bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Implementation of Game Technologies in the Bachelor Program «Personnel Management» Using the ADDIE Model
Authors: Shchegulina Oksana
Published: June 2021

The issues of the need to take into account the requirements of professional standards in the higher education system are highlighted and considered in order to harmonize the relationship between the labor market and the sphere of vocational education. The characteristics of the work program of the discipline are analyzed in the context of updating the Federal State Educational Standard of Higher Education in connection with changes in the organizational and content component of higher education in Russia. The main attention is paid to the problem of using active teaching methods that contribute to the formation and development of practice-oriented competencies of students. Based on the study of materials on various approaches to ensuring the effectiveness of practice-oriented learning, the significant role of business games has been established. Consideration of a business game as a simulation model of a real professional and life situation is proposed. The functions and structure of the business game are highlighted. The specificity of pedagogical design as a systematic approach to the formation of a curriculum is considered, as well as the ADDIE model, which is used as a universal approach to the development of an educational resource. The main results of using the ADDIE model in the development and implementation of a business game in the discipline of the variable block of the curriculum of the bachelor's educational program "Personnel Management" are presented.
Talent Management: Challenges and Challenges for a Digital Tomorrow
Authors: Panova E. , Oparina Natalya , Bondareva L.
Published: June 2021

The article is devoted to the analysis of the impact of products of technological development and digitalization on corporate human resources policies. The transition of organizations from the interpretation of personnel as a labor resource to their perception as a "talent" is postulated as a bright trend. It is indicated that this process will be especially pronounced in high-tech companies and enterprises that work closely with the sphere of "high technologies". A number of features of «generation Z» personnel are specified, which form the requirement for the development and implementation of a specific corporate model of talent management adapted to them. The analysis of the impact of information technology, the capabilities of artificial intelligence and predictive analytics on the policy in the field of "talent management" is given. The author's vision of the main blocks of competencies required for talent management professionals in the coming years, involved in attracting, motivation and retaining talent in companies of the digital future, is presented.
Totally bipartite tridiagonal pairs
Authors: Nomura Kazumasa , Terwilliger Paul
Published: June 2021

There is a concept in linear algebra called a tridiagonal pair. The concept was motivated by the theory of $Q$-polynomial distance-regular graphs. We give a tutorial introduction to tridiagonal pairs, working with a special case as a concrete example. The special case is called totally bipartite, or totally bipartite (TB). Starting from first principles, we give an elementary but comprehensive account of TB tridiagonal pairs. The following topics are discussed: (i) the notion of a TB tridiagonal system; (ii) the eigenvalue array; (iii) the standard basis and matrix representations; (iv) the intersection numbers; (v) the Askey--Wilson relations; (vi) a recurrence involving the eigenvalue array; (vii) the classification of TB tridiagonal systems; (viii) self-dual TB tridiagonal pairs and systems; (ix) the $\mathbb{Z}_3$-symmetric Askey--Wilson relations; (x) some automorphisms and antiautomorphisms associated with a TB tridiagonal pair; and (xi) an action of the modular group ${\rm PSL}_2(\mathbb{Z})$ associated with a TB tridiagonal pair.
Effect of misalignment at different orientations associated with angle κ on optical performance of aspheric intraocular lenses with different surface designs
Authors: Yuan Bo , Li Jun , Song Hui
Published: June 2021

Intraocular lens (IOL) misalignment and angle

κ

have had significant negative impact on post-operative quality of vision. ZEMAX software has been used to imitate the optical performance of pseudophakic eyes with different IOL surface designs at different orientations of IOL misalignment (decentration of 0.4 mm and tilt of  7°, and with the existence of  0.5 mm angle

κ

). We found that an aspheric balanced curve optic surface maintained better optical performance via inducing less coma aberration. Coma aberration played an unexpectedly important role in the optical performance. With angle

κ

, the impact of IOL misalignment on visual quality was associated with the orientation of decentration and tilt, indicating that the coma compensation also took effect in pseudophakic eyes. Due to the high incidence of post-operative IOL misalignment, our results provide evidence of the importance of considering personalized angle

κ

before cataract surgery for patients.
Synchronous measurement of temperature and deformation by an ultraviolet imaging system and monochromatic pyrometry at extreme temperatures
Authors: Zhang Jinsong , Wang Jinyang , Yue Mengkun , Wei Dong , Gui Yewei , Tang Yunlong , Feng Xue
Published: June 2021

Synchronous measurement of temperature and deformation at elevated temperatures is
highly critical, yet challenging in evaluating mechanical properties
of thermal protection systems. An ultraviolet (UV) imaging system is
proposed to obtain noncontact, in situ,
synchronous, and full-field temperature and deformation. The
established system consists of a monochromatic UV illumination with a
bandpass filter for radiation suppressing, a UV CCD camera for image
capturing, and an infrared pyrometer for temperature recording.
Additionally, an improved monochromatic radiation pyrometry method is
proposed, while a deformation measuring method using the UV digital
image correlation (UV-DIC) and natural textures-generated speckle is
introduced. Furthermore, through camera calibration at room
temperature and real-time exposure time adjusted at elevated
temperatures, the influence of reflection on radiation pyrometry and
unfiltered radiation on DIC analysis is eliminated. Synchronous
temperature and deformation fields of C/SiC subjected to flame heating
are experimentally measured with a temperature range of 500°C–1500°C,
and results demonstrate the efficacy and potential of the proposed
system and method. Finally, the importance of exposure time on
balancing the light intensity of radiation and reflection is also
discussed.
Rigorously aplanatic Descartes ovoids
Authors: Silva-Lora Alberto , Torres Rafael
Published: June 2021

