294 research outputs found
Prototypical Implementation of an Intermediary Platform for Context-Sensitive Mobile Marketing Applications
The mobile online medium (i.e. mobile data communication) allows the creation of context-sensitive Mobile Marketing applications by using identity- and context information and thereby enabling the efficient targeting of current user needs. However, existing concepts/implementations do not address the impacts of identity- and context information integration to marketing intermediary platforms which connect mobile users and advertisers. Therefore, this paper describes the latter impacts and documents how they can be considered when designing and implementing of a prototypical Mobile Marketing intermediary platform. Besides showing the feasibility of the concept, the foundation for conducting empirical research (e.g. user acceptance tests) about the young field of context-sensitive Mobile Marketing is provisioned
Generation of 1180 Å period gratings with a Xe ion laser
Holographic lithography with the 2315 Å line of a xenon ion laser is used to produce gratings in polymethylmethacrylate. An 1180 Å period grating is made and examined with a scanning electron microscope (SEM). This grating period is appropriate for use as a first-order grating with a GaAs distributed feedback laser
Mobile device sensing system for urban goods distribution logistics
This paper presents a low cost mobile application
(app) integrated on an Internet of Things (IoT) ecosystem, which
uses varied sensor information collected by mobile devices to
track and assist on the logistics of urban goods distribution
processes. The proposed approach is leveraged by the trend of
decreasing costs for mobile data communication in urban
environments. Taking into account basic sensor data available in
mobile devices (e.g., GPS, accelerometer and magnetometer), it is
possible to track the users’ movements and adopted routes,
identify transit times and driving styles, identify the quality of
roads, and track the process of loading/unloading of urban goods.
This data can also be analyzed through a data mining process to
identify patterns, present driving advice and perform a resource
optimization process.This work has been supported by COMPETE: POCI-01-0145-
FEDER-007043 and FCT – Fundação para a Ciência e
Tecnologia within the Project Scope: UID/CEC/00319/2013.info:eu-repo/semantics/publishedVersio
Analysis of Capacity Limitation in Nigerian GSM Networks and the Effects on Service Providers and Subscribers
The performance of GSM network is measured in terms of KPIs (Key Performance
Indicators) based on statistics generated from the network. The most important of these
performance indicators from the operators’ perspective are BER (bit error rate), the FER
(frame error rate) and the DCR (dropped call rate).
The Dropped Call Rate (DCR) is a measure of the calls dropped in a network as it gives a
quick overview of network quality and revenues lost. This makes it one of the most
important parameters in network optimization. At the frame level in the NMS (Network
Management System), the DCR is measured against the Slow Associated Control Channel
(SACCH) frame. If the SACCH frame is not received, then it is considered to be dropped
calls.
For this work data was acquired form the Network Management System of various GSM
operators in Nigeria (e.g. MTN, Celtel, Globacom etc.). The acquired data was analyzed
to statistically illustrate the extent of revenue that is lost as a result of dropped calls and
the consequent impact on the customers/subscribers
Machining feature-based system for supporting step-compliant milling process
STEP standards aims at setting up a standard description method for product data and providing a neutral exchanging mechanism that is independent of all the information processing systems for product information model. STEP Part 21 is the first implementation method from EXPRESS language and implemented successfully in CAD data. However, this text file consists of purely geometrical and topological data is hardly to be applied in machining process planning which requires machining features enriched data. The aim of this research is developing a new methodology to translate the EXPRESS language model of CAD STEP data into a new product data representation and enriched in machining features which is more beneficial to machining process planning. In this research, a target Database Management System (DBMS) was proposed for developing this system by using its fourth-generation tools that allow rapid development of applications through the provision of nonprocedural query language, reports generators, form generators, graphics generators, and application generators. The use of fourth-generation tools can improve productivity significantly and produce program that are easier to maintain. From this research, a new product data representation in a compact new table format is generated. Then this new product data representation has gone through a series of data enrichment process, such as normal face direction generation, edge convexity/concavity determination and machining features with transition feature recognition. Lastly, this new enriched product data representation is verified by generating to a new STEP standard data format which is according to ISO1030-224 standard format and providing an important part of solution for supporting STEP-compliant process planning and applications in milling process
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A survey of handover algorithms in DVB-H
Digital Video Broadcasting for Handhelds (DVB-H) is a standard for
broadcasting IP Datacast (IPDC) services to mobile handheld terminals.
Based on the DVB-T standard, DVB-H adds new features such as time
slicing, MPE-FEC, in-depth interleavers, mandatory cell id identifier,
optional 4K-modulation mode and the use of 5 MHz bandwidth in addition
to the usually used 6, 7, or 8 MHz raster. IPDC over DVB-H is proposed
for ETSI to complement the DVB-H standard by combining IPDC and
DVB-H in an end-to-end system. Handover in such unidirectional broadcasting
networks is a novel issue. In the last few years since the birth of
DVB-H technology, great attention has been given to the performance
analysis of DVB-H mobile terminals. Handover is one of the main research
topics for DVB-H in mobile scenarios. Better reception quality and greater
power efficiency are considered to be the main targets of handover
research for DVB-H. New algorithms for different handover stages in
DVB-H have been the subject of recent research and are currently being
studied. Further novel algorithms need to be designed to improve the
mobile reception quality. This article provides a comprehensive survey of
the handover algorithms in DVB-H. A systematic evaluation and categorization
approach is proposed based on the problems the algorithms solve
and the handover stages being focused on. Criteria are proposed and analyzed
to facilitate designing better handover algorithms for DVB-H that
have been identified from the research conducted by the author
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