6 research outputs found
Implementación de un controlador MPPT difuso rentable en la placa Arduino
No full textThis paper presents the implementation of a fuzzy controller on the Arduino Mega board, for tracking the maximum power point of a photovoltaic (PV) module; using low cost materials. A dc-dc converter that incorporates a driver circuit to control the turning on and offof the Mosfet transistor was designed. The controller was evaluated in a PV system consisting of a 65 W PV module and a 12 V/55Ah battery. The results demonstrate the superiority of the fuzzy controller compared to the traditional P & O algorithm, in terms of efficiency and oscillations around the operating point.Este documento presenta la implementación de un controlador difuso en la placa Arduino Mega, para rastrear el punto de máxima potencia de un módulo fotovoltaico (PV); Utilizando materiales de bajo coste. Se diseñó un convertidor dc-dc que incorpora un circuito controlador para controlar el encendido y apagado del transistor Mosfet. El controlador se evaluó en un sistema fotovoltaico que consta de un módulo fotovoltaico de 65 W y una batería de 12 V / 55Ah. Los resultados demuestran la superioridad del controlador difuso en comparación con el algoritmo P & O tradicional, en términos de eficiencia y oscilaciones alrededor del punto de operación.Robles Algarin, Carlos Arturo-9289f664-b72e-4d79-98c9-4f5d2aa70c08-0Liñán Fuentes, Roberto-869cab3e-2405-4d2b-979e-ef314e10dc0a-0Ospino Castro, Adalberto Jose-0000-0003-1466-0424-60
Rastreador solar de doble eje para uso en sistemas fotovoltaicos.
No full textImproving the conversion efficiency of solar panels has become a challenging area of study for researchers. Solar trackers are an alternative to reach this goal, as has been shown in many cases, by tracking the position of the sun changes, the productivity of the panel increases. This paper presents a new design of a dual-axis solar tracker system based on a real-time measurement of solar radiation in order to improve the conversion efficiency. As a first design stage, the dynamic models for solar radiation, solar panel and electromechanic system, were obtained using Matlab-Simulink. Then a control unit for capturing the signals from radiation sensors and an inertial measurement unit, was implemented in a High-Performance 16-Bit Digital Signal Controller DSPIC33FJ202MC. The acquired data are compared with a mathematical algorithm to calculate sun's position and set the control action to orient the panel. An embedded system with real-time sampling was developed. It does not rely on external databases and takes into account the relative position between the radiation sensor and solar panel to improve the efficiency of the system.Mejorar la eficiencia de conversión de los paneles solares se ha convertido en un área de estudio desafiante para los investigadores. Los seguidores solares son una alternativa para alcanzar este objetivo, como se ha demostrado en muchos casos, al rastrear la posición de los cambios del sol, aumenta la productividad del panel. Este documento presenta un nuevo diseño de un sistema de seguimiento solar de doble eje basado en una medición en tiempo real de la radiación solar para mejorar la eficiencia de conversión. Como primera etapa de diseño, los modelos dinámicos para radiación solar, panel solar y sistema electromecánico, se obtuvieron utilizando Matlab-Simulink. Luego se implementó una unidad de control para capturar las señales de los sensores de radiación y una unidad de medición inercial en un controlador de señal digital de alto rendimiento de 16 bits DSPIC33FJ202MC. Los datos adquiridos se comparan con un algoritmo matemático para calcular la posición del sol y configurar la acción de control para orientar el panel. Se desarrolló un sistema embebido con muestreo en tiempo real. No se basa en bases de datos externas y tiene en cuenta la posición relativa entre el sensor de radiación y el panel solar para mejorar la eficiencia del sistema.Robles Algarin, Carlos Arturo-9289f664-b72e-4d79-98c9-4f5d2aa70c08-0Ospino Castro, Adalberto Jose-0000-0003-1466-0424-600Naranjo Casas, Jose-e9cec470-88af-44f8-a8f0-eb3ba63e2a54-
0000
No full textiailg fata Alto 3wt£8
VOl.l'ME
K1C.1IT PACES
PAl.O Al.TO, CAL.. THURSDAY; JI'l.Y ji, mi.y
.EIGHT PAGES
Makes Hard Work Easy!
