Indoor residual spraying—spraying insecticide inside houses to kill mosquitoes—is an important method for controlling malaria vectors in sub-Saharan Africa. We propose a mathematical model for both regular and non-fixed spraying, using impulsive differential equations. First, we determine the stability properties of the nonimpulsive system. Next, we derive minimal effective spraying intervals a...

The experimental study is done for technological parameters of high-melting metal arc spraying to study the influence of spraying current, spraying voltage and wire feed voltage on spraying arc and the influence of spraying current on coating temperature and analyze theoretically the distribution rules of spray gun jet speed field and temperature field and their influencing factors. The results...

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...

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...

The within-field spatial distribution of beneficial arthropods was assessed using two-dimensional grids of pitfall traps and suction sampling across two winter wheat fields of 4 and 16 ha, before and after an application of dimethoate. An unsprayed 6 m wide buffer zone was left around half the edge of the larger field. Arthropod numbers fluctuated to varying extents prior to spraying. Two speci...