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Journal articles on the topic 'Value-added networks (Computer networks) – Ghana'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

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1

Adu-Manu, Kofi Sarpong, Ferdinand Apietu Katsriku, Jamal-Deen Abdulai, and Felicia Engmann. "Smart River Monitoring Using Wireless Sensor Networks." Wireless Communications and Mobile Computing 2020 (September 21, 2020): 1–19. http://dx.doi.org/10.1155/2020/8897126.

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Water quality monitoring (WQM) systems seek to ensure high data precision, data accuracy, timely reporting, easy accessibility of data, and completeness. The conventional monitoring systems are inadequate when used to detect contaminants/pollutants in real time and cannot meet the stringent requirements of high precision for WQM systems. In this work, we employed the different types of wireless sensor nodes to monitor the water quality in real time. Our approach used an energy-efficient data transmission schedule and harvested energy using solar panels to prolong the node lifetime. The study took place at the Weija intake in the Greater Accra Region of Ghana. The Weija dam intake serves as a significant water source to the Weija treatment plant which supplies treated water to the people of Greater Accra and parts of Central regions of Ghana. Smart water sensors and smart water ion sensor devices from Libelium were deployed at the intake to measure physical and chemical parameters. The sensed data obtained at the central repository revealed a pH value of 7. Conductivity levels rose from 196 S/cm to 225 S/cm. Calcium levels rose to about 3.5 mg/L and dropped to about 0.16 mg/L. The temperature of the river was mainly around 35°C to 36°C. We observed fluoride levels between 1.24 mg/L and 1.9 mg/L. The oxygen content rose from the negative DO to reach 8 mg/L. These results showed a significant effect on plant and aquatic life.
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Gedel, Ibrahim Alhassan, and Nnamdi Nwulu. "Infrastructure Sharing for 5G Deployment: A Techno-Economic Analysis." International Journal of Interactive Mobile Technologies (iJIM) 15, no. 02 (January 26, 2021): 137. http://dx.doi.org/10.3991/ijim.v15i02.16749.

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<p>Fifth-generation wireless (5G) mobile communication technology has been classified as a high wireless standard that is capable of handling internet of things, machine-to-machine, and device-to-device communication. Consequently, there is a need to meet the very sensitive requirements of 5G, which include high coverage density, high speed, high capacity and low end-to-end delay. Of crucial importance is 5G’s passive infrastructure. This paper therefore presents a techno-economic analysis of the current telecommunication infrastructure, as well as investigating and determining the suitable passive infrastructure for 5G technology deployment. The paper outlines all the passive infrastructure elements and proposes a mathematical model to calculate the capital expenditure, operational expenditure, total cost of investment (TCI) or total cost of ownership (TCO) and net present value (NPV). Experiments are performed using market prices from the national communication authority, the mobile network operators and the tower company of Ghana. Furthermore, a sensitivity analysis is performed to identify the variables that increase the TCO or TCI, NPV and return on investment, and to propose the most economical passive infrastructure architecture for easy implementation of 5G technology in Ghana and Africa.</p>
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Kubuga, Kennedy Kumangkem, Daniel Azerikatoa Ayoung, and Stephen Bekoe. "Ghana’s ICT4AD policy: between policy and reality." Digital Policy, Regulation and Governance 23, no. 2 (June 16, 2021): 132–53. http://dx.doi.org/10.1108/dprg-02-2020-0020.

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Purpose Nearly at the end of its lifespan, the Ghana ICT4AD policy is in a position for a holistic view, especially through the eyes of the intended beneficiaries. This paper aims to fill that gap. The paper measures the gap between what was intended and what has been realised and, based on that, makes recommendations for stakeholders. Design/methodology/approach The research used the design reality gap analysis approach to numerically examine the deviation or otherwise of the ideals of the Ghana ICT4AD policy from or to the reality on the ground. It required the breaking down of the problem into dimensions and subdimensions and involved interviewing office holders, academics, practitioners and students over a three-year period. The recommendations include a review of the policy before it expires and an explicit designation of an agency responsible for coordination, monitoring and evaluation of the various stages of the policy. Findings The chief finding is that Ghana’s ICT4AD policy might miss the targets totally, or might well be a partial failure unless action is taken to close the design–reality gaps identified by the research. As the policy is almost at the end of its lifespan, recommendations are even more useful when the recommended revision takes place. Research limitations/implications The major limitation of the is that it looks only at the implementation success or failure without a probe into the causal factors and/or the impact on society. Practical implications The policy runs full term at end 2022, with large gaps between the plans of the framers and the reality on the ground. An immediate revision of the policy is most recommended. Originality/value Besides this study, the authors have not come across any such comprehensive study of the Ghana ICT4AD policy, especially with the amount of data now available after two decades. There is a similarity with a Pakistani study, which has been acknowledged in this study, but the two works differ greatly in methodology, context and style.
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Osei-Frimpong, Kofi, Graeme McLean, and Samuel Famiyeh. "Social media brand engagement practices." Information Technology & People 33, no. 4 (November 25, 2019): 1235–54. http://dx.doi.org/10.1108/itp-05-2018-0220.

