• Journal of Biomedical Engineering Research
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• v.45 no.2
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• pp.75-80
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• 2024

This research investigates the influence of chair tilt functionality on biometric signals and user comfort, addressing the ergonomic challenges posed by modern sedentary lifestyles. Through an experimental study involving eight male participants, the impact of chair tilt on electromyography (EMG), heart rate, metabolic rate, pressure distribution, and distance between the lumbar spine and the lumbar support part of the chair was measured across different seating postures. The study utilized chairs with both synchronous and non-synchronous tilt mechanisms to explore how adjustments in chair design affect user comfort and physiological responses during prolonged sitting. Key findings suggest that chair tilt functionality can significantly reduce muscle activity and energy expenditure, enhancing user comfort and potentially mitigating health risks associated with prolonged sedentary behavior. Notably, the study revealed a preference among participants for chairs that aligned the rotational center of the tilt with the hip joint, highlighting the importance of this ergonomic feature in enhancing user comfort. Additionally, the research proposes a novel methodology for assessing seating comfort through the analysis of both biometric and physical signals, providing valuable insights for the development of ergonomic chair designs focused on user health and comfort.

• The Research Journal of the Costume Culture
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• v.32 no.1
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• pp.58-69
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• 2024

The purpose of this study was to develop the Functional golf inner-wear by preventing the injuries and enhancing the performance of the Golf swing by checking the influence of the wearing of the functional golf inner-wear considering golf characteristics on the Swing trajectory and Shot distance. Functional inner-wear effective for golf swing was manufactured using the sports taping method. Changes in driver and iron swing before and after wearing the functional golf inner-wear manufactured in this way were measured using trackman equipment. Measurement variables were limited to Club Speed, Attack Angle, Club Path, Ball Speed, Smash Factor, and Priority. Before and after wearing functional golf inner-wear, there were statistically significant differences in driver club speed, iron club speed, driver etch angle, iron club pass, driver ball speed, driver smash factor, iron smash factor, driver carry, iron carry, and right shoulder joint proprioceptive sensory ability. As a result, functional golf inner-wear is effective for ball speed, impact, and carry by increasing club speed and efficient swing. Future research will focus on the development of functional golf that can improve the swing ability in a short game that plays an important role in the golf game through various sports taping grafting technique, textile, special material, film, Research on functional golf inner-wear.

• Architectural research
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• v.26 no.3
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• pp.83-92
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• 2024

The profound impact of earthquakes on human lives and the built environment emphasizes the substantial human and economic losses result-ing from structural collapses. Many researchers in this field highlight the longstanding societal challenge posed by earthquakes and under-score the imperative to minimize such losses. Over the decades, researchers have dedicated efforts to seismic design, focusing on improv-ing structural performance to mitigate earthquake-induced damages. This has led to the development of various structural analysis methods. In this research, a specific RC frame structure (401 Bldg.) at Kyungpook National University that is designed for educational purposes, serves as a representative case. This research employs SAP 2000 for simulation, aiming to assess the structural performance under seismic condi-tions, focusing on evaluating the structural behavior under different column orientations. This research utilizes RSA (Response Spectrum Analysis) to comprehensively examine parameters of displacement, base shear force, base moment, joint radians, and story drift. Referring to the results from RSA, this research also assesses the structural performance using LTHA (Linear Time History Analysis) by conducting synthetic frequency domain and synthetic time domain analyses based on the seismic wave from the Kobe 1995 earthquake (Abeno). Based on the findings from the discussions, this research is expected to be a valuable reference for structural design within seismic resistance and the seismic reinforcement of existing RC frame structures.

• Journal of the Korea Institute of Building Construction
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• v.24 no.4
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• pp.413-424
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• 2024

To expedite construction of small precast concrete buildings using dry joints, this study developed and evaluated a connector system for solid slabs. The research included a comprehensive literature review on seismic design requirements for precast concrete floors, followed by an analytical evaluation of the connector's bearing capacity in 3-story buildings. Experimental assessments were conducted to determine the in-plane and out-of-plane capacities of the newly designed semi-circular connector. Finally, the constructability of both the semi-circular and flat connector configurations was compared through tests on single-story precast concrete frames.

• Physical Therapy Rehabilitation Science
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• v.13 no.3
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• pp.324-331
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• 2024

Objective: This study aimed to explore the effects of a novel training program that integrates ultrasound technology to enhance the palpation skills of physical therapy students. The program was designed to support students in developing more precise palpation techniques by using ultrasound as a supplementary tool for anatomical identification. Design: A randomized controlled trial. Methods: A total of twenty students, all enrolled in the physical therapy department at S University, who met the specified selection criteria, were randomly assigned to one of two groups: the experimental group (EG, n=10) or the control group (CG, n=10). The experimental group participated in an ultrasound-assisted palpation training program, while the control group did not receive this intervention. Results:The experimental group demonstrated significant improvements in their ability to accurately palpate anatomical landmarks, specifically the long head of the biceps brachii (LHBT) and the lateral joint line of the knee (LJLK), as well as an increased level of confidence in their palpation skills (p<0.05). A comparative analysis of changes from pre- to post-training revealed statistically significant differences between the two groups (p<0.05). Conclusions: The findings of this study suggest that the ultrasound-assisted training program can provide valuable educational benefits, offering foundational data to enhance the development of palpation skills in physical therapy students and making a meaningful contribution to educational research within the field.

