Hand on head. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Hand on head. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

This is a simple and amazing experiment. Put your hand on your head and ask someone to move your hand. Here, too, it seems that the viewer is exhausted. He may push, he may pull, he will try to raise his hand, but he will not be able to do anything.

Focus secret:

You don't have to apply any force or pressure here. A very effective way to show this trick is to invite two spectators. Tell one that you will make him strong, and tell the other that you will deprive him of his strength.

Have the first viewer put their hand on their head without pressing. Invite the second viewer to remove the hand of the first viewer by pulling on his hand. Both spectators will be surprised: the first by the fact that, with almost no effort, he can resist the actions of the second; the second is that, no matter how hard he tries, he cannot succeed.

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Random news from the Archive

Multi-level ROM memory cells 28.06.2013

Toshiba and TSMC have developed an MROM (read-only) memory mask that has a high data density by storing a few bits per cell.

Conventionally, the ROM mask is formed by the intersection of a single word and bit lines and stores a single bit in a cell, depending on whether the diode connects them or not. However, due to the instability of the manufacturing process in advanced technologies and the narrowing of the cell transistor channel area, the access time in the 40nm process is increased compared to the previous generation of processes.

At the VLSI Circuits Symposium last week in Kyoto, Japan, Toshiba announced that it has developed a multi-bit cell that covers twice the area of a standard single-level cell.

The article considers a three-wire programmable cell (TWPC), which consists of a single transistor with three bit lines and stores two bits of data in the cell. Toshiba released memory in a 40nm process in a 1Mbit test chip and reported a 38% improvement in access time through the use of TWPC. Power consumption in active mode and standby mode is kept at the same level as a standard cell. The circuit also triples the operating characteristics of the cell without any change in memory capacity per unit area. This reduces the impact of instability in the manufacturing process by 42%, Toshiba said.

The main purpose of an MROM is to store downloadable data or organize ROMs that can then, when the hardware is turned on, load other software from the non-volatile memory. However, the amount of MROM required for system-on-a-chip applications is increasing for devices such as smartphones and tablet computers.

Toshiba said the company aims to bring to market SoCs for digital applications in 2014 that implement a multi-bit MROM cell. However, in an article following Toshiba's announcement, foundry chip supplier TSMC said it had created a two-bit ROM cell using a 28nm process. The article considers a two-step decoding scheme that is suitable for single-wire or differential reading. TSMC reported that their 28nm low-power process design improves access time by 30% and is powered by 190mV less voltage.

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