In this study, a wireless data acquisition system was developed for wireless water flow monitoring (WWFM) in a closed channel pipeline system using android Smartphone. ATMEGA 328 single chip microcontroller (Arduino Uno Prototyping Platform) with a Bluetooth module, Near Field Communication - NFC tag, Smartphone with NFC reader, and G1-½ water flow sensor are applied in this design. The frequency input to the microcontroller was the pulse train which transferred from the G1-½ hall-effect water flow sensor. Then, the data from the microcontroller was transferred to an Android Smartphone using Bluetooth wireless serial communication. In addition, the NFC-tag is used as water flow sensor identification and location. Android Application was designed based on App Inventor for Android (AIA) which MIT platform. As the result, sensor ID based on NFC tag and flow rate of water using Android application on Smartphone was showed by the system. According to the experimental test, the flow monitoring ran well and displayed real-time of flow water in the closed channel pipeline system. The accuracy of wireless water flow measurement is 99.98%.

The present research focuses on developing mathematics comic as a teaching material that integrates the moral value of discipline and hard work for elementary school students. This character-building comic development method was made based on the ADDIE model, which includes analysis, design, development, implementation, and evaluation. Twenty-nine grade four students were recruited as samples, consisting of a small group of students in the limited trial group and a big group of students in the field trial group. The data collection technique used was a questionnaire. The development of mathematics comic teaching material containing discipline and hard work character-building has successfully resulted in a comic that met the feasibility standards. The field trial showed a significant increase of 0.76 and 0.74 in students’ character development in terms of discipline and hard work, respectively. The results indicate the effectiveness of mathematics comics in instilling Pancasila moral values in elementary mathematics teaching in Indonesia.

The objective of this research is to analyze the science process skills (SPS) of the summative test items in physics in Surakarta. This research used a descriptive method with content analysis, namely: summative test items in Academic Year 2015/2016 in Surakarta. Each item was analyzed based on science process skill indicators prepared and elaborated by the researchers. The result and discussion of the research showed that the SPS found in the summative test items in Physics in Surakarta included those of formulating hypotheses (2.88%), designing experiments (2.10%), interpreting data (5.10%), applying concepts (70.20%), communicating (6.64%), and drawing conclusions (13.08%) respectively.

In the globe, 40% of heat losses in domestic buildings were caused by single glazing windows usage and around 20% were due to air infiltration. Therefore, an improvement for the single glaze windows and reducing the air infiltration must be considered to lower the energy consumption. This study aims to investigate the thermal performance of secondary glazing sheet on the ordinary windows in the low-income dwellers. The PVC sheets were used as the secondary glazing which easy to tailor and fit into the windows frame in the living room. Besides, a commercial foam insulation tape was used to seal the air leakage of the windows. The indoor and outdoor temperatures of a living room, pre- and post-retrofitting, were measured and the U-values were compared based on ISO 9869:2014 standard. It is found that the respective temperature differences between indoor and outdoor at pre- and post-retrofitting were 5.6 °C and 8.6 °C. The post-retrofitting indoor temperature was more stable with fewer fluctuations compared to the pre-treatment. Furthermore, the U-values were improved by 57% where the number before and after retrofitting found to be 5.71±0.01 W/m2K and 3.23±0.01 W/m2K, respectively. Obviously, the utilisation of the proposed glazing and diminishing the air infiltration on a single glazing windows play the key role on improving the thermal comfort, cheaper than commercial double glazing, eco-friendly, and easy to install.

Electricity demand which increases up to 2.7%, needs to be evaluated to prevent power wastage. This paper proposes an INA219 sensor and a power monitoring solution based on the ESP8266. Power Monitoring stores and displays real-time data in Google Sheets via Blynk version 1.0.1. The system has been calibrated with a fixed LED and resistor as a voltage calibration load. Meanwhile, the lamp and shunt resistors calibrate the shunt voltage. The measuring tools for comparison in calibration are digital multimeters, oscilloscopes, and power data loggers. Calibration using the linear regression technique with accuracy, precision, and uncertainty analysis are determined by Mean Absolute Percent Error (MAPE), Relative Standard Deviation (RSD), and Gaussian distribution. Successively, the sensor coefficient of determination (R2), accuracy, precision, and uncertainty of the load voltage and shunt voltage are 0.999 and 0.997, 99.27% ​​and 93.71%, 99.82% and 99.55%, 0.37 V and 0.89 mV.