Multi Device Research Articles

Smart charging process development based on ant colony optimization machine learning for controlling lead-acid battery charging capacity

The Indonesian government has targeted 2.1 million two-wheeled electric vehicles and 2,200 four-wheeled electric vehicles (EV) by 2025. This is hampered by limited electricity supply and EV charging, which takes long time. Multi device interleaved DC-DC bidirectional converter has been applied and assessed as the most suitable method for battery EV and plug-in hybrid EV because it produces high power >10 kW. For power below 10 kW, it is recommended to use a sinusoidal, Z-Source, and boost amplifier type converter. The smart charging (SC) system will be applied to electric vehicles, which only require a minimum charging power of around 169 W for four lead acid batteries. This paper focuses on an SC system that is capable of charging the battery quickly while still paying attention to the state of health (SoH) of the battery. The SC developed uses a DC-DC boost converter to increase the voltage produced by the switch mode power supply (SMPS). Estimated charging time is less than 30 minutes and still pay attention to the battery SoH. SC will also use pulse width modulation (PWM) as a duty power cycle regulator. This research applies a multi-layer perceptron (MLP) classifier to a neural network (NN). The results of the research show that smart charging can charge up to 600 W with an estimated charging time of around 11 minutes. The charging condition is above 60 % and the power duty cycle setting is 100 %. The power estimation results processed using the ant colony optimization (ACO) based neural network method show a root mean square deviation value of 0.010013430 for charging four lead acid batteries. These results are useful to help solve the problem of capacity requirements and battery charging speed for EVs, with good SoH

Analysis and validation of multi‐device interleaved DC‐DC boost converter for electric vehicle applications

AbstractIn Electric Vehicle (EV) application, voltage conversion is significant to obtain the desired operating voltage from the source voltage. A conventional boost converter can handle such applications, but it may add losses throughout the conversion process. This work focuses on the design and implementation of a multi device Interleaved DC‐DC converter with greater voltage gain, lower voltage stress across the switch, and improved efficiency when compared to the standard Boost converter and conventional Interleaved Converter. The suggested converter has three times the voltage gain of a standard Boost DC‐DC converter. These converters are used in applications that demand a constant DC voltage, such as electric vehicles. The proposed converter's mathematical modelling and modes of operation are discussed. The proposed DC‐DC converter's feasibility is validated using real‐time simulation (OPAL‐RT), and the results are presented in detail.

Selection of frozen-thawed stallion semen by microfluidic technology.

The use of microfluidic technology is increasing in artificial reproduction technologies: With a small amount of semen, it allows for the selection of sperm with the best characteristics of kinetics, morphology and chromatin integrity. The ZyMot Multi (850 μl) is the most popular device of ZyMot Fertility Inc. To date, it was proven to be a valid instrument for sperm selection for in vitro fertilization and intracytoplasmic sperm injection in men. The aim of this study was to test the efficacy of the ZyMot Multi (850 μl) for stallion semen. Frozen-thawed semen from 15 stallions that were previously classified as being of 'good fertility' (GF; n=8; pregnancy rate ≥ 40%) and 'poor fertility' (PF; n=7; pregnancy rate < 20%), respectively, was used. Each ejaculate was assessed before and after microfluid recovery for kinetics (CASA), membrane integrity (MI) (SYBR14/PI), membrane functionality (MF) (HOS test), acrosome integrity (Spermac Stain Kit), morphology (Spermac stain kit), mitochondrial membrane potential (MMP) (JC-1) and chromatin integrity (aniline blue staining). Sperm concentration was reduced after sperm recovery in both groups, but more markedly in frozen-thawed semen of PF stallions (p < .05). Microfluid recovery increased total motility, MI, MF and MMP. While there was a significant increase in the percentage of progressively motile sperm after sperm microfluid recovery, there was a decrease in DAP, DSL, VAP, VSL, LIN, WOB and ALH (p < .05). A slight increase (p < .05) was detected in beat-cross frequency. The present results suggest that the ZyMot Multi (850 μl) device selects a specific sperm population from any stallion ejaculate with motile sperm and could therefore be a valid tool for in vitro testing with the aim to predict the fertility of frozen-thawed stallion semen.

