Mobile Content Research Articles

TOWARDS NEW BUSINESS MODELS: STRATEGIES AND PLANNING OF BRAZILIAN STARTUPS IN DIGITAL ENVIRONMENT

The objective of this study is to deepen the understanding of the process of defining strategies and planning of Brazilian startups in a digital environment, in order to create new and innovative business models. The research was applied, with a qualitative and exploratory approach. For that, a semi-structured roadmap was elaborated. Based on the script, two professionals were interviewed in leadership positions in two Brazilian companies, with a broad experience in the digital environment startup market. The first company is a global leader in the development of platforms for commerce and mobile content. The second is one of the largests in the world in the segment of software development and electronic products. From the analysis of the results obtained, this study provides guidelines for the new entrepreneurs and for the new ventures, in what concerns the definition of strategies and the planning of startups in digital environment, towards new business models.

A comparative study of WhatsApp forensics tools

With the increasing number of mobile phones and mobile applications, there is a noticeable rise in cybercrimes. Hence, an urgent need for mobile forensics. Before starting investigation, the investigator should choose one of the acquisition types; physical acquisition, logical acquisition or manual acquisition. The current mobile acquisition tools use these methods to produce an image of the entire mobile content, files of specific datatypes, or data of a certain application. Unfortunately, the resultant output does not facilitate investigating cases related to specific mobile application, since the tool might acquire more than what is needed which requires investigators to filter data manually, or acquire all the application’s data without sufficient analysis. Both cases are effort and time consuming. This study analyzes and compares currently available forensics tools that are designed to extract WhatsApp data only. The comparative study is based on two aspects; National Institute of Standards and Technology (NIST) Mobile Device Tool Test Assertions and researchers’ requirements. The results of the comparative study showed a shortage in the current WhatsApp forensics tools as they do not satisfy all NIST Test Assertions. Additionally, several researchers’ requirements such as: creating projects, comprehensive analysis, applying filters and validating the extracted files, were not met in the studied tools.

UTILIZATION OF BY-PRODUCTS GENERATED BY A WOOD GASIFICATION PLANT THROUGH ITS USE FOR THE RECLAMATION OF DISTURBED TERRAINS

One of the biggest disturbances and pollutants of the environment occur due to the mining industry. For this reason, when talking about the restoration and recultivation of damaged lands and soils a recovery of the disturbed areas affected by mining activities should be first understood. Current waste management trends make us look for opportunities to recultivate disturbed mining areas by using waste or products that have the necessary properties and are a by-product (or waste) of industry. In this study, we have investigated, through laboratory methods, the possibility of using a by-product from a biomass gasification plant (FP) that potentially possesses the properties to improve soils quality during the reclamation process.
 The paper analyzes the possibilities of using the FP by defining its effect on the soil forming process on disturbed sites, including: acidity, content of nutrients and mobility of heavy metals.
 In order to determine the possibility of using the FP to enhance soils quality, in the experiment, we used soils that are going to be used for the reclamation of the Eastern embankment of the Ellatzite copper mine and by-product (FP), generated from a Biomass gasification plant located near the mine.
 The territory that is possible to be reclaimed with FP is an embankment covered with rocks from the Ellatzite mine which has acidic reaction, high content of heavy metals and very low organic content. In general, conditions for land reclamation are severe and specific measures need to be implemented to achieve sustainable results.

PECS: Towards personalized edge caching for future service-centric networks

Mobile operators face the challenge of how to best design a service-centric network that can effectively process the rapidly increasing number of bandwidth-intensive user requests while providing a higher quality of experience (QoE). Existing content distribution networks (CDN) and mobile content distribution networks (mCDN) have both latency and throughput limitations due to being multiple network hops away from end-users. Here, we first propose a new Personalized Edge Caching System (PECS) architecture that employs big data analytics and mobile edge caching to provide personalized service access at the edge of the mobile network. Based on the proposed system architecture, the edge caching strategy based on user behavior and trajectory is analyzed. Employing our proposed PECS strategies, we use data mining algorithms to analyze the personalized trajectory and service usage patterns. Our findings provide guidance on how key technologies of PECS can be employed for current and future networks. Finally, we highlight the challenges associated with realizing such a system in 5G and beyond.

