와트 Ni 도금욕에서 도금 피막에 미치는 Al, Al₂O₃ 분산제 및 열처리의 영향

이상백,박형호,배인성,윤재식,김병일,Lee, Sang-Baek,Park, Hyeong-Ho,Bae, In-Seong,Yun, Jae-Sik,Kim, Byeong-Il 한국재료학회 2002 한국재료학회지 Vol.12 No.2

The co-deposited behavior was investigated under varied bath compositions and current densities from Watt Ni plating bath containing Al and A1$_2$O$_3$powders. For single-particle bath, Al and A1$_2$O$_3$particles were agglomerated. The area percentage of A1$_2$O$_3$on plating surface decreased with increasing the current density, while that of Al on plating surface increased. On the other hand, in case of double-particle bath with 1.25g/$\ell$ of Al and 5.0g/$\ell$ of A1$_2$O$_3$5g, the area percentage of Ni-Al-A1$_2$O$_3$increased with increasing current density and the surface morphology was fine without agglomeration. Intermetallic compounds such as $\gamma$'and $\gamma$+$\gamma$' phases appeared when the co-deposited film was annealed.

폴리아닐린과 첨가제에 따른 아연전기도금층의 표면 외관 특성

이상백,박형호,배인성,윤재식,김병일,Lee, Sang-Baek,Park, Hyeong-Ho,Bae, In-Seong,Yun, Jae-Sik,Kim, Byeong-Il 한국재료학회 2002 한국재료학회지 Vol.12 No.2

Effect of polyaniline and additives on surface appearance of Zn electrodeposition was investigated by SEM and XRD analyzing. We carried out the experiment from sulfate Zinc bath containing sulfonated polyaniline, gelatin and thiourea by EG(Electrogalvanizing) simulator. Addition of polyaniline and gelatin in bath, crystal size and shape of hexagonal plane of Zn crystal reduced. Mixing of thiourea, however, brittle deposits were observed because of the difference between vertical growth and parallel growth. (1011) peak appeared with polyaniline and gelatin in XRD analysis. In case of mixing of polyaniline, gelatin and thiourea, (1011) peak appeared and intensity of Zn basal plane decreased. These results suggested that overpotential increased with addition of polyaniline and additives In bath.

구리 전착층에 미치는 콜로이달실리카 및 음극 Pre-Coating의 영향

이상백,윤정모,박형호,배인성,김병일,Lee, Sang-Baek,Yun, Jeong-Mo,Park, Hyeong-Ho,Bae, In-Seong,Kim, Byeong-Il 한국재료학회 2001 한국재료학회지 Vol.11 No.7

The crystal structure, surface morphology and preferred orientation of the copper electrodeposit were investigated by the using sulfate bath with $SiO_2$suspensions and the cathode substrate Au sputtered. As by the addition of colloidal silica in copper electrolytic bath and Au pre-coating on substrate, the crystal particles of deposits was fined-down, made uniform and the account of particles were increased. Hardness of copper electrodeposits with colloidal silica increased about 15% in comparison with that of pure copper deposit film and (111), (200) and (311) plane of X-ray diffraction patterns were almost swept away, so preferred orientation of the copper deposits changed from (111) to (110) plane by codeposit $SiO_2$ and precoating the substrate. 황산구리 전해욕에 분산제인 콜로이달 실리카($SiO_2$현탁액)를 첨가시키는 분산도금의 방법과 Au pre-coating을 이용하여 음극에 석출하는 전해 석출물의 결정구조, 표면형상, 결정방향 등의 변화를 검토하였다. 실리카 분산 및 Au pre-coating에 의하여 전해 석출피막의 결정입자가 미세화 되고, 균일하게 성장됨은 물론, 결정 수가 증가하였다. 콜로이달 실리카의 분산 효과에 의해서 전해 석출피막의 경도가 대략 15%까지 상승하였다. 또한 콜로이달 실리카를 분산시킨 구리 전착층의 X-선 회절패턴이 (111)면, (200)면과 (311)면이 거의 소멸되어 우선 방위가 (111)에서 (110)면으로 변화되었다.

