Purpose: The aim of this study was to describe and understand the experiences of pain and the perceptions of treatment through a traditional Korean medicine clinical trial in patients with non-acute pain after back surgery. Methods: The data collection was recorded through in-depth interviews with 20 participants and transcribed with verbatim. The data were analyzed with qualitative contents analysis. Results: Patients with persistent or recurring pain after back surgery experienced physical and psychological symptoms that resulted in severe difficulties in daily and working life. Their persistent or recurring pain after surgery was a burden in their life and a major source of depression. Because of the difference in the perception of pain between doctors and patients, the patients continuously sought and received various treatments. The patients also wanted to receive customized self-management in exercise so that they could control pain themselves in daily life. Conclusion: A multidisciplinary approach that includes psychological counseling, pain management, individualized exercise, and education for proper posture should be needed to reduce low back pain in patients with pain after back surgery.

Purpose: Spiritual communication is very important in the end of life care or during spiritual distress. But there are few guides on spiritual communication. The purpose of this study was to present the process and method of spiritual communication. Methods: Literature review and content analysis were adopted in this study. In this study, 12 documents were extracted and analyzed in the foreign academic literature dealing with 'spiritual communication', 'spiritual conversation' as main keywords. The concepts of spirit, spirituality, spiritual need, and spiritual health were briefly presented based on the results of previous major studies. Results: Spiritual communication is communication on spiritual topics to satisfy spiritual needs, to alleviate spiritual distress, and to promote spiritual health. In other words, it is communication that allows spirituality to be expressed positively by overcoming obstacles that lead to spiritual health. The process of spiritual communication is divided into preparation for spiritual communication investigation of spiritual history, and communication on spiritual topics. Conclusion: Spiritual communication is very important in spiritual crisis. In particular, patients with severe illnesses such as advanced cancer, the end of life care and spiritual distress, want to talk with their health care providers about spiritual topics. The results of this study will provide important information for future research for the development of spiritual communication skills.

Purpose: This study explored and described the lived experiences of nurses in taking care of patients during COVID-19 pandemic in Korea. Methods: Data were collected through individual in-depth interviews with 10 nurses who involved in COVID-19 patient care. Verbatim transcripts were analyzed using Colaizzi’s phenomenological analysis. Results: Qualitative data analysis revealed three categories: ‘standing in front of the pandemic’, ‘harsh experience of caring for COVID-19 patients’, and ‘finding a way for better COVID-19 patients care’. The lived experience of nurses in caring of patients with COVID-19 infection was ‘finding the best way to provide proper care in unfamiliar and difficult pandemic situation’. Conclusion: The results illustrated the motivation, meaning, and value of pandemic care from the nurses’ perspective. Nurses felt proud of being a part of dedicated hard-working team but distressed by crumbling death without dignity and pressured by being thrown at the front-line in the COVID-19 battle. The advanced practice nurses’ hidden supports and advices were helpful for them to reinforce nursing capacity for optimal care. Nursing professionalism should be enhanced by establishing the scope of practices and providing systematic support with appropriate rewards.

Purpose: The purpose of this study was to understand the forest healing instructor's experiences of providing a forest healing program. Methods: The participants were 12 forest healing instructors who experienced managing a forest healing program at B mountain in C city. Data were collected using focus group interviews and individual in depth interviews and data were analyzed using qualitative content analysis method. Results: As the results of this study, 5 themes and 18 sub-themes were derived. The derived 5 themes were as follows; 1. Choosing a new path as a turning point in life 2. Ambiguity as a new forest healing instructor, 3. Feeling a reward as a forest healing instructor and feeling self-healing. 4. Facing difficulties in operating forest healing programs, 5. Having on-going tasks for the establishment of forest healing programs. Conclusion: In order to provide good forest healing program, we need to develop additional education programs for enhancing professionality as a forest healing instructor and continous long term economical supports and investment for forest healing instructors by the Korea Forest Service.

Purpose: The purpose of this study is to understand the general nurses's experiences of missing patient identification. Methods: Participants were 12 nurses who experienced missing patient identification in general wards in hospitals. Data were collected with focus group interviews and individual in-depth interviews and data were analyzed using qualitative content analysis. Results: As the results of this study, 128 statements, 4 themes and 13 sub-themes were derived. The four themes derived were ‘Situations that we had not to check patient identification properly’, ‘Fear and pressure from the result of missing patient identification’, ‘Feeling guilty to the results of missing patient identification’and ‘Efforts to reassuring patient identification’. Conclusion: In order to prevent the failure of patient identification, we need specialized programs to cultivate patient safety culture not only for nurses, also patients and caregivers, and all departments of hospital. We also need institutional efforts and effective hospital investment and supports for accomplishing the goal.

