관성 측정 센서를 활용한 이진 신경망 기반 걸음걸이 패턴 분석 시스템 설계 및 구현

나진호,지기산,정윤호,Na, Jinho,Ji, Gisan,Jung, Yunho 한국항행학회 2022 韓國航行學會論文誌 Vol.26 No.5

Compared to sensors mainly used in human activity recognition (HAR) systems, inertial measurement unit (IMU) sensors are small and light, so can achieve lightweight system at low cost. Therefore, in this paper, we propose a binary neural network (BNN) based gait pattern analysis system using IMU sensor, and present the design and implementation results of an FPGA-based accelerator for computational acceleration. Six signals for gait are measured through IMU sensor, and a spectrogram is extracted using a short-time Fourier transform. In order to have a lightweight system with high accuracy, a BNN-based structure was used for gait pattern classification. It is designed as a hardware accelerator structure using FPGA for computation acceleration of binary neural network. The proposed gait pattern analysis system was implemented using 24,158 logics, 14,669 registers, and 13.687 KB of block memory, and it was confirmed that the operation was completed within 1.5 ms at the maximum operating frequency of 62.35 MHz and real-time operation was possible.

인지갈등 수업전략을 통한 초등학생들의 지층에 관한 개념변화

나진호,정미영,경재복 한국지구과학회 2005 한국지구과학회지 Vol.26 No.8

Study courses using cognitive conflict strategy about geological stratum were performed on the 6th grade elementary students and their conceptual changes were investigated. Some misconceptions about geological stratum that the students have are as follows: (1) stratum was formed due to volcanic eruption, (2) gneiss composes the geological stratum, (3) folds in the stratum were formed due to vertical pressure from the top. The classes had positive effects on the changes of some the misconceptions: (1) the places where the stratum is formed, (2) the kind of rock in the stratum, and (3) the reason for folding. However, there were no significant changes in the following items: (1) the reason that every layer consists of different sizes of grains. It shows that some misconceptions can be changed easily by cognitive conflict strategy, while others can not. We checked the students who didn’t change their misconceptions after the test. These students have very strong misconceptions that most of the natural phenomena on the earth’s surface are due to the internal heat, pressure, and volcanic activity. Another factor affecting the students' misconceptions are the role of teachers in class and mass media, such as TV. 이연구는 6학년학생들에게서나타나는지층에관한비과학적개념을알아보고, 이를과학적개념으로변화시키기위하여인지갈등전략을이용한수업을적용한후, 학생들의비과학적개념에변화가있었는지를조사한것이다. 학생들의지층에관해비과학적개념을조사한결과, 지층이화산활동으로형성되었다고생각하는경우, 편마암이지층을형성하는암석이라고생각하는경우, 지층의습곡은위에서누르는힘때문에생긴다고생각하는경우등의비과학적개념이나타났다. 인지갈등전략을이용한수업을한후, 지층에관한비과학적개념의변화를알아보았다. 그결과, 지층이만들어지는곳, 지층에서볼수있는암석, 습곡이생기는이유에서는큰효과가나타났으나지층의알갱이가다른이유에는거의개념의변화가없었다. 따라서개념에따라인지갈등전략수업으로개념변화가쉬운개념이있는반면, 어려운개념도나타났다. 사후검사에서개념변화를이루지못한학생들에게비과학적개념형성원인을알아본결과, 지구내부에서일어나는현상에는지구내부의열과압력, 화산활동등의큰힘이작용했을것이라는학생들의견고한사전개념과교사가수업시간에한현상을강조하면다른영역의현상으로전이되는경향이나타났으며, TV 등의영상매체의역할이견고한비과학적개념을형성하도록하는것으로나타났다. 정규수업후일정시간이지난후에형성되어있는개념을알아보아인지갈등을적용했는데도개념변화가어려운것은지층에관한학생들의비과학적개념이변하기쉽지않은개념임을말하는것이다.

