bluuebunny/crossref_metadata_2025 huggingface dataset:
An Analysis of the Compliance of the Structures of Relations of Objects of Classes on the Varieties of their Descriptions
Authors:   National University of Uzbekistan, Tashkent, Ignat'ev N. A. , Lolaev M. Y. ,   National University of Uzbekistan, Tashkent
Published: January 2021

The synthesis of latent features is considered in order to reduce the size of the space for describing objects of disjoint classes K1, K2. A condition is proposed for the sequential formation of feature sets X(h) I X(n), 2 ? h ? n for linear display of object descriptions from X(h) to R2. Latent features are synthesized from data obtained as a result of preprocessing the values of the initial features. Preprocessing is realized through normalization in [0,1] and data transformation that is invariant to the scales of feature measurements. The correspondence structures of objects in X(h) and R2 are investigated according to the results of data preprocessing and grouping. A measure of compliance of two structures of relations of objects in different features spaces is proposed. The measure of compliance is calculated by splitting the objects of classes into disjoint groups. When splitting into groups, the relation of connectedness of class objects by a defined set of hyper balls is used.
On the question of the language behavior of Kyivans in sociolinguistic dimensions
Authors: Makarets Iuliya
Published: January 2021

The article presents the results of a survey conducted within the project under the grant of the President of Ukraine F82 "Linguo-sociological monitoring of the dynamics of the structure and status of the Ukrainian language in modern times" (2019). The study involved 400 Kyivans 18 to 65 years old. The main goal was to supplement the sociolinguistic studies of the language situation of Ukraine of recent years with new data, but not to duplicate them. Till now, researchers focus on the language of everyday communication of respondents, on the native language of their parents, on the language of communication in the family, with friends and in professional life. Therefore, 10 questions were selected for the questionnaire, which should reveal the status perception of language and language guidelines of the respondents. The obtained data show, that the native language self-determination of Kyivans not always determines their language behavior. 73.25% of respondents called Ukrainian their native language, but the informational and cultural space in which they live remains mostly bilingual or Russian-language. 79.75% of respondents said, that the state should support functioning of the Ukrainian language, which should indicate a fairly high value attitude to the language. However, 32% consider the measures, that were taken by the state to ensure the functioning of the Ukrainian language, for example, in media, which so far were predominantly Russian- language, needless and 22% say, that the quota did not affect the situation in any way. More than 32% of Ukrainians six months after the adoption of the new version of the spelling standard did not acquaint with it or even did not hear about it at all, which indicates indifference to language development. There is significant percentage of those, who do not see value in the national language and are not aware of the need for public language policy aimed at supporting it. This indicates an insufficient level of language consciousness of Ukrainians. Reflections on the Ukrainian language are mostly caused by the fact, that it is a frequent subject of political debate, rather than by awareness of its essence as a cultural and nation-building factor. Therefore, there is an urgent need to shift the emphasis in its perception from its purely political role to cultural and value essence.
The II International Civil Congress on Comparative Studies: Review
Authors: Morgunova E. A.
Published: January 2021

The review covers The II International Civil Congress on Comparative Studies (Mozolinskie Readings) "The Role of Man in Civil Law", dedicated to the 90th anniversary of Kutafin Moscow State Law University (MSLA) held online on December 4-5, 2020. The Congress was organized by the Department of Civil Law of Kutafin Moscow State Law University (MSAL), the Scientific and Educational Center of Private Law of Kutafin Moscow State Law University (MSAL), the Statute Publishing house, the Russian Arbitration Center at the Russian Institute of Modern Arbitration, the Institute of International Relations and Socio-Political Sciences of Maurice Thorez Moscow State Linguistic University (The Maurice Thorez Institute of Foreign Languages). The Congress was organized with the participation of the Department of Civil and Administrative Proceedings and the Department of History of State and Law of Kutafin Moscow State Law University (MSLA).The Congress was attended by Russian and foreign scientists from Austria, Armenia, the Republic of Belarus, Italy, China, Latvia, Poland and the United States, as well as a representative of the world intellectual property organization. The total number of participants of the Congress was more than 600 people.On the first day of the Congress, a plenary session and a panel discussion "The Role of an and the Role of IT in Judicial Protection" were held. On the second day, master classes for young scientists, a platform for presentations by young post-graduate scientists and creative workshops for students were organized with moderation by leading scientists on the topic of the creative workshop. The sponsor of the creative workshops was the "ConsultantPlus" company.
Skrining Senyawa Bioaktif Daun Perepat (Sonneratia alba J.E. Smith) sebagai Antioksidan asal Pesisir Kuala Bubon Aceh Barat
Authors: Gazali Mohamad , Nurjanah  , Ukhty Nabila , Nurdin Muhammad , Zuriat
Published: January 2021

