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Showing 1 to 12 of 235 entries
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Event driven 4D STEM acquisition with a Timepix3 detector: Microsecond dwell time and faster scans for high precision and low dose applications

Theoretical frames STEM

Béché A, Hofer C, Jannis D, Xie X.
GSID: U_UAl6FEZxcJ
D Jannis, C Hofer, C Gao, X Xie, A Béché… - Ultramicroscopy, 2022 - Elsevier

… a size of 55 × 55 μ m , resulting in a theoretical capacity of 80 × 10 6 counts per second for a single … fixed focus multi-frame acquisition used in this work, between each frame the...

SU-E-J-58: Patient-Specific Biomechanical Head and Neck Models for Interfraction Dose Accumulation.

Medical physics

Santhanam A, Ennis D, Low D, Kupelian P.
PMID: 28517590
Med Phys. 2012 Jun;39(6):3665. doi: 10.1118/1.4734893.

PURPOSE: In this abstract, we discuss a biomechanical head and neck model that will be able to represent patient setup variations as well as physiologic changes and subsequently enable dose calculations on the deformed anatomy.METHODS: We selected Multi Pose...

Concentration measurement of gas embedded in scattering media by employing absorption and time-resolved laser spectroscopy.

Applied optics

Somesfalean G, Sjöholm M, Alnis J, af Klinteberg C, Andersson-Engels S, Svanberg S.
PMID: 12078678
Appl Opt. 2002 Jun 20;41(18):3538-44. doi: 10.1364/ao.41.003538.

Diode-laser-based absorption spectroscopy for the evaluation of embedded gas concentrations in porous materials is demonstrated in measurements of molecular oxygen dispersed throughout scattering polystyrene foam, used here as a generic test material. The mean path length of light scattered...

Analysis of gas dispersed in scattering media.

Optics letters

Sjöholm M, Somesfalean G, Alnis J, Andersson-Engels S, Svanberg S.
PMID: 18033492
Opt Lett. 2001 Jan 01;26(1):16-8. doi: 10.1364/ol.26.000016.

Monitoring of free gas embedded in scattering media, such as wood, fruits, and synthetic materials, is demonstrated by use of diode laser spectroscopy combined with sensitive modulation techniques. Gas detection is made possible by the contrast of the narrow...

Frequency-modulation spectroscopy with blue diode lasers.

Applied optics

Gustafsson U, Somesfalean G, Alnis J, Svanberg S.
PMID: 18349953
Appl Opt. 2000 Jul 20;39(21):3774-80. doi: 10.1364/ao.39.003774.

Frequency-modulation spectroscopy provides ultrasensitive absorption measurements. The technique is especially adaptable to diode lasers, which can be modulated easily, and has been used extensively in the near-infrared and infrared spectral regions. The availability of blue diode lasers now means...

Copper-catalyzed enantioselective hydrogenation of ketones.

Chemistry (Weinheim an der Bergstrasse, Germany)

Junge K, Wendt B, Addis D, Zhou S, Das S, Fleischer S, Beller M.
PMID: 21207606
Chemistry. 2011 Jan 03;17(1):101-5. doi: 10.1002/chem.201002311. Epub 2010 Nov 30.

No abstract available.

Low phase noise diode laser oscillator for 1S-2S spectroscopy in atomic hydrogen.

Optics letters

Kolachevsky N, Alnis J, Parthey CG, Matveev A, Landig R, Hänsch TW.
PMID: 22048397
Opt Lett. 2011 Nov 01;36(21):4299-301. doi: 10.1364/OL.36.004299.

We report on a low-noise diode laser oscillator at 972 nm actively stabilized to an ultrastable vibrationally and thermally compensated reference cavity. To increase the fraction of laser power in the carrier we designed a 20 cm long external...

Precision measurement of the hydrogen-deuterium 1S-2S isotope shift.

Physical review letters

Parthey CG, Matveev A, Alnis J, Pohl R, Udem T, Jentschura UD, Kolachevsky N, Hänsch TW.
PMID: 20867231
Phys Rev Lett. 2010 Jun 11;104(23):233001. doi: 10.1103/PhysRevLett.104.233001. Epub 2010 Jun 07.

Measuring the hydrogen-deuterium isotope shift via two-photon spectroscopy of the 1S-2S transition, we obtain 670,994,334,606(15) Hz. This is a 10-times improvement over the previous best measurement [A. Huber, Phys. Rev. Lett. 80, 468 (1998)] confirming its frequency value. A...

Psychological and sociodemographic predictors of premature discontinuation of a 1-year multimodal outpatient weight-reduction program: an attrition analysis.

Patient preference and adherence

Ahnis A, Riedl A, Figura A, Steinhagen-Thiessen E, Liebl ME, Klapp BF.
PMID: 22442628
Patient Prefer Adherence. 2012;6:165-77. doi: 10.2147/PPA.S28022. Epub 2012 Mar 07.

OBJECTIVE: Attrition rates of up to 77% have been reported in conservative weight-reduction programs for the treatment of obesity. In view of the cost of such programs to the health system, there is a need to identify the variables...

Bilateral adrenal incidentalomas: a case report and review of diagnostic challenges.

Case reports in endocrinology

Carlson AL, Marney AM, Anderson SR, Gilbert MP.
PMID: 23401807
Case Rep Endocrinol. 2013;2013:953052. doi: 10.1155/2013/953052. Epub 2013 Jan 17.

Incidentally discovered adrenal masses (incidentalomas) are common and present challenges both in diagnosis and management. When incidentally discovered adrenal masses are bilateral, a refined diagnostic approach is warranted since bilateral disease is more likely to be pathologic. We review...

A Collection of Pseudo-Words to Study Multi-Talker Speech Intelligibility without Shifts of Spatial Attention.

Frontiers in psychology

Allen K, Alais D, Carlile S.
PMID: 22435061
Front Psychol. 2012 Mar 15;3:49. doi: 10.3389/fpsyg.2012.00049. eCollection 2012.

A new collection of pseudo-words was recorded from a single female speaker of American English for use in multi-talker speech intelligibility research. The pseudo-words (known as the KARG collection) consist of three groups of single syllable pseudo-words varying only...

Experimental upper limit to the galactic stellar-collapse rate.

Physical review letters

Annis J, Becker-Szendy R, Bratton CB, Casper D, Claus R, Crouch M, Dye ST, Errede S, Gajewski W, Goldhaber M, Haines TJ, Jones TW, Kielczewska D, Kropp WR, Learned JG, LoSecco JM, Matthews J, McGrew C, Mudan MS, Price LR, Reines F, Schultz J, Seidel S, Sinclair D, Sobel HW, Stone JL, Sulak LR, Svoboda R, Thornton G, van der Velde JC.
PMID: 10039848
Phys Rev Lett. 1989 May 01;62(18):2069-2072. doi: 10.1103/PhysRevLett.62.2069.

No abstract available.

Showing 1 to 12 of 235 entries