밤 생산 임가의 경영성과 향상을 위한 경영진단 연구

전준헌(Jun-Heon Jeon),원현규(Hyun-Kyu Won),유병일(Byoung-Il Yoo),이호승(Ho-Seung Lee),이숙향(Sook-Hyang Lee),한상열(Sang-Yoel Han) 한국산림휴양복지학회 2012 한국산림휴양학회지 Vol.16 No.4

뇌종양 환자의 제왕절개술을 위한 전신마취 : 증례 보고 A case report

이헌근,전세현,손주태,신일우,정영균 대한마취과학회 2002 Korean Journal of Anesthesiology Vol.43 No.4

A 28-year-old primigravida at 33 weeks gestation was referred to our hospital because of aggravation of seizures which occurred intermittently for the past 2 years. A brain magnetic resonance imaging scan taken at 33 weeks gestation showed a large brain tumor (7 × 5 × 4 cm) in the left high frontal lobe. She had a cesarean section under general anesthesia at 38 weeks and 1 day gestation. General anesthesia was induced with thiopental 250 mg, succinyleholine 75 mg and lidocaine 60 mg after a vecuronium 0.8 mg intravenous injection. The hyperventilation and mannitol used to reduce increased intracranial pressure (ICP) in this patient may be harmful and detrimental to the fetus before delivery. Achieving both ICP control and fetal well being at the same time during a cesarean section can be challenging to anesthesiologists. We report the anesthetic management of a cesarean section in a patient with a large brain tumor. (Korean J Anesthesiol 2002; 43: 515~519)

알칼리용액으로 처리된 폐피혁 분이 석고-피혁 복합체의 물성에 미치는 영향

조헌영,서정목,전기석,이기환 공주대학교 생산기술연구소 2001 論文集 Vol.9 No.-

Gypsum material has strong compressive strength and excellent resistance against fire. But, these material has some demerits ; weak water-resistance, heavy specific gravity and low physical properties in flexural and tensile strengths. While, leather shaving dust(LSD) which is much produced from leather manufacturing company in waste has strong tear and tensile strengths, the properties of the high hygroscopic and the superior thermal insulation. In this research, gypsum-leather composites were made with gypsum and LSD. And the physical properties of those were tested. The optimum dosage of LSD for gypsum-leather composite was decided to 1~5%(w/w) of the gypsum. In that case, the composit which has compressive strength: 147~272 kg_(f)/cm^(2), flexural strength: 66~87kg_(f)/cm^(2), specific gravity: 1.11~1.29 is made.

피혁 분으로 변성된 석고계 재료의 물성

조헌영,서정목,전기석,이기환 공주대학교 생산기술연구소 2000 論文集 Vol.8 No.-

Gypsum materials have strong mechanical strengths and great resistance to fire. Also these one are very cheap because of the gypsum is a byproduct from chemical plants. But, these materials have some demerits ; weak water-resistance, heavy specific gravity and low physical properties in bending and tensile strengths. While, leather shaving dust(LSD) is very much produced from leather manufacturing process. The LSD is composed of collagen fibers which is a kind of protein. This one has strong tear and tensile strengths because of the collagen fibers are cross linked during the tanning process of leather. Also the dust has the properties of the high hygroscopic and the superior thermal insulation, but is not degraded any more in neutral condition such as gypsum slurry. In this paper, we have reinforced the physical properties of gypsum with LSD as a filler. From this research, it is decided that the optimum dosage of LSD to gypsum is below 5%(w/w) of the gypsum, and the specific gravity of LSD-gypsum mixture is reduced to 30% relative to gypsum alone.

장벽경색이 선행한 Henoch-Schonlein 자반증 1례

한헌석,하태선,송형근,이상전,안묘순,박범수 충북대학교 의과대학 충북대학교 의학연구소 1993 忠北醫大學術誌 Vol.3 No.1

Henoch-Schonlein 자반증은 피부, 위장관, 관절, 신장 등을 주로 침범하며 소혈관염을 기본 병리 소견으로하는 전신성 혈관 장애 질환이다. 위장관계 증상으로는 복통, 오심 및 구토, 잠혈, 토혈, 흑색변 등이 있을 수 있고, 이러한 증상은 합병증 없이 회복되는 것이 보통이나 드물게는 장중첩증, 장벽경색 및 괴사, 장천공 등의 심한 합병증을 동반할 수도 있다. 이러한 위장관계 증상들은 특징적인 피부 소견에 선행하여 나타날 수도 있으며, 이때는 급성복증에 대한 감별진단이 중요하다. 저자들은 장벽경색이 선행하여 감별진단에 어려움을 겪고 시험적개복술을 시행한 이후에 특징적인 피부 자반이 발현되어 Henoch-Schonlein 자반증으로 진단할 수 있었던 증례를 경험하였기에 이를 보고하고자 한다. 본 증례는 입원 1일전부터 시작된 복통을 주소로 입원한 5세 남아가 배꼽 주위에 심한 경련성 복통을 지속적으로 호소하였고 이학적 소견상 배꼽주위의 압통, 장음의 감소, 흑색변 등이 있었으며 소장조영술상 공장 부위에 미만성의 불규칙한 점막비후 소견을 보여 제 8병일에 시험적개복술을 시행한 결과 근위 공장에 국한된 장괴사의 소견이 발견되어 절제 및 문합술을 실시 하였다. 병리학적 검사에서는 장벽경색의 소견을 보였다. 수술후에 복통은 완화되었으나 경미하게 지속되었고, 제 13병일경에 급성 부고환염이 병발되었다가 회복되었고 제 15병일경에는 하지에서부터 발현된 자반이 3일간 지속되었다. 결구 Henoch-Schonlein 자반증과 이의 합병증으로 발생한 근위 공장의 장벽경색으로 진단하였다. Colicky abdominal pain as symptom of Henoch-Schonlein purpura occurs in up to 70% of patients, and results from submucosal edema and hemorrhage. Abdominal pain and other GI symptoms such as nausea, vomiting, melena and hematemesis resolve mostly without any complications. But rarely life-threatening GI complications such as intussusception, intestinal mural infarction and necrosis, and massive hemorrhage may develope. In 14% of patients, abdominal pain may precede other symptoms, and creats diagnostic difficulties. We reports a case of the Henoch-Schonlein purpura presented with colicky abdominal pain which resulted from intestinal mural infarction and preceded characteristic purpuric skin lesion by several weeks. This 5 year old male patient complained of colicky abdominal pain, nausea and melena. Exploratory laparatomy was done and revealed intestinal mural infarction in proximal jejunum. One week later operation, purpuric skin lesion develiped in both leg and feet, and then, Henoch-Schonlein purpura was diagnosed.

