bluuebunny/crossref_metadata_2025 huggingface dataset:
Demand for Storage and Import of Natural Gas in China until 2060: Simulation with a Dynamic Model
Authors: Chen Zhihua , Wang Hui , Li Tongxia , Si Ieongcheng
Published: August 2021

China has been reforming its domestic natural gas market in recent years, while construction of storage systems is lagging behind. As natural gas accounts for an increasing proportion due to the goal of carbon neutrality, large-scale gas storage appears to be necessary to satisfy the needs for gas peak shaving and national strategic security. Additionally, the domestic gas production in China cannot meet consumption demands, and imports will play a significant role on the supply side. This paper developed a system dynamics (SD) model and applied it to simulate gas market behaviors and estimated China’s gas storage capabilities and import demands over the next 40 years. To achieve carbon neutrality, it is necessary for China to make great progress in its energy intensity and improve its energy structure, which have a great impact on natural gas consumption. Thus, alternative scenarios were defined to discuss the changes in the gas market with different gas storage goals and environmental constraints. The results show that under low and medium carbon price scenarios, natural gas demand will continue to grow in the next 40 years, but it will be difficult to achieve the goal of carbon neutrality. Under the high carbon price scenario, natural gas consumption will grow rapidly and reach a peak in approximately 2040, after which renewable energy will play a more important role to help achieve carbon neutrality. At the peak time, China’s gas storage demand will be 205.5 billion cubic meters (bcm) and import demand will reach 635.4 bcm, accounting for 72.8% of total consumption. We also identified the contradiction between the estimated storage capability, import demand and infrastructure planning. There will be a gap of 28.1–69.3 bcm between the planned storage capacity and simulated demand by 2030, while import facilities may partly strand assets. Finally, we provided some policy recommendations for constructing gas storage and import management and operation systems.
Calcium from Finger Millet—A Systematic Review and Meta-Analysis on Calcium Retention, Bone Resorption, and In Vitro Bioavailability
Authors: Anitha Seetha , Givens David , Botha Rosemary , Kane-Potaka Joanna , Sulaiman Nur , Tsusaka Takuji , Subramaniam Kowsalya , Rajendran Ananthan , Parasannanavar Devraj , Bhandari Raj
Published: August 2021

Calcium deficiency during child growth leads to osteoporosis in later stages of life. Finger millet is one of the calcium dense foods, with three times the level of calcium than milk, and the only cereal that contains high calcium content which is consistent across different varieties (364 ± 58 mg/100 g). Thus, finger millet has potential for addressing calcium deficiency naturally. This study aimed to determine the retention and impact of finger millet calcium on bone turnover through a systematic review and meta-analysis. Three human studies were eligible for systematic review. Of these, only two were eligible for meta-analysis to assess the retention of calcium in children of 9 to 12 years. One study on bone turnover markers was not used in the meta-analysis as at least two studies are required to conduct meta-analysis. Due to the lack of complete data only four studies were eligible for meta-analysis to assess the in vitro bioavailability of calcium from unprocessed and a range of different types of processed finger millet. The result shows that there was significant retention (p < 0.05) of 23.4 ± 2.9% calcium from finger-millet-based diet which could help bone accretion during child growth if finger-millet-based diet is consumed. The bone turnover marker study shows that the resorption of calcium reduced by 28% and 47% among peri and post-menopausal women respectively after feeding the nutria mixed grain ball. However, there is no significant change in bone formation marker. Depending on the type of processing, calcium bioavailability either increased or decreased. One in vitro study showed that calcium bioavailability from finger millet was 28.6% when boiled, whereas three studies on processing show that certain processing can double the calcium bioavailability to 61.4%. Irrespective of the type of processing, finger millets contribute to high calcium retention and extremely high bioavailable calcium and could be useful for healthy growth and in dealing with complications related to calcium deficiency.
Environmental Sustainability Post-COVID-19: Scrutinizing Popular Hypotheses from a Social Science Perspective
Authors: Lehmann Paul , Beck Silke , de Brito Mariana Madruga , Gawel Erik , Groß Matthias , Haase Annegret , Lepenies Robert , Otto Danny , Schiller Johannes , Strunz Sebastian , Thrän Daniela
Published: August 2021

There is an increasingly vocal debate on potential long-term changes in environmental sustainability spurred by the global COVID-19 pandemic. This article scrutinizes the social science basis of selected popular hypotheses regarding the nexus between the COVID-19 pandemic and the societal transitions towards environmental sustainability. It presents results that were derived through an interdisciplinary dialogue among social scientists. First, it is confirmed that the COVID-19 crisis has likely created a potential window of opportunity for societal change. Yet, to ensure that societal change is enduring and actually supporting the transition towards environmental sustainability, a clear and well-targeted political framework guiding private investments and behavior is required. Second, it is emphasized that there are important structural differences between the COVID-19 crisis and environmental crises, like time scales. Consequently, many strategies used to address the COVID-19 crisis are hardly suitable for long-term transitions towards environmental sustainability. Third, it is argued that transitions towards environmental sustainability—building both on reducing environmental degradation and building socio-techno-ecological resilience—may create co-benefits in terms of preventing and coping with potential future pandemics. However, research still needs to explore how big these synergies are (and whether trade-offs are also possible), and what type of governance framework they require to materialize.
Organic Corn Production Practices and Profitability in the Eastern U.S. Corn Belt
Authors: Brock Caroline , Jackson-Smith Douglas , Kumarappan Subbu , Culman Steve , Herms Cathy , Doohan Douglas
Published: August 2021