It is known that, besides being stigmatic, spherical refracting surfaces are aplanatic at their Young points since they satisfy the Abbe sine condition rigorously. The Abbe sine condition is commonly applied to different optical systems using numerical methods or optimization processes, obtaining a design of approximately aplanatic systems. Here, we found several families of Cartesian surfaces, whose sets of each of these families constitute exactly aplanatic systems free of spherical aberration and coma. So, studying the different types of systems, it is found that rigorous aplanatism occurs for objects and images on curved surfaces.
Optical-component-only adaptive optics
Authors: Cagigal Manuel P. , Fuentes Antonio , Valle Pedro J. , Canales Vidal F. , Cagigas Miguel A.
Published: June 2021

This Letter introduces a technique for performing binary adaptive optics, which is carried out by optical components only, without the help of any electronic or optoelectronic device. In this technique, the interferogram produced by a point diffraction interferometer modulates a light-driven crystal. The modulated light-driven crystal may produce pupil-plane only-phase or only-amplitude binary masks to mitigate phase aberrations. The capability of working unsupported makes it suitable for application in hard-to-reach or hazardous locations such as satellites, underwater, or contaminated places. The Letter includes an experimental validation where the ability of the technique to produce pupil amplitude masking is confirmed.
Wie wirtschaftlich sind private Investitionen in öffentlich geförderten Mietwohnungsbau?
Authors: Lerbs Oliver , Nobbe Lena
Published: June 2021

In vielen deutschen Städten herrscht akuter Mangel an preisgünstigem Wohnraum. Die Politik hat sich vor diesem Hintergrund zum Ziel gesetzt, die Anzahl der Sozialwohnungen zu erhöhen. Aufgrund begrenzter öffentlicher Mittel muss zur Erreichung dieses Zieles privates Kapital mobilisiert werden. Dies bedeutet Investitionen privat-gewerblicher Wohnungsunternehmen in öffentlich geförderten Wohnraum. Entsprechende Investitionen werden durch Förderprogramme der Bundesländer subventioniert, gelten jedoch in Branchenkreisen trotz vorhandener Förderung als wenig wirtschaftlich. Anhand realitätsnaher Modellrechnungen zeigt dieser Beitrag, dass die derzeit zu erwartende Wirtschaftlichkeit privater Investitionen in öffentlich geförderten Wohnraum tatsächlich gering ist. Dies gilt selbst unter Berücksichtigung der jüngsten Verbesserungen im Wohnraumförderungsrecht, der im Jahr 2019 eingeführten Sonderabschreibung im Mietwohnungsbau sowie den aktuell historisch günstigen Fremdfinanzierungsbedingungen für Wohnungsunternehmen. Weiter zeigt der Beitrag, dass Kommunen in der preisvergünstigten Veräußerung städtischer Grundstücke an bauwillige Investoren über ein wohnungspolitisches Instrument verfügen, mit dem die Wirtschaftlichkeit privater Investitionen in öffentlich geförderten Wohnraum potenziell entscheidend gesteigert werden kann.
Computation of condition-dependent proteome allocation reveals variability in the macro and micro nutrient requirements for growth
Authors: Lloyd Colton J. , Monk Jonathan , Yang Laurence , Ebrahim Ali , Palsson Bernhard O.
Published: June 2021

Sustaining a robust metabolic network requires a balanced and fully functioning proteome. In addition to amino acids, many enzymes require cofactors (coenzymes and engrafted prosthetic groups) to function properly. Extensively validated resource allocation models, such as genome-scale models of metabolism and gene expression (ME-models), have the ability to compute an optimal proteome composition underlying a metabolic phenotype, including the provision of all required cofactors. Here we apply the ME-model for Escherichia coli K-12 MG1655 to computationally examine how environmental conditions change the proteome and its accompanying cofactor usage. We found that: (1) The cofactor requirements computed by the ME-model mostly agree with the standard biomass objective function used in models of metabolism alone (M-models); (2) ME-model computations reveal non-intuitive variability in cofactor use under different growth conditions; (3) An analysis of ME-model predicted protein use in aerobic and anaerobic conditions suggests an enrichment in the use of peroxyl scavenging acids in the proteins used to sustain aerobic growth; (4) The ME-model could describe how limitation in key protein components affect the metabolic state of E. coli. Genome-scale models have thus reached a level of sophistication where they reveal intricate properties of functional proteomes and how they support different E. coli lifestyles.
Mosquito metallomics reveal copper and iron as critical factors for Plasmodium infection
Authors: Maya-Maldonado Krystal , Cardoso-Jaime Victor , González-Olvera Gabriela , Osorio Beatriz , Recio-Tótoro Benito , Manrique-Saide Pablo , Rodríguez-Sánchez Iram Pablo , Lanz-Mendoza Humberto , Missirlis Fanis , Hernández-Hernández Fidel de la Cruz
Published: June 2021

