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  • Open Access

    ARTICLE

    Mobile Internet Mobile Agent System Dynamic Trust Model for Cloud Computing

    Weijin Jiang1, 2, 3, Yang Wang1,*, Yirong Jiang4,*, Yuhui Xu1, Jiahui Chen1, Lina Tan1, Guo Liang5

    CMC-Computers, Materials & Continua, Vol.62, No.1, pp. 123-136, 2020, DOI:10.32604/cmc.2020.05933

    Abstract In mobile cloud computing, trust is a very important parameter in mobile cloud computing security because data storage and data processing are performed remotely in the cloud. Aiming at the security and trust management of mobile agent system in mobile cloud computing environment, the Human Trust Mechanism (HTM) is used to study the subjective trust formation, trust propagation and trust evolution law, and the subjective trust dynamic management algorithm (MASTM) is proposed. Based on the interaction experience between the mobile agent and the execution host and the third-party recommendation information to collect the basic trust data, the public trust host… More >

  • Open Access

    Examination of a Biobased Carbon Nucleating Agent on Poly(lactic acid) Crystallization

    Michael R. Snowdon1,2, Amar K. Mohanty1,2, Manjusri Misra1,2*

    Journal of Renewable Materials, Vol.5, Suppl.1, pp. 94-105, 2017, DOI:10.7569/JRM.2017.634134

    Abstract This article assesses the performance of a biobased carbon as a nucleator using common techniques to stimulate poly(lactic acid) crystallization and enhance the thermal stability of PLA during injection molding. The combination of a biodegradable plasticizer, poly(ethylene glycol) (PEG), along with biobased carbon-rich pyrolyzed biomass char residue and an industrially available microcrystalline talc, were tested for nucleating agent capabilities at additions of 10 wt%. Differential scanning calorimetry (DSC) data demonstrated that the inclusion of the plasticizer could increase the PLA crystalline content with further improvements when nucleating agent was present. With a higher mold temperature, the PLA crystallinity surpassed 40%… More >

  • Open Access

    ARTICLE

    Bio-Based Hyperbranched Toughener From Tannic Acid and Its Enhanced Solvent-Free Epoxy Resin with High Performance

    Jie Xu1,3, Jiayao Yang1, Peng Lin2, Xiaohuan Liu1,*, Jinjie Zhang1, Shenyuan Fu1,*, Yuxun Tang2,*

    Journal of Renewable Materials, Vol.7, No.12, pp. 1333-1346, 2019, DOI:10.32604/jrm.2019.07905

    Abstract It is essential to design economic and efficient tougheners to prepare high-performance epoxy resin; however, this has remained a huge challenge. Herein, an eco-friendly, low-cost, and facile-fabricated bio-based hyperbranched toughener, carboxylic acid-functionalized tannic acid (CATA), was successfully prepared and applicated to the preparation of solvent-free epoxy resins. The mechanical performance, morphology, structural characterization, and thermal characterization of toughened epoxy resin system were studied. The toughened epoxy resin system with only 1.0wt% CATA reached the highest impact strength, 111% higher than the neat epoxy resin system. Notably, the tensile strength and elongation at break of toughened epoxy resin systems increased moderately… More >

  • Open Access

    ARTICLE

    Streptomyces PRIO41 as plant growth promoter of jalapeño pepper plants and as biocontrol agent of Fusarium

    Robles-Hernández L, J Hernández-Huerta, AC González-Franco, OA Hernández-Rodríguez, A Núñez-Barrios, R Pérez-Leal

    Phyton-International Journal of Experimental Botany, Vol.84, No.2, pp. 253-261, 2015, DOI:10.32604/phyton.2015.84.253

    Abstract Chili pepper is one of the main crops of economic importance in Mexico, and Fusarium wilting is a disease that limits its production. In addition, the inappropriate use of agrochemicals in farming activities generate environmental and health problems. Therefore, in this study the effectiveness of Streptomyces sp PRIO41 was evaluated as a (1) biocontrol agent of Fusarium spp and (2) plant growth promoter bacteria. Assays of pathogenicity and virulence of Fusarium spp. in jalapeño pepper seeds, and interactions of these pathogens with Streptomyces PRIO41 were evaluated under two nutritional conditions. In the greenhouse, the effectiveness of Streptomyces sp. PRIO41 was… More >

  • Open Access

    ARTICLE

    SHORT NOTE - Cylindrocladium spathiphylli, a causal agent of root and crown rot of Spathiphyllum wallisii in Buenos Aires, Argentina

    Grijalba PE, HE Palmucci

    Phyton-International Journal of Experimental Botany, Vol.76, pp. 79-84, 2007, DOI:10.32604/phyton.2007.76.079

    Abstract A new disease of Spathiphyllum wallisii plants, characterized by leaf yellowing and wilting due to root and crown rot, was observed in nurseries of the Great Buenos Aires, Argentina. A fungus was consistently isolated from diseased tissue and identified as Cylindrocladium spathiphylli, on the base of its morphological and cultural characteristics. Inoculation tests were carried out which confirmed this fungus as the causal agent of the disease. This is the first report of C. spathiphylli causing root and crown rot of S. wallisii in Buenos Aires. More >