DUSTING, cleaning tad poJiihinc l-trdwood Aoan it haid, back-bewkiac
■work. An almoM nertr rr>J,t „ t_-_ and seldom _.:,-.*., i,,(> iht old way.
aaa mm easy, -*p_ck and rati-factory the arm stay—-ting iht* O-Crdar
a*a*haa_Mop. v. nh it you c_n -rpcnd a lew minutes doing what it
"- *■ -SB S tt, TvtkU-fl, JHIIaJliCl-. r "
i *m* on - a_ta •« mi- ___ IM*-
0_feM°P
Palo Alto
Hardware Co
"Mellow Creams" COMPANY L MAM DECOMPOSED BODY COLLEGE ROMANCE
The perfecion of ENTERS RIFLE i FOUND ON FlOOD LEADS TO THE
^ (fnter CONTEST ESTATE ALTAR
Chocolates
See window display of
Mellow Creams put
up in Specia! boxes at
60c per lb.
WOOD
A Big- Load for
1,600
Si--..-i--:m tn house muat ha
-...i.t flwnei leaving inwn
K\ i-|iti.niiiti> wHI-buMi hones
thr.-.* slept tig luoiim (ira-iilu..-
Lant* lm _o»|.*.o rinsr 19
both rarl'D-M Smith el Ave-
nm- Rlghl minute*' walk to
station Trrnis
University Realty Co.
Sji Frjicisco Palo Alto
Thi* situ nnt* rOtnpel
will lr-.,ml In tlir rifle
Sarrnmrmu left their home station*
Iim|-i\ Cm tin* atate range From
Hii*. imiiilHT htii-i-n tticii will In*
ali.i-i'ii in icpresi'tit tin- "iui,* nf fall*
r,'i rn 1 ai thi* international military
large' tnnit-ist to In- hc.tl ;it Camp
Pom. Ollln nilliltirni'llll- August Ifi
Itirid i«aill* (rani nil over lha
j wurlil as Well us from Un- ilinVirlll
' i*t -ies of tiuv-t'nlnn. w 111 I-- repre-
! sentf.l rirlllan* will alao Ih* rib
[slhle for sonic of Ihi- rnnteKf*. imtng
.tin* mllllar-) rifle nmi at reprssanta- wood fit;
■M-.I-. or tn-s N'aiinnal i'in.> AMoela- m'titicd O
. who1 While ..11 iii* -tn*- :.* Hie ftmpi San t***ran-**l«ro. Juli :'.l Another
teal allot * .liiit.li hoy* .Int. In Menlo, .neiln. atlnnal it.in_ii.i- ts ttl-li had It*
I'jttk last evening Dnvltl Iti-mh Ji ime'.t-on !n llie rlasarnonia nl Srnn-
tln* :i 1.in ..i-i -on ui iiiiviii itoiidi for- I'nlvernli) (unnil » rmpp) rai-
sunerlolendeiil nf tin* Jaiti-tw 1. iniiiiiti'Mi laal iilghl in III* marriage
Flood entitf*. Mumbled mat the dn- of Mia* AuguMa \i ('phem. u itopn-
mmi-osr-d body n[ .1 ntnn evidently . lm young wontitn formerly nf I'aid
:.a year* nf age "•>■■■ remain* worel Alio uml Krnesi 11 Matter. >■ ■•■it..-
Ivhi- on ihi* ground lnin-iilli simic j oiigllieet im» .oiinerled will, th*
heiiw foliage and uni. tn men ani Weaie-rii Snani Uoflnlmi noinpen*-
advanced stage or deeu) thai tlu« lea The nuial 1 1-0 wedding nf the-
lure** tu*ri* nol i .*, i.jntljahlr pupulai voun*; .oti|ili* tm « |.r,.tls
llonrh hurried lo Men In l_rk uml j nfT-tir and *•»•* an*nile_ to nm In
reporte- hip dlN-ovar*- to lha lied-1 llmatt* friend* and <-li»f roladtes nf
