Alumina와 zirconia가 치과용 코아 도재의 물리적 성질에 미치는 영향에 관한 실험적 연구

신현수,이상진,이근우,Shin Hyeon-Soo,Lee Sang-Jin,Lee Keun-Woo 대한치과보철학회 1993 대한치과보철학회지 Vol.31 No.3

This study investigated the effect of filler particle size and weight% on mechanical properties of dental core porcelain. In alumina, variation in particle size and weight% and in zirconia, variation in weight%, all specimens were tested three-point bending strength, transmittance, thermal expansion coefficient, porosity and shrinkage and observed with SEM and analysed with X-ray diffractometer. In order to develop shrink-free porcelain, after firing alumina only, glass wasinfiltrated. And aluminum was added to alumina with the expanding character of aluminum oxidize into alumina, and was followed by second firing of glass infiltration procedure. Then mechanical properties were observed. The results of this study were obtained as follows. 1. The bending strength of zirconia was higher than that of alumina, and $5{\mu}m$ alumina had highest strength in variation of particle size of alumina. Except for $5{\mu}m$ alumina, increased with weight%, bending strength increased up to 80% and decreased at 90%. In case of glass infiltration, bending strength was slight higher than 80% and 90% of $5{\mu}m$ alumina. 2. Transmittance increased with increase of shrinkage, decrease of porosity, and with increase of filler size and had no direct correlation with weight%. 3. Thermal expansion coefficient of alumina group was $7.42\sim8.64\times10^{-6}/^{\circ}C$ and that of zirconia group was $9.83\sim12.11\times10^{-6}/^{\circ}C$ and the latter was higher than the former. 4. In x-ray diffraction analysis, alumina group and zirconia group increased $Al_2O_3$ peak and $t-ZrO_2$ peak with increase of weight%. The second phase(cristobalite peak) was observed in zirconia 40% group. 5. Porosity of zirconia was lower than that of alumina and $5{\mu}m$ alumina group had many pores with SEM. In case of low filler content, fracture occurred in glass and high filler content, in glass and filler. In case of aluminum addition to alumina, small oxidised aluminum was observed. 6. Zirconia group had high shrinkage than alumina group, and mixed group of alumina group had high shrinkage. In case of glass infiltration, shrinkage decreased and aluminum addition to alumina group was almost shrink-free.

Silicoating이 수지접합 수복물의 결합력에 미치는 영향에 관한 실험적 연구

신현수,한동후,이근우,Shin, Hyeon-Soo,Han, Dong-Hu,Lee, Keun-Woo,Lee, Ho-Yong 대한치과보철학회 1989 대한치과보철학회지 Vol.27 No.2

This study investigated the effects of Silicoating procedure on the tensile bond strength of resin-bonded prostheses. The Rexillium III specimens were treated with electrochemical etching and Silicoating procedure, followed by thermocycling and the NNB, Pors-on 4, and Degudent-U specimens were treated with Silicoating procedure. The specimens were debonded in tension with a Tensilon machine. Also, all specimens were observed with SEM, concentration of Si elements was analyzed with EPMA, and the mode of failure was recorded. The results of this study were obtained as follows: 1. In the Rexillium III specimens, the tensile bond strength of the Silicoated specimens was higher than that of the electrochemically etched specimens, and significant differences were observed (P<0.05). 2. The tensile bond strength of electrochemically etched Rexillium III specimens, significant differences were observed between the thermocycled and nonthermocycled specimens (P<0.05), but no significant differences were observed in the Silicoated specimens (P>0.05). 3. The tensile bond strength of the Silicoated specimens decreased NNB, Pors-on 4, Rexillium III, and Degudent-U in that order named. 4. Unlike the electrochemically etched specimens, the Silicoated specimens showed gap-free metal-resin interfaces with SEM. 5. Compared to the electrochemically etched specimens, the Silicoated specimens showed higher concentration of Si elements at the metal-resin interfaces and resin cement. 6. Photographic evaluation (X2) of the fractured sites revealed mainly cohesive failures with the Silicoated specimens, and adhesive failures with the electrochemically etched specimens.