Efforts to assess and improve the sustainability performance of the growing organic farming sector depend on an accurate understanding of farm structure and management practices. To contribute to the dearth of literature in this area, we conducted a survey of over 850 certified organic corn growers in four states (Indiana, Michigan, Ohio, and Pennsylvania) in the spring of 2018. Findings show that most organic corn growers in this region had diversified livestock operations (mostly dairy) on relatively small farms (10–100 ha), which contrasts with trends of specialization and growth in farm size. More than half were dairy farmers, and nearly two-thirds farmed with horses (likely Amish). Soil fertility and health were managed by the use of manure, cover crops, forages, and a variety of other soil amendments. Organic corn growers relied heavily on moldboard plow tillage. All producers had positive net returns to labor and management in 2017, though net returns varied widely across operations. The results have implications for assessing the sustainability of organic farming systems, and for designing scientific research and extension/outreach programs to ensure they address the needs of the diverse organic farming population in this region.
COVID-19 and Its Effects on Attitudes toward Opportunity-Motivated Entrepreneurship: Before and after Lockdown
Authors: Seah Yuan Zhi
Published: August 2021

COVID-19 lockdown measures have largely been effective in curtailing the spread of the disease. Yet, its other effects have been profound and pervasive, exposing gender inequalities, reducing psychological sustainability, and causing economic hardship. Entrepreneurship, with its potential for effecting social good and sustainable economic development, has too been changed with studies finding a drop in entrepreneurship during the crisis. Yet, it is unknown how entrepreneurship may change after COVID-19 and lockdown measures are eased. We study changes in attitudes toward entrepreneurship by testing two samples of Singaporean undergraduates before the implementation (N = 242) and after the easing (N = 280) of lockdown measures. In doing so, we contribute to research about attitudes toward entrepreneurship, often side-lined in Theory of Planned Behaviour entrepreneurship studies which tend to focus instead on entrepreneurship intentions. Our findings indicate that opportunity-motivated, or pull, entrepreneurship may have become more positive after lockdown measures are eased. Next, women hold stronger beliefs in entrepreneurship’s capacity to fulfil agentic-type goals (e.g., power, achievement). For both genders, the extent to which entrepreneurship can achieve prosocial, communal-type goals is a key post-lockdown determinant of positive attitudes to entrepreneurship. Our findings provide clues into what to expect regarding post-lockdown entrepreneurship, and bears practical implications for entrepreneurship educators and policymakers.
Jacobi Multipliers in Integrability and the Inverse Problem of Mechanics
Authors: Cariñena José F. , Fernández-Núñez José
Published: August 2021

We review the general theory of the Jacobi last multipliers in geometric terms and then apply the theory to different problems in integrability and the inverse problem for one-dimensional mechanical systems. Within this unified framework, we derive the explicit form of a Lagrangian obtained by several authors for a given dynamical system in terms of known constants of the motion via a Jacobi multiplier for both autonomous and nonautonomous systems, and some examples are used to illustrate the general theory. Finally, some geometric results on Jacobi multipliers and their use in the study of Hojman symmetry are given.
A Class of Exponentiated Regression Model for Non Negative Censored Data with an Application to Antibody Response to Vaccine
Authors: Martínez-Flórez Guillermo , Vergara-Cardozo Sandra , Tovar-Falón Roger
Published: August 2021

In this paper, an asymmetric regression model for censored non-negative data based on the centred exponentiated log-skew-normal and Bernoulli distributions mixture is introduced. To connect the discrete part with the continuous distribution, the logit link function is used. The parameters of the model are estimated by using the likelihood maximum method. The score function and the information matrix are shown in detail. Antibody data from a study of the measles vaccine are used to illustrate applicability of the proposed model, and it was found the best fit to the data with respect to an others models used in the literature.
Cylindrical Gravitational Wave: Source and Resonance
Authors: Chen Yu-Zhu , Li Shi-Lin , Chen Yu-Jie , Dai Wu-Sheng
Published: August 2021

Gravitational waves are regarded as linear waves in the weak field approximation, which ignores the spacetime singularity. In this paper, we analyze singularities in exact gravitational wave solutions. We provide an exact general solution of the gravitational wave with cylindrical symmetry. The general solution includes some known cylindrical wave solutions as special cases. We show that there are two kinds of singularities in the cylindrical gravitational wave solution. The first kind of singularity corresponds to a singular source. The second kind of singularity corresponds to a resonance between different gravitational waves. When two gravitational waves coexist, the interference term in the source may vanish in the sense of time averaging.
Bipolar Picture Fuzzy Graphs with Application
Authors: Khan Waheed Ahmad , Ali Babir , Taouti Abdelghani
Published: August 2021

In this manuscript, we introduce and discuss the term bipolar picture fuzzy graphs along with some of its fundamental characteristics and applications. We also initiate the concepts of complete bipolar picture fuzzy graphs and strong bipolar picture fuzzy graphs. Firstly, we apply different types of operations to bipolar picture fuzzy graphs and then we introduce various products of bipolar picture fuzzy graphs. Several other terms such as order and size, path, neighbourhood degrees, busy values of vertices and edges of bipolar picture fuzzy graphs are also discussed. These terminologies also lay the foundations for the discussion about the regular bipolar picture fuzzy graphs. Moreover, we also discuss isomorphisms, weak and co-weak isomorphisms and automorphisms of bipolar picture fuzzy graphs. Finally, at the base of bipolar picture fuzzy graph we present the construction of a bipolar picture fuzzy acquaintanceship graph, which would be an important tool to measure the symmetry or asymmetry of acquaintanceship levels of social networks, computer networks etc.
A Case of Trauma-Induced Falciformispora lignatilis Eumycetoma in a Renal Transplant Recipient
Authors: Olenski Maxwell , Halliday Catriona , Gullifer James , Martinez Elena , Crowe Amy , Sheorey Harsha , Darby Jonathan
Published: August 2021

