The Experts below are selected from a list of 15762 Experts worldwide ranked by ideXlab platform

M. Elforjani - One of the best experts on this subject based on the ideXlab platform.

  • Detecting AE Signals from Natural Degradation of Slow Speed Rolling Element Bearings
    Condition Monitoring of Machinery in Non-Stationary Operations, 2012
    Co-Authors: M. Elforjani, David
    Abstract:

    Rolling element bearing diagnosis using high frequency Acoustic Emission (AE) signals has been on-going since the late 1960’s. This paper attempts to demonstrate the use of AE measurements to detect Natural Defect initiation and propagation in a rolling element bearing. To facilitate the investigation a special purpose test-rig was built to allow for accelerated Natural degradation of a bearing race. It is concluded that sub-surface initiation and crack propagation is detectable with AE technology.

  • accelerated Natural fault diagnosis in slow speed bearings with acoustic emission
    Engineering Fracture Mechanics, 2010
    Co-Authors: M. Elforjani
    Abstract:

    Abstract Rolling element bearings are the most common cause of rotating machinery failure. Over the past 20 years, Acoustic Emission (AE) technology has evolved as a significant opportunity to monitor and diagnose the mechanical integrity of rolling element bearings. This paper presents results of an investigation to assess the potential of the Acoustic Emission (AE) technology for detecting and locating Natural Defects in rolling element bearings. To undertake this task a special purpose test-rig was built that allowed for accelerated Natural degradation of a bearing race. It is concluded that sub-surface initiation and subsequent crack propagation can be detected using a range of data analysis techniques on AE’s generated from Natural degrading bearings. The paper also investigates the source characterisation of AE signals associated with a Defective bearing whilst in operation. This study also attempted to identify the size of a Natural Defect on bearings using AE technology. In conclusion, the results from this investigation show that whilst measurements on operational bearings cannot be achieved as described in this paper, the method of identifying the onset of crack propagation can be employed as a quality control tool for bearing manufacturers particularly for testing bearing material homogeneity.

  • Natural mechanical degradation measurements in slow speed bearings
    Engineering Failure Analysis, 2009
    Co-Authors: M. Elforjani
    Abstract:

    Abstract Acoustic emission (AE) technology applied to condition monitoring is gaining acceptance as a useful complimentary tool. This paper demonstrates the use of AE measurements to detect, monitor the growth and locate Natural Defect initiation and propagation in a conventional rolling element bearing. To undertake this task a special purpose test-rig was built to allow for accelerated Natural degradation of a bearing race. It is concluded that crack initiation and its subsequent propagation is detectable with AE technology. The paper also investigates the source characterisation of AE signals associated with a Defective bearing whilst in operation.

  • Assessment of Natural crack initiation and its propagation in slow speed bearings
    Nondestructive Testing and Evaluation, 2009
    Co-Authors: M. Elforjani
    Abstract:

    Monitoring of bearings is an essential part of most condition monitoring programmes in rotating machinery. This paper demonstrates the use of acoustic emission (AE) measurements to detect, monitor and locate Natural Defect initiation and propagation in a thrust rolling element bearing. To undertake this task a special purpose test-rig was built that allowed for accelerated Natural degradation of a bearing race. It is concluded that sub-surface initiation and subsequent crack propagation can be detected using a range of time and frequency domain analysis techniques on AE's generated from Natural degrading bearings. The paper also investigates the source characterisation of AE signals associated with a Defective bearing whilst in operation.

  • monitoring the onset and propagation of Natural degradation process in a slow speed rolling element bearing with acoustic emission
    Journal of Vibration and Acoustics, 2008
    Co-Authors: M. Elforjani
    Abstract:

    The monitoring and diagnosis of rolling element bearings with the high frequency acoustic emission (AE) technology has been ongoing since the late 1960s. This paper demonstrates the use of AE measurements to detect, locate, and monitor Natural Defect initiation and propagation in a conventional rolling element bearing. To facilitate the investigation a special purpose test rig was built to allow for accelerated Natural degradation of a bearing race. It is concluded that subsurface initiation and subsequent crack propagation can be detected with the AE technology. The paper also presents comparative results between AE and vibration diagnosis.

Mengji Cao - One of the best experts on this subject based on the ideXlab platform.