Tumbuhan perepat (Sonneratia alba) merupakan salah satu spesies mangrove yang memilki potensi sebagai sumber antioksidan yang dimanfaatkan oleh masyarakat pesisir Kuala Bubon. Tujuan penelitian adalah untuk menentukan potensi senyawa bioaktif pada daun perepat (S. alba) asal pesisir Kuala Bubon sebagai antioksidan. Metode ekstraksi menggunakan tiga pelarut (methanol, etil asetat dan n-heksana) melalui maserasi tunggal. Berdasarkan hasil penelitian menunjukkan bahwa kandungan daun S. alba meliputi fenolik, saponin, tannin dan steroid. Hasil uji antioksidan dengan menggunakan metode DPPH menunjukkan bahwa ekstrak methanol memiliki aktivitas antioksidan yang paling kuat dengan nilai IC50 sebesar 26,68±2,2 mg/L sedangkan ekstrak etil asetat sebesar 33,37±3,4 mg/L dan ekstrak n-heksana memiliki aktivitas antioksidan yang paling lemah dengan nilai IC50 sebesar 35,37±2,5 mg/L. Hal ini menunjukkan bahwa daun perepat (S. alba) memiliki prospek menjanjikan dalam penemuan antioksidan alami.
The Imbricated Foreshock and Aftershock Activities of the Balsorano (Italy) Mw 4.4 Normal Fault Earthquake and Implications for Earthquake Initiation
Authors: Sánchez-Reyes Hugo , Essing David , Beaucé Eric , Poli Piero
Published: January 2021

Foreshocks in the form of microseismicity are among the most powerful tools to study the physical processes that occur before main earthquakes. However, their detection and precise characterization is still sparse, especially for small-to-moderate-size earthquakes (Mw<6). We present here a detailed foreshock analysis for the 7 November 2019, Balsorano, Italy, normal fault earthquake (Mw 4.4). To improve the detection of the microseismicity before and after the mainshock, we use six three-component broadband receivers at distances of less than 75 km from the targeted seismicity, through template matching. To improve the understanding of the physical mechanism(s) behind the earthquake initiation process, as well as other accompanying phenomena, we also detail the spatiotemporal evolution of the sequence associated with this medium-sized earthquake, using waveform clustering and hypocenter relocation. Clear differences between foreshocks and aftershocks are revealed by this analysis. Moreover, five distinct spatiotemporal patterns associated with the different seismic activities are revealed. The observed spatiotemporal behavior shown by the foreshocks highlights a complex initiation process, which apparently starts on an adjacent unmapped antithetic fault. Finally, the aftershock activity comprises four different clusters with distinct spatiotemporal patterns, which suggests that the different clusters in this sequence have distinct triggering mechanisms.
Toward Robust and Routine Determination of Mw for Small Earthquakes: Application to the 2020 Mw 5.7 Magna, Utah, Seismic Sequence
Authors: Holt James , Whidden Katherine M. , Koper Keith D. , Pankow Kristine L. , Mayeda Kevin , Pechmann James C. , Edwards Benjamin , Gök Rengin , Walter William R.
Published: January 2021

To better characterize seismic hazard, particularly, for induced seismicity, there is an increasing interest in methods to estimate moment magnitude (Mw) for small earthquakes. Mw is generally preferred over other magnitude types, but, it is difficult to estimate Mw for earthquakes with local magnitude (ML) <3–3.5, using conventional moment tensor (MT) inversion. The 2020 Mww 5.7 Magna, Utah, seismic sequence provides an opportunity to illustrate and evaluate the value of spectral methods for this purpose. Starting with a high-quality seismic catalog of 2103 earthquakes (ML<5.6), we estimate Mw using two independent spectral methods—one based on direct waves, yielding Mw,direct, and the other based on coda waves, yielding Mw,coda. For the direct-wave method, we present a non-parametric (NP) inversion scheme that solves for apparent geometrical spreading, G(R), and site effects (S), similar to other NP procedures that have been used to calibrate regional ML scales. The NP inversion is constrained using Mws derived from MTs for nine events in the Magna sequence. We recover statistically robust and physically reasonable G(R) and S and compute Mw,direct for 635 Magna earthquakes down to ML 0.7. For the coda-wave method, we consider two separate calibration schemes involving previous MT solutions and compute Mw,coda for 311 earthquakes down to ML 1.0. For 280 of the events that were processed with both methods—Mw,direct and Mw,coda—are strongly correlated (r = 0.98), with a mean difference of only 0.05. We compare Mw,direct and Mw,coda with ML and find reasonably good agreement for ML<3.6 with the theoretically predicted relationship of Mw=(2/3)ML+C, in which C is a regional constant. Our results imply that seismic network operators can use spectral-based Mw estimates to replace ML estimates for events with ML≥1.0, and possibly smaller. The main requirement is the existence of a small number of MT solutions for calibration purposes.
Which Earthquake Accounts Matter?
Authors: Hough Susan E. , Martin Stacey S.
Published: January 2021

