• The Journal of Korean Physical Therapy
• /
• 제28권3호
• /
• pp.195-200
• /
• 2016

Purpose: This study was designed to evaluate the effects of the different condition of leg support surface on the upper extremity and core muscle activity during the push-up exercise. Methods: Fifteen healthy subjects that were practicable push-ups were recruited in this study. Subjects were instructed the push-up exercise in the different condition of the leg support surface. Each condition of support surface was set to the high and lower, and the unstable and stable condition. Muscle activation was measured by using the surface electromyography (EMG), and recorded from the triceps brachii, serratus anterior, latissimus dorsi, rectus abdominis, abdominal external oblique, and erector spinea muscle. Results: In the results of experiments, there was no significant difference of muscle activation in upper extremity between the high unstable and high stable support surface. By contrast, muscle activation of the rectus abdominis and abdominal external oblique was significantly higher in the low unstable support surface, compared with those of the low stable support surface. It is well known that the core muscle was important to stabilization of trunk stability. Conclusion: This result demonstrates that the low and unstable support surface for the lower extremity was suited for training of core muscle for trunk stabilization during the push-up exercise.

• PNF and Movement
• /
• 제12권1호
• /
• pp.39-43
• /
• 2014

Purpose: This study was to examine lateral abdominal muscle activation during maximum expiration exercise between healthy and chronic low back pain(CLBP) patients. Methods: The subjects were 16 CLBP patients and 16 healthy people between the ages of 22 and 53. The thickness of the abdominal muscles was measured using ultrasonography(LOGIQ Book XP, GE, USA). We instructed the subjects how to perform the exercises and measured changes in thickness of the transversus abdominis(TrA) and internal oblique(IO) muscles during the maximum expiration. The main outcome variables were the ratios of the TrA and IO thickness during the exercise versus in the relaxed position(TrA and IO activation ratios). Results: There were significant differences between CLBP patients and healthy subjects for TrA in the relaxed position. However there was no difference in the ratio of change in the muscle activity(TrA, IO). Conclusion: These findings, CLBP patients exhibited atrophy of the TrA muscle, but voluntary TrA muscle activation was similar to that of the normal subjects. Therefore, this exercise could be used during core strengthening in CLBP patients.

• The Plant Pathology Journal
• /
• 제31권2호
• /
• pp.192-194
• /
• 2015

Pathogen-associated molecular patterns (PAMPs) activate mitogen-activated protein kinases (MAPKs), essential components of plant defense signaling. Salicylic acid (SA) is also central to plant resistance responses, but its specific role in regulation of MAPK activation is not completely defined. We have investigated the role of SA in PAMP-triggered MAPKs pathways in Arabidopsis SA-related mutants, specifically in the flg22-triggered activation of MPK3 and MPK6. cim6, sid2, and npr1 mutants exhibited wild-type-like flg22-triggered MAPKs activation, suggesting that impairment of SA signaling has no effect on the flg22-triggered MAPKs activation. Pretreatment with low concentrations of SA enhanced flg22-induced MPK3 and MPK6 activation in all seedlings except npr1, indicating that NPR1 is involved in SA-mediated priming that enhanced flg22-induced MAPKs activation.

• 한국의류산업학회지
• /
• 제10권3호
• /
• pp.394-398
• /
• 2008

One of barely water soluble ketones, acetophenone (AP) was dissolved in methanol and then was mixed with aqueous solution of C. I. Red Acid 114. In order to find out the role of AP in the dyeing process the rate constants and the activation parameters were calculated. The rate for the dyeing with AP was faster than that without it. Because of the reduced temperature dependence by AP the activation energy ($E_a$) for the dyeing with AP was smaller than that without it. With increasing temperature the activation enthalpy (${\Delta}H^*$), the activation entropy (${\Delta}S^*$), and the activation free energy ($G^*$) decreased, which was more noticeable in dyeing with AP. The rate constants and the activation parameters agreed well with the results from the previous reports that the ability of AP to increase disaggregation of dye molecules, loosening the wool fiber, and wickabilty of dyeing solution made it possible to dye wool fiber at low temperature.

