Such an energy increment would be difficult to be provided by the electrochemical potential of protons, for example, in a PMF-driven transporter, which generates ~6RT energy per cycle (Jiang et al., 2013).
Considering that a background-free neutron field from an accelerator-driven neutron source dedicated to BNCT application is generally difficult to be provided, the characterization of such a neutron field will have to be clearly assessed.
In the United States and Europe, people living with AIDS received treatment to keep them alive, but there was a widely held view that treatment was too expensive and too difficult to be provided successfully in the developing world.
The second limitation may be difficult to overcome, especially if service is to be provided 24/24 h and 7/7 days.
31 Reasons for the discrepancy are as follows: firstly, it is difficult to effectively provide catastrophic insurance coverage for all residents because of insufficient funds, which leads to high out-of-pocket expenses for patients with catastrophic illness.
This suggests that expert opinion in the area of harm minimisation has not changed greatly over the past 6 years, and that it is an area that is difficult to provide advice in, with no consensus on whether first aiders should remove self-injury instruments, provide sterile instruments or ensure medical first aid supplies are available.
The ambiguity of this ranking tends to suggest: 'smartness' is not only something which it is difficult to provide an acceptable performance-based definition of but also offer an explanation for, even by those cities that are awarded with such a status.
The result is that it is "difficult to provide an overall picture of what needs to be done and identify the additional investment needed".
"If a department is short-staffed that day, there may be times it is difficult to provide immediate coverage," DeYoung said in an e-mail.
"Up to now it's been difficult to provide adequate fashion content to a large-sized customer," said Jeff Van Sinderen, a retail analyst at B. Riley, a research and investment firm.
