압축공기 방식 수중발사 시스템의 동특성 시뮬레이션

박인기,Park In-Ki 한국군사과학기술학회 2004 한국군사과학기술학회지 Vol.7 No.2

In this paper, simulations of the underwater discharge system with compressed air are performed to predict dynamic characteristics of the system and to find optimal opening trajectories of the expulsion valve. Major components of the system are defined and their governing equations are derived to make up the mathematical model. The compressed air discharge method is affected largely by the discharge depth, and therefore the opening trajectories according to the discharge depth should be found to satisfy the demands of discharge performances. Simulation results are compared with experimental data to confirm the validity of the system model.

아메바 모양의 침착물을 동반한 독성 전방 증후군에서 야그레이저를 이용한 치료

박인기,김재훈,김재찬,전연숙.In Ki Park. MD. PhD. Jae Hoon Kim. MD. Jae Chan Kim. MD. PhD. Yeoun Sook Chun. MD. PhD 대한안과학회 2012 대한안과학회지 Vol.53 No.9

Purpose: To report 3 unusual cases of toxic anterior segment syndrome resembling transparent amoeboid deposits following cataract surgery and to determine effective treatment methods. Case summary: Three patients underwent uneventful phacoemulsification with implantation of a hydrophobic acrylic intraocular lens (IOL) and patching with antibiotic/steroid ointment at the end of surgery. At a mean of 15 days postoperatively, a significant number of anterior chamber inflammatory cells and multiple transparent amoeboid deposits with central, elevated, gray-white opaque material on the anterior surface of the IOL were observed. In two cases, greasy material coated the anterior surface of the IOL in a wavy pattern. All laboratory tests to exclude infectious endophthalmitis were negative. Presuming postoperative inflammation, intensive topical steroid was administered. After treatment, anterior chamber reactions decreased; however, the multiple whitish deposits remained. Subsequently, a Nd:YAG laser (0.8 mJ) was used to disrupt and remove the precipitates. The masses were easily and obviously removed by laser therapy, and the mild residual inflammation resolved satisfactorily with mild topical steroid treatment. No recurrence or related complications developed during the two-year follow-up period in any patients. Conclusions: The delayed postoperative inflammation onset resembling amoeboid deposits is thought to be caused by ingress of ointment into the eye. The specific lumpy deposits cannot be controlled with topical steroids, although Nd:YAG laser treatment can effectively remove inflammatory cell deposits mingled with greasy oil material. J Korean Ophthalmol Soc 2012;53(9):1334-1340

歸脾湯 및 歸脾湯加味方의 止血效果에 관한 實驗的 硏究

박인기,김경준,Park, In-ki,Kim, Kyung-jun 대한한방안이비인후피부과학회 2003 한방안이비인후피부과학회지 Vol.16 No.1

This Experiment was conducted to investigate the hemostatic effects of Guipitang and Guipitangjiaweifang. For this purpose, the effects of the crude extracts on the platelet count. prothrombin time, fibrinogen level and partial prothromboplastin time were estimated. The rats were divided into normal group, control group and experimental group. Control group was administrated normal saline and experimental group was divided into Sample 1 (Guipitang) and Sample 2 (Guipitangjiaweifang). The results obtained were as follows : 1. The platelet count was significantly increased in both of two samples as compared with the control group. 2. The prothrombin time was significantly shortened in case of Sample 2. however there were no significant changes in case of Sample 1 as compared with the control group. 3. The fibrinogen level was significantly increased in case of Sample 1. however there were no meaningful changes in case of Sample 2 as compared with the control group. 4. The partial prothromboplastin time was significantly shortened in both of two samples as compared with the control group. According to above results. it is supposed that Guipitang and Guipitangjiaweifang have the hemostatic effects in experimental animals.

시신경을 침범한 밀러피셔증후군

박인기,문상웅,한지상,신재호,In Ki Park,Sang Woong Moon,Ji Sang Han,Jae Ho Shin 대한안과학회 2010 대한안과학회지 Vol.51 No.12

Purpose: To report an extremely rare case of optic nerve involvement in Miller-Fisher syndrome. Case Summary: A 74-year-old woman presented to our clinic with decreased visual acuity in both eyes. Such symptoms started 1 month prior to her visit, after sudden onset of left-side motor power weakness and dysphasia. Following the initial symptoms, our patient consecutively experienced worsening dysphagia, ptosis, and lateral gaze limitation. We confirmed the diagnosis as Miller Fischer syndrome with a positive anti-GQ1b antibody serology. She received immunoglobulin treatment for 5 days in other departement. She visited our clinic due to continuing diplopia, decrease of visual acuity and gait disturbance. On initial examination, the corrected visual acuity was 0.5 in both eyes. Ptosis of both eyelids, esodeviation, limitation in ocular movement was noted. The fundoscopic examinations revealed relatively pale optic disc. There was decrease in color vision in both eyes. The visual evoked potential test showed low amplitude and delayed latency in P100 wave in both eyes. Two months after her initial visit to our department her symptoms started to improve, and after 4 months all the initial problems resolved completely and her corrected visual acuity checked out to be 0.8 in both eyes and VEP abnormality was recovered. Conclusions: It is extremely uncommon for Miller Fisher syndrome to involve the optic nerve. We present such a case of a 74-year-old woman whose symptoms improved 4 months after its first attack with treatment. J Korean Ophthalmol Soc 2010;51(12):1676-1680