lliorltli**.. who In tiirnlli.- |mlt \ iiiiniliei ill f.irnu't eo-
ar llarrv (I I'limln* In "(ml.nt*. nf Hlatiforil wen* It in una thi*
S FLY TIME-»M hlfh tins rm
Thr I*...) truln to Hallnas Sua-
' day wiii aitni at Palo Aim ni 1:1-
ItftrjrntnK tn thr rvrnlna tl wlll
. leavr Salinas ai > •- Instead of
T p in
.1 I! ui'a-niiip tms relumed from
a w**ak'a trlfi io Ihe Snn .toaqnln
rail'} nnd sn** In.* I*, ii'"- ra-aily for
ibr fall bnnnewti
•Jin flj-th. uiri (rttl. Din s-vc-rm, MUS
rV-or-s. S.VS-:RMBH sntl ■tumysnc** in hand
lin-r «.« t Qu-rti. i'.c. half lal**. Or. -tl.
11 "to. wnh oor mou-r __-*k -s-rr«**-*ii-r.t mt
rtrry csn Umc goes out. Wr know - kt-rp* ,
UmaoO.
\ fl 1,1. LINK 0¥ lt»l I.THV RIOC.
RMff v\n ll'I'IMMl'N \T
Horabin's
Coal Yard
325 Hamilton. Phone 60
BARGAIN
Lot 50x200 feet, on improved street, all fenced:
southeast (acin***: fine established neighborhood.
Price, for few days only,
J. J. Morris
Phone Palo Alto 43
NICTONE
Kills iiiM.-i.ts mi plants
and saves the llowers
25 cents and 50 cents
a bottle
The University
Pharmacy
F. J. STEINMETZ
Palo Alio, Redwood Cily
Auto.Restai
*i-^81MflSer ears, day ami
night. *.••!■ per honr Kale* on
requcal *f -rents t-arh. riiy
llniltj* Mahl wnrli tsolli-lted
1'hnnr Itedwond Pit- .l.'.R
I'alo Alto phona 131
MA Alma Sirrrt.
NEW YORK
STYLES
as shown by
Wideman
and
Son
Sateen Cravat* and Madras
Collars
Moth ihr- Mf-'Irk* idi-ft an.l
'In- ili-i'-i (mini "tinin* 'ii -Milan win p-jj-i. a ireinandoua
vogue thl- fall
Tlir or* nilawat rollar
wlih th« W-w froni uml mod-
r rai cly Mich limk Is fi-im ti-il
to aatn a Mil! larger measure
of txiimlarlty
Thf* vfij-i]». (or rravatlnjt* I*
for eravati rail of colon if ail
■badea and tlnta. in floral iio-
alttna. illnicnnals nmi Incooaple*
uous fljtiire*
Slarr thi- doellna of dnsrd-
front foul r-ollarn ihr wlrtY
o)n-ii end i-riivat wjl) }*m n-rd-
We have them.
Tailors Haberdashers
124 University Avenue.
I linn Th.* war danartmeni han ]ual
{ re. i-HjmI a valuable and hamlaomi'
jiiooh-.. dnnaled hy Ihr civilian rifle-
Emen "f Franca Tha: r-ianir*. has
jalst. sj«ih M»vrn rtlhtM iniiihtr-s H<i
{woll as u >tron|t Irani Tin* I«r-***l
lenmiMitltlon mithor|tl«.a liav* {ilar-ml
j ihi* Kranch trojihy a* a irfbute to
lltif t't.-mti ,■■'.'.■ (or lha man tnak-
jiiia ihe hlftbarl individual aeon*
IHIiir Kuroiiean . minlrii--. have also
-.nn irnphlaa
j Aa n ii*|iri'H«*niatlvi. nl I'nlo Alio
t t'omiiani I. send* I'orporal H H
Wilder to Oaeramrnto for thr ftnaj
itnoiit n is aniieliiaiod that Wild-
j n i.r.i,i.iK ... i.iiiii win unaba ihr
11eitin. Willi )il» gti'i.t imiirntemrnl
[shown .luring, the li^t (Wfl wrrks
Hii* Maii'.-itilii.