Patterns of multi-device use with the smartphone. A video-ethnographic study of young adults’ multi-device use with smartphones in naturally occurring contexts

Using multiple devices at the same time is becoming increasingly common in the daily lives of users, be it for work or for leisure. This paper presents in situ qualitative and quantitative evidence of multi-device use from a dataset of over 200h of first-person and interview recordings (n = 41). We discuss three different ‘patterns’ of multi device use (work, leisure, mixed use) and illustrate the user experience in detail with three participant journeys. We find that the smartphone was always ‘in the mix’; we did not observe multi-device use without the smartphone, or isolated use of other devices. Overall, we suggest that looking at transitions between activities users engage in rather than devices they use is more effective to understand multi-device use. Based on this analysis, we highlight issues around the patterns and experiences of multi-device use in everyday life and provide recommendations for design and further research.

Study on research mode of smart safety outfits system for children

&lt;p&gt;According to the special characteristics of children’s body and mind and the concept of human–computer interaction, the research and development model of children’s intelligent safety clothing is explored and a A practical research model. Based on the multi–dimensional needs of consumers for children’s clothing and the performance of smart components, we explore the combination of smart wearable equipment and children’s safety clothing, and propose a design process architecture that takes into account function and aesthetics. Through the analysis of the connection technology between smart clothing and mobile terminals, we propose the idea from single interaction to multi–device co–connection, and establish a multi–interaction smart clothing based on the optimal allocation of energy and high. Through the analysis of the connection technology between smart clothing and mobile terminals, we propose the idea of moving from single interaction to multi–device co–connection, and establish the R&amp;amp;D process of multi–interaction smart wearable devices based on optimal energy allocation and efficient information transmission.&lt;/p&gt;

Secure Group Key Management Protocol for Grid Computing

In any multi–device / party systems supporting GRID and cloud-based applications, an essential constraint of these systems is the need of all tools and participants to interconnect with each other as members of a group in a secure approach. Group key management method is an essential functional element for any protected distributed communication setting. Key distribution method is a crucial factor in securing communication in grid computing. After the secure key management is executed, messages will be able to be securely exchanged between the grid units. A number of protocols have been proposed to maintain secure group key management. In this paper we present a new password base protocol for secure group key management in Grid computing environment, which is organized in two dynamic servicing layers: the grid application that needs grid services, and the grid services that act on behalf of the user.

Hysteresis Controlled Based Power Quality Improvement in a Renewable Energy Source Connected to Utility grid with BESS Based STATCOM

This Paper presents a control strategy of the grid interconnected inverter Renewable Energy Sources (RES). This system can achieve the maximum benefits from these grid interconnected inverter when installed in 3-phase 4-wire distribution system. Increasing electrification of daily life causes growing electricity consumption and the rising number of sensitive or critical loads demand for high quality electricity. One of the main problems facing today is that related with the transmission and distribution of electricity. Due to the rapid increase in global energy consumption and the diminishing of fossil fuels, the customer demand for new generation capacities and efficient energy production, delivery and utilization keeps rising. Utilizing distributed generation, renewable energy and energy storage can potentially solve problems as energy shortage. With the increase in load demand, the Renewable Energy Sources (RES) are increasingly connected in the distribution systems which utilizes power electronic Converters/Inverters. The inverter can perform as a multi function device by incorporating active power filter functionality. The inverter can thus be utilized as: 1) power converter to inject power generated from RES to the grid, and 2) shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current. All of these functions may be accomplished either individually or simultaneously. This new control concept is demonstrated with extensive MATLAB/Simulink simulation studies and validated through digital signal processor-based laboratory experimental results.

The More Choice, the Better? Evidence from Experimental Auctions in Rural Senegal

Economists generally believe that more choice is beneficial, yet bigger choice sets can impose opportunity, error and cognitive costs that lower demand. We study this relationship in the context of rural energy use in low-income settings. We invited approximately 1,100 randomly selected Senegalese households to participate in second-price auctions for improved cookstoves, and exogenously varied the number and types of devices being auctioned to identify the causal impact of expanded choice on willingness to pay (WTP). Expanded choice lowered WTP for a more advanced but relatively unfamiliar cookstove by 25 percent, but had no effect on WTP for a simpler, locally-produced device. Households’ ability to compare alternatives side-by-side during multi device auctions and identify the one best suited to their needs appears to drivethese results. Our findings have implications for the design of policies that aim to introduce welfare-improving technologies in remote, rural areas.

