bluuebunny/crossref_metadata_2025 huggingface dataset:
The Changes in Ingush Traditional Clothing Under the Influence of Islam (middle of XIX – XXI Centuries)
Authors:   Peter the Great Museum of Anthropology and Ethnography (Cabinet of curiosities), Makka Sultan-Gireyevna Albogachieva
Published: March 2021

The article considers the changes happened in men's and women's clothing under the in-fluence of requirements imposed by Islam. The brief historical information about distribution of Islam among Ingushs is given. The main requirements of an obligatory covering of parts of a body imposed both to women, and to men depending on madhhab are shown. The changes in men's and women's clothes for the last decades are noted. The process of a reislamization left a strong mark on the appearance of inhabitants of the region. During the last historical period (be-fore 90s of the XX century) the traditional clothing did not undergo significant changes, but dur-ing the last decades it changed significantly. Historical continuity of traditions and innovations in clothing is shown in the article. Features of men's and women's clothing characteristic of partici-pants of a ritual zikr are considered. The distinctive features existing in a men's clothing depend-ing on confessional accessory are noted. The author notes that the tradition of designing clothes having deep, century-old roots has been changed and dynamically modified in the new millen-nium in compliance with the inquiries of the population under the influence of Islam.
CRM system and potential customer loyalty trends: Some evidence of customer engagement
Authors:   Department of Computer and Information Systems, Community College, University of Bisha, Bisha, Saudi Arabia, et al. Algamdi
Published: March 2021

This present paper aims to validate the relationship between loyalty programs and to recognize the value of implementing CRM systems by the dimensions of CRM realize and commercial banks. This article also presents an emerging CRM research literature as CRM's customer-focused component, investigating the relationship between CRM and customer loyalty. By implementing robust information management, CRM aims to improve customer interactions through a portfolio of trust-building activities. Simultaneously, most CRM literature focuses on banks designing and executing CRM initiatives. The current research explored various customer loyalty determinants but pay less attention to understanding the relationship between product dimensions and fundamental loyalty mechanisms. The study used both quantitative and qualitative data, focusing on Saudi banks' CRM dimensions and customer loyalty. The Data were collected using surveys and interviews. The finding of this study indicates that the basis of the relationship between the bank and customers is the element of credibility and security privacy and confidentiality of information. However, customer acquisition practiced more than preserving customers (contact, quality of service, market response). Building relationships with them, so the Bank services focused on the retention customers and building relationships with them in the short term, because it is a Less cost, and ameliorate part of customer segmentation actual and potential market of banks on the long term strategy. The study enriches the banking literature on how to implement customer relationship management (CRM) in financial institutions. This topic has not been discussed mainly in the Middle East except in a few studies. Despite the challenges facing banks in light of the spread of Fintech companies and their repercussions on banks operating in the region.
Health Care Students’ Knowledge of and Attitudes, Beliefs, and Practices Toward the French COVID-19 App: Cross-sectional Questionnaire Study (Preprint)
Authors: Montagni Ilaria , Roussel Nicolas , Thiébaut Rodolphe , Tzourio Christophe
Published: March 2021

BACKGROUND

Many countries worldwide have developed mobile phone apps capable of supporting instantaneous contact tracing to control the COVID-19 pandemic. In France, a few people have downloaded and are using the StopCovid contact tracing app. Students in the health domain are of particular concern in terms of app uptake. Exploring their use and opinions about the app can inform improvements and diffusion of StopCovid among young people.

OBJECTIVE

The aim of this study is to investigate health care students’ knowledge of and attitudes, beliefs, and practices (KABP) toward the StopCovid app.

METHODS

A field survey was conducted among 318 students at the health sciences campus of the University of Bordeaux, France, between September 25 and October 16, 2020. A quota sampling method was used, and descriptive statistics and univariate analyses were performed.

RESULTS

Of the 318 respondents, 77.3% (n=246) had heard about the app, but only 11.3% (n=36) had downloaded it, and 4.7% (n=15) were still using it at the time of the survey. Among the 210 participants who had heard about the app but did not download it, the main reasons for not using the app were a belief that it was not effective given its limited diffusion (n=37, 17.6%), a lack of interest (n=37, 17.6%), and distrust in the data security and fear of being geolocated (n=33, 15.7%). Among the 72 students who had not heard of the app and were given a brief description of its functioning and confidentiality policy, 52.7% (n=38) said they would use it. Participants reported that the main solution for increasing the use of the app would be better communication about it (227/318, 71.4%).

CONCLUSIONS

Even among health students, the contact tracing app was poorly used. The findings suggest that improved communication about its advantages and simplicity of use as well as clarifying false beliefs about it could help improve uptake.
A Real-World Rheumatology Registry and Research Consortium: The German RheumaDatenRhePort (RHADAR) Registry (Preprint)
Authors: Kleinert Stefan , Bartz-Bazzanella Peter , von der Decken Cay , Knitza Johannes , Witte Torsten , Fekete Sándor P , Konitzny Matthias , Zink Alexander , Gauler Georg , Wurth Patrick , Aries Peer , Karberg Kirsten , Kuhn Christoph , Schuch Florian , Späthling-Mestekemper Susanna , Vorbrüggen Wolfgang , Englbrecht Matthias , Welcker Martin ,   RHADAR Group
Published: March 2021

