• 한국정밀공학회지
• /
• 제13권8호
• /
• pp.120-127
• /
• 1996

Anti-lock Brake System has been developed to reduce tendency for wheel lock and improve vehicle control during sudden braking on slippery road surfaces. This is achieved by controlling the braking pressure, avoiding wheel lock, while retaining handling and brake performance. This paper is concerned about pressurecharacteristics of hydraulic modulator. Experimental sets which is consists of hydraulic modulator, duty controller, pressure regulator, pressure senset is consuructed. System modelling and computer simulation are performed for comparison with experimental results. Brake wheel pressure are measured under various driving pulse. The result of experiment show fairly agreement with the simulation. As a result, it is known that wheel pressure is affected by duty ratio, orifice diameter through computer simulation.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2021년도 봄 학술논문 발표대회
• /
• pp.27-28
• /
• 2021

For Barrier-Free certification, the floor and ground surfaces must be finished with materials that are not slippery, flat, and have low-impact in fallis. However, the BF Certification Act does not provide specific methods to meet these regulations. In performance-based design, the responsibility of proving the performance rests with the building owner and architect, so quantitative evaluation indexes are needed to select suitable materials. Furthermore, changes in performance after completion should be checked periodically in 'As-Is' conditions. There are various methods for slips, trips and falls risk assessment, causing confusion for users. In this study, the results of previous studies on the evaluation methods of slips, trips and falls were considered closely, and each quantitative evaluation index that can be used in the new construction and maintenance phase was presented.

• 한국정밀공학회지
• /
• 제12권12호
• /
• pp.81-90
• /
• 1995

Anti-lock Brake System has been developed to reduce tendency for wheel lock and improve vehicle control during sudden braking on slippery road surfaces. This is achieved by controlling the braking pressure avoiding wheel lock, while retaining handling and brake performance. This paper is concerned about characteristics of a solenoid valve in hydraulic modulator for controlling brake pressure. First, it was modeling the electromagnet by the permeance method. Second, it was modeling the commercial Maxwell poackage program. And then, a experiment was performed in order to justify modeling. The result of modeling coincided with teh result of experiment and commercial packabe program. As a result, these modelings will be able to use in analysis of dynamic character- istics of the solenoid valve for braking.

• Asian Journal for Public Opinion Research
• /
• 제12권2호
• /
• pp.102-121
• /
• 2024

Trust is essential for tax compliance. Various tax management issues might diminish taxpayer trust. As a result, as a measure of transparency in the services of the Indonesia's Directorate General of Taxes (DGT), a method for filing various taxpayer complaints is necessary. Whistleblowing is a service given by the DGT that accepts taxpayer issues and complaints. It may be accessed on the DGT's official website. This strategy was intended to increase compliance by instilling trust among taxpayers. This study aims to show how whistleblowing affects tax compliance by utilizing trust as a mediating variable. The study relied on 400 questionnaires issued directly to East Java I DGT Region taxpayers. SEM-PLS with the Smart-PLS tool was utilized for data analysis. According to the study's findings, whistleblowing positively impacts tax compliance, and trust partially mediates the effect of whistleblowing on tax compliance. The outcomes of this study provide empirical proof for the Slippery Slope Framework's contention that building trust is an essential technique for increasing taxpayer compliance.

• 대한한방내과학회지
• /
• 제30권4호
• /
• pp.708-718
• /
• 2009

Objectives : The aim of this study was to assess the relationship between risk factors, warning signs, tongue diagnosis, pulse pattern, pattern identification and National Institute of Health Stroke Scale in acute stroke patients. Methods : We studied patients hospitalized within 4 wks after their ictus who were admitted at the Internal Medical Department at Kyunghee Oriental Medical Center, Kyunghee University East-West Neo Medical Center, Kyungwon University Songpa Oriental Medical Center, Kyungwon University Incheon Oriental Medical Center, Dongguk University Ilsan Oriental Medical Center from April 2007 to August 2009. We analyzed the relationship between risk factors, warning signs, tongue diagnosis, pulse pattern, pattern identification and National Institute of Health Stroke Scale in acute stroke patients. Results : 1506 subjects were included into the final analysis. 1. In the risk factors, the NIHSS mean score of atrial fibrillation was significantly higher than non-atrial fibrillation. 2. In the warning signs, the NIHSS mean scores of weakness, loss of eyesight, dysarthria, and sensory loss were significantly higher than in the non-warning signs. 3. There were no significant differences in lifestyle, tongue fur color, pattern identification between groups. 4. In the tongue color, the NIHSS mean score of red was significantly higher than pale or pale red. 5. There were significant differences statistically between forceful/weak, fine/not fine, slippery/not slippery pulse and NIHSS score. Conclusion : The above results show the relationship between risk factors, warning signs, tongue diagnosis, pulse pattern, pattern identification and National Institute of Health Stroke Scale in acute stroke patients. These results can be utilized in the future as a basis material.

