• Coupled systems mechanics
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• 제9권2호
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• pp.111-123
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• 2020

Wastewater treatment plants (WWTPs) with activated sludge system are widely used throughout the most common technologies in the world. Most treatment plants require optimization of certain treatment processes using dynamic modeling. A lot of examples of dynamic simulations require reliable data base of diurnal variation of the inflow and typical concentrations of parameters such as Chemical Oxygen Demand (COD), Total Kjeldahl Nitrogen (TKN), etc. Such detailed data are not available, which leads to problemsin the application of dynamic simulations. In many examples of plants, continuous flow measurements are only performed after the primary clarifier, whereas measurements from influent to the plant are missing, as is the case with the examples in this paper. In some cases, a simpler, faster and cheaper way can be applied to determine influent variations, such as the "HSG-Sim" method ("Hochschulgruppe Simulation"). "Hochschulgruppe Simulation" is a group of researchers from Germany, Austria, Switzerland, Luxembourg, Netherlands and Poland (see http://www.hsgsim.org). This paper presents a model for generating daily variations of inflow and concentration of municipal wastewater quality parameters, applied to several existing WWTPs in Bosnia and Herzegovina (B&H). The main goal of the applied method is to generate realistic influent data of the existing plants in B&H, in terms of flow and quality, without any prior comprehensive survey and measurements at the site. The examples of plants show the influence of overflow facilities on the dynamics of input flow and quality of wastewater, and a strong influence of the problems of the sewerage systems.

• 한국임상약학회지
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• 제23권3호
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• pp.248-255
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• 2013

Objective: This paper was aimed to investigate the current labelling trend of tar color additives in infant's drugs used in Korea and other countries. Method: The current labelling system of the tar color additives in infant's drugs was investigated using inserted papers for drug information of infant's drugs as well as three drug information internet sites popular in Korea including internet sites of foreign countries of USA, UK, Japan, and China for infant's drug information. Results: Among 325 drugs registered as syrup form for infant's drugs (sources, http://www.health.kr), 4 drugs indicated tar color related information on the internet and only 2 drugs indicated tar color additives' name. And from the investigated results of 76 inserted papers for infant's drug information, among 31 drugs containing tar dyes, in only 19 drugs the tar color additives' names were notated. Among 6 drugs which do not contain tar dyes, only 1 drug was notated as 'Dye-Free'. Conclusion: For advanced labelling system in Korea, we proposed the below guidelines. [1] The name of tar color additives used in infant's drugs should be notated even in drug information on internet sites. [2] All drug ingredients used in infant's drugs need to be separately notated as active and inactive species on both internet sites and inserted papers. [3] 'Dye-Free' notation should be mandatory for infant's drugs which do not contain tar color additives in drug information on the internet sites as well as inserted papers.

• 한국정보통신학회논문지
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• 제14권2호
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• pp.343-350
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• 2010

기존의 웹 서버 아키텍처 설계에서는 웹 서비스의 신뢰성, 견고성과 안전성을 유지하기 위하여 데이터 암호화(encryption) 기법을 사용하였다. 그러나 데이터 암호화 기법의 사용은 웹 서버의 처리량(throughput) 감소와 평균 응답 시간을 증가시키면서, CPU 작업을 낭비하기기 때문에 웹 어플리케이션 서버의 성능에 부정적인 영향을 나타낸다. 또한 최근의 웹 어플리케이션들은 안전한 인터넷 통신을 위하여 보안과 안전성을 요구하고 있다. 그러므로 본 논문에서는 안전한 웹 서비스를 위하여 기존의 웹 서버에 새로운 웹 서비스 모듈들을 추가하고 쓰레드 풀(Thread pool)과 Non-blocking I/O를 이용하는 개선된 웹 서버를 제안하고, 안전한 웹 서비스 성능을 나타내기 위하여 신뢰성과 안전성을 제공한다. 그리고 본 논문에서 제안한 웹 서버 시스템의 안전성과 성능을 평가하기 위하여 기존의 전형적인 톰캣 기반의 웹 서버와 제안 시스템에 대하여 실험을 통해 안전성과 성능을 비교 평가한다.

