1,359 research outputs found
Band-Edge Energetics Control for Solar Hydrogen Production
No full textThe global transition from fossil-based resources to renewable energy is critically important to address the sharply increasing threat of global climate change and to ensure long-term energy security. One attractive candidate to substitute for conventional fossil fuels is hydrogen. Hydrogen is an excellent energy carrier that can be directly converted into electricity via fuel cells, or be combined with carbon dioxide (CO2) or carbon monoxide (CO) to form high energy density synthetic fuels. Most of the current industrial methods for hydrogen production, however, is by steam reforming of natural gas, which releases CO2 as a by-product, making it environmentally unsustainable. Photoelectrochemical (PEC) water splitting, on the other hand, is a carbon-neutral approach that enables the conversion and storage of the abundant solar energy into hydrogen using only renewable and clean resources. This process uses semiconductors to capture and convert sunlight into photogenerated charge carriers (i.e., electrons and holes), and electrocatalysts to facilitate the multi-charge transfer process for the oxidation and reduction of water to oxygen and hydrogen, respectively.ChemE/Materials for Energy Conversion and Storag
Optical enhancement for heterojunction silicon solar cells
No full textPhotovoltaic Materials and DevicesElectrical Sustainable EnergyElectrical Engineering, Mathematics and Computer Scienc
I.A. e responsabilità civile. Robot, autoveicoli e obblighi di protezione
No full textIl contributo mette in evidenza le diverse posizioni sull’intricato rapporto tra responsabilità civile e I.A. L’autore rileva le molteplici sfumature del fenomeno della robotica con particolare riferimento agli incidenti causati dai veicoli a guida autonoma. Vengono rilette in chiave critica le normative di matrice europea e proposte alcune soluzioni, sia sui modelli della responsabilità aquiliana che contrattuale, al fine di garantire un equilibrio tra innovazione tecnologica e diritti fondamentali.
The contribution highlights the different positions on the intricate relationship between civil liability and I.A. The author notes the many nuances of the robotics phenomenon with particular reference to accidents caused by self-driving vehicles. European regulations are reinterpreted in a critical key and some solutions are proposed, both on the models of aquilian and contractual responsibility, in order to guarantee a balance between technological innovation and fundamental rights
Development and optimisation of a duplex real-time reverse transcription quantitative PCR assay targeting the VP7 and NS2 genes of African horse sickness virus
No full textNucleotide sequences of 52 South African isolates of African horse sickness virus (AHSV) collected during 2004–2005 and including viruses of all nine AHSV serotypes, were used to design and develop a duplex real-time reverse transcription quantitative PCR (RT-PCR) assay targeting the VP7 (S8) and NS2 (S9) genes of AHSV. The assay was optimized for detection of AHSV in fresh and frozen blood of naturally infected horses. Assay performance was enhanced using random hexamers rather than gene-specific primers for RT, and with denaturation of double-stranded RNA in the presence of random hexamers. The assay was efficient with a linear range of at least five orders of magnitude. The analytical sensitivity of the assay was 132 copies of the target genes (4125 copies per ml of blood), and the assay was at least 10-fold more sensitive than virus isolation on BHK-21 cells. The assay was also highly specific because it did not detect related orbiviruses, such as bluetongue and equine encephalosis viruses.ID: S0166093410000893; M3: Article; Accession Number: S0166093410000893; Author: M. Quan (a, b, ⁎); Author: C.W. Lourens (a, b); Author: N.J. MacLachlan (c); Author: I.A. Gardner (d); Author: A.J. Guthrie (a); Affiliation: Equine Research Centre, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort 0110, South Africa; Affiliation: Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort 0110, South Africa; Affiliation: Equine Viral Disease Laboratory, Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California, Davis, CA 95616, USA; Affiliation: Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, CA 95616, USA; Keyword: African horse sickness virus; Keyword: Real-time quantitative RT-PCR; Keyword: VP7 gene; Keyword: NS2 gene; Keyword: Duplex; Number of Pages: 8; Language: English
Basni: I.A. Krylova, With a Biography of the Author
No full textThe complete text of the fables is followed by a list after 298 of the fables arranged by the years in which they were written (1806-36) and then an alphabetical index. The volume is in fair to poor condition. The cover (cardboard boards) is worn and the spine damaged. There are about thirty-five good illustrations, signed by Panov and Braun or something very close to that, presumably the engraver. I do not have many illustrated editions of Krylov. Among the best of the illustrations here are The Monkey and the Spectacles (26), FK (37), Monkey (83), The Lion A-Hunting (133), The Knight (155), Lion and Wolf (158), Wolf and Shepherds (178), Ass and Rustic (190), Lambkin (210), and Squirrel (253). The set of texts seems to fit perfectly with Pares' standard edition. There is a Russian bookseller's label on the inside front cover.This is a hardbound book (hard cover)Language note: Russian18th complete editionUnder the editorship of V. Kenevic
Electrochemical carbon dioxide capture to close the carbon cycle
No full textElectrochemical CO2 capture technologies are gaining attention due to their flexibility, their ability to address decentralized emissions (e.g., ocean and atmosphere) and their fit in an electrified industry. In the present work, recent progress made in electrochemical CO2 capture is reviewed. The majority of these methods rely on the concept of “pH-swing” and the effect it has on the CO2 hydration/dehydration equilibrium. Through a pH-swing, CO2 can be captured and recovered by shifting the pH of a working fluid between acidic and basic pH. Such swing can be applied electrochemically through electrolysis, bipolar membrane electrodialysis, reversible redox reactions and capacitive deionization. In this review, we summarize main parameters governing these electrochemical pH-swing processes and put the concept in the framework of available worldwide capture technologies. We analyse the energy efficiency and consumption of such systems, and provide recommendations for further improvements. Although electrochemical CO2 capture technologies are rather costly compared to the amine based capture, they can be particularly interesting if more affordable renewable electricity and materials (e.g., electrode and membranes) become widely available. Furthermore, electrochemical methods have the ability to (directly) convert the captured CO2 to value added chemicals and fuels, and hence prepare for a fully electrified circular carbon economy.ChemE/Transport Phenomen
