bluuebunny/crossref_metadata_2025 huggingface dataset:
Los síndicos aplicadores del Derecho del Reino de Navarra (1530-1829)
Authors: Alli Aranguren Juan-Cruz
Published: June 2024

Se estudia la función y régimen de los síndicos de las Cortes del Reino de Navarra y su Diputación, que fueron sus operadores jurídicos. Participaban en la redacción y recopilación de los fueros, leyes y ordenanzas, dictaminaban y gestionaban ante la autoridad real las reparaciones de contrafueros, agravios y quebrantamiento de leyes, formalizaban su funcionamiento interno y opinaban sobre cuantas cuestiones les fueran consultadas. La progresiva institucionalización fue precisando desde el siglo XVI al XIX su régimen en cuanto a facultades, retribuciones, incompatibilidades, honores y distinciones.
Note for the Beal's Conjecture
Authors: Vega Frank
Published: June 2024

This work explores two famous conjectures in number theory: Fermat's Last Theorem and Beal's Conjecture. Fermat's Last Theorem, posed by Pierre de Fermat in the 17th century, states that there are no positive integer solutions for the equation $a^{n} + b^{n} = c^{n}$, where $n$ is greater than $2$. This theorem remained unproven for centuries until Andrew Wiles published a proof in 1994. Beal's Conjecture, formulated in 1997 by Andrew Beal, generalizes Fermat's Last Theorem. It states that for positive integers $A$, $B$, $C$, $x$, $y$, and $z$, if $A^{x} + B^{y} = C^{z}$ (where $x$, $y$, and $z$ are all greater than $2$), then $A$, $B$, and $C$ must share a common prime factor. Beal's Conjecture remains unproven, and a significant prize is offered for a solution. This paper provides a concise introduction to both conjectures, highlighting their connection and presenting a short proof of the Beal's Conjecture.
Mercedes Sosa: comunismo y represión en los años 70
Authors: Massholder Alexia
Published: June 2024

El presente trabajo aborda la trayectoria de Mercedes Sosa con el propósito de analizar los complejos vínculos entre el arte y la política en la década de 1970. Para ello, recuperamos una diversidad de fuentes documentales entre los que se destacan la prensa, algunos testimonios orales y los archivos de la Comisión Provincial de la Memoria, pues nos permiten reconstruir las argumentaciones y los modos de acción de diferentes organismos policiales y de inteligencia del Estado. De esta manera, el seguimiento de esta reconocida artista permite examinar los nexos entre dichas fuerzas y la articulación con la información de países vecinos en el marco de una inteligencia común.
Research on Middle School Chemistry Teaching Design Based on Real Problem Situation
Authors: Wu Liming , Zhang Xinyu , Sun Lin
Published: June 2024

In today's society, education in our country is showing an increasing trend of development. Chemistry, as a subject, has also made great progress. Most of the chemistry teaching models we remember from our childhood are to instil concepts, memorize concepts and ignore the combination of concepts with real-life situations, resulting in a mechanized and monotonous approach to learning chemistry. As a result, most secondary school students are not very good at chemistry. The reason for this is that chemistry is a very logical subject, and a large amount of chemical knowledge can be memorized by students using only one-sided words, which is still a challenge for them to understand. However, interest is the most valuable asset of children, therefore, this paper will be based on the existing information, and combined with the current theoretical research and development trend, in-depth discussion of the importance of the problem contextualized chemistry teaching, and through practical cases to explore how to better integrate the problem context into the chemistry classroom.
Geoengineering Disinformation: Two Opposing Testimonies and the Stakes for Humanity
Authors: Hagen Mark , Herndon J. Marvin , Whiteside Mark , Baldwin Ian
Published: June 2024

Covert military geoengineering operations have been ongoing for the better part of three decades. Civilian airlines based in NATO countries are part of this planetary operation. Its aim appears to be to warm the planet to gain access to the immense stores of hydrocarbons and strategically important minerals beneath polar ice. To keep the public from understanding what is going on, the governments involved, led by the U.S., have resorted to disinformation on a broad, no-holds-barred scale. Disinformation involves mixing truth with lies, half-truths with omitted truths, so that the public remains ignorant or misinformed, and thus disinclined to protest or otherwise intervene. Two long-term observers, one a geoengineering critic, the other a retired commercial airline pilot (and co-author of this article), provide differing testimony for the geoengineering holocaust.
Offenbarte Präferenzen in Bibliotheken
Authors: Lücke Christine , Waal Natalia , Leisering Philipp
Published: June 2024

Im Mittelpunkt dieses Artikels stehen die Bedürfnisse der Nutzenden in Bezug auf die Dienstleistungen der Universitätsbibliothek der Otto-von-Guericke-Universität Magdeburg als Lernort und Dritter Ort. Die sich wandelnden Bedarfe werden mit Hilfe des Konzepts der offenbarten Präferenzen näher beleuchtet. Dazu werden in diesem Artikel zunächst die theoretischen Grundlagen vorgestellt und Vorteile und Herausforderungen diskutiert. Anschließend wird anhand konkreter Praxisbeispiele gezeigt, wie Veränderungen in der Bibliothek im Sinne des Nutzendenverhaltens umgesetzt wurden.
Adaptation of the layer V supraspinal motor corticofugal projections from the primary (M1) and premotor (PM) cortices after CNS motor disorders in non-human primates: A survey
Authors: Rouiller Eric M.
Published: June 2024