UNSTRUCTURED

Real-world data are crucial to continuously improve the management of patients with rheumatic and musculoskeletal diseases (RMDs). The German RheumaDatenRhePort (RHADAR) registry encompasses a network of rheumatologists and researchers in Germany providing pseudonymized real-world patient data and allowing timely and continuous improvement in the care of RMD patients. The RHADAR modules allow automated anamnesis and adaptive coordination of appointments regarding individual urgency levels. Further modules focus on the collection and integration of electronic patient-reported outcomes in between consultations. The digital RHADAR modules ultimately allow a patient-centered adaptive approach to integrated medical care starting as early as possible in the disease course. Such a closed-loop system consisting of various modules along the whole patient pathway enables comprehensive and timely patient management in an unprecedented manner.
Conjugation of Silver Nanoparticles With De Novo–Engineered Cationic Antimicrobial Peptides: Exploratory Proposal (Preprint)
Authors: Hu Alvin
Published: March 2021

BACKGROUND

Cationic antimicrobial peptides have broad antimicrobial activity and provide a novel way of targeting multidrug-resistant bacteria in the era of increasing antimicrobial resistance. Current developments show positive prospects for antimicrobial peptides and silver nanoparticles (AgNPs) individually.

OBJECTIVE

The primary objective is to propose another method for enhancing antimicrobial activity by conjugating AgNPs with cationic antimicrobial peptides, with a subsequent preliminary assessment of the minimum inhibitory concentration of multidrug-resistant bacteria. The secondary objective is to evaluate the safety of the conjugated compound and assess its viability for in vivo use.

METHODS

The proposal involves 3 stages. First, WLBU2C, a modified version of the antimicrobial peptide WLBU2 with an added cysteine group, needs to be synthesized using a standard Fmoc procedure. It can then be stably conjugated with AgNPs ideally through photochemical means. Second, the WLBU2C-AgNP conjugate should be tested for antimicrobial activity according to the Clinical & Laboratory Standards Institute manual on standard minimum inhibitory concentration testing. Third, the cytotoxicity of the conjugate should be tested using cell lysis assays if the above stages are completed.

RESULTS

I-TASSER (iterative threading assembly refinement) simulation revealed that the modified peptide WLBU2C has a secondary structure similar to that of the original WLBU2 peptide. No other results have been obtained at this time.

CONCLUSIONS

The addition of AgNPs to already developed de novo–engineered antimicrobial peptides provides an opportunity for the development of potent antimicrobials. Future prospects include emergency last-line therapy and treatment for current difficult-to-eradicate bacterial colonization, such as in cystic fibrosis, implantable medical devices, cancer, and immunotherapy. As I do not anticipate funding at this time, I hope this proposal provides inspiration to other researchers.

INTERNATIONAL REGISTERED REPORT

PRR1-10.2196/28307
The effect of urban air pollution on mental stress: A nationwide study of university students in China (Preprint)
Authors: Zhang Weifang , Peng Sihui , Fu Jialu , Xu Ke , Wang Hui'hui , Jin Yu , Yang Tingzhong , Cottrell Randall R
Published: March 2021

BACKGROUND

Studies exploring the relationship between air pollution levels and mental stress have rarely been done, and no studies have been done comparing university student mental stress levels based on regional air pollution levels.

OBJECTIVE

The objective of this study was to evaluate the association between air pollution and mental stress among university students.

METHODS

Participants were 11,942 students, who were identified through a multistage survey sampling process conducted in 50 universities. Regional air pollution levels were retrieved from a national database, and mental stress was measured using a perceived stress scale. Both unadjusted and adjusted methods were utilized in the data analyses.

RESULTS

Mental stress prevalence was 36.9% (95% CI: 24.4%–49.5%). The final model indicated that regional air pollution levels were positively associated with students’ mental stress.

CONCLUSIONS

This study provided new and direct evidence of the health hazards of air pollution. The findings underscore the need to develop and implement stringent environmental protection policies, while simultaneously raising public awareness of environmental protection.

CLINICALTRIAL

NONE
Solução energética híbrida com armazenamento por bombagem
Authors:   CERIS, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal, Ramos Helena M. , Simão Mariana
Published: March 2021

A elevada intermitência das fontes de energia renováveis condiciona a produção de energia elétrica, que continua a depender muito dos combustíveis fósseis. Uma vez que existe complementaridade por parte das fontes de energia renováveis, a sua integração conjunta é, sem dúvida, a melhor solução para reduzir esta dependência. Aliado a este facto, poderá coexistir um sistema de armazenamento por bombagem, capaz de gerar reservas hídricas, que serão aproveitadas quando a procura exceder a oferta energética. Procedeu-se ao desenvolvimento de dois modelos: um sobre custos de turbomáquinas e outro que visa o estudo do potencial de recuperação de energia de uma solução energética híbrida com armazenamento por bombagem combinado com fonte de energia eólica. Foram estudadas diferentes combinações para estas duas fontes de energia renovável, analisando o consumo satisfeito e a energia eólica não consumida, tendo-se concluído que o excedente de energia eólica pode ser aproveitado para bombagem. The high intermittence of renewable energy sources determines the production of electricity, which remains highly dependent on fossil fuels. Since there is complementarity between renewable energy sources, their joint integration is a potential solution to reduce this dependency. Consequentially, a pumping storage system capable of generating water reserves can coexist, which will be used when demand exceeds the energy supply. Two models were developed: one based on turbomachinery costs and the other based on the potential of energy recovery of a hybrid energy solution with pump storage combined with wind energy. Different combinations were studied for these two sources, analysing the satisfied consumption and the wind energy that is not consumed, in which it was concluded that the surplus of wind energy can be used by pumped storage.
Consumo de energia nos serviços urbanos de água em Portugal Continental. Resultados 2004-2017
Authors:   Laboratório Nacional de Engenharia Civil, Departamento de Hidráulica e Ambiente, Núcleo de Engenharia Sanitária, Silva Catarina , Loureiro Dália , Mamade Aisha , Marabuto Manuel , Rosa Maria João
Published: March 2021