• 한국실내디자인학회논문집
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• 제25권2호
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• pp.123-130
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• 2016

Industrialization and Urbanization caused a great influx of rural population into the cities, which caused housing types to change from detached homes to more apartments homes. The official 2014's Statistics (http://kossir.kr) show that half (49.6%) of the Korean population live in apartment buildings and 37.5% live in detached houses. For this reason, the apartments have become the typical housing in Korea. So, the aim of this study is to compare and analyze the internal apartment space of Budang (New-Town) and Wirye (New-Town), since these Budang apartments are the first new-town housing and Wirye apartments are the last new-town housing in Korea. I have used the Convex Analysis of Space Syntax Program in analyzing the inside space of both of these locations' apartments. The results are as follows : First, the inside space of Wirye apartments have more convex space than that of the Budang apartments. Second, the common inside space of the Budang apartments were planned by integration space, on the other hand the inside space of Wirye apartments were planned by segregation space. Third, the master bedroom in both of the locations' apartments were analyzed for their strong integration space which they may have in common. The K (Kitchen) + D (Dining) space in Budang apartments are classified as integration space, on the other hand L (Living) + K + D space is also classified as integration space. The L+K+D space of the Wirye apartments is classified as integration space. Finally, the inside space of the Wirye apartments were planned more for various spaces than that of Budang apartments. The concept of master bedroom in both new-town was not planed for a couple privacy space but the heart of the family.

• 한국관개배수논문집
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• 제14권1호
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• pp.80-88
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• 2007

The Shuttle Radar Topography Mission (SRTM) obtained elevation data on a near-global scale to generate the most complete high-resolution digital topographic database of Earth. SRTM consisted of a specially modified radar system that flew onboard the Space shuttle SRTM consisted of a specially modified radar system that flew onboard the Space Shuttle Endeavour during an 11-day mission on February 2000. Since 2004, in a GLCF (Global Land Cover Facility, http;//glcf.umiacs.umd.edu/) web-site, products of SRTM including 1Km and 90m resolutions for outside US and a 30m resolution for the US have been provided. This study is to assess the accuracy of SRTM-DEM in comparing with NGIS-DEM generated from NGIS digital topographic map(1:25,000) in Guem river watershed. For the Geum river watershed, SREM-DEM elevation ranged from 0 to 1,605m and NGIS-DEM ranged from 6 to 1,610m, and the average elevation of SRTM-DEM was 226.7m and 218.9m for NGIS-DEM, respectively. NGIS-DEM was subtracted from SRTM in three zones -Zone I (0~100m), Zone II (100~400m), Zone III (over 400m)- to estimate difference between SRTM and NGIS-DEM. As the results, the differences of these DEM were 5.2m (11.6%) in Zone I, 8.8m (3.8%) in Zone II, 12.5m (2.1%) in Zone III. Although there were differences between SRTM-DEM and NGIS-DEM, SREM-DEM would be possible to be utilized as DEM data for the region where DEM is not prepared.

• 한방비만학회지
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• 제10권2호
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• pp.1-16
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• 2010

Objectives Obesity is one of the most important health problem in modern society and constant studies are still in progress domestically without the effective treatment so far. The objective of this study is to analyze the recent trend of the studies about obesity in oriental medicine and to provide background for further studies. Methods All of the articles in the journal of 'Korean oriental association for study of obesity' were collected published after 2006. Search were conducted through 'http://oasis.kiom.re.kr' and the journal of 'the Korean academy of oriental rehabilitation medicine'(January 2006~October 2010) with the search word "obesity". Collected articles were classified into clinical study, experimental study, literary study, case report. Results Total 177 articles were analysed. The number of studies were increasing until 2008 and went down afterwards. According to the classification by the type of study, percentage of clinical study took 45.2%, experimental study took 31.6%, literary study took 14.7%, case report took 8.5%. Conclusion Domestic clinical studies and experimental studies are conducted more focused on the treatment and diagnosis of obesity. Future study on the obesity should be focused on the prevention in the aspect of public health and social cost.