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Purpose The purpose of this paper is to deepen the understanding on social media brand engagement (SMBE) practices by exploring the impact of consumer brand knowledge, perceived social pressure, perceived social relatedness (PSR) and the role of brand trust. Design/methodology/approach A model is proposed to suggest the influence of consumer-level antecedents and moderators of SMBE. Following a survey design approach, data collected from 687 respondents on Facebook are examined through structural equation modelling using AMOS 23.0. Findings The findings reveal significant relationship between the examined antecedents (brand knowledge, perceived social pressure and brand trust) and SMBE. Examination of the moderation role of PSR revealed significant interaction effects on the relationship between brand knowledge and SMBE, as well as perceived social pressure and SMBE. The findings also suggest a lack of interaction effect of PSR on the relationship between brand trust and SMBE. Research limitations/implications This research provides empirical evidence in support of understanding SMBE practices by testing theoretically grounded hypotheses. The study focussed on technologically savvy respondents and only Facebook users in Ghana, which could limit the generalisation of the findings reported. Practical implications This study illustrates a need for managers to integrate multi-communication channels to enhance brand interactions and engagements. Firms must also adopt strategies that would enhance the sharing of interesting information about their brands on their social media platforms to attract others through customer networks. Originality/value The conceptualization of SMBE in this study zooms out our understanding of online SMBE by examining pertinent variables that drive or moderate consumer participation in SMBE activities. The integration of these variables brings out new empirical understanding and extends our knowledge on SMBE.
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Ghani, Nasir, Qing Liu, Ashwin Gumaste, John Lankford, Abdallah Shami, Chadi Assi, Ahmad Khalil, and Driss Benhaddou. "Value-added services in next-generation SONET/SDH networks." IEEE Communications Magazine 46, no. 11 (November 2008): 64–73. http://dx.doi.org/10.1109/mcom.2008.4689247.

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6

Capelastegui, Pedro, Alberto Hernandez, Francisco Gonzalez Vidal, Enrique Vazquez, Joaquin Navarro, and Nuria Siguero. "Group management in value-added services over IMS networks." IEEE Latin America Transactions 8, no. 2 (April 2010): 120–26. http://dx.doi.org/10.1109/tla.2010.5514437.

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7

Dzidzah, Esther, Kwame Owusu Kwateng, and Benjamin Kofi Asante. "Security behaviour of mobile financial service users." Information & Computer Security 28, no. 5 (June 29, 2020): 719–41. http://dx.doi.org/10.1108/ics-02-2020-0021.

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Purpose The inception of mobile financial services (MFSs) has positively provoked economic growth and productivity, nonetheless, it has pessimistically caused an upward surge in cybersecurity threat. Customers are progressively becoming conscious of some of the threat and several of them now shun away from some suspicious activities over the internet as a form of protection. This study aims to explore the factors that influence users’ to adopt security behaviour. Design/methodology/approach A synthesis of theories – Self-efficacy and technology threat avoidance theories – was used to examine the security behaviour of users of MFSs. Data was gathered from 530 students in Ghana using convenience sampling technique. Data analysis was carried out using descriptive statistics, inferential statistics and structural equation model. Findings Outcome of the investigation indicate that both mastery experience and verbal persuasion have substantial effect on the avoidance motivation of MFSs users. It was, however, found that emotional state and vicarious experience of users do not influence their avoidance motivation. Also, it was established that avoidance motivation is a positive prognosticator of avoidance behaviour. Practical implications Understanding the security behaviour of MFS users will help the operators to outline strategies to sustain the successes achieved. Originality/value Studies on user security behaviour are rare, especially in sub Saharan Africa, thus, this study will contribute to extant literature by adding a new dimension of user security behaviour.
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8

Leighfield, JP. "Implementing and operating a value added network." Computer Communications 8, no. 4 (August 1985): 199–202. http://dx.doi.org/10.1016/0140-3664(85)90254-3.

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9

Gong, Chao, Kamil Sarac, Ovidiu Daescu, Balaji Raghavachari, and Raja Jothi. "Load-balanced agent activation for value-added network services." Computer Communications 29, no. 11 (July 2006): 1905–16. http://dx.doi.org/10.1016/j.comcom.2005.10.035.

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Song, Qiang, Zhaoming Li, Ibrahim Habib, and Wesam Alanqar. "Value-added proposition of the GMPLS control plane in IP optical networks." Journal of Optical Networking 4, no. 12 (2005): 838. http://dx.doi.org/10.1364/jon.4.000838.

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11

Cao, Xuefei, Xingwen Zeng, Weidong Kou, and Liangbing Hu. "Identity-Based Anonymous Remote Authentication for Value-Added Services in Mobile Networks." IEEE Transactions on Vehicular Technology 58, no. 7 (September 2009): 3508–17. http://dx.doi.org/10.1109/tvt.2009.2012389.

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12

Smith, Ken. "Implications of value added network services." Data Processing 27, no. 6 (July 1985): 41–45. http://dx.doi.org/10.1016/0011-684x(85)90272-2.

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13

Gunes, Mehmet H., Sevcan Bilir, Kamil Sarac, and Turgay Korkmaz. "A measurement study on overhead distribution of value-added internet services." Computer Networks 51, no. 14 (October 2007): 4153–73. http://dx.doi.org/10.1016/j.comnet.2007.05.001.

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14

Zdravkovic, Milan, and Miroslav Trajanovic. "Integrated product ontologies for inter-organizational networks." Computer Science and Information Systems 6, no. 2 (2009): 29–46. http://dx.doi.org/10.2298/csis0902029z.

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Purpose of this paper is to propose approach and technical infrastructure for improvement of inter-organizational networks' response in product information acquisition and management. Different approaches (industrial categorization schemes, functional decomposition and semantic web) for management of product information are analyzed in context of inter-organizational networks. Process for semantic alignment of product information is defined, resulting with generalized, two-dimensional model, consisting of design and functional perspective. The process is expected to decrease human intervention in product data exchange in networked environments, as well as to create added value, through possible recognition of design intent, automated referencing to related manufacturing competences and reuse potential. Current prototype of system comprises of product ontologies and interfaces for topological model submission and refinement by using lexical term and predicate matching and property transfer. Impact of using formalized functional perspective is only theoretically justified and it still needs to be verified.
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15

Sui, Guangjun, Jialing Zou, Shuang Wu, and Danling Tang. "Comparative Studies on Trade and Value-Added Trade along the “Belt and Road”: A Network Analysis." Complexity 2021 (August 13, 2021): 1–12. http://dx.doi.org/10.1155/2021/3994004.

