Background: The craniocervical flexion test (CCFT) was developed for the activation and endurance of deep cervical flexors. However, the muscle thickness and muscle thickness changing ratio of the sternocleidomastoid (SCM) and deep cervical flexor (DCF) muscles in subjects with and without forward head posture (FHP) have not been reported. Objects: To determine the difference in thickness of the SCM and DCF muscles and the difference in the muscle thickness changing ratio between SCM, DCF, and DCF/SCM 20 mmHg and DCF/SCM 30 mmHg between subjects with and without FHP. Methods: Thirty subjects with and without FHP were enrolled. The muscle thickness of the SCM and DCF was measured when maintained at a baseline pressure of 20 mmHg and a maximum pressure of 30 mmHg using a pressure biofeedback unit during the CCFT. Ultrasonography was used to capture images of SCM and DCF muscle thickness during the CCFT, which was calculated using the picture archiving and communication system (PACS). Results: We observed a significant difference within the pressure main effect between SCM and DCF at a baseline pressure of 20 mmHg and a maximum pressure of 30 mmHg (p < 0.05). However, there was no significant difference in the muscle thickness and muscle thickness changing ratio for SCM and DCF during CCFT between subjects with and without FHP. Conclusion: There was no significant difference in the muscle thickness recruitment pattern during CCFT in posture changes between subjects with and without FHP.

Background: The application of Kinesio tape (KT) has become an alternative treatment for the reduction of edema owing to its distinct characteristics that mimic skin behavior. Although many studies have found that KT application has a positive effect on edema related to breast cancer and rehabilitation following mandibular third molar surgery, there is little evidence to support the use of KT for musculoskeletal injuries. Objects: The purpose of this study was to review the literature related to KT application for reducing edema caused by musculoskeletal disorders. Methods: A literature search (July 2022) was performed on PubMed for articles published between January 2012 and June 2022. The following keywords were used: “Kinesio taping,” “Kinesio tape,” “swelling,” and “edema,” with different combinations and derivations. Only articles available in English were included in this study. Results: Among 68 identified studies, seven met our search strategy and criteria and were included in the literature review. Five of these studies investigated musculoskeletal disorders of the knee joint; two of them reported that KT application had a positive effect on edema measured using perimetry following total knee replacement and anterior cruciate ligament reconstruction. However, the KT application did not improve swelling in patients with acute lateral ankle sprains. Pediatric patients with acute proximal phalangeal joint sprain experienced a more significant improvement in the reduction of swelling than the group using a splint. Conclusion: This literature review found discrepant evidence to support using KT for edema control in musculoskeletal disorders. Further research is needed to determine the effectiveness of KT for controlling edema following musculoskeletal injuries.

AZ31 magnesium alloy was used to manufacture a thin plate using a melt drag method. The effects of roll speed, molten metal temperature, and molten metal height, which are the basic factors of the melt drag method, on the surface shape, the thickness of the thin plate, Vickers hardness, and microstructure of the thin plate were investigated. It was possible to manufacture AZ31 magnesium alloy thin plate at the roll speed range of 1 to 90 m/min. The thickness of the thin plate, manufactured while changing only the roll speed, was about 1.8 to 8.8 mm. The shape of the solidified roll surface was affected by two conditions, the roll speed and the molten metal height, and the Vickers hardness of the manufactured magnesium alloy thin plate value ranged from Hv38~Hv60. The microstructure of the thin plate produced by this process was an equiaxed crystal and showed a uniform grain size distribution. The grain size was greatly affected by the contact state between the molten metal and the solidification roll, and the amount of reactive solids and liquids scraped at the same time as the thin plate. The average grain size of the thin plate fabricated in the range of these experimental conditions changed to about 50-300 μm.