Nos serviços urbanos de água, os gastos com energia podem corresponder a 25-40 % dos gastos operacionais das entidades gestoras destes sistemas. O projeto AVALER+ pretende avaliar e melhorar o desempenho energético dos sistemas de abastecimento de água (SAA) e dos sistemas de águas residuais (SAR). A avaliação da situação de referência do consumo e eficiência energética é determinante para previsão da sua evolução, estabelecimento de metas e avaliação do impacto das medidas de melhoria. Este artigo apresenta a metodologia e os resultados do consumo e eficiência energética do setor urbano da água em Portugal, entre 2004 e 2017. Os dados analisados demonstram um aumento do consumo anual de energia no setor nos últimos 7 anos. Em 2017, o consumo total apurado foi de 1,1 TWh, 62 % nos SAA e 38 % nos SAR. Nos SAA, o principal consumo de energia ocorreu no bombeamento para captação, transporte e distribuição de água (89 % em média), que nos SAR representou, em média, 21 %. O desempenho energético das instalações elevatórias foi insatisfatório ou mediano, quer nos SAA (mediana variando entre 0,55 e 0,58 kWh/(m3.100 m) em 2012 e em 2015/2017, respetivamente; valor de referência máximo 0,54 kWh/(m3.100 m)), quer nos SAR (mediana variando entre 0,64 e 0,88kWh/(m3.100m) em 2012 e 2015, respetivamente; valor de referência máximo 0,68 kWh/(m3.100 m)). Os resultados evidenciam que existe um elevado potencial de melhoria de eficiência energética. In urban water services, the energy costs may correspond to 25-40 % of operational costs. AVALER+ project aims to assess and improve the energy performance of water supply systems (WSS) and wastewater systems (WWS). An assessment of the baseline of the energy consumption and efficiency is crucial for predicting its evolution, setting targets and assessing the impact of the improvement measures. This paper presents the methodology and the results of energy consumption and efficiency of the urban water sector in Portugal, between 2004 and 2017. The data analysed show an increase in annual energy consumption in the sector, in the last 7 years. In 2017, the total energy consumption was 1.1 TWh, 62 % in WSS and 38 % in WWS. In WSS, the main energy consumption was the pumping water abstraction, transport and distribution (89 % on average), which represented 21 % (on average) in WWS. The energy performance of pumping stations has been unsatisfactory or acceptable both in WSS (median ranging between 0.55 and 0.61 kWh/(m3.100 m) in 2012 and 2015/2017, respectively; maximum reference value 0.54 kWh/(m3.100 m)) and in WWS (median 0.64 to 0.88 kWh/(m3.100 m) in 2012 and 2015, respectively; maximum reference value 0.68 kWh/(m3.100 m)). The results show a high potential for energy efficiency improvement.
Avaliação do ciclo de vida de um sistema de gestão de RSU em uma região metropolitana
Authors:   Escola de Engenharia Elétrica, Mecânica e de Computação (EMC), Universidade Fede- ral de Goiás, Goiânia, Goiás, Brasil, Colvero Diogo Appel , Gomes Ana Paula , Matos Manuel Arlindo , Tarelho Luís António , Ramalho José
Published: March 2021

No Brasil existem regiões metropolitanas com grandes adensamentos populacionais, reflexo do grande fluxo migratório que ocorreu no país a partir da década de 1970. Dentre as consequências destes quantitativos populacionais nas áreas urbanas está o aumento da geração per capita de resíduos sólidos urbanos (RSU), que na maioria dos casos, vem associado à deficiente gestão dos RSU. Um exemplo são 19 municípios do Estado de Goiás, Brasil, em que 73% dos RSU produzidos tem destino inadequado. Para minimizar os impactos ambientais, os municípios brasileiros devem implementar um sistema de gestão de RSU (SGRSU) com valorização e desvio de RSU dos aterros. Diante disso, utilizando-se uma ferramenta de avaliação do ciclo de vida, fez-se uma avaliação ambiental de diferentes alternativas para um SGRSU partilhado entre 19 municípios de Goiás. Os resultados apontaram que o cenário atual da gestão dos RSU nestes municípios tem os maiores impactos ambientais em sete das 12 categorias de impacto avaliadas, dentre elas o potencial de aquecimento global. Em contrapartida, o SGRSU proposto, com a sede situada no município de Aparecida de Goiânia, contempla a digestão anaeróbia e maximiza o desvio de RSU dos aterros. Neste SGRSU obteve-se as menores emissões ao ambiente em oito das categorias de impacto analisadas. In Brazil, there are metropolitan regions with large populations, reflecting the great migratory flow that has occurred there since the 1970's. Among the consequences of this urban population rise in is the increase of municipal solid waste (MSW) per capita generation. This is mostly associated with poor MSW management. For example, 19 municipalities in Goiás State, Brazil, inappropriately dispose of 73% of their produced MSW. To minimize environmental impacts, Brazilian municipalities must implement an MSW management facility (MSWMF) with MSW recovery and diversion from landfills. Therefore, using a life cycle assessment tool, an environmental analysis of different alternatives was made to a MSWMF shared among these 19 municipalities of Goiás. The results showed that the current MSW management scenario in these municipalities has the greatest environmental impacts in seven of the 12 evaluated impact categories, among them global warming potential. Conversely, the proposed MSWMF, with its headquarters in the municipality of Aparecida de Goiânia, contemplating anaerobic digestion and maximizing MSW diversions from landfills, has the lowest emissions to the environment in eight of 12 impact categories.
Impacto de afluências indevidas no consumo energético em instalações elevatórias em sistemas de drenagem urbana
Authors:   Laboratório Nacional de Engenharia Civil, Núcleo de Engenharia Sanitária, Lisboa, Portugal, Jorge Catarina , Almeida Maria do Céu , Covas Dídia
Published: March 2021

