주의력결핍 과잉행동장애 아동의 지적수준에 따른 정신병리와 실행기능의 차이

천은진,서완석,이종범,김진성,구본훈,송창진,성형모,배준용,배대석 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.4

To investigate psychopathoIogy and executive functions of attention deficit hyperactivity disorder (ADHD) children according to intelligence level, this study included 197 ADHD children who visited the outpatient department of neuropsychiatry of YeungNam University Medical Center, from July 2000 to June 2002. The children were divided into groups based on their intelligence levels. They were compared by the Personality Inventory for Children (PIC), Conncers' Continuous Performence Test (CPT), and Wisconsin Card Sorting Test (WCST). There were significant differences in PIC, on the subscales of verbal development, socialization and autism. In the CPT, there was no significant difference. In the WCST, there were significant differences in the total number of errors, the number of perseverative errors, the number of completed categories and the number of trials needed to complete the first category. Considering these results, the intelligence level of ADHD children is related to their disabilities and behavioral symptoms.Executive functions such as abstract thinking, categorization, working memory and flexibility had significant relationship to the intelligence levels of ADHD children. Therefore, the intelligence level of children with ADHD influences the higher executive functions of regulating attention and information processing rather than attentional functions and capacity alone.

Study on the Brittleness Characteristics of Sand Reinforced with Polypropylene Fiber and Polyurethane Organic Polymer

Jin Liu,Ying Wang,Debi Prasanna Kanungo,Jihong Wei,Yuxia Bai,Ding Li,Zezhuo Song,Yi Lu 한국섬유공학회 2019 Fibers and polymers Vol.20 No.3

The brittleness characteristics of sand reinforced with polypropylene fiber (PF) and polyurethane organic polymer(POP) was investigated in detail using direct tensile and unconfined compression tests. The effects of POP/PF content, curing time and sand density on the brittleness of reinforced sand were studied. The reinforcement mechanism was analyzed with images of scanning electron microscope (SEM) and sample failure mode. The test results indicated that the brittleness of sand increases with curing time, and it has no obvious change after 48 h. The brittleness was decreased obviously with the increase in POP and PF contents. The brittleness of reinforced sand reaches a relative stable state when the POP and fiber contents reach 3 % and 0.6 % respectively. The brittleness also increased with sand density and it reaches a plateau at 1.55 g/cm3. The POP forms a large number of polymer films with water volatilizing in the sand, and the sand particles were wrapped. Fibers improved the compressive strength of reinforced sand and changed it to a more ductile one. Polypropylene fiber plays the role of reinforcing the sand, effectively improving the strength of the sand and reducing the brittleness of the reinforced sand.

Effect of Basalt Fiber on the Strength Properties of Polymer Reinforced Sand

Jin Liu,Yuxia Bai,Zezhuo Song,Ying Wang,Zhihao Chen,Qiongya Wang,Debi Prasanna Kanungo,Wei Qian 한국섬유공학회 2018 Fibers and polymers Vol.19 No.11

This paper displays an experimental study of the effect of basalt fiber on the strength properties of polymer reinforced sand. Laboratory trials of unconfined compression test (UCS), direct shear test, and tensile test were conducted on the specimens treated with polymer and basalt fiber, and several factors including polymer content, fiber content and dry density of sand that will influence the strength behaviors are investigated in detail. Based on test results and scanning electron microscope (SEM) images, the reinforcement mechanism was analyzed. The results showed that the polymer content, basalt fiber content and dry density of sand had greatly improved the strength behaviors of reinforced specimens. The increase in polymer and fiber content had an active effect on strength characteristics, while the angle of internal decreased slightly. The strength properties were enhanced with the increase in dry density, and the effect of dry density on tensile strength is affected by fiber content. The presence of randomly distributed fibers has formed a spatial fiber-sand net in sand, and the additive of polymer solution formed membrane to enwrap sand particles and connect sand and fibers, thereby formed a stable structure in sand. These structures have increased the bonding and interlocking forces between sand and fibers, and decreased the void ratio of reinforced specimens.

Effects of dietary enzymatic hydrolyzed three different tuna by-products as the fishmeal replacer in juvenile rainbow trout(Onchorhynchus mykiss)

Jin-hyeok Lee,Md. Abul Kalam Azad,Seonghun Won,Minji Seong,Jinho Bae,Yujin Song,Minhye Park,Haham kim,Sungchul C. Bai 한국수산해양기술학회(구 한국어업기술학회) 2017 한국수산해양기술학회 학술발표대회 Vol.2017 No.11

Recent Incidence of Paragonimus westermani Metacercariae in Freshwater Crayfish, Cambaroides similis, from Two Enzootic Sites in Jeollanam-do, Korea

