Browsing by Title
Now showing items 143073-143092 of 143390
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X-ray structure of an AdoMet radical activase reveals an anaerobic solution for formylglycine posttranslational modification
(National Academy of Sciences (U.S.), 2013-05)Arylsulfatases require a maturating enzyme to perform a co- or posttranslational modification to form a catalytically essential formylglycine (FGly) residue. In organisms that live aerobically, molecular oxygen is used ... -
X-ray studies of strained overlayers
(Massachusetts Institute of Technology, 1989) -
X-ray studies of supernova remnants
(Massachusetts Institute of Technology, 1994) -
X-ray telescope foil optics : assembly, metrology, and constraint
(Massachusetts Institute of Technology, 2003) -
X-ray timing of the accreting millisecond pulsar SAX J1808.4-3658
(Massachusetts Institute of Technology, 2007)We present a 7 yr timing study of the 2.5 ms X-ray pulsar SAX J1808.4-3658, an X-ray transient with a recurrence time of =2 yr, using data from the Rossi X-ray Timing Explorer covering 4 transient outbursts (1998-2005). ... -
X-Ray Variability in the Young Massive Triple θ2 Orionis A
(IOP Publishing, 2006-08)Massive stars rarely show intrinsic X-ray variability. One exception is θ[superscript 2] Ori A, which has shown strong variability over the last 5 years. We observed a large outburst of the X-ray source with the High Energy ... -
AN X-RAY VIEW OF THE JET CYCLE IN THE RADIO-LOUD AGN 3C120
(IOP Publishing, 2013-07)We present a study of the central engine in the broad-line radio galaxy 3C120 using a multi-epoch analysis of a deep XMM-Newton observation and two deep Suzaku pointings (in 2012). In order to place our spectral data into ... -
X-ray-imaging spectrometer (XRIS) for studies of residual kinetic energy and low-mode asymmetries in inertial confinement fusion implosions at OMEGA (invited)
(AIP Publishing, 2022-11-01)<jats:p> A system of x-ray imaging spectrometer (XRIS) has been implemented at the OMEGA Laser Facility and is capable of spatially and spectrally resolving x-ray self-emission from 5 to 40 keV. The system consists of three ... -
X-RAYING THE INTERGALACTIC O VI ABSORBERS
(American Astronomical Society, 2009-05)The observed intergalactic O vi absorbers at z > 0 have been regarded as a significant reservoir of the “missing baryons.” However, to fully understand how these absorbers contribute to the baryon inventory, it is crucial ... -
X-Vision: An Augmented Vision Tool with Real-Time Sensing Ability in Tagged Environments
(Institute of Electrical and Electronics Engineers (IEEE), 2018-12)We present the concept of X-Vision, an enhanced Augmented Reality (AR)-based visualization tool, with the realtime sensing capability in a tagged environment. We envision that this type of a tool will enhance the ... -
X-Y Table User's Manual
(MIT Artificial Intelligence Laboratory, 1974-05)This working paper describes the mini-robot group's X-Y table and associated hardware. -
An x86 protected mode virtual machine monitor for the MIT exokernel
(Massachusetts Institute of Technology, 1999) -
XAUV : modular high maneuverability autonomous underwater vehicle
(Massachusetts Institute of Technology, 2009)The design and construction of a modular test bed autonomous underwater vehicle (AUV) is analyzed. Although a relatively common stacked-hull design is used, the state of the art is advanced through an aggressive power ... -
XBP-1 regulates signal transduction, transcription factors and bone marrow colonization in B cells
(Nature Publishing Group, 2009-04)XBP-1, a transcription factor that drives the unfolded protein response (UPR), is activated in B cells when they differentiate to plasma cells. Here, we show that in the B cells, whose capacity to secrete IgM has been ... -
XBP1s activation can globally remodel N-glycan structure distribution patterns
(Proceedings of the National Academy of Sciences, 2018-10)Classically, the unfolded protein response (UPR) safeguards secretory pathway proteostasis. The most ancient arm of the UPR, the IRE1-activated spliced X-box binding protein 1 (XBP1s)-mediated response, has roles in secretory ... -
XBP1s Links the Unfolded Protein Response to the Molecular Architecture of Mature N-Glycans
(Elsevier, 2015-10)The molecular architecture of the mature N-glycome is dynamic, with consequences for both normal and pathologic processes. Elucidating cellular mechanisms that modulate the N-linked glycome is, therefore, crucial. The ... -
XCast : a personal and groupwise broadcasting system for social event networking
(Massachusetts Institute of Technology, 2008)This thesis describes the design and development of a system that is aimed for personalized and group-wise broadcasts to collaboratively distribute information and to coordinate locally created events in infrastructure-free ... -
XCone: N-jettiness as an exclusive cone jet algorithm
(Springer Berlin Heidelberg, 2015-11)We introduce a new jet algorithm called XCone, for eXclusive Cone, which is based on minimizing the event shape N -jettiness. Because N -jettiness partitions every event into N jet regions and a beam region, XCone is an ... -
XCreation: A Graph-based Crossmodal Generative Creativity Support Tool
(ACM|The 36th Annual ACM Symposium on User Interface Software and Technology, 2023-10-29) -
Xenoliths and the nature of the upper mantle and lower crust Nunivak Island, Alaska.
(Massachusetts Institute of Technology, 1974)
