Hyperspectral Imaging labelling tool using preprocessing and edge detection

Sangho Jo,Sungho Kim 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10

Deep learning research using hyperspectral imaging data is actively taking place. Hyperspectral imaging data has hundreds of data for each pixel. The data present in each pixel has an independent presence, for which reason ground truth for deep learning training consists in segmentation format. Therefore, the class must be assigned to each pixel, so the data labelling must be refined. We felt the need for a labelling tool suitable for hyperspectral data because the current segmentation labelling tool is designed as a technique for specifying areas directly by humans. For this reason, in this paper, we considered the relationship of light reflection between light sources and objects, and created a hyperspectral labelling tool by applying the proposed preprocessing technique and edge detection by wavelength.

Palisaded neutrophilic granulomatous dermatitis in systemic sclerosis overlap syndrome

( Sangho Jeong ),( Won Park ),( Seong Ryul Kwon ),( Mie Jin Lim ),( Minjae Jo ),( Jeonghyun Shin ),( Kyong-hee Jung ) 대한내과학회 2015 대한내과학회 추계학술대회 Vol.2015 No.1

The overlap syndrome between systemic sclerosis (SSc) and rheumatoid arthritis (RA) is a rare autoimmune disease characterized by a distinct genetic, immunological, and clinical entity. Patients with the overlap syndrome show a mixed serological pattern resembling both SSc and RA. Palisaded neutrophilicgranulomatous dermatitis (PNGD) is a type of inflammatory dermatosis associated with autoimmune disorder. PNGD has been reported to occur in patients with RA, systemic lupus erythematosus, lymphoproliferative disorders, systemic vasculitis, and other disorders. However, to our knowledge, the occurrence of PNGD in patients with SSc-RA overlap syndrome has not yet been reported. A 63-year-old woman presented with painful and itchy erythematous annular nodules in both the right and left soles. Approximately 1year ago, she was diagnosed with SSc RA overlap syndrome on the basis of the presence of swelling in her hands, sclerodactyly, Raynaud phenomenon, arthritis, and interstitial lung disease. She showed positive results for rheumatoid factor, anti-cyclic citrullinated peptide antibody, and anti-topoisomerase-I antibody. The results of a biopsy of the nodules in her soles were consistent with PNGD. That is, interstitial and perivascular degenerated collagen bundles surrounded by neutrophils were observed in the deep dermis. She was diagnosed with PNGD accompanied by SSc-RA overlap syndrome. We continued the treatment for her underlying SSc-RA overlap syndrome and added dapsone and glucocorticoids. She was advised to avoid cold exposure and weight-bearing activities. Soon after, the lesion seemed to have improved. But three months later, it worsened, prompting us to prescribe additional glucocorticoids. At present, the lesion waxes and wanes. PNGD is known as a self-limiting disease, and management of the underlying disease is most important. However, PNGD in a patient with SSc-RA overlap syndrome requires highly rapid and active management because of poor peripheral circulation in SSc. Although PNGD with SSc-RA overlap syndrome is very rare, clinical awareness of this combination is important to prevent aggravation of ulceration.

Stellera chamaejasme and Its Main Compound Luteolin 7-O-Glucoside Alleviates Skin Lesions in Oxazolone- and 2,4-Dinitrochlorobenzene-Stimulated Murine Models of Atopic Dermatitis

Jo, Beom-Geun,Park, No-June,Jegal, Jonghwan,Choi, Sangho,Lee, Sang,Yi, Li,Kim, Su-Nam,Yang, Min Georg Thieme Verlag KG 2019 Planta medica Vol.85 No.7

<B>Abstract</B><P> Stellera chamaejasme, also known as “Langdu”, has been traditionally used for the management of skin-related diseases such as psoriasis and skin ulcers. The aim of this study was to determine whether S. chamaejasme and its major component, luteolin 7-O-glucoside, have a preventive effect on the development of atopic dermatitis in oxazolone-treated BALB/c mice and 2,4-dinitrochlorobenzene-treated hairless mice. The epicutaneous applications of oxazolone and 2,4-dinitrochlorobenzene evoke an experimental murine atopic dermatitis-like reaction in BALB/c mouse ears and SKH-1 hairless mice. Atopic skin symptoms, including erythema (redness), pruritus (itching), exudation (weeping), excoriation (peeling), and lichenification (skin thickening), responded to treatment with S. chamaejasme aerial parts EtOH extract for 2 or 3 weeks. Histopathological examination revealed S. chamaejasme aerial parts EtOH extract significantly reduced inflammatory cell infiltration when applied to atopic dermatitis mice. In addition, luteolin 7-O-glucoside, the major active compound of the S. chamaejasme aerial parts EtOH extract, decreased serum IgE and IL-4 levels and transepidermal water loss and increased skin hydration, therefore exhibiting strong anti-atopic dermatitis activity in 2,4-dinitrochlorobenzene-induced atopic dermatitis mice. In this study, we confirmed antipruritic and antidermatitic effects of S. chamaejasme extract and its main component luteolin 7-O-glucoside in atopic dermatitis murine models. The study shows S. chamaejasme aerial parts EtOH extract and luteolin 7-O-glucoside are most likely to be potential drug candidates for atopic dermatitis treatment.</P>

