세그먼트 트리를 이용한 IP 주소 검색

이인복,박근수,최양희,정성권,Lee, In-Bok,Park, Geun-Su,Choe, Yang-Hui,Jeong, Seong-Gwon 한국정보과학회 2001 정보과학회논문지 : 시스템 및 이론 Vol.28 No.11

IP 주소 검색 문제는 IP 주소에 대해서 매칭되는 길이가 가장 IP 접두사를 라이팅 테이블로부터 찾는 것으로서, 인터넷의 고속화에 장애가 되어 왔다. 본 논문에서는 세그먼트 트리라는 자료 구조를 이용하여 이 문제에 대한 새로운 알고리즘을 제시한다. 본 논문에서는 제시하는 알고리즘은 n개의 접두사가 주어졌을 때 Ο(log n) 시간에 IP 접두사를 검색할 수 있다. 또 기존의 알고리즘에서 문제가 되었던 IP 접두사의 삽입과 삭제 연산을 자료 구조 전체를 다시 만들지 않고 효율적으로 처리한다. The IP address lookup problem is to find the longest matching IP prefix for a given IP address from the routing table and has been a central bottleneck in speeding up the Internet. In this paper, we propose a new algorithm for this problem based on the segment tree data structure. Given n IP prefixes, our algorithm can do IP address in Ο(log n) time. It also handles the insertion and deletion of IP prefixes efficiently without rebuilding the total data structure.

축산시설의 미세먼지 배출계수 프로토콜 관련 세계동향

이인복,Lee, In-Bok 한국농공학회 2020 韓國農工學會誌 : 전원과 자원 Vol.62 No.2

시그니처 기반 침입 탐지 시스템의 최적화

이인복,오성일,Lee, In-Bok,O, Seong-Il 한국정보과학회 2015 정보과학회지 Vol.33 No.6

공기 중 바이러스 포집 장비의 효율성 평가

하태환,이인복,권경석,이성복,송상현,윤순식,Ha, Tae-Hwan,Lee, In-Bok,Kwon, Kyeong-Seok,Lee, Sung-Bok,Song, Sang-Hyeon,Bitog, Jessie. P.,Yoon, Soon-Seek 한국농공학회 2012 한국농공학회논문집 Vol.54 No.1

In livestock industry, damage caused by the epidemic diseases such as Foot-and-Mouth Disease (FMD), Highly-Pathogenic-Avian-Influenza (HPAI) and Porcine-Reproductive-and-Respiratory-Syndrome (PRRS) was very serious. The financial loss incurred from FMD alone which occurred on Nov. 2011 in Korea was estimated at 3 billion won, 23 % of annual livestock industry production. The livestock industry in Korea has greater risk of disease infection because of high density production, etc. Investigating the spread of livestock diseases should consider both direct and indirect contact as well as other various factors including airborne. Airborne infection of livestock disease was first hypothesised in the early 1900s, however, field experimental studies are still limited. Furthermore, no protocol is available in detecting airborne viruses in the field. In this study, effective virus samplers were investigated by comparative analysis of the type of samplers used detect to airborne virus. Laboratory experiments were conducted to compare virus samplers such as Bio-sampler, Dust-sampler, Compact-Cascade-Impactor (CCI) and Microflow in detecting PRRSV. Samples were analyzed by Reverse-Transcription PCR to assess the efficiency of the instrument in detecting the airborne virus. First, samples were classified into five levels according to light intensity of gel images and then the classified results were normalized. In every case, Bio-sampler and Dust-sampler were comparable with each other and have shown to be more effective than CCI and Microflow samplers.

