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A Study of Effective Defense-In-Depth Strategy of Cyber Security on ICS
Seong-Muk Choi,Rae-Hyung Kim,Ga-Ye Kim,Hyeon-Kyung Lee,GwangYong Gim,Jong-Bae Kim 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.5
The system of SCADA(Supervisory Control and Data Acquisition Security) used in electricity, water, petroleum and gas, transportation as well as manufacturing, is to collect scattered data and to monitor assets related as a centralized suppression system. ICS system, including current SCADA, is not isolated from outside, being connected with IT solution, and can operate equipment through broadband network, instead of accessing physically. Accordingly, the security accident of suppressing system can occur in the fields of antagonistic nations, terrorists, foundational facility invaders, natural disasters and ill-will or accidental actions. The security control examined in this study provides a defense-in-depth strategy which is applicable to the effective cyber security strategy regarding ICS to protect the confidentiality of information, zero defect, availability through the classification of control, operational control and technological control.
( Kyung Muk Jeong ),( Ji Yun Seo ),( Aeree Kim ),( Seung-kyu Han ),( Yoo Sang Baek ) 대한피부과학회 2021 大韓皮膚科學會誌 Vol.59 No.4
Sebaceous carcinoma is a malignant neoplasm frequently classified as periocular or extraocular. Extraocular sebaceous carcinoma is a relatively rare tumor commonly appearing in the head and neck region. Furthermore, extraocular sebaceous carcinoma limited to the epithelium, which is called ‘extraocular sebaceous carcinoma in situ’ is extremely rare with less than 10 cases reported in the literature. Herein, we present the case of a 93-year-old female who diagnosed as extraocular sebaceous carcinoma in situ occurring concurrently with actinic keratosis. In the present case, extraocular sebaceous carcinoma in situ as identified without any connection to an adnexal component but concurrent with actinic keratosis. This case is evidence that extraocular sebaceous carcinoma can arise from the epidermis and the tumor cells of intraepidermal squamous neoplasia can differentiate toward malignant sebocytes. (Korean J Dermatol 2021;59(4):307∼309)
Extraction Yield and Nutraceuticals of Mushroom Pholita spp.
Soo-Muk Cho,Hong-Ju Park,Gun-Shik Seo,Jae-Duck No,Jong-Soo Lee 한국버섯학회 2006 한국버섯학회지 Vol.4 No.2
This study was performed to obtain basal data for development of new functional food by using mushroom Pholiota spp.. Among several kinds of extracts, water extracts of Pholiota adiposa ASI 24027 showed the highest solid yield of 58.7%. Crude protein of Pholiota adiposa ASI 24015 and β-glucan contents of Pholiota adiposa ASI 24005 were 25.0% and 0.66%, respectively. K and Mg were also contained plentifully in the fruiting body of Pholiota adiposa ASI 24004 (3,649 mg and 138 mg/100g dried fruiting body, respectively) Amino acid and total fatty acid contents were similar between almost all of Pholiota spp.,
( Seon-muk Choi ),( An-soo Jang ),( Min-hyeok An ),( Yun-gi Lee ),( Pureun-haneul Lee ) 대한결핵 및 호흡기학회 2021 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.129 No.-
Background Diesel exhaust particles (DEP) can cause and exacerbate asthma and COPD. Rootletin is the main component of the ciliary rootlet and functions as a centriole linker connecting the two mother centrioles. The impact of air pollutants on Rootletin in asthma remain to be clarified. Objective: The aim of study was to identify protein expression in normal human bronchial epithelial (NHBE) cells and mice exposed to DEP, and to know the impact of Rootletin on asthma. Methods Rootletin level was checked in the plasma of asthmatic patients and control subjects. The relation of Rootletin with clinical variables in patients with asthma was observed. Rootletin expression was estimated using ELISA, immunoblotting, and immunohistochemical stain. A proteomic approach was used to determine the different expression of proteins at 8hr and 24hr after treatment of DEP 5 ug/ml and 10 ug/ml to NHBE cells. Results Rootletin level had higher concentrations in plasma from patients with asthma (n = 18) than that of healthy controls (n =10). Rootletin level was correlated with FVC, FEV1 %pred. and FEV1/FVC in patients with asthma. NHBE cells following DEP exposure for 8hr and 24hr have altered various protein spots. Rootletin proteibn expression in lung tissue was increased in DEP exposed mice compared to control mice. Rootletin expression was increased in NHBE cells treated house dust mite by Western blotting. Conclusion These Results indicate that Rootletin may be an important role for airway disease caused by DEP, and a marker for asthma exacerbation.
