Characterization of cricket song patterns and the behavior observation of Teleogryllus emma (Orthoptera:Grylloidea)

Ji Chang Woo,Kim Nam-Jung,Lee Sang-Guei,Hwang-Yong Kim,Choi Hoon-Sik,Song In-Sun,Ko Jee Sun 한국응용곤충학회 2010 한국응용곤충학회 학술대회논문집 Vol.2010 No.05

We analyzed the chirp sound and behavior of Teleogryllus emma with observation system, which was consisted of computer, ccd-camera and microphone. Computational methods of wavelet transformation and Self-Organizing Maps (SOM) were utilized to characterized the chirp sound of insect species for automatic counting in this study. Wavelets were initially applied to feature extraction of the chirp sound. Wavelet coefficients were accordingly calculated based on the basis function (e.g., Morlet). The obtained coefficients were subsequently provided to count number of chirps in each song. Sound structure of insect specimens consisted with long chirp and short chirp and the patterns of song were grouped by frequency of long chirp and short chirp. The song patterns of insect specimens were divided by Self-Organizing Map (SOM) that was used number of chirp as input data. Application of computational methods to automatic detection of chirp sound was further discussed for obtaining objective assessment in behavior science.

2003년 국내 중증급성호흡기증후군 진료 현황 및 문제점 분석

이진수,김은실,정문현,백제중,정선화,안주희,최영화,이선희,고철우,김성범,김민자,박승철,기현균,송재훈,최상호,김양수,이상오,조용균,박영훈,정숙인,김연숙,이흥범,손창희,장성희,정희진,김우주 대한감염학회 2004 감염과 화학요법 Vol.36 No.3

목적 : 2002년 말 중국에서 SARS가 발생한 이후 국내에서도 2003년 10월까지 총 3명의 추정환자, 17명의 의심환자가 보고되었다. 향후 추가적인 SARS의 유행이 우려되는 상황에서, 그간의 SARS 환자 진료에 있어서의 실질적인 준비사항, 진료 현황 등에 대한 조사를 통해 문제점을 파악하여, 향후 더 나은 대비가 될 수 있도록 개선점을 제시하고자 하였다. 재료 및 방법 : SARS로 의심되는 환자를 진료 경험이 있는 병원의료진을 대상으로 2003년 10월에 설문조사를 실시하였다. 설문에는 SARS 환자 진료 시의 실질적인 조치, 진료 현황, 병실, 응급실 및 외래에서의 격리 시설과 준비사항, 보건당국의 관리와 지원에 관한 사항을 포함하였다. 결과 : 대상이 되는 22개 병원 중 17개(17/22, 77.2%) 병원이 설문에 응하였다. SARS 환자를 위한 격리실은 응급실, 외래, 일반병실 및 중환자실에서 각각 9개(9/17, 52.9%), 5개(5/17, 29.4%), 15개(15/16, 93.7%), 4개(4/16, 25%) 병원에서 음압처리가 되어있지 않은 일인실 혹은 다인실이 사용되었고, 1개(1/16, 6.3%) 병원에서만 일반병실에서 음압격리실이 운영되었다. 입원환자의 진찰 시 개인보호구의 착용은 거의 모든 의료기관에서 이루어졌다. 보건당국에서 SARS지정병원의 시설 등을 사전에 확인한 곳은 1곳(1/12, 8.3%)이였고, 14개 병원(14/15, 93.3%)에서는 보건당국에 의뢰한 검사결과를 통하 받지 못하였다. 결론 : 의료기관에서 SARS 환자용 격리실뿐만 아니라 기존의 격리실 설비 등이 미흡하였으며, 특히 중환자실 및 외래의 준비가 더욱 부족하였다. 보건당국의 의료기관에 대한 종합적인 지원이 부족하였고, 병원과의 원활한 연계가 잘 이루어지지 않았다. SARS 만이 아닌 격리를 필요로 하는 질환의 적절한 진료를 위해 향후 병원 시설의 정비와 정부차원에서의 보다 구체적이고 실질적인 대책마련이 필요하다. Background : There was an worldwide outbreak of the Severe Acute Respiratory Syndrome (SARS) originated from China in late 2002. During that period three cases of suspected SARS and 17 cases of probable SARS were reported in Korea. With the concerns about the reemergence of SARS-coV transmission, it is important to be prepared for any possibility. So, this study is aimed to analysis the past measures in managing SARS and propose the amendatory plans to improve the preparedness. Materials & Methods : Questionnaires were collected among clinicians with any experience in managing the probable or suspected SARS cases in Oct. 2003. 17 out of 22 hospitals responded to the questionnaire. The contents in the questionnaire were practical activities, personal equipments, response plans, isolation facilities in emergency centers, outpatient clinics, general wards and intensive care units, and relationship with the public health department. Results : The dedicated isolation rooms in emergency centers, outpatient clinics, general wards, and intensive care units were prepared in 9 (9/17, 52.9%), 5 (5/17, 29.4%), 15 (15/16, 93.7%), and 4 (4/16, 25.0%) hospitals, respectively. Except for one hospital that newly made negative pressure room for SARS, single or multi-bed rooms without airborne infection control were used in all the other hospitals. The personal precaution principles were kept quite well in general wards. Before the designation of SARS hospital by the public health department prior evalution to see if the hospital was suitable for managing SARS was conducted in only 1 (1/12, 8.3%) hospital. The results of laboratory diagnosis were reported back in 1 (1/15, 6.6%) hospital. Conclusions : The isolation facilities which can control airborne infection were almost deficient not only for SARS but also for other respiratory transmissible diseases. For the infection control of transmissible diseases including SARS, more investment is needed on medical facilities and comprehensive support from the public health department required.