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With the deepening of regional industrial transfer, traditional trade data cannot fully explain the real level of trade in a region. This paper aims to reveal the changing pattern of real trade along the “Belt and Road” by establishing a value-added trade (VAT) network of the “Belt and Road” countries and comparing it with the trade network. Applying a network method, we analyze and compare the structures, characteristics, evolutions, and underlying dynamisms of both networks. With a thorough interpretation and visualization of the network density, network centrality, trade communities, and influencing factors of both networks in the three time sections of 2005, 2010, and 2015, we come to the following findings: (1) the connectivity of both networks has been greatly enhanced, reflecting a more integrated regional economy. (2) The center-external structure of both networks has been further strengthened and the polarization of the VAT network is more obvious than that of the trade network. (3) The organizations of trade communities and VAT communities are largely different. Specifically, China rapidly increased its core position in the VAT network and incorporated more and more countries into its VAT community. (4) The underlying factors have similar impacts on both networks. While the growth of regional economic size and free trade agreements will enhance both trade and VAT, the economic gaps and population differences among the “Belt and Road” countries will prohibit regional economic ties. Based on these findings, we propose suggestions on further regional economic cooperation by taking advantage of China’s core position to promote regional VAT, construct broad trade channels, and enhance trade governance.
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Tennent, Beth, Karen Windeknecht, and Jo Kehoe. "Teaching with technology: value‐added innovation or necessity?" Campus-Wide Information Systems 21, no. 4 (September 2004): 144–50. http://dx.doi.org/10.1108/10650740410555016.

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Bremmers, Harry, Bernd van der Meulen, Krijn Poppe, and Jo Wijnands. "Managerial responses to transaction cost disequilibrium in food supply chains and networks." Journal on Chain and Network Science 10, no. 1 (January 1, 2010): 51–58. http://dx.doi.org/10.3920/jcns2010.x104.

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Differences in transaction costs (i.e. costs of information processing, monitoring and control) between firms in local supply chains as well as in an international setting may have a negative impact on competitiveness and on creation of value added. Transaction cost disequilibrium is defined as a state in which transaction costs exceed the transaction benefits from the exchange of assets. The goal of this article is to assess whether such a disequilibrium exists for European food supply chains; if so, what its effects are and how it can be reduced. Transaction cost disequilibrium will be investigated at two levels: international competition and within local supply chains. The first focuses on the competitiveness of supply chains in global markets, the second especially regards the competitive position of companies within a single supply chain. To address our research question, we gathered empirical data by means of survey questionnaires and interviews in 2007 and 2008. The results show that internationally differences in transaction costs exist, but perceived disadvantages of EU food firms towards the US are being outweighed by perceived transaction benefits (i.e. preferred higher levels of food safety). However, within local supply chains SMEs are confronted with more than average transaction and compliance costs. Transaction benefits can only partially be reaped, especially because of a lack of transparency of the origin of value added to consumers. Proposed improvements to the competitive position of SMEs - contingent upon supply chain structure and product characteristics - include up-scaling, improvement of innovative power, co-labelling as well as simplification of EU food law.
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LIMA, F. W. S. "MAJORITY-VOTE ON DIRECTED BARABÁSI–ALBERT NETWORKS." International Journal of Modern Physics C 17, no. 09 (September 2006): 1257–65. http://dx.doi.org/10.1142/s0129183106008972.

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On directed Barabási–Albert networks with two and seven neighbours selected by each added site, the Ising model was seen not to show a spontaneous magnetisation. Instead, the decay time for flipping of the magnetisation followed an Arrhenius law for Metropolis and Glauber algorithms, but for Wolff cluster flipping the magnetisation decayed exponentially with time. On these networks the Majority-vote model with noise is now studied through Monte Carlo simulations. However, in this model, the order-disorder phase transition of the order parameter is well defined in this system. We calculate the value of the critical noise parameter qc for several values of connectivity z of the directed Barabási–Albert network. The critical exponentes β/ν, γ/ν and 1/ν were calculated for several values of z.
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Calhoun, Charles, Mary Ellen Oliverio, and Philip Wolitzer. "Ethics and the Cpa: Building Trust and Value Added Services." EDPACS 26, no. 11 (May 1999): 15. http://dx.doi.org/10.1201/1079/43239.26.11.19990501/30207.4.

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LIU, Bing, and Shou-lian TANG. "Revenue-sharing analysis in the mobile value-added services." Journal of China Universities of Posts and Telecommunications 13, no. 4 (December 2006): 102–5. http://dx.doi.org/10.1016/s1005-8885(07)60044-2.

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Dieye, Mouhamad, Shohreh Ahvar, Jagruti Sahoo, Ehsan Ahvar, Roch Glitho, Halima Elbiaze, and Noel Crespi. "CPVNF: Cost-Efficient Proactive VNF Placement and Chaining for Value-Added Services in Content Delivery Networks." IEEE Transactions on Network and Service Management 15, no. 2 (June 2018): 774–86. http://dx.doi.org/10.1109/tnsm.2018.2815986.

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Lustosa, Bernardo C., Alberto L. Albertin, and Fernando Moreira. "Pricing in Information Orchestrators and Maximizing Stable Networks." International Game Theory Review 21, no. 03 (September 2019): 1850013. http://dx.doi.org/10.1142/s0219198918500135.