Mycetoma is a chronic, granulomatous, subcutaneous infection caused by several species of fungi and soil-inhabiting bacteria, and is divided into eumycetoma and actinomycetoma, respectively. Endemicity is described with worldwide distribution within the “mycetoma belt”; however, the global burden is ill-defined. Mycetoma is rare in Australia, with only a few published case reports. Over time, the breadth of eumycetoma pathogens has expanded with local epidemiology accounting for variations in regional prevalence. Direct inoculation of pathogens typically heralds the triad of subcutaneous mass, sinus formation and discharging grains. We describe a case of eumycetoma in a 48-year-old male Filipino renal transplant recipient who presented with a painless slow-growing elbow lesion. Ultrasonography revealed two ovoid masses and surgical excision ensued. Histopathology revealed necrotising granulomata with numerous chestnut-brown thick-walled cells, septate hyphae, and occasional grains. On suspicion of localised chromoblastomycosis, the isolate was sent to a reference laboratory which identified the fungus as Falciformispora lignatilis, an organism not hitherto associated with human infection. Amongst the solid organ transplant cohort, similar atypical presentations have been described. Clinicians need to consider eumycetoma where an epidemiological link with the tropics exists, especially in atypical presentations in transplant recipients, including absent preceding trauma.
Cell Culture Models for the Study of Hepatitis D Virus Entry and Infection
Authors: Heuschkel Margaux J. , Baumert Thomas F. , Verrier Eloi R.
Published: August 2021

Chronic hepatitis D is one of the most severe and aggressive forms of chronic viral hepatitis with a high risk of developing hepatocellular carcinoma (HCC). It results from the co-infection of the liver with the hepatitis B virus (HBV) and its satellite, the hepatitis D virus (HDV). Although current therapies can control HBV infection, no treatment that efficiently eliminates HDV is available and novel therapeutic strategies are needed. Although the HDV cycle is well described, the lack of simple experimental models has restricted the study of host–virus interactions, even if they represent relevant therapeutic targets. In the last few years, the discovery of the sodium taurocholate co-transporting polypeptide (NTCP) as a key cellular entry factor for HBV and HDV has allowed the development of new cell culture models susceptible to HBV and HDV infection. In this review, we summarize the main in vitro model systems used for the study of HDV entry and infection, discuss their benefits and limitations and highlight perspectives for future developments.
Preservation of Modern and MIS 5.5 Erosional Landforms and Biological Structures as Sea Level Markers: A Matter of Luck?
Authors: Furlani Stefano , Vaccher Valeria , Antonioli Fabrizio , Agate Mauro , Biolchi Sara , Boccali Chiara , Busetti Alice , Caldareri Francesco , Canziani Fabio , Chemello Renato , Causon Deguara Joanna , Dal Bo Elisa , Dean Silas , Deiana Giacomo , De Sabata Eleonora , Donno Yuri , Gauci Ritienne , Giaccone Thalassia , Lo Presti Valeria , Montagna Paolo , Navone Augusto , Orrù Paolo Emanuele , Porqueddu Alessandro , Schembri John A. , Taviani Marco , Torricella Fiorenza , Trainito Egidio , Vacchi Matteo , Venturini Elisa
Published: August 2021

The Mediterranean Basin is characterized by a significant variability in tectonic behaviour, ranging from subsidence to uplifting. However, those coastal areas considered to be tectonically stable show coastal landforms at elevations consistent with eustatic and isostatic sea level change models. In particular, geomorphological indicators—such as tidal notches or shore platforms—are often used to define the tectonic stability of the Mediterranean coasts. We present the results of swim surveys in nine rocky coastal sectors in the central Mediterranean Sea using the Geoswim approach. The entire route was covered in 22 days for a total distance of 158.5 km. All surveyed sites are considered to have been tectonically stable since the last interglacial (Marine Isotope Stage 5.5 [MIS 5.5]), because related sea level markers fit well with sea level rise models. The analysis of visual observations and punctual measurements highlighted that, with respect to the total length of surveyed coast, the occurrence of tidal notches, shore platforms, and other indicators accounts for 85% of the modern coastline, and only 1% of the MIS 5.5 equivalent. Therefore, only 1% of the surveyed coast showed the presence of fossil markers of paleo sea levels above the datum. This significant difference is mainly attributable to erosion processes that did not allow the preservation of the geomorphic evidence of past sea level stands. In the end, our research method showed that the feasibility of applying such markers to define long-term tectonic behaviour is much higher in areas where pre-modern indicators have not been erased, such as at sites with hard bedrock previously covered by post-MIS 5.5 continental deposits, e.g., Sardinia, the Egadi Islands, Ansedonia, Gaeta, and Circeo. In general, the chances of finding such preserved indicators are very low.
Impact of Groundwater Abstraction on Hydrological Responses during Extreme Drought Periods in the Boryeong Dam Catchment, Korea
Authors: Park Sanghyun , Kim Hyeonjun , Jang Choelhee
Published: August 2021

