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Design and Performance Analysis of Compact Microstrip-fed Multiple Edge Slotted Monopole Antenna for Wideband Applications
The experiment was conducted at the Horticulture farm, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh, during the period from May 2012 to August 2012. Summer tomato seedlings were sprayed with four levels of maleic hydrazide viz. 0, 20, 40 and 60 ppm were arranged in Randomized Complete Block Design with three replications. Plant growth retardant- maleic hydrazide @ 60 ppm decrease plant height, increases number of leaves, branch, flowers (33%) and fruits (35%) plant -1 . It also increases individual fruit weight and yield of tomato ha -1 about 32% and 57%, respectively but it did not affect the fruit length and diameter.
The purpose of the study was to determine the challenges facing implementation of free primary education in Kenya today using Githunguri district in Kiambu County as a case study. The study sought to identify the factors that have lead to poor implementation of the free primary education. The target population is the 30 public primary schools in the district. A census method of data collection was used. The study revealed that public primary schools in Githunguri district are facing numerous challenges in terms of performance, administrative, and financial. This have in turn impacted negatively on the smooth implantation of the program.
Wireless mesh networks (WMNs) have gained considerable interest in expanding IEEE 802.11 networks to large-scale enterprise and community scenarios, primarily because of its capability of providing wide-band network access to a significant number of users. However, the mesh nodes are typically limited in resources such as bandwidth, computation power and memory. Capacity limitation is one of the fundamental issues in wireless networks. Excess capacity(EC) is the unused capacity. Here in this paper EC Management techniques are used to improve network performance.
The Students’ Variables as Predictor of Secondary School Students’ Performance in Science in Ikere Local Government Area of Ekiti State, Nigeria was investigated in this study. The study adopted a survey research design of the ex-post facto type. The sample comprised 125 senior secondary school II science students drawn from the five secondary schools in Ikere Local Government Area of Ekiti state.
If productivity before motivation proves elusive, then it is wasteful to ensure consistent preaching of same. The best rather than discretionary approach is to apply the complete reversal of this working guideline. Efforts need to be channeled to motivating teachers to measure up to the required standard of performance. But it would be untenable if the teachers concerned did not require any more motivation
This paper presents the generation of optical carrier suppressed signal for RoF system. RoF refers to an analog transmission over fiber technology where light is modulated by radio frequency (RF) signal and transmitted over an optical fiber link to wireless access. Both optical carrier suppression and signal modulation are made by using a Dual-Drive Mach-Zehnder modulator (DD-MZM). Suppressed carrier modulation is achieved by biasing at the null point of DD-MZM. Optical carrier suppression improves the performance of RoF system such as link gain and noise figure (NF).In this research, a single RF at 2100 MHz having data rate of a 1 Gbps modulates the 1550.12 nm optical carrier in the DD-MZM. In this paper, the carrier suppression and performances of RoF system are investigated by theory and simulation. The various values of optical carrier suppression ratio can be obtained by adjusting the extinction ratio of the DD-MZM.
The Z-Source concept has many advantages and can be applied for any type of power conversion. Both boosting and modulation index can be controlled in inverter operation itself, by inserting proper shoot through states. This paper presents procedure for implementing, space vector modulated REC Zsource inverter in MATLAB SIMULINK by inserting shoot through states. It also explains a clear procedure of selection of shoot through states at required time and presents an overall tabular column of the sequence of switching states for three level space vector modulation. The proposed techniques are demonstrated in MATLAB and have achieved good performance results.
This paper presents the design of different filtering techniques for the Neuro-Biomedical signals in single electrode EEG collected Brainstem Speech Evoked Potentials data of Audiology for the Signal-to-Noise Ratio performance evaluations. We have designed Yule-Walk multiband filter, Cascaded Yule-Walk-Comb-Peak filter; conventional Wavelet transform filters of Daubechies, Symlet, Coiflet Wavelets for these Auditory Brainstem Responses. In addition we have designed a Translation-Invariant (TI) Wavelet estimation filtering technique which is highly useful. In our research the idea of Cascaded Yule-Walk-Comb-Peak filter is giving us a considerable improvement in SNR over Yule-Walk filter; and the conventional wavelets are performing far better that too specifically Daubechies wavelets are performing better than all. The TI wavelets technique is performing exceptionally well and better than conventional wavelets.