인공지능형 스마트공장 데이터셋 구축 방법에 관한 연구

박윤수,이상덕,최정훈,Park, Youn-Soo,Lee, Sang-Deok,Choi, Jeong-Hun 한국인터넷방송통신학회 2021 한국인터넷방송통신학회 논문지 Vol.21 No.5

At the manufacturing site, workers have been operating by inputting materials into the manufacturing process and leaving input records according to the work instructions, but product LOT tracking has been not possible due to many omissions. Recently, it is being carried out as a system to automatically input materials using RFID-Tag. In particular, the initial automatic recognition rate was good at 97 percent by automatically generating input information through RACK (TAG) ID and RACK input time analysis, but the automatic recognition rate continues to decrease due to multi-material RACK, TAG loss, and new product input issues. It is expected that it will contribute to increasing speed and yield (normal product ratio) in the overall production process by improving automatic recognition rate and real-time monitoring through the establishment of artificial intelligent smart factory datasets. 제조현장에서 작업자는 작업 지시서에 따라 제조 공정에 소재를 투입하고 투입 기록을 남기는 방식으로 운영해왔으나, 누락하는 경우가 많아 제품 LOT 추적이 안되는 경우가 발생하고 있었으며, 최근 스마트공장 구축으로 RFID-Tag를 활용하여 소재 투입 정보를 자동입력 하는 시스템으로 진행되고 있다. 특히, 생산라인에 투입되는 RACK에 부착된 TAG 정보를 수신하여 RACK(TAG) ID와 RACK 투입시간 데이터 분석을 통한 투입정보를 자동으로 생성토록 하여 초기 자동인식률이 97%로 양호하였으나 멀티소재 사용 RACK, TAG분실, 신규 제품 투입 이슈 등이 발생하면서 자동인식률이 계속 낮아지는 상황이다. 인공지능형 스마트공장 데이터셋 구축 방법은 자동인식률 향상과 실시간 모니터링이 가능해지므로 생산 공정의 전반에 있어 속도와 수율(정상제품 비율)을 높이는데 기여할 것으로 기대한다.

시멘트를 사용한 TITANIUM 인공 대퇴삽입물의 5-8년 추시결과

박윤수,Hugh U. Cameron (Youn Soo Park) 대한고관절학회 1995 Hip and Pelvis Vol.7 No.2

The objective was to determine if titanium(Ti) alloy was a suitable material for a cemented titanium femoral stem. Secondary objectives were to examine the effects of stem position and offset. Two hundred and thirty-eight cases of the hip were treated with a heavy cemented Ti alloy stem. These cases have been followed for 5-8years. They were rated clinically with a Harris hip score and radiologically after the fashion of Gruen. Twenty-eight patients died at less than 5 years and 12 were lost to follow-up. Sixty-one cases were hip revisions and were thus considered separately as were 27 primary cases with a smooth threaded acetabular component. Of the 129 primary cases with a cemented acetabular component, only 1 case required revision and this was for acetabular loosening only. The Harris hip rating for the others was 75.8% excellent, 18.7% good, 2,3% fair and 3.2% poor. Radiologic rating was high grade (4 zones) in 1 bilateral case and low grade in 7.7%, mainly single zone. Varus or valgus insertion did not influence outcome, nor did plug placement or stem offset. It is concluded that with appropriate stem design li alloy is a suitable material for cemented total hip replacement.

