머신러닝 기반 낙상 인식 알고리즘

정준현(Joon-Hyun Jeong),김남호(Nam-Ho Kim) 한국정보통신학회 2021 한국정보통신학회 종합학술대회 논문집 Vol.25 No.2

구글사에서 출시된 ML Kit API의 Pose detection를 사용한 영상기반 낙상 알고리즘을 제안한다. Pose detection 알고리듬을 사용하여 추출된 신체의 33개의 3차원 특징점을 활용하여 낙상을 인식한다. 추출된 특징점을 분석하여 낙상을 인식하는 알고리듬은 k-NN을 사용한다. 영상의 크기와 영상내의 인체의 크기에 영향을 받지 않도록 정규화과정을 거치며 특징점들의 상대적인 움직임을 분석하여 낙상을 인식한다. 본 실험을 위해 사용한 13개의 테스트 영상중 13개의 영상에서 낙상을 인식하여 100%의 성공률을 보였다. We propose a fall recognition system using the Pose Detection of Google ML kit using video data. Using the Pose detection algorithm, 33 three-dimensional feature points extracted from the body are used to recognize the fall. The algorithm that recognizes the fall by analyzing the extracted feature points uses k-NN. While passing through the normalization process in order not to be influenced in the size of the human body within the size of image and image, analyzing the relative movement of the feature points and the fall recognizes, thirteen of the thriteen test videos recognized the fall, showing an 100% success rate.

Iridovirus의 해산 양식어류에 대한 병원성과 사육수에서의 검출

정준범 ( Joon Bum Jeong ),정현도 ( Hyun Do Jeong ) 한국수산학회 2008 한국수산과학회지 Vol.41 No.1

지역난방 냉각수 배관의 용접부 파손 분석

정준철 ( Joon-cheol Jeong ),김우철 ( Woo-cheol Kim ),김경민 ( Kyung Min Kim ),손홍균 ( Hong-kyun Sohn ),김정구 ( Jung-gu Kim ),이수열 ( Soo-yeol Lee ),김희산 ( Heesan Kim ) 한국부식방식학회(구 한국부식학회) 2020 Corrosion Science and Technology Vol.19 No.6

Failure analysis on the welded type 304 pipe used for cooling water piping in the district heating primary side was conducted. Inorganic elements and bacteria in the cooling water and in corrosion products were analyzed, and the weldment was inspected by microscopy and a sensitization test. Corrosion damages were observed in the heat-affected zone, on weld defects such as incomplete fusion or excessive penetration caused by improper welding, or/and at the 6 o'clock position along the pipe axial direction. However, the level of concentration of chloride in the cooling water as low as 80 ppm has been reported to be not enough for even a sensitized type 304 steel, meaning that the additional corrosive factor was required for these corrosion damages. The factor leading to these corrosion damages was drawn to be the metabolisms of the types of bacteria, which is proved by the detection of proton, sulfur containing species, biofilms, and both bacteria and corrosion product analyses.

수술 후 방사선 단독 치료를 시행한 원발성 척수 종자세포종 1예

정준원 ( Joon Won Jeong ),노상영 ( Sang Young Roh ),양지현 ( Ji Hyun Yang ),노상미 ( Sang Mi Ro ),이정의 ( Junguee Lee ),김인호 ( In-ho Kim ) 대한내과학회 2018 대한내과학회지 Vol.93 No.4