Single OLED and tandem OLED was manufactured to analyze the electroluminescence characteristics of DC driving, AC driving, and full-wave rectification driving. The threshold voltage of OLED was the highest in DC driving, and the lowest in full-wave rectification driving due to an improvement of current injection characteristics. The luminance at a driving voltage lower than 10.5 V (8,534 cd/m2) of single OLED and 20 V (7,377 cd/m2) of a tandem OLED showed that the full-wave rectification drive is higher than that of DC drive. The luminous efficiency of OLED is higher in full-wave rectification driving than in DC driving at low voltage, but decrease at high voltage. The full-wave rectification power source may obtain higher current density, higher luminance, and higher current efficiency than the AC power source. In addition, it was confirmed that the characteristics of AC driving and full-wave rectification driving can be predicted from DC driving characteristics by comparing the measured values and calculated values of AC driving and full-wave rectification driving emission characteristics. From the above results, it can be seen that OLED lighting with improved electroluminescence characteristics compared to DC driving is possible using full-wave rectification driving and tandem OLED.

Double-layer capacitors (DLCs) are developed with high surface electrodes to achieve a high capacitance value. In the present work, the initial bulk concentration of 1 mol/m3 and 3 mol /m3 are selected to show the consequential effects on the performance of a double-layer capacitor. A 1D model of COMSOL Multiphysics has been developed to analyze the electric field and potential in cell voltage, the electric displacement field and polarization induced by the field, and energy density in a double-layer structure. The electrostatics and the electric circuit modes in COMSOL are used to simulate the electrochemical processes in the double-layer structure. The analytical analysis of a double-layer capacitor with different initial bulk concentrations is investigated by using Poisson-Nernst-Plank equations. From the simulation results, the differential capacitance changes as a function of compact layer thickness and initial bulk concentration. The energy density varies with the differential capacitance and voltage window. The values of energy density are dominated by the interaction of ions in the solution and electrode surface.

Background: A recent study found that pain neuroscience education (PNE) alters pain intensity, knowledge of pain, disability, psychological function, and pain behavior in patients with musculoskeletal pain. However, they noted that PNE alone was not sufficient to affect chronic low back pain (CLBP) reduction. Objectives: To investigated the effect of CLBP on the PNE combined with lumbar mobilization. Design: Quasi-experiment study. Methods: A total of 33 patients aged 25 to less than 65, recruited from L-hospital for low back pain in Chungcheongnam-do. Out of 33 subjects, 17 were pain neuroscience education combined with lumbar mobilization group (PLMG) and 16 were lumbar mobilization group (LMG). The outcome was visual analogue scale (VAS), oswestry disability index (ODI) and the fear avoidance beliefs questionnaire (FABQ). The collected data was analyzed using the SPSS ver. 21.0 program by paired t-test and independent t-test. Results: PLMG was indicated statistically significant decrease in VAS, ODI and FABQ before and after intervention. However, there were statistically significant changes in VAS and ODI before and after intervention in LMG. PLMG and LMG before and after intervention indicated statistically significant differences in VAS, ODI and FABQ. Conclusion: The inclusion of PNE combined with lumbar mobilization in patients with CLBP is a promising and feasible approach to the management of CLBP.

Background: There is a research report that lumbar mobilization for healthy people improves the knee extension angles and Q-angle related muscle activity (Q: quadriceps muscle). However, there is a lack of research on the effect of lumbar mobilization on gait variables such as cadence and gait speed, especially when mobilizing the central part of the lumbar spine from posterior to anterior. Objectives: To examine the effect of lumbar central PA mobilization in healthy people on cadence and gait speed. Design: Pilot study. Methods: There were 34 participants in this study. In the experimental group, lumbar posterior-anterior joint mobilization was performed once in Grade III-IV for 5 minutes, focusing on the segment with reduced movement. In the control group, lumbar posteroanterior mobilization was performed once in a total of Grade I-II for 5 minutes. To measure cadence and gait speed, STT-IWS and iSen System (San Sebastian, Spain) were used. Results: The comparison of cadence between groups, CG (Control group) increased cadence was about 6 more than EG (Experimental group) cadence, but it was not statistically significant. The gait speed of EG and CG was .30- .31, which was similar between the two groups, and the before and after values were also similar. There is no statistically significant difference Conclusion: The cadence and gait speed of the experimental group were not statistically significantly different than those of the placebo group.