윈치커튼식 계사의 시기 및 작업자 출입에 따른 분진 발생 농도 측정 연구

조예슬,권경석,이인복,하태환,박세준,김락우,여욱현,이상연,이승노,Jo, Ye-seul,Kwon, Kyeong-seok,Lee, In-bok,Ha, Tae-hwan,Park, Se-jun,Kim, Rack-woo,Yeo, Uk-hyeon,Lee, Sang-yeon,Lee, Seung-no 한국농공학회 2015 한국농공학회논문집 Vol.57 No.6

Improvement in domestic poultry production has a positive effect on the export competitiveness of the poultry industry. However, overproduction and enlargement of facilities to assure a supply increase a stocking density which make a poor environment in the broiler house. In particular, an intensive rearing environment is vulnerable to dust control that causes respiratory diseases, such as asthma, bronchitis, etc., to farmers and broilers. However, monitoring data and research for environment control are not adequate, and there are no air quality regulations in broiler houses in Korea. In this study, TSP, PM10, inhalable dust and respirable dust concentration were monitored according to season, age of broiler and broiler's activities. Air quality assessment was also performed in accordance with the threshold limit value by Donham et al. (2000). The TSP concentrations were 77.5 %, 219.7 % higher and PM10 concentrations were 121.2 %, 303.8 % higher when change of season and winter respectively than summer. There were significantly different concentrations according to season and age of broiler. Inhalable and respirable dust concentration were also clearly different according to the season and age of broiler. A high dust concentration was observed, specifically exceeding the threshold limit by 119 % in the winter. In the case of the broiler's motion was activity according to worker's access into the broiler house, concentration level was 769.6 % higher than broiler's motion was stable and exceeded the threshold limit. These results suggest that the worker should put on protective equipment to protect there's respiratory health in the broiler house.

돈분 액비 관비가 오이의 생육 및 토양화학성에 미치는 영향

박진면(Jin Myeon Park),임태준(Tae Jun Lim),이성은(Seong Eun Lee),이인복(In Bok Lee) 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.2

본 연구는 시설 하우스 재배에서 돈분뇨 액비와 화학비료의 관비처리가 오이 생육, 무기성분 함량, 수량, 양분흡수량 및 이용률, 토양 화학성에 미치는 영향을 알아보기 위하여 수행되었다. 오이 재배 양식은 반촉성과 억제재배이며 시험 처리는 무비, 질소 기준으로 돈분뇨 액비 26 mg L<SUP>-1</SUP>, 52 mg L<SUP>-1</SUP> 및 화학비료 52 mg L<SUP>-1</SUP> 4처리를 하였다. 돈분뇨 액비와 화학비료 처리는 초장에 차이가 없으나 돈분뇨 액비 26 mg L<SUP>-1</SUP> 처리에서 줄기와 뿌리의 생체중과 건물중이 많았다. 잎의 칼슘함량은 돈분뇨 액비 처리에서 낮았으며 뿌리의 칼륨함량은 화학비료 52 mg L<SUP>-1</SUP> 처리에서 낮았다. 줄기의 칼슘함량은 화학비료 52 mg L<SUP>-1</SUP>에서 가장 낮았고 과실의 무기성분 함량은 처리간에 차이가 없었다. 돈분뇨 액비 및 화학비료를 처리에서 총수량은 반촉성재배에서 화학비료 52 mg L<SUP>-1</SUP> 처리가 적었으며 비상품과 수량은 돈분뇨 액비 처리에서 적었다. 양분 이용률은 질소 4.2~13.0%, 인산은 1.9~2.0%, 칼륨은 8.3~30.9%로 칼륨, 질소,인산 순이다. 토양 화학성 중 pH는 돈분뇨 액비 처리가 화학비료 처리보다 높았고 EC 및 질산태 질소함량은 화학비료 처리가 돈분뇨 액비 처리보다 많았다. 치환성 칼륨함량은 돈분뇨 액비 52 mg L<SUP>-1</SUP> 처리구가 높았으며 칼슘과 마그네슘은 처리간에 차이가 없었다. 결과적으로 오이 관비 재배에서 토양 검정에 의한 돈분뇨 액비 시용은 화학비료 질소와 칼리를 대체할 수 있을 것으로 판단되었다. This study was conducted to evaluate fertigation effects of pig slurry (PS) and chemical fertilizer (CF) in cucumber by investigating the growth and yield, nutrient content and uptake, nutrient use efficiency, and soil characteristics in greenhouse cultivation. The cropping patterns of cucumber were semi-forcing culture and retarding culture, and the experiment involves four treatments: No fertilizer (NF), 26 mg L<SUP>-1</SUP> and 52 mg L<SUP>-1</SUP> of N application by slurry composting biofiltration liquefied fertilizer (SCBLF), and 52 mg L<SUP>-1</SUP> of N treatment by chemical fertilizer. The difference on the plant height of cucumber between SCBLF and CF treatments was no significant, but fresh weight and dry weight of stem and root were higher in 26 mg L<SUP>-1</SUP> SCBLF treatment. The Ca content of the leaf was lower in the treatments of SCBLF and the K content of the root was lower in the 52 mg L<SUP>-1</SUP> CF treatment. The Ca content of the stem was lowest in the 52 mg L<SUP>-1</SUP> CF treatment and the mineral content of the fruit showed no significant difference. In case of semi-forcing culture, the gross yield was lower in the 52 mg L<SUP>-1</SUP> CF treatment and the yield of unmarketable fruit was lower in the SCBLF treatments. The nutrient use efficiency of cucumber is as follows: K (8.3 ~ 30.9%), N (4.2 ~ 13.0%), P (1.9 ~ 2.0%). The SCBLF treatments showed higher figure in the soil pH than that of the CF treatment, while EC and the content of NO₃-N were higher in the CF treatment than the former. The content of exchangeable K was higher in the plot treated with 52 mg L<SUP>-1</SUP> SCBLF, and there were no significant differences in the content of Ca and Mg between the treatments. In conclusion, it is suggested that the application of liquefied manure made from pig slurry may be able to replace the use of chemical fertilizer in nitrogen and potassium.