  • Natural Defect of a plant rhabdovirus glycoprotein gene a case study of virus plant coevolution
    Phytopathology, 2020
    Co-Authors: Song Zhang, Aijun Huang, Xin Zhou, Ralf G Dietzgen, Changyong Zhou, Mengji Cao
    Abstract:

    Seven isolates of a putative cytorhabdovirus (family Rhabdoviridae, order Mononegavirales) designated as citrus-associated rhabdovirus (CiaRV) were identified in citrus, passion fruit, and paper bush from the same geographical area in China. CiaRV, bean-associated cytorhabdovirus (Brazil), and papaya virus E (Ecuador) should be taxonomically classified in the species Papaya cytorhabdovirus. Due to Natural mutations, the glycoprotein (G) and P4 genes were impaired in citrus-infecting isolates of CiaRV, resulting in an atypical rhabdovirus genome organization of 3' leader-N-P-P3-M-L-5' trailer. The P3 protein of CiaRV shared a common origin with begomoviral movement proteins (family Geminiviridae). Secondary structure analysis and trans-complementation of movement-deficient tomato mosaic virus and potato virus X mutants by CiaRV P3 supported its function in viral cell-to-cell trafficking. The wide geographical dispersal of CiaRV and related viruses suggests an efficient transmission mechanism, as well as an underlying risk to global agriculture. Both the Natural phenomenon and experimental analyses demonstrated presence of the "degraded" type of CiaRV in citrus, in parallel to "undegraded" types in other host plant species. This case study shows a plant virus losing the function of an important but nonessential gene, likely due to host shift and adaption, which deepened our understanding of course of Natural viral diversification.

  • Natural Defect of a plant rhabdovirus glycoprotein gene: a case study of virus-plant co-evolution.
    Phytopathology, 2020
    Co-Authors: Song Zhang, Aijun Huang, Xin Zhou, Ralf G Dietzgen, Changyong Zhou, Mengji Cao
    Abstract:

    Seven isolates of a putative cytorhabdovirus (family Rhabdoviridae, order Mononegavirales) designated as citrus-associated rhabdovirus (CiaRV) were identified in citrus, passion fruit, and paper bush from the same geographical area in China. CiaRV, bean-associated cytorhabdovirus (Brazil), and papaya virus E (Ecuador) should be taxonomically classified in the species Papaya cytorhabdovirus. Due to Natural mutations, the glycoprotein (G) and P4 genes were impaired in citrus-infecting isolates of CiaRV, resulting in an atypical rhabdovirus genome organization of 3' leader-N-P-P3-M-L-5' trailer. The P3 protein of CiaRV shared a common origin with begomoviral movement proteins (family Geminiviridae). Secondary structure analysis and trans-complementation of movement-deficient tomato mosaic virus and potato virus X mutants by CiaRV P3 supported its function in viral cell-to-cell trafficking. The wide geographical dispersal of CiaRV and related viruses suggests an efficient transmission mechanism, as well as an underlying risk to global agriculture. Both the Natural phenomenon and experimental analyses demonstrated presence of the "degraded" type of CiaRV in citrus, in parallel to "undegraded" types in other host plant species. This case study shows a plant virus losing the function of an important but non-essential gene, likely due to host shift and adaption, which deepened our understanding of course of Natural viral diversification.

Song Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Natural Defect of a plant rhabdovirus glycoprotein gene a case study of virus plant coevolution
    Phytopathology, 2020
    Co-Authors: Song Zhang, Aijun Huang, Xin Zhou, Ralf G Dietzgen, Changyong Zhou, Mengji Cao
    Abstract:

    Seven isolates of a putative cytorhabdovirus (family Rhabdoviridae, order Mononegavirales) designated as citrus-associated rhabdovirus (CiaRV) were identified in citrus, passion fruit, and paper bush from the same geographical area in China. CiaRV, bean-associated cytorhabdovirus (Brazil), and papaya virus E (Ecuador) should be taxonomically classified in the species Papaya cytorhabdovirus. Due to Natural mutations, the glycoprotein (G) and P4 genes were impaired in citrus-infecting isolates of CiaRV, resulting in an atypical rhabdovirus genome organization of 3' leader-N-P-P3-M-L-5' trailer. The P3 protein of CiaRV shared a common origin with begomoviral movement proteins (family Geminiviridae). Secondary structure analysis and trans-complementation of movement-deficient tomato mosaic virus and potato virus X mutants by CiaRV P3 supported its function in viral cell-to-cell trafficking. The wide geographical dispersal of CiaRV and related viruses suggests an efficient transmission mechanism, as well as an underlying risk to global agriculture. Both the Natural phenomenon and experimental analyses demonstrated presence of the "degraded" type of CiaRV in citrus, in parallel to "undegraded" types in other host plant species. This case study shows a plant virus losing the function of an important but nonessential gene, likely due to host shift and adaption, which deepened our understanding of course of Natural viral diversification.

