성능개량 항공기의 DIRCM 관련 기만성공률 시험횟수 산출연구

안인철,박수연,이병헌,허장욱 한국산학기술학회 2025 한국산학기술학회논문지 Vol.26 No.10

특수작전용 항공기의 기존 생존장비는 플레어나 채프와 같은 수동적 기만체계에 의존하고 있어 정밀화된 위협 환경에서의 대응에 한계를 보이고 있다. 이러한 한계를 극복하기 위해 능동적 방어체계인 DIRCM(Directional Infra-Red Counter-Measures)의 도입 필요성이 증대되고 있으며, 특히 성능개량 항공기에 적용할 경우 그 효과성 검증이 필수적이다. 본 연구는 미 해군의 TADIRCM(Tactical Aircraft DIRCM) 등 유사 무기체계의 사례를 분석하고, 통계적 검정력 분석 기법을 활용하여 DIRCM의 기만성공률을 95% 신뢰수준에서 효과적으로 평가할 수 있는 시험횟수 산출 방안을 제시하였다. 분석 결과, TADIRCM의 경우 MWS(Missile Warning System)는 96%의 유효 교전에서 위협을 즉시 탐지하였고, 탐지 이후 DIRCM은 99%의 확률로 기만에 성공하여 전체적으로 95% 이상의 성능을 나타냈다. 유도무기 실사격 시험에서는 명중률이 84.6%에서 100.0%로 확인되었으며, DIRCM의 성능 검증을 위해서는 4개 방위각(0°, 90°, 180°, 270°)과 3개 고각(10°, 20°, 35°) 조건에서 최소 25회 이상의 시험이 요구됨을 도출하였다. 본 연구는 통계적으로 타당한 시험 설계 기준을 제시함으로써 DIRCM의 신뢰성 있는 성능 평가를 가능하게 하며, 향후 특수작전용 항공기의 생존성 향상과 운용 효과 극대화에 기여할 수 있을 것으로 기대된다.

성능개량 항공기의 DIRCM 관련 지상시험 방안 연구

안인철,정윤아,허장욱 한국산학기술학회 2025 한국산학기술학회논문지 Vol.26 No.8

Special operations aircraft operate primarily at low altitudes and speeds to infiltrate hostile areas and deploy personnel and material covertly. Given this operational framework, integrating advanced defensive systems like Directional Infrared Countermeasures (DIRCM) is essential for survivability. The Republic of Korea Armed Forces operates aircraft with limited survivability systems against enemy air defense threats. In response, the Agency for Defense Development (ADD) developed an indigenous DIRCM system in 2018. DIRCM integration requires a rigorous test and evaluation (T&E) process, with ground testing as the most critical phase. This includes a Line Replaceable Unit (LRU) performance validation, system integration, functional verification, and interoperability testing. Robust control measures, clear task assignments, and structured procedures must be established. Extensive environmental qualification testing should be conducted to improve extreme temperature flight tests. In addition, laser biohazard assessments from ground-based threat simulators must be incorporated. This study presents a comprehensive DIRCM ground test framework addressing these considerations.

성능개량 항공기의 생존장비 통합 관련 비행시험 방안 연구

안인철,박희범,이병헌,허장욱 한국산학기술학회 2025 한국산학기술학회논문지 Vol.26 No.9

With the development of components for the DIRCM (Directional Infrared Countermeasures) aimed at enhancing the survivability of the special operations aircraft of the Republic of Korea's military, it has become essential to conduct system-wide performance verification. Hence, integrated flight tests incorporating DIRCM and other survivability equipment must be performed to assess interoperability in real operational environments. In particular, verifying whether the functions validated through ground tests operate reliably under flight conditions is crucial for preventing potential operational issues. This study evaluated the operational suitability of aircraft by considering the key elements of flight testing and analyzed the distance parameters for both ground and flight tests to simulate the characteristics of parachutes and MANPADS (Man-Portable Air Defense Systems) threat environments. In addition, an efficient testing approach was developed by establishing various defensive strategies centered around threat aircraft. The key verification elements in flight tests include ASE (Aircraft Survival Equipment)'s operational range, response speed, detection bandwidth, and operational coverage. Furthermore, a comprehensive evaluation methodology is presented by incorporating test procedures for validating the interoperability of NVIS (Night Vision Imaging System), DIRCM/MAWS (Missile Approach Warning System) functionalities, CMDS (Countermeasure Dispensary System), and EWC (Electronic Warfare Control) integration.

