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Hendon, Christopher H.,Yang, Ruo Xi,Burton, Lee A.,Walsh, Aron The Royal Society of Chemistry 2015 Journal of materials chemistry. A, Materials for e Vol.3 No.17
<▼1><P>The incorporation of tetrafluoroborate and hexafluorophosphate in halide perovskites is found to result in substantial band gap widening.</P></▼1><▼2><P>Halide perovskites have attracted attention for light-to-electricity conversion in solar cells due to their favorable optoelectronic properties. In particular, the replacement of the A cation by an isovalent molecule has proven highly successful. We explore the substitution of the X anion, producing polyanion perovskites based on hexafluorophosphate and tetrafluoroborate. Starting from CsPbI3, the effect of partial and complete substitution is investigated using relativistic electronic structure calculations. BF4<SUP>−</SUP> results in a larger perturbation to the electronic structure than PF6<SUP>−</SUP>; however, both localise the band edge states, and the end member compounds are predicted to be wide band gap dielectrics.</P></▼2>
강지인,Naobumi Hosogane,Christopher Ames,Frank Schwab,Robert Hart,Douglas Burton,Christopher Shaffrey,Justin S. Smith,Shay Bess,조규정,하윤 대한척추신경외과학회 2018 Neurospine Vol.15 No.4
Objective: This study is aimed to investigate whether surgical strategies for adult spinal deformity (ASD) treatment differed among Korean physicians. Methods: This study is retrospective questionnaire-based study. ASD is challenging to manage, with a broad range of clinical and radiological presentations. To investigate possible nationality- or ethnicity-related differences in the surgical strategies adopted for ASD treatment, the International Spine Study Group surveyed physicians’ responses to 16 cases of ASD. We reviewed the answers to this survey from Korean physicians. Korean orthopedic surgeons (OS) and neurosurgeons (NS) received a questionnaire containing 16 cases and response forms via email. After reviewing the cases, physicians were asked to indicate whether they would treat each case with decompression or fusion. If fusion was chosen, physicians were also asked to indicate whether they would perform 3-column osteotomy. Retrospective chi-square analyses were performed to investigate whether the answers to each question differed according to training specialty or amount of surgical experience. Results: Twenty-nine physicians responded to our survey, of whom 12 were OS and 17 were NS. In addition, 18 (62.1%) had more than 10 years of experience in ASD correction and were assigned to the M10 group, while 11 (37.9%) had less than 10 years of experience and were assigned to the L10 group. We found that for all cases, the surgical strategies favored did not significantly differ between OS and NS or between the M10 and L10 groups. However, for both fusion surgery and 3-column osteotomy, opinions were divided regarding the necessity of the procedures in 4 of the 16 cases. Conclusion: The surgical strategies favored by physicians were similar for most cases regardless of their training specialty or experience. This suggests that these factors do not affect the surgical strategies selected for ASD treatment, with patient clinical and radiological characteristics having greater importance.
IRAS 15099-5856: Remarkable Mid-Infrared Source with Prominent Crystalline Silicate Emission
Bon-Chul Koo,Christopher F. McKee,Kyung-Won Suh,Dae-Sik Moon,Michael G. Burton,Masaaki Hiramatsu,Michael S. Bessel,Takashi Onaka,Hyun-Jeong Kim,Woong-Seob Jeong,Bryan Gaensler,Myungshin Im,Ho-Gyu Lee 한국천문학회 2010 天文學會報 Vol.35 No.1
Koo, Bon-Chul,McKee, Christopher F.,Suh, Kyung-Won,Moon, Dae-Sik,Onaka, Takashi,Burton, Michael G.,Hiramatsu, Masaaki,Bessell, Michael S.,Gaensler, B. M.,Kim, Hyun-Jeong,Lee, Jae-Joon,Jeong, Woong-Seo IOP Publishing 2011 The Astrophysical journal Vol.732 No.1
<P>We report new mid-infrared (MIR) observations of the remarkable object IRAS 15099-5856 using the space telescopes AKARI and Spitzer, which demonstrate the presence of prominent crystalline silicate emission in this bright source. IRAS 15099-5856 has a complex morphology with a bright central compact source (IRS1) surrounded by knots, spurs, and several extended (similar to 4') arc-like filaments. The source is seen only at >= 10 mu m. The Spitzer mid-infrared spectrum of IRS1 shows prominent emission features from Mg-rich crystalline silicates, strong [Ne II] 12.81 mu m, and several other faint ionic lines. We model the MIR spectrum as thermal emission from dust and compare with the Herbig Be star HD 100546 and the luminous blue variable R71, which show very similar MIR spectra. Molecular line observations reveal two molecular clouds around the source, but no associated dense molecular cores. We suggest that IRS1 is heated by UV radiation from the adjacent O star Muzzio 10 and that its crystalline silicates most likely originated in a mass outflow from the progenitor of the supernova remnant (SNR) MSH 15-52. IRS1, which is embedded in the SNR, could have been shielded from the SN blast wave if the progenitor was in a close binary system with Muzzio 10. If MSH 15-52 is a remnant of Type Ib/c supernova (SN Ib/c), as has been previously proposed, this would confirm the binary model for SN Ib/c. IRS1 and the associated structures may be the relics of massive star death, as shaped by the supernova explosion, the pulsar wind, and the intense ionizing radiation of the embedded O star.</P>
