Design of DC Small Motor Fixings and Rotors for Torque Improvement

박효진(Hyo Jin Park) Korean Society for Precision Engineering 2019 한국정밀공학회지 Vol.36 No.11

This paper addresses the design of an integrated high torque DC motor. In this paper, a method to improve the torque according to the shape of the stator magnet and the rotor teeth of the DC motor is studied. During the course of design, the rotor and stator are designed to satisfy the required performance through FEM analysis by reflecting similar materials in design. As a result of satisfying the design result and requirements, the motor that is imported and operated in the future can be applied as a domestic developed product.

Nitric Oxide와 Vasoactive Intestinal Peptide가 기니 픽 위저부 평활근 이완에 미치는 영향

박효진(Hyo Jin Park),이영호(Hyo Jin Park),이혜영(Hye Young Lee),정준표(Jun Pyo Chung),이관식(Kwan Sik Lee),전재윤(Chae Yoon Chon),강복순(Bok Soon Kang),박인서(In Suh Park) 대한소화기학회 1997 대한소화기학회지 Vol.29 No.3

N/A Background/Aims: The autonomic nervous system distributed throughout the stomach consists of adrenergic, cholinergic, and non-adrenergic, non-cholinergic (NANC) nerves. Of these, NANC nerve fibers are known to be distributed all throughout the gastrointestinal tract and they provide the main inhibitory nerve supply to the gut smooth muscle. NANC nerve is known to release neurotransrnitters such as nitric oxide (NO), adenosine 5-triphosphate (ATP) and vasoactive intestinal peptide (VIP). However, the effect produced by each of the NANC neurotransmitter depends on an animal species and parts of gastrointestinal tract. Therefore, this experiment applied electrical field stirnulation at the circular musc]e of a guinea pigs gastric fundus to observe any relation of NANC nerve in muscu]ar relaxation. Methods: The effect of ATP, VIP, and NO on muscle re)axation was determined through the electrical field stimulation, and each neurotrans- mitters ability to regulate the muscle relaxation was compared. Results: Muscle strips were relaxed in response to electrical field stimulation that was applied. The relaxation was not inhibited by atropine or guanethidine, but was completely inhibited by tetrodotoxin. The muscle relaxation caused by NANC nerve stimulation was inhibited by L-NNA, VIP antagonist, and suramin. L-NNA was the most potent inhibitor among them. The muscle relaxation caused by electrical field stimulation was not further inhibited by VIP antagonist after the pretreatment of L-NNA, however, it was further inhibited by L-NNA following the treatment of VIP antagonist. The electrically stimulaed induced muscle relaxation was almost complete]y abolished by coadministration of L-NNA with VIP antagonist and suramin, The exogenous VIP-induced muscle relaxation was not affected by presence or absence of L-NNA. Oxyhemoglobin or methylene blue treatment inhibited the muscle relaxation induced by electrical field stimulation. Conclusions: Non-adrenergic and non-cholinergic nerve has an inhibitory neurotransmission in a guinea pigs gastric fundus circular muscle and NO is the principal inhibitory neurotransmitter of NANC nerve. NO mediated muscle relaxation is thought to be associated with increase of cGMP in muscle cells. (Korean J Gastroen- terol 1997;29:2S9 - 300)

운용성을 개선한 항공기용 질소충전트레일러 국산화 개발

박효진(Hyo-Jin Park) 한국항공우주학회 2018 韓國航空宇宙學會誌 Vol.46 No.6

KUH-1에 적용되는 질소충전트레일러는 항공기의 주/전륜 완충기, 테일범퍼완충기, 브레이크 축압기, 타이어 등에 질소를 충전하는 장비이다. 명칭에서 알 수 있는 것과 같이 질소충전트레일러는 질소 충전과 더불어 이동성을 가지고 있는 장비이다. 기존 미국의 Tronair사에서 독점 공급하여 국내에서는 수입에 의존하던 품목이며, 본 국산화 개발품은 도입품의 성능을 만족할 뿐만 아니라 운용 시 도입품보다 용이하도록 설계를 추진하였다. 제15-4차 민관공동투자사업으로 선정되어 개발이 진행되었으며, 민관투자기업인 한국항공우주산업과 국방기술품질원의 개발관리 지원하에 개발요구도 분석 및 시험평가가 수행되었으며, 2017년 5월 군사용 적합 판정 결과 승인을 받았다. Nitrogen charging trailer applied to KUH-1 is a device to charge Nitrogen in main front wheel buffer, tail bumper buffer, brake accumulator and tire of aircraft. As the name suggests, it is a device that has mobility along with nitrogen charging. Originally supplied by Tronair in the United States, it was imported from Korea, and the locally developed product not only satisfies the performance of the existing product, but also designed to be easier than the product introduced in the operation. It was selected as the joint investment project of the 15th civilian government building, and development needs analysis and test evaluation were carried out under the support of development and management of Korea Aerospace Industries and Defense Agency for Technology and Quality.