Background: Previous studies have reported that improving the spinal stability could be more effective in the prevention and treatment of recurrence. Lumbar stabilization exercise is known to strengthen the lumbar extension muscles and enhance physical, psychological and social functions. Objectives: To investigated the effect of lumbar spiral stenosis on the kinetic link training and lumbar stabilization exercise. Design: A randomized controlled trial. Methods: Study was preformed by randomly allocated 28 LSS participants into a kinetic link training group (KLT, n=14) and a lumbar stabilization exercise group (LSE, n=14). Kinetic link training and lumbar stabilization exercise were performed to subjects in both groups 5 times a week for 6 weeks. To verify the effect of LSS, changes in VAS, ODI, and proprioception before and after intervention were observed. Results: In KLT, statistically significant changes were found in VAS, ODI, and Proprioception before and after intervention. In LSE, there were significant changes in VAS and ODI before and after intervention. KLT and LSE before and after intervention indicated significant differences in proprioception. Conclusion: KLT and LSE are applied to LSS, there are effects of pain decrease, lumbar recovery and proprioception improvement.

Background: Generally, rounded shoulders may occur when an individual habitually takes a relaxed, slouched posture. Although various studies on the round shoulder exist, studies on the effect of improvement of thoracic mobilization on the round shoulder are insufficient. Objectives: To investigate the effect of thoracic mobilization on round shoulders and pulmonary capacities. Design: Randomized controlled trials. Methods: Twenty subjects were randomly allocated into an exercise group (n=10) and a mobilization group (n=10). To quantify the round shoulder before and after the intervention, the distance between the acromion and the table surface was measured, and the pulmonary capacities were also measured. The intervention program was conducted twice a week for 6 weeks. The exercise group performed corrective exercise, and the mobilization group performed both corrective exercise and thoracic mobilization. Results: The round shoulder in both groups was significantly decreased (P<.05), and the pulmonary capacities were significantly improved (P<.05). However, there was no significant difference between the two groups (P>.05). Conclusion: The combination of corrective exercise with stretching and strengthening exercises led to the improvement of round shoulders and pulmonary capacities, no additional benefits were detected with thoracic mobilization.

Background: Women patients who have undergone high tibial osteotomy need management to control walking and balance and to enable functional daily life. In that way, land-based physical therapy and aquatic physical therapy were performed. Objectives: To investigated the effect of land-based and aquatic physical therapy on the balance and walking of women who had undergone high tibial osteotomy. Design: Randomized control trial. Methods: In all, this randomized controlled trial enrolled 21 patients with high tibial osteotomy who received land-based physical therapy (LP, n=7), aquatic physical therapy (AP, n=7), and land-based and aquatic physical therapy (LAP, n=7). Single-leg standing balance, 10-m walk test, and Knee injury and Osteoarthritis Outcome (KOOS-12) scores were. The intervention period was 3 days per week for 6 weeks. Results: One-leg standing balance and 10-m walk test increased statistically, and KOOS-12 score also increased statistically. All three groups have improved. As a result, the variable changes were compared in three groups, and although there was no significant difference between the land-based and aquatic physical therapy groups, the land-based and aquatic physical therapy combined programs improved further than the previous two groups. Conclusion: The balance and walking of female patients with high tibial osteotomy were found to have been very effective in land physical therapy and aquatic physical therapy. In addition, the land-based and aquatic physical therapy combination program can improve balance and walking more effectively.

Background: The purpose of this study was to investigate whether the function of stroke patients could be improved by simultaneously performing bridging and masticating exercises. And, this was tested by examining whether the effects of arousal and cognitive improvement due to mastication muscle activity could affect exercise ability. Objectives: To compare the effects, the movement of the center of pressure and the stability limit change were measured using a balance analysis platform (BT4). Design: Randomized controlled trial. Methods: In this study, 36 chronic stroke patients were randomly assigned to either single training group of the bridging exercise or combined training group that performed both the bridging exercise and the mastication exercise. The exercise was performed for thirty minutes a day, three times a week, for eight weeks. Results: In both groups, the static balance ability improved after exercise, but the dual-task training group had a better improving effect on the distance and area of the center of pressure while the eyes was open. The dynamic balance ability also improved after exercise, and the dual-task training was more effective in reducing forward, left, and right movements, but not in backward movement. Conclusion: The importance of mastication was recognized in the rehabilitation of chronic stroke patients, and it can be expected to use mastication to improve balance in stroke patients in the future.