Motor commands are transmitted from the motor cortical areas to effectors mostly via the corticospinal (CS) projection. Several subcortical motor nuclei also play an important role in motor control, the subthalamic nucleus, the red nucleus, the reticular nucleus and the superior colliculus. These nuclei are influenced by motor cortical areas via respective corticofugal projections, which undergo complex adaptations after motor trauma (spinal cord/motor cortex injury) or motor disease (Parkinson), both in the absence or presence of putative treatments, as observed in adult macaque monkeys. A dominant effect was a nearly complete suppression of the corticorubral projection density and a strong downregulation of the corticoreticular projection density, with the noticeable exception in the latter case of a considerable increase of projection density following spinal cord injury, even enhanced when an anti-NogoA antibody treatment was administered. The effects were diverse and less prominent on the corticotectal and corticosubthalamic projections. The CS projection may still be the major efferent pathway through which motor adaptations can take place after motor trauma or disease. However, the parallel supraspinal motor corticofugal projections may also participate in connectional adaptations supporting the functional recovery of motor abilities, representing potential targets for future clinical strategies, such as selective electrical neurostimulations.
Abundance of Fish, Source of Fat
Authors: Greco Angela , Pöllath Nadja
Published: June 2024

Fish was an important natural resource in Lower Mesopotamia. The ancient inhabitants could easily rely on the nutrients and fats derived from fishes abundant in the diverse aquatic biomes of its rivers, lakes, marshes and the gulf. Specifically, fats held significant value in ancient societies, and, besides its nutritional benefit, fish can also provide oil as a useful fatty substance. However, archaeo(zoo)logical data are uninformative as far as fish oil is concerned, while written documents detail its usage and supply but remain silent on its production methods. This contribution aims at presenting, comparing and combining the available evidence from modern data, the archaeological remains and Early Bronze Age written sources on the local ichthyofauna, focusing on the strategies adopted to optimize the exploitation of its fat.
The Experience of Mexican-Heritage Im/migrant Students in Rural Idaho
Authors: Buitron Eulalia Gallegos
Published: June 2024

Drawing from the conceptual frameworks of Chicana feminist epistemologies, community cultural wealth, and repertoires of practice, this ethnographic study explores how four Mexican-heritage im/migrant high school students negotiate school success in rural Idaho. Participant testimonios highlight the complex barriers that im/migrant students and their families confront as they participate in high school education, including limited institutional recognition of their varied cultural repertoires and community cultural wealth. Participant testimonios implicate local, state, and national policies and inform discussions on familial engagement, im/migration, and transnational curriculum.
A Systematic Review of the Concentration of Bacteria in Daycare Centers (DCCs)
Authors: Azman N.F.A. , Abdull Norhidayah , Mokhtar M.K. , Shahri Z.
Published: June 2024

Microbes in indoor buildings have gotten a lot of interest from the scientific community and the public because of their direct relationship to human health. However, there is still a shortage of thorough data on bacterial concentration in daycare centers air. This research systematically reviews the influencing factor of bacteria growth, the concentration of bacteria and proposes a further research direction. The research article was selected from year 2011 to 2022, 11 original research that met the qualifying criteria were assessed in the major databases. The highest indoor bacteria content was identified in a study from Portugal (5256 CFU/m3), while the lowest was found in an Iranian study (453.93 CFU/m3). The concentration of bacteria indoors are varies in different seasons and the higher indoor bacteria concentrations were found in winter and spring seasons. In addition, researchers also find a positive correlation between bacterial growth with the exposure of particulate matter (PM1, 2.5, PM10). This review reveals that a short sampling period is not enough to explain and evaluate the concentration of bacteria in daycare centers. Thus, research suggests that further research be done on bacteria exposure in daycare centers because it can raise awareness among parents and staff about the need for clean air for children and provide ideas for improving daycare facilities.
Safety and Quality Self-Evaluation Tool for Food Industry
Authors: Abdul Aziz Hanida , Jamari N. A. H.
Published: June 2024

Food safety and hygiene are crucially important in any baking industry. The absence of knowledge, attitude, and good practices among food workers has led to concerns over food safety in the modern era. The food industry faces increasing regulatory pressures and consumer demands for safe, high-quality products. To reduce the cases and issues in the food industry related to food contamination in the bakery industry, the evaluation will help determine the relationship between knowledge and good hygiene practices in food handling and the level of hygiene evaluation in food industry quality in food handling processes. The primary objective encompassed constructing a robust framework grounded in established legislation and developing a self-evaluation tool. Two experts in food safety participated in the content validation of the safety and quality self-evaluation tool. The scale-level content validity index (CVI) based on the average method is 0.97. These indicate that most of the items in the developed safety and quality self-evaluation tool meet the satisfaction levels of both experts. A case study was conducted to gain feedback using the System Usability Scale (SUS). The findings from the usability study indicated a marginal acceptability of the tool with an overall average SUS score of 66.25%.
Effect of Free Fatty Acid on Transesterification of Waste Cooking Oil
Authors: Maniam Gaanty Pragas , Lim Hui Shan , Mat Hussin Noraini
Published: June 2024