대장 흑색소증의 임상적 고찰

박인서(In Suh Park),문영명(Young Myoung Moon),정재복(Jae Bock Chung),이상인(Sang In Lee),김원호(Won Ho Kim),이관식(Kwan Sik Lee),정현주(Hyeon Joo Jeong),박효진(Hyo Jin Park),정준표(Jun Pyo Chung),박경아(Kyung Ah Park),남문석(Moon Suk 대한소화기학회 1993 대한소화기학회지 Vol.25 No.5

N/A Melanosis coli associated with ingestion of anthraquinone compounds in laxatives is due to accumulation of macrophages containing brown lipofuscin-like pigments in the lamina propria. We analyzed the clinical, endoscopic, and pathologic findings and colonic motor functions of melanosis coli and performed electronmicroscopic study to know the ultrastructural changes of neural elements. We studied 13 cases (mean age 48.1 +- 18.5 years, male to female cases 6:7). The vegetable laxatives containing anthraquinone derivatives, aloe or bisacodyl were used mainly and the mean duration of laxative abuse was l.5 +- 1.2 years. Endoscopically, dark brownish mucosal disoloration showed polyhedral forms divided by fine striae of lighter color. Melanosis was more intense in the more oral part of the bowel. Pathologically, no relationship was found between grade of melanosis and kind of drugs, daily dose, or durat.ion of addiction. Ultrastructural features on nerve structure were ballooning of axon. reduction of nerve specific cell organelles, and increased lysosomal activity. The alterations of these neural elements are assumed to he associated with impaired colonic motility. In conclusion, vegetable laxatives such as aloe, seem to be an important causes of melanosis coli in Korea. melanosis coli have a tendency to damage nerve fibers. We should avoid laxative abuse in order to prevent pragressing to cathartic colon.

팔십여 회의 색소 레이저 치료는 멜라닌 세포 모반의 어느 깊이까지 영향을 미칠까?

박효진 ( Hyo Jin Park ),박철종 ( Chul Jong Park ),이경호 ( Kyung Ho Lee ) 대한피부과학회 2021 대한피부과학회지 Vol.59 No.6

Total excision is the treatment of choice of congenital melanocytic nevus. However, it is often infeasible, laser therapy is being explored as a useful therapeutic approach. A 26-year-old woman presented with a solitary, skin-colored plaque surrounded by whitish patches on her right calf. She was diagnosed with a congenital melanocytic nevus and underwent 84 laser treatment sessions using a 1,064 nm Nd:YAG laser over 7 years. Histopathological examination of the whitish plaque revealed small foci of nevus cells that penetrated the tissue to a depth that was 12-fold higher than the epidermal depth (1,260 μm). No report in the literature describes histopathological findings of a congenital melanocytic nevus treated with 84 sessions of laser therapy. This case report highlights the depth of penetration of pigment laser to treat a congenital melanocytic nevus. Our findings will serve as useful clinical guidelines to perform laser treatment for congenital melanocytic nevi. (Korean J Dermatol 2021;59(6):474∼476)

Helicobacter pylori 에 대한 혈청 IgG 항체의 양성율 및 혈청 Pepsinogen 과의 상관관계

박효진(Hyo Jin Park),이병권(Byoung Kwon Lee),정준표(Jun Pyo Chung),조현근(Hyeon Geun Cho),이상인(Sang In Lee),박인서(In Suh Park),손영모(Young Mo Sohn),이창훈(Chang Hoon Lee),송경순(Kyung Soon Song) 대한내과학회 1995 대한내과학회지 Vol.48 No.1

N/A Objectives: This study was designed to estimate the prevalence of Helicobacter Pylori infection in a healthy population in Korea and correlate between H. Pylori infection and serum pepsinogen levels as markers of gastritis and atrophic gastritis. Methods: We collected sera obtained form 104 children and 173 adult who had no gastrointestinal symptoms and measured specific IgG antibodies against H. Pylori by Bio-Rad G. A. P test. Serum pepsinogen 1 and 2 concentrations were determined by radioimmunoassay. Results: 1) The frequency of H. Pylori infection increased with age and was more than 80% over age 40. 2) Serum pepsinogen 1 and 2 concentrations in the healthy population were increased with age, while the serum pepsinogen 1/2 ratio decreased. 3) There were no significant statistical differences between the titre of specific IgG antibodies against H. Pylori and serum pepsinogens. Conclusion: The data from this study suggested that the prevalence of Helicobacter Pylori infection increased with age and serum pepsinogen levels were related to the presence or absence of H. Pylori infection. We conclude that H. Pylori infection is one of the factors which helps develop atrophic gastritis, the precursor lesion of gastric cancer.

