K리그 축구 경기에서 나타난 상황 요인 별 주요 공격 분석인자의 상대성 분석

김종원 ( Kim¸ Jongwon ),최형준 ( Choi¸ Hyongjun ) 한국체육학회 2021 한국체육학회지 Vol.60 No.1

본 연구는 2020 K리그 경기에서 발생한 주요 공격 인자들을 수집하고 이를 상황 요인(경기 장소, 상대팀 수준, 최근 팀 경기력, 최근 상대팀 경기력) 별 상대성 분석을 하고자 하였다. 본 연구에서는 2020 K리그 모든 팀들의 전 경기(스플릿 후 경기 제외)를 대상으로 하였으며, 연구의 대상이 된 경기 수는 132경기였다. 자료 수집을 위해 한국프로축구연맹에서 제공하는 ‘데이터포탈’의 공식 자료를 사용하였고, 자료를 정리하기 위해 1차적으로 Microsoft Office Excel 2007을 이용하였다. 통계 분석은 IBM SPSS 25.0을 이용하였으며, 정규성 분포를 이루지 않아 비모수 통계 기법인 Mann-Whitney U 검정법과 Kruskal-Wallis H 검정법을 이용하여 평균 차이를 비교 분석하였다. 본 연구에서 나타난 결과는 첫째, K리그 팀들은 홈에서 경기를 할 때가 원정에서 경기를 할 때보다 더 높은 볼 점유율을 기록했고(α<.05), 둘째, 강팀을 상대로 경기할 때가 중팀과 약팀을 상대로 할 때보다 더 적은 슛, 유효 슛, 패스, 전진 패스와 낮은 볼 점유율을 기록했으며(α<.05), 셋째, 팀의 최근 경기력이 좋을 때와 상대팀의 경기력이 좋지 않을 때 더 많은 패스, 전진 패스와 높은 볼 점유율을 기록했다(α<.05). The aim of this study was to identify the effect of situational variables e.g. match venue, opposition quality, current form, current opposition’s form on key attacking performance indicators from 2020 Korea Football League. All match(n=132) excepted for split matches were used for analysis and the data were provided by Korea Professional Football League(data.kleague.com). Microsoft Office Excel 2007 was used to collect data and the data were analysed in IBM SPSS 25.0 to determine differences between independent variables. Normality tests were firstly conducted and Mann-Whitney U test and Kruskal-Wallis H test was conducted as a non-parametric statistics method. The results showed that ball possessions were significantly different between home and away teams whilst all key attacking performance indicators were significantly different according to different quality of team. Also, there were significant differences in passes, forward passes and ball possessions among current team forms and opposition team forms.

Assessment of a Pre-conceptual Design of a Spent PWR Fuel Disposal Container

Jongwon Choi,Dong-Keun Cho,Yang Lee,Heui-Joo Choi,Jong-Youl Lee 한국방사성폐기물학회 2006 방사성폐기물학회지 Vol.4 No.1

본 연구에서는 사전연구로부터 사용후핵연료의 처분용기 원형모델로 제안된 처분용기의 전체 크기와 배열을 평가하기 위하여 일련의 공학적 분석을 수행하였다. 그러한 노력의 결과 용기 내부 저장통의 배열형태와 외곽쉘과 상하부 뚜껑의 두께와 같은 새로운 설계변수를 도출하였다. 공학적 분석 작업에는 처분용기의 기계구조 해석 결과를 근거로 도출된 용기의 규격자료에 대한 방사선 안전성 측면에서의 타당성을 검토하기 위하여 방사선차폐 해석과 핵 임계 해석 등이 수행되었다. 처분용기 내부 삽입체의 직경 변화에 따른 구조안정성 해석 결과에 따르면, 직경 102cm 일 때 극한 외압조건은 물론 정상적인 외압조건 하에서도 최대 Von Mises 응력이 안전계수 2.0을 만족하는 것으로 나타났다. 이 경우에서도 핵 임계 및 방사선차폐 해석 결과 안전기준치를 만족시키며, 무게는 20톤 가량 줄어드는 효과가 있는 것으로 나타났다. In this paper, sets of engineering analyses were conducted to renew the overall dimensions and configurations of a disposal container proposed as a prototype in the previous study. Such efforts and calculation results can provide new design variables such as the inner basket array type and thickness of the outer shell and the lid & bottom of a spent nuclear fuel disposal container. These efforts include radiation shielding and nuclear criticality analyses to check to see whether the dimensions of the container proposed from the mechanical structural analyses can provide a nuclear safety or not. According to the results of the structural analysis of a PWR disposal container by varying the diameter of the container insert, the Maximum Von Mises stress from the 102 cm-container meets the safety factor of 2.0 for both extreme and normal load conditions. This container also satisfies the nuclear criticality and radiation safety limits. This decrease in the diameter results in a weight loss of a container by 20 tons.