• 한국자동차공학회논문집
• /
• 제12권2호
• /
• pp.139-147
• /
• 2004

The purpose of engine control TCS is to regulate engine torque to keep driven wheel slip in a desired range. In this paper, engine control TCS using sliding mode control law based on engine model and estimated load torque is proposed. This system includes a two-level controller. Slip controller calculates desired wheel torque, and engine torque controller determines throttle angle for engine torque corresponding to desired wheel torque. Another issue is to measure load torque for model based controller design. Luenberger observer with state variables of load torque and engine speed solves this problem as estimating load torque. The performance of controller and observer is certificated by simulation using 8-degree vehicle model, Pacejka tire model, and 2-state engine model. The simulation results in various maneuvers during slippery and split road conditions showed that acceleration performance and ability of the vehicle with TCS is improved. Also, the load torque observer could estimate real load torque very well, so its performance was proved.

• 한국생활과학회지
• /
• 제12권3호
• /
• pp.363-376
• /
• 2003

The purpose of this research was to investigate the property of sensibility of silk fabrics by the linen-like finishing-used polyurethane resin. Subjective evaluations of preference and related sensory descriptors were estimated. Also, related physical and psychological variables were measured. And their correlations were investigated. The value of EM, WT, WC, MIU, and qmax of silk fabrics treated with polyurethane resin decreased and LT, B, 2HB, G, 2HG, 2HG5, and SMD increased. Physical variables which affected on the preference of summer fabrics are B, 2HB, G, 2HG5, qmax, MIU and LT. It was confirmed that silk fabrics treated with polyurethane resin were preferred as a summer fabric. Individual sensibilities that had effects on the preference of summer fabrics were softness including rough and cold. The intensities of weight value on sensory descriptors, which were related with the preference in summer environments, were in following orders: cold, rough, slippery, flexible, stiff and damp. There was no relationship between the subjective evaluation of preference and related sensory descriptors on the fabric and comfort sensation of fabric was derived from psychological variables

• 한국안전학회지
• /
• 제28권2호
• /
• pp.14-20
• /
• 2013

All most of floors can become less slip resistant with wear. The deterioration of slip resistance can often occur rapidly. So relatively new products can become hazardous within a short period of time. The main objective of this study was the comparison of slip resistance variations caused by traffic wear and accelerative wear. The second objective was to ascertain the effect of wear, and to find out the causes of slip resistance change. Although statistical differences were observed between results of traffic wear and accelerative wear, the trend of the variations of slip resistance caused by traffic wear and accelerative wear was very similar. The measured slip resistance of tested floor changed up to 29%(and 26.5%) after 100,000 steps(and 750 cycles). As the traffic wear and accelerative wear were progressed, the surface roughness of the tested floor became smoother, and so the floor became more slippery under the wet condition. The abraded(worn out) floor surface tended to become hydrophilic surface, while the new floor surface tended to show hydrophobic nature. This phenomenon would change the wettability of floor surface, and the wettability would affect the variation of slip resistance.

• 한국안전학회지
• /
• 제28권6호
• /
• pp.73-78
• /
• 2013

The purpose of this study was to evaluate three kinds of slipmeters (BOT, BPT, English XL) used on-site floor with ASTM F2508 which is comprised of four different standard surfaces(polished granite, glazed porcelain, vinyl composite tile ;VCT, and ceramic tile). ASTM F2508 has two criteria that decide which slipmeter is appropriate or not. The evaluated slipmeters were dreg sled, articulated sturt, and pendulum strike type. The test results revealed that two kinds of slipmeters(BOT, BPT) successfully ranked all four standard surfaces and differentiated among standard surfaces with varying degrees of slipperiness. Nevertheless, the measured value with BOT on the VCT, which was reported as slippery floor in previous study, was higher than its threshold(0.6). Although some slipmeter satisfy two criteria of ASTM F2508, they can underestimate the slip potential. So, another criteria is needed so as to reduce this problem. English XL couldn't properly measure slipperiness under the two kind of floors(glazed porcelain, VCT). So the slider of English XL was modified in order to meet two criteria of ASTM F2508.

• 가정과삶의질연구
• /
• 제27권6호
• /
• pp.141-153
• /
• 2009

This study is focused on the residential spaces that the elderly wish to renovate and their willingness to improve residential environment as they grow old. The analysis shows, first, the most inconvenient places as they grow old are the stairs, following by the toilet and the bath. Second, the place that the elderly most wish to renovate is the floor, upgrading floors with non-slippery materials. And they wish to remove the height differences on the floor to protect them from tripping over, upgrade the floor plan for their convenience and renovate the storage and working spaces at the kitchen and dining areas. The more the government supports the costs of the residential renovation service, the more the elderly are willing to use the renovation service. The factors influencing their willingness to residential renovation are health, residential environment, experience to accidents and their allowances. The elderly who experienced accidents inside their residence are more willing to renovate their house. Even though the elderly wish to renovate their houses, it's not carried out due to the financial difficulties and the lack of information. Thus, the government should share the useful information about residential renovation for the safety of the elderly and find a way to raise money to cover the costs of the renovation.