International Journal of Research and Engineering
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Design and Manufacturing of Pole Climbing Unmanned Fire Extinguisher
Get PDFMay it be the destruction of Jerusalem temple in 587BC or the infamous disaster in a mall in Philippines in December 2017, fire was the major culprit. Fire is one of the most severe and frequent disasters faced by the mankind especially in the machine age. Our project focuses on extinguishing such city fires with the help of a specially designed robot. The proposed robot would climb up a pole which can easily be constructed with minimal expenditures and efforts during or after the construction of the building. The robot being able to climb pole, would be able to traverse upwards, no matter at what height the fire is set. This versatility would eliminate the problems posed due to insufficiently long ladders (100 feet maximum) with the firefighting department. The robot is also equipped with a motor controlled nuzzling arrangement which will allow spraying the water jet in all possible directions. Such use of technology also safeguards the lives of firefighters which in conventional methods are put in danger. The robot will be equipped with a camera at the top which would enable the controller to judge the intensity and severity of the fire. The robot can be wirelessly controlled using radio controlled device which can control the locomotion of robot, direction control of water jet and an LCD which can display the camera sight
Time-aware Traffic Shaper using Time-based Packet Scheduling on Intel I210
Get PDFBy 2015, the Institute of Electrical and Electronics Engineers (IEEE) time-sensitive networking (TSN) task group has released several TSN standards. Amongst them is 802.1Qbv, also known as a time-aware shaper, aiming to provide performance assurances of latency and delivery variation to enable applications in a TSN network. While there are several products and evaluation kits that employ 802.1Qbv in the market now, it is still not widely adopted yet due to the maturity of the standard. Hardware-enabled 802.1Qbv use hardware queues and timers to achieve accurate transmission of packets in the switch and bridge. This research aims to investigate the feasibility of using an existing end-station Ethernet controller, Intel I210, and its launch time control feature (commonly known as time-based packet scheduling) to shape traffic compatible to 802.1Qbv-enabled network bridges. A software solution is developed by implementing a software configurable gate-control list and employing open-source Linux RFC patches for per-packet transmit time specification. By configuring the kernel and mapping kernel-layer traffic classes to the hardware queues, packets can be transmitted out at precise times while attaching 802.1Q VLAN tags, required by bridges to identify packets. Through analysis, it is found that this solution will require an additional 30 μs transmit offset to be used effectively. That is 55% more time is needed to transmit a packet in a back-to-back connection and 17.6% on a 3-switch network to improve period peak jitter performance to just 8.9 μs compared to 1 ms on solutions that send packets out periodically using software sleep functions
Development of a Single-Axis Sun Seeker using Three Sensors
Get PDFThe output power generated by the solar photovoltaic panel is directly proportional to the amount of solar energy it receives. Therefore, for maximum efficiency, a solar photovoltaic panel must be perpendicular to the sun. As a result of this, a tracking device is required to ensure that solar panels are always directly perpendicular to the direct component of the sun. Such a tracking device is referred to as a sun seeker. This research work describes the development of a single-axis sun seeker using three sensors. Light-dependent resistors are used as sensors. The light intensity received by two of the sensors is compared by two comparators and an appropriate signal is sent to the driving mechanism which moves the solar panel tray until the right and left sensors receive an equal amount of light intensity. The middle sensor was designed to activate the speed control unit of the system when it senses the required light intensity. The whole system runs on a 12V rechargeable battery. A battery charger circuit with automatic cut-off was incorporated to the design to keep the battery topped-up and to prevent overcharging
FPGA Based Implementation of Cascaded Multi-level Inverter with Adjustable DC
Get PDFIn this paper, total harmonic distortion (THD) minimization problem for cascaded H-Bridge multilevel inverters (CHB-MLIs) with unequal DC sources is studied, which the DC voltage levels of CHB-MLI is considered to be dependent on switching angles. Two forms of variations are proposed for DC voltage, considering corresponding switching angles. A simplified THD formulation, independent from the DC voltage is presented. Both Homotopy method and Genetic Algorithm is applied for THD minimization using Selective Harmonic Elimination PWM (SHEPWM). The results show less THD results using GA. The simulation results are demonstrated by experiments on a seven-level inverter controlled by Xilinx SPARTAN3 FPGA (XC3S400-PQG208). The results show that switching angles for minimum THD can be considered constant for desired fundamental voltages
Optimal sizing and techno-economic of a stand-alone photovoltaic system in Baghdad using improved system models and measured weather data
