• Proceedings of the KSRS Conference
• /
• 1998.09a
• /
• pp.280.2-286
• /
• 1998

Flood is the main natural disaster mostly in the world. It is a care problem to prevent flood disaster generally. The frequency of flood disaster is high and the distributing field is wide, the 50 percent population and 70 percent properties distribute at the threaten field of flood disaster in China. Flood disaster has caused a huge amount of economical losses and these losses have an increasing trend. Along with the development of reducing natural disaster action, it has become one of the most attentive problems for monitoring flood, preventing flood and forecasting flood efficiently. Remote sensing has the characteristics of large spatial observing areas, wide spectrum ranges, and imaging far away from the targets, imaging capabilities all weather. Spatial remote sensing information, which records the full, processes of the disaster's occurrence and development in real-time. It is a scientific basis for management, planning and decision-making. Through systemic analyzing the RS monitoring theory, based on compounding RS information, the technology and method of monitoring flood disaster are studied.

• Journal of the Korean Society for Nondestructive Testing
• /
• v.16 no.1
• /
• pp.1-9
• /
• 1996

Many signal-processing techniques have been found to be useful in ultrasonic and nondestructive evaluation. Among the most popular techniques are signal averaging, spatial compounding, matched filters and homomorphic processing. One of the significant new process is split-spectrum processing(SSP), which can be equally useful in signal-to-noise ratio(SNR) improvement and grain characterization in several specimens. The purpose of this paper is to explore the utility of SSP in ultrasonic NDE. A wide variety of engineering problems are reviewed, and suggestions for implementation of the technique are provided. SSP uses the frequency-dependent response of the interfering coherent noise produced by unresolvable scatters in the resolution range cell of a transducer. It is implemented by splitting the frequency spectrum of the received signal by using gaussian bandpass filter. The theoretical basis for the potential of SSP for grain characterization in SUS 304 material is discussed, and some experimental evidence for the feasibility of the approach is presented. Results of SNR enhancement in signals obtained from real four samples of SUS 304. The influence of various processing parameters on the performance of the processing technique is also discussed. The minimization algorithm, which provides an excellent SNR enhancement when used either in conjunction with other SSP algorithms like polarity-check or by itself, is also presented.

• The Journal of Information Systems
• /
• v.31 no.1
• /
• pp.289-304
• /
• 2022

Purpose The development of the network and mobile industries has induced companies to invest in information systems, leading a new industrial revolution. The Journal of Information Systems, which developed the information system field into a theoretical and practical study in the 1990s, retains a 30-year history of information systems. This study aims to identify academic values and research trends of JIS by analyzing the trends. Design/methodology/approach This study aims to analyze the trend of JIS by compounding various methods, named as TLS mining analysis. TLS mining analysis consists of a series of analysis including Term Frequency-Inverse Document Frequency (TF-IDF) weight model, Latent Dirichlet Allocation (LDA) topic modeling, and a text mining with Semantic Network Analysis. Firstly, keywords are extracted from the research data using the TF-IDF weight model, and after that, topic modeling is performed using the Latent Dirichlet Allocation (LDA) algorithm to identify issue keywords. Findings The current study used the summery service of the published research paper provided by Korea Citation Index to analyze JIS. 714 papers that were published from 2002 to 2012 were divided into two periods: 2002-2011 and 2012-2021. In the first period (2002-2011), the research trend in the information system field had focused on E-business strategies as most of the companies adopted online business models. In the second period (2012-2021), data-based information technology and new industrial revolution technologies such as artificial intelligence, SNS, and mobile had been the main research issues in the information system field. In addition, keywords for improving the JIS citation index were presented.

