Effect of Wearing Ankle Weights on Underwater Treadmill Walking

( Que Tae Park ),( Suk Bum Kim ),( David O Sullivan ) 한국운동역학회 2019 한국운동역학회지 Vol.29 No.2

Objective: The main purpose of this study was to investigate the effects of wearing an ankle weight belt while performing gait in water by focusing on the effect of using ankle weights have on the gait kinematics and the muscle activities for developing optimum training strategies. Method: A total of 10 healthy male university students were recruited for the study. Each participant was instructed to perform 3 gait conditions; normal walking over ground, walking in water chest height, and walking in water chest height while using ankle weights. All walking conditions were set at control speed of 4 km/h ± 0.05 km/h. The depth of the swimming pool was at 1.3 m, approximately chest height. The motion capture data was recorded using 6 digital cameras and the EMG was recorded using waterproof Mini Wave. From the motion capture data, the following variables were calculated for analysis; double and single support phase (s), swing phase (s), step length (%height), step rate (m/s), ankle, knee, and hip joint angles (°). From the electromyography the %RVC of the lower limb muscles medial gastrocnemius, rectus femoris, erector spinae, semitendinosus, tibialis anterior, vastus lateralis oblique was calculated. Results: The results show significant differences between the gait time, and step length between the right and left leg. Additionally, the joint angular velocities and gait velocity were significantly affected by the water resistance. As expected, the use of the ankle weights increased all of the lower leg maximum muscle activities except for the lower back muscle. Conclusion: In conclusion, the ankle weights can be shown to stimulate more muscle activity during walking in chest height water and therefore, may be useful for rehabilitation purposes.

Effect of Wearing Ankle Weights on Underwater Treadmill Walking

Park, Que Tae,Kim, Suk Bum,O'Sullivan, David Korean Society of Sport Biomechanics 2019 한국운동역학회지 Vol.29 No.2

Objective: The main purpose of this study was to investigate the effects of wearing an ankle weight belt while performing gait in water by focusing on the effect of using ankle weights have on the gait kinematics and the muscle activities for developing optimum training strategies. Method: A total of 10 healthy male university students were recruited for the study. Each participant was instructed to perform 3 gait conditions; normal walking over ground, walking in water chest height, and walking in water chest height while using ankle weights. All walking conditions were set at control speed of $4km/h{\pm}0.05km/h$. The depth of the swimming pool was at 1.3 m, approximately chest height. The motion capture data was recorded using 6 digital cameras and the EMG was recorded using waterproof Mini Wave. From the motion capture data, the following variables were calculated for analysis; double and single support phase (s), swing phase (s), step length (%height), step rate (m/s), ankle, knee, and hip joint angles ($^{\circ}$). From the electromyography the %RVC of the lower limb muscles medial gastrocnemius, rectus femoris, erector spinae, semitendinosus, tibialis anterior, vastus lateralis oblique was calculated. Results: The results show significant differences between the gait time, and step length between the right and left leg. Additionally, the joint angular velocities and gait velocity were significantly affected by the water resistance. As expected, the use of the ankle weights increased all of the lower leg maximum muscle activities except for the lower back muscle. Conclusion: In conclusion, the ankle weights can be shown to stimulate more muscle activity during walking in chest height water and therefore, may be useful for rehabilitation purposes.

Effects of Eyestalk Ablation on the Embryogenesis of Spider Crab , Libinia emarginata

Park, Mi Seon,Jo, Que Tae,Jeon, Im Gi,Hans Laufer 한국수산학회 1998 Fisheries and Aquatic Sciences Vol.1 No.2

Spider crabs, Libinia emarginata, were eyestalk-ablated unilaterally and bilaterally to manipulate endogenous methyl farnesoate (MF) to increase during the embryogenesis. Endogenous MF were measured weekly over the embryogenesis of the crab, using HPLC with the aids of GC/MS and MS database (CAS 010485-70-8) for the identification of the hormone. Initial MF titers both in the hemolymph and embryos of intact, control were at bottom levels and the hormone concentrations kept unchanged (p$lt;0.05), reflecting physiological unnecessaries of the hormone in the embryogenesis. Eyestalk ablation significantly stimulated the crabs to increase endogenous MF in both tissues (p$lt;0.01). In the response of the embryos to the increased MF, no growth stimulations were observed, at least, in the first part of embryogenesis. The increased mortalities and immature sheddings of embryos resulted from the crabs under the influence of elevated MF in both tissues, instead, suggesting that the elevated MF against the crab's requirement blocked the normal developmental process of the crab embryos. These data can give crustacean endocrinologists some insights to understand the effects of the hormone on the crustacean reproduction studied previously in which JH analogs ambiguously affected the crustacean reproduction depending on the reproductive stages. The data also can give shrimp aquaculturists some implication of a possible generation of unfavorable shrimp seeds attributed to elevated egg MF originated from their eyestalk-ablated mother shrimp.