The presence of high free fatty acids (FFA) in the feedstock is a primary concern in biodiesel production. Waste cooking oil (WCO) is a potential environmentally friendly source, but further research is needed to fully characterize its properties. This study successfully explored the effect of FFA on the transesterification reaction and achieved the conversion of triglycerides in WCO to biodiesel under optimal conditions (molar ratio of oil to methanol 1:9, 2 hours, 65°C, catalyst loading 2.0 wt.% of WCO). The results show that for feedstocks with 0-3% FFA content, methyl ester conversion exceeds 90%, while for feedstocks containing 4-6% FFA, the conversion rate is less than 50%.  Biodiesel containing 4–6% FFA undergoes saponification reaction during washing, highlighting the need for pretreatment prior to transesterification. In contrast, 0-3% FFA showed no saponification effect. The physicochemical properties of biodiesel from each FFA% feedstock, including acid value, degree of saponification, viscosity, density, and moisture content, were observed and compared with the ASTM D6751 standard. The results show that the acid value is directly proportional to FFA%, while the saponification value is inversely proportional. This study found that other properties such as viscosity, density, and moisture content were not related to biodiesel quality. In contrast, saponification value testing and GC analysis highlighted the impact of FFA percentage in the feedstock on biodiesel production.
DIFFERENT DYNAMICS OF THE CHEMICAL COMPOSITION OF WATER IN THE BAIKAL ECOSYSTEM (BAIKAL, ITS TRIBUTARIES, AND THE SOURCE OF THE ANGARA RIVER)
Authors: ГРЕБЕНЩИКОВА В.И. , КУЗЬМИН М.И. , ДЕМЬЯНОВИЧ В.М.
Published: June 2024

Установлена разнонаправленная динамика изменения химического состава воды единственного стока о. Байкал — р. Ангара. Выявлен циклично-волновой характер изменения межгодового химического состава байкальской воды, что свидетельствует о наличии эффекта долговременной памяти в химических временных рядах элементов. Проявлены положительные и отрицательные температурные и химические тренды состояния воды истока Ангары, обусловленные изменением климата, влиянием приуроченности Байкала к рифтовой зоне, составом вмещающих пород. Показано, что текущие значения контролируемых элементов в воде истока Ангары зависят и от их прошлых значений, но могут резко изменяться при катастрофических нарушениях окружающей среды за счет природных и антропогенных катаклизмов (пожары, засуха, наводнения, землетрясения и др.). Прослежена связь между повышенными значениями урана в воде с сейсмическим процессом в районе озера Байкал. Полученные данные основаны на многолетних (1950—2021 гг.) мониторинговых исследованиях химического состава воды сопряженных компонентов Байкальской экосистемы (вода Байкала, притоки, исток Ангары).

Multidirectional dynamics of changes in the chemical composition of the water of the only runoff of Lake Baikal, the Angara River, has been established. The cyclic-wave change in the interannual chemical composition of the Baikal water has been revealed, which indicates a long-term memory effect in the chemical time series of elements. Positive and negative temperature and chemical trends in the state of the water in the source of the Angara are observed, which are due to climate changes, the confinement of Baikal to the rift zone, and the composition of the enclosing rocks. It is shown that the current concentrations of monitored elements in the Angara source water depend also on their past concentrations but can change dramatically in the case of catastrophic environmental disturbances caused by natural and anthropogenic disasters (fires, drought, floods, earthquakes, etc.). The relationship between the elevated concentrations of uranium in the water and the seismic process in the Baikal area has been traced. The data obtained are based on the long-term (1950–2021) monitoring of the chemical composition of water in the Baikal ecosystem (Baikal, its tributaries, and Angara source).
The study of the quenching mechanism of hemoglobin by curcumin in nanoemulsion
Authors: Iwunze Maurice O
Published: June 2024

Steady state fluorescence spectroscopy was used to study the mechanism of electron transfer reaction between hemoglobin and curcumin (biologically active molecules) in nanoemulsion. Nanoemulsion is a thermodynamically stable heterogeneous system made-up of water, oil and a dispersing agent, usually a surfactant and a cosurfactant in appropriate ratios. The reaction is postulated as activation controlled and the requisite energies: Gibb’s free energy, ΔGo, (1.317 eV), the solvent reorganization energy, λ, (0.76 eV), the activation energy, ΔG±, (1.02 eV) and its attendant first order rate constant, kact, (1.68 x 1011/s) were determined. They were used to formulate a plausible electron transfer mechanism.
Reaction of planktonic and benthic algae in the Black Sea to the consequences of the destruction of the Kakhovska Reservoir dam on the Dnipro River (Ukraine)
Authors: Minicheva G.G. , Garkusha O.P. , Kalashnik K.S. , Marinets G.V. , Sokolov Y.V.
Published: June 2024