  • Natural Defect of a plant rhabdovirus glycoprotein gene: a case study of virus-plant co-evolution.
    Phytopathology, 2020
    Co-Authors: Song Zhang, Aijun Huang, Xin Zhou, Ralf G Dietzgen, Changyong Zhou, Mengji Cao
    Abstract:

    Seven isolates of a putative cytorhabdovirus (family Rhabdoviridae, order Mononegavirales) designated as citrus-associated rhabdovirus (CiaRV) were identified in citrus, passion fruit, and paper bush from the same geographical area in China. CiaRV, bean-associated cytorhabdovirus (Brazil), and papaya virus E (Ecuador) should be taxonomically classified in the species Papaya cytorhabdovirus. Due to Natural mutations, the glycoprotein (G) and P4 genes were impaired in citrus-infecting isolates of CiaRV, resulting in an atypical rhabdovirus genome organization of 3' leader-N-P-P3-M-L-5' trailer. The P3 protein of CiaRV shared a common origin with begomoviral movement proteins (family Geminiviridae). Secondary structure analysis and trans-complementation of movement-deficient tomato mosaic virus and potato virus X mutants by CiaRV P3 supported its function in viral cell-to-cell trafficking. The wide geographical dispersal of CiaRV and related viruses suggests an efficient transmission mechanism, as well as an underlying risk to global agriculture. Both the Natural phenomenon and experimental analyses demonstrated presence of the "degraded" type of CiaRV in citrus, in parallel to "undegraded" types in other host plant species. This case study shows a plant virus losing the function of an important but non-essential gene, likely due to host shift and adaption, which deepened our understanding of course of Natural viral diversification.

Aijun Huang - One of the best experts on this subject based on the ideXlab platform.

  • Natural Defect of a plant rhabdovirus glycoprotein gene a case study of virus plant coevolution
    Phytopathology, 2020
    Co-Authors: Song Zhang, Aijun Huang, Xin Zhou, Ralf G Dietzgen, Changyong Zhou, Mengji Cao
    Abstract:

    Seven isolates of a putative cytorhabdovirus (family Rhabdoviridae, order Mononegavirales) designated as citrus-associated rhabdovirus (CiaRV) were identified in citrus, passion fruit, and paper bush from the same geographical area in China. CiaRV, bean-associated cytorhabdovirus (Brazil), and papaya virus E (Ecuador) should be taxonomically classified in the species Papaya cytorhabdovirus. Due to Natural mutations, the glycoprotein (G) and P4 genes were impaired in citrus-infecting isolates of CiaRV, resulting in an atypical rhabdovirus genome organization of 3' leader-N-P-P3-M-L-5' trailer. The P3 protein of CiaRV shared a common origin with begomoviral movement proteins (family Geminiviridae). Secondary structure analysis and trans-complementation of movement-deficient tomato mosaic virus and potato virus X mutants by CiaRV P3 supported its function in viral cell-to-cell trafficking. The wide geographical dispersal of CiaRV and related viruses suggests an efficient transmission mechanism, as well as an underlying risk to global agriculture. Both the Natural phenomenon and experimental analyses demonstrated presence of the "degraded" type of CiaRV in citrus, in parallel to "undegraded" types in other host plant species. This case study shows a plant virus losing the function of an important but nonessential gene, likely due to host shift and adaption, which deepened our understanding of course of Natural viral diversification.

