Aircrew survival equipment is for pilots' survival when they have to parachute or land in various bad situations. Introduction relating to survival equipment is given including development course, sorts, carrying methods, its role in aviation survival and its development tendency. It is indicated that survival equipment will still play an important role in aviation survival within quite a time and it is also imperative to perfect aircrew survival equipment system from improving its performance, increasing its tactical using background and improving its supply system of ordering goods.

Objective To develop a more reliable blinking emergency location transmitter with longer time for aircrew in distress. Methods The new LED and new type of explosion-proof casing material (Polycarbonate) with new technologies are adopted. Results Environmental tests and performance tests were done on the new emergency location transmitter according to the environmental requirements of aeronautic products. Conclusion The new emergency location transmitter can meet the operation requirements for aircrew in distress.

OBJECTIVETo study the significance of P504s in differential diagnosis between solid pseudopapillary tumor of the pancreas (SPTP) and pancreatic neuroendocrine tumors (PanNET).

METHODSForty-three patients with SPTP and 41 patients with PanNET encountered during the period from 2007 to 2014 were recruited. Immunohistochemical study for vimentin, CD10, chromogranin A, synaptophysin, beta-catenin, CD99 and P504s in SPTP and PanNET was performed. The diagnostic value of P504s in differentiating SPTP from PanNET was analyzed.

RESULTSImmunohistochemical study showed that vimentin, CD10, chromogranin A, synaptophysin and CD99 were expressed both in SPTP and PanNET. All cases of SPTP showed granular cytoplasmic expression of P504s, whereas those of PanNET were negative.

CONCLUSIONP504s is a sensitive and useful marker for SPTP and can be used in the distinction between SPTP and PanNET.