The effect of A-site sublattice order on the electrical properties of Na0.5Bi0.5TiO3 compound

The A-site sublattice order of the Na0.5Bi0.46K0.04TiO2.96 (NBT-K4) compound was changed by the isovalent Na+ ions partly substituting K+ ions. The Na0.5+xBi0.46K0.04−xTiO2.96 (x = 0, 0.01 and 0.02) samples were prepared. By the AC impedance test, the grain conductivity of the Na0.52Bi0.46K0.02TiO2.96 (x = 0.02) samples is 8.23 × 10−4 S/cm at 623 K, which is around 1.65 times higher than that of NBT-K4 sample at the same tested temperature. By anatomizing relaxation spectroscopy, when the Na-doped content x in the NBT-K4 compound increases from 0 to 2 mol%, the activation energy E decreases from 0.64 to 0.57 eV. Accompany with the rise of the Na-doped content in the NBT-K4 compound, although the mobile oxygen vacancy content decreases, the oxygen vacancy diffusivity are strengthened. The higher oxygen vacancy jumping rates and lower oxygen relaxation activation energies were found in the Na-doped NBT-K4 samples, which causes the higher grain conductivity in the Na0.5+xBi0.46K0.04−xTiO2.96 (x = 0.01 and 0.02) samples. There is the higher oxygen-ion conductivity and lower activation energy in the relative A-site order of Na-doped NBT-K4 compound, which is consistent with the first principle simulation results. The investigation provides a new way to design a high oxygen-ion conductivity NBT-based oxide ion conductors and related materials.

Study on New Silver Generation Mobile Content of China - Focus on the User Experience of Mobile Content

With the increase in what is known as the ‘silver wave’, the demand to improve the experience of New Silver Generation mobile content is also increasing. Therefore, it is necessary to provide the New Silver Generation with personalized, refined and convenient services within the mobile content context and to improve their confidence for integration into mobile network life. This study utilizes the Chinese New Silver Generation as subjects and aims to discover a program that effectively enhances their mobile app user experience. Multiple study methods, including document research, data analysis, multivariate research, in-depth interviews, and qualitative research are adopted in this study. By summarizing and researching, it was found that some in the New Silver Generation rely too much on mobile phones due to the excitement brought by the mobile internet world and the emotional loneliness of this group. However, this behavior will greatly influence their physical health. It is also demonstrated that they use WeChat most and that they mainly use the chatting, moment and lucky money functions, indicating that the New Silver Generation mainly uses mobile content to engage in social contact, obtain information and handle life services. Mobile content for New Silver Generation should be designed to be readable and with clearly contrasting layouts, colors, buttons and text to make the interface easy to understand and beautiful. As internet security worries the New Silver Generation the most, the nation, enterprises and individuals should work together to improve the internet environment. The study aims to eliminate the digital divide among the elderly, improve the mobile content application experience for the New Silver Generation and enlarge the market scale of mobile content so as to obtain economic benefits.

Evaluating critical success factors for implementing smart devices in the construction industry

