• The Journal of Korean Medicine
• /
• v.28 no.4
• /
• pp.86-94
• /
• 2007

Objective : Kuesu point is a newly discovered point, it is located in 3-cun from the centre of sacrum laterally, paralleled to the 4th foramen on the sacrum. This controlled trial was to evaluate the superior effect of Kuesu point on back pain which radiated to lower extremities. Methods : Randomized Controlled Trial (RCT) and Single Blind in patient was designed. Patients (n=31) were randomized to two groups, Kuesu-point acupuncture group (Group A, n=16) and non Kuesu point acupuncture group (Group B, n=15). Group A was acupunctured on B25 (大腸兪), B26 (關元兪) and B60 (崑崙) with Kuesu point. Group B was acupunctured on the same points without Kuesu point. The clinical subjects were female patients. Beside acupuncture, the other therapies were excluded. Clinical period was three weeks total. Each group was treated 4-5 times per week for 3 weeks. The outcome measurements were The Estimation Index of Backache (quality of life), Pain Rating Scale (pain intensity) and other physical examinations (ROM, SLR, etc.). Results : 31 patients (Group A: n=16, Group B: n=15) were Randomized, 6 of them dropped out. Eventually 25 patients (Group A: n=15, Group B: n=10) were included in the analysis. Group A acupunctured on Kuesu point scored more significant Estimation Index of Backache and lower PRS (Pain Rating Scale) than Group B acupunctured without Kuesu point (p=0.003/2). It turned out that the group acupunctured on Kuesu point show meaningful high improvement index. And other examination's results showed that the treatment effects of Group A are twice as better as Group B. Conclusion : These results suggest that Kuesu point acupuncture was more effective on lower back pain and improved the life quality of patients, being compared with non Kuesu point acupuncture.

• KIPS Transactions on Computer and Communication Systems
• /
• v.3 no.9
• /
• pp.273-278
• /
• 2014

Recent use of electricity during peak hours electricity supply-demand imbalance is inevitable that limit power use force. Therefore, in this paper, a circuit of parallel power operation equipment for peak power reduction which saves the power to electricity storage device during the non-peak power time and supply from the storage power during the expected power shortages time is designed Through this circuitry, the peak power of the commercial power supply with the parallel operation and connection of the commercial power supply and the power supply of the inverter from electricity storage that is a key feature of PRS(Peak power Reduction System) can be controlled. In addition, in order to increase the efficiency, a Transless Power Circuit DC-AC inverter is developed. Moreover, a variable impedance control is applied to the storage of electric power of an Uninterruptible Power Supply associated with a commercial power source.

• Applied Chemistry for Engineering
• /
• v.22 no.3
• /
• pp.332-335
• /
• 2011

As our interests in eco-friendly materials have been significantly increased, the utilization of porous zeolite concrete that has structural functionality and permeability has been increased. In this paper, the mixture of porous concrete and zeolite, which can be used as multirole boulders, was investigated for the suitability of an environment-friendly product by evaluating of the water purification ability. The contamination removal rates of BOD, TOC, T-N, and T-P in stagnant water tank were 70.6, 67.0, 57.7, and 50.6%, respectively. Also for the non-point source pollution with the inflow and the outflow, the removal rates of Zn, Pb, BOD, and COD were 99.9, 90.0, 69.2, and 33.5%, respectively. The performance of the heavy metal contamination removal for the porous zeolite showed better than that of stagnant system. Therefore, it is expected that the installation of the porous zeolite concrete can play a role as an eco-friendly products by its high contamination removal.

