Coding Schemes for a Class of Receiver Message Side Information in AWGN Broadcast Channels

This paper considers the three-receiver AWGN broadcast channel where the receivers (i) have private-message requests and (ii) know some of the messages requested by other receivers as side information. For this setup, all possible side information configurations have been recently classified into eight groups and the capacity of the channel has been established for six groups (Asadi et al., ISIT 2014). We propose inner and outer bounds for the two remaining groups, groups 4 and 7. A distinguishing feature of these two groups is that the weakest receiver knows the requested message of the strongest receiver as side information while the in-between receiver does not. For group 4, the inner and outer bounds coincide at certain regions. For group 7, the inner and outer bounds coincide, thereby establishing the capacity, for four members out of all eight members of the group; for the remaining four members, the proposed bounds reduce the gap between the best known inner and outer bounds.Comment: accepted and to be presented at the 2014 IEEE Information Theory Workshop (ITW

Optimal Coding Schemes for the Three-Receiver AWGN Broadcast Channel with Receiver Message Side Information

This paper investigates the capacity region of the three-receiver AWGN broadcast channel where the receivers (i) have private-message requests and (ii) may know some of the messages requested by other receivers as side information. We first classify all 64 possible side information configurations into eight groups, each consisting of eight members. We next construct transmission schemes, and derive new inner and outer bounds for the groups. This establishes the capacity region for 52 out of 64 possible side information configurations. For six groups (i.e., groups 1, 2, 3, 5, 6, and 8 in our terminology), we establish the capacity region for all their members, and show that it tightens both the best known inner and outer bounds. For group 4, our inner and outer bounds tighten the best known inner bound and/or outer bound for all the group members. Moreover, our bounds coincide at certain regions, which can be characterized by two thresholds. For group 7, our inner and outer bounds coincide for four members, thereby establishing the capacity region. For the remaining four members, our bounds tighten both the best known inner and outer bounds.Comment: Authors' final version (to appear in IEEE Transactions on Information Theory

The Capacity of Three-Receiver AWGN Broadcast Channels with Receiver Message Side Information

This paper investigates the capacity region of three-receiver AWGN broadcast channels where the receivers (i) have private-message requests and (ii) know the messages requested by some other receivers as side information. We classify these channels based on their side information into eight groups, and construct different transmission schemes for the groups. For six groups, we characterize the capacity region, and show that it improves both the best known inner and outer bounds. For the remaining two groups, we improve the best known inner bound by using side information during channel decoding at the receivers.Comment: This is an extended version of the same-titled paper submitted to IEEE International Symposium on Information Theory (ISIT) 201

A Unified Scheme for Two-Receiver Broadcast Channels with Receiver Message Side Information

This paper investigates the capacity regions of two-receiver broadcast channels where each receiver (i) has both common and private-message requests, and (ii) knows part of the private message requested by the other receiver as side information. We first propose a transmission scheme and derive an inner bound for the two-receiver memoryless broadcast channel. We next prove that this inner bound is tight for the deterministic channel and the more capable channel, thereby establishing their capacity regions. We show that this inner bound is also tight for all classes of two-receiver broadcast channels whose capacity regions were known prior to this work. Our proposed scheme is consequently a unified capacity-achieving scheme for these classes of broadcast channels.Comment: accepted and to be presented at the 2015 IEEE International Symposium on Information Theory (ISIT 2015

A Systematic Review of Phytochemical and Phytotherapeutic Characteristics of Bitter Almond

Bitter almond is one of the medicinal plants that have been used to prevent and treat diseases since many centuries ago. Bitter almond essential oil can be effectively used to heal wounds, hemorrhoids and hair loss, relieve joint pain, facilitate delivery, and strengthen and condition hairs. Moreover, oral use of bitter almond seed has been demonstrated to cause antioxidant, antibacterial, and anticancer effects because of containing certain compounds such as amygdalin. However, there have been some challenges in investigations conducted to discover bitter almond-based oral, herbal drugs to treat different diseases such as cancer because of cyanide-induced poisoning, partly precluding use of this plant. This study was conducted to comprehensively review the traditional uses, phytochemical compounds, and therapeutic actions of bitter almond and its compound as well as the side effects due to use of them

EFFICACY AND MECHANISMS OF MEDICINAL PLANTS AS IMMUNOTHERAPY IN TREATMENT OF ALLERGIC RHINITIS: A SYSTEMATIC REVIEW

Allergic rhinitis is a common disease of immune system that negatively affects general health, quality of life, and social relationships. In the recent years, many studies have been conducted to discover novel treatments for this disease particularly using natural products. Here, we review findings of recent studies that harness medicinal plants and phyto-therapies in oriental medicine that have effectively reduced allergic rhinitis complications. We also assess the use of medicinal plants and their derivatives in oriental medicine to treat allergic rhinitis. In addition, these agents have been reported to be used in combination with each other or separately as complementary therapies and even, in some cases, alternative therapies instead of chemical drugs. These plants display their anti-allergy effects through affecting immunoglobulin and inhibiting different cytokines and interleukins. Medicinal plants and traditional approaches can still offer new therapeutic alternatives to researchers and pharmacists so that these alternatives may further contribute to allergic rhinitis drug discovery