돈분 액비 관비가 토마토의 수량 및 토양화학성에 미치는 영향

박진면(Jin-Myeon Park),임태준(Tae-Jun Lim),강석범(Seok-Boem Kang),이인복(In-Bok Lee),강윤임(Yun-Im Kang) 한국토양비료학회 2010 한국토양비료학회지 Vol.43 No.5

시설 하우스 토마토재배에서 돈분뇨 액비와 화학비료의 관비 처리 효과를 알아보기 위하여 무비, 질소 기준으로 돈분뇨 액비 26 mg L<SUP>-1</SUP>, 52 mg L<SUP>-1 </SUP>및 화학비료 52 mg L<SUP>-1</SUP> 4처리를 하여 토마토 수량, 생육, 무기성분함량, 양분흡수량, 양분이용률 및 토양 화학성에 미치는 영향을 알아보았다. 돈분뇨 액비와 화학비료 관비 처리는 수량과 생육에 차이가 없었으며 돈분뇨 액비 26 mgL<SUP>-1</SUP> 처리에서 수량이 감소하는 경향을 보였다. 돈분뇨 액비와 화학비료 처리에 비해 잎과 뿌리의 질소와 칼륨함량은 무비에서 낮았으나 뿌리와 줄기의 인산함량은 무비에서 높았다. 칼슘함량은 잎에서 처리간에 차이가 없었으나 뿌리와 줄기는 돈분뇨 액비 52 mg L<SUP>-1</SUP> 처리가 높았고 과실내 칼슘함량은 화학비료 52 mg L<SUP>-1</SUP> 처리가 낮았다. 양분 이용률은 질소 15.8~36.7%, 인산은 3.0~6.3%, 칼륨은 29.2~43.3%로 칼륨, 질소, 인산 순으로 낮았다. 토양 화학성 중 pH는 돈분뇨 액비 처리가 화학비료 처리보다 높았고 질산태 질소함량은 화학비료 처리가 돈분뇨 액비 처리보다 증가하였다. 치환성 칼륨함량은 돈분뇨 액비와 화학비료 52 mg L<SUP>-1 </SUP>처리구가 높았으며 칼슘과 마그네슘은 처리간에 차이가 없었다. 결과적으로 토마토 관비 재배에서 토양 검정에 의한 돈분뇨 액비 시용은 화학비료 질소와 칼리를 대체하여 이용할 수 있을 것으로 판단되었다. This study was conducted to evaluate fertigation effects of pig slurry (PS) and chemical fertilizer (CF) in tomato by analyzing the growth and yield, nutrient content and uptake, nutrient use efficiency, and soil characteristics in greenhouse cultivation. The treatments compared were; no-fertilizer, two different levels of PS (26 mg L<SUP>-1</SUP> and 52 mg L<SUP>-1</SUP>), and a control treatment of chemical fertilizer. There was no significant difference in growth and yield between PS and CF treatments. however, yield reduction was observed in PS 26 mg L<SUP>-1</SUP> treatment. The N-utilization efficiency in CF treatment was similar to that of PS 52 mg L<SUP>-1</SUP> treatment. Nutrient utilization efficiency decreased in order of potassium (K), nitrogen (N), phosphate (P) with 29.2~43.3% in K, 15.8~36.7% in N, and 3.0~6.3% in P. In soil chemical characteristics, soil pH in PS treatment was higher than in CF treatment. In contrast, nitrate content in soil was higher in CF treatment than in PS treatment. The content of exchangeable K in soil was higher in PS and CF 52 mg L<SUP>-1</SUP> treatments. There was no significant difference in exchangeable Ca and Mg among those treatments. Therefore, it can be concluded that chemical fertilizers can be substituted by PS based on soil chemical analysis in tomato fertigation culture.