The paper presents the results of study of the effects of the destruction of the Kakhovka dam on the Black Sea phytoplankton and phytobenthos. As a result of dam blast, unprecedented event took place: a huge volume of fresh water with a high concentration of nutrients and pollutants was dumped into the marine ecosystem. Field observations were conducted in the coastal zone of the Odesa Bay and in the open part of the northwestern part of the Black Sea (NWPB) using satellite technologies, in the period of June–August 2023. The object of research were communities of phytoplankton, micro- and macrophytobenthos. The metods include classical indices of marine algae assessment, analysis of satellite data and a holistic approach using universal morpho-functional indicators. The highest values both of chlorophyll a concentration and the ratio of water bloom area to the total area of the Ukrainian sector of the NWPB were recorded from the middle to the end of July 2023. For coastal phytoplankton, the maximum values of quantitative quantitative indicators of diatoms were noted one week after the catastrophe, of cyanoprokaryotes – two weeks later. Functioning of algae with different ecological activity (S/W of phytoplankton – 964.9, microepiphyton – 542.6, macrophytes – 80.9 (m2∙kg-1) optimizes the mechanism of restoration of the marine ecosystem to the state before the disaster. Temporary wave-like outbreaks of the development of planktonic and benthic algae in conditions of unlimited availability of nutrients in the marine environment were revealed. The half-period of the wave of phytoplankton growth according to the value of the Surface Index (SI, unit) is reached in approximately 3 weeks. In the maximum phase of water bloom the development of macrophytobenthos is inhibited As the intensity of the bloom fades, the conditions for the further development of benthic macroalgae are restored. The half-period of the wave of phytobenthos development (according to the IP value) is approximately 5 weeks.
Gambaran Sanitasi Total Berbasis Masyarakat (STBM) di Kota Depok Jawa Barat Tahun 2023
Authors: R Alya Aulia , Wardani Riastuti Kusuma
Published: June 2024

AbstrakSanitasi Total Berbasis Masyarakat (STBM) merupakan salah satu program pemberdayaan masyarakat untuk mendorong masyarakat untuk merubah perilaku sanitasi dan higiene.  Indikator output STBM berupa setiap rumah tangga mendapatkan akses sanitasi dasar; bebas dari buang air besar sembarangan, dapat mengelola air minum, makanan, dan limbah sampah dengan aman serta benar. Tujuan penelitian ini adalah mengetahui gambaran Sanitasi Total Berbasis Masyarakat (STBM) di Kota Depok Jawa Barat Tahun 2023. Penelitian ini menggunakan data sekunder tahun 2023 Dinkes Depok dengan desain cross-sectional dan sampel sebesar 36.276. Hasil uji statistik menunjukkan bahwa gambaran Pilar 1 STBM di Kota Depok adalah 98% Stop Buang Air Besar Sembarangan, Pilar 2 STBM adalah 93.5% Cuci Tangan Pakai Sabun, Pilar 3 STBM adalah 64.7% Tidak Pengamanan Air Minum dan Makanan Rumah Tangga, Pilar 4 STBM adalah 62.9% Tidak Pengamanan Sampah Rumah Tangga, dan Pilar 5 STBM adalah 77.8% Tidak Pengamanan Limbah Cair Rumah Tangga. Gambaran STBM di Kota Depok tahun 2023 belum tercapai 100%. Diperlukan adanya pengarahan kepada masyarakat terhadap langkah sanitasi rumah tangga yang baik dan benar serta pemenuhan fasilitas yang diperlukan untuk mewujudkan STBM.Kata Kunci: Sanitasi Lingkungan, Sanitasi Lingkungan Rumah Tangga, STBMAbstractCommunity-Based Total Sanitation (STBM) is a community empowerment program to encourage people to change sanitation and hygiene behavior. STBM’s output indicators are that every household has access to basic sanitation and is free from open defecation, and every household can manage drinking water, food and household waste safely and correctly. The purpose of this study was to find out the description of Community-Based Total Sanitation (STBM) in Depok City, West Java in 2023. The research design was cross-sectional which took place in June-August 2023. This study is using secondary data from Depok’s District Health Office with 36.276 samples. The results of statistical tests show that STBM Pillar 1 in Depok City is 98% Stop Open Defecation, STBM Pillar 2 is 93.5% Washing Hands with Soap, STBM Pillar 3 is 64.7% Unsafe Household Drinking Water and Food Processing, Pillar 4 STBM is 62.9% Unsafe Household Waste Processing, and Pillar 5 STBM is 77.8% Unsafe Household Liquid Waste Processing. The STBM in Depok City in 2023 has not been 100% achieved. There is a need for guidance to the community on good and correct household sanitation steps and the fulfillment of the facilities needed to realize STBM.Keywords: Environmental Sanitation, Household Environmental Sanitation, STBM
Effect of feed protein on reproduction, proximate composition, and hemolymph metabolite profile of snail (Achatina achatina)
Authors: Tchowan Guy-Merlin , Egbe Ben Besong , Toukala Jean Paul , Ngoula Ferdinand , Tchoumboué Joseph
Published: June 2024

The study was conducted at the Teaching and Research Farm of the Faculty of Agriculture and Veterinary Medicine of the University of Buea, Cameroon, to assess the impact of protein on the reproduction, proximate composition, and hemolymph metabolite profile of Achatina achatina snails. Ninety newly hatched snails were divided into three treatments of five animals each, with six replicates. Each treatment group was allocated to one of the experimental diets with different protein levels (T1: 20%, T2: 22%, and T3: 24%). Results revealed that snails fed a diet containing 22% protein (T2) exhibited the earliest age of maturity onset and the highest number of spawns per treatment (7.00 ± 0.00). Conversely, within the same treatment group, snails had the lowest number of eggs per clutch (4.83 ± 0.38). The weight, length, and diameter of the eggs were influenced by the protein level in the diet, with the significantly highest values recorded in snails receiving 20% protein (T1). Animals fed the lowest protein level diet (T1) exhibited reduced values across various parameters, including the fertilization rate (33.00 ± 0.00), incubation period (26.25 ± 0.00), rate of newly hatched snails (75.00 ± 0.00), and newly hatched weight per laying (0.69 ± 0.00). In contrast, those fed a diet containing 22% protein (T2) showed higher values for these parameters, along with the lowest protein value in the hemolymph. Additionally, a correlation was observed between the protein level in the diet and a decrease in total cholesterol in the hemolymph. Notably, values such as live weight, shell weight, soft tissue, total meat, viscera, shell-meat ratio, and pedal mass exhibited an increase with 22% protein (T2) content in the diet. In conclusion, incorporating a protein level similar to T2 in the diet of adult snails is recommended for commercial purposes.
Project Spotlight: GFRC proves best solution for San Francisco hotel
Authors: Atkinson William
Published: June 2024

