디지탈 방사선 촬영술을 이용한 치근 흡수 판독에 관한 실험적 연구

오필교,김재덕 大韓口腔顎顔面 放射線學會 1995 Imaging Science in Dentistry Vol.25 No.2

The purpose of this study was to quantitatively evaluated experimental tooth root resorption for digital radiography. For this study, experimentally three root sites were used, and radiograms were taken with standardized apparatus. Digital imaging system were considered of NEC PC-9801(computer), TRINITRON(monitor), SONY XC-711 CCD camera. The display monitor had a resolution of 512X512 pixels. The obtained results were as following: 1. In the difference of the four X-ray film of the contrast correction, The contrast difference was one gray scale variation at mean value. 2. Viewing of the view box of the periapical radiographs, experimental tooth root resorption of the periapical area of the first premolar, middle of mesial surface of the first molar mesial root, middle of lingual surface of the first molar distal root were recognized by increased diameter. 3. On the analysis by histogram, the periapical area of the first premolar, the middle of mesial surface of the first molar mesial root were each recognized tooth root resorption of the 5, 6, 7 pixel by increased diameter. 4. On the analysis by histogram, the middle of lingual surface of the first molar distal root was each recognized tooth root resorption of the none, 3, 6 pixel by increased diameter.

한지슬러지-목재파티클 복합보드의 물리적 및 기계적 성질

이필우 서울대학교 농업개발연구소 1999 농업생명과학연구 Vol.3 No.-

This study was carried out to develop the Korean paper(Hanji) sludge-wood particle composite boards utilizing the relinquished sludges occurring from the making process of Korean classic paper Hanji. The bark of paper mulberry(Broussonetia kazinoki Sieb.) has been used as a raw material since past hundreds and thousands years. Korean paper(Hanji) sludge was divided into two kinds, the one was the white sludge from the first stage and the other was the black sludge occurring from the final stage of Korean paper(Hanji) making. Four levels of the mixed ratio of each white or black sludge to wood particle(10:90, 20:80, 30:70 and 40:60), three levels of the resin adhesives(PMDI, urea and phenol resin) and three levels of the density(0.60, 0.75 and 0.90) were designed to investigate the physical properties of Korean paper(Hanji) sludge-wood particle composite boards. From the results and discussion, it could be concluded as follows: By the results and discussion of physical and mechanical properties it is suggested that the white sludge-wood particle composite boards bonded with PMDI or black sludge-wood particle composite boards bonded with urea resin were made possibly with similar or better properties, compared with general particleboard until the addition of 20% Korean paper sludge into wood particle.

Paraquat 투여에 의한 가토 신장 변화에 대한 연구

이필호,김의한,강상균 순천향대학교 1992 논문집 Vol.14 No.4

To investigate the effect of Paraquat(PQ)on the kidney, Parquat was injected at dose of 10,20,40,80,160mg/kg intraperitoneally and 20,40,80mg/kg intravenously. The changes of renal function were estimated by blood urea nitrogen(BUN)and blood creatinine and compared to histologic findings of renal tissue. From these, we concluded: 1. Intraperitoneal injection of PQ at 10, or 20mg/kg increased BUN after 5 days and it begins to decrease back toward normal range after 9 days. The increase in BUN was prompter in cases of intravenously injection. :The increase in BUN was observed soon after injection and was sustained for 5 days, after when it gradually return to normal range. However, the different route of injection. PQ at 10 or 20mg/kg hardly affect the creatinine level. But the lethal dose(40mg/kg)of PQ increased blood creatinene level immediately after injection. Because creatinine increased only when the lethal dose(40mg/kg)was injected while BUN increased both at non lethal does and lethal does of PQ, creatinine level appeared to have more prognostic value than BUN. 3. In the rabbits which survived for more than 15days from toxicity of PQ, the renal tubular necrosis is rarely observed, suggesting that the renal damage by PQ was reversible. In addition, the degree of histologic renal damage did no necessarily match with the degree of biochemical disturbances demonstrated by BUN and blood creatinine.

악성 섬유성 조직구종에 관한 연구

최의환,오필교,김영진 大韓口腔顎顔面 放射線學會 1994 Imaging Science in Dentistry Vol.24 No.2

Malignant fibrous histiocytoma(MFH) is relatively rare in the oro-maxillofacial region, particularly in the oral cavity. MFH usually arise in the extremities, the thigh being the most common site. The incidence of malignant fibrous histiocytoma in bones is rather low compared with that in soft tissues. MFH is predominant in the 40s and 50s. Histologically, the lesion are said to show high cellularity with fibrous stroma, cellular and unclear pleomorphism, and admixture of fibroblast-like spindle cells, which tend to be arranged in whorls or cartwheel or storiform patterns, rounded mononuclear cells and multinucleated giant cells. The cells frequently have abundant eosinophilic cytoplasm which has a foamy or vesicular appearance. Treatment consists of varying combinations of radiation therapy, chemotherapy, and surgery. We have observed a case of malignant fibrous histiocytoma occured in the right maxilla of 32-year-old woman.

상수도관로중 주철관종의 잔존수명 평가에 관한 연구

이현동,배철호,홍성호,황재윤,곽필재 한국물환경학회 2004 한국물환경학회지 Vol.20 No.3

Residual wall thicknesses, corrosion rates, and residual life of thirty four samples of cast iron pipes(CIPs) and ductile cast iron pipes(DCIPs) collected from water mains of B city were studied to estimate their remaining service life or optimum time of rehabilitation. The internal maximum corrosion depths of samples measured using a dial gauge after shot blasting were twice higher than the external in most cases. Therefore corrosion of water pipes was much more affected by internal water quality than soil. Residual wall thicknesses of DCIPs were higher than those of CIPs. That reason was thought to be that DCIPs have been protected from internal corrosion by lining cement mortar. Residual life calculated by maximum corrosion rate was ranged up to 44 years with 12.40 years average. Since most CIPs were much deteriorated, rehabilitation plan should be established soon in B city. Residual life of DCIP was 33.52 years average. When cement mortar lining is used up by neutralization of DCIPs. DCIP also should be rehabilitated.

