bluuebunny/crossref_metadata_2025 huggingface dataset:
Effects of Polystyrene Microplastics on Growth and Toxin Production of Alexandrium pacificum
Authors: Liu Chao , Qiu Jiangbing , Tang Zhixuan , Hu Hong , Meng Fanping , Li Aifeng
Published: April 2021

Microplastics (MP) widely distributed in aquatic environments have adverse effects on aquatic organisms. Currently, the impact of MP on toxigenic red tide microalgae is poorly understood. In this study, the strain of Alexandrium pacificum ATHK, typically producing paralytic shellfish toxins (PST), was selected as the target. Effects of 1 and 0.1 μm polystyrene MP with three concentration gradients (5 mg L−1, 25 mg L−1 and 100 mg L−1) on the growth, chlorophyll a (Chl a), photosynthetic activity (Fv/Fm) and PST production of ATHK were explored. Results showed that the high concentration (100 mg L−1) of 1 μm and 0.1 μm MP significantly inhibited the growth of ATHK, and the inhibition depended on the size and concentration of MP. Contents of Chl a showed an increase with various degrees after MP exposure in all cases. The photosynthesis indicator Fv/Fm of ATHK was significantly inhibited in the first 11 days, then gradually returned to the level of control group at day 13, and finally was gradually inhibited in the 1 μm MP treatments, and promotion or inhibition to some degree also occurred at different periods after exposure to 0.1 μm MP. Overall, both particle sizes of MP at 5 and 25 mg L−1 had no significant effect on cell toxin quota, and the high concentration 100 mg L−1 significantly promoted the PST biosynthesis on the day 7, 11 and 15. No significant difference occurred in the cell toxin quota and the total toxin content in all treatments at the end of the experiment (day 21). All MP treatments did not change the toxin profiles of ATHK, nor did the relative molar percentage of main PST components. The growth of ATHK, Chl a content, Fv/Fm and toxin production were not affected by MP shading. This is the first report on the effects of MP on the PST-producing microalgae, which will improve the understanding of the adverse impact of MP on the growth and toxin production of A. pacificum.
No-Slip Boundary Conditions for Electron Hydrodynamics and the Thermal Casimir Pressure
Authors: Hannemann Mandy , Wegner Gino , Henkel Carsten
Published: April 2021

We derive modified reflection coefficients for electromagnetic waves in the THz and far infrared range. The idea is based on hydrodynamic boundary conditions for metallic conduction electrons. The temperature-dependent part of the Casimir pressure between metal plates is evaluated. The results should shed light on the “thermal anomaly,” where measurements deviate from the standard fluctuation electrodynamics for conducting metals.
Bouncing Quantum Cosmology
Authors: Pinto-Neto Nelson
Published: April 2021

The goal of this contribution is to present the properties of a class of quantum bouncing models in which the quantum bounce originates from the Dirac canonical quantization of a midi-superspace model composed of a homogeneous and isotropic background, together with small inhomogeneous perturbations. The resulting Wheeler-DeWitt equation is interpreted in the framework of the de Broglie-Bohm quantum theory, enormously simplifying the calculations, conceptually and technically. It is shown that the resulting models are stable and they never get to close to the Planck energy, where another more involved quantization scheme would have to be evoked, and they are compatible with present observations. Some physical effects around the bounce are discussed, like baryogenesis and magnetogenesis, and the crucial role of dark matter and dark energy is also studied.
Persistence of Anti-ZIKV-IgG over Time Is Not a Useful Congenital Infection Marker in Infants Born to ZIKV-Infected Mothers: The NATZIG Cohort
Authors: Coutinho Conrado , Fernandes Juliana , Yamamoto Aparecida , Negrini Silvia , Negrini Bento , Teixeira Sara , Amaral Fabiana , Motta Márcia , Bárbaro Adriana , Aragon Davi , Montoya Magelda , Harris Eva , Duarte Geraldo , Mussi-Pinhata Marisa ,   for the NATZIG Cohort Study Team
Published: April 2021

Confirming ZIKV congenital infection is challenging because viral RNA is infrequently detected. We compared the presence of anti-ZIKV-IgM and the persistence of anti-ZIKV-IgG antibodies over 18 months in two cohorts of infants born to ZIKV-infected mothers: Cohort one: 30 infants with typical microcephaly or major brain abnormalities (Congenital Zika Syndrome-CZS); Cohort two: 123 asymptomatic infants. Serum samples obtained within 6 months of age were tested for anti-ZIKV-IgM. Anti-ZIKV-IgG was quantified in sequential samples collected at birth, 3–6 weeks, 3, 6, 12, and 18 months. ZIKV-RNA was never detected postnatally. Anti-ZIKV-IgM antibodies were detected at least once in 15/25 (60.0%; 95%CI: 38.7–78.9) infants with CZS and in 2/115 (1.7%; 95%CI: 0.2–6.1) asymptomatic infants. Although anti-ZIKV-IgG was always positive within 3–6 weeks of age, IgG levels decreased similarly over time in both cohorts. IgG levels decreased similarly in ZIKV-IgM-positive and ZIKV-IgM-negative CZS infants. Differently from other congenital infections, IgM would fail to diagnose 40% of severely symptomatic infants, and the persistence of IgG is not a useful marker for discriminating congenital infection among infants exposed to maternal ZIKV infection.
A Versatile qPCR for Diagnosis of Leporid Gammaherpesvirus 5 Using Evagreen® or Taqman® Technologies
Authors: Abade dos Santos Fábio A. , Carvalho Carina L. , Peleteiro Maria C. , Parra Francisco , Duarte Margarida D.
Published: April 2021