A new flavonoid from <i>Stellera chamaejasme</i> L., stechamone, alleviated 2,4-dinitrochlorobenzene-induced atopic dermatitis-like skin lesions in a murine model

Jo, Beom-Geun,Park, No-June,Jegal, Jonghwan,Choi, Sangho,Lee, Sang Woo,Jin, Hang,Kim, Su-Nam,Yang, Min Hye Elsevier 2018 INTERNATIONAL IMMUNOPHARMACOLOGY Vol.59 No.-

<P><B>Abstract</B></P> <P> <I>Stellera chamaejasme</I> L. (family Thymelaeaceae), also known as ‘<I>Langdu</I>’, has been traditionally used to treat of skin-related diseases, such as, psoriasis and skin ulcers. The aim of this study was to identify the biologically active component of <I>S</I>. <I>chamaejasme</I> and evaluate its preventive effects on IL-4 and mast cell degranulation in RBL-2H3 cells and on the development of atopic dermatitis (AD) in 2,4-dinitrochlorobenzene (DNCB)-treated SKH-1 hairless mice. A novel flavonoid, genkwanin 5-<I>O</I>-xylosyl(1 → 2)glucoside (named stechamone), and three known compounds (umbelliferone, luteolin, and luteolin-7-<I>O</I>-glucoside) were isolated from the aerial parts of <I>S</I>. <I>chamaejasme</I> using chromatographic methods. Of these four compounds, stechamone most potently inhibited IL-4 production and mast cell degranulation in RBL-2H3 cells. Topical application of 0.5% stechamone improved atopic skin symptoms, including, erythema (redness), pruritus (itching), exudation (weeping), excoriation (peeling), and lichenification (skin thickening) in DNCB-treated AD mice by accelerating skin barrier recovery function and suppressing inflammatory cell infiltration. In addition, stechamone attenuated DNCB-induced increases in IL-4 (an inflammatory T<SUB>H</SUB>2 cytokine) expression and in serum IgE levels in our murine model of AD. DNCB induced AD-like skin lesions, but treatment with stechamone exhibited strong anti-atopic activity by regulating skin barrier function and reducing inflammatory responses. The results obtained suggest stechamone is a potential anti-atopic agent and treatment for skin inflammatory diseases.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A new flavonoid, stechamone, was isolated from <I>Stellera chamaejasme</I>. </LI> <LI> Stechamone exhibited potent IL-4 inhibitory activity in RBL-2H3 cells. </LI> <LI> 2,4-dinitrochlorobenzene was used to induce atopic dermatitis (AD) in hairless mice. </LI> <LI> Stechamone appeared to exert strong anti-AD effects on DNCB-stimulated mice. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Security Engine Management with GUI

Suhyung Jo,Kiyoung Kim,Sangho Lee 대한전자공학회 2005 ITC-CSCC :International Technical Conference on Ci Vol.2005 No.2

Strain-Controllable Magnetism in Co Decorated Pyridinic N-Doped Graphene

Seungchan Jo,Sangho Lee,Kyung-Han Yun,Yubin Hwang,Yong-Chae Chung IEEE 2014 IEEE transactions on magnetics Vol.50 No.8

<P>An external strain is suggested as an effective means to finely control the magnetic properties of a candidate medium for future spintronics devices. To demonstrate the potential of this concept, the biaxial strain effects on the magnetic moment of Co adatom on pyridinic N-doped graphene (PNG) sheet were investigated using density functional theory calculations. Under the strain from -5% to 5%, the magnetic moment of the Co adatom on PNG was increased continuously from 1.72 to 1.95 μ<SUB>B</SUB>. Also, Co adatoms are expected to be dispersed on the PNG surface without metal clustering in this range of applied strain due to its strong binding with the pyridinic nitrogen defects. From these results, it is anticipated that reliable control of magnetism in Co decorated PNG system is available by use of an external strain.</P>

