2,379 research outputs found

    Developing Real Time Tracking of User Behavior, with Google Analytics for Mobile Phone Devices

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    Sony Mobile has a quite large internal user group with the purpose of investigating the usability of their mobile devices. The Telephony Domain was using among other techniques usability testing to evaluate the usability of their products. The performed conventional usability testing has its limitations e.g. the controlled test environment cannot fully represent real life setting and it’s very expensive in terms of time and resources. This ultimately results in less test persons and potentially biased results. These drawbacks cannot be overlooked when it comes to determining the next software release influencing millions of mobile device users. The purpose of this thesis work was to accommodate this problem by examining real time tracking of user behavior and interaction with mobile devices. By utilizing Google Analytics in the Telephony Domain, we could autonomously gather large quantity of real user behavior data from a natural environment. The investigation resulted in the conclusion that Google Analytics & Google Tag Manager solely weren’t sufficient for our purposes in aiding information for user behavior. To account for this, a tool were developed that were to be called Usage Tracker. Usage Tracker works as a complement to Google Analytics & Google Tag Manager by providing further functionality e.g. finding out how many users are using a feature and how these events are distributed over the users. The resulting statistics from Usage Tracker is also presented in a more intuitive way for easy interpretation. Furthermore, a direct consequence of using Usage Tracker is that less data traffic will be required.Sony Mobile has a quite large internal user group with the purpose of investigating the usability of their mobile devices. The Telephony Domain was using among other techniques usability testing to evaluate the usability of their products. The performed conventional usability testing has its limitations e.g. the controlled test environment cannot fully represent real life setting and it’s very expensive in terms of time and resources. This ultimately results in less test persons and potentially biased results. These drawbacks cannot be overlooked when it comes to determining the next software release influencing millions of mobile device users. The purpose of this thesis work was to accommodate this problem by examining real time tracking of user behavior and interaction with mobile devices. By utilizing Google Analytics in the Telephony Domain, we could autonomously gather large quantity of real user behavior data from a natural environment. The investigation resulted in the conclusion that Google Analytics & Google Tag Manager solely weren’t sufficient for our purposes in aiding information for user behavior. To account for this, a tool were developed that were to be called Usage Tracker. Usage Tracker works as a complement to Google Analytics & Google Tag Manager by providing further functionality e.g. finding out how many users are using a feature and how these events are distributed over the users. The resulting statistics from Usage Tracker is also presented in a more intuitive way for easy interpretation. Furthermore, a direct consequence of using Usage Tracker is that less data traffic will be required

    Is there still a role for small wind in rural electrification programmes?

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    In the right context, Small Wind Turbines (SWTs) can offer a valuable complement to solar photovoltaics (PV) or diesel generators, offering diversity in power generation sources and the potential for local manufacture. However, the biggest challenges facing small wind are the high variability in the wind resource (in both space and time) and the high maintenance requirements of SWTs. What is more, PV prices have fallen dramatically in the last decade, resulting in the proliferation of an array of desirable and highly modular solar solutions, such as solar lanterns and Solar Home Systems (SHS). Consequently, outside of high wind regions, SWTs are now rarely directly economically competitive against solar PV. Going forward, SWTs are still likely to have a role to play, but in niche contexts and as a complimentary addition to hybridise solar PV or diesel systems, rather than as a standalone alternative. Market assessments are an essential first step to determine the relative viability of PV-wind or wind-diesel hybrid systems with PV or diesel systems in particular contexts. In favourable regions, the high maintenance requirements of SWTs can be tackled by providing stable institutional support to empower local champions, establish a decentralised maintenance network and foster the development of a local small wind industry. End users and local technicians should be empowered to carry out as much maintenance as they are able/willing to, especially in remote regions, where frequent long maintenance trips are likely to lead small wind electrification programmes to failure. Sustainable business models should focus on productive applications and addressing the weaknesses of diesel and/or solar generation through hybridisation