t rhanrfw »rr irn fined
hii
South San Pranelaen Tho coronerI Kuaaia
i-ntiiniuiilrali'il wllh his Kritwooil ( Tin* -pjIiIIiik rrrrmnnt »»* < fl*-
Cllj deput). John E l.ayna. wbOlbraied III Ihr |iarlor nf Ihr hum** r
nram t*. U-unlo Parli about ■ o'clock! lha bride's iwrwtia, IH«1 Rarraroento
and rrinorad llie remain* lo his un*|Mrmi m n o'rlorti iho ll»t (Villlam
dorlaklns I'rtnlill-shninil In lleilwiHMlj Itndi-t iilll.-liitltiK Tli- .eiemotiy
riit This morning a further search j took idic** under u canopy otl graehv
ratealed a i*uat) revolver lying on ami .-■ r-prtiabl* wonderland bttwar
thr gMiiinil near the **liOt wheir Ihr
body was found, .md lha ■uiborttlaa
an- iiirltiinl M> believe ihiit Ihe lane
is uni* of aii1r.de
Tha inriisi* la lhal of a man or
mure lhan middle ag»*. an.l who rvi-
<ti-nlli was In itooi • irruuintan.e*
A'loiiliiiK to iho'i- whn I'lewed 'hr
Imi)i {.tt ihai ti-tnaini'ii were ihe
hones r tht* skcleion covarod wlih
[irtiilir.l »klu and a sail nf .-toilics ol
|tnnr i|tia)ltt The hair was dark In
•i.t... ami thin Tin- <l
tirllrtr- drnlll o.-.irr,.,|
Joullin's Recital Will
Have Excellent
Attendance
WELL-KNOWN VIOLIN 1ST j
APPEARS TOMORROW
EVENING
■if Amrrtean hi-auticH
I'Niiylng a In till* s showrr IsOUqual
of Hilt*-, nf tin* valley ami lirlde**
roaea. 'he bride |iraeant-i*d *■ moai
* hat mini plrluro She was atlrac-
tlvrlt ..itlii.I In a filmy gown nf
White tii.-*.-ailin' Thr rrcallon waa
situl.li- In imltirn. tint of rxiirnaive
malarial
Tin- couple wore unattended and
thr ■ ■- ■■!.. rrrrmony waa ilswl
Mr and Mr» Stalier have Iiern
.ronorl (Hiptilar lor a number ol r-aara The
than a I bride until recently haa had the
iiinijin iiim of mi acknowledged po-
t'nroner IMv-mlre bus dtwlilnd 'o_ui.hi in Sun Pranclaeo aoelal »nif
hold ih.* It.-ju.-i inmurrow nil).ouch . tll„B|,-«l elrclaa a* the arroni|ianUl
'ihr .-tart iluir h.,*» nm tM-on s,*l j „, \|4, |tP„xlr ('nrdon. Ihr notnt Kan
-• j I'tiiii. is... lenor Thr )-ri,i,ii. haa n
IMKS HOKAHIN-S BROTHER j llOH, „f rrii-nd- Hi thla rlty and la K
KILLED IN SALT LAKE |(.l-,,,t„, i-luhn.nii Ile came lo Call-
i fornln iu enter Stanford in ID,'
Aftrr ri-i'iitrilng rollage ht* aradn-
- \\ ,it.
Mt-. . .
