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Roy, Tapashi G.,Hazari, Saroj K. S.,Dey, Benu K.,Meah, Hazarat A.,Rahman, Md. S.,Kim, Dong I.,Park, Yu C. Taylor Francis 2007 Journal of coordination chemistry Vol.60 No.14
<P> Reactions of two diastereoisomers of 3,10-C-meso-3,5,7,7,10,12,14,14-octamethyl-1,4,8,11-tetraazacyclotetradecanes, Me8[14]ane (LA and LB) with Cd(NO3)2 in methanol produced trans-[CdL(NO3)2] (L = LA or LB). However, the third diastereoisomer, Me8[14]ane (LC) did not react with Cd(NO3)2. Trans-[CdLB(NO3)2] undergoes axial ligand substitution reactions with KSCN, KNO2, KCl, KBr and KI, in the ratio of 1 : 2 to yield white solid products corresponding to molecular formula [CdLBX2] where X = NCS-, [image omitted], Cl-, Br- or I-. Characterization has been carried out on the basis of elemental analysis, IR, UV-visible and 1H-, 13C- and 113Cd-NMR spectroscopy, as well as by magnetic moment and conductivity measurement. These complexes show different electrolytic behaviours in different solvents. In chloroform, they are noneletrolytic indicating that both anions coordinate to cadmium(II) with retention of original molecular formula [CdLBX2]; their 1 : 2 electrolytic nature in water reveals the formation of diaquo complexes [CdLB(H2O)2]X2. On the other hand, conductance values corresponding to 1 : 2 electrolyte in DMF indicate the formation of square pyramidal complexes [CdLB(DMF)]X2. The antimicrobial activities of these ligands and their complexes have been tested against some selected fungi and bacteria.</P>
Vibrational predissociation of aniline(water)<sub>n</sub><sup>+</sup> (n=1-12)
Roy, M.,Kim, K.K.,Song, J.K.,Choe, J.C.,Park, S.M. North Holland 2016 Chemical physics letters Vol.651 No.-
<P>Vibrational predissociation dynamics of aniline(water)(n)(+) cluster ions formed via resonance two photon ionization followed by the absorption of single infrared photon was investigated. A linear tandem time of flight mass spectrometer designed for this research was tested by the dissociation of aniline* at 266 nm and observed decay constant matched well with the previous result. The rate of dissociation of aniline(water)(n)(+) cluster increased with internal energy, whereas decreased with increasing the size of cluster, manifesting that the intramolecular vibrational energy redistribution precedes VP. The internal energies of the cluster ions were estimated from comparing the experimental and Rice-Ramsperger-Kassel-Marcus calculation results. (C) 2016 Elsevier B.V. All rights reserved.</P>
IoT-Based Health Big-Data Process Technologies: A Survey
( Hyun Yoo ),( Roy C. Park ),( Kyungyong Chung ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.3
Recently, the healthcare field has undergone rapid changes owing to the accumulation of health big data and the development of machine learning. Data mining research in the field of healthcare has different characteristics from those of other data analyses, such as the structural complexity of the medical data, requirement for medical expertise, and security of personal medical information. Various methods have been implemented to address these issues, including the machine learning model and cloud platform. However, the machine learning model presents the problem of opaque result interpretation, and the cloud platform requires more in-depth research on security and efficiency. To address these issues, this paper presents a recent technology for Internet-of-Things-based (IoT-based) health big data processing. We present a cloud-based IoT health platform and health big data processing technology that reduces the medical data management costs and enhances safety. We also present a data mining technology for health-risk prediction, which is the core of healthcare. Finally, we propose a study using explainable artificial intelligence that enhances the reliability and transparency of the decision-making system, which is called the black box model owing to its lack of transparency.