Jin-Ho Song,Fuhong Dai,Xuelian Bai,Tae-Im Kim,Hyun-Jong Yang,Tong-Soo Kim,Shin-Hyung Cho,Sung-Jong Hong 대한기생충학열대의학회 2017 The Korean Journal of Parasitology Vol.55 No.3

저 전력 SoC를 위한 저 누설전류 특성을 갖는 Self-Timed Current-Mode Logic Family

송진석(Jin-Seok Song),공정택(Jeong-Taek Kong),공배선(Bai-Sun Kong) 대한전자공학회 2008 電子工學會論文誌-SD (Semiconductor and devices) Vol.45 No.8

본 논문에서는 고속 동작에서 동적 전력 소비와 정적 전력 소비를 동시에 줄일 수 있는 self-timed current-mode Logic(STCML)을 제안한다. 제안된 로직 스타일은 펄스 신호로 가상 접지를 방전하여 로직 게이트의 누설 전류(subthreshold leakage current)를 획기적으로 감소시켰다. 또한, 본 로직은 개선된 self-timing buffer를 사용하여 동적모드 동작 시 발생되는 단락 회로 전류(short-circuit current)를 최소화하였다. 80-nm CMOS 공정을 이용하여 실시한 비교 실험 결과, 제안된 로직스타일은 기존의 대표적인 current-mode logic인 DyCML에 비하여 동일한 시간 지연에서 26 배의 누설 전력 소비를 줄이고 27%의 동적 전력 소비를 줄일 수 있었다. 또한, 대표적인 디지털 로직 스타일인 DCVS와의 비교 결과, 59%의 누설 전력 소비감소 효과가 있었다. This paper introduces a high-speed low-power self-timed current-mode logic (STCML) that reduces both dynamic and leakage power dissipation. STCML significantly reduces the leakage portion of the power consumption using a pulse-mode control for shorting the virtual ground node. The proposed logic style also minimizes the dynamic portion of the power consumption due to short-circuit current by employing an enhanced self-timing buffer. Comparison results using a 80-㎚ CMOS technology show that STCML achieves 26 times reduction on leakage power consumption and 27% reduction on dynamic power consumption as compared to the conventional current-mode logic. They also indicate that up to 59% reduction on leakage power consumption compared to differential cascode voltage switch logic (DCVS).

전철시스템에서 전차선로와 통신선로간 유도전압의 해석

송진호(Jin-ho Song),이형수(Hyung-soo Lee),유근배(Keun-bai Ryu),창상훈(Sang-hoon Chang) 대한전기학회 1999 대한전기학회 학술대회 논문집 Vol.1999 No.7

내시경적 유두괄약근 절개술을 이용한 간외담관결석 제거 후 결석 재발에 영향을 미치는 인자

이진헌,강진경,박인서,문영명,정재복,정재연,송시영,김형길,정배기 대한소화기내시경학회 1999 Clinical Endoscopy Vol.19 No.4

Background/Aims: Long term results of an endoscopic sphincterotomy (EST) have still been poorly estimated. The aim of this study was to assess late complications of EST. Methods: The rate of late complications were retrospectively evaluated in with 91 patients (mean age, 59.1 years; range, 28∼86 years; M:F, 44:47), who underwent EST for choledocholithiasis. Results: Forty six patients (50.5%) had their gallbladder in situ, and 45 patients (49.5%) underwent cholecystectomy. Early complications (<30 days) such as hemorrhage, pancreatitis, and perforation occurred in 7 patients (7.7%). During a mean period of 53.4 months (range, 24∼134 months), 26 patients (28.0%) developed late complications, including a recurrence of CBD stones in 20 patients (22.0%) (8-gallbladder in situ, 12-cholecystectomized). An univariate analysis of risk factors for stone recurrence revealed dilated ducts, stone sizes, and stone numbers which were not related with stone recurrence. The history of choledocholithotomy with cholecyste was significantly related to stone recurrence. Conclusions: After EST for bile duct stones, late complications occurred in a significant proportion of patients and it was determined that a history of choledocholithotomy with cholecystectomy was significantly correlated with stone recurrence.

Calcium glycerophosphate와 Flavonoid 및 Vitamin - E 배합세치제의 치면세균막제거효과 및 구취제거효과에 관한 실용실험적 연구