안면·두피·데콜테 관리가 중년여성의 스트레스에 미치는 영향

박효진 ( Hyo-jin Park ),장숙희 ( Suk-hee Jang ),최세영 ( Se-young Choi ),이인희 ( In-hee Lee ) 한국미용예술경영학회 2012 미용예술경영연구 Vol.6 No.4

This study was carried out to find out the effects on the overall stress of middle-aged woman in the facial treatment going side by side with treatment of scalp and d▯collet▯, and the treatment was carried out for middle-aged women 20 people twice a week for a total of 8 times as to be divided into Group A (n=7) for facial treatment, Group B (n-=7) for facial and scalp treatment Group C (n-6) for facial and dècolletè treatment and the following conclusions were obtained by the EEG (Electro Encephalo Graph) measurements after facial, scalp and dècolletè treatment. There was a significant difference in Group B for facial and scalp treatment in ‘physial stress (left and right)’, ‘Psychological stress (left and right) and the ‘anti -stress (left and rignt)’. These results from the treatment of scalp are thought to help promote a smooth supply of oxygen in the brain and to help relax from the excitement of the mind, and to be increased bodys resistance to stress by the stability of the body and mind due to ease the physical and psychological stress. And the variety of research and program development for the effects on the stress of middle-aged women is expected to be applied to an alternative therapy of stress relief them in the future.

만성 특발성 변비증의 임상적 고찰

박효진(Hyo Jin Park),이찬희(Chan Hee Lee),정준표(Jun Pyo Chung),이관식(Kwan Sik Lee),이상인(Sang In Lee),박인서(In Suh Park),손승국(Seung Kook Sohn),지훈(Hoon Ji),강성웅(Seoung Woong Kang) 대한내과학회 1994 대한내과학회지 Vol.46 No.5

N/A Objectives: As nonorganic, or functional factors play an important etiopathogenetic role in chronic constipation, we have reviewed functional tests on patients with chronic idiopathic constipation. Results of investigation and subsequent proper treatment are suggested. Methods: Clinical assessment, colonic transit, defecogram, anorectal manometry and pelvic floor electrophysiologic tests were performed in 30 patients with chronic idiopathic constipation, Results: 1) The ratio of male to female was 1:4, and the mean age was 48.2 years. Primary complaints were incomplete evacuation (83.3%), abdominal fullness (70.0%), abdominal pain (70.0%), rectal bleeding (43.3%), nausea (33.3%), tenesmus (33.3%) and dysuria (20.0%). Hemorrhoids and melanosis coli were present in 70.4% and 11.1% of the patients respectively at colonoscopy. The types of personality using the Minnesota Multiphasic Personality Inventory showed somatization 50.0% and psycho- physiological reaction 41.7%. 2) Colonic transit studies identified three patterns: normal transit 38.9%, colonic inertia 22.2%, pelvic outlet obstruction 16.7%, and mixed type 22.2%. The mean transit time of total colon was 56.4±5.0 hr. in colonic inertia and mixed type. 3) Defecogram revealed rectocele 77.8%, incomplete evacuation 48.1%, paradoxical contraction of puborectalis 40.7%, rectal intussusception 25.9%, parietal rectal rigidity 11.1%, and excessive pelvic floor descent 11.1%. 4) The mean minimal sensory volume, anal sphincter length, maximum resting and squeeze anal pressure was 47.9±17.5 ml, 3.9±0.9 cm, 104.3±17.9mmHg and 156.4±15.0mmHg respectively. The anorectal inhibitory reflex was intact in all patients. 5) Electrophysiologic studies suggested pudendal neuropathy in 5 patients (27.8%). 6) The patients were treated by drug therapy 83.3%, biofeedback therapy 10.0% and operation 6.7%. Conclusion: From the above results, systematic diagnostic evaluation and proper treatment for the patients with chronic idiopathic constipation in view of functional motility disorder are required and treatment can be helpful particularly when directed by a multidisciplinary team approach.

과학교과교육 : 편동풍 파동에 의한 연직운동

박효진 ( Hyo Jin Park ),문병권 ( Byung Kwon Moon ) 전북대학교 과학교육연구소 2013 과학과 과학교육 논문지 Vol.38 No.1

최근 교육과정으로 편동풍 파동과 열대성 저기압의 관계가 새롭게 추가되었다. 그런데 참고할만한 문헌의 부족으로 학교현장에서 이 내용을 다루는데 어려움이 있다. 이 짧은 노트는 편동풍 파동과 연관되어ㅓ 나타나는 연직운동의 과정을 쉽게 이해하는데 도움이 되는 방법을 제안하였다. 편서풍 파동에서 나타나는 경도풍과 지균풍속의 크기 비교를 통해 편서풍과 중위도 저기압의 발달을 이해할 수 있듯이, 편동풍 파동에서도 비슷한 방법을 통해 편동풍 파동과 상승운동의 관련성을 이해할 수 있음을 보였다. 여기서 편서풍과는 달리 편동풍 파동이 열대의 하층에서 발생하는 점을 고려하는 것이 필요하다. This short note proposed a new teaching strategy for understanding the tropical easterly waves and its associated vertical motions. Similar to the upward and downward motions associated with mid-latitude baroclinic wave, the comparison of wind speed between gradient winds and geostrophic wind also provide us with a useful tool for easterly waves and vertical motions. Only a different point is that the easterly waves in tropics are mainly occurred low-level troposphere.

인터랙티브 디자인 분야의 새로운 패러다임과 인력 양성

박효진 ( Hyo Jin Park ) 가톨릭대학교 콘텐츠산업과 문화정책연구소 2007 디지털콘텐츠와 문화정책 Vol.1 No.-