감성 커뮤니케이션을 위한 오픈사전 앱 개발

조훈기(Hun Gi Jo),이건훈(Geon Hun Lee),최영완(Yeong Wan Choi),김지심(Ji Sim Kim),김경아(Kyong Ah Kim),안유정(You Jung Ahn) 한국컴퓨터정보학회 2019 한국컴퓨터정보학회 학술발표논문집 Vol.27 No.1

한국인의 종골 크기

김진수,조훈기,황새민,이근우,양기원,이경태,Kim, Jin-Su,Cho, Hun-Ki,Hwang, Sae-Min,Lee, Keun-Woo,Young, Ki-Won,Lee, Kyung-Tai 대한족부족관절학회 2013 대한족부족관절학회지 Vol.17 No.2

Purpose: Open reduction and internal fixation of calcaneal fracture using plate has been used. While numerous plates have been manufactured, most of the conventional plates are designed for westerners, realistically the size is larger for Korean. The domestic products, on the other hand, often have the undesirable screw holes and path. Therefore, we measured the radiologic parameter of Korean calcaneus for providing the plate and screw hole placements. Materials and Methods: We measured the outer lines and angles with over the 20 years old 291 females and 322 males. A: Length of inferior plane of calcaneus, B: Length of anterior plane of calcaneus, C: Length from line A to sinus tarsi, D: Length from line A to posterior point of posterior facet, E: Length from line A to calcaneal tuberosity, F: Length of posterior facet, G: Length from anterior point of line A to C, H: Length from line C to line D, a: Angle between A and B, b: Gissane angle, c: Bohler angle, d: Calcaneal pitch angle using Marosis m-view$^{(R)}$. Results: Mean A, B, C, D, E, F, G, H were 63.6, 26.4, 23.2, 43.7, 40.5, 26.9, 12.8, 18.1 mm. Mean a, b, c, d angle were 105.8, 122.4, 32.4, $20.5^{\circ}$. Male's calcaneus is significantly bigger than female's (p<0.001). Conclusion: AP calcaneus length 63.6 mm, maximal height 43.7 mm is considered to be helpful in making the Korean calcaneal plate.

Biomechanical Comparison Study of Three Fixation Methods for Proximal Chevron Osteotomy of the First Metatarsal in Hallux Valgus

김진수,조훈기,영기원,김지수,이경태 대한정형외과학회 2017 Clinics in Orthopedic Surgery Vol.9 No.4

Background: Fixation of proximal chevron metatarsal osteotomy has been accomplished using K-wires traditionally and with a locking plate recently. However, both methods have many disadvantages. Hence, we developed an intramedullary fixation technique using headless cannulated screws and conducted a biomechanical study to evaluate the superiority of the technique to Kwire and locking plate fixations. Methods: Proximal chevron metatarsal osteotomy was performed on 30 synthetic metatarsal models using three fixation techniques. Specimens in group I were fixated with K-wires (1.6 mm × 2) and in group II with headless cannulated screws (3.0 mm × 2) distally through the intramedullary canal. Specimens in group III were fixated with a locking X-shaped plate (1.3-mm thick) and screws (2.5 mm × 4). Eight metatarsal specimens were selected from each group for walking fatigue test. Bending stiffness and dorsal angulation were measured by 1,000 repetitions of a cantilever bending protocol in a plantar to dorsal direction. The remaining two samples from each group were subjected to 5 mm per minute axial loading to assess the maximal loading tolerance. Results: All samples in group I failed walking fatigue test while group II and group III tolerated the walking fatigue test. Group II showed greater resistance to bending force and smaller dorsal angulation than group III (p = 0.001). On the axial loading test, group I and group II demonstrated superior maximum tolerance to group III (54.8 N vs. 47.2 N vs. 28.3 N). Conclusions: Authors have demonstrated proximal chevron metatarsal osteotomy with intramedullary screw fixation provides superior biomechanical stability to locking plate and K-wire fixations. The new technique using intramedullary screw fixation can offer robust fixation and may lead to better outcomes in surgical treatment of hallux valgus.

