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MEETINGS AND CONGRESSES (7 journals)

Showing 1 - 8 of 8 Journals sorted by number of followers
Discourse Studies     Hybrid Journal   (Followers: 35)
Language and Intercultural Communication     Hybrid Journal   (Followers: 23)
Advances in Image and Video Processing     Open Access   (Followers: 23)
International Journal of Media and Cultural Politics     Hybrid Journal   (Followers: 10)
Bulletin du centre d’études médiévales d’Auxerre     Open Access   (Followers: 5)
Buddhist-Christian Studies     Full-text available via subscription   (Followers: 4)
Brookings Trade Forum     Full-text available via subscription   (Followers: 4)
Argumentation and Advocacy     Hybrid Journal   (Followers: 1)
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Advances in Image and Video Processing
Number of Followers: 23  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2054-7412
Published by Society for Science and Education Homepage  [4 journals]
  • New Paradigm: Coal Fly Ash as the Main Cause of Stratospheric Ozone
           Depletion

    • Authors: Mark Whiteside; J. Marvin Herndon
      Abstract: We provide further compelling evidence that aerosolized coal fly ash and its various components, especially iron, is the primary cause of stratospheric ozone depletion, not chlorofluorocarbon (CFC) gases, as “decreed” by the Montreal Protocol of 1989. Aerosolized coal fly ash is a toxic “witches’ brew” of numerous elements and substances that destroy ozone directly and indirectly by numerous chemical reactions, the full extent of which is not yet known. The prevailing CFC-ozone depletion theory is simply wrong, and does not account for multiple chemical and photochemical reactions that kill stratospheric ozone. We discuss the primary role of coal fly ash particles in ice nucleation and cloud formation in the upper troposphere and stratosphere, and dispel the notion that meteoric or extra-terrestrial material is responsible for polar stratospheric clouds. We provide extensive documentation that iron and several other elements found in coal fly ash are trapped in polar stratospheric clouds and destroy ozone by various means, especially when they are released in the spring. Recent scientific discoveries “fit together” to strongly support the New Paradigm of stratospheric ozone depletion by coal fly ash. The “World Not Avoided” by the Montreal Protocol is already here: The biosphere is in collapse with runaway global warming, and lethal ultraviolet radiation penetrating to Earth’s surface. This new paradigm shift must be operationalized. Time is critically short to salvage what we can of Earth’s vital life support systems, including the stratospheric ozone layer. We reiterate that all sources of aerosolized coal fly ash must be reduced and/or eliminated. All forms of geoengineering must stop immediately if we are to survive as a species. The deliberate assault on Earth’s natural processes, we allege, constitutes no less than acts of planetary treason.
      PubDate: Wed, 28 Sep 2022 00:00:00 +000
       
  • Evaluation of Bay Leaf and Onion Peel Ethanolic Extracts for the
           Management of Kola Weevils (Balanogastris kolae) (Coleoptera:
           Curculionidae) in Stored Cola Nitida

    • Authors: O. Ibitoye; A. O. Ogundare, T. M. Ayangbemi, K. M. Ogungbemi, O. S. Oyewole, O. O. Abel
      Abstract: Farmers subject cured kolanuts to chemical treatment for control of kola weevils, kola nuts do not undergo any other additional form of post harvest processing before storage and consumption, therefore, there is an urgent need to develop new post harvest storage pest control strategies that are safe, of low cost, convenient to use, and environmentally / user friendly. The objective of the study is to assess the efficacy of Bay leaf and Onion peel ethanolic extracts on Balanogastris kolae against the chemical control measures. Efficacy of ethanolic extracts of Bay leaf and Onion Peels at concentrations of 20, 40, 60, 80 and 100 %v/v, each as protectant in the control of the Kola weevil Balanogastris kolae, were compared with a conventional insecticide, Cypermethrin at a rate of 5 ml / 100g Kolanut. Parameters evaluated include adult mortality, rate of adult emergence and nut damage which were subjected to analysis of variance and means between treatments were separated using LSD. Mortality of Balanogastris kolae increased with increasing concentration of the extracts as well as days of exposure, All the treatments were better than the control (P < 0.05) in reducing the number of emerged adult B. kolae and grain damage. All treatments proved superior to control (58.0%) with Cypermethrin and 90 %v/v Onion peel outstanding.
      PubDate: Mon, 26 Sep 2022 00:00:00 +000
       