김종배,서현석,진보형,송연희,신승철,이건수 대한구강보건학회 1991 大韓口腔保健學會誌 Vol.15 No.1

In order to evaluate the effect of a therapeutic toothpaste containing calcium glycerophosphate flavonoid and vitamin-E on the inhibition of dental plaque formation, the authors had examined the oral status of 96 students aged twentieth, divided into two groups, 48 in one control group were given with cosmetic toothpaste, 48 students in the other experimental group with therapeutic toothpaste containing CGP, Flavonoid, Vitamin-E. At the same time, all students were given with straight handled medium bristled toothbrush and directed to brush teeth with toothpaste and toothbrush offered. The patient hygiene performance were repeatedly examined in the 7th day, and 14th day. On the other hands, to evaluate the malodor reducing efficiency, the authors and analysed the volatile sulfur compounds from the breath after ingestion of garlic powder. 5 adults aged twentieth were examined. To obtained adequate data, expirating breath were collected into sampling loop, after ingestion of garlic powder, the subjects cleansed the oral cavity by one of the designated methods and reevaluated at 2, 7, 12 and 17 minutes after ingestion of garlic powder. Gas chromatographic technic was employed for the evaluation of volatile sulfur compounds in mouth air. The percentage change in VSC concentration of air samples were calculated in relation to values of it after ingestion of garlic powder immediately. Thereafter, the data was compared statistically and discussed. The obtained results were as follows; 1. Calcium glycerophosphate, flavonoid and vitamin-E containing toothpaste inhibited plaque formation more effectively than control cosmetic toothpaste(p<0.05). 2. Methyl mercaptan and allyl mercaptan were detected in the breath after ingestion of garlic powder. 3. Calcium glycerophosphate, flavonoid and vitamin-E containing toothpaste reduced more methyl mercaptan than control cosmetic toothpaste(p<0.05). 4. Calcium glycerophosphate, flavonoid and vitamin-E containing toothpaste reduced more allyl mercaptan than control cosmetic toothpaste(p<0.05) 5. Therapeutic toothpaste containing calcium glycerophosphate, flavonoid and vitamin-E increased the effects of plaque formation inhibition & malodor elimination.

한국판 ADHD 평가척도 개발을 위한 문항선별과 분석

송창진 ( Chang Jin Song ),구본훈 ( Bon Hoon Koo ),배대석 ( Dai Seg Bai ) 한국정서.행동장애아교육학회(구.한국정서학습장애아교육학회) 2006 정서ㆍ행동장애연구 Vol.22 No.1

본 연구는 문화적 차이와 시대적 변화를 반영한 신뢰도와 타당도가 높은 ADHD 행동증상 평가척도를 개발하기 위하여 기존에 표준화되어 사용되어지고 있는 ADHD 행동증상 평가척도 중 대표적인 ADDES-HV, ACTeRS, CAP, SNAP의 4개 척도를 ADHD 환자 826명(남자 666명, 여자 160명)을 대상으로 실시하였다. 기여도가 높은 문항을 선별하여 초등학교 재학 중인 7세에서 12세 사이의 ADHD 환자 238명(남자 203명, 여자 35명)과 120명의 정상대조군을 대상으로 판별분석을 실시하였다. 그 결과, 총 105개 문항 중 48개 문항(45.7%)을 선별하였다. 선별된 48개 문항에 대해 요인분석을 실시하여 최종적으로 5개 요인을 추출하였으며, 선별된 48개 문항 중 중복된 문항을 제외한 39개 문항을 최종적으로 선별하였다. 이 요인들의 신뢰도 평가를 위하여 내적일관성을 나타내는 Cronbach`s alpha를 구하였다. Cronbach α 값은 안절부절 요인 0.857(p<.05), 과잉행동 요인 0.852(p<.05), 지속적인 주의집중의 어려움 0.915(p<.05), 충동성 0.887(p<.05), 부주의로 인한 과제수행의 어려움 0.897(p<.05)로 만족할만한 수준이었다. 선별된 문항으로 초등학교 재학 중인 ADHD 환자군과 정상대조군을 판별할 수 있는 판별력을 측정한 결과 초등학교 재학 중인 ADHD 환자군 238명 중 236명(99.15%)을 환자로 판별하였고(p<.05), 정상 대조군에서는 120명 중 118명(98.3%)을 정상으로 판별하여(p<.05) 전체 판별력이 98.9%인 것으로 나타났다. Purpose of this study is to develop more reliable ADHD behavioral symptom rating scales in Korea based on Diagnostic and Statistical Manual of Mental Disorder, 4th edition(DSM-IV) criteria. ADHD group (N=826) and normal group (N=120) were evaluated by four ADHD scales (Attention Deficit Disorders Evaluation Scale - Home version [ADDES-HV], ADDH Comprehensive Teacher Rating Scale [ACTeRS], Children Attention Profile [CAP], Swanson, Nolan, and Pelham Checklist[SNAP]) and investigated several statistic analysis like item correlation analysis, factor analysis, discriminant analysis and measure the reliability, validity. As a result, the 39 items are extracted. and 5 factors were analyzed. The factors were restlessness, hyperactivity, difficulty of sustained attention, impulsivity, difficulty to remain on the task to do homework. Cronbach`s alpha of these factors were 0.857, 0.852, 0.915, 0.887, 0.897, respectively. Discriminant ability of these factors for elementary school aged ADHD patients is 99.15%. To conclude, this new developed items of ADHD behavioral symptom rating scale is useful screening tool for ADHD children in Korea.