This paper describes Rubik’s cube manipulation as an example of highly demanding benchmark task for two-handed service robot. Vision is used both for acquiring the cube (servoing) and identifying its initial configuration. During two-handed manipulation force/torque measurements are used to prevent jamming of the cube. Rubik’s cube solver, nominal trajectory generation, visual servoing, and pos...

Hummingbird is a novel ultralightweight Cryptographic Algorithm aiming at resource-constrained devices. It has a hybrid structure of block cipher and stream cipher and was developed with both lightweight software and lightweight hardware implementations for constrained devices in mind. Moreover, Hummingbird has been shown to be resistant to the most common attacks to block ciphers and stream ci...

In this note we determine the set of expansions such that a partial cube is planar if and only if it arises by a sequence of such expansions from a single vertex. This corrects a result of Peterin.

With specially arranged inducing elements on a white surface of uniform luminosity, a phenomenally complete Necker cube can be seen in any array where only the 'corners' of the cube are physically represented. The subjectively seen bars of the cube disappear when the inducing 'discs' are seen as 'holes' in an interposing surface, through which the corners of a partially occluded cube are viewed...

Hierarchical clustering has been proved an effective means for physically organizing large fact tables since it reduces significantly the I/O cost during ad hoc OLAP query evaluation. In this paper, we propose a novel multidimensional file structure for organizing the most detailed data of a cube, the CUBE File. The CUBE File achieves hierarchical clustering of the data, enabling fast access vi...

Big data is large volume, heterogeneous, distributed data. Big data applications where data collection has grown continuously, it is expensive to manage, capture or extract and process data using existing software tools. For example Weather Forecasting, Electricity Demand Supply, social media and so on. With increasing size of data in data warehouse it is expensive to perform data analysis. Dat...

The multidimensional analysis based on data cube has been growing interest. However existing data cube model usually does not have the semantics of attributes and hence the analysis usually provides results with raw numbers and ignores the real meanings of these numbers. An example result is that the total sales of PC in this year are above 2000. The semantics of sale performance, high or low, ...

Polarization conversion cube-corner retroreflectors rotate the major axis of the incident electric field by 90°. We show that polarization conversion cube-corner retroreflectors cannot be created with isotropic reflecting surfaces, but can be created by incorporating nonisotropic reflecting surfaces. Two types are considered-cube corners with surfaces having elliptical eigenstates and cube corn...