Background: With rapid advances in digital technology, tablet PC use among university students has increased significantly. While convenient, prolonged use often causes neck and shoulder discomfort due to poor posture, such as forward head posture and rounded shoulders. Although students commonly use tablets for writing, there is limited research on head movements during these tasks. Objects: To compare frontal plane head movements and tablet tilt angles between college students with and without neck pain during tablet PC use. Methods: Participants were divided into two groups based on neck pain presence (neck pain group and no pain group). Each participant sat at a table, adjusted the tablet stand angle independently, and placed the tablet accordingly. Participants wore earphones and dictated English sentences to ensure focused handwriting and the evaluator recorded all process. These video recordings of handwriting sessions were analyzed for frontal plane head movements using Kinovea software. The Wilcoxon signed-rank test was applied to reveal the group differences in tablet tilt angle, total head movement (THM), horizontal head movement (HHM), and vertical head movement (VHM). Results: There were no significant differences between the neck pain and no neck pain groups in tablet tilt angle or HHM (p > 0.05). In contrast, the neck pain group exhibited significantly greater THM (p < 0.001) and VHM (p < 0.01). Conclusion: The findings of this study indicate no significant relationship between neck pain and tablet tilt angle or HHM, but a significant association with increased VHM and THM. These findings provide basic knowledge for understanding movement patterns in individuals with neck pain.

라이브 스트림 커머스는 엔터테인먼트, 사회적 상호작용, 실시간 구매를 통합하여 디지털 소매업 의 판도를 변화시키고 있으며, 이로써 독특한 쇼핑 경험을 제공하고 있다. 본 연구는 감각적, 인지 적, 정서적, 행동적, 관계적 차원으로 구성된 고객 경험이 이러한 새로운 환경에서 소비자의 재구 매 의도에 어떠한 영향을 미치는지 확인하고자 한다. 특히, 상호 이해, 상호 호혜, 조화로운 관계에 기반하여 실시간 상호작용을 통해 빠르게 형성되는 대인 관계인 ‘스위프트 관시(swift guanxi)’가 중요한 개념으로 부각되고 있으며, 이는 소비자와 스트리머 간의 실시간 상호작용 속에서 형성된 다. 이에 본 연구는 사회적 교환 이론에 근거하여 스위프트 관시가 이러한 관계를 어떻게 조절하는 지 탐색하고자 한다. 이를 위해 라이브 커머스 사용 경험이 있는 중국 소비자를 대상으로 설문조사 를 실시하였으며, 회수된 361부를 바탕으로 회귀분석을 실시하였다. 분석 결과, 감각적, 인지적, 정서적, 행동적, 관계적 경험은 재구매 의도에 긍정적인 영향을 미치는 것으로 나타났다. 더불어, 스위프트 관시는 이러한 관계를 긍정적으로 조절하여 고객 경험이 재구매 의도에 미치는 영향을 강 화하는 것을 확인하였다. 본 연구는 사회적 교환 이론을 라이브 스트림 커머스 내 소비자 행동 분 야로 확장하고, 고객 경험을 감각적, 인지적, 정서적, 행동적, 관계적 차원으로 구분하여 재구매 의 도에 미치는 영향을 살펴보았다는 점에서 의의가 있다. 또한, 기존 관시의 개념을 넘어, 온라인 상 황에서 빠르게 형성되는 신뢰 기반의 관계인 스위프트 관시가 고객 경험과 재구매 의도의 관계에 미치는 조절효과를 살펴보았다는 점에서 의의가 있을 것으로 기대된다. 이는, 문화적 및 사회적 상 호작용의 특성을 기반으로 중국의 라이브 스트림 커머스 내 소비자 행동에 대한 보다 폭넓은 이해 를 제공할 수 있을 것으로 기대된다.

Background: The progressive digitalization of contemporary life, coupled with prolonged sedentary behavior, has contributed to the widespread occurrence of forward head posture (FHP) in the general population. Among the various exercise interventions aimed at correcting FHP, stretching exercises and proprioceptive training have garnered significant attention. Objectives: To investigate the effects of stretching exercises and proprioceptive training on craniovertebral angle (CVA), an indicator of forward head posture (FHP), and on the muscle tone of the suboccipital muscles. Design: Randomized controlled trial. Methods: Thirty participants were randomly assigned to either the stretching exercise group (n=15) or the proprioceptive training group (n=15), and each group underwent intervention three times per week for six weeks. CVA and muscle tone of the suboccipital muscles were measured before and after the six-week intervention, and the results were statistically analyzed for comparison. Results: Both groups showed a significant increase in CVA after the intervention (P<.05), with no significant difference between the groups. The muscle tone of the suboccipital muscles did not show statistically significant changes either within or between the groups. Conclusion: Six weeks of stretching exercise and proprioceptive training both resulted in a significant increase in CVA, demonstrating that both interventions are effective in improving FHP. However, neither intervention produced significant changes in the muscle tone of the suboccipital muscles.

The objective of this study was to assess the effects of gypsum application on dry matter yield (DMY), mineral content of alfalfa (Medicago sativa L.), and soil properties in reclaimed tidal land in South Korea. The experiment was conducted in Seokmun, located on the west coast of South Korea, which is reclaimed with approximately 70 cm depth of degraded island soil. Treatments consisted of a control with no gypsum application (G0), 2 ton ha-1 (G2), and 4 ton ha-1 (G4) of gypsum application. The first harvest was carried out when the alfalfa reached 10% flowering, and subsequent harvests were conducted at 35-day intervals. Over the three-year experimental periods (2019-2021), the total DMY of G2 treatment was significantly higher than those of G0 and G4 (p<0.05). Although both G2 and G4 gypsum application treatments lowered soil pH, the G4 treatment increased the electrical conductivity (EC) content of the soil. Additionally, gypsum application affected the mineral contents of alfalfa, resulting in reduced concentration of sodium (Na) and Magnesium (Mg). Therefore, this present study suggests that a gypsum application rate of 2 ton ha-1 is optimal for improving alfalfa dry matter yield and mineral balance, as well as enhancing soil chemical properties in reclaimed tidal land in South Korea.