1,063 research outputs found
Status assessment of the Critically Endangered Azores Bullfinch Pyrrhula murina
No full text'This work was part of the Azores Bullfinch monitoring programme included in the project LIFE NAT/P/000013 “Recovery of Azores Bullfinch’s habitat in the Special Protection Area of Pico da Vara / Ribeira do Guilherme”'The Azores Bullfinch is endemic to the island of São Miguel (Azores, Portugal). Its status was uplisted to Critically Endangered in 2005 on the basis of an extremely small and declining population that was considered to be restricted to a very small mountain range (43 km2), in a single location, within which the spread of invasive plants constituted a threat to habitat quality. Nevertheless, information was mostly inferred, or the product of, non-systematic studies. In order to carry out a complete assessment of the conservation status we analysed: (i) population trend, calculated from annual monitoring 1991–2008, (ii) population size, and (iii) range size, obtaining estimates in a single morning study in 2008 involving the simultaneous participation of 48 observers. Contrary to previous inferences, the population is no longer decreasing, although quality of laurel forest habitat continues to decline due to the persistent threat of invasive species. Population size (mean ± SE) was estimated at 1,064 ± 304 individuals using distance sampling methods, although the estimate was very sensitive to the survey method used. Range size estimates (extent of occurrence and area of occupancy) were 144 km2 and 83 km2 respectively. Given the present information, we propose the downlisting of Azores Bullfinch to Endangered on the IUCN Red List.Peer reviewe
Linguaggio, simbolo, memoria. Pico e l’ircocervo
No full textThis article examines the role of language, symbols, and memory in the thought of Giovanni Pico della Mirandola, focusing on a particular passage in his Apologia where he mentions the "hircocervus". The author explores the meaning of this symbol, linking it to medieval philosophical debates on intelligibility and truth, as well as to the Kabbalistic tradition. By analyzing Pico’s sources a connection emerges between the "hircocervus" and Flavius Mithridates’ translation of the Song of Songs, highlighting the complex interplay between philosophy, Kabbalah, and the art of memory in Renaissance thought. At the same time, this symbol provides a crucial clue for investigating Pico’s mnemonic structures
Diacronismo y dinámica de la cerámica Nasca del valle de Yauca del Rosario: el caso de Cerro Pico
No full textLa ejecución del Proyecto Arqueológico Geoglifos de Ica, centra parte de su investigación, en el área de Cerro Pico, un importante Paisaje Arqueológico del valle de Yauca, asociado a material depositado en sus inmediaciones. Si bien, los geoglifos de Cerro Pico mantienen una cronología más ligada a sociedades como Paracas y un periodo transicional, el material hallado en superficie, brinda un panorama de constancia y diversidad, evidenciado a través de la identificación de estilos transicionales como Ocucaje 10, Tajo, Topará y Nasca inicial; asimismo, fragmentos correspondientes a estilos Nasca, Wari, Ica y colonial. En este sentido, la presente investigación, analiza y discute la constante presencia de cerámica Nasca y su relación con el sujeto de estudio, los posibles factores que pudieron propiciar su continua deposición, debido a que la fragmentería cerámica, presente, se ha convertido en un gran indicador de las sociedades que tomaron a Cerro Pico como un centro de peregrinación, en el cual, pudieron desarrollarse actividades rituales; esto evidenciado a través de formas e iconografía pictórica representativa de sus fases temprana, media y tardía, con características solemnes.