  • Open Access

    ARTICLE

    In vitro antagonism of Trichoderma harzianum on Sclerotium cepivorum Berk. and S. rolfsii Sacc., causal agents of onion rot

    Zúñiga-Mendoza E, LF Ceja-Torres

    Phyton-International Journal of Experimental Botany, Vol.86, pp. 7-13, 2017, DOI:10.32604/phyton.2017.86.007

    Abstract In vitro tests were carried out, to evaluate the antagonist capacity of a strain of Trichoderma isolated from soil in La Cienega de Chapala, Michoacán, Mexico against Sclerotium cepivorum and Sclerotium rolfsii, casual agents of onion rot, an important disease in Mexico and the rest of the world. Percentages of radial growth inhibition (PRGI) were calculated every 24 h, until a rate of antagonism was obtained according to the Bell’s scale, as well as the percentages of inhibition of the production of sclerotia and their parasitism. The PRGI was 17.4% against S. rolfsii and 22.2% against S. cepivorum after 48… More >

  • Open Access

    ARTICLE

    Exploring Urban Population Forecasting and Spatial Distribution Modeling with Artificial Intelligence Technology

    Yan Zou1,2,3,*, Shaoliang Zhang1, Yanhai Min1

    CMES-Computer Modeling in Engineering & Sciences, Vol.119, No.2, pp. 295-310, 2019, DOI:10.32604/cmes.2019.03873

    Abstract The high precision population forecasting and spatial distribution modeling are very important for the theory and application of population sociology, city planning and Geo-Informatics. However, the two problems need to be solved for providing the high precision population information. One is how to improve the population forecasting precision of small area (e.g., street scale); another is how to improve the spatial resolution of urban population distribution model. To solve the two problems, some new methods are proposed in this contribution. (1) To improve the precision of small area population forecasting, a new method is developed based on the fade factor… More >

  • Open Access

    ARTICLE

    Reactive Compatibilization of Short-Fiber Reinforced Poly(lactic acid) Biocomposites

    Phornwalan Nanthananon1, Manus Seadan2, Sommai Pivsa-Art3, Hiroyuki Hamada4, Supakij Suttiruengwong1,*

    Journal of Renewable Materials, Vol.6, No.6, pp. 573-583, 2018, DOI:10.32604/JRM.2018.00129

    Abstract Poor interfacial adhesion between biobased thermoplastics and natural fibers is recognized as a major drawback for biocomposites. To be applicable for the large-scale production, a simple method to handle is of importance. This work presented poly(lactic acid) (PLA) reinforced with short-fiber and three reactive agents including anhydride and epoxide groups were selected as compatibilizers. Biocomposites were prepared by one-step melt-mixing methods. The influence of reactive agents on mechanical, dynamic mechanical properties and morphology of PLA biocomposites were investigated. Tensile strength and storage modulus of PLA biocomposites incorporated with epoxide-based reactive agent was increased 13.9% and 37.4% compared to non-compatibilized PLA… More >

  • Open Access

    ARTICLE

    Encapsulation of Bacterial Metabolic Infiltrates Isolated from Different Bacillus Strains in Chitosan Nanoparticles as Potential Green Chemistry-Based Biocontrol Agents against Radopholus similis

    Hilary Ureña-Saborío1*, Sergio Madrigal-Carballo1, Jorge Sandoval2, José R. Vega-Baudrit3, Alejandro Rodríguez-Morales2

    Journal of Renewable Materials, Vol.5, No.3-4, pp. 290-299, 2017, DOI:10.7569/JRM.2017.634119

    Abstract Currently there is a trend towards reducing the use of agrochemicals in developing countries. However, they are still being applied intensively in tropical countries. Thus, there is a trend towards developing new products based on natural chemicals for pest control, leading to second-generation pesticides incorporating nano- and biotechnologies. Costa Rica is one of the largest producers of bananas in the world. One of the most important pests of banana and plantain crops is the burrowing nematode, Radopholus similis (Cobb) Thorne. Highly toxic chemical compounds have traditionally been used to control this specific pest in banana plants, which can have dangerous… More >

  • Open Access

    ARTICLE

    Production of Starch Films Using Propolis Nanoparticles as Novel Bioplasticizer

    Karolina Villalobos1, Hider Rojas1, Rodolfo González-Paz2, Daniel Brenes Granados2, Jeimmy González-Masís2, José Vega Baudrit1,3, Yendry Regina Corrales-Ureña1*

    Journal of Renewable Materials, Vol.5, No.3-4, pp. 189-198, 2017, DOI:10.7569/JRM.2017.634109

    Abstract Because starch is a biodegradable polymer with low cost and wide availability it is an attractive material for producing edible films for fruits. Films produced with pure starch have the disadvantage of being fragile. To overcome this issue, propolis nanoparticles were used as a novel plasticizer. Mechanical, thermal and morphological properties of the films containing 0.5, 1 and 3 wt.% propolis nanoparticles were evaluated. The best performance was obtained using 0.5 wt.% propolis, increasing the Young’s modulus and decreasing the glass transition temperature (Tg), showing their plasticizing effect. The results of scanning electron microscopy (SEM) and atomic force microscopy (AFM)… More >

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