In late 2019, the first herpesvirus in the genus Lepus, named leporid gammaherpesvirus 5 (LeHV-5) was described. At the time, herpetic typical lesions were observed in hares infected by the myxoma virus, which is known to induce immunosuppression. Though the real impact of LeHV-5 is still poorly understood, since it affects reproduction, it poses an additional threat to the already fragile populations of Iberian hare, demanding prevalence investigations. In this article, we describe the first quantitative molecular method for LeHV-5 detection, using either Taqman or the EvaGreen systems. This method has excellent sensitivity and specificity, it is able to detect 2.1 copies of LeHV-5 DNA and was validated with an internal control targeting the 18S rRNA gene, allowing monitoring extraction and PCR amplification efficiencies.
Research on Sustainable Development Evaluation of Reservoir Water Source Area in Island Area
Authors: Yu Jo-Hung , Lin Hsiao-Hsien , Lo Yu-Chih , Tseng Kuan-Chieh , Hsu Chin-Hsien
Published: April 2021

This study takes Taiwan’s Sun Moon Lake Reservoir as the research object to discuss the sustainable development decision-making of the reservoir water source area in the island area. The grounded theory was adopted to construct the framework; 835 questionnaires were analyzed by statistical test; 10 interviewees’ feelings were collected through interviews and discussions, and multiple verification methods were used for exploration. Conclusion: The study found that the current development of the reservoir water source area of the outlying islands has brought much garbage; affecting the quality of the natural environment; lake; and water source; caused the disappearance of distinctive culture and architecture. The poor interaction between businesses and communities has led to an overlap in the types of industries, consumer goods, attractions and a lack of transportation and medical facilities, affecting people’s desire to travel. The government’s future decisions include: Increasing the variety of consumer goods; improving medical and transportation facilities; preserving unique culture and architecture; linking foreign-invested enterprises with community interactivity; enhancing local people’s interaction; and compensating for the deficiencies in human resources for industrial development are the key points for future improvement of the reservoir water source area of the outlying islands.
Novel Protocol for Acute In Situ Ecotoxicity Test Using Native Crustaceans Applied to Groundwater Ecosystems
Authors: Castaño-Sánchez Andrea , Malard Florian , Kalčíková Gabriela , Reboleira Ana Sofia P. S.
Published: April 2021

Current standardized laboratory test protocols use model species that have limitations to accurately assess native species responses to stressors. We developed and tested a novel acute in situ protocol for testing field-collected organisms. We used Asellus aquaticus and NaCl as a reference toxicant to test for the effects of location (laboratory vs. in situ), medium (synthetic vs. field water), substrate (presence vs. absence), and protocol replicability. We further tested the protocol using groundwater-adapted isopods: Proasellus assaforensis for the effect of location, P. cavaticus of medium and P.lusitanicus of substrate. Our results showed that A.aquaticus’ lethality obtained with the novel acute in situ protocol did not significantly differ from those from laboratory testing. However, laboratory tested P.assaforensis showed a higher sensitivity, suggesting that its acclimation to laboratory conditions might have pernicious effects. A. aquaticus and P. cavaticus showed a higher mortality using synthetic medium in situ and under laboratory conditions, which overestimated the stressor’s effect. Besides, substrate use had no significant effect. The novel acute in situ protocol allows the use of native species under realistic scenarios. It is particularly well adapted for assessing the risk of groundwater ecosystems but it can be applied to a wide range of ecosystems.
Designing Mini-Games as Micro-Learning Resources for Professional Development in Multi-Cultural Organisations
Authors: Arnab Sylvester , Walaszczyk Ludmila , Lewis Mark , Kernaghan-Andrews Sarah
Published: April 2021

The need for self-directed learning for professional development drives an increase in the delivery of easy to use ‘just-in-time’ resources that respond to the often-dynamic workplace and work culture. This is especially important in the era of globalisation, when the number of employees, who are culturally diverse, increases each year. Most medium and large companies operate in an international environment, and this is due to the expansion of international enterprises with branches in various countries that requires cooperation with foreign clients, and the employment of foreign nationals in their companies. In order to guarantee the effectiveness of workings in companies, there is a need for continuous education in the aspect of the cultural diversity. This paper explores micro-learning, which focuses on delivering brevity through bite-sized learning units or short-term learning activities. Learning content in this case can take many forms, from text to interactive multimedia. These contents are often created on demand, which can sometimes be less contextualised and pedagogically informed. Based on a case study of the need for training on cultural risks in multi-cultural organisations, this paper focuses on the design of mini-games as playful learning resources for supporting an online learning platform that has been developed as a response to this training need. Fifteen mini-games have been developed to complement eight main topics related to cultural risks and to promote reflection, practice and the self-assessment of knowledge acquired through the platform. The main eight topics represent the risk areas identified that include cultural awareness, understanding different cultures, communication, learning styles, hierarchy, team-working, qualities in the working place, and stereotypes through a survey carried out with personnel (n=154) from multi-cultural organisations across five countries - Cyprus, Italy, Latvia, Poland, and the UK. The discussions include unpacking the mapping of pedagogical and gameful design considerations based on Arnab et al.‘s (2015) Learning Mechanics-Game Mechanics Mapping (LMGM) model. The paper also discusses the findings from the testing of the online platform across 5 countries including 166 participants (two-step testing). The insights provided will be valuable to researchers, practitioners, designers, and developers of micro-learning resources.
The Chemistry of van de Moer Test for Cytisine
Authors: Sánchez-Viesca Francisco , Gómez Reina
Published: April 2021