Earthquake observations contributed by human observers provide an invaluable source of information to investigate both historical and modern earthquakes. Commonly, the observers whose eyewitness accounts are available to scientists are a self-selected minority of those who experience a given earthquake. As such these may not be representative of the overall population that experienced shaking from the event. Eyewitness accounts can contribute to modern science only if they are recorded in the first place and archived in an accessible repository. In this study, we explore the extent to which geopolitics and socioeconomic disparities can limit the number of earthquake observers whose observations can contribute to science. We first revisit a late nineteenth-century earthquake in the central United States in 1882 that provides an illustrative example of an event that has been poorly characterized due to a reliance on English-language archival materials. For modern earthquakes, we analyze data collected for recent earthquakes in California and India via the online “Did You Feel It?” (DYFI) system. In California, online data-collection systems appear to be effective in gathering eyewitness accounts from a broad range of socioeconomic groups. In India, however, responses to the DYFI system reveal a strong bias toward responses from urban areas as opposed to rural settlements, as well a bias with literacy rate. The dissimilarity of our results from modern earthquakes in the United States and India provides a caution that, in some parts of the world, contributed felt reports can still potentially provide an unrepresentative view of earthquake effects, especially if online data collection systems are not designed to be broadly accessible. This limitation can in turn potentially shape our understanding of an earthquake’s impact and the characterization of seismic hazard.
Observational analysis of the variability of actions in judo: the key for success?
Authors: Agostinho Marcus Fábio , Franchini Emerson
Published: January 2021

The main objective of the present study was to determine whether variation in gripping action, actions before attacking, throwing techniques, direction of attack, transition from standing to groundwork combat, and groundwork techniques varied between male and female judo athletes and between gold, silver and bronze medalists in judo World Championships for cadet, junior and senior athletes. Therefore, 296 athletes who won medals in these competitions between 2018 and 2019, who executed a total of 1202 scoring actions in standing position and 300 scoring actions in the groundwork combat were analyzed. Higher variation was observed for gold medal winners for grip, actions before attack compared to bronze medalists, whereas transition variation was greater for gold medal winners compared to the other medalists. However, no differences were found between age groups, except when interacting with sex, as a lower technique variation was observed in female cadets compared to all other male age groups. Additionally, less variation was observed in females compared to males for grip, actions before attacking, number of techniques and direction of attacks. Therefore, variation in some elements can properly discriminate the podium position, females present less variation than males, but no relevant differences were found between age groups.
Intelligent CW Selection Mechanism Based on Q-Learning (MISQ)
Authors: Zerguine Nadia , Mostefai Mohammed , Aliouat Zibouda , Slimani Yacine
Published: January 2021

Mobile ad hoc networks (MANETs) consist of self-configured mobile wireless nodes capable of communicating with each other without any fixed infrastructure or centralized administration using the medium radio. Wireless technology is based on standard IEEE.802.11. The IEEE 802.11 Distributed Coordination Function (DCF) MAC layer uses the Binary Exponential Backoff (BEB) algorithm to deal with wireless network collisions. BEB is considered effective in reducing the probability of collisions but at the expense of numerous network performance measures, such as throughput and packets delivery ratio, mainly in high traffic load. Deep Reinforcement Learning (DRL) is a DL technique in which an agent can achieve a goal by interacting with the environment. In this paper, using one of the DRL models, we propose Q-learning (QL) to optimize MAC protocols' performance based on the contention window (CW) in MANETs. The intelligent proposed MISQ takes into account the number of packets to be transmitted and the collisions committed by each station to select the appropriate contention window. The performance of the proposed mechanism is evaluated by using in-depth simulations. The outputs indicate that the intelligent proposal mechanism learns various MANETS environments and optimizes performance over standard MAC protocol. The performance of MISQ is evaluated in various networks with throughput, channel access delay, and packets delivery rate as performance measures.
An Automated Framework for Patient Identification and Verification Using Deep Learning
Authors: Tommandru Suresh , Sandanam Domnic
Published: January 2021

Automated patient identification and verification are very important at a medical emergency and when patients are not carrying his/her identity. It is a risk factor that identifying the correct patient identity for doctors to provide medical treatment. The majority of the identification or verification is being done by wristbands, RFID tags, fingerprint, face detection by using handcraft feature-based face recognition systems. A new framework based on robust deep learning model and contrast enhancement is proposed in this paper. In the proposed work, the light illumination problem has been addressed by the contrast enhancement technique for deep learning models to recognize the face. It is proved that the inclusion of contrast enhancement is improving patient identification and verification. To evaluate the deep learning framework, the proposed deep learning models have been trained on our own dataset and have been tested with a real-time medical providing agency. The experimental results show that the proposed framework exhibits more robust test results with accuracy than existing hand-crafted techniques under the live webcam video capture for the real-time patient detection system.
Technological Solutions to Environmental Problems in the Development of Quarries of Copper-Zinc Ore Deposits in the South Urals
Authors: Zenkov I.V. , Loginova E.V. , Gilts N.E. , Sycheva E.M. , Kondrashov P.M. , Konov V.N. , Pavlova P.L. , Brezhnev R.V. , Skornyakova S.N.
Published: January 2021