Background: The rounded shoulder posture (RSP) causes the protraction, downward rotation, and anterior tilt of the scapula. Many studies reported that various interventions for the RSP could be helpful for RSP correction. However, no study has reported on the effect of an orthosis on the RSP. Objectives: To investigate the effect of an orthosis on the RSP in comparison with kinesio taping in 32 participants with RSP. Design: Quasi-experimental study. Methods: Thirty-two participants with RSP were randomly assigned into the kinesio taping group (n=15) and orthosis group (n=17). Kinesio taping was applied as follows: 1) both sides of the spine in a vertical direction from C7 to T12. 2) Both sides of the spine in an oblique direction from the coracoid process of the scapula through the acromion to the T12. Orthosis was tried on, and a pull adjustment strap was used to correct the RSP for each participant. Results: Both groups showed significant differences in the height of the acromion to the ground, forward head angle, forward shoulder angle, visual analog scale, and neck disability index within each group. However, no significant differences in all measurements were observed between the two groups. Conclusion: Orthosis for the RSP with exercise would improve the correction of the RSP as much as kinesio taping.

Background: Scoliosis can be caused by postural changes. The effects of Schroth exercises and Kinesio taping for scoliosis have been reported independently, but there are few studies on the effects of combining both methods. Objectives: To investigated the effects of Schroth exercises and kinesio taping on the Cobb angle and dynamic balance ability in patients with scoliosis. Design: Quaxi-experimental study. Methods: Participants were divided into the taping (n=3) and non-taping (n=3) groups. Pre-tests for the Cobb angle and dynamic balance were performed prior to the first intervention, and post-tests were performed after the intervention was completed. The non-taping group performed Schroth exercises for a total of 12 35-minute sessions thrice a week for 6 weeks. Meanwhile, in the taping group, Kinesio tape was attached before performing the same exercises and was maintained for 24 hours after the exercises were finished. Results: In the taping group, there was no significant change in the Cobb angle and dynamic balance ability pre- and post-intervention (P>.05). Similarly, there was no significant change in the Cobb angle and dynamic balance ability pre- and post-intervention (P>.05) in the non-taping group. Furthermore, there was no significant difference upon comparing the two groups (P>.05). Conclusion: Kinesio taping combined with Schroth exercises did not give additional benefits in terms of the Cobb angle and dynamic balance ability than that in the application of Schorth exercises alone.

Background: The traditional treatment protocol in adhesive capsulitis cases is physical therapy agents and a home exercise program. The extensive majority of patients respond to conservative treatment, but the painful rehabilitation program makes it inconvenient for individuals to fully comply with the treatment. In order to reduce pain and spasm, intraarticular injections or suprascapular nerve block may be effective before the rehabilitation program. Objectives: To investigated the effect of suprascapular nerve block (SNB), which is added to standard physical therapy on pain, functionality and range of motion in patients with adhesive capsulitis (AC). Design: Retrospective study. Methods: This study included 46 patients who were treated for AC. Patients in both groups were given 15 season physical therapy and home exercise. The treatment group consisted of patients who underwent multiple SNB in addition to physical therapy and home exercise. Datas were analyzed retrospectively. Results: The Visual Analogue Scale (VAS), ROM, Shoulder Pain and Disability Index (SPADI) and Constant scores in both groups after treatment and at the third month follow-up (P<.001). In the comparison between the groups, it was determined that the improvement in VAS, ROM and SPADI scores in the treatment group at the 3-month control was statistically significant (P<.05). Conclusion: Multiple SNB added to physical therapy and home exercise program in cases of AC may be effective in terms of pain control, increasing joint range of motion and improving functionality.