Groundwater withdrawal results in a significant depletion of groundwater storage due to the frequency and intensity of droughts and increasing irrigation demands. To ensure the sustainable use of groundwater resources, it is necessary to accurately simulate the groundwater behavior of catchments using a surface–groundwater integrated runoff model. Most of the existing catchment runoff models have been applied to surface water management; thus, integrated runoff analysis studies that consider the interaction between surface water and groundwater are required. Due to the intensive agricultural sector in Korea and the position of rice as the staple in the Korean diet, more than 50% of groundwater abstraction is used for irrigation. Therefore, it is very important to understand the hydrological interrelationships between agricultural areas and the entire watershed. This study aimed to compare and analyze the groundwater levels in the mountainous areas and paddy field areas in the Boryeong Dam catchment through a surface–groundwater integrated runoff simulation using the Catchment Hydrologic Cycle Assessment Tool model, and to compare the hydrological responses in wet years (2010–2012) and dry years (2014–2016). The maximum difference in the monthly groundwater level in the dry years compared to the wet years was 1.07 m at the forest catchment and 0.37 m at the paddy catchment. These results indicate that the impact of drought on the groundwater level of paddy catchments is not significant compared to the forest catchments; however, drought slows the recovery of the groundwater level before the rainy season, thereby limiting the agricultural groundwater use in the catchment.
Activated Ailanthus altissima Sawdust as Adsorbent for Removal of Acid Yellow 29 from Wastewater: Kinetics Approach
Authors: Rahman Najeeb ur , Ullah Ihsan , Alam Sultan , Khan Muhammad Sufaid , Shah Luqman Ali , Zekker Ivar , Burlakovs Juris , Kallistova Anna , Pimenov Nikolai , Vincevica-Gaile Zane , Jani Yahya , Zahoor Mohammad
Published: August 2021

In this study, Ailanthus altissima sawdust was chemically activated and characterized by Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR), Energy Dispersive X rays (EDX), and surface area analyzer. The sawdust was used as an adsorbent for the removal of azo dye; Acid Yellow 29 (AY 29) from wastewater. Different kinetic and equilibrium models were used to calculate the adsorption parameters. Among the applied models, the more suitable model was Freundlich with maximum adsorption capacities of 9.464, 12.798, and 11.46 mg/g at 20 °C, 30 °C, and 40 °C respectively while R2 values close to 1. Moreover, the kinetic data was best fitted in pseudo second order kinetic model with high R2 values approaching to 1. Furthermore, adsorption thermodynamics parameters such as free energy, enthalpy, and entropy were calculated and the adsorption process was found to be exothermic with a value of ∆H° = −9.981 KJ mol−1, spontaneous that was concluded from ΔG° values which were negative (−0.275, −3.422, and −6.171 KJ mol−1 at 20, 30, and 40 °C respectively). A positive entropy change ∆S° with a value of 0.0363 KJ mol−1 indicated the increase disorder during adsorption process. It was concluded that the activated sawdust could be used as a suitable adsorbent for the removal of waste material, especially dyes from polluted waters.
Área Alterada pela Ocupação de Posseiros em Marãiwatsédé, Terra Indígena Xavante
Authors: Aveiro Cessa Raphael Maia
Published: August 2021

Este trabalho objetivou quantificar a área alterada pela ocupação de posseiros em Marãiwatsédé, terra indígena Xavante localizada no Estado de Mato Grosso, Brasil, entre o período 1992 a 2013. A terra indígena Xavante Marãiwatsédé tem área de 165.770,99 hectares, localizada nos municípios São Félix do Araguaia, Alto Boa vista e Bom Jesus do Araguaia. A área delimitada deu-se a partir da Orbita 224, Ponto 68, do Satélite LANSAT 5. A identificação e quantificação da ocupação das áreas da terra indígena Xavante Marãiwatsédé deu-se por meio de mapas considerando as classes temáticas: complexo vegetativo (Florestas, Mata de galeria, Cerrado típico, Várzeas e áreas alteradas mas em processo de regeneração natural); áreas alteradas (utilizadas com agricultura e/ou pecuária). No ano de 1992 havia na terra indígena Marãiwatsédé 23,24% de áreas alteradas por uso de atividades agrícolas e/ou pecuárias, e 76,76% de complexo vegetativo. No ano da sua desintrusão, em 2013, a referida terra indígena continha 66,64% de áreas alteradas e 33,36% de complexo vegetativo. A taxa de alteração das áreas de Marãiwatsédé no período entre 1992, ano da ocupação por posseiros, e 2013, ano da desintrusão foi de 2,07% ano-1, área equivalente a 3.431,45 hectares. Com isso constatou-se que a ocupação de Marãiwatsédé culminou na redução de 43,40% do complexo vegetativo inicial.
Controle do pulgão da erva-doce Hyadaphis foeniculi e seletividade em abelhas Apis mellifera
Authors: Salvador Reinaldo Haron , Oliveira Robério de , Santos de Souza Mileny dos , Nunes do Nascimento Izabela , Nascimento Júnior José Luiz do , Luna Batista Jacinto de
Published: August 2021

