Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Life and death of online communities

09.03.2010
The more heterogeneous the community of an online chat channel, the more chances the channel has to survive over time. This has been concluded in a new joint study carried out by researchers of the University of Haifa and the New Jersey Institute of Technology.

“This study has shown that an essentially social characteristic significantly influences the survival chances of an online community,” says Dr. Daphne Raban of the University of Haifa who took part in the study.

The study, headed by Dr. Quentin Jones of the New Jersey Institute of Technology with Dr. Mihai Moldovan of NJIT and Dr. Raban, aimed to examine what factors could best predict the chances of an online community to survive over time. Researchers have previously claimed that there are too many variables influencing the survival or demise of such channels and that there is therefore no way of testing it, and earlier studies have primarily focused on group size and activity.

The current study included an analysis of social characteristics, such as the group’s homogeneity and heterogeneity. A group is considered homogeneous when its member turnover is small - namely, when the members who established the group are still the main members after some time. A group is considered heterogeneous when it has turnover and new members are continuously joining it.

A sample 282 chat channels all “born” on the same month was used for survival analysis which explored the relationship between the overall user activity in each channel at its inception and the channel’s life expectancy. The researchers carried out the survival analysis over the course of six months after “birth”. A chat channel was considered “born” when at least three members had exchanged at least four messages in 20 minutes. It was considered “dead” when it had zero activity for four weeks.

The researchers observed the influences of variables at four points of time: two hours after “birth”; on the channel’s first day of activity; over its first week of activity; and over its first two weeks of activity.

Results show that the variable that best predicts the chances of a community to survive is its level of heterogeneity: the greater the member turnover, the higher the chances that the group will sustain itself over time. On the other hand, the number of members and the number of actual message posters do not predict the chances of survival.

According to the current study, another reliable predictor is the number of messages that are posted between members of an online community. This number does not have much significance over the first two hours of the group’s existence, but the higher the number of messages between members over the following three time phases, the higher the chances of the community’s survival over time. The study also revealed that if the ratio between the number of messages and the number of members in a group remains the same after two weeks of the community’s activity, the chances of “death” are higher, while an irregular ratio predicts survival. It should be noted that neither an increasing ratio of messages between members nor a decreasing ratio were found to influence the chances of survival.

“The present study shows that prediction of an online community’s survival chances cannot be based on quantitative data relating to the size of the group or even to its growth rate alone. A social predictor, on the other hand, can much better predict its chances,” concludes Dr. Raban.

Rachel Feldman | EurekAlert!
Further information:
http://www.haifa.ac.il

More articles from Communications Media:

nachricht Arguments, Emotions, and News distribution in social media - Leibniz-WissenschaftsCampus Tübingen
04.05.2018 | Leibniz-Institut für Wissensmedien

nachricht High Number of Science Enthusiasts in Switzerland
05.02.2018 | Universität Zürich

All articles from Communications Media >>>

The most recent press releases about innovation >>>

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

Im Focus: Superconducting vortices quantize ordinary metal

Russian researchers together with their French colleagues discovered that a genuine feature of superconductors -- quantum Abrikosov vortices of supercurrent -- can also exist in an ordinary nonsuperconducting metal put into contact with a superconductor. The observation of these vortices provides direct evidence of induced quantum coherence. The pioneering experimental observation was supported by a first-ever numerical model that describes the induced vortices in finer detail.

These fundamental results, published in the journal Nature Communications, enable a better understanding and description of the processes occurring at the...

Im Focus: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Rapid water formation in diffuse interstellar clouds

25.06.2018 | Physics and Astronomy

Using tree-fall patterns to calculate tornado wind speed

25.06.2018 | Earth Sciences

'Stealth' material hides hot objects from infrared eyes

25.06.2018 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>