Subjects -> COMMUNICATIONS (Total: 518 journals)
    - COMMUNICATIONS (446 journals)
    - DIGITAL AND WIRELESS COMMUNICATION (31 journals)
    - HUMAN COMMUNICATION (19 journals)
    - MEETINGS AND CONGRESSES (7 journals)
    - RADIO, TELEVISION AND CABLE (15 journals)

MEETINGS AND CONGRESSES (7 journals)

Showing 1 - 8 of 8 Journals sorted by number of followers
Discourse Studies     Hybrid Journal   (Followers: 38)
Advances in Image and Video Processing     Open Access   (Followers: 24)
Language and Intercultural Communication     Hybrid Journal   (Followers: 23)
International Journal of Media and Cultural Politics     Hybrid Journal   (Followers: 11)
Bulletin du centre d’études médiévales d’Auxerre     Open Access   (Followers: 6)
Buddhist-Christian Studies     Full-text available via subscription   (Followers: 5)
Brookings Trade Forum     Full-text available via subscription   (Followers: 4)
Argumentation and Advocacy     Hybrid Journal   (Followers: 2)
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Advances in Image and Video Processing
Number of Followers: 24  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2054-7412
Published by Society for Science and Education Homepage  [4 journals]
  • Mt. Åreskutan Nunatak: An Arboreal “Roadmap” to the Paleobiogeograpy
           of the Swedish Scandes and a Possible Pointer Towards a Future Revival of
           a Richer and More Biodiverse Mountainscape

    • Authors: Leif Kullman; Lisa Öberg
      Abstract: In the context of proposed future anthropogenic climate warming, the present study accounts for arboreal responses to recent temperature rise, viewed in the perspective of Lateglacial and early Holocene climate and ecosystem variability. As an analogue to a future warmer world, the focus is on an early deglaciated nunatak in the southern Swedish Scandes, Mt. Åreskutan, with a well-researched arboreal history, embracing periods of climate warming of present-day extent. New research from this and adjacent localities challenges traditional historical narratives, which fail to provide a true picture of deglaciation and vegetation history. It is increasingly evident that common boreal tree species grew close to this summit in a climate, 2-3 °C warmer than at present, during the Lateglacial and early Holocene periods 16 800- 6000 years ago. Based on minimal temperature requirements for tree growth, future warming of the same magnitude would be sufficient for trees to reclaim their lost ground close to this peak. Recent observations of tree saplings and the emergence of genuine “forest plants” at these high elevations, indicate that dispersal mechanisms will not constrain this progressive process. Conceivably, it will not manifest as advancement of a broad forest front. History suggests that pockets of trees, with a ground cover of boreal plant species, will establish in local favourable niches, e. g. sites of vanished glaciers and perennial snow beds. Much of the present-day alpine tundra may be more conservative and resilient to tree invasion, as evident from insignificant upslope movement of forest limits in response to modern climate warming. By and large, continued warming is no imminent threat to alpine biodiversity. An open and diverse high-mountain landscape is likely to prevail.
      PubDate: Sat, 10 Feb 2024 00:00:00 +000
       
  • Giant Platelets as Potential Biomarker for Autism Spectrum Disorder

    • Authors: Aya Sanyour; Safiah Alhazmi
      Abstract: Introduction: Platelet hyperserotonemia has been repeatedly observed in individuals with autism spectrum disorder (ASD). Ras p21 protein activator 3 (RASA3) is essential in forming and differentiating blood cells, especially platelets. Therefore, this study aims to evaluate the expression of RASA3 and examine the platelet morphology in addition measuring the plateletcrit and platelet count in all samples. Methods: RNA was extracted from 12 autistic children and four control samples then qPCR was used to determine the expression of RASA3. Platelet morphology was examined under light microscope. In addition, Complete blood count (CBC) test with automated haematology analysers was done for all children to determine the platelet count and the plateletcrit (PCT). Results: The qPCR result showed differential expression patterns of RASA3 between autistic and normal samples. The platelet morphology revealed large and giant platelets in all autistic samples and the plateletcrit percentage was increased in 10 out of 12 ASD samples. Conclusions: There is a correlation between dysregulated RASA3 and the large and giant platelets in ASD cases which could explain the platelet hyperserotonemia in this disorder and could be used as an early biomarker for ASD diagnosis or may be used for early interventions.
      PubDate: Sat, 10 Feb 2024 00:00:00 +000
       
