Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Human Mobility is Not Random

06.06.2008
In the cover story in this week’s Nature magazine, Northeastern University physicist Professor Albert-László Barabási and his team found that humans can be characterized based on how they move. In the article, titled “Understanding Individual Human Mobility Patterns,” the authors discuss how, for the first time, they were able to follow individuals in real-time and discovered that despite the diversity of their travel history, humans follow simple reproducible patterns.

In a groundbreaking paper published as a cover story in this week’s Nature magazine, Northeastern University physicist Professor Albert-László Barabási and his team found that humans can be characterized based on how they move.

In the article, titled “Understanding Individual Human Mobility Patterns,” the authors discuss how, for the first time, they were able to follow individuals in real-time and discovered that despite the diversity of their travel history, humans follow simple reproducible patterns.

Barabási, along with co-authors Marta C. González and César A. Hidalgo, studied the trajectory of 100,000 anonymized cell phone users – randomly selected from more than 6 million users – and tracked them for a six-month period. They found that contrary to what the prevailing Lévy flight and random walk models suggest, human trajectories show that while most individuals travel only short distances and a few regularly move over hundreds of miles, they all follow a simple pattern regardless of time and distance, and they have a strong tendency to return to locations they visited before.

“We found that human trajectories show a high degree of temporal and spatial regularity, each individual being characterized by a time-independent characteristic travel distance and a significant probability to return to a few highly frequented locations, like home and work” said Albert-László Barabási, Distinguished Professor of Physics and Director of the Center for Complex Network Research (CCNR) at Northeastern University.

“Our study shows that humans, after only three months of saturated behavior, reach stability in their mobility patterns, and the trajectories become identical,” added Marta C. González, Ph.D. in Physics and Research Assistant at the CCNR. “People devote their time to a few locations, although spending their remaining time in five to 50 places, visited with diminished regularity.”

The location of cell phone users was located every time they received or initiated a call or a text message, allowing Barabási and his team to reconstruct the user’s time-resolved trajectory. In order to make sure that the findings were not affected by an irregular call pattern, the researchers also studied the data set that captured the location of 206 cell phone users, recorded every two hours for an entire week. The two data sets showed similar results, the second validating the first.

The findings of this research complement the notion that human mobility can be generalized by the Lévy flight statistics, as suggested by a 2006 study that found that bank note dispersal is a proxy for human movement. That study analyzed the dispersal of about half-a-million dollar bills in the U.S. and concluded that human travel on geographical scales is an ambivalent and effectively superdiffusive process. By using a different methodology, Barabási’s group was able to find evidence to complement those findings.

“Contrary to bank notes, mobile phones are carried by the same individual during his/her daily routine, offering the best proxy to capture individual human trajectories, said César A. Hidalgo, Ph.D. and Research Assistant at the CCNR. “Also, unlike dollar bills that always follow the trajectory of the current owner and diffuse, humans display significant regularity and do not diffuse.”

“The inherent similarity in travel patterns of individuals could impact all phenomena driven by human mobility, from epidemic prevention to emergency response, urban planning, traffic forecasting and agent-based modeling,” added Barabási.

About Northeastern

Founded in 1898, Northeastern University is a private research university located in the heart of Boston. Northeastern is a leader in interdisciplinary research, urban engagement, and the integration of classroom learning with real-world experience. The university's distinctive cooperative education program, where students alternate semesters of full-time study with semesters of paid work in fields relevant to their professional interests and major, is one of the largest and most innovative in the world. The University offers a comprehensive range of undergraduate and graduate programs leading to degrees through the doctorate in six undergraduate colleges, eight graduate schools, and two part-time divisions.

Renata Nyul | newswise
Further information:
http://www.northeastern.edu

More articles from Physics and Astronomy:

nachricht Hope to discover sure signs of life on Mars? New research says look for the element vanadium
22.09.2017 | University of Kansas

nachricht Calculating quietness
22.09.2017 | Forschungszentrum MATHEON ECMath

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: The pyrenoid is a carbon-fixing liquid droplet

Plants and algae use the enzyme Rubisco to fix carbon dioxide, removing it from the atmosphere and converting it into biomass. Algae have figured out a way to increase the efficiency of carbon fixation. They gather most of their Rubisco into a ball-shaped microcompartment called the pyrenoid, which they flood with a high local concentration of carbon dioxide. A team of scientists at Princeton University, the Carnegie Institution for Science, Stanford University and the Max Plank Institute of Biochemistry have unravelled the mysteries of how the pyrenoid is assembled. These insights can help to engineer crops that remove more carbon dioxide from the atmosphere while producing more food.

A warming planet

Im Focus: Highly precise wiring in the Cerebral Cortex

Our brains house extremely complex neuronal circuits, whose detailed structures are still largely unknown. This is especially true for the so-called cerebral cortex of mammals, where among other things vision, thoughts or spatial orientation are being computed. Here the rules by which nerve cells are connected to each other are only partly understood. A team of scientists around Moritz Helmstaedter at the Frankfiurt Max Planck Institute for Brain Research and Helene Schmidt (Humboldt University in Berlin) have now discovered a surprisingly precise nerve cell connectivity pattern in the part of the cerebral cortex that is responsible for orienting the individual animal or human in space.

The researchers report online in Nature (Schmidt et al., 2017. Axonal synapse sorting in medial entorhinal cortex, DOI: 10.1038/nature24005) that synapses in...

Im Focus: Tiny lasers from a gallery of whispers

New technique promises tunable laser devices

Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...

Im Focus: Ultrafast snapshots of relaxing electrons in solids

Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!

When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...

Im Focus: Quantum Sensors Decipher Magnetic Ordering in a New Semiconducting Material

For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.

Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

“Lasers in Composites Symposium” in Aachen – from Science to Application

19.09.2017 | Event News

I-ESA 2018 – Call for Papers

12.09.2017 | Event News

EMBO at Basel Life, a new conference on current and emerging life science research

06.09.2017 | Event News

 
Latest News

Rainbow colors reveal cell history: Uncovering β-cell heterogeneity

22.09.2017 | Life Sciences

Penn first in world to treat patient with new radiation technology

22.09.2017 | Medical Engineering

Calculating quietness

22.09.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>