Cytisine is an alkaloid with biological activity that is used as medication for smoking cessation treatment. It is a quinolizidine derivative, one ring being 2-pyridinone, and there is a third cycle, a disubstituted piperidine. Thus, the analytical chemistry of this compound is relevant. In this communication we provide the chemistry involved in the spot test for cytisine identification by means of ferric chloride/hydrogen peroxide. The electron flow, step by step, is given from the alkaloid to the final colored products. The sequence is based on the chemical properties of the substrate and reagents, disclosing the series of reactions occurring in this assay. The process is in accordance with the experimental results. We also give the mechanism of cytisine degradation, from a quinolizidine system to 6,8-dimethyl quinoline, which involves an interesting rearrangement.
The role of NOD-like receptors of innate immune cells in the pathogenesis of chronic periodontitis. Literature review
Authors: Grudyanov A.I. , Fomenko E.V. , Kalyuzhin O.V.
Published: April 2021

In the article, based on the data from literary sources, the features of the development of inflammato-ry periodontal diseases and immune reactions in periodontitis are considered. It is shown that the structure of innate human immunity is based on the cellular system for the rapid recognition of pathogenic microbes as for-eign bodies and their destruction. Effective recognition of pathogens BY toll-and NOD-receptors of innate im-munity causes the production of cytokines and chemokines, α-and β-beta-defensins, has an antimicrobial effect and attracts a large number of cells of the immune system to the focus of attack of microorganisms. It is concluded that the study of the exact mechanism of action of NOD receptors and their interaction with other image-recognizing receptors will lead to the development of more effective and subtle methods of controlling the in-flammatory response in periodontitis.
Cinquantenaire de la francophonie : le jubilé avant la traversée des siècles
Authors: Yongui Jean Paul
Published: April 2021

La matrice originelle de la Francophonie est une idée de rassemblement dont la génialité a consolidé un mouvement associatif désormais cinquantenaire. Les institutions naissent des idées et se maintiennent par la vertu de la pensée constructive. Par conséquent, le cinquantième anniversaire de la Francophonie institutionnelle signifie d’abord que la force d’une idée a triomphé jusque-là de l’usure du temps. Ce demi-siècle convie ensuite à une cure de jouvence de la Francophonie, à une modernisation de ses institutions au premier rang desquelles l’Organisation internationale de la Francophonie, dans l’optique de pérenniser l’idéal de fraternité universelle par le partage de la langue française. Loin d’être un monde parfait, l’espace francophone souffre de dysfonctionnements qui l’exposent à des critiques fondées ou outrées. Dans l’encadrement de la théorie des régulations du sociolinguiste Paul Zang Zang, le présent article diagnostique les difficultés structurelles de la Francophonie. Aucun sujet n’est tabou : la langue française, la Charte d’Antananarivo 2005, la diffusion du livre francophone, le statut des langues autochtones, la crise des mobilités, la « francophobiphonie », l’humanitaire, le déficit de communication, les obstructions à l’inventivité. Au lendemain du cinquantenaire, la Francophonie devra faire face au défi de la traversée des siècles. Par le truchement de l’approche diachronique prospective, le présent article esquisse une palette de solutions destinées, dans l’immédiat, à préserver la symbiose absolue entre la Francophonie et la totalité du XXIème siècle. Objectivement, la gouvernance de la Francophonie du troisième millénaire ne peut rester captive de la rhétorique et des méthodes des années 1970. Par conséquent, le basculement du monde dans le XXIème siècle oblige la Francophonie institutionnelle à opérer sa propre transfiguration. Le présent article préconise ainsi une présence télévisuelle plus audacieuse de la noosphère francophone sur une planète Terre où Internet et la téléphonie mobile ont exacerbé la polyphonie des idiosyncrasies et des cultures. Dans ce monde nouveau proposé par l’actuel millénaire, le destin de la langue française s’accomplit par l’infiniment petit, avec les nanotechnologies, et via l’infiniment grand exploré par les technologies astronautiques. Forts de ce constat et faisant écho à la théorie des régulations, de nombreux chercheurs invitent à intégrer les fonctions cybernétiques dans les stratégies futures de diffusion du français.
Is Francophonie a cultural common ?
Authors: Micaëlli Jean-Pierre
Published: April 2021

Les catégories économiques peuvent faire plus que qualifier un pan de la francophonie contemporaine. Elles peuvent aider à la penser. Ainsi, cet article présentera comment le cadre théorique d'Elinor Ostrom développé pour analyser les biens naturels communs (commons) présente un intérêt pour comprendre ce qu'est un commun culturel ; la francophonie en étant une forme particulière. Ce bien constitue le sujet et le collectif, repose sur une croissance continue du fonds culturel, est étendu et extensible, et se veut l'objet de communautés créatives. Certaines questions relatives à la francophonie contemporaine seront ensuite abordées à travers ce prisme. Celle-ci sera appréhendée comme un commun culturel à la fois résiliaire, résilient, et dont la gouvernance suppose un véritable cocktail institutionnel autrement plus complexe que celui mis en œuvre pour gérer les communs naturels.
De l’art de la propagande à l’art du management : Fonctions de la communication religieuse
Authors: Sylla Serigne
Published: April 2021

Avec l’émergence des médias confessionnels, l’urgence s’impose de réinterroger le rapport entre les médias et les religions. Cela pousse à analyser la communication religieuse comme référence des lignes éditoriales de ces médias. Le cadre d’étude de cet article est Lamp Fall Télévision. Nous partons de ce cas pour étudier les fonctions sociales et managériales de la communication religieuse. Ainsi, à partir d’un diagnostic de sa ligne éditoriale, il est constaté que ce médium, Lamp Fall Télévision, s’est servi de ce type de communication pour jouer son rôle de propagande en faveur de la confrérie mouride et assurer son management organisationnel.
Texte introductif. Médias et Religions en Francophonie : Un plaidoyer pour une éthique de la compréhension
Authors: Loum Ndiaga , Sarr Ibrahima , Simard Jean-François
Published: April 2021

