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A conventional hill climbing method is not capable of tracking a maximum power when a shadow covers a part of a solar cell panel and a plurality of maximal values is thereby developed. The invention provides a photovoltaic power generation system control method that controls a photovoltaic output setting value to be an appropriate value by following up a variation in the solar irradiation, including a genetic algorithm process of employing the photovoltaic output setting value as a gene and the output power as an evaluation value thereof; randomly extracting a plurality of genes and repeating storage, selection and crossover / mutation of the output powers which are the evaluation values of the genes, so as to converge a difference between a maximum and minimum values of the output voltages into a predetermined range; and a hill climbing process of setting the photovoltaic output setting value corresponding to the greatest value of the converged output voltages, and a greater and a lower value than the photovoltaic output setting value by a predetermined amount, so as to select the greatest output power among these values; and repeating such steps to track the maximum output power.

Methods and devices are disclosed that provide treatment for neurological strokes and other conditions related to obstructed, hemorrhagic or compromised vascular circulation.

A non-volatile memory system having an array of memory cells with at least one storage element each is operated with a plurality of storage level ranges per storage element. A flash electrically erasable and programmable read only memory (EEPROM) is an example, wherein the storage elements are electrically floating gates. The memory is operated to minimize the effect of charge coupled between adjacent floating gates, by programming some cells a second time after adjacent cells have been programmed. The second programming step also compacts a distribution of charge levels within at least some of the programming states. This increases the separation between states and / or allows more states to be included within a given storage window. An implementation that is described is for a NAND type of flash EEPROM.

A method for predicting nicotine replacement dosage to achieve a target nicotine serum concentration relies on measuring blood nicotine concentration prior to smoking cessation. At least two values corresponding to other patient characteristics, such as body mass, cumulative smoking, psychological dependence, age, and menopausal status, are also determined and used to predict expected blood nicotine concentrations based on nicotine replacement dosages. Such methods are useful in achieving target blood nicotine concentrations for smoking cessation and therapy.

A clinical reference and education system and method of use, wherein medical condition diagnosis information is gathered, stored, and distributed. More specifically, information regarding clinical / pathological differential analyses, key facts, clinical presentations, pathology features, imaging findings, anatomy information, medical references with abstracts, expert imaging center information, continuing medical education information, and related data is made available in electronic and printed forms via a general infrastructure of the present system.