제1형 신경섬유종증 환자에서 양측성으로 흉추에 발생한 신경섬유종 - 증례 보고 -

박석규,장재칠,도재원,김범태,신원한,최순관,변박장,이만복,고은석 대한신경외과학회 1999 Journal of Korean neurosurgical society Vol.28 No.1

중뇌동맥 경색증 환자에서 감압개두술의 적응증

박석규,윤일규,김범태,도재원,배학근,이경석,최순관,변박장 대한신경외과학회 1999 Journal of Korean neurosurgical society Vol.28 No.11

Standards for Endovascular Neurosurgical Training and Certification of the Society of Korean Endovascular Neurosurgeons 2013

Shin, Dong-Seong,Park, Sukh-Que,Kang, Hyun-Seung,Yoon, Seok-Mann,Cho, Jae-Hoon,Lim, Dong-Jun,Baik, Min-Woo,Kwon, O Ki,Kim, Bum-Tae The Korean Neurosurgical Society 2014 Journal of Korean neurosurgical society Vol.55 No.3

The need for standard endovascular neurosurgical (ENS) training programs and certification in Korea cannot be overlooked due to the increasing number of ENS specialists and the expanding ENS field. The Society of Korean Endovascular Neurosurgeons (SKEN) Certification Committee has prepared training programs and certification since 2010, and the first certificates were issued in 2013. A task force team (TFT) was organized in August 2010 to develop training programs and certification. TFT members researched programs and systems in other countries to develop a program that best suited Korea. After 2 years, a rough draft of the ENS training and certification regulations were prepared, and the standard training program title was decided. The SKEN Certification Committee made an official announcement about the certification program in March 2013. The final certification regulations comprised three major parts: certified endovascular neurosurgeons (EN), certified ENS institutions, and certified ENS training institutions. Applications have been evaluated and the results were announced in June 2013 as follows: 126 members received EN certification and 55 hospitals became ENS-certified institutions. The SKEN has established standard ENS training programs together with a certification system, and it is expected that they will advance the field of ENS to enhance public health and safety in Korea.

근파워 웨이트 트레이닝에 대한 수영능력 변화 양상

李潤根,朴奎泰 중앙대학교 스포츠과학연구소 1995 體育硏究 Vol.- No.8

The purpose of this study was to investigate the effect of swimming weight Training and weight training program for the improvement of swimming ability. The subjects of this study were selected of each 10males in swimming weight training group (SWTG) and swimming training group (STG), which was performed SWTG & STG for 6week (3days / week, somin / day) Change in swimming record & muscle strength betweem swimming weight training group and swimming training group were analyized and compared. There results were as follow : 1. The ability of Free Style Swimming. Within SWTG and STG were significant decrease 25m C, 25m K, 25m P, 50m K, 50m P(_p,0.05), but Between SWTG were significant increase 25m K, 25m P, 50m P(_p,0.05) 2. Muscle strength. Within SWTG were significant increase L/R muscle strength vs L/R shoulder strenght, L/R, arm strength, L/R grip strength, L/R leg strenght, L/R knee strength, and Back strerght(_p,0.05), and STG were significant in crease L/R shoulder strenght, L/R arm strength, L/R grip strangth, L/R knee strength, L/R leg strength, and Back strength(_p,0.05).

재구성 스위칭 매트릭스와 에러 보정회로를 포함한 4×4 다중 포트 증폭 시스템

이한림(Han Lim Lee),박동훈(Dong-Hoon Park),이원석(Won-Seok Lee),강승태(Seung-Tae Khang),이문규(Moon-Que Lee),유종원(Jong-Won Yu) 한국전자파학회 2014 한국전자파학회논문지 Vol.25 No.6

본 논문에서는 재구성 가능한 스위칭 매트릭스와 위상 및 진폭 에러 보정회로를 포함하는 새로운 구조의 4×4 다중 포트 증폭(MPA) 시스템을 제안한다. 제안하는 재구성 스위칭 매트릭스는 MPA 시스템의 입출력 하이브리드 매트릭스 회로로 사용되며, 스위칭 매트릭스의 스위치 모드 조절을 통해 신호의 증폭에 사용될 증폭기의 개수 및 신호의 출력 방향, 출력 크기를 유동적으로 조절할 수 있다. 또한, 제안하는 MPA 시스템은 증폭기간의 위상 및 이득 오차를 최소화하기 위한 보정 회로를 포함하여, 각각의 신호 경로에 이상적인 위상 및 진폭 밸런스를 만들 수 있기에 MPA 최종 출력단의 포트간 격리도를 향상시키게 된다. This paper presents a new 4×4 multi-port amplifier(MPA) structure using reconfigurable switching matrices as input and output hybrid matrices(IHM, OHM), and phase/amplitude error calibration circuits. According to the mode selection of the switches, output power can be flexibly and effectively managed since the number of PA’s to be used and the number of output port to distribute/combine amplified signals can be controlled. In addition, the proposed structure contains the phase and amplitude error calibration block that helps produce identical amplitudes and desired phase differences to the 4×4 OHM, resulting in optimizing the port-to-port isolation of the MPA system.

