With significant monopoly power, government-run public hospitals are often shielded from outside inspection and competition, says Zhu Hengpeng of the Chinese Academy of Social Sciences.
Evaluating the quality of child abuse cases is made more difficult because they get filtered through a welter of different laws in different countries and the details are often shielded from public view by laws protecting information in continuing investigations and in cases involving minors.
"We appreciate that rural areas will feel the effects of HS2 more than urban areas, where major construction projects are commonplace and properties relatively close to railways or building sites are often shielded from their effects by other buildings and background noise".
Even more importantly, the identities of the workers themselves are often shielded from the customer on these platforms.
Mahli-Ann Butt, the Australian academic behind this research, says in some ways being a "gamer girlfriend" is positive: by gaming with their partners, women are often shielded from the online harassment prevalent in the gaming public.
The specialized immune system cells, known as T-cells, will attack if they locate the flags, but they are often shielded by cancer defenses or hidden because tumors change and mutate so much.
But of course, unlike the far majority of those caught within the cruel cycles of the correctional system, the mistakes we make are often shielded by a swath of social institutions and fortified with unwritten communal codes.
(This is often to shield the hotel from liability if something goes wrong).
The process is often called "cocooning," shielding children from as much American culture as possible, by banning TV, the Internet and newspapers and sending them to Islamic schools.
These areas are often heavily shielded and must be hit repeatedly to remove armor.
