| 1. |
- Ablikim, M., et al.
(författare)
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Measurements of (XcJ)-> K+K-K+K- decays
- 2006
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Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 642:3, s. 197-202
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Tidskriftsartikel (refereegranskat)abstract
- Using 14M psi(2S) events taken with the BESII detector, chi(cJ) -> 2(K+K-) decays are studied. For the four-kaon final state, the branching fractions are B(chi(c0,1,2) ->.2(K+K-)) = (3.48 +/- 0.23 +/- 0.47) x 10(-3), (0.70 +/- 0.13 +/- 0.10) x 10(-3), and (2.17 +/- 0.20 +/- 0.31) x 10(-3). For the phi K+K- final state, the branching fractions, which are measured for the first time, are B(chi(c0,1,2) -> phi K+K-) = (1.03 +/- 0.22 +/- 0.15) x 10(-3), (0.46 +/- 0.16 +/- 0.06) x 10(-3), and (1.67 +/- 0.26 +/- 0.24) x 10(-4). For the phi phi final state, B(chi(c0,2) -> phi phi) = (0.94 +/- 0.21 +/- 0.13) x 10(-3) and (1.70 +/- 0.30 +/- 0.25) x 10(-3).
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| 2. |
- Lu, Xiang, et al.
(författare)
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Analysis of connection availability in optical networks with multi-failure assumption
- 2006
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Ingår i: Proc SPIE Int Soc Opt Eng. - : SPIE. - 0819462497 - 9780819462497
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Konferensbidrag (refereegranskat)abstract
- Optical networks carry an increasing amount of traffic due to the rapid growth of IP and multimedia services. Therefore the impact of network failures on this traffic and thus user services is growing fast. In addition some network services are heavily dependent upon the availability of communication resources. Consequently, network operators have to deal with the steadily growing availability requirement. Thus, survivability mechanisms need to be provided in the networks to meet the connection availability requirement. There are several protection schemes that can be applied to improve connection availability in the network. Shared Path Protection (SPP) scheme is selected in this paper due to its efficiency in resource utilization .In many works the SPP scheme has been studied to solve a single failure problem. However, in large networks the occurrence of multiple concurrent failures cannot be neglected [1]-[3]. In this respect we studied the SPP scheme for mesh optical transport networks with multiple failure scenario and developed connection availability model with multiple failure assumption instead of traditional single failure assumption. In this paper we present the analytical model for connection availability in SPP mesh network with multiple failure assumption. Our model is more general than the traditional model adopted for single failure assumption and also is more general than the work for two protection paths. We also developed a simulator to evaluate our analytical model. The results show that the connection unavailability obtained by simulations is very close to the theoretical value, which approve that our algorithm is accurate.
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| 3. |
- Wang, C, et al.
(författare)
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"Transparent MgAl2O4 ceramic produced by spark plasma sintering"
- 2009
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Ingår i: SCRIPTA MATERIALIA. - : Elsevier BV. - 1359-6462 .- 1872-8456. ; 61:2, s. 193-196
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Tidskriftsartikel (refereegranskat)abstract
- A two-step pressure profile was used to prepare transparent MgAl2O4 ceramic without sintering aids by spark plasma sintering (SPS) at 1300 degrees C for 3 min. The influence of the pressure profile was investigated systematically and the discoloration in the present study was attributed to the dislocation formed during he fast densification in SPS. At low pre-load pressure, 5 MPa, with the normal characteristic fast heating rate (100 degrees C min(-1)), high inline transmittance of 51% at 550 nm and 85% at 2000 nm can be achieved. Keywords: Sintering; Oxide; Optical transmission; Dislocation; Ultrafine-grained microstructure
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| 4. |
- Wang, Shan-Shan, et al.
(författare)
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Modeling endface output patterns of optical micro/nanofibers
- 2008
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Ingår i: Optics Express. - 1094-4087. ; 16:12, s. 8887-8895
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Tidskriftsartikel (refereegranskat)abstract
- Endface output patterns of micro/nanofibers (MNFs) are simulated using a Three-Dimension Finite-Difference Time-Domain (3D-FDTD) method. The intensity distribution and beam widths of near-or far-field output patterns of freestanding silica and tellurite MNFs with flat, angled, spherical and tapered endfaces in air and/or water are obtained. It shows that, for a subwavelength-diameter MNF, highly confined output beam can be obtained in the near field, and the beam width can be tuned by the ratio of fiber diameter and light wavelength with a minimum width smaller than the wavelength. Meanwhile, MNFs with shaped endfaces behave differently from standard fibers in reflection, redirection and focus of light beam at the endfaces. These results may offer valuable references for practical evaluation and application of terminated MNFs with wavelength-or subwavelength-scale endfaces.