승용 디젤엔진용 가변과급기 성능에 관한 연구

진영욱,정진은,조훈기,강우,정재우 한국기술교육대학교 2006 論文集 Vol.13 No.1

A test bench which is consisted of roots blower, air flow meter, driving unit for VGT actuator, transmitters for temperature and pressure, and the rotational speed sensor was developed to evaluate the characteristics of the VGT system. Measurements using VGT of the 2.0 L diesel engine were carried out. The corrected mass flow rate and the pressure ratio for the compressor of the VGT are related directly with the rotational speed, but they are independent of the rack position of the VGT. The pressure ratio and the corrected mass flow rate of the turbine of the VGT are related directly with the rack position of the VGT, but they don't have any relation with the rotational speed. The mechanical efficiency of the VGT is higher than the conventional turbocharger in the wide range. The efficiency at the 0.03 kg/s of the mass flow rate is 4.36 times as high as that of the conventional turbocharger. These data will be used to develop the new engine equipped with the VGT system.

Paratrooper’s Ankle Fracture: Posterior Malleolar Fracture

기원영,김진수,조재호,김형석,조훈기,이경태 대한정형외과학회 2015 Clinics in Orthopedic Surgery Vol.7 No.1

Background: We assessed the frequency and types of ankle fractures that frequently occur during parachute landings of specialoperation unit personnel and analyzed the causes. Methods: Fifty-six members of the special force brigade of the military who had sustained ankle fractures during parachute landingsbetween January 2005 and April 2010 were retrospectively analyzed. The injury sites and fracture sites were identified andthe fracture types were categorized by the Lauge-Hansen and Weber classifications. Follow-up surveys were performed with respectto the American Orthopedic Foot and Ankle Society ankle-hindfoot score, patient satisfaction, and return to preinjury activity. Results: The patients were all males with a mean age of 23.6 years. There were 28 right and 28 left ankle fractures. Twenty-twopatients had simple fractures and 34 patients had comminuted fractures. The average number of injury and fractures sites perperson was 2.07 (116 injuries including a syndesmosis injury and a deltoid injury) and 1.75 (98 fracture sites), respectively. Twentythreecases (41.07%) were accompanied by posterior malleolar fractures. Fifty-five patients underwent surgery; of these, 30 hadplate internal fixations. Weber type A, B, and C fractures were found in 4, 38, and 14 cases, respectively. Based on the Lauge-Hansen classification, supination-external rotation injuries were found in 20 cases, supination-adduction injuries in 22 cases, pronation-external rotation injuries in 11 cases, tibiofibular fractures in 2 cases, and simple medial malleolar fractures in 2 cases. Themean follow-up period was 23.8 months, and the average follow-up American Orthopedic Foot and Ankle Society ankle-hindfootscore was 85.42. Forty-five patients (80.36%) reported excellent or good satisfaction with the outcome. Conclusions: Posterior malleolar fractures occurred in 41.07% of ankle fractures sustained in parachute landings. Because mostof the ankle fractures in parachute injuries were compound fractures, most cases had to undergo surgical repairs.

종골 분쇄 골절 후 장족지 굴곡건 유착에 의해 발생한 Checkrein 변형: 증례 보고

김진수,이한상,양기원,이근우,조훈기,이상영,Kim, Jin Su,Lee, Han Sang,Young, Ki Won,Lee, Keun Woo,Cho, Hun Ki,Lee, Sang Young 대한족부족관절학회 2015 대한족부족관절학회지 Vol.19 No.1

The checkrein deformity describes tethering of the flexor hallucis longus tendon, which mainly occurs after fracture of the distal tibia. The deformity increases with dorsiflexion of the ankle and decreases or disappears with plantarflexion of the ankle. In some cases, the deformity may occasionally include the second and third toes. In the current study, the authors experienced secondary checkrein deformity of all lesser toes after open reduction and plate fixation for comminuted fracture of the calcaneus. As a treatment, plate and screws were removed, followed by an additional medial incision which showed a partially ruptured flexor digitorum longus tendon with severe adhesion. Resection of the adhesed tendon and tenodesis of its distal portion to the flexor hallucis longus was performed for correction of the checkrein deformity. Then the lessor toe checkrein deformity recovered immediately. The authors report on this rare lessor toe checkrein deformity after calcaneal fracture fixation with a review of literature.