• 정보보호학회논문지
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• 제32권2호
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• pp.213-225
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• 2022

컨테이너 기술은 클라우드 환경에서 마이크로서비스의 효율적인 구축 및 운영을 가능하게 했지만, 심각한 보안 위협도 함께 가져왔다. 다수의 컨테이너가 서비스 구성을 위해 네트워크로 연결되기 때문에 공격자는 탈취한 컨테이너에서 네트워크 공격을 수행해 인접한 다른 컨테이너를 공격할 수 있다. 이러한 위협을 막기 위해 다양한 컨테이너 네트워크 보안 솔루션이 제안되었으나 성능적인 측면에서 많은 한계점을 갖고 있다. 특히 이들은 컨테이너 네트워크 보안에 필수적인 패킷 페이로드 검사 과정에서 매우 큰 네트워크 성능 저하를 일으킨다. 본 논문에서는 이러한 문제를 해결하기 위해 클라우드 환경을 위한 eBPF/XDP 기반 고속 패킷 페이로드 검사 시스템인 BPFast를 제안한다. BPFast는 별도의 유저 수준 컴포넌트 없이 커널 영역에서 컨테이너가 전송한 패킷의 헤더와 페이로드를 검사하여 컨테이너를 네트워크 공격에서부터 보호한다. 본 논문에서는 Kubernetes 환경에서 진행한 실험을 통해 BPFast 프로토타입이 Cilium, Istio 등 최신 솔루션보다 최대 7배 더 빠르게 동작할 수 있음을 증명했다.

• International Journal of Computer Science & Network Security
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• 제23권2호
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• pp.199-202
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• 2023

Carriage return (CR) and line feed (LF), also known as CRLF injection is a type of vulnerability that allows a hacker to enter special characters into a web application, altering its operation or confusing the administrator. Log poisoning and HTTP response splitting are two prominent harmful uses of this technique. Additionally, CRLF injection can be used by an attacker to exploit other vulnerabilities, such as cross-site scripting (XSS). Email injection, also known as email header injection, is another way that can be used to modify the behavior of emails. The Open Web Application Security Project (OWASP) is an organization that studies vulnerabilities and ranks them based on their level of risk. According to OWASP, CRLF vulnerabilities are among the top 10 vulnerabilities and are a type of injection attack. Automated testing can help to quickly identify CRLF vulnerabilities, and is particularly useful for companies to test their applications before releasing them. However, CRLF vulnerabilities can also lead to the discovery of other high-risk vulnerabilities, and it fosters a better approach to mitigate CRLF vulnerabilities in the early stage and help secure applications against known vulnerabilities. Although there has been a significant amount of research on other types of injection attacks, such as Structure Query Language Injection (SQL Injection). There has been less research on CRLF vulnerabilities and how to detect them with automated testing. There is room for further research to be done on this subject matter in order to develop creative solutions to problems. It will also help to reduce false positive alerts by checking the header response of each request. Security automation is an important issue for companies trying to protect themselves against security threats. Automated alerts from security systems can provide a quicker and more accurate understanding of potential vulnerabilities and can help to reduce false positive alerts. Despite the extensive research on various types of vulnerabilities in web applications, CRLF vulnerabilities have only recently been included in the research. Utilizing automated testing as a recurring task can assist companies in receiving consistent updates about their systems and enhance their security.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.652-654
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• 2021