급성 내피손상을 받은 백서 대퇴정맥에서 냉동요법의 효과

박흥식,윤진호,김한중,나민화 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.5

In the case of crush injury, the failure rate of replantation of free tissue transfer is high. Recently, the freezing of intact and repaired microarteries has been known to relieve spasm without inducing thrombosis in vivo. Therefore, the author thought that the vascular freezing of crushed vein showing only unrecognized endothelial damage after adequate debridement of a damaged vessel can also relieve spasm without inducing thrombosis and improve the patency rate of microvascular anastomosis. In this study, the process of vascular freezing was investigated in veins with acutely damaged endothelium using ethly chloride in a rat model. Two experiments were performed in 30 Sprague-Dawley rats, weighing about 250 gm. In the first experiment, a new crush model was established on the femoral vein of the rats. The degree of vessel injury was evaluated as crush energy. The proper crush energy was determined only by the endothelial damage without inducing thrombosis(0.037 J). In the second experiment, femoral veins were crushed with the energy of 0.037 J on the left side and then frozen after inflicted crush injury with the same energy on the right side. The gross and pathologic findings and patency rates were observed at postoperative day 2, 10 and 30. Patency in both the crushed and crush-freezing group was 100%. Pathlolgic findings in the crush-freezing group were more severe loss of the intima and most parts of the media, as well as cellular depopulation of the media when compared to the crushed group. Microthrombi adherent to the wall were demonstrated in several crush-freezing specimens, but the crush-freezing group showed relief of crush-induced vasopasm and endothelial regeneration. In conclusion, the freezing of microveins with acute endothelial damage relieves spasm without inducing thrombosis. Therefore, this study presents the posslbility of clinical application of vascular freezing in a case of crush injury requiring microvascualr anastomosis.

Three-Dimensional Z-Plasty(Yoon's Method)를 이용한 내안각 췌피 성형술

박흥식,김우신,윤진호,나민화,김한중 대한미용성형외과학회 1997 Archives of Aesthetic Plastic Surgery Vol.3 No.1

The presence of epicanthal folds in Asian eyelids is one of their unique features, in combination with the lack of supratarsal folds. Western culture has influenced many people to prefer to eliminate the prominent epicanthal fold. A number of surgical techniques have been suggested for their correction. However, difficulty with design, excessive and prominent scarring of medial canthal and nasal area, recurrence, and rigidity of application are potential problems associated with many procedures. This paper describes a epicanthoplasty with three-dimensional Z-plasty. Through epicanthal fold incision, the medial canthal tendon is medially advanced and sutured to the periosteum of nasal bone. After the transposition of the flaps, trimming of the flap is usually required. Three-dimensional Z-plasty creates the attractive eyes. From March, 1995 to March, 1997, the technique was applied to 37 patients with epicanthal fold and was performed with or without double-fold operation. There were 34 females and 3 males with ages ranging from 17 to 30 years. Through 2 years follow-up, this technique has delivered esthetically good results with minimal postoperative scar and could made the reduction of ICD from 40 ± 2.13 mm to 34 ± 1.98 mm. The advantages of epicanthoplasty procedure using three-dimensional Z-plasty(Yoon's method) are as follows; 1) simple in design 2)minimal postoperative scar in the medial canthal area 3) versatile in its application 4) no recurrence 5) no hypertrophic scar 6) preserving ethnic identity.

