9 research outputs found
Cold-Curing Structural Epoxy Resins: Analysis of the Curing Reaction as a Function of Curing Time and Thickness
No full textThe curing reaction of a commercial cold-curing structural epoxy resin, specifically formulated for civil engineering applications, was analyzed by thermal analysis as a function of the curing time and the sample thickness. Original and remarkable results regarding the effects of curing time on the glass transition temperature and on the residual heat of reaction of the cold-cured epoxy were obtained. The influence of the sample thickness on the curing reaction of the cold-cured resin was also deeply investigated. A highly exothermal reaction, based on a self-activated frontal polymerization reaction, was supposed and verified trough a suitable temperature signal acquisition system, specifically realized for this measurement. This is one of the first studies carried out on the curing behavior of these peculiar cold-cured epoxy resins as a function of curing time and thickness
The aspect ratio of epoxy matrix nanocomposites reinforced with graphene stacks
No full textThe improvement of physical and mechanical properties
of nanofilled matrices significantly depends on the
average size of dispersed fillers. In particular, the aspect
ratio of lamellar nanofillers, such as graphene
stacks, results from a combination of both filler morphology
and processing techniques. In this study,
nanocomposites were obtained dispersing three different
graphene precursors in an epoxy resin: expanded
graphite, commercial graphene nanoplatelets, and natural
graphite. Epoxy matrix nanocomposites reinforced
with graphene stacks, ranging from 1 wt% to 3 wt%
were prepared and characterized. The structural, mechanical,
and thermal properties of expanded graphitebased
nanocomposites, as well as the rheological
properties of liquid resin/filler suspensions, were studied
and compared with those of the unfilled epoxy matrix
and of the matrix filled with natural graphite and
commercial nanoplatelets. The comparison of mechanical
and rheological properties with simple mathematical
models indicated that the aspect ratio of expanded
graphite is in the order of 1000, i.e., a dispersion of
nanoscale graphene stacks was obtained. This result
suggests that the measurement of engineering properties
of nanocomposites not only represents an objective
but can also provide information about the average
degree of dispersion
Cross-cultural perspective of driving style in young adults: Psychometric evaluation through the analysis of the Multidimensional Driving Style Inventory.
No full textSelf-evaluating methods are frequently used to identify driving styles. Among others, one of the most commonly used questionnaires is the Multidimensional Driving Style Inventory (MDSI), developed for the Israeli population. Because of the extensive use of the questionnaire, the present paper aims to validate an Italian version and to confirm the 8-factor structure of the original one, i.e, dissociative, anxious, risky, angry, highvelocity, distress-reduction, patient, and careful driving style. The Italian version of the MDSI was filled out by 561 Italian drivers, who had a driving license for at least 1 year. A confirmatory factorial analysis (CFA) was conducted on the 44-item of the translated questionnaire showing not so good values of the goodness of fit tests (SRMR = 0.085; RMSEA = 0.063). The total-item correlation of each scale indicated that 4 items had a low index of total-item correlation. A second CFA was conducted on the remaining 40 items: goodness fit parameters improved (SRMR = 0.0685, RMSEA = 0.0584). Previous validations of the original version of MDSI for different populations (Argentine, Romanian, Chinese, Malaysian, Butch and Belgian) showed several critical issues in confirming the original structure. In the Italian version of MDSI validated in the present paper, the original 8-factor structure was confirmed by removing the 4 items which did not properly contribute to the factors. The results not only confirmed the usefulness of the MDSI in assessing driving style but they also indicated that the concept of driving style is considered in the same way in Italy and Israel, even though traffic rules are different. The latter consideration raises interesting questions for future research concerning cross-cultural comparisons of driving behavior in different countries
Real-time coaching programs for Manage-How-You-Drive insurance schemes: Analysis of retention after feedback removal