    MPC-Controlled Virtual Synchronous Generator to Enhance Frequency and Voltage Dynamic Performance in Islanded Microgrids

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    How solar household systems contribute to resilience

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    This paper explores the relationship between the energy services provided by solar household devices, and the resilience of their users to climate change

    Potential Usage of Rice Husk Ash-Cement Based Soil in Subbase and Base Courses in Road Construction

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    This paper presents an experimental study of rice husk ash-cement-based soil for layers in roadway construction. Rice husk ash (RHA) used in this study is a by-product of rice milling. In this work, twelve proportion mixes were used in this work with varying quantities of RHA (0-30%) and Portland cement blended amounts of 4, 6, 8%. The specimens were prepared by the Proctor mould method, conditioned at room temperature, and tested in soaked and unsoaked conditions. Specified curing periods of 7, 14, 28 days were applied for all types of specimens. Some engineering tests were carried out such as proctor compaction, unconfined compressive strength, splitting tensile strength, and the stiffness of stabilized soil. Test results indicated a general decrease in the maximum dry density (MDD) and increased optimum moisture content (OMC) with an increase in RHA content. Adding cement and RHA significantly improved the geotechnical properties of stabilized soils, including compressive strength, splitting tensile strength, elastic modulus. In addition, the combination of 80% soil and 20% RHA and 6% cement can be used as the optimum proportion which satisfied the grade 3 of soils stabilized with inorganic adhesive substances, chemical agents, or reinforced soil for road construction, as indicated in the current Vietnamese standard

    Potential Usage of Rice Husk Ash-Cement Based Soil in Subbase and Base Courses in Road Construction

    Get PDF
    This paper presents an experimental study of rice husk ash-cement-based soil for layers in roadway construction. Rice husk ash (RHA) used in this study is a by-product of rice milling. In this work, twelve proportion mixes were used in this work with varying quantities of RHA (0-30%) and Portland cement blended amounts of 4, 6, 8%. The specimens were prepared by the Proctor mould method, conditioned at room temperature, and tested in soaked and unsoaked conditions. Specified curing periods of 7, 14, 28 days were applied for all types of specimens. Some engineering tests were carried out such as proctor compaction, unconfined compressive strength, splitting tensile strength, and the stiffness of stabilized soil. Test results indicated a general decrease in the maximum dry density (MDD) and increased optimum moisture content (OMC) with an increase in RHA content. Adding cement and RHA significantly improved the geotechnical properties of stabilized soils, including compressive strength, splitting tensile strength, elastic modulus. In addition, the combination of 80% soil and 20% RHA and 6% cement can be used as the optimum proportion which satisfied the grade 3 of soils stabilized with inorganic adhesive substances, chemical agents, or reinforced soil for road construction, as indicated in the current Vietnamese standard

    Study and application of Symphonie model to compute the hydrodynamic processes in the East Sea

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    Hydrodynamic processes in the East Sea have been studied by many Vietnamese and foreign scientists applying the models as advanced tools with low cost and spatial and temporal synchronized dataset to serve their research. However, applying the model to study variability of small and medium structures with very high resolution (a few kilometers) is still challenge for scientists. With the advantages of high quality real-time data, open source hydrodynamic model, and the support from high performance computer (HPC) systems, we have step by step studied and developed the numerical model for study on hydrodynamic fields in the East Sea. The model was validated with high resolution satellite data as well as in-situ data from the ARGO and research vessels. Initial results of the simulation are very good for the surface seawater temperature (SST) field in the East Sea

