bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis and characterization of molecularly imprinted composite as a novel adsorbent and competition with non-imprinting composite for removal of dye
Authors: YILDIRIM Ayfer , ACAY Hilal , BARAN Ayşe
Published: May 2021

Due to its high visibility, high resistance, and toxic effects, colored substances in the textile and other dyeing industries waste-water cause great damage to biological organisms and ecology. Therefore, current research efforts to develop high selectivity, specificity, and efficient water treatment technologies are very intense, and molecularly imprinting methods (MIM) constitute a category of functional materials to meet these criteria. Polymethylmethacrylate-chitosan molecularly imprinted composite (PMMAC-MIC) and non-imprinted composite (PMMAC-NIC) were successfully prepared by MIM. Dye adsorption performance of MIC and NIC composites was investigated by comparison. The obtained adsorbents were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and zeta potential techniques. The kinetics of adsorption followed a pseudo-first-order model while the Langmuir adsorption isotherm provided the best fit. The maximum adsorption capacity of dye was found as 93.78 mg/g for PMMAC-MIC and 17.70 mg/g for PMMAC-NIC at 298 K temperature, the initial dye concentration was 100 mg/L. Thermodynamic parameters indicated that the removal of dye from PMMAC-MIC was endothermic and spontaneous. Besides, the regeneration of composite was recycled four times.
Análise residual e macroestrutural do comportamento do concreto adicionado com fibras de polipropileno submetido a elevadas temperaturas
Authors: Godinho Daiane Silva , Tramontin Marcos , Martins Davi Marcelo , Magnus Juliana Cesáreo , Oliveira Ezequiel
Published: May 2021

A utilização de fibras adicionadas ao concreto tem o intuito de melhorar as suas propriedades, as fibras tem tido papel de destaque nos últimos anos, sendo objeto estudo em muitas pesquisas. As fibras de polipropileno são empregadas principalmente para minimizar o aparecimento das fissuras originadas pela retração do concreto. O presente trabalho tem como objetivo estudar o comportamento do concreto com a adição de fibras de polipropileno exposto a altas temperaturas em concreto C50 baseado em trabalho já realizado no ano de 2016 por Vieira, com o intuído de dar continuidade as pesquisas. Os corpos de provas foram expostos a um aquecimento de 200 °C, 300 °C, 500 °C, 700 °C e 900 °C, simulando uma situação de incêndio através da moldagem de corpos de prova cilíndricos com 10 cm de diâmetro e 20 cm de altura e comparados com uma amostra de referência sem incorporação de fibras. Foram realizados os ensaios de perda de massa, resistência à compressão axial, módulo de elasticidade e resistência à tração por compressão diametral. Os resultados foram apresentados em formas de gráficos, com os quais é possível concluir que no decorrer do processo de manuseio e adição das fibras ao concreto, as dificuldades de trabalhabilidade interferiram diretamente na obtenção dos resultados. Tendo as fibras piorado as propriedades de tração do concreto, reduzindo a resistência à compressão do mesmo, assim como diminuindo seu módulo de elasticidade.
Suscetibilidade á fissuração das argamassas produzidas com agregados de cerâmica vermelha
Authors: Prado Raquel Nazario da Rosa , De Oliveira Valeria Costa
Published: May 2021

No decorrer dos últimos anos, inúmeros materiais vêm sendo pesquisados com o intuito de melhorar as propriedades da argamassa de revestimento, bem como contribuir para a redução dos impactos ambientais. Esta pesquisa tem como objetivo o conhecimento do comportamento das argamassas quanto a tendência à fissuração quando se emprega agregados reciclados de cerâmica vermelha em substituição ao agregado natural. Para tal foram produzidas três argamassas, uma de referência e duas com substituições da areia natural pelo RCV nos percentuais de 10% e 20%. As caracterizações das argamassas seguiram os ensaios normatizados no estado fresco, quanto a consistência, teor de ar incorporado, retração plástica e no estado endurecido; resistências mecânicas, módulo de elasticidade e variação dimensional. As argamassas apresentaram quanto a tendência à fissuração, baixa e média suscetibilidade no critério retração por secagem, média suscetibilidade quando se avaliou o módulo de elasticidade e alta suscetibilidade quando se relacionou o módulo de elasticidade a resistência à tração na flexão.
Efektywność inwestowania w otwartych funduszach inwestycyjnych w Polsce w latach 2001–2010
Authors: Jurek-Wasilewska Kinga
Published: May 2021

Niniejszy artykuł ma na celu ocenę efektywności lokowania kapitału w jednostki uczestnictwa funduszy inwestycyjnych w Polsce z wykorzystaniem stóp zwrotu oraz uwzględniających ryzyko miar rentowności opartych na modelu wyceny aktywów kapitałowych (z ang. Capital Asset Pricing Model – CAPM). Przeprowadzona analiza polegała na statystycznej weryfikacji jakości zarządzania aktywami funduszy w odniesieniu do wyników portfela rynku, w różnych warunkach rynkowych. Badaniem objęte zostały otwarte fundusze inwestycyjne rynku krajowego w podziale na grupy według kryterium prowadzonej polityki inwestycyjnej w latach 2001–2010. Rezultaty przeprowadzonej oceny efektywności funduszy pozwoliły stwierdzić, iż w obliczu zmiennych warunków rynkowych w badanym okresie efektywność inwestowania w jednostki uczestnictwa funduszy inwestycyjnych, niezależnie od realizowanej przez nie polityki inwestycji i towarzyszącego jej poziomu ryzyka, nie różniła się istotnie bądź była istotnie gorsza od wyników portfela obrazującego rynek. Przyczyn powyższego zjawiska należy upatrywać w możliwym deficycie wiedzy, informacji i umiejętności zarządzających bądź zawodności narzędzi analizy, którymi się posługiwali.
Analiza finansowa oraz modele przewidywania upadłości jako narzędzie oceny kondycji finansowej przedsiębiorstwa
Authors: Pierzchalska Wioletta Barbara
Published: May 2021