서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)

김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2

Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.

건설 프로젝트에서 D-virus가 안전에 미치는 영향에 관한 기초적 연구

송진우,표영민,진유나,이상범,김정길 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

Construction site has contributed to construction productivity improvement by utilizing information, simplification, and standardization concept. Also it has contributed to quality and productivity improvement by standardizing design and construction process, using them to a fair decision-making process by organizing diverse data in construction process. However, construction process has diverse variables and uncertain case due to particularity in construction. These parts have an effect on construction process. To use unorganic construction information and knowledge properly has become the factor to project success. Therefore, this study analyzes that D-virus of the uneasy factors has an effect on safety control of construction industry. That is to say, aim of the study is to suggest the solution to remove those after confirming for these factors to have certain effect in construction process through fact finding survey and retesting the factors of D-virus to refer in business management in a constructive position.

Mossbauer 分光法과 選擇的 抽出方法에 의한 濟州島 土壤에서의 酸化鐵의 特性 究明

宋寬哲,姜東佑,金斗哲,高正大,洪性樂 濟州大學校 基礎科學硏究所 1997 基礎科學硏究 Vol.10 No.1

濟州島의 8개 代表土壤을 對象으로 하여 X-線 螢光分析, X-線 回折 分析, oxalate와 dithionite-citrate를 사용한 選擇的 抽出方法 및 Mossbauer 分光法으로 一次鑛物, ferrihydrite, 結晶質 酸化鐵의 種類, 含量 및 非磁性 Al이온의 置煥程度에 대하여 考察하였다. 1. X-線 螢光 分析에 의한 濟州島 8개 土壤統의 酸化鐵(Fe₂O₃) 含量은 噴石口 토양인 松岳統에서 18.21%로 가장 높았고 논토양인 大靜統에서 8.03%로 가장 낮았다. 2. X-線 回折 分析 結果 8개 土壤統 모두에서 ferrihydrite와 結晶質 goethite의 回折 피크는 나타나지 않았지만, 結晶質 hematite는 松岳統, 舊巖統 및 黑岳統에서 檢出할 수 있었다. 3. 선택적 침출방법으로 측정한 ferrihydrite 含量은 흑색토인 松堂과 吐坪統, 농암갈색의 분석구 토양인 柑山統 및 갈색삼림토인 黑岳統에서 20.9-35.2g/㎏으로 높았고, 논토양인 大靜統에서 0.85g/㎏으로 가장 낮았다. 結晶質 酸化鐵 含量인 Fed-Feo 含量 松岳統에서 28.7g/㎏으로 가장 높았고 黑岳統에서 7.6g/㎏으로 가장 낮았다. 4. 濟州島 8개 土壤統에 함유되어 있는 常磁性 Fe³+ 鑛物들은 化學造成이 거의 같은 ferrihydrite, 超常磁性 goethite, 층형 硅酸鑒粘土鑛物로서 柑山統에서 그 含量이 가장 높았고 松岳統에서 가장 낮은 것으로 분석되었다. 常磁性 Fe²+ 一次鑛物은 柑山統과 黑岳統에서 olivine, illite의 含量이 優勢하였으나 그 외 土壤에서는 小量의 chlorite, augite, biotite, hornblende 등이 含有되어 있는 것으로 분석되었다. 5. 18K에서 측정된 超微細磁氣場값으로 부터 大靜統에서는 미세한 goethite 만이 含有되어 있는 것으로 確認되었고, 그외 7개 土壤에서는 입자 크기가 작은(∼180Å) 結晶質 hematite와 goethite이 것으로 分析되었다. 6. 濟州島 8개 土壤統에 함유되어 있는 酸化鐵의 구조에서 Fe³+와 非磁性 Al³+이 相堂量 部分 置煥되었음을 確認할 수 있었다. Iron oxide compounds in 8 selected Cheju Island soil samples have been analized by X-ray fluorescence spectrometer(XRF), X-ray diffractometry(XRD), selected chemical techniques, and Mossbauer spectroscopy. The result of this analysis by XRF shows that the rate of quantity of Fe₂O₃ in 8 soil samples was from 8.03wt.%(Daejeong paddy soil ) to 18.21wt.%(Songag soils). Songag, Heugag and Gueom soils were detected to have lower peaks of intensity of hematite by XRD. In addition, these soils were not detected to have hematite and goethite peaks. Ferrihydrite, which is a short-range-order mineral commonly present in volcanic ash soil, was not detected by XRD due to low concentration and/or poor cristallinity. Ferrihydrite contents estimated from Feo values were 8.8∼35.2g/㎏ for volcanic ash soils and 0.85g/㎏ for the Daejeong soil. Most of the soil samples represented by the paramagnetic Fe³+ doublet obtained from Mossbauer spectra at room temperature and 18K were considered to arise from the presence of ferrihydrite, superparamagnetic goethite, and silicate minerals. Also the paramagnetic Fe²+ doublets are attributable to primary minerals such as olivine, illite, chlorite, augite, biotite, and hornblende. Goethite and hematite were identified as the dominant crystalline iron oxides in these soils from Mossbauer spectra obtained at room temperature and 18K. All the soil samples exhibited strong superparamagnetic relaxation. Collapse of the Mossbauer magnetic hyperfine splitting at room temperature was due to the small size(∼180Å) of the oxide particles and/or Al-subsituted goethite.