Iron and copper chelation restricts Plasmodium growth in vitro and in mammalian hosts. The parasite alters metal homeostasis in red blood cells to its favor, for example metabolizing hemoglobin to hemozoin. Metal interactions with the mosquito have not, however, been studied. Here, we describe the metallomes of Anopheles albimanus and Aedes aegypti throughout their life cycle and following a blood meal. Consistent with previous reports, we found evidence of maternal iron deposition in embryos of Ae. aegypti, but less so in An. albimanus. Sodium, potassium, iron, and copper are present at higher concentrations during larval developmental stages. Two An. albimanus phenotypes that differ in their susceptibility to Plasmodium berghei infection were studied. The susceptible white stripe (ws) phenotype was named after a dorsal white stripe apparent during larval stages 3, 4, and pupae. During larval stage 3, ws larvae accumulate more iron and copper than the resistant brown stripe (bs) phenotype counterparts. A similar increase in copper and iron accumulation was also observed in the susceptible ws, but not in the resistant bs phenotype following P. berghei infection. Feeding ws mosquitoes with extracellular iron and copper chelators before and after receiving Plasmodium-infected blood protected from infection and simultaneously affected follicular development in the case of iron chelation. Unexpectedly, the application of the iron chelator to the bs strain reverted resistance to infection. Besides a drop in iron, iron-chelated bs mosquitoes experienced a concomitant loss of copper. Thus, the effect of metal chelation on P. berghei infectivity was strain-specific.
Effect of providing gender equality information on students’ motivations to choose STEM
Authors: Ikkatai Yuko , Inoue Atsushi , Minamizaki Azusa , Kano Kei , McKay Euan , Yokoyama Hiromi M.
Published: June 2021

The social climate for women studying STEM subjects is changing, but the proportion of women taking STEM subjects in Japan is small. Only 27.9% of university students in the department of science is women in 2019. In this study, we used an online survey to investigate whether randomly providing three types of gender equality information increased the motivation of junior high school students to choose STEM subjects and the motivation of their parents to support that choice. Information on STEM, especially about social equality, and information on math stereotypes and STEM occupations, increased students’ motivations for studying STEM. This suggests that providing gender equality information is an effective way to change students’ attitudes toward STEM.
Stakeholders engagement for solving mobility problems in touristic remote areas from the Baltic Sea Region
Authors: Kiryluk Halina , Glińska Ewa , Ryciuk Urszula , Vierikko Kati , Rollnik-Sadowska Ewa
Published: June 2021

Stakeholder participation is particularly important when dealing with mobility problems in touristic remote areas, in which there is a need to find sustainable solutions to increase transport accessibility. However, the literature lacks research linking the issues of establishing stakeholder groups with the most desirable level of involvement and methods ensuring involvement on the indicated level. The aim of the paper is to fill this gap on example of project dedicated to six Baltic Sea Regions. In the first stage key stakeholder groups were identified, then different methods and tools were proposed depending on levels of engagement of given group of stakeholders on solving the problems of local mobility. Two research methods were implemented–the case study and the content analysis of documents. The results of the research point to the existence of five key groups of stakeholders interested in solving transport problems of touristic remote areas: authorities, business and service operators, residents, visitors and others (like experts and NGOs). Among the five–authorities and business representatives–should be to a higher degree engaged. However, the main conclusion is that engagement local government units, when developing their own, long-term strategies for social participation, should adapt the selection of participation methods and techniques to a specific target group and the desired level of their involvement so as to include stakeholders in the co-decision processes as effectively as possible and achieve effective regional co-management.
Mediterráneo y Atlántico. Arqueometalurgia del bronce final y Primera Edad del Hierro en el poblado de el Morredón (Fréscano, Zaragoza)
Authors: Aranda-Contamina Paloma , Montero-Ruiz Ignacio , Rodanés Vicente José M.ª , Lorenzo Lizalde José Ignacio
Published: June 2021

Las excavaciones realizadas entre 2002 y 2004 en El Morredón, yacimiento del Bronce Final y la Primera Edad del Hierro situado en el valle del Huecha, Zaragoza, han permitido la revisión del yacimiento y el estudio de sus materiales inéditos mediante nuevas técnicas y metodologías. El repertorio metálico del yacimiento se identifica con un conjunto de ámbito doméstico, mayoritariamente realizado en bronce, de reducida tipología, en el que predominan los objetos de adorno seguidos de armas y útiles de trabajo. Con el objetivo de conocer la composición de estos materiales se han realizado análisis mediante fluorescencia de rayos X –XRF–. Se ha documentado la presencia de dos aleaciones distintas: bronce binario de Cu-Sn y ternario, Cu-Sn-Pb. Esta composición apunta posibles conexiones con el Bajo Ebro y, a su vez, con la Meseta Sur, Levante o Andalucía, mientras la tipología de algunas piezas parece vinculada a la tradición del Bronce Atlántico o Centroeuropeo. La producción metalúrgica que se desarrolló en el propio poblado es una muestra más de la confluencia de tradiciones: mediterránea y atlántica, que cada vez se detecta con mayor claridad e intensidad en este territorio.
La voz a través del cuerno. El paradigma documental del carnyx
Authors: Sopeña Genzor Gabriel
Published: June 2021

