Application Layer ARQ Algorithm for Real-Time Multi-Source Data Streaming in UAV Networks.

Because of the specific characteristics of Unmanned Aerial Vehicle (UAV) networks and real-time applications, the trade-off between delay and reliability imposes problems for streaming video. Buffer management and drop packets policies play a critical role in the final quality of the video received by the end station. In this paper, we present a reactive buffer management algorithm, called Multi-Source Application Layer Automatic Repeat Request (MS-AL-ARQ), for a real-time non-interactive video streaming system installed on a standalone UAV network.

Rare cause of dysuria: eosinophilic cystitis.

Eosinophilic cystitis is an inflammatory condition characterized by eosinophilic infiltration of whole layers of the bladder wall. The condition occurs more commonly in adults. We report a case of eosinophilic cystitis mimicking a bladder tumor in a 5-year-old boy with symptoms of dysuria and urinary incontinence.

[The conservation of the genetic resources of deer (Cervidae) by the cryopreservation of their germ cells].

Necessity of organization of a cryobank for the sperm of some taxa has been substantiated on the basis of the published data and authors' results concerning the state of genetic resources of the family Cervidae in Russia. A task has also been set to elucidate some factors that may affect the success of cryoconservation, such as the age of male donors; season; duration of sperm storage before and after freezing, including long-term storage; and the possibility of obtaining of sperm from perished males. Results are provided on the influence of these factors of the quality of spermatozoa obtained on three species of the Cervidae.

[Creation of a European bison sperm cryobank as a method for preserving the genetic polymorphism of the species].

Sperm was taken from one alive (by electroejaculation) and two dead (from epididymis tissue) wisent males, and was conserved by the method similar to that used to freeze sperm from cattle. Spermatozoon mobility and acrosome conditions underwent no noticeable changes when kept under preservation. Eight cows were fertilized with the sperm which had been kept in liquid nitrogen for three years.