석유화학공장의 위험성 관리에 의한 장외영향평가에 관한 연구

이인복 ( In-bok Lee ),황명환 ( Myung-hwan Hwang ),신용태 ( Young-tai Shin ),우인성 ( In-sung Woo ) 한국리스크관리학회 2017 리스크 管理硏究 Vol.28 No.1

석유화학공장과 같은 복합시설은 다양한 장치설계와 공정으로 이루어지고 있어 많은 사고발생 가능요인을 내포하고 있지만, 위험을 관리하는 수준은 최고단계를 유지하고 있어 안전관리 수준은 매우 높다고 할 수 있다. 하지만 위험을 원초적으로 제거할 수는 없기에 이를 대비한 안전관리 수준향상에 대한 끊임없는 노력이 항상 수반되어야 한다. 이런 시설에서 만일, 사고가 발생한다면 피해영향 범위가 On-site에서 Off-site로 확대되어 인근지역의 피해를 야기할 수 있어 이에 대한 대책마련이 우선 되어야 한다. 실제 사례로 `12년 발생한 구미 불산 사고로 인하여 인근지역의 인명 및 재산 등 막대한 피해를 발생시킴으로서 화학물질 사고에 대한 안전문제가 사회적 이슈로 떠오르고 있다. 화학물질 사고가 지속적으로 발생됨에 따라 주민과 정부, 대기업의 갈등이 사회적인 문제를 일으키고 있어 이에 대한 해결책을 마련하고자 정부에서는 장외영향평가를 도입하여 실시하고 있으나 고용노동부에서 시행하고 있는 공정안전관리제도와의 중복성 문제, 정량적 위험성 평가 방법의 신뢰성 부족 등 제도의 성공적인 정착을 위한 체계적인 제도운영의 필요성이 강조되고 있다. 또한 위험시설물의 신규 설립 및 증축시 사업 운영주체와 주변지역의 주민들과 마찰을 빚고 있으며 이를 관리하는 부처에서도 처리인력의 전문성 부재와 관련법이 미비하여 사업승인에 어려움을 겪고 있다. 이에 본 연구에서는 석유화학공장의 위험성 관리를 위하여 실시되는 장외영향평가의 실효성을 높이기 위하여 기술적, 제도적 접근을 통한 해결책을 제시하고자 한다. Although complex facilities such as petrochemical plants are composed of various device designs and processes, there are many possible causes of accidents. However, the level of risk management is at the highest level and safety management level is very high. However, since the risk can not be eliminated at the outset, there is always a constant effort to improve the level of safety management. In such a facility, if an accident occurs, the extent of the damage may be extended from the on-site to the off-site, causing damage to the nearby area.As a practical case, the safety problem of chemical accidents is emerging as a social issue by causing enormous damage such as human life and property in the neighboring area due to Gumi HF accident that occurred for 12 years. As the chemical accidents continue to occur, conflicts between residents, governments, and large corporations are causing social problems. The government has introduced Off-Site Consequence Analysis in order to solve these problems. but The need for a systematic system for the successful settlement of the system is emphasized the process safety management system implemented by the Ministry of Employment and Labor Redundancy problem, Lack of reliability of quantitative risk assessment method etc. In addition, when establishing or expanding risk facilities, it is in conflict with the residents of the project management and the surrounding area, and the ministries that manage them have difficulty in approving the project due to lack of expertise and related laws. Therefore, this study suggests a solution through the technical and institutional approach to enhance the effectiveness of Off-Site Consequence Analysis for the risk management of petrochemical plants.

