This study aims to develop a product such as "Digital storytelling of Physics (DiS-Phy)" that can be used as a physics' educational media for distance learning (PJJ) on magnetic field material. DiS-Phy d...
This study aims to develop a product such as "Digital storytelling of Physics (DiS-Phy)" that can be used as a physics' educational media for distance learning (PJJ) on magnetic field material. DiS-Phy developed as a digital storytelling media which is able to combine several learning media such as writing, pictures and learning videos in one medium. The developed DiS-Phy also equipped with scientific literacy questions. DiS-Phy can be accessed on all types of distance learning devices such as smartphones, laptops and tablets that are connected to the internet. DiS-Phy including the type of research and development (Research & Development) which refers to the ASSURE model. The result of validation test shows the percentages of 91,07%, according to subject-matter expert, 93,16%, according to media expert and 87,50% according to learning expert. DiS-Phy also tested by 4 physics teachers at senior high school in Jakarta that achieved 92,57% points that make this product has been qualified as a worthy physics' distance learning device. Also of 35 as respondents in this study shows the percentages of 87,48% points that make this product worthy to use as an educational media. Based on the results, it can be concluded that the DiS-Phy has been qualified as a worthy physics' distance learning device for teachers and students.
This research is a preliminary study on the use of sago midrib as an acoustic material. This study aims to determine the sago as acoustic material by measuring the absorption coefficient using (impedance tube method) ...
This research is a preliminary study on the use of sago midrib as an acoustic material. This study aims to determine the sago as acoustic material by measuring the absorption coefficient using (impedance tube method) of 100 Hz-1.6 KHz frequencies. The results of measurement were analyzed and compared with common acoustic material available on market as reference. From the measurement of the sago midrib composite, absorption coefficient has fluctuated from low to high frequencies as the absorption coefficient of reference material is found to be more stable.
Interactions between road users, motor vehicles, and environment affect to driver’s travel behavior;however, frailer of proper interaction may lead to ever-increasing road crashes, injuries and fatalities. The curren...
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The high level of erosion that occur in Musi river basin has improved a tremendous impact on sedimentation in downstream areas and has resulted in many infrastructure of water is disturbed, such as silting of irrigati...
The high level of erosion that occur in Musi river basin has improved a tremendous impact on sedimentation in downstream areas and has resulted in many infrastructure of water is disturbed, such as silting of irrigation channels, siltation of rivers which disrupt the flow of transport stream and increasing the risk of flooding, high sedimentation in the port basin, low quality of water and the rising costs of water treatment. This study utilizes techniques terrain models Digital (Digital Elevation Model/DEM) to analysis the spatial distribution of the potential for erosion and sources of sedimentation, as well as the direction of the flow of sediment into channels as well as its relationship with outlet in branching river as the supplies to be sediment to the river flow. The method used in this study using a spatial model analysis with the help of GIS in analysing and presenting the level of erosion and deposition by utilizing modelling slope and kinetic energy of rainfall to estimate the index erosivity and distribution pattern of sediment into the river channel. This research was conducted at the upper Lematang river sub basin with area 412,638 Ha, which are classified into 11 sub-chatments with the highest altitude is 3.159 m above sea level (Dempo Valley) and the lowest is 126 m above sea level (Talang tinggi Valley). Analytical results have been tested by taking a fine sediment sampling in each sub-watershed in the analysis and is taken along the channel network and compare the observed patterns with the results predicted by the model analysis of soil erosion. Overall, erosion by high intensity tends to occur in the relationship between the different vegetation coverage, the barren land and open land used for farms and land used for mining. Approximately 45-65.5% slope bad condition because the vegetation has been open, so it can be seen the amount of erosion in the area is 2.139 ton/ha/year, at the sloping is 1.8239 ton / ha / year
The development of the economic sector is determined by services to the public through reforms that aim to place public satisfaction through the management of road infrastructure assets. Some research on road infrastr...
The development of the economic sector is determined by services to the public through reforms that aim to place public satisfaction through the management of road infrastructure assets. Some research on road infrastructure assets still requires a deepening of studies related to the delivery of public services related to asset management systems. The purpose of this study is to find an appropriate road infrastructure asset management strategy through an integrated asset management system and asset management policies that can provide public satisfaction. This comprehensive approach to management strategies ensures that the performance of service provider assets is in line with the expectations of stakeholders including road users. This descriptive qualitative research is based on the perspective of road users as respondents, consisting of vehicle drivers from 50 transportation companies (people or goods) through interviews and observations. The results show aspects of asset performance based on the user's perspective there are five aspects, namely productivity, efficiency, effectiveness, use of resources and institutions and this performance is integrated in the asset management system related to policies from the management authority through service delivery namely quality and mobility, risk and use and maintenance of resources. The conclusion of this research is that road infrastructure asset services can be improved through the concept of road infrastructure asset management strategies in an integrated management system with five aspects of performance and more directed towards asset management policies related to the provision of road infrastructure asset services.