운동역학 : 2000 세계 500m 스프린트 스피드 스케이팅 경기 분석

이연종(YeonJongLee),나연수(NaYoonSoo),백진호(BackJinHo) 한국체육학회 2001 한국체육학회지 Vol.40 No.4

본 연구의 목적은 2000년도 세계 500m 스피드 스케이팅 선수권 대회에 참가한 선수를 대상으로 기록과 스케이팅 변인과의 상관 관계를 살펴보는 것과 함께 상위 3위 이내에 입상한 외국선수와 우리나라 선수를 비교하여 경기력 향상에 기초자료를 제공하는 것이다. 최첨단비디오분석 장비를 이용하여 분석한결과 다음과 같은 결론에 도달하였다.1. 경기 기록은 첫 번째 0-100m 구간에서는 스트로크 빈도 그리고 곡선 주로인 100-200m와 300-400m 구간에서는 속도와 높은 상관관계를 나타내고 있었다. 곧 기록 향상은 곡선구간에서 속도의 증가를 의미한다2. 외국의 우수선수와 우리나라 선수를 비교해 볼 때, 구간별 시간은 0-100m와 100-200m 구간에서 그리고 속도는 0-100m와 100-200m, 200-300m 구간에서 외국 선수에 비해 다소 저조한 기록을 나타내고 있었다. 그러나 스트로크 빈도는 외국선수와 차이를 보이고 있지 않았으나 스트로크 거리는 200-400m 구간에서 외국 선수보다 열세한 양상을 보이고 있었다. The purpose of this study was to investigate the correlation between final record and the selected stroke variables in 500m sprint skating, and to compare the korean speed skater with 3 top ranked speed skate in 2000 World Sprint Speed Skating Championship. 33 speed skaters participated in 2000 World 500m Sprint Speed Championship, were selected as subject for analysis. 500m race was divided into 5 intervals. The time, velocity variables such as the interval times and interval velocity and the stroke variables such as stroke frequency and the stroke length were obtained through the race analysis. The following observations were made from the data analysis: (a) The final record highly correlated with stroke frequency on 0-100m and stroke velocity on 100-200m and 300-400m. (b) The Korean speed skater revealed lower interavl time on 0-100m and 100-200m, slower stroke velocity on 0-100m, 100-200m and 200-300m and shorter stroke length on 200-400m than 3 top ranked players.

PEFP 20 MeV 양성자 선형가속기의 진공 시스템

박미영,권혁중,김영준,나진호,설경태,심찬보,장지호,정경근,조용섭,한상효 한국진공학회 2003 한국진공학회 학술발표회초록집 Vol.- No.-

우리나라 연안에서 출수된 고선박 부재와 표류목에 나타난 해양천공동물의 종 식별및 가해 양상 분석

김응호,임익균,조효진,나진호,조수원,한규성 한국문화재보존과학회 2023 보존과학회지 Vol.39 No.3

본 연구에서는 우리나라 해안에서 발굴된 고선박 부재에서 나타나는 천공 피해 양상을파악하고 가해하는 생물을 추정하고자 하였다. 이를 위해 추포해변, 신창리해역, 비인해변에서채취한 표류목과 신진도해변에 설치한 시험말뚝으로부터 두 종류의 가해 동물을 채집하여 외관 관찰과 DNA 분석을 통해 종 동정을 실시하였다. 이들 표류목과 시험말뚝의 해양천공동물에의한 피해 양상을 파악하여 기존 출수된 고선박 부재의 피해 양상과 비교 분석하였다. 표류목과 시험말뚝에서 발견된 해양천공동물은 DNA 분석 및 외형 관찰을 통해 배좀벌레조개(Teredonavalis)와 부삽꼬리벌레(Limnoria lignorum)로 확인되었다. T. navalis는 목재의 횡단면에서 섬유방향을 향해 지름 3-5 mm 정도의 공도를 뚫고 들어갔으며, 길이 7 cm의 목재가 완전히 관통될정도로 가해하였다. 생성된 공도 내부에는 석회질의 패각이 형성되었다. 일부 표류목에서는T. navalis에 의한 가해 흔적에서 섬유방향 뿐만 아니라 방향성이 없는 공도도 관찰되었다. L. lignorum은 목재의 표면에서 지름 1 mm 이하의 작은 구멍을 뚫고 갉아먹으며 가해하였다. 고선박 부재의 경우 발굴 당시 개펄에 묻혀있지 않고 바닷물에 노출되었던 상단부 부재에서 T. navalis에 의한 가해 흔적이 주로 나타났다. L. lignorum에 의한 가해 흔적은 고선박의 상단부나부재의 표면에서 매우 적게 관찰되었는데, 이는 연약해진 피해부가 바닷속에서 해류의 움직임에 의해 마모되어 떨어져 나갔기 때문일 것으로 추정된다. In this study, we aimed to identify the patterns of perforation damage on shipwreckmembers excavated from the Korean coast and to estimate the organisms responsible. Two types ofmarine borers were collected from driftwood collected from Chupo Beach, Shinchang-ri Beach, andBiin Beach, and test piles installed at Shinjindo Beach, and species identification was conducted throughvisual observation and DNA analysis. The damage patterns of marine borers on the driftwood andtest piles were identified and compared with the damage patterns of the shipwreck members. Themarine borers found in the driftwood and test piles were identified as Teredo navalis and Limnorialignorum through DNA analysis and visual observation. T. navalis bored 3-5 mm diameter tunnelsin the cross-section of the wood towards the fiber direction, and the damage was severe enough tocompletely penetrate a 7 cm long piece of wood. The tunnels were lined with calcareous materialextruded by T. navalis. In some driftwood, fiber-oriented as well as random-directional tunnels wereobserved in T. navalis damage scars. In shipwreck members, T. navalis damage was primarily seenin the upper members, which were exposed to seawater and not buried in mud on the shore at thetime of excavation, where L. lignorum drilled and gnawed small holes of less than 1 mm diameterin the surface of the wood. Very little evidence of damage by L. lignorum was rarely observed onthe topsides of shipwrecks or on the surfaces of members, presumably because the fragile damagewas worn away by the movement of currents at sea.

