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2023 ◽  
Vol 83 ◽  
Author(s):  
A. G. Oliveira ◽  
M. H. M. Silva ◽  
J. Garlet

Abstract Bamboo (Bambusa sp.) is a grass species with high potential for exploitation, however, this raw material is easily attacked by xylophagous agents such as Coleoptera. The objective of this study is thus to analyse the presence of wood-boring beetles associated with Bambusa sp. in Alta Floresta, Mato Grosso, Brazil. The study was carried out in a bamboo plantation, from August 2016 to July 2017. Two models of ethanolic traps were used, PET Santa Maria and ESALQ-84. Three families of wood-boring beetles were observed in this study: Bostrichidae, Cerambycidae and Curculionidae. 2,144 individuals were identified, belonging to 19 species, in four subfamilies and 11 tribes, and the species Xyleborus affinis was the most frequently collected. Thus, this study constitutes an important contribution to the knowledge of coleoborers associated with bamboo plantations, with the registration of the occurrence of species, as well as contributing to the knowledge of the entomofauna associated with species cultivated in the Southern Amazon.


2022 ◽  
Vol 374 ◽  
pp. 131766
Author(s):  
Carolina Pascual-Silva ◽  
Ailén Alemán ◽  
M. Pilar Montero ◽  
M. Carmen Gómez-Guillén
Keyword(s):  

Author(s):  
Anuphak Saosaovaphak ◽  
Chukiat Chaiboonsri ◽  
Satawat O. Wannapan

Based on real situations that mankind is confronting with the difficult era; insufficiency in food supplies, natural disasters, epidemic, etc. The paper is to econometrically compute portfolio optimization and predict efficiency frontiers for solving the most sensible scenario to suggest a sustainable policy in the three important pillars such as the growth of economic systems, environmental management, and public healthcare. The main observations are annual time-series information between 2000 and 2017 and collected from three countries in ASEAN. Singapore, Thailand, and Malaysia are the target. Methodologically, this research is to apply the quantum mechanism and the wave function for clarifying a real data distribution; true mean, and standard deviation of the data. These outcomes are the initial raw material for the modern portfolio optimization (for short-run policies) and efficient frontier computation (for long-term policies). Empirically, the results show some exclusive issues that can be the help for managing feasible budget allocations fairly and sustainably.


2022 ◽  
Vol 22 (1) ◽  
pp. 147-160
Author(s):  
Cristiane do Bom Conselho Sales Alvarenga ◽  
Rosemary do Bom Conselho Sales ◽  
Rodrigo Barreto Caldas ◽  
Paulo Roberto Cetlin ◽  
Maria Teresa Paulino Aguilar

Abstract Metakaolinis the principal raw material utilized in the synthesis of geopolymers, although its ratio of silica and alumina contents is not ideal. Normally, the SiO2 content is adjusted with the use of silicates present in the activating solution. An eco-efficient alternative would be the use of glass waste as an additional source of silica.This work evaluates the efficiency of the alkaline activation of metakaolin, using potassium hydroxide and silicate, with and without the substitution of 12.5% of metakaolin by microparticles of glass. The efficiency of the alkaline activation was evaluated by X ray diffractometry, spectroscopy in the infrared region with the Fourier transform, nuclear magnetic resonance spectroscopy of 27Al and 29Si, specific mass and compressive strength. The results indicate the occurrence of geopolymerization with and without the use of glass waste. It was observed that the substitution of 12.5% favors the mechanical performance of the compounds at 28 days, with increases by 37% and 47% in the mechanical strength of the material with thermal curing and ambient temperature curing, respectively.


Based on real situations that mankind is confronting with the difficult era; insufficiency in food supplies, natural disasters, epidemic, etc. The paper is to econometrically compute portfolio optimization and predict efficiency frontiers for solving the most sensible scenario to suggest a sustainable policy in the three important pillars such as the growth of economic systems, environmental management, and public healthcare. The main observations are annual time-series information between 2000 and 2017 and collected from three countries in ASEAN. Singapore, Thailand, and Malaysia are the target. Methodologically, this research is to apply the quantum mechanism and the wave function for clarifying a real data distribution; true mean, and standard deviation of the data. These outcomes are the initial raw material for the modern portfolio optimization (for short-run policies) and efficient frontier computation (for long-term policies). Empirically, the results show some exclusive issues that can be the help for managing feasible budget allocations fairly and sustainably.


2022 ◽  
Vol 29 ◽  
pp. 100347
Author(s):  
Eiki Suga ◽  
Natsuki Ichinose ◽  
Kazuhiro Tsukada ◽  
Seiji Kadowaki ◽  
Sate Massadeh ◽  
...  

2022 ◽  
pp. 37-58
Author(s):  
Raquel Piqué ◽  
Marian Berihuete-Azorín ◽  
Anna Franch ◽  
Patrick Gassmann ◽  
Josep Girbal ◽  
...  

Fuel ◽  
2022 ◽  
Vol 309 ◽  
pp. 122173
Author(s):  
Zhichen Zhang ◽  
Enqiang Yu ◽  
Yanjun Liu ◽  
Fushan Wen ◽  
Nan Shi ◽  
...  

Author(s):  
Suthatip Sinyoung ◽  
Suwimol Asavapisit ◽  
Kittipong Kunchariyakun

2022 ◽  
Vol 7 (4) ◽  
pp. 70-78
Author(s):  
E. V. Malysheva

The article analyzes the peculiarities of export activities of small and medium-sized businesses, shows the high involvement of companies belonging to small and medium-sized businesses (SMEs) in the high-tech sector. The contribution of SMEs to the creation of the value of a product/service through the introduction of innovations and their adaptation to different contexts by providing new or niche products that meet the diverse needs of customers is noted. Based on the analysis of the world practice of export activities of SMEs, the author concludes that SMEs can contribute to economic diversification and economic sustainability. This is especially true for resource-rich countries that are particularly sensitive to fluctuations in raw material prices. The emphasis is placed on the analysis of the export activity of Russian SMEs, an insignificant share of SMEs in the total volume of exports in comparison with other countries is highlighted. It is concluded that Russian small and medium-sized businesses are in the process of formation, which makes them vulnerable to the influence of both external and internal threats. It is shown what impact the COVID-19 pandemic had on SMEs. It was emphasized that the main problems for such companies were non-fulfillment of contractual obligations and a sharp decline in demand.


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