NASA's New Orbital Space Plane

2003 ◽  
Author(s):  
Stephan Davis ◽  
Leah Engler ◽  
Mark Fisher ◽  
Dan Dumbacher ◽  
Barry Boswell
Keyword(s):  
Orbital Space

scholarly journals Computerized Tomography-Guided Core-Needle Biopsy of Orbital Space-Occupying Lesions: A Case Series

2020 ◽  
pp. 1-8
Author(s):  
Bashar M. Bata ◽  
Andrew Martin ◽  
Daniel Connolly ◽  
Hardeep Singh Mudhar ◽  
Naomi Hersey ◽  
...  
Keyword(s):  
Computerized Tomography ◽  
Neuroendocrine Tumour ◽  
Case Series ◽  
B Cell Lymphoma ◽  
Major Surgery ◽  
Open Biopsy ◽  
Core Needle ◽  
Peribulbar Block ◽  
Orbital Space ◽  
Mass Lesions

<b><i>Purpose:</i></b> To describe our experience in performing biopsy of post-septal orbital masses with core needle under computerized tomography guidance (CT-CNB). <b><i>Methods:</i></b> The medical records of all patients who underwent this procedure were reviewed. The procedure was performed under local anesthesia on a day case basis under a peribulbar block. A planning non-contrast computerized tomography (CT) scan of the orbits was performed to localise the mass. A 6-cm 18-G Temno Evolution® semi-automated biopsy needle was inserted through the skin into the orbit. Prior to further advancement of the needle, a low-dose CT limited to the previously determined plane was performed to confirm its position. The needle was then advanced, and the cutting needle was deployed to obtain the biopsy. <b><i>Results:</i></b> Five patients who underwent CT-CNB were identified. The CNB was successful in 4 patients and revealed a metastatic prostate adenocarcinoma, diffuse large B-cell lymphoma, a metastatic neuroendocrine tumour, and orbital inflammatory disease. The biopsy failed in the fifth patient when the needle failed to penetrate the tumour despite good localisation on CT. He was eventually diagnosed with fibrous meningioma of the greater wing of sphenoid on open biopsy. None of the patients had any complications other than peri-ocular bruising which was present in all of them. <b><i>Conclusion:</i></b> CT-CNB of mass lesions located in the lateral aspect of the orbit can be an alternative to open biopsy in selected cases. It avoids major surgery and allows the use of radiotherapy, if required, without any delay.

scholarly journals Multiorbital singlet pairing and d + d superconductivity

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Emilian M. Nica ◽  
Qimiao Si
Keyword(s):  
Time Reversal ◽  
Heavy Fermion ◽  
Degrees Of Freedom ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Matrix Structure ◽  
Spin Singlet ◽  
Low Energies ◽  
Triplet Pairing ◽  
Orbital Space

AbstractRecent experiments in multiband Fe-based and heavy-fermion superconductors have challenged the long-held dichotomy between simple s- and d-wave spin-singlet pairing states. Here, we advance several time-reversal-invariant irreducible pairings that go beyond the standard singlet functions through a matrix structure in the band/orbital space, and elucidate their naturalness in multiband systems. We consider the sτ3 multiorbital superconducting state for Fe-chalcogenide superconductors. This state, corresponding to a d + d intra- and inter-band pairing, is shown to contrast with the more familiar d + id state in a way analogous to how the B- triplet pairing phase of 3He superfluid differs from its A- phase counterpart. In addition, we construct an analog of the sτ3 pairing for the heavy-fermion superconductor CeCu2Si2, using degrees-of-freedom that incorporate spin-orbit coupling. Our results lead to the proposition that d-wave superconductors in correlated multiband systems will generically have a fully-gapped Fermi surface when they are examined at sufficiently low energies.

Optimized virtual orbital space for high‐level correlated calculations

1987 ◽  
Vol 86 (11) ◽  
pp. 6314-6324 ◽  
Author(s):  
Ludwik Adamowicz ◽  
Rodney J. Bartlett
Keyword(s):  
Virtual Orbital ◽  
Orbital Space ◽  
High Level
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