Tanto las fuentes literarias griegas y latinas como la iconografía céltica demuestran la gran relevancia del carnyx –como paradigma de la feritas, en la visión general de helenos y romanos– y como exponente del decorum, para los propios nativos. De esta manera, el ancestral cuerno de guerra en bronce de los celtas –al que debe sumarse la peculiaridad de las trompetas celtibéricas en arcilla– exhibe una relevancia arqueológica y simbólica definitoria, relacionada con el espíritu y el ethos de estas gentes de la Europa protohistórica. Los descubrimientos del s. XXI permiten la reconstrucción de algunos prototipos que muestran un cierto potencial musical, únicamente en nuestros términos contemporáneos por supuesto, además de su destacada y primigenia finalidad militar, de advertencia e intimidación. La decoración zoomorfa de sus altavoces caracteriza estas piezas como únicas en la Historia de la Organología: un rasgo definitorio relacionado con su función como traductoras de una sacra dictio en el panorama sacrificial de la esfera bélica celta.
On an Unusual Female Head from Italica (Santiponce, Seville)
Authors: Ojeda David
Published: June 2021

A previously unpublished female head, which decorated the residential area of the Hadrianic extension of Italica, was found in excavations carried out by A. Parladé in 1929/1930 in the proximity of the House of the Neptune Mosaic. Its most particular characteristic is that the upper part was formed by a separately worked segment of hair. This head is the first to be documented in Hispania made with this technique, in which a tenon is located in the back of the head. As it is an unusual technique, other examples in the Empire of similar characteristics are detailed in a list. Finally, a series of arguments are given to date the object in the second quarter of the 2nd century AD and include it in the group of ideal heads made during that time in Italica.
Un nuevo pavimento romano de la Baetica: el llamado Mosaico de los Delfines de Naeva (Cantillana, Sevilla)
Authors: Vargas-Vázquez Sebastián , López Monteagudo Guadalupe , Valiente de Santis José Antonio
Published: June 2021

Se analiza un mosaico recientemente descubierto en la antigua ciudad de Naeva, cuya cronología podría inscribirse en el s. III d. C. por sus características estilísticas y por los datos derivados del estudio de  materiales que evidencian el abandono del edificio en el que se enmarca este pavimento musivo a finales  de dicha centuria. El trabajo profundiza, además, en la principal particularidad del mosaico, que estriba en su aspecto formal, al cubrir toda la superficie del impluvium y del brocal de un pozo, de un atrium columnado posiblemente perteneciente a una importante domus urbana. La temática representada en el mosaico, dotado de  rica policromía, compagina los elementos de agua y tierra mediante la representación, localizada en el suelo,  de una abundante fauna íctica y de una singular escena de sátiros y ménades enmarcados en un ambiente de espesas vides, desarrollada en torno al brocal del pozo. A todo ello habría que sumar el carácter efectista del conjunto, provocado por el agua y la posible inundación del centro del atrio, preparado para contener en momentos determinados una lámina de agua que concedería mayor realismo a la escena marina.
Risk factors for Lassa fever infection among survivors at the Federal Medical Center, Owo, Ondo State, Nigeria
Authors: Ilesanmi Olayinka Stephen , Owoeye-Lawal Oluwatosin Temitope , Aro Adewale Johnson , Afolabi Aanuoluwapo Adeyimika , Kareem Adesola Olawumi , Abejegah Chukwuyem , Ayodeji Oladele Oluwafemi
Published: June 2021

Background and Aim: There is insufficient information about the successfully managed Lassa fever (LF) patients in Nigeria. This study aimed to utilize the One Health approach to identify the risk factors for LF infection among LF patients who were managed and on follow-up at the Federal Medical Center, Owo, Ondo State, Nigeria.

Materials and Methods: A cross-sectional study was done on 101 LF survivors who were managed and on follow-up at the Federal Medical Center. The data were collected using a semi-structured interviewer-administered questionnaire. The respondents were assessed for symptoms and factors that might have predisposed them to LF, and the data were analyzed with SPSS version 23 (IBM Corp., NY, USA). Those who had more than 3 identifiable risks were categorized as high risk. Descriptive statistics were done, and the association between sociodemographic characteristics and high risk was explored using Chi-square test.

Results: The median age of the respondents was 33 years (8-85 years); 62 (61.4%) were male, and 93 (92.1%) have heard of LF before diagnosis. The perceived cause of LF infection among the respondents included the consumption of food contaminated by rats' feces among 57 (56.4%) persons, while 16 (15.8) attributed their infection to contact with LF-infected persons. Among the respondents with primary education and below, 5 (29.4%) were at higher risk for LF infection compared to 7 (8.3%) with secondary education and above (p=0.014).

Conclusion: The mass media and other sources of information should be well-harnessed in the communication of risks and preventive practices for LF. Public information campaigns should be organized to discourage bush burning in affected communities.
II. Rákóczi Ferenc és a veritas-gondolat
Authors: Knapp Éva
Published: June 2021

