4,142 research outputs found
MobiStreams: A Reliable Distributed Stream Processing System for Mobile Devices
Multi-core phones are now pervasive. Yet, existing applications rely predominantly on a client-server computing paradigm, using phones only as thin clients, sending sensed information via the cellular network to servers for processing. This makes the cellular network the bottleneck, limiting overall application performance. In this paper, we propose Mobi Streams, a Distributed Stream Processing System (DSPS) that runs directly on smartphones. Mobi Streams can offload computing from remote servers to local phones and thus alleviate the pressure on the cellular network. Implementing DSPS on smartphones faces significant challenges: 1) multiple phones can readily fail simultaneously, and 2) the phones' ad-hoc WiFi network has low bandwidth. Mobi Streams tackles these challenges through two new techniques: 1) token-triggered check pointing, and 2) broadcast-based check pointing. Our evaluations driven by two real world applications deployed in the US and Singapore show that migrating from a server platform to a smartphone platform eliminates the cellular network bottleneck, leading to 0.78~42.6X throughput increase and 10%~94.8% latency decrease. Also, Mobi Streams' fault tolerance scheme increases throughput by 230% and reduces latency by 40% vs. prior state-of-the-art fault-tolerant DSPSs
Experience Report on the Challenges and Opportunities in Securing Smartphones Against Zero-Click Attacks
Zero-click attacks require no user interaction and typically exploit zero-day
(i.e., unpatched) vulnerabilities in instant chat applications (such as
WhatsApp and iMessage) to gain root access to the victim's smartphone and
exfiltrate sensitive data. In this paper, we report our experiences in
attempting to secure smartphones against zero-click attacks. We approached the
problem by first enumerating several properties we believed were necessary to
prevent zero-click attacks against smartphones. Then, we created a security
design that satisfies all the identified properties, and attempted to build it
using off-the-shelf components. Our key idea was to shift the attack surface
from the user's smartphone to a sandboxed virtual smartphone ecosystem where
each chat application runs in isolation. Our performance and usability
evaluations of the system we built highlighted several shortcomings and the
fundamental challenges in securing modern smartphones against zero-click
attacks. In this experience report, we discuss the lessons we learned, and
share insights on the missing components necessary to achieve foolproof
security against zero-click attacks for modern mobile devices
Intelligent alarm system for hospitals using smartphone technology
During the last decade, attention was paid to detect the accident and call the ambulance as soon as possible, the situation was neglected after the arrival of the patient to the specified service point. This negligence led to an increase in the mortality rate, especially where the highest percentage of deaths occurred during the first hour after the accident. This highest Mortality can be avoided by providing proper health care after the arrival of the patient to the hospital, the proposed system reduces the rescue time after the arrival of a patient to the hospital, and it requires each hospital to be endowed with a reception model responsible for detecting and reporting accident situations to the emergency service. It was be found that there is an urgent need for a web-based hospital management system with a mobile web service to respond immediately to incidents in the event of an accident. This system utilizes the Android phone application to connect to the server for transferring the specified data to the hospital and it can be used for comprehensive accident analysis and management. In this paper, a combination of Android phone application, database, and visual studio 2012 was used to develop the system
Call for Paper Information Broadcast Based on Android Application
A reliable information is a crucial thing in every event. Participants and the committee expect the fulfillment of information. In this research, writers use smartphone technology to facilitate call for paper information broadcast. The development of call for paper information broadcast application is based on the usage of Android smartphones that are relatively popular device to be used by the people in this era. On this application, there are some features that can facilitate the users to get the best reading experience. This application also grants the committee some rights to manage the event through website. The design and development of this application are going through three phases. Analysis, interface design, and code writing. The website is based on HTML 5 and the mobile application is based on Ionic Framework for smartphone application based on Android, and MySQL as database manager and also a test conducted through automatic email, SMS gateway, and push notification on smartphone. In this research, a call for paper application was developed to facilitate information broadcast. The application helps the participants to get information through SMS, notification, and email from their smartphone. After going through the testing process, this application can run their features inside the application smoothly
EmergenSIG: an integrated location-based system for emergency management
Several solutions have been proposed for emergencies scenarios. These solutions include real-time data communication, location-aware, coordination, and decision-making support systems. In this context, this dissertation presents a location-awareness system fully oriented to emergency scenarios, called EmergenSIG. This approach provides and gathers important field information from an occurrence (emergency situation) and shares it to all the different agents. They include police, firefighters, medical emergency teams, among others, mobilized to the same operations theater (OT). Therefore, allowing a faster and integrated response to all the involved agents, enhancing the emergency management of the occurrence. The core of this proposal is based on a low cost solution oriented to the agents on the field (EmergenSIG mobile application), which interacts with the EmergenSIG Web application, oriented to the civil protection entities, through REST Web services. EmergenSIG focuses on medical emergencies and wildfires. It was evaluated and demonstrated in different mobile devices considering different screen sizes following a usercentered design. The system was also been evaluated and validated by real entities and civil protection agents on simulated emergency scenarios.Várias soluções têm sido propostas para cenários de emergências
médicas . Estas soluções incluem comunicações de dados em tempo real
,sensíveis á localização , coordenação e sistemas de apoio à tomada de
decisão. Neste contexto, esta dissertação apresenta um sistema sensível à
localização totalmente orientada para cenários de emergência, chamada
EmergenSIG. Esta abordagem proporciona e reúne importantes informações
de uma ocorrência (situação de emergência) compartilhando-a para todos
os diferentes agentes. Nos quais se incluem a polícia, bombeiros, equipas
de emergência médica, entre outros, que se mobilizaram para o mesmo
teatro de operações (TO). Portanto, permite uma resposta mais rápida e
integrada para todos os agentes envolvidos, aumentando a eficácia da
gestão da emergência de uma ocorrência. O cerne desta proposta é
baseada numa solução de baixo custo direcionada para os agentes no
terreno (aplicação móvel EmergenSIG), que interage com o aplicativo Web
EmergenSIG, orientada para as entidades da proteção civil, através de
serviços Web REST. O EmergenSIG centra-se em emergências médicas e
incêndios florestais. Foi avaliada e demonstrada em diferentes dispositivos
móveis, considerando diferentes tamanhos de ecrã e seguindo um design
centrado no utilizador. O sistema também foi avaliado e validado por
entidades reais e agentes da proteção civil em cenários de emergência
simulados
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