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| 5. |
- Wikstrand, Greger, et al.
(författare)
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Dynamic Regression Test Selection Based on a File Cache : An Industrial Evaluation
- 2009
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Konferensbidrag (refereegranskat)abstract
- This paper presents a simple method that computes test case coverage information from information on what files were updated to fix a fault found by the test case. It uses a cache to monitor fault-prone files and recommends test cases to rerun to cover updated files. We present an evaluation of the method during two months of development of a large, industrial, embedded, real-time software system. Our results show that the method is effective, reaching weekly cache hit rates in the range 50-80%.
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| 6. |
- Xu, Min, et al.
(författare)
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Ototoxicity on cochlear nucleus neurons following systemic application of gentamicin
- 2009
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Ingår i: Acta Oto-Laryngologica. - : Informa UK Limited. - 1651-2251 .- 0001-6489. ; 129:7, s. 745-748
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Tidskriftsartikel (refereegranskat)abstract
- Conclusion. The gentamicin-induced pathological alteration in the cochlear nucleus is not exclusively a secondary consequence of the damage in the cochlea. Instead, the toxic effect of gentamicin on the cochlear nucleus may occur simultaneously or even earlier than that on the cochlea. Objectives. To investigate the pathological alteration of cochlear nucleus neurons in guinea pigs following systemic application of gentamicin. Materials and methods. Guinea pigs were injected with gentamicin for I day, 3 days, I week, 2 weeks, and 3 weeks, respectively. In gentamicin-treated animals, the hearing function was evaluated by measuring the auditory brainstem response (ABR). The number and cross-sectional area of substance P-positive neurons in the cochlear nucleus were also measured. Results. The threshold of ABR and the number of substance P-positive neurons in the cochlear nucleus were significantly increased after I week and 3 days of injection of gentamicin, respectively. The cross-sectional area of substance P-positive neurons in the cochlear nucleus was significantly reduced after 1-day injection of gentamicin.
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| 7. |
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| 8. |
- Zhe, XW, et al.
(författare)
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Pulse wave velocity is associated with metabolic syndrome components in CAPD patients
- 2008
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Ingår i: American journal of nephrology. - : S. Karger AG. - 1421-9670 .- 0250-8095. ; 28:4, s. 641-646
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Tidskriftsartikel (refereegranskat)abstract
- <i>Background:</i> Overall, the proportion of deaths due to cardiovascular disease (CVD) reached 40–50% in dialysis patients. Pulse wave velocity (PWV) reflects arterial stiffness and may provide an integrated index of vascular status and CVD risk. Individual components of the metabolic syndrome (MetS) are well-established cardiovascular risk factors. Thus we conducted a cross-sectional study in continuous ambulatory peritoneal dialysis (CAPD) patients to explore the association of MetS components with PWV. <i>Methods:</i> Prevalent CAPD patients (n = 148, 63 M/85 F) were categorized according to the number of traits of the MetS into one of three groups (No MetS, Risk of MetS, MetS). Due to the effect of peritoneal dialysis (PD), waist circumference was not assessed. Aortic stiffness was assessed by carotid-femoral PWV (C-F PWV). <i>Results:</i> Patients’ MetS trait numbers were positively associated with C-F PWV (r = 0.301, p < 0.01), pulse pressure (r = 0.256, p < 0.01), systolic blood pressure (r = 0.233, p < 0.01), and serum albumin (r = 0.205, p < 0.05). In a multivariate regression analysis, PWV was independently determined by age (p < 0.01) and MetS score (p = 0.01). Adjusted R<sup>2</sup> of the model was 0.24. <i>Conclusion:</i> MetS traits were closely associated with an increased C-F PWV, even after adjustment for confounders. This suggests that commonly recognized MetS criteria are useful also when predicting CVD in CAPD patients.
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