The absence of sufficient theoretical developments regarding the essence and content registration, permit license procedures provided by National Police Ukraine is emphasized. In this regard, following research tasks were formulated: 1) to establish specificity legal nature registration permit-licensing as a public service activity police bodies; 2) determine categories “services” “administrati...

Ammonium and potassium perchlorate are strong oxidants widely employed in the pyrotechnic compositions in fireworks. Although its reduction is thermodynamically highly favorable, the perchlorate anion’s reactivity is kinetically inhibited, primarily attributable to steric hindrance of access to the central chlorine atom within the tetrahedral ClO4 structure. This relative inactivity has histori...

INTRODUCTION Blackbirds and starlings (Sturnus vulgaris) often establish large winter roosts in areas where their presence is objectionable because of economic, public health, and nuisance reasons. Several techniques are available for alleviating roost problems, including habitat manipulation, roost dispersal with mechanical and pyrotechnic devices (Mott et al 1978), and, where necessary, direc...

1. INTRODUCTION Nitrogen-rich compounds are unique very reactive substances which have high heats of formation. Pyridine is one of the most well known aromatic cycles where a CH is replaced by a nitrogen atom, but the pyridine ring is only one member of the azine heterocycles, in which one or more CH group of benzene is replaced by π-accepting and σ-donating nitrogen atoms, proceeding from diaz...

Explosibility and ignitability studies of air/cork dust mixtures were conducted in a near-spherical 22.7 L explosibility test chamber using pyrotechnic ignitors and in a furnace of 1.23 L. The suspension dust burned as air-dispersed dust clouds and the uniformity of the dispersion inside the chamber was evaluated through optical dust probes. The range of tested particle sizes went from a mass m...

T he year 2010 was a busy one, but I didn't expect it to go out with a bang – literally. I was visiting friends in Copenhagen to celebrate the new year. We were getting ready to start the countdown to midnight when the building shook. Puzzled, we looked outside to find that someone on the street below had accidentally shot a firework into the apartment building. Luckily, its builders made sure,...

In the ekpyrotic scenario the Universe is initially collapsing, the energy density coming from a scalar field with a negative exponential potential. On the basis of a calculation ignoring the gravitational back-reaction the authors of the scenario claim that during collapse the vacuum fluctuation creates a perturbation in the comoving curvature, which has a flat spectrum in accordance with obse...

In the early 1980s, a method for controlling blast vibrations other than by modifying the Scaled Distance came into use. Research studies had indicated that blast vibration could be simulated by detonating a signature hole with the vibration monitored at critical locations, and then using a computer to superpose the waveforms with varying delays. By choosing delay times that create destructive ...