Advanced Search
Now showing items 4891-4900 of 5108
An eccentric companion at the edge of the brown dwarf desert orbiting the 2.4 M-circle dot giant star HIP 67537
(EDP Sciences, 2017)
-mail: mjones@eso.org
2 Center of Astro-Engineering UC, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago,
Chile
3 Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Av. Vicuña...
stars with orbital separation . 3 - 5 AU (Marcy & Butler ⋆ Based on observations collected at La Silla - Paranal Observa- tory under programs ID’s 085.C-0557, 087.C.0476, 089.C-0524, 090.C- 0345 and through the Chilean Telescope Time under programs ID’s...
stars with orbital separation . 3 - 5 AU (Marcy & Butler ⋆ Based on observations collected at La Silla - Paranal Observa- tory under programs ID’s 085.C-0557, 087.C.0476, 089.C-0524, 090.C- 0345 and through the Chilean Telescope Time under programs ID’s...
LDQL: A query language for the Web of Linked Data
(Elsevier Science BV, 2016-12)
, _ ⟩ is matched by edges ⟨dA, (⟨uB, p2, uC⟩, uB), dB⟩
and ⟨dA, (⟨uB, p2, uC⟩, uC), dC⟩. The next definition formalizes this
notion of matching.
Definition 3. A link graph edgewith label (⟨x1, x2, x3⟩, u)matches
a link pattern ⟨y1, y2, y3⟩ in the context of a URI...
Work Labs
(Universidad de Chile, 2014-07)
, such as, the “Angel
Mentors” of 3IE (Universidad Técnica Federico Santa María), IncubaUC (Pontificia Universidad
Católica de Chile), Ventures UDD (Universidad del Desarrollo), Novos (Universidad de Chile),
and Octanis (Universidad Adolfo Ibañéz). Work...
. At this time, Sao Paulo was the leading city for co-working spaces – Brazil is home to 44 of the 79 LA coworking spaces, and 1/3 of them are in Sao Paulo. Chile is on the rise with five co- working spaces in Santiago, which are: Maker Space, Co...
. At this time, Sao Paulo was the leading city for co-working spaces – Brazil is home to 44 of the 79 LA coworking spaces, and 1/3 of them are in Sao Paulo. Chile is on the rise with five co- working spaces in Santiago, which are: Maker Space, Co...
Simulation and excavation of horizontal developments in Block/Panel Caving Mining
(Universidad de Chile, 2018)
This research explores the underground excavation method of drilling and blasting on multiple faces with two objectives. First, through a global investigation of mine planning, the conventional excavation system using explosives is analyzed to quantify the efficiency of tunnel construction. Secondly, the drilling and blasting process is explored to compare advance performance when applying ANFO versus emulsion in the process.
To achieve the first objective, discrete event simulation techniques were applied in the short-term planning process of horizontal developments in a case study of a mine operated by Panel Caving. The simulation model was built and calibrated in simulation software especially designed for mining: SimMine. The inputs for the model were obtained from the field in a previous study and included unit operation times, as well as interferences. In this particular case, field study showed that the excavation cycle was unnecessarily extended by the interference between unit operations. In fact, the interference found between unit operations represented the biggest losses of time. Then, to increase the forward performance of excavation, it was necessary not only to optimize the individual activities of the cycle, but also to reduce the time lost due to interferences.
For the second objective, the role of explosives in the blasting of horizontal developments on multiple faces was analyzed. For this study, the use of ANFO and emulsion was contrasted in terms of the number of boreholes, dilution of toxic gases (which represents less ventilation time), advance per round and overbreak. The data for the comparative analysis is based on blasting tests carried out in both small- and industrial-scale tests. Results showed that using emulsion a greater efficiency of advance was reached, with fewer boreholes and less ventilation time needed than with ANFO. It was also observed that overbreak was influenced by the concentration of linear charge in the contour boreholes.
In the first case, it was concluded that planning with variability in process times, as well as capturing the various interferences, yielded returns close to reality, making the simulation a support tool for decision-making in planning. In the second case, improvements were observed in the blasting operation and in advance performance in horizontal developments when using emulsion versus ANFO explosive....
de explosivos desde un punto de vista de planificación a fin de cuantificar la eficiencia del sistema constructivo de túneles. En el segundo se ahonda sobre el proceso de arranque mediante explosivos identificando para ANFO y emulsión el rol que...
de explosivos desde un punto de vista de planificación a fin de cuantificar la eficiencia del sistema constructivo de túneles. En el segundo se ahonda sobre el proceso de arranque mediante explosivos identificando para ANFO y emulsión el rol que...
Metal fluxing in a large-scale intra-arc fault system: insights from the Liquiñe-Ofqui fault system, southern Chile
(Universidad de Chile, 2017)
La combinación de un análisis estructural a escala regional junto con una extensa base de datos de isótopos de helio, nitrógeno y carbono, composición química y composición de metales traza en manifestaciones volcánicas/geotermales en la parte norte...