A cultura da erva-doce Foeniculum vulgare tem grande importância no Nordeste brasileiro. O principal problema fitossanitário dessa cultura é o pulgão Hyadaphis foeniculi, que tem causado danos consideráveis, levando a aplicação de inseticidas. O uso de desses produtos, além de não recomendados para a cultura provoca redução de insetos benéficos, os agentes de controle natural e as abelhas, que formam um grupo muito diverso e diferente quanto à vulnerabilidade a exposição aos inseticidas. Considerando estes aspectos, esse trabalho teve como objetivo avaliar produtos eficientes no controle do pulgão da erva-doce H. foeniculi e a seletividade a abelha Apis mellifera. As abelhas e os pulgões foram coletadas em campo e submetidos a testes usando os seguintes produtos: detergente mais óleo, Prev-am e Provado® 200 SC, usando-se cinco repetições cada tratamento. Os dados de mortalidade foram submetidos às fórmulas de correção da mortalidade, Sun-Shepard e Abbott. Os tratamentos Óleo + Detergente, Prev-am e Provado® 200SC, controlaram eficientemente os pulgões chegando a índices de 100% de mortalidade, no entanto esses produtos não são seletivos para a espécie de abelha A. mellifera.
Teores foliares de NPK em gravioleira sob adubação orgânica e mineral
Authors: Oliveira de Malta Altamiro , Esfrain Pereira Walter , Nóbrega Torres Mariana Neves , Oliveira de Malta Alan , Almeida Medeiros Diego , Alves Dias Jefferson
Published: August 2021

Nos últimos anos, a fruticultura tornou-se um promissor setor de investimento. A gravioleira é uma frutífera cultivada em todo o Brasil, sendo a região Nordeste a que possui as maiores áreas implantadas. No entanto, a produção dessa cultura ainda é considerada baixa devido principalmente à escassez de informações sobre as técnicas adequadas de manejo, incluindo a nutrição da planta. Desta forma, o objetivo deste experimento foi avaliar os teores foliares de NPK em gravioleira sob adubação orgânica e mineral. Foi instalado um experimento em um pomar de gravioleira com 42 meses de idade entre os meses de janeiro a setembro de 2014. O delineamento experimental foi em blocos casualizados, com sete tratamentos e quatro repetições, com duas plantas por parcela, no espaçamento de 5,0 m x 5,0 m. Os tratamentos utilizados foram: T1= testemunha (sem adubação); T2= adubação mineral (NPK); T3= esterco de bovino; T4= esterco de aves; T5= adubação mineral + esterco de caprino; T6= esterco de aves + 3 kg de pó de rocha; T7= esterco de caprino. As variáveis analisadas foram: teores foliares de nitrogênio, fósforo e potássio. Os dados foram submetidos à análise de variância e ao teste de Tukey. A adubação orgânica com esterco bovino proporcionou maiores teores foliar de fósforo e potássio; O esterco caprino, seguido da adubação com NPK e esterco bovino promoveram maiores teores foliar de nitrogênio.
Substratos a base de esterco de animais para produção de mudas de mamoeiro
Authors: Siva do Nascimento Karinne , Nunes da Cunha Junior João Afonso , Souza Filho Júlio Ferreira de , Araujo da Silva Marcondes
Published: August 2021

Para obtenção de pomares vigorosos e sadios é necessário a produção de mudas com qualidade, e menor custo de formação, observando o mais adequado substrato utilizado, pois o mesmo deve ter características que permitam a boa formação e desenvolvimento da muda. Objetivou-se nesse trabalho avaliar o desenvolvimento de mudas de mamoeiro “Formosa” e “Hawaí” submetidas a diferentes dosagens de esterco bovino, ovino e caprino. O Experimento foi conduzido em casa de vegetação situada na Unidade de Aulas Práticas e Pesquisa (UAPP) do Instituto Federal de Educação, Ciência e Tecnológica do Piauí (Campus Oeiras). As sementes foram semeadas em copos de polietileno com capacidade de 0,5 L, colocando-se duas sementes por recipiente. As mudas foram desbastadas, deixando-se apenas a mais vigorosa por recipiente. A avaliação foi 70 dias após a semeadura, considerando-se as variáveis tais como: porcentagem de germinação, a altura linear das mudas (cm), diâmetro do colo (mm), número de folhas; matéria fresca da parte aérea (g), matéria fresca do sistema radicular (g), matéria seca da parte aérea (g), matéria seca do sistema radicular. Foram obtidos resultados satisfatórios nos tratamentos T5 e T8 composto de esterco ovino (1:1) e (somente esterco ovino) e T12 (somente esterco caprino).
Grau de conhecimento a respeito do Código Florestal Brasileiro (Lei nº 12.651) por parte de agricultores familiares que atuam nas feiras livres do município de Confresa-MT
Authors: Nascimento Rosa Isadora do , Tavares dos Santos Samuel
Published: August 2021

O presente artigo teve como objetivo verificar o grau de conhecimento dos feirantes, agricultores familiares, do município de Confresa-MT, a respeito do Código Florestal Brasileiro (Lei nº 12.651). Para isso, foi realizada uma entrevista com 26 agricultores familiares que atuam nas feiras livres do município de Confresa-MT. As respostas dadas por esse público despertam uma grande preocupação, tendo em vista revelar a pouca presença dos atores públicos responsável pela temática da questão ambiental, como a visita de órgãos de fiscalização ambiental. Provavelmente devido aquela pouca presença dos atores públicos em questão, este estudo também mostrou que esses agricultores têm baixo grau de conhecimento de temas relacionados àquela Lei, como área de Preservação Permanente ou de Reserva Legal. Embora o padrão de respostas obtido no presente estudo mostre que os mesmos não tem sido alvo de políticas públicas de fiscalização e/ou de educação ambiental, esse estudo também revelou que o público entrevistado possui uma considerável consciência ambiental.
Estudo da percepção ambiental dos alunos dos cursos técnicos em Agropecuária e Agroindústria do IFMT Campus Confres
Authors: Menezes Nascimento Nayara , Moreira Silva Iberê Marti , Vieira da Paz Brenda , Conceição do Vale Beatriz Santos
Published: August 2021

