Reliability, Availability, and Maintainability of Intermittently-usedRepairable Systems

A composite measure comprising linear combination of reliability, availability, andmaintainability (CMRAM) is proposed for an intermittently-used complex repairable system,namely a transport helicopter. The failure data are fitted in Weibull distribution for overlappingintervals of operating time to capture the effect of recent maintenance and other actions. Evaluationof CMRAM is helpful in formulating future operational and maintenance strategies

Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb⁻¹ of pp collisions at \sqrts = 13 TeV with the ATLAS experiment

A search for flavour-changing neutral current (FCNC) events via the coupling of a top quark, a photon, and an up or charm quark is presented using 81 fb−1 of proton–proton collision data taken at a centre-of-mass energy of 13 TeV with the ATLAS detector at the LHC. Events with a photon, an electron or muon, a b-tagged jet, and missing transverse momentum are selected. A neural network based on kinematic variables differentiates between events from signal and background processes. The data are consistent with the background-only hypothesis, and limits are set on the strength of the tqγ coupling in an effective field theory. These are also interpreted as 95% CL upper limits on the cross section for FCNC tγ production via a left-handed (right-handed) tuγ coupling of 36 fb (78 fb) and on the branching ratio for t→γu of 2.8×10−5 (6.1×10−5). In addition, they are interpreted as 95% CL upper limits on the cross section for FCNC tγ production via a left-handed (right-handed) tcγ coupling of 40 fb (33 fb) and on the branching ratio for t→γc of 22×10−5 (18×10−5). © 2019 The Author(s

Optimization of grinding process parameters using enumeration method

The selection of grinding parameters if done on hit and miss method not only wastes time but also leads to an inefficient process. The parameters should be so selected so as to result in an optimal solution. In this paper the “enumeration” method is discussed. By using this approach the user can select input parameters to achieve an optimal cutting condition

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Not AvailableThis study was conducted on sandy loam soil in semi arid region of Punjab at PAU Regional Research Station, Bathinda. Four different American cotton Bt hybrids (RCH134 BG I, MRC 6304 BG I, MRC 7017 BG II, MRC 7031 BG II) and one American variety (LH 2076) were compared to study the effect of sodic water (Residual sodium carbonate 6.4 meq/l and electrical conductivity 2200 µmhos/cm) on growth and seed cotton yield as compared to good quality canal water irrigation. The results revealed that various yield attributing characters varied significantly with quality of irrigation water among various cultivars of upland cotton tested in the experiment. Among different cultivars MRC 7017 showed excellent performance even under sodic water. The reduction in seed cotton yield in sodic water irrigation as compared to canal water was the lowest in MRC 7017 (4.6%), followed by MRC 7031 (8.5%), MRC 6304 (10.5%), RCH 134 (10.6%) and LH 2076 (18.5%). Similar trend was observed in yield attributing characters also.Not Availabl

Patterns of diversity in fatty-acid composition in the Australian groundnut germplasm collection

Knowledge of the amounts and types of fatty acids in groundnut oil is beneficial, particularly from a nutritional standpoint. Germplasm evaluation data for fatty acid composition on 819 accessions of groundnut (Arachis hypogaea L.) from the Australian Tropical Field Crops Genetic Resource Centre, Biloela, Queensland were examined. Data for eight quantitative fatty acid descriptors have been documented. Statistical assessment, via methods of pattern analysis, summarised and described the patterns of variation in fatty acid composition of the groundnut accessions in the Australian germplasm collection. Presentation of the results from principal components analysis and hierarchical cluster analysis using a biplot was shown to be a very useful interpretative tool. Such a biplot enables a simultaneous examination of the relationships among all the accessions and the fatty acids. Unlike that information available via database searches, the results from contribution analysis together with the biplot provide a global picture of the diversity available for use in plant breeding programs. The use of standardised data for eight fatty acids, compared to using three specific fatty acids, provided a better description of the total diversity available because it remains relevant with possible changes in the nutritional preferences for fatty acids. Fatty acid composition was found to vary in relation to the branching pattern of the accessions. This pattern is generally indicative of the botanical types of groundnuts; Virginia (alternate) compared to Spanish and Valencia (sequential) botanical types