A Method to Identify the Sex of Cultured Eel (Anguilla japonica) using the Pectoral Fin Length: Total Body Length Ratio

Shin-Kwon KIM(김신권),Ji-Yeon HYEON(현지연),Jin-Ho NA(나진호),Bong-Soo LIM(임봉수),Sung-Pyo HUR(허성표) 한국수산해양교육학회 2021 水産海洋敎育硏究 Vol.33 No.1

국내양식 민물장어 4 종(Anguilla japonica, A. rostrata, A. bicolor pacifica 및 A. marmorata)의 주요 영양성분의 평가

안준철 ( Jun Cheul Ahn ),정원석 ( Won Seog Chong ),나진호 ( Jin Ho Na ),윤형복 ( Hyoeng Bok Yun ),신경재 ( Kyung Jae Shin ),이경우 ( Kyeong Woo Lee ),박준택 ( Jun Taek Park ) 한국수산과학회 2015 한국수산과학회지 Vol.48 No.1

The basic and main nutritive ingredients of two temperature (Anguilla japonica and A. rostrata) and two tropical ( A. bicolor pacifica and A. marmorata) fresh water eel species that are farmed domestically were evaluated. With exception of A. rostrata, eels cultured at the same farm were used for analysis. The contents of crude protein were in the order A. marmorata (17.7%)> A. rostrata (17.5%)> A. bicolor pacifica (17.4%)> A. japonica (15.8%) and the contents of crude lipids were A. japonica (21.5%)> A. rostrata (15.4%)> A. bicolor pacifica (10.5%)> A. marmorata (8.9%). These values differed significantly even among the three species of eel farmed under identical culture conditions. In comparison, all four species of eel showed similar pattern in overall amino acid composition, although slight differences in the compositions of some amino acids were observed. The fatty acid compositions of muscle tissues were notably different among four species of eel, especially between the tropical and temperature eels. In a taste-test of the meat of the four eel species, which considered taste, flavor and texture, the overall preference was in the order A. japonica, A. marmorata, A. bicolor pacifica and A. rostrata.

2020년 국내 비래 벼멸구와 흰등멸구의 약제 저항성 점 돌연변이 조사

신은경(Eungyeong Shin),강열규(Yeol-Gyu Kang),정수연(Su-Yeon Jeong),나진호(Jin-Ho Na),구현나(Hyun-Na Koo),김길하(Gil-Hah Kim) 한국농약과학회 2021 농약과학회지 Vol.25 No.4