Wczesne rozpoznanie pojawiającego się zagrożenia upadłością jest warunkiem koniecznym dla możliwości podjęcia szybkich działań naprawczych i uniknięcia bankructwa. Wczesna detekcja jest umożliwiona dzięki istnieniu modeli wczesnego ostrzegania. W artykule autor starał się podsumować mocne i słabe strony analizy finansowej oraz modeli wczesnego ostrzegania w monitorowaniu sytuacji finansowej przedsiębiorstwa, by być w stanie wychwycić potencjalne sygnały niebezpieczeństwa bankructwa. Plusy i minusy obu metod są zwykle uważane za oczywiste i naturalne, lecz gdy zachodzi potrzeba wybrania jednej z nich, bądź uzupełnienia wybranej brakującymi danymi, staje się to trudne przez niedostateczną świadomość zalet i wad analizy finansowej bądź modeli upadłościowych. Co więcej, świadomość mocnych i słabych stron tych metod, pozwala w dogłębniejszy sposób zrozumieć ich specyfikę i użyć lepszą metodę, bądź być w stanie uzupełnić wybraną brakującymi danymi, by dopełnić obraz sytuacji finansowej przedsiębiorstwa. Artykuł zawiera najczęściej spotykane przyczyny upadłości, ogólną klasyfikację metod badania bankructwa oraz większość wad i zalet analizy finansowej oraz modeli wczesnego ostrzegania.
Czynniki wpływające na atrakcyjność kredytu hipotecznego – analiza empiryczna
Authors: Karwowska Milena
Published: May 2021

W artykule przedstawiono charakterystyczne, kluczowe z punktu widzenia potencjalnego kredytobiorcy elementy kredytu hipotecznego. W artykule zaprezentowano wyniki badań przeprowadzonych na grupie młodych ludzi odnośnie ich preferencji względem postrzegania kredytu hipotecznego i znaczenia jego poszczególnych elementów dla decyzji kredytobiorców. Przedstawiono nastawienie potencjalnych kredytobiorców do produktu bankowego jakim jest kredyt hipoteczny.
Zabezpieczenie inwestycyjne innowacyjnej działalności przedsiębiorstw na Ukrainie
Authors: Juryniec Zoryna
Published: May 2021

W artykule przeprowadzono badania wpływu czynników oddziaływujących na skuteczność inwestycyjnej i innowacyjnej działalności przedsiębiorstw na Ukrainie. Przedstawiono źródła finansowania działalności innowacyjnej przedsiębiorstw, które przyczyniają się do rozszerzenia możliwości dla przyszłego rozwoju innowacyjnego. Główną uwagę poświęcono problemom w zakresie objętości inwestycji dla stworzenia innowacji i ustaleniu struktury wydatków według źródeł finansowania działalności innowacyjnej. Zaproponowano drogi rozwiązania problemów we współczesnych warunkach rozwoju gospodarki. Wyprodukowano wizję kształtowania, planowania i realizacji kierunków strategicznych rozwoju innowacyjnego przedsiębiorstw krajowych.
Jaką formę opodatkowania dochodu wybrać dla działalności budowlanej?
Authors: Bednarska Aleksandra
Published: May 2021

Współcześnie, w okresie dużego bezrobocia i niekorzystnej polityki zatrudnienia wielu z nas podejmuje kroki w kierunku prowadzenia własnej firmy. Samozatrudnienie niewątpliwie wiąże się z doborem odpowiedniej strategii podatkowej. Eksperci twierdzą, że głównym czynnikiem utrudniającym wybory przedsiębiorców są niestabilne i zawiłe przepisy prawne oraz duża dynamika ich zmian. Zarządzanie podatkami ma zróżnicowany wymiar. W zależności od formy organizacyjnej, wielkości firmy wyróżnia się różne motywy, cele decyzji odnośnie optymalnego opodatkowania. W charakterze mikroprzedsiębiorstw osób fizycznych decyzje te są podejmowane najczęściej w oparciu o cele osobiste podatnika. Artykuł przedstawia problem wyboru formy opodatkowania dochodu małych firm, zarządzanych przez osoby fizyczne. Obecny system podatkowy przewiduje opodatkowanie w tej kwestii kartą podatkową, zryczałtowanym podatkiem od przychodów ewidencjonowanych, stawką liniową czy też podatkiem dochodowym na zasadach ogólnych. Celem pracy jest zapoznanie z metodami rozliczeń oraz analiza przyjętej przez badany podmiot formy opodatkowania z innymi możliwymi metodami kalkulowania podatku.
Outsourcing usług informatycznych – aspekty podatkowe
Authors: Bernat Rafał
Published: May 2021

Celem artykułu jest omówienie charakteru opodatkowania outsourcingu usług informatycznych. Wykonujący usługi informatyczne staje się przedsiębiorcą w rozumieniu VAT w przypadku gdy jego usługi świadczone są permanentnie w sposób zarobkowy. Skutek zawarcia umowy outsourcingu usług informatycznych na gruncie podatku od czynności cywilnoprawnych uzależniony jest od intencji stron. Ma to przełożenie także na stawki podatku (1%, 2% lub zwolnienie przedmiotowe). Jako postulat de ferenda przyjęto potrzebę wprowadzenia zwolnienia usług informatycznych w zakresie VAT.
Factoring as a Special Means of Financing SMEs’ Activities – the Case of Enterprises in the Lodz Area
Authors: Piguła Ewelina , Paduszyńska Marta
Published: May 2021