The results of the study of the ecological state of disturbed lands in the course of opencast mining of copper-zinc ore deposits in the territory of two regions of the South Urals are presented. The necessity of reclamation of waste dumps has been substantiated. Technological and organizational regulations have been developed, the implementation of which will contribute to an increase in the efficiency of work to restore the eco-balance on the waste dumps of mining enterprises.
Applications of Small Molecules in Muscle Tissue Engineering
Authors: Mirza Ahmadi Behnaz , Talkhabi Mahmood , Rajabi Sarah
Published: January 2021

Introduction: Skeletal muscles account for about 40% of the total body weight. Every year, hundreds of people lose at least part of their muscle tissue due to illness, war, and accidents. This can lead to disruption of activities such as breathing, movement, and social life. To this end, various therapeutic strategies such as medication therapy, cell therapy and tissue transplantation have been used or studied in muscle regeneration. However, there is no effective and well-defined clinical approach for treatment of muscle injuries and the severity of muscle injuries increase with age in most cases. Therefore, investigation for finding new and effective clinical approach for muscle regeneration is one of the most important issues in basic and clinical researches. Tissue engineering is considered as one of the promising and newest approach for skeletal muscle tissue regeneration and provides an appropriate model for personalized medicine and basic researches that can be used in personalized medicine and basic research. Besides biomaterials and cells, inducing factors are another element of tissue engineering. These factors influence epigenetic mechanisms and signaling pathway, thereby inducing proliferation, differentiation, and migration of cells used in muscle tissue engineering, and accelerates muscle formation in vitro. Recently, small molecules have been used as alternatives to growth factors or along with other inducing factors in muscle tissue engineering. Since they do not induce an immune reaction, penetrate easily to the cells and have a specific molecular target, therefore they have attracted much attention as the cost-effective inducing factors in tissue engineering.
Conclusion:  Taken together, the effective small molecules in muscle tissue engineering can be used with different biomaterial conditions (e.g. hydrogel, decellularized tissue, and synthetic scaffolds) in both in vivo and in vitro, resulting to production of cost effective and highly efficient engineered muscle tissues that help to achieve therapeutical goals of muscle tissue engineering. Herein, we describe tissue engineering and review the small molecules used in skeletal muscle tissue engineering.
Comparison of Postural Control and Functional Balance in Individuals People with Intellectual Disabilities with and Without Developmental Coordination Disorder
Authors: Balayi Esmail , Sedaghati Parisa
Published: January 2021

Introduction: Balance in individual with intellectual disability has a great importance due to the failure to perform motor tasks. The purpose of the present study was to compare postural control and balance function in two groups of individual with intellectually disabled with and without developmental coordination disorder.
Methods: The present study was a cross-sectional and causal-comparative. The statistical population of this study included all students with intellectually disabilities studying in an exceptional school in Rasht in 2019. According to the inclusion and exclusion criteria, 52 people, including 32 students with intellectual disabilities with developmental coordination disorder and 20 students with intellectual disabilities without developmental coordination disorder were purposefully selected. BESS test, Y balance test, Timed Up and Go (TUG) test were used to evaluate postural control, dynamic balance and functional balance, respectively. For statistical analysis, SPSS version 16 software, independent t-test and Mann-Whitney U tests at a significance level of P <0.05 was used.
Results: Based on the results of the present study, a significant difference was observed in functional balance (p = 0.001), and overall score of postural control (p = 0.003), but no significant difference in dynamic balance (p <0.05) was observed between the two groups.
Conclusion: Developmental coordination disorder is highly prevalent among the individual with intellectual disabilities. At the same time, they have poorer postural control and functional balance compared to their peers without developmental coordination disorder. Due to the importance of controlling posture and maintaining proper balance in order to prevent injury of these people who are less physically fit than their peers, it is recommended to sports coaches, occupational therapists, physiotherapists and other related fields to take a variety of balance programs to emphasize on improving their balance.
The Role of Emotional and Social Components of Calms Test and Demographic Characteristics of Students with Stuttering in Yazd City
Authors: Yosefi Mohammad Reza , Ghasemzadeh Sogand , Sadeghiyeh Tahereh , Afrooz Gholam Ali
Published: January 2021

