858 research outputs found
Pest management and food production: looking to the future
In their comprehensive paper, Montague Yudelman, Annu Ratta, and David Nygaard examine the key issues with regard to pest management and food production over the coming decades. They draw attention to the lack of adequate information on the magnitude and impact of pest losses; with out such information, policy makers are handicapped when devising strategies for meeting food needs. The authors address both chemical and nonchemical approaches to pest management, high lighting the importance of biotechnology. There is growing public sentiment against biotechnology but little appreciation as yet of its contributions to alleviating hunger by, among other things, controlling pest losses. The authors also adress the important subject of the roles of different actors in pest management, most notably the private sector. A world with out pests is unrealistic and probably undesirable. However, a world with severely reduced losses of food production to pests is achievable by 2020. This paper shows us how.Food crops Diseases and pests Control., Pests Integrated control.,
Waveplate retarders based on overhead transparencies
We describe procedures for constructing inexpensive waveplates of desired
retardation out of ordinary commercially available transparencies. Various
relevant properties of the transparencies are investigated: the dependence of
retardation on rotation of the film, tilt, wavelength, position, and
temperature. Constructing waveplates out of combinations of transparency sheets
is also explored.Comment: 7 pages, 12 fig
Remotely controlled industrial robotic arm and simulation of automated thermal furnace
The right execution of controllers ensures the correct analysis of information, generating efficient results and better optimizing the system. In this report, two controllers were designed. Firstly, a remotely controlled robotic arm, since there are no such type commercially available controllers. Moreover, robotic platforms are costly, so students and researchers are often unable to learn the concepts of programming industrial robots. This project makes a non-destructive, remotely-controlled robotic arm to better teach students and researchers about programming and control of robotic arms. Secondly, simulation of an automated thermal furnace for ArcelorMittal on SIMULINK, which is used for the annealing process of steel strip. The annealing process requires heating and cooling of the strip within a short duration to make metals more workable and to improve the ductility, resistance and hardness. The proposed simulation project for ArcelorMittal is used to virtually demonstrate the annealing process of a furnace
Digital Socialism Beyond the Digital Social: Confronting Communicative Capitalism with Ethics of Care
This paper analyses the role of the "social" in communicative capitalism. It shows how the digital social is situated in the context of ideology, exploitation, and alienation. Based on the ethics of care, the essay outlines foundations of an alternative concept and reality of the social in digital socialism. It borrows the key concept of "care" from feminist theory and ethics and uses it to explore alternative paths to rethink "digital socialism" in the age of social media ubiquity and the pervasiveness of communicative capitalism. We need imaginative efforts to think beyond "capitalist realism" as a "pervasive atmosphere" (Fisher 2009, 16) that impacts not just the economy and cultural production, but also the domain of the ideas to the extent that it seems "impossible even to imagine a coherent alternative to it" (Fisher 2009, 2)
Making Real-Time Drama: The Political Economy of Cultural Production in Syria’s Uprising
In CARGC Paper 2, Della Ratta explored how one 2013 Syrian television serial, Wilada min al-Khasira [Birth from the Waist] responded in real time to unfolding events of the Syrian revolution. She argued that the serial offers a living site for scholarly reflection on how cultural production and the power relations that shape it might shift, recombine, and adapt in the context of the three-year-old uprising turned into an armed conflict. Della Ratta mobilized the television serial to explore how the geopolitical relationships between Syrian and Gulf political elites had been dramatically reconfigured.https://repository.upenn.edu/cargc_papers/1001/thumbnail.jp
Análisis de armónicos variando en el tiempo en sistemas eléctricos de potencia con parques eólicos, a través de la teoría de la posibilidad
This paper focuses on the analysis of the connection of wind farms to the electric power system and their impact on the harmonic load-flow. A possibilistic harmonic load-flow methodology, previously developed by the authors, allows for modeling uncertainties related to linear and nonlinear load variations. On the other hand, it is well known that some types of wind turbines also produce harmonics, in fact, time-varying harmonics. The purpose of this paper is to present an improvement of the former method, in order to include the uncertainties due to the wind speed variations as an input related with power generated by the turbines. Simulations to test the proposal are performed in the IEEE 14-bus standard test system for harmonic analysis, but replacing the generator, at bus two, by a wind farm composed by ten FPC type wind turbines.En este trabajo se analiza el impacto