6,014 research outputs found
A new function of hydrocarbons in insect communication : maternal care and offspring signalling in the European earwig
International audienc
An Innovative Methodology to Optimize Aerospace Eco-efficiency Assembly Processes
Sustainability and eco-efficiency have been researched in multiple
scientific papers since the last years. However the literature is not so abundant
when applying those concepts to industrial assembly processes. This paper
presents an innovate methodology to optimize aerospace assembly processes.
Authors propose the introduction of a new element, the eco-efficiency, along
with the traditional criteria, cost and time, currently used for optimization. Using
a large Aero-Structure as an industrial case of study, the methodology analyzes
the eco-efficiency of an assembly process in connection with a Life Cycle
Assessment (LCA) to compute the environmental impact. Results are shown in a
dashboard along with the relevant Key Process Indicator (KPI) to help the
engineers to select the best assembly processEuropean Union (UE). H2020 DILECO 785367European Union H2020-EU.3.4.5.4-IT
Assessing the overall perceived quality of the undergraduate students
Purpose
- The paper is twofold aimed: (i) defining and validating a scale to assess the quality
of the university experienced by students and (ii) analyzing the role of the aforementioned di-
mensions and their impact on studentsâ satisfaction.
Methodology/Approach
- A survey of 2,557 undergraduate students that finished their degrees
in 2013 at universities located in the region of Catalonia has been analyzed using Structural
Equation Modeling (SEM). An exploratory analysis suggests the final dimensions that were
confirmed in a confirmatory analysis. The psychometric characteristics of the scale are provided
to show reliability and validity of the constructs.
An extra model (also using SEM) assesses the impact of these dimensions on overall satisfac-
tion.
Findings
- The quality is a multifactor construct composed by: (i) âsyllabusâ, which refers to
the quality of the learning methods and the coordination efforts through the whole study period;
(ii) âskills developmentâ, referring to the skills that students might acquire along their studies
and (iii) âservices and facilitiesâ of the university.
Moreover, the first and third factors act as âenablersâ for the second factor one. Nevertheless,
only âSyllabusâ dimension affects significantly on studentsâ satisfaction, whereas âservices and
facilitiesâ do not have a significant role, although they are necessary in order to provide a good
service.
Research Limitation/implication
- Although the sample is large enough to draw robust re-
sults, it is limited the Catalonia. The paper provides recommendations for university managers
and public administration authorities in order to allocate the available resources.
Originality/Value of paper
- In an era of global competition, universities are trying to adapt
to these new requirements by expanding they academic offer, introducing innovative teaching
methods, providing teaching resources to lecturers, and updating the general services of the
university among others. All these services will be considered when students evaluate their
experience at the university. The paper contributes with an assessment scale for the holistic
service provided by the university within the period that the student is in the university. These findings can be applied to help define attractive academic programs and provide useful insights
on how the supporting facilities should be designed to allow students take advantage of their
learning process at universities.Postprint (published version
OPTIMALISASI PENEGAKAN HUKUM DALAM RANGKA MEWUJUDKAN KETAHANAN NASIONAL
Penegakan hukum harus dijalankan dengan baik dan efektif dalam mewujudkan
Ketahanan Nasional Indonesia. Disamping dengan mengadakan suatu
hukum(perundang-undangan, kesiapan mental penegak hukum dalam menjalankan
tugasnya harus baik. Hal lain yang perlu dilakukan adalah dengan menertibkan fungsi
tugas dan wewenang lembaga-lembaga yang menaungi para penegak hukum.
Selanjutnya adalah bagaimana aturan tersebut dilaksanakan oleh masyarakat.
Komponen-komponen tersebut harus berjalan selaras dan seimbang prinsip âRule Of
Law
A continuous low star formation rate in IZw 18 ?
Deep long-slit spectroscopic observations of the blue compact galaxy IZw 18
obtained with the CFH 3.6 m Telescope are presented. The very low value of
oxygen abundance previously reported is confirmed and a very homogeneous
abundance distribution is found (no variation larger than 0.05 dex) over the
whole ionized region. We concur with Tenorio-Tagle (1996) and Devost et al.
(1997) that the observed abundance level cannot result from the material
ejected by the stars formed in the current burst, and propose that the observed
metals were formed in a previous star formation episode. Metals ejected in the
current burst of star formation remain most probably hidden in a hot phase and
are undetectable using optical spectroscopy. We discuss different scenarios of
star formation in IZw 18. Combining various observational facts, for instance
the faint star formation rate observed in low surface brightness galaxies van
Zee et al. (1997), it is proposed that a low and continuous rate of star
formation occurring during quiescent phases between bursts could be a
significant source of metal enrichment of the interstellar medium.Comment: 10 pages, 4 Postscript figures, to be published in Astronomy and
Astrophysics main journa
Exhumation of the Sierra de Cameros (Iberian Range, Spain): constraints from low-temperature thermochronology
We present new fission-track and (UâTh)/He data from apatite and zircon in order to
reconstruct the exhumation of the Sierra de Cameros, in the northwestern part of Iberian Range,
Spain. Zircon fission-track ages from samples from the depocentre of the basin were reset
during the metamorphic peak at approximately 100 Ma. Detrital apatites from the uppermost sediments
retain fission-track age information that is older than the sediment deposition age, indicating
that these rocks have not exceeded 110 8C. Apatites from deeper in the stratigraphic sequence of
the central part of the basin have fission-track ages of around 40 Ma, significantly younger than
the stratigraphic age, recording the time of cooling after peak metamorphic conditions. Apatite
(UâTh)/He ages in samples from these sediments are 31â40 Ma and record the last period of
cooling during Alpine compression. The modelled thermal history derived from the uppermost
sediments indicates that the thermal pulse associated with peak metamorphism was rapid, and
that the region has cooled continuously to the present. The estimated palaeogeothermal gradient
is around 86 8C km21 and supports a tectonic model with a thick sedimentary fill (c. 8 km) and
explains the origin of the low-grade metamorphism observed in the oldest sediments
Small-scale Intensity Mapping: Extended Ly, H and Continuum emission as a Probe of Halo Star Formation in High-redshift Galaxies
Lyman alpha halos are observed ubiquitously around star-forming galaxies at
high redshift, but their origin is still a matter of debate. We demonstrate
that the emission from faint unresolved satellite sources, , clustered around the central galaxies may play a major role in generating
spatially extended Ly, continuum () and H
halos. We apply the analytic formalism developed in Mas-Ribas & Dijkstra (2016)
to model the halos around Lyman Alpha Emitters (LAEs) at , for several
different satellite clustering prescriptions. In general, our UV and Ly
surface brightness profiles match the observations well at physical kpc from the centers of LAEs. We discuss how our profiles
depend on various model assumptions and how these can be tested and constrained
with future H observations by the James Webb Space Telescope (JWST).
Our analysis shows how spatially extended halos constrain (i) the presence of
otherwise undetectable satellite sources, (ii) the integrated, volumetric
production rates of Ly and LyC photons, and (iii) their
population-averaged escape fractions. These quantities are all directly
relevant for understanding galaxy formation and evolution and, for high enough
redshifts, cosmic reionization.Comment: 13 pages, 6 figures, edited to match accepted ApJ version. Results
unaffected. New descriptive flow-chart figure (Fig.6
New Perspectives for Pancreatic Cancer Treatment. Will We Be Able to Ensure Equity to Care?
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