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Searching for variable stars in open clusters: a new algorithm and application

Deep photometry of open clusters was made in order to find unidentified eclipsing binaries. We selected the clusters NGC 7243 and NGC 6940 based on their age, location on the sky and stellar density. We used our own algorithm based …

A New Way of Reducing the Friction of ships Based on the Biological Characteristics of Earthworm

In order to reduce the friction between ships and water, based on the biological characteristics of dorsal pores of earthworms, the author put forward a design of plates with holes. In the experiment, the author used per-experiments, control experiments and …

Meteorological observation of the vertical structure of the troposphere

In our project, we dealt with the radiosonde to see how one can proceed to the weather forecast and to study the variation of meteorological parameters against the altitude above sea level in the troposphere. At first, we searched online …

Les mystères de la Tasse (A mysterious cup)

A cup or a glass is able to produce sounds sometimes strange, as the one you can hear when you struck a cup that contains hot milk and in which you added chocolate powder. Indeed, the frequency of the sound …

TrogloByte

Caves always are objects of scientific interest but they present serious challenge for many researches. Exploring caves is a dangerous and resource consuming process, but our project aims to change that by replacing human explorers with distantly controlled robots. Similar …

Liquid stream hits rough surfaces – showing an extraordinary and stable wave pattern

A steady stream of water, hitting a rough surface (e.g. a wooden board) perpendicularly, yields a surprising result. A water wall encloses a regular spiral pattern centered on the water stream. The objective of our paper is to both explain …

Optimization of dielectric properties in sodium bismuth titanate (NBT) containing compounds

People all over the world desire to live in uncontaminated environment. Many European Union directives state that member countries should restrict the wide usage of lead containing materials, as lead and lead zirconate titanate (PZT) containing compounds are toxic and …

Dynamic magnetization behavior in soft magnetic alloys of different structure

This study is devoted to the investigation of magnetization dynamics in soft magnetic alloys based on CoFeSi, FeSi and NiFe in amorphous, single crystal and polycrystalline state, respectively. Owing to the difficulties in the observation of dynamic variations in magnetic …

The Theory and Detection of Gravitational Waves

This paper outlines the detection of gravitational waves and the theory behind them in a simple way. It identifies the type of the source (two rotating black holes), their theoretical mass, total mass (70 M), distance from the earth (344 …