이웃해 탐색 알고리즘 기반의 특수화물 팔레트 크기 최적화

신현수(Hyeon-Soo Shin),김창현(Chang-Hyeon Kim),하창완(Chang-Wan Ha),김환성(Hwan-Seong Kim) 한국항해항만학회 2023 한국항해항만학회 학술대회논문집 Vol.2023 No.1

팔레트는 낱개의 여러 화물을 동시에 묶어 운송할 수 있게 하는 하역 장비로써 원자재 조달에서부터 소비자에게 전달되기까지의 흐름을 통합적으로 연결하는 중요한 요소이다. 더불어 일관수송을 통한 비용 절감, 거래단위의 표준화, 운송수단의 효율적인 운영, 하역작업 개선을 목적으로 팔레트 표준화가 활발히 진행됨에 따라 T-11형, T-12형 등의 표준 팔레트가 우리나라 물류 산업 전반에 걸쳐 사용되고 있다. 그러나 대형·중량화물을 비롯한 특수화물의 경우, 크기 및 중량 등의 이유로 표준 팔레트에 적재하는 것이 불가능하기에 대부분 자체 팔레트를개발하여 사용하고 있다. 본 연구는 다양한 특수화물을 취급하는 팔레트의 크기를 결정하는 문제로써, 특수화물의 종류, 크기 및 중량, 보관 수량 등을 고려하여 최적 팔레트 크기를 산출하고자 한다. 이를 위해, 이웃해 탐색 알고리즘을 변형하여 전역 최적해를 찾을 수 있는 최적화 기법을 제안하였으며, 입력 데이터로서는 특수화물의 종류별 제원 및 보관 수량 정보, 제약조건 관련 정보가 사용되었다. 또한, 특정한 특수화물을대상으로 최적화 시뮬레이션을 수행하여 최적해 도출 여부를 확인함으로써 본 최적화 기법의 최적성을 검증하였다. The pallet, typically a form of tertiary packaging, is a flat structure used as a base for the unitization of goods in the supply chain. In addition, standard pallets such as T-11 and T-12 are used throughout the logistics industry to reduce the cost and enhance the efficiency of transportation. However, in the case of special cargo, it is impossible to handle such cargo using a standard pallet due to its size and weight, so many have developed and are now using their customized pallet. Therefore, this study suggests a pallet size optimization method to calculate the optimal pallet size, which minimizes the loss of space on a pallet. The main input features are the specifications and the storage quantity of each cargo, and the optimization method that has modified the Neighborhood Search Algorithm calculates the optimal pallet size. In order to verify the optimality of the developed algorithm, a comparative analysis has been conducted through simulation.

만성 활동성 간염을 동반한 Wilson병

신현수(Hyeon Soo Shin),한형원(Hyung Won Han),류형국(Hyung Kyg Ryu),김인환(In Hwan Kim),이일세(Il Se Lee),신영호(Young Ho Shin),이경민(Kyung Min Lee) 대한소화기학회 1995 대한소화기학회지 Vol.27 No.1

Wilsons disease is a rare inherited disease transmitted with an autosomal recessive trait and characterized by the excessive accumulation of copper in the body, principally in the liver and brain, but with involvement of kidneys, eyes, and skeletal system as well. We experienced a patient with Wilsons disease who showed chronic active hepatitis and cbaracteristic copper accumulation in liver parenchyme and abnormal laboratory finding, neurologic symptom, Kayser-Fleischer ring. Low copper diet and chelation of excess copper resulted in improvement of neurologic symptom in a few months. We report a case of Wilsons disease in male patient with review of literature. (Korean J Gastroenterol 1995;27:132-137)

