The latter requires highly contextualized data that is challenging to acquire.
In reverse engineering, it is very challenging to acquire the 3D profile information of an object rapidly with high accuracy.
As shown in Fig. 2, the actual TOA locates before the maximum energy, which is challenging to acquire due to the first arriving path which cannot be detected.
Sonographic findings for nursemaid's elbow have been reported [17]; however, in our experience, we have found these findings to be more technically challenging to acquire than scanning for the posterior fat pad sign.
Information on forest resources in tropical developing countries is challenging to acquire due to financial and logistical constraints (Holmgren and Marklund 2007; Skutsch and Ba 2010; Stringer et al. 2012).
In contrast with the general opinion that TLH is characterized as a procedure rather challenging to acquire, several studies show a reasonable learning curve not seldom similar to conventional open methods [16, 17, 18, 19].
They encounter however barriers in practical application due to the following characteristics: medical models are very challenging to acquire, the need for deep control knowledge by the user, lack of safe measurement and actuation devices, and finally, the abstraction from real world problems.
"No one must present documents, that, for some, have proved challenging to acquire; no one must show a birth certificate, proof of citizenship, and the like," the court noted, quoting the state from a prior legal filing.
Such emission spectra can be challenging to acquire, adding significant complexity to two-photon instrumentation and often resulting in poor signal to noise.
These findings will undoubtedly focus attention on obtaining more information on the geochemistry of formation fluids from deep ocean rocks, which are technically challenging to acquire requiring different sampling technologies than those used in the design of this exploratory study.
