This paper presents an investigation of carbon utilizing efficiency of different algal strain during the CO2 sequestration. Micro –algal strains are used in our study for its vast renewable products, lipid and carbohydrate content and for its effective sequestering behavior. Two species of micro algal strains Chlorella vulgaris, and Scenedesmus quadricauda were collected to study their biochemical parameters under different growth conditions, cultivated in waste water (RO reject water plus textile industry waste water) for a period of 22 days with a CFTRI nutrient medium in a thermostatically controlled room at 24± 1ºC and it is illuminated with cool white fluorescent lamps at an intensity of 2000 lux in a 12:12 light and dark regime. The Experiments were conducted to study the growth rate of micro algae at different concentrations of NaHCO3 and it was compared with control. The growth conditions reveal that Bicarbonate additions enhanced the biomass and biochemical compound of microalgae. 2g/L was optimum bicarbonate concentration. The dosage of 2 g L−1 of sodium bicarbonate has supported the growth of Chlorella vulgaris showing 9 fold higher cell growth rate than in control culture. This bicarbonate-supplementation has enhanced the biomass productivity as long as pH was controlled. This study revealed that the bicarbonate-based microalgae cultivation is certainly possible, it has eco-friendly feasible approach to establish CO2 mineralization technology and can also produce biofuel.

In assessing financial status, companies may fall into one of four areas: Financial Excellent, Financial Well-being , Financial Helplessness, or Financial Bankruptcy. Studies have shown that many companies are in the area of financial helplessness due to not applying specialized financial logic and using the guidance of experts and especially in critical situations such as inflation, recession, sanctions and so on. Therefore, the field of Financial Helplessness is considered as a sensitive bridge between two Financial Well-being fields and Financial Bankruptcy and puts a two-way choice in front of the company\'s decision-making managers. They can continue the current situation, and obviously the outcome will be a fall in the area of financial bankruptcy, Or they can use financial and engineering techniques to identify the company\'s strengths and weaknesses and gradually enter the good financial field with planning planning and executing accordingly. For this purpose, the researchers of this study have used Financial Ratios(FR) along with Data Envelopment Analysis(DEA) modeles in Tehran Stock Exchange companies as a case study.\nResearchers in this study, input-based BCC mathematical model of DEA has been used and the relative efficiency of 470 companies accepted in Tehran Stock Exchange in 2015 to 2018 which were classified in nine heterogeneous groups were calculated and then the companies were ranked based on the efficiency; efficient and inefficient companies were specified. Moreover, the analysis and forecasts were performed to areas of Financial Helplessness and bankruptcy based on industry average obtained from each group concerning the future financial situation of companies where the group of construction materials with industry average of 0.89 was at the highest rank and the group of investment companies with industry average of 0.67 was at the lowest rank among these nine groups.

The main objective of augmented reality (AR) technology is to superimpose computer-generated information directly into a user’s sensory perception, rather than replacing it with a completely synthetic environment. \nThe findings presented in this paper are the outcome of an ongoing research project called the Virtual Interactive Teaching Environment (VITE). This system was designed to enable the educator to use more sophisticated techniques and as a result to help the students to learn more effectively through the use of Virtual Multimedia, it’s a new learning style of education. The contribution of this current interactive system takes into consideration both technological and educational issues.\nAs well this paper is a combination of a review of the papers related to applications of virtual reality and augmented reality with special attention to using the respective approaches in the case of autistic spectrum disorders (ASDs) and of a description of the studies of the authors dealing with the corresponding problem. The major emphasis is put on the elements that contribute to the amelioration of communicative and emotional skills in such children, mainly related to modeled applications, computers, and an output interface (projection). This study, therefore, focuses on the understanding of the elements simplifying the development of these new information and communication technologies. In order to answer our queries, we used exploratory interviews and specific reviews, such as virtual or augmented reality environments used to provide children with ASD a database containing varied and multimodal information for various purposes: a display of the 3D environment and its constituent objects, understanding of the task, an increase in the salience of certain objects, issuance of instructions associated with interaction with the environment in order to increase the capacity of an individual to process and use received information to allow a better performance of the activities of daily living (ADL).

The Previous researches of Ouargla region sand dunes focused on the diagnostic side and study of its crystalline state. These researches showed that the sand dunes of Ouargla region in its natural state (Ref) consist of quartz and gypsum, and when it heated at different temperatures (600,1200°C) appear other elements such as (Anhydrite, Wollastonite and Cristobalit) [1,2].In our research we will focus on other aspect of the study, which is the measurement of sand dune physical properties.\nThe aim of this work focused on the measurement of the real and imaginary parts of electrical impedance , in sand dunes of Ouargla region in different temperatures (natural state, 600 and 1200 °C), at a range frequencies intervals between 0,01 Hz and 1,355 Hz with AC voltage 1.000 V , using the impedance spectroscopy.\nThe impedance spectroscopy is a powerful proven method of analysis in research and development of materials [3]. This technique is based on the modeling results by equivalent electrical circuits which have the same frequency response as the sample [4].\nThe experimental results revealed that the real and imaginary parts of electrical impedance have strong frequency and temperatures dependence. \nIn the frequency range between (0,01 - 0,6914) Hz at natural state the real part of electrical impedance takes a negative values, however, at remaining frequencies the real part values are positive. But at 600°C in frequencies range between (0,01-0,0239 and 0,968-1,355) Hz and in frequencies between (0,04685-0,6914) Hz. At 1200°C the real part of electrical impedance value is maximized in 0,01 Hz. \nThe imaginary part of electrical impedance values are positive at certain frequencies and temperature and negative at others, such as in 0,01 Hz at room temperature and 600°C but at 1200°C . \nThe nature of impedance electric variation indicated a possibility to know the polarization of Ouargla region sand dunes and acquaintance the when the material is passive devices (consumes power) or active devices (produces power). It is also possible to know the quality of equivalent electrical circuit, whether to know if it’s induction or capacitance.