On iterative performance of LDPC and Root-LDPC codes over block-fading channels

This paper presents our investigation on iterativedecoding performances of some sparse-graph codes on block-fading Rayleigh channels. The considered code ensembles are standard LDPC codes and Root-LDPC codes, first proposed in and shown to be able to attain the full transmission diversity. We study the iterative threshold performance of those codes as a function of fading gains of the transmission channel and propose a numerical approximation of the iterative threshold versus fading gains, both both LDPC and Root-LDPC codes.Also, we show analytically that, in the case of 2 fading blocks,the iterative threshold root of Root-LDPC codes is proportional to (��1 ��2)1, where ��1 and ��2 are corresponding fading gains.From this result, the full diversity property of Root-LDPC codes immediately follows.

Asymptotic capacity of static multiuser channels with an unknown number of users

We examine a multiple-access communication system in which multiuser detection is performed without knowledge of the number of active interferers. Using a statistical-physics approach, we compute the single-user channel capacity and spectral efficiency in the large-system limit.

K. Iran i la proliferaci�� nuclear

Cont��: ��Ir��n, potencia nuclear?; El reto nuclear de Ir��n; Dos respuestas al reto nuclear; Con la vista puesta en Ir��n; La provocaci��n nuclear norcoreana; Ir��n y la oferta de Obama

Transcriptional and functional profiles of voltage-gated Na(+) channels in injured and non-injured DRG neurons in the SNI model of neuropathic pain.

Changes in expression and function of voltage-gated sodium channels (VGSC) in dorsal root ganglion (DRG) neurons may play a major role in the genesis of peripheral hyperexcitability that occurs in neuropathic pain. We present here the first description of changes induced by spared nerve injury (SNI) to Na(v)1 mRNA levels and tetrodotoxin-sensitive and -resistant (TTX-S/TTX-R) Na(+) currents in injured and adjacent non-injured small DRG neurons. VGSC transcripts were down-regulated in injured neurons except for Na(v)1.3, which increased, while they were either unchanged or increased in non-injured neurons. TTX-R current densities were reduced in injured neurons and the voltage dependence of steady-state inactivation for TTX-R was positively shifted in injured and non-injured neurons. TTX-S current densities were not affected by SNI, while the rate of recovery from inactivation was accelerated in injured neurons. Our results describe altered neuronal electrogenesis following SNI that is likely induced by a complex regulation of VGSCs.

Fantaisie en ut mineur, K 475 / Mozart, comp. ; revue et annot��e par Lazare-L��vy ; Lazare-L��vy, p

Titre uniforme : [Fantaisies. Piano. KV 475. Do mineur]

Carte g��n��rale de la Turquie d'Europe �� la droite du danube ou des beglerbegliks de Roum Jli, Bosna et Mor��e : dress��e d'apr��s les meilleurs observations astronomiques, itin��raires, cartes particuli��res, & reconnaissances existantes jusqu'�� ce jour / par F. Guillaume de Vaudoncourt, ... ; K. Wimberger graviert ; die Geb��rge gravirt v. I. P��ringer ; In Stein gravirt von A. Falger u:L. Zertahelly in M��nchen ; beschrieben und die Gebirge gravirt v. L. Zertahelly

��chelle(s) : [1:1 337 000 environ], Lieues de France, de 25 au degr��, 30 [= 9,8 cm]

[Archives de la Parole]. , [The king and the margosa seed] : r��cit en dravidien, telugu, Province de Madras / [Sir George Grierson], ��d. ; Linguistic survey of India ; [K. Divakara Rao], voix

[Traditions. Asie. Inde. Pr��sidence de Madras [i.e. Chennai]. Ceded Districts]

[Archives de la Parole]. , [The silly weaver girl] : r��cit (dravidien, Malayalam, Province de Madras) / [Sir George Grierson], ��d. ; Linguistic survey of India ; [C.K. Gopalamenon], voix

[Traditions. Asie. Inde. Pr��sidence de Madras [i.e. Chennai]. Etat du Kerala. R��gion du Malabar]

[Archives de la Parole]. , La parabole de l'enfant prodigue : dravidien, malay��lam, province de Madras / [Sir George Grierson], ��d. ; Linguistic survey of India ; [K.K. Achyutan], voix

[Traditions. Asie. Inde. Province de Madras [i.e. Chennai]. ��tat du K��rala. Kochi]

[Archives de la Parole]. , [Song addressed to a maiden] : [in Amindivi Malay�����am] / [Sir George Grierson], ��d. ; Linguistic survey of India ; [Kilaveliyan Muhammad K��ya], voix

[Traditions. Asie. Inde. Province de Madras [i.e. Chennai]. ��tat de Karnataka. R��gion du Kanara]