    COMPARING NERVE BLOCK PAIN PUMPS TO STANDARD OF CARE IN PATIENTS FOLLOWING CARDIOTHORACIC SURGERY

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    INTRODUCTION: Post-operative pain management following cardiothoracic surgery (CTS) can be challenging. Although opioids are commonly prescribed, multimodal strategies are used to decrease opioid consumption. One strategy includes the use of local anesthetics via peripheral nerve block pain pumps (PNBPP). However, literature in CTS patients is limited and conflicting. This study evaluated the efficacy and safety of PNBPP in patients following CTS. METHODS: This was a quasi-experimental study that included adult patients admitted to the cardiac intensive care unit following CTS. The intervention group included those who received PNBPP and they were compared to a group that received standard of care (SOC). The primary endpoint was the total oral morphine milligram equivalents (MMEs) used in the four days following surgery. Secondary endpoints included adverse events, incidence of post-operative ileus, time to first bowel movement, pain scores, length of stay and cost of intervention. Statistical analysis was performed with Chi-square, Fisher\u27s exact, Mann-Whitney U and t-tests where appropriate (IBM SPSS Statistics Software version 28.0.1.1). A sample size of 126 was calculated to detect a 50% reduction in opioid consumption with an alpha of 0.05 and power of 80%. RESULTS: Baseline characteristics were similar between groups with a median age of 60 and 63 in the PNBPP and SOC groups, respectively. The majority of patients were male and had a coronary artery bypass graft performed. Median oral MMEs was 375 (IQR: 268.5, 457.5) in the SOC group compared to 304.5 (IQR: 240, 416) in the PNBPP group (p-value 0.189). When comparing the SOC and PNBPP groups, incidence of post-operative ileus was 2 (3.2%) and 12 (19%) (p-value 0.005) with median time in hours to first bowel movement of 68.38 (IQR: 50.31, 85.50) and 66.11 (IQR: 50.28, 76.13) (p-value 0.336). There was no significant difference between groups in pain scores or length of stay. Median cost (USD) of PNBPP therapy was 125inthosethatreceivedanelectronicpumpand125 in those that received an electronic pump and 3,138 in those that received an elastomeric pump. CONCLUSIONS: Addition of PNBPP post-CTS did not significantly reduce opioid consumption compared to SOC. Larger studies are needed to better define the role of PNBPP in post-operative pain management following CTS

    Experimental Performance of Fiberglass Geogrid in Asphalt Pavements

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    This study performed an experimental investigation of asphalt concrete with and without fiberglass geogrid reinforcement, using specimens in the laboratory and in situ. A 100kN/m fiberglass geogrid was used. The results showed that with the fiberglass geogrid reinforcement, the flexural strength of the asphalt increased by 24.82%, deformation was significantly reduced, and the elastic modulus did not improve significantly. In addition, using the Hamburg Wheel Tracker test, the fiberglass geogrid reinforced asphalt samples had a 7.41%reduced rutting depth. Finally, two segments in situ were also tested showing that the flexural strength of asphalt concrete increased by 24.27% and the structural strength of the pavement increased by 25.24%. These results show that pavement structures are significantly improved when reinforced with fiberglass geogrid

    The Evolution of Plasma Composition during a Solar Flare

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    We analyze the coronal elemental abundances during a small flare using Hinode/EIS observations. Compared to the preflare elemental abundances, we observed a strong increase in coronal abundance of Ca xiv 193.84 Å, an emission line with low first ionization potential (FIP < 10 eV), as quantified by the ratio Ca/Ar during the flare. This is in contrast to the unchanged abundance ratio observed using Si x 258.38 Å/S x 264.23 Å. We propose two different mechanisms to explain the different composition results. First, the small flare-induced heating could have ionized S, but not the noble gas Ar, so that the flare-driven Alfvén waves brought up Si, S, and Ca in tandem via the ponderomotive force which acts on ions. Second, the location of the flare in strong magnetic fields between two sunspots may suggest fractionation occurred in the low chromosphere, where the background gas is neutral H. In this region, high-FIP S could behave more like a low-FIP than a high-FIP element. The physical interpretations proposed generate new insights into the evolution of plasma abundances in the solar atmosphere during flaring, and suggests that current models must be updated to reflect dynamic rather than just static scenarios
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