• Journal of Environmental Science International
• /
• v.33 no.3
• /
• pp.217-226
• /
• 2024

Manufacturing workers face increased fatigue and stress due to environmental factors in workplace such as noise and vibration. Addressing this issue requires creating conducive rest spaces; however, the existing conditions of rest spaces in manufacturing workplace are subpar and lack sufficient scholarly evidence. This study investigated the effect of nature-based rest spaces on the physical and emotional recovery from fatigue on manufacturing workers. Three manufacturing complexes with nature-friendly rest spaces were selected, and 63 manufacturing workers participated in the study. The measurement tools included the Multidimensional Fatigue Scale (MFS) for fatigue levels, physiological indicators (blood pressure and heart rate), and emotional indicators (Zuckerman Inventory of Personal Reaction Scale; ZIPERS, Perceived Restorativeness Scale; PRS, Profile of Mood States; POMS and State-Trait Anxiety Inventory; STAI). The study compared recovery levels during a 7-minute rest between a space without plants and a space with natural elements. The results indicated a significant reduction in systolic and diastolic blood pressure of participants in green rest spaces compared with those in conventional rest spaces. Regarding fatigue levels, green rest spaces showed a decrease in systolic blood pressure in the middle-fatigue and high-fatigue groups. Positive feelings increased in green spaces, whereas negative emotions decreased, suggesting that short breaks in nature-friendly environments effectively promote workers' physical and emotional recovery. Furthermore, this study emphasizes the importance of green space in various work environments to promote well-being in workers.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.18 no.3
• /
• pp.327-338
• /
• 1993

This paper proposes a novel method for deriving the Fourier transform pairs of high order pulses given in a generalized form. Primarily, modifying the PRS system model, we establish a new model which simplifies the process of Fourier analysis of the n-th order pulse signal, resulting in a representative relationship. In succession, we present the Frame Formula which plays a role of substituent for the parameters in table look-up procedures. Each look-up table contains all the parameters needed to obtain the Fourier transform of the corresponding pulse of any order. Regarding the amount of calculations and the complexity of procedures required to derive the transforms of pulse signals, analytically or numerically, this method is more compact and timesaving than conventional methods. When pulse has a much narrow width of equivalently higher the order of several pulses, the method presented here acts to the best of its true merit.

• The Journal of Internal Korean Medicine
• /
• v.28 no.2
• /
• pp.230-241
• /
• 2007

Objective : This study was intended to ascertain the protective effect of phenolic-rich fraction (PRF) from Fructus Schisandrae on SH-SY5Y cells. Methods : PRF was obtained from the 80% ethanol extract of Fructus Schisandrae by Sepabeads SP-850 column chromatography. The neuroprotective effect of the FS PRS was investigated due to the hydrogen peroxide $(H_2O_2)-induced$ apoptosis of cultured SH-SY5Y cells. Results : Cell viability assays revealed that pretreating SH-SY5Y cells with PRF (10-200 ${\mu}g/mL$) resulted in significant dose-dependent protection against $H_2O_2-induced$ cell death. The effect was assessed by flow cytometric analysis of DNA contents using propidium iodide (PI) staining. The population of apoptotic cells was increased by 32.89% in only $H_2O_2$ (150 ${\mu}M$)-treated environment, but it was reduced by pre-treatment of FS PRF (200 ${\mu}g/mL$) to 21.61%. $H_2O_2-induced$ caspase-3 activation and PARP cleavage were reduced in FS PRF pre-treated cells, and PRF led to an apparent suppressive effect on the oxidative stress induced by reactive oxygen species (ROS). Conculsion : This study showed that Fructus Schisandrae should be useful for the treatment prevention of neurodegenerative diseases associated with elevated ROS levels.

• The Journal of the Acoustical Society of Korea
• /
• v.38 no.6
• /
• pp.630-636
• /
• 2019

Passive Ranging Sonar (PRS) is a type of passive sonar consisting of three sub-array on the port and starboard, and has a characteristic of detecting a target and calculating a bearing and a distance. The bearing and distance calculation requires physical sub-array position information, and the bearing and distance accuracy performance are deteriorated when the position information of the sub-array is inaccurate. In particular, it has a greater impact on distance accuracy performance using plus value of two time-delay than a bearing using average value of two time-delay. In order to improve this, a study on sub-array position error estimation and error compensation is needed. In this paper, We estimate the sub-array position error based on enetic algorithm, an optimization search technique, and propose a method to improve the performance of distance accuracy by compensating the time delay error caused by the position error. In addition, we will verify the proposed algorithm and its performance using the sea-going data.