II. Rákóczi Ferenc életművének nincs olyan része, amelyben ne foglalkozna valamilyen formában a veritas kérdésével. Jóllehet írásaiban eltérő arányban és hangsúllyal, folyamatosan keveredik a történelmi, teológiai, morális, logikai és filozófiai gondolkodás, s a vallási, politikai és etikai irodalom műfajai „összeötvözve” jelennek meg, a művek ebben a vonatkozásban egymásra utalnak. Rákóczi Augustinus nyomán, kamalduli-janzenista ösztönzésre, grosbois-i olvasmányélmények és a rodostói magánkönyvtár felhasználásával foglalkozott az igazság kérdésével. Az alapvetően bibliai és augustinusi eredetű, Janseniuséhoz és több más szerzőéhez közel álló fogalomhasználat révén a művek többféle igazságfelfogással szembesítenek, miközben a szerző folyamatosan azt igyekszik bizonyítani, hogy ezen a téren is önállóan gondolkodik, és véleménye különbözik másokétól. Rákóczi veritas-koncepciója éppúgy szinkretista jellegű, mint a bűnről, a kegyelemről, a szabad akaratról, az eleve elrendelésről és a kiválasztottságról alkotott felfogása. A veritas Rákóczi számára személyes fogalom, egyben a művek alapvető tényezője és fontos szervező elve, de nem egyenlő mértékben, s nem vált olyan mértékben rögeszmévé, mint például Saint-Simonnál.
„Gondold azt, hogy nem is levelet, hanem [...] az emberi élet minden kényelmét küldöd.”
Authors: Frazer-Imregh Monika
Published: June 2021

Az alábbiakban Poliziano és Girolamo Donato levélváltását közlöm bevezető tanulmánnyal. A levelezés elemzését megelőzően vázolom Donato életpályáját, amelyben már utalok kettejük kapcsolódási pontjaira is. Ezek az antik irodalom és filozófia iránt való rajongáson túl két közös barát: Ermolao Barbaro valamint Giovanni Pico della Mirandola személye, akinek a Donatóhoz szóló levele a levélfüzér elindítója is volt. Poliziano ez utóbbit beillesztette az Epistolae II. könyvében kettejük levelezése elé, így itt is ezzel indítjuk a levélláncot. A kifinomult latin nyelvezetű, játékos és tudós „párbeszéd” fő tematikája a kéziratkölcsönzésen, -másoláson és a folyamatban levő (párhuzamos!) fordításaikon túl egzisztenciális kérdések: fontos vagy apró-cseprő teendőik mennyi időt hagynak a kutatásra és az alkotásra? Továbbá világos képet kapunk arról, hogy a reputáció milyen húsbavágó jelentőségű egy humanista számára.
„A Tesoro elkezdődik”
Authors: Ótott Noémi
Published: June 2021

Brunetto Latini firenzei irodalmár és politikus Il Tesoretto című tankölteménye a szerző által egyes szám első személyben elmesélt allegorikus látomástörténete. Mivel sem az allegorikus–didaktikus költemény, sem a szerző más műveinek keletkezési idejét, azok pontos egymás utáni sorrendjét nem ismerjük, így a tanulmány először a datálás komplex kérdéskörével foglalkozik, kiemelve azon eseteket, amelyek az interpretáció tartalmi vonatkozásait is érintik.Amikor az Il Tesorettóban Latini a saját nevét adja a narrátornak és a főszereplőnek is, egy olyan komplex univerzumba vonja be az olvasót, amely jóval túlmutat a költemény keretein. Nemcsak annak tartalmára van hatással, hanem a külső valóságot is manipulálja. Ezért kísérletet teszek arra, hogy elkülönítsem a szerző „hangjait” a szövegben és rendszerbe illesszem őket. Munkámban végig a történelmi személy, Brunetto Latini alakjára koncentrálok: hogyan jelenik meg a történelmi kontextust életrajzi elemekkel és valós korabeli események leírásával megteremtő első rész narrátoraként, valamint milyen szerepet tölt be a tanköltemény ajánlásában.
Application of transparent microperforated panel to acrylic partitions for desktop use: A case study by prototyping
Authors: Sakagami Kimihiro , Kusaka Midori , Okuzono Takeshi , Kido Shigeyuki , Yamaguchi Daichi
Published: June 2021

There are various measures currently in place to prevent the spread of COVID-19; however, in some cases, these can have an adverse effect on the acoustic environment in buildings. For example, transparent acrylic partitions are often used in eating establishments, meeting rooms, offices, etc., to prevent droplet infection. However, acrylic partitions are acoustically reflective; therefore, reflected sounds may cause acoustic problems such as difficulties in conversation or the leakage of conversation. In this study, we performed a prototyping of transparent acrylic partitions to which a microperforated panel (MPP) was applied for sound absorption while maintaining transparency. The proposed partition is a triple-leaf acrylic partition with a single acrylic sheet without holes between two MPP sheets, as including a hole-free panel is important to a possible droplet penetration. The sound absorption characteristics were investigated by measuring the sound absorption in a reverberation room. As the original prototype showed sound absorption characteristics with a gentle peak and low values due to the openings on the periphery, it was modified by closing the openings of the top and sides. The sound absorption performance was improved to some extent when the top and sides were closed, although there remains the possibility of further improvement. This time, only the sound absorption characteristics were examined in the prototype experiments. The effects during actual use will be the subject of future study.
Hortas comunitárias nos vazios urbanos como estratégia de requalificação de centros urbanos sustentáveis e saudáveis
Authors: Lima Márcia Azevedo de , De Freitas Nerbas Patrícia
Published: June 2021