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The execution of the Ica Geoglyphs Archaeological Project focuses part of its research in the Cerro Pico area, an important Archaeological Landscape of the Yauca Valley, associated with material deposited in its mediations. Although the Cerro Pico geoglyphs maintain a chronology more linked to societies such as Paracas and a transitional period, the material found on the surface provides a panorama of constancy and diversity, evidenced through the identification of transitional styles such as Ocucaje 10, Tajo, Topará and initial Nasca; as, fragments corresponding to Nasca, Wari, Ica and Colonial styles. In this sense, the present investigation analyzes and discusses the constant presence of Nasca ceramics and its relationship with the subject of study, the possible factors that may favor its continuous deposition, due to the fact that the ceramic fragmentery, present, has become a great indicator of the societies that took Cerro Pico as a pilgrimage center, in which ritual activities can be developed; this evidenced through forms and representative pictorial iconography of its early, middle and late phases, with solemn characteristics
A Pico-Satellite Design to Demonstrate Trajectory and Science Applications
No full textThis paper presents the design, integration and testing of a pico satellite, Delfi-PQ, a 3P PocketQube developed by Delft University of Technology, expected to be launched at the end of 2020. The main goal of this project is creating a miniaturized platform for future space missions with performances comparable to CubeSats, taking advantage of the miniaturization of electronic components and their integration. Education of aerospace engineering students is a second key goal of the project, where students involved in the project as part of their curricular activities.Space Systems EgineeringSpace Engineerin
Rotatable phononic crystal with multiresonant scatterers for acoustica switching applications
No full textThis study presents an acoustic switch based on a sonic crystal (SC) with multiresonant scatterers arranged in a square 2D lattice. The scatterers feature Helmholtz res-
onators (HRs) tuned to different frequencies. A 90° rotation of all scatterers enables switching the interaction between Bragg bandgaps (Bragg- BGs) and Helmholtz res-
onator (HR) bandgaps, creating selective frequency filtering and wave propagation control. The research targets low to mid frequencies (500-2500 Hz), an underexplored
range in current studies. The structure, made via costeffective 3D printing without infill to reduce absorption, is both simple and practical. Tests in an anechoic chamber
reveal a notable 20 dB contrast in acoustic insulation. This design offers potential applications in noise reduction for urban and industrial settings, adaptive acoustic systems,
sensors, and acoustic energy harvesting
Indoor wireless communications, using an M-QAM Pico cellular system with diversity, error correction coding and perfect interleaving
No full textIndoor radio environment is characterised by a Rician faded channel. The cellular structure for indoor wireless communications is designed using small cells of diameter 10 m - 100 m, commonly known as pico cells. This report first evaluates the probability of co-channel interference of a pico-cellular system and compares the obtained results with the interference probability of macro and micro cellular systems. Next the bit error probability is calculated for a M-QAM pico cellular system with coherent detection, where M is chosen high in order to obtain an additional increase of the spectrum efficiency. The drawback of a high value of M will be reduced by applying diversity techniques and/or error correcting codes. For the calculation of the system performance with error correcting coding perfect interleaving is assumed and a theoretical value for the minimum interleave distance is derived.Electrical Engineering, Mathematics and Computer ScienceTelecommunicatie- en Verkeersbegeleidingssysteme
Development of pico-satellite - onboard computer subsystem
No full textThis report gives an insight of the development of the Student Pico-Satellite Project, with main focus on the development of the Onboard Computer (OBC) Subsystem. The Pico-satellite used in this project is a product of Pumpkin Incorporated, the CubeSat Kit, and the microprocessor used in the Onboard Computer Subsystem is the Silicon Laboratories 8051 microcontroller, C8051F120. The objective of this project is to design the Overall Flight Operating Modes of the Onboard Computer Subsystem and develop a test software program for the Onboard Computer to illustrate the design.
As the Onboard Computer Subsystem is responsible for the Command and Data Handling of the Pico-Satellite and the other subsystems, the design of the Overall Flight Operating Modes reflects the basic operations of the Pico-Satellite. From launch mode to the safe-hold modes of the Pico-Satellite, these modes describe the various predetermined states of the Pico-Satellite throughout the course of its mission flight. Moreover, the success to the Pico-Satellite’s mission is dependent on the design of the safe-hold modes which ensures a failsafe operating system. These operating modes will form the basic blocks of the Onboard Computer Subsystem’s operating software.