Guest Editorial on the Special Section on Bio-Inspired Control Theory and Applications

Phill Kyu Rhee 대한전기학회 2008 International Journal of Control, Automation, and Vol.6 No.6

GO-10 : Poor prognosis after conservative surgery in stage I mucinous epithelial ovarian cancer

( Phill Seung Jung ),( Shin Wha Lee ),( Jeong Yeol Park ),( Dai Shik Suh ),( Dae Yeon Kim ),( Jong Hyeok Kim ),( Yong Man Kim ),( Young Tak Kim ),( Joo Hyun Nam ) 대한산부인과학회 2014 대한산부인과학회 학술대회 Vol.100 No.-

목적: To evaluate the oncologic safety and to identify prognostic factor for recurrence in premenopausal women with stage I mucinous epithelial ovarian cancer (mEOC) who underwent conservative surgery. 방법: We enrolled 97 patients who were 1) premenopausal at the time of surgery and 2) confirmed to be the FIGO stage I. The surgical procedure of conservative surgery was unilateral salpingo-oophorectomy with/without contralateral ovarian wedge resection. 결과: The median age was 33 (range: 13-50) years at the time of surgery. Sixty-three (64.9%) patients were stage Ia, and 34 (35.1%) were Ic. Fifty-three (54.6%) patients underwent conservative surgery, and adjuvant chemotherapy was administrated to 61 (62.9%) patients. During 73.7 (range: 7.1-243.5) months of the median follow-up duration, 13 (13.4%) patients recurred and 8 (8.2%) of them died of disease. Among patients who underwent conservative surgery, there were 10 recurrences and the majority of recurred site was intraperitoneal cavity (n=8) with median age of 25 (range: 14-46) and median PFS of 17.8 (range: 5.1-53.3) months. In multivariate analysis, a significantly poorer prognosis was noted in patients who underwent conservative surgery (HR: 6.26, 95% CI: 1.53-25.53, p=0.011) and in patients with high preoperative CA-125 (HR: 1.98, 95% CI: 1.26-3.11, p=0.003). In patients with high preoperative CA-125 (>35U/mL, n=48), conservative surgery caused significantly higher recurrence rate (HR: 5.73, 95% CI: 1.22-27.03, p=0.027). 5-year disease-free survival rate was significantly lower in patients who underwent conservative surgery than in patients who did not (77.7% vs. 94.2%, p=0.047). 결론: In conclusion, conservative surgery might cause the poor prognosis in premenopausal women with stage I mEOCs, particularly with high preoperative CA-125 level. The further multicenter study with larger cohort would be needed to verify the oncologic safety of conservative surgery in mEOCs.

International Young Doctors` Session : Session 1 ; Prognosis prediction model for FIGO stage I mucinous epithelial ovarian carcinoma

( Phill Seung Jung ),( Shin Wha Lee ),( Jeong Yeol Park ),( Dai Shik Suh ),( Dae Yeon Kim ),( Jong Hyeok Kim ),( Young Man Kim ),( Young Tak Kim ),( Joo Hyun Nam ) 대한산부인과학회 2013 서울심포지움 Vol.18 No.-

Fabrication of Oxide Materials for One-Dimensional Photonic Crystals

Phill Jin Kim,이영백,Huang Mei Dong,Lu Yue Hui,Park Sang Yoon,이주열 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.3

One-dimensional (1D) photonic crystals (PCs) were fabricated, and their optical properties were investigated both experimentally and theoretically. The fabricated 1D PCs were basically multilay- ered .lms composed of a high-index material (TiO2) and a low-index one (Al2O3). All the PCs were prepared in an ultrahigh-vacuum radio-frequency magnetron-sputtering system. According to the simulation results, if the repetition number is larger than 8, an almost complete photonic bandgap (PBG) can be achieved. The transmittance spectrum of the fabricated PC was measured, and a PBG phenomenon developed at the designed wavelength. The measured spectrum was compared with the spectrum simulated by using the transfer-matrix method and was in good agreement with the simulated one.

Case Report : A case report of prenatally diagnosed tetrasomy 18p

( Phill Seung Jung ),( Hye Sung Won ),( In Ji Cho ),( Min Kyung Hyun ),( Jae Yoon Shim ),( Pil Ryang Lee ),( Ahm Kim ) 대한산부인과학회 2013 Obstetrics & Gynecology Science Vol.56 No.3

Tetrasomy 18p, one of the most commonly observed isochromosomes, consists of two copies of the p arms on chromosome 18[i(18p)]. It is known as a de novo occurrence of non-disjunction or centromeric mis-division during meiosis II in the vast majority of cases. It has a prevalence of 1/140,000-180,000 live births and affects both genders equally. A 28-year-old woman was referred at 33+2 weeks gestation to rule out fetal congenital heart disease. Her prenatal ultrasonography showed intrauterine growth retardation, cardiomegaly, and imperforate anus. Doppler ultrasonographic finding showed fetal anemia. Tetrasomy 18p was confirmed by conventional karyotyping and fluorescence in situ hybridization. Because of its very low prevalence rate, only several cases of tetrasomy 18p has been reported worldwide and it has not yet been reported in Korea before. Therefore, we report a case of prenatally diagnosed tetrasomy 18p.