• Journal of Acupuncture Research
• /
• v.19 no.1
• /
• pp.65-75
• /
• 2002

Objective : Since ancient times venepuncture has been widely used as a useful treatment for low back pain. This study is made in order to objectively evaluate the therapeutic effect of Weizhong(BL40) on low back pain. Methods : Total 46 cases of low back pain patients were divided into 2 groups; one group took only acupuncture therapy, and the other group took acupuncture and venepuncture therapy together. Each patient's pain was evaluated before the treatment and the 3 or 4 days later after the treatment. Pain rating score(PRS) was used to assess the pain for its intensity, frequency, duration, and aggravating factors. Results : Both acupuncture therapy group and acupuncture & venepuncture group showed good effect on low back pain. Though the latter group showed better pain release effect than the former, there was no statistical significance between pain rating score of two groups. Sciatica group showed no significant difference from non-sciatica group in pain rating score. Palpation on Weizhong(BL40) group showed significant difference only in pain duration from non-palpation group. Exposed vessel around Weizhong(BL40) group showed significant difference in pain rating score from non-exposed vessel group. Conclusion : Weizhong(BL40) venepuncture can be highly recommended as a useful therapy for low back pain patients especially who show exposed vessels on the popliteal area.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.33 no.3A
• /
• pp.327-334
• /
• 2008

Conventional on-channel-repeaters (OCRs) have a crucial problem that the power of a re-transmitted signal is highly limited by a feedback signal due to antenna coupling. The power limitation problem in OCRs has been solved by incorporating a demodulation-type feedback canceller which eliminates unwanted feedback signals by estimating a feedback channel. In applying the demodulation-type feedback canceller to T-DMB repeaters, there is a troublesome problem of unfrequent known pilot symbols, resulting in poor convergence performance of channel estimation. To solve this problem and enhance the accuracy of estimation, we propose a partitioning method of the Phase Reference Symbol (PRS) transformed in time domain. Since filter coefficients are updated every one partitioned subgroup, the number of updates is increased by the number of partitioned subgroups and thus the convergence speed is enhanced. The improved performance of feedback-channel estimation is directly connected with the feedback-cancellation performance. Simulation result shows that the feedback canceller incorporating the proposed partitioning method has a good performance in terms of residual feedback power.

• Korean Journal of Community Nutrition
• /
• v.24 no.2
• /
• pp.127-136
• /
• 2019

Objectives: This study analyzed the education participation reasons and deterrents of dietitians who work in welfare facilities for the elderly. Methods: The survey was completed by 144 dietitians working at welfare facilities for the elderly in Korea. The survey was conducted in October, 2018, both on-line and off-line, based on the demographic characteristics, work status on welfare facilities for the elderly, Participation Reasons Scale (PRS) and Deterrents to Participation Scale (DPS-G). The data were analyzed using frequency analysis, descriptive analysis, factor analysis, reliability analysis, regressive analysis using SPSS ver. 25.0. Results: The reason for participation were divided into three factors: 'Responsibility of professional and self-development ($5.76{\pm}1.04$)', 'Job stability and personal benefits ($4.98{\pm}1.28$)', and 'Interaction and development of professional competencies ($5.85{\pm}1.00$)'. 'Interaction and development of professional competencies' was the highest motivation factor. Also, the deterrents for participation were divided into four factors: 'Dispositional barrier ($2.70{\pm}1.29$)', 'Dissatisfaction of education usability ($3.39{\pm}1.38$)', 'Institutional barrier ($4.21{\pm}1.45$)', and 'Situational barrier ($2.36{\pm}1.30$)'. 'Institutional barrier' showed the highest deterrents factor. In addition, 'Responsibility of professional and self-development' and 'Interaction and development of professional competencies' were negative attributes for 'Dispositional barrier' (p<0.001). Conclusions: These results provide basic data to promote participation in education and contribute to the improvement of their job ability and education capacity of the food and nutrition management of welfare facilities for the elderly.