Com base nos objetivos de desenvolvimento sustentável da Agenda 2030, entende-se a importância de buscar soluções que ajudem a mitigar os problemas da segurança alimentar que têm se intensificado com a pandemia da COVID-19, através do desenho mais adequado de nossas cidades. Assim, propõe-se a requalificação de centros urbanos como uma medida para o desenvolvimento urbano sustentável, uma vez que impõe o desafio de refazer a cidade existente, reinventando-a, de modo inteligente e inclusivo. Nesse sentido, as hortas urbanas podem ocupar os vazios urbanos e os miolos de quarteirão de centros urbanos consolidados. As hortas urbanas tem sido apontadas como importantes espaços multiuso, não só para produzir alimentos, mas também para disponibilizar espaços de lazer, essenciais para cidades que busquem a sustentabilidade e responsividade às necessidades dos habitantes locais. Concluindo, este artigo pretende fornecer subsídios para projetos de requalificação de centros urbanos, sugerindo a estratégia de inclusão das hortas urbanas em vazios urbanos e miolos de quarteirão ser replicada, considerando todos os seus possíveis benefícios, para melhorar a qualidade de vida nos centros urbanos e contribuir para a produção de cidades sustentáveis e saudáveis.
Prácticas de sostenibilidad ambiental y energética: experiencias con una escuela agraria en el noroeste de la provincia de Buenos Aires (Argentina)
Authors: Yuln Melina
Published: June 2021

En este artículo se presenta la experiencia de un proyecto de extensión universitaria orientado a implementar prácticas de sostenibilidad en una escuela secundaria de formación agraria. Para ello se pone en contexto el rol de la extensión universitaria y la cuestión ambiental desde la Universidad Nacional del Noroeste de la Provincia de Buenos Aires, así como el posicionamiento del equipo extensionista, proveniente del ámbito de la investigación. Se desarrollarán la propuesta y el impacto del proyecto tanto al interior del equipo universitario como su vínculo con la comunidad educativa. Se ensayarán algunas conclusiones destacando la incorporación de prácticas y acciones sostenibles en ámbitos educativos para colaborar con objetivos de lucha contra el cambio climático, aumentar la seguridad energética y favorecer la inclusión social.
Estrategias de base agroecológica para y con agricultores familiares de la región Pampeana. Construyendo faros agroecológicos
Authors: Cieza Ramon , Sánchez Vallduví Griselda , Tamagno Nora , Sarandón Santiago
Published: June 2021

Este trabajo describe y analiza un proceso de intervención realizada por un equipo interdisciplinario de la Facultad de Ciencias Agrarias y Forestales de la Universidad Nacional de la Plata, Argentina, cuyo objetivo fue difundir, desarrollar y evaluar estrategias y tecnologías de base agroecológica apropiadas para y con productores familiares de la región Pampeana. Se describen los aportes que realizó el proyecto a partir del acompañamiento, intercambio de saberes y fortalecimiento de sistemas productivos agroecológicos en el territorio. Respecto del desarrollo de la experiencia, se analiza la importancia de generar metodologías apropiadas para ampliar los conocimientos acerca del funcionamiento y puesta en práctica de sistemas de base agroecológica. Uno de los aprendizajes más significativos a partir de la experiencia fue la necesidad de generar cambios profundos en las estrategias de investigación, extensión y formación de profesionales con una nueva mirada, en sintonía con la incorporación del enfoque agroecológico como nuevo paradigma de las ciencias agropecuarias.
Supporting Biomedical Research Training for Historically Underrepresented Undergraduates Using Interprofessional, Nonformal Education Structures
Authors: Marriott Lisa K. , Raz Link Aaron , Anitori Roberto P , Blackwell Ernest A , Blas Andrea , Brock Jennifer , Burke Tracey K , Burrows Julia A , Cabrera Alexis P. , Helsham Derek , Liban Lorna B , Mackiewicz Marilyn R , Maruyama Mika , Milligan-Myhre Kathryn C.A. , Panelinan Perry J.C. , Hattori-Uchima Margaret , Reed Russell , Simon Ben E. , Solomon Beylul , Trinidad Alma M.O. , Wyatt Letisha R. , Delgado Covarrubias Alonso , Zell Adrienne , Keller Thomas E , Morris Cynthia , Crespo Carlos J
Published: June 2021

Research experience provides critical training for new biomedical research scientists. Students from underrepresented populations studying science, technology, engineering, and mathematics (STEM) are increasingly recruited into research pathways to diversify STEM fields. However, support structures outside of research settings designed to help these students navigate biomedical research pathways are not always available; nor are program support components outside the context of laboratory technical skills training and formal mentorship well understood. This study leveraged a multi-institutional research training program, Enhancing Cross-Disciplinary Infrastructure and Training at Oregon (EXITO), to explore how nine institutions designed a new curricular structure (Enrichment) to meet a common goal of enhancing undergraduate research training and student success. EXITO undergraduates participated in a comprehensive, 3-year research training program with the Enrichment component offered across nine sites: three universities and six community colleges, highly diverse in size, demographics, and location. Sites’ approaches to supporting students in the training program were studied over a 30-month period. All sites independently created their own nonformal curricular structures, implemented interprofessionally via facilitated peer groups. Site data describing design and implementation were thematically coded to identify essential programmatic components across sites, with student feedback used to triangulate findings. Enrichment offered students time to critically reflect on their interests, experiences, and identities in research; network with peers and professionals; and support negotiation of hidden and implicit curricula. Students reported the low-pressure setting and student-centered curriculum balanced the high demands associated with academics and research. Core curricular themes described Enrichment as fostering a sense of community among students, exposing students to career paths and skills, and supporting development of students’ professional identities. The non-formal, interprofessional curricula enabled students to model diverse biomedical identities and pathways for each other while informing institutional structures to improve diverse undergraduate students’ success in academia and research.
Análisis del desempeño de la potencia y el torque de un motor diésel operando con mezclas de biodiésel de palma
Authors: Herrera Susa Daniel Andrey , Bermúdez Santaella José Ricardo , Castilla Álvarez Carlos Eduardo
Published: June 2021