Introduction: Stuttering is a multifaceted disorder that occurs in the natural course of a person’s speech, which accompanied with different behavioral, emotional, social, and attitudinal changes. Therefore, assessing these changes during stuttering is a vital aspect of treating this disorder. This study was done to investigate the relationship between emotional and social components of Calms Test and demographic characteristics of students with stuttering.
Methods: This study was an analytical cross-sectional study (10 months). The sample consisted of 74 students aged 7 to 14 years who were selected by available sampling methods from Speech Therapy Clinics of Yazd in 2020. Calms Test and demographic characteristics questionnaire were used to collect the data. Data were analyzed using SPSS version 16 software, Pearson correlation coefficient, independent t-test and one-way analysis of variance.
Results: Findings showed that there were significant positive relationship between emotional with social component and the age of students with stuttering (p <0.05). However, no significant difference was found between emotional and social components and students' educational levels (p <0.05). Other results showed that male students with stuttering had a better social component than female students.
Conclusion: Assessing the emotional and social components of people with stuttering can examine their knowledge, perception, as well as their sensitivity to the disorder, which is very effective in choosing a treatment strategy.
Remdesivir and Favipiravir Changes Hepato-Renal Profile in COVID-19 patients: A Cross Sectional Observation in Bangladesh
Authors: Ara Perveen Rawshan , Nasir Morshed , Murshed M Mohammad , Naznin Rumana , Ahmed Sonia Nasreen
Published: January 2021

Background: Coronavirus disease (COVID-19) is the current global public health concern. Till date no specific, effective, and approved treatment available. With the rapid increase in rate of infection, repurposing use of anti- viral like remdesivir and favipiravir were considered as an option to find the promising anti-COVID therapeutics. In this study, we aim to observe hepato-renal safety concerns related to these drugs.

Method: A retrospective study done from May 17 to September 9, 2020 on total 1348 hospital records. 182 patients were included in the study, devided into two groups who recieved remdesivir only (RO) and favipiravir only (FO).

Result: Mean age of respective groups are 59.42 (RO) and 54.64 (FO). Average duration of hospital stay was 11 to 12 days. Mortality rate (28.39%) was higher in RO group. Mean± SD of both ALT (70.65± 50.25) and AST (62.25± 25.46) level was increased in RO group than FO group. On the other hand, Blood urea (56.67± 38.40) and serum creatinine (01.70± 02.41) level was higher in FO group. Hematuria was absent in both group, proteinuria was also unremarkable.

Conclusion: In patients with Covid-19 receive remdesivir and favipiravir, showed elevation in the level of hepato- renal markers.
Enhanced Gas and Condensate Recovery: Review of Published Pilot and Commercial Projects
Authors:   Department of Oil and Gas Recovery Ivano-Frankivsk National Technical University of Oil and Gas, Burachok Oleksandr
Published: January 2021

The majority of the Ukrainian gas condensate fields are in the final stage of development. The high level of reservoir energy depletion has caused significant in situ losses of condensed hydrocarbons. Improving and increasing hydrocarbon production is of great importance to the energy independence of Ukraine. In this paper, a review of the pilot and commercial enhanced gas and condensate recovery (EGR) projects was performed, based on published papers and literature sources, in order to identify those projects which could potentially be applied to the reservoir conditions of Ukrainian gas condensate fields. The EGR methods included the injection of dry gas (methane), hydrocarbon solvents (gas enriched with C2–C4 components), or nitrogen and carbon dioxide. The most commonly used and proven method is dry gas injection, which can be applied at any stage of the field’s development. Dry gas and intra-well cycling was done on five Ukrainian reservoirs, but because of the need to block significant volumes of sales gas they are not being considered for commercial application. Nitrogen has a number of significant advantages, but the fact that it increases the dew point pressure makes it applicable only at the early stage, when the reservoir pressure is above or near the dew point. Carbon dioxide is actively used for enhanced oil recovery (EOR) or for geological storage in depleted gas reservoirs. In light of the growing need to reduce carbon footprints, CO2 capture and sequestration is becoming very favourable, especially due to the low multi-contact miscibility pressure, the high density under reservoir conditions, and the good miscibility with formation water. All of these factors make it a good candidate for depleted gas condensate reservoirs.
Wpływ magnesów neodymowych na pomiar paliwa gazowego gazomierzami miechowymi
Authors:   Instytut Nafty i Gazu – Państwowy Instytut Badawczy, Gacek Zbigniew
Published: January 2021