실시간 산불 모니터링을 위한 이벤트 처리 기반 저전력 저비용 무선 센서 네트워크

최상호(Sangho Choe),유정화(Jeong-Hwa Yoo),폰수게수라니(Ponsuge Surani Shalika Tissera),강조인(Jo-In Kang),양희경(Hee-Kyung Yang) 대한전기학회 2020 전기학회논문지 Vol.69 No.5

In this paper, we propose an event-driven low-power low-cost wireless sensor network (WSN) for real time wildfire monitoring. The proposed system will be mainly deployed and operated in a fire alert (or monitoring) area that could be divided into several sectors, each sector consisting of a controller (AP: access point) and its controlled nodes. For the evaluation of the proposed system, we implement a test bed (TB) using Arduino Uno board that has a smoke detector and a ZigBee module. The presented sensor nodes that are operated in power saving mode (PSM) during most of idle period have a longer battery life. Once a node detects smoke sample (which is termed as sensData) that is larger than a given threshold, it will generate a transmission message, called msgSensInfo (msgSensInfo1 for node fusion or msgSensInfo2 for AP fusion), and transmit that message to the AP and then the remote server. When a sensing event or a wake-up message event occurs, the presented node system is woken up from PSM, and gives a prompt (real-time) response including sensing message msgSensInfo generation and its transmission to AP. The proposed system has a data fusion algorithm collecting and synthesizing either multiple spatial samples (in case of AP fusion) or multiple time samples (in case of node fusion) that improves the fire detection performance further. Therefore, compared to existing low-cost WSN schemes, the proposed low-cost WSN scheme would be better at the perspective of real time performance, cost-effectiveness, and life-cycle such that it would be a good candidate for wildfire prevention as well as initial fire fighting.

액셀러레이터 컨트롤 성능 향상에 관한 연구

조희영(HeeYoung Jo),이상호(SangHo Lee) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2007 No.11

A comparative survey on SAR image segmentation using deep learning

Ohtae Jang,Sangho Jo,Sungho Kim 제어로봇시스템학회 2022 제어로봇시스템학회 국제학술대회 논문집 Vol.2022 No.11

Synthetic Aperture Radar (SAR) image is a radar system that observes topographic maps using microwaves as an active sensor. Due to the backscattering characteristics of SAR, speckle is distributed in the image, making it difficult to analyze. This paper investigates the classically used unsupervised method of SAR image segmentation that can easily recognize and analyze SAR images and the recently used deep learning algorithm, and compare the accuracy using performance metrics. Although the method using deep learning has the problem of insufficient dataset, it improves performance by 10-20% compared to unsupervised. Also, among deep learning algorithms, how the algorithms used in Electro Optical / Infrared (EO / IR) are used in SAR images and problems are investigated. In a recent study, the SAR image considered as a visible light image and applied it to a deep learning algorithm using eo to obtain results. In the future, more benchmark datasets for SAR images should be built, and research on deep learning algorithms using SAR data information will be conducted.

GNSS 대안항법의 필요성 및 요구사항 분석

조상훈(Sanghoon Jo),강자영(Jayoung Kang),고상호(Sangho Ko) 제어로봇시스템학회 2012 제어로봇시스템학회 합동학술대회 논문집 Vol.2012 No.7

최근 항공분야에서는 위성항법시스템(GNSS, Global Navigation Satellite System) 기술을 활용하여 항공기의 위치정보 및 운항 효율성을 높이고 있다. 그러나 태양흑점 폭발과 같이 자연적으로 발생하는 교란현상 뿐만 아니라 인위적 간섭을 통해 위성신호를 교란시키는 현상이 빈번하게 발생하고 있다. 현재 항공기에서 사용하는 항법은 GPS 항법 외에 종래의 지상기반항법, 관성항법(INS, Inertial navigation system)을 사용하기 때문에 항공기 운항에 미치는 피해는 미미하나 국가별, 지역별로 위성 기반의 항법시스템으로 대체하고 있는 추세임에 따라 대안항법에 대한 연구 및 관련 항법시스템의 고도화도 같이 이루어져야 한다. 본 논문에서는 항공분야에서 GNSS 대안항법의 필요성을 검토하고 이에 따른 대안항법의 요구사항에 대하여 살펴보고자 한다.