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Data transmission, security and authenticity, nowadays is considered the major source of problems. To face these problems a suitable solution have to be forwarded . Steganography is forwarded one of the solutions as a technique among many. This paper includes proposal for using a new technique called (Quick Respond Codes) QR Codes . QR Codes technique is mainly used to convert and store messages since it has higher and large storage capacity, in addition to that we used, in this paper , the STR (Short Tandem Repeats) DNA sequence. STR DNA is very important because each person has its own DNA which means that security and authentication ) reliable ( are very high. The proposed method is to convert the hidden data (STR DNA sequence) to QR code that mean the security is at maximum. Then, by using the MD5 (Message Digest 5) Algorithm, the result data is converted to QR code and the data within the data areas are stored in an unusually large format to make retrieval difficult. Finally, STR DNA sequences were applied in different lengths and converted to QR code. By this method , the QR code is applied in different applications and it was very fast (3-4 second). To apply this technique and to reduce the cost, we use a webcam to get back the private (confidential) data from the QR code. The data were retrieved completely without any error because QR code is reliable and authentic. From the above result we suggest to use QR Code for indentification of the of the individual (ID).

The present study included an application of new method of steganography using DNA sequence as a media for hiding. This method is considered a secret cover for the secret message (text, image), avoid attention of unauthorized person in addition to be inextricable since it needs high effort, long time and well background in biology. Hiding secret message in a known DNA sequence belongs to prokaryotic organism was conducted. The DNA sequence obtained from EBI location (European Bioinformatics Institute). Among the DNA molecule characters, one of the mutant ability types, that is the silent mutant, was choose to hide a secret message within the sequence. Then the sequence with the hidden message was sent to receiver via many methods. For more precaution the DNA sequence with the message was hide as a colored image with different dimensions and extension (BMP, PNG). However, image quality remain unchanged. Results of study revealed high hiding ratio.

The present study included an application of new method of steganography using DNA sequence as a medium for hiding. This method is considered as a secret cover for the secret message (text, image), avoid attention of unauthorized person in addition to be inextricable since it needs high effort, long time and well background in biology. A Sequence of DNA has been synthesized chemically depending on the text secret message via using tables of symbols formed from English letter, numbers and special characters. Each symbol has been represented on codon and the symbols were arranged in the table in descending order depending on English letter frequency and codon frequency (Genes). The DNA sequence has been synthesized by Korean Bioneer Company (sender), then the sequence has been read in university of fatih (the receiver) by DNA Sequence 3310, the results revealed high similarity between sequence of the sender and receiver. And proved that the method is protected very well against analysis and stegoanalysis.

Thermostone industry is constantly evolving After its emergence as a distinctive building material, especially in terms of thermal and sound insulation, lightness and the preference for its use in construction, due to the speed of implementation and low costs, its use as reinforced panels was developed and was not limited to block walls only, this material began to appear in some buildings as a material to fill concrete structures and a material for creating partitions, and then it was adopted as a basic building material and it will have an effective role when integrating the industry of open system building systems that can be developed. This research examines ways to enhance specifications and create a thermostone building system that, in terms of function, performance, and construction techniques, both meets the needs of regional architecture and the technical development process as a whole. The research's goal is to increase the requirements of thermostone by introducing additives like polypropylene at a rate ranging from 1 to 5%. The addition of sodium sulfate (Na2SO4) or organic fumigants (phosphine and sulfur) as well as three percentages, where 20% produced the best results. The substitution of a portion of one of its constituent materials with another component, as in the replacement of 2% of sand with fly ash powder after re-grinding it to a fineness of 75-85 micrometers to suit the mixing process and the use of white sand with a purity of up to 95%. The best results were obtained when replacing a powdered glass (the best replacement percentage is 10%). the best formation percentage is 0.12%, and the research regulated the ratios of the original thermostone ingredients, such as aluminum, with decrease and increase to achieve the best outcome.

The primary goal of photovoltaic panels is to generate electricity. The efficiency of solar systems, in particular photovoltaic panels, is generally low. The performance of PV panels depends on many parameters, such as temperature. Studies have shown that panel efficiency decreases at a rate of (0.45 - 0.65) per one degree Celsius, so the decrease in temperatures of the photovoltaic cell leads to Higher performance, and therefore requires keeping the photocell as cool as possible. This can be achieved through the cooling system, which not only enhances the electrical efficiency of the PV module but also reduces its rate of deterioration over time, thus extending its life. In addition, the excess heat removed by the cooling system can be used in many applications. There are many cooling technologies available, including the use of air or water as the working fluid with motion generated by the circulation of the water, forced water heat exchanger, water mist, or the use of fans to circulate air. The cooling process using water is more effective than air, as the average temperature decreases from (9-17) degrees Celsius. This paper presented a review of relevant literature on active cooling for thermal regulation and electrical efficiency enhancement of PV modules. Research conducted in this field has shown that these techniques have been successfully applied to improve the efficiency of photovoltaic cells under various conditions. [ABSTRACT FROM AUTHOR]