a statistical analysis program (IBM SPSS statistics 20). After the shear bond strength measurement, the fracture surface of the specimen was observed. Results: The highest shear bond strength ($17.54{\pm}3.14MPa$) was observed in the experimental group bonded immediately with a light-curing flowable composite resin using a bonding agent. Conclusion: When repairing bis-acryl composite resin, it is necessary to consider whether to remake according to the delayed time. For effective repair, it is desirable to consider appropriate materials and surface treatment methods according to the site or purpose of use.

Development and application of prediction model of hyperlipidemia using SVM and meta-learning algorithm (SVM과 meta-learning algorithm을 이용한 고지혈증 유병 예측모형 개발과 활용)

  • Lee, Seulki;Shin, Taeksoo
    • Journal of Intelligence and Information Systems
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    • v.24 no.2
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    • pp.111-124
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    • 2018
  • This study aims to develop a classification model for predicting the occurrence of hyperlipidemia, one of the chronic diseases. Prior studies applying data mining techniques for predicting disease can be classified into a model design study for predicting cardiovascular disease and a study comparing disease prediction research results. In the case of foreign literatures, studies predicting cardiovascular disease were predominant in predicting disease using data mining techniques. Although domestic studies were not much different from those of foreign countries, studies focusing on hypertension and diabetes were mainly conducted. Since hypertension and diabetes as well as chronic diseases, hyperlipidemia, are also of high importance, this study selected hyperlipidemia as the disease to be analyzed. We also developed a model for predicting hyperlipidemia using SVM and meta learning algorithms, which are already known to have excellent predictive power. In order to achieve the purpose of this study, we used data set from Korea Health Panel 2012. The Korean Health Panel produces basic data on the level of health expenditure, health level and health behavior, and has conducted an annual survey since 2008. In this study, 1,088 patients with hyperlipidemia were randomly selected from the hospitalized, outpatient, emergency, and chronic disease data of the Korean Health Panel in 2012, and 1,088 nonpatients were also randomly extracted. A total of 2,176 people were selected for the study. Three methods were used to select input variables for predicting hyperlipidemia. First, stepwise method was performed using logistic regression. Among the 17 variables, the categorical variables(except for length of smoking) are expressed as dummy variables, which are assumed to be separate variables on the basis of the reference group, and these variables were analyzed. Six variables (age, BMI, education level, marital status, smoking status, gender) excluding income level and smoking period were selected based on significance level 0.1. Second, C4.5 as a decision tree algorithm is used. The significant input variables were age, smoking status, and education level. Finally, C4.5 as a decision tree algorithm is used. In SVM, the input variables selected by genetic algorithms consisted of 6 variables such as age, marital status, education level, economic activity, smoking period, and physical activity status, and the input variables selected by genetic algorithms in artificial neural network consist of 3 variables such as age, marital status, and education level. Based on the selected parameters, we compared SVM, meta learning algorithm and other prediction models for hyperlipidemia patients, and compared the classification performances using TP rate and precision. The main results of the analysis are as follows. First, the accuracy of the SVM was 88.4% and the accuracy of the artificial neural network was 86.7%. Second, the accuracy of classification models using the selected input variables through stepwise method was slightly higher than that of classification models using the whole variables. Third, the precision of artificial neural network was higher than that of SVM when only three variables as input variables were selected by decision trees. As a result of classification models based on the input variables selected through the genetic algorithm, classification accuracy of SVM was 88.5% and that of artificial neural network was 87.9%. Finally, this study indicated that stacking as the meta learning algorithm proposed in this study, has the best performance when it uses the predicted outputs of SVM and MLP as input variables of SVM, which is a meta classifier. The purpose of this study was to predict hyperlipidemia, one of the representative chronic diseases. To do this, we used SVM and meta-learning algorithms, which is known to have high accuracy. As a result, the accuracy of classification of hyperlipidemia in the stacking as a meta learner was higher than other meta-learning algorithms. However, the predictive performance of the meta-learning algorithm proposed in this study is the same as that of SVM with the best performance (88.6%) among the single models. The limitations of this study are as follows. First, various variable selection methods were tried, but most variables used in the study were categorical dummy variables. In the case with a large number of categorical variables, the results may be different if continuous variables are used because the model can be better suited to categorical variables such as decision trees than general models such as neural networks. Despite these limitations, this study has significance in predicting hyperlipidemia with hybrid models such as met learning algorithms which have not been studied previously. It can be said that the result of improving the model accuracy by applying various variable selection techniques is meaningful. In addition, it is expected that our proposed model will be effective for the prevention and management of hyperlipidemia.