황산구리 전해욕의 전착피막에 미치는 콜로이달실리카의 영향

이상백,김병일,윤정모,박정현,Lee, Sang-Baek,Kim, Byeong-Il,Yun, Jeong-Mo,Park, Jeong-Hyeon 한국재료학회 2001 한국재료학회지 Vol.11 No.5

황산구리 전해욕에 분산제인 콜리이달 실리카($SiO_2$현탁액)를 첨가시키는 분산도금의 방법을 이용하여 음극에 석출하는 전해 석출물의 결정구조, 표면형상, 결정방향 등의 변화를 검토하였고 내식성, 물리적 특성 또한 조사하였다. 콜로이달 실리카를 분산시킨 구리 전해욕의 석출피막의 특성에 대해서 조사한 결과, 다음과 같은 결론을 얻었다. 전해 석출피막의 결정입자가 미세화 되고, 균일하게 성장됨은 물론, 결정 수가 증가하였으며, 콜로이달 실리카의 분산 효과에 의해서 전해 석출피막의 경도가 대략 16%까지 상승하였다. 또한 콜로이달 실리카를 분산시킨 극리 전착층의 X-선 회절패턴이 (111)면, (200)면과 (311)면이 거의 소멸되어 우선 방위가 (111)에서 (110)면으로 변화되었다. 부식전위의 측면에서도 콜로이달 실리카의 흡착 효과에 의해서 구리 전착층의 전위가 귀하게 이동하는 효과를 얻을 수 있었다. We investigated change of crystal structure, surface morphology and crystal orientation of the electrodeposited film from dispersed $SiO_2$ suspensions (colloidal silica) copper sulfate bath and arse corrosion potentials and physical specific properties. As addition of colloidal silica in copper electrolytic hath, the crystal Particles on filial was fined-down, made uniform and account of particles were increased. Hardness of copper electrodeposited film ascended about 15% and (111), (200) and (311) plane of X-ray diffraction patterns were almost swept away, so preferred orientation chanced from (111) to (110) plane. Also, corrosion potential of electrodeposited copper film was noble with colloidal silica addition.

여성 알코올 의존 입원환자의 음주 양상 및 기질 성격 특성

이상백(Sang-Baek Lee),이정식(Jung-Sik Lee),송진우(Jin-Woo Song),강상범(Sang-Bum Kang),김응조(Eung-Jo Kim),홍계현(Kye-Hyun Hong),조성민(Sung-Min Cho),이석진(Suk-Jin Lee),장순우(Soon-Woo Chang) 한국중독정신의학회 2009 중독정신의학 Vol.13 No.1

Objective:This study examined the temperament and character inventory (TCI) scores as well as demographic and clinical data of female alcoholic patients, in order to discern new treatment possibilities for them. Methods:Forty-three female patients with alcohol dependence and thirty-two female social drinkers were included in this study. Female patients were divided into subgroups with positive and negative family histories. The presence or absence of drinking problems in the hus-band was also recorded. The demographic data and the TCI scores of groups were obtained. The clinical characteristics of each group were identified by obtaining information about drinking habits and childhood victimization histories, and by administer-ing the Beck Depression Inventory (K-BDI), State-trait Anxiety Inventory (STAI), Buss-Durkee Hostility Inventory (BDHI), Acute Physiological and Psychological Response after Drinking, and the Michigan Alcohol Screening Test (MAST-K). Results:Higher scores of Self-Transcendence (ST) and lower scores of Self-Directedness (SD) were shown in female patients compared to normal controls. Female alcoholics had higher scores on the BDI and STAI, and tended to have more suicidal thoughts and attempts. They also showed higher rates of childhood victimization experiences such as physical abuse. Conclusion:TCI profiles of the female alcoholic patients compared with normal healthy subjects reflected common comorbid psychiatric conditions such as depression, anxiety disorder, and personality dis-order. The evaluation of childhood traumatic experience and suicidal risk should be included in the treatment process for fe-male alcoholics.