No full textManage-How-You-Drive (MHYD) is an innovative usage-based insurance scheme where drivers are charged premiums based on their safety performance, incorporating real-time coaching programs to provide drivers with contingent feedback, nudging them to drive more safely. As limited research exists on these novel schemes, this study aims to confirm their effectiveness, by expanding the sample size and the scope of analysis from a previous study by the authors, and to specifically focus on the retention of improved behavior and the impact of driver characteristics and feedback types on retention. A driving simulator experiment involving 100 drivers was used to test four feedback systems, with different modality (auditory vs. visual) and valence (i.e., pleasantness of the feedback: positive vs. negative), based on the occurrence of Elevated Gravitational-Force Events (EGFEs, i.e., harsh acceleration/deceleration events). Drivers completed three trials, spaced four weeks apart. The first trial served as a baseline without any feedback, in the second trial one of the feedback systems was presented, and the third trial had no feedback. Program effectiveness and retention were assessed based on EGFE occurrences and mean acceleration/deceleration. Its indirect influence on speeding, tailgating, and lateral control was investigated to assess potential additional enduring effects on safety performance. Drivers, especially those identified as “aggressive” during the baseline trial, not only significantly benefited from using the coaching program, but were also able to at least partially retain such benefits in terms of acceleration/deceleration, speeding and tailgating, irrespective of feedback type. These findings highlight the potential practical advantages of MHYD real-time coaching systems for road safety
Visual Feedback Effectiveness in Reducing Over Speeding of Moped-Riders
No full textThe use of assistance systems aimed at reducing road fatalities is spreading, especially for car drivers, but less effort has been devoted to developing and testing similar systems for powered two-wheelers (PTWs). Considering that over speeding represents one of the main causal factors in road crashes and that riders are more vulnerable than drivers, in the present study we investigated the effectiveness of an assistance system which signaled speed limit violations during a simulated moped-driving task, in optimal and poor visibility conditions. Participants performed four conditions of simulated riding: one baseline condition without Feedback, one Fog condition in which visual feedback was provided so as to indicate to the participants when a speed limit (lower than that indicated by the traffic signals) was exceeded, and two post-Feedback conditions with and without Fog, respectively, in which no feedback was delivered. Results showed that participants make fewer speeding violations when the feedback is not provided, after 1 month, and regardless of the visibility condition. Finally, the feedback has been proven effective in reducing speed violations in participants with an aggressive riding style, as measured in the baseline session.POR FSE 2014-2020
2105-56-11-2018Generali Italia S.p.aSpanish State Research Agency
RYC-2015-1748
Carta Geologica d'Italia alla scala 1:50.000, F. 056 Sondrio
No full text<p>Foglio geologico alla scala 1:50.000 basato su rilevamenti alla scala 1:10.000 comprensivo di legenda, schemi a cornice, sezioni geologiche.</p>
4
No full textMAYFIELD ITEMS.
Miss Susie Sijuircs'of San Jose
i Miss Martha Pinkham of
Alameda • was visiting friends
College Terrace this week. She
left Wednesday for Cloverd
, where "she will remain some time
| visiting relatives.
| Families supplied with oysters
wa„ t0!in any quantity at the Creamerie
; Restaurant. .—v_, *
Try the San Francisco Laundry
■ E. C. Mosher, agent. "
M. L. Clark
:Fr,
mvwk of
rwwww8WEET8l
■h Candles, Tol-mrou, Cigars,
, Oltfatettes, Fruit*, Spict|e, Tea |
Coffee; Bread; etc;
ralle
M stand
.Menlo l'i
is visiting relatives in this vicinity,
Mr. and Mrs. Priddie,were visit*
ing friends in San Jose this week.
Mr. add Mrs, F, Black of Santa
Clara were visiting friends this
week. They are on their
Seattle.
Mrs. Marten, a well known resident of this place, died at the
French hospital this week after a
long illness*
Thomas Hetily of San Francisco
was visiting his children here this
week, the guest of his sister, Mrs.
Peter fjuiuii.
Mr. and Mrs. Peers were in attendance at the Santa Clara County Sunday School Convention held
in San Jose Tuesday.-
Mr. Stengel of the Summit who
has been confined to his bed for
many weeks, at the residence of
Mrs. Dornbergcr, is able to he out
again.