Background: Although several studies have reported functional improvements after forward walking training on a treadmill and after backward walking training on a treadmill, there is a lack of immediate effects data, investigating spatiotemporal parameter, neuromuscular recruitment. Objectives: To compare the immediate effects between forward and backward walking on treadmill training, present study measured muscle activities of the lower extremity, gait parameters, and dynamic balance. Design: Cross-sectional study. Methods: The twenty-four asymptomatic young male subjects were participated in this study. Subjects have performed 15-min of forward and backward walking on treadmill. Before and after treadmill walking, the gait parameters were measured with the GAITRite. The dynamic balance abilities were assessed with the Y-balance test. Muscular activities were collected from the tibialis anterior, gastrocnemius, biceps femoris, and rectus femoris during forward and backward walking. Results: Muscular activities of the biceps femoris and tibialis anterior were significantly different between forward and backward walking conditions, which were higher with the backward walking (P<.05). Compared to the pre-measurement, the normalized dynamic balance composite score of the post-measurement was significantly higher with the backward walking (P<.05). Regardless of the treadmill training method, there were no significant differences between pre and post measurement, both the stride length and step length (P>.05). Conclusion: The performing backward walking training has positive effects for dynamic balance.

Metal halide perovskite (MHP) nanocrystals (NCs) have emerged as promising materials for various optoelectronic applications including photovoltaics, light-emitting devices, and photodetectors because of their high absorption coefficient, high diffusion length, and photoluminescence quantum yield. However, understanding the morphological evolution of the MHP NCs as well as their controlled assembly into optoelectronic devices is still challenging and will require further investigation of the colloidal chemistry. In this study, we found that the amount of n-octylamine (the capping agent) plays a crucial role in inducing further growth of the MHP NCs into one-dimensional nanowires during the aging process. In addition, we demonstrate that the dielectrophoresis process can permit self-alignment of the MHP nanowires with uniform distribution and orientation on interdigitated electrodes. A strong light-matter interaction in the MHP NWs array was observed under UV illumination, indicating the photo-induced activation of their luminescence and electrical current in the self-aligned MHP nanowire arrays.

This study explored the possibility of forming a coating layer containing alginic acid on the surface of a magnesium alloy to be used as a biomaterial. We formed a coating layer on the surface of a magnesium alloy using a plasma electrolytic oxidation process in an electrolytic solution with different amounts of alginic acid (0 g/L ~ 8 g/L). The surface morphology of all samples was observed, and craters and nodules typical of the PEO process were formed. The cross-sectional shape of the samples confirmed that the thickness of the coating layer became thicker as the alginic acid concentration increased. It was confirmed that the thickness and hardness of the sample significantly increase with increasing alginic acid concentration. The porosity of the surface and cross section tended to decrease as the alginic acid concentration increased. The XRD patterns of all samples revealed the formation of MgO, Mg2SiO4, and MgF2 complex phases. Polarization tests were conducted in a Stimulate Body Fluid solution similar to the body's plasma. We found that a high amount of alginic acid concentration in the electrolyte improved the degree of corrosion resistance of the coating layer.

This study investigated a graded-refractive-index (GRIN) coating pattern capable of improving the light extraction efficiency of GaN light-emitting diodes (LEDs). The planar LEDs had total internal reflection thanks to the large difference in refractive index between the LED semiconductor and the surrounding medium (air). The main goal of this paper was to reduce the trapped light inside the LED by controlling the refractive index using various compositions of (TiO2)x(SiO2)1−x in GRIN LEDs consisting of five dielectric layers. Several types of multilayer LEDs were simulated and it was determined the transmittance value of the LEDs with many layers was greater than the LEDs with less layers. Then, the specific ranges of incident angles of the individual layers which depend on the refractive index were evaluated. According to theoretical calculations, the light extraction efficiency (LEE) of the five-layer GRIN is 25.29 %, 28.54 % and 30.22 %, respectively. Consequently, the five-layer GRIN LEDs patterned enhancement outcome LEE over the reference planar LEDs. The results suggest the increased light extraction efficiency is related to the loss of Fresnel transmission and the release of the light mode trapped inside the LED chip by the graded-refractive-index.

