SatCat5: A Low-Power, Mixed-Media Ethernet Network for Smallsats

In any satellite, internal bus and payload systems must exchange a variety of command, control, telemetry, and mission-data. In too many cases, the resulting network is an ad-hoc proliferation of complex, dissimilar protocols with incomplete system-to-system connectivity. While standards like CAN, MIL-STD-1553, and SpaceWire mitigate this problem, none can simultaneously solve the need for high throughput and low power consumption. We present a new solution that uses Ethernet framing and addressing to unify a mixed-media network. Low-speed nodes (0.1-10 Mbps) use simple interfaces such as SPI and UART to communicate with extremely low power and minimal complexity. High-speed nodes use so-called “media-independent” interfaces such as RMII, RGMII, and SGMII to communicate at rates up to 1000 Mbps and enable connection to traditional COTS network equipment. All are interconnected into a single smallsat-area-network using a Layer-2 network switch, with mixed-media support for all these interfaces on a single network. The result is fast, easy, and flexible communication between any two subsystems. SatCat5 is presented as a free and open-source reference implementation of this mixed-media network switch, with power consumption of 0.2-0.7W depending on network activity. Further discussion includes example protocols that can be used on such networks, leveraging IPv4 when suitable but also enabling full-featured communication without the need for a complex protocol stack

Electron self-trapping on a nano-circle

We study the self-trapping of quasiparticles (electrons, holes, excitons, etc) in a molecular chain with the structure of a ring, taking into account the electron-phonon interaction and the radial and tangential deformations of the chain. A discrete system of equations is obtained and solved numerically. The analytical solutions for the wave function of a quasiparticle and for the molecule displacements that determine the distortion of the ring, are also obtained and solved in the continuum approximation. The numerical solutions of the system of discrete nonlinear equations reveals several regimes of quasiparticle localisation in the chain which depend on the values of the parameters of the system. It is shown that the transversal deformation of the chain favours the formation of a soliton.Comment: 43 pages 9 figure

Applying Records of Extant and Extinct Horseshoe Crab Abnormalities to Xiphosurid Conservation

Xiphosurids are marine chelicerates that have been subject to extensive biological and palaeontological scrutiny over the past two centuries. This research effort is fuelled by the unique anatomical and physiological characteristics of the group, a long fossil record with conserved morphology, and use as modern analogues for understanding extinct arthropod groups. Despite this extensive literature, abnormal xiphosurid specimens are somewhat understudied. Recent studies have documented malformed specimens, the majority of which are attributed to injuries and developmental complications. To augment this recent research, we present records of Limulus polyphemus and Tachypleus tridentatus with malformed with malformed appendages, cephalothoraces, thoracetrons, and telsons. Causes of abnormalities are discussed and attributed to moulting issues and injuries. Three new examples of abnormal fossil xiphosurids are also presented: Euproops danae and Mesolimulus walchi specimens with cephalothoracic injuries and one specimen of M. walchi displaying a curved telson. We conclude that documenting abnormalities within populations may aid identification of spawning areas that require conservation attention. These oddities represent a potential avenue to minimize the population threats currently facing these unique chelicerates

IL23R-protective coding variant promotes beneficial bacteria and diversity in the ileal microbiome in healthy individuals without inflammatory bowel disease

Background and Aims This study aimed to characterize the mucosa-associated microbiota in ileal Crohn's disease [CD] patients and in healthy controls in terms of host genotype and inflammation status. Methods The mucosa-associated microbiotas of intestinal pinch biopsies from 15 ileal CD patients with mild and moderate disease and from 58 healthy controls were analysed based on 16S ribosomal sequencing to determine microbial profile differences between [1] IL23R, NOD2 and ATG16L1 genotypes in healthy subjects, [2] ileal CD patients and control subjects, and [3] inflamed and non-inflamed mucosal tissue in CD patients. Results The protective variant of the IL23R gene [rs11209026] significantly impacted the microbial composition in the ileum of healthy subjects and was associated with an increased abundance of phylotypes within the family Christensenellaceae as well as increases in diversity and richness. Comparative analysis of healthy and non-inflamed CD microbiome samples indicated a notable decrease in the abundance of Faecalibacterium prausnitzii as well as Shannon diversity and richness. Inflamed and non-inflamed ileal samples of CD subjects had high intra-individual stability and inter-individual variability, but no significant alterations in diversity, richness or taxa were identified. Calprotectin correlated positively with the abundance of Proteobacteria and negatively with diversity in the samples from healthy subjects. Conclusions The observation of low diversity and low abundance of beneficial bacteria in healthy control subjects carrying the IL23R [rs11209026] wild-type GG genotype indicates that the gut microbiome is influenced by host genetics and is altered prior to disease diagnosis. Faecal calprotectin may be a potential non-invasive screening tool for dysbiosis in subjects without disorders of intestinal inflammation