11
an ■,. I ,.t..I '-.I
. h-I
, I
11
The
■*t|ii" tafion ol ft
uittuii r..*t evenlllR
in Hal In **ln""nli
jrrlleni aM-mdMin
[ill Kllltll* Iriiilllu
j Unit
| ll-.hli-. thr rhnlr-i ...|.~-i1-*,.* of
i fcr.-.l t.i .loullln hluiti-lf. there will
Iln* anine '-m-i.M-:h d ll elf and trios
I>. DmiaM Forbes whn i»H>k Palo
] Alto hv mot in when he i.laynl here
laal trar will appear and drllght all
with hi. cH.rl.iiis playing of the <«*tl*i
Mrs .loullln will prealde at the
piano Itudolnli l-Vlls. h will tnkr
fi-trt In thi* program Thl" wlll tu*
his flrsi appearance "inn* hu rwttai
trn months ago
The full program will be pobllahed
In The Tim**" tomorrow rrrnlng
Those who itr-lighi in ea eel lent mush'
woll rendered should nol miss this
n-i*wirtunliy for »n rnjoynblr rvrnlna- And bmldes having a Irrat.
f thr> wlll add. hy their |ii*t-***--nrr. to
the K-sllnuMilal trnderrd the artla'
I of the evening i
,-t.ri I W..1,!,. :'«. .,■ ,,i||.Mi,..bdi
.uhoi !.. S.tll Lake tV, Tli
i»j.I il. .I.t.,,1. -.nd n..tl.in_ fitrther
li ■■' il -Lm
Mt U,., I.U nit. aluMil u i,.Li. ..1.1
■ I *..,.[ I... o ,-.-,.',.,--) io .. iripon
■ l■ a. i|i. >ii Irur Ml RIM *.i. >r. Iiy the
mm.■;... Si.,1 _n,| VVtft* i-.ttipany.
t'> li. adipiarie't U*§ it** -,-_•*■ frvc
.!• in S-.li I-j-t i .i. th. Mil. and
lid ..ir vt.ilitiv r*'l..i* .. in |„,
o.ld.l ,.li.l III*. 111-«tl.< I ll .. in S..H
.incisco
Mr llnrabiit -*vs iht- rrmains will
l.r..11,-hi i„ *-.,,. F ,..-... .,...1 th.
urra] -.ill (..I. pi*,- m'ai Silurda]
ati-d In li*I" It wan during bin
l.tiian teami nt Stanford thai tin
rtabtp of ihe pair hrgaii. anil
nl In a atirprtie for llielr inany
lr ! frienda aeva'ral weeka ago whrn the
wedding atinoini"a*iin*iit was niadr.
Mr and Mrs Stalier left thla
morning 'or laika Tahoe, and alter
a |-Wii weeks' sojourn thi-y »U1 re
turn lo thla cllj* nnd will laler rnakf
their raaldenca at :*.in.-- '..-:-■. whare-
llu- groom Is connected with Ihr »n-
gai ij-riniug company
Mrs Wllrnei Vount and 'iMI*-
daughlOl are apeiidlllg a w-nrk -nl
friends In MoD'ure***.
Miss Mary and I.aura llerog en-
tortalned -• part) or friends laat
evening
Tl. k-
, nt the I'nlvrr-
ally drug more and at Wrlngartner's
Thr rlty rnunrl) will rnret ni*sl
Mondav mornlnR al 1*9 o'clock an a
board of .-(*un Ilia tion Any clilirn
may file n protr-i uml rr*--*lv»* . nl
hearing from Ihr tt-oard
Morton's Cash Store
Phone 92 **2.50 to 1
Real Shoe Bargains
Novelty Theater
THURSDAY AND FRIDAY
TWO REEL SPECIAL
"The White Slave"
(Oil -MT4llt-KtA)
Ihlp -i ..i.t -.r Uilllams.
iiU). ilir i,-..,iini- part,
-*u|i|nt-ti li) a aeteci **>* of \ n..-..,.j.n atone*.
