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Comparison on the Driver Characteristics and Subjective Workload according to the Road Direction Change using Driving Simulator (도로주행방향 변화에 따른 운전 특성 및 주관적 부하의 운전 시뮬레이터 기반 비교 평가)

  • Jeon, Yong-Wook;Daimon, Tatsuru;Kawashima, Hironao;Kwon, Kyu-Sik
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.32 no.1
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    • pp.26-33
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    • 2009
  • The directions of the road are divided into two, the right-hand side and left-hand side of the road, by the convention and specific native method in the world. This paper deals with the characteristics and behaviors of drivers who are accustomed to driving on right-hand side of the road, drive with a handle on the left-hand side, and comparing with left-hand side drivers. The driver's eye movements were measured by eye camera and questionnaires were used for measuring subjective evaluation such as driving mental workload. The experimental results indicated even if the experts who had much experience on right-hand side driving, they had lower driving skill than novice driver, accustomed to driving on left-hand side. In terms of mental workload, MCH rating scale and MNASA-TLX, the right-hand side drivers were in lower stress condition than the left-hand side drivers because of having much driving experience. However, they conducted a few mistakes by confusing the position of turn signal and windshield wiper because of their driving habit or traits and it lead to operation mistakes. These results can be applied effectively to develop the driving support information with changed environments.

A Study on the Importance and Satisfaction of Consumers in Selecting a Side Dish at a Coffee Shop (커피전문점 소비자의 사이드메뉴 선택 시 중요도와 만족도 연구)

  • Kim, Ae-Young;Lee, Su Jeong;Ko, Seong Hee
    • Korean journal of food and cookery science
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    • v.29 no.2
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    • pp.169-175
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    • 2013
  • The purpose of this study was to provide the basic information necessary to efficiently run a coffee shop. It comparatively analyzes the relative importance and satisfaction of side menu selection characteristics through analyses on customer importance-satisfaction when selecting a side menu as well as their usage behavior of the side menu at coffee shops. According to reason price the analysis result on the differences in the coffee shop side menu importance and satisfaction, there was a difference because the importance of selecting a side menu was higher for the attributes of taste, health, packing & appearance, economics and personnel service compared to satisfaction among which the price of a side menu was found to be the top priority for improvement. The significance of coffee shop side menu for the respondents prior to usage as well as their satisfaction after usage was evaluated in order to comparatively analyze the relative importance and achievement of each characteristic through the IPA. The result indicated that the variables positioned in the Concentrate Here area (II) were related to economic feasibility such as reasonable price, appropriate price of set menu, telecommunication company affiliated service and coupon usage and point accumulation. As for the Keep up the Good Work area (I), there were many variables regarding personnel service including taste of side menu, blending with coffee, clean packing, clean packaging, staff's side menu knowledge, staff's quick response, staff's politeness and staff's sincere response. As for the variables in the Low Priority area (III), health variables on health such as nutritional value, eco-friendly food materials and calories were observed.

A Study on Results of Physical Therapy of Storke Patients (뇌졸중 환자의 물리치료 결과에 관한 연구)

  • Kim, Soo-Min;Joo, Chang-Sik;Kim, Wan-Soo
    • Journal of Korean Physical Therapy Science
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    • v.3 no.1
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    • pp.871-879
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    • 1996
  • The authors studied 74 patients with cal therapy Kosin University Medical March 1994 through February 1995. The results were, as follows: 1. Average age of the subject patients was 59.3 years old, their age ranged from 20 to 84 years old, and the incidence between male and female was 1:1.24 2. In respect to the economy level the middle class revealed the highest incidence, 40(54%) in 74cases. 3. The cause of injury revealed the highest incidence in hypertension 52 patients(72 %), more than all revealed the highest incidence 23 patients(44 %) in 60th years old. 4. The form of injury revealed the highest incidence in infarction 36 patients(49 %), more then all revealed the highest incidence 13 patients (36 %) in 60th years old. 5. As for the region cerebral artery of infarction patients, middle cerebral artery was the highest region of injury 72 %. 6. As for the physical paralysis side, the left side showed higher incidence 40 patients(54 %) compared to the right side 31 patients (42 %). 7. The period of therapy was 56 days, in average extending from 7 days to II months, nore then all there were the most numerous patients within 3 weeks 28 patients(38 %). 8. The upper side of the upper lims had improved 67 patients(91 %), the lower side 48(65 %). In the cases of the lower limb, the upper side had improved 70(95 %), the lower side 58(78 %). In short, patients had improved more the lower limb than the upper limb, the upper side(elbow and shoulder part) then the lower side(wrist and finger) of the upper limb. In the cases of the lower limb, patients had improved more the upper side (knee and hip part) then the lower side(foot and ankle) 9. In the cases of patients can be walking among subject patients 55(74 %) and patients cannot be walking 19 (26 %), In the cases of patients utilized assistant apparatus 34 (62 %) among self-walking, completely patients can be self-walking 21(28 %).