PurposeThe decentralisation of information and high rate of mobile content access in the construction industry provides an ideal scenario for improvement of processes via the implementation of the paradigm of the Internet of Things (IoT). Smart devices are considered as the objects interconnected in the IoT; therefore, they play a fundamental role in the implementation of digital solutions during the execution of construction projects. The purpose of this paper is to assess the critical factors for a successful implementation of smart devices in the construction industry.Design/methodology/approachAn empirical study was performed in the Dominican Republic. This country, located at the heart of the Caribbean, presents an economy that strongly relies on the construction industry. Following a systematic approach, a qualitative data collection and analysis was performed based on semi-structured interviews and content analysis to professionals of construction companies in the Dominican Republic, enquiring the concept of smart devices and critical success factors for implementing the devices in the industry.FindingsThe key success factors obtained from the contestants were leadership, technology awareness, company size, usability of proposed solution, cost of implementation and interoperability.Originality/valueThis paper provides information to clients of the construction sector regarding the benefits of embedding smart devices into their business activities. Furthermore, this study provides a better understanding of the key factors to be considered by construction organisations when embedding smart devices into their projects. This study also provides recommendations for distinct stakeholders of the construction sector, such as policy makers, clients and technology consultants. Policy makers should especially consider factors such as technology awareness and leadership to develop the right policies for the integration of the IoT in construction projects. Technology consultants should be aware of the latest case studies of successful implementation of smart devices and IoT systems in the world in order to adapt and implement smart devices and IoT in their projects.

Caching in Heterogeneous Ultradense 5G Networks: A Comprehensive Cooperation Approach

Rich multimedia services have significantly increased the traffic load over mobile networks. Emerging mobile content caching techniques can efficiently relieve overloaded network traffic by caching popular contents at intermediate nodes and routers. Furthermore, stimulated by network densification, coordinated multipoint (CoMP) joint transmission (JT) techniques are expected to have a significant role in 5G networks. In this article, we present a system architecture for a cache-enabled heterogeneous ultradense network (HUDN) that consists of CoMP-integrated ultradense cells and cluster-based device-to-device (D2D) networks. We propose three cooperative caching schemes in cellular networks, D2D networks, and cross-tier networks. In the proposed schemes, caching decisions will be made by considering the content?s popularity, the device distribution, the transmission method, and the caching capability. Numerical evaluations reveal that the proposed schemes outperform existing ones in terms of delay and cache hit probability.

Use of mobile applications for extending individual vocabulary: content and peculiarities of functioning

Modern information technologies provide new ways of solving a number of practical issues connected with the determination of the volume and content of the modern language individual’s vocabulary. The development of the mobile content market led to the emergence of information and entertainment applications which mobile devices owners can use to extend their vocabulary. These include applications aimed at recognizing and memorizing word meanings, e-dictionaries and e-books, as well as numerouslinguistic games. The article discusses the features of mobile applications which demonstrate the meanings of potential Russian agnonyms (neologisms, special terms, obsolete and rarely used words). The content of such applications is analyzed, their technical potential is assessed, the quality of linguistic information and the manner of its representation are analyzed. On the basis of the author’s own experience conclusions are made about the efficiency of these e-resources in view of the stated goal.

UStash: A Novel Mobile Content Delivery System for Improving User QoE in Public Transport

Mobile data traffic is growing exponentially and it is even more challenging to distribute content efficiently while users are “on the move” such as in public transport. The use of mobile devices for accessing content (e.g., videos) while commuting are both expensive and unreliable, although it is becoming common practice worldwide. Leveraging on the spatial and temporal correlation of content popularity and users’ diverse network connectivity, we propose a novel content distribution system, uStash, which guarantees better QoE with regards to access delays and cost of usage. The proposed collaborative download and content stashing schemes provide the uStash provider the flexibility to control the cost of content access via cellular networks. We model the uStash system in a probabilistic framework and thereby analytically derive the optimal portions for collaborative downloading. Then, we validate the proposed models using real-life trace driven simulations. In particular, we use dataset from 22 inter-city buses running on six different routes and from a mobile VoD service provider to show that uStash reduces the cost of monthly cellular data by approximately 50 percent and the expected delay for content access by 60 percent compared to content downloaded via users’ cellular network connections.

