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Stockhammer, Thomas, Jürgen Heiles, and Joachim Lüken. "DVB-IPTV content download services—overview and use cases." Multimedia Tools and Applications 53, no. 3 (March 30, 2010): 533–55. http://dx.doi.org/10.1007/s11042-010-0505-3.
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Horák, Jiří, Jan Růžička, and Jiří Ardielli. "Performance Testing of Download Services of COSMC." Geoinformatics FCE CTU 10 (November 30, 2013): 5–14. http://dx.doi.org/10.14311/gi.10.1.
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The paper presents results of performance tests of download services of Czech Office of Surveying, Mapping and Cadastre according to INSPIRE requirements. Methodology of testing is explained, including monitoring performance of reference servers. 26 millions of random requests were generated for each monitored operation, layer and coordinate system. The temporal development of performance indicators are analyzed and discussed. Results of performance tests approve the compliance with INSPIRE qualitative requirements for download services. All monitored services satisfy requirements of latency, capacity and availability. The latency and availability requirements are fulfilled with an abundant reserve. No problems in structure and content of responses were detected.
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OBrien, Patrick, Kenning Arlitsch, Jeff Mixter, Jonathan Wheeler, and Leila Belle Sterman. "RAMP – the Repository Analytics and Metrics Portal." Library Hi Tech 35, no. 1 (March 20, 2017): 144–58. http://dx.doi.org/10.1108/lht-11-2016-0122.
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Purpose The purpose of this paper is to present data that begin to detail the deficiencies of log file analytics reporting methods that are commonly built into institutional repository (IR) platforms. The authors propose a new method for collecting and reporting IR item download metrics. This paper introduces a web service prototype that captures activity that current analytics methods are likely to either miss or over-report. Design/methodology/approach Data were extracted from DSpace Solr logs of an IR and were cross-referenced with Google Analytics and Google Search Console data to directly compare Citable Content Downloads recorded by each method. Findings This study provides evidence that log file analytics data appear to grossly over-report due to traffic from robots that are difficult to identify and screen. The study also introduces a proof-of-concept prototype that makes the research method easily accessible to IR managers who seek accurate counts of Citable Content Downloads. Research limitations/implications The method described in this paper does not account for direct access to Citable Content Downloads that originate outside Google Search properties. Originality/value This paper proposes that IR managers adopt a new reporting framework that classifies IR page views and download activity into three categories that communicate metrics about user activity related to the research process. It also proposes that IR managers rely on a hybrid of existing Google Services to improve reporting of Citable Content Downloads and offers a prototype web service where IR managers can test results for their repositories.
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Baua'a, Mustapha Mohammed. "Parallelizing Web Service Upload \ Download files." International Journal of Advanced Research in Computer Science and Software Engineering 8, no. 3 (March 30, 2018): 15. http://dx.doi.org/10.23956/ijarcsse.v8i3.563.
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The I\O file system Read\Write operations are considered the most significant characteristics. Where, many researchers focus on their works on how to decrease the response time of I\O file system read\write operations. However, most articles concentrate on how to read\write content of the file in parallelism manner. Here in this paper, the author considers the parallelizing Read\Write whole file bytes not only its contents. A case study has been applied in order to make the idea more clear. It talks about two techniques of uploading\downloading files via Web Service. The first one is a traditional way where the files uploaded and downloaded serially. While the second one is uploaded\ downloaded files using Java thread in order to simulate parallelism technique. Java Netbeans 8.0.2 have been used as a programming environment to implement the Download\Upload files through Web Services. Validation results are also presented via using Mat-lab platform as benchmarks. The visualized figures of validation results are clearly clarifying that the second technique shows better response time in comparison to the traditional way.
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Fraile, Francisco, Ismael de Fez, and Juan Carlos Guerri. "Evaluation of Background Push Content Download Services to Mobile Devices Over DVB Networks." IEEE Transactions on Broadcasting 60, no. 1 (March 2014): 1–15. http://dx.doi.org/10.1109/tbc.2013.2289639.
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de Fez, I., F. Fraile, R. Belda, and J. C. Guerri. "Analysis and Evaluation of Adaptive LDPC AL-FEC Codes for Content Download Services." IEEE Transactions on Multimedia 14, no. 3 (June 2012): 641–50. http://dx.doi.org/10.1109/tmm.2012.2190392.
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Schrimpsher, Dan, and Letha Etzkorn. "A model to predict quality of a reduced ontology for Web service discovery on mobile devices." Knowledge Engineering Review 29, no. 2 (March 2014): 201–16. http://dx.doi.org/10.1017/s0269888914000071.
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AbstractAs Web Services and the Semantic Web become more important, enabling technologies such as Web service ontologies will grow larger. At the same time, use of mobile devices to access Web services has doubled in the last year. The ability of these resource-constrained devices to download and reason across ontologies to support service discovery are severely limited. Since concrete agents typically only needs a subset of what is described in a Web service ontology to complete their task, a reduced ontology can be created. Measuring the quality of a reduced ontology, in both knowledge content and performance, is a nontrivial task. Expert analysis of the ontologies is time-consuming and unreliable. We propose two measures of knowledge content and performance. Mean average recall (MAR) with respect to the original ontology compares the data returned from a series of queries related to a particular concept of interest. Mean average performance (MAP) compares the download and reasoning speedup of the reduced ontology with respect to the original ontology. Neither of these values can be computed easily, therefore we propose a set of ontology metrics to predict these values. In this paper, we develop two prediction models for MAR and MAP based on these metrics. These models are based on analysis of 23 ontologies from five domains. To compute MAR, a specific set of queries for each domain was applied to each candidate reduced ontology along with the original ontology. To compute MAP, a simulated mobile device will download and process of each ontology along with the original ontology. We believe this model allows a speedy selection of a reduced ontology that contains the knowledge content and performance speedup needed by a mobile device for service discovery.
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Guo, Ya Jun, Yan Quan Liu, and Arlene Bielefield. "The Provision of Mobile Services in US Urban Libraries." Information Technology and Libraries 37, no. 2 (June 18, 2018): 78–93. http://dx.doi.org/10.6017/ital.v37i2.10170.
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To determine the present situation regarding services provided to mobile users in US urban libraries, the authors surveyed 138 Urban Libraries Council members utilizing a combination of mobile visits, content analysis, and librarian interviews. The results show that nearly 95% of these libraries have at least one mobile website, mobile catalog, or mobile app. The libraries actively applied new approaches to meet each local community’s remote-access needs via new technologies, including app download links, mobile reference services, scan ISBN, location navigation, and mobile printing. Mobile services that libraries provide today are timely, convenient, and universally applicable.
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Gessa, Ana, Amor Jiménez, and Pilar Sancha. "Open Innovation in Digital Healthcare: Users’ Discrimination between Certified and Non-Certified mHealth Applications." Journal of Open Innovation: Technology, Market, and Complexity 6, no. 4 (November 1, 2020): 130. http://dx.doi.org/10.3390/joitmc6040130.
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Mobile applications users consider it especially important to have quality certification, and particularly in an e-health context. However, if the app is certified, will user satisfaction be greater? This paper is intended to help answer that question. Therefore, with user satisfaction as a determinant of the quality of services, the purpose of the paper is to understand the extent to which certified and non-certified mHealth apps influence user experience. This was measured by online reviews and downloads. An empirical study was carried out with 50 mHealth apps (21 certified, 29 non-certified), which is a convenient sampling procedure. The Mahalanobis matching technique was used to test for significant differences between the groups. A comparative content analysis was performed on 6188 user comments and on app downloads. Non-parametric tests were preferred because the variables analyzed had a categorical structure. A log-linear model and advanced contingency tables were used to examine the more than two-way relationships of variables. The results show differences between the two samples (certified and non-certified mHealth apps). However, quality certification labels as a guarantee of the quality of apps do not have a modulating effect on the online reviews and downloads relationship. The model showed a statistically significant partial association between “certification” and “online user reviews” (Z = 2.174; sig = 0.042)] and between “download” and “online user reviews” (Z = 2.387; sig = 0.017).
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Lee, Yunjin, Mingyu Lim, and Yangchan Moon. "Application-level Communication Services for Development of Social Networking Systems." International Journal of Electrical and Computer Engineering (IJECE) 5, no. 3 (June 1, 2015): 586. http://dx.doi.org/10.11591/ijece.v5i3.pp586-598.
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In this paper, we present our communication middleware (CM), which is designed to reduce the effort of developing common communication functionalities for social networking services (SNSs) in the client-server model. SNS developers can apply the application-level communication services of CM both to an SNS server and to client applications simply by calling application programming interfaces (APIs) and configuring various options related to communication services. CM was developed to enable SNS developers to easily build fundamental services such as transmission of a user-defined event, user membership and authentication management, friend management, content upload and download with different numbers of attachments, chat management, and direct file transfer. All of the communication services also provide options that a developer can customize according to his or her SNS requirements.
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Lee, Nam-Yong, Jinhong Yang, and Chul-Soo Kim. "Blockchain-Based Smart Propertization of Digital Content for Intellectual Rights Protection." Electronics 10, no. 12 (June 9, 2021): 1387. http://dx.doi.org/10.3390/electronics10121387.