노인환자의 대퇴경부 골절에 대한 양극성 반 치환술과 고관절 전 치환술의 비교

박윤수 ( Youn Soo Park ),박영근 ( Young Keun Park ),윤상학 ( Sang Hack Youn ) 대한고관절학회 1998 Hip and Pelvis Vol.10 No.2

We compared the clinical and radiological results of bipolar hemiarthroplasty (BH) and total hip arthroplasty (THA) by analyzing 50 cases (25- BH, 25 -THA) of femur neck fracture (sex ratio M/F: 8/17; av.age 74/70yrs). The mean folloup period was 28months (24-39months). At the last follow- up, Harris hip score (HHS) was 84 (25-100) in BH and 91(82-100) in THA. In preop. activities of the daily living (ADL), 10 cases were in grade 1 (40%), 9 (36%) in grade 2, 4 (16%) in grade 3, 2 (8%) in grade 4 and none in grade 5 of the BH gruop; 19 cases (76%) in grade 1, 5 (20%) in grade 2, 1 (4%) in grade 3 and none in grade 4 and 5 of the THA group. In postop. ADL, there were 1 case (4%) in grade 1, 12 (48%) in grade 2, 10 (40%) in grade 3, 2 (8%) in grade 4 and none in grade 5 of the BH group; and 15 cases (60%) in grade 1, 8 (32%) in grade 2, 2 (8%) in grade 3 and none in grade 4 and 5 of the THA group. Postoperative deterioration of ADL more than one grade was observed in 12 cases (48%) of the BH and 4 cases (16%) of the THA. The average walking aids period was 23months (1.5~38) in BH and 2.3months (1.5~3) in THA. In the radiological results, nonprogressive loosening findings were noticed in 2 cases of BH only and they were observed without any intervention because of the excellent clinical results without pain. There were no significant differences in the complication rates and the postop. morbidity and mortality rates between the two groups.

양측성 인공 고관절 전 치환술을 동시에 시술한 군과 단계적으로 시술한 군의 비교 추시 결과

박윤수 ( Youn Soo Park ),박영근 ( Young Keun Park ),최희준 ( Hee Joon Choi ) 대한고관절학회 1998 Hip and Pelvis Vol.10 No.2

Between October 1994 and May 1997, 40 patients(80hips) underwent bilateral total hip replacement arthroplasty(THRA). Of these, 15 patients underwent one stage procedure and the remaining 29 patients two stage procedure. We divided the patients into three groups: group A(one- stage procedure) surgeries performed simultaneously(30 hips); group B(two-stage procedure) surgeries performed less than 10 days apart(22 hips); group C(two-stage procedure) - surgeries performed more than 3 months apart(28 hips). The follow up period ranged from 16 to 45 months(average 33 months). All the acetabular cups were fixed without cement. Cementless stems were performed in 64 hips and cemented in 16 hips. All the patients were permitted early weight bearing as soon as the pain subsided. There were no statistically significant differences in demographics, operation time, postoperative hemovac drainage, postoperative pain, postoperative mobility and postoperative complications among the three groups. However, group A had lesser postoperative hospital stay, postoperative disability period and hospital cost than those of groups B and C. Total transfusion amount was least in group C. The period between the operation and walking with weight-bearing was shorter in group C than those in groups A and B. In functional evaluations, there were no significant differences among the 3 groups(average Harris Hip Score: group A, 95; group B, 93; group C, 92). These results showed that one stage bilateral THRA could be performed safely and effectively with less hospital stay and cost without differences in the complications and functional results. Moreover, early weight bearing of cementless bilateral THRA did not affect the final outcome in early follow up periods.

S-ROM Modular 대퇴스템을 이용한 고관절 전치환술 -추시기간 2년 이상, 예비보고-

박윤수 ( Youn Soo Park ),이승림 ( Seung Rim Yi ),문상호 ( Sang Ho Moon ) 대한고관절학회 1997 Hip and Pelvis Vol.9 No.1

Though cementless femoral stems are now widely used, differences in the individuals size or bone characteristics still make it difficult to find an exact patient-prosthetic match. In order to maximize prosthetic fitting, the S-ROM Modular System (Joint Medical Product, Stamford, CT) uses a Sleeve which attempts to prevent any compromising of the proximal femoral configuration during total hip arthroplasty and also has Flute and Clothespin characteristics which allow the fixation with rotational stability and flexibility. Twenty four total hip replacement cases in 23 patients, received between Oct. 1994 and Apr. 1995, were divided into three groups based on scores from the Canal Flair Index to observe the versatility of the system in femurs. Results indicated that patients of all three groups did not have any significant complications or immediate post-operative mechanical failures. Furthermore, the Harris scores increased similarly for all three groups and there were no comparative differences during the follow-ups. If cementless femoral fixation is indicated, the S-ROM Modular System can be safely used with wide margins of anatomic variation of proximal femur, but it needs further long term follow-up with more cases.

