This study was conducted in Diyarbakır (Turkey) 2019 to determine the effects of natural insecticides, spinosad, azadirachtin and kaolin, on fourth instar nymphs adults Stephanitis pyri (Fabricius, 1775) (Hemiptera: Tingidae). The under laboratory conditions; 25 ± 1ºC, 65 5% humidity 16:8 h L:D photoperiod. mortality 3 6 d after treatment with kaolin 49, 44 11%, 54, 51 47%, respectively. 75, 11...

This paper introduces a new method for approximating the Biot-Savart integral for elliptical Gaussian functions using high-order interpolation and compares it to an existing method based on small aspect ratio asymptotics. The new evaluation technique uses polynomials to approximate the kernel corresponding to the integral representation of the streamfunction. We determine the polynomial coeffic...

background and aim: human beings receive a variety of sounds in their everyday lives. these sounds are generated by different sources, and are heard simultaneously or with a small time sequence. a characteristic of the auditory system is its ability to analyze complex sounds, and to make decisions about the source of each constituent part of these sounds. the present study intends to assess nor...

This study investigates strategies available to listeners for classifying tone scrambles: rapid, randomly-ordered sequences of pure tones drawn from the thirteen notes from G5 to G6. In a given condition, the listener strives to classify each scramble in accordance with a specified feedback rule. For each of three conditions (“structured-random,” “major-minor,” and “squeezedspread”), we measure...

We address the peak-to-average power ratio (PAPR) of transmission signals in OFDM and consider the performance of tone reservation for reduction of the PAPR. Tone reservation is unique among methods for reducing PAPR, because it does not affect information bearing coefficients and involves no additional coordination of transmitter and receiver. It is shown that if the OFDM system always satisfi...

This paper presents a didactic mathematical method to evaluate the self-inductance of a nonmagnetic core single-layer cylindrical and helicoidal coil presenting voids between turns. This type of calculation, using Biot–Savart Law, is not usually presented in the traditional electromagnetic text books, but constitutes an excellent tool to show to the students how to apply the very important Biot...

One of the major drawbacks of OFDM is high Peak to-Average Power Ratio (PAPR) which can result in poor power efficiency and serious distortion in the transmitter amplifier. Tone Reservation (TR) is a technique designed to combat this problem by reserving a number of carriers (tones) in the frequency domain to generate a cancellation signal in the time domain to remove high peaks. However TR can...