Ce chapitre introductif fait le point sur les motivations qui sous-tendent le choix de cette thématique (rapports entre médias et religions), sur le contexte dans lequel intervient ce débat scientifique et la nature des contributions retenues dans ce numéro spécial de la revue internationale des mondes francophones. En un mot, il s’agit de faire la démonstration de la pertinence à la fois scientifique, sociale et conjoncturelle d’une problématique qui associe communication médiatique et religions. L’apport espéré à l’amélioration des connaissances dans les sciences sociales repose sur le caractère parfois inédit des résultats présentés dans les différentes contributions ici retenues.
La francophonie en Chine : perspectives linguistique et culturelle
Authors: Zhang Li
Published: April 2021

La francophonie connaît un développement rapide sur les plans linguistique et culturel en Chine depuis des années, qui se traduit par l’essor de l’enseignement du français dans les universités chinoises et des structures privées, la formation des plateformes des échanges culturels en Chine. Les dynamiques de cette prospérité proviennent de plusieurs parties : la Chine, la France, la Francophonie et aussi leur même conception de la culture. Le développement de la francophonie en Chine sera maintenu d’autant qu’il existe des potentialités de coopération culturelle entre la Chine et l’OIF en Afrique.
Les nouveaux visages africains francophones en sciences économiques
Authors: Silem Ahmed
Published: April 2021

Cet article présente, de manière comparative, la production documentaire en économie des pays africains francophones. Il montre, par l’examen de travaux de quelques économistes en activité et référencés dans les bases de données, que la science économique en Afrique n’est nullement contemplative. Si, le plus souvent la confusion n’est pas faite entre analyse d’intention scientifique et prise de position politique, il arrive aussi que les titres universitaires soient mis au service d’un agenda moins scientifique.
Quelle évaluation pour la Francophonie ? Une première critique de Francométrie
Authors: Micaëlli Jean-Pierre
Published: April 2021

L’évaluation des politiques publiques est souvent pensée comme le moyen de renforcer le contrôle du Politique sur des opérateurs mandatés pour assurer des services d’intérêt public. Quoique dominante, l’évaluation mandataire n’est pas adaptée à la Francophonie. Tel n’est pas le cas de l’évaluation communautaire. Cet article en explicite d’abord les fondements théoriques. Il propose ensuite une première critique de Francométrie, un outil d’évaluation communautaire à destination des membres de l’Organisation Internationale de la Francophonie (OIF), prototypé début 2018 par l’Institut International pour la Francophonie (2IF).
Mode de production des élites féminines dans la région du Nord-Cameroun : résistances sociétales et succès politiques
Authors: Manga Kalniga José Donadoni
Published: April 2021

Les sociétés au Nord-Cameroun sont hétérogènes et traversées par un système socio-idéologique phallocratique, patriarcal et lamidal où les rapports reposent sur la hiérarchie sociale. L’avènement du phénomène municipal se confronte à la question de l’insertion des femmes dans le métier politique local. Pour contourner ce système social résistant à leur participation politique, les femmes recourent aux stratégies individuelles assises sur les biographies parentale, familiale et matrimoniale d’une part, et d’autre part, sur le militantisme et les règles électorales. Le néo-lamidalisme, l’observation directe, la recherche documentaire et les entretiens individuels ont fourni les faits sociaux analysés.
CLEAVAGE STRUCTURE CHANGE IN THE 2019 GENERAL ELECTION IN INDONESIA
Authors: Mubarak Haris
Published: April 2021

This paper examines the following puzzle in the Indonesian electoral results: while the 2019 election showed clear cleavage voting at the presidential level, such voting was not apparent in the national legislative elections, which are held at the same time. It considers two different explanations for this divergence, split-ticket voting and the distinctions in the electoral system between the presidential election and the election for the national legislature. It concludes that the structure of the different voting systems does the best job of explaining the differences in voting patterns.
THE FACTORS THAT INFLUENCE THE CHOICE OF GROUP WORK’S SOCIAL WORK METHODS OF THERAPEUTIC COMMUNITY AND NARCOTIC ANONYMOUS MODEL IN THE SOCIAL REHABILITATION CENTER FOR DRUG ADDICTION
Authors: Ritonga Fajar Utama , Arifin Adil
Published: April 2021

This research aims to determine the factors that influence the choice of group work’s social work methods of therapeutic community (TC) and narcotics anonymous (NA) model in the social rehabilitation center for drug addiction i. The research method is a descriptive qualitative approach, the key informants are the owners of the orphanage or program managers as well as the policymakers in the social rehabilitation center for drug addiction. The main informants are social workers and counselors and staff in the social rehabilitation center. The data collection technique uses in-depth interviews and focuses on group discussions. The data analysis technique uses component analysis. Research locations is in Medan Community Partners Foundation (YAMIMAS Medan), Caritas Shelter House PSE in Medan City, Loka BNN (National Narcotic Agency) in Kabupaten Deliserdang, Permadi PutraSocial Institution ‘INSYAF’ in Kabupaten Deliserdang, Nazar Foundation in Medan. The research results are; the internal factors: for the private institution's influence by the self-desire or by joint decisions are based on careful consideration of the managers or administrators of social rehabilitation institution. For the government-owned orphanages, the choice of therapeutic community model decides by the ministry of social affairs and the national narcotics agency. The external factors: for the private institution's influence by the pieces of information from national and international seminars, or experiences in dealing with drug clients/resident, social workers, and counselors who are struggling to use therapeutic community and narcotic anonymous group work model and sharing of experiences from administrators or manager of other social rehabilitation institution. Meanwhile, institutions under the ownership of the government are not influenced by external factors because they only carry out an order from the ministry of social affairs or national narcotics agency.
Lactobacillus buchneri’nin silajdaki eşsiz etkinliği
Authors: ÖNOL Mustafa , DURU ÖNOL İmge
Published: April 2021

