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낮은 상관 특성과 큰 선형 복잡도를 갖는 새로운 p-진 수열군
김영식(Young-Sik Kim),정정수(Jung-Soo Chung),노종선(Jong-Seon No),신동준(Dong-Joon Shin) 한국통신학회 2008 韓國通信學會論文誌 Vol.33 No.7C
최근에 홀수인 소수 p, n=4k, 그리고 d=((p<SUP>2k</SUP>+1)/2²에 대해서 Seo, Kim, No, Shin<SUP>[1]</SUP>이 m-sequence와 d로 decimation한 부분 수열들 사이의 상관 분포를 유도하였다. 하지만 이러한 상관 분포로부터 수열군이 자명하게 결정되지는 않는다. 본 논문에서는 우선 위의 상관 특성을 유지하는 수열군을 선택하는 방법을 제시한다. 더 나아가서 이 수열군과 동일한 상관 특성을 가지면서도 더 큰 선형 복잡도를 갖는 수열군을 새롭게 생성할 것이다. 끝으로 3진 수열의 선형 복잡도를 특정 경우에 대해서 유도하고 이 경우 원래의 수열군보다 더 큰 선형 복잡도를 가짐을 보일 것이다. For an odd prime p, n=4k, and d=((p<SUP>2k</SUP>+1)/2², Seo, Kim, No, and Shin<SUP>[1]</SUP> derived the correlation distribution of p-ary m-sequence of period pⁿ-1 and its decimated sequences by d. In this paper, two new families of p-ary sequences with family size p<SUP>2k</SUP> and maximum correlation magnitude 2√pⁿ-1 are constructed. The linear complexity of new p-ary sequences in the families are derived in the some cases and the upper and lower bounds of their linear complexity for general cases are presented.
야뇨증 환아들의 심리사회적 특성에 대한 다기관 연구 : 행동 및 정서 문제를 중심으로
조수철,김재원,신민섭,황준원,한상원,박관현,이상돈,김경도,김건석,서홍진,이유식,정재용,김영균,문두건,남궁미경,한창희,조원열,김영식,배기수,이종국,정우영,신의진 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6
Objectives : The aim of this study was to examine the behavioral and emotional problems associated with nocturnal enuresis in Korean children. Methods : Three hundred eighteen children with nocturnal enuresis, together with their parents, completed the Child Behavior Checklist (CBCL), Disruptive Behavior Disorder Scale according to DSM-IV (DBDS), Children's Depression Inventory (CDI), State-Trait Anxiety Inventory for Children (STAIC), and Piers-Harris Children's Self-Concept Scale (PHCSC). Ninety-three normal students were selected as the control group. Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in the nocturnal enuresis group according to the CBCL results. The nocturnal enuresis group also scored significantly higher in the ADHD and ODD profiles of the DBDS. The nocturnal enuresis group was more depressed and anxious than the control group according to the results of the CDI and STAI. The mean score of the PHCSC was significantly lower in the nocturnal enuresis group when compared to the normal control group. Conclusion : The results of this study suggest that children with nocturnal enuresis in Korea have clinically relevant behavioral and emotional problems. The findings support the link between nocturnal enuresis and psychopathology in Korean children.
박영신,남영식,정상영,최재호,장기혁,박원호,Park, Young-Shin,Nam, Young-Sik,Jung, Sang-Young,Choi, Jae-Ho,Jang, Ki-Hyuk,Park, Won-Ho 한국섬유공학회 2012 한국섬유공학회지 Vol.49 No.1
In this work, effects of total draw ratio change on the mechanical properties of polyester fibers were studied. The process parameter was a total draw ratio and the draw ratios that were used ranged from 6.6 to 7.0. Tensile properties are determined from the tensile tester, and crystallite parameters from the density measurement and X-ray diffraction were discussed with the different total draw ratios. The tenacity, young's modulus and crystallinity were increased to 10.6 g/d, 123.2 g/d and 42.1%, respectively, with increase in the total draw ratio. The relations between total draw ratio and mechanical properties of high tenacity polyester fiber were discussed.
古代의 韓ㆍ中ㆍ日 醫藥交流 : 「일본서기」를 중심으로 indicated in 「Ilbonseogi」
신순식,최환수,양영준,홍원식 한국한의학연구원 1996 한국한의학연구원논문집 Vol.2 No.1
『Ilbonseogi』(edited A.D.720) was studied to investigate the medical and pharmaceutical exchange among ancient Korea, China and Japan. It seemed that Korean and Chinese traditional medicine was introduced to Japan through Korea. It was also shown in 『Ilbonseogi』 that Koreans who lived in China and Japan during that time seemed to have active medical idea exchange. From various facts indicated in 『Ilbonseogi』, it was believed that Korean and Chinese traditional medicine was the basis for the foundation of Japanese traditional medicine.
신유식,이윤환,서종수,전영흥,정효민,정한식 경상대학교 해양산업연구소 2002 해양산업연구소보 Vol.15 No.-
The purpose of this research is to obtain the characteristics of heat transfer or heat exchange under the vacuum pressure. The general heat transfer or heat exchange can be changed with the experimental environment. In this report, the exothermic calorie and endothermic calorie were measured under the vacuum chamber. These two kinds of calories show the evaporative and condensing sides, respectively, and these calories were measured by using the parameter with flow rate.
Ornthine-aspartate의 용해도 및 Drowning-out 결정화 연구
신동명,김우식,김용욱 경희대학교 산학협력기술연구원 1997 산학협력기술연구논문집 Vol.3 No.-
오르니틴-아스파테이트의 용해도와 drowning-out결정화에 관한 연구를 수행하였다. 오르니틴-아스파테이트 용액에 알코올을 첨가하면 오르니틴-아스파테이트의 용해도가 극적으로 감소하며, 결과적으로 오르니틴-아스파테이트의 침전이 일어난다. 오르니틴-아스파테이트 침전공정에서 오르니틴-아스파테이트의 회수율과 결정크기는 주입속도, 교반속도 및 주입방식에 크게 영향을 받았다. 또한, 물과 알코올의 혼합액에서 오르니틴-아스파테이트의 용해도는 알코올 분율이 증가함에 따라 감소하는 것으로 나타났다. 알코올-물 혼합용액에서 오르니틴-아스파테이트의 용해도는 Cohn식과 Wilson식들에 의해 성공적으로 예측될 수 있다. Study on solubility and drowning-out crystallization of ornithine-aspartate was carried out. Addition of alcohol to ornithine-aspartate solution reduces dramatically the solubility of ornithine-aspartate and results in the precipitation of ornithine-aspartate. In the process of ornithine-aspartate precipitation the recovery and crystal size of the ornithine-aspartate were significantly affected by the feeding rate , agitation rate and feeding mode. In water and alcohol mixture, the solubility of ornithirne-aspartate was also presented to be reduced as increasing alcohol fraction. The solubility of ornithine-aspartate in solution of alcohol-water mixture can be successfully predicted by Cohn and Wilson equations.