Contexto: Hay una tendencia en la sociedad moderna que se basa especialmente en el desarrollo de nuevos biocombustibles, direccionada específicamente hacia el campo de los motores de combustión interna, estableciéndose como punto central la pérdida de su rendimiento térmico. Este es uno de los principales retos, donde la investigación se dinamiza en forma compleja e importante. En este contexto, esta investigación fortalece esta área del conocimiento y determina el comportamiento del desempeño de un motor monocilíndrico encendido por compresión con mezclas entre el diésel convencional y un biodiesel producido con técnicas innovadoras.
Método: En este trabajo se realizó un análisis en un banco de pruebas para motores de combustión interna tipo Diésel, donde se caracterizó y se determinó la eficiencia del motor utilizando diésel y diferentes mezclas como la B2, B5, B10, B20, B50 y B100, el número determina el porcentaje de biodiésel en la mezcla. El biodiésel utilizado contó como base el aceite de palma africana y se obtuvo por medio de la tecnología de radiación por microondas. Estas pruebas fueron realizadas utilizando la norma SAE J1349. La toma de datos como potencia, torque, consumo de combustibles y temperatura indicaron el desempeño del motor, lo que a su vez determinó los efectos de los diferentes combustibles en estudio.
Resultados: Al desarrollar las pruebas y realizar su análisis se evidenció que para todas las mezclas analizadas, la combustión ocurrió sin complicaciones; además de esto, al incrementar el porcentaje de biocombustible en la mezcla, el consumo de combustible reportó aumentos mayores o iguales al 20% del consumo de combustible, así como pérdidas de potencia en el rango del 40%. Por lo tanto, el uso tecnología con microondas se mostró más eficiente para su producción.
Conclusiones: Con la metodología aplicada, se determinó que, para la mezcla B20, los valores de la potencia fueron los más estables en términos de rendimiento térmico. En el contexto del comparativo de los combustibles patrón, diésel colombiano y venezolano, sometidos bajos las mismas condiciones de operación, se obtuvo que el combustible tipo diésel venezolano presenta mejores características de rendimiento en cuanto a su potencia, torque y estabilidad térmica. Con respecto al consumo específico del combustible obtenido, se observa el aumento con mayor porcentaje de mezcla de biodiésel, esto directamente proporcional a la pérdida de potencia.
Recovery and Incorporation of expanded polystyrene SolidWaste in Lightweight Concrete
Authors: Espinoza-Merchán María Paula , Torres-Parra Laura Juliana , Rojas-Arias Nicolas , Coha-Vesga Pablo Miguel
Published: June 2021

Context: The high consumption of parts made from expanded polystyrene (EPS) generates environmental problems when disposed. Due to its low density and the low possibility of being utilized in other applications after its disposal, it is necessary to generate an alternative for the recovery and application of this type of waste. This work aims to generate an alternative in the application of EPS waste, particularly as a coarse aggregate in the manufacturing of lightweight concrete.
Method: This study used discarded EPS containers as raw material. The material was cleaned, crushed and subsequently reduced in volume by applying acetone, generating pieces of polystyrene (R-PS) to be applied as a coarse aggregate for the manufacturing of lightweight concrete in different proportions. In addition, the pieces were subjected to a chemical attack process in order to observe their behavior.
Results: The results show the degree of volume reduction of the EPS pieces by using different acetone ratios, establishing the best degree of reduction (in volume) of this material. Likewise, chemical attack tests show the behavior of R-PS against different agents in R-PS samples. Meanwhile, the failure tests on different concrete samples determine the best R-PS ratio as coarse aggregate for the manufacturing of lightweight concrete.
Conclusions: The data obtained in this study show that the application of acetone on EPSW samples reduces its volume by up to 55 %. Concrete failure tests show that an optimum P-RS addition value, to be used as an aggregate in the manufacturing of lightweight concrete, is 7 %. This improves its resistance to chemical agents and weight reduction without significantly reducing the mechanical properties of concrete.
Influencia de los suelos en la dinámica de transferencia de nutrientes en la interfase suelo-agua en un embalse tropical
Authors: Arias Tatiana , Rodriguez Loaiza Diana Catalina , Peñuela Gustavo
Published: June 2021

