995 research outputs found
Increasing the Size of a Piece of Popcorn
Popcorn is an extremely popular snack food in the world today. Thermodynamics
can be used to analyze how popcorn is produced. By treating the popping
mechanism of the corn as a thermodynamic expansion, a method of increasing the
volume or size of a kernel of popcorn can be studied. By lowering the pressure
surrounding the unpopped kernel, one can use a thermodynamic argument to show
that the expanded volume of the kernel when it pops must increase. In this
project, a variety of experiments are run to test the validity of this theory.
The results show that there is a significant increase in the average kernel
size when the pressure of the surroundings is reduced.Comment: Latex document, 14 pages, 4 figures, 1 page of table
A 28-nm CMOS 1 V 3.5 GS/s 6-bit DAC with signal-independent delta-I noise DfT scheme
This paper presents a 3.5GSps 6-bit current-steering DAC with auxiliary circuitry to assist testing in a 1V digital 28nm CMOS process. The DAC uses only thin-oxide transistors and occupies 0.035mm2, making it suitable to embedding in VLSI systems, e.g. FPGA. To cope with the IC process variability, a unit element approach is generally employed. The 3 MSBs are implemented as 7 unary D/A cells and the 3 LSBs as 3 binary D/A cells, using appropriately reduced number of unit elements. Furthermore, all digital gates only make use of two basic unit blocks: a buffer and a multiplexer. For testing, a memory block of 5kbits is placed on-chip, which is externally loaded in a serial way but internally read in an 8x time-interleaved way. The memory is organized around 48 clocked 104-bit shift-registers. It keeps the resulting switching disturbances signal-independent and hence avoids inducing output non-linearity errors, even when a common power supply is shared with the DAC. This novelty allows reliable testing of the DAC core, while avoiding performance limitation risks of handling high-speed off-chip data streams. The DAC SFDR>40dB bandwidth is 0.8GHz, while the IM
Fos co-operation with 14-3-3σ [Stratifin] induces malignant conversion in transgenic mouse skin carcinogenesis: a paradigm for SCC of follicular origin
No abstract available
Analysis of β-catenin expression in transgenic mouse skin carcinogenesis reveals inhibitory roles in papillomatogenesis and oncogenic roles in malignant conversion
No abstract available
Multibeam Maser Survey of methanol and excited OH in the Magellanic clouds: new detections and maser abundance estimates
‘The definitive version is available at www.blackwell-synergy.com.’ Copyright Blackwell Publishing DOI: 10.1111/j.1365-2966.2008.12888.xPeer reviewe
Nonresonant Contributions in B->rho pi Decay
We consider nonresonant contributions in the Dalitz plot analysis of B->rho
pi->pi^+ pi^- pi^0 decay and their potential impact on the extraction of the
CKM parameter alpha. In particular, we examine the role of the heavy mesons B^*
and B_0, via the process B->pi (B^*, B_0)->pi^+ pi^- pi^0, and their
interference with resonant contributions in the rho-mass region. We discuss the
inherent uncertainties and suggest that the effects may be substantially
smaller than previously indicated.Comment: 15 pages, 3 figures; minor changes, version to appear in Phys. Rev.
Automating the Calibration of a Neonatal Condition Monitoring System
Abstract. Condition monitoring of premature babies in intensive care can be carried out using a Factorial Switching Linear Dynamical System (FSLDS) [15]. A crucial part of training the FSLDS is the manual calibration stage, where an interval of normality must be identified for each baby that is monitored. In this paper we replace this manual step by using a classifier to predict whether an interval is normal or not. We show that the monitoring results obtained using automated calibration are almost as good as those using manual calibration
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