8,312 research outputs found
Rise in the price of wheat for the Bakery in the Street of the Fishmarket in the city of Lima 1812-1821
This article analyzes the information found in the newly discovered account book in the Lima National Archives on bulk wheat prices paid by a centrally located bakery for the nine year period 1812 to June 1821. The conclusion is that the price of wheat per bushel paid by this Lima bakery rose more than eleven hundred percent between 1812 and 1821 and that the profits shown after the bakery paid these increased wheat costs would indicate a rise in the price of bread to cover the increased cost of the wheat. Ships carrying wheat noted in the account book are listed
Vertical pairing of identical particles suspended in the plasma sheath
It is shown experimentally that vertical pairing of two identical
microspheres suspended in the sheath of a radio-frequency (rf) discharge at low
gas pressures (a few Pa), appears at a well defined instability threshold of
the rf power. The transition is reversible, but with significant hysteresis on
the second stage. A simple model, which uses measured microsphere resonance
frequencies and takes into account besides Coulomb interaction between
negatively charged microspheres also their interaction with positive ion wake
charges, seems to explain the instability threshold quite well.Comment: 4 pages, 6 figures. to appear in Phys. Rev. Lett. 86, May 14th (2001
Towards a Media Interpretation Framework for the Semantic Web
We present a framework for media interpretation that leverages low-level information extraction to a higher level of abstraction in
order to support semantics-based information
retrieval for the Semantic Web. The overall
goal of the framework is to provide high-level
content descriptions of documents for maximizing precision and recall of semantics-based
information retrieval
Non-Simplified SUSY: Stau-Coannihilation at LHC and ILC
If new phenomena beyond the Standard Model will be discovered at the LHC, the
properties of the new particles could be determined with data from the
High-Luminosity LHC and from a future linear collider like the ILC. We discuss
the possible interplay between measurements at the two accelerators in a
concrete example, namely a full SUSY model which features a small stau_1-LSP
mass difference. Various channels have been studied using the Snowmass 2013
combined LHC detector implementation in the Delphes simulation package, as well
as simulations of the ILD detector concept from the Technical Design Report. We
investigate both the LHC and ILC capabilities for discovery, separation and
identification of various parts of the spectrum. While some parts would be
discovered at the LHC, there is substantial room for further discoveries at the
ILC. We finally highlight examples where the precise knowledge about the lower
part of the mass spectrum which could be acquired at the ILC would enable a
more in-depth analysis of the LHC data with respect to the heavier states.Comment: 42 pages, 18 figures, 12 table
Editorial: Novel Actuators, Sensors and Control Systems for Endoscopic Robots
Editorial on the Research Topic.
Novel Actuators, Sensors and Control Systems for Endoscopic Robots
Interaction between dust grains near a conducting wall
The effect of the conducting electrode on the interaction of dust grains in a
an ion flow is discussed. It is shown that two grains levitating above the
electrode at the same height may attract one another. This results in the
instability of a dust layer in a plasma sheath.Comment: 9 pages. 3 figures. Submitted to Plasma Physics Report
Self-consistent model of unipolar transport in organic semiconductor diodes: accounting for a realistic density-of-states distribution
A self-consistent, mean-field model of charge-carrier injection and unipolar
transport in an organic semiconductor diode is developed utilizing the
effective transport energy concept and taking into account a realistic
density-of-states distribution as well as the presence of trap states in an
organic material. The consequences resulting from the model are discussed
exemplarily on the basis of an indium tin oxide/organic semiconductor/metallic
conductor structure. A comparison of the theory to experimental data of a
unipolar indium tin oxide/poly-3-hexyl-thiophene/Al device is presented.Comment: 6 pages, 2 figures; to be published in Journal of Applied Physic
Stationary Velocity and Charge Distributions of Grains in Dusty Plasmas
Within the kinetic approach velocity and charge distributions of grains in
stationary dusty plasmas are calculated and the relations between the effective
temperatures of such distributions and plasma parameters are established. It is
found that the effective temperature which determines the velocity grain
distribution could be anomalously large due to the action of accelerating ionic
bombarding force. The possibility to apply the results obtained to the
explanation of the increasing grain temperature in the course of the
Coulomb-crystal melting by reduction of the gas pressure is discussed. This
paper was received by Phys.Rev.Lett. on 11 August 1999. As potential referees
the authors offered to Editor the following persons: V.N.Tsytovich, Russia;
R.Bingham, UK; D.Resendes, Portugal; G.Morfill, P.Shukla, Y.M.Yu., Germany.Comment: 8 pages, no figure
MorfologĂa de la primera zoea de Portunus acuminatus (Stimpson, 1871) obtenida en el laboratorio
Larvae of Portunus acuminatus (Stimpson, 1871) from one female, collected by trawling at a depth of 12 m in the Gulf of Nicoya, Pacific Costa Rica, Central America (090°48.899’N, 084°40.498’W) were hatched in the laboratory. The morphology of zoea I is described and illustrated for the first time and compared with known zoeae of other portunid species belonging to the subfamily Portuninae. We present a combination of three features which allows zoea I larvae of P. acuminatus to be distinguished from other described larvae of the genus. Descriptions are based on dissected larvae analysed by SEM and light microscopy.Se describe el primer estadio larvario del cangrejo Portunus acuminatus. Las larvas se obtuvieron en el laboratorio a partir de una hembra ovĂgera capturada en el Golfo de Nicoya (090°48.899’N, 084°40.498’W), PacĂfico de Costa Rica. La descripciĂłn se ha realizado con la ayuda del microscopio electrĂłnico de barrido y el microscopio Ăłptico. Los caracteres morfolĂłgicos son comparados con los de otras especies de la subfamilia Portuninae. Presentamos una combinaciĂłn de tres caracteres que permiten distinguir la primera zoea de P. acuminatus de otras larvas del gĂ©nero
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