Silajın daha iyi korunmasını sağlamak ve geliştirmek için çeşitli katkı maddeleri mevcuttur. Bu silaj katkıları içinde en yaygın kullanıma sahip olanlardan biri de laktik asit bakterilerini içeren mikrobiyal inokulantlardır. Havaya maruz kaldıktan sonra birkaç gün boyunca şaşırtıcı şekilde sıcaklığı artmayan (aerobik kararlılık gösteren) mısır silajlarından izole edilen Lactobacillus buchneri bakterilerinin inokulant olarak silajlarda kullanımına ilişkin çalışmalar bu alanda son 20 yılda en ilgi çeken konulardan biri olmuştur. Günümüzde L. buchneri, silaj inokulantlarında kullanılan ana heterofermantatif laktik bakteridir. Bu bakteri laktik asidi asetik aside ve diğer ürünlere dönüştürebilir. Asetik asit, silajların ısınmasına ve bozulmasına neden olan mayaların ve küflerin iyi bir inhibitörüdür. Böylece L. buchneri silajın aerobik stabilitesini, başka bir deyişle silo ve yemlik ömrünü artırır. Bu derlemede, L. buchneri’nin silaj açısından öne çıkan temel özellikleri, silajın korunmasında sağladığı olumlu etkiyi oluşturma şekli ve silajda inokulant olarak kullanımında etkinliğini etkileyen etmenler hakkında bilgi vermektedir.
Metas de inflación como instrumento de política monetaria
Authors: Mateos Hanel Calixto , Schwartz Rosenthal Moisés
Published: April 2021

En fechas recientes un número creciente de países ha establecido metas inflacionarias como instrumento de política monetaria. En este documento se analiza la experiencia con metas inflacionarias de algunos de estos países y se derivan lecciones sobre los principales elementos que deben considerarse para la adecuada instrumentación de este esquema. Asimismo, se hace un repaso del marco conceptual necesario para el diseño de la política monetaria. En particular, se hace la distinción entre metas y objetivos intermedios y se analizan sus principales características. El establecimiento de metas inflacionarias se presenta como una alternativa para la consolidación de la credibilidad en las políticas del banco central y de su objetivo de abatir el ritmo inflacionario.
La relevancia macroeconómica de los bienes raíces en México
Authors: Guerra de Luna Alfonso H.
Published: April 2021

La evidencia empírica demuestra que el mercado de bienes raíces tiene un comportamiento cíclico. Cambios en los precios de estos activos pueden tener repercusiones para la economía en su conjunto siendo el sistema financiero uno de los canales de mayor importancia. La literatura que analiza el problema del crédito hipotecario señala que el factor determinante de la decisión de moratoria es el valor de la vivienda neto del monto de la hipoteca, o sea el capital neto en vivienda. El presente trabajo sustenta esta hipótesis para el caso de México al analizar la relación entre la razón de crédito a valor de la vivienda (variable representativa del capital neto en vivienda) y la cartera hipotecaria vencida. Es probable que gran parte de la expansión crediticia en México se dio cuando la probabilidad de suspensión de pagos era relativamente alta y que el problema hipotecario se gestó con antelación a la crisis de 1994.
Efecto de los precios administrados sobre la inflación
Authors: Gamboa Rafael
Published: April 2021

A lo largo de los años, el Sector Público (SP) en México ha participado directamente en la determinación del precio de un gran número de bienes. La forma en que el SP ha ajustado los precios de los bienes administrados (PA) ha tenido cierto impacto sobre el nivel de inflación. Se han seguido tres estrategias distintas para ajustar los PA. Hasta 1987, el SP controlaba los aumentos en 163 artículos, equivalentes al 36% del gasto. Como complemento al programa de estabilización de 1987, se fijaron temporalmente los PA, utilizándolos como ancla nominal de la economía. Los constantes rezagos en los PA, que se fueron presentando hasta 1991, crearon fuertes variaciones en precios relativos, lo que contribuyó a que se registraran aumentos abruptos en el nivel de precios. A partir de 1992 se procedió a dejarle al mercado la determinación del precio de los bienes producidos por el sector privado, con lo que la proporción del gasto en bienes con PA bajó al 16%. Por lo que concierne a los bienes producidos por el SP, a partir de 1992 se anuncian las tasas a las que aumentan mensualmente algunos de éstos, por lo general reflejando la inflación objetivo de las autoridades. Las políticas de liberalización y de ajuste mensual de precios disminuyeron la variabilidad de precios, pero incrementaron el impacto de los aumentos en PA sobre la inflación. Los anuncios de aumentos en los precios administrados tienen hoy un efecto más importante sobre los precios de los bienes libres que en el pasado, al afectar los PA las expectativas de inflación. El efecto de los precios administrados sobre las expectativas de inflación sugiere que resulta factible que el Banco de México utilice metas de inflación para anclar las expectativas inflacionarias de los agentes económicos.
Relationship On Education Level and Environmental Attitude With Tourist Behavior in Kebun Teh Kabawetan
Authors: Fridayati Herlina
Published: April 2021

The purpose of this study was to determine the relationship between the level of education and the attitude of concern for the environment with the behavior of tourists in maintaining environmental cleanliness in the area of ​​the Kabawetan Tea Plantation tourism object, Kepahiang Regency, Bengkulu Province. Research that has been carried out using a quantitative approach, with descriptive methods. Based on data on average annual visits, the total population visited was 138 people. The sample of this research is random visitors who meet researchers who are willing to fill out a complete questionnaire. Behavior that can be observed as many as 53 people. Based on the results of the study, it shows that the relationship between knowledge about environmental protection and the behavior of maintaining environmental hygiene is very close, with a product torque correlation value of 0.787. This proves that the proposed hypothesis is accepted. Therefore, the authors draw the following conclusions: 1) There is a positive relationship between the level of education in maintaining environmental hygiene and behavior; 2) There is a positive relationship between environmental care and environmental protection behavior. environmental Hygiene; There is a positive correlation between attentiveness and hygiene behavior.
The Effect Of Organizational Culture And Procedural Justice On Organizational Citizenship Behavior
Authors: Fathuroni Khulil
Published: April 2021