  • Historical Irony: The Israeli State Is Mostly Endangered by Its Religious
           Sector

    • Authors: Michael Gurevitz
      Abstract: The Jewish people (Israelites) suffered thousands of years from invasions and destructions of their Canaan homeland (e.g., Assyria in 721 BC; Babylon in 597 BC; Rome in 63 BC), pogroms during exile (e.g., mostly in the 19th century in Eastern Europe, and even nowadays by the Palestinian terror organization Hamas), and attempts of extermination (e.g., holocaust during World War II; attack by the Arabic states upon the re-establishment of Israel in 1948), but miraculously they survived against all odds.
      PubDate: Sat, 10 Feb 2024 00:00:00 +000
       
  • Comparative Attenuating Potentials of Pleurotus ostreatus, Non-ionic and
           Phyto-emulsified Surfactants on Crude oil Impacted Soil and the
           Hepatotoxicity of Leaf Aqueous Extract of Telfaria occidentalis Harvested
           from the Attenuated Soil on Wistar Rats

    • Authors: K. T. Nwauche, Berezi, E. P; Ugoh, A. I.
      Abstract: This study investigated and compared the hepatotoxicity of aqueous leaf extract of T. occidentalis from crude oil impacted soil and impacted soil amended with Pleurotus ostreatus, non-ionic and phyto-emulsified surfactants. Crude oil highly impacted soil excavated from an oil spill site at Obeche community in Ogba/Egbema/Ndoni Local Government Area of Rivers State, Nigeria was used. Remediation was induced using white rot fungus (Pleurotus ostreatus), phyto-emulsified surfactant (Costus afer stem) and chemical surfactant (Triton x-100) for 60 days after which fresh seeds of T. occidentalis were planted on the soil and allowed to germinate and grow for 6 weeks. Twenty one (21) adult wistar rats weighing between 170-200g were used. They were randomly sorted into seven groups (A-G) of three rats each. After one week of acclimatization, the animals were administered the aqueous leaf extract of T.occidentalis harvested from the soil samples. Liver marker assays and histopathological evaluations were done using standard laboratory methods on the sampled wistar rats. Results from this research revealed a significant difference (p≤ 0.05) in the ALP level when group F (151.33 ± 12.05) is compared with group A (92.66 ± 3.05). Only groups D (74.00 ± 74.48) and G (88.67 ± 3.21) decreased when compared with group A (92.66 ± 3.05). For the AST levels of wistar rats fed with T.occidentalis harvested from cells A to G, only groups B and G are significantly different (p≤ 0.05) when compared with group A. All the amended cells except cell E (41.67 ± 3.78) are observed to be decreased when compared with group A (35.00 ± 4.58). Only groups E, F and G are significantly different (p≤ 0.05) when compared with group A in the ALT levels. Groups B and G are observed to be significantly decreased with values of 18.00 ± 2.64 and 15.67 ± 2.08 respectively when compared with group A (23.00 ± 4.58). Histopathological evaluation of the liver of the wistar rats revealed the presence of congested sinusoid, congested vessels, intraparenchymal inflammation and congested central veins for groups A, C, D and E respectively with mild periportal and intraparenchymal inflammation in groups F and G respectively. Findings from this study revealed that the T.occidentalis leaves harvested from the polluted and amended soil samples caused varying degrees of hepatotoxicity to the rats with only those harvested from group G (Costus afer + Triton x-100) showing no presence of acute hepatotoxicity. The finding therefore indicates that a combined formulation of non-ionic and Costus afer phyto-emulsified surfactants could be a possible remediation pathway in the bioremediation technology.
      PubDate: Sat, 10 Feb 2024 00:00:00 +000
       