성능개량 항공기의 DIRCM 관련 지상시험 방안 연구

안인철(In-cheol Ahn),정윤아(Yun-ah Jeong),허장욱(Jang-wook Hur) 한국산학기술학회 2025 한국산학기술학회논문지 Vol.26 No.8

Special operations aircraft operate primarily at low altitudes and speeds to infiltrate hostile areas and deploy personnel and material covertly. Given this operational framework, integrating advanced defensive systems like Directional Infrared Countermeasures (DIRCM) is essential for survivability. The Republic of Korea Armed Forces operates aircraft with limited survivability systems against enemy air defense threats. In response, the Agency for Defense Development (ADD) developed an indigenous DIRCM system in 2018. DIRCM integration requires a rigorous test and evaluation (T&E) process, with ground testing as the most critical phase. This includes a Line Replaceable Unit (LRU) performance validation, system integration, functional verification, and interoperability testing. Robust control measures, clear task assignments, and structured procedures must be established. Extensive environmental qualification testing should be conducted to improve extreme temperature flight tests. In addition, laser biohazard assessments from ground-based threat simulators must be incorporated. This study presents a comprehensive DIRCM ground test framework addressing these considerations.

Floppy Infant에 관한 연구

이건수,안인철 충남대학교 의과대학 지역사회의학연구소 1999 충남의대잡지 Vol.26 No.1

16 cases with floppy infant syndrome were observed at the department of Pediatrics at Chungnam National University Hospital during a period of ll years from January, 1986 to December, 1996. The results were as follows: 1. The incidences of disease were Werdnig-Hoffman disease(W-H-D, 7 cases), Guillain-Barre syndrome(GBS, 3 cases), congenital muscular dystrophy(2 case), congenital myasthenia gravis (2 cases), congenital myotonic dystrophy(1 case) and neonatal myasthenia gravis(1 case) in order of frequency. 2. The sex ratio of male to female was 1.3 : 1. 3. The main symptoms and signs were decreased muscle tone(93.8%), decreased tendon reflex (75%), dysphagia(75%), respiratory distress(75%), abnormal traction response(68.8%), abnormal vertical response(68.8%), weak crying(62.5%), poor head control(62.5%), frog leg posture(62.5%) and fasciculation(31.3%) in order of frequency. 4. The EMG findings of W-H-D and GBS were increased amplitude and duration. The EMG findings of congenital muscular dystrophy and congenital myasthenia gravis were reduced amplitude and duration. The EMG findings of congenital myotonic dystrophy and neonatal myasthenia gravis were normal. 5. The ceatine kinase(CK) levels of W-H-D, GBS, congenital myasthenia gravis and neonatal myasthenia gravis were normal. The CK levels of congenital muscular dystrphy and congenital myotonic dystropohy were increased.

심초음파를 이용한 태아심장 기형의 평가

진병로,안인철,이윤이,길홍량 충남대학교 의과대학 지역사회의학연구소 1999 충남의대잡지 Vol.26 No.1

Congenital heart disease is the most common congenital malformation and its incidence is 8/1000 live birth, and contributes to significant perinatal morbidities and mortalities. With the advancement of echocardiogrphic equipment and technique, it is enable to detect the heart anomalies in utero. We performed 94 fetal (93 mothers) echocardiographic examinaton. 10 confirmed and 3 unconfirmed cardiac anomalies were identified. The common cardiac anomalies were ventricular septal defect(4), tetralogy of Fallot(2), and tricuspid valve regurgitation(2). The common indications of fetal echocardiography were as follows: family history of congenital heart disease(26), suspection by obstericians(24), fetal arrhythmia(13), and other organ anomaly(7). But the relative yield of indication were; suspected by obstericians 33.3%, other organ anomaly 14.3%, family history of congenital heart disease 7.6%, and fetal arrhythmia 7.6%. The false positive result was only 1 case of ventricular septal defect, which was normal in postnatal examination. The mean maternal age was 27years 5months in confirmed cases and 25years 5month s in unconfirmed cases. The fetal echocardiographic study for cardiac anomalies is reliable and accurate method in selected indicated groups, but systematic approach for screening method and identified cardiac anomalies would be needed.