A-TIG 용접에서 용입 형상비에 미치는 아크길이와 실드가스의 영향

박인기,함효식,조상명,Park, In-Ki,Ham, Hyo-Sik,Cho, Sang-Myung 대한용접접합학회 2008 대한용접·접합학회지 Vol.26 No.6

TIG welding enables to produce high quality weldment. However it has some problems such as shallow penetration and large distortion due to low penetration aspect ratio after welding. In order to overcome those problems, there are many ongoing studies on A-TIG welding, which use active flux. In this study, the effect of arc length and shield gas on penetration aspect ratio with melt-run welding on STS 304 6t, on which active flux was spreaded, was investigated. Arc length was changed from 1mm to 3mm, and aspect ratio became higher as arc length was decreased in this range. 100% Ar gas, Ar-$H_2$ mixed gas, Ar-He mixed gas, and 100% He gas were used as shield gas in this study. When Ar-$H_2$ mixed gas, Ar-He mixed gas, and 100% He gas were applied, penetration and melting efficiency were both increased as compared with 100% Ar gas. Aspect ratio was the highest with Ar-2.5% $H_2$ mixed gas.

선형펌프 방식 수중발사 시스템의 동특성 해석

박인기,정찬희,Park, In-Ki,Jung, Chan-Hee 한국군사과학기술학회 2005 한국군사과학기술학회지 Vol.8 No.3

In this paper, the mathematical model of the underwater discharge system using a linear pump is derived and the suitable opening pattern of a flow control valve which satisfies the discharge performance requirements is obtained through the underwater discharge simulations. The simulation results show that the dynamic characteristics of a projectile are greatly affected by the opening pattern of the flow control valve, however, hardly by the diving depth. It is anticipated that the simulation model can be used to derive the design parameters and analyze the performance of the designed underwater discharge system using a linear pump.

티트리오일을 이용한 유아 눈꺼풀 사면발이증 치료 1예

박인기,구현,전연숙,In Ki Park,Hyun Koo,Yeoun Sook Chun 대한안과학회 2011 대한안과학회지 Vol.52 No.10

Purpose: The authors of the present study report a case of phthiriasis palpebrarum treated with petrolatum ointment and tea tree oil in a 12-month-old boy. Case summary: A bluish-gray macule and blood clots were found on the central portion of the upper eyelid of a boy who had rubbed his eyelid vigorously 1 week prior. Several 0.5 mm sized brownish-gray nits and 1.6 mm sized lice on the eyelashes were visible and was diagnosed with phthiriasis palpebrarum after light microscopic examination. The nits and lice were gently removed mechanically with the help of a white petrolatum ointment (Vaseline) and the eyelashes were cleaned with 50% tea tree oil. Nits and lice were successfully eradicated without recurrence 10 days after daily treatment with petrolatum ointment and 10% tea tree oil eyelash cleansing. J Korean Ophthalmol Soc 2011;52(10):1222-1226

생태주의적 아동용 그림책 일러스트레이션의 감성교육 기능에 관한 고찰

박인기 ( In Ki Park ) 한국기초조형학회 2011 기초조형학연구 Vol.12 No.5

아동 성장기의 시지각적 경험은 성인이 되어가는 성장과정에 있어 매우 중요한 정서적 의미를 갖는다. 심리적인 조화와 균형을 이루는 정서적 안정 속에서 점차 지적인 사고능력이 형성되고, 특히 ``밈(Meme)``의 작용에 의한 모방적인 문화현상은 곧 사회성의 발달과정으로 이어지기 때문이다. 따라서 미취학 아동을 주 대상으로 하는 그림책에 있어 일러스트레이션의 형식과 내용 등 독창성, 그리고 형태와 색채 등 기초조형성은 취학아동과 청소년을 대상으로 하는 기술적 관점과는 달리 본질적인 이유에서 감성적 예술성이 더욱 검토되어야 한다. 유아기를 포함한 미취학 아동기에 있어 시지각의 경험은 직관적인 조형형태로, 구조적인 조형형태로, 그리고 주관적인 정감의 조형형태로 인식된다. 감각기관을 통해 수용된 감각다발은 선택과 종합을 통해 비로소 의식세계로 지각되며 직관은 또 다른 상상력을 낳고 개념화되면서 정서와 지식을 형성하기 때문이다. 인간의 생명현상은 의식의 집중도와 물질의 합성도에 의해 통합된 하나의 진화현상이다. 이러한 관점에서 보면 아동으로서의 인간존재 모습은 물질과 정신문제의 조화와 균형을 이룬 질서현상이라고 할 수 있는 것이다. 이러한 조화와 질서의 현상, 곧 인간현상은 음양의 법칙, 동정의 법칙, 순환반복하는 자연법칙으로써 스스로 생성소멸하는 자연현상과 변화생성하는 우주현상과도 연결된다. 인간을 소우주로 부르는 이유가 여기에 있다. 본 연구는 조화와 질서의 인과현상, 즉 인간현상으로서 아동기의 시지각적 인식의 특성을 알아보고 그에 알맞는 생태주의적 아동용 그림책 일러스트레이션의 교육적 기능을 중심으로 감성적 성장, 지적성장 그리고 정서적 성장과 상상력의 발달에 미치는 영향을 논구하였다. Visual conceptual experiences of children during growth period have a significant meaning in emotional development. The emotional significance of visual conceptual experiences is related to the intellectual capacity of children which is gradually developed under the emotional stability facilitating psychological balance and to the development of sociality resulted by the act of ``Meme`` which generates the imitative cultural phenomena. Thus, the basic plasticity of illustrations for picture books mainly targeting preschool children should be examined from the perspective of emotional artistic value, different from the technical viewpoint that is applied to school-aged children and adolescents. Visual conceptual experiences in early and preschool childhood are perceived as a form of intuition, structure, and subjective emotion. The process of perceiving visual conceptual experiences as various forms is associated with sensory bundles received from sensory organs and they are recognized in the field of consciousness by selection and combination. In addition, intuition arouses another imagination and shapes emotion and knowledge by conceptualization. This paper deals with the characteristic of visual conceptual recognition in childhood as a human phenomenon of harmony and order and also discusses the educational effect of ecological illustrations in picture books for children on growth and development of sensibility, intellect, emotion and imagination.