• 한국운동역학회지
• /
• 제19권2호
• /
• pp.237-244
• /
• 2009

본 연구는 처네를 사용하고 보행을 하는 동안 처네의 사용 방법에 따른 족저 압력의 변화와 목, 허리 및 다리 근육의 활성도를 알아 보기 위하여 실시하였으며 이를 위하여 족저 영역별 최고 압력과 근육 활성도를 중심으로 자료를 수집하여 분석하였다. 영아를 양육하고 있는 허리와 다리 및 목의 근골격계 문제가 없는 20명의 건강한 젊은 여성을 대상으로 전방 처네 사용, 후방 처네 사용, 일반 보행을 하는 동안 입각기 발의 영역별 족저 최고 압력과 목, 허리 및 다리 근육의 활성도를 측정하였다. 족저 압력의 측정은 RS-scan system을 이용하였으며, 근육 활성도는 ProComp InfinitiTM를 이용하였다. 처네 사용 방법에 따라 수집된 자료를 일원배치분산분석을 이용하여 분석하였다. 본 연구를 통하여 전방 처네 사용 시 허리 근육의 활성도와 엄지 발가락 영역의 압력이 유의하게 증가한다는 것을 알 수 있었고, 후방 처네 사용 시 목 근육의 활성도와 발허리 영역의 압력이 유의하게 증가하였다. 따라서 본 연구에서는 처네의 사용 방법이 발의 구조와 기능 그리고 근육 활성도에 영향을 미친다는 것을 확인 할 수 있었다.

• 대한인간공학회지
• /
• 제28권1호
• /
• pp.1-7
• /
• 2009

As products are getting more diverse and new products are entering the market faster, customers have trouble learning how to use them. User-oriented menu structures may solve this problem. In order to design user-oriented menu structures, spreading activation theory has been studied. The spreading activation test shows that the strong associative relationship between words has shorter response times. Based on the spreading activation test, asymmetric spreading activation was introduced and a hypothesis that in a well-designed menu structure, association between upper-low menu pairs is not affected by an activation direction was tested for this study. In this study the menu of a cellular phone (Model: SPH-w2900) was extracted, and underwent 1st spreading activation tests. Then, on each menu pair, response time differences (asymmetric transition) by accuracy and directions were analyzed to find out problems in labels and improve menu structures and vocabulary. Second spreading activation tests were conducted to check whether asymmetric transitions decreased. The results showed that response time differences (asymmetric transition) for activation directions were found to be dropped significantly. Asymmetric transitions in spreading activation presented in this study will be helpful to define user-oriented menu structures.

• 한국사회정책
• /
• 제19권3호
• /
• pp.149-183
• /
• 2012

이 글은 한국의 노동시장 활성화 정책의 특성을 분석하고 취업 성과의 측면에서 주요 정책을 비교하는데 그 목적이 있다. 글로벌 금융위기를 전후로 우리나라에서도 기존의 공공부조 수급자뿐만 아니라 저소득 근로자 집단과 청년 미취업자 등을 대상으로 개별 집단 상담과 사례관리를 통해 맞춤형 취업지원서비스와 사회서비스를 제공하는 활성화 정책이 본격적으로 시행되고 있다. 이러한 활성화 정책은 한편으로는 공공부조 수급에 대한 반대급부로서 프로그램 참여 의무 및 급여 수급권과의 연계를 강화하는 등 참여자에 대한 요구 강화 측면이 두드러지지만, 다른 한편으로는 맞춤형 사례관리를 통해 취업장애요인을 제거하고 일반 노동시장으로의 진입을 촉진하기 위해 여러 가지 서비스 수단을 활용하는 역량 강화 측면도 포함하고 있다. 따라서 활성화 프로그램의 특성이 취업성과에 미치는 영향을 분석하여 활성화 정책 프로그램 전달체계와 정책수단의 효과를 파악할 필요성이 제기된다. 본 논문에서는 취업지원서비스와 맞춤형 사회서비스 제공을 특징으로 하는 활성화 정책의 취업 성과를 분석하였다. 이를 통해 활성화 정책의 어떠한 프로그램 성격과 특징, 정책 수단이 공공부조 수급자와 저소득 근로자 집단의 노동시장 진입에 기여하는지 파악하였다. 더불어 기초생활보장제도 급여 수급자의 탈수급 결정 요인도 분석하였다. 회귀분석 결과에 따르면 취업지원 서비스를 집중적으로 제공하는 활성화 정책은 저소득 근로자 집단뿐만 아니라 자활 참여자 집단에 대해서도 취업을 촉진하는 데 기여하였다. 또한 취업의 질이라는 측면에서도 상대적으로 더 나은 성과를 보여주었다. 그러나 수급자의 탈수급을 유인하는데 있어서는 맞춤형 사회서비스를 집중적으로 제공하는 것이 더욱 효과적인 것으로 나타났다. 이러한 분석결과는 활성화 정책의 프로그램 전달체계 및 서비스 수단의 개선 방안을 모색하는데 있어 중요한 이론적 정책적 함의를 갖는다.

