There are some conventional inspection methods for the detection of the reinforcing bar's corrosion but they can be invasive and destructive, often laborious, and lane closure is required and it is difficult or unreliable for any quantification of corrosion.
Whilst this method can identify patterns of disease, and potentially separate cases from non-diseased controls, the complexity of the clinical interpretation required means it is difficult to relate these findings to traditional studies using routine biochemical measures.
The questions relating to breathlessness whilst wheezing and wheeze in the absence of a cold (questions 3.1 and 3.2) are conditional on the reporting of wheeze at any time (question 3) and therefore although the model for the prediction of asthma probability requires them, it is difficult to place a clinical interpretation on their values.
Trafikverket's software tools for analysis do not provide all the required functionalities; therefore, it is difficult to do additional analysis or calculations to better understand track degradation.
Since PTG is measured by self-report questionnaires that require retrospective evaluation, it is difficult to know whether perceived positive changes after trauma reflect actual positive changes.
The modern family requires two working partners; it is difficult for a parent to take time off work for an extended period.
Solving problem (19) requires significant complexity and it is difficult to analyze.
In this case, solving (3) requires significant complexity, and it is difficult to analyze.
Because the current model does not require a concrete goal, it is difficult to evaluate the collaboration's effect, whether it was a success, and how it can be improved.
Unlike CO-Hb, however, the measurement of ETCO requires a sophisticated device, and it is difficult to measure ETCO levels in infants who require high frequency oscillatory ventilation or nasal continuous positive airway pressure ventilation.
For example, crude proxies or indicators may be required for services for which it is difficult to obtain accurate, spatially explicit measures of supply and demand (e.g., flood mitigation; see Holland et al. ).