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Several platform companies have been successful in competing with digital piracy by producing consumer-friendly services. Nowadays, however, the digital content service market has become more monopolized than ever, which forms barriers to the entry of new platform companies. The platform monopoly would cause considerable problems both to content providers and consumers as it limits the choice of consumers. To remove the platform monopoly in digital content markets, we propose a public blockchain-based digital content service method. The proposed method encrypts the digital content to a self-decryptable form, which we call Smart Propertized Digital Content (SPDC), and utilizes the decentralization and traceability of the public blockchain to provide a non-monopolistic ecosystem for the management and distribution of the SPDC license. The proposed method can be more beneficial both to content creators and users than the current winner-takes-all platform model. For instance, users can download SPDC once and play many times without requesting the decryption key, and SPDC owners can make SPDC licenses to be time-limited, device-limited, resellable, or terminated without resorting to help from other intermediaries. We conducted the threat analysis on the proposed method by examining possible attacks in various scenarios. Based on threat analysis, we conclude that the proposed method can provide a new type of digital content service ecosystem that can be operated in a completely decentralized way and neutrally beneficial to all participants.
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Sartika, Dewi, and Ricky Noor Permadi. "Pemanfaatan open access Jurnal Borneo Administrator melalui pengukuran kepuasan pembaca di Lembaga Administrasi Negara." Jurnal Kajian Informasi & Perpustakaan 8, no. 2 (December 30, 2020): 191. http://dx.doi.org/10.24198/jkip.v8i2.26448.
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Open Access Journal (OAJ) is a journal publication that contains articles in full text and user’s can be accessed and used free of charge. The purpose of this study was to determine the extent to which open access was used in the Borneo Administrator Journal (JBA) by measuring reader satisfaction. The research method used was a descriptive quantitative approach. The data collection used a survey method and a data analysis technique used a simple descriptive statistical method. This research has eight research questions, namely the level of user’s satisfaction with access and download facilities, Kemenristek/Dikti accreditation, language, benefit for the profession and career advancement, number of articles and columns, overall format and content, issued quarterly (3x a year), and services provided by JBA managers. The research data analysis has the three highest indicators were published every quarter (3x a year), the format and content as a whole, and were beneficial for professional and career advancement. The lowest score indicators but still in the satisfied category were download facilities, language, and the number of articles and columns. In conclusion, the overall level of reader satisfaction is in the satisfied category. The implementation of open access in the Borneo Administrator Journal is basically to support the development and dissemination of knowledge.
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Branca, Giovanni, Thomas Schierl, and Luigi Atzori. "Theoretical Models for Video on Demand Services on Peer-to-Peer Networks." International Journal of Digital Multimedia Broadcasting 2009 (2009): 1–8. http://dx.doi.org/10.1155/2009/263936.
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Peer-to-peer networks (P2Ps) are becoming more and more popular in video content delivery services, such as TV broadcast and Video on Demand (VoD), thanks to their scalability feature. Such characteristic allows for higher numbers of simultaneous users at a given server load and bandwidth with respect to alternative solutions. However, great efforts are still required to study and design reliable and QoS-guaranteed solutions. In this paper, within the scenario of P2P-based VoD services, we study the phenomenon of peer churns and propose four models of the peer behaviour to evaluate its impact on the system performance, which are based on the Gilbert-Elliot chain, the fluidic representation of the user behavior, and a queuing analysis of the system. The models are compared by computing the resources the system has to add on top of the P2P network to satisfy all the download requests. Simulations show important relationships between playback buffer length, peer request rate, peer average lifetime, and server upload rate.
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HALVORSEN, PÅL, TOM ANDERS DALSENG, and CARSTEN GRIWODZ. "ASSESSMENT OF LINUX' DATA PATH IMPLEMENTATIONS FOR DOWNLOAD AND STREAMING." International Journal of Software Engineering and Knowledge Engineering 17, no. 04 (August 2007): 465–81. http://dx.doi.org/10.1142/s0218194007003343.
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Distributed multimedia streaming systems are increasingly popular due to technological advances, and numerous streaming services are available today. On servers or proxy caches, there is a huge scaling challenge in supporting thousands of concurrent users that request delivery of high-rate, time-dependent data like audio and video, because this requires transfers of large amounts of data through several sub-systems within a streaming node. Unnecessary copy operations in the data path can therefore contribute significantly to the resource consumption of streaming operations. Despite previous research, off-the-shelf operating systems have only limited support for data paths that have been optimized for streaming. Additionally, system call overhead has grown with newer operating systems editions, adding to the cost of data movement. Frequently, it is argued that these issues can be ignored because of the continuing growth of CPU speeds. However, such an argument fails to take problems of modern streaming systems into account. The dissipation of heat generated by disks and high-end CPUs is a major problem of data centers, which would be alleviated if less power-hungry CPUs could be used. The power budget of mobile devices, which are increasingly used for streaming as well, is tight, and reduced power consumption an important issue. In this paper, we prove that these operations consume a large amount of resources, and we therefore revisit the data movement problem and provide a comprehensive evaluation of possible streaming data I/O paths in the Linux 2.6 kernel. We have implemented and evaluated several enhanced mechanisms and show how to provide support for more efficient memory usage and reduction of user/kernel space switches for content download and streaming applications. In particular, we are able to reduce the CPU usage by approximately 27% compared to the best approach without kernel modifications, by removing copy operations and system calls for a streaming scenario in which RTP headers must be added to stored data for sequence numbers and timing.
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Zou, Hua, Jin Xuan Hou, Rong Heng Lin, and Fang Chun Yang. "A Locality-Aware Peer Searching Scheme to Support VCR Functions in a Mesh-Based P2P VoD System." Advanced Materials Research 219-220 (March 2011): 1008–11. http://dx.doi.org/10.4028/www.scientific.net/amr.219-220.1008.
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With the wide penetration of broadband access, it is desirable to provide supporting user interactivity services such as Video-on-Demand (VoD). However, this introduces a challenge on how to efficiently support Video Cassette Recording (VCR) functions for VoD services in Peer-to-Peer (P2P) network. In this paper, we propose a locality-aware peer searching algorithm, called LAPS. In LAPS, peers are distributed in various areas by its physical location. For each peer, it could implement relocation of forward seek based on neighbors’ and trackers’ information. To decrease the backbone load, LAPS dedicated to download media content from local area. We explore several key issues in LAPS including overlay organization, three various situations of forward seek with neighbor circle. We evaluate its performance through simulations and compare it with existed system. The results show that LAPS is superior to a previous scheme in terms of latency and backbone load.
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Subirats, Laia, Natalia Reguera, Antonio Bañón, Beni Gómez-Zúñiga, Julià Minguillón, and Manuel Armayones. "Mining Facebook Data of People with Rare Diseases: A Content-Based and Temporal Analysis." International Journal of Environmental Research and Public Health 15, no. 9 (August 30, 2018): 1877. http://dx.doi.org/10.3390/ijerph15091877.
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This research characterized how Facebook deals with rare diseases. This characterization included a content-based and temporal analysis, and its purpose was to help users interested in rare diseases to maximize the engagement of their posts and to help rare diseases organizations to align their priorities with the interests expressed in social networks. This research used Netvizz to download Facebook data, word clouds in R for text mining, a log-likelihood measure in R to compare texts and TextBlob Python library for sentiment analysis. The Facebook analysis shows that posts with photos and positive comments have the highest engagement. We also observed that words related to diseases, attention, disability and services have a lot of presence in the decalogue of priorities (which serves for all associations to work on the same objectives and provides the lines of action to be followed by political decision makers) and little on Facebook, and words of gratitude are more present on Facebook than in the decalogue. Finally, the temporal analysis shows that there is a high variation between the polarity average and the hour of the day.
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Favario, Leonardo, and Enrico Masala. "A New Architecture for Cross-Repository Creation and Sharing of Educational Resources." International Journal of Emerging Technologies in Learning (iJET) 12, no. 02 (February 28, 2017): 185. http://dx.doi.org/10.3991/ijet.v12i02.6058.
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A large amount of educational resources are currently available in the Internet, covering educational needs for many school grades. However, using such wealth of material, typically dispersed in several repositories, in a simple and effective way, is rather challenging due to the difficulties encountered by teachers in learning the peculiar access and operational procedures that each repository system requires. Therefore, it is important to provide the teachers with a centralized, integrated, simple system that can address most of their needs so that every operation (search, edit, share, download) can be done from a single location. This work follows this direction by designing and presenting both an architecture to integrate different repository systems using the Content Management Interoperability Services (CMIS) API and an integration layer that provides a simple web interface suitable for the needs of both the content creators (teachers) and the users of the contents (learners). Results have been evaluated both quantitatively, i.e., using performance indicators such as response time, and qualitatively, on the basis of the user experience evaluated through a questionnaire. Both type of results show that the platform adequately addresses user needs therefore it has the potential to be embraced by a large user community.