Combustion and Emission Characteristics of a Natural Gas Engine under Different Operating Conditions
Haeng Muk Cho,Bang Quan He 대한환경공학회 2009 Environmental Engineering Research Vol.14 No.2
Natural gas is a promising alternative fuel of internal combustion engines. In this paper, the combustion and emission characteristics were investigated on a natural gas engine at two different fuel injection timings during the intake stroke. The results show that fuel injection timing affects combustion processes. The optimum spark timing (MBT) achieving the maximum indicated mean effective pressure (IMEP) is related to fuel injection timing and air fuel ratio. At MBT spark timing, late fuel injection timing delays ignition timing and prolongs combustion duration in most cases. But fuel injection timing has little effect on IMEP at fixed lambdas. The coefficient of variation (COV) of IMEP is dependent on air fuel ratio, throttle positions and fuel injection timings at MBT spark timing. The COV of IMEP increases with lambda in most cases. Late fuel injection timings can reduce the COV of IMEP at part loads. Moreover, engine-out CO and total hydrocarbon (THC) emissions can be reduced at late fuel injection timing.
Cutaneous plasmacytosis: generalized form versus localized form
( Kyung Muk Jeong ),( Jin Young Song ),( Yoo Sang Baek ),( Jiehyun Jeon ),( Hae Jun Song ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1
Cutaneous Plasmacytosis(CP) is a rare skin disorder, only seven cases has been reported in Korea. It is characterized by an infiltration of mature plasma cells in skin and other various organ systems like lymph nodes, bone marrow. Therefore, some authors even named this disease entity as ‘Cutaneous and systemic plasmacytosis’. Laboratory tests may show polyclonal hypergammaglobulinemia. The cutaneous manifestation is characterized by round or oval, red-brown to dark brown poorly circumscribed macules, patches, nodules mainly on the face, nape, trunk, and axillae in adults. Histologically, there is dense, superficial and deep perivascular and periadnexal infiltrate of mature plasma cells without atypia. Etiology and pathogenesis are not known, and given the rarity of CP, most experience with treatment response is derived from case reports without consensus on treatment methods. Most CPs feature multiple skin lesions(generalized form), but sometimes they show localized distribution(localized form), so we would like to report by comparing two cases of generalized form CP and other two cases of localized form CP, based on clinical and laboratory differences.
A Study on the Malicious Process Detection System Model based on Security Agent
Seong-Muk Choi,Yeol-Joo Ryou,Hoo-Ki Lee,Hee-Hoon Cho,Jong-Bae Kim 한국정보통신학회 2015 2016 INTERNATIONAL CONFERENCE Vol.7 No.1
As recently use of Internet gets increased rapidly, infection path through the network becomes diverse. In particular, attacks by Bot mainly work at C&C (command-andcontrol) server but it can be secured just by blocking IP because C&C server runs in form of IP. However, these attackers too get gradually intelligent as they try to connect periphrastically in order to avoid server blocking. Once these malicious codes infiltrate user’s system, it is not easy to detect it through general detection method while it is running. In this paper, so, we propose malicious process detection system based on security agent in order to prevent damage caused by malicious code infection from being spread.
Paranasal cutaneous sinus tract of dental origin from the upper tooth
( Kyung Muk Jeong ),( Anna Kim ),( Yoo Sang Baek ),( Hae Jun Song ),( Jiehyun Jeon ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1
A cutaneous sinus tract of dental origin is the most common type of cutaneous fistula that occurs on the face. It is a syndrome rather than a disease entity and is composed of a periapical abscess, sinus tract and granulomatous skin change at the opening of the tract. But the disease is often misidentified as a simple “skin-only” problem because of unawareness of this disease entity and the general absence of dental symptoms. Early correct diagnosis and appropriate dental treatment can prevent unnecessary and ineffective antibiotic therapy or surgical procedure. A 66-year-old woman presented the clinic with an erythematous rubbery nodule on the left side of the paranasal area adjacent to alar without any symptom. Histopathologic examination was done to rule out possible tumorous condition and revealed granulomatous inflammation with abscess formation. Computed tomography (CT) was performed to evaluate the relationships of the abscess to internal structures. CT showed a periapical abscess of tooth #23. We diagnosed it as a cutaneous sinus tract of dental origin and referred the patient to her dentist for treatment. Midface cutaneous sinus tract of dental origin is rare, and it is easy to miss the diagnosis at the first visit. When encountered with a paranasal nodule, dermatologists should consider the cutaneous sinus tract of dental origin as a differential diagnosis.