공정사회를 이루기 위한 한국교회의 역할

신현수(Hyeon soo Shin) 개혁주의이론실천학회 2011 개혁주의 이론과 실천 Vol.- No.2

이 글은 오늘날 한국사회에서 뜨거운 논쟁점이 되고 있는 공정사회를 이루기 위해 한국교회가 어떠한 역할을 할 수 있는지를 논한다. 먼저 신학적으로 공정사회가 무엇이며 그것의 실현을 위한 기본 방향이 무엇인지를 밝힌다. 공정사회의 기본 성격은 하나님 나라의 본질에서 추론될 수 있다. 공정사회란 하나님 나라가 실현된 모습이기 때문이다. 공정사회는 정의로운 공동체이고, 하나님의 샬롬(평화)이 구체화 된 공동체며, 모든 사람이 하나님 형상으로 지음 받은 존재로서의 존엄성이 인정되는 공동체이고, 경제적 정의가 실현된 공동체이다. 이러한 공정사회를 이루기 위해서는 하나가 되는 공동체 정신을 함양하고, 사람이 갖는 기본권이 존중받는 사회 제도를 마련하며, 법질서를 굳건히 확립하고, 섬기고 나누는 것을 생활화하며, 사회 통합을 이루고, 경제적 정의를 실현하는 것이 요구된다. 한국교회가 공정사회를 이루기 위해 구체적인 역할을 하려면 무엇보다 먼저 사회 문제가 믿음을 실천하는 중요한 영역이라는 것을 받아들이는 것이 필요하다. 이러한 바탕 위에서 한국교회는 사회에 정의로운 공동체적 삶의 원리를 제시하고, 그러한 공동체를 이루기 위한 일에 적극 참여하며, 공정사회를 위한 제도적 장치를 마련하는 일에 힘을 기울여야 하고, 교회 스스로가 정의로운 공동체가 됨으로써 세상 사회에 본을 보이며, 나눔을 실천하는 일에 앞장서고, 공정사회를 이루기 위한 일에 비기독교인과 타종교인과도 적극 협력해야 한다. This article discusses what kind of roles the Korean church plays for building up a fairer society which is an issue seriously debated now in Korean society. It first pays attention to what is a theological concept of fair society. The basic character of fair society can be analogized from the essential nature of the Kingdom of God, for God's Kingdom is a reality of fair society. Fair society can be characterized as a community of justice, a community of a concrete reality of God's shalom, and community in which human dignity as bearer of imago Dei is accepted, and community in which economic justice is actualized. Next, it examines some directions for accomplishing such a fair society. The directions are suggested as follows: fostering community spirit, working out institutional devices in which human dignity is guaranteed, solidifying legal order, practising to serve and share, integrating diverse social ranks and groups, and realizing economic justice. There follows a consideration of the concrete and practical ways by which the Korean church contributes to the establishment of a fairer society. It is first acknowledged that the social realm is crucial for practising the Christian faith. Then, the followings are argued: providing the Korean society a principal of just and communal life, positively participating in realizing such a community, endeavoring to making institutional devices for fair society, becoming itself fair community thereby pioneering it, taking the initiative in sharing, and cooperating with non-Christians. Finally, the conclusion sums up the whole discussion and suggests a further constructive study of it.

셔틀랙 기반 물류센터의 레이아웃별 반출입 신뢰성에 관한 연구

이승필(Seung-Pil Lee),신현수(Hyeon-Soo Shin),김환성(Hwan-Seong Kim) 한국항해항만학회 2021 한국항해항만학회 학술대회논문집 Vol.2021 No.11

B형 만성활동성간염 환자에서 Prednisolone 단기 이탈 및 Alpha-Interferon 병합요법의 효과

김인환(In Hwan Kim),이일세(Il Se Lee),신현수(Hyeon Soo Shin),신영호(Young Ho Shin),김양식(Yang Sig Kim),김호규(Ho Gyu Kim),배효근(Hyo Keun Bae),김경환(Kyung Hwan Kim) 대한소화기학회 1997 대한소화기학회지 Vol.29 No.2

