Hybrid Cipher for Secure Multimedia by using AES and RC4 Chain

With development, technology, computer science, computer networks and transmission of multimedia between two or more parts, a security of multimedia becomes an essential issue since most of the systems became easy to attack. In this newspaper, we suggest amodel to Hybrid Cipher for Secure Multimedia by using AES and RC4 Chain. The analysis and evaluate the performance of this model ismeasured by testing several parameters. Show The resulting multimedia is found to be more distorted in hybrid Cipher

Projets situés: 10 ans d'expérience de terrain / 10 years of field experience

Ouvrage bilingue: français / anglaisCet ouvrage retrace la mise en œuvre du programme Africa 2009, initié par le Centre du patrimoine mondial de l'UNESCO, à travers des projets dits situés visant à améliorer les conditions de la conservation du patrimoine immobilier dans la région de l'Afrique subsaharienne tout en se positionnant dans le cadre plus large du développement durable. Cette publication illustre le dynamisme d'un réseau de professionnels aux capacités renforcées et se veut également être un instrument incitatif pour les professionnels du patrimoine africain et leurs partenaires locaux, nationaux, régionaux et internationaux, vers la poursuite et la multiplication d'actions concrètes en faveur de ce riche patrimoine

Projets situés: 10 ans d'expérience de terrain / 10 years of field experience

Ouvrage bilingue: français / anglaisCet ouvrage retrace la mise en œuvre du programme Africa 2009, initié par le Centre du patrimoine mondial de l'UNESCO, à travers des projets dits situés visant à améliorer les conditions de la conservation du patrimoine immobilier dans la région de l'Afrique subsaharienne tout en se positionnant dans le cadre plus large du développement durable. Cette publication illustre le dynamisme d'un réseau de professionnels aux capacités renforcées et se veut également être un instrument incitatif pour les professionnels du patrimoine africain et leurs partenaires locaux, nationaux, régionaux et internationaux, vers la poursuite et la multiplication d'actions concrètes en faveur de ce riche patrimoine

Managing Phenol Contents in Crop Plants by Phytochemical Farming and Breeding—Visions and Constraints

Two main fields of interest form the background of actual demand for optimized levels of phenolic compounds in crop plants. These are human health and plant resistance to pathogens and to biotic and abiotic stress factors. A survey of agricultural technologies influencing the biosynthesis and accumulation of phenolic compounds in crop plants is presented, including observations on the effects of light, temperature, mineral nutrition, water management, grafting, elevated atmospheric CO2, growth and differentiation of the plant and application of elicitors, stimulating agents and plant activators. The underlying mechanisms are discussed with respect to carbohydrate availability, trade-offs to competing demands as well as to regulatory elements. Outlines are given for genetic engineering and plant breeding. Constraints and possible physiological feedbacks are considered for successful and sustainable application of agricultural techniques with respect to management of plant phenol profiles and concentrations

African Linguistics in Central and Eastern Europe, and in the Nordic Countries

Non peer reviewe

Multi-messenger observations of a binary neutron star merger

On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of ~1.7 s with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg2 at a luminosity distance of 40+8-8 Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 Mo. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at ~40 Mpc) less than 11 hours after the merger by the One- Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over ~10 days. Following early non-detections, X-ray and radio emission were discovered at the transient’s position ~9 and ~16 days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. These observations support the hypothesis that GW170817 was produced by the merger of two neutron stars in NGC4993 followed by a short gamma-ray burst (GRB 170817A) and a kilonova/macronova powered by the radioactive decay of r-process nuclei synthesized in the ejecta

OPTICAL RADIO-CHROMIC PROPERTIES OF POLYANILINE FILM IRRADIATED WITH GAMMA RADIATION

Aniline hydrochloride monomer has been polymerized to polyaniline salt (emeraldine salt) and the characterization reveal that it is an electro-chromic material after direct -radiation exposure to high dose up to 50 kGy. The electro-chromic material which deduced by direct step wise appearance of light green color to dark green color following the radiation doses rather than colorless. The Radio-chromic and polymerization confirmed by using UV-visible spectroscopy, which gave rise to absorbance band at 790 nm, the absorbance band in turn increased following the dose exponentially. The band gap energy of PANI was obtained and showed to be decreases by increase of radiation dose down to 1 eV at 50 kGy. Raman spectroscopy showed a new bond C=N as a part of polaron conducting species is created by irradiation, which has Raman shift of 1637 cm-1. The double bond at C=N which is responsible for the appearance of the green color has been increases exponentially following the radiation dose

Appraisal of the potential of the growth of e-retailer based on impact of perceived value on trust for online purchases

Customer satisfaction for online purchase and its subsequent influence on customer trust is a pivotal in the proliferation of online businesses that in turn can foster global and national economic growth. The significance of understanding perceived value in the context of online shopping is as important as is in the context of traditional shopping. Quantitative data were collected from customers, who have online shopping experience. The analysis, carried out using structural equation modeling, suggests that customers' perceived acquisition value has a significant impact over their satisfaction which affects their trust with regard to an online retailer