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AN INTEGRATED EMG STUDY OF RELATIONSHIPS BETWEEN PREFERRED CHEWING AND SIDE OF INITIAL MUSCLE PAINS (습관적(習慣的) 저작(咀嚼)과 저작근(咀嚼筋)의 동통유발(疼痛誘發)과의 관계에 대한 근전도학적(筋電圖學的) 연구(硏究))

  • Lee, Sung-Bok;Choi, Dae-Gyun;Choi, Boo-Byung;Park, Nam-Soo
    • The Journal of Korean Academy of Prosthodontics
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    • v.24 no.1
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    • pp.165-176
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    • 1986
  • The purpose of this study was to investigate electromyographically the relationship between preferred chewing side and side of initial muscle pains. In this study, 20 normal healthy subjects were selected , and each subject chewed randomly chewing gum for 20 minutes to establish preferred chewing side. To induce initial muscle pains, biting force of 10Kg on the gnathodynamometer was maintained by the subjects. And the Bioelectric processor EM2(Myo-Ironies Research, Inc. U.S.A.) with the surface electrodes was used to record the EMG activity during all experimental procedures. The results were as follows; 1. A majority of the present subjects (60%) had a preferred chewing side, but with few exceptions, subjects were unable to explain why a given side was preferred; explanations were only 'comfort' and 'habit' 2. The chewing, or working side was determined largely by the mean voltage of the surface electromyogram (EMG); in comparison with EMG from the non-wlring (contralateral) side, the working (ipsilateral) side showed a higher amplitude. 3. After the effort, the right masseter muscle is the most frequent site of pains, followed by the left masseter muscle, the anterior part of the right temporalis muscle and tile anterior part of the left temporalis muscle. 4. After the effort, mean voltages of masseter muscles were slightly increased, but mean voltages of temporalis anterior were slightly decreased at physiologic rest position. 5. No relationships could be established between preferred chewing side and side of initial muscle pains.

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Statistical Review for New USNCAP Side Crash Test Results (새로운 미국 측면 신차안전도평가 결과에 대한 통계적 분석)

  • Beom, Hyenkyun
    • Transactions of the Korean Society of Automotive Engineers
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    • v.21 no.2
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    • pp.104-113
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    • 2013
  • New USNCAP has been carried out by NHTSA including front and side crash from MY2011. In this paper, test results for USNCAP Side crash were reviewed by statistical analysis. This review focused on side crash test results to investigate the effect of changes from new USNCAP side crash test protocol among 30 passenger cars. These results were summarized as followings. Total number of 5 star vehicles on the front seat dummy (16 vehicles, 53.3%) was slightly smaller than the rear seat's (17 vehicles, 56.7%) in MDB test. For the ES-2re dummy, chest injury, ie maximum rib deflection contributed to 66% in the mean value of $P_{joint}$. Pelvis injury was highly dependent upon performance up to 87% in the SID-IIs dummy cited on the rear seat in average $P_{joint}$. For Pole test, pelvis injury made contribution to the average performance to 83%. For standard deviation, it showed the largest value in the same body region as the mean value for each dummy. Overall front seat performance showed 14 vehicles, 44.6% with 5 star vehicles less than each MDB or Pole test result. This result showed that performances in MDB test were different pattern to Pole test on driver position. Number of 5star vehicles for overall side NCAP performance are 18 passenger cars (60%). Curtain airbag and driver thorax airbag were equipped in all test vehicles. One vehicle is equipped with thorax airbag in the rear seat. Results from two side tests considered as reliability problem, ie the cause for large standard deviation in side crash test. Consequently, the countermeasure for new USNCAP side crash test is essential to design the effective side structures for side collision and to control well dummy kinematics with curtain and thorax airbag in order to reduce chest and pelvis injuries.

A Convergence Study through Flow Analysis of Automotive Side Mirror (자동차 사이드미러의 유동 해석을 통한 융합연구)

  • Oh, Bum-Suk;Cho, Jae-Ung
    • Journal of the Korea Convergence Society
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    • v.10 no.9
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    • pp.161-166
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    • 2019
  • This study examines the flows near the different side mirrors by analyzing the flow due to air resistance at A, B and C models of automotive side mirrors. Model A is a square-shaped side-mirror. Model B is a triangular side-mirror and model C is an oval-shaped side-mirror. The air resistance of the side-mirror while driving is reduced and the automotive power can be reduced by changing the design of automotive side-mirror. As analysis result, as the pressure of air resistance against side mirror becomes larger, it can be seen that the air flow rate becomes great. Therefore, it can be estimated that the smaller the pressure of air resistance, the smaller the flow rate and the better the air flow. Therefore, it can be acknowledged that model B is the best model. As the design data of the automotive side mirror obtained on the basis of this study result are utilized, the esthetic sense can be shown while driving a car at real life.

