"difficult face" is a correct and usable phrase in written English, oftentimes used to describe a person's expression when they are trying to hide their feelings.
For example: "He wore a difficult face as he tried to conceal his disappointment."
Suggested descriptions of the difficult airway include but are not limited to difficult face mask ventilation, difficult laryngoscopy, difficult tracheal intubation and failed intubation.
This paper concentrates specifically on soft biometrics as opposed to extended attributes, and presents the results from three experiments quantifying performance gains on a difficult face recognition task when standard face recognition algorithms are augmented using soft biometrics.
For the car classification problem, magnitude-based pruning yields competitive results, whereas for the more difficult face classification, we find that the evolutionary approach to NN design is clearly preferable.
Strategies have included being the first to blaze a new route up a difficult face of an already-summitted mountain; the first to climb an existing route in winter; the first to ski down a mountain; and the first to reach the summit of a difficult peak without the assistance of ropes, anchors or bolts.
There is today an increasing interest in studying difficult face mask ventilation.
Fourth: the study confirms the importance of neck circumference, BMI and OSA in the difficult face mask ventilation paradigm.
According to this supervisor, the Wikispace provided a non-confrontational means through which students could be honest and open in a way that some would find difficult face-to-face.
Also, some of these changes, including but not limited to, atrophy of the muscles around the lips and an edentulous mouth, affect bag mask ventilation due to a difficult face-mask seal.
If you have trouble with difficult face-to-face conversations, try scripting what you want to say, or writing a letter or email.
"It's very difficult to face this pressure," he said.
Sometimes it's very difficult to face this situation.
