Poly-phase switched-capacitor IIR Hilbert transformers Kong-Pang Pun; Franca, J.E.; Leme, C.A.
ICECS'99. Proceedings of ICECS '99. 6th IEEE International Conference on Electronics, Circuits and Systems (Cat. No.99EX357),
1999, Volume:
3
Conference Proceeding
A novel poly-phase switched-capacitor (SC) circuit architecture for IIR Hilbert transformation is proposed for the application of wide-band 90/spl deg/ phase shifting. The circuit employs fewer ...active elements and has better performance than the traditional two-phase circuit. SWITCAP2 simulation results, phase sensitivities to capacitance mismatches and other non-ideal effects are discussed.
Thenar crush injuries Chow, S P; So, Y C; Pun, W K ...
Journal of bone and joint surgery. British volume
70, Issue:
1
Journal Article
Crushing of the radial side of the hand results in a wide spectrum of injuries varying from contusion of muscles to total loss. The main problem concerns the function of the thumb. The results of ...such injuries in 161 hands were reviewed. Those with mild injuries treated conservatively or by debridement alone had good results. When skin flaps were required for wound coverage, the results were still satisfactory. However, when bones and joints were injured, the results were poor. In certain patients opponensplasty through scarred tissue proved to be a good procedure to improve the function of the thumb.
Newly developed GaN technology offers great potential for military and space, as well as some high volume applications. The devices are grown on different substrates (sapphire, silicon and silicon ...carbide), involving differences on the performances, price, and technological complexity. The design of a fully integrated transceiver in such a technology necessitates great noise performances for the linear (low noise amplifiers, LNA) and non-linear (voltage controlled oscillator, VCO) applications. The low noise figure already published on this technology up to X-band, associated to the capability to handle high power levels avoid the integration of a limiter stage that deteriorates the overall noise figure in conventional architectures. The low frequency noise performances are useful both for the technology assessment (maturity's indicator) and for the non-linear circuit design (conversion to phase noise around the carrier). This paper presents the noise performances of AlGaN/GaN HEMT grown on SiC substrate. Low frequency noise contributors in the ohmic and saturated regime are discussed. Residual phase noise characterization at 10 GHz correlates the results about the noise sources involved, and linear high frequency noise figure measurements are also presented, targeting respectively VCO and LNA applications
Mon.Not.Roy.Astron.Soc.368:1507-1514,2006 We present measurements of the normalised redshift-space three-point
correlation function (Q_z) of galaxies from the Sloan Digital Sky Survey (SDSS)
main ...galaxy sample. We have applied our "npt" algorithm to both a
volume-limited (36738 galaxies) and magnitude-limited sample (134741 galaxies)
of SDSS galaxies, and find consistent results between the two samples, thus
confirming the weak luminosity dependence of Q_z recently seen by other
authors. We compare our results to other Q_z measurements in the literature and
find it to be consistent within the full jack-knife error estimates. However,
we find these errors are significantly increased by the presence of the ``Sloan
Great Wall'' (at z ~ 0.08) within these two SDSS datasets, which changes the
3-point correlation function (3PCF) by 70% on large scales (s>=10h^-1 Mpc). If
we exclude this supercluster, our observed Q_z is in better agreement with that
obtained from the 2dFGRS by other authors, thus demonstrating the sensitivity
of these higher-order correlation functions to large-scale structures in the
Universe. This analysis highlights that the SDSS datasets used here are not
``fair samples'' of the Universe for the estimation of higher-order clustering
statistics and larger volumes are required. We study the shape-dependence of
Q_z(s,q,theta) as one expects this measurement to depend on scale if the large
scale structure in the Universe has grown via gravitational instability from
Gaussian initial conditions. On small scales (s <= 6h^-1 Mpc), we see some
evidence for shape-dependence in Q_z, but at present our measurements are
consistent with a constant within the errors (Q_z ~ 0.75 +/- 0.05). On scales
>10h^-1 Mpc, we see considerable shape-dependence in Q_z.
Sixty-six subjects from 7 families with a strong family history of generalized osteoarthritis (OA) and 13 patients with erosive OA were evaluated clinically and radiologically. Blood samples from 58 ...subjects in the familial OA group and from all 13 patients with erosive OA were obtained for DNA analysis. Exon 31 of COL2A1, which spans residue 519, was amplified by polymerase chain reaction. The arg super(519)-to-cys mutation was detected in 2 of the 7 families with generalized OA. In these 2 families, the mutation was present in the 2 probands and in 19 other clinically affected family members, as well as in 3 (so-far) clinically unaffected family members (ages 25, 14, and 11 years). It was absent in 18 clinically unaffected members tested. The mutation was associated with a distinctive pattern of early-onset, aggressive, generalized OA with a mild spinal chondrodysplasia. Inheritance was autosomal dominant. No mutation was found in any of the patients with erosive OA.
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BFBNIB, FZAB, GIS, IJS, KILJ, NUK, OILJ, SBCE, SBMB, UL, UM, UPUK
A 53-yr-old Chinese sailor developed prolonged pyrexia with unresolved lobar pneumonia, cervical lymphadenopathy, generalized subcutaneous abscesses, and pericardial effusion. Penicillium marneffei ...was isolated from pericardial fluid and subcutaneous pus and was demonstrated on histologic sections of lymph nodes and lung tissue. The penicilliosis was treated successfully with amphotericin B, ketoconazole, and 5-fluorocytosine. Subsequently, he also developed other T-lymphocyte-related opportunistic infections such as disseminated cutaneous herpes zoster and chronic osteomyelitis of sternum caused by Salmonella typhimurium. He was also a chronic carrier of cytomegalovirus. Further investigations showed that he had persistent depression of T-lymphocyte function and enhancement of B-lymphocyte activity, the cause of which was undetermined.
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