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In innovation networks based on information exchange, an orchestrating actor, or hub, captures information from peripheral actors, promotes innovation and then distributes it to the network in the form of added value. This paper identifies the pricing options proposed by the orchestrating hub that would result in the network’s stability and efficiency. Since all the companies in this ecosystem can be seen as rational agents, game theory is an appropriate framework for studying pricing as a mechanism to promote network stability. We analyze the equilibrium conditions in this context and conclude that the Nash equilibrium entails the network’s stability. Our findings indicate that, in order to maximize the innovation power of the network, the agents should be charged a price proportional to the financial benefit obtained by the net innovation. This study fills relevant gaps in the literature on monopolistic orchestrated innovation and the pricing structures of network connections.
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Nicolini, A. L., C. M. Lorenzetti, A. G. Maguitman, and C. I. Chesñevar. "Intelligent query processing in P2P networks: Semantic issues and routing algorithms." Computer Science and Information Systems 16, no. 2 (2019): 409–42. http://dx.doi.org/10.2298/csis180411002n.

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P2P networks have become a commonly used way of disseminating content on the Internet. In this context, constructing efficient and distributed P2P routing algorithms for complex environments that include a huge number of distributed nodes with different computing and network capabilities is a major challenge. In the last years, query routing algorithms have evolved by taking into account different features (provenance, nodes? history, topic similarity, etc.). Such features are usually stored in auxiliary data structures (tables, matrices, etc.), which provide an extra knowledge engineering layer on top of the network, resulting in an added semantic value for specifying algorithms for efficient query routing. This article examines the main existing algorithms for query routing in unstructured P2P networks in which semantic aspects play a major role. A general comparative analysis is included, associated with a taxonomy of P2P networks based on their degree of decentralization and the different approaches adopted to exploit the available semantic aspects.
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Wang, Xiaoyu, Pin-Han Ho, Alexander Wong, and Limei Peng. "Cognitive-Empowered Femtocells: An Intelligent Paradigm for Femtocell Networks." Wireless Communications and Mobile Computing 2018 (June 20, 2018): 1–9. http://dx.doi.org/10.1155/2018/3132424.

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Deploying femtocells has been taken as an effective solution for removing coverage holes and improving wireless service performance in 3G-beyond wireless networks such as WiMAX and Long Term Evolution (LTE). This article investigates a novel framework of dynamic spectrum management for femtocell networks, called cognitive-empowered femtocells (CEF), aiming at mitigating both cross-tier and intratier interferences with minimum modifications required on the corresponding macrocell network. With the proposed framework, each CEF base station (BS) and the femtocell users can utilize spatiotemporally available radio resources for the access traffic. We conclude that the proposed CEF framework can effectively complement the existing femtocell design and serve as a value-added feature to the state-of-the-art femtocell technologies, while achieving high scalability and interoperability by minimizing the required modifications on the macrocell protocol design.
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Xia Wang. "Research on Evaluation of High-Tech Enterprises Performance in Zigong Based on Economic Value Added." International Journal of Digital Content Technology and its Applications 7, no. 2 (January 31, 2013): 272–79. http://dx.doi.org/10.4156/jdcta.vol7.issue2.32.

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Tanutama, Lukas, Gerrard Polla, Raymond Kosala, and Richard Kumaradjaja. "Novel Value Added Services Generated from Corporate Network Data." Advanced Science Letters 21, no. 4 (April 1, 2015): 648–51. http://dx.doi.org/10.1166/asl.2015.5922.

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The competitive nature of Internet access service business drives Service Providers to find innovative revenue generators within their core competencies. Internet connection is the essential infrastructure in the current business environment. Service Providers provide the Internet connections to corporate networks. It processes network data to enable the Internet business communications and transactions. Mining the network data of a particular corporate network resulted in its business traffic profile or characteristics. Based on the discovered characteristics, this research proposes novel generic Value Added Services (VAS). The VAS becomes the innovative and competitive revenue generators. The VAS is competitive as only the Service Provider and its customer know the traffic profile. The knowledge becomes the barrier of entry for competitors. To offer the VAS, a Service Provider must build close relationship with its customer for acceptance.
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Khendek, Ferhat, and Tong Zheng. "Modeling and analysis of value added services using message sequence charts." Journal of Network and Computer Applications 31, no. 3 (August 2008): 338–56. http://dx.doi.org/10.1016/j.jnca.2006.08.001.

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28

Sripanidkulchai, Kunwadee, Andy Myers, and Hui Zhang. "A third-party value-added network service approach to reliable multicast." ACM SIGMETRICS Performance Evaluation Review 27, no. 1 (June 1999): 166–77. http://dx.doi.org/10.1145/301464.301553.

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29

Chandra, P., Y. H. Chu, A. Fisher, J. Gao, C. Kosak, T. S. E. Ng, P. Steenkiste, E. Takahashi, and H. Zhang. "Darwin: customizable resource management for value-added network services." IEEE Network 15, no. 1 (2001): 22–35. http://dx.doi.org/10.1109/65.898819.

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Cantelmo, Guido, and Francesco Viti. "A Big Data Demand Estimation Model for Urban Congested Networks." Transport and Telecommunication Journal 21, no. 4 (December 1, 2020): 245–54. http://dx.doi.org/10.2478/ttj-2020-0019.

