179,095 research outputs found
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
Full text linkThe 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
Amynthas mamillaris Chen 1938
No full textAmynthas mamillaris (Chen, 1938) Pheretima mamillaris Chen, 1938: 413, Fig. 15; Le 1995a: 33; Nakamura 1999: 35. Amynthas mamillaris— Sims & Easton 1972: 236, 244; Blakemore 2007a: 62. Type locality. China (Hainan Isl.). Type material. Unknown. Examined material. 8 C (SORC-V.149.01) near stream, Viet Lam, Vi Xuyen, Ha Giang, 5/12/1993, coll. Le Van Trien. Records from Vietnam. Ha Giang (Vi Xuyen) (Le 1995a). Distribution. China (Chen 1938). Vietnamese name. Giun núm vú.Published as part of Nguyen, Tung T., Nguyen, Anh D., Tran, Binh T. T. & Blakemore, Robert J., 2016, A comprehensive checklist of earthworm species and subspecies from Vietnam (Annelida: Clitellata: Oligochaeta: Almidae, Eudrilidae, Glossoscolecidae, Lumbricidae, Megascolecidae, Moniligastridae, Ocnerodrilidae, Octochaetidae), pp. 1-92 in Zootaxa 4140 (1) on page 38, DOI: 10.11646/zootaxa.4140.1.1, http://zenodo.org/record/25650
Amynthas zoysiae Chen 1933
No full textAmynthas zoysiae (Chen, 1933) Pheretima zoysiae Chen, 1933: 288; Le 1995a: 46; Nakamura 1999: 22; Thai 2000a: 310; Huynh et al. 2005: 180. Type locality. China (Chekiang: Lin-hai). Type material. ZMNU (No. 570). Records from Vietnam. Bac Giang (Luc Ngan); Phu Tho (Doan Hung; Xuan Son NP) (Le 1995a; Huynh et al. 2005). Distribution. China (Chen 1933). Remarks. The species was synonymized with Amynthas minimus (Horst, 1893) (Easton 1981; Blakemore 2002), but Shen and Yeo (2005) re-validated this species. A. zoysiae differs from A. minimus in lower setal number and larger prostate glands (Shen & Yeo 2005: 22).Published as part of Nguyen, Tung T., Nguyen, Anh D., Tran, Binh T. T. & Blakemore, Robert J., 2016, A comprehensive checklist of earthworm species and subspecies from Vietnam (Annelida: Clitellata: Oligochaeta: Almidae, Eudrilidae, Glossoscolecidae, Lumbricidae, Megascolecidae, Moniligastridae, Ocnerodrilidae, Octochaetidae), pp. 1-92 in Zootaxa 4140 (1) on page 49, DOI: 10.11646/zootaxa.4140.1.1, http://zenodo.org/record/25650
Malabaria levis Chen 1938
No full textMalabaria levis (Chen, 1938) Filodrilus levis Chen, 1938: 422, Fig. 19. Malabaria levis— Gates 1942: 92; Gates 1972: 265; Thai 1983: 121; Thai 2000a: 311; Thai 2000b: 1; Blakemore 2008. Type locality. China (Hainan Isl.). Type material. Unknown. Records from Vietnam. Hanoi (Tu Liem) (Thai 2000b). Distribution. Myanmar, China (Chen 1938; Gates 1972). Vietnamese name. Giun malabaria nhỏ.Published as part of Nguyen, Tung T., Nguyen, Anh D., Tran, Binh T. T. & Blakemore, Robert J., 2016, A comprehensive checklist of earthworm species and subspecies from Vietnam (Annelida: Clitellata: Oligochaeta: Almidae, Eudrilidae, Glossoscolecidae, Lumbricidae, Megascolecidae, Moniligastridae, Ocnerodrilidae, Octochaetidae), pp. 1-92 in Zootaxa 4140 (1) on page 80, DOI: 10.11646/zootaxa.4140.1.1, http://zenodo.org/record/25650
Amynthas pomosus Chen 1946
No full textAmynthas pomosus (Chen, 1946) Pheretima pomosa Chen, 1946: 139, Pl. IV, Fig. D. Pheretima domosa Chen, 1946: 102; Do 1994: 71; Nakamura 1999: 46; Huynh & Nguyen 2004a: 115; Blakemore 2007a: 30, " nomen nudum ". Amynthas domosus— Sims & Easton 1972: 234. Amynthas pomosus— Blakemore 2007a: 82, "emend". Type locality. China (Szechuan). Type material. Unknown. Records from Vietnam. Lao Cai (Sa Pa), Hanoi (Ba Vi NP) (Do 1994; Huynh & Nguyen 2004a). Distribution. China (Chen 1946). Remarks. Blakemore (2007a) restored name under ICZN (1999: Art. 32.5) from incorrect original spelling of the name as " domosa " by Chen (1946: 102) for " pomosa " as cited by Chen (1946: 139 and Plate IV D). Sims & Easton (1972: 234) and Reynolds & Cook (1976: 95) have erroneously retained the name " domosus ".Published as part of Nguyen, Tung T., Nguyen, Anh D., Tran, Binh T. T. & Blakemore, Robert J., 2016, A comprehensive checklist of earthworm species and subspecies from Vietnam (Annelida: Clitellata: Oligochaeta: Almidae, Eudrilidae, Glossoscolecidae, Lumbricidae, Megascolecidae, Moniligastridae, Ocnerodrilidae, Octochaetidae), pp. 1-92 in Zootaxa 4140 (1) on page 44, DOI: 10.11646/zootaxa.4140.1.1, http://zenodo.org/record/25650
A low-complexity ECG feature extraction algorithm for mobile healthcare applications
Full text linkThis paper introduces a low-complexity algorithm for the extraction of the fiducial points from the Electrocardiogram (ECG). The application area we consider is that of remote cardiovascular monitoring, where continuous sensing and processing takes place in low-power, computationally constrained devices, thus the power consumption and complexity of the processing algorithms should remain at a minimum level. Under this context, we choose to employ the Discrete Wavelet Transform (DWT) with the Haar function being the mother wavelet, as our principal analysis method. From the modulus-maxima analysis on the DWT coefficients, an approximation of the ECG fiducial points is extracted. These initial findings are complimented with a refinement stage, based on the time-domain morphological properties of the ECG, which alleviates the decreased temporal resolution of the DWT. The resulting algorithm is a hybrid scheme of time and frequency domain signal processing. Feature extraction results from 27 ECG signals from QTDB, were tested against manual annotations and used to compare our approach against the state-of-the art ECG delineators. In addition, 450 signals from the 15-lead PTBDB are used to evaluate the obtained performance against the CSE tolerance limits. Our findings indicate that all but one CSE limits are satisfied. This level of performance combined with a complexity analysis, where the upper bound of the proposed algorithm, in terms of arithmetic operations, is calculated as 2:423N + 214 additions and 1:093N + 12 multiplications for N 861 or 2:553N + 102 additions and 1:093N +10 multiplications for N > 861 (N being the number of input samples), reveals that the proposed method achieves an ideal trade-off between computational complexity and performance, a key requirement in remote CVD monitoring systems
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
Full text linkFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
DNA fusion gene vaccination mobilizes effective anti-leukemic cytotoxic T lymphocytes from a tolerized repertoire
No full textThe majority of known human tumor-associated antigens derive from non-mutated self proteins. T cell tolerance, essential to prevent autoimmunity, must therefore be cautiously circumvented to generate cytotoxic T cell responses against these targets. Our strategy uses DNA fusion vaccines to activate high levels of peptide-specific CTL. Key foreign sequences from tetanus toxin activate tolerance-breaking CD4+ T cell help. Candidate MHC class Ibinding tumor peptide sequences are fused to the C terminus for optimal processing and presentation. To model performance against a leukemia-associated antigen in a tolerized setting, we constructed a fusion vaccine encoding an immunodominant CTL epitopederived from Friend murine leukemia virus gag protein (FMuLVgag) and vaccinated tolerant FMuLVgag-transgenic (gag-Tg) mice. Vaccination with the construct induced epitopespecificIFN-c-producing CD8+ T cells in normal and gag-Tg mice. The frequency and avidity of activated cells were reduced in gag-Tg mice, and no autoimmune injury resulted. However, these CD8+ T cells did exhibit gag-specific cytotoxicity in vitro and in vivo. Also, epitope-specific CTL killed FBL-3 leukemia cells expressing endogenous FMuLVgag antigen and protected against leukemia challenge in vivo. These results demonstrate a simple strategy to engage anti-microbial T cell help to activate epitope-specific polyclonal CD8+ T cell responses from a residual tolerized repertoire
Metaphire leonoris Chen 1946
No full textMetaphire leonoris (Chen, 1946) Pheretima leonoris Chen, 1946: 114, Plate VII, Fig. A; Do 1994: 89; Nakamura 1999: 31; Thai 2000a: 309; Huynh & Nguyen 2004a: 115. Metaphire leonoris— Sims & Easton 1972: 238; Blakemore 2007a: 58. Type locality. Szechuan (China). Type material. Unknown. Records from Vietnam. Lao Cai (Sa Pa); Hanoi (Ba Vi NP) (Do 1994; Huynh & Nguyen 2004a). Distribution. China (Szechuan) (Chen 1946). Remarks. Chen (1946) recorded two coloration types of the species: white specimens living in the yellow clays and dark specimens living in humus soils. The species was only known from highly mountainous areas (1,800m a.s.l. in Szechuan and 2,000m a.s.l. in Sa Pa). Do (1994) assumed that it could be an endemic species for mountainous areas in Indochina and Southern China. No material was examined because of lack of available specimens.Published as part of Nguyen, Tung T., Nguyen, Anh D., Tran, Binh T. T. & Blakemore, Robert J., 2016, A comprehensive checklist of earthworm species and subspecies from Vietnam (Annelida: Clitellata: Oligochaeta: Almidae, Eudrilidae, Glossoscolecidae, Lumbricidae, Megascolecidae, Moniligastridae, Ocnerodrilidae, Octochaetidae), pp. 1-92 in Zootaxa 4140 (1) on page 61, DOI: 10.11646/zootaxa.4140.1.1, http://zenodo.org/record/25650
Amynthas asacceus Chen 1938
No full textAmynthas asacceus (Chen, 1938) Pheretima assaccea Chen, 1938: 382; Do 1994: 59; Le 1995a: 47; Thai 2000a: 308. Amynthas assacceus— Sims & Easton 1972: 236. Amynthas asacceus— Tsai et al. 2001: 284; Blakemore 2007a: 9; Blakemore 2008b. Pheretima pusilla Ohfuchi, 1956: 138 (non Ude, 1893 = A. minimus), synonymized by Tsai et al. (2000, 2001). Pheretima medipusilla Nakamura, 1999: 2, nom. nov., pro Pheretima pusilla Ohfuchi, 1956. Type locality. China (Hainan). Type material. Unknown. Records from Vietnam. Yen Bai (Luc Yen; Bao Ha); Ninh Binh (Cuc Phuong NP) (Do 1994; Le 1995a; Thai 1982). Distribution. China, Japan (Chen 1938; Nakamura 1999). Remarks. An "incorrect original spelling" (under ICZN, 1999: Art. 32.5.1.1) as Pheretima assaccea was subsequently corrected by Chen in an ERRATA sheet to asaccea (Tsai et al. 2001). Thus, it is often misspelt as " Amynthas assacceus ". No re-examination was made because of lack of available specimens. Do (1994) stated that the population found in northwestern Vietnam has additional genital markings on spermathecal region.Published as part of Nguyen, Tung T., Nguyen, Anh D., Tran, Binh T. T. & Blakemore, Robert J., 2016, A comprehensive checklist of earthworm species and subspecies from Vietnam (Annelida: Clitellata: Oligochaeta: Almidae, Eudrilidae, Glossoscolecidae, Lumbricidae, Megascolecidae, Moniligastridae, Ocnerodrilidae, Octochaetidae), pp. 1-92 in Zootaxa 4140 (1) on page 15, DOI: 10.11646/zootaxa.4140.1.1, http://zenodo.org/record/25650
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