하이브리드 검출기법을 이용한 후보 차선검출에 관한 연구
박상주,오중덕,박찬홍,Park, Sang-Joo,Oh, Joong-Duk,Park, Roy C. 한국융합신호처리학회 2016 융합신호처리학회 논문지 (JISPS) Vol.17 No.1
자동차 보유량이 늘어남에 따라 남녀노소 모두 교통사고에 위협이 가해지고 있으며 교통사고가 자주 일어나는 점을 미연에 방지하기 위해 ADAS가 중요하다. 이러한 교통사고의 주범을 인지하고 방지하는 한 방법이 차선 검출을 이용하는 것이다. 따라서 본 논문에서는 영상처리를 통해 차선검출 기법을 연구하였고 영상처리에 의한 많은 에지 검출기법들 중 대표적인 소벨 에지 검출 기법과 캐니 에지 검출 기법을 사용하여, 두 가지 에지 검출기법을 통해 곡선과 직선의 차선 검출에서 가장 검출율이 좋은 기법을 찾아 직선의 차선을 검출하는 기법에 적용한다. 실험은 총 4,000프레임(주간영상 2,900프레임, 야간영상 1,100프레임)으로 실험을 수행하고, 실험 결과는 주간 영상에서 소벨 에지 검출 기법의 임계치는 2차미분차수로 검출하는 것이 가장 높은 후보 차선 검출율을 보였으며 검출율이 86.1%이고, 캐니 에지 검출 기법의 임계치는 Low=50, High=300에서 가장 높은 88.0%의 검출율을 보였다. As more people have cars, the threat of traffic accidents is posed on men and women of all ages. The main culprit of traffic accidents is driving while intoxicated or drowsy. The method to recognize and prevent the cause of traffic accidents is to use lane detection. In this study, a total of 4,000 frames (day image: 2,900 frames, night image: 1,100 frames) were used to test lane detection. According to the test, in the case of day image, when the threshold of Sobel edge detection technique was detected with second-order differential equation, there was the highest candidate lane detection rate which was 86.1%. In the threshold of Canny edge detection technique, the highest detection rate of 88.0% was found at Low=50, and High=300. In the case of night image, the threshold of Sobel edge detection technique, when horizontal calculation and vertical calculation had second-order differential equation, and when horizontal-vertical calculation had 1.5th-order differential equation, there was the highest detection rate which was 83.1%. In the threshold of Canny edge detection technique, the highest detection rate of 89.9% was found at Low=50, and High=300.
Cho, S. W.,Roy, S. K.,Chun, J. B.,Cho, K.,Park, C. S. SPRINGER SCIENCE + BUSINESS MEDIA 2017 Plant biotechnology reports Vol.11 No.2
<P>The Glu-B1al (Bx7(OE) + By8) allele is important for bread-making quality. The allele was found in a Korean wheat landrace using specific DNA markers. Molecular analyses were conducted to identify the overexpressed Bx7 (Bx7(OE)) subunit of the allele. The Korean wheat landrace (accession ID: IT166460) showed a similar protein expression level of Bx7 subunit, i.e., overexpression of Bx7 subunit towards cv. Glenlea, Canadian Western Red Spring wheat, which harbors Bx7(OE) subunit of Glu-B1al as detected on SDS-PAGE (sodium dodecyl sulfate poly-acrylamide gel electrophoresis). In addition, 2-DE (two-dimensional electrophoresis) analysis revealed similar protein expression patterns of the Bx7 subunit regions of IT166460 and Glenlea. The proportion of Bx7 to total HMW-GSs (high molecular weight glutenin subunits) in IT166460 (56.17 +/- 0.22%) was higher than that of Chinese Spring (34.75 +/- 1.03%) and even that of Glenlea (46.25 +/- 1.76%) as assessed by RP-HPLC (reverse-phase high-performance liquid chromatography). Overexpression of Bx7 subunit was caused by gene duplication and indels of the promoter region of the Bx7 gene. IT166460 attained the 43 bp indel of the promoter region, as did Glenlea, i.e., the amplicon size of IT166460 was the same as that of Glenlea. In addition, the nucleotides present in the duplicated gene in IT166460 were the same as those in Glenlea. Bx7(OE) subunit is critical for dough strength. However, most wheat accessions harboring the subunit are distributed in America. Furthermore, most Korean wheats have little genetic variation in glutenin composition and are associated with inferior bread quality. Hence, IT166460 could be used to improve bread-making quality in the Korean wheat breeding program.</P>