Serif Residences and the Line Hotel in downtown San Francisco used 671 precast concrete panels made of 79,000 sq.ft. (7300 sq.m.) of glass-fi¬ber-reinforced concrete from Willis Construction of San Juan Bautista, Calif.
Uso de los sitios web de los parlamentos para promover la deliberación ciudadana en el proceso de toma de decisiones públicas. Estudio comparado de diez países (América y Europa)
Authors: Giraldo-Luque Santiago , Villegas-Simón Isabel , Durán-Becerra Tomás
Published: June 2024

El estudio presentado desarrolla una investigación longitudinal (2010-2015) sobre 10 países —5 europeos (Francia, Reino Unido, Suecia, Italia y España) y 5 americanos (Argentina, Ecuador, Chile, Colombia y EE.UU.)— con el objetivo de comparar el uso de las páginas web por parte de las instituciones parlamentarias de los países analizados como un instrumento de promoción de la participación ciudadana en el proceso de toma de decisiones públicas. El texto se centra en el eje deliberativo de la participación en internet (Macintosh, 2004; Hagen, 2000; Vedel, 2003, 2007) y en la forma en la que las instituciones representativas definen una estrategia digital para construir una esfera pública on-line. A partir del reconocimiento de internet como una esfera de debate y como un lugar de reconfiguración de la tradicional —y utópica— Ágora Griega, el estudio adopta la deliberación dentro de los ejes de acción política para evaluar, a través de un análisis de contenido, la manera en la que las instituciones legislativas de cada país utilizan los instrumentos y plataformas de internet. El artículo muestra cómo y qué parlamentos utilizan qué herramientas disponibles de internet —integradas en su página web— como escenarios de deliberación en los diferentes procesos legislativos que integran los sistemas políticos examinados. Los resultados comparados muestran las diferencias principales y similitudes entre los países, así como una tendencia a la reducción en la oferta de herramientas de deliberación dentro de los cuerpos representativos de los países de la muestra.
Political influencers. A study of Donald Trump’s personal brand on Twitter and its impact on the media and users
Authors: Pérez-Curiel Concha , Limón-Naharro Pilar
Published: June 2024

The personality of a political candidate, above and beyond governments and parties, is understood increasingly more as a brand image. The new political influencers are making a clean sweep of social networks and it is the media that reproduce an information model that, far from being grounded in transparency and quality, promotes a post-truth discourse, halfway between provocation and spectacle. This initial hypothesis focuses on Donald Trump’s profile, first as a presidential candidate and later on as US President. In parallel, Twitter users have swiftly succumbed to the leader’s appeal. Thus, this paper studies the impact of Trump’s tweets on the US reference press during the first 100 days of his presidency. More specifically, it analyses the correspondences between the tweets posted on his personal Twitter account (@realDonaldTrump, with more than 45 million followers) and the front page news in USA Today, The Boston Globe, The Wall Street Journal and The New York Times. Regarding public response, digital prosumer metrics (“likes,” retweets and comments) have been quantified in order to verify the degree of influence exerted by Trump on public opinion. The method employed here includes a quantitative and qualitative content analysis based on three categories: the politician’s tweets, front page news and online user metrics. The results confirm Trump’s empowerment on Twitter as both a main source of news and a political influencer as regards the media and the citizenry.
Evolution of the Field of Social Media Research through Science Maps (2008-2017)
Authors: Gálvez Carmen
Published: June 2024

The objectives of this work were to discover the main points of interest in the field of research on Social Media, within the scientific area of Communication, and to analyse how it has evolved. A methodology based on the analysis of co-words and visualisation techniques was applied. The data was obtained from scientific publications indexed in the Web of Science (WoS) database, during the periods 2008-2012 and 2013-2017. The resulting maps showed that, during the period 2008-2012, the main areas of interest were web 2.0 and the internet in terms of social networking sites. However, during the period 2013-2017, there was a strong upward trend in the impact of social networks and platforms, especially Twitter and Facebook, in many areas (such as social movements, public relations and publicity, distribution of content, crisis communication, participatory journalism, political communication, or the configuration of public identities through social platforms, with special emphasis on youth). Finally, new scientific challenges were found in automatic analysis of content and management of big data. In conclusion, it was possible to transform a complex, underlying, dynamic and multidimensional reality into visible representations that could help experts in the field to better understand the evolution of research on Social Media.
World economy structural transformation
Authors: Bagdasaryan Kniaz
Published: June 2024

