756 research outputs found
Banking: Past and Present
The paper presents the evolution of the banking through out history to modern days. The roots of banking reviewed and the changes are expressed. Reasons for bank evolution is presented and first banking operations are described. The difference between past and present is traced out.Banking, ancient banking, modern banking, deposits, loan.
An implementation of IoT LPWAN SCHC message fragmentation and reassembly
This extended abstract reports about the implementation of the fragmentation and reassembly mechanisms of the SCHC framework for Low Power Wide Area Networks (LPWANs). The project aims to program the
methods and routines described in the SCHC standard protocol for the fragmentation and
reassembly mechanism while being independent of the LPWAN technology and remaining
as an open-source project. The implementation addresses the ACK-on-Error mode, where
an acknowledgement message is sent back to the sender device only when lost fragments
are detected. Initial tests have been successful using a local communication setting with
network sockets. We are currently porting the code to support the Sigfox LPWAN using
Google Cloud Platform as a cloud computing service and the Python framework Flask for
easy testing.Sergio Aguilar, Rafael Vidal and Carles Gomez were funded in part by the Spanish Government through projects TEC2016-79988-P, PID2019-106808RA-I00 (AEI/FEDER, and UE); and the Generalitat de Catalunya Grant 2017 SGR 376.Peer ReviewedPostprint (published version
Un mĂłn de mones. La persistĂšncia de Robert Robert
Cada vegada que es tornen a llegir els vint-i-set articles que Robert Robert va publicar al setmanari Un tros de paper entre el 1865 i el 1866, es constata fins a quin punt Ă©s certa la coneguda afirmaciĂł de Josep Pla segons la qual alguns dâaquests textos âi en particular el titulat La rebotigaâ sĂłn de les millors coses escrites en catalĂ durant la Reinaxença. Si deixem Verdaguer al marge, els articles de Robert sĂłn efectivament els Ășnics textos del seu temps que encara val la pena llegir; i deixar Verdaguer al marge Ă©s justament el que fa Pla per construir el seu elogi. Ăs a dir, decideix que tenen mĂ©s interĂšs un grapadet dâescrits humorĂstics destinats a entretenir els barcelonins el diumenge a la tarda, que no pas una obra dâabast espiritual, ambiciosa i extensa com la de Verdaguer. Per si aquestes circumstĂ ncies no fessin encara prou escandalosa la preferĂšncia de Pla, la llengua amb quĂš treballa Robert Ă©s dâentrada un material rovellat, carregat de llacunes dâimperfeccions, i que no tĂ© per model sinĂł el que lâorella pot captar sobre la marxa a les converses ordinĂ ries dels ciutadans. Verdaguer, en canvi, que tambĂ© es veu obligat a modelar el catalĂ literari sobre la base del que sent dir, posseeix un coneixement profund de la parla dels pagesos de la Plana de Vic, molt menys contaminada que la de Barcelona, i un instint pel llenguatge poĂštic que fa de la seva obra un dels fonaments mĂ©s segurs de la literatura catalana moderna. Com no podria ser dâaltra manera, Pla reconeix aquesta realitat, perĂČ al final en conclou que âper al gust dâavui sĂłn molt mĂ©s interessants les descripcions vulgars de Robert que les retĂČricament tĂČpiques de Verdaguerâ
Pseudo-global Fitting of Gapped Helioseismic Data
Mode fitting or "peak-bagging" is an important procedure in helioseismology
allowing one to determine the various mode parameters of solar oscillations. We
have recently developed a new "pseudo-global" fitting algorithm as a way of
reducing the systematic bias in the fits of certain mode parameters that are
seen when using "local" fitting techniques to analyse "sun-as-a-star" p-mode
data. This new algorithm has been designed specifically to gain the advantages
of fitting the entire power spectrum, while retaining the efficiency of local
fitting techniques.
Using simulated data with a full fill we have previously shown that the
pseudo-global routine reduces the bias in estimates of the frequencies and
asymmetries and in the estimates of the solar background when compared with a
traditional fitting technique. Here we present results that show that the
pseudo-global routine is also effective in reducing bias in the parameter
estimates when the time-series has significant gaps. As such we are now able to
employ the routine in order to fit ground based helioseismic data such as that
collected by the Birmingham Solar Oscillations Network (BiSON).Comment: 6 pages, 3 figures, to be published in the proceedings of GONG
2008/SOHO XX
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