Red onion plants using hydroponic method is a method performed by cultivating plants using water, nutrients, and oxygen with no soil required. Hydroponics method is an alternative solution to grow onions in limited soil. The changes in air temperature, bright light, plant temperature and humidity greatly affect hydroponic growth. Red onion plants using hydroponic planting medium is a method performed by cultivating plants using water, nutrients, and oxygen with no soil required. Hydroponics method is an alternative solution to grow onions in the limited land. The changes in air temperature, bright light, plant temperature and humidity greatly affect hydroponic growth. The difficulty of knowing the environmental conditions of hydroponic planting media, often makes the hydroponic farmers fail in the middle of the process of plant growth. This monitoring system uses water temperature sensor, air temperature sensor, Light Sensor, GSM SIM800L, LM2596Relay module and Arduino Uno as a microcontroller. The result of tests conducted for eight weeks on the onion environment monitoring by taking into account the water temperature, humidity, air temperature, and light intensity. The leaves amount and height acquired from the test is 12 leaves with 29 cm of height.
Virtual Reality (VR) can be used as an assistive system to learn with immersive visualization and interactive control. Anatomy is a branch of biology that is difficult to learn using textbooks because of its limitations in displaying anatomical objects in two-dimensional media. VR can display anatomical objects in the form of a three-dimensional virtual world. Besides being assisted by its immersive appearance, the interactivity learning system can also be improved by using the appropriate VR control device. In this study, three controls were used with different features and functions, namely VIVE Controller, Leap Motion Controller, and Senso Glove, and a user experience study was conducted. The user was asked to use the anatomy learning system with three different control devices, and then the user was asked to fill out a survey form, which uses the Liker scale. The survey focuses on the level of acceptability and user satisfaction in the usability factor, ease of learning, the suitability of movement, suitability of display, and haptic feedback provided by each VR controllers. From this study, it was found that the VIVE Controller is superior compared to the Leap Motion Controller and Senso Glove in terms of usability, ease of learning, movement suitability, and display suitability. The senso glove is superior in terms of haptic feedback satisfaction.
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