Purpose: This qualitative research was conducted to explore the experiences of social workers encountering peer conflicts among abused boys living in child counseling protection center (center) and psychosocially intervening to resolve peer conflicts. Methods: The participants were four social workers who were caring for twenty abused boys at the center. Data were collected through participatory observation, in-depth interview, and field data. The collected data were analyzed by emic coding. Results: First, the experiences of social workers encountering peer conflict phenomena among abused boys were ‘psychological distortion from abuse trauma’, ‘manifestation of impulse or aggression to trivial stimuli’, and ‘lack of mutual respect among peers’. Second, the experiences of social workers intervening in resolving peer conflicts among abused boys were ‘stabilize offended feeling’, ‘maintain stability through verbal and non-verbal interventions’, ‘apply positive techniques to improve peer relations’, and ‘help abused children overcome trauma and grow’. Conclusion: Social workers confirmed that the role of social welfare experts was important to secure understanding and insight into peer conflicts between abused children and to convert the pain of abused children into positive energy. The results of this study will help social welfare professionals develop a family-centered abuse trauma recovery program for abused children.

This paper proposes a mathematical model that can calculate the luminescence characteristics driven by alternating current (AC) power using the current-voltage-luminance (I-V-L) properties of organic light emitting devices (OLED) driven by direct current power. Fluorescent OLEDs are manufactured to verify the model, and I-V-L characteristics driven by DC and AC are measured. The current efficiency of DC driven OLED can be divided into three sections. Region 1 is a section where the recombination efficiency increases as the carrier reaches the emission layer in proportion to the increase of the DC voltage. Region 2 is a section in which the maximum luminous efficiency is stably maintained. Region 3 is a section where the luminous efficiency decreases due to excess carriers. Therefore, the fitting equation is derived by dividing the current density and luminance of the DC driven OLED into three regions, and the current density and luminance of the AC driven OLED are calculated from the fitting equation. As a result, the measured and calculated values of the AC driving I-V-L characteristics show deviations of 4.7% for current density, 2.9% for luminance, and 1.9% for luminous efficiency.

Y2O3:Eux (x = 0.005, 0.01, 0.02, 0.03, 0.05, 0.1 mol) phosphors are synthesized with different concentrations of Eu3+ ions by solvothermal method. The crystal structure, surface and optical properties of the Eu doped Y2O3 phosphors are investigated using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and photoluminescence (PL) and photoluminescence excitation (PLE) analyses. From X-ray diffraction (XRD) results, the crystal structure of the Eu doped Y2O3 phosphor is found to be cubic. The maximum emission spectra of the Eu doped Y2O3 phosphors are observed at 0.05 mol Eu3+ concentration. The photoluminescence of 615 nm in the Eu doped Y2O3 phosphors is associated with 5D0 → 7F2 transition of Eu3+ ions. The decrease in emission intensity of 0.1 mol Eu doped Y2O3 is interpreted by concentration quenching. The International Commission on Illumination (CIE) coordinates of 0.05 mol Eu doped Y2O3 phosphor are X = 0.6547, Y = 0.3374.

To improve the shortcomings and expand the advantages of the single-roll melt drag method, which is a type of continuous strip casting method, the melt drag method with a molding belt is applied to AZ31 magnesium alloy. By attaching the forming belt to the melt drag method, the cooling condition of the thin plate is improved, making it possible to manufacture thin plates even at high roll speed of 100 m/min or more. In addition, it is very effective for continuous production of thin plates to suppress oxidation of the molten metal on the roll contact surface by selecting the protective gas. As a result of investigating the relationship between the contact time between the molten metal and the roll and the thickness of the sheet, it is possible to estimate the thickness of the sheet from the experimental conditions. The relationship between the thin plate thickness and the grain size is one in which the thinner the thin plate is, the faster the cooling rate of the thin plate is, resulting in finer grain size. The contact state between the molten metal and the roll greatly affects the grain size, and the minimum average grain size is 72 μm. The thin plate produced using this experimental equipment can be rolled, and the rolled sample has no large cracks. The tensile test results show a tensile strength of 303 MPa.

