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

Copula based dependent censoring in cure models

In this paper we consider a time-to-event variable $T$ that is subject to random right censoring, and we assume that the censoring time $C$ is stochastically dependent on $T$ and that there is a positive probability of not observing the event. There are various situations in practice where this happens, and appropriate models and methods need to be considered to avoid biased estimators of the survival function or incorrect conclusions in clinical trials. We consider a fully parametric model for the bivariate distribution of $(T,C)$, that takes these features into account. The model depends on a parametric copula (with unknown association parameter) and on parametric marginal distributions for $T$ and $C$. Sufficient conditions are developed under which the model is identified, and an estimation procedure is proposed. In particular, our model allows to identify and estimate the association between $T$ and $C$, even though only the smallest of these variables is observable. The finite sample performance of the estimated parameters is illustrated by means of a thorough simulation study and the analysis of breast cancer data.Comment: 22 pages, 1 figur

Determining the Influence of Dietary Roughage Concentration and Source on Rumen Parameters related to Sulfur Toxicity

Producers are looking for a way to prevent the negative effects associated with feeding large amounts of ethanol co-products that are high in sulfur (S). High levels of S in the diet result in increased ruminal concentrations of hydrogen sulfide (H2S). Elevated levels of ruminal H2S have been correlated to increased incidences of the neurological disorder polioencephalomalcia. The results of these studies suggest that when balanced for NDF levels, chopped cornstalks and chopped bromegrass grass hay did not differ in their effects on rumen H2S concentrations and ruminal pH, and that increasing inclusion of roughage resulted in increased ruminal pH and decreased ruminal H2S. Although increasing roughage levels in the diet results in reduced energy density of the diet, steers in this study increased intake to compensate and thus gains were not affected. Increasing hay inclusion in the diet from 5% to 12% (DM basis) decreased H2S concentrations by approximately 2,000 ppm, and thus appears to be a practical way to increase inclusion of high S ingredients such as ethanol co-products while reducing the risk of S toxicity