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Mathemagic

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The flowing emotional based mathematical skill can be what 21st century society requires. We could have more than one extraordinary skill which can not catch up quickly by others.

Wireless System Modeling

Noise modeling n 1 , ..., n NK are independent complex Gaussian noise terms with unit variance Fading Modeling We consider a block fading channel with iid Rayleigh fading from block to block. The channel coefficients are iid complex Gaussian with unit variance.

Downlink Beamforming

In wireless communications, either more spectrum or higher spectral efficient communication technologies can increase the data rate, which enables to service various multimedia contents. Since frequency spectrum is a natural resource, it is inherently limited so that it costs very high. Therefore, it is very important to find highly spectral efficient communication technologies. However, new good technologies requires higher complexity in terms of development, installation and so on. Therefore, our research goal is either to optimize the current technology and to find a new innovative technology. Beamforming is a scheme to overcome the limitation of the spectrum resource. Beamforming is used for spatial division multiple access which increases the system throughput by spatially diving multiple user signals. Spatially diving let multiple users communicate simultaneously in a same frequency band. When beamforming is applied for the downlink transmission, we call it as downlink beamform...

True tree diagram for mind-map

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Tree diagram, or mind map, has been used for many areas including research, business, study. One of example programs to build tree diagrams is Freemind which is easy to use. While I use freemind, I suddenly felt that Freemind is needed to be upgrade with a new feature. Remind that tree diagrams in Freemind resembles not full structure but only a half part of a full tree. Recent half tree form mindmaps are convenient to show various divided facts effectively. However, it is not very effective to analyze facts and to tell a story about associated actions. Now, I propose the following new usage of tree based mind-map:

The gloomy fact

Do you fall in love? Scientists analyzed the brain whose fell in love to know why they feel good when they love by MRY. In conclusion, scientists found out that three part of the brain have a brisk response. One is the area of ventral tegmental that is down part of the brain. Here, it makes dopamine a kind of hormone. The reason why the delicious cooking smell makes our mouth water is that dopamine is activating. However, if only ventral tegmental activates, you can not continue to love. Also, it is problem to find new love only in ecstasies by dopamine. Therefore there is the nucleus accmbens that prevents you from bing with rapture and is a little front of upper part of ventral tegmental. This tingling feeling that originates from ventral tegmental delivers over here, at that time serotonin and oxytocin kinds of hormone have a response together and stimultaneously of the two, oxytocin plays the key role to bind firmly. In brain, the last settlement of the feeling love is caudate ...

Missing Lester Young~~

I am a sort of Jazz fan. So to speak, I am interested in traditional Jazz played earlier than 'Bitches Brew' of Miles David. My favorate is Lester young who was called as 'Prez'(derives from president of Jazz) in 1930s through 1950s. Days ago, I stopped by a CD shop to buy one of his masterpieces. However, He seemed to be so old-fashioned that his booth disapeared. People don't know how beautiful classical Jazz is! His blowing is romantic and elegant so as to captivate us. I compared his playing with Coleman Hawkins who was the most popular saxophonist in 1930s, at the same time, remained the legend even now. Lester young's tone is relaxed, cool and quitely soft while Coleman hawkins is full of being masculine and powerful in his atmosphere. On listening Young's playing, I was fascinated with his music. His album changed my fixed idea over timber of tenor saxophone. It sounded a poem or an ode. I could imagine that I was under the sunny side when I listened ...

Cognitive dissonance

The term 'Cognitive dissonance' was created by Leon Festinger, a social psychologist and professor, in 1957. He infiltrated into an eschatological religious group which were waiting for doomsday caused by 'Great flood'. They seemed to trust in a leader's direction sincererly. However, the last day supposed to perish didn't come. Festinger expected believers to get angry against their head of the group. But followers didn't show a wrath against the leader rather than they were relieved with no happening. Festinger recognized that human beings usually are skillful to deceive themselves to expel from unpleasant, irrational experience. To speak, we can't put up with our being weak or shabby enough to be hurted by other people and specific situaltions. On the contrary, we want to give an excuse not to violent against normal social system and strongly deny our wrong behavior or belief. It is really convenient system for our mental health. We are ready to defen...