Dextranase 함유 구강 세정액의 치태 제거 및 치은염 예방 효과에 관한 임상적 연구

송우성,손성희,정현주 전남대학교 치의학연구소 2001 구강과학 Vol.13 No.3

A novel glucanhydrolase (DXAMase) from a mutant of Lipomyces starkeyi (KSM 22) has been shown effective in hydrolysis of mutan, reduction of mutan formation by Streptococcus mutans and removal pre-formed sucrose-dependent adherent microbial film and DXAMase has been strongly bound to hydroxyapatitie. These in vitro properties of Lipomyces starkeyi DXAMase are desirable for its application as a dental plaque control agent. This study was performed to determine the adjunctive oral hygiene benefits and safety of dextranase (Lipomyces starkeyi KSM 22 DXAMase)-containing mouthwash when used alongside normal toothbrushing. This 6-month clinical trial was placebo-controlled double-blind design evaluating 1U/㎖ dextranase mouthwash and 0.12% chlorhexidine mouthwash. A total 39 systemically healthy subjects, who had moderate levels of plaque and gingivitis were included. At baseline, 1, 3 and 6 months, subjects were scored for plaque accumulation(Turesky modification of Quigley-Hein's plaque index), gingivitis status (Lo¨e and Silness gingival index), and tooth stain(Area and severity index system by Lang et al). Additionally, oral mucosal examinations were performed and subjects questioned for adverse symptoms. Two weeks after pre-experiment examinations and a professional prophylaxis, the subjects were provided with allocated mousewash and instructed to use 20-ml volumes for 30s twice daily after toothbrushing. All the groups showed significant increase in plaque accumulation since 1 month of experiment. During 6 month's period, the Dextranase mouthwash group showed the least increase in plaque accumulation, compared to the Chlorhexidine mouthwash and placebo groups. As for gingival inflammation, all the groups showed significant increase during 6 months of experiment. The Experimental group (Dextranase mouthwash) also showed the least increase in gingival index score, compared to the Positive control (Chlorhexidine mouthwash) as well as the Negative control (placebo) groups. Whereas the tooth stain was increased significantly in the Positive control group, compared to the baseline score and the Negative control group since 3 months of mouthrinsing. It was significantly increased after 6 months in the Experimental group, still less severe than the Positive control group. As for the oral side effect, the Experimental group showed less tongue accumulation, bad taste, compared to the Positive control group. From these results, mouthrinsing with Lipomyces starkeyi KSM 22 dextranase provided adjunctive benefits to toothbrushing, comparable to 0.12% chlorhexidine mouthwash in inhibition of plaque accumulation and gingival inflammation and local side effects were if anything less frequent and less intense than chlorhexidine, with long-term use of the mouthwash. All data had provided positive evidence for Lipomyces starkeyi KSM 22 dextranase as an antiplaque agent and suggested that further development of dextranase formulations for plaque control are warranted.