A Method to Find Feature Set for Detecting Various Denial Service Attacks in Power Grid (전력망에서의 다양한 서비스 거부 공격 탐지 위한 특징 선택 방법)

  • Lee, DongHwi;Kim, Young-Dae;Park, Woo-Bin;Kim, Joon-Seok;Kang, Seung-Ho
    • KEPCO Journal on Electric Power and Energy
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    • v.2 no.2
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    • pp.311-316
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    • 2016
  • Network intrusion detection system based on machine learning method such as artificial neural network is quite dependent on the selected features in terms of accuracy and efficiency. Nevertheless, choosing the optimal combination of features, which guarantees accuracy and efficienty, from generally used many features to detect network intrusion requires extensive computing resources. In this paper, we deal with a optimal feature selection problem to determine 6 denial service attacks and normal usage provided by NSL-KDD data. We propose a optimal feature selection algorithm. Proposed algorithm is based on the multi-start local search algorithm, one of representative meta-heuristic algorithm for solving optimization problem. In order to evaluate the performance of our proposed algorithm, comparison with a case of all 41 features used against NSL-KDD data is conducted. In addtion, comparisons between 3 well-known machine learning methods (multi-layer perceptron., Bayes classifier, and Support vector machine) are performed to find a machine learning method which shows the best performance combined with the proposed feature selection method.

A comparison between impulse oscillometry system and spirometry for spirometry for detecting airway obstruction in children (소아의 기도 폐쇄 평가에서 impulse oscillometry system과 폐활량 측정법의 비교)

  • Hur, Hae Young;Kwak, Ji Hee;Kim, Hyoung Yun;Jung, Da Wun;Shin, Yoon Ho;Han, Man Yong
    • Clinical and Experimental Pediatrics
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    • v.51 no.8
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    • pp.842-847
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    • 2008
  • Purpose : Measurement of forced expiratory volume in 1 second ($FEV_1$) is usually difficult to obtain in children under six years of age because it requires active cooperation. This study evaluates the sensitivity of impulse oscillometry system (IOS) parameters for detecting airway obstruction in comparison with $FEV_1$. Methods : We studied 174 children who performed the lung function and methacholine challenge tests to diagnose asthma by IOS and spirometry. Children were divided into two subgroups according to their $PC_{20}$, which is a parameter for bronchial sensitivity. We compared IOS parameters with $FEV_1$ at the baseline, post-methacholine challenge, and evaluated their correlation. Results : At the baseline, reactance at 5 Hz (X5) and resistance at 5 Hz (R5) significantly differed between the $PC_{20}$ positive ($PC_{20}{\leq}16mg/mL$) group and $PC_{20}$ negative ($PC_{20}$ >16 mg/mL) group; however, $FEV_1$, $FEV_1$ % predicted, $FEV_1_-Zs$ (Z score) did not differ. $FEV_1$ is correlated with X5 (r=0.45, P<0.01) and R5 (r=-0.69, P<0.01). $FEV_1_-Zs$ is also correlated with X5_Zs (r=-0.26, P<0.01) and R5_Zs (r=-0.31, P<0.01). After the methacholine challenge test, dose-response slopes in $FEV_1$ and X5 significantly differed between the two subgroups (P<0.05). Conclusion : IOS parameters were more discriminative than $FEV_1$ for detecting decreased baseline lung function between two subgroups and have a good correlation with $FEV_1$.

Geochemical Characteristics of Granodiorite and Arenaceous Sedimentary Rocks in Chon-Ashuu Area, Kyrgyzstan (키르키스스탄 촌아슈 지역 화강섬록암질암 및 사질원 퇴적암의 지화학적 특징)

  • Kim, Soo-Young;Chi, Sei-Jung;Park, Sung-Won
    • Economic and Environmental Geology
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    • v.44 no.4
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    • pp.273-288
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    • 2011
  • Chon-Ashuu copper mining claim area is located, in terms of the geotectonic setting, in the northern part of the suture line which is bounded with the marginal part of Issik-kul micro-continent on the southern part of North Tien-Shan terrane. The geological blocks of Chon-Ashuu districts belong to the southern tip of Kazakhstan orocline. The rock formation of this area are composed of the continental crust or/and arc collage and the paleo-continental fragments-accretionary wedge complex of pre-Altaid orogenic materials. ASI(Alumina Saturation Index) of Paleozoic plutonic rocks in Chon-Ashuu area belong to the peraluminous and metaluminous rocks which were generated from fractional crystallization of Island and volcanic arc crusts in syn-post collisional plate. The geology of the ChonAshuu area consists of upper Proterozoic and Paleozoic rock formations. According to Harker variation diagrams for Chon-Ashuu arenaceous sedimentary rocks, the silty sandstone of Chon-Ashuu area showing the mineralogical immaturity were derived from Island arc or the marginal environments of active continent in Cambro-Carboniferous period. Numerous intrusive rocks of Chon-Ashuu area are distributed along north east trending tectonic structures and are bounded on four sides by the conjugate pattern. The most common type of the plutonic rocks are granodiorite and monzodiorite. According to the molecular normative An-Ab-Or composition (Barker, 1979), the plutonic rocks in Chon-Ashuu area are classified into tonalite - trondhjemite - granodiorite (TTG) series which are an aggregation of rocks which is the country rock of copper mineralization, that are formed by melting of hydrous mafic crust at high pressure.