Role of the interdisciplinary/multidisciplinary team

This chapter describes the contemporary roles of health professionals in caring for individuals with a chronic illness and/or disability. Every health professional plays an important role in the interdisciplinary/multidisciplinary team. The chapter also discusses the scope of practice implemented by other health professionals through a team approach to support a person with a chronic illness and/or disability. The very nature of chronic illness and/or disability demands that many health disciplines work collaboratively to manage the complexity and variety of health issues that arise

Role of the interdisciplinary/multidisciplinary team

This chapter describes the contemporary roles of health professionals in caring for individuals with a chronic illness and/or disability. Every health professional plays an important role in the interdisciplinary/multidisciplinary team. The scope of practice implemented by these health professionals is also presented. The very nature of chronic illness and/or disability demands that health professionals from a diversity of disciplines work collaboratively to manage the complexity and variety of health issues that arise

The Sarmatian Review, Vol., 35, No. 3

In this issue: Sarmatian Review Data -- Adam Mickiewicz, Pan TadeuszBook Eleven, translated by Christopher A. Zakrzewski -- Bronislaw Wildstein, Czas niedokonany (reviewed by Ewa Thompson) -- Dariusz Skrczewski, Teoria-LiteraturaDyskurs. Pejzai postkolonialny (reviewed by Tamara Trojanowska -- Adam Michnik, The Trouble with History: Morality, Revolution, and Counterrevolution (reviewed by John M. Grondelski) -- Na luku elektrycznym: o pisaniu Andrzeja Bobkowskiego, by Maciej Nowak (reviewed by Maciej Urbanowski) -- Jiri Karsek ze Lvovic, A Gothic Soul, translated by Kirsten Lodge (reviewed by Terrence O'Keefe) -- Literature, Exile, Alterity: The New York Group of Ukrainian Poets, by Maria Rewakowicz (reviewed by Mark Andryczyk) -- MORE BOOKS: Debaty Artes Liberales: Inteligent, humanista, intelektualista, vol. VIII, edited by Katarzyna Tomaszuk -- Andrzej Maksymilian Fredro, Scriptorum Seu Togae/ Fragmenty pism, czyli uwagi o wojnie i pokoju -- Aleksandra Ziolkowska-Boehm, Senator Stanley Haidasz: A Statesman for All Canadians -- LETTERS: James E. Reid, Workers' Rights in Canada, Workers' Rights in Poland -- About the Authors -- Thank You Not

The Sarmatian Review, Vol., 31, No. 2

In this issue: Sarmatian Review Data -- Sarmatian Review Award -- Raymond Gawronski, SJ, Letter to Milosz -- Andrzej Nowak, The Origins of Modern Polish Democracy (review)-- David Goldfarb, Adam Mickiewicz: The Life of a Romantic (review) -- James E. Reid, Zbigniew Herbert: The Collected Prose 1948-1998 (review) -- Mark Edward Ruff, Rome's Most Faithful Daughter: The Catholic Church and Independent Poland (review) -- James R. Thompson, Bundist Counterculture in Interwar Poland (review)-- Beata Tamowska, Andrzej Bursa:Wybr wierszy/Selected Poems (review) -- Sally Boss, Jerzy Pilch's A Thousand Peaceful Cities (review) -- Adam Mickiewicz, Pan Tadeusz (Book Seven), trans. Christopher A. Zakrzewski -- More Books -- About the Authors -

Whole-genome sequence of the oriental lung fluke Paragonimus westermani

Background Foodborne infections caused by lung flukes of the genus Paragonimus are a significant and widespread public health problem in tropical areas. Approximately 50 Paragonimus species have been reported to infect animals and humans, but Paragonimus westermani is responsible for the bulk of human disease. Despite their medical and economic importance, no genome sequence for any Paragonimus species is available. Results We sequenced and assembled the genome of P. westermani, which is among the largest of the known pathogen genomes with an estimated size of 1.1 Gb. A 922.8 Mb genome assembly was generated from Illumina and Pacific Biosciences (PacBio) sequence data, covering 84% of the estimated genome size. The genome has a high proportion (45%) of repeat-derived DNA, particularly of the long interspersed element and long terminal repeat subtypes, and the expansion of these elements may explain some of the large size. We predicted 12,852 protein coding genes, showing a high level of conservation with related trematode species. The majority of proteins (80%) had homologs in the human liver fluke Opisthorchis viverrini, with an average sequence identity of 64.1%. Assembly of the P. westermani mitochondrial genome from long PacBio reads resulted in a single high-quality circularized 20.6 kb contig. The contig harbored a 6.9 kb region of non-coding repetitive DNA comprised of three distinct repeat units. Our results suggest that the region is highly polymorphic in P. westermani, possibly even within single worm isolates. Conclusions The generated assembly represents the first Paragonimus genome sequence and will facilitate future molecular studies of this important, but neglected, parasite group.Full Tex

IEEE Comms Mag LoRa datasets

The data in this repository is associated with the IEEE Communications Magazine article by Manish Nair et al, ‘IoT Device Authentication Using Self-Organizing Feature Map Data Sets