  • Has Humanity Reached the Stationary Phase of its Growth Curve'

    • Authors: Michael Gurevitz
      Abstract: .
      PubDate: Mon, 26 Sep 2022 00:00:00 +000
       
  • Effects of Anthropogenic Activities on the Water Quality of River
           Nyakomisaro, Kisii, Kenya

    • Authors: George Mokua Ogendi
      Abstract: Access to safe drinking water is a major challenge to urban populations in developing countries. Most of the Kisii town residents draw raw water from rivers and springs for domestic use which is highly contaminated with coliforms. No water quality assessments in these rivers have been conducted. An assessment was therefore conducted on water quality of River Nyakomisaro-Riana flowing through Kisii town, during May 2013 to October 2014. The overall objective was to to assess the spatial and temporal variation of selected physical, chemical and biological parameters of river Nyakomisaro-Riana.  Five sampling sites equidistant from one another were selected to establish a sampling transect for this river. Standard methods described in APHA, 1998 were used to determine levels of physico-chemical parameters, nutrient concentrations and biological characteristics. This study was conducted on this river for the first time and forms a basis for comparison with future studies. Spatial and temporal patterns of the parameters were analyzed and presented in tabular and graphical formats using Excel and Sigma Plot software. Descriptive statistics were done.  Analysis of variance and Tukey’s pairwise comparisons were used to establish whether there were significant differences in studied parameters. Results indicated that the concentrations of total dissolved solids, Total supsennded soilds, Electrical conductivity, temperature, total suspended solids increased downstream while dissolved oxygen concentration and pH decreased. The increasing trend of the physico-chemical parameters downstream was attributed to observable anthropogenic inputs via raw sewage disposal into this rivers, car wash sites, garbage dumpsites close to riverbanks and surface run-off from the town catchment. Inflow of pollutants into the river was made worse by unplanned settlements along the riverbank with lots waste disposal facilities, car-wash bays and garages along it. This study recommends that oversight organizations like NEMA, GWASCO, Ministry of Environment and other related organizations take necessary action to improve the water quality of this river.  
      PubDate: Mon, 26 Sep 2022 00:00:00 +000
       
  • Strategic Management of Societal Practices on the Environment for Peaceful
           and Harmonious Development of a Nation: The Role of Unions and
           Professional Associations. Would Evil Regimes Affect Such a Society'

    • Authors: Francis Kwadade-Cudjoe
      Abstract: Unions and professional associations within organizations must cooperate and work assiduously for organizations to execute operations smoothly to achieve their mandates. Teams comprising union, professional association and managers of the organization should work together peacefully; a sine qua non for organizations to succeed and achieve corporate goals. Societal norms and cultures within the environment, especially where the multi-national companies operate should be monitored for peace and harmony to exist. Governments that are evil should not be allowed to dictate how the foreign company’s policy should be, regarding the entrepreneur’s new environment. Apart from the organization given employment to the citizenry in the new environment, the entrepreneur also stands to gain some profits from his/her endeavours, so it is a win-win situation. The environment should be well maintained, especially with the introduction of green technology - deep leaning and artificial intelligence – as technological panacea; this would hopefully ward off climate change, greenhouse emissions of gases and carbon footprint, for the sustenance of the environment for future generation to live and work healthily.
      PubDate: Mon, 26 Sep 2022 00:00:00 +000
       
  • A Logistic Curve in the SIR Model and Its Application to Deaths by
           COVID-19 in Japan

