Results 91 to 100 of about 6,552 (125)

Tail docking and tail biting in pigs

Veterinary Record, 2019
I write to voice my concern over a recent ethics case study published in In Practice (March 2019, vol 41, pp 88-91) that outlines a particular scenario on a pig farm where tail docking of pigs is addressed. This particular ethics case comes at a time when there is a huge amount of drive and progress being made within the pig sector to change protocols
openaire   +2 more sources

The effect of biting tails and having tails bitten in pigs

Physiology & Behavior, 2012
Tail-biting is a behavioral abnormality which compromises the welfare of pigs. The goal of this study was to characterize the tail-biting phenotype using behavior and measures of heart-rate (HR) and its variability (HRV) in pigs. Thirty pigs were categorized as tail-biters (n=10), tail-bite victims (n=10), and control pigs (n=10) based on the frequency
Manja, Zupan, Andrew M, Janczak, Tore, Framstad, Adroaldo J, Zanella   +3 more
openaire   +2 more sources

Tail-Biting LDPC Convolutional Codes

2007 IEEE International Symposium on Information Theory, 2007
In this paper, the tail-biting version of the low-density parity-check convolutional codes (LDPCCCs) is introduced and investigated. The definition of the tail-biting LDPCCCs (TB-LDPCCCs) is given through their parity-check matrices and the basic ideas behind the architectures of the encoders and decoders for these codes are also presented. In addition,
Marcos B. S. Tavares, Kamil Sh. Zigangirov, Gerhard P. Fettweis   +2 more
openaire   +1 more source

Tail-biting in outdoor pig production

The Veterinary Journal, 2006
A study was performed in five identical outdoor production units in the same geographic area using growing-finishing pigs of similar genetic makeup, age, diet and feed management. The severity of tail-biting (TS) was scored 1-4. The average group prevalence of bitten tails at slaughter on different farms was between 14.1+/-2.1% and 20.1+/-3.0 ...
P K, Walker, G, Bilkei
openaire   +2 more sources

Tail-Biting Globally-Coupled LDPC Codes

IEEE Transactions on Communications, 2019
This paper presents a new type of globally-coupled low-density parity-check (GC-LDPC) codes whose base matrix has a cyclic structure in the global part. Therefore, the resulting codes are referred to as tail-biting GC-LDPC (TB-GC-LDPC) codes. We propose two methods to construct TB GC quasi-cyclic LDPC (TB-GC-QC-LDPC) codes. For the first method, we
Ji Zhang 0004, Baoming Bai, Shuangyang Li, Min Zhu 0003, Huaan Li   +4 more
openaire   +1 more source

On the Algebraic Structure of Linear Tail-Biting Trellises

IEEE Transactions on Information Theory, 2015
Tail-biting trellises are important graphical representations of codes, which can be simpler to decode than conventional trellises. While conventional trellises are well understood, the general theory of (tail-biting) trellises is still under development.
David Conti, Nigel Boston
openaire   +1 more source

Tail-biting and tail-docking in pigs.

The Veterinary record, 1998
W J, Smith, R H, Penny
  +12 more sources

Extended tail-biting schemes for turbo codes

IEEE Communications Letters, 2005
In this letter, we investigate the problem of using tailbiting recursive systematic convolutional (RSC) codes in turbo codes. Tailbiting is not always possible for a given RSC code with fixed length. We propose an extended tailbiting method for RSC codes and compare it with another extension method proposed by Van Stralen, et al. (IEE Electron.
Jing Sun, Oscar Y. Takeshita
openaire   +1 more source

An Investigation into Tail-Biting among Fattening Pigs

British Veterinary Journal, 1969
SUMMARY Tail-biting and cannibalism are not identical conditions. Cannibalism may have many causes. It can also be a sequel to tail-biting. Tail-biting implies that a single pig grabs a tail transversely in its mouth. Groups of pigs never chase a single animal as is the habit in cannibalism. From many visits to piggeries and discussions with experts
openaire   +2 more sources

A Snake that Bites its Tail

2003
The dynamic of structures and metastructures lies at the heart of any semiotic activity. This chapter explains this phenomenon and suggests acknowledging its importance for understanding the reification of the world.
openaire   +1 more source