The reactivity evaluation of copper is performed using ethylenediamine, aminoethanol, and piperidine to apply organic chelators to copper etching. It is revealed that piperidine, which is a ring-type chelator, has the lowest reactivity on copper and copper oxide and ethylenediamine, which is a chain-type chelator, has the highest reactivity via inductively coupled plasma-mass spectroscopy (ICP-MS). Furthermore, it is confirmed that the stable complex of copper-ethylenediamine can be formed during the reaction between copper and ethylenediamine using nuclear magnetic resonance (NMR) and radio-thin layer chromatography. As a final evaluation, the copper reactivity is evaluated by wet etching using each solution. Scanning electron micrographs reveal that the degree of copper reaction in ethylenediamine is stronger than that in any other chelator. This result is in good agreement with the evaluation results obtained by ICP-MS and NMR. It is concluded that ethylenediamine is a prospective etch gas for the dry etching of the copper.

(Bi1/2Na1/2)TiO3 (BNT)-based ceramics are considered promising candidates for actuator application owing to their excellent electromechanical strain properties However, to obtain large strain properties, there remain several issues such as thermal stability and high operating fields. Therefore, this study investigates a reduction of operating field in (0.98-x)Bi1/2Na1/ 2TiO3-0.02 BiAlO3-xSrTiO3 (BNT-2BA-100xST, x = 0.20, 0.21, 0.22, 0.23, and 0.24) via analyses of the microstructure, crystal structure, dielectric, polarization, ferroelectric and electromechanical strain properties. The average grain size of BNT-2BA- 100xST ceramics decreases with increasing ST content. Results of polarization and electromechanical strain properties indicate that a ferroelectric to relaxor state transition is induced by ST modification. As a consequence, a large electromechanical strain of 592 pm/V is obtained at a relatively low electric field of 4 kV/mm in 22 mol% ST-modified BNT-2BA ceramics. We believe that the materials synthesized in this study are promising candidates for actuator applications.

For the purpose of manufacturing a high efficiency TiO2 photocatalyst, B-doped TiO2 photocatalysts are synthesized using a plasma electrolytic oxidation method in 0.5 M H2SO4 electrolyte with different concentrations of H3BO3 as additive. For the B doped TiO2 layer fabricated from sulfuric electrolyte having a higher concentration of H3BO3 additive, the main XRD peaks of (101) and (200) anatase phase shift gradually toward the lower angle direction, indicating volume expansion of the TiO2 anatase lattice by incorporation of boron, when compared with TiO2 layers formed in sulfuric acid with lower concentration of additive. Moreover, XPS results indicate that the center of the binding energy peak of B1s increases from 191.45 eV to 191.98 eV, which suggests that most of boron atoms are doped interstitially in the TiO2 layer rather than substitutionally. The B doped TiO2 catalyst fabricated in sulfuric electrolyte with 1.0 M H3BO3 exhibits enhanced photocurrent response, and high efficiency and rate constant for dye degradation, which is ascribed to the synergistic effect of the new impurity energy band induced by introducing boron to the interstitial site and the improvement of charge transfer reaction.

To improve ferroelectric properties of PZT, many studies have attempted to fabricate dense PZT films. The AD process has an advantage for forming dense ceramic films at room temperature without any additional heat treatment in low vacuum. Thick films coated by AD have a higher dielectric breakdown strength due to their higher density than those coated using conventional methods. To improve the breakdown strength, glass (SiO2-Al2O3-Y2O3, SAY) is mixed with PZT powder at various volume ratios (PZT-xSAY, x = 0, 5, 10 vol%) and coating films are produced on silicon wafers by AD method. Depending on the ratio of PZT to glass, dielectric breakdown strength and energy storage efficiency characteristics change. Mechanical impact in the AD process makes the SAY glass more viscous and fills the film densely. Compared to pure PZT film, PZT-SAY film shows an 87.5% increase in breakdown strength and a 35.3 % increase in energy storage efficiency.