    • Authors: Takesi Saito; Kazuyasu Shigemoto
      Abstract: Approximate solutions of SIR equations are given, based on a logistic growth curve in the Biology. These solutions are applied to fix the basic reproduction number α and the removed ratio c, especially from data of accumulated number of deaths in Japan COVID-19. We then discuss the end of the epidemic. These logistic curve results are compared with the exact results of the SIR model.
      PubDate: Sat, 24 Sep 2022 00:00:00 +000
       
  • A Review of Green Public Procurement in the EU

    • Authors: Dimitris Karnabos; Roido Mitoula, Alexandra Tragaki, Constantinos Apostolopoulos
      Abstract: Public authorities are major consumers in Europe. Each year they spend approximately 2 trillion euros, equivalent to some 19% of the EU’s Gross Domestic Product on the purchase of goods, such as office equipment, building components and transport vehicles; services, such as buildings maintenance, transport services, cleaning and catering services and works. By promoting and using "Green Public Procurement (GPP)" public authorities can drive the market to greener products and services, achieving an important reduction of the environmental impacts. Within the EU public procurement is subject to a number of sources of Community law. In addition, there are common criteria for the adoption of Green Public Procurement in specific sectors (i.e. copying and graphic paper, office IT equipment, cleaning products and services, transport, construction, etc.) and a number of sources of interpretation of the relevant laws and principles (i.e. the "Buying Green handbook"). On the review of GPP the work team firstly analyzed the EU strategic policy, and then chose a series of examples to evaluate the implementation of GPP, illustrate how public authorities have made greener purchasing a reality and provide guidance to others. The evaluation included some of the most interesting case studies related to different countries (i.e. Netherlands, Denmark, Sweden, Malta, Austria, Belgium, Spain, Switzerland, Slovenia, Bulgaria, Latvia, France, UK, Germany, Greece, Finland, etc.) and collected by European Commission over the years. According to the results of the evaluation the benefits associated with GPP are not limited only to environmental impact, but can include everything from social and health to economic and political benefits. Today even if the concept of GPP has been widely recognised as a useful tool, it remains a voluntary instrument. Member States should be encouraged to draw up Action Plans for greening their public procurement. Among other, the coming years should be a growing political commitment at national, EU and international level.
      PubDate: Thu, 22 Sep 2022 00:00:00 +000
       
  • Identification of Geometrical Parameters of an Operational Railway Route
           Determined by the Curvature of the Track Axis

    • Authors: Wladyslaw KOC
      Abstract: The paper presents a detailed procedure for determining the curvature of the track axis with the use of the moving chord method, with a view to practical application of this method to identify the geometric parameters of the operational railway track. The method of determining the coordinates of the end of the virtual chord brought forward and backward, and then determining the curvature occurring at a given measurement point, has been explained. The presented course of action is based on the use of the given calculation formulas and is of a sequential nature; there is no need to use numerical methods. As part of the curvature calculation procedure, it is also possible to determine the values of the directional angle of the route. The verification of the application possibilities of the moving chord method was carried out in the presented calculation example, on the basis of the determined Cartesian coordinates of the axis of the railway track in use. The obtained curvature plots, which clearly differ from the plots for model layouts as they have a less regular, oscillating character, which results from the track deformation and measurement error. However, this did not prevent them from making it possible to estimate the basic geometrical parameters of the measured layout. The implementation of the presented procedure should significantly improve the process of identifying the geometric layouts of the track in the horizontal plane.
      PubDate: Thu, 22 Sep 2022 00:00:00 +000
       
  • Nutritional Status and Early Food Diversification in Infants Aged 200 Days
           in Three Municipalities of Abidjan