Sebastian Decker,Renaud Lafage,Christian Krettek,Robert Hart,Christopher Ames,Justin S. Smith,Douglas Burton,Eric Klineberg,Shay Bess,Frank J. Schwab,Virginie Lafage,International Spine Study Group 대한척추외과학회 2020 Asian Spine Journal Vol.14 No.2
Study Design: Retrospective cohort study. Purpose: To investigate the role of sacral extension (SE) for the development of proximal junctional kyphosis (PJK) in adult spinal deformity (ASD) surgery. Overview of Literature: The development of PJK is multifactorial and different risk factors have been identified. Of these, there is some evidence that SE also affects the development of PJK, but data are insufficient. Methods: Using a combined database comprising two propensity-matched groups of fusions following ASD surgery, one with fixation to S1 or S1 and the ilium (SE) and one without SE but with a lower instrumented vertebra of L5 or higher (lumbar fixation, LF), PJK and the role of further parameters were analyzed. The propensity-matched variables included age, the upper-most instrumented vertebra (UIV), preoperative sagittal alignment, and the baseline to 1 year change of the sagittal alignment. Results: Propensity matching led to two groups of 89 patients each. The UIV, pelvic incidence minus lumbar lordosis, sagittal vertical axis, pelvic tilt, age, and body mass index were similar in both groups (p>0.05). The incidence of PJK at postoperative 1 year was similar for SE (30.3%) and LF (22.5%) groups (p=0.207). The PJK angle was comparable (p=0.963) with a change of −8.2° (SE) and −8.3° (LF) from the preoperative measures (p=0.954). A higher rate of PJK after SE (p=0.026) was found only in the subgroup of patients with UIV levels between T9 and T12. Conclusions: Instrumentation to the sacrum with or without iliac extension did not increase the overall risk of PJK. However, an increased risk for PJK was found after SE with UIV levels between T9 and T12.
eHealth Support for People with Depression in the Community: A Case Study Series
Maria KWolters,Aurora Szentagotai Tatar,Silviu Matu,Ramona Moldovan,Daniel David,Brian H McKinstry,Christopher D Burton 한국HCI학회 2014 한국HCI학회 학술대회 Vol.2014 No.12
Major Depressive Disorder (MDD) is a chronic mental health condition that affects quality of life and morbidity. Help4Mood is a novel intervention designed to support the treatment of people withMDDin the community. It combines monitoring of objective symptoms such as activity levels and speech patterns with monitoring of subjective symptoms such as self reported mood and thinking patterns. Help4Mood was developed iteratively in collaboration with clinicians and people with depression. In this paper, we discuss our overall approach and present the results of four case studies where people with depression tested a near-final prototype of Help4Mood for two weeks.
Justin K. Scheer,Justin S. Smith,Peter G. Passias,Han Jo Kim,Shay Bess,Douglas C. Burton,Eric O. Klineberg,Virginie Lafage,Munish Gupta,Christopher P. Ames 대한척추신경외과학회 2023 Neurospine Vol.20 No.3
Objective: The goal of this study was to determine if patients with mild scoliosis and ageappropriate sagittal alignment have favorable outcomes following surgical correction. Methods: Retrospective review of a prospective, multicenter adult spinal deformity database. Inclusion criteria: operative patients age ≥18 years, and preoperative pelvic tilt, mismatch between pelvic incidence and lumbar lordosis (PI–LL), and C7 sagittal vertical axis all within established age-adjusted thresholds with minimum 2-year follow-up. Health-related quality of life (HRQoL) scores: Oswestry Disability Index (ODI), 36-item Short Form health survey (SF-36), Scoliosis Research Society-22R (SRS22R), back/leg pain Numerical Rating Scale and minimum clinically important difference (MCID)/substantial clinical benefit (SCB). Two-year and preoperative HRQoL radiographic data were compared. Patients with mild scoliosis (Mild Scoli, Max coronal Cobb 10°–30°) were compared to those with larger curves (Scoli). Results: One hundred fifty-one patients included from 667 operative patients (82.8% women; average age, 56.4 ± 16.2 years). Forty-two patients (27.8%) included in Mild Scoli group. Mild Scoli group had significantly worse baseline leg pain, ODI, and physical composite scores (p < 0.02). Mean 2-year maximum coronal Cobb angle was significantly improved compared to baseline (p < 0.001). All 2-year HRQoL measures were significantly improved compared to (p < 0.001) except mental composite score, SRS activity and SRS mental for the Mild Scoli group (p > 0.05). From the mild Scoli group, 36%–74% met either MCID or SCB for the HRQoL measures. Sixty-four point three percent had minimum 1 complication, 28.6% had a major complication, 35.7% had reoperation. Conclusion: Mild scoliosis patients with age-appropriate sagittal alignment benefit from surgical correction, decompression, and stabilization at 2 years postoperative despite having a high complication rate.