축산악취 확산의 정성적 및 정량적 예측을 위한 공기유동학적 모델 개발 (1) 축산악취 확산 정도 조사 및 이의 영향 요인 규명

이인복 ( Lee In Bok ),홍세운 ( Hong Se Woon ),황현섭 ( Hwang Hyun Sup ),서일환 ( Seo Il Hwan ),유재인 ( Ru Jae In ),하태환 ( Ha Tae Hwan ),권경석 ( Kwan Hyung Suk ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-

Odor is one of the major nuisances in the environment. Especially, odor annoyance from livestock production is an increasing problem in communities in many countries. In order to reduce the odor inconvenience and establish good relations between livestock industry and surrounding communities, many studies on the odor dispersion, such as field experiment and diffusion simulation, have been investigated. Especially, CFD being used widely will be effective for aerodynamic analysis with consideration for various wind conditions as well as topographical conditions. Therefore the ultimate objective is to develop the aerodynamic model for predicting qualitative and quantitative diffusion of livestock odor, and in this study, phenomena and factors of livestock odor diffusion were investigated previously.

전산유체역학을 이용한 표준 오리사 설계안에 대한 환기효율성 분석

여욱현,조예슬,권경석,하태환,박세준,김락우,이상연,이승노,이인복,서일환,Yeo, Uk-Hyeon,Jo, Ye-Seul,Kwon, Kyeong-Seok,Ha, Tae-Hwan,Park, Se-Jun,Kim, Rack-Woo,Lee, Sang-Yeon,Lee, Seung-No,Lee, In-Bok,Seo, Il-Hwan 한국농공학회 2015 한국농공학회논문집 Vol.57 No.5

In Korea, 69.4 % of duck farms had utilized conventional plastic greenhouses. In this facilities, there are difficulties in controlling indoor environments for raising duck. High rearing density in duct farms also made the environmental control difficult resulting in getting more stressed making their immune system weaker. Therefore, a facility is needed to having structurally enough solidity and high efficiency on the environmental control. So, new design plans of duck house have recently been conducted by National Institute of Animal Science in Korea. As a study in advance to establish standard, computational fluid dynamics (CFD) was used to estimate the aerodynamic problems according to the designs by means of overall and regional ventilation efficiencies quantitatively and qualitatively. Tracer gas decay (TGD) method was used to calculate ventilation rate according to the structural characteristics of duck houses including installation of indoor circulation fan. The results showed that natural ventilation rate was averagely 164 % higher than typically designed ventilation rate, 1 AER ($min^{-1}$). Meanwhile, mechanically ventilated duck houses made 81.2 % of summer ventilation rate requirement. Therefore, it is urgent to develop a new duck house considering more structural safety as well as higher efficiency of environmental control.