The article considers the usefulness of factoring as a short-term instrument allowing enterprises to finance their activities. Suppliers choosing factoring can offer buyers extended debt payment periods, improve their liquidity, as well as gaining access to additional services offered by factors. This analysis focuses on the benefits, usefulness and weaknesses of factoring, including the business effects of this facility and the prospects of its development. An attempt is made to demonstrate that factoring has a great potential for growth as a source of short-term funding for small- and medium-sized enterprises (SMEs). Two methods are used to this end: a review of the pertinent Polish and foreign literature including research articles, and a questionnaire survey of 20 SMEs with relevant experience in using this facility. The analysis of the usefulness and cost-effectiveness of factoring shows that in the period 2010–2014 in which market instabilities were observed factoring was a useful and frequently employed means of short-term funding.
Espacialidades da Várzea Amazônica: os Casos de Afuá, Mocajuba e Belém
Authors: Duarte Cardoso Ana Cláudia , Vicente Leticia , Brito Romario
Published: May 2021

Este artigo dedica-se à caracterização de um repertório espacial próprio de regiões de várzea amazônica, para discutir a assimilação dos territórios da várzea pela lógica exógena de urbanização contemporânea. O texto caracteriza espacialmente a ocupação de várzea a partir de três casos: Belém, polo metropolitano; Mocajuba, município afetado pela UHE Tucuruí, e Afuá, município ribeirinho do arquipélago do Marajó, para explorar analogias de ocupação nas três escalas de aglomeração. Dentre os casos analisados, evidencia-se a articulação dialética entre campo e cidade em diversas trajetórias: as tipologias de várzea ocuparam as baixadas da capital e, estigmatizadas como espaço da pobreza e precariedade, justificaram aterros e macrodrenagens, alimentando o desejo de modernizar as várzeas urbanas da pequena Afuá, ou das vilas de Mocajuba, que davam suporte à abundante e resiliente vida ribeirinha.
Teaching Speaking and The Teacher`s Role for EFL Learner in Emergency Remote Teaching (A Qualitative Study on Non-English Department Students)
Authors: Wulandari Fitriya Dessi
Published: May 2021

Teaching EFL nowadays confronts a technical problem of having non face to face meeting. Amongst the four skills in teaching EFL, speaking still be the trend in language research especially in emergency remote teaching. This study revealed teaching speaking and the teacher`s role for EFL Learner in non-English department class. The data were taken from online interview, self-written and observation. The research was taken on online class of Speech Therapy students which undergo on the online class group. The results showed that teaching speaking using video and voice note as media for teaching and learning successfully made the process occur effectively and meaningfully. The use of video stimulate students’ interest and motivation in learning the materials. Moreover, voice note be an effective media in practicing speaking, giving feedback and discussing. The result contributed to teachers and other researchers for selecting the suitable media in teaching and practicing speaking amidst the emergency remote teaching.
Grammatical Errors Made by Students in Speaking English
Authors: Damaiyanti Susi
Published: May 2021

This study is aimed to reveal the types of grammatical errors made by students in speaking English in the English department of IAIN Takengon. When speaking, students generally did not realize and understand the classification of errors they were making. Thus, it is deemed necessary to identify, classify, and describe the various grammatical errors as an attempt to build their awareness of using structured and standardized English rules. This research was conducted using a qualitative descriptive method. After analyzing the errors proposed by Dulay, the findings showed that the most common error in students’ grammar is misuse or misplacing of verbs, nouns, conjunctions, pronouns, prepositions, and parts of speech. Based on the error category, students' most common error is omission, followed by overgeneralization, over-regulation, and misordering, completed by other errors such as carelessness. Meanwhile, the causes of grammatical errors were the internal factors; anxiety, limited linguistic resources, and motivation deficiency; the external factors were an unsupportive environment and the stressful teaching and learning process.
ANTIBIOTIC SUSCEPTIBILITY OF BACTERIA ISOLATED FROM OPEN FRACTURE GRADE III PRESENTING TO DR. SOETOMO GENERAL HOSPITAL SURABAYA
Authors: Wibisono Raden Taufan Mulyo , Utomo Dwikora Novembri , Widodo Agung Dwi Wahyu
Published: May 2021

Background: Open fracture is a typical case in the orthopedics field. Infection in the open fracture can cause osteomyelitis. Antibiotic susceptibility test of patient specimen bacteria with open fracture aims to obtain the suitable antibiotic agents to treat infectious diseases caused by these bacteria.Methods: This research is a descriptive study to assess Antibiotic susceptibility in the case of open fracture grade III in Dr. Soetomo General Hospital Surabaya. A total sampling was performed from microbiological culture results of patients diagnosed with open fracture grade III after debridement from October 2018 to September 2019. The identification of the microbes was based on Gram-positive and Gram-negative categories and the classification based on susceptibility to antibiotics classified into sensitive, intermediate, and resistant.Results: Data from microbiological culture results of patients with a diagnosis of open fracture grade III after debridement in October 2018 to September 2019 in Dr. Soetomo General Hospital Surabaya showed 56 research subjects who met the criteria. Acinetobacter baumannii is the most common bacterial species found in the microbiological examination of patients with open fractures, 15.84%. Cefazoline and ceftriaxone showed low susceptibility. Meanwhile, levofloxacin showed a relatively good value of susceptibility in both Gram-positive and negative bacterial groups.Conclusion: The antibiotic susceptibility pattern of bacteria from specimens in open fracture grade III patients in Dr. Soetomo General Hospital Surabaya varies between each species of bacteria isolate.
Russia's Foreign Trade with Persian Gulf Countries
Authors: Shkvarya L.
Published: May 2021