  • Effect of Climate Variability on Crop Yield in Nigeria (1980-2020)

    • Authors: O. Ideki, Nwaerema, P; Abali, T. P.
      Abstract: This study examined the effect of climate variability on crop yield from 1980-2020 in Nigeria. Rainfall and temperature data were obtained from the Community Climate System Model website. In contrast, the crop yield of five cereal crops namely cassava, maize, sweet potatoes, yam, and plantain were obtained from the African Center for Statistics of the United Nations Economic Commission for Africa (UNECA) Addis Ababa for the same period. The data sets were analyzed using descriptive and inferential statistics. The results of the analysis revealed that the mean values of rainfall and temperature are 1259.4237mm and 25oC respectively for the 41 years of the study. Furthermore, the regression analysis indicates an increasing trend for the two climate parameters. At the same time, cassava has the highest yield of 101,449.4390 hg/ha the highest followed by yam 920,75.2678hg/ha, plantain 622,92.3659 hg/ha, sweet potatoes 475,06.0488hg/ha and the crop with the least yield was maize 146,60.0488 hg/ha. However, the analysis of the effect of climate variability on crop yield revealed that sweet potatoes and maize correlated significantly with rainfall and temperature demonstrating the effect of climate variability on crop yield. This implies that both maize and sweet potatoes were the most sensitive to climate variability while cassava, plantain, and yam were the least sensitive crops. The study recommended mainstreaming the weather index crop insurance scheme into the Nigeria Agricultural Insurance Corporation (NAIC) to help and modulate the loss and production risk arising from extreme climate events. There is also a need to pay close attention to factors outside rainfall and temperature in explaining low and inconsistent yield in Nigeria. Also, farmers should take factors like soil fertility, untimely planting, improper selection of cropping systems, diseases, and pest infestation among others into consideration
      PubDate: Sat, 10 Feb 2024 00:00:00 +000
       
  • Analysis on Two Fake “Topology Diagram of Mineral Paragenesis
           Combination in Multi-Component Open Systems” Published by Jingwen Mao,
           Academician of The Chinese Academy of Engineering

    • Authors: Fa Han
      Abstract: The making principles and methods of "multi-component open system mineral Paragenesis combination topology diagram" are one of the most basic cutting-edge research topics in geoscience. So far, only a few professors among Chinese geologists can do this kind of work. Researcher Mao Jingwen of the Institute of Mineral Resources of the Chinese Academy of Geological Sciences published an academic paper and a doctoral thesis in 1986 and 1988 respectively, which contained two "topological diagrams of multi-component open system mineral Paragenesis combinations". We have proved through detailed research that the two diagrams produced by Mao Jingwen have the following series of fundamental errors: ①He doesn’t comply with the principle of mineral phase law (P≦C), ② He doesn’t comply with the Gibbs phase law (F=Ci+2-φ=0), ③ He doesn’t know how to determine the effective inert components and excess components (as shown in Figure 1 of the text, he replaced the effective inert components with excess components in the composition ⊿ diagram), ④ He doesn’t know how to determine the relationship between symbiotic minerals (For example, the four univariable reaction equations in Figure 2 of this article are wrong), ⑤He doesn’t know how to determine the stoichiometry of univariable reaction equations, ⑥It violates the principle of "mass conservation" before and after the univariate reaction. This fully shows that Mao Jingwen himself does not understand the principles and methods of drawing topological diagrams of mineral symbiosis combinations, that is, both diagrams are fake, and Mao Jingwen deliberately falsified them.
      PubDate: Sat, 10 Feb 2024 00:00:00 +000
       