원발성 척수 종자세포종은 매우 드물게 발생하는 질환으로 국내에서는 아직까지 문헌상으로 보고된 증례가 매우 드물기에, 저자들의 병원에서 발견된 예를 경험하고 보고하는 바이다. 영상 검사만으로는 감별진단이 어려울 수 있으므로 조직학적 검사가 거의 항상 요구되며, 조직 소견에서 융합세포영양막성 거대세포의 존재 유무는 질병의 경과 및 재발을 예측하게 해주는 중요한 지표이므로 이를 반드시 확인하는 과정이 필요하다. 수술적 치료 후에는 방사선 치료나 항암치료를 시행할 수가 있으나 종자세포종은 일반적으로 방사선 치료에 좋은 반응율을 보이므로, 본 증례에서는 수술적으로 완전절제 후 방사선 치료를 시행함으로써 현재까지 재발의 소견이 없는 상태이다. A 32-year old male came to our hospital with chief complaint of paraplegia. He had symptom of radiating pain to right leg 3 months ago before paraplegic symptom appeared. Magnetic resonance (MR) imaging from outside hospital showed intramedullary mass involving from T8 to T10 level of spinal cord. According to the imaging result, tumor removal with total laminectomy was performed between T8 and T10 level in our hospital. Pathologic result was compatible with germinoma. Spine radiation (39.6 Gy/22 fx) from T7 to T12 level without chemotherapy was performed 3 weeks later since tumor removal. Follow-up MR imaging showed no recurrence without any distant metastasis. And our patient’s neurologic symptom had been improved. According to this case, postoperative radiotherapy is thought to be effective to primary spinal germinoma. (Korean J Med 2018;93:404-408)

고속 이산 코사인 변환을 이용한 새로운 경량화 콘볼루션 신경망

정준현(Joon-Hyun Jeong),배성호(Sung-Ho Bae) 한국정보과학회 2019 한국정보과학회 학술발표논문집 Vol.2019 No.6

국내 여윔 넙치에서 검출된 점액포자충 Parvicapsula sp.의 정량적 분석

김승민,정준범,Kim, Seung Min,Jeong, Joon Bum 한국어병학회 2018 한국어병학회지 Vol.31 No.2

여윔증상이 나타난 양식장(farm-B 및 farm-C)의 넙치 및 여윔증상이 나타나지 않은 양식장(farm-A) 넙치의 각 내부 장기(신장, 장, 비장, 뇌 및 간)를 대상으로 점액포자충 Parvicapsula sp.의 양적 분석을 real-time PCR 방법을 사용하여 각각 실시하였다. 여윔증상을 보였던 farm-C의 넙치 신장에서 가장 높은 DNA copy number ($1.7{\times}10^7copies/mg$ tissue)를 보였고, farm-B의 넙치에서는 모든 내부 장기에서 낮은 수치가 나타났으며, farm-A의 넙치에서는 모든 내부 장기에서 음성 결과를 나타내었다. 동일한 시료를 사용한 PCR 및 병리조직학적 분석에서도 real-time PCR에서의 결과와 같은 양상을 보였다. Quantitative analysis of a myxosporean parasite, Parvicapsula sp. in internal organs (kidney, intestine, spleen, brain and liver) from non-emaciated (farm-A) or emaciated (farm-B and farm-C) olive flounder Paralichthys olivaceus were performed by real-time PCR. The highest DNA copy number ($1.7{\times}10^7copies/mg$ tissue) was detected in kidney of the emaciated olive flounder from farm-C, while the DNA copy number was below detection limit in all the organs of the olive flounder from farm-B. There was not positive result in all of organs from olive flounder in farm-A. PCR and histopathological analysis were also performed using the same specimen and showed same results as those by real-time PCR.

선거자금과 지역주의 : 제19대 국회의원 선거자금에 나타난 지역주의 정도의 측정

김정도(Jeong Do Kim),정준표(Joon Pyo Jung) 동아시아국제정치학회 2016 국제정치연구 Vol.19 No.1

In this paper, we use index for measuring homogeneous distribution of political funds in the 19<SUP>th</SUP> Korean National Assembly Election which includes region homogeneity as well as party homogeneity. This study uses the National Election Commission’s official political finance data for the 19<SUP>th</SUP> National Assembly Election to analyze homogeneous distribution of Campaign finance income, campaign expenditure, and campaign contribution. The empirical results indicate that Saenuri Party shows heterogeneous distribution of political funds in Gwangju and Jeonnam provinces. On the other hand, Democratic United Party and Liberty Forward Party show the most heterogeneous distribution in Daegu and Gyeongbuk provinces. The results also show that the campaign contribution has an influence on homogeneous distribution of political funds, comparing candidates’ assets and funds provided by parties which are another classified election finance. In addition, The results show that regional homogeneity index of political funds has the lowest score at Yeungnam, Honam, and Choongchung provinces.