바이러스성 수막염에서 뇌척수액 IL-6의 임상적 의의

주은주,안인철,이재호 대한소아청소년과학회 2000 Clinical and Experimental Pediatrics (CEP) Vol.43 No.4

Purpose : Cytokines found at a inflammatory site may be a good indicator of clinical severity of an infectious inflammatory disease. We assayed interleukin 6(IL-6) concentrations in cerebrospinal fluid(CSF) from patients affected with viral meningitis, and verified the relationship between IL-6 and inflammatory parameters and whether IL-6 can be used as a diagnostic marker in the diagnosis of viral meningitis. Methods : We measured CSF IL-6 concentration in viral meningitis(30 cases) and healthy children(3 cases) by using ELISA, and also measured serum and cerebral spinal fluid(CSF) chemistry and inflammatory markers, including C-reactive protein(CRP). We compared the data and analyzed the relationship between the results. Results : The CSF IL-6 levels of viral meningitis(520.1■384.3pg/dL) were significantly higher than that of normal control(2.3■4.0pg/dL)(P<0.05). The relationship between CSF IL-6 level and serum CRP was significant(P=0.0041). The relationship between CSF protein level and CSF IL-6 level was significant(P=0.001). There was no significant correlation between CSF IL-6 level and CSF WBC count. Conclusion : According to these results, we concluded that viral meningitis is highly associated with CSF IL-6, and we predict CSF IL-6 is useful in the diagnosis and prediction of treatment for viral meningitis. 목 적 : 바이러스성 수막염 환아의 척수액에서 IL-6 농도와 세포수, 당 및 단백질 농도와 혈청 CRP를 측정하여 IL-6와 기타 검사결과들과의 상관관계를 조사 연구함으로써 바이러스성 수막염에서 나타나는 IL-6의 임상적 의미를 규명하고자 본 연구를 실시하였다.방 법 : 바이러스성 수막염으로 입원하였던 환아 30례를 대상으로 내원시 혈청과 척수액을 동시에 채취하여 뇌척수액의 세포수, 당, 단백질 검사와 혈청 CRP 를 측정하였으며 뇌척수액의 IL-6는 척수액을 채취한 후 영하 70도에 보관하였다가 ELISA방법으로 측정하였다.

신경세포 이주장애에 관한 연구

이건수,안인철 충남대학교 의과대학 지역사회의학연구소 1999 충남의대잡지 Vol.26 No.1

25 cases under 15 years of age with neuronal migration disorders were observed at the department of Pediatrics at Chungnam National University Hospital during a period of 6 years from January, 1992 to December, 1997. The results were as follows: 1. The peak incidence of age was 5 to 10 years(40.3%). The sex ratio of male to female was 1.8 : 1. 2. The types of neuronal migration disorders were cortical dysplasia (36%), lissencephaly(28%), schizencephaly(16%), heterotopia(12%) and megalencephaly(8%) in order of frequency. 3. The clinical findings were seizure(76%), delayed development(48%), delayed speech(32%), mental retardation(24%) and motor deficit(20%) in order of frequency. 4. The locations of disorder were frontal lobe(72%), parietal lobe(60%), temporal lobe(40%) and occipital Iobe(32%) in order of frequency. 5. The abnormal EEG findings were 17 cases(68%). Among these cases, focal abnormalities were 5 cases(29.4%), general abnormalities were 11 cases(64.7%) and abnormal background was 1 case(5.9%). 6. The seizure types were generalized seizure(63.2%), partial seizure (31.6%) and mixed seizure (5.3%) in order of frequency. 7. The patients with larger size of lesions had more delayed development, delayed speech and mental retardation.