The illustration of the Overall Flight Operating Modes is demonstrated through a simulation program, developed with the Keil micro Vision Integrated Development Environment (IDE) and the SALVO’s Real Time Operating System (RTOS), which performs the switching of the operating modes. Executed in real time scenario, the event-driven RTOS allows the OBC to handle multiple events with the multi-tasking capability while fully utilizing the limited resources available. This software program is then downloaded onto the hardware to demonstrate the processing capability of the Onboard Computer.
Lastly, this report also highlights the challenges and problems encountered by the author in the course of the project and the steps taken to overcome those issues.Bachelor of Engineerin
Beyond PICO: The SPIDER tool for qualitative evidence synthesis
No full textStandardized systematic search strategies facilitate rigor in research. Current search tools focus on retrieval of quantitative research. In this article we address issues relating to using existing search strategy tools, most typically the PICO (Population, Intervention, Comparison, Outcome) formulation for defining key elements of a review question, when searching for qualitative and mixed methods research studies. An alternative search strategy tool for qualitative/mixed methods research is outlined: SPIDER (Sample, Phenomenon of Interest, Design, Evaluation, Research type). We used both the SPIDER and PICO search strategy tools with a qualitative research question. We have used the SPIDER tool to advance thinking beyond PICO in its suitable application to qualitative and mixed methods research. However, we have highlighted once more the need for improved indexing of qualitative articles in databases. To constitute a viable alternative to PICO, SPIDER needs to be refined and tested on a wider range of topics. © The Author(s) 2012
On Pico della Mirandola's Notion of Philosophy
No full textFil: Magnavacca, Silvia. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Centro de Estudios de Filosofía Medieval; Argentina.Luego de repasar los rasgos más importantes de la noción de “filosofía” en la tradición platónica y aristotélica, se trata de situar el pensamiento de Pico della Mirandola en relación con estas dos líneas principales, señalando a continuación el lugar que asigna a la filosofía –como etapa preliminar a la teología y la religión– en la ascensión platónica del alma. Entonces se demuestra que el concepto piquense de “filosofía” pertenece a la tradición platónica clásica, a diferencia de lo que sucede antes con los autores de la escolástica. Finalmente, se presenta una interpretación personal de la autora respecto al uso de este concepto tradicional como respuesta de Pico della Mirandola a los problemas de su tiempo.After reviewing the most important features of the notion of “philosophy” in the Platonic and Aristotelian tradition, the aim is to situate Pico della Mirandola’s thought in relation to these two main lines. Then to point out the place he assigns to philosophy –as a preliminary stage to theology and religion– in the Platonic ascension of the soul. It is then shown that Pico’s concept of “philosophy” belongs to the classical Platonic tradition, unlike what happened before with the authors of the Scholastics. Finally, the author presents a personal interpretation of the use of this traditional concept as Pico della Mirandola’s response to the problems of his time
Fede, immaginazione e scetticismo in Gianfrancesco Pico della Mirandola
No full text2009 - 2010The Ph. D. dissertation proposes a hypothesis for interpreting the philosophical works of Gianfrancesco Pico della Mirandola, in order to determine patterns and conceptual issues relevant to account for the continuity or discontinuity between Pico's different writings, and then in order to establish the 'role' of these speculative works in the history of Renaissance philosophy. .. [edited by Author]La tesi prende le mosse dal tentativo di proporre un'ipotesi di interpretazione dell'opera di Giangrancesco Pico della Mirandola; in particolare dall'intenzione di verificare se al fondo di una produzione vasta, eterogenea per contenuti e generali letterari sperimentati, come quella di Pico, si possono individuare motivi e nodi concettuali utili a rendere conto della continuità, o della discontinuità (quando si rileva) tra i diversi scritti; e quindi, in ultima analisi, tali da permettere di affrontare con maggiore consapevolezza la domanda sullo statuto di quest'opera nella storia della filosofia del Rinascimento. .. [a cura dell'Autore]IX n.s
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