This study aims to show the influence of Organizational Culture and Procedural Justice on Organizational Citizenship Behavior (Study on IT Companies In Special Region of Yogyakarta) which is focused on the high low organizational culture of a company. Samples in this study as many as 9 IT companies with convenience sampling method. The population in this study is all IT companies in Isitimewa Area of Yogyakarta. The data type in this study is primary data. The data source in this study is the results of surveys, interviews and filling out questionnaires from employees of IT companies in the Special Region of Yogyakarta who became research samples. The results of this study show that organizational culture and procedural justice have a significant effect on organizational citizenship behavior in IT companies in Dareah Istimewa Yogyakarta. But for companies whose organizational culture is low organizational culture has no effect on organizational citizenship behavior in IT companies in the Special Region of Yogyakarta.
Stiffness of a multilayer piezo-actuator of nano- and microdisplacements
Authors: Afonin S.M.
Published: April 2021

The stiffness and elastic flexibility of a multilayer piezoactuator for nano- and micro-displacements were studied. Its mechanical and control characteristics are constructed and its stiffness and elastic flexibility are determined taking into account the type of control.
Keywords: multilayer piezo-actuator, stiffness, deformation, elastic flexibility, nano- and microdisplacement.
eduems@mail.ru
Classification of schemes of volumetric hydraulic machines according to the types of plain kinematic chains limiting their working chambers
Authors: Volkov G.Y. , Smirnov V.V.
Published: April 2021

A classification of volumetric hydraulic machines is proposed, which is based on the structure of a plain kinematic chain that closes the working chamber. The class of the hydraulic machine determines the number of bodies included in this chain; the series determines composition of the kinematic pairs of this chain. The classification covers all volumetric hydraulic machines used in modern technology.
Keywords: volumetric hydraulic machine, classification, working chamber, kinematic chain, mechanism structure.
vlkv48@mail.ru
Multifractal analysis and magnetic properties of the "25Х15КА" additive hard magnetic alloy
Authors: Jukov A.S. , Kamyinin A.V. , Gavrikov I.S. , Barahtin B.K. , Kuznetsov P.A.
Published: April 2021

The preparation of a hard magnetic alloy of the Fe—Cr—Co system by the additive method of selective laser melting of a metal powder obtained by melt atomization is considered. The structures and magnetic parameters of the additive samples are investigated. An increase in the magnetic characteristics of these samples in comparison with cast samples is established.
Keywords: selective laser melting, metal powder, structure, multifractal analysis, magnetic properties.
npk3@crism.ru
Application of intelligent systems to optimize the production of science intensive products
Authors: Chursin A.A.
Published: April 2021

The construction of an intelligent control system for the production of science intensive products is considered. An economic and mathematical model of the functioning of the system at all stages of the life cycle of science intensive products is proposed, the informational principle of making economic decisions under conditions of uncertainty is formulated.

Keywords: science intensive products, high-tech production, intelligent system.
achursin2008@yandex.ru
GOVERNANSI PUBLIK DALAM PENGELOLAAN BADAN USAHA MILIK DESA DI KABUPATEN BANYUMAS
Authors: Wijaya Shadu Satwika , Sutikno Chamid
Published: April 2021

Pengembangan potensi lokal menjadi aspek penting untuk meningkatkan daya saing lokal.Oleh karena itu, pembentukan Badan Usaha Milik Desa (BUMDes) merupakan salah satu modelpemanfaatan kapasitas finansial desa untuk pemanfaatan potensi dan kebutuhan desa. Namun,dalam perjalananya penerapan BUMDes masih menemukan permasalahan dalam mencapai tujuanpemanfaatan potensi dan kebutuhan desa. Tujuan penelitian ini adalah menemukan pendekatanyang tepat dalam mendukung upaya peningkatkan kinerja BUMDes dalam mengelola potensi desa.Hasil penelitian menunjukkan bahwa pengelolaan BUMDes belum didasarkan pada analisiskebutuhan dan pemetaan potensi desa setempat. Pengelolaan BUMDes perlu diarahkan menujuoptimalisasi peran stakeholders melalui pendekatan governance.
ANALISIS FLUKTUASI DAN ELASTISITAS TRANSMISI HARGA KENTANG DI KABUPATEN MAGELANG
Authors: Ayomi Nun Maulida Suci , Setiawan Bambang M. , Roessali Wiludjeng
Published: April 2021