This article presents the use of an interactive computer tool developed in MATLAB® called RISK-ASSESSMENT v1.0, to perform market risk analysis of commercial products, through the development of cash flow, sensit...
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This study aimed at designing and implementing a multichannel EMG based on Infinite Impulse Response (IIR) filter and then compare its performance with the standard EMG devices. Hence, the design of this multichannel ...
This study aimed at designing and implementing a multichannel EMG based on Infinite Impulse Response (IIR) filter and then compare its performance with the standard EMG devices. Hence, the design of this multichannel EMG system consists of two parts: hardware and software. The hardware comprises instrumentation amplifier and NI DAQ USB 6009 as data acquisition device, while the software is composed of myoelectric signal processing (e.g. filtering, rectifying, and smoothing) and interface signal on personal computer (PC) using LabVIEW programming. To test the device, two procedures were performed, there were instrumentation test and performance test of the EMG device. The instrumentation test resulted in the gain value of instrumentation amplifier at 12.794 times with linearity of 0.9998. Moreover, the response of implemented Butterworth IIR filter is compatible with the design at the cut off frequency of 30-400 Hz and 50 Hz. For the performance test, quantitative and qualitative data recorded from normal male subjects aged of 20-40 were compared. The result showed that EMG prototype work as well as EMG comparison with relative error percentage for each value parameter of maximum, minimum, and average amplitude signals at 14.05885 %, 14.82683 %, and 14.0411 % respectively. Furthermore, the features of recorded signal for similar simultaneous movements using EMG prototype also share identical features with the recorded signal using standard EMG.
Premature babies have difficulty for regulating their body temperature because weight deficiency. Infant incubator that equipped by temperature control system can support thermoregulation process in baby body. This pa...
Premature babies have difficulty for regulating their body temperature because weight deficiency. Infant incubator that equipped by temperature control system can support thermoregulation process in baby body. This paper explained design of temperature control system using Proportional-Integral-Derivative (PID) controller and its implementation to the laboratory scale infant incubator. The transfer function of infant incubator was obtained by step test method using First-Order and Dead Time (FOPDT) model where process gain K = 0.29, settling time Ts = 18s and dead time Td = 1. Ziegler-Nichols (ZN) and Direct Synthesis (DS) PID coefficients tuning method was used is this experiment and it resulted for ZN tunning method, proportional gain Kc = 20.14, integration time Ti = 0.2 and derivative time Td = 0.05 and DS tunning method proportional gain Kc = 5, integration time Ti = 18. PID controller was implemented to the Personal Computer (PC) with LabVIEW 2013 programing language, LabJack U3 HV data acquisition device and LM-35 temperature sensor. Set point of temperature that required was 350C with t and 250C initial temperature. The controller performance that resulted by this experiment were for ZN tunning method 38 minutes for settling time while DS tunning method resulted 12 minutes for setling time.
Indonesia's economic growth is growing along with the growth of the construction industry against increasing construction projects. The performance of a construction project requires serious management to achieve ...
Indonesia's economic growth is growing along with the growth of the construction industry against increasing construction projects. The performance of a construction project requires serious management to achieve maximum results. Delays occur, quality is not in accordance with contract specifications, and costs that sometimes occur overbudget. Some studies show that the dominant factors causing overbudget in construction projects consist of: cost estimation factors, performance management factors, resource mobilization factors, control factors of timing performance, incomplete project information data, increasing material prices, and financial policies from government. In overcoming these dominant factors, project cost management is needed. Construction projects can be managed with project cost management. Project cost management includes the stages of planning, scheduling and controlling which are important steps to be taken to achieve the objective of project performance. Project cost management involves cost budgeting and cost control. Cost budgeting aims to generate a cost baseline to ensure project performance and project needs. A cost baseline is a time step from the budget used by the project manager to ensure and monitor costs. Cost control is used to monitor costs based on the cost baseline. Project control systems can be seen through project performance. Project performance can be done by comparing cost performance over time. Costs from the time period can be analyzed by variance analysis. Variance analysis involves actual project performance with planned performance. Value technique is used to analyze trend whether a performance is improving or deteriorating by comparing planned performance with actual performance. EVA (earned value analysis) is one of method using for project control. EVA method can be used to measure project performance which applied as a tool to integrate between cost and time aspect.
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