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AbstractThe origin-destination (OD) demand estimation problem is a classical problem in transport planning and management. Traditionally, this problem has been solved using traffic counts, speeds or travel times extracted from location-based sensor data. With the advent of new sensing technologies located on vehicles (GPS) and nomadic devices (mobile and smartphones), new opportunities have emerged to improve the estimation accuracy and reliability, and more importantly to better capture the dynamics of the daily mobility patterns. In this paper we frame this new data in a comprehensive framework which estimates origin-destination flows in two steps: the first step estimates the total generated demand for each traffic zone, while the second step adjusts the spatial and temporal distribution on the different OD pairs. We show how mobile data can be used to obtain OD matrices that reflect the aggregated movements of individuals in complex and large-scale instances, while speed information from floating car data can be used in the second step. We showcase the added value of big data on a realistic network comprising Luxembourg’s capital city and its surrounding. We simulate traffic by means of a commercial simulation software, PTV-Visum, and leverage real mobile phone data from the largest telco operator in the country and real speed data from a floating car data service provider. Results show how OD estimation improves both in solution reliability and in convergence speed.
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Al-Sobhi, Saad, Ali Elkamel, Fatih Erenay, and Munawar Shaik. "Simulation-Optimization Framework for Synthesis and Design of Natural Gas Downstream Utilization Networks." Energies 11, no. 2 (February 3, 2018): 362. http://dx.doi.org/10.3390/en11020362.

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Many potential diversification and conversion options are available for utilization of natural gas resources, and several design configurations and technology choices exist for conversion of natural gas to value-added products. Therefore, a detailed mathematical model is desirable for selection of optimal configuration and operating mode among the various options available. In this study, we present a simulation-optimization framework for the optimal selection of economic and environmentally sustainable pathways for natural gas downstream utilization networks by optimizing process design and operational decisions. The main processes (e.g., LNG, GTL, and methanol production), along with different design alternatives in terms of flow-sheeting for each main processing unit (namely syngas preparation, liquefaction, N2 rejection, hydrogen, FT synthesis, methanol synthesis, FT upgrade, and methanol upgrade units), are used for superstructure development. These processes are simulated using ASPEN Plus V7.3 to determine the yields of different processing units under various operating modes. The model has been applied to maximize total profit of the natural gas utilization system with penalties for environmental impact, represented by CO2eq emission obtained using ASPEN Plus for each flowsheet configuration and operating mode options. The performance of the proposed modeling framework is demonstrated using a case study.
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32

Salem, Fatty M., Maged Hamada Ibrahim, and I. I. Ibrahim. "Efficient Noninteractive Secure Protocol Enforcing Privacy in Vehicle-to-Roadside Communication Networks." International Journal of Vehicular Technology 2012 (November 13, 2012): 1–8. http://dx.doi.org/10.1155/2012/862368.

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Vehicular ad hoc networks (VANETs) have attracted extensive attentions in recent years for their promises in improving safety and enabling other value-added services. In this paper, we propose an efficient noninteractive secure protocol preserving the privacy of drivers in vehicle-to-roadside (V2R) communication networks with the ability of tracing malicious drivers only by a third trusted party (TTP), who is assumed to be fully trusted. Our proposed protocol can provide these complex requirements depending on symmetric cryptographic algorithms. The drivers can change the symmetric key used for message encryption with each message transmission and find noninteractively new values to be correctly used for verification and tracing in case of malicious behavior. The advantages of symmetric cryptographic algorithms over asymmetric algorithms are the faster processing speed and the shorter message length which makes it suitable for real-time applications such as V2R communications. An efficient key revocation scheme will be also described.
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33

Fourati, Hedia, and Habib Affes. "Intellectual Capital Investment, Stakeholders' Value, Firm Market Value and Financial Performance: The Case of Tunisia Stock Exchange." Journal of Information & Knowledge Management 12, no. 02 (June 2013): 1350010. http://dx.doi.org/10.1142/s021964921350010x.

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The purpose of this paper is to investigate the role of intellectual capital investment in improving the firm's market value, stakeholders' value and financial performance. Using data drawn from 21 listed companies in Tunisia Stock Exchange, we conducted two studies. On one hand, from using Charreaux (Charreaux (2006). La valeur partenariale: Vers une mesure opérationnelle. Cahier de FARGO no. 1061103, November) measure of stakeholders' value, we demonstrate that financials come to present the weakest stakeholders' value and clients monopolises in term of value acquisition due to a weak ability of negotiation of firms. On the other hand, we construct a regression model of Pulic's value added intellectual capital investment (VAIC) as the measure of the value added from intellectual capital, in market valuation and financial performance. Our results stressed the fact that there is a positive impact of intellectual capital by human capital efficiency and capital employed efficiency on improving firm's market value. Nevertheless, financial performance measured by ROA is still justified by the traditional measure relying on capital employed efficiency. Indeed for Tunisian quoted firms, human capital investment is a pilar for ameliorating firm market valuation of financial performance.
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Boshkovski, Tommy, Ljupco Kocarev, Julien Cohen-Adad, Bratislav Mišić, Stéphane Lehéricy, Nikola Stikov, and Matteo Mancini. "The R1-weighted connectome: complementing brain networks with a myelin-sensitive measure." Network Neuroscience 5, no. 2 (2021): 358–72. http://dx.doi.org/10.1162/netn_a_00179.

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Abstract Myelin plays a crucial role in how well information travels between brain regions. Complementing the structural connectome, obtained with diffusion MRI tractography, with a myelin-sensitive measure could result in a more complete model of structural brain connectivity and give better insight into white-matter myeloarchitecture. In this work we weight the connectome by the longitudinal relaxation rate (R1), a measure sensitive to myelin, and then we assess its added value by comparing it with connectomes weighted by the number of streamlines (NOS). Our analysis reveals differences between the two connectomes both in the distribution of their weights and the modular organization. Additionally, the rank-based analysis shows that R1 can be used to separate transmodal regions (responsible for higher-order functions) from unimodal regions (responsible for low-order functions). Overall, the R1-weighted connectome provides a different perspective on structural connectivity taking into account white matter myeloarchitecture.
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WANG, Hong-man, He-wei WANG, Yu-zhang LIU, and Fang-chun YANG. "Design and implementation of SOLR-based information retrieval system for value-added service." Journal of China Universities of Posts and Telecommunications 15 (September 2008): 51–54. http://dx.doi.org/10.1016/s1005-8885(08)60154-5.

