This article describes the most recent generation of full-custom analog integrated circuit that is intended for low-power, high-speed sampling of Radio-Frequency (RF) transients in excess of the Nyquist minimum. A direct descendant of the Self-Triggered Recorder for Analog Waveforms (STRAW) architecture, and earlier variants of the LABRADOR (Large Analog Bandwidth Recorder and Digitizer with Or...

A new scheme for the excitation of spins according to the joint values of their heteronuclear or homonuclear J couplings and of their chemical shifts, is proposed and demonstrated. The principles of the new pulses involved derive from those employed in NMR imaging for exciting arbitrary 2D spatial shapes, using so-called "multidimensional" RF pulses. It is shown that if recast in a suitable spe...

Acetylsalicylic acid commonly known as aspirin is the most widely used drug in the world today. Its analgesic, antipyretic, and anti-inflammatory properties make it a powerful and effective drug to relive symptoms of pain, fever, and inflammation. The purpose of this experiment was to synthesize aspirin by reacting salicylic acid and acetic anhydride in the presence of phosphoric acid to form a...

This paper presents a case study of a Wi-Fi system operating in the frequency of 2.4 GHz. Two certain types of WLAN environments are examined: a home environment (typical residence) and a complex office environment. Experimental acquired data, for both single floor and multiple floor scenarios, are compared with the theoretical values provided by an existing plethora of indoor RF models, which ...

A down conversion RF mixer is designed with 65nm CMOS technology for a different low power consumption applications. Mixer structure comprises a double-balanced Gilbert-Cell with improving linearity method in the RF stage of circuit; all is at a supply voltage of 1.8V and a power of 2.17 mW. The circuit is simulated for different spectrum applications as: 200 MHz mobile users, 1.9 GHz wireless ...

A 1D in position and 2D in velocity Particle in Cell with Monte Carlo Collision model of a low-pressure nitrogen discharge plasma has been coupled to a 1D reaction-diffusion kinetics for the whole vibrational ladder of the N2(X) state, for the vibrationally lumped N2(A), N2(B), N2(C), N2(a') states as well as for N atoms. The model includes several electron-molecule as well as molecule-molecule...

The seed protein contents and protein banding pattern were studied in commonly cultivated groundnut cultivars. The groundnut cultivars such as ICGV00351, TMV-7, CO-4,CO-6 and TG-374 were used for quantitative and qualitative analysis of seed proteins. The protein contents varied among the different varieties of groundnut. The maximum protein content was observed in CO-6 followed by CO-4, TMV-7,...

The paper analyzes the electromagnetic (EM) radiofrequency (RF) radiation hazards onboard a ship arising from shipboard radiocommunication and navigation equipment. EM field effect on personnel and equipment can be harmful if field levels exceed the threshold values. These fields need to be controlled for proper protection. Ships are equipped with lots of EM RF radiation sources with different ...

The Robinson–Foulds (RF) distance is the most popular method of evaluating the dissimilarity between phylogenetic trees. In this paper, we define and explore in detail properties of the Matching Cluster (MC) distance, which can be regarded as a refinement of the RF metric for rooted trees. Similarly to RF, MC operates on clusters of compared trees, but the distance evaluation is more complex. U...

We present a comparison of RF simulations with Ansoft HFSS and CST Microwave studio software, for a commercially available 7 T multi-channel coil. We investigated the conditions influencing precision and simulation time. When simulation parameters (such as mesh size) are appropriately selected and full coverage of the results is ensured, there is agreement between simulated and experimentally d...