Publications by authors named "R E Frisch"
Investigating the Potential of Haptic Props for 3D Object Manipulation in Handheld AR.
IEEE Trans Vis Comput Graph
November 2024
The manipulation of virtual 3D objects is essential for a variety of handheld AR scenarios. However, the mapping of commonly supported 2D touch gestures to manipulations in 3D space is not trivial. As an alternative, our work explores the use of haptic props that facilitate direct manipulation of virtual 3D objects with 6 degrees of freedom.
View Article and Find Full Text PDFA new flexible germacranolide (, lobatolide H) was isolated from the aerial parts of . The structure elucidation was performed by classical NMR experiments and DFT NMR calculations. Altogether, 80 theoretical level combinations with existing C NMR scaling factors were tested, and the best performing ones were applied on .
View Article and Find Full Text PDFSeven new germacranolides (-, -), among them a heterodimer (), and known germacranolide (), eudesmane () and isodaucane () sesquiterpenes were isolated from the aerial parts of . Their structures were determined by using a combination of different spectroscopic methods, including HR-ESIMS and 1D and 2D NMR techniques supported by DFT-NMR calculations. The enantiomeric purity of the new compounds was investigated by chiral HPLC analysis, while their absolute configurations were determined by TDDFT-ECD and OR calculations.
View Article and Find Full Text PDFArticle Synopsis
- This study is a retrospective cohort analysis comparing outcomes of expandable versus static interbody spacers in patients with degenerative disc disease who underwent minimally invasive spine surgery.
- Results showed that patients with expandable spacers experienced significantly greater reductions in pain and disability scores at 6, 12, and 24 months compared to the static group.
- Additionally, while the static spacers had a greater improvement in disc height, the expandable spacers demonstrated a lower rate of implant subsidence over the 24-month follow-up period.
Study Design: Retrospective chart review.
Purpose: This study compared the clinical and radiographic outcomes of patients treated with expandable and static interbody spacers following minimally invasive lateral lumbar interbody fusion (MIS-LLIF) with 12-month follow-up.
Overview Of Literature: A common surgical option for the treatment of degenerative disk disease (DDD) is MIS-LLIF using static or expandable spacers to restore disk height (DH), neuroforaminal height (NH), and segmental lordosis.