  • Parkinson’s Disease and Food Expenditure in Italy: Stochastic and
           Non-Stochastic Analyses of Food Elements

    • Authors: Umberto Cornelli; Enzo Grossi, Martino Recchia, Claudia Antonelli, Luca Battaglia, Giorgia Bonalume, Roberto Butti, Camurri, Matteo, Carluccio, Beatrice, Clementi, Camilla, Condoleo, Federico, D’Ambrosio, Alessio, De Lucia, Veronica, Giardinetti, Rebecca, Gusperti, Greta, Idonia, Marco, Idonia, Luca, Iftime, Maria Daniela, Malnati, Sofia, Mandelli, Kevin, Masini, Chiara, Messina, Beatrice, Nebbia, Stefano, Piarulli, Gabriele, Piccinini, Daniele, Pelucchi, Francesca, Radici, Alessandro, Rattaggi, Matteo, Testa, Mattia, Volpi, Viviana, Zahra, Meerab
      Abstract: Background: The correlation between food and Parkinson's disease (PD) shows that the Mediterranean diet (MeD) brings positive benefits. Objective: To find the correlation between PD and food components in the various regions of Italy in 2016. Methods: The protein, fat, mineral and vitamin content of 275 foods belonging to 56 distinct food categories were correlated with PD in terms of standardised mortality ratio (SMR). Data were computed for 19,500 families in 540 Italian municipalities for 2016. Life expectancy, demographic data and level of well-being were also analysed. Stochastic and non-stochastic analyses (neural network mapping) were used to compute the associations with PD. Results: The following results were obtained by focusing on the food components deemed significant in both stochastic and non-stochastic analyses: Alcohol, saturated and monounsaturated fats, calcium and sodium were found to be causative or partially causative factors. Soluble sugars, carbohydrates, starch, selenium and vitamin D were seen to be protective or partially protective. The SMR of PD was significantly lower in Southern Italy than in the North due to a lower consumption of causative foods and higher consumption of protective ones. Furthermore, the lower gross domestic product (GDP) in the South may also have a significant effect. Conclusions: In 2016, the PD death rate in Southern Italy was significantly lower than in the North. The food component pattern that emerged in Southern regions was also significantly different: a lower consumption of causative food components and higher consumption of protective ones together with a lower GDP and life expectancy. Using data on food expenditure and quantities enable us to track the correlation with PD SMR on an annual basis.
      PubDate: Thu, 01 Feb 2024 00:00:00 +000
       
  • Mössbauer Spectroscopy Investigation of Thulium Oxide-Hematite
           Magnetic Ceramic Nanoparticles

    • Authors: Elena Stipetich; Sarah Glasser, Monica Sorescu
      Abstract: Magnetic ceramic nanoparticles system xTm2O3-(1-x)a-Fe2O3 (x=0.1and 0.5) was synthesized by mechanochemical activation starting from hematite and thulium oxide precursors and characterized by transmission Mӧssbauer spectroscopy.  The Mӧssbauer spectra were typically analyzed considering 1-3 sextets, corresponding to hematite (with and without thulium doping) and a doublet, representing thulium iron perovskite (thulium orthoferrite).  The magnetic hyperfine fields (BHF) and doublet abundance were studied as function of the ball milling time (BMT) for both molar concentrations employed.  The results are consistent with the formation of solid solutions in the investigated system.  The mixed-oxide nanoparticle system synthesized may have important applications in displays, sensors and photovoltaics, and is paving the way for emerging utilizations related to mechanically flexible electronics.
      PubDate: Thu, 01 Feb 2024 00:00:00 +000
       
  • Equivalence of Information and Effect

    • Authors: Friedhelm M. Jöge
      Abstract: A formula is developed that shows the Equivalence of Information and Effect and at the same time after transforming the Equivalence of Information flow and Energy.
      PubDate: Thu, 01 Feb 2024 00:00:00 +000
       