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Sensuse, Dana Indra, and Sigit Hadi Prayoga. "ANALISIS USABILITY PADA APLIKASI BERBASIS WEB DENGAN MENGADOPSI MODEL KEPUASAN PENGGUNA (USER SATISFACTION)." Jurnal Sistem Informasi 6, no. 1 (July 15, 2012): 70. http://dx.doi.org/10.21609/jsi.v6i1.278.
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Iklim persaingan antar perusahaan telekomunikasi yang saat ini semakin kuat sangat terkait dengan mekanisme perusahaan dalam memberikan layanan purna jual atas jasa yang diberikan serta bagaimana perusahaan dapat membuka hubungan langsung dengan pelanggannya. Perusahaan membangun suatu cara yang dapat menjaga loyalitas pelanggannya. Pendekatan tren teknologi yang dapat menyajikan layanan ini adalah melalui CRM (Customer Relationship Management). Analisis usability pada aplikasi berbasis web dengan mengadopsi model penerimaan pengguna aplikasi, difokuskan pada analisis aspek usability pengguna yang bertindak sebagai pelanggan yang menikmati produk dan layanan suatu perusahaan. Saat ini, sudah cukup banyak teori model penerimaan pengguna terhadap suatu aplikasi. Salah satunya adalah dengan model kepuasan pengguna (User Satisfaction). Pengumpulan data dilakukan dengan survei kepuasan pengguna terhadap aplikasi. Berdasar pada landasan teori yang ada, uji statistik pada model kepuasan pengguna memanfaatkan teori Structural Equation Model (SEM) dan perangkat lunak LISREL 8.80. Hasil penelitian menemukan beberapa kaitan antara variabel laten pengukuran dengan variabel lainnya.Penelitian ini secara khusus menemukenali pula bahwa sajian content memberikan pengaruh positif secara signifikan terhadap kepuasan pengunjung website, dibanding aspek Ease of Use, Customization dan Download Delay. Hasil penelitian juga menghasilkan rekomendasi perbaikan atas aplikasi yang diharapkan dapat meningkatkan kemanfaatan (usability) aplikasi. The Atmosphere of competition among telecommunications companies that are currently growing strongly associated with the mechanism of the company in providing after-sales service for services given and how the company can open a direct relationship with customers. Company builds a way that can keep the loyalty of its customers. Approach to technology trends that can provide these services are through the CRM (Customer Relationship Management). Analysis of usability in web-based applications by adopting a model of user acceptance of applications, focused on the analysis of usability aspects of the user who acts as the customer who enjoys the company's products and services. Currently, there are some theoretical models of user acceptance of an application. One way is to model user satisfaction (User Satisfaction). The data was collected with a user satisfaction survey of the application. Based on the existing foundation theory, statistical tests on the model of user satisfaction utilizing the theory of Structural Equation Model (SEM) and LISREL 8.80 software. The study found some association between the latent measurements variables with other variables. This study specifically identifies that the content provided also provides a significantly positive influence on satisfaction of website visitors, than the aspect of Ease of Use, Customization and Download Delay. The results also generate recommendations for improvement for applications that are expected to increase the usefulness (usability) applications.
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KING, GARY, JENNIFER PAN, and MARGARET E. ROBERTS. "How Censorship in China Allows Government Criticism but Silences Collective Expression." American Political Science Review 107, no. 2 (May 2013): 326–43. http://dx.doi.org/10.1017/s0003055413000014.
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We offer the first large scale, multiple source analysis of the outcome of what may be the most extensive effort to selectively censor human expression ever implemented. To do this, we have devised a system to locate, download, and analyze the content of millions of social media posts originating from nearly 1,400 different social media services all over China before the Chinese government is able to find, evaluate, and censor (i.e., remove from the Internet) the subset they deem objectionable. Using modern computer-assisted text analytic methods that we adapt to and validate in the Chinese language, we compare the substantive content of posts censored to those not censored over time in each of 85 topic areas. Contrary to previous understandings, posts with negative, even vitriolic, criticism of the state, its leaders, and its policies are not more likely to be censored. Instead, we show that the censorship program is aimed at curtailing collective action by silencing comments that represent, reinforce, or spur social mobilization, regardless of content. Censorship is oriented toward attempting to forestall collective activities that are occurring now or may occur in the future—and, as such, seem to clearly expose government intent.
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Mackay, K., H. Kelly, M. Clemence, and R. Penford. "AB1347-HPR DIGITAL SOLUTIONS TO AID SELF-MANAGEMENT: DEVELOPING A RHEUMATOLOGY APP FOR USE BY ANY PATIENT ATTENDING OUR DEPARTMENT." Annals of the Rheumatic Diseases 79, Suppl 1 (June 2020): 1961.2–1962. http://dx.doi.org/10.1136/annrheumdis-2020-eular.5635.
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Background:Managing complex rheumatological conditions requires information about the disease itself, treatments regimes and side effects. This is particularly important for those with a new diagnosis.A local patient focus group identified the need for trustworthy information, written and reviewed by their rheumatology team to aid self-management. They felt information should be readily accessible, in one place, to re-read / re-listen to, as required.Objectives:To develop a Rheumatology App, for any patient attending our department, to support self-management.Methods:We worked with a number of rheumatology patients, of differing ages, the Rheumatology multi-disciplinary team (MDT) and an industry partner, hci.digital, to develop our App, called ‘Rheumatology Connect’.We developed over 30 short videos, provided links to other valuable patient websites e.g. Versus Arthritis, NRAS, NASS, and wrote short articles, to provide basic headline information about various different diseases, common treatments e.g. Methotrexate. We provided easily accessible contact details and information about our clinic locations (including postcodes, bus links, car parking). Video content was written by the clinical authors and filmed by hci.digital.Patient involvement in designing the layout was particularly important for the App to be easily navigable by all.We launched the App, in June 2018, at a local patient educational conference. We encourage all patients on regular follow up to download it /use it and remind everyone about it in our clinic letters.Results:Downloads have been ongoing since launch, with over 1953 downloads and 21930 page views, with peaks around the time of our monthly education sessions when we advertise the App to new patients.Over 54% spent between 2 to 5+ minutes in the App at a time. Most of the videos in the App are about 2 minutes long. Common hits include: videos on medications, various conditions, contact details, clinic locations, and services available.We have had a number of spontaneous contacts from patients saying how valuable they find the information we have given them.The App aids efficiency by allowing direct phone calls to the correct member of the MDT e.g. rheumatology physio, rather than going through the secretaries. We are also encouraging direct email contact via the App. These aspects are helping us make our services more efficient.Conclusion:The App continues to be downloaded and used by our patients. It has become an important part of our patient education efforts, especially for those with a new diagnosis.We have had a significant increase in email contact from patients, allowing us to be more efficient by responding more quickly to patient queries, avoid additional telephone calls and avoid ansa-phone messages.To date, the App continues to be downloaded by patients and we have received very positive feedback. Having surveyed the users, our next step is to develop interactive PROMS, a calendar reminder function and medicines management function as these have been identified as additions users would find helpful to manage their disease. We have raised funds to develop the App. The updated app should be available by May 2020Download free from App store (search ‘Rheumatology Connect’) or go towww.rheumatologyconnect.info.Disclosure of Interests:None declared
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Rahman, Waqas ur, Md Delowar Hossain, and Eui-Nam Huh. "Fuzzy-Based Quality Adaptation Algorithm for Improving QoE from MPEG-DASH Video." Applied Sciences 11, no. 11 (June 6, 2021): 5270. http://dx.doi.org/10.3390/app11115270.
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Video clients employ HTTP-based adaptive bitrate (ABR) algorithms to optimize users’ quality of experience (QoE). ABR algorithms adopt video quality based on the network conditions during playback. The existing state-of-the-art ABR algorithms ignore the fact that video streaming services deploy segment durations differently in different services, and HTTP clients offer distinct buffer sizes. The existing ABR algorithms use fixed control laws and are designed with predefined client/server settings. As a result, adaptation algorithms fail to achieve optimal performance across a variety of video client settings and QoE objectives. We propose a buffer- and segment-aware fuzzy-based ABR algorithm that selects video rates for future video segments based on segment duration and the client’s buffer size in addition to throughput and playback buffer level. We demonstrate that the proposed algorithm guarantees high QoE across various video player settings and video content characteristics. The proposed algorithm efficiently utilizes bandwidth in order to download high-quality video segments and to guarantee high QoE. The results from our experiments reveal that the proposed adaptation algorithm outperforms state-of-the-art algorithms, providing improvements in average video rate, QoE, and bandwidth utilization, respectively, of 5% to 18%, about 13% to 30%, and up to 45%.
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Rodrigues, Charles, and Angel Freddy Godoy Viera. "Criteria for adoption of e-books in libraries in the context of the paradigm of cloud computing." Information Discovery and Delivery 46, no. 3 (August 20, 2018): 161–72. http://dx.doi.org/10.1108/idd-02-2018-0006.
