120,311 research outputs found
Validity of the Novel Taiwan Lymphoscintigraphy Staging and Correlation of Cheng Lymphedema Grading for Unilateral Extremity Lymphedema
No full textOBJECTIVE: The aim was to validate the new Taiwan Lymphoscintigraphy Staging, correlate it with Cheng Lymphedema Grading (CLG) and evaluate the treatment outcomes of unilateral extremity lymphedema. BACKGROUND: No consensus has been reached for diagnosis and staging for patients with lymphedema among medical specialties. METHODS: We included 285 patients with unilateral extremity lymphedema using lymphoscintigraphy. Lymphoscintigraphy was correlated to clinical symptoms and signs, and classified into normal lymphatic drainage, partial obstruction, and total obstruction. Inter- and intraobserver reliability of Taiwan Lymphoscintigraphy Staging, correlation between Taiwan Lymphoscintigraphy Staging and clinical findings were conducted. Patients were categorized in "surgical" (n = 154) or "nonsurgical" (n = 131) groups for outcome evaluation. RESULTS: Lymphoscintigraphy found 11 patients (3.9%) with normal lymphatic drainage, 128 (44.9%) with partial obstruction, and 146 (51.2%) with total obstruction. Taiwan Lymphoscintigraphy Staging showed high interobserver agreement [intraclass correlation coefficient: 0.89 (95% confidence interval, 0.82-0.94)], and significantly correlated to computed tomography volumetric difference (r = 0.66, P < 0.001) and CLG [intraclass correlation coefficient: 0.79 (95% confidence interval 0.72-0.84)]. At a mean follow-up of 31.2 ± 2.9 months, significant improvement in the circumferential difference (from 23.9% ± 17.6% to 14.6% ± 11.1%; P = 0.03) with a mean circumferential reduction rate of 40.4% ± 4.5% was found in surgical group. At a mean follow-up of 26.6 ± 8.7 months, the nonsurgical group had increase of mean circumferential difference from 24.0% ± 17.2% to 25.3% ± 19.0% (P = 0.09), with a mean circumferential reduction rate was -1.9% ± 13.0%. CONCLUSIONS: The Taiwan Lymphoscintigraphy Staging is a reliable diagnostic tool, correlated with clinical findings and CLG, aiding in the selection of the appropriate treatment to achieve favorable long-term outcomes in unilateral extremity lymphedema
Fagus chienii W. C. Cheng 1935
No full text<p> <i>Fagus chienii</i> W.C.Cheng (1935: 70).</p> <p> Type:— CHINA. Sichuan [Szechuan]: W. Pingwu Xian [Pingwu hsien], elev. ca. 1300 m, 17 August 1931, <i>W. C. Cheng 2903</i> (lectotype designated here, NAS00070338; isolectotypes A00033870, CQNM0017387, E00098603, IBSC0001170, K000832761, MICH1109337, NAS00070339, NY00248568, PE00022177, PE00022178, PE00022179, PE00022180, PE00022181, PE00022182, PE00022180, SYS00054972, US 00409518).</p> <p> <b>Note</b>:—In the protologue, Cheng indicated <i>W.C. Cheng 2903</i> as the type, but he did not specify the herbarium where the type is deposited. In searching in various herbaria, 18 duplicates were traced and all of them are syntypes since no holotype was designated under Art. 9.6 (Turland <i>et al</i>. 2018). Most duplicates bear cupules and the identification annotation of W. C. Cheng and are well preserved. NAS00070338 is designated here as the lectotype for the reason Cheng used to work in NAS. In the protologue, Cheng (1935) stated the locality of the type at a place near “Yao-erpa” in West of Pingwu Xian; however, none of the duplicates with a label bearing this locality, and it is also uncertain whether “Pingwuhsien” means the present Pingwu Town. For efforts to trace this type locality has not been successful, the identity of this tree species is still uncertain (e.g. Huang <i>et al</i>. 1999).</p>Published as part of <i>Chen, Feng & He, Hai, 2022, The historical relics in Chongqing Natural History Museum: An annotated checklist of original materials for 37 names of Chinese seed plants, pp. 38-52 in Phytotaxa 530 (1)</i> on page 40, DOI: 10.11646/phytotaxa.530.1.3, <a href="http://zenodo.org/record/5823939">http://zenodo.org/record/5823939</a>
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
No full textThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
An algebraic approach to time scale analysis of singularly perturbed linear systems
No full textBibliography: p. 41.Supported by the Air Force Office of Scientific Research under grant AFOSR-82-0258 Supported by the Army Research Offcie under grant DAAG-29-84-K-005Xi-Cheng Lou, Alan S. Willsky, George C. Verghese