    • Authors: ABO K. JEROME MOUROUFIE; Firmin Kouassi Kouakou; Séraphin Kati-Coulibaly ; Ngolo David COULIBALY, Hortense FAYE-KETTE
      Abstract: It appears from this study that certain socio-demographic parameters influence the nutritional status of infants. The early introduction of foods greatly affects the nutritional status of children. For each manifestation of malnutrition, the prevalence is high among infants living in low socioeconomic households to infants in well-to-do households. This study shows that the majority of mothers are aged from 20 to 29 and 34% are pupils or students. Among them, 50% live in households with a high standard of living. Despite advice and recommendations on the practice of exclusive breastfeeding, 60% of infants started early food diversification between 0-119 days. The Height-for-Age (H/A) study indicates that among infants 21.6% have at-risk nutritional status, while 6.4% are stunted. The present study also indicates at the Weight/Height (W/T) level that among infants 26.9% have a nutritional status at risk and 3.3% are wasted. Regarding the weight-for-age (W/A) parameter, it appears that the proportion of children with a nutritional status at risk is 33.3% and 10.7% underweight.  All infants who received early complementary foods are at risk of malnutrition.
      PubDate: Sat, 17 Sep 2022 00:00:00 +000
       
  • Use of Rice Husk Ash for Copper, Chromium, Zinc, and Lead Bioremediation
           in Crude Oil-Contaminated Soil

    • Authors: Reward Kokah Douglas; Ayebatin Fou, Peremelade Perez Araka
      Abstract: In this study, 1kg soil sample was artificially contaminated with 250ml crude oil and incubated for 4-day; and heavy metals-copper (Cu), chromium (Cr), zinc (Zn), and lead (Pb) concentrations were measured by flame atomic adsorption spectrometry (AAS) to be 11.68mg/kg, 38.96mg/kg, 59.34mg/kg, and 28.56mg/kg, respectively. Fresh rice hush ash (RHA = 0.5kg) was prepared from rice husk (RH) and used for the bioremediation of these metals in a 2-month experiment. The RHA reduced the Cu, Cr, Zn, and Pb concentrations by 33%, 29%, 27%, and 25%, respectively. Considering the quantity of RHA to the contaminated soil mass ratio (0.5:1.0), and the short period of the experiment (i.e., 2-month), RHA amendment is promising for the bioremediation of heavy metals polluted soils. This study provides the first reference point on the effectiveness of RHA for the remediation of heavy metals in polluted soils in the Niger Delta,Nigeria. Thus, we recommend field-trials and longer-term study to better assess the long-term applicability of this option for bioremediation of  polluted soils.
      PubDate: Sat, 17 Sep 2022 00:00:00 +000
       
  • EQUILIBRIUM AND KINETIC STUDIES FOR THE REMOVAL OF Zn(II) AND Cr(VI) IONS
           FROM AQUEOUS SOLUTION USING PINEAPPLE PEELS AS AN ADSORBENT

    • Authors: Rasaq Olowu; Dr Bunmi, Tohib, Tessy, dr Kamil, Dr Wale, Dr Kemi
      Abstract: Adsorption is one of the methods extensively reported to have been successfully used for the removal of potentially toxic metals (PTMs)  from wastewater. In this study, the equilibrium and kinetics studies of the application of pineapple peels as an adsorbent for the removal of Zn(II) and Cr(VI) ions from aqueous solutions was investigated in a batch process.  The initial and equilibrium metal ion concentrations of the solutions were determined by Atomic Absorption Spectroscopy. The characterization of the adsorbent was done using the Scanning Electron Microscope and Fourier Transform Infrared Spectroscopy (FTIR). The FTIRspectra confirmed that there are different functional groups in adsorbents, which are able to react with metal ions in aqueous solution. Effects of initial pH, initial metal ions concentrations, shakingtime and solid/liquid ratio on metal ions biosorption were also investigated. Adsorption of metal ions were pH dependent and the results indicate that the optimum pH for the removal of Zn (II) and Cr (IV) was found to be 6.0and the maximum percentage removal of Zn (II) and Cr (IV)at this pH were 86.45% and 92.56% respectively along the whole range of initial concentrations.Three adsorption isotherm models, Langmuir, Freundlich and Temkin were used to simulate the equilibrium data. The experimental data were best fitted to the Langmuir isotherm when compared with other models with the highest R2 values of 0.937 and 0.987 for Zn(II) and Cr(VI) ions respectively. The achieved results confirmed that the adsorption of zinc and chromium were in good compliance with pseudo-first-order reaction kinetic suggesting that the adsorption is apparently physisorption and the thermodynamics analysis of the result showed that the process is spontaneous and exothermic.The pineapple peels investigated in this study showed good potential for the removal of zinc and chromium from aqueous solutions
      PubDate: Sat, 17 Sep 2022 00:00:00 +000
       