가변형 터보과급기의 맥동 유동 성능 측정 시스템 개발

정진은(Jin Eun Chung),진영욱(Youngwook Jin),조훈기(Hungi-Cho),강우(Woo Kang),정재우(Jae Woo Chung) 한국자동차공학회 2007 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-

A test bench which is consisted of roots blower, pulsator, air flow meter, driving unit for VGT actuator, transmitters for temperature and pressure, and the rotational speed sensor was developed to evaluate the characteristics of the VGT system. Measurements using VGT of the 2.0 L diesel engine were carried out. The corrected mass flow rate and the pressure ratio for the compressor of the VGT are related directly with the rotational speed, but they are independent of the rack position of the VGT. The pressure ratio and the corrected mass flow rate of the turbine of the VGT are related directly with the rack position of the VGT, but they don’t have any relation with the rotational speed. The mechanical efficiency of the VGT is higher than the conventional turbocharger in the wide range. The efficiency at the 0.03 kg/s of the mass flow rate is 4.36 times as high as that of the conventional turbocharger. These data will be used to develop the new engine equipped with the VGT system.

소형 디젤엔진용 가변 과급기 특성에 관한 연구

정진은(Jin-Eun Chung),진영욱(Youngwook Jin),조훈기(Hunki Cho),강우(Woo Kang),정재우(Jae-Woo Chung),강정호(Jeong-Ho Kang) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

A test bench which is consisted of roots blower, air flow meter, driving unit for VGT actuator, transmitters for temperature and pressure, and the rotational speed sensor was developed to evaluate the characteristics of the VGT system. Measurements using VGT of the 2.0 L diesel engine were carried out. The corrected mass flow rate and the pressure ratio for the compressor of the VGT are related directly with the rotational speed, but they are independent of the rack position of the VGT. The pressure ratio and the corrected mass flow rate of the turbine of the VGT are related directly with the rack position of the VGT, but they don't have any relation with the rotational speed. The mechanical efficiency of the VGT is higher than the conventional turbocharger in the wide range. The efficiency of the VGT at the 0.03 ㎏/s of the mass flow rate is 4.36 times as high as that of the conventional turbocharger. These data will be used to develop the new engine equipped with the VGT system.

군인의 발목 외상 중 후송 기준에 대한 고찰

김대곤 ( Kim Dae Kon ),이태연 ( Lee Tae Yeon ),조민수 ( Jo Min Su ),조훈기 ( Jo Hoon Ki ),하재홍 ( Ha Jae Hong ),정현호 ( Jung Heon Ho ),이정엽 ( Lee Jung Yup ) 국군의무사령부 2017 대한군진의학학술지 Vol.48 No.1

Objectives: The purpose of the study is to analyze the patients visiting emergency room because of ankle injuries to check the efficiency of current evacuation system. Methods: Medical records of the patients from June 2016 to November 2016 were analyzed retrospectively to find out the necessity of emergent treatment. The average duration of off-duty period according to severity of ankle sprain was further investigated by using SPSS 23 for statistical analysis. Results: Total 47 patients visited ER because of ankle injury during study period. Mean age was 22.55±3.26. The number of patient rank was Private 6(12.7%), Private first class 20(42.6%), Corporal 13(27.7%), Sergeant 5(10.6%), Sergeant first class 1(2.1%), Second lieutenant 1(2.1%), Major 1(2.1%) retrospectively. The cause of ankle injury was Futsal 21(44.7%), Soccer 10(21.3%), Run 6(12.8%), Etc. 4(8.5%), Foot volleyball 3(6.4%), Basketball 3(6.4%), retrospectively. Final diagnosis was sprain 41(87.2%), fracture 4(8.5%), dislocation 2(4.3) retrospectively. The grade of ankle sprain was I 1(2.1%), II 5(10.6%), III 41(87.2%) retrospectively. T-test, chi-squrare test and Fisher s exact test was done for dislocation which needed emergent treatment. However, none of the variant showed statistical significance. The average duration of off-duty period according to severity of ankle sprain was 5.66±0.88 weeks. Conclusions: This study can proviae medical information to military commanders for making selective and focused evacuation decision of ankle sprain injury patients. Thus, more effective evacuation system can minimize loss of military force.