본 연구에서는 경추부위 멕켄지운동에 관한 결과를 체계적 고찰함으로써 멕켄지 운동에 대한 근거를 마련하고자 하였다. 2015년부터 2021년 6월까지 출판된 국내논문을 대상으로 하였다. 논문의 검색을 위한 데이터베이스 검색엔진은 국내의 표적 검색원인 한국 학술정보와 한국교육학술정보원(KERIS)가 운영하는 학술연구정보서비스 RISS(http://www.riss4u.net)에서 인터넷을 통하여 실시하여 8편의 논문을 분석하였다. 본 연구에서 분석된 8편의 국내 논문은 실험군1을 포함하는 8편의 논문 중 맥켄지 운동을 적용한 논문은 4편, 어깨안정화 운동을 적용한 논문이 3편이었고, 멀리건 운동을 적용한 논문이 1편이었다. 실험군 2를 포함하는 6편의 논문 중 맥켄지 운동만 적용한 논문은 4편, 멀리건 운동을 함께 적용한 논문이 1편, 카이로프랙틱을 함께 적용한 논문이 1편이었다. 운동 효과를 평가한 관절가동범위에 관한 논문은 3편과 두개척추각을 평가한 관한 논문은 2편에서도 유의한 차이를 보였다. 경추 자세에 관한 논문은 1편과 거리 변화에 관한 논문은 1편에서 멕켄지 운동에 대한 효과를 보였다. 근활성도에 관한 논문은 4편 중 근육마다 멕켄지만 적용한 그룹보다 멕켄지와 다른 운동을 동시에 같이 시행한 실험군이 대조군에 비해 유의한 차이를 보였으며 통증에 관한 논문 4편에서도 멕켄지만 적용한 그룹보다 멕켄지와 다른 운동 특히 카이로프랙틱을 적용한 실험군이 대조군에 비해 유의한 차이를 보였다. 이에, 본 연구에서는 경추부위에 멕켄지 운동은 통증, 근활성도, 관절가동범위, 경추자세등에서 그 효과를 증명하였다.

• Clinical and Experimental Pediatrics
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• 제51권1호
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• pp.33-41
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• 2008

목 적 : 소아 청소년 건강관리에서 혈압 측정의 중요성이 점차 강조되고 있는 시점에서 한국의 소아 청소년들을 위한 정상 혈압 참고 치를 만들고자 하였다. 방 법 : 2005년에 새로운 신체성장 표준치를 만들기 위해 시행한 전국 소아 청소년들의 신체계측사업에 혈압 계측사업을 포함시켜 7-20세에 해당하는 소아 청소년 57,433명(남: 29,443명, 여: 27,990명)에서 신장, 체중 및 혈압 계측치를 얻었다. 혈압은 자동 진동혈압계인 Dinamap Procare 200(GE Inc., Milwaukee, Wi, USA)를 이용하여 측정하였고 앉은 자세에서 안정한 후 우측 팔에서 5분 간격으로 2번 측정하였다. 두 측정치의 평균치를 수축기 혈압과 이완기 혈압으로 기록하여 원 자료로 하였다. 체중이 +3SD 이상인 과체중아들 2,373명의 혈압은 제외하고 분석 하였다. 혈압 백분위수 표는 성별, 연령별, 신장 백분위수별로 만들어 졌으며 통계기법은 2004 Task Force in NHLBI (USA)이 사용한 통계기법을 원용한 고정 변형 LMS 방법을 사용하였다. 결 과 : 성별, 연령별(7-18세), 신장 백분위수별(5th, 10th, 25th, 50th, 75th, 90th, 95th) 혈압 참고치가 완성되었으며 신장 백분위수에 대한 자료는 질병관리본부 홈페이지인 http://www.cdc.go.kr/webcdc/에서 확인 할 수 있다. 고혈압의 기준치는 성별, 연령별, 신장대비에서 95 백분위수 이상으로 하고, 전고혈압 기준치는 90-95 백분위수 또는 수축기 및 이완기 혈압 130/80 mmHg 이상으로 정하였다. 결 론 : 이번에 마련된 우리나라 소아 청소년 정상 혈압 참고치는 처음이기 때문에 사용기준 및 고혈압의 기준은 앞으로 지속적인 논의와 연구가 필요할 것으로 생각된다. 또한 본 혈압 표는 자동 진동혈압계로 마련된 것이기 때문에 수동 수은 혈압계를 이용한 혈압 치를 평가하는 기준표로 사용하는 것은 주의해야 할 것이다.