Safety and Efficacy of Flow Diverter Therapy for Unruptured Intracranial Aneurysm Compared to Traditional Endovascular Strategy : A Multi-Center, Randomized, Open-Label Trial

Kim, Junhyung,Hwang, Gyojun,Kim, Bum-Tae,Park, Sukh Que,Oh, Jae Sang,Ban, Seung Pil,Kwon, O-Ki,Chung, Joonho,Committee of Multicenter Research, Korean Neuroendovascular Society, The Korean Neurosurgical Society 2022 Journal of Korean neurosurgical society Vol.65 No.6

Objective : Endovascular treatment of large, wide-necked intracranial aneurysms by coil embolization is often complicated by low rates of complete occlusion and high rates of recurrence. A flow diverter device has been shown to be safe and effective for the treatment of not only large and giant unruptured aneurysms, but small and medium aneurysms. However, in Korea, its use has only recently been approved for aneurysms <10 mm. This study aims to compare the safety and efficacy of flow diversion and coil embolization for the treatment of unruptured aneurysms ≥7 mm. Methods : The participants will include patients aged between 19 and 75 years to be treated for unruptured cerebral aneurysms ≥7 mm for the first time or for recurrent aneurysms after initial endovascular coil embolization. Participants assigned to a flow diversion cohort will be treated using any of the following devices : Pipeline Flex Embolization Device with Shield Technology (Medtronic, Minneapolis, MN, USA), Surpass Evolve (Stryker Neurovascular, Fremont, CA, USA), and FRED or FRED Jr. (MicroVention, Tustin, CA, USA). Participants assigned to a coil embolization cohort will undergo traditional endovascular coiling. The primary endpoint will be complete occlusion confirmed by cerebral angiography at 12 months after treatment. Secondary safety outcomes will evaluate periprocedural and post-procedural complications for up to 12 months. Results : The trial will begin enrollment in 2022, and clinical data will be available after enrollment and follow-up. Conclusion : This article describes the aim and design of a multi-center, randomized, open-label trial to compare the safety and efficacy of flow diversion versus traditional endovascular treatment for unruptured cerebral aneurysms ≥7 mm.

The Efficacy of P2Y12 Reactive Unit to Predict the Periprocedural Thromboembolic and Hemorrhagic Complications According to Clopidogrel Responsiveness and Safety of Modification of Dual Antiplatelet Therapy : A Meta-Analysis

Kim, Hyun Jung,Oh, Jae Sang,Park, Sukh Que,Yoon, Seok Mann,Ahn, Hyeong Sik,Kim, Bum Tae The Korean Neurosurgical Society 2020 Journal of Korean neurosurgical society Vol.63 No.5

The efficacy of P2Y12 reaction unit (PRU) of VerifyNow still remains as a controversial issue in neurointervention. So we investigated the usefulness of PRU of VerifyNow to predict the peri-procedural thromboembolic events (TE) and hemorrhagic events (HE). And we evaluated the safety of modified dual antiplatelet therapy (DAPT) or triple antiplatelet therapy (TAPT) for clopidogrel hyporesponders. We searched MEDLINE, EMBASE, the Cochrane Central Register of Controlled Trials, Web of Science and Scopus on August 19 2018. Data was collected the 1) incidence of TE between clopidogrel responder and clopidogrel hypo-responder, 2) incidence of HE between clopidogrel hyper-responder and clopidogrel responder and hypo-responder, and 3) incidence of TE and HE between modified DAPT or TAPT and standard DAPT in clopidogrel hypo-responder. High cut-off value of PRU was defined as PRU >40% or <220. Fifteen studies were enrolled. Clopidogrel responder showed lower incidence of TE than hypo-responder (risk ratio [RR], 0.32; 95% confidence interval [CI], 0.17-0.61; p<0.001). With the high cut-off value of PRU, clopidogrel responder showed more lower incidence of TE than hypo-responder (RR, 0.11; 95% CI, 0.02-0.45; p=0.002). The incidence of periprocedural HE have higher on clopidogrel hyper-responder than clopidogrel responder and hypo-responder (RR, 4.26; 95% CI, 1.10-16.44; p=0.04; I²=66%). The incidence of periprocedural TE after changing regimen of DAPT for clopidogrel hypo-responder have a tendency to reduce, but there was no significant difference between modified DAPT or TAPT group and standard DAPT group (p>0.05). The incidence of periprocedural HE after changing regimen of DAPT for clopidogrel hypo-responder was no significant difference between modified DAPT or TAPT group and standard DAPT group (p>0.05). PRU is a useful tool as a predictor of peri-procedural TE or HE on neurointervention. PRU has a threshold effect of cut-off value to predict the peri-procedural TE. Modified DAPT or TAPT to prevent TE in clopidogrel hypo-responders could not reduce the incidence of TE. We should investigate the further research about modification of regiment on neurointervention.