The article deals with the problem of illegal fuel gas consumption among individual consumers in households, especially with regard to gas theft using neodymium magnets attached to diaphragm gas meters. First, the author presents a historical outline of the use of neodymium magnets for the purpose of illegal consumption of fuel gas. The current legal status regarding the requirements for gas meters resistance to tampering and the activities of the Oil and Gas Institute – National Research Institute (INiG – PIB) and Distribution System Operators aimed at eliminating the possibility of illegal gas consumption with the use of neodymium magnets were discussed. Currently possible methods of confirming gas theft using gas meters exposed to the magnetic field of neodymium magnets were presented. Next, the methods of performing at the INiG – PIB laboratory expert examinations of gas meters suspected to be used for illegal gas consumption after their removal from the distribution network were described, and the criteria for assessing these gas meters were given. Based on the expert examinations of gas meters carried out at the Laboratory of Flow Metrology INiG – PIB in the years 2006–2020, a summary of the share of gas meters tampered with the use of neodymium magnets and gas meters with an increased remanence level was presented in relation to performed in a given year expert examinations of gas meters suspected to be used for illegal gas consumption. The methods of counteracting the theft of fuel gas with diaphragm gas meters tampered with the use of neodymium magnets were shown. It has been proved that at present the EC type examination certificate (MID Directive) and the certificate of compliance with the requirements of EN 1359 or OIML R 137-1 & 2 specification do not confirm gas meters resistance to gas theft involving the use of a strong magnetic field. Requirements for new diaphragm gas meters in terms of their resistance to neodymium magnets were presented, and updated criteria for the evaluation of the test results of gas meters exposed to these magnets were given. Finally, a conclusion was proposed regarding the necessity to include provisions on the resistance of diaphragm gas meters to magnetic field in the relevant normative documents for gas meters in order to provide a systemic safeguard for the parties to fuel gas supply contracts.
Falling Shadow Theory with Applications in Hoops
Authors: Borzooei Rajab Ali , Rezaei Gholam Reza , Kologhani Mona Aaly , Jun Young Bae
Published: January 2021

The falling shadow theory is applied to subhoops and filters in hoops. The notions of falling fuzzy subhoops and falling fuzzy filters in hoops are introduced, and several properties are investigated. Relationship between falling fuzzy subhoops and falling fuzzy filters are discussed, and conditions for a falling fuzzy subhoop to be a falling fuzzy filter are provided. Also conditions for a falling shadow of a random set to be a falling fuzzy filter are displayed.
Piedras: Objetos -cósmicos- encontrados
Authors: Battezzati Agustina
Published: January 2021

La participación y utilización en las producciones artísticas contemporáneas de objetos considerados alguna vez ajenos al campo de las artes es ya un asunto cotidiano. Entre muchos de los proyectos artísticos que trabajan con estos objetos, los trabajos interdisciplinarios combinan diversos conocimientos e intervienen, en ocasiones, espacios fuera del ámbito artístico. En este artículo se investiga, a través del análisis del uso de meteoritos en el trabajo de los artistas argentinos Faivovich y Goldberg, cómo este objeto material es capaz de generar una serie de interferencias y de lazos en las artes y en la sociedad. Además, en el artículo se explora cómo la interdisciplinariedad del proyecto acaba generando una reconfiguración recíproca entre la escena artística y las instituciones científicas y estatales con las que trabajan los artistas.
Colaboradores
Authors: Pérez Rojas Nelson
Published: January 2021

Revista Comunicación. Año 41, volumen 29, número 2, julio-diciembre, 2020.
Innovación y transferencia tecnológica en los sectores empresariales de México
Authors: Pérez-Cruz Omar Alejandro
Published: January 2021

En la investigación de que se trata en este artículo, se planteó el objetivo de estimar la relación entre innovación y transferencia tecnológica, en las empresas mexicanas, según el sector empresarial al que ellas se orientan, y distinguiendo entre los sectores que innovan, los que reciben alguna transferencia de las instituciones científicas y tecnológicas. Para cumplirlo se utilizó información económico-administrativa del periodo del 2010 al 2018 de una muestra de empresas de los distintos sectores ubicadas en las 32 entidades de México. Mediante métodos no paramétricos, se obtuvo evidencia suficiente de una relación significativa y positiva entre actividades de innovación y empresas de los sectores construcción y comercio, así como de una relación significativa y positiva entre la transferencia de tecnología y las empresas del sector construcción. Se concluye que las grandes constructoras tienden a ser más innovadoras y reciben mayor transferencia de conocimiento de parte de las instituciones científicas y tecnológicas. Se considera que estos resultados son de interés para empresarios, analistas financieros, tomadores de decisiones en materia de políticas gubernamentales, así como para investigadores, que puedan impulsar políticas de apoyo y fortalecimiento de la innovación en México.
Effect of tagitinin C isolated from kembang bulan [ Tithonia diversifolia (Hemsley) A. Gray] leaves on VEGF and TNF- α expressions of keloid fibroblast
Authors: Wicaksana Arif Yusuf , Nugrahaningsih Dwi Aris Agung , Wahyuningsih Mae Sri Hartati
Published: January 2021