  • Flexible and Wearable Volatile Organic Compounds (VOCs) Sensing:
           Development and Future Perspectives

    • Authors: Houcheng Ren
      Abstract: Wearable gas sensors based on flexible design can be coupled to the vicinity of biological or environmental interfaces for detecting of volatile organic compounds (VOCs), with greatly simplified sample collection, storage, and analysis process. The flexible devices expand the detection form of sensors and provide continuous and real-time insights for gas detections. Based on wearable exhalation detection system, such as smart facemasks, in-situ and dynamic detection of various VOCs during diet and exercise regulation has been achieved. Thus, the wearable detection provides a unique perspective for biological metabolic activities and important technical support for personalized health detection and disease diagnosis such as pathogens from aerosol. This article introduces the development and application of the flexible wearable in-situ gas sensing technology and provides a detail outlook of the future perspectives in this field.
      PubDate: Thu, 01 Feb 2024 00:00:00 +000
       
  • The Fate of Energy Arising from Renewable Sources

    • Authors: Jovan Mitrovic
      Abstract: Using the wind energy as example, this notice sheds some more light on the effects of conversion of natural energy on the Earth's climate. This energy is mostly converted into electric energy that may strongly affect the climate. Its final mode is heat that is disposed as waste in the environment.
      PubDate: Mon, 22 Jan 2024 00:00:00 +000
       
  • Can Science Reveal the Origin of the Universe'

    • Authors: Weicheng Cui
      Abstract: Recently Nature published an influential paper and introduced a novel perspective: "Quantum theory might make the cosmos more certain than classical physics ever did." [1]. After reading this paper together with the relevant background theory, we think that this conclusion is drawn from continuous misconceptions since relativity theory, quantum mechanics and Big-Bang theory. These misconceptions include: (1) no distinction between Universe and world, thus blurred the boundary between speculative knowledge and scientific knowledge; (2) physical reality and mathematical language; (3) deterministic classical mechanics and probabilistic quantum mechanics; (4) completeness and logical consistency. In this short paper, six issues we found from reading this paper are briefly discussed and our main conclusions are that science cannot reveal the origin of whole Universe but a concrete system within the world we can observe. Scientific theory should not be required to be complete in order to keep its logical consistency. We should not interpret a scientific theory to be either deterministic or probabilistic and this depends on the information available to us for the model parameters. The clarification of these issues may be helpful to promote the development of cosmology theory in the track of scientific theory.
      PubDate: Mon, 22 Jan 2024 00:00:00 +000
       
  • Origin of Optical Activity in Cubic NaClO3 and NaBrO3 Crystals at 296K

    • Authors: Markku Lennart Karppinen
      Abstract: The optical activity is theoretically determined both in the dextro- and levorotatory crystals of NaClO3 and NaBrO3. Both compounds have identical structures and they crystallize in the space group P213 as ionic solids from the water solution at room temperature. The net charges of Cl, Br and O atoms in the XO3‒ ions are variables, when the ratios of the electric moments of second rank in the two principal axis directions and the ratios of the defined isomorphic and measured refractive indices of the two crystals are iterated to a topological equivalence. The difference of the net charges of Cl- and Br-atoms brings the opposite sense of optical rotation in these compounds. The rotation is computed from the principal axis components of the second electric moments and axial vectors derived from the point charge model. The unit cells have four XO3‒ ions of three-fold symmetries lying on the four diagonals. The components of the dominant axial vectors of two ions, standing in the right- and left-handed symmetries, are pointing towards each other in the principal axis directions and contribute to the optical rotation. The left-handed component against the propagation direction of the plane-polarized light changes its handedness and rotation character making the compounds optically active. Optical activity is observed in all three principal axis directions. NaBrO3 is dextro- and NaClO3 levorotatory in the right-handed coordinate axis system. The compounds have opposite senses of optical rotation when crystallizing in the left-handed coordinate axis system, but the they are not enantiomorphs, because the space group is not chiral.
      PubDate: Mon, 22 Jan 2024 00:00:00 +000
       