The Russian Federation is ever more actively joining world economy processes, and it is important for it to diversify foreign trade relations. In this respect, the Cooperation Council for the Arab States of the Gulf (CCASG) countries appears to be a quite real alternative to industrially developed countries. In the article, stages and the contemporary state of economic relations between Russia and CCASG are analyzed, key ongoing problems are specified.
Latin America: Imperatives of Democracy
Authors: Dabagyan E.
Published: May 2021

One of the important aspects of Latin American countries political development – the issue of a president's tenure – is analyzed in the article. The author presumes that in a number of Latin American states, along with doubtless achievements in democracy consolidation, a trend to administration prolongation has emerged. This, as accentuated in the article, may signify backsliding into authoritarianism, and, therefore, poses a threat to democracy.
Human Development: Quantitative Measurement and Processes in World System
Authors: Grishin I.
Published: May 2021

This publication presents regular materials of the scientific workshop "Modern Development Problems", hosted by Dr. V. Khoros, head of Center for Development and Modernization Studies at the Institute of World Economy and International Relations, Russian Academy of Sciences. A spokesperson is V.A. Krasil'shchikov, Dr. Sci. (Economics), Head of Section at IMEMO. Human Development Index calculated by the UN since 1980s on the basis of GDP per capita, lifespan and education of population is chosen as a primary criterion.
Mongolia in Modern System of International Relations
Authors: Yakushev S.
Published: May 2021

The geographical position of Mongolia between two largest Eurasian states – Russia and China – predetermined the choice of its foreign policy priorities. On the author's opinion, the key difference of Mongolian government's new state policy in the international relations field is a multi-vector course, commitment not only to Russia (as in previous years), but also to China, as well as promotion of cooperation with other developed and high powered countries – the USA and Japan.
Another Missed Opportunity
Authors: Shishkov Y.
Published: May 2021

The article is devoted to the analysis of difficulties in implementation of several international agreements on averting the environmental and, first of all, climatic threat in the modern world. Business and governments of countries having environmentally dirty industry reluctantly support international agreements on greenhouse gases emission limitation as far as it impairs their competitiveness, they lose market outlets and incomings, while the state budgets find tax proceeding missing.
Russia. Matrix of Social (In)stability
Authors: Fomin M.
Published: May 2021

In the present article, the author analyzes the issue of conflict zones around Russia in the post-Soviet space. The events of August 2008 in the Caucasus region outlined many problems, the solution of which determines significantly Russia's security. At that, not only "frozen" conflicts in South Caucasus and Moldova carry the destructive potential. Territorial problems also exist between Russia and Ukraine. The question of the Caspian Sea legal status remains unclear, while it is bordered with Central Asia with its social, ethno-religious and territorial problems, which creates the "instability belt" on Russia's southern borders. Russia's policy success and its world role will primarily depend on its economic and scientific potential, its capacity for rapid development.
Real Step in Post-Soviet Economic Integration
Authors: Ivanov I.
Published: May 2021

The script x-rays the phenomenon of the Customs Union between Russia, Kazakhstan and Belarus as a milestone in the process of the CIS economic reintegration. Under review are centripetal and centrifugal forces behind this reintegration, the structure, instruments and goals of the Union to be upgraded into a Single Economic Space of the founding states, as well as international implications concerned, including relations with the EU and WTO.
BRIC: Myth of Reality?
Authors: Kheifets B.
Published: May 2021

The article analyzes the main features of BRIC's development with regard to the intensifying criticism towards the existing format of this intergovernmental institution. Special emphasis is laid upon Russia's role in BRIC, as well as upon consequences of the 2008–2009 global crisis for each BRIC country. The author draws a conclusion that BRIC as a new informal institute is a reality of international economic and political relations and is of undoubted interest for all its members. For Russia it is important to use the BRIC to advance new international initiatives, as well as for exchange of economic development experience on many key issues.
Economic Interaction of Russia and China: from Bilateral Format to Regional One
Authors: Mozias P.
Published: May 2021

The article discusses economic aspects of the strategic partnership of Russia and China, in particular, the dynamics of bilateral trade, the changes in its structure, the need for our country to pursue a long-term industrial policy in order to depart from mainly commodity orientation of exports to China. It is concluded that the situation in the bilateral trade situation could not satisfy the Russian partners because it contradicts to the objectives of the development perspective and to the challenges of modernizing Russian economy.
Information Security of Russia: Political and Cultural Aspects
Authors: Rovinskaya T.
Published: May 2021

The article is devoted to the information security of Russia. It includes two main aspects: conceptual (political concepts, legislation, cultural specifics of the country) and practical (real law enforcements mechanisms, economic and technological opportunities). New Russia's information policy development specifics, threats to information security and the countermeasures, forms of Russia's international cooperation in the field are thoroughly examined in the paper.
Taiwanese Modernization against Background of Russian and Chinese Ones
Authors: Larin A.
Published: May 2021

The author attempts to compare some key aspects of modernization in Taiwan, on the one hand, and Russia and China, on the other hand. The aim is to understand what provided the efficiency of the Taiwan version and to what extent the Taiwanese experience can be useful for our country. Despite all differences between Taiwan and Russia, the author believes, the essence of modernization in both cases is common, because the general objectives are the same.
Pacific Asia: Economic Integration and Prospects of Russia
Authors: Usol'tsev V.
Published: May 2021