Get PDFThe use of stand-alone photovoltaic (PV) systems is restricted mainly due to their high initial costs. This problem is alleviated by optimal sizing as it results in reliable and cost-effective systems. Using PV systems in Iraq can help resolve the power generation deficiency. This country enjoys an ample amount of solar radiation all throughout the year making it suitable for PV applications. Previous PV system sizing and feasibility studies, which have been conducted for Iraq, is rather inaccurate as they either incorporated simple equations or synthetized weather data along with simple mathematical models. In this paper, more rigorous system models, as well as measured meteorological data, were used to achieve more accurate sizing results, thus allowing a more realistic techno-economic feasibility analysis to be done. The optimal system, for an average load of 10 (KWh/day), consisted of 38 PV panels of 120 (Wp) each, a 16 110 (Ah) battery bank, one 1000 (W) inverter and four 100 (A) charge controllers in parallel. The unit cost of the generated electricity was estimated to be 0.1729 (/KWh)
Comparison of Different Distance Measure Methods in Text Document Clustering
Get PDFClustering text document is an unsupervised learning method to find common groups. The clustering of text documents are the special issue in text mining for unlabeled train documents. Fortunately, there are many proposed features and methods to resolve this problem. The framework of text document classification consists of: input text document, preprocessing, feature extraction and clustering. The common classification methods are: self-organization map, k-means and mixture of Gaussians. The correlation of resulted clusters is based on selecting a distance measure method. The main focus of this paper is to present different exiting distance measure methods along with k-means clustering for text document clustering. The experiment performed k-means clustering on the Newsgroups dataset and measure clustering entropy to evaluate the different distance measure methods
The impact of Risk Management on Bank Sector Analytical study on Cihan Bank
Get PDFThis study reviews theories and models on operational and strategic risk management, as well as the main frameworks and regulations on risk management. The study focused on Cihan banks and the results were conclusive that risk management impact on Cihan bank and the factors affecting on banks is a committee, board, Chief executive officer (CEO). We distributing 70 questioners and obtain 50 only. The results and findings of this research are analyzed by SPSS package version 21 to build analysis and draw a conclusion. The research findings showed a distinctive relation between measuring dimensions and risk management
Application of Optimized SFCL and STATCOM for the Transient Stability and LVRT Capability Enhancement of Wind Farms
Get PDFIn this paper, the combined superconducting fault current limiter (SFCL) and STATCOM are used to improve transient stability and low-voltage ride-through (LVRT) capability of the wind turbine generation system (WTGS). The SFCL absorbs the accelerating energy of the generator, and therefore, improves the WTGS transient stability. Also, STATCOM helps the restore connecting point voltage to improve LVRT capability by reactive power compensation (RPC) after fault clearing. The optimization problem of SFCL resistance and STATCOM capacity is formulated based on the transient stability and LVRT capability of WTGS. The Simulation study shows the superior improving LVRT capability of combined SFCL and STATCOM over individual SFCL or STATCOM. Also, the required capacity of STATCOM for RPC is significantly reduced. PSCAD/EMTDC software (V4.2) is used for simulation
Optimal Sizing and Location of Shunt Capacitors in Medium Voltage Underground Power Cables: A Case of Minimum Cost
Get PDFThis paper introduces a method to determine optimal sizing and location of shunt capacitors in medium voltage Underground Power Cables or in distribution system. To execute this method, two models of standard branch and the Newton-Raphson method are also mentioned to analyze and determine values of bus voltage and currents going through lines in whole system. The EN 50160 standard is introduced to evaluate all operational parameters and propose solutions to reduce risks. In additionally, the cost function method is introduced basing on cost of purchasing compensative device, power loss in own compensators and whole system after compensating. By considering partial derivative of cost function with respect to variables, optimal sizing and location of shunt capacitors can be determined for all buses in the system. Analyzing the system by using the Newton-Raphson method in stable mode, all operational parameters are evaluated to see the benefit of placing capacitors in some criterions: reduce the current going through all lines and increase value of bus voltage in whole system. Theory research are verified by simulation results carried out in Matlab 2016 software
Application of Big Data in Decision Making for Emergency Healthcare Management
Get PDFApplication of big data in healthcare has enhanced efficiency and decision making. This is of critical benefit to patients, healthcare professionals and the healthcare institution. Although various research studies have examined the application of big data analytics in healthcare, few studies have explored its application in emergency medicine. This research study explored the application of big data in emergency medicine in facilitating decision making among paramedics and other healthcare practitioners. Appropriate research studies were identified and reviewed systematically to explore the theme of the study. The study found that big data promoted decision making in emergency medicine through the predictor models, which enabled the healthcare practitioners make informed judgments concerning patient care