Association for Scientic Computing Electronics and Engineering (ASCEE): Open Journal Systems
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Temporal analysis of total suspended solids (TSS) at Ujung Pangkah Beach, Gresik, from 2016 - 2020 using aqua MODIS image data
Get PDFTotal suspended solids (TSS) is a parameter widely used to detect pollution on the coast, especially in areas that have a sloping coastal structure where currents and waves parallel to the coast will accumulate these solids to form sedimentation gradually. This study aims to map the distribution of TSS on the coast of Ujung Pangkah Gresik where at the end of this coast there is a flow from the Bengawan Solo river. The method in this study implements remote sensing technology to collect Aqua MODIS satellite image data of from 2016 to 2020. Based on calculation results, the wavelength band 1 (660 nanometers) of the Aqua MODIS image is the best wavelength by looking at the R correlation value generated of 0.573, so it can be concluded that the Aqua MODIS satellite imagery with a resolution of 250 - 500 meters can still be used to create a mathematical model for mapping the TSS distribution on the coast. In terms of forecasting for 5 years, the reflectance value generated from the image does not give significant results, because this satellite image is very influenced by the weather, so it is very difficult to get a cloud-free image in the same month every year to extract the reflectance value
Chatbot helpdesk design for digital customer service
Get PDFA chatbot is a computer program based on AI (Artificial Intelligence), namely virtual robots that simulate conversations like humans. Customer service (CS) is one of the many parts of a company that will directly contact customers. Therefore CS is expected to be able to provide fast and appropriate responses to customer complaints and needs. Using AI technology, Chatbot can help or replace customer service duties because it can provide information and help customers' constraints precisely and quickly. A chatbot is currently widely used by middle and upper companies. H3I is a kind of Chatbot that serving all loyal customers and can be implemented in various messenger platforms such as WhatsApp, Line, and others. For gathering the information, the authors use interview, observation, literature study. Moreover, the Prototype model is used for the development of Chatbot. The result was made a Chatbot for WhatsApp that can be used for customer service
Regional network (centrality) and Covid-19 spread in West Kalimantan
Get PDFAt the end of 2019, the disease was identified in the Wuhan region China as coronavirus 2019 or Coronavirus Disease (Covid-19). This disease quickly spread to other nations, including Indonesia and West Kalimantan. The alert for the Covid-19 outbreak in West Kalimantan began with the release of the Covid-19 emergency response circular letter by the Governor of Kalbar. The spread of infectious diseases can occur because of the “connectivity†between areas. This paper is intended to describe the interaction between cities/ regencies in West Kalimantan and the relation to the spread of the Covid-19 pandemic. This paper used centrality measurement (network analysis) as a primary method. Afterward, it will then be superimposed with the Covid-19 spread data, which results in several trends in the position of each regency. From findings, cities/ regencies with high centrality scores tend to have a high number of confirmed cases (positive) of Covid-19
Inertia Reduction using Interaction Control Approach for Mecanum Wheeled Vehicle on Cornering Road
Get PDFThe paper presents a dynamic control approach using impedance control to reduce inertia factors acting on a Mecanum Wheeled Vehicle (MWV) on cornering roads. Inertia in a mobile vehicle is one of the issues that affect the safety and energy efficiencies of the vehicle, especially when maneuvering on cornering and confined paths. With reference to the problem statements in the dynamics analyses, velocity-based impedance control was proposed where the derived interaction translational forces on the vehicle that consider friction and touching forces on vehicle-terrain are controlled through the velocities of the vehicle. This study emphasized shaping the axial velocities input of the MWV for both longitudinal and latitude motions to control the sensitivity of the vehicle during cornering periods. The verification was done through several simulations on the proposed velocity-based impedance control on the MWV plant. The results show that the different forces on MWV axial motion were capable of reducing inertia via velocity input during the cornering period of maneuvering by increasing the stiffness and damping ratio of the controller at about 2 and 9 for stiffness x-axis and y-axis, respectively, and 15 and 10 for damping ration of the x-axis and y-axis respectively. Moreover, with the proposed controller, inertia on MWV can be controlled on the slippery road such as asphalt roads. This scenario has influenced the overall kinetic energy of the vehicle down to about 26%, thus, able to control the overdriven occurred on cornering road
Pedagogical challenges and design of virtual theatre performance: an exploratory case study
Get PDFCovid-19 impacts universities around the world, changing online teaching and learning activities. These changes occur rapidly, causing teachers to look for creative online learning methods, especially learning theatre performances. Virtual theatre learning looks difficult and gives a challenge for teachers during the Covid-19 pandemic. Hence, it is necessary to change the performance mode of production and virtual theatre teaching with the audience's presence through the gadget screens in their homes. This research evaluates and answers the challenges of acting pedagogy that has existed so far and designs a virtual theatre performance format that is certainly different from conventional performances. This research uses the exploratory case study research design. This design was used as a procedure to identify, analyse, and design pedagogical challenges and design a virtual theatre for University of Muhammadiyah Semarang students by giving them a questionnaire. The result shows that collaboration between art and technology is an effective formula for virtual theatre performances. The zoom application and its accompanying features were chosen to be a virtual stage for staging a work. The transition of theatre performances from the traditional to the digital era also impacts the creative team's duties and work responsibilities. It can be observed in the directors, costume stylists, music stylists, lighting stylists, video stylists, stage directors, and production directors. Virtual theatre performances challenge the creativity of actors and creative teams to produce works of art with the help of digital technology. By analyzing the challenge and designing virtual theatre performances, this research can benefit the art community in the futur