입원한 남성과 여성 알코올 의존 환자간의 임상적 특징 및 기질 성격 특성의 차이

이상백(Sang Baek Lee),이정식(Jung Sik Lee),송진우(Jin Woo Song),강상범(Sang Bum Kang),김응조(Eung Jo Kim),홍계현(Kye Hyun Hong),조성민(Sung Min Cho),이석진(Suk-Jin Lee),장순우(Soon Woo Chang) 한국중독정신의학회 2010 중독정신의학 Vol.14 No.1

Objective:Although researchers have performed many stu-dies attempting to understand alcoholics’ characteristics, few have conducted direct comparative studies between male and female alcoholics. This study examined the differences in Temperament and Character Inventory (TCI) scores and in clinical characteristics between male and female alcoholics, to discern new treatment possibilities for both groups. Method:Study participants were 55 male and 49 female patients with alcohol dependence. We obtained their demographic data and TCI scores. Additionally, we identified each group’s clinical characteristics from information on their drinking habits and suicidality histories and from the results of administering the Buss-Durkee Hostility Inventory (BDHI), the Acute Physiological and Psychological Response after Drinking, and the Michigan Alcohol Screening Test (MAST-K) to them. Results:Female patients had higher scores on Harm-Avoidance (HA) and lower scores on Reward-Dependence (RD) and Cooperative (CO) as compared to male patients. Male alcoholics had earlier ages of drinking onset and higher scores on Anger Control. Female alcoholics tended to have more suicidal thoughts and attempts. In the presence of a positive familial history, female alcoholics had higher scores on Spontaneous Aggression and lower scores on Novelty-Seeking (NS) and Reward-Dependence (RD) than did male alcoholics. Conclusion:These results suggest that male alcoholics tend to have more biological traits than female patients have and that female patients have more Editor’s note re highlight: Please clarify. Some information seems to be missing here. psychological problems than male patients have. These differences between male and female alcoholics should be incorporated into treatment processes for patients with alcohol dependence.

전문용어 정제를 위한 형태소 분석을 이용한 한의학 증상 진단 시스템 개발

이상백(Sang-Baek Lee),손윤희(Yun-Hee Son),장현철(Hyun-Chul Jang),이규철(Kyu-Chul Lee) 한국정보과학회 2016 정보과학회 컴퓨팅의 실제 논문지 Vol.22 No.2

증상 진단 시스템이라 함은 환자가 자신의 증상을 설명하고, 한의사가 증상에 맞는 질병 진단을 내리는 것을 말한다. 증상 진단 시스템을 자동화하기 위해서는 환자의 자연어로 이루어진 증상 설명에 대한 분석이 필요하다. 이에 본 논문에서는 증상 설명에 대하여 형태소 분석을 수행하고 한의학 병증 데이터와 비교하여 적합한 진단을 내리도록 증상 진단 시스템을 개발하였다. 증상 진단 검색의 효율을 높이기 위해서 Document형 NoSQL인 MongoDB를 이용하여 각각의 병증 데이터를 하나의 도큐먼트로 하고, 그 안의 필드값을 유연하게 관리할 수 있도록 데이터베이스를 구축하였다. 또한, 진단의 근거가 되는 한의사의 병증 설명과 환자의 증상 설명에서 사용되는 용어의 차이를 줄일 수 있도록 환자의 증상 설명을 축적하고 정제하여 일반인에게 친숙한 단어로 구성된 설명데이터를 제공할 수 있게 하였다. This paper presents the development of the Korean medicine symptom diagnosis system. In the Korean medicine symptom diagnosis system, the patient explains their symptoms and an oriental doctor makes a diagnosis based on the symptoms. Natural language processing is required to make a diagnosis automatically through the patients’ reports of symptoms. We use morphological analysis to get understandable information from the natural language itself. We developed a diagnosis system that consists of NoSQL document-oriented databases-MongoDB. NoSQL has better performance at unstructured and semi-structured data, rather than using Relational Databases. We collect patient symptom reports in MongoDB to refine difficult medical terminology and provide understandable terminology to patients.

유전체장벽방전 플라즈마 중합을 이용한 양어 사료의 소수성 코팅

이상백 ( Sang Baek Lee ),트린쾅흥 ( Trinhquang Hung ),조진오 ( Jin Oh Jo ),정준범 ( Jun Bum Jung ),임태헌 ( Tae Heon Im ),목영선 ( Young Sun Mok ) 한국공업화학회 2014 공업화학 Vol.25 No.2

