2018 Open Innovations Conference (OI)最新文献

{"title":"Demand Side Management of Grid- Tied Hybrid Photovoltaic-Diesel-Battery Energy System for a University Engineering Building","authors":"L. Moji, K. Kusakana, B. Numbi","doi":"10.1109/OI.2018.8535866","DOIUrl":"https://doi.org/10.1109/OI.2018.8535866","url":null,"abstract":"The increasing electricity costs of the university engineering buildings has created a need for the review of the work done in the demand side management of grid-tied hybrid energy systems for commercial buildings. This paper proposes the architecture of an on-site grid-tied hybrid Photovoltaic/Diesel generator/Battery storage energy system for a university engineering building under time of use pricing considering maximum demand charge. The paper also identifies further research work.","PeriodicalId":331140,"journal":{"name":"2018 Open Innovations Conference (OI)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115106677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inscribed Themes Aligning Actors' Interests to Influence M-Learning Readiness in Higher Education","authors":"V. Paledi, P. Alexander","doi":"10.1109/OI.2018.8535961","DOIUrl":"https://doi.org/10.1109/OI.2018.8535961","url":null,"abstract":"This study looks at factors influencing m-learning readiness in a developing country and was conducted in three South African universities. It considers prerequisite strategies recommended by the students, lecturers and nonacademic staff members, using actor network theory (ANT). Hence, the paper explains how certain perceived prerequisites assist in the future adoption and sustained use of m-Iearning, provided they are adequately inscribed in actors (particularly the m-Iearning policy). The paper argues that policies need to address issues relating to actors' skills, availability of technology, documentation of end-users' requirements, design and presentation of content, funding, communication of benefits including evidence of positive return on investment, reward strategies, and application ease of use (relating to development strategies) if the university is to be e-ready. By inscribing these factors in m-Iearning policy, they become visible and hence assist in aligning actors' interests within the m-Iearning readiness actor network. The scope of this paper was limited to the inscription concept rather than a full discussion of ANT concepts (identifying of actors and their relationships). The findings of this study can be used by institutions of higher education as a reference point to improve their planning for m-Iearning project implementation, usage and adoption, within their various contexts. Theoretically, this paper expands the literature on the use of ANT to underpin information systems (IS) research, specifically m-Iearning readiness.","PeriodicalId":331140,"journal":{"name":"2018 Open Innovations Conference (OI)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121578981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structuring of the Terrorism Problem in the Digital Age: A Systems Perspective","authors":"N. Odhiambo, N. Ochara, Amstrong Kadymatimba","doi":"10.1109/OI.2018.8535619","DOIUrl":"https://doi.org/10.1109/OI.2018.8535619","url":null,"abstract":"Terrorism is a global challenge of the 21st century. The Kenya Westgate Mall attack and Garrissa University attacks in 2015 and the Libya suicide bombings, did not only claim the lives of many, but also had great political consequences. The advancements, ease of access and availability of information and communication technologies (ICT) is blamed for the increases in terrorist attacks: for instance, the Internet and especially, social media. This is because through the Internet, terrorist organizations such as ISIS have come up with innovative ways to recruit new members, to train and even disseminate ideologies. However, the terrorist opponents (counter-terrorism organizations) also have developed innovative counter-measures using ICT. Therefore, understanding and structuring terrorism in this digital age has enhanced the complexity in addition to multiple stakeholders involved in terrorism related incidences, intertwined causal-relationships, and the uncertainties in the mode of operandi of the terrorists. In this study, theory of synergetics is applied both as a theoretical and methodological approach to try structure the terrorism problem. Secondary data sources such as journal articles on terrorism related incidences and search terms (i.e. terrorism AND technology, terrorism AND Internet), were used by the researchers' to identify and include relevant documents in the study. Following the inclusion and exclusion criteria, the researchers remained with only 405 documents from which using the qualitative software Nvivo, a word cloud was developed to pictorially visualize the terrorism problem. Thereafter, relying on synergetics and using results from the word cloud, the researchers' were able to create a conceptual model. The findings from the analysis of the conceptual model showed that technology plays a critical role in the fight against terrorism as it appears to be part of each of the various components of synergetics, namely, order parameters, system elements, internal and external constraints, control parameters and environment. Thus, it is quite clear that in terrorism structuring in this digital age can be quite challenging.","PeriodicalId":331140,"journal":{"name":"2018 Open Innovations Conference (OI)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132691670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Smart System for Impressed Current Cathodic Protection Running on Hybrid Renewable Energy","authors":"C. A. Sibiya, K. Kusakana, B. Numbi","doi":"10.1109/OI.2018.8535796","DOIUrl":"https://doi.org/10.1109/OI.2018.8535796","url":null,"abstract":"The primary objective of this paper is to propose a system for Impressed Current Cathodic Protection running on renewable energy. Generally additional corrosion prevention based on sacrificial anodes, Impressed Current Cathodic Protection and Alternating Current mitigation are installed into underground/ buried pipelines to provide protection against accelerated corrosion to the part of the pipeline that becomes unprotected by a result of degraded coating and stray currents. In this research, studies to determine the amount of power required to shift the potential level of the buried pipeline will be outlined, this will clearly show the load profile of the structure to be protected and from there a hybrid system shall be designed and modelled. This document outlines the reason for hybrid powered Impressed Current Cathodic Protection, objectives of the research and how they will be achieved.","PeriodicalId":331140,"journal":{"name":"2018 Open Innovations Conference (OI)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132865921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rollover Prevention and Path Following of Autonomous Vehicle Using Nonlinear Model Predictive Control","authors":"Isaacs Gwayi, M. Tsoeu","doi":"10.1109/OI.2018.8535896","DOIUrl":"https://doi.org/10.1109/OI.2018.8535896","url":null,"abstract":"Autonomous Ground Vehicles (AGVs) may be at risk of dangerous rollover if they operate without taking roll motion into consideration. In this paper we present a Nonlinear Model Predictive Control (NMPC) approach for combined braking and steering systems in AGV s. We formulate a predictive control problem in order to best follow a given path at maximum optimal speed by controlling the front steering angle and the brakes at the wheels, while fulfilling roll angle, yaw-rate and physical constraints to maintain vehicle stability. Open Source Software (OSS) known as Automatic Control and Dynamic Optimization (ACADO) is used to design and simulate the NMPC controller based on an eight Degrees of Freedom (8 DOF) nonlinear vehicle model. The simulation results show that the controller is able to track a given trajectory while preventing the vehicle from rolling over and spinning out by respecting given constraints. A maximum velocity of 6 m/s is observed when roll angle constraint is not active, and a minimum velocity of 4.32 m/s is observed when roll angle constraint is active.","PeriodicalId":331140,"journal":{"name":"2018 Open Innovations Conference (OI)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133245027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly Accurate and Inexpensive Computational Tool for Improving Photovoltaic Arrays Performance and Efficiency Measures","authors":"Héctor L. Nuñez Ramirez, Gloria G. Carvalho Kassar, Freddy C. Brito Maestre, Yaremi I. Gamboa Maldonado, Luis A. Santos Avendano, Carlelines Gavidia Toro","doi":"10.1109/OI.2018.8535899","DOIUrl":"https://doi.org/10.1109/OI.2018.8535899","url":null,"abstract":"This work shows the results of a computational tool that allows to simulate the behavior of arrays of photovoltaic cells, under the physical model of two diodes. To reach this, the I-V curves by experimental way have been obtained, in order to know relevant parameters of the array: open-circuit voltage, short-circuit current, maximum voltage and current. These four parameters will be the input data in SCILAB, which solves the non-linear equations under the selected model, and from there, the coefficients of the equations that describes the behavior I-V of the photovoltaic array under test were obtained. A highly precise and inexpensive computational tool has been implemented to evaluate the efficiency of the array for any values of solar irradiance and temperature.","PeriodicalId":331140,"journal":{"name":"2018 Open Innovations Conference (OI)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134361701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Adaptive Framework for Recommender-Based Learning Management Systems","authors":"Munyaradzi Maravanyika, N. Dlodlo","doi":"10.1109/OI.2018.8535816","DOIUrl":"https://doi.org/10.1109/OI.2018.8535816","url":null,"abstract":"There are a number of existing frameworks for recommendation systems that have been identified in domains such as e-commerce and tourism. The aspects of user profiles, adaptation and group models from the e-commerce and tourism frameworks can be applied to education provided they are customised through incorporating principles of pedagogy such as behavioural theories. Recommendation systems can be adopted to support personalised / differentiated teaching and learning. The aim of this research is to develop an adaptive recommender-systems-based framework for differentiated teaching and learning on eLearning platforms, that is, learning management systems (LMS). Through a literature review, 40 attributes of personalized learning were identified. The Multi-Attribute Utility Theory (MUAT) was used to identify the 10 top attributes to go in as personalized learning framework components. From a population of 1203 students from College X, a sample of 200 students was purposively selected for the research on the basis of their familiarity with College X's eLearning system. 