Design and Simulation of Synchronous Buck Converter in Comparison with Regular Buck Converter
Get PDFIn a variety of low-power applications, a step-down dc-dc converter is used to reduce the voltage from a higher level. The two types of dc-dc converters are a regular buck and synchronous buck. The synchronous buck utilizes two switches and one diode, whereas the regular buck uses one switch and one diode. Many converters rely on the power components' switching qualities to work. A second MOSFET is required due to the diode's higher conduction losses. Because of the diode's conduction losses, the converter's efficiency may be reduced. The use of a synchronous buck converter improves efficiency by reducing diode losses. The main goal of this study is to compare and contrast these two low-power step-down converters. The simulation in this work was performed using the LTSPICE program
Development of a Nonlinear Harvesting Mechanism from Wide Band Vibrations
Get PDFThe main objective of this study is to present an energy harvesting approach to scavenge electrical energy from mechanically vibrated piezoelectric materials.A mechanical energy harvester device has been developed and tested. The fundamental benefit of this mechanical device is that it can function effectively in a wide range of ambient vibration frequencies, whereas traditional harvesters are limited. A suitable conditioning circuit for energy scavenging has been proposed which can achieve optimal power stream. For controlling the power flow into the battery a circuit has been designed consisting of an AC to DC rectifier, an output capacitor, a switch mode DC to DC converter, and an electromechanical battery. An adaptive control system has been described for switching any electronics devices and maximizing battery storage capacity. Experimental results reveal that the power transfer rate can be enhanced by approximately 400% by utilizing the adaptive DC to DC converter. Various investigations on the piezoelectric harvester have revealed that the energy generated by the mechanical device can exceed the 1.4-volt barrier, which is suitable for charging capacitors in electronics devices. The findings of this study will be crucial in mitigating society's energy crisis
Performance Estimation and Control Analysis of AC-DC/DC-DC Hybrid Multi-Port Intelligent Controllers Based Power Flow Optimizing Using STEM Strategy and RPFC Technique
Get PDFThe control system will measure the renewable energy generation power, and if the generated power is equal to the grid power, the generation sources are directly connected to the load system. When the power generation is not at sustaining level, the controller will optimize the source using the DC-DC converter and Battery based Energy management system. The operation of the battery system depends upon the power generation availability of renewable energy resources. During the high power RES, the battery is charging condition. When the RES is low power means the battery is in discharged condition. Also, the fuel cell-based energy compensation will take place when the battery power is low. The Energy router will monitor all the above generation plants based on the threshold values of each power plant, substantial Transformative Energy Management (STEM) Strategy and Resilient Power Flow Control (RPFC) controller takes necessary action like which power plant is connected to the grid power system. The simulation is performed on Mat lab / Simulink simulation platforms, and the results show the effectiveness and reliability of the control strategy for micro-grid interconnection and flexible energy flow correspondence
The determination of green open space (GOS) in Palu based on total population and area
Get PDFGreen Open Space (GOS) is the most important factor of a city formation structure. Green open space is very much needed around the downtown area due to its function that supports the ecology of a city. The quality of environment are becoming healthier hence the function of green open space as a recreation area in the downtown. Green Open Space can also function as a spot where people are able to socially interact with each other, function in culture aspect and even function as an area to support the economy of the community around the existence of the green open space. Urban area of Palu city has high temperature because it passed by the equator, sometimes it reaches 36 ℃, even if it is raining during the night but still it is very hot in the daylight. Determination of how green open space starts is from population density and area, it can be seen through several sub-districts because the population of each sub-district is different in terms of number and area. Therefore, it should be regulated from several existing districts. Palu City consists of 8 districts with varying population densities. Method used was quantitative analysis through calculating the need for green open space based on thepopulation in each district. The data were analyzed through the formula and the coefficient per capita. Then it is described in maps of sub-districts in the city of Palu. The results of this research will provide how many public open space is spread in the city of Palu as the capital of Central Sulawesi Province. This can be applied to the map of Palu City. The results of the research will show how many public open spaces are in each sub-district
Learning loss during the pandemic: Views of Indonesian teachers and parents
Get PDFThe pandemic situation has dramatically caused a shift from face-to-face learning to online-based distance learning. Learning loss has become an unanticipated impact and threatens almost all students in the world, including Indonesia. This qualitative study was aimed to explore the understanding of teachers and parents in Indonesia about learning loss. A total of 16 participants consisting of teachers and parents (M.age = 44.5; Female = 81.25%; Male = 18.75%) were involved in focus group discussions as the data collection process. This is narative research using thematic analysis from Braun Clarke (2006) was used in data analysis. There were 6 final themes about learning loss, namely: the determinants, the forms, the negative impacts, the strategies to minimize, the parties who are responsible for overcoming it, and the expectations of teachers and parents. The unique findings of this study establishing the possibilities for future research include decreased motivation and positive characters as a new form of learning loss, teacher capacity in conducting online learning, technological literacy for parents, and learning loss for students with special needs as well as network constraints and unnecessary involvement from parents (finishing student assignments) as parts of the causes of learning loss. It is necessary to have a strategy in overcoming learning loss in a collaborative effort from various parties responsible for the education system in Indonesia