  • A Proposal and Simulation with NS3 of a New offloading Algorithm between
           LTE/LTE-Advanced and Wi-Fi

    • Authors: DEUSSOM DJOMADJI Eric Michel ; Eric Michel DEUSSOM DJOMADJI, Emmanuel TONYE
      Abstract: The field of mobile telecommunications is an integral part of our society. In the wake of IT, it is implemented and used in all areas of society. This deep anchoring, which mobile networks use today, poses significant problems for operators in terms of speed, capacity demands and customer satisfaction, particularly for the quality of services, but also in terms of profitability and cost of services investments. Reports from Ericsson and Cisco which are representative bases for calculating world total data traffic in cellular mobile networks predict that the number of devices connected to IP networks will be more than three times the global population by 2023. There will be 3.6 networked devices per capita by 2023, up from 2.4 networked devices per capita in 2018. There will be 29.3 billion networked devices by 2023, up from 18.4 billion in 2018. To answer these challenges, two choices are offered to the operators the evolution of the standards or the interconnection of several networks. In this order of idea, we carried out an 4G/4G+ -Wi-Fi offloading simulation algorithm. It was up to us to design an offloading algorithm and then to simulate through a dedicated environment in a scenario allowing to implement it. To achieve this, it was first necessary for us to understand the concept of mobile data offload, to know the types of mobile data offload and to choose one on which the present work will be based. Later we carried out an analysis of the existing data offload algorithms to be able to bring out the limits. From these limits we have designed and proposed a new traffic offloading algorithm with a different approach compared to the existing one studied in the literature. After all this, we have developed and simulated a scenario comprising a 3GPP network in this case the 4G + network, a non 3GPP network in this case the WiFi network, and we have implemented our algorithm via NS3 network simulation software. With this work, we have proposed a solution to overcome an investment deemed expensive to deploy 5G in Africa.
      PubDate: Sat, 17 Sep 2022 00:00:00 +000
       
  • Artificial Intelligence (A.I) Application in Foreign Language Teaching and
           Learning

    • Authors: Pham Thanh Nga
      Abstract: In this article, the author will analyze specifically the problem of using artificial intelligence (AI) technology in teaching Foreign Language at the higher education. From there, the author will propose some solutions to further improve the effectiveness of using AI technology in teaching and learning English in particular and foreign languages ​​in general in Vietnam in the next period.
      PubDate: Sat, 17 Sep 2022 00:00:00 +000
       
  • Comparative Study on Frying Performance of Three Different Oils for the
           Preparation of Ripe Plantain Banana

    • Authors: N. P. G. Pambou-tobi; Arnaud W. G. Tamba Sompila, Rosalie Kama Niamayoua, Michel Linder
      Abstract: In this study, the effect of traditional frying on oils degradation namely frial oil (FO), soybean oil (SBO) and refined blanded deodorized palm olein oil (RBDPOo) was investigated. Oils degradation was monitored by measuring the free fatty acids (FFA), peroxides (PV), p-anisidine (p-AV),) iodine value (IV), totox value (TxV), total polar compounds (TPC), fatty acid composition and C18:2/C16:0 ratio, viscosity, conjugated dienes (CD) value and oil color. Oils samples were taken every 4 h of frying during 10 consecutive days. Values of all physic-chemicals measures significantly changed with frying and type of fat. Values of FFA, p-AV, TPC, CD, TxV, ΔE and viscosity increased significantly, whereas IV and C18:2/C16:0 ratio decreased significantly at the end of the frying processes. Excepted PV, where the values reached a maximum and then decreased at to final frying. These results suggested that a traditional frying process has an impact on degradation on edible oils.
      PubDate: Sat, 17 Sep 2022 00:00:00 +000
       
