This review of research on ultralow-volume (ULV) aerial sprays for mosquito control is a component of an Aerial SPray EXpert system (ASPEX). Topics include application volume, adulticiding, larviciding, droplet size, and meteorology. The review discusses the efficacy of ULV aerial sprays against many important pest and vector species of mosquitoes in a wide range of locations and habitats in th...

The filter cake, generated from the cold-purification stage in a zinc electrowinning plant and considered as a hazardous waste containing heavy metals, was characterized for its chemical and mineralogical compositions by inductively couple plasma-optical emission spectroscopy (ICP-OES), X-rays diffractometry (XRD) and scanning electron microscopyenergy dispersive X-rays spectrometry (SEM-EDS). ...

a paper-pot transplanter was designed, developed and evaluated in the field by transplanting sugar beet seedlings grown in paper pots. a ground-driven counter wheel equipped with an infra-red sensor measures the traveled distance and sends the corresponding signals to a micro-controller. a step motor controlled by the micro-controller turns the driving shaft of the paper-pot metering mechanism ...

This study was conducted to develop a software program which computes optimal path for autonomous navigation in orchard, especially for speed sprayer. Possibilities of autonomous navigation in orchard were shown by other researches which have minimized distance error between planned path and performed path. But, research of planning an optimal path for speed sprayer in orchard is hardly founded...

An earlier application note, "Coherent Sampling vs. Window Sampling," covered the basics of coherent sampling. It showed differences between tests performed with coherent sampling and windowed sampling conditions. The following technical discussion is a follow-up note, which deals with the proper selection of test tones and instruments to successfully test and evaluate a high-speed ADC's AC per...

Codecs used in telephone networks in the United States have a -law companding characteristic solely designed for the purpose of transmitting voice signals [1, 2]. These -law codecs are not well suited for the latest generation of high-speed digital voiceband modems requiring PCM data transmission at the quantization levels of the codec [3, 4, 5, 6, 7, 8, 9]. In this paper, we have shown that us...

In this investigation, the effect of friction stir processing (FSP) parameters such as rotational speed, traverse speed and plunge depth on the tensile strength of AA6063 aluminum alloy was studied. The experiments were carried out as per response surface methodology parametric design concepts to study the influence of various combinations of process parameters. Statistical optimization techniq...

The speed and torque of the hydraulic motor is controlled by controlling the hydraulic valve pump connected to the hydraulic motor. An electro hydraulic valve coupled to a hydraulic motor is a common method of motor speed control in practice where both load pressure and speed change during operation. In this paper, system equations that include, flow and toque loss term has been established by ...

Static high contrast ('dazzle') patterns, such as zigzags, have been shown to reduce the perceived speed of an object. It has not escaped our notice that this effect has possible military applications and here we report a series of experiments on humans, designed to establish whether dynamic dazzle patterns can cause distortions of perceived speed sufficient to provide effective defence in the ...

Original scientific paper In principle, an exhaust system influences the maximum output and characteristic of a two-stroke combustion engine. The first part of the contribution deals with the possibility of transformation in a maximum output and a range of exploitable speed values by means of the change of exhaust manifold length in exhaust pipe section. This knowledge covers an output curve va...