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Uba, Felix, Holali Kwami Apevienyeku, Freda Dapaa Nsiah, Alex Akorli, and Stephen Adjignon. "Energy Analysis of Commercial Buildings Using Artificial Neural Network." Modelling and Simulation in Engineering 2021 (March 11, 2021): 1–10. http://dx.doi.org/10.1155/2021/8897443.

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Energy consumption in buildings especially in offices is alarming and prompts the desire for more energy analysis work to be done in testing models that can estimate the energy situation of commercial buildings, and the key contributing factors are based on human factors, work load, and weather variables like solar radiation and temperature. In the research, the administration block of the University of Energy and Natural Resources, Ghana, was selected and modeled for energy analysis using SketchUp. Daily energy consumption of the building was generated with EnergyPlus indicating the electricity consumption of the block for the year 2018 for which 68.7% was used by equipment in the block, 26.98% on cooling, and the rest on lighting. The Artificial Neural Network model which had weather variable and days as input neurons and cooling, lighting, equipment, and total building electricity consumption as output neurons was modeled in MATLAB. The model after training had R values for training, validation, and testing to be 0.999 and validation performance of 1.7 ∗ 10 − 04 . It was able to predict the energy consumption for lighting, cooling, and equipment very close to the results with minimal. The results from the ANN model prediction were compared with the EnergyPlus simulations. The maximum deviation profile for the following parameters (lighting, cooling, and equipment) is 13%, 8%, and 4%, respectively. The large difference in the lighting and cooling is the difficulty involved in predicting human behaviour and weather conditions. The least value recorded for the equipment is due to its independence on external factors.
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Camarinha-Matos, Luis M., Ana Ines Oliveira, Filipa Ferrada, and Victor Thamburaj. "Collaborative services provision for solar power plants." Industrial Management & Data Systems 117, no. 5 (June 12, 2017): 946–66. http://dx.doi.org/10.1108/imds-06-2016-0246.

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Purpose The purpose of this paper is to support effective business services provision along the life cycle of complex service-enhanced products, such as the case of solar power plants, and to explore collaborative approaches for multi-stakeholder business services. Design/methodology/approach Design and implementation of adequate collaboration strategies and cloud-based support mechanisms to facilitate creation and management of collaborative networks in this sector. For this purpose, a conceptual framework, a cloud-based platform and a set of collaboration support tools are proposed. Validation is based on a pilot implementation and interactions with a large group of end users. Findings Validation results confirmed the suitability of the collaborative networks approach in this sector, which often involves multiple small and medium size enterprises. Originality/value The interplay between long-term strategic networks and goal-oriented collaborative networks and their interaction with the various phases of the product-services life cycle correspond to a novel approach in this sector, traditionally focused on a sub-contracting model. This opens new opportunities for enhancing the value of complex products through collaborative value-added services. Of particular relevance is also the adoption of collaborative approaches for service co-creation.
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Kabel, Suzanne, Robert de Hoog, Bob J. Wielinga, and Anjo Anjewierden. "The added value of task and ontology-based markup for information retrieval." Journal of the American Society for Information Science and Technology 55, no. 4 (2004): 348–62. http://dx.doi.org/10.1002/asi.10379.

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Saxena, Neetesh, Mauro Conti, Kim-Kwang Raymond Choo, and Narendra S. Chaudhari. "BAS-VAS: A Novel Secure Protocol for Value Added Service Delivery to Mobile Devices." IEEE Transactions on Information Forensics and Security 15 (2020): 1470–85. http://dx.doi.org/10.1109/tifs.2019.2940908.

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Qin, Ning-ning, and Jia-le Chen. "An area coverage algorithm for wireless sensor networks based on differential evolution." International Journal of Distributed Sensor Networks 14, no. 8 (August 2018): 155014771879673. http://dx.doi.org/10.1177/1550147718796734.

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Lifetime requirements and coverage demands are emphasized in wireless sensor networks. An area coverage algorithm based on differential evolution is developed in this study to obtain a given coverage ratio [Formula: see text]. The proposed algorithm maximizes the lifetime of wireless sensor networks to monitor the area of interest. To this end, we translate continuous area coverage into classical discrete point coverage, so that the optimization process can be realized by wireless sensor networks. Based on maintaining the ε-coverage performance, area coverage algorithm based on differential evolution takes the minimal energy as optimization objective. In area coverage algorithm based on differential evolution, binary differential evolution is redeveloped to search for an improved node subset and thus meet the coverage demand. Taking into account that the results of binary differential evolution are depended on the initial value, the resulting individual is not an absolutely perfect node subset. A compensation strategy is provided to avoid unbalanced energy consumption for the obtained node subset by introducing the positive and negative utility ratios. Under the helps of those ratios and compensation strategy, the resulting node subset can be added additional nodes to remedy insufficient coverage, and redundancy active nodes can be pushed into sleep state. Furthermore, balance and residual energy are considered in area coverage algorithm based on differential evolution, which can expand the scope of population exploration and accelerate convergence. Experimental results show that area coverage algorithm based on differential evolution possesses high energy and computation efficiencies and provides 90% network coverage.
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Qiu, Zirou, Ruslan Shaydulin, Xiaoyuan Liu, Yuri Alexeev, Christopher S. Henry, and Ilya Safro. "ELRUNA." ACM Journal of Experimental Algorithmics 26 (July 8, 2021): 1–32. http://dx.doi.org/10.1145/3450703.