• Herbal Formula Science
• /
• v.10 no.1
• /
• pp.41-55
• /
• 2002

There are total 403 prescriptions containing Radix Scutellariae in Donguibogam and among them, 106 prescriptions treat Radix Scutellariae as a principal medicine. This report describes the study on therapeutic range, symptom, pathology and composition of 106 Radix Scutellariae-main blended Prescriptions from Donguibogam. The frequency and percentage of Radix Scutellariae-main blended prescriptions for the therapeutic range are as follows; cold symptom-complex is the most frequent(11 prescriptions, 10.37%) and gynecology is second(10 prescriptions, 9.43%). The symptoms that Radix Scutellariae-main blended prescriptions are made out for are 70 prescriptions of 28 therapeutic ranges, for example, minor Eum physical appearance, fire of triple burners jaundice, etc. The main pathologies that Radix Scutellariae-main blended prescriptions are being affected by cold, fire triple burners, dampness and heat, wind and heat, heat of heart and lung, heat of liver, heat of spleen, etc. Through the research into the composition of Radix Scutellariae-main blended prescriptions, the kind of medicines and certain rules of compounding medicines centering on Radix Scutellariae are deduced as follows: The main combinations of herbal medicines are Radix Scutellariae and Fructus Gardeniae, Radix Scutellariae and Rhizona Rhei, and Radix Scutellariae, Rhizona coptidis and Fructus Gardeniae. The main combinations of prescriptions are Yihwanghwan(Radix Scutellariae, Rhizoma Cotidis, Radix Glycyrrhizae), Boanbaekchulsan(Radix Scutellariae. Rhizoma Atractylodis macrocephalae), Sambohwan(Radix Scutellariae, Rhizoma Cotidis, Cortex Phellodendrj), Samhwangwon(Radix Scutellariae, Rhizoma Cotidis, Rhizoma Rhei), Hwangryeonhaedoktang(Radix Scutellariae, Cortex Phellodendri, Rhizoma Cotidis. Fructus Gardeniae), Daegumhwahwan(Radix Scutellariae, Rhizoma Cotidis, Cortex Phellodendri. Rhizoma Rhei). Sanyeolumja(Radix Scutellariae. Rhizoma Cotidis. Radix Osterici koreani. Radix Ledebouriellae), etc.

• The Mathematical Education
• /
• v.44 no.3 s.110
• /
• pp.457-475
• /
• 2005

We have inquired on what the statistical classes of the secondary schools had been aiming to, say the epistermlogical objects. And we now appreciate that the main obstacle to the systematic articulation is the lack of anticipation on what the statistical concepts are. This study focuses on the ingredients of the statistical concepts. Those are to be the ground of the systematic articulation of statistic courses, especially of the one for the school kids. Thus we required that those ingredients must satisfy the followings. i) directly related to the contents of statistics ii) psychologically developing iii) mutually exclusive each other as much as possible iv) exhaustive enough to cover all statistical concepts We examined what and how statisticians had been doing and the various previous views on these. After all we suggest the following three concepts are the core of conceptual developments of statistic, say the concept of distributions, the summarizing ability and the concept of samples. By the concepts of distributions we mean the frequency views on each random categories and that is developing from the count through the probability along ages. Summarizing ability is another important resources to embed his probe with the data set. It is not only viewed as a number but also to be anticipated as one reflecting a random phenomena. Inductive generalization is one of the most hazardous thing. Statistical induction is a scientific way of challenging this and this starts from distinguishing the chance with the inevitable consequences. One's inductive logic grows up along with one's deductive arguments, nevertheless they are different. The concept of samples reflects' one's view on the sample data and the way of compounding one's logic with the data within one's hypothesis. With these three in mind we observed Korean Statistic Curriculum from K to 12. Distributional concepts are dealt with throughout but not sequenced well. The way of summarization has been introduced in the 1 st, 5th, 7th and the 10th grade as a numerical value only. One activity on the concept of sample is given at the 6th grade. And it jumps into the statistical reasoning at the selective courses of ' Mathematics I ' or of ' Probability and Statistics ' in the grades of 11-12. We want to suggest further studies on the developing stages of these three conceptual features so as to obtain a firm basis of successive statistical articulation.

• Journal of Korean Medicine Rehabilitation
• /
• v.29 no.4
• /
• pp.101-108
• /
• 2019

Objectives The purpose of this study is to evaluate the safety of Gunghatang tablet in healthy male volunteers. Methods Single center pharmacokinetics study was carried out in healthy male volunteers. Through the laboratory test, vital sign and adverse event data, safety evaluation was conducted. Total 15 of 16 subjects who met the inclusion criteria were enrolled and three subjects were allocated to waiting group. 12 subjects were allocated by serial number according to registration order. Subjects took the maximum daily dose of the tablet on the second day of hospitalization. For the evaluation of safety, blood samples were collected and vital sign were checked 4 times (screening, before administration, after administration and follow up period) during the trial. All adverse events were recorded and summarized as frequency and percentage. All continuous data were summarized as mean and standard deviation. For comparison of variables between before administration and after administration, data were analyzed by paired T-test or Wilcoxon signed rank test (p<0.05). Results As a result of all data related to vital sign and laboratory test in both group, there were no significant differences associated with the clinical trial drug between pre and post administration. And there was no adverse event associated with the clinical trial drug. Conclusions Gunghatang tablet were found to be safe for healthy male volunteers.