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Purpose This paper aims to propose criteria and indicators for the adoption of e-books in libraries in the context of the cloud computing paradigm. Design/methodology/approach This paper carried out bibliographical and documentary research and the application of a questionnaire. Sampling focused on five library managers and five e-book vendor managers. Findings A proposal is presented containing a set of three criteria and their respective indicators. The technology platform criterion consists of seven indicators: patron data privacy, patron data security, availability of services, accessibility of information in e-books, interoperability of the technology platform, digital preservation and portability of e-books. The criterion for the acquisition of e-books involves three indicators: forms of commercialization, acquisition models and selection of e-book titles. The criterion for the circulation of e-books is divided into two indicators: unlimited and limited use. In the unlimited use mode, there are no limits on the use of e-books. In limited use, there are 11 levels of permissions: available copies, number of loans under each license, duration of the license, interlibrary loan, reading only in digital format, reading online via streaming only, download on the patron’s device, content printing, loan according to the patron’s identity, reservation services and renewal services. Practical implications This paper provides a set of criteria and indicators that can aid in the construction of policies and the development of collections, programs and projects directed toward the use of e-books in libraries. Originality/value This paper contributes socially by presenting a proposal that can support policies of evaluation and development of collections, projects, programs and actions around the adoption of e-books in different types of libraries.
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Herrera-Cubides, Jhon Francined, Paulo Alonso Gaona-García, and Kevin Gordillo-Orjuela. "Una Mirada a la Web de los Datos. Caso de Estudio: Consumo de Servicios CKAN." Ingeniería 22, no. 1 (January 30, 2017): 111. http://dx.doi.org/10.14483/udistrital.jour.reving.2017.1.a07.
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Context: In order to assess basic criteria so as to obtain preliminary guidelines on the current state of the Web of Data, we analyze the connection and use of the services offered by CKAN - Comprehensive Knowledge Archive Network; the analysis is conducted through exploration and connection to datasets published in the datahub.io open data repository.Method: We use the services offered by CKAN for browsing and downloading datasets published in Datahub.io, we propose a procedure carried out to analyze the downloaded data. The proposal consists of three key activities: (1) review and analysis of platform, (2) Setting up and using the services provided by the API and (3) download and review of the information obtained.Results: The required services offered by the platform CKAN were configured and deployed, in order to carry out queries and downloads related to each dataset. The obtained information was processed and analyzed from the downloaded JSON, allowing a comparative preliminary analysis of the information regarding the behavior of the Web of Data.Conclusions: CKAN is a powerful tool to manage data catalogs. This tool can handle a description of the data and other relevant information, from organizations that publish to people who query such information. These queries provide information as categories of organizations, data formats and owners, the type of publication licenses, links to other data, among other which are relevant to perform an analysis of the Web data.
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Boden, T. A., M. Krassovski, and B. Yang. "The AmeriFlux data activity and data system: an evolving collection of data management techniques, tools, products and services." Geoscientific Instrumentation, Methods and Data Systems Discussions 3, no. 1 (February 21, 2013): 59–85. http://dx.doi.org/10.5194/gid-3-59-2013.
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Abstract. The Carbon Dioxide Information Analysis Center (CDIAC) at Oak Ridge National Laboratory (ORNL), USA has provided scientific data management support for the US Department of Energy and international climate change science since 1982. Among the many data archived and available from CDIAC are collections from long-term measurement projects. One current example is the AmeriFlux measurement network. AmeriFlux provides continuous measurements from forests, grasslands, wetlands, and croplands in North, Central, and South America and offers important insight about carbon cycling in terrestrial ecosystems. To successfully manage AmeriFlux data and support climate change research, CDIAC has designed flexible data systems using proven technologies and standards blended with new, evolving technologies and standards. The AmeriFlux data system, comprised primarily of a relational database, a PHP based data-interface and a FTP server, offers a broad suite of AmeriFlux data. The data interface allows users to query the AmeriFlux collection in a variety of ways and then subset, visualize and download the data. From the perspective of data stewardship, on the other hand, this system is designed for CDIAC to easily control database content, automate data movement, track data provenance, manage metadata content, and handle frequent additions and corrections. CDIAC and researchers in the flux community developed data submission guidelines to enhance the AmeriFlux data collection, enable automated data processing, and promote standardization across regional networks. Both continuous flux and meteorological data and irregular biological data collected at AmeriFlux sites are carefully scrutinized by CDIAC using established quality-control algorithms before the data are ingested into the AmeriFlux data system. Other tasks at CDIAC include reformatting and standardizing the diverse and heterogeneous datasets received from individual sites into a uniform and consistent network database, generating high-level derived products to meet the current demands from a broad user group, and developing new products in anticipation of future needs. In this paper, we share our approaches to meet the challenges of standardizing, archiving and delivering quality, well-documented AmeriFlux data worldwide to benefit others with similar challenges of handling diverse climate change data, to further heighten awareness and use of an outstanding ecological data resource, and to highlight expanded software engineering applications being used for climate change measurement data.
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Boden, T. A., M. Krassovski, and B. Yang. "The AmeriFlux data activity and data system: an evolving collection of data management techniques, tools, products and services." Geoscientific Instrumentation, Methods and Data Systems 2, no. 1 (June 27, 2013): 165–76. http://dx.doi.org/10.5194/gi-2-165-2013.
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Abstract. The Carbon Dioxide Information Analysis Center (CDIAC) at Oak Ridge National Laboratory (ORNL), USA has provided scientific data management support for the US Department of Energy and international climate change science since 1982. Among the many data archived and available from CDIAC are collections from long-term measurement projects. One current example is the AmeriFlux measurement network. AmeriFlux provides continuous measurements from forests, grasslands, wetlands, and croplands in North, Central, and South America and offers important insight about carbon cycling in terrestrial ecosystems. To successfully manage AmeriFlux data and support climate change research, CDIAC has designed flexible data systems using proven technologies and standards blended with new, evolving technologies and standards. The AmeriFlux data system, comprised primarily of a relational database, a PHP-based data interface and a FTP server, offers a broad suite of AmeriFlux data. The data interface allows users to query the AmeriFlux collection in a variety of ways and then subset, visualize and download the data. From the perspective of data stewardship, on the other hand, this system is designed for CDIAC to easily control database content, automate data movement, track data provenance, manage metadata content, and handle frequent additions and corrections. CDIAC and researchers in the flux community developed data submission guidelines to enhance the AmeriFlux data collection, enable automated data processing, and promote standardization across regional networks. Both continuous flux and meteorological data and irregular biological data collected at AmeriFlux sites are carefully scrutinized by CDIAC using established quality-control algorithms before the data are ingested into the AmeriFlux data system. Other tasks at CDIAC include reformatting and standardizing the diverse and heterogeneous datasets received from individual sites into a uniform and consistent network database, generating high-level derived products to meet the current demands from a broad user group, and developing new products in anticipation of future needs. In this paper, we share our approaches to meet the challenges of standardizing, archiving and delivering quality, well-documented AmeriFlux data worldwide to benefit others with similar challenges of handling diverse climate change data, to further heighten awareness and use of an outstanding ecological data resource, and to highlight expanded software engineering applications being used for climate change measurement data.
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Ordóñez-Morales, Esteban Fernando, Martín López-Nores, Yolanda Blanco-Fernández, Efren Patricio Reinoso-Mendoza, Jack Fernando Bravo-Torres, José Víctor Saiáns-Vázquez, José Juan Pazos-Arias, Manuel Ramos-Cabrer, and Alberto Gil-Solla. "Sporadic Cloud-Based Mobile Augmentation on the Top of a Virtualization Layer: A Case Study of Collaborative Downloads in VANETs." Journal of Advanced Transportation 2019 (March 21, 2019): 1–21. http://dx.doi.org/10.1155/2019/3548213.
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Current approaches to Cloud-based Mobile Augmentation (CMA) leverage (cloud-based) resources to meet the requirements of rich mobile applications, so that a terminal (the so-called application node or AppN) can borrow resources lent by a set of collaborator nodes (CNs). In the most sophisticated approaches proposed for vehicular scenarios, the collaborators are nearby vehicles that must remain together near the application node because the augmentation service is interrupted when they move apart. This leads to disruption in the execution of the applications and consequently impoverishes the mobile users’ experience. This paper describes a CMA approach that is able to restore the augmentation service transparently when AppNs and CNs separate. The functioning is illustrated by a NaaS model where the AppNs access web contents that are collaboratively downloaded by a set of CNs, exploiting both roadside units and opportunistic networking. The performance of the resulting approach has been evaluated via simulations, achieving promising results in terms of number of downloads, average download times, and network overhead.
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Budiman, Rinova, Arif Imam Suroso, and Irman Hermadi. "Website Quality Analysis of Balai Besar Pascapanen Bogor Using 2QCV3Q Model." Jurnal Manajemen Teori dan Terapan | Journal of Theory and Applied Management 12, no. 1 (May 14, 2019): 30. http://dx.doi.org/10.20473/jmtt.v12i1.11887.