  • Natural Defect of a plant rhabdovirus glycoprotein gene: a case study of virus-plant co-evolution.
    Phytopathology, 2020
    Co-Authors: Song Zhang, Aijun Huang, Xin Zhou, Ralf G Dietzgen, Changyong Zhou, Mengji Cao
    Abstract:

    Seven isolates of a putative cytorhabdovirus (family Rhabdoviridae, order Mononegavirales) designated as citrus-associated rhabdovirus (CiaRV) were identified in citrus, passion fruit, and paper bush from the same geographical area in China. CiaRV, bean-associated cytorhabdovirus (Brazil), and papaya virus E (Ecuador) should be taxonomically classified in the species Papaya cytorhabdovirus. Due to Natural mutations, the glycoprotein (G) and P4 genes were impaired in citrus-infecting isolates of CiaRV, resulting in an atypical rhabdovirus genome organization of 3' leader-N-P-P3-M-L-5' trailer. The P3 protein of CiaRV shared a common origin with begomoviral movement proteins (family Geminiviridae). Secondary structure analysis and trans-complementation of movement-deficient tomato mosaic virus and potato virus X mutants by CiaRV P3 supported its function in viral cell-to-cell trafficking. The wide geographical dispersal of CiaRV and related viruses suggests an efficient transmission mechanism, as well as an underlying risk to global agriculture. Both the Natural phenomenon and experimental analyses demonstrated presence of the "degraded" type of CiaRV in citrus, in parallel to "undegraded" types in other host plant species. This case study shows a plant virus losing the function of an important but non-essential gene, likely due to host shift and adaption, which deepened our understanding of course of Natural viral diversification.

Xin Zhou - One of the best experts on this subject based on the ideXlab platform.

  • Natural Defect of a plant rhabdovirus glycoprotein gene a case study of virus plant coevolution
    Phytopathology, 2020
    Co-Authors: Song Zhang, Aijun Huang, Xin Zhou, Ralf G Dietzgen, Changyong Zhou, Mengji Cao
    Abstract:

    Seven isolates of a putative cytorhabdovirus (family Rhabdoviridae, order Mononegavirales) designated as citrus-associated rhabdovirus (CiaRV) were identified in citrus, passion fruit, and paper bush from the same geographical area in China. CiaRV, bean-associated cytorhabdovirus (Brazil), and papaya virus E (Ecuador) should be taxonomically classified in the species Papaya cytorhabdovirus. Due to Natural mutations, the glycoprotein (G) and P4 genes were impaired in citrus-infecting isolates of CiaRV, resulting in an atypical rhabdovirus genome organization of 3' leader-N-P-P3-M-L-5' trailer. The P3 protein of CiaRV shared a common origin with begomoviral movement proteins (family Geminiviridae). Secondary structure analysis and trans-complementation of movement-deficient tomato mosaic virus and potato virus X mutants by CiaRV P3 supported its function in viral cell-to-cell trafficking. The wide geographical dispersal of CiaRV and related viruses suggests an efficient transmission mechanism, as well as an underlying risk to global agriculture. Both the Natural phenomenon and experimental analyses demonstrated presence of the "degraded" type of CiaRV in citrus, in parallel to "undegraded" types in other host plant species. This case study shows a plant virus losing the function of an important but nonessential gene, likely due to host shift and adaption, which deepened our understanding of course of Natural viral diversification.

  • Natural Defect of a plant rhabdovirus glycoprotein gene: a case study of virus-plant co-evolution.
    Phytopathology, 2020
    Co-Authors: Song Zhang, Aijun Huang, Xin Zhou, Ralf G Dietzgen, Changyong Zhou, Mengji Cao
    Abstract:

    Seven isolates of a putative cytorhabdovirus (family Rhabdoviridae, order Mononegavirales) designated as citrus-associated rhabdovirus (CiaRV) were identified in citrus, passion fruit, and paper bush from the same geographical area in China. CiaRV, bean-associated cytorhabdovirus (Brazil), and papaya virus E (Ecuador) should be taxonomically classified in the species Papaya cytorhabdovirus. Due to Natural mutations, the glycoprotein (G) and P4 genes were impaired in citrus-infecting isolates of CiaRV, resulting in an atypical rhabdovirus genome organization of 3' leader-N-P-P3-M-L-5' trailer. The P3 protein of CiaRV shared a common origin with begomoviral movement proteins (family Geminiviridae). Secondary structure analysis and trans-complementation of movement-deficient tomato mosaic virus and potato virus X mutants by CiaRV P3 supported its function in viral cell-to-cell trafficking. The wide geographical dispersal of CiaRV and related viruses suggests an efficient transmission mechanism, as well as an underlying risk to global agriculture. Both the Natural phenomenon and experimental analyses demonstrated presence of the "degraded" type of CiaRV in citrus, in parallel to "undegraded" types in other host plant species. This case study shows a plant virus losing the function of an important but non-essential gene, likely due to host shift and adaption, which deepened our understanding of course of Natural viral diversification.