off-line 저류지 횡월류위어의 유량계수 및 적정폭 제안

宋在偶,朴晟植,金智鎬 弘益大學校 科學技術硏究所 2005 科學技術硏究論文集 Vol.16 No.-

The side weir is a structure that is installed to maintain uniform overflow discharge and reduce or distribute the peak flow in downstream at flood. The facility has been widely used in reducing the peak flow of flood when increasing the runoff in proportion to the development of watershed. To estimate more accurately the outflow over a sharp crested side weir, it is necessary to analyze the flow characteristics over side weir and to estimate the discharge coefficient in the weir equation. The purpose of this study is to suggest the suitable length of side weir and to propose equations for the discharge coefficients of side weir in off-line detention basin by means of hydraulic model experiments with the variations of upstream Froude number in the main channel and length of side weir. Experimental results show that the discharge coefficients depend on the upstream Froude number in the main channel and the ideal ratio of side weir length to main channel width was found to be more than 6.

지속성 외래 복막투석 환자에서 염증 지표와 고해상도 B 모드 경동맥 초음파 소견의 연관성에 관한 연구

송현용,송영수,안철우,강신욱,최규헌,하성규,이현철,이호영,한대석 대한신장학회 2002 Kidney Research and Clinical Practice Vol.21 No.2

배 경 : 저알부민혈증 및 C-반응 단백(C-reactive protein, CRP)이 증가된 지속성 외래 복막투석 환자의 사망률이 높은 정확한 이유는 밝혀져 않다. 혈액투석 환자에서처럼 복막투석 환자에서 저알부민혈증 및 염증반응이 심혈관계 질환 위험인자 인지 알아보고자 하였다. 방 법: 비당뇨병성 말기 신부전, 지속성 외래 복막투석 환자 93명의 심혈관계 질환 위험인자들과 복막 투과 특성 및 알부민, CRP 등의 염증지표에 따라 고해상도 초음파를 이용한 경동맥내막-중간막 두께, 내막-중간막 면적, 플라크의 유무 등을 단면적으로 비교하였다. 결 과: 복막 투과 특성은 고투과막군 14명, 중간 고투과막군 38명, 중간 저투과막군 31명, 저투과막군 10명으로 각 군간의 경동맥 내막-중간막 두께, 플라크 유무 및 내막-중간막 면적의 차이는 없었다. 기존 관상동맥 질환 환자는 8예(8.6%)로 내막-중간막 두께는 관상동맥 질환이 없는 환자보다 증가되었고(0.79±0.21 vs 0.60±0.11 mm, p<0.05) 플라크 형성은 더 많이 보이나 통계적 유의성은 없었다(75.0 vs 63.5%, p>0.05). 혈청 알부민치와 경동맥 내막-중간막 면적은 역상관관계를 보였다(r=-0.27, p<0.05). 저알부민혈증 환자(혈청 알부민 <3.5 g/dL)는 정상 알부민혈증 환자보다 내막-중간막 두께가 증가되었고(0.67±0.15 vs 0.61±0.12 mm, p<0.05), 플라크도 유의하게 많았다(68.0 vs 55.8%, p<0.05). 혈청 CRP치와 경동맥 내막-중간막 면적은 양의 상관관계가 있었으며(r=0.21, p<0.05) CRP가 높은 환자(≥0.8 mg/dL, n=18)에서플라크가 많이 관찰되었으나(65.8 vs 50.0%, p<0.05) 경동맥 내막-중간막 두께 및 내막-중간막면적은 양군간에 차이가 없었다. 다변량 회귀 분석상 경동맥 내막-중간막 두께에 영향을 미치는 인자는 고령, 높은 CRP, 기존 심혈관계질환, 낮은 혈청 알부민 순이였다. 결 론 : 복막투석 환자에서 고해상도 초음파를 이용한 경동맥 내막-중간막 두께 측정은 심혈관계 질환 유무 예측의 비침습적 검사가 될 수 있고 저알부민혈증 및 높은 CRP과 같은 만성염증 지속상태가 복막투석 환자에서 죽상 동맥 경화증의 발생을 증가시킨다고 가정할 수 있다. Background : Continuous ambulatory peritoneal dialysis(CAPD) patients with low albumin(LA) and signs of inflammation reflected by increased C-reactive protein(CRP) level have an increased mortality, but the mechanism of this phenomenon is not clear yet. Methods : To answer whether LA and inflammation also enhance cardiovascular risk in CAPD patients, we performed cross sectional study measuring carotid artery intima-media thickness(IMT), calculated intima-media area(cIM area) and the presence of plaque by high-resolution B-mode ultrasonography in 93 non-diabetic CAPD patients. Results : Patients with coronary artery disease (CAD, n=8) had significantly increased IMT(0.79± 0.21 mm vs. 0.60±0.11 mm, p<0.05) and higher prevalence of carotid plaques(75.0% vs. 63.5%) compared to the non-CAD patients. Significant inverse correlation was observed between serum albumin (SA) level and cIM area(r=-0.27, p<0.05). Those patients with LA(SA <3.5 g/dL) had significantly increased IMT compared to non-LA patients(0.67±0.15 mm vs 0.61±0.12 mm, p<0.05). Prevalence of carotid plaques was also significantly higher in LA patients (68.0% vs. 55.8%, p<0.05). CRP level revealed a significant positive correlation with cIM area(r=0.21, p< 0.05). Patients with high CRP(≥0.8 mg/dL, n=18) had higher prevalence of carotid plaques (65.8% vs. 50.0%, p<0.05) compared to those patients with CRP <0.8 mg/dL, but IMT and cIMT area were not different. By multivariate logistic regression analysis, old age, high CRP, history of CAD and low SA were the independent risk factors affecting IMT. Conclusion : Our study strongly suggests that low albumin and chronic inflammatory state of CAPD patients could be associated with increasing atherosclerotic cardiovascular disease. (Korean J Nephrol 2002;21(2):285-294)

