After I had used NetZero a few times, an ambiguous error message began cropping up on my computer: "691: member ID/ password invalid OR we may have temporary system difficulties".
In some centres, the findings reflected local system difficulties.
He also notes the lack of a virtual keyboard or accessible file system, difficulties getting.mpg and.wmv files to play, and that the handset gets "extremely hot" while charging.
They felt it was often difficult to maintain momentum given system difficulties such as obtaining funding or access to transport.
However, behavioural intention is influenced by facilitating conditions associated with the presence of the resources and the knowledge required to use the system, the degree of compatibility of the new system with other systems in use and the availability of assistance in the case of system difficulties.
We then had a screening tool of 7 questions which asked participants about difficulties using the various parts of their musculoskeletal system difficulties with walking, whether they used a mobility aid, whether they felt they had any physical deformity, and the duration of their impairment (Table 1).
In mechanical systems, difficulty of the exact determination of friction force parameters adversely affects the accuracy of the models.
In the visual and auditory systems, difficulty of segregation is related to the similarity between features of the figure and the background.
In patients with more than two levels of instrumentation, we have found unique limitations in the instrumentation systems, difficulty with pedicle cannulation, and complexity of rod delivery.