Contactless Stimulation of Multiple Piezoelectric Devices Using Electric Field

The contactless energy transmission scheme using parallel-plate capacitor like structure has been explored which provides a platform for energization of multiple piezoelectric (piezo) components. In the proposed method, ac electric field lines produced by copper electrodes penetrate to the piezo components that are coaxially aligned and positioned in-between at certain distance away from each electrode. Consequently, the components are strongly excited at a point where the functioning electric field source frequency alike with the mechanical resonant frequency of the piezo components. The maximum output power corresponding to optimum load and resonant frequency acquired from the contactless energized multi piezo devices is better than that of power obtained from contactless energized single piezo component by this parallel-plate capacitor electric field generator. The testing results reveal the practicability of non contact stimulation/excitation of multi piezo components simultaneously through electric field.

Advanced organ support (ADVOS) in the critically ill: first clinical experience in patients with multiple organ failure

BackgroundPrevalence of multiple organ failure (MOF) in critically ill patients is increasing and associated mortality remains high. Extracorporeal organ support is a cornerstone in the management of MOF. We report data of an advanced hemodialysis system based on albumin dialysis (ADVOS multi device) that can regulate acid–base balance in addition to the established properties of renal replacement therapy and albumin dialysis systems in critically ill patients with MOF.Methods34 critically ill patients with MOF received 102 ADVOS treatment sessions in the Department of Intensive Care Medicine of the University Medical Center Hamburg-Eppendorf. Markers of metabolic detoxification and acid–base regulation were collected and blood gas analyses were performed. A subgroup analyses were performed in patients with severe acidemia (pH < 7.2).ResultsMedian number of treatment sessions was 2 (range 1–9) per patient. Median duration of treatment was 17.5 (IQR 11–23) hours per session. Treatment with the ADVOS multi-albumin dialysis device caused a significant decrease in bilirubin levels, serum creatinine, BUN and ammonia levels. The relative elimination rate of bilirubin was concentration dependent. Furthermore, a significant improvement in blood pH, HCO3− and PaCO2, was achieved during ADVOS treatment including six patients that suffered from severe metabolic acidosis refractory to continuous renal replacement therapy. Delta pH, HCO3− and PaCO2 were significantly affected by the ADVOS blood flow rate and pH settings. This improvement in the clinical course during ADVOS treatments allowed a reduction in norepinephrine during ADVOS therapy. Treatments were well tolerated. Mortality rates were 50% and 62% for 28 and 90 days, respectively.ConclusionsIn this case series in patients with MOF, ADVOS was able to eliminate water-soluble and albumin-bound substances. Furthermore, the device corrected severe metabolic and respiratory acid–base disequilibrium. No major adverse events associated with the ADVOS treatments were observed.

Clinical forensic height measurements on injured people using a multi camera device for 3D documentation

Documenting the existence, size, position and shape of injuries is an important part of medical forensic examinations. In the photography of an injury, the documentation is limited to an approximation of size and position of the injury based on a ruler included in the image. The documentation of injuries can be improved with photogrammetry, which allows the creation of scaled 3D models of an injury that can be used to not only document and visualize the injury but also to match the injury with an injury-causing object. In this paper, the multicamera device “Botscan” was used to perform 3D whole-body documentation and measure the positions of injuries. A major advantage of 3D whole-body documentation compared to photography is that the former can be performed at a later stage of the investigation. This makes the whole-body 3D documentation of injuries an important tool for re-examination.

Compact Modeling of Capacitance Based 14 nm Triple Gate FinFET Using Verilog-A

Technology down scaling process divulges, the unveiled short channel effects (SCEs), which disrupts the behavior of bulk CMOS technology. In order to overcome these unveiled effects, the single gate controlling mechanism should be replaced with multiple gate mechanism to enhance the control of gate over the conducting channel. FinFET is a promising technology, which provides efficient gate controlling over the channel by multiple gates. Some of the multi gate FinFET devices are Double gate FinFET (DG-FinFET), Triple gate FinFET (TG-FinFET). In this paper, a charge based capacitance model has been proposed for modeling of TG-FinFET. The behavior and structure of the proposed device has been described in Verilog-A scripting language. IV characteristic of the proposed device has been observed, a three stage ring oscillator circuit is implemented with the proposed device to generate 1 GHz signal for testing purpose.

