Herein we describe the nests (including construction, closure, orientation, and depth of cells) of the bee Osmia (Ozbekosmia) avosetta Warncke found nesting near Antalya, Turkey, and Sepidan, Iran. Cells are unusual in that they are lined by two layers of colorful flower petals that sandwich a thin middle layer of mud. Analyses of pollen taken from scopal hairs of specimens from the Turkish sit...

This study presents a study of the application of a Unified Power Flow Controller (UPFC) to control power transmission, generator terminals voltage and better damping of Low Frequency Oscillation (LFO) in Single-Machine Infinite-Bus (SMIB) power system. The UPFC integrates properties of both shunt and series compensations and can effectively alter power system parameters in a way that increases...

The development of a rapid, highly sensitive, and dependable acetone sensor holds significant importance for human health safety. To enhance the sensing performance LaFeO3 nanoparticles practical applications, commercial n-type WO3 were incorporated as additives. They directly mixed with produced through sol-gel method, creating series WO3-LFO nanocomposites varying mass ratios. These character...

Dehong Zeng, Aldo Ferrari, Jens Ulmer, Alexey Veligodskiy, Peter Fischer, Joachim Spatz, Yiannis Ventikos, Dimos Poulikakos, Ruth Kroschewski * Laboratory of Thermodynamics for Emerging Technologies, ETH Zurich, 8092 Zürich, Switzerland # Institute of Biochemistry, ETH Zurich, Schafmattstr. 18, 8093 Zürich, Switzerland § Max-Planck-Institute for Metals Research & University of Heidelberg Dept. ...

Low-frequency oscillation (LFO) of the synchronous generators in power systems by wind is boring. To improve robustness damping control scheme, this paper applies sliding mode (SMC) at doubly fed induction generator (DFIG), with parameter SMC optimized eigen-sensitivity. The originalities lie in, (1) states strongly associated critical modes are newly applied to design surface, (2) closed-loop ...

This paper presents the time variant vectored comb filter. It is an extension of the feedback delay network to time variant and nonlinear domains. Effects such as chorus and flanger, tap delay and pitch shifter are examined in the context of the feedback scheme. Efficient implementation of a stateless vectorizable LFO for modulation purposes is presented, along with a recursive formulation of t...

We present a new class of digital audio effects which can automatically relate parameter values to the tempo of a musical input in real-time. Using a beat tracking system as the front end, we demonstrate a tempo-dependent delay effect and a set of beat-synchronous low frequency oscillator (LFO) effects including auto-wah, tremolo and vibrato. The effects show better performance than might be ex...

this paper presents a method for damping of low frequency oscillations (lfo) in a power system. the powersystem contains static synchronous series compensators (sssc) which using a chaotic harmony searchalgorithm (chsa), optimizes the lead-lag damping stabilizer. in fact, the main target of this paper isoptimization of selected gains with the time domain-based objective function, which is solve...