N/A Background/Aims: This study was conducted to investigate the effect of alpha-interferon after prednisolone withdrawa] therapy on chronic active hepatitis B with HBeAg. Methods: Twenty- three CAH patients were recruited at a general hospital in Pohang city from August 1990 to July 1991. Dose of 45mg, 30mg and 15mg of prednisolone were administered to patients for two weeks and two weeks pause, after that three million units of alpha-interferon 2b was injected once a day for the first week, and then the same dose was injected three times per week for eleven weeks. Patients were followed up for side effect and changes in serum ALT, HBsAg and HBsAb, HBeAg and HBeAb, HBV-DNA, DNA-polymerase and peripheral blood smear during and after treatment. Results: Seroconversion rate of twenty three HBeAg positives at 6 months after treatment was 61% and that of HBV-DNA positives was 48% and both seroconversions occurred in 39% of patients. The normalization rate of ALT was 61% after alpha-interferon therapy. However there were no patients who was become negative among HBsAg positives, Serum ALT decreased at four weeks after administering the alpha-interferon, and a continued decrease was obsered during therapy. However, a gradual increasing of ALT happened after finishing therapy and reached the average level of 79.6IU/L in the eighth week after theropy. The incidence of side effects after alpha-interferon therapy was not serious enough to withdraw therapy, They reported mild symptomes such as, anorexia(69.6%), myalgia(56.5%), fever(52.2%), fatigue(34.8%), arthralgia (26%), nausea(26%), mild hair loss(17.4%) and headache(13%). Conclusions: It was shown that alpha-interferon with prednisolone withdrawal therapy was effective in patients with CAH in terms of seroconversion of HBeAg and decreasing activity of HBV-DNA and normalization of ALT value.(Korean J Gastroenterol 1997; 29:199-206)

Propylthiouracil에 의한 감염 3예

한형원(Hyung Won Han),류형국(Hyung Kyg Ryu),김인환(In Hwan Kim),이일세(Il Se Lee),신영호(Young Ho Shin),신현수(Hyeon Soo Shin),이경민(Kyung Min Lee) 대한소화기학회 1995 대한소화기학회지 Vol.27 No.1

Although propylthiouracilis widely used for the treatment of hyperthyroidism, reports on hepatic injury by this drug are few. The clinical and histologic severity of propylthiouracil-induced hepatitis varies from mild to fulminant hepatic failure. Hypersensitivity is known as the principal pathophysiologic mechanism, but the precise mechanism remains obscure. Recently we e.perienced three cases of overt hepatitis induced by propylthiouracil therapy. Histologic e.amination was made in all three cases and revealed the features of subacute hepatic necrosis, centrilobular necrosis and chronic active hepatitis, respectively. All the patients recovered near completely after the discontinuation of propylthiouracil. Propylthiouracil rarely develops hepatic injury, but may induce severe hepatitis. Thus, monitoring of liver function test should be done in all patients who are receiving the drug due to thyrotoxicosis. (Korean J Gastroenterol 1995;27:125-131)

세침흡입술 및 조직생검으로 진단한 부신 골수지방종 1예

박재복,안기성,신현수,배정동,손호상,김이근,이영환,박미옥,장성국,이상채,정영식,황준호,양전호 대한내분비학회 1997 Endocrinology and metabolism Vol.12 No.1

Adrenal myelolipomas are rare, benign tumors cornposed of mature fat and bone marrow elements. Most are small, asymptomatic tumors found incidentally at postmortem examination, Fine needle aspiration biopsy can be used to confirm the diagnosis and avoid an unnecessary operation. We report a case of adrenal myelolipoma confirmed by fine needle aspiration biopsy. A 77-year-old woman with complaining of upper abdominal pain for 2 days was found to have an adrenal mass. She took dexamethasone frequently for 3 years due to multiple arthralgia. Ultrasono- graphy showed a 6cm-sized, suprarenal mass and a stone in the gall bladder with thickened wall. Computed tomography and magnetic resonance imaging scan also presented a suprarenal mass. Endocrinologic results were within normal limits. Adrenal myelolipoma was confirmed by computed tomography-guided fine needle aspiration biopsy without surgery. (J Kor Soc Endocrinol 12:105-110, 1997)

B형 만성활동성간염 환자에서 Prednisolone 단기 이탈 및 Alpha-Interferon 병합요법의 효과

김인환,이일세,신현수,신영호,김양식,김호규,배효근,김경환 大韓消化器病學會 1997 大韓消化器病學會誌 Vol.29 No.2