The Effect of Induced Weight Bearing Method Using a Cane on Weight Bearing Distribution in Children with Spastic Hemiplegic Cerebral Palsy

  • Se-Hee Park;Ji-Young Choi;Sung-Min Son
    • The Journal of Korean Physical Therapy
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    • v.35 no.2
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    • pp.48-52
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    • 2023
  • Purpose: This study was undertaken to determine whether the position of cane use affects the distribution of weight-bearing on both feet of children with hemiplegic cerebral palsy in a standing posture. Methods: Twenty participants with cerebral palsy were recruited as volunteers for this study. Using the Zebris FDM-System, weight-bearing distribution according to the method of using a cane was measured under three conditions in randomized order: (1) standing unaided (no cane); (2) standing with the affected side using the cane; and (3) standing with the non-affected side using the cane. The cane was matched by measuring length-from-floor to the greater trochanter of the subject, and was placed 15 cm outward from the little toe on the supporting side. Results: Evaluating the method of using a cane under the three conditions, we determined that pressure of the foot on the affected side was higher in the order: standing with affected side using cane > standing unaided (no cane) > standing with non-affected side using cane (p<0.05). In the post-hoc analysis, a significant difference was observed between (i) standing unaided (no cane) and standing with the affected side using cane, and (ii) standing with affected side using cane and standing with non-affected side using cane (p<0.05). Conclusion: This study suggests that induced weight-bearing methods using a cane on the affected side could increase the weight-bearing capacity on the affected side in children with spastic hemiplegic cerebral palsy, which will have a positive effect on reducing asymmetry weight support.

Coordination Chemistry of Chlorophylls: Which Side of the Chlorin Macrocycle is Favored for the Ligand Coordination\ulcorner

  • Oba, Toru;Tamiaki, Hitoshi
    • Journal of Photoscience
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    • v.9 no.2
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    • pp.362-363
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    • 2002
  • Since chlorophyll a and bacteriochlorophyll a are asymmetric molecules, an external ligand can coordinate to the central Mg atom either from the chiorin macrocycle side where the C13$^2$-methoxycarbonyl moiety protrudes (denoting as the 'back' side) or frome the other side (the 'face' side). We investigated which side of the macrocycle is favored for the ligand coordination, by survey of the highly resolved crystal structures of various photosynthetic proteins and theoretical model calculations. It is found that chlorophyll a as well as bacteriochlorophyll a and b in the photosynthetic proteins mostly bind their ligands on the 'back' sides. This finding was confirmed by the theoretical calculations for methyl chlorophyllide a and methyl bacteriochlorophyllide a as models: the 'back' type ligand-(bacterio )chlorophyll complex was more stable than the 'face' type one. The calculations predicted influence of the Cl3$^2$-stereochemistry on the choice of the side of the ligand coordination, which is discussed in relation to the presence of the Cl3$^2$-epimer of chlorophyll a in photosystem I reaction center [I].

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An Experimental Investigation of Side-Orifice Effects on Pressure Drop for Single-Phase Flow

  • Seo, Kyong-Won;Chun, Moon-Hyun;Nam, Ho-Yun;Park, Seok-Ki;Lee, Yong-Bum
    • Proceedings of the Korean Nuclear Society Conference
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    • 1996.11a
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    • pp.295-300
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    • 1996
  • To investigate the effects of the side-orifice on the pressure drop for single-phase flow, a series of experiments have been carried out with 16 different downstream test sections with various combinations of side-orifice shapes, different numbers of side-orifices, and different arrangements of the side-orifice using water as a working fluid. From the measurements of the pressure drop and the flow rate, the pressure loss coefficient of the side-orifice(s) has been evaluated. Based on the total number of 529 present data, an empirical correlation for the pressure loss coefficient has been developed in terms of Reynolds number and geometric parameters, such as area ratio, equivalent diameter, leading edge, and average width of side-orifice.

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A Study on the Strengthening of Side Structure Against Tug Push Loads (Tug Push 구조보강 방안 연구)

  • Kwon, Oh-Seok;Kim, Doe-Hyun;Ryu, Hong-Ryeul
    • Special Issue of the Society of Naval Architects of Korea
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    • 2009.09a
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    • pp.65-70
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    • 2009
  • In case that tug boat pushes side structures of other large vessels to maneuver, it is required that contacted side structures of the maneuvered vessels have enough structural safety against tug push loads. The objective of this study is to evaluate the structural effect of carling which is installed between side longitudinal stiffeners. A comparative study of side structures with carling and without carling is performed to evaluate the effect of carling member by both FE analysis. According to the result, it is found that the carlings play effective role in the strength of side plates and side longitudinal stiffeners against tug push loads.

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