As afluências indevidas são identificadas como um dos principais problemas dos sistemas de águas residuais e pluviais, levando a diversos problemas de desempenho dos mesmos, como sejam a ocorrência de inundações, a diminuição da eficiência hidráulica e energética, entre outros. A atuação no controlo de afluências indevidas perspetiva oportunidades de melhoria do desempenho em várias dimensões incluindo a componente de eficiência energética. Neste artigo desenvolve-se esta temática numa perspetiva de avaliação do desempenho de instalações elevatórias (IE) embora considerando o sistema como um todo. A metodologia adotada consiste em efetuar a análise de sensibilidade de um sistema separativo de águas residuais para cenários de ocorrência de afluências indevidas à rede, de modo a avaliar o impacto no consumo de energia e noutras variáveis relevantes do sistema. O caso de estudo utilizado consiste numa adaptação do caso de estudo real correspondente ao sistema de drenagem de águas residuais da Bacia da Venteira, Amadora. A finalidade é aferir uma abordagem para tratar esta temática de modo mais geral com base no caso de estudo referido, de forma a contribuir para a sensibilização para a adoção de metodologias operacionais e de monitorização que permitam ter dados para fazer uma gestão mais racional da energia nestes sistemas. As conclusões são genericamente aplicáveis a qualquer sistema separativo de águas residuais. Undue inflows are identified as one of the main problems in wastewater and stormwater systems, leading to several performance issues, such as flooding, decreased efficiency in water and energy use, among others. Acting in the control of undue inflows leads to performance enhancements in several dimensions including the energy efficiency component. This paper presents developments regarding performance evaluation of pumping stations, although considering the system as a whole. The proposed methodology consists of adopting a sensitivity analysis for a separate wastewater system, considering scenarios of undue inflows occurrences in the network, in order to evaluate the impact on energy consumption and other relevant variables of the system. The case study presented herein is adapted from a real life case study corresponding to the Venteira's domestic separate system (located at Amadora, Portugal). The main purpose is to assess an approach to address this issue, in order to contribute to increase awareness for the adoption of operational and monitoring methodologies to contribute for a more rational energy management in these systems. The conclusions are generally applicable to separate wastewater systems.
ANALYSIS OF THE MICRO-ENVIRONMENT OF «ATIK-MOTORS» LLC
Authors:   M.A. Lankina Amur State University, Lankina M.A. , Vasilieva A.V. ,   A.V. Vasilieva Amur State University
Published: March 2021

The article analyzes the immediate environment of «Atik-Motors» LLC, an authorized «Toyota» service center
STATISTICAL ANALYSIS OF THE NUMBER OF HOTELS IN THE AMUR REGION AND CHINA FOR 2015 - 2019
Authors:   D.V. Serzhantova Amur State University, Serzhantova D.V. , Rybakova L.V. ,   L.V. Rybakova Amur State University
Published: March 2021

The article provides a statistical analysis of the number of hotels in the Amur Region and the People's Republic of China
RESEARCH ON THE RESEARCH AND DEVELOPMENT COUNTERMEASURES OF PINDUODUO'S «BIG AGRICULTURE» FARM GAME UNDER THE BACKGROUND OF THE HOME ECONOMY
Authors:   RONG CHENG Heihe University, CHENG RONG , XU HAI ,   HAI XU Heihe University, LIN SHU ,   SHU LIN  Harbin Institute of Technology
Published: March 2021

Since the outbreak of the novel coronavirus pneumonia virus, China has been in a state of home consumption, and Pinduoduo's games have become a popular target for many audiences. Among them, the click-through rate of Happy Orchard and Happy Ranch has increased sharply. However, as the time spent in closed homes increases, Consumers have a sense of burnout, and there is also a certain sense of distortion for game development. In order to make the consumer's home more interesting, the software developed by game developers is more meaningful. It is proposed that Pinduoduo is happy in the context of the “home economy” of the epidemic. Development strategies for farming (forestry, animal husbandry, sideline, fishing grounds) games.
A HISTORICAL OVERVIEW OF THE TOURISM DEVELOPMENT IN ANCIENT CHINA
Authors:   I.Р. Monich Nanning Normal University, Monich I.Р. , Gonin V.N. ,   V.N. Gonin Transbaikal State University
Published: March 2021

The purpose of this article is to explorer the development of tourism in China in a broader context, examining the evolution in different periods and the main factors that influenced it. The article identifies four groups of travellers and shows their influence on the tourism development in the corresponding period: Scholars, Royal Families and the Military, Traders, Buddhists. The periods of the Tang and Ming dynasties are covered in the article.
Deep Disagreement and Patience as an Argumentative Virtue
Authors: Phillips Kathryn
Published: March 2021

During a year when there is much tumult around the world and in the United States in particular, it might be surprising to encounter a paper about patience and argumentation. In this paper, I explore the notion of deep disagreement, with an eye to moral and political contexts in particular, in order to motivate the idea that patience is an argumentative virtue that we ought to cultivate. This is particularly so because of the extended nature of argumentation and the slow rate at which we change our minds. I raise a concern about how calls for patience have been misused in the past and argue that if we accept patience as an argumentative virtue, we should hold people in positions of power, in particular, to account.
Some Limits to Arguing Virtuously
Authors: Bowell Tracy
Published: March 2021