  • Effects of Biophotonic Treatment on Hematologic and Metabolic Parameters

    • Authors: Orien L. Tulp; Syed A. A. Rizvi, George P. Einstein
      Abstract: The wide-ranging effects of healthful vs. damaging consequences of UV irradiation on key physiologic parameters are reviewed in this paper. The effects are dependent on the wavelengths encountered, the absolute intensity and duration of the exposure, the tissues exposed, and whether the UV effects were delivered via in vivo or as an extracorporeal exposure in vitro typically performed with freshly obtained heparinized aliquots of whole blood. While damaging effects of high UV intensity may include irreversible irradiation damage to key cellular and molecular components, controlled low dosages of UV irradiation delivered via a conventional biophotonic apparatus at specific, controlled wavelengths can deliver beneficial effects on blood oxygenation, tissue repair, immune responses, glycemic responses, and glycated hemoglobin (HbA1c) concentrations. HbA1c is an important diagnostic marker for the effectiveness of diabetes management. Studies reviewed demonstrate increases in blood oxygenation and corresponding decreases in HbA1c concentrations following nominal biophotonic treatment and indicate that the application of this therapy extends beyond its more commonly applied applications in the treatment and control of infectious illnesses and anti-aging biophotonic therapeutics.
      PubDate: Mon, 22 Jan 2024 00:00:00 +000
       
  • Gamma Ray Energy Absorption Buildup Factor Computation for Human Tissues
           in Energy Range of Medical Radionuclides Up to 10 Mean Free Paths

    • Authors: Dariush Sardari; Bashir Bashiri, Mehrnaz Zehtabvar, Shahnaz Hashemi, Leila Anvariazar
      Abstract: Gamma ray energy absorption buildup factors (EABF) have been meticulously computed for a comprehensive set of 16 human tissues, encompassing breast, lung, kidney, pancreas, liver, eye lens, thyroid, brain, ovary, heart, large intestine, blood, skin, spleen, muscle, and cortical bone. These calculations encompass photon energies inherent to prevalent radionuclides, spanning from 0.021 to 1.25 MeV, while delving into penetration depths reaching up to 10 mean free paths (mfp), all accomplished via the utilization of MCNPX2.6. The outcomes underscore the pivotal role of chemical composition of tissue in determining EABF, shedding light on the substantial influence this factor wields. Particularly noteworthy is the observation that cortical bone distinctly exhibits significantly lower EABF values compared to the other tissues under investigation. Leveraging the EABF values furnished in this study offers a powerful means of regulating dose levels for both therapeutic and diagnostic applications, contributing to the precise administration of radiation-based medical interventions.
      PubDate: Thu, 18 Jan 2024 00:00:00 +000
       
  • Post-pandemic Socioeconomic Recovery: A Framework of Integrated Recovery
           Strategies for Severely Affected Economies

    • Authors: Paul O. Adekola; Helena Nogueira, Daniela Rodrigues
      Abstract: COVID-19 might have come and gone but the effects, which are likely to linger for at least a decade, are still here with us. Life must continue which was why most countries looked for post-pandemic recovery strategies. Many countries, especially those which were severely affected, called for high power workshops, seminars and conferences involving government officials, captains of industries, academia and think tanks just to devise strategies to prevent economic paralysis leading to presentation of many recommendations. In a corroborative fashion, the aim of this article was to examine the socio-economic effects of COVID-19 on severely affected economies and to recommend ways those economies can emerge from the effects. We relied on scoping review of relevant documents on COVID-19 in major search engines especially MEDLINE, PubMed, Scopus and others to look for solutions for severely affected economies. The stages involved in selection, inclusion and systematic review of the retrieved documents were guided by the PRISMA guidelines for systematic reviews. After a series of inclusion and exclusion criteria, 31 articles finally met our expectations and were included in the study. We determined severely affected economies as those which depended mainly on tourism (e.g. Moldova, Seychelles, etc.), the top ten countries with the highest casualties (e.g. USA, UK, India, Brazil, Italy, etc.) and the top ten with the highest number of clinically confirmed cases (e.g. USA, UK, Brazil, etc.). Other criteria include those countries which slipped into depression (e.g. USA, Nigeria, etc.) and those with economic fragility prior the outbreak of COVID-19 (most sub-Saharan Africa countries). Having reviewed the articles, we came up with eight integrated recovery strategies for the economic revival of those severely affected economies, such as: collective intelligence and entrepreneurial resilience, prioritizing e-commerce and digital trading, and re-strategizing tourism and transport. It is believed that if aggressively pursued, severely affected economies will emerge stronger after feeling the heat of COVID-19.
      PubDate: Thu, 18 Jan 2024 00:00:00 +000
       