The article describes in detail the integration processes in the Asia-Pacific region, the influence of the Asian financial crisis of 1997-1998 biennium. and the world crisis 2007-2008 biennium, as well as the prospects of the Russian connection.
«Ultra-Right» Parties in Modern Europe
Authors: Biryukov S. , Barsukov A.
Published: May 2021

“Far right” parties present an important part of the all-European political landscape. An ideological source for many of them is the political platform of the “New right” – a wide group of philosophers, sociologists, historians, writers, who has actively acted in the early 1970th with a criticism of the liberal and socialist bases of the “European project”. Processes of globalization and regionalization, crisis of traditional ideologies and state model lead to a change of the agenda of European Right, to strengthening of the right populist, euro-regionalist and alter-globalist trends.
Inteligência artificial como suporte a sistemas de controle e contabilidade gerencial:
Authors: Avelar Ewerton Alex , Vinícius Dias Jordão Ricardo , Maria Couto Ferreira Gabriela , Najela Ekaterina Ribeiro da Silva Beatriz
Published: May 2021

Destaques: Em um ambiente de economia compartilhada, a forma de exercício do controle pelas empresas pode mudar radicalmente. Nesse contexto, destaca-se o crescimento do emprego de decisões baseadas em algoritmos. Em especial, é cada vez mais popular o uso da inteligência artificial (IA) por parte de empresas para controlar o trabalho dos colaboradores. Tais mudanças tecnológicas influenciam significativamente os sistemas de controle e contabilidade gerencial (SCCG).

Objetivo: Analisar o papel da IA como suporte às diferentes ferramentas do SCCG da 99 Tecnologia Ltda (99TL) e da UBER no Brasil, tendo como base o modelo proposto por Malmi e Brown (2008).

Desenho/Metodologia/Abordagem: A pesquisa se caracteriza como qualitativa, exploratória e documental. Os dados (visuais e verbais) foram coletados por meio de documentos das empresas divulgados publicamente e de relatos de motoristas parceiros. Esses dados foram tratados e analisados com base na análise de conteúdo, sendo que foram usadas como principais categorias aquelas baseadas nos pacotes de controles dos SCCG propostos por Malmi e Brown (2008).

Resultados: Constatou-se que várias ferramentas de controle empregadas pela 99TL e pela UBER podem ser categorizadas de acordo com os pacotes de controle de Malmi e Brown (2008). Ademais, verificam-se muitas similaridades entre as empresas em relação às ferramentas empregadas em cada pacote do SCCG para incentivar os motoristas. No que se relaciona ao papel da IA, há evidências de que ela transpassa praticamente todos os pacotes de controle apresentados, em especial, os controles cibernéticos, de prêmios e compensações e administrativos.

Limitações da investigação: (a) O uso de uma amostra não probabilística dos motoristas; (b) o fato de que alguns motoristas têm a visão de sua localidade de atuação, podendo confundir situações regionais com nacionais; e (c) o acesso a alguns controles via dados secundários é limitado (em especial, no que se refere a controles financeiros).

Implicações práticas: A pesquisa demonstra diversas evidências do papel central da IA como suporte ao SCCG das empresas de transporte por aplicativo. Ademais, destaca-se como os motoristas compreendem os incentivos dos SCCG das empresas, reagindo aos mesmos.

 

Originalidade/valor: (i) Enfocou-se a inter-relação entre o SCCG e a economia compartilhada, algo raro tanto nacional quanto internacionalmente; (ii) demonstrou-se que é possível a aplicação do modelo de Malmi e Brown (2008) em empresas com modelos de negócios diferenciados como o transporte por aplicativo; (iii) abordou-se o papel cada vez mais central da IA nos sistemas de controle gerencial; e (iv) foi proposta uma nova abordagem metodológica de pesquisa na área, empregando dados baseados em relatos públicos.
Kontribusi konsep Green Moral Dalam Mendukung SDGs di Era Revolusi Industri 4.0
Authors: Praja Wina Nurhayati
Published: May 2021

ABSTRAKPenelitian ini dilatar belakangi oleh berbagai permasalahan lingkungan yang terjadi saat ini. Kerusakan lingkungan yang dihadapi sedikitnya terjadi dari ulah tangan manusia yang tidak bertanggung jawab. Tujuan penelitian ini untuk memberikan pandangan masyarakat tentang pentingnya menjaga dan melestarikan alam, agar alam itu memberikan kebermanfaatan untuk kehidupan. Pendekatan yang digunakan adalah kualitatif dengan metode etnopedagogi. Hasil penelitian yang penulis peroleh yaitu: (1) Proses pembinaan masyarakat melalui adat istiadat yang sudah lama terbangun memberikan filosofis kuat dalam bersikap bijak terhadap alam,melalui adat istiadat upacara adat nyuguh, babarit, dan sedekah bumi. (2) Dalam mempertahankan adat istiadat di tengah Revolusi Industri 4.0, dengan membumikan nilai-nilai adat yang bermilai luhung terutama dalam menyeleksi dan membatasi teknologi-teknologi yang dirasa kurang bermanfaat untuk masyarakat sekitar. (3) Konsep SDGs, sangat didukung oleh masyarakat adat Kuta terutama dalam pelestarian alam. Masyarakat masih memegang teguh pelestarian alam dengan sangat menghormati lingkungan alamnya, alam itu dijadikan sebagai nilai kehidupan tertinggi bagi mereka.