Peter (juiun, our well known
townman aud contractor, was in
the city this week making arrangements for bis tiip to tbe Klondike.
On Friday evening last a very
pleasant evening was spent at the
residence of Mr. and Mrs. Priddie
by the members and friends of the
Mayfield Epwortb League.
John Henderson, who, has been
visiting his mother at Madrone;
during the past week, returned;
Tuesday. Mr. Henderson will be j
employed on the Hotclling ranch ;
near this place.
.Miss Nellie Anderson of Paso
Robles, who has been visiting in I
this vicinity for the past two
weeks left for San Francisco onj Completely Furnished
Wednesday to visit friends before 1 \ye will write your Fire Insurance
returning home, in any of the following Com-
The Peterson brothers, well! panies.
lip J Colds
Are now quite troublesome, perhaps you would not let
them run along if vou were sure of something good, our
jRED SEAL COUGH BALSOM
is twice the size and twice as good as the average Cough
Medicine, money back if you donl like it.
the MES1.0 i'.uik About our Emulsion of Cod Liver Oil, 65c.
W: H. Hoon
we will linve more lo say next time.
Hall's Pharmacy
Meto Store Neto Goods
FULLER & CO.
W.ALKHS IN
Provisions, Ci-ockery,
GLASSWARE
Choice Butter and
Mill Feed, Smoked Meats, Etc.
Groceries
Eggs a Specialty
Fine Business
Property a
Specialty
FOR RENT
116 Room House
Lowest
Prices in-
Town' on
^naplled Ware
KeWstock just arrive-1 at
L. DAHL
University Ave.
Opposite Bank
known in this place, will leave on
Sunday for Klondike. They have| —^*>|
been there before and being acquainted with the country no
doubt they will meet with success.
A party composed of four of our
townsmen will leave for the frozen
north on the fifteenth of this
month to try their luck at gold
digging. They are all expert
miners.
The following wete in attend-! "V
ance at the Santa Clara County IN THE
Sunday School Convention asdele-j_J_|ltlial Blllldiflg 311(1
-gates from the Mayfield M. E.
Sunday School: C. D. Tibbals,
Benjamin Scott and Miss Bertha
Elliott.
The members of the Junior
League of this place will give an
entertainment in the hall adjoining the M. E. Church on the 22nd
of this month and as they are preparing an interesting program for
the occasion all who attend will
get their money's worth. The ad-
missonfce will only be ten cents
Mr. and Mrs. Chas. Barrack of
San Jose are visiting friends and
relatives here this week, the guest
of Mrs, Barrack's parents.
LONDON _ LANCASHIRE
of Liverpool. I.hk-
HARTFORD
Of linn Turd. Conn.
ROYAL EXCHANGE
Of London, I'ni;.
NORFORK FIRE
of Norforfc. num.
Monev to Loan
Loan Association
OF
San Jose and College Park
Apply immediately to
T
W. H.Hoon
Office with Curtis Tobcy. Jr.
Next to Hall's Pharmacy
S. H.
Main St. Redwood City.
DenierIn
I Freuli Fish, Fruit, Candy,;
i NulH.-CiKiirs, CUmrettt-8, Kit*
Pish
Telephone Main as
STROMER
BACKUS
Paints,
Palo Alto
Oils, Wall Paper
MnTlicld.
and
Glass.
I'. I.UXI'
L. A. GAIRAUD
GAIRAUD & LUND
Plumbing and
Tinning
Steam and
<-*-_Genera
All work ilone promptly nml satisfactoriutly
High street, opposite Post office,
Gas
Contracting--^
Fitting
Palo Alto.
THE PIONEER
A. W. MEANY
"Perfect Fit Giirantced"
ALL WORK STRICTLY FIRST-CLASS
Best or Reference. CLEAM-IG IIYEINO A REPAlKl.t'G Cor. High anil I'ni.-ctsljr
Merchant
Tailo