In this paper, I consider whether there are limits to virtuous argumentation in certain situations.  I consider three types of cases: 1) arguing against denier discourses, 2) arguing with people who make bigoted claims, and 3) cases in which marginalised people are expected to exercise virtues of argument from a position of limited agency. For each type of case, I look at where limits to arguing responsibly might be drawn. I argue that there are situations in which we might withdraw from engagement for practical reasons and others in which withdrawing or refraining from engagement is a responsible way to deal with a particular position. Finally, I argue that in the third type of case, expecting the marginalised to argue as though on even terms with the positions of the dominant risks perpetrating argumentative harm.
Causality study between electricity consumption and economic growth in Lebanon
Authors:   Laboratoire de recherche ART-Dev, Économie d’énergie, Faculté d’Economie, Université de Montpellier, France, nour.wehbe@umontpellier.fr, Wehbe Nour , Assaf Bassam ,   Faculté d’Agronomie, Université Libanaise, Dekweneh, Liban, Darwich Salem ,   Faculté d’Agronomie, Université Libanaise, Dekweneh, Liban
Published: March 2021

This article studies the causal relationship between electricity consumption and economic growth in Lebanon over the period 1971-2012. This relationship is examined using cointegration and Granger causality tests. The results of the estimates indicate that economic growth and electricity consumption in Lebanon are not cointegrated and that there is no causal relationship between variables according to Granger’s tests. However, a unidirectional causality is detected in the post-war period (1990-2012), ranging from electricity consumption to economic growth. The results of this research prove strongly, and with an econometric approach, that electricity consumption was the fundamental sourceof economic growth after the civil war in Lebanon, which explains the appearance of this causal relationship. In addition, the most relevant implication of this study is that mitigation of current power generation shortages should be a national priority, given its potential positive effect on the Lebanese economy.
Taxonomy and antimicrobial activity of streptosporangium strain SG163 isolated from a Saharan soil
Authors:   Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria., Bouti K. , Boudjella H. ,   Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria., Bouras N. ,   Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria.,   Département de Biologie, Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre, Université de Ghardaïa, BP 455, Ghardaïa 47000, Algeria, Zitouni A. ,   Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria., Mathieu F. ,   Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse,France, Sabaou N. ,   Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria.
Published: March 2021

n a continuing search fornew antimicrobial products from actinobacteriacollected in Algerian Saharan soils, an isolateof actinobacteria,designated Sg163, was selected for its interesting antimicrobial activity.The isolate wasidentified to the genus Streptosporangium by phenotypicand molecular criteria. The cultural and physiological characterizations as well as phylogenetic analysis indicated that the isolate was different from known members of the genus Streptosporangium. Analysis of the 16S rRNA sequence showed 97.09to 98.27% similarity with those of Streptosporangium type strains. The strainSg163 produced antifungal and antibacterial activities on several culture media. The highest antimicrobial activities were obtained in ISP2 medium. Three active products C1, C2 and C3 with both antifungal and antibacterial activities were isolated and purified by chromatographic methodswith C2, as the major compound. The data of the infraredspectroscopy andthe chemical revelations, suggested that the active molecules were glycosylatedaromaticcompounds.
Evaluation du potentiel productif des exploitations agricoles dans les monts de Tlemcen (nord-ouest de l’Algérie)
Authors:   Université de Tlemcen. Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre et de l'Univers. Département d’Agronomie. Rocade 2, BP N° 119. Tlemcen (Algérie), Hattab M. , Gaouar A. ,   Université de Tlemcen. Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre et de l'Univers. Département d’Agronomie. Rocade 2, BP N° 119. Tlemcen (Algérie)
Published: March 2021

La population montagnarde algérienne reste tributaire surtout d’une agriculture fragile. À cet effet, le présent travail consiste à effectuer une évaluationapprofondiede la situation actuelle des exploitations agricoles, qui sont fortement fragilisées par différentes contraintesdans les monts de Tlemcen, afin d’évaluer leur potentiel productif. Les résultats obtenus ont montréque les exploitations enquêtées quoiqu’elles appartiennent à un même ensemble montagneux, elles se distinguent par des particularités différentes d’une région à une autre. Certaines exploitations sont orientées vers le modeld’exploitation familiale à cause de leur morcellement répété et du manque de main d’œuvre salariée. D’autres exploitations sont obligées de développer une stratégie de survie basée essentiellement sur une céréaliculture extensive combinée surtout avec l’élevage ovin. Dans l’ensemble, les moyens de production actuels de toutes les exploitations enquêtées sont insuffisants pour qu’elles puissent résister au climat irrégulier, à la configuration difficile des terrains et aux fluctuations du marché.
Identification of chemical compositions in some medicinal plants by GC/MS analysis
Authors:   Department of biotechnology, Faculty of agriculture, Buali Sina University, Hamadan, Iran, Mohammadi S. , Piri Kh. ,   Department of biotechnology, Faculty of agriculture, Buali Sina University, Hamadan,Iran, Dinarvand M. ,   Department of biology, Faculty of science, Ferdowsi University of Mashad, Iran
Published: March 2021

