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( Ji Yeon Hong ),( Joon Hyuk Suh ),( Kapsok Li ),( Seong Jun Seo ),( Chang Kwun Hong ) 대한피부과학회 2017 대한피부과학회 학술발표대회집 Vol.69 No.1
Atopic dermatitis (AD) is a chronic inflammatory disorder that has increased in prevalence over the past 30 years. This disease is well known for its waxing and waning course, often showing prolonged symptoms. Mycosis fungoides (MF) is the most common type of cutaneous T-cell lymphoma and has a prolonged and progressive course characterized by patches, plaques, and tumor stages. Several studies have investigated the possible association between atopic eczema and cancer, yielding very controversial results. A 35-year-old female presented with disseminated erythematous scaly plaques on most of her body for 8 years. Based on the clinical findings of chronic pruritic plaques along with the histologic evidence of lichen simplex chronicus, atopic dermatitis was diagnosed. 15 months after various kinds of immunosuppressant treatment, a few intractable scaly plaques were left on her nose and thigh, which were finally confirmed as MF. Herein, we report a case of MF without circulating Sezary cells diagnosed 8 years after adult-onset severe atopic dermatitis.
Mutations in AP22.65 Accelerate Flowering in Arabidopsis thaliana
Ji Hong Xing,Feng Ru Wang,Jiao Jia,Jing Zhang,Li Li,Zhan Chen,Qiao Yun Weng,Ping Yang,Ye Zhang,Bin Zhao,He Long Si,Jin Gao Dong,Jian Min Han 한국식물학회 2013 Journal of Plant Biology Vol.56 No.1
Identification of the gene(s) responsible for floweringtime in Arabidopsis has significant implications. We used theT-DNA insertion library of Arabidopsis thaliana to screen anearly-flowering mutant that exhibits accelerated floweringunder short-day conditions. AP22.65, a novel flowering-timegene in that species, was isolated and identified via genomewalkingand bioinformatics analysis. The flowering time ofAP22.65-complementing plants was similar to that of theCol-0 wild type (WT). Conversely, its overexpression delayedflowering. Consistent with this phenotype, expression ofAP22.65 was decreased in the ap22.65-1 mutant, recoveredin AP22.65-complementing plants, and increased in AP22.65-overexpressing plants. Compared with the WT, expressionlevels of critical genes in different flowering pathways, i.e.,SPY, FLC, GI, CO, FT, and LFY, were down-regulated inloss-of-function mutants. Expression of AP22.65 was distributedin flowers, siliques, rosette leaves, and whole seedlings. Therefore, this gene may be a negative regulator of Arabidopsisflowering.
Autonomous swimming technology for an AUV operating in the underwater jacket structure environment
Li, Ji-Hong,Park, Daegil,Ki, Geonhui The Society of Naval Architects of Korea 2019 International Journal of Naval Architecture and Oc Vol.11 No.2
This paper presents the autonomous swimming technology developed for an Autonomous Underwater Vehicle (AUV) operating in the underwater jacket structure environment. To prevent the position divergence of the inertial navigation system constructed for the primary navigation solution for the vehicle, we've developed kinds of marker-recognition based underwater localization methods using both of optical and acoustic cameras. However, these two methods all require the artificial markers to be located near to the cameras mounted on the vehicle. Therefore, in the case of the vehicle far away from the structure where the markers are usually mounted on, we may need alternative position-aiding solution to guarantee the navigation accuracy. For this purpose, we develop a sonar image processing based underwater localization method using a Forward Looking Sonar (FLS) mounted in front of the vehicle. The primary purpose of this FLS is to detect the obstacles in front of the vehicle. According to the detected obstacle(s), we apply an Occupancy Grid Map (OGM) based path planning algorithm to derive an obstacle collision-free reference path. Experimental studies are carried out in the water tank and also in the Pohang Yeongilman port sea environment to demonstrate the effectiveness of the proposed autonomous swimming technology.
