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Record W50973252

Typology of Carsharing Members

2011· article· en· W50973252 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

aboutThe title or abstract carries a Canadian signal from the geographic lexicon.
no affNo Canadian affiliation: this work is invisible to an affiliation-only frame.
No Canadian affiliation. An affiliation-only frame, the usual design, would never have seen this work. It is one of the works that make the case for inverting the frame.

Bibliographic record

VenuePolyPublie (École Polytechnique de Montréal) · 2011
Typearticle
Languageen
FieldEngineering
TopicTransportation and Mobility Innovations
Canadian institutionsnot available
Fundersnot available
KeywordsTypologyGeographyGeneral partnershipOrder (exchange)BusinessTransport engineeringMarketingEngineeringFinance
DOInot available

Abstract

fetched live from OpenAlex

Carsharing systems are the focus of an increasing number of researches. In addition to gaining new members every week, new carsharing systems are being launched around the Globe. In Montreal, carsharing in now part of the transportation strategies to alleviate congestion and contribute to the overall aim of reducing the dependency towards the individual car. Thanks to a continuous partnership with Communauto, the Quebec carsharing operator, it has been possible, in the recent years, to provide quantitative assessment of various aspects of the system, both regarding supply and demand. This paper builds on these previous researches and concentrates on the systematic analysis of the behaviors of members, in terms of transactions and kilometers travelled. Data mining techniques are used to classify members according to various temporal units expressing their behaviors in order to propose a typology. Results show that, with respect to frequency of use, there are two main types of carsharing members in Montreal, high frequency users (≈ 2.2 transactions per week) and low frequency users (≈ 0.4 transactions per week), the later gathering 86% of the members. Results also show, still based on frequency, that there are five types of weekly patterns and that members have a dominant weekly pattern that is, in average, representative of 62% of their weeks. This study shows that weekly patterns change namely during the holiday periods (summer months, December-January). With respect to weekly distance travelled by members, two clusters are also identified, one gathering 87% of the members with an average of 14.3 km travelled per week and the other ones related to higher averages (76.8 km per week). Other classifications are discussed.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.589
Threshold uncertainty score0.654

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.017
GPT teacher head0.217
Teacher spread0.200 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it