Tagitinin C, an active constituent of Tithonia diversifolia (Hemsley) A. Gray, has been proven caninhibit the collagen deposition of keloid fibroblasts in vitro. However, its mechanism of action has not been widely studied. One possible mechanism involves growth factors and cytokines. Vascular endothelial growth factor (VEGF) and tumor necrosis factor alpha (TNF-α) play an important role in the collagen deposition. The study aimed to evaluate the effect of tagitinin C on VEGF and TNF-α expression in keloid fibroblasts culture. An experimental laboratory study using fibroblast cell lines at passages III and IV was performed. Treatments were divided into two groups i.e. the treatment groups after incubation with tagitinin Cat various concentration of 1, 0.5, 0.25, and 0.125μg/ mL for 72 h, and the control group using culture media without tagitinin C. Following after incubation, the VEGF and TNF-α levels of keloid fibroblast culture supernatant were measured by ELISA. Kruskal-Wallis test continued using Mann-Whitney test or one way Anova continued by independent t test were applied to evaluate the differences between groups. A p value of less than 0.05 was considered statistically significant. The VEGF levels significantly decreases in concentration-dependent manner after treatment of the tagitinin C at various concentrations (p<0.05). However, no significantly difference in TNF-α levels was observed (p> 0.05). In conclusion, tagitinin C decreases the VEGF expression of keloid fibroblasts. However, it has no effect on the TNF-α expression.
Note sur une épizootie récente de fièvre aphteuse en Côte-d'Ivoire
Authors: Couacy-Hymann Emmanuel , Formenty Pierre , Zigbe B. , Ouattara M. , Cacou Pierre-Marie
Published: January 2021

Une vague épizootique de fièvre aphteuse due au type SAT2 a sévi dans les élevages bovins, ovins et porcins en Côte-d'Ivoire. La morbidité peu élevée et la très faible mortalité observées ont amené à préconiser une vaccination uniquement dans les élevages de type intensif et de haute valeur zootechnique.
Etude de la capacité vectorielle de Glossina palpalis gambiensis (Bobo Dioulasso) vis-à-vis de Trypanosoma brucei brucei EATRO 1125
Authors: Kazadi J.M.L. , Van Hees J. , Jochems M. , Kageruka P.
Published: January 2021

Sur 440 mouches ténérales de Glossina palpalis gambiensis nourries une fois sur cobaye infecté chroniquement avec Trypanosoma brucei brucei EATRO 1125, le taux d'infection procyclique s'élève à 2,32 %, tandis que celui de l'infection métacyclique est de 11,29 %, dont 13,19 % chez les mâles et 9,55 % chez les femelles. Aucune différence significative sur la capacité vectorielle n'est observée entre les mâles et les femelles. Le degré de la parasitémie et le pourcentage des formes courtes au moment du repas infectant, combinés aux conditions de maintenance, semblent influencer l'infection chez les mouches.
Etude pharmacocinétique comparée du triclabendazole chez le mouton et le dromadaire
Authors: Oukessou Mohamed , Toutain P.L. , Galtier Pierre , Alvinerie M.
Published: January 2021

Les auteurs décrivent la pharmacocinétique comparée du triclabendazole chez trois dromadaires et quatre moutons qui ont reçu une dose orale unique de 10 mg de triclabendazole par kg de poids vif. Les concentrations plasmatiques de triclabendazole et des métabolites sont déterminées par chromatographie liquide haute performance. L'absence du principe parental chez les deux espèces étudiées correspond à un effet de premier passage hépatique. Il apparaît une différence majeure pour le triclabendazole sulfoxide entre les deux espèces, avec des concentrations deux à trois fois plus faibles chez le dromadaire que chez le mouton.
La place de la brebis dans le circuit de la viande à Maroua (extrême Nord du Cameroun)
Authors: Thys Eric
Published: January 2021

L'importance de la brebis dans le circuit de la viande dans la ville de Maroua (extrême-nord du Cameroun) est mise en évidence à l'aide d'un échantillon prélevé à l'abattoir. 89,6 % des ovins abattus sont des femelles. Le poids moyen d'une carcasse chaude de femelle est de 11,53 + ou - 2,874 kg et l'indice de compacité est de 0,21 + ou - 0,040. Une très forte homogénéité de poids et de gabarit existe entre les classes d'âge. On en déduit que les carcasses de 11 à 12 kg produites économiquement répondraient mieux aux besoins du marché de la viande. Les reproductrices à réformer pourraient recevoir une alimentation de finition bon marché.
Epizootie de fièvre aphteuse au Nord-Bénin durant la saison sèche 1990-1991
Authors: Dehoux J.P. , Hounsou Vé G.
Published: January 2021

Durant la saison sèche de 1990-1991 (novembre à mai), une épizootie de fièvre aphteuse a ravagé le nord du Bénin. Provenant des pays voisins, la maladie s'est répandue très rapidement dans la région, essentiellement par l'intermédiaire des troupeaux transhumants. Aucune mesure n'existe jusqu'à ce jour au Bénin pour limiter cette infection endémique qui connaît régulièrement des flambées de recrudescence. Des prélèvements sérologiques ont révélé que les types viraux A, O et SAT 2 ont sévi durant cette épizootie.
La lutte par piégeage contre Glossina fuscipes fuscipes pour la protection de l'élevage en République centrafricaine. II. Caractéristiques du piège bipyramidal
Authors: Gouteux J.P.
Published: January 2021

