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Self-erasable titanium oxide resistive memory devices
장진곤,최한형,김민성,김재경,정승준,박종혁 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.78 No.-
We fabricated a titanium oxide (TiO2) resistive memory device utilized to naturally erasable device with asimple cross-bar array structure inhibiting sneak paths using selecting property. The Al/TiO2/Al memorydevice showed conventional nonvolatile and bipolar resistive switching properties with a vacancy-baseddrift conduction procedure. The conductingfilament could be removed through redistribution of theoxygen vacancy to the active bulk region resulting in self-erasable properties, which have made itpossible to guide unwanted information to be removed naturally. This self-erasable memory device hasthe potential to be utilized for the storage of susceptible information which should be eliminated after asufficient length of time.
장진곤(Jin Gon Jang),박성현(Sung Hyun Park),이광훈(Kwang Hoon Lee) 대한피부과학회 1988 대한피부과학회지 Vol.26 No.6
A 26-year-old man presented with a bluish speckled patch on the dorsum of the left hand. It had apperaed at birth as a bluish spot. Since adolescence the lesion extended and at the time of visiting hospital it covered the most part of the dorsum of the left hand and even some palmar aspect. The histopathological and ultrastructural examination revealed numerous dermal melanocytes, mainly in the upper dermis. Clinically and pathologically, the patient was diagnosed as having dermal melanocyte hamartoma, a distinct type of dermal melanocytosis.
장진곤(Jin Gon Jang),이광길(Kwang Gil Lee),박윤기(Yoon Kee Park),전수일(Soo Il Chun) 대한피부과학회 1989 大韓皮膚科學會誌 Vol.27 No.4
Nineteen patients with lichen striatus were investigated by clinical data, clinical photographs and histopathologic study by the pattern analysis method of Ackermsn. Results were as follows '. 1. The male to female ratio was 1: 1.1, and average age was 7.8 years. Seven- teen patients (about 90%) visited hospitals during summer season. 2. Nine cases showed superficial perivascular dermatitis, 9 cases interface dermatitis (vacuolar type : 7, lichenoid type, 2), 1 case nodular dermatitis and 2 rases interface dermatitis with nodular dermatitis. 3. In the epidermis, 9 cases showed variable nurnber of dyskeratotic cells. One case showed finding of perforating lichen striatus. 4. Two cases showed inflammation around acrosyringium, 4 cases around hair follicle, 6 cases around eccrine sweat gland and 1 case showed perineural inflamrnation. Summarizing above results, histopathology of lichen striatus characteristically shows superficial perivascular dermatitis, interface dermatitis, and infiltration of inflammatory cells around the sweat gland, which helps to diagnose the disease.
장진곤(Jin Gon Jang),김수찬(Soo Chan Kim),윤문수(Moon Soo Yoon),전수일(Soo Il Chun) 대한피부과학회 1989 대한피부과학회지 Vol.27 No.1
We report a case of dilated pare of Winer occuring in a 33-year-oid female patient. Dilated pore belongs to adenoma or organoid group of benign hair differentiation tumors. The patient has had a giant comedone on the right submandibular area for 1 month. Histopathologic features revealed rnarkedly dilated pilar infundibulum lined by epidermis that is atrophic near the ostium but hypertrophic deeper in the cystic cavity. Three months after excisional biopsy, there was no recurrence.