Medicinal plantsused in treatment of diseases earlier times, are potential sources of new drugs. In this study, chemical compositions of Echium khuzestanicum, Marrubium anisodan and Echinops cephalotes were identified by Gas Chromatography-Mass Spectrometry(GC/MS).M.anisodanand E.cephalotes aerial organs and E.khuzistanicum flowers were extracted by maceration method. According to the results, 46 kinds of chemical compounds found in methanol extract of E.khuzestanicum. There are mucilage, fatty acids, flavonoid and diterpenes in the flower of E.khuzestanicum. Seventy sixkinds of chemical compounds were found in methanol extract of E.cephalotesincludingaldehydes (7.9%), phenols (7.5%), fatty acids (5.8%) and furfural (5.4%)and86 kinds of chemical compounds found in M.anisodan extract. Furfural, steroids, vitamin B and flavonoids are the main compounds of M.anisodan.
Comparison of corrosion behaviour of copper and copper alloys in aqueous chloride solution
Authors: Gudic Senka , Vrsalovic Ladislav , Radeljic Ana , Oguzie Emanuel , Ivanic Ivana , Kozuh Stjepan , Gojic Mirko
Published: March 2021

A comparative corrosion study of Cu and Cu-Al, Cu-Al-Ni, Cu-Al-Mn and Cu-Al-Mn-Ni in 0.5 mol dm-3 NaCl solution was performed using an open circuit potential, potentiodynamic polarization and electrochemical impedance spectroscopy measurements (EIS). Scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS) analysis was used to evaluate corrosive damage on the sample surface after polarization measurements. The reported results suggest that the alloying elements have reduced cathodic and anodic current densities in the Tafel region, increased anodic currents at higher anodic potentials, and slightly displaced corrosion potential towards more positive values. Overall, impedance increased in the following order: Cu < Cu-Al < Cu-Al-Ni < Cu-Al-Mn < Cu-Al-Mn-Ni. This indicates that Cu alloys possess better corrosion resistance. SEM and EDS analysis after polarization measurements showed uniform dissolution of pure Cu, as well as the presence of a surface oxide layer, consisting of a mixture of the corresponding alloying elements, on all investigated alloys. Aggressive anodic polarization severely damaged the barrier layers on the Cu alloy specimens.
Flame-weeding: Impact on soybean plants and soil microorganisms
Authors: Malencic Djordje , Malidza Goran , Rajkovic Milos , Kiprovski Biljana , Djuric Simonida , Petrovic Kristina , Krstic Jovana
Published: March 2021

Flame-weeding is a very useful method for weed control, especially in organic
production where the use of herbicides is prohibited. With this method heat
sup?presses weeds in row within a second. Apart from this, heat also affects
growing crop plants and surrounding soil. The aim of this paper was to
determine the effect of different propane doses, on photosynthetic and
polyphenolic (total flavonoids and anthocy?nins) pigments in soybean leaves,
as well as the number of microorganisms in the soil. Soybean plants exposed
to flame showed a different reaction to high temperature stress, which was
reflected in differ?ent content of analyzed biochemical parameters, but the
most responsive were anthocyanins. Actinomycetes turned out to be the most
sensitive group of soil microorganisms affected by weed flaming, while fungi
were the most tolerant.
Biological spectrum of the weed flora in the Vrsac vineyards (Serbia)
Authors: Andjelkovic Ana , Marisavljevic Dragana , Cvijanovic Dusanka , Radulovic Snezana , Pavlovic Danijela
Published: March 2021

Agrotechnical measures are the main factor defining the vineyard weed flora
structure and composition, while adequate weed control measures
simultaneously ensure that vineyards are being well-managed, thus securing
good grapevine health and high quality of wine. Given that the biological
spectrum of weeds affects the choice of weed control measures, the aim of
this study was to determine the biological properties of the weed flora in
Vrsac vineyards, by assessing dominant life forms and phenology of the
identified weeds. The floristic analysis was conducted during the 2016
vegetation season (March-November) at 60 plots (1 m2), at three field sites.
The presence of 97 plant taxa, belonging to 26 families, was determined. The
biological spectrum of the vineyards weed flora has shown a
thero?phyto-hemicryptophyte character (therophytes: 57.73% and
hemicryptophytes: 34.02%). The scapose herbaceous plants with
summer-flowering phenology were dominant within the therophytes and
hemicryptophytes. The obtained results have shown a higher weed diversity in
vineyards, when compared to previous research of the weed flora in the study
area, but similar to more recent studies conducted in the neighbouring
countries. Furthermore, the dominant presence of therophytes in the vineyard
weed flora was expected, bearing in mind the primarily mechanical weed
control measures traditionally applied in vineyards.
Persepsi Siswa SMA Selama Pembelajaran Daring Saat Pandemi Covid-19
Authors: Sembiring Anastasia Br , Oktavianti Roswita
Published: March 2021