양어 사료의 부상시간을 연장시켜, 사료 소비율을 높이고 양식장 수질오염을 저하시키기 위해 사료에 소수성 코팅을 하였다. 상압 유전체장벽방전 플라즈마 반응기 시스템에서 헥사메틸다이실록세인(HMDSO), 톨루엔 및 n-헥세인을 전구물질로 사용하여 사료 입자의 표면에 코팅 층을 형성시켰다. 공정 변수인 플라즈마 구동을 위한 입력 전력, 전구물질 종류, 코팅시간을 변화시키며 코팅 성능을 비교하였다. 코팅된 사료 표면의 물리, 화학적 성질은 접촉각 측정기와 퓨리에 변환 적외선 분광광도계를 이용하여 조사하였다. 소수성 플라즈마 코팅 후 물의 접촉각 증가는 표면이 소수성으로 변화하였음을 나타냈으며, 코팅된 시료의 적외선 분광 스펙트럼을 통해 소수성 피막이 CH3, Si-O-Si, Si-C로 구성되어 있음을 알 수 있었다. 코팅된 사료의 부상시간이 미코팅 사료에 비해 수초에서 3 min까지 증가하였으며, 플라즈마 코팅 방법이 사료의 부상성능을 향상시키는 방법으로 사용될 수 있음을 보여 주었다. 코팅 직후 시료에 비해 6일 경과 후 시료의 물 접촉각이 크게 증가하였는데, 이를 통해 에이징 효과를 확인할 수 있었다. A plasma hydrophobic coating on commercial fish feed was conducted to prolong the floating time of feed, thereby enhancing the feed consumption rate and reducing the contamination of water in fish farms. The hydrophobic coating on the fish feed was prepared using an atmospheric-pressure dielectric barrier discharge (DBD) plasma with hexamethyldisiloxane (HMDSO), toluene and n-hexane as the precursors. The effect of the parameters such as input power, precursor type and coating time on the coating performance were examined. The physicochemical properties of the coating layer were analyzed using a Fourier transform infrared (FTIR) spectrometer and a contact angle (CA) analyzer. The water CA increased after the coating prepara-tion, indicating that the surface changed from hydrophilic to hydrophobic. The FTIR characterization revealed that the hydro-phobic layer was comprised of functional groups such as CH3, Si-O-Si and Si-C. As a result of the hydrophobic coating, the floating time of the fish feed increased from several seconds to 3 minutes, which suggested that the plasma coating method could be a viable means for practical applications. Compared to the water CA measured as soon as the coating layer was prepared, the 6-day aged sample exhibited a substantial CA increase, confirming the aging effect on the improvement of the hydrophobicity.

이미지 이어붙이기를 이용한 인간-객체 상호작용 탐지 데이터 증강

이상백 ( Sang-baek Lee ),이규철 ( Kyu-chul Lee ) 한국정보처리학회 2023 정보처리학회논문지. 소프트웨어 및 데이터 공학 Vol.12 No.2

인간-객체 상호작용 탐지는 객체 탐지와 상호작용 인식을 함께 풀어야하는 분야로 탐지 모델의 학습을 위해서 많은 데이터를 필요로 한다. 현재 공개된 데이터셋은 규모가 부족하여 데이터 증강 기법에 대한 요구가 커지고 있으나, 대부분의 연구에서 기존의 객체 탐지, 이미지 분할분야에서 활용하는 증강 기법을 활용하고 있는 실정이다. 이에 본 연구에서는 인간-객체 상호작용 탐지 분야에서 활용하는 데이터셋의 특성을 파악하고, 이를 통해 인간-객체 상호작용 탐지 모델 성능 향상에 효과적인 데이터 증강 기법을 제안한다. 본 연구에서 제안한 증강 기법에 대한 검증을 위하여 실험 환경을 구축하고, 기존의 학습 모델에 적용하여 증강 기법을 적용할 경우에 탐지 모델의 성능 향상이 가능함을 확인하였다. Human-object interaction(HOI) detection requires both object detection and interaction recognition, and requires a large amount of data to learn a detection model. Current opened dataset is insufficient in scale for training model enough. In this paper, we propose an easy and effective data augmentation method called Simple Quattro Augmentation(SQA) and Random Quattro Augmentation(RQA) for human-object interaction detection. We show that our proposed method can be easily integrated into State-of-the-Art HOI detection models with HICO-DET dataset.

행정정보 데이터세트 기록관리를 위한 무결성, 진본성 보장 방안 연구

이상백(Sang-Baek Lee),채수성(Su-Seong Chai),이규철(Kyu-Chul Lee) 한국정보과학회 2015 한국정보과학회 학술발표논문집 Vol.2015 No.12