The general spray gun is used for industrial large-area spraying, and there less demand different pressures the accuracy of spraying pressure, so mechanical pressure regulators are mostly used. However, as artistic innovation continues to grow, it promotes advent micro gun. currently commonly known an airbrush. mainly fine drawing, must provide with high precision pressures, but existing cannot...

This paper presents a new Pulse Width Modulation (PWM) controller for Unmanned Aerial Vehicle (UAV) precision sprayer for agriculture using a TL494 fixed-frequency pulse width modulator together with a data acquisition board and developed software. An UAV can be remotely controlled or flown autonomously by pre-programmed flight plans. The PWM controller was implemented through the guidance syst...

Heap-spraying is an attack technique that exploits memory corruptions in web browsers. A realtime detection of heap-spraying is difficult because of dynamic nature of JavaScript and monitoring overheads. In this paper, we propose a runtime detector of heap-spraying attacks in web browsers. We build a string trace graph by tracing all string objects and string operations in JavaScript. The graph...

Research shows that the accurate acquisition of flight parameters plant protection UAV and evaluation parameter quality have great significance for improving effect precision spraying. In order to further improve accuracy UAV, this study conducted an experiment using a laser tracker. The experimental results showed current used average altitude speed onboard sensors determine whether it reached...

A mathematical model for the simulation of the removal of hydrophilic compounds using biotrickling filtration was developed. The model takes into account that biotrickling filters operate by using an intermittent spraying pattern. During spraying periods, a mobile liquid phase was considered, while during non-spraying periods, a stagnant liquid phase was considered. The model was calibrated and...

The objective of this study was to evaluate the effect of vector control and elimination of infected dogs on the incidence of infection with Leishmania chagasi. A randomized community intervention trial was carried out in Teresina between 1995 and 1996. The area was divided in 34 blocks randomically allocated to 4 types of intervention: 1) spraying houses and animal pens with insecticide; 2) sp...

Heap spraying is a security attack that increases the exploitability of memory corruption errors in type-unsafe applications. In a heap-spraying attack, an attacker coerces an application to allocate many objects containing malicious code in the heap, increasing the success rate of an exploit that jumps to a location within the heap. Because heap layout randomization necessitates new forms of a...

Aiming at addressing the uneven pesticide distribution when spraying high-spindle apple trees, parameters of a homemade profiling boom sprayer were analysed, and optimal parameter combinations determined. Fluent was used to simulate spray for various values. The goodness fit (R2) with experimentally measured data 0.9270, which verified accuracy numerical simulations. response surface methodolog...

This thesis is a research for localization problem of an autonomous vineyard spraying robot. The project is motivated by the lack of manpower to perform the vineyard spraying task and the exposure to hazardous pesticides during the spraying. Localization is a fundamental problem in the field of autonomous mobile robotics. In order to allow basic autonomous functionality of a robot, Position and...