The Coronavirus Disease (Covid-19) pandemic has a huge impact in every aspects of people's lives. One of the aspects is education. Currently, educational institutions are implementing online learning.  This research is about the issue of high school students' perception about online learning during the Covid-19 Pandemic. This research uses qualitative research with a case study method. The techniques used for data collection is interview. The  subjects of this research are students of SMA Santa Maria Medan based on their grade level. In this research, the researcher conduct an interview. The results showed that students of SMA Santa Maria Medan experienced difficulties during online learning. The difficulties faced is that high school students are required to independently understand the lessons that have been explained by the teacher, besides that unstable network is also considered as one of the factors that creates misunderstanding (miss communication) of the meaning received by students.  Students also find it so hard to interact with other students during online learning and students are not feeling motivated because the teacher learning system only provides material and assignments that absolutely makes students tired and bored of learning.Pandemi Coronavirus Disease (Covid-19) menyebabkan dampak yang begitu besar bagi seluruh aspek kehidupan masyarakat salah satunya pendidikan. Pemerintah menerapkan aturan pembelajaran jarak jauh secara dalam jaringan (daring) pada seluruh sekolah untuk mencegah penyebaran virus corona. Pembelajaran daring ini membentuk persepsi yang berbeda bagi setiap peserta didik. Persepsi adalah kemampuan otak dalam menerjemahkan stimulus atau proses untuk menerjemahkan stimulus yang masuk ke dalam alat indera manusia. Penelitian ini mengangkat persoalan mengenai persepsi siswa SMA selama pembelajaran daring saat pandemi Covid-19. Penelitian ini menggunakan pendekatan kualitatif dengan metode studi kasus. Studi kasus penelitian ini dilaksanakan di SMA Santa Maria Medan. Pengumpulan data menggunakan teknik wawancara. Subyek penelitian adalah siswa SMA Santa Maria Medan. Objek penelitian adalah persepsi siswa SMA selama pembelajaran daring saat pandemi Covid-19. Wawancara dilaksanakan melalui konferensi video. Hasil penelitian menunjukkan bahwa persepsi siswa SMA selama pembelajaran daring saat Pandemi Covid-19 adalah bahwa pembelajaran daring yang dilaksanakan selama pandemi tidak efektif. Siswa SMA dituntut untuk mandiri memahami pelajaran yang telah dijelaskan oleh guru. Selain itu, masalah jaringan menjadi faktor utama dalam kesalahpahaman makna yang diterima oleh siswa. Siswa juga jarang berinteraksi dengan siswa lainnya selama pembelajaran daring. Siswa merasa tidak memiliki motivasi karena sistem pembelajaran di mana guru hanya memberikan materi dan tugas yang membuat siswa jenuh.
Pengaruh Umur Mata Tunas Bud Set Tebu (Saccharum offiinarum L) Varietas VMC 86-550 dan Perendaman Air Kelapa Terhadap Pertumbuhan Bibit Tebu
Authors:   Politeknik Negeri Jember, Mawardi Mohammad Haris , Harlianingtyas Irma ,   Politeknik Negeri Jember
Published: March 2021

Tebu merupakan salah satu komoditi tanaman penghasil gula terbesar di dunia dimana kebutuhan tebu sebagai bahan utama penghasil gula akan terus meningkat seiring bertambahnya jumlah penduduk, namun hingga tahun 2012 ketersediaan gula dalam negeri masih tidak mampu untuk mencukupi kebutuhan gula masyarakat indonesia yang rata-rata mengkonsumsi gula 17 kg per kapita per tahun, kebutuhan ini masih di penuhi dari impor. Maka di butuhkan langkah-langkah khusus untuk menanggulangi hal tersebut, salah satunya pada sistem pembibitan di budidaya tebu. Pada kegiatan ini penggunaan varietas unggul VMC 86-550, pemilihan umur mata tunas, dan perendaman bahan tanam dengan air kelapa sebagai ZPT alami diberikan untuk mengoptimalkan pertumbuhan awal tanaman tebu. Dari pengaplikasian keduanya, umur mata tunas maupun perendaman air kelapa sama-sama memberikan pengaruh nyata pada beberapa parameter di beberapa pengamatan, akan tetapi tidak di temukan adanya interaksi dari kedua perlakuan tersebut.
Pengaruh Cara Perbanyakan Vegetatif Terhadap Pertumbuhan Kopi Robusta (Coffea canephora) Klon BP 308 dan BP 534
Authors:   Universitas Islam Madura, Awidiyantini Ruly , Nurmalasari Yanti ,   Universitas Islam Madura
Published: March 2021

Tanaman kopi (Coffea sp) merupakan komoditas penting yang permintaan setiap tahunnya meningkat. Perbanyakan tanaman kopi yang mudah dan murah adalah dengan setek dan setek sambung. Setek sambung tanaman kopi merupakan cara perbanyakan vegetatif yaitu sambungan antara dua klon yang mempunyai keunggulan berbeda. Untuk mengetahui metode setek dan setek sambung yang terbaik dengan menggunakan bahan tanam ruas dan sayat/belah. Penelitian yang telah dilakukan dengan tujuan untuk mendapatkan metode pembiakan vegetatif ( setek dan setek sambung)terbaik dan membandingkan dari beberapa cara pembiakan pada tanaman kopi robusta (Coffea canephora) . Penelitian di laksanakan di kebun Percobaan Mandiri mulai bulan Juli sampai September 2018 dan selanjutnya di lakukan pengamatan dalam laboratorium. Penelitian menggunakan Rancangan Acak Kelompok (RAK) dengan 7 perlakuan dan 3 ulangan di lanjutkan dengan Uji Jarak Berganda Duncan 5%. Perlakuan A merupakan perlakuan setek sambung batang bawah ruas klon BP 308 dan batang atas ruas klon BP 534, perlakuan B merupakan setek sambung batang bawah ruas klon BP 308 dan batang atas belah klon BP 534, perlakuan C merupakan setek sambung batang bawah belah klon BP 308 dan batang atas belah klon BP 534, perlakuan D merupakan setek ruas klon BP 308, perlakuan E merupakan setek ruas klon BP 534, perlakuan F merupakan setek belah klon BP 308, dan perlakuan F setek belah klon BP 534. Hasil penelitian menunjukkan setek sambung batang bawah klon BP 308 dan batang atas ruas klon BP 534 (A)merupakan hasil terbaik, setek ruas klon BP 308 (D) lebih baik daripada setek ruas klon BP 534.
Fake News, desordem informacional e pânico moral
Authors: Gonçalves-Segundo Paulo Roberto
Published: March 2021