Comparative analysis of non-inverting buck-boost converter topologies for fuel cell low voltage applications

The FC sources are unregulated voltage sources and require power converter devices to get a regulated output voltage. When these devices are used in low voltage low power applications DC-DC buck-boost converters (BBC) are required to get the regulated voltage on load side. The multi device multi switch operation of the buck-boost converters are usually employed for successful operation of the FC stacks. In this paper, the different non-inverting type of buck-boost converters i.e., buck-boost converter (BBC), multi-device buck-boost converter (MDBBC), interleaved buck-boost converter (IBBC), and multi-device interleaved buck-boost converters (MDIBBC) are analysed and comparative study among them are presented with respect to the parameters like, ripple current, component size, power losses and efficiency. The comparative study demonstrates that the multi device converter topologies are more efficient than the other converter topologies employed in low voltage low power applications.

Comparative analysis of non-inverting buck-boost converter topologies for fuel cell low voltage applications

The FC sources are unregulated voltage sources and require power converter devices to get a regulated output voltage. When these devices are used in low voltage low power applications DC-DC buck-boost converters (BBC) are required to get the regulated voltage on load side. The multi device multi switch operation of the buck-boost converters are usually employed for successful operation of the FC stacks. In this paper, the different non-inverting type of buck-boost converters i.e., buck-boost converter (BBC), multi-device buck-boost converter (MDBBC), interleaved buck-boost converter (IBBC), and multi-device interleaved buck-boost converters (MDIBBC) are analysed and comparative study among them are presented with respect to the parameters like, ripple current, component size, power losses and efficiency. The comparative study demonstrates that the multi device converter topologies are more efficient than the other converter topologies employed in low voltage low power applications.

Tracking algorithm of weak disturbance signal under Multi-device interference in the internet of things

It was easy to generate weak disturbance signals under the condition of multi device interference and was necessary to track and control the signals. There were some errors in the traditional signal tracking methods. However, tracking accuracy was low. Therefore, a new tracking algorithm for weak disturbance signals with multi-device interference in the internet of things was proposed. This method was a new method which combined the full differential Thevenin equivalent parameter tracking method and the disturbance signal control method of the internet of things. Before tracking and controlling the weak disturbance signal, the complex wavelet detection method was used to detect the disturbance signal, and then the David superconducting magnetic method was used to track the weak disturbance signal. Experimental results showed that the proposed method can make the system run stably at the minimum cost. Besides, tracking accuracy of the proposed method was about 2.2%, while that of the traditional method was about 0.5%, which indicated that the proposed method can effectively track the weak disturbance signal of the internet of things under the interference of multiple devices, and made the internet of things in a stable operation state.

Energy Efficient Power and Channel Allocation in Underlay Device to Multi Device Communications

In this paper, we optimize the energy efficiency (bits/s/Hz/J) of device-to-multi-device (D2MD) wireless communications. While the device-to-device scenario has been extensively studied to improve the spectral efficiency in cellular networks, the use of multicast communications opens the possibility of reusing the spectrum resources also inside the groups. The optimization problem is formulated as a mixed integer non-linear joint optimization for the power control and allocation of resource blocks (RBs) to each group. Our model explicitly considers resource sharing by letting co-channel transmission over a RB (up to a maximum of r transmitters) and/or transmission through s different channels in each group. We use an iterative decomposition approach, using first matching theory to find a stable even if sub-optimal channel allocation, to then optimize the transmission power vectors in each group via fractional programming. Additionally, within this framework, both the network energy efficiency and the max-min individual energy efficiency are investigated. We characterize numerically the energy-efficient capacity region, and our results show that the normalized energy efficiency is nearly optimal (above 90 percent of the network capacity) for a wide range of minimum-rate constraints. This performance is better than that of other matching-based techniques previously proposed.