Li, Chengbin,Li, Zhenghua,Oh, Hwa Yong,Hong, Gyong Hee,Park, Jin Seo,Kim, Ji Man Elsevier 2018 CATALYSIS TODAY - Vol.307 No.-
<P><B>Abstract</B></P> <P>Highly ordered mesoporous Cu-Mn-Ce ternary metal oxide materials with various Cu/Mn molar ratios were successfully synthesized by using a nano-casting method from a mesoporous silica template with a cubic <I>Ia</I>3<I>d</I> mesostructure. The ternary metal oxide materials were characterized by X-ray diffraction (XRD), N<SUB>2</SUB>-sorption, electron microscopy, Raman spectroscopy, H<SUB>2</SUB>-temperature programmed reduction and CO-temperature programmed desorption. The XRD results indicated that the materials did not show any diffraction peaks corresponding to copper and manganese oxides, ensuring the formation of Cu<I> <SUB>x</SUB> </I>Mn<SUB>0.2-<I>x</I> </SUB>Ce<SUB>0.8</SUB>O<SUB>2</SUB> (<I>x</I> =0–0.2). The WGS activity of the ternary metal oxide catalysts increased as the molar ratios of Cu/Mn increased. Among the catalysts, the mesoporous Cu<SUB>0.18</SUB>Mn<SUB>0.02</SUB>Ce<SUB>0.8</SUB>O<SUB>2</SUB> catalyst exhibited the best catalytic activity in low temperature range with zero methane yield. Moreover, this catalyst showed excellent catalytic stability during the reaction. The observed enhancement in the WGS performances were attributed to high surface area, uniform crystalline framework with increased structural defect, highly dispersed copper and manganese within the ceria lattice or on the surface, and strong metal support interaction.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ordered mesoporous Cu-Mn-Ce ternary metal oxide catalyst showed an excellent WGS reaction performances. </LI> <LI> Copper and manganese, incorporated within the CeO<SUB>2</SUB> lattice, enhanced the activity. </LI> <LI> Mesoporous ternary metal oxides exhibited good nanostructural and catalytic stabilities. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
3D Path Tracking of Underactuated AUVs with General Form of Dynamics
Ji-Hong Li,Jung-Tae Kim,Mun-Jik Lee,Hyung-Ju Kang,Min-Jae Kim 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10
This paper proposes a 3D path tracking method for a class of torpedo-type AUVs (autonomous underwater vehicles) with general form of dynamics. For this kind of AUV, there are only three control inputs are available for its 6DOF 3D motion, and therefore it’s a typical underactuated system. First, we introduce certain two spherical coordinate transformations so as to transform the vehicle model into three-inputs-three-outputs second-order strict-feedback form. To avoid possible singularity problem in the recursive control design, an asymptotic modification of orientation concept is introduced. Proposed tracking scheme can guarantee the asymptotic stability of closed-loop system in the spherical coordinate frames.
( Ji Yeon Hong ),( Won Jong Oh ),( Kwang Ho Yoo ),( Kapsok Li ),( Beom Joon Kim ),( Chang Kwun Hong ) 대한피부과학회 2016 대한피부과학회 학술발표대회집 Vol.68 No.1
Thread lifting has become increasingly popular both for physicians and patients for its advantages in limited scarring, rapid recovery, and minimal complications compared with the incisional surgery. The usage of nonabsorbable polypropylene thread has especially been favored because of its durability. A 45-year-old woman presented with a protruding mass on the left temporal area for 2 years. She had a history of thread lifting 8 years ago. Histologic examination of biopsy specimen revealed a dense inflammatory cells`` infiltration in the dermis. This case emphasizes the importance of consistent and long-term follow-up evaluations to determine whether thread lifting causes delayed type complications.
Lipedematous Alopecia in an Asian Woman: Is It an Advanced Stage of Lipedematous Scalp?
( Ji Yeon Hong ),( Kapsok Li ),( Chang Kwun Hong ) 대한피부과학회 2018 Annals of Dermatology Vol.30 No.6
Lipedematous alopecia (LA) is a rare disease entity that manifests as increased thickness of subcutaneous fatty tissue in the scalp with a variable degree of acquired, non-scarring alopecia. Although the pathogenesis of alopecia in LA is not clear, it is assumed that the increased thickness of subcutaneous fat retards hair growth by disturbing the peripheral microenvironment of the hair bulb. LA is clinically distinguishable from lipedematous scalp (LS) in that LS is not associated with any hair abnormalities, while LA is characterized by variable degree of hair loss. However, both LA and LS share increased scalp thickness. Here, we describe a rare case of LA on the frontal scalp of an Asian woman, further characterize the clinical and histologic features, and suggest applying an integrated diagnosis as lipedematous diseases of the scalp. (Ann Dermatol 30(6) 701∼703, 2018)