International Journal of Space-Based and Situated Computing (5 papers in press)
Electronic Word Of Mouth on Social Media Websites: Role of Social Capital Theory, Self-Determination Theory, and Altruism
by Saqib Mahmood, Muddasar Ghani Khwaja, Ahmad Jusoh
Abstract: Purchase decisions in recent times are extensively dependent on social media referrals. The effective utilization of social media has become compulsory for the organizations in order to remain competitive. In the emerging markets like Pakistan, promotions through electronic word of mouth on social media have incepted, but still its quite difficult for the organizations to cope-up with the contemporary electronic word of mouth needs. Nevertheless, the Pakistani social media marketing managers are unfamiliar in motivating social media users to engage in electronic word of mouth. For that reason, the current research aims to understand the social capital theory and self determination theory dimensions and altruism role in engaging customers for sharing products and services associated with word of mouth on social media websites. Structural, cognitive, and relational dimensions of social capital are manifested as tie-strength, shared language and trust respectively. Autonomy, competence, and relatedness of self-determination theory are manifested as voluntary self-disclosures, innovativeness, and trust respectively. In order to affirm literary associations among the constructs, structural equation modelling using MPlus was executed on the responses of 550 Pakistani social media users. The outcomes attained manifestly accepted the established hypotheses. Based on these findings theoretical and practical implications are produced.
Keywords: Electronic word of mouth; social capital theory; self-determination theory; altruism; social media websites.
Implementation of an inbound corresponding smartphone application using markerless image processing augmented reality technology
by Tomoyuki Ishida, Hayato Sakamoto
Abstract: We have developed an inbound corresponding smartphone application based on markerless image-processing augmented reality technology for use by zoo visitors and staff. On this application, we implemented an animal quiz distribution function and an animal character hunting function. We also implemented a web system on which the administrator can update the contents handled by these functions in real time. The proposed application negates the need for newly installing multilingual guide boards for foreign zoo visitors. Moreover, the web system enables the realtime updates of the contents used in smartphone applications. Here we confirmed the operability, relevance, readability, applicability, and effectiveness of the mobile application and content management web system in a questionnaire survey of 57 zoo visitors and 14 zoo staff. The survey results of all five measures revealed an overwhelmingly positive response to our mobile application and content management web application.
Keywords: augmented reality; markerless image processing; beacon; inbound; zoo navigation.
Real-Time Simulation of Smart Lightening System in Smart City
by Laiqa Binte Imran, Rana M. Amir Latif, Muhammad Farhan, Tayyaba Tariq
Abstract: Wireless sensor network contains sensors and actuator which send, process and communicate data over the network. In a smart city, the use of wireless sensor network is an emerging technology, and it provides many benefits in terms of communication, energy, and cost. The sensors and actuators embedded in the real environment transform it into a smart environment. Many researchers have developed different solutions for the modeling of smart cities, but still, it needs to be done much more in this area. However, we have focused on energy efficient smart lightening system, which is an essential component of a smart city. In our proposed model we have divided street lights energy usage into three categories: low, moderate and high. The street light energy usage is low in daylight, moderate when average traffic on roads and high when heavy traffic is on roads. Street lights turn on when a vehicle enters in a passage after sensing its entry within a region. A passage is a collection of sensors which detects a vehicle and turn on all lights of the passage based on the wireless sensor network. Smart street lightening system based on light emitting diodes is implemented with a wireless sensor network to reduce energy usage and effective management of the street lightening system. We have deployed our system on street lights with the facility of solar panel so that our devices have more life as in daylight it gets charged, and at night it turned on based on the presence of a vehicle.
Keywords: Smart city; Internet of Things (IoT); Energy management; Lightening system; CupCarbon; Zigbee; Sensors.
Bike sharing systems: a new incentive rebalancing method based on spatial outliers detection
by Yousra Chabchoub, Rayane El Sibai, Christine Fricker
Abstract: Since its launch in 2007, Velib' (the Bike Sharing System -BSS- in Paris) has emerged in the Parisian landscape and has been a model for similar systems in many international cities. Encouraged by public authorities, this ecological mean of transport has an increasing popularity and represents today a significant proportion of human travels in urban environments. A major problem with BSS is the heterogeneity between the stations caused by the attractivity of some stations located in particular areas (working area, proximity to railways station, etc.). In this paper, we focus on spatial outliers stations defined as stations having a behavior significantly different from their neighboring stations: often with much more available bikes or with much more empty docks during the day. We use Moran scatterplot, a well-known method that exploits the similarity between neighbors in order to detect spatial outliers. First, we proposed an improved version of Moran scatterplot, using a robust distance metric called Gower's similarity. We tested the new version of Moran scatterplot on a real dataset issued from the Velib' system to identify the spatial outliers stations. Then, we designed and tested a new method that globally improves the availability of the resources (bikes and docks) in bike stations. This method is motivated by the existence of spatial outliers stations. It relies on a local small change in user behaviors, by adapting their trips to the availability of resources around their departure and arrival stations. Results show that, even with a partial collaboration of the users or a limitation to the rush hours, the proposed method enhances significantly the resource availability in Velib' system.
Keywords: Outliers detection; spatial data mining; Moran scatterplot; Bike Sharing Systems.
A Secure Lightweight Two Factor Authentication
Scheme in Global Mobility Networks
by Madhusudhan R, SUVIDHA KS
Abstract: User authentication is one of the crucial challenges that has to be addressed in
GLObal Mobility NETworks (GLOMONETs) in order to grant the access to the services
in roaming scenario. The authentication schemes proposed so far are susceptible to various security attacks, they also had short comes to achieve security goals. Hence it becomes imperative to design a new authentication scheme which is resilient to the security attacks. In 2016, Gope and Hwang have proposed a scheme, in which they stated that their scheme preserves user anonymity. However with the thorough cryptanalysis of their scheme, we have proved that their scheme is vulnerable to various security attacks like stolen smart card, offine password guessing, MU impersonation and replay attack. Further, the scheme fails to achieve security goals like user anonymity and perfect forward secrecy. To overcome the security attacks of their scheme and to achieve the security goals, a new scheme has been proposed. Through the rigorous informal and formal security analysis, we have demonstrated that the proposed scheme is secure against the security attacks. Furthermore, we have simulated the proposed scheme using widely accepted AVISPA (Automated Validation of Internet Security Protocols and Applications) tool. With the simulated result of the proposed scheme, we show that the proposed scheme is secure against active and passive security attacks. Additionally, the proposed scheme is compared with Gope and Hwang scheme and other related schemes in terms of performance,computational cost and communication overhead. In comparison with other schemes, the proposed scheme is efficient and robust. This makes the proposed scheme suitable for practical implementation.
Keywords: User anonymity; Authentication; Smart-card; Security; Avispa; Ban-logic; GLObal MObility NETworks.