고관절 전치환술에서의 금속-금속 관절면

박윤수 ( Youn Soo Park ),임승재 ( Seung Jae Lim ) 대한고관절학회 2010 Hip and Pelvis Vol.22 No.3

Metal-on-metal bearings have been reintroduced with the improved materials, design and manufacturing quality control as an alternative to the conventional metal-on-polyethylene articulation. The advantages of total hip arthroplasty using a metal-on-metal bearing include an extremely low wear rate, a very small risk of in vivo fracture and the use of a larger femoral head. These advantages have led to an increased use of metal-on-metal bearings for younger and more active patients with advanced hip disease. Concerns remain regarding the elevated levels of metal ions and their potential consequences such as metal hypersensitivity or potential carcinogenesis.

대퇴골두 무혈성괴사의 동통에 관한 분석 -동통과 방사선학적 소견과의 통계적 상관관계-

박윤수 ( Youn Soo Park ),이승림 ( Seung Rim Yi ),오원환 ( Won H. Oh ),안중모 ( Joong Mo Ahn ) 대한고관절학회 1997 Hip and Pelvis Vol.9 No.1

The characteristics of hip pain in avascular necrosis of the femoral head is difficult to assess objectively, and not well described according to each stages of disease. This study was undertaken to determine whether a correlation exists between specific pain characteristics and radiological findings including collapsed pattern, joint effusion, synovial hyperplasia etc. One hundred and nine hips in 77 patients were clinically classified according to the severity of pain that was based on the objective numeric scales(0 - 10), and the characteristics of pain were subdivided into location, nature, severity, joint motion, time, pattern, other aggravating factor and etc. The pain natures were compared with the findings on simple radiographs and MRIs. The amount of joint effusion and synovial thickening were measured on serial cut of MRIs(lesser trochanteric, center of femoral neck and greater trochanteric level) by our grading. The clinical studies have shown that the severity of pain in Ficat stage IIA(Ave. 6.0) was similar to that in stage IIB(Ave. 6.8), m(Ave. 6.4) anl IV(Ave. 6.9). Patients in Ficat stage IIA complained sharp, buttock pain associated with initial motion. Bone marrow edema was more observed in later stages on MRL Effusion and synovial thickening of the hip joint were rather significant in later stages without change of the severity of pain. In statistical analysis, there was a clear relationship between the size of lesions and both joint effusion and synovial thickening. The severity scores correlated significantly with joint effusion and synovial thickening. Hence we concluded that the patients pain characteristics could aid in the evaluation of the disease status.

감압술이 실패한 대퇴골두 무혈성 괴사의 병리적 소견

박윤수(Youn Soo Park),오원환(Won H. Oh),이승림(Seung Rim Yi),박민종(Min Jong Park),서연림(Yeon Lim Suh) 대한정형외과학회 1997 대한정형외과학회지 Vol.32 No.3

대퇴골두 무혈성 괴사에 시행한 핵심 감압술 및 압박 골이식술

박윤수(Youn Soo Park),이승림(Seung Rim Yi),박영근(Young Keun Park),윤상학(Sang Hak Yun) 대한정형외과학회 1999 대한정형외과학회지 Vol.34 No.2

세라믹-세라믹 관절면을 이용한 인공 고관절 치환술

박윤수 ( Youn Soo Park ),임승재 ( Seung Jae Lim ) 대한고관절학회 2007 Hip and Pelvis Vol.19 No.3