103 students responded to the questionnaire, representing a response rate of 52%. From the responses of the students, the following top ten (10) attributes were identified for inclusion in the personalised learning platforms: culture, emotional/mental state, socialisation, motivation, learning preferences, prior knowledge, educational background, learning/cognitive style, and navigation and learning goals. A theory-driven adaptive recommender-based framework was derived from a combination of literature review and the attributes derived from the research.","PeriodicalId":331140,"journal":{"name":"2018 Open Innovations Conference (OI)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114986889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy Management of a Grid-Intergrated Hybrid Peer-to-Peer Renewable Charging Station for Electric Vehicles","authors":"L. Bokopane, K. Kusakana, H. Vermaak","doi":"10.1109/OI.2018.8535881","DOIUrl":"https://doi.org/10.1109/OI.2018.8535881","url":null,"abstract":"Electric vehicles are fast becoming a popular site in the world. Their technologies have been widely developed over the years. However, their charging infrastructure is still a subject of interest, as most of the electric vehicle charging requirements were previously met by an AC grid. However, over the year's research has been conducted on the implementation of renewable energies in the charging station. Most of the research studies focus on the management, optimal control, charging schemes and charging strategies. There is no research done on a charging station that combines the grid integrated hybrid renewable energy system such as Wind and PV comprising of a central battery bank with a peer to peer energy trading model. The aim of this research study is to develop a well-coordinated charging scheme of Electric vehicles in a charging station whilst optimally managing the charging and discharging of the central battery bank (used for energy storage) as well as the power dispatch of the grid and Wind and PV charging station. The proposed model will maximize electric vehicle user satisfaction that meets all the charging requirements of the charging station whilst offering cost effective charging scheme such as peer-to-peer energy sharing model.","PeriodicalId":331140,"journal":{"name":"2018 Open Innovations Conference (OI)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131635152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of Solid State Reactions of Pd Films on Single-Crystal 6H-SiC","authors":"E. Njoroge, J. T. Kabini, M. Mlambo, T. Ntsoane, T. Hlatshwayo, J. Malherbe","doi":"10.1109/OI.2018.8535764","DOIUrl":"https://doi.org/10.1109/OI.2018.8535764","url":null,"abstract":"The solid state reactions between Pd films deposited by resistive evaporation on 6H-SiC substrates have been investigated by Rutherford backscattering spectrometry (RBS) scanning electron microscopy (SEM), Raman spectroscopy and glancing-incidence xray diffraction (GIXRD). The deposited films were subsequently annealed from 200 to 800°C in vacuum. At room temperature, no silicides were detected to have formed at the Pd/SiC interface. The as-deposited Pd films formed a flat and chemically inert interface with SiC. After annealing at 400°C, a reaction zone was formed between Pd and 6H-SiC. The initial phase to form in the Pd-SiC samples were Pd4Si and Pd3Si. After annealing the Pd/SiC samples at 600°C, the contact structure consists of unreacted Pd, Pd3Si and carbon. During annealing at 700°C and 800 °C, Pd film had completely reacted with SiC resulting in a reaction zone consisting of Pd2Si and C in a graphite state. Raman analysis of the Pd-SiC samples annealed in a vacuum at 700 and 800 °C showed clear D and G carbon peaks which was evidence of formation of graphite at the surface of the Pd/SiC samples.","PeriodicalId":331140,"journal":{"name":"2018 Open Innovations Conference (OI)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134263091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Impacts of Increased Penetration of Distributed Generators on the Namibian Grid Stability","authors":"A. Simeon, T. Wanjekeche","doi":"10.1109/OI.2018.8535966","DOIUrl":"https://doi.org/10.1109/OI.2018.8535966","url":null,"abstract":"This paper presents the study of the impact of increased penetration of distributed generators on the Namibian grid stability. The study mainly focused on the impacts of Distributed Generators (DG's) on the grid voltage stability and overall grid power losses with wind and solar as the main DG's. Simulation was done using DigSILENT PowerFactory software. The study had been carried out under four scenarios, at 0% DG penetration (base case), 13.65% DG penetration level (considering the already existing DG's), 39.63% DG penetration level (considering the DG's that are yet to be commissioned) and the 4th simulation scenario considered mitigation measures where a shunt reactor was incorporated for reactive power compensation. In this study it had been found that an increase in DG penetration level resulted into an increase in the bus voltages beyond the upper limit of 1.05 p.u. and a decrease in grid overall active power losses from 54.38 MW to 36.83 MW. With the mitigation measures, all bus voltage had been maintained within the permissible range of 0.95 to 1.05 p.u.","PeriodicalId":331140,"journal":{"name":"2018 Open Innovations Conference (OI)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126524308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}