Pearl Gourami (Trichogaster leeri)로부터 분리한 Iridovirus의 유전적 특성과 병원성 분석

김호열,정준범,전려진,윤소혜,조혜진,정현도,Kim, Ho Yeoul,Jeong, Joon Bum,Jun, Lyu Jin,Yoon, So Hye,Cho, Hye Jin,Jeong, Hyun Do 한국해양바이오학회 2006 한국해양바이오학회지 Vol.1 No.3

본 연구에서는 비장 내의 비대해진 세포 존재와 조직 괴사라는 병리조직학적 관찰에 의하여 우리 나라의 pearl gourami (Trichogaster leeri)에서 iridovirus에 의한 자연 감염이 나타남을 확인하였다. 이러한 iridovirus 감염을 더욱 정확하게 진단하기 위해서 iridovirus 감염 진단에 주로 사용되는 MCP와 ATPase gene 부위에서 2 primer sets를 제작하여 PCR을 실시한 결과, PCR 생성물은 기대한 size와 부합하게 나타났고, MCP gene 부위의 염기서열은 reference strain인 ISKNV와 매우 높은 유사성 (99.6%)을 보였다. 공격 실험을 통하여 pearl gourami에서 분리된 iridovirus의 병원성을 확인하였고, 무분별한 관상어 관리에 의하여 관상어로부터 양식어류에로의 질병 전이가 나타남으로서 일어날 수 있는 국내 양식 산업에 대한 위험성을 제시하였다. In the survey of the samples infected by iridovirus, we found the natural outbreak of iridovirus disease in the ornamental fish, pearl gourami (Trichogaster leeri) in Korea. It was characterized by the appearance of enlarged cells and necrosis in the observation of the imprinted spleen cells under iridovirus. To determine the infection of iridovirus more accurately, PCR using 2 different primer sets for MCP and ATPase gene used for the diagnosis of iridovirus infection was done and found the produced fragments matched with the size of expectation. Partially determined nucleotide sequences of the MCP gene of the iridovirus isolated in this study showed very high homology (99.6%) with that of ISKNV as a reference strain. In challenge experiment with the iridovirus isolated from the moribund of pearl gourami, the pathogenicity of the isolated iridovirus was confirmed and suggested the potential of the risk associated the transfer of iridovirus from the ornamental fishes to the marine culturing fishes.

Oxytetracycline과 neomycin 복합제의 약욕에 따른 양식 넙치(Paralichthys olivaceus)의 근육내 잔류량 변화

김승민,전려진,정준범,Kim, Seung Min,Jun, Lyu Jin,Jeong, Joon Bum 한국어병학회 2015 한국어병학회지 Vol.28 No.1

