Design of software radio

Software Define Radio (SDR) has become a prevalent technology in wireless systems. In SDR some or all of the signal specific handling is implemented in software functions, while other functions like decimation, interpolation, digital up-conversion and digital down conversion are done on reprogrammable Digital Signal Processor or Field Programmable Gate Arrays.Twelve laboratory exercises have been designed to lead the student through the process of using the Universal Software Radio peripheral (USRP) hardware and GNU Radio open source software

Design of software radio

Software Define Radio (SDR) has become a prevalent technology in wireless systems. In SDR some or all of the signal specific handling is implemented in software functions, while other functions like decimation, interpolation, digital up-conversion and digital down conversion are done on reprogrammable Digital Signal Processor or Field Programmable Gate Arrays.Twelve laboratory exercises have been designed to lead the student through the process of using the Universal Software Radio peripheral (USRP) hardware and GNU Radio open source software

Emotion Knowledge and Relational Aggression in Preschoolers

The preschool years are an important time in a child\u27s emotional development. Children learn how to navigate peer relationships and understand the source of others\u27 emotions, one of the most important tasks of this developmental period. Deficits in emotion knowledge have been linked with increased aggressive behaviors and poor peer acceptance. This study\u27s main objective was to clarify whether emotion knowledge is related to relational aggression in young children. In addition, the role of age, sex, siblings, depressed affect, and peer acceptance and rejection was examined in the context of relational aggression. Sixty-six preschool children from ages 3 to 4 were administered Denham\u27s Affective Knowledge Test (DAKT; Denham, 1986), and both preschool teachers and children completed the Preschool Social Behavior Scale-Teacher and Peer Forms (PSBS-T; PSBS-P; Crick et al., 1997) to assess relationally-aggressive behaviors. Results of the study indicated that four-year-old children engage in more relationally-aggressive behaviors as rated by teachers than three-year-old children. In addition, relationally-aggressive preschool boys experience significantly less peer rejection than non-relationally-aggressive preschool boys. Several additional findings involving emotion knowledge, depressed affect, and peer acceptance and rejection approached significant levels

German POWs Make Colorado Home: Coping by Craft and Exchange

From 1943 to 1946, the U.S. government held over 3,000 German POWs at Camp Trinidad in southern Colorado. In 2013 and 2014, archaeological fieldwork, interviews, and archival research were conducted in order to better understand the daily lives of those incarcerated at the camp. The information gathered about artifacts, environmental features, and personal narratives, reveals insights into the lesser known details of the prisoners\u27 lives. Despite the U.S. military rules and regulations and efforts by American personnel within camp, prisoners created goods they wanted or needed. Acquiring the necessary goods was accomplished through modification of available goods, through scavenging the local built or natural environment to craft desired items, and through exchange of goods between the prisoners and their captors. By creating the goods the prisoners wanted or needed, they were not only able to exert their own power within institutional confinement, they also coped and made-do in their temporary home

Alien Registration- Morine, Emma M. (Medway, Penobscot County)

https://digitalmaine.com/alien_docs/8249/thumbnail.jp

MWS and FWS Codes for Coordinate-Wise Weight Functions

A combinatorial problem concerning the maximum size of the (hamming) weight set of an $[n,k]_q$ linear code was recently introduced. Codes attaining the established upper bound are the Maximum Weight Spectrum (MWS) codes. Those $[n,k]_q$ codes with the same weight set as $\mathbb{F}_q^n$ are called Full Weight Spectrum (FWS) codes. FWS codes are necessarily ``short", whereas MWS codes are necessarily ``long". For fixed $k,q$ the values of $n$ for which an $[n,k]_q$-FWS code exists are completely determined, but the determination of the minimum length $M(H,k,q)$ of an $[n,k]_q$-MWS code remains an open problem. The current work broadens discussion first to general coordinate-wise weight functions, and then specifically to the Lee weight and a Manhattan like weight. In the general case we provide bounds on $n$ for which an FWS code exists, and bounds on $n$ for which an MWS code exists. When specializing to the Lee or to the Manhattan setting we are able to completely determine the parameters of FWS codes. As with the Hamming case, we are able to provide an upper bound on $M(\mathcal{L},k,q)$ (the minimum length of Lee MWS codes), and pose the determination of $M(\mathcal{L},k,q)$ as an open problem. On the other hand, with respect to the Manhattan weight we completely determine the parameters of MWS codes.Comment: 17 page

Zenith Star: A structural control challenge

The Zenith Star Experiment is designed to demonstrate and evaluate the performance of a laser in space to answer critical issues relevant to SDI. The spacecraft design, control system architecture, and vehicle control are discussed

The South Africa-Zimbabwe remittance corridor: an analysis of its characteristics and the cost of remittance payments

Zimbabwean migrants in South Africa often send financial support to their relatives in Zimbabwe. This financial support is known as remittances and is sent as cash or in-kind. This study investigated the characteristics of the South African-Zimbabwe remittance corridor. A critical investigation of the remittance channels used, the type of remittances sent, and the remittance transaction costs involved was done. Data for use in this study was collected through interviews with remittance service providers and by actual remittance transfers to Zimbabwe. A qualitative and quantitative analysis of data using statistical analysis techniques was done. From the analyzed data, it was observed that remittance service providers fall into two channels: formal and informal. The informal remittance channels were found to be the most popular in this corridor. The popularity of informal channels can be attributed to lower transaction costs and a lack of documentation needed from the sender. Informal remittance channels do not require the remittance sender to provide any identification document, therefore, undocumented Zimbabwean migrants opt for them. Long-distance buses that serve the South Africa-Zimbabwe route were found to be a popular channel of sending remittances - both cash and in-kind - to Zimbabwe. In-kind remittances have gained popularity due to the perennial lack of household consumer goods in Zimbabwe. Due to the national lockdown imposed in South Africa as a response to the Covid19 global pandemic, the study was unable to find the volume of remittances that is sent through the informal longdistance buses and trucks. The lockdown resulted in the closure of borders and non-essential travel was not permitted. The study found that the remittance transaction cost in the South AfricaZimbabwe corridor was higher than the global average cost of 6.84% (for formal channels) and the United Nations Sustainable Development Goal of 3% by the year 2030

The role of breast-feeding in infant immune system: a systems perspective on the intestinal microbiome

BACKGROUND: The human intestinal microbiota changes from being sparsely populated and variable to possessing a mature, adult-like stable microbiome during the first 2 years of life. This assembly process of the microbiota can lead to either negative or positive effects on health, depending on the colonization sequence and diet. An integrative study on the diet, the microbiota, and genomic activity at the transcriptomic level may give an insight into the role of diet in shaping the human/microbiome relationship. This study aims at better understanding the effects of microbial community and feeding mode (breast-fed and formula-fed) on the immune system, by comparing intestinal metagenomic and transcriptomic data from breast-fed and formula-fed babies.RESULTS: We re-analyzed a published metagenomics and host gene expression dataset from a systems biology perspective. Our results show that breast-fed samples co-express genes associated with immunological, metabolic, and biosynthetic activities. The diversity of the microbiota is higher in formula-fed than breast-fed infants, potentially reflecting the weaker dependence of infants on maternal microbiome. We mapped the microbial composition and the expression patterns for host systems and studied their relationship from a systems biology perspective, focusing on the differences.CONCLUSIONS: Our findings revealed that there is co-expression of more genes in breast-fed samples but lower microbial diversity compared to formula-fed. Applying network-based systems biology approach via enrichment of microbial species with host genes revealed the novel key relationships of the microbiota with immune and metabolic activity. This was supported statistically by data and literature