DEVELOPMENT OF GEOLOGICAL DISPOSAL SYSTEMS FOR SPENT FUELS AND HIGH-LEVEL RADIOACTIVE WASTES IN KOREA

Choi, Heui-Joo,Lee, Jong Youl,Choi, Jongwon Korean Nuclear Society 2013 Nuclear Engineering and Technology Vol.45 No.1

Two different kinds of nuclear power plants produce a substantial amount of spent fuel annually in Korea. According to the current projection, it is expected that around 60,000 MtU of spent fuel will be produced from 36 PWR and APR reactors and 4 CANDU reactors by the end of 2089. In 2006, KAERI proposed a conceptual design of a geological disposal system (called KRS, Korean Reference disposal System for spent fuel) for PWR and CANDU spent fuel, as a product of a 4-year research project from 2003 to 2006. The major result of the research was that it was feasible to construct a direct disposal system for 20,000 MtU of PWR spent fuels and 16,000 MtU of CANDU spent fuel in the Korean peninsula. Recently, KAERI and MEST launched a project to develop an advanced fuel cycle based on the pyroprocessing of PWR spent fuel to reduce the amount of HLW and reuse the valuable fissile material in PWR spent fuel. Thus, KAERI has developed a geological disposal system for high-level waste from the pyroprocessing of PWR spent fuel since 2007. However, since no decision was made for the CANDU spent fuel, KAERI improved the disposal density of KRS by introducing several improved concepts for the disposal canister. In this paper, the geological disposal systems developed so far are briefly outlined. The amount and characteristics of spent fuel and HLW, 4 kinds of disposal canisters, the characteristics of a buffer with domestic Ca-bentonite, and the results of a thermal design of deposition holes and disposal tunnels are described. The different disposal systems are compared in terms of their disposal density.

Anti - rheumatoidal Effect of Sulfuretin Isolated from the Heartwood of Rhus veniciflua in Rats and Mice

Jongwon Choi,Byung-Jae Yoon,Keun Huh,Kun-Young Park,Kyung-Tae Lee,Hee-Juhn Park 한국식품영양과학회 2002 Preventive Nutrition and Food Science Vol.7 No.4

The present study was undertaken to evaluate the anti-rheumatoidal arthritis effect of the R. verniciflua heartwood extract, its EtOAc fraction, and its primary flavonoids, sulfuretin and fustin. All test samples showed variably significant inhibitory effects on hind paw edema and trypsin inhibitor activity induced by Freund's complete adjuvant reagent (FCA reagent), and on vascular permeability caused by acetic acid. Treatment with 10 mg/kg (i.p.) sulfuretin for seven days inhibited edema formation by 54.2±3.0%. Test samples, especially sulfuretin, shifted the values of biochemical parameters such as serum-cholesterol, serumtriglyceride and serum-total protein toward the normal and restored the numbers of leucocytes and platelets. These results suggest that the heartwood of R. verniciflua reduces immunological injuries caused by FCA reagent provides evidence that suluretin is an active anti-rheumatoid arthritis agent.

High-speed High-performance Visual Tracker via Correlation Filter with Compressed Deep Feature

Jongwon Choi,Kyuewang Lee,Jiyeoup Jeong,Jin Young Choi 제어로봇시스템학회 2018 제어로봇시스템학회 국제학술대회 논문집 Vol.2018 No.10

This paper introduces a context-aware correlation filter based tracker to achieve both high speed and high performance. We achieve high speed via deep feature compression based on a context-aware scheme utilizing multiple expert auto-encoders. To achieve high performance with the compressed feature map, we introduce extrinsic denoising processes and a new orthogonality loss term for pre-training and fine-tuning of the expert auto-encoders. In experiments, the proposed tracker is verified to achieve a comparable performance to state-of-the-art with running at over 100 fps.

A lifetime enhancing and QoS provisioning routing protocol for wireless sensor networks

Jongwon Choi,Sehun Kim 한국경영과학회 2008 한국경영과학회 학술대회논문집 Vol.2008 No.5

A wireless sensor network typically consists of a very large number of small, inexpensive, disposable, robust, and low-power sensor nodes working cooperatively. In this paper, we propose a routing protocol for wireless sensor networks, which focuses on satisfying QoS constraints while maximizing the lifetime of the networks. Our proposed protocol enhances the network lifetime by distributing the traffic flow over multiple paths, while satisfying the different QoS requirements in a dynamic and decentralized manner. Simulation shows that the network lifetime increases without compromising QoS requirements and throughput.

