The present study aims to apply new biotechnology for the extraction of the low-grade concentration of actinides elements by biosorption techniques from Abu Rusheid mylonite rocks. Therefore, Cystoseira osmundacea, Chondrus Crispus, and Palmaria elegant algae were used for this purpose. The biosorption capacity of thorium was close to about (81.66%, 80%, and 77.7%) in Cystoseira osmundacea, Chondrus Crispus, and Palmaria elegans respectively. On the other side, the uranium (U) absorption was not as high as thorium (Th). Holmium is completely absorbed by Chondrus Crispus and Palmaria elegans while europium has vanished by Cystoseira osmundacea. Finally, Cystoseira osmundacea is the best choice for the biosorption of thorium and europium from Abu Rusheid mylonite rocks.

KEYWORDS: Uranium, Thorium, REEs elements, Cystoseira osmundacea, Chondrus Crispus, and Palmaria elegans.

An educational conversational agent (CA) is a dialog system that can interact with students automatically. Educational CAs are inevitably becoming popular considering their purpose of serving students. Groups of designers are developing different conversational interfaces to help students and educators retrieve information and make decisions. Our preliminary work aims to demonstrate that students' personalities impact the design of educational CAs. Weput the participants into different groups according to their personality dimensions. We designed a prototype of educational CA and investigated the task accuraciesof different personalities.......

KEYWORDS: Artificial intelligence, Conversational agent, chatbot, education, personality, user-centered design, prototype.

The concentration of greenhouse gases have increased continuously, especially CO2 gas. It might cause increase the atmosphere temperature, climate change extremely. By effort of reducing CO2 concentration to maintain the level concentration of CO2 in atmosphere is necessary to avoid the global warming. There are many ways to reduce of CO2from the atmosphere namely, naturally and human efforts. Photosynthesis used CO2 and water to make up of tissue building block of plantation. Ocean water and land are also absorbed CO2 from atmosphere, naturally. Biochar has a high carbon content and recalcitrance can be used as soil amendment, biochar has a mean residence time in the soil on the order of hundred or thousand years. Using adsorbents to absorb CO2 from industrial released and atmosphere are reduced the concentration of CO2. Metal-organic framework (MOF) is best candidate to adsorb CO2 from atmosphere.

KEYWORDS: adsorbent, CO2, concentration, remove.

Large scale production of liquefied natural gas (LNG) typically employs energy-intensive cascade refrigeration cycles such as the Propane Precooled Mixed Refrigerant (C3-MR)cycle. Previous work has focused on improving the energy efficiency of this cascade-type cycle since it can bring significant economic benefits. However, potential benefits associated with changes in the configuration of the mixed refrigerant loop of the C3-MR cycle are usually neglected. This work investigatestwoC3-MR cycle options, based on structural modifications of the MR loop, to see how competitivea modified process will be with abase case process. The chosen configurations are the base case C3-MR cycle with two MR compressors and the modified case cycle with a single compressor. The performance of these two cycles is evaluated using a case study of an LNG plant in Algeria. The analysis uses a proprietary steady state simulator for modelling. It can be found that the specific power of 831.6 kWh/ton LNG and the coefficient of performance (COP) of 1.33 are achieved in base case and the specific power of 981.3 kWh/ton LNG and the COP of 1.28 are achieved in modified ......

KEYWORDS: LNG, Baseload LNG Plant, Natural Gas Liquefaction, Technical evaluation.

Half-cell potential measurements are quick, low-cost, and virtually non-destructive techniques to assess the corrosion risk of steel reinforcement in concrete. This study presents a practical application of CORMAP II half-cell potential measurements on existing reinforced concrete (RCC) blocks of the drainage gallery of the power station. The blocks show no signs of deterioration on the concrete surface. Temperature, reference electrode type, and pre-wetting period are some variables that affect the measured values of the half-cell potential. On the equipotential contour map, however, the negative potential area is related to localized corrosion. The numerical criteria disagree with the corrosion condition of steels. Therefore, even if there are no visible indicators of corrosion-related deterioration on the concrete surface, the equipotential contour map is a more reliable technique for detecting localized corrosion than the numerical criterion.