■\\ VI.MOMJ-KiUI M.%11)"— Willi Hal) Fuller.
"4JSK CAST ILWIVH TK1.I,"-WMIi I lie "Invablr old lai|," M,-.
kfnnrler.
AI.MIMIn*. 10 (-FXT-* FIRST SHOW ?.45
Yt)UR LUMBER JBIl-L
ti. rr/nrrd not hother **ou. For owr
p.HVra are as moderate aa any antr
»■ our lumber i*. so aound tt laata for
yaara ron'll nol hnve another bill m>
pay for a long time. What is yoor
present need? We carry e«er-.tblac
from heavy sill branta lo sltlnglaa
SANTA FE LUMBER CO.
M., AH.I. ( al. raOK| tm
Evaluación de la acumulación de elementos traza en las costas tunecinas mediante el uso de biomarcadores bioquímicos en Perinereis cultrifera
No full textOur study aimed to evaluate the effect of trace element pollution in the polychaete Perinereis cultrifera (Grube, 1840) from two Tunisian coasts (the port of Rades, S1; and the Punic port of Carthage, S2). To this end, we used an approach based on proximate composition, biomarker responses and trace element bioaccumulation. Our results showed a decreasing order of metals concentrations (Zn>Cu>Cd>Pb) in P. cultrifera from S1 and S2. The accumulation of Cd, Cu and Zn was significantly higher in S1 than in S2, especially in summer. Lipid, protein and glycogen content also changed significantly between S1 and S2 in relation to trace metal accumulation and environmental conditions. The results revealed a higher level of thiobarbituric acid in P. cultrifera from S1 than from S2. In addition, the enzymatic and non-enzymatic antioxidant defence system (catalase, glutathione-S-transferase, superoxide dismutase, glutathione and metallothionein) was enhanced and acetylcholinesterase activities decreased in P. cultrifera in S1 in comparison with S2. A principal component analysis showed that P. cultrifera from S1 exhibited a clear disruption of oxidative stress responses and trace element bioaccumulation among seasons. Overall, these findings revealed the sensitivity of those organisms to environmental conditions.Nuestro estudio tenía como objetivo evaluar el efecto de la contaminación por elementos traza en el poliqueto Perinereis cultrifera (Grube, 1840) de dos costas tunecinas (S1: el puerto de Rades; S2: el puerto púnico de Cartago). Para ello, hemos utilizado un enfoque basado en la composición proximal, las respuestas de los biomarcadores y la bioacumulación de elementos traza. Nuestros resultados mostraron un orden decreciente de las concentraciones de metales (Zn>Cu>Cd>Pb) en P. cultrifera de S1 y S2. Nuestros datos mostraron una acumulación significativa de Cd, Cu y Zn en P. cultrifera recolectada en el puerto de Rades (S1), especialmente durante la temporada de verano, en comparación con las del puerto púnico de Cartago (S2). Asimismo, los contenidos de lípidos, proteínas y glicógenos cambiaron significativamente entre S1 y S2 en relación con la acumulación de metales y las condiciones ambientales. Los resultados obtenidos revelaron un aumento del nivel de ácido barbitúrico (TBARS) en P. cultrifera de S1 en comparación con S2. Además, se observó un aumento significativo del sistema de defensa antioxidante enzimático y no enzimático (catalasa CAT, glutación-S-transferasa: GST, superóxido dismutasa: SOD, glutatión: GSH y metaloproteína: MT) y una disminución de las actividades de la acetilcolinesterasa (AChE) se observaron en P. cultrifera del puerto de Rades (S1) en comparación con las del puerto púnico de Cartago (S2). El análisis de componentes principales (PCA) mostró que la P. cultrifera de S1 presentaba una clara alteración de las respuestas al estrés oxidativo y la bioacumulación de elementos traza entre las estaciones. En general, estos resultados revelaron la sensibilidad de estos organismos frente a las condiciones ambientale