ABSTRACTThe contribution of the green moral concept in supporting the SDG's in the era of the Industrial Revolution 4.0. This research is motivated by various environmental problems that occur today. The environmental damage faced is at least caused by irresponsible human hands. The purpose of this research is to provide a view of the community about the importance of protecting and preserving nature, so that nature can provide benefits for life. The approach used is qualitative with the ethnopedagogical method. The results of the research that the authors obtained are: (1) The process of community development through long-established customs provides a strong philosophical attitude towards being wise towards nature, through the customs of the ceremonies of nyuguh, babarit, and earth alms. (2) In maintaining customs in the midst of the 4.0 Industrial Revolution, by grounding customary values that have noble values, especially in selecting and limiting technologies that are deemed less beneficial to the surrounding community. (3) The concept of SDGs is strongly supported by the Kuta indigenous people, especially in nature conservation. People still uphold the preservation of nature with great respect for their natural environment, this nature is used as the highest value of life for them.
Fundamentos teóricos para una estrategia de conservación y valorización turístico-recreativa de los humedales de Ecuador
Authors: Doumet Chilán Neme Yamil
Published: May 2021

Este trabajo tiene como objetivo central identificar las fundamentaciones teóricas y bases científicas de la planificación y manejo sostenible de los humedales de Ecuador, partiendo de la situación y significación actual de sus ecosistemas y sus problemáticas socioambientales. En primer lugar, se estudian las causas y factores desencadenantes de su deterioro y pérdida de biodiversidad, como los intereses económicos particulares, la escasa sensibilidad y el desconocimiento de su importancia ambiental por parte de los gestores locales y la poca valoración social que aún tienen en muchos territorios. La metodología empleada ha partido de un enfoque cualitativo y en una revisión sistemática de la bibliografía sobre el tema a nivel internacional, así como de información de tipo técnico y documentación oficial relativa a las políticas públicas con incidencia en estos espacios protegidos. Posteriormente se define un marco teórico para el manejo integral de los humedales, considerando también la significación de las actividades turístico-recreativas como herramienta de valorización, gestión y manejo sostenible de estos espacios. Asimismo, se ha establecido una matriz de conceptualización en la que se acotan las principales definiciones y términos sobre los humedales en Ecuador. Para finalizar se analiza la clasificación de estos espacios desde la perspectiva de sus características biológicas y físicas según los lineamientos de la Secretaría de la Convención Ramsar, que establece un total de 30 categorías de humedales naturales y otras 9 de humedales artificiales.

Palabras clave: Turismo; Áreas protegidas; Humedales; Desarrollo sostenible; Marco teórico; Ecuador.
Medición de impactos y planificación turística: ¿tecnología o política?
Authors: Santana Turégano Manuel Angel , Hernández Fernández Nieves Yanira
Published: May 2021

En los últimos años se han desarrollado diversos sistemas de indicadores que pretenden medir los impactos económicos, sociales y ambientales del turismo, y se ha generalizado la idea de que la tarea de las organizaciones que gestionan destinos turísticos debería ser la medición y gestión de estos a través de herramientas como los cuadros de mando. En este contexto, el desarrollo de los destinos inteligentes tiende a considerarse como una forma de organizar la planificación del turismo que permitirá a los gestores tomar mejores decisiones y maximizar el balance entre impactos positivos y negativos. Este artículo presenta un planteamiento teórico surgido de un proyecto que desarrolló un sistema de indicadores para la medición de los impactos del turismo en Canarias a través de una herramienta de visualización de datos, cuya utilidad fue validada por los agentes implicados. Los resultados obtenidos en el proyecto sugieren que los beneficios del uso de herramientas Big Data para la toma de decisiones en la planificación turística podrían depender de la estructura de gobernanza, y que es necesario incrustarlas social y políticamente para que los agentes implicados las vean como instrumentos útiles para tomar decisiones y no como meros dispositivos de imposición de intereses. Palabras clave: impactos del turismo; smart destinations; cuadros de mando; planificación estratégica, estudios de management crítico, Canarias;
Características de la demanda potencia del destino Cuba en la nueva normalidad postcoronavirus
Authors: HERNÁNDEZ FLORES YOAN , SÁNCHEZ BORGES YENNIFER , SALDIÑA SILVERA BISMARIO , RIVES GONZÁLEZ KARLA ANANDA
Published: May 2021

La pandemia generada por el virus SARS-CoV-2 ha provocado graves afectaciones al sector del turismo, influyendo, a gran escala, la gran incertidumbre en los visitantes internacionales a la hora de realizar viajes en el contexto de la nueva realidad. La presente investigación surge ante la necesidad de realizar estudios sobre las preferencias de los viajeros, que en una nueva “normalidad” puedan llegar al destino Cuba para de esta forma ser capaz de brindar un servicio de calidad. Por ello se propone como objetivo general caracterizar la demanda potencial al destino Cuba en la nueva normalidad. Se aplicaron los métodos análisis-síntesis e histórico-lógico como métodos teóricos, así como el análisis documental como método empírico. Como principales resultados se obtuvieron los cambios previsibles en la demanda turística hacia Cuba, relacionadas fundamentalmente, con la decisión de viaje, fecha oportuna, motivaciones, vías de obtención de información, formas de organización del viaje, duración promedio del mismo, así como con las prioridades y medidas de prevención ante el riesgo de contagio.