부산 감만동 해상 지역의 점성토 압밀거동에 관한 연구

박인기(Park In-Ki),박성재(Park Sung Zae),이성국(Lee Sung Kook),정경환(Jeong Gyeong Hwan) 대한토목학회 2000 대한토목학회 학술발표회 논문집 Vol.2000 No.2

유아의 지역사회 참여 교육에 관한 탐색적 연구

박인기(Park In Ki) 한국변형영유아교육학회 2008 변형영유아교육연구 Vol.2 No.1

As the importance of child education is becoming more emphasized and its social demands are getting various in many ways, not only the importance of the education service of children but also the needs of inclusive education service that includes their family and community has been increased. A community is an important place for children to explore and interplay and also it's a good place to develop their physique and emotion to form their experience. When they are born, they among themselves in family and community and they form their ego in these environments and as they become socialized they develop themselves. Children's growth and experience is mostly effected by members of the family and community and it is very important to make the children to contribute to society. This essay is aimed to closely examine effectiveness of children's educational activity, 'becoming a member of a community' which understands the meaning of becoming a member of a community and participate progressively by applying experimental curriculum to approaches of Reggio Emilia to solve social problem. Under this aim, the problems raised in this study are: Firstly, I examined how children's educational institution and community linking program's activation effects children's cooperative learning. Secondly, I examined the changes in minds of welfare of local residents and awareness when children's are involved in a community. In this study, Reggio Emilia program is executed parallel to basic kindergarten's daily lesson in total of 17 times in 6 weeks. The researchers have involved in the education fields and anticipated every 5 year old target classes and put 6 of those who are interested (4 boys and 2 girls) into a small group and executed the procedure through conference with the researchers, main teachers and secondary teacher. Children's participation, observation and symbolic representation results are collected and results from digital camera, video capture and recorded tapes are recorded by description of scene, situation and movement, and verbal interactions are transcribed for analysis data. Drawings and presentations from children are analyzed for their activity conditions and verbal explanation as reference. 최근 유아교육에 대한 중요성이 강조되고 이에 대한 사회적 욕구가 다양화되면서 유아에 대한 교육서비스의 필요성뿐만 아니라 그 가족과 지역사회를 포괄하는 포괄적 교육서비스의 필요성이 증가되었다. 지역사회는 유아에게 탐구와 상호작용의 중요한 장이며 유아의 신체적 정서적 발달을 위한 장으로 유아의 경험을 형성하는데 매우 중요한 역할을 한다. 유아는 태어나면서 가정과 다양한 지역사회에 속하게 되며 이러한 환경 속에서 자아를 형성해 가고 사회화 되면서 자기 자신을 발전 시켜 나간다. 영유아 성장과 경험에 중요한 영향을 미치는 요인은 가족과 지역사회 구성원이며 성장하여 사회에 소속되어 사회에 기여 할 수 있는 인간으로 기르기 위해서 지역사회의 역할이 매우 중요하다. 본 논문에서는 레지오 에밀리아 접근법을 사회문제를 해결하는 시험적 교육과정에 적용하여, 지역사회 구성원으로서 의미를 이해하고 지역사회에 적극적으로 참여 할 수 있는 유아의 '지역사회 구성원 되기' 교육활동에 대한 효과성을 규명하는데 목적을 두고 있다. 이러한 목적 하에 본 연구에서 제기하고자 한 문제는 다음과 같다. 첫째 유아 교육기관과 지역사회 연계 프로그램의 활성화가 유아의 협력학습에 어떻게 영향을 미치는지 알아보았다. 둘째 유아의 지역사회 참여가 지역협력을 통한 지역주민들의 복지마인드 변화와 인식의 변화를 알아보았다.