  • Shear Modulus and Yield Stress Change with Pressure and Temperature

    • Authors: Yehuda Partom
      Abstract: It is well known that the shear modulus (G) and the yield stress (Y) of metals increase with pressure (P) and decrease with temperature (T). Steinberg [1], in his popular compendium of dynamic material properties, assumes for Y/Y0(P,T)=G/G0(P,T) linear relations based on tests at ambient conditions. But recent tests of high-pressure dynamic loading of certain metals yielded results that generally deviate from Steinberg’s equations. Here we use a different approach to estimate G/G0(P,T). As a first approximation we let G/G0 follow from the assumption of constant Poisson ratio (n). This leads to G/G0=K/K0, where K is the isentropic bulk modulus. With this assumption we compute the longitudinal sound speed of tantalum along its principal Hugoniot curve, and compare the result to recent measurements. There is a slight disagreement which we correct by assuming (second approximation) that Poisson’s ratio decreases slightly with pressure, and increases slightly with temperature. As K is always available in a hydrocode run from the equation of state, so are therefore also G/G0 and Y/Y0.
      PubDate: Sat, 17 Sep 2022 00:00:00 +000
       
  • Antibacterial Activity of Verticillin D Produced by Endophyte Clonostachys
           Rosea EC 28

    • Authors: Sagou Dominique ; Pakora Gilles Alex, Dodehe Yeo, N'Guessan Jean David
      Abstract: The objective of this work was to determine the antibacterial effect of endophytic fungi of Ceiba pentandra and to identify the compound(s) responsible for this activity. The antibacterial screening of the mycelium of endophytic fungi isolated from the bark of C. pentadra was evaluated against multiresistant strains E. coli and S. aureus. This screening led to the selection of isolate EC 28 for its ability to effectively inhibit the growth of the bacterial strains tested. Analysis of morphological characters and ITS rDNA sequences identified EC 28 as Clonostachys rosea. EC 28 was cultivated and extract. From the crude extract, two compounds, ergosterol and verticillin D, were isolated and identified. The in vitro activity of each compound against the growth of five strains bacterial multiresistant were assessed. Ergosterol did not have any activity. Verticillin D was active on all strains of bacterial multiresistant E. coli 942, E. coli 4814, S. aureus 931, S. aureus 934, and K. pneumonia 815 with respective MICs of 18.75; 18.75; 18.75; 3 and 37.5 µg/ ml.
      PubDate: Sat, 10 Sep 2022 00:00:00 +000
       
  • Calorific Value of Rubberwood Biomass Along the Tree

    • Authors: Gladys Ama Quartey; John Frank Eshun, Eric Donkor Marfo
      Abstract: Rubberwood is one of the major plantation crops grown mainly in the Western Region of Ghana. They are mostly utilised for their latex. Rubber trees that are aged and low yielding can be cut down and properly utilised as fuelwood. In Ghana, there is a high demand for fuelwood in most domestic homes and rubberwood is one of the tree species with potential use as fuelwood. Even though gas has been promoted as an energy source for heating and cooking activities in Ghana, it remains expensive, and its affordability, therefore, remains out of reach of many people. Rubberwood, which is plantation grown can, therefore, be considered as fuelwood. In this study, the calorific values of rubberwood biomass from a plantation were determined using samples from the bottom, middle, branch, and top parts of the stem. The calorific values of rubber wood biomass from different sections of the tree were determined in accordance with standard laboratory methods using a bomb calorimeter. The calorific values obtained were 17.194 MJ/kg for the branch, 17.225 MJ/kg for the top, 17.595 MJ/kg for the middle, and 17.702 MJ/kg for the bottom. The trend of the values shows that the calorific value decreases from the bottom through the top of the stem to the branch. The calorific value of rubberwood was comparable to other high-performing tree species used for fuelwoods and therefore has the potential to be used for fuelwood.
      PubDate: Sat, 10 Sep 2022 00:00:00 +000
       
 
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