The recent changes in international trade and the multilateral trading system of the World Trade Organization have led to many discussions on the transformation of the world economy. Meanwhile, there is no common understanding of the genesis of the transformation of the world economy. Trading sanctions imposed unilaterally by a group of unfriendly countries against the Russian Federation contributed to the focus on applied trade aspects and formed a narrow vision of the causes of the ongoing changes, mainly associated with changes in international trade flows.
Based on the generalized theoretical analysis and systematization of the most significant events that have influenced the course of development of the world trade and economic, financial and economic systems, it is shown that the drivers of structural transformation of the world economy are technologies. In the author's opinion, structural transformation as a process of transformation began in 2008 (more than 15 years ago), currently there is a systemic (!) transformation of the world economy and international institutions responsible for global development and international division of labor. This is explained by the fact that: (a) in 2008, there was laid the foundation of a new global financial system based on blockchain technology; (b) in 2011, at the Hannover Industrial Fair, there was laid the foundation of the fourth industrial revolution (Industry 4.0) through the optimization of production and integration of cyber-physical systems into factory processes; (c) in 2017, there began a systemic transformation of international institutions by changing the rules of international trade and division of labor that have been in force for more than half a century.
In theory, the obtained results mean that the world is facing fundamental changes that are irreversible.
In practice, it means that for the long-term sustainable development of the Russian economy and the preservation of strategic trade and economic ties with the integration groupings of the CIS and EAEU, it is vital to seek a comprehensive international consensus and actively participate in the formation of new norms and rules of international institutions and international economic relations.
Leaf gas exchange and water relations in two assai cultivars submitted to water-deficit
Authors: Navegantes Patricia Cardoso Andrade , Lopes Filho Wagner Romulo Lima , Rodrigues Flávio Henrique Santos , Monteiro Gabriel Gustavo Tavares Nunes , Chaves Rosane Patrícia Ferreira , Oliveira Neto Candido Ferreira , Cunha Roberto Lisboa , Pinheiro Hugo Alves
Published: June 2024

Abstract: Assai (Euterpe oleracea Mart.) cultivars BRS-Pará (BRS-PA) and BRS-Pai d’Égua (BRS-PDE) were selected for cultivation in upland regions of the Amazon. Given these cultivars were developed from different progenitors, we postulated that they differ regarding water-deficit tolerance. To test this hypothesis, plants of both cultivars were evaluated under well-watered (control) and water-deficit conditions (pre-dawn leaf water potential of – 2.33 MPa). Relative to control, the water-deficit decreased net CO2 assimilation rate (A) and transpiration by 82% and 86% in both cultivars, while the stomatal conductance (gs) was reduced by 93% and 87% in stressed plants of BRS-PDE and BRS-PA. The water-deficit improved instantaneous water-use efficiency by 43% in both cultivars, while intrinsic water-use efficiency (A/gs) increased by 193% and 33% in BRS-PDE and BRS-PA. The water-deficit induced 44% increase in foliar proline and 27% decrease in soluble carbohydrates in both cultivars, while foliar sucrose decreased by 53% in BRS-PA and 16% in BRS-PDE in relation to control. The relative water content in stressed plants of both cultivars was decreased by 8.5% in relation to control. In conclusion, the more efficient stomatal opening control and higher A/gs in BRS-PDE indicate this cultivar better copes with drought than BRS-PA.
Meta-Worry, Anxiety, and Depression in the COVID-19 Pandemic (Brazil, March 2020)
Authors: Silva-Santos Luana Cristina , Faro André , Silva Maísa Carvalho , Vasconcelos Matheus Macena
Published: June 2024

Abstract This study evaluated the relationship between meta-worries and anxiety and depressive symptoms at the beginning of the COVID-19 pandemic in Brazil. In March 2020, 2,042 individuals, aged 18-78 years were recruited. A sociodemographic questionnaire, the 4-item Patient Health Questionnaire, and the Meta-Worry Questionnaire were administered online. Four logistic regression models were used to estimate the effects of the independent variables on anxiety and/or depressive symptoms with explained variances between 28% and 39%. Being younger, not having a steady income, perceiving oneself as sick, and having a high meta-concern level increased the chances of anxiety and/or depressive symptoms. Finally, we hope to contribute to the screening of factors associated with mental disorders in Brazil at the beginning of the pandemic.
Adolescent Assertiveness Assessment Scale: Evidence of Content Validity
Authors: Lima Sara Luize Pereira de , Simeão Shirley de Souza Silva , Silva Washington Allysson Dantas , Galdino Melyssa Kellyane Cavalcanti
Published: June 2024

Abstract This study aimed to present the process of elaborating the Adolescent Assertiveness Assessment Scale (AAA-S). Based on the analysis of judges, evidence of the validity of the content of the instrument was established, assessing the criteria of relevance, pertinence, and clarity of the items. In addition, a study with a sample of the instrument’s target population showed good indices for the comprehensibility of the items (semantic validity). Based on these results, the illustrated version of the instrument was elaborated, which underpins the general scope of the psychometric study on the construct validity and accuracy of AAA-S and sheds light on the development of new studies on the factorial validity of the instrument.
Usability of the ROBOVID mobile app for health education about COVID-19
Authors: Correia Gabrielle dos Santos , Silva Aline Cerqueira Santos Santana da , Pinto Layanne Fonseca , Góes Fernanda Garcia Bezerra , Goulart Maithê de Carvalho e Lemos , Pereira-Ávila Fernanda Maria Vieira
Published: June 2024