Selisih harga atau perbedaan harga yang diterima oleh petani dengan harga yang harus dibayarkan oleh konsumen, menunjukkan bahwa harga yang dibayarkan oleh konsumen bukanlah harga yang diterima oleh petani. Penelitian ini bertujuan untuk menganalisis fluktuasi harga dan elastisitas transmisi harga kentang di Kabupaten Magelang. Penelitian menggunakan data sekunder selama 156 minggu dari tahun 2016 – 2018. Analisis yang digunakan untuk mengetahui fluktuasi harga dengan koefisien keragaman, dan untuk mengetahui elastisitas transmisi harga adalah regesi liner sederhana. Hasil penelitian menunjukkan bahwa nilai koefisien keragaman sebesar 15,70% sehingga fluktuasi harga kentang ditingkat pedagang pengecer cukup tinggi, dan nilai elastisitas transmisi harga kentang di Kabupaten Magelang inelastic (<1), sehingga laju perubahan ditingkat petani lebih kecil dibanding dengan perubahan harga ditingkat pedagang. Penurunan produksi membuat dampak dari adanya harga kentang yang tidak pasti dari musim ke musim. Rantai pemasaran yang panjang mempengaruhi elastisitas transmisi harga. Petani yang bertindak sebagai penerima harga, hanya dapat menerima harga yang sudah diberikan oleh pedagang pengumpul desa.
Tzitzeica equations and Tzitzeica surfaces in separable coordinate systems and the Ricci flow tensor field
Authors:   DEPARTMENT OF MATHEMATICS OVIDIUS UNIVERSITY OF CONSTANTA 900527 CONSTANTA, ROMANIA E-mail address: boskoff@univ-ovidius.ro, BOSKOFF WLADIMIR G. , CRASMAREANU MIRCEA ,   FACULTY OF MATHEMATICS UNIVERSITY AL. I. CUZA 700506 IASI, ROMANIA E-mail address: mcrasm@uaic.ro, PISCORAN LAURIAN-IOAN ,   NORTH UNIVERSITY CENTER OF BAIA MARE TECHNICAL UNIVERSITY OF CLUJ NAPOCA DEPARTMENT OF MATHEMATICS AND COMPUTER SCIENCE VICTORIEI 76, 430122 BAIA MARE, ROMANIA E-mail address: plaurian@yahoo.com
Published: April 2021

The Tzitzeica equation and two well-known Tzitzeica surfaces are studied in the separable coordinate systems on the plane and space respectively. We study also Tzitzeica graphs with a parameter and interpret the induced class of first fundamental forms as a Riemannian flow. Consequently, we introduce a tensor field which measures how far is a given Riemannian flow to be a Ricci one. This tensor field is explicitly computed for the case of a initial isothermic metric and a flow of convex type.
A descent global optimization method based on smoothing techniques via Bezier curves
Authors:   DEPARTMENT OF MATHEMATICS SULEYMAN DEMIREL UNIVERSITY ISPARTA, TURKEY E-mail address: ahmetnur32@gmail.com, ahmetsahiner@sdu.edu.tr, SAHINER AHMET , YILMAZ NURULLAH ,   DEPARTMENT OF MATHEMATICS SULEYMAN DEMIREL UNIVERSITY ISPARTA, TURKEY, KAPUSUZ GULDEN ,   DEPARTMENT OF MATHEMATICS SULEYMAN DEMIREL UNIVERSITY ISPARTA, TURKEY
Published: April 2021

In this study, we introduce a new global optimization method, named Esthetic Delving Method, based on the auxiliary function approach. First, we design the method theoretically and then present its implementable version. Finally, we apply the algorithm to the test problems in order to demonstrate its efficiency.
Approximating fixed points of asymptotically demicontractive mappings by iterative schemes defined as admissible perturbations
Authors:   TECHNICAL UNIVERSITY OF CLUJ-NAPOCA DEPARTMENT OF MATHEMATICS AND COMPUTER SCIENCE FACULTY OF SCIENCES NORTH UNIVERSITY CENTER AT BAIA MARE VICTORIEI NR. 76, 430122 BAIA MARE, ROMANIA E-mail address: cristina.ticala.pop@gmail.com, TICALA CRISTINA
Published: April 2021

We establish convergence theorems for a Krasnoselskij type fixed point iterative method constructed as the admissible perturbation of an asymptotically demicontractive operator defined on a convex closed subset of a Hilbert space.
Sinergitas Antar Perguruan Tinggi Dalam Pelaksanaan Workshop Penulisan Jurnal Nasional Dan Internasional Secara Daring
Authors: Hamid Nasrullah  , Ari Waluyo  , K Prihartono Aksan Halim  , Wenny Marlini  , Uswatun Khasanah  , Wakhid Yuliyanto
Published: April 2021

Sinergitas antar perguruan tinggi menjadi sebuah titik solusi bersama dalam mendorong para akademisi dalam mempublikasikan hasil riset para dosen/peneliti. Hal tersebut dapat terealisasi dengan saling berkomunikasi antar perguruan tinggi dengan mengadakan sebuah kegiatan. Kegiatan tersebut adalah pelaksanaan Workshop Nasional dengan Tema  tips & trik tembus jurnal terakreditasi sinta dan workshop penulisan jurnal internasional bereputasi. Metode pelaksanaan kegiatan melalui aplikasi zoom meting sehingga dapat dijangkau dari berbagai daerah mulai dari sabang sampai merauke. Hasil polling zoom dari jumlah total 122 peserta yang mengisi dengan satu item pertanyaan tentang kepuasan peserta terhadap penyelenggaraan kegiatan menunjukkan jawaban peserta yang mengisi pada item sangat puas porsentasenya 62% dengan jumlah responden 76, selanjutnya pada item puas porsentasenya 37% dengan jumlah responden yang menjawab 45, selanjutnya item kurang puas porsentasenya 1% dijawab 1 responden dan tidak puas porsentase yang menjawab 0% responden. Dampak dari kegiatan tersebut adalah setiap lembaga di perguruan tinggi dapat memberika workshop pelatihan jurnal dilingkungan perguruan tinggi masing-masing 0.
SISTEM KEAMANAN SEPEDA MOTOR DENGAN MENGGANTI SAKLAR STARTER MENGGUNAKAN FINGERPRINT
Authors: Raju Rizkyana  , Awang Surya
Published: April 2021