  • Quantum Gravity, Energy Wave Spheres, and the Proton Radius

    • Authors: Darrell Bender
      Abstract: We argue, from present considerations and a previous analysis of the hydrogen atom as a miniature Michelson-Morley experiment in the Material Point Universe Revisited, that the electron wave velocity in the hydrogen atom is and that the fine-structure constant is the ratio of the remaining mass of the electron to the initial electron mass, not the ratio of velocities, as Sommerfield had it.
      PubDate: Thu, 18 Jan 2024 00:00:00 +000
       
  • Growth and Yield Responses of Okra (Abelmoscus Esculentus) Grown on Soil
           Amended with Dewatered Domestic Sewage Sludge in the West of Cameroon

    • Authors: Justine Mireille Fotsa Tiwa; Martin Lekeufack, Marcelle Léonce Tsimi Edzigui, Diane Fowoung, Amandine Elodie Manekeu Tanetsa, Adrienne Chimi Djiomou, Théophile Fonkou
      Abstract: Sewage sludge can be good to remedy soil depletion problems by intensive cropping and overcome fertilization costs in agriculture. This study aimed to assess the influence of domestic sewage sludge on the growth and yield of Abelmoschus esculentus in West of Cameroon. Sewage sludge from the digester of sewage treatment plant in University of Dschang was dewatered on filter beds and ground in a mill. It was applied to fields at rates of 10 t/ha (T1), 20 t/ha (T2) and 30 t/ha (T3) to evaluate their effects on the growth and yield of okra (KIRIKOU F1 variety). The experimental design was completely randomized bloc with three replicates. Growth parameters including plant height, leaf number and leaf area and yield parameters including flower buds number, flower number, total fruit number, mature fruit number, fruit diameter and weight were evaluated with time. Growth parameters were collected from the fourth week after sowing at biweekly frequency, while yield parameters were measured weekly from first flower buds formation until end of experiment. The highest plant height, leaf number and leaf area were obtained on the T2 field. Yields in T1, T2 and T3 fields were statistically similar with positive control T4 (0.25 t/ha of 12-14-19 NPK) but differed significantly with the negative control T0 (no fertilizer) which was similar with positive control. The best yield (0.588 t/ha) was achieved from fields fertilized with T2. These results show that sewage sludge, a by-product of domestic sewage treatment, can be used as fertilizer for okra production.
      PubDate: Thu, 11 Jan 2024 00:00:00 +000
       
  • Riemann Solver for Hyperbolic Equations with Discontinuous Coefficients: A
           Mathematical Proof of the Constant State Formula