Objective: to evaluate the usability of the ROBOVID mobile application for health education about COVID-19. Method: methodological study with an applied quantitative approach, developed with 21 adults, using an electronic form. Usability was assessed using the System Usability Scale. The Statistical Package for the Social Sciences software was used to analyze the data. Results: the overall average score on the System Usability Scale questionnaire was 87.3, which classifies the usability of the ROBOVID application as the best achievable. Furthermore, the application has high scores for ease of memorization, user satisfaction and ease of getting to know the system, as well as excellent scores for absence of errors and speed in carrying out the tasks set. Conclusion: the ROBOVID application complies with the principles of usability in terms of efficiency, effectiveness and satisfaction in the evaluation of end users, showing that the application meets consumer needs in terms of its functionalities, demonstrating its viability in terms of the initial objectives.
Adopción del rol, ansiedad, depresión y soledad en cuidadores familiares de pacientes con enfermedades crónicas
Authors: Carreño-Moreno Sonia , Pacheco-López Mario , Arias-Rojas Mauricio
Published: June 2024

Objetivo: describir y explorar la relación de la soledad, la ansiedad y la depresión con la adopción del rol de cuidador entre personas que se ocupan de cuidar pacientes con enfermedades crónicas en Colombia. Métodos: se trató de un estudio exploratorio y transversal con la participación de 960 cuidadores principales de personas con enfermedades crónicas. Aplicamos la Escala de Adopción del Rol de Cuidador, la Escala de Soledad de la Universidad de California de Los Ángeles y la Escala de Ansiedad y Depresión. Se realizaron análisis de componentes principales y de correspondencia múltiple para el clustering . Resultados: el 40,8% de los cuidadores que participaron en el estudio informó padecer depresión, el 59% informó ansiedad, el 54,6% indicó soledad de moderada a grave y el 88,6% presentó adopción satisfactoria del rol de cuidador. Los cuidadores que presentaron los niveles básico o insuficiente en términos de adopción del rol tendieron a obtener puntuaciones de ansiedad, depresión y soledad más elevadas. Conclusión: adoptar el rol de cuidador es un mediador de los niveles de ansiedad, depresión y soledad entre los cuidadores. Las estrategias dirigidas a apoyar a los cuidadores deberían incluir preparación para dicho rol a fin de mitigar los efectos negativos de la ansiedad, la depresión y la soledad.
Subconjunto terminológico para la Clasificación Internacional para la Práctica de Enfermería en Diabetes Mellitus
Authors: Chaves Fernanda Azeredo , Torres Heloisa de Carvalho , Chianca Tânia Couto Machado
Published: June 2024

Objetivo: describir el proceso de elaboración de un subconjunto terminológico para la Clasificación Internacional para la Práctica de Enfermería en Diabetes Mellitus , basado en la Teoría de las Necesidades Humanas Básicas de Horta y en la Teoría Social Cognitiva de Bandura. Método: estudio metodológico realizado a partir de la identificación en la literatura de 313 enunciados de diagnósticos de Enfermería pertinentes al cuidado en diabetes, seleccionados y validados por consenso de enfermeras especializadas en diabetes, provenientes de diferentes estados de Brasil, utilizando la técnica de grupo nominal. Resultados: fueron seleccionados 156 enunciados diagnósticos/resultados de Enfermería, así relacionados: 111 (71,15%) con las necesidades psicobiológicas; 42 (26,92%) con las psicosociales y tres (1,92%) con las psicoespirituales. Fueron construidas 433 intervenciones de Enfermería. Los enunciados diagnósticos fueron validados a partir del consenso entre las especialistas con índice de validez de contenido medio de 0,89; siendo: 0,87 para las necesidades psicobiológicas; 0,93 para las psicosociales y 0,77 para las psicoespirituales. Conclusión: el estudio validó los enunciados del subconjunto terminológico para la Clasificación Internacional para la Práctica de Enfermería en diabetes, favoreciendo el raciocinio clínico, la calificación del Proceso de Enfermería y la mejora de las prácticas de autocuidado en diabetes. También, posibilitó la utilización de lenguaje propio de la Enfermería basado en una clasificación reconocida mundialmente.
Revisitando modos normais de oscilações acopladas com a Teoria Espectral de Grafos
Authors: Cunha Felipe Costa Melo , Guilhon Ivan , Sampaio Samuel Madeiro , Sampaio Antônio José da Costa , Sampaio Rudini Menezes
Published: June 2024

O clássico livro de David Morin intitulado “Introduction to Classical Mechanics” de 2007, bem conhecido entre os estudantes de olimpíadas internacionais de Física, contém vários exercícios de oscilações acopladas que inspiraram problemas em provas recentes. Neste artigo, apresentamos esses problemas, incluindo soluções e simulações computacionais usando recursos avançados do Desmos, um sistema gráfico online e gratuito. Além disso, mostramos um modo geral mais didático de se compreender tais problemas, mesmo os mais complexos, combinando Álgebra Linear e Teoria dos Grafos.
Redescription of Austrolebias accorsii (Cyprinodontiformes: Rivulidae) and description of a new species of the genus from the upper Paraguay River basin
Authors: Drawert Heinz Arno , Ergueta Carlos
Published: June 2024