가와사끼병에서 감마글로불린 치료 용량(1g/kg 단일요법과 2g/kg 단일요법)의 비교

인수미,안인철,길홍량,정용현 대한소아청소년과학회 2000 Clinical and Experimental Pediatrics (CEP) Vol.43 No.7

목 적 : 가와사끼병에서 아스피린과 IVGG 병용투여가 가장 효과적인 방법으로 알려져 있으나 IVGG의 적절한 용량 및 용법 등이 여전히 논란의 여지가 많다. 이에 저자들은 기존의 IVGG 2g/kg 단일요법과 비교하여 IVGG 1g/kg 단일요법의 임상적 적용과 치료효과에 대하여 알아보고자 하였다.방 법 : 1996년 2월부터 1999년 1월까지 충남대학교병원 소아과에 입원한 가와사끼병 환아중 고위험군(Harada 점수 4점 이상)을 대상(63명)으로 IVGG 1g/ kg 1회 A군(32명), 2g/kg 1회 B군(31명)으로 나누어 IVGG 치료 전, 후의 임상경과, 검사 소견 및 심혈관 합병증을 비교 분석하였다. Purpose : Treatment of Kawasaki disease with intravenous gamma globulin(IVGG), together with aspirin, has been demonstrated to be safe and effective in preventing coronary artery lesion and systemic inflammation, but optimal IVGG dosage and administration method are still controversial. We compared the therapeutic efficacy and clinical response of single IVGG 1g/kg to that of IVGG 2g/kg for comparable risk group of Kawasaki disease. Methods : We conducted a prospective study involving 63 children with Kawasaki disease requiring IVGG treatment(Harada score■4) at Chungnam National University Hospital from February 1996 to January 1999. The children were assigned to receive IVGG either as a single infusion of 1g/kg(A group, 32 person) or 2g/kg(B group, 31 person) and aspirn(100mg/kg/day through acute phase, then 3 to 5mg/kg/day for 8 weeks of duration). Results : There were no significant difference between the two groups according to clinical and laboratry data, including coronary artery lesions(group A, 31.3% and group B, 29.0%) before treatment. After IVGG treatment ratio of complication with coronary artery lesion(group A 1/32=3.1% and group B, 2/31=6.5%) and that of retreatment(group A, 4/32=12.5%, group B, 2/31=6.5%), duration of fever(group A, 1.3■1.6 days and group B, 0.7■1.4 days), hospital stay(group A, 7.0■1.4 days and group B, 6.5■2.0 days), laboratory finding and side effects of IVGG were not significantly different(P>0.05). The total dosage of IVGG was significantly lower in group A than group B(group A, 1.16■0.37g/kg, 375,421■207,351 ￦ and group B, 2.10■0.40g/kg, 641,498■274,750 ￦(P<0.05). Conclusion : The therapeutic efficacy and clinical response of single 1g/kg therapy are comparable to that of single 2g/kg therapy.

간질 환아의 혈청 지질에 관한 연구

이건수,안인철 충남대학교 의과대학 지역사회의학연구소 1999 충남의대잡지 Vol.26 No.2

Purpose : To assess the changes of treatment of phenobarbital, carbamazepine, valproic acid and polytherapy on serum lipids in epileptic children. Method : We determined serum levels of total cholesterol(TC), high-density lipoprotein cholesterol(HDL-C), low-density lipoprotein cholesterol(LDL-C), and triglycerides in 50 healthy children and in 80 children with epilepsy who had been receiving phenobarbital(9 patients), carbamazepine(20 patients), valproic acid(30 patients), or polytherapy (21 patients) Results : In the group receiving phenobarbital, mean TC, HDL-C and LDL-C levels were significantly higher than in the control group. In the group receiving carbamazepine, mean TC levels were significantly higher than in the control group. In the group receiving valproic acid, mean triglyceride and HDL-C levels were significantly lower than in the control group, but mean LDL-C/HDL-C ratio were significantly higher than in the control group. In the group receiving polytherapy, mean TC and LDL-C levels were significantly higher than in the control group. In neither group did mean TG/HDL-C ratio differs significantly from the corresponding control groups. Conclusion : Our results suggest long-term treatment of anticonvulsants significantly modify serum lipids in epileptic children.