The Oxidation of N,N'-Disubstituted O-Phenylenediamine in Presence of Metal Ions and the Crystal Structure of N,N'-Dimethylbenzimidazolium Perchlorate, Pyridinebis(O-Benzo-Semi-Quinonediimine)Cobalt(III) Chloride and Bis(Phridine)-(N,N'-Bis
No full textOptimally robust redundancy relations for failure detection in uncertain systems
No full textBibliography: p. 24-25."March 1985.""Office of Naval Research ... Grant N00014-77-C-0224" "NASA Ames and NASA Langley Research Centers ... Grant NGL-22-009-124" "Air Force Office of Scientific Research ... Grant AFOSR-82-0258"Xi-Cheng Lou, Alan S. Willsky, George C. Verghese
Proceedings of the International Conference on occupational and environmental exposures of skin to chemicals. Science and Policy – Session II: health effects and Hazard Identification
No full textAcoustic Logging Guided Waves In Transversely Isotropic Formations
No full textWe have studied the velocity dispersion of guided waves in transversely isotropic formations. Theoretical velocity dispersion curves were calculated with elastic constants
based on laboratory and field measurements and compared to dispersion curves for
isotropic formations having the same vertical po and S-wave velocities. The symmetry
axis for the transverse isotropy was parallel to the borehole. The differences between
the phase velocities for the transversely isotropic and isotropic formations depend on
the type of wave, its frequency, and the amount of anisotropy, and can be as high as
7 to 10 percent.
The changes in the phase velocity due to changes in the elastic constants of the
formation (c[subscript 11], C[subscript 1]3, C[subscript 33], C[subscript 44], and C[subscript 66]) and the bulk modulus of the borehole fluid (⋋) vary with frequency. In a hard formation, the tube wave's velocity is sensitive to C[subscript 66] at low frequencies, to C[subscript 44] at high frequencies, and to ⋋ at all frequencies. The pseudo-Rayleigh wave is affected by C[subscript 44] near its cutoff frequency and by ⋋ at high frequencies. The flexural wave, which is generated by a shear wave logging tool, is similarly affected by C[subscript 44] at low frequencies and by ⋋ at high frequencies. As the formation becomes soft, the effect of the elastic constants upon the phase velocity gradually changes. Like a hard formation, the tube wave's velocities in a moderately soft formation are primarily affected by C[subscript 66] and ⋋ at low frequencies, but the influence of C[subscript 44] is much greater at high frequencies.
Since array processing methods can accurately estimate the velocity dispersion of
the guided waves over a wide range of frequencies, some elastic constants can be estimated. In a hard formation, the refracted P- and S-wave velocities uniquely determine
C[subscript 33] and C[subscript 44], and an inversion can be used to estimate C[subscript 66] and ⋋. In a moderately soft formation, the refracted P-wave velocity determines C[subscript 33], the flexural wave from the shear wave logging tool determines C[subscript 44], and the tube wave's velocity dispersion can be
used to estimate C[subscript 66] and ⋋.Massachusetts Institute of Technology. Earth Resources Laboratory (Founding Members Fellowship)Massachusetts Institute of Technology. Full Waveform Acoustic Logging Consortiu
Full Waveform Inversion of P Waves for V[subscript s] and Q[subscript p]
No full textWe present an indirect method of determining shear wave velocities from full waveform
acoustic logs based on the inversion of the spectral ratio of the P-wave trains at two
source-receiver separations. This method simultaneously inverts for the formation shear
wave velocity and compressional wave attenuation. The P-wave response is calculated
by means of branch-cut integration. This method is useful in "soft" formations where
the shear wave velocity is lower than the acoustic velocity of the borehole fluid and
thus there are no refracted shear wave or pseudo-Rayleigh wave arrivals. The method
is shown to give good estimates of formation shear wave velocity in both synthetic and
field data. The inversion algorithm is sensitive to local minima; care must be taken to
avoid them.Massachusetts Institute of Technology. Full Waveform Acoustic Logging ConsortiumNational Science Foundation (U.S.) (Grant OCE84-08761
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