Este estudo foi desenvolvido para avaliar a percepção ambiental e dos resíduos de alunos do ensino Técnico Agroindústria e Técnico Agropecuária 1° e 3° ano, do Instituto Federal Campus Confresa que fica no Município de Confresa, localizada na região Centro Oeste de Mato Grosso, Brasil. Foi aplicado um questionário individual a 182 indivíduos, no mês de outubro de 2018, que responderam sobre questões que abordavam indivíduo/ambiente; contaminação ambiental pelos resíduos; percepção dos alunos com resíduos, coleta seletiva, preservação ambiental, educação ambiental; hábitos pessoas com meio ambiente. Os resultados obtidos revelam que os alunos compreendem suas responsabilidades com a contaminação e preservação ambiental, no entanto muitas ações não dependem somente deles, mas também das instituições públicas e privadas que muitas vezes suas ações não se transformam em práticas, e todos são responsáveis por cuidar não só do ambiente onde se vive, assim como em qualquer lugar que estiver.
Sistemas de Informação como Elementos Viabilizadores do Desenvolvimento Sustentável no Contexto Empresarial
Authors: Oliveira da Cunha Diego de , Souza Gomes dos Santos Ana Carla de , Schettini Pinto Carlos Alberto , Cunha Reis Augusto da
Published: August 2021

A presente pesquisa tem como objetivo geral, debater conceitualmente sobre os sistemas de informação como elementos viabilizadores do desenvolvimento sustentável. Como justificativa para a escolha do tema conceba sobre sua contemporaneidade, além da expectativa de contribuir para o campo acadêmico. A metodologia empregada é de natureza qualitativa, com pesquisa bibliográfica. Dentre os principais achados, foi possível concluir que as relações entre sociedade e meio ambiente surgem cada vez mais atreladas e evidentes no cotidiano, considerando as preocupações implicadas nas práticas humanas e seus impactos ambientais, bem como a necessidade de conscientização ambiental. Sendo assim, é necessário aplicar um dos maiores benefícios humanos a favor do desenvolvimento sustentável, momento em que as tecnologias da informação, por meio dos sistemas de informação, se tornam coerentes para promover uma gestão ambiental mais eficiente, efetiva e de qualidade na manutenção do desenvolvimento sustentável
Improving the efficiency of electromechanical processing by surface plastic deformation
Authors: Dudkina N.G. , Zakharov I.N. , Barinov V. V.
Published: August 2021

The article provides an overview of the experimental research developments of the recent years of the scientific school of the Volgograd State Technical University in the field of combined surface hardening of metals by electromechanical processing (EMP) in combination with surface plastic deformation (SPD). For a long time, the authors have been developing a scientifically based approach to the selection of an effective combination of technological effects based on electromechanical processing using surface plastic deformation on the surface layer of medium- and high-carbon steels. The advantage of the combined technologies based on EMP is the possibility to control the quality, structure, physical-mechanical and operational properties within a wide range by changing the hardening modes.
Programming the microcontroller in the real-time clock circuit when modeling the system in «Proteus»
Authors: Yudachev S.S. , Andryushin A. A. , Sitnikov S. S.
Published: August 2021

A variant of programming the microcontroller and modeling the system in the «Proteus» RTC (Real Time Clock) circuit, together with LED matrices, is proposed. The practical significance of the work is the study of the simplest logic circuits in the AVR assembler language, for instance, a shift register, a decoder, a LED matrix, a real-time clock circuit and a seven-bit indicator, both individually and in a full-fledged system. This work can be used for teaching students and for laboratory work in distance learning.
Finishing technologies. Cylindrical face grinders
Authors: Baranov A.A. , Istomin A. B.
Published: August 2021

The article provides an overview of the capabilities of circular grinding machines and the rules for their operation. These machines are widely used. They are designed for plungecut grinding of ends, longitudinal grinding of adjacent conical or cylindrical surfaces in a semi-automatic or automatic cycle. For example, in the conditions of serial production, the use of CNC systems provides a flexible construction of the grinding and dressing cycle. This allows you to quickly readjust machines for processing other products.
Improving the system for evaluating the effectiveness of project human resource management
Authors: Korneeva I.V.
Published: August 2021

To determine the directions of increasing the company’s competitiveness in general, it is necessary to analyze the effectiveness of human resource management, which is the subject of the article.
INFLUENCE OF PREBIOTIC PREPARATION USE DURING THE PERIOD OF INCREASING MILK YIELD ON MILK PRODUCTIVITY AND QUALITY VALUES OF FIRST-CALF COWS’ MILK
Authors: ПАНИН А.В. , САФОНОВ В.А. , ВОСТРОИЛОВ А.В.
Published: August 2021

Проведен научно-хозяйственный опыт по изучению влияния добавки с пребиотической активностью на жирнокислотный состав липидной фракции молока и показатели молочной продуктивности коров-первотелок черно-пестрой породы. Были сформированы 2 группы по 16 голов с учетом молочной продуктивности. В кормлении обеих групп использовался один рацион, дополнительно к которому в первые 100 дней лактации опытная группа получала добавку с пребиотической активностью в количестве 250 г на 1 голову в день. Установлено, что за 305 дней лактации от животных опытной группы по сравнению с контрольной получено больше молока на 790 кг и молочного жира — на 25,4 кг (Р<0,1). Наибольшая разница в показателях суточного удоя наблюдалась в период применения добавки с пребиотической активностью и в течение 3 мес после. Анализ колебаний уровня жирности молока в течение 305 дней лактации, равно как и жирнокислотного состава липидной фракции проб молока, не показал достоверных различий между данными двух групп. Отсутствие статистически значимых отличий в жирнокислотном составе на фоне статистически значимой (Р<0,1) разницы в показателях молочной продуктивности позволяет сделать вывод, что эффект увеличения молочной продуктивности был обусловлен действием пребиотической добавки.

