1,721,258 research outputs found
Corpi estranei esofagei nel cane: dalla diagnosi alla terapia (prima parte). Esophageal foreign bodies in the dog: from diagnosis to therapy (first part)
No full textWebRISC-V: A 32/64-bit RISC-V pipeline simulation tool
Full text linkWebRISC-V is a web-based education-oriented tool, which permits the investigation of the pipelined execution of assembly programs according to the RV32IM and RV64IM specifications (32-bit or 64-bit RISC-V processor). The tool permits to evaluate and understand slow-downs in the execution due to pipeline stalls and further investigate the internal state of the pipeline architectural blocks (e.g., registers, memory, multiplexers, ALU). The pipeline concept is illustrated in the vast majority of university courses in Computer Architecture, since it is the well established standard for implementing high-performance processors. However, the impact of pipelined execution is often underestimated or even unknown, whilst it represents a very important source for the speed-up of programs. Several similar tools exist and are publicly available, but WebRISC-V is currently the first one that can be executed directly in a web-browser while displaying the cycle-by-cycle detailed pipeline execution for a RISC-V processor. This paper describes WebRISC-V, compares it against other similar available tools and presents its features. An example of usage for investigating the pipeline with the support of an automatically generated pipeline diagram is provided
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Old maps and the watercolor illusion: cartography, vision science and figure-ground segregation principles
No full textVariations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Synthesis of alpha- and beta-glycosyl asparagine ethylene isosteres (C-glycosyl asparagines) via sugar acetylenes and Garner aldehyde coupling
No full textA convergent approach has been developed for the synthesis of C-glycosyl amino acids in which the glycinyl moiety CH(NH2)CO2H is connected to the anomeric center of the sugar residue by a three carbon atom tether. Essentially, these compounds are isosteres of N-glycosyl asparagines in which the amide group has been replaced by an ethylene bridge. Following the coupling of α- or β-D-linked lithium C-glycoside acetylides with N-Boc D-serinal acetonide (Garner aldehyde), the resulting adducts were transformed into the final N-Boc-C-glycosyl-α-aminopentanoic acids via reduction of the triple bond, deoxygenation, and oxidative cleavage of the oxazolidine ring. By this protocol, 12 C-glycosyl asparagines, six pairs of α- and β-anomers, have been prepared incorporating the gluco, galacto, manno, and the corresponding 2-acetamido-2-deoxy residues
Normal faulting vs regional subsidence and sedimentation rate
No full textNormal faults occur in a variety of geodynamic environments, both in subsiding and uplifting areas. Normal faults may have slip rates faster or slower than regional subsidence or uplift rates. The total subsidence may be defined as the sum of the hangingwall subsidence generated by the normal fault and the regional subsidence or uplift rate. Positive total subsidence obviously increases the accommodation space (e.g. passive margins and back-arc basins), in contrast with negative total subsidence (e.g. orogens). Where the hangingwall subsidence rate is faster than the sedimentation rate in case of both positive and negative total subsidence, the facies and thickness of the syntectonic stratigraphic package may vary from the hangingwall to the footwall. A hangingwall subsidence rate slower than sedimentation rate only results in a larger thickness of the strata growing in the hangingwall, with no facies changes and no morphological step at the surface. The isostatic footwall uplift is also proportional to the amount and density of the sediments filling the half-graben and therefore it should be more significant when the hangingwall subsidence rate is higher than sedimentation rate
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