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BB-Pascapanen website is an official website of Balai Besar Pascapanen Bogor whose mission is to be able to integrate information as a research institute producing technology and innovation of agricultural post-harvest that supports the realization of food sovereignty and farmers' welfare. Based on the regulation and to accommodate those missions the website has been developed. The purpose of this study is to analyze the quality of the BB-Pascapanen website through a 2QCV3Q model. This model was chosen because it has a multi-party approach involving three actors in the development of a website, website owner, web developer and user which will make an analysis of website quality management implemented more detail. The results of the analysis show from institution and web developer point of view that the feasibility dimension needs performance improvement. While the other dimensions from user point of view that need to be improved are the dimension of identity (attributes of website uniqueness, Impressum distinctness), content (attribute of information detail and accuracy), services (attribute of correspondence feature), locations (attribute of availability of Link, URL easy to remember, easy searching in website, addresses written in website exists in google map, hotline), and usability (attribute of layout structure, orientation navigation and response, download time).
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Fragoso, Gilberto, Sherri de Coronado, Margaret Haber, Frank Hartel, and Larry Wright. "Overview and Utilization of the NCI Thesaurus." Comparative and Functional Genomics 5, no. 8 (2004): 648–54. http://dx.doi.org/10.1002/cfg.445.
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The NCI Thesaurus is a reference terminology covering areas of basic and clinical science, built with the goal of facilitating translational research in cancer. It contains nearly 110 000 terms in approximately 36000 concepts, partitioned in 20 subdomains, which include diseases, drugs, anatomy, genes, gene products, techniques, and biological processes, among others, all with a cancer-centric focus in content, and originally designed to support coding activities across the National Cancer Institute. Each concept represents a unit of meaning and contains a number of annotations, such as synonyms and preferred name, as well as annotations such as textual definitions and optional references to external authorities. In addition, concepts are modelled with description logic (DL) and defined by their relationships to other concepts; there are currently approximately 90 types of named relations declared in the terminology. The NCI Thesaurus is produced by the Enterprise Vocabulary Services project, a collaborative effort between the NCI Center for Bioinformatics and the NCI Office of Communications, and is part of the caCORE infrastructure stack (http://ncicb.nci.nih.gov/NCICB/core). It can be accessed programmatically through the open caBIO API and browsed via the web (http://nciterms.nci.nih.gov). A history of editing changes is also accessible through the API. In addition, the Thesaurus is available for download in various file formats, including OWL, the web ontology language, to facilitate its utilization by others.
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Senkomago, V., S. Singh, M. E. O'Neil, L. Pollack, A. Kolli, V. Benard, R. Lisa, and M. Wu. "Not Just a Pretty Picture: The U.S. Cancer Statistics Data Visualization Tool." Journal of Global Oncology 4, Supplement 2 (October 1, 2018): 219s. http://dx.doi.org/10.1200/jgo.18.88700.
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Background: The United States Centers for Disease Prevention and Control (CDC) National Program of Cancer Registries (NPCR) works to disseminate cancer surveillance data to multiple audiences in accessible, discoverable, and usable formats. To this end, CDC released the official federal cancer statistics, U.S. Cancer Statistics (USCS), in a data visualization tool available at www.cdc.gov/cancer/dataviz . We made further enhancements to the online tool since its initial release in 2017. Aim: We describe the process and enhancements made to the USCS data visualization tool's content, graphical displays, and sharing capabilities. Methods: CDC partnered with Agency for Toxic Substances and Disease Registry's Geospatial Research, Analysis, and Services Program to further work initiated by a group of cancer registrars, program planners, epidemiologists, computer programmers, and communication specialists to improve the visual presentation of USCS cancer incidence and mortality data. We conducted usability testing and implemented changes to the Web site's layout and added content, including county-level data, survival data, and prevalence estimates. Results: New features include county statistics, survival, prevalence, Puerto Rico data, and tobacco-, alcohol-, and obesity-related cancers data displays. The tool was also enhanced to better display on mobile devices. Data displays on national and state incidence, mortality and trends are available as maps and bar charts with interpretive text when users scroll over each graphic. Users can customize displays of overall and cancer-specific statistics, download data tables, and share each page via social media. Conclusion: Surveillance data are fundamental to measure progress and target action. CDC's interactive USCS data visualization tool is designed to make cancer data more accessible and usable to multiple users, including the general public, media, policy makers and planners. We will continue to improve the tool's accessibility and usefulness to facilitate the interpretation and sharing of cancer data.
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Charaf, Hassan. "Special Issue on CogInfoCom 2012." Journal of Advanced Computational Intelligence and Intelligent Informatics 18, no. 3 (May 20, 2014): 305. http://dx.doi.org/10.20965/jaciii.2014.p0305.
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Cognitive infocommunications (CogInfoCom) investigates connections between the cognitive sciences and different areas of infocommunications. CogInfoCom also focuses on engineering application fields integrating related scientific areas and results. Cognitive infocommunications systems involve hardware and software components that collect and store information and enable users to interact with this information. Besides communication security, considerations include the amount of stored information, which may be huge. This means that there is a need for algorithms and solutions that store and process data effectively. The CogInfoCom field presents a number of motivational challenges requiring active deep research, implementation, integration and measurement. This special issue focuses on the Cognitive Mobile Applications and Services track of the 3rd IEEE International Conference on Cognitive Infocommunications (CogInfoComf12). Mobile phones and tablets are now everyday tools that enable users to easily connect to the Internet, download social content, find interesting places, etc. Mobile technology has become one of the most important fields in the IT industry just as Web technology was 10-15 years ago. Mobile phones and tablets use sensors and interfaces like accelerometers, cameras, GPS, and thermometers that monitor and enable easier interaction with the real world. Agents hosted by mobile devices that learn from sensor-originated information also support individual applications and complex systems. This special issue focuses on the cognitive capabilities of mobile phones, the various agents that mobile devices host, and how they can be applied efficiently in applications and services including social aspects of mobile solutions. Papers from the conference cover mobile controlled environments, mobile-supported learning, augmented reality, energy efficiency and communication techniques. We thank the authors for submitting their papers to CogInfoCom as a venue for presenting their findings. We are also grateful to program committee members and reviewers for their efforts in making the conference and the special issue possible. We feel that these papers will provide readers with interesting and valuable results from the field of cognitive infocommunications.
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Al-Abbasi, Abubakr O., and Vaneet Aggarwal. "VidCloud." ACM Transactions on Modeling and Performance Evaluation of Computing Systems 5, no. 4 (March 2021): 1–32. http://dx.doi.org/10.1145/3442187.
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As video-streaming services have expanded and improved, cloud-based video has evolved into a necessary feature of any successful business for reaching internal and external audiences. In this article, video streaming over distributed storage is considered where the video segments are encoded using an erasure code for better reliability. We consider a representative system architecture for a realistic (typical) content delivery network (CDN). Given multiple parallel streams/link between each server and the edge router, we need to determine, for each client request, the subset of servers to stream the video, as well as one of the parallel streams from each chosen server. To have this scheduling, this article proposes a two-stage probabilistic scheduling. The selection of video quality is also chosen with a certain probability distribution that is optimized in our algorithm. With these parameters, the playback time of video segments is determined by characterizing the download time of each coded chunk for each video segment. Using the playback times, a bound on the moment generating function of the stall duration is used to bound the mean stall duration. Based on this, we formulate an optimization problem to jointly optimize the convex combination of mean stall duration and average video quality for all requests, where the two-stage probabilistic scheduling, video quality selection, bandwidth split among parallel streams, and auxiliary bound parameters can be chosen. This non-convex problem is solved using an efficient iterative algorithm. Based on the offline version of our proposed algorithm, an online policy is developed where servers selection, quality, bandwidth split, and parallel streams are selected in an online manner. Experimental results show significant improvement in QoE metrics for cloud-based video as compared to the considered baselines.
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Greshake, Bastian. "Looking into Pandora's Box: The Content of Sci-Hub and its Usage." F1000Research 6 (April 21, 2017): 541. http://dx.doi.org/10.12688/f1000research.11366.1.
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Despite the growth of Open Access, potentially illegally circumventing paywalls to access scholarly publications is becoming a more mainstream phenomenon. The web service Sci-Hub is amongst the biggest facilitators of this, offering free access to around 62 million publications. So far it is not well studied how and why its users are accessing publications through Sci-Hub. By utilizing the recently released corpus of Sci-Hub and comparing it to the data of ~28 million downloads done through the service, this study tries to address some of these questions. The comparative analysis shows that both the usage and complete corpus is largely made up of recently published articles, with users disproportionately favoring newer articles and 35% of downloaded articles being published after 2013. These results hint that embargo periods before publications become Open Access are frequently circumnavigated using Guerilla Open Access approaches like Sci-Hub. On a journal level, the downloads show a bias towards some scholarly disciplines, especially Chemistry, suggesting increased barriers to access for these. Comparing the use and corpus on a publisher level, it becomes clear that only 11% of publishers are highly requested in comparison to the baseline frequency, while 45% of all publishers are significantly less accessed than expected. Despite this, the oligopoly of publishers is even more remarkable on the level of content consumption, with 80% of all downloads being published through only 9 publishers. All of this suggests that Sci-Hub is used by different populations and for a number of different reasons, and that there is still a lack of access to the published scientific record. A further analysis of these openly available data resources will undoubtedly be valuable for the investigation of academic publishing.