Magnesium-antimonide is a well-known zintl phase thermoelectric material with low band gap energy, earthabundance and characteristic electron-crystal phonon-glass properties. The nominal composition Mg3.8-xZnxSb2 (0.00 ≤ x ≤ 0.02) was synthesized by controlled melting and subsequent vacuum hot pressing method. To investigate phase development and surface morphology during the process, X-ray diffraction (XRD) and scanning electron microscopy (SEM) were carried out. It should be noted that an additional 16 at. % Mg must be added to the system to compensate for Mg loss during the melting process. This study evaluated the thermoelectric properties of the material in terms of Seebeck coefficient, electrical conductivity and thermal conductivity from the low to high temperature regime. The results demonstrated that substituting Zn at Mg sites increased electrical conductivity without significantly affecting the Seebeck coefficient. The maximal dimensionless figure of merit achieved was 0.30 for x = 0.01 at 855 K which is 30% greater than the intrinsic value. Electronic flow properties were also evaluated and discussed to explain the carrier transport mechanism involved in the thermoelectric properties of this alloy system.

최근 발생하는 테러공격들 중 4차 산업혁명을 통해 새롭게 떠오르는 신 흥기술인 드론, 3D 프린팅 건, 인공지능 등을 이용한 테러공격과 사이버 테러가 증가하면서 이로 인한 테러공격의 충격과 공포의 파급효과가 더 크게 나타나고 있다. 문제는 이러한 기술이 비싸지 않고 쉽게 구입할 수 있는 일상적인 도구들이어서 악의적인 의도를 가진 일반인들과 극단주의 자들, 그리고 테러리스트들이 쉽게 테러이용수단으로 활용할 수 있다는 점이다. 더 우려스러운 점은 이 같은 신흥기술을 이용한 테러이용수단들 은 폭탄, 총포류 등의 전통적인 테러이용수단을 사용한 테러에 대한 대응 방안을 갖추고 있는 현재의 중요기반시설들과 다중이용시설 등의 보안을 위한 테러 대응전략과 방안들을 무력화시킨다는 것이다. 신흥기술을 이용 한 테러위협에 대한 대응은 특히 과학적 측면에서 연구되고 개발되어야 할 부분이기 때문에 이러한 위협에 대한 실효적인 테러대응방안을 수립하 려면 테러대응기관들과 안보기관들, 관련 신흥기술의 전문가들로부터 과 학적 연구, 실험, 개발 등의 지원을 받아야만 한다. 그러나 국내의 경우는 아직까지 신흥기술을 이용한 테러 공격에 대한 적절한 테러 방어기술이나 전략이 미흡하다. 이런 문제의 근본 이유는 국내의 주요 테러대응기관이 나 안보관련 기관들이 신흥기술에 대한 대비를 할 수 있도록 지원하는 과 학과 증거에 기반 한 연구, 실험, 그리고 개발을 위한 체계·권한·예산·인 력 등이 현재의 국내 법률상의 한계로 인해 제대로 구축되거나, 지원되거 나, 혹은 운용되지 못하기 때문이다. 이에 따라 이 연구는 신흥기술을 이용한 테러공격에 대비하고 있는 선 도적인 모범사례에 해당하는 미국 국토안보부(DHS)의 Science and Technology Decorate(S&T)와 Emerging Technologies Subcommittee of the Homeland Security Advisory Council (이하 HSAC)의 활동, 역할, 임무를 소개한다. 미국의 S&T는 현존하는 그리고 3년에서 10년의 단기, 그리고 더 먼 미래에 신흥기술을 포함한 모든 부분에서 미국 국가 의 안보를 헤치고 국민의 생명과 재산 그리고 민주주의의 절차에 도전이 되는 다양한 위협들을 파악하고 이에 대한 대응방안을 각 분야의 최고 전문가와 전문연구센터들과 함께 연구하고 있다. 이와 함께, 이 연구는 이러한 S&T의 활동을 가능하게 하는 관련 법령인 신흥위협예방법 2018 (The Preventing Emerging Threats Act of 2018)(S.2836)에 대해 소 개한다. 그리고 마지막으로 이 연구에서 소개하는 미국 사례에 대한 정책 적ㆍ법적 시사점과 국내의 적용가능성에 대해 논의하였다.