Contexto: La construcción de un embalse implica inundar diferentes tipos de suelo, lo cual genera un gradiente de concentración que favorece la transferencia de nutrientes desde el suelo hacia la columna de agua. Los suelos proveen al embalse una entrada importante de nutrientes, lo cual, junto con otras fuentes, contribuye a futuro al proceso de eutrofización.
Método: Este estudio evaluó, bajo condiciones anóxicas, la dinámica de transferencia del nitrógeno y el fósforo en la interfase suelo-agua, empleando tres tipos de suelos, caracterizados previo al proceso de inundación de un embalse tropical. Los ensayos se realizaron por medio de ensayos batch, los cuales se monitorearon por periodos de 30 días.
Resultados: Los resultados indicaron que la máxima concentración de fósforo en la interfase agua-suelo se alcanzó en el día 24, la de nitrógeno amoniacal en el día 15 y la de nitrato en el día 30, donde el suelo asociado a la cobertura vegetal rastrojo alto tuvo el mayor aporte de nutrientes en todos los ensayos.
Conclusiones: Se comprobó que la transferencia de nutrientes está asociada con la degradación de la materia orgánica presente en los suelos y a la reducción del oxígeno disuelto, lo que favorece una mayor liberación de amonio del suelo al agua. Además, se encontró que el gradiente de transferencia fue proporcional al tipo de textura del suelo.
Agradecimientos: Los autores agradecen el apoyo financiero brindado por el Programa Científico Colombiano, en el marco de la convocatoria de propuestas Ecosistema Científico (Contrato No. FP44842- 218-2018). Además, agradecen a la empresa ISAGEN y al grupo GDCON de la Universidad de Antioquia por el financiamiento a través del acuerdo 47/26: “Cuantificación de las emisiones de GEI para el Proyecto Hidroeléctrico Sogamoso”.
Mathematical Model for Centralized Supply Chains with Decisions Involving Shared Resources
Authors: Franco Carlos , Guzmán Cortés Diana , Figueroa García Juan Carlos
Published: June 2021

Context: Cooperation in supply chain management is an important issue considering the global performance of the different echelons of a specific supply chain. In this sense, applying logistic strategies such as VMI (Vendor Managed Inventory) allows a system to manage distribution processes from a central point or depot. Additionally, the components of the chain work more closely with it, which allows increasing global performance, instead of individually developing each sector.
Method: A stochastic mathematical model is proposed which considers a network of customers, where products are delivered from a central depot. These customers can share part of their product with the central depot for redistribution, aiming to minimize shortage for other customers. A mathematical model is proposed which includes the elements involved in distribution processes. It is then reformulated to consider shortage and the linearization of some of its elements.
Results: Results show that implementing or adapting logistic strategies, such as managing from a central point and sharing resources along the supply chain, allows companies to reduce the complexity of some decisions and improve performance.
Conclusions: Implementing logistic strategies such as centralized management and sharing resources along a supply network allows companies to reduce the complexity of some decisions and, in turn, improve their performance.
Design and Prototyping of an Electronic Cane for an Indoor Guide System for the Blind
Authors: Gonzalez Gomez Arnaldo Andres , Díaz Gutiérrez Yesid , Flórez Barboza Wilson David
Published: June 2021

Context: Blindness is a physical-sensory disability that limits the ability of affected people to carry out daily-life activities and deteriorates their quality of life. It is estimated that there are 296.000 blind people throughout the Colombian territory.
Method: This article presents the development of an electronic baton that works with a system of guiding lines and information points, together with an application for mobile devices. This research is based on the quantitative method, seeking to investigate the characteristics of the device in terms of its use. A descriptive investigation is performed which can be classified as ex post facto.
Results: As a result, a device is developed which can guide a blind person to their destination in closed areas, although the time used for movement is greater compared to a journey with human assistance.
Conclusions: There are solutions aimed at guiding a blind person in closed spaces that achieve this goal, although they require bulky hardware, which prevents the dimensions of the device from resembling those of the walking sticks normally used as a tool by the blind population. This limits the natural use of this kind of devices.
Lime paintings in Treatises and Construction Technical Manuals in Portugal from 1880 to 1931 – An historical review
Authors: Gil Milene
Published: June 2021

A review of the lime painting technique is made based on five Treatises and Construction Technical Manuals that were published in Portugal between 1880 and 1930 and were or became a reference in technical and professional education. The goal is to document the history of one of the most popular types of painting in Portuguese Building Heritage until about 1960, whose testimonies still remaining in historic centers should be studied for the purposes of registration and rehabilitation works. This survey enabled to ascertain details of the executants, of the materials and the know-how which are still little known today and to highlight the paradigm shift from what was once considered a type of coarse painting that only gave rudimentary and monotonous tones.
T cell epitopes of SARS-CoV-2 spike protein and conserved surface protein of Plasmodium malariae share sequence homology
Authors: Hassan Md. Mehedi , Sharmin Shirina , Hong Jinny , Lee Hoi-Seon , Kim Hyeon-Jin , Hong Seong-Tshool
Published: June 2021

Since its emergence in late 2019, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been spreading remarkably fast worldwide. Effective countermeasures require the rapid development of data and tools to monitor its spread and better understand immunogenic profile. However, limited information is available about the tools and target of the immune responses to SARS-CoV-2. In this study, we excogitated a new approach for analyzing phylogenetic relationships by using the whole prototype proteome sequences. Phylogenetic analysis on the whole prototype proteome sequences showed that SARS-CoV-2 was a direct descendant of Bat-CoV and was closely related to Pangolin-CoV, Bat-SL-CoV, and SARS-CoV. The pairwise comparison of SARS-CoV-2 with Bat-CoV showed an unusual replacement of the motif consisting of seven amino acids (NNLDSKV) within the spike protein of SARS-CoV-2. The replaced motif in the spike protein of SARS-CoV-2 was found in 12 other species, including a conserved surface protein of a malaria-causing pathogen, Plasmodium malariae. We further identified the T and B cell epitope sequence homology of SARS-CoV-2 spike protein with conserved surface protein of P. malariae using the Immune Epitope Database and Analysis Resource (IEDB). The shared immunodominant epitopes may provide immunity against SARS-CoV-2 infection to those previously infected with P. malariae.