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Giesbrecht, Edward Mark, William C. Miller, Boyang Tom Jin, Ian M. Mitchell, and Janice J. Eng. "Rehab on Wheels: A Pilot Study of Tablet-Based Wheelchair Training for Older Adults." JMIR Rehabilitation and Assistive Technologies 2, no. 1 (April 30, 2015): e3. http://dx.doi.org/10.2196/rehab.4274.
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Background Alternative and innovative strategies such as mHealth and eLearning are becoming a necessity for delivery of rehabilitation services. For example, older adults who require a wheelchair receive little, if any, training for proficiency with mobility skills. This substantive service gap is due in part to restricted availability of clinicians and challenges for consumers to attend appointments. A research team of occupational therapists and computer scientists engaged clinicians, consumers, and care providers using a participatory action design approach. A tablet-based application, Enhancing Participation In the Community by improving Wheelchair Skills (EPIC Wheels), was developed to enable in-chair home training, online expert trainer monitoring, and trainee-trainer communication via secure voice messaging. Objective Prior to undertaking a randomized controlled trial (RCT), a pilot study was conducted to determine the acceptability and feasibility of administering an mHealth wheelchair skills training program safely and effectively with two participants of different skill levels. The findings were used to determine whether further enhancements to the program were indicated. Methods The program included two in-person sessions with an expert trainer and four weeks of independent home training. The EPIC Wheels application included video instruction and demonstration, self-paced training activities, and interactive training games. Participants were provided with a 10-inch Android tablet, mounting apparatus, and mobile Wi-Fi device. Frequency and duration of tablet interactions were monitored and uploaded daily to an online trainer interface. Participants completed a structured evaluation survey and provided feedback post-study. The trainer provided feedback on the training protocol and trainer interface. Results Both participants perceived the program to be comprehensive, useful, and easily navigated. The trainer indicated usage data was comprehensive and informative for monitoring participant progress and adherence. The application performed equally well with multiple devices. Some initial issues with log-in requests were resolved via tablet-specific settings. Inconsistent Internet connectivity, resulting in delayed data upload and voice messaging, was specific to individual Wi-Fi devices and resolved by standardizing configuration. Based on the pilot results, the software was updated to make content download more robust. Additional features were also incorporated such as check marks for completed content, a more consumer-friendly aesthetic, and achievement awards. The trainer web interface was updated to improve usability and provides both a numerical and visual summary of participant data. Conclusions The EPIC Wheels pilot study provided useful feedback on the feasibility of a tablet-based home program for wheelchair skills training among older adults, justifying advancement to evaluation in an RCT. The program may be expanded for use with other rehabilitation interventions and populations, particularly for those living in rural or remote locations. Future development will consider integration of built-in tablet sensors to provide performance feedback and enable interactive training activities. Trial Registration ClinicalTrials.gov NCT01644292; https://clinicaltrials.gov/ct2/show/NCT01644292 (Archived by WebCite at http://www.webcitation.org/6XyvYyTUf).
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Testi, Debora, Paolo Quadrani, and Marco Viceconti. "PhysiomeSpace: digital library service for biomedical data." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 368, no. 1921 (June 28, 2010): 2853–61. http://dx.doi.org/10.1098/rsta.2010.0023.
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Every research laboratory has a wealth of biomedical data locked up, which, if shared with other experts, could dramatically improve biomedical and healthcare research. With the PhysiomeSpace service, it is now possible with a few clicks to share with selected users biomedical data in an easy, controlled and safe way. The digital library service is managed using a client–server approach. The client application is used to import, fuse and enrich the data information according to the PhysiomeSpace resource ontology and upload/download the data to the library. The server services are hosted on the Biomed Town community portal, where through a web interface, the user can complete the metadata curation and share and/or publish the data resources. A search service capitalizes on the domain ontology and on the enrichment of metadata for each resource, providing a powerful discovery environment. Once the users have found the data resources they are interested in, they can add them to their basket, following a metaphor popular in e-commerce web sites. When all the necessary resources have been selected, the user can download the basket contents into the client application. The digital library service is now in beta and open to the biomedical research community.
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Angela Lee, Siew Hoong, and Tong-Ming Lim. "A study on the perception of POKM as the organizational knowledge sharing enabler." VINE 45, no. 2 (May 11, 2015): 292–318. http://dx.doi.org/10.1108/vine-09-2013-0052.
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Purpose – The purpose of this study is to investigate the perception of knowledge workers on practice of knowledge management (POKM) as an organizational knowledge sharing enabler in an information technology shared services company to understand issues faced and provide recommendations on different technological characteristics of the system. Design/methodology/approach – The initial stage of the research involved a preliminary review of the existing knowledge management-related documents. This was followed by a top management interview to understand the organization’s business goals and knowledge management (KM) expectations. A total of 70 knowledge workers took part in the research activity. Twenty-five participants from nine departments took part in the preliminary interview, and 52 successful survey forms were collected from a total of 70 respondents. The entire investigation took close to nine months. Data compilation and research result analysis took about three months to complete. Findings – The outcomes of the research show that the quality of POKM is stable, easy to use and organization of the content is rated as good. However, POKM has poor response time and search capability. The content is found to be difficult to locate in the POKM but most participants agree that knowledge stored in the POKM is helpful, can be accessed anytime and anywhere and useful for their day-to-day job. As for the user interface, POKM is not very pleasant to use with a weak set of functions and features. For user satisfaction toward POKM, it is shown that users are not satisfied with the efficiency and effectiveness of the systems. However, employees generally are satisfied with the ease of access, download and reuse of knowledge contains in POKM. In term of perceived POKM benefits, users agree that POKM is an enabler for acquiring new knowledge and innovative ideas, managing and storing knowledge and accomplishing tasks more efficiently. Lastly, knowledge users agree that POKM functions enable knowledge networking, sharing and creation in the organization. Originality/value – POKM was launched and implemented for close to 10 years; however, the organization has failed to achieve some of the goals such as knowledge sharing among employees, creation of new skills and knowledge, measuring knowledge sharing activities and knowledge sharing strategy. The importance of this study is to understand and highlight the technological perspective of POKM from the knowledge workers. Findings will summarize issues faced by the case company for further action and remedy. The outcomes of the study also provide a comprehensive view and guideline to organizations who are interested to implement a KM system.
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Trystuła, Agnieszka, Małgorzata Dudzińska, and Ryszard Źróbek. "Evaluation of the Completeness of Spatial Data Infrastructure in the Context of Cadastral Data Sharing." Land 9, no. 8 (August 14, 2020): 272. http://dx.doi.org/10.3390/land9080272.
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The idea behind the Infrastructure for Spatial Information in Europe (INSPIRE) project was to provide EU citizens with access to various types of information, including environmental protection and spatial management data. These resources can be viewed (Web Map Service—WMS) and downloaded (Web Feature Service—WFS) online. Cadastral datasets represent one of the 34 spatial data themes in the spatial data infrastructure (SDI). The functionality of the SDI has not yet been fully achieved due to the failure of the WMS and WFS network services. The aim of this article was to assess the completeness of the SDI containing cadastral datasets. The present study has practical implications. The proposed diagnostic tool supports an assessment of the completeness of SDI resources in seven diagnostic groups (technical and legal identifiers, the cadastral information profile, the WMS network service, the WFS network service, source cadastral databases, data validity, and WMS and WFS standardization). The developed assessment methodology enables the identification of websites that publish cadastral data through INSPIRE network services, as well as problematic websites, and it has high development potential. The results of the assessment should be used in the ongoing construction of the SDI. They can also be used to improve the quality of network services and their availability for end users.
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Ladea, M., and M. Bran. "The acceptability of web-care for patients with major depressive disorder." European Psychiatry 33, S1 (March 2016): S28. http://dx.doi.org/10.1016/j.eurpsy.2016.01.848.
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IntroductionWith the extraordinary rate of development of E-health and widespread internet access in Romania, Inomedica decided to create a platform dedicated primarily to the patients and their families: depresiv.ro. According to Internet Live Stats there were 11,178,477 Internet users in Romania (representing 51.66% of the population) in 2014. Inomedica is a non-governmental organization founded by a multidisciplinary team (psychiatrists, sociologists, IT specialists).The platforms provide rigorous and quality online information about depression as well as self-assessment tools and Q&A section.The presentation will explore the development and effects of the first 16 months of operation of a web platform about depression.MethodsThe depresiv.ro platform design is simple and user friendly. Mental health specialists contributed to the development of the content, which is easy to access and understand.The platform also provides access to a self-evaluation tool, the Hospital Anxiety and Depression Scale (HADS), and thus helps the users identify possible problems and encourage them to seek professional help. The web application also included a demographic questionnaire, and a medical history questionnaire. A native iOS version of the application is available to download free on AppStore. The platform is supported by a Google grant program.ResultsThe platform traffic increased from a few users per day at launch to more than 1000 unique visitors per day. Since 1st January 2015, about 178,000 unique visitors accessed the platform. All the metrics improved significantly during the last months: bounce rate (66.3%), average session duration (02:17 minutes), number of pages per session (2.4).About 25,000 users accessed the HADS application since its release, from August 2014 until September 2015, showing the increasing need for free online self-evaluation tools.The Q&A section is one of the most visited on the platform since many users try to find answers for their questions regarding depressive or anxiety symptoms.ConclusionsAs new technologies are introduced and become more accessible, mental health specialists are developing new ways of providing services and collecting data. The traffic data/usage for both the depresiv.ro platform and the app are evidence for the widespread acceptability of web-based delivery methods.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Davidson, Jennifer C., Dimitar Karadzhov, and Graham Wilson. "Practitioners’ and Policymakers’ Successes, Challenges, Innovations, and Learning in Promoting Children’s Well-being During COVID-19: Protocol for a Multinational Smartphone App Survey." JMIR Research Protocols 10, no. 7 (July 29, 2021): e31013. http://dx.doi.org/10.2196/31013.