• 한국재료학회지
• /
• 제18권10호
• /
• pp.552-556
• /
• 2008

Modified thermal annealing was applied to the activation of the polycrystalline silicon films doped as p-type through implantation of $B_2H_6$. The statistical design of experiments was successfully employed to investigate the effect of rapid thermal annealing on activation of polycrystalline Si doped as p-type. In this design, the input variables are furnace temperature, power of halogen lamps, and alternating magnetic field. The degree of ion activation was evaluated as a function of processing variables, using Hall effect measurements and Raman spectroscopy. The main effects were estimated to be furnace temperature and RTA power in increasing conductivity, explained by recrystallization of doped ions and change of an amorphous Si into a crystalline Si lattice. The ion activation using rapid thermal annealing is proven to be a highly efficient process in low temperature polycrystalline Si technology.

• Nuclear Engineering and Technology
• /
• 제54권11호
• /
• pp.4226-4230
• /
• 2022

The Korea Atomic Energy Research Institute (KAERI) has designed a Hybrid-Low Power Research Reactor (H-LPRR) which can be used for critical assembly and conventional research reactor as well. It is an open tank-in-pool type research reactor (Thermal Power: 50 kW_th) of which the most important applications are Neutron Activation Analysis (NAA), Radioisotope (RI) production, education and training. There are eight irradiation holes on the edge of the reactor core: IR (6 holes for RI production) and NA (2 holes for NAA) holes. In order to quantify the elemental concentration in target samples through the Instrumental Neutron Activation Analysis (INAA), it is necessary to measure neutron spectrum parameters such as thermal neutron flux, the deviation from the ideal 1/E epithermal neutron flux distribution (α), and the thermal-to-epithermal neutron flux ratio (f) for the irradiation holes. In this study, the MCNP6.1 code and FORTRAN 90 language are applied to determine the parameters for the two irradiation holes (NA-SW and NA-NW) in H-LPRR, and in particular its α and f parameters are compared to values of other research reactors. The results confirmed that the neutron irradiation holes in H-LPRR are designed to be sufficiently applied to neutron activation analysis, and its performance is comparable to that of foreign research reactors including the TRIGA MARK II.

• Nuclear Engineering and Technology
• /
• 제54권12호
• /
• pp.4684-4692
• /
• 2022

Radionuclide identification is an important part of the nuclear material identification system. The development of artificial intelligence and machine learning has made nuclide identification rapid and automatic. However, many methods directly use existing deep learning models to analyze the gamma-ray spectrum, which lacks interpretability for researchers. This study proposes an explainable radionuclide identification algorithm based on the convolutional neural network and class activation mapping. This method shows the area of interest of the neural network on the gamma-ray spectrum by generating a class activation map. We analyzed the class activation map of the gamma-ray spectrum of different types, different gross counts, and different signal-to-noise ratios. The results show that the convolutional neural network attempted to learn the relationship between the input gamma-ray spectrum and the nuclide type, and could identify the nuclide based on the photoelectric peak and Compton edge. Furthermore, the results explain why the neural network could identify gamma-ray spectra with low counts and low signal-to-noise ratios. Thus, the findings improve researchers' confidence in the ability of neural networks to identify nuclides and promote the application of artificial intelligence methods in the field of nuclide identification.