Abstract Austrolebias accorsii is redescribed based on specimens from type-locality, nearby temporary pools, and other locations within the same hydrologic unit. Additionally, a novel Austrolebias species is described, exclusively found in two temporary waterbodies in “Abayoy”, a unique vegetation type situated in the transitional zone between the Dry Chaco, Chiquitano Dry Forest, and Pantanal Flooded Savannas ecoregions in southeastern Bolivia, bordering Paraguay, where the last voluntarily isolated indigenous people outside the Amazon in America reside. Diagnostic characters for both species are presented. Within Austrolebias two species groups are recognized with different morphological characters, geographical distribution, and ecological traits of their habitats. Furthermore, we suggest the usage of median and interquartile range rather than mean and standard deviation to analyze morphometric and meristic data of rivulids, given the typically non-Gaussian distribution of this data.
Salicylic acid and soaking times on the emergence, gas exchange and early growth of umbu
Authors: Correia Máximo A. , Silva Luderlândio de A. , Nóbrega Jackson S. , Souto Lauter S. , Brito Larissa A. , Moreira Romulo C. L. , Souza Anielson dos S. , Sá Francisco V. da S.
Published: June 2024

ABSTRACT Umbu is a fruit species to the Brazilian Caatinga, showing a significant potential for various purposes and serving as a source of job and income for small producers in northeastern Brazil. This species has seed coat dormancy, which limits the production of uniform planting areas. In this scenario, this study aimed to evaluate the overcoming of dormancy, gas exchange and initial growth of S. tuberosa subjected to different soaking times and concentrations of salicylic acid. The experiment was conducted in a randomized block design with a 5 × 5 factorial arrangement referring to five concentrations of salicylic acid (0, 40, 80, 120, and 160 mg L-1) and five soaking times (0, 8, 16, 24, and 32 hours). Seed conditioning for 32 hours at the concentration of 120 mg L-1 promoted the highest germination percentage and germination speed index of S. tuberosa seedlings. Soaking at 40 and 80 mg L-1 of salicylic acid improves the gas exchange and growth of S. tuberosa seedlings. The concentration of 160 mg L-1 for 32 hours increased root, stem, and total dry matter. Leaf dry matter was higher in plants subjected to the concentration of 80 mg L-1 and the time of 14 hours. Conditioning the seeds for 32 hours at a concentration of 120 mg L-1 was effective in overcoming seed dormancy and could be a alternative for producing S. tuberosa seedlings.
Viability and conservation of genipap tree pollen grains
Authors: Freire Gilmara da S. , Machado Caroline de A. , Silva Ana V. C. da , Ledo Ana da S.
Published: June 2024

ABSTRACT Conservation of plant genetic resources is vital for maintaining diversity for future use. The conservation of pollen grains is one of the tools complementary to conventional conservation strategies and plays an important role in breeding programs. Considering the importance of genipap trees and the lack of studies related to their floral biology and pollen conservation, the aim of this study was to evaluate the storage potential of pollen grains under different storage conditions. This study was conducted at the Plant Tissue Culture Laboratory of Embrapa Tabuleiros Costeiros, Aracaju, SE, Brazil. Flowers were collected in the preanthesis phase, and the pollen grains were placed in cryotubes and kept at different temperatures (i.e., 4°C, -20°C, -80°C, and -196°C) after extraction. Evaluations were performed after 30, 60, 90, 120, 150, and 180 days of storage. After 180 days, the germination percentage of the pollen tube was greater than 60.00% for all storage temperatures. The lowest percentage (60.21%) was observed under the storage condition of 4°C. Therefore, the other three temperatures are more highly recommended for ex situ conservation of pollen grains.
Alternative management strategies reduced the incidence and severity of root rot of melon
Authors: Borges Darlan F. , Nogueira Geovane de A. , Cruz Gisellya de A. , Araújo Maria B. M. , Silva Washington L. da , Ambrósio Márcia M. de Q.
Published: June 2024

ABSTRACT Melon (Cucumis melo L.) is one of the most economically important fruit crops in the Northeastern region of Brazil, nearly all production is exported to European countries. Because of the indiscriminate use of monoculture, the incidence of soilborne pathogens in melon fields is on the rise, resulting in increasing losses in fruit production. The objective of this study was to investigate if the incorporation of different vegetable materials (Crotalaria juncea L. and Pennisetum glaucum L.) in the soil, combined with polyethylene mulch, and the application of commercial products (Compost-Aid® + Soil-Set®) can efficiently control soilborne pathogens in melon fields. Two greenhouse experiments were identically set up using soil naturally infested with various phytopathogenic fungi, including Fusarium spp. and Macrophomina spp. The experimental design was completely randomized, with seven treatments and seven replications. The pathogens’ occurrence, disease incidence, and severity were evaluated, as well as fruit quality indicators (weight, firmness, and Brix Degree). Two treatments showed great potential for decreasing disease incidence, severity, and the occurrence of pathogens. One of the treatments had pearl millet (Pennisetum glaucum) incorporated into the soil that was covered with polyethylene mulch. The other treatment was when crotalaria was incorporated into the soil and covered with polyethylene mulch. Commercial products (Compost- Aid® and Soil-Set®) were applied in high temperatures and lower humidity, in both treatments. Plants submitted to these treatments also yielded fruits with higher weight and Brix Degree than the control treatment.