Smart internet of things kindergarten garbage observation system using Arduino uno

Increase the in population and kindergarten number, especially in urban areas made it difficult to properly manage waste. Thus, this paper proposed a system dedicated to kindergartens to manage to dispose of waste, the system can be called smart garbage based on internet of things (SGI). To ensure a healthy environment and an intelligent waste in the kindergarten management system in an integrated manner and supported by the internet of things (IoT), we presented it in detail identification, the SGI system includes details like a display system, an automatic lid system, and a communication system. This system supplied capabilities to monitor the status of waste continuously and on IoT website can show the percentage of waste placed inside the bin. And by using a Wi-Fi communication system, between the system unit and the monitoring body, to collect waste when the trash is full. The smart system proposed in this paper is the most efficient system of traditional waste management systems because it reduces the use of manpower and significantly limits the spread of waste and fully controls it. Additionally, it can be linked via the IoT to the mobile, thus forming an integrated monitoring system

Evaluation of the Effect of Nano and Micro Hydroxyapatite Particles on the Impact Strength of Acrylic Resin: In Vitro Study

Poly (methylmethacrylate) is considered the basis material for a denture base. However, such substance has some drawbacks such as poor impact resistance, which is thought to be the primary cause of fracture of denture base resins. The purpose of the study was to determine how Nano and Micro hydroxyapatite particles affected the impact strength of acrylic resin. Thirty specimens were constructed of heat-cured acrylic resin and were divided into three groups: Ten specimens for the control, 10 for 1%nano hydroxyapatite, and 10 for micro hydroxyapatite. Acrylic samples were subjected to an impact strength test via a Charpy-type. Data were then analysed using SPSS v20. The ANOVA test was used for comparison among the groups. Highly statistically significant differences among all studied groups (P-value <0.0001). Both 5% Micro hydroxyapatite and 1% Nano hydroxyapatite had a higher mean value than the control. Incorporating Nano and Micro hydroxyapatite into PMMA improved the impact strength of acrylic resins

Evaluation of the impact of nano and micro-hydroxyapatite particles on the transverse strength and hardness of PMMA material

Poly (methyl methacrylate) is considered as the basis material for a denture base. However, such substance has some drawbacks such as poor impact resistance, which is thought to be the primary cause of fracture of denture base resins. The purpose of the study was to determine how Nano and Micro hydroxyapatite particles affected the transverse strength and surface hardness of Poly methyl methacrylate. sixty samples were prepared in total and divided into 2 main sets according to the test used (surface hardness and transverse). For each test, there were 3 groups (control, 1% HA nanofiller and 5% HA microfiller) and each group had 10 samples. All samples were subjected to transverse strength and Hardness test. Data were then analyzed using SPSS v20. The ANOVA test used for comparison among the groups. The addition of Nano and Micro hydroxyapatite to polymethyl methacrylate (PMMA) decreased the transverse strength of the heat-polymerized acrylic resins. Furthermore, the incorporation of Nano and Micro hydroxyapatite improved the surface hardness of the heat-polymerized acrylic resins. Incorporating Nano and Micro hydroxyapatite to PMMA improved the sur-face hardness and decreased the transverse strength of acrylic resins