25 research outputs found
SummHelper: Collaborative Human-Computer Summarization
Current approaches for text summarization are predominantly automatic, with
rather limited space for human intervention and control over the process. In
this paper, we introduce SummHelper, a 2-phase summarization assistant designed
to foster human-machine collaboration. The initial phase involves content
selection, where the system recommends potential content, allowing users to
accept, modify, or introduce additional selections. The subsequent phase,
content consolidation, involves SummHelper generating a coherent summary from
these selections, which users can then refine using visual mappings between the
summary and the source text. Small-scale user studies reveal the effectiveness
of our application, with participants being especially appreciative of the
balance between automated guidance and opportunities for personal input.Comment: Demo pape
Spectral and spatial shaping of Smith Purcell Radiation
The Smith Purcell effect, observed when an electron beam passes in the
vicinity of a periodic structure, is a promising platform for the generation of
electromagnetic radiation in previously-unreachable spectral ranges. However,
most of the studies of this radiation were performed on simple periodic
gratings, whose radiation spectrum exhibits a single peak and its higher
harmonics predicted by a well-established dispersion relation. Here, we propose
a method to shape the spatial and spectral far-field distribution of the
radiation using complex periodic and aperiodic gratings. We show, theoretically
and experimentally, that engineering multiple peak spectra with controlled
widths located at desired wavelengths is achievable using Smith-Purcell
radiation. Our method opens the way to free-electron driven sources with
tailored angular and spectral response, and gives rise to focusing
functionality for spectral ranges where lenses are unavailable or inefficient
Effect of Levan Supplement in Orange Juice on Weight, Gastrointestinal Symptoms and Metabolic Profile of Healthy Subjects: Results of an 8-Week Clinical Trial
Levan is a commonly used dietary fiber of the fructans group. Its impact on health remains undetermined. This double blind controlled study aimed to investigate the effect of 8 weeks’ daily consumption of 500 mL of natural orange juice enriched with 11.25 g of levan compared to the same amount of natural orange juice without levan on weight, gastrointestinal symptoms and metabolic profiles of 48 healthy volunteers. The statistical analyses compared between- and within-group findings at baseline, 4 weeks and study closure. The compared parameters were: weight, blood pressure, blood laboratory tests, daily number of defecations, scores of stool consistency, abdominal pain, bloating, gas, dyspepsia, vomiting and heartburn. Despite a higher fiber level recorded in the study group, there was no significant difference in the effect of the two kinds of juices on the studied parameters. Both juices decreased systolic and diastolic pressures, increased sodium level (within normal range), stool number, and bloating scores, and decreased gas scores. In conclusion<em>,</em> levan itself had no effect on weight, gastrointestinal symptoms or metabolic profile of healthy volunteers. Its possible effect on obese, hypertensive or hyperlipidemic patients should be investigated in further studies