de la conexión de parques eólicos, en el flujo de cargas armónicas en un sistema de potencia. Algunos generadores eólicos producen armónicos debido a la electrónica de potencia que utilizan para su vinculación con la red. Estos armónicos son variables en el tiempo ya que se relacionan con las variaciones en la velocidad del viento. El propósito de este trabajo es presentar una mejora a la metodología para el cálculo de incertidumbre en el flujo de cargas armónicas, a través de la teoría de la posibilidad, la cual fue previamente desarrollada por los autores. La mejora consiste en incluir la incertidumbre debida a las variaciones de la velocidad del viento. Para probar la metodología, se realizan simulaciones en el sistema de prueba de 14 barras de la IEEE, conectando en una de las barras un parque eólico compuesto por diez turbinas del tipo FPC. Los resultados obtenidos muestran que la incertidumbre en la velocidad del viento tiene un efecto considerable en las incertidumbres asociadas a las magnitudes de las tensiones armónicas calculadas.Fil: Romero Quete, Andrés Arturo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Energía Eléctrica. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Energía Eléctrica; ArgentinaFil: Suvire, Gaston Orlando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Energía Eléctrica. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Energía Eléctrica; ArgentinaFil: Zini, Humberto Cassiano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Energía Eléctrica. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Energía Eléctrica; ArgentinaFil: Ratta, Giuseppe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Energía Eléctrica. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Energía Eléctrica; Argentin
Architecture Differences between Cloud and Fog Computing in Internet of Things
Internet adopted the two technologies namely cloud and IOT. To make revolution in the current period Cloud computing gives hope to IOT. FOG computing is basically an extension of cloud computing services.
In this paper, we have introduced the topics I.e. cloud computing and FOG computing. After the introduction, we have discussed the architecture of IOT which includes both the three level architecture as well as the five level architecture. After the brief introduction of cloud computing, we have focused on the limitations of cloud computing that justifies why we shifted to the FOG computing which an extension to the cloud computing.
Before concluding the paper, we have highlighted a few challenges that we might have to face in FOG computing according to the references that we have included in our paper
Risk of Lactose Intolerance and Dairy Food Nutrition: A Review
Consumption of cow’s milk and milk products is associated with overall diet quality and adequacy of intake of many essential nutrients including calcium, potassium, phosphorus, protein, vitamins A, D (if fortified), and B12, riboflavin, and niacin. Unfortunately, some individuals may avoid milk and milk products unnecessarily because of adverse reactions to these foods. Because of its nutrient-rich package, consumption of dairy foods can play a unique role in helping to promote health. People who avoid milk and milk products due to lactose intolerance miss many benefits, as dairy and its nutrients are associated with: Improved nutrient intake and diet quality. Cow’s milk allergy is an immunologically mediated response to one or more of cow’s milk proteins. Lactose intolerance, a no immunological reaction, is the occurrence of symptoms after persons with low levels of the enzyme lactase (lactose maldigesters) consume lactose (milk sugar) in amounts exceeding lactase’s ability to digest it. Cow’s milk protein allergy occurs primarily in infancy and early childhood. Moreover, the condition tends to be outgrown by 5 years of age. In contrast to cow’s milk allergy, which occurs primarily in infancy and young childhood, lactose intolerance (symptoms) seldom occurs prior to preadolescence. Keywords: Milk, lactose intolerance, Milk protein allergy, paediatric populatio
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Knowledge Graph Construction From MusicXML: An Empirical Investigation With SPARQL Anything
Multimodal knowledge graphs are gaining momentum because of their ability to integrate multiple types of representations.
In particular, Musical Heritage Knowledge Graphs combine rich contextual information -- metadata from encyclopedic KGs, with symbolic content -- the scores encoded in a music ontology.
In this paper, we explore the application of SPARQL Anything -- a tool for façade-based knowledge graph construction (KGC) -- for integrating musical content encoded in MusicXML.
Specifically, we investigate the hypothesis that SPARQL is flexible enough to handle relevant tasks for musical knowledge graph construction such as (a) extracting melodic information, (b) extracting N-grams of musical information, (c) supporting the analysis of those N-grams and (d) populate a musical note ontology.
We contribute a collection of reusable queries for extracting musical features from MusicXML files to construct Musical Knowledge Graphs.
Crucially, we discuss friction points in using the façade-based approach (either in querying the façade or transforming the data) and provide recommendations on how to improve the usability of SPARQL for musical KGC tasks
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