본 연구에서는 넙치 (평균체장 및 무게: $20{\pm}2.0cm$, $70{\pm}5.0g$)에 옥시테트라사이클린(oxytetracycline, OTC)-네오마이신(neomycin, N) 복합제를 25-10 ppm 및 50-20 ppm으로 용해하여 2일 동안, 3시간씩 약욕을 실시하였고, 약물투여 중지 후 1일, 5일, 14일, 40일째에 시험군별로 각각 5마리씩 넙치의 근육을 채취하여 항생제 잔류농도를 조사하였다. OTC와 N 표준용액을 농도별로 희석하여 표준곡선을 작성한 결과 각각 $R^2=0.9999$, $R^2=0.9952$로 양호한 직선성을 나타내었고, OTC와 N 회수율은 각각 90~93%, 88~95%가 관찰되었다. 잔류농도에 대한 측정결과, OTC와 N 복합제를 25-10 ppm 투여한 시험군에서 1일째 OTC는 $0.97{\pm}0.084{\mu}g/ml$이 검출되었고, N은 $0.118{\pm}0.079{\mu}g/ml$이 검출되었으나 5일째 이후부터 검출이 되지 않았다. OTC와 N 복합제를 50-20 ppm 투여한 시험군에서 1일째 OTC는 $1.324{\pm}0.062{\mu}g/ml$이 검출되었고 N은 $0.788{\pm}0.05{\mu}g/ml$이 검출되었으나 5일째 이후부터 검출이 되지 않았다. In the present study, we performed a dipping of olive flounder (average length and weight: $20{\pm}2.0cm$, $70{\pm}5.0g$) for a period of three hours a day, over two days, in a melted complex of oxytetracycline (OTC) and neomycin (N), by dissolving 25-10 ppm or 50-20 ppm in water. Subsequently, the remaining antibiotic density in muscle tissue collected from olive flounder was investigated, 1, 5, 14 and 40 days after discontinuation of the medication. 5 fish were used from each group. The standard graph drawn from the results of diluting two standard solutions of OTC and N based on various density levels, showed a relatively straight line with an $R^2$ of 0.9999 and 0.9952, respectively. The recovery rate of OTC was shown to be 90-93% and N, 88-95%. Upon measurement of the remaining antibiotic density in the test group that had been exposed to 25-10 ppm of the complex of OTC and N, $0.97{\pm}0.084{\mu}g/ml$ of OTC and $0.118{\pm}0.079{\mu}g/ml$ N were detected on 1 day of the test. No antibiotic density was detected after day 5 of the test. Regarding the test group that were exposed to 50-20 ppm of the complex of OTC and N, $1.324{\pm}0.062{\mu}g/ml$ of OTC and $0.788{\pm}0.05{\mu}g/ml$ N were detected on day 1 of the test, and no antibiotic density was detected after day 5 of the test.

급성 췌장염의 진단에 있어서 Urinary Trypsinogen-2 Dipstick 검사의 유용성

황성준 ( Seoung Joon Hwang ),정준표 ( Jun Pyo Chung ),김영균 ( Young Gyun Kim ),송대훈 ( Dae Hoon Song ),이재성 ( Jae Sung Lee ),백승석 ( Seung Seok Baek ),김도연 ( Do Yun Kim ),이덕용 ( Dok Yong Lee ),정연수 ( Yon Soo Jeong ) 대한소화기학회 2004 대한소화기학회지 Vol.43 No.6

Background/Aims: The clinical usefulness of urinary trypsinogen-2 dipstick test is still in controversy. We evaluated the usefulness of urinary trypsinogen-2 dipstick test in patients with acute pancreatitis. Methods: Urinary trypsinogen-2 dipstick test was prospectively performed in 50 patients with acute pancreatitis, 50 patients with non-pancreatic abdominal pain, and 50 healthy controls. Results: On admission, urinary trypsinogen-2 dipstick test was positive in 36 of 50 patients with acute pancreatitis (sensitivity, 72%) and in 4 of 50 patients with non-pancreatic abdominal pain (specificity, 92%). On the other hand, it was all negative in controls. The sensitivity and specificity of serum lipase were 78% and 94%, respectively. At 24 hours after admission, the positive rate of urinary trypsinogen-2 dipstick test rose from 72% to 94% (p=0.02). The results of urinary trypsinogen-2 dipstick test was positive in 14 of 15 patients with severe pancreatitis and 22 of 35 patients with mild pancreatitis according to the criteria by Atlanta International Symposium, 1992. Conclusions: Urinary trypsinogen-2 dipstick test is comparable to serum lipase in diagnosing acute pancreatitis. Delayed measurement and severe pancreatitis are more likely to yield positive results with urinary trypsinogen-2 dipstick test. Thus, we suggest that the cut-off value of urinary trypsinogen-2 dipstick test should be lowered to increase its sensitivity. (Korean J Gastro-enterol 2004;43:364-369)