The topic of the Coming God in poetry by I.A. Bunin and S.S. Bekhteev
No full textThe article in the cultural and philosophical, historical and literary context examines the theme of “coming God” that has in post-revolutionary poetry by I.A. Bunin and S. Behteev special spiritual and moral significance. Identified by the author of the article the mythopoetic constants (motifs, figurative plot, universals, ideologies) organize artistic and ontological space of the Russian literature in the early XXth century, the representativeness of the work of the two brightest representatives of “spiritual realism”. Poetic micro- and macrocosm of I.A. Bunin and S. Behteev – artists, rooted in the same physical (Orel-Elets, and even Paris) and metaphysical (ChristianOrthodox) “soil” is inextricably linked to the ontology and axiology of the New Testament. Through the prism of biblical images the poems of I.A. Bunin and S. Behteev often disclose crucified Motherland, tormented by pangs of godparents, the redeeming blood and sins of the people. It is no coincidence that I.A. Bunin and S. Behteev’s poetry reflects the image of “the coming God” as the embodiment of the moral and ethical of the Absolute with which people can existence. The epithet “future” rather multi-valued and extremely myth suggestive, at the same time points to the “walking” on the crucifixion of Christ the Savior, and “future” court, which is relied on by lyrical characters in poems by I.A. Bunin and S. Behteev, thirsting in exile in a foreign land moral support and reliable spiritual guide. Such guide for many Russian emigrants was “Coming God”, who was inevitably to win “Coming Ham (son of Noah)”
I.A. Bunin and S.N. Durylin: problems of creative dialogue
No full textThe article is devoted to the consideration of the creative connections of I.A. Bunin and S.N. Durylin (1887-1954). In modern literary criticism, the question of studying the creative connections of S.N. Durylin and I.A. Bunin is urgent, which was not touched upon by the researchers. Although Durylin does not belong to the writers of emigration, in Russia he almost immediately finds himself in internal emigration: art works and scientific works were not published. This brought him closer to Bunin’s position. First of all, Durylin is interested in Bunin’s story “The Village”, in which the “Russian question” is touched. But, if in the story “Village” the writer does not fully accept the Bunin idea of Russia as a country of the wild and primeval, then in the “Life of Arseniev” the model of Russian life recreated by the author finds a response in Durylin’s creative consciousness. In the memoir book “In his corner” the author recreates the immanent image of Bunin’s native land. Brings together the writers of the perception of the revolution of 1917 as a “breakdown”, a catastrophe, a lyric narrative, a structureforming function of memory. However, if Bunin’s pre-revolutionary pictures of Russian life are the center of the narrative, then Durylin serves as a background (and a window into an ideal past), the focus of writers’ attention is the post-revolutionary process of the death of the healthy beginnings of Russian life, embodied in the form of snow
Explicit algebraic and differential Reynolds stress model application to homogeneously sheared and compressed turbulence
No full textAn explicit algebraic and differential Reynolds stress models (EARSM and DRSM) are used to investigate the influence of homogeneous shear and compression on the behaviour of turbulence in the limit of rapid distortion theory (RDT). EARSM is shown to give realizable results and to preserve RDT regime, unlike the eddy-viscosity model (EVM). The DRSM version of our model is in reasonable agreement with RDT theory
ANTHROPODICY BY I.A. ILYIN
No full textThe object of the research is the socio-philosophical discussions of Russian philosophers of the turn of the XIX-XX centuries, the subject of our research is the anthropodicy of I.A. Ilyin. The author examines the categories of good, good and evil, the meaning of life, asceticism in the context of the concept of active resistance to evil and the teachings about the heart of I. Ilyin. These concepts were considered as a reflection of reality, as the foundation for building a state and society. Ilyin cites three qualities necessary for an active struggle against evil: spiritual character, willpower and a living conscience. According to the presence of these qualities, Ilyin accordingly divides people into three categories. Only a strong and conscientious person is able to fulfill “God’s work” on earth. The author of the article comes to the conclusion that I. Ilyin’s concept of the imposition of will on the internal or external composition of a person contains axiological and didactic potential. Russian Russian philosophical thought at the beginning of the 20th century came to realize the Russian idea, that is, to comprehend the self-existence of the Russian, Russian people. Ilyin’s ontology and axiology, despite negative criticism, enriched Russian philosophical thought, his ethical views allowed us to approach the understanding of the philosophical awareness of the meaning of human existence and set the vector of development of society and the state. Concepts and. Ilyina in our time, serious external existential challenges for Russia look more relevant than ever and require a comprehensive study. For the first time it was revealed that the teachings of I. Ilyin trace the intentions of asceticism characteristic of Russian spiritual culture. The practical value of the work is determined by the fact that the results of the research can be used in the development of courses “Philosophy”, “History of Philosophy”, “Ethics”, “Cultural Studies”, “Fundamentals of Russian statehood”
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