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Networks model a variety of complex phenomena across different domains. In many applications, one of the most essential tasks is to align two or more networks to infer the similarities between cross-network vertices and to discover potential node-level correspondence. In this article, we propose ELRUNA ( el imination ru le-based n etwork a lignment), a novel network alignment algorithm that relies exclusively on the underlying graph structure. Under the guidance of the elimination rules that we defined, ELRUNA computes the similarity between a pair of cross-network vertices iteratively by accumulating the similarities between their selected neighbors. The resulting cross-network similarity matrix is then used to infer a permutation matrix that encodes the final alignment of cross-network vertices. In addition to the novel alignment algorithm, we improve the performance of local search , a commonly used postprocessing step for solving the network alignment problem, by introducing a novel selection method RAWSEM ( ra ndom- w alk-based se lection m ethod) based on the propagation of vertices’ mismatching across the networks. The key idea is to pass on the initial levels of mismatching of vertices throughout the entire network in a random-walk fashion. Through extensive numerical experiments on real networks, we demonstrate that ELRUNA significantly outperforms the state-of-the-art alignment methods in terms of alignment accuracy under lower or comparable running time. Moreover, ELRUNA is robust to network perturbations such that it can maintain a close-to-optimal objective value under a high level of noise added to the original networks. Finally, the proposed RAWSEM can further improve the alignment quality with a smaller number of iterations compared with the naive local search method. Reproducibility : The source code and data are available at https://tinyurl.com/uwn35an.
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Thomas, Oliver, Philipp Walter, Nadine Blinn, and Michael Schlicker. "IT-supported value-added chains for the integration of products and services." International Journal of Internet Manufacturing and Services 2, no. 1 (2009): 43. http://dx.doi.org/10.1504/ijims.2009.031339.

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43

Mas’ud, Arifuddin, Sapto Raharjo, Weka Gusmiarty Abdullah, Emilia Nurdin, and Santiadji Mustafa. "Peningkatan Keterampilan bagi Pengelola dan Anggota Badan Usaha Milik Desa di Desa Amokuni, Kecamatan Ranomeeto Barat, Kabupaten Konawe Selatan, Sulawesi Tenggara." Agrokreatif: Jurnal Ilmiah Pengabdian kepada Masyarakat 7, no. 1 (March 23, 2021): 56–66. http://dx.doi.org/10.29244/agrokreatif.7.1.56-66.

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The objective of this community service activity are to increase knowledge and skills to managers and members of Amokuni Village Owned Enterprise (Bumdes Amokuni) regarding business management, added value, determining the cost of goods manufactured (HPP), and creative marketing strategies. Activities carried out include socialization, extention, training and mentoring. The result of this service activity was that the knowledge and skills of the managers and members of Bumdes Amokuni have increased. Increased knowledge was meant in terms of business management, increasing the added value of freshwater resources, HPP determining and creative marketing strategies for freshwater fish products to be produced. Improved skills were in the form of skills in making business management concepts, processing pomfret and tilapia into shredded fish and fishbone sticks with 5 flavors (original taste, BBQ, spicy sweet, balado, and roasted corn), HPP determining, and marketing diversified products freshwater fish online and offline.
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Archer, A. Ainsley, Peter Thorburn, Phil Hobson, and Andrew Higgins. "Evaluating alternate strategic options for agricultural value chains." Journal on Chain and Network Science 8, no. 2 (January 1, 2008): 131–41. http://dx.doi.org/10.3920/jcns2008.x095.

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Making strategic innovations to agricultural value chains can be difficult. Complex biophysical and logistical interactions make a priori estimates of chain-wide impacts difficult. This paper gives the results of applying an agent-based, value chain modelling framework, developed and applied in participation with stakeholders in three sugar mill case studies, which evaluated the viability of maximising the co-generation of electricity by harvesting the whole crop (i.e. cane leaves as well as stalk). The existing practice of harvesting predominantly cane stalk (as in the 2003 production year) was the base case for comparing a scenario where electricity co-generation (from crop residues) was an added revenue stream. Increased revenues were compared to costs within sectors as per changes in biophysical flows for the grower, harvesting, transport and milling segments in the chain. In general, predicted impacts on the farming and milling sectors were greater than anticipated by stakeholders, while the impacts on the harvesting and transport sectors were less than anticipated because of increased logistical efficiency possible in the sectors. A virtual experience of their supply chain facilitated more complete knowledge transfer about possible impacts of whole-crop harvesting to managers across the chain and thus increased their capacity to evaluate innovative business models involving the co-generation of electricity.
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Salanova Grau, Josep Maria, Evangelos Mitsakis, Panagiotis Tzenos, Iraklis Stamos, Luigi Selmi, and Georgia Aifadopoulou. "Multisource Data Framework for Road Traffic State Estimation." Journal of Advanced Transportation 2018 (June 19, 2018): 1–9. http://dx.doi.org/10.1155/2018/9078547.

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This paper presents a framework for data collection, filtering, and fusion, together with a set of operational tools to validate, analyze, utilize, and highlight the added value of probe data. Data is collected by both conventional (loops, radars, and cameras) and innovative (Floating Car Data, detectors of Bluetooth devices) technologies and refers to travel times and traffic flows on road networks. The city of Thessaloniki, Greece, serves as a case study for the implementation of the proposed framework. The methodology includes the estimation of traffic flow based on measured travel time along predefined routes and short-term forecasting of traffic volumes and their spatial expansion in the road network. The proposed processes and the framework itself have the potential of being implemented in urban road networks.
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Marqués-Sánchez, García-Rodríguez, Benítez-Andrades, Portillo, Pérez-Paniagua, and Reguera-García. "A Cooperative Interdisciplinary Task Intervention with Undergraduate Nursing and Computer Engineering Students." Sustainability 11, no. 22 (November 11, 2019): 6325. http://dx.doi.org/10.3390/su11226325.