일부 병원에서의 입원비 본인부담양상

신영전,유원섭,하헌영,정설희 한양대학교 의과대학 2000 한양의대 학술지 Vol.20 No.1

The purpose of this study was to estimate the proportion of user charges out of total treatment costs and to investigate the occuring status of the charge of non-benefit service. The data were collected from 6 hospitals in 3 cities (Seoul 2, Incheon 3, Shihung 1), which containing 1,752 discharge-bills of discharged patients insured by health insurance. The data were analyzed after standardization of the items of non-benefit services. The result are as follows; 1. the average percent of the cost-sharing of discharged patients was 38.1%(benefit : 15.5%, non-benefit : 22.6%) and the proportion of the cost-sharing due to non-benefit services was greater than that due to benefit services. 2. The occurrence rate and the occurred number of non-benefit services were different among hospitals and showed characteristic occurrence rate in individual hospitals. 3. In acute appendicitis, the characteristics of the occurrence rate and the occurred number of non-benefit services by individual hospitals was similar to those of hospitals. It suggest that the hospitals intentionally applied non-benefit item to patients in order to increase their profit. These findings suggest that the burden of cost-sharing is still high especially due to non-benefit services, so it is necessary to extend the coverage of insurance benefits and to develop management system for the appliance of non-benefit services. Regarding the discharge-bill, all service charges should be included in the bill.

교량감시를 위한 센서 네트워크 보안프로토콜

임화정,전진순,이헌길 강원대학교 산업기술연구소 2005 産業技術硏究 Vol.25 No.B

The wireless sensor network consists of a number of sensor nodes which have physical constraints. Each sensor node senses surrounding environments and sends the sensed information to Sink. The inherent vulnerability in security of the sensor nodes has promoted the needs for the light weight security protocol. In this paper, we propose a non-hierarchical sensor network and a security protocol that is suitable for monitoring the man-made objects such as bridges. Furthermore, we present the efficient way of setting the routing path by storing IDs, MAC(message authentication code) and the location information of the nodes, and taking advantage of the two node states, Sleep and Awake. This also will result in the reduced energy consuming rate.

A Dielectric Omnidirectional Near-infrared Reflector

Jeon, Heon-Su,Park, Yeon-Sang Optical Society of Korea 2002 Current Optics and Photonics Vol.6 No.3

We have studied both theoretically and experimentally an omnidirectional reflector operating at the wavelength region of 1.3 $\mu$m. The omnnidirectional reflector, a special case of one-dimensional photonic crystals, was prepared by alternately sputtering two dielectric materials, amorphous silicon and silicon dioxide. Measured reflectance spectra, very consistent with simulated results at all angles and polarizations, clearly showed the existence of an omnidirectional photonic bandgap.

Infinite families of elliptic curves over Dihedral quartic number fields

Jeon, Daeyeol,Kim, Chang Heon,Lee, Yoonjin Elsevier 2013 Journal of number theory Vol.133 No.1

<P><B>Abstract</B></P> <P>We find infinite families of elliptic curves over quartic number fields with torsion group Z / N Z with N = 20 , 24 . We prove that for each elliptic curve <SUB> E t </SUB> in the constructed families, the Galois group Gal ( L / Q ) is isomorphic to the Dihedral group <SUB> D 4 </SUB> of order 8 for the Galois closure <I>L</I> of <I>K</I> over Q , where <I>K</I> is the defining field of ( <SUB> E t </SUB> , <SUB> Q t </SUB> ) and <SUB> Q t </SUB> is a point of <SUB> E t </SUB> of order <I>N</I>. We also notice that the plane model for the modular curve <SUB> X 1 </SUB> ( 24 ) found in Jeon et al. (2011) [1] is in the optimal form, which was the missing case in Sutherlandʼs work (Sutherland, 2012 [12]).</P>

Preparation and Evaluation of Ketorolac Tromethamine Gel Containing Genipin for Periodontal Diseases

( Jeon Heon Yang ),( Mi Young Yun ),( Dae Keun Kim ),( Mi Jeong Kim ),( Young Il Kim ),( Tae Youl Kim ),( Kyu Ho Yang ),( Sang Chul Shin ) 전남대학교 약품개발연구소 2007 약품개발연구지 Vol.16 No.-