Low-density parity-check (LDPC) codes were introduced in 1962, but were almost forgotten. The introduction of turbo-codes in 1993 was a real breakthrough in communication theory and practice, due to their practical effectiveness. Subsequently, the connections between LDPC and turbo codes were considered, and it was shown that the latter can be described in the framework of LDPC codes. In recent...

A tanulmányban egy 3D nyomtatóhoz készítend?, filament extrudálására használható készülék megtervezése és összeszerelése kerül leírásra. nyomtatás napjainkban széles körben hasznosított technológia. Sajnálatos módon azonban a f? alapanyag m?anyag, legtöbb esetben nem környezetbarát, viszont újrahasznosítható. darabok megfelel? méretre aprítás után az anyagtól függ?en meghatározott h?mérsékleten...

In order to improve the coefficient of performance (COP) of a heat pump cycle by using carbon dioxide (CO2), an expander that recovers rotation power from the large pressure difference in the cycle to use the power to partially drive the cycle was developed. In the cycle a two stage rotary expander was adopted because the suction control mechanism is not necessary in it. In the development proc...

A mathematical model has been built which includes thermodynamic, mechanical and generator models. Then, the starting procedure of scroll expander driven by compressed air has been simulated. The rotating speed and stable time influenced by the suction pressure, discharge pressure and load resistance have been analyzed. The results show that the starting procedure of scroll expander is determin...

BACKGROUND Neoadjuvant chemotherapy (NAC) has been administered since the 1990s and is now one of the major treatments for breast cancer. It can achieve extremely positive results in some patients. Whether NAC affects immediate breast reconstruction (IBR) using an expander, however, remains unclear. METHODS A retrospective study was performed at Tokyo Medical and Dental University (TMDU) hosp...

A twin-screw extruder and a rotational rheometer were used to generate shear forces in concentrated gelatin inoculated with a heat-resistant isolate of a vegetative bacterial species, Microbacterium lacticum. Shear forces in the extruder were mainly controlled by varying the water feed rate. The water content of the extrudates changed between 19 and 45% (wet weight basis). Higher shear forces g...

BACKGROUND The authors aimed to quantify overall patient satisfaction with three breast reconstruction techniques and identify factors that have influenced satisfaction. METHODS Two hundred sixty-eight questionnaires were mailed at least 6 months after immediate breast reconstruction to consecutive breast reconstruction patients over a 3-year period. A second questionnaire was sent out 9 mont...

Pelleting is the most extensively used thermal processing method in feed industry. In this article, a single pellet press device was developed to investigate pelleting of animal feed. Effects moisture content (10%-18% w.b.), preheating temperature (60°C-100°C) and maximum compression force (0.2-0.6 kN) on were determined analyzed, as well energy consumption. The results showed that unit density...

We aimed to evaluate a new technique for intraoral expansion of soft tissue with a self-inflatable expander in rabbits. We placed a self-inflatable soft tissue expander bilaterally in eight rabbits under the periosteum of the mandible through an extraoral approach. The expander was left to self-inflate for two weeks, after which the animals were killed and specimens collected for histological e...

An optical system called the optical expander is described and investigated. The optical expander electro-optically expands an optical Boolean pattern encoded in d bits into an optical pattern of size N bits. It is assumed that d is equal to c log(2)N for some constant c, and each expanded pattern is orthogonal to the others. Two different architectures to implement the optical expander are des...