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: This study proposed a collaborative methodology among university students in different grades in order to find sustainable strategies that are an added value for students, teachers, and society. In daily professional practice, different professionals must develop skills to collaborate and understand each other. For that reality to be sustainable, we believe that experiences must begin in the context of higher education. Social network analysis offers a new perspective on optimizing relationships between university students. The main goal of this study was to analyze students’ behavior in their networks following an educational intervention and the association with academic performance, resilience and engagement. This was a descriptive quasi-experimental study with pre–post measures of a cooperative interdisciplinary intervention. Participants comprised 50 nursing and computer engineering students. We measured help, friendship, and negative network centrality, engagement, resilience, and academic performance. No significant differences were observed between pre–post-intervention centrality measures in the negative network. However, the help and friendship networks presented statistically significant differences between inDegreeN, OutDegreeN and EigenvectorN on the one hand, and resilience and engagement—but not academic performance—on the other. Academic performance was solely associated with the team to which participants belonged. Cooperative interdisciplinary learning increased the number of ties and levels of prestige and influence among classmates. Further research is required in order to determine the influence of engagement and resilience on academic performance and the role of negative networks in network formation in education. This study provides important information for proposals on sustainable assessments in the field of higher education.
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Li, Shanshan, Li Zhao, and Na Yang. "Medical Image Encryption Based on 2D Zigzag Confusion and Dynamic Diffusion." Security and Communication Networks 2021 (May 7, 2021): 1–23. http://dx.doi.org/10.1155/2021/6624809.

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For the security of medical image, a new algorithm of medical image encryption is designed. The novel algorithm is based on a chaotic system composed of the two-dimensional Sine Logistic modulation map (2D-SLMM) and the two-dimensional Hénon-Sine map (2D-HSM). The main encryption procedure includes zigzag scan scramble, pixel grey value transformation, and dynamic diffusion. On the pixel grey value transformation stage, a password feedback is added. This makes the relationship between password and key more complicated. The proposed scheme is lossless for medical image encryption and decryption. It avoids the problems of low-dimensional chaotic map such as narrow interval and few parameters, as well as the problem of the special texture and contour of medical images. The key space of the novel algorithm is big enough, and the encryption and decryption processing are sensitive to the key. Simulation and experiments validate the effectiveness and efficiency of the novel algorithm. Security analysis proves the algorithm is resistant to common attacks.
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Mark-Herbert, Cecilia. "Strategies for collaboration in new product development." Journal on Chain and Network Science 5, no. 2 (December 1, 2005): 65–72. http://dx.doi.org/10.3920/jcns2005.x056.

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In the past decades Swedish food companies have faced increasing competition. One way of gaining competitive advantage is to find new ways of creating added value based on technological development. This may lead to the production of valueadded products, profits from licensing agreements and a boost for the company image. Businesses that want to succeed in this market also need to develop new managerial methods, in particular in identifying critical technologies and strategic collaboration partners. The presented case studies provide examples of building internal skills, employing innovative external sourcing, developing new markets with strong brands and establishing networks and alliances for new product development.
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Moreno-Sader, Kariana Andrea, Jairo Martínez-Consuegra, and Ángel Darío González-Delgado. "An integrated biorefinery approach via material recycle/reuse networks for the extraction of value-added components from shrimp: Computer-aided simulation and environmental assessment." Food and Bioproducts Processing 127 (May 2021): 443–53. http://dx.doi.org/10.1016/j.fbp.2021.04.003.

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Cao, Shihua, Xin Lin, Keyong Hu, Lidong Wang, Wenjuan Li, Mengxin Wang, and Yuchao Le. "Cloud Computing-Based Medical Health Monitoring IoT System Design." Mobile Information Systems 2021 (July 7, 2021): 1–12. http://dx.doi.org/10.1155/2021/8278612.

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With the continuous improvement of the national medical system, health monitoring combined with cloud computing and Internet of Things has become a concern. This study mainly discusses the design of the medical health monitoring IoT system based on cloud computing. From the user to the health service provider, there are three devices: sensor terminal, gateway terminal, and service platform. The sensor terminal is used to measure physiological indicators, such as blood pressure, electrocardiogram, blood oxygen saturation, heart rate, and other physiological indicators; the gateway terminal is used to link the sensor terminal to receive physiological indicators and forward them to the business platform; the gateway is also used to receive health information and other instructions issued by the server. In the community service mode, users can be divided into groups according to the community and region, and the corresponding service doctors and agent customer service personnel (nurses) can be assigned. Users can collect personal physiological indicators at home or outside through the medical terminal. These indicators and information are transmitted to the background health platform system through the mobile GSM-TD communication network. Users can also view their own historical health records and opinions of health consultants through the web/WAP website. Through the integration ability of the health cloud platform, relying on the interconnection with HIS, LIS, and other information systems of professional medical institutions, we jointly operate special value-added services, such as appointment registration, maternal and child healthcare, and medical communication (doctor-patient interaction), so that users can enjoy the remote service and guidance of professional medical institutions by subscribing to health value-added services. The CPU utilization rate is 40%, the internal utilization rate is 7.44 G, the memory utilization rate is 11.8%, and the network bandwidth is 591.87 M. During the whole test process, the indicators are stable, and there are no restart, crash, and other phenomena, so the system performance meets the design requirements.
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