Implementasi Bluetooth HC–05 Untuk Memperbarui Informasi Pada Perangkat Running Text Berbasis Android

Running Text Display is an information board in order to convey any information by running text animation. This device is updated conventionally using a PC/notebook, so the updating process required by users only in one place. User will be difficult to update the information, if they do not stay in the place or PC devices are not available. Alternative media to update and determine new information for dynamic running text device use the data transfer capabilities between Android smart phone and microcontroller via HC-05 bluetooth module. The process of updating the data in the form of an array of characters successful transferred between Android applications and modules running text are 90 % reliability with the furthest distance and through a barrier of 10.5 m and 9.4 m, respectively

Can Student Assessment Sheets Replace Observation Sheets?

Observation is argued as the most suitable technique to assess the execution of authentic assessment. Unfortunately, it requires great amount of time and money. We need an alternative. Therefore, the purpose of this study was to develop an instrument in the form of a student assessment sheet on the implementation of authentic assessments in Mathematics subjects. This research is a development research that uses standard procedures for developing instruments. The result of the analysis with Aiken's formula showed that every item of the instrument was in a good category. The result of the analyses using Exploratory Factor Analysis (EFA), Confirmatory Factor Analysis (CFA), and Multitrait-Multimethod showed that the instrument had good construct validity. The result of reliability estimation using Cronbach Alpha (α) also showed that the instrument was in the reliable category. Thus, it can be concluded that the instrument in the form of student assessment sheets for assessing the implementation of authentic assessment in junior high school Mathematics learning is highly valid and reliable, which means that the developed instrument can replace the equivalent observation sheet