The effect of Sm2O3 doping on the microstructure and electrical properties of the ZPCCA-based varistors is comprehensively investigated. The increase of doping content of Sm2O3 results in better densification (from 5.70 to 5.82 g/cm3) and smaller mean grain size (from 7.8 to 4.1 μm). The breakdown electric field increases significantly from 2568 to 6800 V/ cm as the doping content of Sm2O3 increases. The doping of Sm2O3 remarkably improves the nonlinear properties (increasing from 23.9 to 91 in the nonlinear coefficient and decreasing from 35.2 to 0.2 μA/cm2 in the leakage current density). Meanwhile, the doping of Sm2O3 reduces the donor concentration (the range of 2.73 X 1018 to 1.18 X 1018 cm-3) of bulk grain and increases the barrier height (the range of 1.10 to 1.49 eV) at the grain boundary. The density of the interface states decreases in the range of of 5.31 X 1012 to 4.08 X 1012 cm-2 with the increase of doping content of Sm2O3. The dielectric constant decreases from 1594.8 to 507.5 with the increase of doping content of Sm2O3.

Background: Kinesiology taping (KT)’s therapeutic effect on dysphagia is insufficient, and method of KT application is not yet clear. Objectives: To review the considerations for the clinical application of KT for dysphagia rehabilitation. Design: A systematic review. Methods: The present study involved a systematic search of electronic databases (Medline, Embase, CINAHL, and Web of Science) to identify relevant studies published on the use of KT for dysphagia rehabilitation between 2010 and 2020. Results: Four articles (on child dysphagia, adult dysphagia, and healthy adult) were selected. It was found that when KT was applied with 15% tension to the orbicularis oris, mylohyoid, sternohyoid, and masseter muscles in children with dysphagia, lip closure and sucking function were improved. In addition, when KT with 80% tension was applied below the hyolaryngeal complex in healthy adults, significant activation of the suprahyoid muscle was reported. Application of KT with 50% tension to the digastric posterior bellies and the mylohyoid, geniohyoid, sternocleidomastoid, and upper trapezius muscles in adults with dysphagia showed an immediate improvement in vertical excursion and epiglottis rotation of the hyoid bone. Finally, application of KT with 70% tension to the hyolaryngeal complex in adults with dysphagia showed increased thickness of the suprahyoid and the tongue muscles. Conclusion: The present review indicates that KT has significant potential as a therapeutic exercise method for patients with dysphagia in the future. However, the application of KT in such patients should take into account the shape, design, and degree of tension of the tape and the patient's capability and swallowing function.

Background: Although the Schroth exercise is widely used in idiopathic scoliosis, the Schroth exercise with kinesiotaping is not. And, little research has examined their effectiveness. Objectives: To investigate the effect of Schroth exercise with kinesiotaping on idiopathic scoliosis. Design: A randomized controlled trial. Methods: Participants with hamstring tightness were allocated into the Schroth exercise with kinesiotaping group (SETG, n=12) and the schroth exercise group (SEG, n=11). Participants groups performed Schroth exercise with kinesiotaping or Schroth exercise according to group assignment. To identify changes in spine alignment and balance were performed at pre- and postexercise. Results: Significant changes occurred in spine alignment, balance ability (X mean, LOS forward, LOS right) after exercise in SETG (P<.05). SETG was a significant difference in balance ability (LOS right) than SEG. Conclusion: Schroth exercise with kinesiotaping are effective in improving spine alignment and balance ability in idiopathic scoliosis.

Background: Compression of the sacroiliac joint (SIJ) enables lumbo-pelvic muscles to increase pelvic stability and reduce pain. Many previous studies assessed the effects of pelvic compression belts on the stabilization of the lumbar and SIJs. However, there are a lack of studies to date on the effects of pelvic compression taping (PCT). Objectives: To investigate the effects of PCT on the muscle activity of lumbopelvic muscles during prone hip extension (PHE). Design: Pre-post test design. Methods: In total, 19 healthy male and female participants performed PHE with and without PCT. A surface electromyography system was used to record the muscle activity of multifidus, erector spinae, internal oblique abdominal, and gluteus maximus muscles, and the activities of these muscles before and after taping were compared. Results: During PHE, the activities of the multifidus and erector spinae muscles (P<.05) significantly increased after taping, while that of the internal oblique abdominal muscle significantly decreased after taping (P<.05). However, the activity of the gluteus maximums muscle did not significantly increase or decrease after taping (P>.05). Conclusion: PCT for the SIJ improves the stability of the lumbo-pelvic region, and the use of PCT with functional training would lead to positive clinical effects.