    • Authors: Lakhdar Remaki
      Abstract: In Godunov numerical methods type used in many industrial and scientific numerical simulations including; fluid dynamics, electromagnetic, electro-hydrodynamic problems, a Riemann problem needs to be solved to estimate fluxes. The exact solution is generally not possible to obtain, but good approximations are available,  Roe and HLLC Riemann solvers are among the most popular. However, all these solvers assume that the acoustic waves speeds are continuous by considering some averaging. In a previous work the effect of such averaging is demonstrated to be significant for some applications leading to a wrong solution. A Riemann solvers is proposed taking into account the discontinuity of the acoustic waves speeds. The case that shows discrepancy comparing to the averaged  solvers is the one with an acoustic waves speeds having a negative left value and a positive right value. In this case a constant state appears and a formula of the constant state is proposed. A numerical, and a particular exact solution based on a regularization technique are provided to demonstrate the validity of the formula. However, and due to the important impact of this case on   Godunov type schemes, a mathematical proof is necessary. In this paper the formula of the constant state is proved, the proof is based on the generalized functions algebra theory .
      PubDate: Sun, 07 Jan 2024 00:00:00 +000
       
  • Proximate and Phytochemical Profile of Aqueous Extracts from Seeds and
           Pulps of Artocarpus. Heterophyllus

    • Authors: Habiganuchi, A; Monago-Ighorodje, C, Olua, V, Amadi, S. C, Ibiama, B. G, Habiganuchi, O, Ajie, B. I.
      Abstract: The Proximate and phytochemical potentials of the seeds and pulp of Artocarpus heterophyllus were evaluated to unravel reasons behind their wild usages locally for treatment of several diseases. The phytochemical and proximate compositions of the seed and pulp were determined using standard laboratory methods. The result shows that in pulp, flavonoids (98.11ppm), were the highest phytochemicals present, followed by alkaloids (24.86ppm), and Tannin (22.59). This shows that the pulp contains more phytochemicals (234.19ppm) than the seeds (160.25). The proximate profile gave maximum carbohydrate (%) for seed and pulp respectively as 52.68 and 56.6, followed by protein (%) as 24.13 and 18.85 for seed and pulp. This research work shows that it is clear that both the seed and pulp of A.heterophyllus have essential potential ingredients that could be used in management of several diseases, fungal and bacterial infections. The assayed proximate profile showed high Carbohydrate, protein and fibre content. Making this samples good carbohydrate, protein and fibre sources.
      PubDate: Sun, 07 Jan 2024 00:00:00 +000
       
  • Milankovitch Cycles, New Insights

    • Authors: Gordana Jovanović
      Abstract: Milutin Milankovitch published his influential research “Canon of Insolation and the Ice-age Problem” in Belgrade, Serbia, in 1941. His work is still significant in terms of studying climate changes. In this paper we also consider new scientific knowledge about solar insolation. Periodic solar activities such as sunspots and the magnetic field cycles or grand solar minimum/maximum affect the Earth’s atmosphere. These periodic natural factors, together with Milankovitch cycles, are important for regional and for global climate.
      PubDate: Sun, 07 Jan 2024 00:00:00 +000
       
 
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  Subjects -> COMMUNICATIONS (Total: 518 journals)
    - COMMUNICATIONS (446 journals)
    - DIGITAL AND WIRELESS COMMUNICATION (31 journals)
    - HUMAN COMMUNICATION (19 journals)
    - MEETINGS AND CONGRESSES (7 journals)
    - RADIO, TELEVISION AND CABLE (15 journals)

MEETINGS AND CONGRESSES (7 journals)

Showing 1 - 8 of 8 Journals sorted by number of followers
Discourse Studies     Hybrid Journal   (Followers: 38)
Advances in Image and Video Processing     Open Access   (Followers: 24)
Language and Intercultural Communication     Hybrid Journal   (Followers: 23)
International Journal of Media and Cultural Politics     Hybrid Journal   (Followers: 11)
Bulletin du centre d’études médiévales d’Auxerre     Open Access   (Followers: 6)
Buddhist-Christian Studies     Full-text available via subscription   (Followers: 5)
Brookings Trade Forum     Full-text available via subscription   (Followers: 4)
Argumentation and Advocacy     Hybrid Journal   (Followers: 2)
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