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Background The advent of COVID-19 abruptly thrust the health and safety of children and families into greater risk around the world. As regional and local governments, nongovernmental organizations, communities, families, and children grapple with the immediate public health impact of COVID-19, the rights and well-being of children, especially those who are already marginalized, have been overlooked. Those working with children have likely encountered unprecedented challenges and responded in innovative ways in efforts to address the needs and rights of all children. Objective This paper presents a protocol for a large-scale, multinational study using a new smartphone app to capture the real-time experiences and perspectives of practitioners and policymakers supporting children and families during the COVID-19 pandemic around the globe in relation to a children’s human rights 4P framework of protection, provision, prevention, and participation. Methods This protocol describes a mixed methods survey utilizing a custom-built iOS and Android smartphone app called the COVID 4P Log for Children’s Wellbeing, which was developed in close consultation with 17 international key partner organizations. Practitioners and policymakers working with and for children’s well-being across 29 countries and 5 continents were invited to download the app and respond to questions over the course of 8 weeks. The anticipated large amount of qualitative and quantitative response data will be analyzed using content analysis, descriptive statistics, and word frequencies. Results Formal data collection took place from October 2020 until March 2021. Data analysis was completed in July 2021. Conclusions The findings will directly inform the understanding of the ways in which COVID-19 has impacted practitioners’, managers’, and policymakers’ efforts to support children’s well-being in their practices, services, and policies, respectively. Innovative and ambitious in its scope and use of smartphone technology, this project also aims to inform and inspire future multinational research using app-based methodologies—the demand for which is likely to continue to dramatically rise in the COVID-19 era. Mitigating the risks of longitudinal remote data collection will help maximize the acceptability of the app, respondents’ sustained engagement, and data quality. International Registered Report Identifier (IRRID) DERR1-10.2196/31013
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Lee, JuHan, Jesse Dallery, Antonio Laracuente, Ifeoma Ibe, Samantha Joseph, Jinhai Huo, and Ramzi G. Salloum. "A content analysis of free smoking cessation mobile applications in the USA." Journal of Smoking Cessation 14, no. 4 (April 23, 2019): 195–202. http://dx.doi.org/10.1017/jsc.2019.6.
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AbstractAimsTo evaluate the quality and content of free smoking cessation apps and assess their adherence to the US Public Health Service guideline for treating tobacco use and dependence.MethodsIn total 180 apps were downloaded from the App Store and Google Play Store in January 2018; the top-ranking 30 apps were retrieved for the search terms: ‘smoking cessation’, ‘quit smoking’, ‘stop smoking’. Technical quality was rated using the Mobile Application Rating Scale (MARS) and by assessing other characteristics, behavioral change strategies and adherence to the 5As.Results/findingsA total 67 free-to-download apps were identified for full review (n = 40 from the Apple App Store and n = 27 from the Google Play Store). The average MARS score was 16.2/19.0: Engagement (3.3/5.0), Functionality (4.4/5.0), Aesthetics (4.0/5.0), and Information (2.6/5.0). Overall, 43 apps allowed sharing, 12 allowed for an app community, and five required a password. The following features were observed: assessment (n = 51), feedback (n = 38), information/education (n = 45), monitoring (n = 52), and goal setting (n = 23). Significant differences were found among apps adhering to the 5As: Ask (n = 44), Advise (n = 54), Assess (n = 30), Assist (n = 62), and Arrange (n = 0).ConclusionsGiven the growth in smoking cessation apps, future efforts should focus on improving their technical quality and adherence to the 5As.
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Jaradat, Ayman, Ahmed Patel, M. Zakaria, and Muhamad Amina. "Accessibility algorithm based on site availability to enhance replica selection in a data grid environment." Computer Science and Information Systems 10, no. 1 (2013): 105–32. http://dx.doi.org/10.2298/csis120102041j.
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A data grid functions as a scalable base for grid services to manage data files and their scattered replicas around the world. The principal objective of grid services is to support various data grid applications (jobs) as well as projects. Replica selection is an essential high-level service that selects a Grid location which verifies the shortest response time for the users' jobs among numerous different locations. In the grid environment, estimating response time precisely is not a simple task. Existing replica selection algorithms consume high response time to retrieve replicas because of miss-estimating replicas transfer times. This paper proposes a novel replica selection algorithm that considers site availability in addition to data transfer time. Site availability has not been addressed in previous efforts in the same context this paper does. Site availability is a new factor that can be utilized to estimate response time more accurately. Selecting an unavailable site or selecting a site with insufficient time will likely lead to disconnection. This in turn will require shifting to another site to resume the download or to start the download from scratch depending on the fault tolerance mechanism. Simulation results demonstrate that the performance of the new algorithm is proved to be better than the existing algorithms mentioned in literature.
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Shetty, Chetankumar G. "Distance Learning Using ExperInn E-Learning System Through Web." International Journal of Web-Based Learning and Teaching Technologies 7, no. 2 (April 2012): 43–50. http://dx.doi.org/10.4018/jwltt.2012040104.
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This paper describes how ExperInn e-learning system can be applied to distance learning. The author describes how to use ExperInn e-learning system without any client side/learner side software. The learner does not need to download packages from the ExperInn e-learning service provider’s website. The goal of the proposed distance learning system is to increase Learners Level of Perception (LLP) by providing them with realistic audio-visual content. The proposed distance learning using ExperInn e-learning system consists of uploading scanned images of the textbook in ExperInn e-learning service provider’s website, database creation by experts, putting the images and augmented reality content on the database, and indicating when a particular text book is ready. For interactive learning, the proposed ExperInn e-learning system exploits the color-band markers, which are stuck to the tip of a finger. Here the ExperInn e-learning software will be installed on the cloud so that the learning need not download and install ExperInn e-learning software in his personal computer.
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Chadee, Preetisha, and Sacha Evans. "Representation of #CAMHS on social media platform TikTok." BJPsych Open 7, S1 (June 2021): S241—S242. http://dx.doi.org/10.1192/bjo.2021.645.
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AimsThe video-based free social media app, TikTok, has grown in popularity during the COVID-19 pandemic, with half of British children using Tik Tok regularly. With more than 2 billion downloads, it was the most downloaded app of 2020. Child and Adolescent Mental Health Services (CAMHS) is currently found on TikTok via the hashtag #CAMHS. The aim of this study was to explore how CAMHS is represented on TikTok through reviewing the hashtags associated with CAMHS and exploring the themes of videos with the #CAMHS hashtag.MethodThe Tik Tok app was downloaded and a search for the hashtags which featured the word #CAMHS was undertaken. A thematic analysis of the top 100 most popular uploaded videos featuring the #CAMHS was conducted. The number of likes, views and shares of the videos featuring each theme was recorded.ResultVideos with the hashtag #CAMHS had 203.9 million views, followed by: #camhsmeme(s) totalling 43.1 million views, #camhsjokes with 21.4 million views and #camhskids, 12.5 million views. The top 100 most popular videos represented 24% of total viewed videos with the hashtag #CAMHS.The most popular recurrent themes associated with the hashtag #CAMHS in our sample were: raising awareness of mental health symptoms and management (40% of videos), reference to self-harm (27% of videos) and negative perception of CAMHS (27% of videos).Raising awareness of mental health symptoms and management had the most likes (3,694,700) and views (17,435,900). This was followed by videos with themes of reference to self-harm (3,006,300 likes and 14,382,700 views). The most shared themes were: reference to suicide (shared 56,763 times) and videos which portrayed a theme of negative perception of CAMHS (40,628 shares). Videos with themes of a negative perception of CAMHS also garnered 1,762,500 likes and 8,666,900 views.ConclusionCAMHS is actively represented on TikTok through freely accessible unregulated videos. Videos with themes of raising awareness of mental health symptoms and management can potentially allow young people to share their experiences. Nonetheless, popular hashtags such as #CAMHSmemes and #CAMHSjokes, as well as videos featuring themes of negative perception of CAMHS, could potentially undermine the reputation of CAMHS to existing and future service users. The content of these videos should be taken seriously by CAMHS clinicians as it can potentially provide an insight into service users’ experiences of CAMHS on a scale that has not been observed before. Presently these videos are not screened or modulated by the NHS CAMHS service.