Palabras clave: turismo, demanda turística potencial, nueva normalidad, post Covid 19, Cuba.
Complementarity between herbaceous and woody plants in providing resources for bees in a semi-arid tropical climate: insights for conservation
Authors: Chamorro Fermín J. , Faria Christiana M.A. , Freitas Breno M. , Araújo Francisca S.
Published: May 2021

The distribution of floral resources in time and space varies according to vegetation strata and to the influence of precipitation and photoperiod on flowering patterns. There are scarce studies jointly investigating the spatio-temporal distribution of plant resources for bees and at the community level, which are critical for planning strategies for their conservation. Here we investigated how herbaceous and woody strata integrate to provide resources (e.g. nectar, pollen, oil) for bees inhabiting fragments of Caatinga dryforest in the northeastern Brazil. We assessed herbaceous and woody strata species composition, abundance and their floral phenodynamics for 18 months in three 0.5-ha plots. We registered bee’s plant visits and collected data on abiotic factors to examine how they correlate to flowering patterns. Bees visited approximately 80% of the plant community, composed by a variety of growth (e.g. trees, shrubs, lianas) and life (e.g. phanerophytes, chamaephytes, hemicryptophytes, and therophytes) forms. Water availability was the main variable correlated to arboreal and herbaceous flowering, but photoperiod also played a role in annual and interannual flowering patterns. Both woody (52%) and herbaceous components (48%) similarly contributed to nectar and pollen supplies, while trees were also a source of resin. Herbaceous life forms flowered sequentially during the rainy season, keeping continuous supply until the beginning of the dry season. While growth forms in the woody stratum provided resources relatively constantly throughout the year. The phenological complementarity between different life and growth forms should be considered in bee conservation strategies, aiming to optimize resource availability throughout the year.
Positive impact of perioperative oral management on the risk of surgical site infections after abdominal surgery: A multicenter retrospective analysis conducted in Japan
Authors: Shimane Tetsu , Koike Kazuyuki , Fujita Shigeyuki , Kurita Hiroshi , Isomura Emiko Tanaka , Chikazu Daichi , Kanno Naomi , Sasaki Keiichi , Hino Satoshi , Hibi Hideharu , Koyama Takahiro , Nakamura Seiji , Nomura Takeshi , Mori Yoshiyuki , Tojyo Itaru , Yamamoto Toshiro , Yamamori Iku , Aota Keiko , Tanzawa Hideki
Published: May 2021

Background: Postoperative surgical site infections (SSI) can be major complications, which can prolong postoperative treatment. Perioperative oral management (POM) was first covered by Japanese national health insurance system in 2012, and patients that are scheduled to undergo major surgical treatment receive dental and oral management during the perioperative period.Objectives: The purpose of the present study was to investigate the ability of POM to prevent perioperative SSI in patients undergoing abdominal surgery.Methods: The patients’ medical records were retrospectively reviewed, and the effects of POM were investigated in a multicenter analysis involving many cases. Detailed information about SSI was assessed and compared between patients with and without POM in univariate and multivariate analyses. Results: In total, the cases of 2,782 patients (1,750 males 1,032 females) were reviewed. Of these, POM was performed in 778 patients (28.0%). Univariate analyses revealed that diabetes mellitus, Eastern Cooperative Oncology Group (ECOG) performance status, the American Society of Anesthesiologists (ASA) classification, the surgical site, the preoperative Prognostic Nutritional Index score, POM, the extent of surgery, the operation time, and the amount of intraoperative blood loss were significantly associated with postoperative SSI (Chi-square or Mann-Whitney U-test, p <0.01). The multivariate analysis revealed that POM had significant preventative effects against postoperative SSI (estimate: -0.245, standard error: 0.080, p <0.01). The surgical site, the ASA classification, and the operation time were also significant and independent clinical predictors of SSI.Conclusion: This study suggests that POM helps to prevent SSI in patients that undergo abdominal surgery.
Removal of methylene blue from aqueous solution by mesoporous silicalite-1 synthetized using carboxymethyl cellulose as template
Authors: Radoor Sabarish , Karayil Jasila , Jayakumar Aswathy , Shivanna Jyothi Mannekote , Parameswaranpillai Jyotishkumar , Siengchin Suchart
Published: May 2021

In the present work, we have developed a mesoporous silicalite-1 using CMC as a template for the removal of MB from aqueous solution. The synthesized silicalite-1 were characterised using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Energy-dispersive X-ray spectroscopy (EDX) and N2 adsorption-desorption isotherm (BET). XRD and FTIR analysis confirmed the formation of crystallinity and development of MFI structure in the mesoporous silicalite-1. The adsorption of MB dye on mesoporous silicalite-1 was conducted by batch adsorption method. The effect of various parameters such as adsorbent dosage, initial dye concentration, contact time and temperature on the dye uptake ability of silicalite-1 was investigated. The operating parameters for the maximum adsorption are silicalite-1 dosage (0.1 wt%), contact time (240 min), initial dye concentration (10 ppm) and temperature (30℃). The MB dye removal onto mesoporous silicalite-1 followed pseudo-second-order kinetic and Freundlich isotherm. The silicalite-1 exhibits 86% removal efficiency even after six adsorption-desorption cycle. Therefore, the developed mesoporous silicalite-1 is an effective eco-friendly adsorbent for MB dye removal from aqueous environment.
Optomechanical Synchronization across Multi-Octaves Frequency Spans
Authors: Rodrigues Caique , Kersul Cauê , Primo André , Lipson Michal , Alegre Thiago , Wiederhecker Gustavo
Published: May 2021

