The microstructures and mechanical properties of the Fe-10 mass%Al-(5-40)mass%Mn-1.0 mass%C alloys sheet castings have been investigated by using optical microscope (OM), transmission electron microscope (TEM), scanning electron microscope (SEM), experimental model analysis, tensile test and hardness test. Based on the present studies, the macroscopic microstructure of the present alloys are a mixture of austenite (γ ) and ferrite (α) duplex phases, and the α phase would decrease with the Mn content increased. In the meantime, according to the examination of TEM, the macroscopic γ phase is a mixture of the γ + fine(Fe, Mn) 3 AlC x (κ) + (Fe, Mn) 3 AlC x (κ ) phases and the macroscopic α phase is a mixture of the D0 3 + coarse(Fe, Mn) 3 AlC x (κ ) phases. The mechanical properties such as the ultimate tensile strength (UTS), yield strength (Y.S.), elongation of these alloys were in the range of 646-887 MPa, 575-824 MPa, and 16.3-29.2%, respectively. The hardness of these alloys were in the range of HR C 31-44. Moreover, the relationship between hardness and ultimate strength is UTS 20.93HR C . In addition, the damping ratios and Young's modulus of the present alloys were in the range of 0.0603-0.0417, and 139-165 GPa, respectively. It is noted here that the results have never observed by other research workers in the Fe-Al-Mn-C alloy system.

Introduction: The negative results in trials of vitamin C in Charcot–Marie–Tooth disease (CMT) type 1A have highlighted the lack of sensitive outcome measures. Neurofilaments are abundant neuronal cytoskeletal proteins, and their concentration in blood is likely to reflect axonal breakdown. We therefore examined plasma neurofilament heavy‐chain (NfH) concentration as a potential biomarker in CMT. Methods: Blood samples were collected from healthy controls and patients with CMT over a 2‐year period. Disease severity was measured using the CMT Examination Score. An in‐house enzyme‐linked immunoabsorbent assay was used to measure plasma NfH levels. Results: There was no significant difference in plasma NfH concentrations between CMT patients and controls (P = 0.449). There was also no significant difference in plasma NfH levels in the CMT group over 1 year (mean difference = –0.02, SEM = 4.44, P = 0.98). Conclusions: Plasma NfH levels are not altered in patients with CMT and are not a suitable biomarker of disease activity. Muscle Nerve 53: 972–975, 2016

PurposeThe purpose of this paper is to solve the pack loss problem of video transmitted over error‐prone channels. Pack loss generally affects the visual quality of reconstructed frames significantly. Consequently, a grey approach to error concealment (EC) is proposed.Design/methodology/approachNote that missing information in error blocks can be found before and after the error frame. Thus, two adjacent error‐free frames are utilized to conceal error blocks caused by packet loss. This paper presents an EC approach based on grey polynomial interpolation (GPI) which is called the GTEC. In the GTEC, the following stages are involved. First, error blocks due to packed loss are detected. Then, optimal reference blocks in adjacent frames are found through boundary matching algorithm (BMA). Finally, estimated blocks are obtained by the GPI. By replacing error blocks with the estimated blocks, EC is completed in the GTEC.FindingsIn the simulation, the proposed GTEC is compared with the EC scheme in H.264 and the BMA. With packet loss rates of 1, 3, 5, and 10 per cent, the proposed GTEC approach has better performance than EC schemes in H.264 and BMA, both in peak signal‐to‐noise ratio and visual quality. Consequently, it provides an alternative where EC is required.Originality/valueThe value of GTEC proposed in this paper is not only in better performance but also in the originality to apply grey scheme, i.e. GPI, in the field of EC.

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