http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Local Signs and Symptoms in Spontaneous Cervical Artery Dissection: A Single Centre Cohort Study
Lukas Mayer,Christian Boehme,Thomas Toell,Benjamin Dejakum,Johann Willeit,Christoph Schmidauer,Klaus Berek,Christian Siedentopf,Elke Ruth Gizewski,Gudrun Ratzinger,Stefan Kiechl,Michael Knoflach 대한뇌졸중학회 2019 Journal of stroke Vol.21 No.1
.
부소영(Soyoung Bu),Stefan Boehm,Miguel Portela,조현제(Hyunjei Jo) 한국정보과학회 2007 한국정보과학회 학술발표논문집 Vol.34 No.1C
본 논문에서는 제품 공정에서 스타일링과 디자인 과정에서 제작하게 되는 다양한 재질의 Digital-Mockup을 품평하기 위한 시스템을 제안한다. 타일드 디스플레이, 워크벤치, 혼합현실 디스플레이, 데스크탑 디스플레이와 같은 여러 가상 환경에서의 다자간 연결을 통해 원거리 참여자들이 공유된 시각 작업공간상에서 원활한 협업을 수행할 수 있도록 지원한다. 또한 모바일을 이용하여 씬-그래프(scenegraph)에 나타나는 3차원 제품 모델의 재질 정보를 실시간으로 변경이 가능하다.
Hye-Jeong Choi(최혜정),Meggen R. Boehm 한국교육평가학회 2007 교육평가연구 Vol.20 No.1
이 연구의 목적은 잠재성장모형에서 WLSMV와 ML의 결과를 시뮬레이션 연구를 통해서 비교하고자 하는 것이다. 반복측정의 현실적 조건을 고려하여 표집의 크기를 50, 100, 200, 400로, 성장패턴은 선형성장으로 제한하였다. 이 연구에서 주요 관심 추정치는 성장률의 평균, 성장률과 초기상태의 변량, 그리고 성장률과 초기상태의 공변량에 대한 추정치이다. 시뮬레이션 연구 결과 두 추정방법 모두 조금씩 편파적 추정치를 산출하였다. WLSMV 추정법은 표집의 크기가 커짐에 따라서 추정치들이 모수치에 매우 근접하였으나, ML 추정법은 표집이 상대적으로 큰 경우에도 추정치의 편파성이 크게 줄어들지 않았다. WLSMV와 ML 모두 표집의 크기가 늘어나는 경우 표집오차는 줄어들었다. 모델의 적합성 지수인 RMSEA는 WLSMV에서 비교적 정확한 정보를 제공하는 반면 ML에서는 1종 오류가 높아, 적합한 모델을 기각하는 경우가 빈번하였다. 두 추정방법을 실제 자료에 적용한 경우, 예상했던 바와 같이 추정치들이 달랐으며 아동의 언어력 성장 형태에 대해 서로 다른 결론을 유출하였다. 이 연구를 통해서 불편추정치를 얻기 위해서표집의 크기가 적어도 200명 정도 필요하며, 모수추정 방법을 선택함에 있어서 자료의 특징을 고려해야 함을 확인 할 수 있었다. The purpose of this study was to compare mean and variance adjusted weighted least squares (WLSMV) and maximum likelihood (ML) estimation methods with categorical repeated measures in latent growth modeling.<BR> We performed a simulation study using Mplus 3.0.Two estimators were compared across four sample sizes: 50, 100, 200, and 400. For the simplicity"s sake, we dealt with only a linear growth pattern. We also applied two estimators to real data with similar conditions to the simulated data.<BR> Regardless of estimators, all estimates were at least slightly biased. Particular focus was placed on four parameters: the mean of slope (LC), the variances of intercept (IS) and slope (LC), and the covariance between IS and LC. For WLSMV these estimates were biased positively. The bias for the variance of the LC was dramatically decreased as the sample size increased. On the contrary, ML estimates showed severe negative bias except for the mean of IS. One important finding is that this severe bias in ML estimates was not reduced even when the sample size increased. And ML results in lower standard errors of estimates than WLSMV. Increasing sample size result in decreasing in standard error for both WLSMV and ML. Chi-square as a model fit index tends to over-reject the true model in ML and is greatly influenced by sample size. RMSEA functions very well for WLSMV estimation and does not work well for ML estimation. In addition, as expected, two estimators leaded two different conclusions on the growth pattern of the nonsense word fluency (DIBELS) of first graders.<BR> From this study, we recommend in order to obtain unbiased estimates for latent growth model, at least sample size of 200 is needed for either estimator and to be careful to choose an estimator based on data under investigation.