Scientific and economic research was conducted to study the influence of a feed additive possessing prebiotic activity on fatty-acid composition of the lipid fraction of milk, and the values of milk yield for first-calf cows of the black-and-white breed. 2 groups with 16 each according to milk yield were created. Both groups were fed the same diet; during the first 100 days of lactation the testing group was receiving the additive possessing prebiotic activity in the amount of 250 g per 1 animal per day in addition to regular feed. It was found that during 305 days of lactation the animals belonging to the testing group produced 790 kg more milk and 25.4 kg more milk fat (P<0.1) compared to the control group. The greatest difference in the values of daily milk yield was observed during the period of using the additive possessing prebiotic activity and in the following 3 months. The analysis of fluctuations in milk fat content during 305 days of lactation, as well as the fatty-acid composition of the lipid fraction of milk samples, showed no significant differences between the data of the two groups. The lack of statistically significant differences in fatty-acid composition on the background of statistically significant (P<0.1) difference in milk yield values allows to conclude that the effect of increasing milk production was caused by the influence of the prebiotic additive.
A probiotikumok múltja, jelene és jövője
Authors: Papp-Bata Ágnes , Szakály Zoltán
Published: August 2021

Az étrend és egészség közötti kapcsolat tudományos igazolása, valamint az egészségtudatos döntéseket hozó fogyasztók egyre növekvő aránya társadalmi értékváltáshoz és az egészségvédő élelmiszerek iránti fokozott fogyasztói igényhez vezetett. A probiotikus termékek, különösen az aktív kultúrákat tartalmazó tejtermékek erőteljesen növekvő szegmenst képviselnek a funkcionális élelmiszerek piacán. Habár az emberiség már évezredekkel ezelőtt felismerte a fermentált tejtermékek jelentőségét az egészséges táplálkozásban, a bélflóra baktérium összetételének megváltoztatásának a tudományos alapokon nyugvó modern módszerei csak az elmúlt évtizedekben fejlődtek ki. A bélflóra probiotikumokkal történő megerősítése kulcsfontosságú szerepet játszik a kiegyensúlyozott immunfunkciókban, növeli a kórokozókkal szembeni ellenállást, javítja az emésztőrendszer funkcióit és potenciálisan elősegíti a rákkeltő anyagok eltávolítását a tápcsatornából. A probiotikus termékek iránti fogyasztói kereslet nagymértékű növekedést mutat, míg 2010-ben a világpiaci értékesítésük 21,6 milliárd USD volt, 2018-ra 49,4 milliárd USD-ra nőtt. A probiotikumok globális kereskedelmének 75%-át a probiotikus joghurtok, 16%-át az egyéb élelmiszeripari probiotikus termékek és 9%-át a probiotikus gyógyszerek teszik ki, azonban a jelenlegi trendek alapján a gyógyszeripari termékek szerepe fokozatosan növekedni fog a jövőben, vélhetően a hagyományos probiotikus tejtermékek rovására. Továbbá tekintettel arra, hogy 10-15 év múlva az időskorú lakosság vélhetően az egyik legjelentősebb fogyasztói tényezőnek fog számítani a nyugati és távol-keleti piacokon a probiotikum kereskedelmében, ennek megfelelően szükségessé válhat átalakítani és újrapozícionálni az innovációs és termékfejlesztési stratégiát is. A probiotikus tejtermékek piaci sikerének biztosításában és jövőbeni további növelésében a megfelelő marketingstratégiának és -kommunikációnak is kulcsszerepe van. A személyes motivációk, az egészségtudatos életmód és a bizalomteljes fogyasztói attitűd kialakításában fontos szerepe van a megbízható és hiteles tájékoztatásnak.JEL-kódok: D83, I10, L66
Gundelia tournefortii EkstraktlarınınAMES/mikrozom Testi ile Antimutajenitesinin Belirlenmesi ve Antimikrobiyal Aktivitesi
Authors: SARIGÜLLÜ ÖNALAN Fatma Esen , MERCİMEK TAKCI Hatice Aysun , UÇAN TÜRKMEN Filiz
Published: August 2021

Bu çalışmada ülkemizde özellikle Doğu Anadolu’da sıklıkla tüketilen Gundelia tournefortii (Kenger) bitkisinin genç saplarının AMES/mikrozom testi ile antimutajenik aktivitesinin ve antimikrobiyal aktivitesinin belirlenmesi amaçlanmıştır. Oda sıcaklığında ve nemsiz ortamda kurutma işlemi gerçekleştirilen kenger bitki ekstraktları su, metanol ve hekzan ile ekstrakte edilmiştir (1:10 (w/v)). Evaporatörde yoğunlaştırılan örnekler, son konsantrasyonları 1000 mg ml-1 olacak şekilde metanol ile ekstrakte edilmiştir. Ekstraktların Bacillus cereus ATCC 11778, Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Salmonella typhimurium ATCC 14028 karşı in vitro antimikrobiyal özellikleri araştırılmıştır. 1000 mg ml-1 metanol ekstraktının metisilin dirençli Staphylococcus aureus ATCC 25923 suşuna karşı 15 mm çaplı antimikrobiyal etki gösterdiği saptanmıştır. Kenger bitkisinin su ekstraktlarının 21 mg ml-1, 43 mg ml-1, 87 mg ml-1, 175 mg ml-1 konsantrasyonlarının antimutajenik aktiviteleri Ames yöntemi ile tespit edilmiştir. 21 mg ml-1 konsantrasyondaki su ekstresinin S9 varlğında ve yokluğunda güçlü düzeyde antimutajenik aktivitesi belirlenmiştir.
Esclavizados y arqueología de la esclavitud:
Authors: Ceruti Carlos
Published: August 2021