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Kaczmarek-Templin, Berenika. "Unclear Status of Digital Content in Polish Consumer Rights Regulation." Masaryk University Journal of Law and Technology 9, no. 2 (September 30, 2015): 85–93. http://dx.doi.org/10.5817/mujlt2015-2-5.
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This paper aims to focus on the influence of the new consumer rights directive (2011/83/UE) on polish law. Till now there was not any regulation of electronic commerce, which deals with digital content, although music, movie and book single sales are mostly digital downloads. Regarding to polish Civil Code and the other acts, it has never been defined what the digital content is, it has never been resolved weather it is the product or the service.
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Fitzgerald, Martin, and Tracy McClelland. "What makes a mobile app successful in supporting health behaviour change?" Health Education Journal 76, no. 3 (December 27, 2016): 373–81. http://dx.doi.org/10.1177/0017896916681179.
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Introduction: Health promotion apps designed to support and reinforce health behaviours or to reduce risk behaviours are the most commonly downloaded apps. Such technologies have the potential to reach and deliver health care to new populations. But the extent to which they are successful in enabling the adoption of new and desired behaviours can vary. Some apps are more effective than others, some are free to download while others require a nominal or substantial charge. Cost alone is not indicative of quality or effectiveness. This is important because the use of health apps by the public will likely increase, as is the expectation that health care professionals understand this technology and its heuristic role in personalised health. Practitioners therefore need to be better informed regarding what makes a health app appealing to service users and successful as an intervention to facilitate behaviour change. Objective: This paper describes and discusses how the structure and content of health care apps can facilitate or inhibit behavioural change. The aim is to support practitioners in the screening and identification of suitable apps for clinical use. Method: Theory and literature review. Conclusion: App content that involved clinician input at the design stage and included internal drivers such as motivation, self-efficacy and illness understanding and external drivers such as illness information, social networking and user compatibility tend to do better in facilitating behaviour change than those that do not. Of these factors, motivation is considered to be the most important.
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Kim, Hwangnam, Woonghee Lee, Hyunsoon Kim, Hwantae Kim, and Jaehyeuk Michael Yang. "Protecting Download Traffic from Upload Traffic over Asymmetric Wireless Links." Wireless Communications and Mobile Computing 2018 (July 12, 2018): 1–15. http://dx.doi.org/10.1155/2018/1283420.
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Many varied mobile device networks have been developed with the advancement of communication and network technologies. Cellular data networks are currently the most widely used, and the number of cellular network subscriptions has increased steadily. Most recent wireless access technologies employ asymmetric uplinks and downlinks because mobile subscribers usually download contents from the Internet. Therefore, most cellular network service providers allocate more bandwidth to downlinks than uplinks for mobile subscribers. However, this asymmetry can have unexpected influence on network performance, particularly TCP performance. When the uplink interface is congested, TCP ACK packets are delayed by TCP data packets on the uplink, causing considerable TCP retransmissions on the downlink channel. Thus, downlink bandwidth cannot be fully utilized, which results in significantly degraded downlink throughput. To resolve this problem, this paper proposes a feedback scheme, network traffic chunk regulator (NCR). We analyzed the aforementioned problem through the empirical study, and we designed and implemented NCR based on the analysis. NCR adaptively controls TCP according to the degree of link usage asymmetry. We evaluate NCR performance through simulations and experiments with real devices. We verify that the proposed scheme allows the downlink traffic to not interfere with the aggressive uplink traffic. Thus, NCR increases total link utilization and aggregated throughput significantly, without imposing additional overhead on base or mobile stations.
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Deulkar, Deepa S. "Cloud based EDoS Attack Prevention System Using Dual Access Control Mechanism." International Journal for Research in Applied Science and Engineering Technology 9, no. VII (July 20, 2021): 1843–45. http://dx.doi.org/10.22214/ijraset.2021.36553.
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Cloud based data storage is becoming very popular nowadays as one can easily download any document from anytime and anywhere. However documents security is very important in cloud storage as cloud is a third party server which can be accessed by administrators. There are many literatures available to improve document security on cloud and most of the literatures proposed various data encryption techniques. However, simply encrypting data (e.g., via AES) cannot fully address the practical need of data management. Besides, an effective access control over download request also needs to be considered so that Economic Denial of Sustainability (EDoS) attacks cannot be launched to hinder users from enjoying service. In this project, we consider the dual access control, in the context of cloud-based storage, in the sense that we design a control mechanism over both data access and download request without loss of security and efficiency. Along with dual access control we also focus on document security by using modified AES algorithm.
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Poularakis, Konstantinos, and Leandros Tassiulas. "Cooperation and information replication in wireless networks." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 374, no. 2062 (March 6, 2016): 20150123. http://dx.doi.org/10.1098/rsta.2015.0123.
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A significant portion of today's network traffic is due to recurring downloads of a few popular contents. It has been observed that replicating the latter in caches installed at network edges—close to users—can drastically reduce network bandwidth usage and improve content access delay. Such caching architectures are gaining increasing interest in recent years as a way of dealing with the explosive traffic growth, fuelled further by the downward slope in storage space price. In this work, we provide an overview of caching with a particular emphasis on emerging network architectures that enable caching at the radio access network. In this context, novel challenges arise due to the broadcast nature of the wireless medium, which allows simultaneously serving multiple users tuned into a multicast stream, and the mobility of the users who may be frequently handed off from one cell tower to another. Existing results indicate that caching at the wireless edge has a great potential in removing bottlenecks on the wired backbone networks. Taking into consideration the schedule of multicast service and mobility profiles is crucial to extract maximum benefit in network performance.
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Peng, Ningduo, Guangchun Luo, Ke Qin, and Aiguo Chen. "Query-Biased Preview over Outsourced and Encrypted Data." Scientific World Journal 2013 (2013): 1–13. http://dx.doi.org/10.1155/2013/860621.
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For both convenience and security, more and more users encrypt their sensitive data before outsourcing it to a third party such as cloud storage service. However, searching for the desired documents becomes problematic since it is costly to download and decrypt each possibly needed document to check if it contains the desired content. An informative query-biased preview feature, as applied in modern search engine, could help the users to learn about the content without downloading the entire document. However, when the data are encrypted, securely extracting a keyword-in-context snippet from the data as a preview becomes a challenge. Based on private information retrieval protocol and the core concept of searchable encryption, we propose a single-server and two-round solution to securely obtain a query-biased snippet over the encrypted data from the server. We achieve this novel result by making a document (plaintext) previewable under any cryptosystem and constructing a secure index to support dynamic computation for a best matched snippet when queried by some keywords. For each document, the scheme hasO(d)storage complexity andO(log(d/s)+s+d/s)communication complexity, wheredis the document size andsis the snippet length.
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Al-Mouh, Najd, and Hend S. Al-Khalifa. "Enhancing web accessibility by implementing context aware proxy." International Journal of Web Information Systems 12, no. 2 (June 20, 2016): 201–14. http://dx.doi.org/10.1108/ijwis-11-2015-0037.
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Purpose Millions of visually impaired people (VIP) in the world still face difficulties browsing the Web and accessing information. This paper aims to present a proxy service that takes advantage of the concept of context-aware to help contextualizing web pages for visually impaired users. Design/methodology/approach The VIP-aware proxy combines five components to utilize the user preferences, adapts the requested web page and reorganizes its content to best match the preferences set by the user. This new scenario will assist VIP in browsing the Web more effectively. Findings A preliminary evaluation of the system resulted in general user satisfaction. Practical implications The VIP-aware proxy will provide users with a clean, accessible web page, save them time when screen readers examine content related to their preferences and save them money when unnecessary content is not downloaded. Originality/value The VIP-aware proxy presented in this paper is the first of its kind targeting VIP.
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Huang, Tianyu, Xijuan Guo, Yue Zhang, and Zheng Chang. "Collaborative Content Downloading in VANETs with Fuzzy Comprehensive Evaluation." Symmetry 11, no. 4 (April 6, 2019): 502. http://dx.doi.org/10.3390/sym11040502.
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Vehicle collaborative content downloading has become a hotspot in current vehicular ad-hoc network (VANET) research. However, in reality, the highly dynamic nature of VANET makes users lose resources easily, and the transmission of invalid segment data also wastes valuable bandwidth and storage of the users’ vehicles. In addition, the individual need of each customer vehicle should also be taken into consideration when selecting an agent vehicle for downloading. In this paper, a novel scheme is proposed for vehicle selection in the download of cooperative content from the Internet, by considering the basic evaluation information of the vehicle. To maximize the overall throughput of the system, a collaborative content downloading algorithm is proposed, which is based on fuzzy evaluation and a customer’s own expectations, in order to solve the problems of agent vehicle selection. With the premise of ensuring successful downloading and the selection preferences of customer vehicles, linear programming is used to optimize the distribution of agent vehicles and maximize customer’s satisfaction. Simulation results show that the proposed scheme works well in terms of average quality of service, average bandwidth efficiency, failure frequency, and average consumption.