Diana Crisan,Amir Shaban,Amelia Boehme,Perry Dubin,Jenifer Juengling,Laurie A. Schluter,Karen C. Albright,T. Mark Beasley,Sheryl Martin-Schild 대한재활의학회 2014 Annals of Rehabilitation Medicine Vol.38 No.4
Objective To determine predictors of early recovery of functional swallow in patients who had gastrostomy (percutaneous endoscopic gastrostomy [PEG]) placement for dysphagia and were discharged to inpatient rehabilitation (IPR) after stroke.Methods A retrospective study of prospectively identified patients with acute ischemic and hemorrhagic stroke from July 2008 to August 2012 was conducted. Patients who had PEG during stroke admission and were discharged to IPR, were studied. We compared demographics, stroke characteristics, severity of dysphagia, stroke admission events and medications in patients who remained PEG-dependent after IPR with those who recovered functional swallow.Results Patients who remained PEG dependent were significantly older (73 vs. 54 years, p=0.009). Recovery of swallow was more frequent for hemorrhagic stroke patients (80% vs. 47%, p=0.079). Age, adjusting for side of stroke (odds ratio [OR], 0.89; 95% confidence interval [CI], 0.82–0.98; p=0.016) and left-sided strokes, adjusting for age (OR, 15.15; 95% CI, 1.32–173.34; p=0.028) were significant predictors of swallow recovery. Patients who recovered swallowing by discharge from IPR were more likely to be discharged home compared to those who remained PEG-dependent (90% vs. 42%, p=0.009).Conclusion Younger age and left-sided stroke may be predictive factors of early recovery of functional swallow in patients who received PEG. Prospective validation is important as avoidance of unnecessary procedures could reduce morbidity and healthcare costs.
Alhashash Mohamed,Zentralklinik Bad Berka, Bad Berka, Germany,Boehm Heinrich,Shousha Mootaz 대한척추외과학회 2022 Asian Spine Journal Vol.16 No.1
Study Design: This is a retrospective study with a minimum follow-up of 2 years.Purpose: The aim of this study is to assess the long-term outcomes after performing the four-level anterior cervical discectomy and fusion (ACDF) in the treatment of degenerative cervical spine disease using stand-alone titanium cages.Overview of Literature: Over the last decades, a rapid increase in the use of stand-alone cages for ACDF has been observed. However, research on their application in the treatment of four-level diseases is insufficient.Methods: In this study, 130 patients presenting with symptomatic cervical spondylosis who underwent four-level ACDF using standalone cages in our institution between 2008 and 2016 were assessed. Fifty-two patients were women and 78 men with a mean age of 60.5 years. Their clinical and radiological outcomes were assessed. The results of the Neck Disability Index (NDI) and Visual Analog Scale as well as bony fusion were evaluated, and the revisions were analyzed. All of the patients underwent the four-level microscopic ACDF using the same titanium rectangular cage.Results: The mean follow-up was 47±11.4 months. A fusion of all four levels was achieved in 80.72% of the patients. In 25 patients (19.23%), an incomplete bony bridging was observed in at least one fusion level at the final follow-up. However, only two patients (1.5%) were symptomatic and underwent revision. The mean NDI improved significantly from 39.4±9.3 at presentation to 8.3±6.6 at the final follow-up. Cervical lordosis improved significantly from a mean of 5.5° preoperatively to a mean of 15° postoperatively. Cage sinking and loss of segment height during healing had a mean of 3 mm.Conclusions: Overall, the application of four-level ACDF using titanium cages in a stand-alone technique has been proven to be a safe and effective treatment method for degenerative disease. In a large cohort, a high rate of good long-term clinical and radiological results was achieved.