Experimental exploration of synchronization in scalable oscillator micro systems has unfolded a deeper understanding of networks, collective phenomena, and signal processing. Cavity optomechanical devices have played an important role in this scenario, with the perspective of bridging optical and radio frequencies through nonlinear classical and quantum synchronization concepts. In its simplest form, synchronization occurs when an oscillator is entrained by a signal nearby the oscillator's tone, and becomes increasingly challenging as the frequency detuning increases. Here, we experimentally demonstrate entrainment of a silicon-nitride optomechanical oscillator driven several octaves away from its 32 MHz fundamental frequency. Exploring this effect, we perform a 4:1 frequency division from 128 MHz to 32 MHz. Further developments could harness these effects towards frequency synthesizers, phase-sensitive amplification and nonlinear sensing.
Traditional Chinese Medicine Drynariae Rhizoma and Cuscuta Chinensis Suppress Osteoarthritis by Quercetin-AKT1 and Luteolin-IL6/VEGFA Direct Binding
Authors: Huang Xin-Zhou , Chen Hui , Wang Yu-Ming , Zhang Xi-He , Liu Ke-Bin , Huang Kui , Xin Hongwu
Published: May 2021

Background: Drynaria Fortunei and Cuscuta Chinensis are among the most used traditional Chinese medicine herbal prescriptions and have a significant therapeutic effect on osteoarthritis. However, the purpose of this study intends to elaborate the molecular mechanism of action through network pharmacology. The active ingredients of TCM and the potential targets for the treatment of osteoarthritis were selected through the TCMSP, OMIM and Genecards. Results: The 27 components and 85/117 targets of Drynaria Fortunei and/or Cuscuta Chinensis were identified for osteoarthritis. Pharmacological and PPI network analysis identified top 3 active components (kaempferol, luteolin, and quercetin) and core proteins (IL6, AKT1, and VEGFA). GO and KEGG analysis identified the top 3 functions (cytokine and cell/nuclear receptor) and pathways (PI3K-Akt, TNF and IL-17). Molecular docking showed strong binding ability between quercetin-AKT1 and luteolin-IL6/VEGFA. Interaction analysis mapped the quercetin-AKT1 and luteolin-IL6/VEGFA binding to specific hydrogen and hydrophobic bonds. Conclusions: The main active components, common target proteins, functional activities, and signaling pathways of TCM Drynaria Fortunei and Cuscuta Chinensis for the treatment of osteoarthritis were identified by Network pharmacology. We found, for the first time, that drynariae rhizoma and cuscuta chinensis suppress osteoarthritis by quercetin-AKT1/IL6 and luteolin-VEGFA direct binding. Our findings have significant implication for our understanding of the molecular mechanism of action in the treatment of osteoarthritis and future development of osteoarthritis treatment using quercetin and luteolin.
Safety of 0.5% hydrogen peroxide mist used in the disinfection gateway for COVID-19
Authors: Mohanan Parayanthala Valappil , Sangeetha Vijayan , Sabareeswaran Arumugham , Muraleedharan Vayalappil , Jithin Krishnan , Vandana Unnikrishnan , Varsha Sheela Bhasi
Published: May 2021

Hydrogen peroxide (H2O2) is a reactive chemical used in a wide range of applications. Most importantly, it is used for sterilization process in health care environment. In the present study, safety assessment of 0.5% of H2O2or its mist intended to be used in the disinfection gateway for Covid-19 was evaluated. Skin irritation and repeated dose inhalation toxicity studies were carried out in rabbits and rats respectively. Skin irritation study revealed no observable oedema and erythema in rabbits after tropical application of 0.5% H2O2. Wistar rats (both male and female) were exposed (whole body exposure) to0.5% of H2O2 mist, at a concentration of 11.022 (low dose-2 min exposure), 22.044 (medium dose-4 min exposure) and 55.11mg/kg (high dose/high doe recovery-10 min exposure) body weight, daily for seven days. Rats in the high dose recovery group (55.11mg/kg-10 min exposure) were kept for another 7 days without any exposure. A toxicological evaluation was done based on general health parameters, haematology, serum biochemistry, gross necropsy and histopathological data. The results of the study indicated that there was no skin irritation potential induced on exposure of 0.5% of H2O2to rabbits. Similarly, the inhalation toxicity of 0.5% of H2O2 mist, imparts no evidence of haematological, biochemical, gross pathology or histopathological abnormalities in rats. Further, at the laboratory condition stimulated, the NOEL was found to be 55.11mg/kg body weight. Hence, the present study concluded that 0.5% H2O2 or its mist used in the disinfection gateway for COVID-19, failed to induce any skin irritation in rabbits or inhalation toxicity in rats.
Inter-Provincial Responsibility Allocation of Carbon Emission in China to Coordinate Regional Development
Authors: Wang Feng , Ge Xing
Published: May 2021

To establish the carbon emission trading scheme and achieve the carbon emission reduction goals in China, it is critical to allocate the carbon emission allowance (CEA). Using the entropy method and the modified fixed cost allocation model (MFCAM), we calculated the CEA and the carbon emission intensity (CEI) reduction targets of 30 Chinese provinces in 2030, and further classified China’s provinces, from four principles (equity-efficiency-feasibility-sustainability) and three dimensions (economy-society-environment). The results are shown as follows. First, we calculated China's CEA in 2030 is 17567.9 Mt. Second, on the whole, China's southern provinces have higher CEA than northern ones. Eastern China has a larger final CEA than western China and central China. Third, Guangdong has the largest final CEA, due to its large population, developed economy, and high energy utilization efficiency. Fourth, in the future, provinces such as Guizhou, Inner Mongolia, Ningxia, Xinjiang, Shaanxi, and Shanxi will take on greater responsibility for carbon emission reduction, while provinces such as Tianjin, Qinghai, Guangxi, and Beijing will be able to sell carbon emission allowances to other provinces.