Background: Previous studies have been reported that when instrument assisted soft tissue mobilization (IASTM) and the self-myofascial release technique were used on the muscles. However, studies that applied the IASTM and self-stretching to the gastrocnemius muscle are thought to be necessary but there is no such previous study. Objectives: To investigate the effects of IASTM and self-stretching on gastrocnemius muscle thickness and the range of motion of joint in dorsiflexion in healthy college student. Design: Quasi-experimental design (single blind). Methods: The subjects were healthy college students in their 20s with a healthy body. As for the experimental method in this study, comparison between before and after the experiment was performed to compare the effects of myofascial release using IASTM and stretching. The preliminary survey investigated the range of motion (ROM) of ankle joint of the subjects. The thicknesses of gastrocnemius muscles were measured using ultrasonography. One day after the preliminary survey, IASTM interventions and self-stretching interventions were randomly selected. If IASTM intervention is selected, the IASTM of the gastrocnemius muscle was applied for 5 minutes. After than, muscle thickness and the ankle dorsiflexion ROM were measured. Subjects were asked to take a break for about one day after performing the intervention. Self-stretching was applied to the gastrocnemius muscle for 5 minutes identically. After than, muscle thickness and the ankle dorsiflexion ROM were measured. Results: The thickness of the gastrocnemius muscle decreased significantly IASTM intervention, and the ankle dorsiflexion ROM increased significantly IASTM intervention. Ankle dorsiflexion ROM increased significantly the selfstretching intervention. The amounts of change in ankle dorsiflexion ROM through the IASTM was significantly greater than that through self-stretching. Conclusion: In order to immediately increase muscle flexibility in a short time, the IASTM is more effective although the self-stretching method is also effective.

Background: Cervical spine mobilization is an effective intervention method to increase cervical range of motion (ROM). However, whether using a sling with cervical spine mobilization can provide a similar positive effect in improving ROM and muscle stiffness as conventional cervical spine mobilization has not yet been proven. Objectives: To investigated the effects of sling with cervical spine lateral mobilization on improving neck ROM and muscle stiffness in healthy subjects. Design: A two-group pre-posttest design. Methods: A total of 20 healthy subjects were allocated to a sling with cervical spine mobilization (SWCM) group (n=10) and a cervical spine mobilization (CM) group (n=10). The mobilization exercise at grade Ⅳ+ amplitude was applied to the left-side and right-side C3-C4 and C4-C5 of each group for three sets. The mobilization exercise was performed for 30 seconds (frequency of two vibrations per second), with a 30-second resting time. The active cervical ROM, muscle tone, and muscle stiffness of the cervical region of each group was measured and compared before and after the intervention. Results: The active cervical ROM of both groups significantly improved after the intervention (p<.05). However, no significant differences in the cervical active ROM, cervical muscle tone, and muscle stiffness were observed between two groups. Conclusion: The application of sling with cervical spine lateral mobilization is an intervention method that can be effectively used to improve the physiological movement of the neck, as well as cervical muscle tone and stiffness.

Background: Although recent studies using virtual reality have been actively conducted, studies on exercise therapy interventions and changes in muscle characteristics in patients with scoliosis are limited. Objectives: To investigate the effects of trunk and pelvic exercises program using virtual reality on the characteristics of paraspinal muscles in patients with scoliosis. Design: A randomized controlled trial. Methods: Thirty college students with scoliosis were randomly assigned to the trunk and pelvic exercise program using virtual reality group (VRG; n=15) and the general stretching exercise group (SG; n=15). The intervention was conducted three times a week for 8 weeks for 30 min per session. The recorded variables were muscle tone (F), muscle stiffness (S), and muscle elasticity (D). The collected data were analyzed after statistical processing. Results: In the cervical vertebrae, F showed significant differences in the amount of inter-group variation in the VRG compared that in the SG on the right side. The VRG showed significant increases in intra-group variation on both the right and left sides. S showed significant differences in the amount of inter-group variation in the VRG compared to that in the SG on the right side. With regard to the intra-group variation of F in the thoracic vertebrae, the right muscle in the VRG demonstrated significantly increased after the experiment, while D significantly increased in the left muscle in the VRG. Conclusion: Pelvic and trunk exercises program using virtual reality may be applied a better therapeutic intervention for patients with scoliosis.