ICT-Based Business Communication with Customers in the 4th Industrial Revolution Era

Objectives: As information and communications technologies (ICTs) such as augmented reality, virtual reality, IoT, and artificial intelligence are developed rapidly, the general public is becoming familiar with ICT technologies. Companies should innovate their communication methods to the public who are familiar with these ICT technologies. We need to actively incorporate ICT technologies to create creative ways of communicating our companies to our customers. Methods: The latest ICT technologies (augmented reality, artificial intelligence, IoT, self-driving car, etc.) are used to review the methods with cases in which they communicate with customers and present effective ICT technology-based solutions. Results: If new media services such as augmented reality, various quiz shows, and interactive TV are utilized, customers can be brought to stores, shopping malls, and various contents through indirect and unique experiences. In the future, if self-driving cars are commercialized in earnest, hundreds of millions of drivers will have a leisurely time inside self-driving cars. Several content companies have come up with ways to communicate with customers through screens and virtual reality inside self-driving cars. Conclusions: The development of ICT technology provides companies with new opportunities for communication. Communication methods with customers using ICT technology are always changing. Already, communication methods that use drones and ASMD (Adoptive Source Multi Device) have become out of fashion even before they become popular. ICT changes quickly; it must actively replicate the methods used in other industries and quickly utilize them.

Oral cleanness and periodontal health status among coffee-shop workers in Najaf city / Iraq

Background: Water-pipe can be defined as a single or multi stemmed device that used to vaporize and smoke flavored tobacco whose smoke is passed via water vase before inhalation. Water-pipe smokers are at risk of exposure to many toxic chemicals that are not filtered by water, as well as risk of infectious diseases when the mouth piece of the water-pipe is shared. This study was carried out to investigate the effect of water pipe on the oral health. Materials and Methods: Sixty persons were included in this study aged between 22 and 23 years. Forty persons were coffee shop workers for at least five years, half of them were water-pipe smokers (active smokers) and the other weren’t smokers (passive smoker), the last group was the control group which includes twenty non-smoker students matching the study group in the age, gender and geographical location. They had been diagnosed for plaque index of Silness and Leo in1964, calculus index according to calculus component of the Periodontal Disease Index, (PDI) of Ramfjord 1959 and gingival index of Löe and Sillness 1963 as well as loss of attachment according to criteria of WHO in1997. The values of the present study were subjected to statistical analysis by Statistical Package for Social Sciences version 20 to specify the statistical differences between the three groups. The Kruskal-wallis test was used to determine the statistical significance of difference between the three groups. Mann-Whitney test was used to assess the statistical significance of difference between each 2 groups. Results: The mean rank values of dental plaque were recorded to be the highest among the coffee shop workers who were active water-pipe smokers group followed by the workers who were passive water-pipe smokers then control with statistically highly significant difference. Similar results were obtained concerning gingival and calculus indices with statistically highly significant difference. There is no significant difference concerning the attachment loss attachment loss among water-pipe smokers and the control group. Conclusions: this study concluded that water-pipe smoking is negatively associated with the oral cleanness and gingival health.

A high efficiency non-inverting multi device buck-boost DC-DC converter with reduced ripple current and wide bandwidth for fuel cell low voltage applications

The voltage produced by the fuel cell (FC) device is unregulated and varies from 0.4 V to 0.8 V on full load to no-load respectively. When these devices are used in low voltage applications and output voltage lies between higher and lower values of input voltage range, it is required to connect a DCDC buck-boost converter to get a fixed output voltage. In this paper, a new noninverting multi device buck boost converter (MDBBC) is proposed, in which the multi device buck and boost converters are connected in cascade and operate individually either in buck or boost operating modes. The paper also includes the steady state analysis of MDDBC based on the state space averaging technique. A prototype model of proposed converter compatible with FCS-1000 Horizon FC model with rating of 270 W, 36 V is designed and developed. The proposed converter is experimentally validated with the results obtained from the prototype model, and results show the superiority of the converter with higher efficiency and lesser ripple current observed under steady state operation of the converter.

(1091) - Yes We Can. A Multidisciplinary, Trans Center and Multi Device Journey of Pediatric Patient on the Road to Heart Transplantation

(1091) - Yes We Can. A Multidisciplinary, Trans Center and Multi Device Journey of Pediatric Patient on the Road to Heart Transplantation