Antinociceptive Anti-inflammatory Effect of Monotropein Isolated from the Root of <i>Morinda officinalis</i>

Choi, Jongwon,Lee, Kyung-Tae,Choi, Moo-Young,Nam, Jung-Hwan,Jung, Hyun-Ju,Park, Sun-Kyu,Park, Hee-Juhn Pharmaceutical Society of Japan 2005 BIOLOGICAL & PHARMACEUTICAL BULLETIN Vol.28 No.10

<P>The root of <I>Morinda officinalis</I> (Rubiaceae) is used to treat rheumatoid arthritis and impotence in the traditional Oriental medicine. To identify the antinociceptive anti-inflammatory components of this crude drug, we adopted an activity-directed fractionation approach. The active fraction of the BuOH extract of <I>M. officinalis</I> root was subjected to silica gel and ODS column chromatography to yield two diterpenes, compounds 1 and 2 and these were identified as monotropein and deacetylasperulosidic acid, respectively. The iridoid glycoside, monotropein, was tested for its anti-inflammatory antinociceptive effects using hot plate- and writhing antinociceptive assays and by using carrageenan-induced anti-inflammatory assays in mice and rats. Pretreatment with monotropein (at 20, 30 mg/kg/d, <I>p.o.</I>) significantly reduced stretching episodes and prolonged action time in mice. It also significantly reduced acute paw edema by carrageenan in rats. These results indicate that monotropein contributes to the antinociceptive and anti-inflammatory action of <I>Morinda officinalis</I> root.</P>

Anti-Rheumatoid Arthritis Effect of the Kochia scoparia Fruits and Activity Comparison of Momordin Ic, its Prosapogenin and Sapogenin

Choi, Jongwon,Lee, Kyung-Tae,Jung, Hyun-Ju,Park, Hee-Sun,Park, Hee-Juhn The Pharmaceutical Society of Korea 2002 Archives of Pharmacal Research Vol.25 No.3

MeOH extract of Kochia scoparia was fractionated into $CHCl_3-$, EtOAc- and BuOH extracts and the last fraction were hydrolyzed by 3%-NaOH ($MeOH-H_2O$) to compare the bioactivities on antinociceptive and anti-inflammatory effects. Silica gel column chromatography of BuOH fraction afforded a large amount of $3-Ο-{\beta}-D-xylopyranosyl {\;}(1{\rightarrow}3)-{\beta}-D-glucuronopyranosyl$ oleanolic acid (momordin Ic, 4) and that of acid hydrolysate of BuOH fraction gave $3-Ο-{\beta}-D-glucuronopyranosyl oleanolic$ acid (momordin Ib, 3), its 6'-Ο-methyl ester (2) and oleanolic acid (1). Silica gel column chromatography of alkaline hydrolysate afforded a large amount of 4. MeOH extract and both EtOAc- and BuOH fractions were active in the rheumatoidal rat induced Freund's complete adjuvant reagent (FCA) whereas $CHCl_3$ fraction was inactive. Compound 1 and 4 showed significant activities in the same assay but oleanolic acid 3-Ο-glucuronopyranoside (3) showed no activity. These fashions were also observed in carrageenan-induced edema of the rat and in the antinociceptive activity tests undertaken in hot plate- and writhing methods. These results suggest that momordin Ic and its aglycone, oleanolic acid, could be active principles for rheumatoid arthritis.

A lifetime enhancing and QoS provisioning routing protocol for wireless sensor networks

Jongwon Choi,Sehun Kim 대한산업공학회 2008 대한산업공학회 춘계학술대회논문집 Vol.2008 No.5

A wireless sensor network typically consists of a very large number of small, inexpensive, disposable, robust, and low-power sensor nodes working cooperatively. In this paper, we propose a routing protocol for wireless sensor networks, which focuses on satisfying QoS constraints while maximizing the lifetime of the networks. Our proposed protocol enhances the network lifetime by distributing the traffic flow over multiple paths, while satisfying the different QoS requirements in a dynamic and decentralized manner. Simulation shows that the network lifetime increases without compromising QoS requirements and throughput.

Current Status of the Heavy-Ion Accelerator Facility RAON

Jongwon Kim,Wookang Kim,Hyun-man JANG,Young Kwon Kim,Ilkyoung SHIN,Bun-sik PARK,Ji-Ho Jang,Jaehong KIM,Sang-il LEE,Suk-jin CHOI,Chul-jin CHOI 한국물리학회 2016 새물리 Vol.66 No.12

The baseline design of the heavy-ion accelerator facility called RAON was completed in 2012, and its construction is scheduled to be completed in 2021. The rare isotope science project (RISP) was organized to establish the facility under the auspices of Institute for Basic Science (IBS). A complex of superconducting (SC) linacs will be used for the accelerations of high-power heavy-ion beams to utilize the technique of in-flight fragmentation for isotope beam production and for the post acceleration of the rare isotope beams produced by using the isotope separation on line (ISOL) method. The ISOL system will be driven by a 70 MeV H$^-$ cyclotron. Many efforts have been directed to developing prototypes of the SC cavities and related components, which are the core parts of the SC linac. Mass production of all the components with proper quality control is a major concern of the project. Recently, a test facility equipped with a 330 W LHe cryoplant was completed, and it has been used to test prototypes of and actual SC-linac components. Progress on RAON construction is described.