Using Mobile and Web Content to Engage Students with Academic Integrity: The FAIR Project

Using Mobile and Web Content to Engage Students with Academic Integrity: The FAIR Project

Anchor-Less Producer Mobility Management in Named Data Networking for Real-Time Multimedia

Information-centric networking (ICN) is one of the promising solutions that cater to the challenges of IP-based networking. ICN shifts the IP-based access model to a data-centric model. Named Data Networking (NDN) is a flexible ICN architecture, which is based on content distribution considering data as the core entity rather than IP-based hosts. User-generated mobile contents for real-time multimedia communication such as Internet telephony are very common these days and are increasing both in quality and quantity. In NDN, producer mobility is one of the challenging problems to support uninterrupted real-time multimedia communication and needs to be resolved for the adoption of NDN as future Internet architecture. We assert that mobile node’s future location prediction can aid in designing efficient anchor-less mobility management techniques. In this article, we show how location prediction techniques can be used to provide an anchor-less mobility management solution in order to ensure seamless handover of the producer during real-time multimedia communication. The results indicate that with a low level of location prediction accuracy, our proposed methodology still profoundly reduces the total handover latency and round trip time without creating network overhead.

Cryostructuring of Polymeric Systems. 52. Properties, Microstructure and an Example of a Potential Biomedical Use of the Wide-Pore Alginate Cryostructurates.

Wide-pore cryostructurates were prepared via freezing sodium alginate aqueous solutions with subsequent ice sublimation from the frozen samples, followed by their incubation in the ethanol solutions of calcium chloride or sulfuric acid, rinsing, and final drying. Such sequence of operations resulted in the calcium alginate or alginic acid sponges, respectively. The swelling degree of the walls of macropores in such matrices decreased with increasing polymer concentration in the initial solution. The dependence of the degree of swelling on the cryogenic processing temperature had a bell-like character with a maximum for the samples formed at −20 °C. According to 1H NMR spectroscopy, the content of mobile (non-frozen) water in the frozen water-sodium alginate systems also depended on the initial polymer concentration and freezing temperature. The cryostructurates obtained did not lose their integrity in water, saline, in an acidic medium at pH 2 for at least three weeks. Under alkaline conditions at pH 12 the first signs of dissolution of the Ca-alginate sponge arose only after a week of incubation. Microbiological testing of the model depot form of the antibiotics entrapped in the Ca-alginate cryostructurate demonstrated the efficiency of this system as the antibacterial material.

Real-Time Mobile Emotional Content Player Using Smartphone Camera-Based PPG Measurement

A real-time mobile content player was developed that can recognize and reflect emotions in real time using a smartphone. To determine effective awareness, a photoplethysmogram (PPG), which is a biological signal, was measured to recognize emotional changes in users presented with content intended to induce an emotional response. To avoid the need for a separate sensor to measure the PPG, PPG signals were extracted from the red (R) values of images acquired by the rear camera of a smartphone. To reflect an emotion, the saturation (S) and brightness (V) levels, which are related to the ambience of a content, are changed to reflect the emotional changes of the user within the content itself in real time. Arousal- and relaxation-inducing scenarios were conducted to validate the effectiveness. The samplet-test results show that the average peak-to-peak interval (PPI), which is the time interval between the peaks of PPG signals, was significantly low when viewing the content under the arousal-inducing scenario as compared to when watching regular content, and it was determined that the emotion of the user was led to a state of arousal. Ten university students (five males and five females) participated in the experiment. The users had no cardiac disease and were asked not to drink or smoke before the experiment. The average PPI was significantly higher when the content was viewed in the relaxation-inducing scenario compared to regular content, and it was determined that the emotion of the user was induced to a state of relaxation. The designed emotional content player was confirmed to be an interactive system, in which the video content and user concurrently affect each other through the system.

A mobile multimedia content handoff scheme based on proxy mobile IPv6 for VR/AR

This paper proposes a novel mobile multimedia content handoff scheme for a content delivery network (CDN) based on proxy mobile IPv6 (PMIPv6). PMIPv6 is a network-based mobility management protocol. In PMIPv6, when a mobile node (MN) that is currently receiving content from one domain moves into neighboring domain, it can maintain its existing session seamlessly. However, when the MN moves continuously, the content delivery path may become long, potentially leading to heavy network traffic and degradation of the quality of service (QoS) through delay and jitter. The proposed handoff scheme (PMIPv6-CDN Handoff) selects an optimal content server as a mobile node (MN) moves in a handoff and receives content. This scheme offers several benefits such as routing path optimization and a reduced transmission delay. Therefore, it can be applied to virtual reality (VR) and augmented reality (AR) services, which are sensitive to transmission delay.