Surface vitrification caused by natural fires in Late Pleistocene wetlands of the Atacama Desert
(Elsevier, 2017-07-01)
or
Th
Sh
ex
m
ge
of
Ea
Cr
*
ht
00entro UC del Desierto de Atacama and Departamento de Ecología, Pontificia Universidad Católica de Chile, Alameda 340, Santiago, Chile
nstitute of Ecology & Biodiversity (IEB), Santiago, Chile
nstitut de Planétologie et d...
’Astrophysique de Grenoble (IPAG), 414, Rue de la Piscine, Domaine Universitaire, 38400 St-Martin d’Hères, France r t i c l e i n f o a b s t r a c t ticle history: ceived 16 November 2016 ceived in revised form 29 March 2017 cepted 3 April 2017 ailable online 21...
’Astrophysique de Grenoble (IPAG), 414, Rue de la Piscine, Domaine Universitaire, 38400 St-Martin d’Hères, France r t i c l e i n f o a b s t r a c t ticle history: ceived 16 November 2016 ceived in revised form 29 March 2017 cepted 3 April 2017 ailable online 21...
Lipid nanoparticles for the topical delivery of retinoids and derivatives
(Future Medicine Ltd., 2015)
[1
01
,1
07
]
In
v
it
ro
e
ffi
ca
cy
/
b
io
lo
g
ic
al
ev
al
u
at
io
n
A
cc
u
m
u
la
ti
o
n
in
s
ki
n
(
m
o
u
se
a
n
d
h
u
m
an
s
ki
n
)
an
d
a
vo
id
an
ce
o
f
sy
st
em
ic
u
p
ta
ke
[1
06
];
le
ss
ir
ri
ta
ti
n
g
(
D
ra
iz
e
te...
a n d s lo w er d ru g r el ea se in SL N -b as ed g el s th an t h e co m m er ci al p ro d u ct [6 8] ; e n h an ce d p h o to st ab ili ty , sk in t ra n sp o rt a n d a n ti p so ri at ic a ct iv it y th an v es ic u la r ca...
a n d s lo w er d ru g r el ea se in SL N -b as ed g el s th an t h e co m m er ci al p ro d u ct [6 8] ; e n h an ce d p h o to st ab ili ty , sk in t ra n sp o rt a n d a n ti p so ri at ic a ct iv it y th an v es ic u la r ca...
A GIS-based urban and peri-urban landscape representation toolbox for hydrological distributed modeling
(Elsevier, 2017)
& Software 91 (2017) 168e185E-mail address: ppsanzana@uc.cl (P. Sanzana).Keywords:
Peri-urban catchments
Hydrological Response Units
Urban Hydrological Elements
Drainage extraction
Computer-assisted mesh generation
generate three model meshes with different...
of Chile and France toIRSTEA, UR HHLY, Hydrology-Hydraulic Depar f Institut Français des Sciences et Technologies d et Sciences de la Terre (GERS), et Institut de Re g Departamento de Ingeniería Civil, Facultad de h Computer Science Department, Facultad de...
of Chile and France toIRSTEA, UR HHLY, Hydrology-Hydraulic Depar f Institut Français des Sciences et Technologies d et Sciences de la Terre (GERS), et Institut de Re g Departamento de Ingeniería Civil, Facultad de h Computer Science Department, Facultad de...
Sustainable development: Structural transformation and the consumer demand
(Elsevier, 2020)
E < E .
Assuming a fixed pure time discount rate ( ρ) and a socially op-
imal intervention, the competitive economy is modeled as if it
aximizes the present discounted value of the utility function:
∞
0
U(c, x ; E) exp (−ρt ) dt ,
ubject...
solution is: E = U(c, x, E) + λ[ A C (k − k d ) + p A d F ( k d , bx ) − c − δk ] + μ[ ψE − x ] + φ[ E − E ] 15 As Nordhaus (2012) and Weitzman (2009) argue, the consumption utility be- omes −∞ when a > 1. Since individual optimization when the economy...
solution is: E = U(c, x, E) + λ[ A C (k − k d ) + p A d F ( k d , bx ) − c − δk ] + μ[ ψE − x ] + φ[ E − E ] 15 As Nordhaus (2012) and Weitzman (2009) argue, the consumption utility be- omes −∞ when a > 1. Since individual optimization when the economy...
Effect of changing vegetation and precipitation on denudation - Part 1: Predicted vegetation composition and cover over the last 21 thousand years along the Coastal Cordillera of Chile
(Copernicus GmbH, 2018)
Tuebingen, Germany
3Department of Silviculture and Nature Conservation, University of Chile, Av. Santa Rosa 11315,
La Pintana, Santiago RM, Chile
4Nansen Environmental and Remote Sensing Center, Bjerknes Centre for Climate Research,
Thormøhlens gate 47, 5006...
Bergen, Norway 5Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Raúl Bitrán 1305, La Serena, Chile 6Department of Physical Geography, Geosciences, Goethe University, Altenhoeferallee 1, 60438 Frankfurt/Main, Germany Correspondence: Christian Werner...
Bergen, Norway 5Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Raúl Bitrán 1305, La Serena, Chile 6Department of Physical Geography, Geosciences, Goethe University, Altenhoeferallee 1, 60438 Frankfurt/Main, Germany Correspondence: Christian Werner...