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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 Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in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.
만성 정신분열병 환자의 Clonidine에 대한 Growth Hormone의 반응
신영민,박수용,김용식 大韓神經精神醫學會 1989 신경정신의학 Vol.28 No.3
To investigate the functional state of noradrenergic system in chronic schizophrenia, clonidine(0.15㎎) was administered to chronic schizophrenic patients, and age and sex-matched normal controls. The mean increment of growth hormone(GH) of the patients after clonidine injection was not significantly different from that of controls. There was no significant correlation between the GH response to clonidine and duration of illness, duration of antipsychotic drug therapy, the last dose of antipsychotic drugs of clinical symptom scores of the patients. But those who showed blunted GH response had been medicated with significantly higher dose of antipsychotic drugs than the others, and there was significant positive correlation between positive symptom score and the dose of antipsychotic drugs. This result suggests that post synaptic α₂-adrenergic receptor in hypothalamus is hyposensitized by high dose of antipsychotic drugs. The relationship of positive symptoms of schizophrenia and GH response to clonidine is left undetermined.
관입시험법에 의한 콘크리트 압축강도 추정식의 제안에 관한 연구
신정식,이성용,권영웅 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)
This study concerns the new strength equation of concrete by penetration test. There are not only few estimate strength equations of concrete, but also many problems to apply them because of time, cost, easiness, structural damage, reliability and so on. For this study, there performed a series of test and proposed a equation as follows; fc = 1670 - 106d + 1.81d² here, fc : estimated compressive strength of concrete by kgf/cm² d : Probe exposed of concrete by mm.
응급실을 내원한 구강악안면외과 안면골 골절 환자의 변화에 대한 비교 연구
신상훈,성화식,강영훈,황대석,김용덕,김욱규,김종렬,정인교 부산대학교 병원 암연구소 2008 부산대병원학술지 Vol.- No.24
Although there have been many clinical studies about the facial trauma in the recent as well as in the past, severity and frequency of facial trauma are reported multifarious. It seemed to be because of variety of social, cultural, and environmental factors, and the view point of investigators. In this study, we investigated about the patients visiting emergency room during recent 4 years(2004-2007), and compared with retrospective study during former 10 years(1992-1996, 1999-2003) in Dept. OMS Pusan National University Hospital. We assessed the cause, type, demographic, etc, and analyzed alterations of facial bone fractures during past 3 periods. The results were as follows. The total number of patients was increased. 429 patients treated for maxillofacial fractures between January 1992 and December 1996, 466 patients treated between January 1992 and December 1996 and 764 patients treated between January 2004 and December 2007. The male-to-female ratio were 4.6:1, 3.9:1, and 4.16:1, respectively. Patient in the age groups of 10-19 years and 20-29 years increased in the latter two periods. Assaults and falls are decreased gradually, but slip down s are increased. Traffic accidents are still major cause of facial trauma. The mandibular fractures showed the highest incidence thorought three periods. Symphysis fractures of mandible was increased and condyle fractures of mandible was drecreased in the third period.
신영식 대구대학교 경제경영연구소 2003 경제경영연구 Vol.1 No.3
화폐수단에 의한 금융에 대치하여 생긴 실물형태의 임대차계약으로 오래전부터 리스거래는 리스거래 초기의 형태인 임대기간이 단기간인 단순한 리스는 특별한 회계처리상의 문제가 제기되지 않았으나 오늘날 대부분의 리스거래가 리스기간이 비교적 장기적이고 거의 내용연수에 달할때까지 리스하는 사실상 장기 할부 매출의 형태와 유사할 정도의 형태로 변해가는 상황에서는 기존의 임대차계약 형태의 회계처리방법으로는 적정한 회계정보를 제공하는데 문제가 있다. 이래서 제기된 문제가 리스거래의 자본화 문제이다. 리스거래의 자본화는 리스자산의 법적인 소유권은 리스기간 동안 리스회사가 가지고 있지만 리스자산의 실질적인 이용권은 장기간 리스이용자가 가지게 될 경우에 리스자산을 리스회사 또는 리스이용자 중 누구의 자산으로 계상하여야 하느냐 하는 문제이다. 리스자산을 자본화 할 것인가의 여부와 자본화를 한다면 어떠한 조건을 갖춘 경우에 자본화 할 것인가가 문제점으로 지적되면서 논쟁의 대상이 되고 있다. 우리나라를 비롯한 각국에서 어떠한 리스거래를 자본리스로 분류하고 어떠한 리스거래를 운용리스로 분류하여야 하느나에 관하여 많은 연구와 논쟁을 거쳐 현재는 우리나라는 물론 미국과 국제회계기준에서도 대체적으로 합리적인 분류기준을 마련하여 적정한 회계처리를 하고 있다. 그러나 아직까지도 우리나라의 합병회계준칙에는 예시에서 제시하지 않고 있지만 금융리스로 분류하기 위한 추가적인 조건의 고려, 금융리스로 분류하기 위한 엄격한 규정이 있기 때문에 리스산업의 위축, 규정상의 개념의 해석의 오류등의 연구하여야 할 과제가 지적되고 있다.