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Yoon, Hyoseok,Kim, Siyeon,Oh, Haneol,Lim, Hong Ji Korea Multimedia Society 2021 The journal of multimedia information system Vol.8 No.4
Recent advances in Internet-of-Things and wearable computing have established computationally sufficient infrastructure to remove the barriers of physical locations. The recent COVID-19 pandemic has accelerated the use of remote collaboration, work-from-home, teleconferencing, online education, digital twin, and metaverse enriched with various configurations of augmented reality, virtual reality, mixed reality, and extended reality. Beyond specialized niche wearable applications in the medical and entertainment domains, we aim to identify the underlying characteristics of smartglass-enabled killer applications for everyday use. In this paper, we analyze intermediary roles in remote collaboration consisting of authoritative supervisors, synergetic collaborators, and speculative explorers. We also propose technical components for smartglass-assisted interactive remote collaboration composed of personal tracking, teleconference, and interaction components. More specifically, the application tasks of each intermediary role and objectives of three functional components are defined and elaborated.
Kang Hyoseok,Lim Taeha,Lee Hyun jeong,Kim Tae Wan,Kim Wan,Chang Hae Wone 대한마취통증의학회 2023 Anesthesia and pain medicine Vol.18 No.2
Background: Cesarean section under spinal anesthesia may cause anxiety and hypotension. Administration of sedative drugs after delivery can diminish these side-effects, but may increase hemodynamic instability. We evaluated the effect of the administration of 0.7 μg/kg dexmedetomidine and compared it with that of 0.03 mg/kg midazolam for usefulness of sedation of the parturient after delivery during cesarean section.Methods: After obtaining written consent and the ethics board approval, 60 parturients aged 20–43 years who underwent elective cesarean delivery under spinal anesthesia were recruited. A total of 0.5% hyperbaric bupivacaine (8–10 mg) and intrathecal fentanyl (10 μg) was given to induce anesthesia. Parturients were then randomly allocated to receive either midazolam (0.03 mg/kg; group M) or dexmedetomidine 0.7 (μg/kg; group D) after delivery. The primary outcome measure was patient satisfaction score. Secondary outcomes included vital signs; vasopressor dosage; incidence of shivering, nausea, and vomiting; incidence of bradycardia; time to sensory and motor recovery; postoperative nausea and vomiting score; and postoperative pain visual analog scale at 6, 24, and 48 h.Results: Satisfaction scores for sedation were similar between the two groups. The systolic blood pressure, heart rate, oximetry saturation, and tympanic temperature were comparable between the two groups. The predicted mean systolic blood pressure of group D was 106.3 mmHg and that of group M was 107.5 mmHg. Both groups showed comparable adverse intraoperative and postoperative outcomes.Conclusions: Dexmedetomidine and midazolam showed similar hemodynamic effects and patient satisfaction in parturients under spinal anesthesia.
Song, Hyoseok,Jeon, Heeyoung,Shin, Changhee,Shin, Seokyoon,Jang, Woochool,Park, Joohyun,Chang, Jaewan,Choi, Jae Hyoung,Kim, Younsoo,Lim, HanJin,Seo, Hyungtak,Jeon, Hyeongtag Elsevier S.A. 2016 Thin Solid Films Vol.619 No.-
<P><B>Abstract</B></P> <P>In this study, we report the effect of process conditions on the crystallinity and energy band structure of atomic layer deposition (ALD) ZrO<SUB>2</SUB> films deposited, using tris(dimethylamino) cyclopentadienyl zirconium as a precursor and ozone as a reactant. ZrO<SUB>2</SUB> films exhibited systematic changes in phase and energy band gap as a function of the ozone concentration. The crystal phase was transformed from the monoclinic phase to a tetragonal phase in the presence of higher ozone concentrations. In addition, spectroscopic ellipsometry measurements showed that the optical band gap and oxygen vacancy defects decreased with increasing ozone concentration. The valence band maximum also shifted closer to the Fermi energy level with increasing ozone concentration. The change in electronic structure driven by a high concentration of ozone led to reduced leakage current density and a high dielectric constant in the ZrO<SUB>2</SUB>-based metal-insulator-metal capacitors. These improvements were not observed for depositions performed using conventional ZrO<SUB>2</SUB> ALD with oxygen and water reactants.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We report the effect of ozone concentration on the properties of ZrO<SUB>2</SUB> thin films. </LI> <LI> The ZrO<SUB>2</SUB> at higher O<SUB>3</SUB> transformed from a monoclinic phase to a tetragonal phase. </LI> <LI> The ZrO<SUB>2</SUB> at higher O<SUB>3</SUB> concentration showed the reduced leakage current. </LI> <LI> The ZrO<SUB>2</SUB> at higher O<SUB>3</SUB> concentration showed the higher dielectric constant. </LI> </UL> </P>
환기보조를 받는 근위축성 측색 경화증 환자에서 시행한 지속적 경막외 마취
( Young-seob Lim ),( Hyoung-gyun Kim ),( Hyoseok Kang ) 경희대학교 경희의료원 2019 慶熙醫學 Vol.34 No.1
Background: Amyotrophic lateral sclerosis (ALS) is chronic progressive motor neuron disorder, not affecting sensory and autonomic function. As the disease progresses, a respiratory depression appears. Anesthesia and postoperative pain control in patient with ALS is challenging problems. Case Report: 56 years old man was scheduled for open reduction and internal fixation on the left distal femur. He was diagnosed with Lou Gehrig’s Disease 10 years ago, and had tracheostomy 4 years ago. He used home ventilator and was unable to move by himself below the neck and. We chose epidural anesthesia with catheter to control the pain during the surgery and postoperative period. His home ventilator was to be used during surgery. Blocked sensory level was T12 by 0.75% hyperbaric ropivacaine 10 mL and he was stable during surgery. After 48 hours epidural catheter removed, no aggravation of neurologic and respiratory signs or symptoms were noted until he discharged. Discussion: ALS is characterized as neurodegenerative disease. Patient is progressively paralyzed while remaining fully alert. Respiratory failure is the main cause of death of ALS. General anesthesia can cause the increase in weakness of the respiratory function. Spinal and epidural anesthesia are not contraindication in ALS, and there is no data that spinal epidural anesthesia deteriorates neurologic function in patients with degenerative disease. Conclusion: ALS patient receiving ventilatory support successfully underwent the operation on the left distal femur under continuous epidural anesthesia without neurologic and respiratory aggravation.