Se describen brevemente los sitios y materiales arqueológicos de la localidad arqueológica de Arroyo Leyes; se identifican las características principales de los tipos cerámicos excavados por coleccionistas entre 1934 y 1938; se elaboran hipótesis sobre su origen y se relacionan las piezas con prácticas religiosas y mágicas de origen africano, consecuentes con la esclavización de habitantes del Golfo de Guinea.
Análisis militar de terreno en arqueología de campos de batalla:
Authors: Leoni Juan Bautista
Published: August 2021

El análisis del terreno desde una perspectiva específicamente militar es una herramienta esencial para el estudio de batallas del pasado. La premisa básica que lo guía es que el terreno, incluyendo tanto los rasgos naturales como antrópicos, influye de manera decisiva en las batallas, tanto en el plano estratégico como táctico, condicionando su desarrollo y resultado. Es por ello que las investigaciones históricas y arqueológicas de campos de batalla han comenzado a incorporar esta perspectiva de análisis de manera rutinaria, destacándose el proceso analítico conocido como KOCOA, desarrollado en los Estados Unidos. En este trabajo se ensaya la aplicación de dicho protocolo al análisis del campo de batalla de Pavón, donde el 17 de septiembre de 1861 se libró un enfrentamiento crucial para nuestra historia nacional, definiéndose el curso del proceso de construcción del estado nacional argentino. Se exploran las distintas dimensiones que definen la configuración del campo de batalla, contrastándose la información así obtenida conlas interpretaciones historiográficas de la batalla y con la evidencia arqueológica recuperada hasta el momento.
La prosperidad privada en el periodo tardío:
Authors: Crivelli Montero Eduardo
Published: August 2021

Durante el Período Tardío de Egipto, en el delta del Nilo se erigieron grandes edificios de adobe en forma de torre. Estas construcciones privadas, de función doméstica, se explican por el aumento demográfico, el creciente urbanismo, la búsqueda de mayor seguridad y el deseo de exhibir grandeza. En la base de estas innovaciones se encuentran las nuevas vías de enriquecimiento (comercio, capital financiero, adqui- sición de tierras, monetización, etc.) y los episodios de debilitamiento del Estado central.

Se comparan las construcciones egipcias con otras semejantes de diferentes regiones.
Arqueologia pública e novas tecnologias:
Authors: Zarankin Andrés
Published: August 2021

Este trabalho analisa formas alternativas de construção e preservação do patrimônio, relativasà ocupação humana da Antárticapor grupos subalternos,assim como suas invisibilidades nos discursos oficiais sobre a colonização do continente. A proposta associa abordagens de arqueologia pública, sensorial e digital, propondo narrativas plurais e democráticas sobre o passado do extremo austral. Utilizando ferramentas como as de novas tecnologias aplicadas às pesquisas arqueológicas (laser scan3D, scanner de objetos, impressoras 3D, drones e outros), umaexposição sensorial itinerante (que simula o ambiente antártico dentro de um domo inflável), o desenvolvimento de ferramentas de realidade aumentada e um videogame;buscamos estreitar os canais de comunicação entre o público arqueológico e não-arqueológico, incentivando a construção de narrativas multivocais sobre a ocupação humana da Antártica.
Radical youth communities in the virtual space
Authors: IVANOV Andrey Valeryevich , SIRYUKOVA Yana Alexeevna
Published: August 2021

Virtual space (Internet space) is a universal cross-border environment in which a considerable number of topics and concepts of destructive orientation among young people circulate and are popularized generated. The Internet has become one of the most important and effective means of communication in the modern world. Virtual communities usually become actors in information as well as political processes. The article deals with youth subcultural communications in radical Internet communities. First of all, these communications are based on concepts and patterns that arise in connection with the establishment as well as the implementation of xenophobic views and teachings. Political, ideological, racial, national, or religious hatred against any social, religious, or ethnic group, the promotion of homicidal scenarios, or even auto aggression becomes a pivotal key in consolidating users in such destructive communities. Overall, it can be concluded that the development of adverse opinions of communicative behavior relevant to other participants in virtual communities may well result in an enhanced sense of collective identity.
International relations of Russia from the perspective of educational migration
Authors: KARIMOVA Luiza , SAGITOVA Victoria , KIRPICHNIKOVA Anna , HOANG Ha
Published: August 2021

Educational migration being a part of social and intellectual migration is one of the most serious factors of the development of countries taking part in this process. Perspectivity and relevance of studying the dynamics of international relations of the Russian Federation from the perspective of educational migration are determined by opportunities to analyze the dynamics of the social structure of the society and mobility of different groups and communities under the influence of migration. The article using general scientific methods (analysis, synthesis, comparison, classification, etc.) and methods of applied statistics consider (on the basis of official statistical data) the dynamics of the group of foreign students and graduates studied in Russian institutions of higher education, their distribution across the country, trying to find out the regions for which Russian education is more attractive. Authors draw conclusions that for foreign students Russian Federation is getting more attractive that is proven by the increase in their amount from the early 2000-s.