Lord of My Soul: The Letters of Catalina Micaela, Duchess of Savoy, to Her Husbanb, Carlo Emanuele I

This essay, part of a book-length project on the Infanta Catalina Micaela, Duchess of Savoy, examines Catalina’s relationship with her husband and her reaction to assuming political control in the fall of 1588 during Carlo\u27s first major absence from Turin after their marriage

Using acoustic travel time to monitor the heat variability of glacial Fjords

Author Posting. © American Meteorological Society, 2021. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of the Atmospheric and Oceanic Technology 38(9), (2021): 1535–1550, https://doi.org/10.1175/JTECH-D-20-0176.s1.Monitoring the heat content variability of glacial fjords is crucial to understanding the effects of oceanic forcing on marine-terminating glaciers. A pressure-sensor-equipped inverted echo sounder (PIES) was deployed midfjord in Sermilik Fjord in southeast Greenland from August 2011 to September 2012 alongside a moored array of instruments recording temperature, conductivity, and velocity. Historical hydrography is used to quantify the relationship between acoustic travel time and the vertically averaged heat content, and a new method is developed for filtering acoustic return echoes in an ice-influenced environment. We show that PIES measurements, combined with a knowledge of the fjord’s two-layer density structure, can be used to reconstruct the thickness and temperature of the inflowing water. Additionally, we find that fjord–shelf exchange events are identifiable in the travel time record implying the PIES can be used to monitor fjord circulation. Finally, we show that PIES data can be combined with moored temperature records to derive the heat content of the upper layer of the fjord where moored instruments are at great risk of being damaged by transiting icebergs.FS and MA acknowledge funding from the Kerr Family Foundation and the Grossman Family Foundation through the Woods Hole Oceanographic Institution. MA is supported by a grant from the National Science Foundation Office of Polar Programs (1332911). FS and RS acknowledge support from NSF OCE-1657601 and from the Heising-Simons Foundation

Software-Defined Radio Demonstrators: An Example and Future Trends

Software-defined radio requires the combination of software-based signal processing and the enabling hardware components. In this paper, we present an overview of the criteria for such platforms and the current state of development and future trends in this area. This paper will also provide details of a high-performance flexible radio platform called the maynooth adaptable radio system (MARS) that was developed to explore the use of software-defined radio concepts in the provision of infrastructure elements in a telecommunications application, such as mobile phone basestations or multimedia broadcasters

“Lessons learnt in developing a SDR Platform with USB interface”

Building a new Software Defined Radio (SDR) system requires multidisciplinary research covering the engineering disciplines of communication systems, radio frequency, digital and analog hardware, software and digital signal processing. This paper focuses on the efforts at the low-level software development, such as device drivers, embedded source code at firmware-space and Application- Programming Interfaces (APIs) at user-space. In the early stages of constructing a SDR platform, design decisions are made regarding the interface between the SDR hardware and the PC. These decisions are of great importance and will determine the complexity of the low-level software development, its interoperability with third-party tools for waveform development and its efficiency in terms of bandwidth and configurability. This position paper reviews the experiences in using a USB interface between the PC and the SDR platform and the corresponding impact in the software development stage

Reconfigurable Radio Hardware & Software Integration and Testing

Software Defined Radio efforts are focused in both software and hardware areas. Nowadays software products are designed to allow newer and better software radio products for a quick reconfiguration and adaptation to new challenges. With the proliferation of reconfigurable radio software, having a complete SDR system has never been as approachable/accessible. This paper focused on the integration and testing efforts of a RF front-end with the existing reconfigurable radio software called IRIS [1] (Implementing Radio in Software) developed by CTVR (Centre for Telecommunications Value-Chain Research). Several papers were presented at SDR’07 Forum in Denver (CO) [2][3] regarding this RF front-end and its lowlevel software elements. The RF front-end consists of four hardware elements, namely a radio transmitter, a radio receiver, a baseband interface and a PC to perform signal processing and configuration. Additionally, there is a substantial software element to configure the hardware and to receive/transmit data via a USB 2.0 interface. The IRIS system is a component framework for building radio systems, which integrates a great variety of signal processing components. In order to integrate our RF front-end with IRIS two new IRIS components were written in C++: one for transmitting and another for receiving. This integration was possible thanks to the high quality of both software elements: IRIS and the RF front-end software elements (USB driver, embedded code and additional API libraries). High quality measured in terms of reusable, maintainable, modifiable and extendible. The full paper version will include a demonstration of the complete SDR system: IRIS and RF front-end working together. This demonstration consists of building two radios in IRIS, one for transmission and another for reception of an image file using DBPSK modulation. This radio makes use of the two new IRIS components that communicate with our RF front-end. Integrations with other software systems for building radios are planned for the near future, such as OSSIE system by Virginia Tech. All this work will lead us to a better understanding about these systems, which will help us to face the challenge of building an improved one