Coir Roll을 이용한 자연형 호안의 수리학적 특성

宋在偶,李尙度 弘益大學校 科學技術硏究所 2001 科學技術硏究論文集 Vol.12 No.-

Laboratory flume experiments to investigate the hydraulic characteristics by using close-natured element "coir roll" are carried out. This study examines the comparision if mean velocity and roughness coefficient in the case of spread the coir roll and plant the vegetation on the coir roll. The experiments was conducted using a 0.9m-wide, 0.45-deep flume with 8m-length and a radius if 2.5m in 180℃ An approximately 5cm thickness coir roll spread the flume bottom, 10cm in length and a 0.5cm in diameter vegetation planted at intervals of 9cm on the coir roll. The water was recirculated throughout the flume and return curcuit by a centrifugal pump. The results show that spread the coir roll and plant the vegetation on the coir roll are smaller each 43 percent and 46 percent than not spread the coir roll in the case of mean velocity. In the case of roughness coefficient, spread the coir roll and plant the vegetation on the coir roll are larger each 2.54 times and 2.37 times than not spread the coir roll.

효소가수분해에 의한 볏짚으로 부터 글루코오스 생성 : 저농도 기질의 가수분해를 중심으로 In the range of low substrate concentration

송동윤,김우식,유인상 연세대학교 산업기술연구소 1987 논문집 Vol.19 No.1

The Enzymatic hydrolysis of pretreated rice straw cellulose was investigated to produce glucose by cellulase and β-glucosidase. The reaction mechanism was studied in a batch reactor at low concentrations (1-5 w/v%) of rice straw and continuous hydrolysis was performed in a C.S.T.R. By using 19.2 unit/mℓ cellulase, pretreated rice straw (4%) was converted to gluclse up to 20 mg/mℓ after 1hr reation time at 50℃ and pH 4.4. The Yield was 94%. When the rice straw was hydrolyzed by cellulase and β-glucosidase, reaction kinetics were showen as Michaelis-Menten equation with V?????? = 0.0688/L.min and Km = 3.4g/L. In the continuous hydrolysis, the yield was 49% at dilation rate 0.24h?? when the rice straw concentration was 5%.