Semakin banyaknya jumlah kendaraan bermotor juga membuat kejahatan terhadap pengguna sepeda motor meningkat. Beberapa data resmi menunjukkan bahwa pencurian sepeda motor semakin meningkat dari tahun ke tahun. Apalagi di masa pandemic sekarang ini, kejahatan semakin meningkat seiring dengan keadaan ekonomi yang semakin sulit. Sementara itu sistem keamanan sepeda motor yang ada selama ini sudah sangat dikenali oleh para pelaku pencurian sepeda motor, sehingga sangat mudah dibobol. Pengamanan dengan menggunakan gembok juga tidak terlalu menjamin, karena masih dengan mudah dirusak dengan cairan. Untuk itu perlu dirancang alat pengaman yang lebih bagus. Tujuan penelitian ini adalah merancang sistem keamanan sepeda motor dengan menggunakan sidik jari. Metode yang dipergunakan adalah identifikasi kebutuhan, perancangan perangkat keras dan perangkat lunak, penyesuaian alat, dan pengujian alat. Hasil yang didapat dari penelitian ini adalah alat keamanan yang dirancang sudah dapat berfungsi dengan baik. Mesin sepeda motor akan menyala jika dinyalakan dengan sidik jari yang terdaftar. Mesin sepeda motor tidak akan menyala jika sidik jari yang digunakan tidak dikenal dan pada kondisi itu alarm akan menyala
Internal Marketing in Its Influence on Organizational Commitment: the Mediation of Job Satisfaction and Organizational Justice
Authors: Chasanah Uswatun , Suyanto M. , Istanto Yuni
Published: April 2021

This research aims to examine organizational commitment model of private university lecturers in Indonesia, using three independent variables, namely internal marketing, job satisfaction and organizational justice. Data collection was done by survey method on 200 private university (PTS) lecturers under the Higher Education Service Institutions covering 14 regions in Indonesia. Helped by PLS (Partial Least Square), SEM (Structural Equation Model) was used to process the data collected. Accordingly, to check the validity, the measurement model was evaluated based on several reflective indicators (convergent and discriminant validity as well as composite reliability). Based on the result of discriminant and convergent validity, it is known that the whole constructs are valid as both the outer loading and AVE (Average Variance Extracted) value are > 0.70, moreover, a similar good result shown in composite reliability evaluation with the value of > 0.70. Finally, the results found showed that seven hypotheses, out of nine hypotheses, were proven to be true. On the other hand, for the other hypotheses, the findings showed that organizational justice and Internal marketing had no direct effect on organizational commitment. Next, it is also known that organizational justice and job satisfaction were proven to be the mediators of in the relation between internal marketing and organizational commitment.
A global disinfectant standard for cleanrooms: Presenting a harmonised approach
Authors: Sandle Tim
Published: April 2021

Disinfectant efficacy testing is an essential part of a facility contamination control strategy. Pharmaceutical and healthcare products facilities must know that the products they are using can achieve effective levels of microbial kill across a range of surface types.

The problem faced by microbiologists and production managers is that the various national and international standards use different methodologies. In addition, these standards and methods have not been written specifically for cleanrooms and the microbial test panels and logarithmic reduction expectations are not considered suitable.

In order to develop an international standard suitable for all pharmaceutical facility cleanrooms, Ecolab has developed the Validex™ method, which is independently assessed in this paper. This method involves using 2 cm diameter disks, to target a 3 log reduction for vegetative bacteria in 5 minutes; and a 2 log reduction for fungi and bacterial spores in 10 minutes. The key criteria and rationale for selection, along with the methodology, are presented in this paper.
Ermüdungs- und Tragfähigkeitsuntersuchungen an lärmabsorbierenden Stahlbetonfertigteilelementen für Hochgeschwindigkeitsstrecken der Bahn/Fatigue and resistance of precast reinforced concrete panels as noise protection for high speed railroad traffic
Authors: Maurer Reinhard , Heeke Guido , Grochtmann Christian
Published: April 2021

Schallschutzwände unterliegen an Hochgeschwindigkeitsstrecken der Eisenbahn starken Druck- / Sogbeanspruchungen. Durch die wirtschaftlich optimierte Bauweise dieser Wände wird deren Tragschale in der Regel nur mit einer einlagigen, mittigen Bewehrung ausgeführt. Das führt dazu, dass sowohl das Bauteil als auch die Baustoffe einer erheblichen, ermüdungswirksamen Wechselbeanspruchung unterliegen.

 

Im Rahmen eines Zulassungsverfahrens wurden in den vergangenen Jahren zahlreiche experimentelle Untersuchungen an der Technischen Universität Dortmund durchgeführt. Diese Versuchsreihen umfassten Großversuche an 4,96 m und 7,46 m langen Wandelementen im Maßstab 1 : 1 sowie Bauteilversuche um das Trag- und Ermüdungsverhalten eingehend zu untersuchen. Ebenso wurde das Verbundverhalten zwischen Absorptionsschicht und Tragschale im Dauerschwingversuch sowie in Abscherversuchen genauer betrachtet, da die schubfeste Verbindung zwischen Trag- und Absorptionsschicht ohne zusätzliche Bewehrung in der Verbundfuge erfolgt.
Bemessung von Nagelplatten nach EC 5/Design of Nailplates according EC 5
Authors: Hartmann Heiner
Published: April 2021

Im Gegensatz zu DIN 1052:2008 erfolgt die Bemessung von Nagelplatten als Verbindungsmittel bei Fachwerkstrukturen auf einem plastischen Bemessungskonzept sowohl für die Anschlussflächen als auch für die Fugennachweise. Für den Nachweis der Anschlussflächen wird ein vereinfachter Ansatz zur Berechnung eines plastischen Widerstandsmomentes vorgestellt, welcher auf der sicheren Seite liegt und auch ohne aufwendige Programmunterstützung berechnet werden kann. Für den Fugennachweis werden die Möglichkeiten zur plastischen Bemessung der Fuge zwischen einzelnen Anschlussflächen dargestellt.