• Korean Journal of Acupuncture
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• v.41 no.3
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• pp.59-67
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• 2024

Objectives : By reviewing NIH's SPARC program and NCCIH's TARA project, we would like to suggest the direction of research on acupoint utilization in Korea. Methods : The goals, operation methods, result linkage strategies, collaborative activities, and research contents of the SPARC program and TARA program were reviewed and summarized. Results : SPARC connects the identification of medical device mechanisms, clinical efficacy, regulatory approval, and industrialization through nerve stimulation, and the research results are provided to researchers and companies as an open access database. The TARA program creates an open access database of anatomy, physiology, and pathology information on acupuncture points and links it with SPARC to increase understanding and utilization of acupuncture points in the development of medical devices and conducts international cooperation with Korea, China, Japan, etc. Korea's acupuncture point utilization research lacks medical device industrialization connectivity and international cooperation planning. Conclusions : Korea's research on the use of acupuncture points should be planned and managed so that it can be linked to medical device industrialization. In addition, it is necessary to anticipate the demand for bioelectronic medical devices and conduct joint research through open access database linkage and international cooperation.

• Anatomy and Cell Biology
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• v.57 no.3
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• pp.473-475
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• 2024

Transverse basilar cleft (TBC) is an extremely rare variation of the clivus or the basilar part of the occipital bone. In this report, a unilateral transverse basilar fissure was found at the clivus in a head computed tomography of an 18-yearold female patient diagnosed with hemifacial microsomia (HFM). Image analysis of this patient showed shortening of the ramus of the right mandible along with medial displacement of the right temporomandibular joint and hypoplastic right maxilla. In addition, observation of the clivus showed a cleft between the basioticum and basioccipital bones at the level of the pharyngeal tubercle on the right side. This cleft was identified as TBC. Clival variations, TBC included, attributed to HFM have never been reported. This report draws attention to the complex relationship between abnormal development of clivus and HFM syndrome, and sheds light on a possible genetic and molecular association between these two conditions.

• Journal of the Korean Society of Clothing and Textiles
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• v.48 no.5
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• pp.991-1005
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• 2024

This study developed functional leggings to guide correct posture for women not trained in the squat exercise technique. Through in-depth interviews, we developed four types of functional leggings that prevent unskilled women from rotating their legs inward or outward, both improper squat forms. These functional leggings include two types of design variables: MD(medial direction design), which turns the lower extremities inward; LD(lateral direction design), which turns the lower extremities outward; and two types of variables according to material. The angles of each part of leggings during the squat movement were measured, and subjective sensations by women were evaluated, including control leggings CD(control design) without rotation function. There was no difference in the adduction and abduction angles depending on the type of functional leggings. However, at the rotation angles of the hip joint (p=0.005), femur (p=0.016), and tibia (p=0.000), the MD leggings rotated inward regardless of the material. Further, the LD leggings rotated outward regardless of the material. The developed functional leggings had an excellent subjective sense of ease of movement, pressure, and preference, thus the developed functional leggings were appropriate while guiding squat posture.

• Journal of Acupuncture Research
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• v.17 no.4
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• pp.113-119
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• 2000

Objectives : Wrist ganglion is one of the most common diseases on the wrist joint. So far acupuncture, medication, drainage and local anesthetic excision therapy have been used for this disease, but the development of more effective treatment method is being expected because of frequent recurrence and side effect. Considered that most ganglion is polycystic, on the basis of classic centro-square acupuncture, newly transformed centro-square acupuncture was applied to this report. Methods : All the patients with wrist ganglion was divided into two groups. Newly transformed centro-square acupuncture was app(ied to one group composed of 11 patients and classic centro-square acupuncture to the other group with 19 patients. Classic centro-square acupuncture is made up of slanting and straight insertion. the former is a method that tips of 4 needles are inserted from the outersurface of wrist ganglion oriented to the center of the ganglion, the latter is that tip of one needle is inserted on the center of the ganglion straightly. In the newly transformed centro-square acupuncture, straight insertion of dry needle was taken place of by syringe needle in order to drain phlegm. In this report, classic and newly transformed centro-square acupuncture were used somewhat differently from original ones. Moxibustion was applied after removing all the needles. In newly transformed centro-square acupuncture, moxibustion was also applied after drainage of phlegm and slanting insertion. Results : 1. Wrist ganglion was frequently developed around the acupoint of Tae-Yeon(Tai Yuan, LU9) and Yang-Ji(Yang Chi, TE4) and the difference between occurrence of development on the left and right hand had no significancy. 2. The mean number of treatment for recovery : The newly transformed centro-square acupuncture had fewer treatment than classic one. 3. The newly transformed centro-square acupuncture was more effective than classic one. 4. As a result of following up 6 to 72 months after wrist ganglion had been eliminated, there was no recurrence. Conclusion : In the treatment of wrist ganglion, newly transformed centro-square acupuncture can be regarded as more useful method in the clinical practice, because it has comparatiely shorter duration of treatment and is more effective.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.3046-3051
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• 2011

The third-rail system is an important device supplying power directly to the Maglev train through physical contact with the collecting shoe. It is directly related to safety and reliability for the running of Maglev. However, most the third-rail system used in Korea depend on foreign product or technologies, Korea Urban Maglev in the development of appropriate power feeding is urgent. In particular, the turnout section is the weakness point in the system because bending force by turnout section movement and fatigue caused by repetitive motion as well as the expansion by temperature, the forces by Maglev collecting shoe is added th the third-rail. Therefore, this paper proposes the third-rail system appropriate for Korean Urban Maglev of turnout section. To verify the structural stability of POSCO ICT third-rail system, the finite element analysis and physical testing was performed. The third-rail is fixed on each side of the turn-out section steel structure by epoxy insulation supporter and the integral behaviors are occurred. Therefore, the maximum horizontal displacements of each support are investigated and then, it is applied to finite element model of the third-rail to investigate the moments and stress. Also, the bending test about one million times and Expansion Joint for the third-rail was performed. The third-rail system safety and reliability was identified by test line on Korea Institute of Machinery & Materials in Deajeon for under the actual usage environment such as the Maglev and turn-out operation.