Software Defined Radio Transceiver Implementation

This document presents the design and implementation of a low cost reconfigurable radio transceiver platform. The platform will be used as a research tool in the investigation of software defined radio techniques. The hardware presented is an evolution of work presented at the 2006 RIA colloquium. The platform consists of four hardware elements, namely a radio transmitter, a radio receiver, a baseband interface and a PC to perform signal processing and configuration. Data and control communication is performed via a USB 2.0 interface between the transceiver and a laptop PC. The platform development included a substantial software element to configure the hardware and to receive and transmit data between the PC and the transceiver. The technical choices, design and realization of the prototype are discussed

Fortalezas y debilidades de la incipiente industrialización de productos frutícolas en el partido de General Pueyrredón (Argentina) como estrategia de desarrollo local

En el Cinturón Hortícola de Partido de General Pueyrredón, ubicado al oeste del casco urbano de la ciudad de Mar del Plata, se desarrollan incipientemente actividades relacionadas con la industrialización de productos frutihortícolas. Esta iniciativa surge a partir de una crisis de sobreproducción en fresco en el sector, sin generar una radical solución a tal situación, porque los volúmenes de la demanda de productos procesados en el área urbana local aún son reducidos y es escasa la exportación de productos congelados frutihortícolas. Sin embargo, la vida moderna induce a nuevos estilos de consumo a consumidores vinculados con niveles de ingreso medio y/o medio alto, que se caracterizan por mantener una dieta “sana”, i ncorporando a su di et a p roductos frescos de frutas y hortalizas en reemplazo total o parcialmente las carnes rojas. Sumado a ello se debe considerar el fenómeno de la incor poración de la mujer al mercado laboral, entre otros, situaciones como las mencionadas, incitan a un grupo de individuos a incursionar y continuar en el procesamiento de productos frescos, porque avizoran un futuro promisorio. Desde el ámbito de los organismos oficiales existe una importante inquietud en alentar a agentes interesados en iniciarse y/o expandirse en el procesado frutihortícola asesorando, sugiriendo la concreción de agrupaciones y realizando apoyos de tipo logístico, excluyendo aquellas debilidades que puedan existir en el sector y alentando a su fortalecimiento

Agentes productivos y producciones no tradicionales en el municipio de Gral. Puyrredon (Argentina)

A partir de la década del ’90, se observa en el Cinturón Frutihortícola del Partido de General Pueyrredon (Argentina), cómo un pequeño grupo de productores orientan su producción hacia las Producciones no Tradicionales (PNT), como los kiwis, berries y cherries. A excepción de los champiñones, su producción comenzó en los años ’70. Con la finalidad de comprender tal mutación productiva y el estado de la cuestión, se comenzó por realizar un rastreo en diferentes medios, ello se complementó con encuestas a los agentes involucrados, y a diferentes organismos públicos y privados. Posteriormente se analizaron los factores que inducen a los agentes productivos locales, a la obtención de materias primas no tradicionales con el propósito de relacionar el alcance de la distribución comercial que poseen las producciones no tradicionales y los aportes técnicos, sociales y económicos que éstas pueden realizar e incitar a agentes y actores a emprender actividades afines orientadas al desarrollo local

Software engine development for SDR

This paper focuses on the development of the software engine for an SDR hardware platform [1][2]. This SDR hardware system operates across the frequency band from 1.6GHz to 2.5GHz with the capability to support the GSM1800, PCS 1900, UMTS-FDD, UMTS-TDD and 802.11b standards. It consists of TX/RX RF front-ends, data converters and the USB 2.0 PHY interface