Study on the Valuation Model of Mobile Content Start-ups Using Resource based View and Real Options Perspective

Study on the Valuation Model of Mobile Content Start-ups Using Resource based View and Real Options Perspective

Augmented reality application for location finder guidance

<p>Finding directions to a specific location can be troublesome especially when we are not familiar with a new area. Conventionally, we may want to ask people around or possibly we use Global Positioning System (GPS) navigator. However, using GPS navigator may not be the best solution if the address is not entered accurately. Therefore, this paper presents an augmented reality (AR) application for location finder guidance. Instead, a user is only required to scan the address indicated on a surface such as card or flyer using smart phone camera.The proposed application has utilized various components of AR technology including multiple image target, virtual button and markerless features. The development of the AR application follows phases of activities in Multimedia Mobile Content Development (MMCD) model. The proposed application is found to be very interactive and convenient in finding directions to specific location.</p>

Handover-Aware Content Replication for Mobile-CDN

This letter proposes a handover-aware content replication mechanism for mobile content delivery networks. This mechanism allows us to select the most optimal surrogate servers and assign these to the mobile clients through built-in tables. The optimal surrogate selection process begins by predicting the mobility of clients through Gauss-Markov model. Then, it continues with server modeling based on G/G/1 queuing system for load estimation. We also use the k -order autoregressive model to observe the future values of the estimated loads. The proposed strategy reduces the content replication delays and packet losses by 53% and 42%, respectively.

EVALUASI PEMANFAATAN MOBILE MARKETING BERBASIS ANDROID DENGAN MENGGUNAKAN METODE BUYER BLACKBOX PADA PERUSAHAAN RETAIL DI JAKARTA

The increasing use of smartphones in the world causes mobile marketing to be one of the most considered marketing methods. Indonesia is one of the countries with a large number of mobile device users. This has resulted in increasingly frequent access to mobile content which ultimately has greater potential to innovate in mobile marketing. Based on these conditions, we are very interested in conducting research with the theme of mobile marketing with the aim and our long-term goal is to be able to add to our scientific insights in the field of digital marketing or commonly referred to as e-commerce. While our specific target is to help business people to easily understand and use mobile marketing in their marketing strategies. In this study we will use the black box method with tools such as questionnaires and interviews. The purpose of using this questionnaire and interview is to survey smartphone users and business people so that we can find out whether the mobile marketing that has been used in the business contributes to the company's income. Then we give a limit to the success of the results of the questionnaire. So that we get evaluation results that can be used as material for comparison and learning for business people in particular and for us in general.

Mineral fertilizers with iron influence spring rape, maize and soil properties

ABSTRACTBecause of low content of available iron (Fe) in soils and its poor mobility in plants, iron fertilization is necessary. Different forms of iron (mineral salts, chelates, nanomaterials) and fertilization strategies (soil and foliar application of solid or liquid fertilizers) are used. The effect of solid mineral fertilizers (A: a mixture of ammonium nitrate and dolomite; B: a mixture of ammonium nitrate and sulfate) enriched with iron sulfate was assessed during a three-year pot experiment. Iron addition did not change the yield of spring rape (first year) or maize (second and third year) significantly, and the effect on iron content in the plants was ambiguous. Fertilizer B with iron had the greatest yield-forming effect, increasing the yield of aboveground parts by 355–874%, and of roots by 211–692% in particular years. All fertilizers (especially containing sulfur) acidified the soil. After the experiment, pH of the soil fertilized with sulfur was 4.1, and of the unfertilized soil – 5.2. Iron addition increased the content of mobile and exchangeable iron in the soil by 12–110% and 2–58%, respectively, but not the content of the fraction bound to MnOx. Combination of sulfur and iron fertilization has a potential to improve soil abundance and plant yield.