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Showing 1 to 12 of 304 entries
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A new dynamic model of three cell interactions for CTL responses.

Oncoimmunology

Ahmed KA, Wang L, Xiang J.
PMID: 23243618
Oncoimmunology. 2012 Nov 01;1(8):1430-1432. doi: 10.4161/onci.21175.

The exact mechanisms of CD4 help in the generation of memory cytotoxic T lymphocytes (CTLs) remain largely illusive. We propose that dendritic cells (DCs) first interact with CD4(+) T cells, resulting in DC licensing and CD4(+) T-cell priming. Thereafter,...

Universal slip dynamics in metallic glasses and granular matter - linking frictional weakening with inertial effects.

Scientific reports

Denisov DV, Lőrincz KA, Wright WJ, Hufnagel TC, Nawano A, Gu X, Uhl JT, Dahmen KA, Schall P.
PMID: 28262791
Sci Rep. 2017 Mar 06;7:43376. doi: 10.1038/srep43376.

Slowly strained solids deform via intermittent slips that exhibit a material-independent critical size distribution. Here, by comparing two disparate systems - granular materials and bulk metallic glasses - we show evidence that not only the statistics of slips but...

Integration of Continuous-Time Dynamics in a Spiking Neural Network Simulator.

Frontiers in neuroinformatics

Hahne J, Dahmen D, Schuecker J, Frommer A, Bolten M, Helias M, Diesmann M.
PMID: 28596730
Front Neuroinform. 2017 May 24;11:34. doi: 10.3389/fninf.2017.00034. eCollection 2017.

Contemporary modeling approaches to the dynamics of neural networks include two important classes of models: biologically grounded spiking neuron models and functionally inspired rate-based units. We present a unified simulation framework that supports the combination of the two for...

Experiments and Model for Serration Statistics in Low-Entropy, Medium-Entropy, and High-Entropy Alloys.

Scientific reports

Carroll R, Lee C, Tsai CW, Yeh JW, Antonaglia J, Brinkman BA, LeBlanc M, Xie X, Chen S, Liaw PK, Dahmen KA.
PMID: 26593056
Sci Rep. 2015 Nov 23;5:16997. doi: 10.1038/srep16997.

High-entropy alloys (HEAs) are new alloys that contain five or more elements in roughly-equal proportion. We present new experiments and theory on the deformation behavior of HEAs under slow stretching (straining), and observe differences, compared to conventional alloys with...

Analysis of grain boundary dynamics using event detection and cumulative averaging.

Ultramicroscopy

Gautam A, Ophus C, Lançon F, Denes P, Dahmen U.
PMID: 25498139
Ultramicroscopy. 2015 Apr;151:78-84. doi: 10.1016/j.ultramic.2014.11.008. Epub 2014 Nov 26.

To analyze extended time series of high resolution images, we have employed automated frame-by-frame comparisons that are able to detect dynamic changes in the structure of a grain boundary in Au. Using cumulative averaging of images between events allowed...

Inkjet printable luminescent Eu3+-TiO2 doped in sol gel matrix for paper tagging.

Journal of fluorescence

Attia MS, Elsaadany SA, Ahmed KA, El-Molla MM, Abdel-Mottaleb MS.
PMID: 25591996
J Fluoresc. 2015 Jan;25(1):119-25. doi: 10.1007/s10895-014-1488-7. Epub 2015 Jan 17.

Europium (III) with different concentrations (0.2, 0.4 and 0.8 %)-TiO(2) doped silica composite systems were sensitized by sol-gel method. Different spectroscopic and microscopic tools characterized the composites. The Europium ion incorporated into the liquid silica-titania solution acts as red...

Marker Detection in Electron Tomography: A Comparative Study.

Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada

Trampert P, Bogachev S, Marniok N, Dahmen T, Slusallek P.
PMID: 26601573
Microsc Microanal. 2015 Dec;21(6):1591-1601. doi: 10.1017/S1431927615015433. Epub 2015 Nov 25.

We conducted a comparative study of three widely used algorithms for the detection of fiducial markers in electron microscopy images. The algorithms were applied to four datasets from different sources. For the purpose of obtaining comparable results, we introduced...

Activity Learning as a Foundation for Security Monitoring in Smart Homes.

Sensors (Basel, Switzerland)

Dahmen J, Thomas BL, Cook DJ, Wang X.
PMID: 28362342
Sensors (Basel). 2017 Mar 31;17(4). doi: 10.3390/s17040737.

Smart environment technology has matured to the point where it is regularly used in everyday homes as well as research labs. With this maturation of the technology, we can consider using smart homes as a practical mechanism for improving...

Recommendations to enhance constructivist-based learning in Interprofessional Education using video-based self-assessment.

GMS journal for medical education

Dahmen U, Schulze C, Schindler C, Wick K, Schwartze D, Veit A, Smolenski U.
PMID: 27280144
GMS J Med Educ. 2016 Apr 29;33(2):Doc33. doi: 10.3205/zma001032. eCollection 2016.

INTRODUCTION: Interprofessional collaboration is crucial to the optimization of patient care.AIM: This paper aims to provide recommendations for implementing an innovative constructivist educational concept with the core element of video-based self-assessment.METHODOLOGY: A course for students in medicine, physiotherapy, and...

Synthesis and Crystal Structure Determination of Bifunctional Phosphine-Linked Triplatinum Double-Cluster Complexes.

Inorganic chemistry

Imhof D, Burckhardt U, Dahmen KH, Joho F, Nesper R.
PMID: 11669785
Inorg Chem. 1997 Apr 23;36(9):1813-1820. doi: 10.1021/ic960846x.

Reactions of [Pt(3)(&mgr;-CO)(3)(PCy(3))(3)] (1) and [Pt(3)(&mgr;-CNXyl)(2)(&mgr;-CO)(CNXyl)(PCy(3))(2)] (2) (Cy = C(6)H(11), Xyl = C(8)H(9)) with (1)/(2) equiv of a bifunctional metal phosphine cation [(MPR'(2))(2)(R)](2+) (M = Cu, Ag, Au; R = C(6)H(4), (CH(2))(2)C(6)H(4), Fe(C(5)H(5)); R' = C(6)H(5), C(6)H(11)) yielded quantitatively...

Driving rate effects on crackling noise.

Physical review letters

White RA, Dahmen KA.
PMID: 14525257
Phys Rev Lett. 2003 Aug 22;91(8):085702. doi: 10.1103/PhysRevLett.91.085702. Epub 2003 Aug 21.

Many systems respond to slowly changing external conditions with crackling noise, created by avalanches or pulses with a broad range of sizes. Examples range from Barkhausen noise (BN) in magnets to earthquakes. In this Letter, we discuss the effects...

Finite-frequency tomography reveals a variety of plumes in the mantle.

Science (New York, N.Y.)

Montelli R, Nolet G, Dahlen FA, Masters G, Engdahl ER, Hung SH.
PMID: 14657505
Science. 2004 Jan 16;303(5656):338-43. doi: 10.1126/science.1092485. Epub 2003 Dec 04.

We present tomographic evidence for the existence of deep-mantle thermal convection plumes. P-wave velocity images show at least six well-resolved plumes that extend into the lowermost mantle: Ascension, Azores, Canary, Easter, Samoa, and Tahiti. Other less well-resolved plumes, including...

Showing 1 to 12 of 304 entries