Meu objetivo, neste artigo, é discutir o funcionamento sociossemiótico de fake news que reproduzem pânicos morais, considerando o contexto de polarização sociopolítica vigente no Brasil contemporâneo. Para isso, buscarei, em primeiro lugar, dialogar com a vasta literatura multidisciplinar sobre o tema, dando especial atenção à noção de desordem informacional. Em segundo lugar, a partir do arcabouço sociossemiótico, discutirei a minha hipótese de que essa modalidade de fake news consiste em um ponto de tensão entre o absurdo e o evidente. Para evidenciar tal hipótese e sistematizar um conjunto de estratégias discursivas que parecem relevantes na caracterização de tipos de desordem informacional, em especial, do vazamento, do contexto falso e do conteúdo manipulado, analisarei um vídeo produzido e publicado por uma youtuber conservadora, apoiadora da gestão Bolsonaro, que denuncia uma apostila supostamente elaborada pela Secretaria Municipal de Educação de Fortaleza, cidade gerida por um governo de esquerda, que objetivaria naturalizar o contato íntimo e sexual entre adultos e crianças, incentivar a masturbação infantil e ridicularizar a ministra Damares Alves, ela mesma vítima de violência sexual. Como resultado, posso arrolar: a detecção de uma estratégia discursiva geral – a ‘ubiquidade do exogrupo’ –, que parece fundamental para essa modalidade de fake news; ademais, caracterizam o vazamento as estratégias de ‘simulacro de diálogo com o endogrupo’ e ‘o uso de imagens como evidência’; em termos de falso contexto, os processos de ‘desancoragem espaço-temporal’, ‘transferência de responsabilidade enunciativa’ e ‘reconfiguração situacional’ se mostraram relevantes; e, por fim, em relação ao conteúdo manipulado, foram centrais a ‘diluição de fronteiras espaciais’ e a ‘adição de propósito imoral/criminoso’.
The cytotoxic effect of Synadenium grantii extract against human lung carcinoma A549 cells and its role in improvement of histopathological and biomarkers changes in Benzo(a)pyrene-induced lung cancer in rats
Authors: Mamdouh Moawad Ali  , Mahmoud Khattab  , Mie Afify Mohamed  , Rania Mohsen Abdelsalam  , Khaled Mahmoud  , Saeed Soliman  , Mohamed Fawzy Barghash
Published: March 2021

Lung cancer is one of the most lethal cancers which is causing up to 3 million deaths annually worldwide. Therefore, management of lung cancer needs searching for new chemopreventive agents. This work was designed to inspect the chemopreventive potential of different extracts prepared from branches and leaves of Synadenium grantii for screening their effects on lung cancer cells (A549), then the most active extract was used for combating lung cancer induced in animal model. The in vitro results showed that, the methanolic extract was the most active extract against A549 cells with a notable cytotoxicity activity (IC50: 4.30±0.44 µg/ml), which was close to the activity of standard drug, doxorubicin (IC50: 3.50±0.40 µg/ml). The results of the in vivo  experiment, revealed that in B(a)P-treated group, aspartate (AST) and alanine (ALT) transaminase activities as well as the levels of urea, creatinine, alpha-fetoprotein (AFP) and Phosphotylinosital 3 Kinase (PI3K) were significantly increased comparing to control group. However, treatment with S. grantii  ameliorated the increase in these parameters in both after- and before-treatment groups comparing with B(a)P-treated group. This improvement in biochemical results were also supported by improving in morphological and histopathological injuries induced by B(a)P, which indicated that methanolic extract of S. grantii  has a chemoprevention effect on lung cancer.
Overcoming the Critical Barriers to Implementing Sustainable Concept in Kuwait Cement Manufacturing.
Authors: AlSanad Shaikha
Published: March 2021

Nowadays, the sustainability has become a driver for effectiveness in essentially all manufacturing sectors. Furthermore, this concept has become crucial to research and business practice since of prompt depletion of disquiets over affluence inequality and natural resources and corporate social responsibility. As the interest in sustainable development grows, the cement industry essential be able to support sustainable development, environmentally responsibility, balancing economic prosperity, social equity. Cement is a vital construction material and a strategic commodity in the construction sector. Nevertheless, the cement industries are facing challenges to implement sustainable manufacturing into their products and processes. This paper is seeks to address and examine the barriers and challenge toward the sustainable manufacturing supposed to be suitable to the cement industry from the perspectives of the construction stakeholders. Accordingly, study data was collected through a semi structure questionnaire survey of randomly selected professionals in cement factory in Kuwait. The output results demonstration that crucial barriers towards practices of sustainable cement factory for instance shortage of local environmental regulations, Inadequate regulation support, political decision makers, and clients, lack of strategy to promote sustainable construction, and lack of environmental awareness by the industry.
Computational Seismic Analysis of Dry-Stack Block Masonry Wall
Authors: Khan Irfan , Gul Akhtar , Shahzada Khan , Khan Nisar Ali , Rehman Faisal Ur , Samiullah Qazi , Khattak Muhammad Arsalan
Published: March 2021

In this research the computational modeling of Dry-Stack Block Masonry (DSM) walls subjected to cyclic monotonic loading testing is done. The analytical results were compared with experimental test results of the unreinforced and unconfined DSM cantilever walls subjected to lateral loading along with a constant axial load. ABAQUS has been used for Finite Element Modeling and analysis of the wall. Various material properties are defined for the wall in the software and modeled as a homogeneous material. The proposed numerical models had a good correlation with the experimental data. The test results discussion includes failure moods, load displacement curves, and stress/strain profile. Doi: 10.28991/cej-2021-03091668 Full Text: PDF