L'auteur donne la description et le mode de fabrication du piège bipyramidal. Ce piège fait actuellement l'objet d'un programme d'évaluation en vraie grandeur dans le cadre d'une lutte anti-tsé-tsé autogérée par les éleveurs semi-nomades de République centrafricaine (Mbororo). Il est démontable, facilement transportable et ne demande aucune manipulation complexe. Le prix de revient d'un piège est d'environ 30 FF au maximum (1500 francs CFA).
Influence de la castration partielle et totale sur les paramètres d'abattage et de découpe des béliers Poulfouli de l'extrême-nord du Cameroun
Authors: Thys Eric , Hardouin Jacques , Verhulst A.
Published: January 2021

Dans le cadre de l'étude sur l'influence de la castration totale et partielle sur les performances des béliers Poulfouli de l'extrême-nord du Cameroun, les auteurs ont comparé les paramètres d'abattage et de découpe des différentes catégories d'animaux afin de dégager les avantages des uns et des autres par rapport au marché de la viande et d'expliquer certaines observations faites antérieurement en matière d'indices alimentaires. Les auteurs constatent que l'intérêt d'abattre des animaux castrés à la pince est minime, malgré certains avantages de rendement. La technique favorise le développement proportionnel de l'arrière-train, qui n'a pas, dans le contexte local, la même importance qu'ailleurs. Le prix supérieur du castré sur le marché le rend également moins attrayant pour le boucher. La tendance à déposer plus de graisse, chez le castré, est à l'origine des indices de consommation plus élevés. Enfin, on a pu constater que le castré partiel par la méthode du short scrotum présente des performances similaires à celles des béliers entiers.
Note sur l'utilisation du tannate de berbérine Bertamix ND ) comme activateur de croissance dans l'élevage des porcs au Viêt-nam
Authors: Tuong N.P.
Published: January 2021

Les auteurs présentent les résultats d'une étude sur l'effet du tannate de berbérine (BertamixND), comme activateur de croissance pour les porcs, extrait de Cossinium fenestratum (Gaertn) Colebr. et de l'écorce du tronc de Terminalia chebula Retz, deux plantes largement disponibles au Viêt-nam. L'addition du BertamixND au taux de 5 p. 1000 dans le régime alimentaire de porcs âgés de 3 à 5 mois entraîne un gain de poids de 21 % et améliore l'indice de consommation de 17,3 % : soit une réduction de 0,76 UF/kg de gain de poids. Son intérêt pour accroître les performances de croissance chez le porc charcutier au Viêt-nam est discuté.
Réponse de Brachiaria ruziziensis Germain et Evrard à la fertilisation azotée et à différents rythmes d'exploitation en Adamaoua, Cameroun
Authors: Pamo E.T.
Published: January 2021

A la Station de Recherches Zootechniques de Wakwa (Cameroun) la réponse de Brachiaria ruziziensis Germain et Evrard à de faibles doses d'azote et à différentes fréquences de coupe à été évaluée. Un dispositif factoriel avec sept doses, sous forme de sulfate d'ammoniaque à 21 % (0, 40, 60, 70, 80 et 90 unités d'azote à l'hectare), et trois fréquences de coupe (30, 45 et 60 jours) en quatre répétitions a été utilisé. Les résultats sur trois années ont montré que la fertilisation azotée assurait une augmentation significative (P < 0,01) mais non de la production fourragère de Brachiaria ruziziensis, mais régulière. Les placeaux non fertilisés ont produit de 1985 à 1987, respectivement, 2,36, 2,31 et 1,19 t de MS contre un maximum de 3,94, 4,18 et 3,46 t de MS pour les parcelles fertilisées avec des doses respectives de 90, 80 et 80 unités de N par ha, soit une augmentation par rapport aux témoins de 66,80 et 76 %. Ces résultats relativement satisfaisants ne sont pas aussi intéressants que ceux obtenus avec l'azote en présence du phosphore et du potassium. Les fréquences de coupe de 30 et 45 jours ont donné les résultats les plus réguliers. Pendant l'étude, aucune différence significative (P > 0,01) entre les trois fréquences n'a été constatée.
Recherche dans trois élevages industriels de poules en Côte-d'Ivoire des lésions de l'intoxication par l'aflatoxine B1
Authors: Wyers M. , Mobio M.G. , Schricke E. , Nguetta A.
Published: January 2021

La recherche systématique d'une contamination des aliments par l'aflatoxine B1 ainsi que des lésions révélatrices d'une aflatoxicose aiguë ou chronique a été pratiquée dans trois lots de poules élevées industriellement en Côte-d'Ivoire. Les taux de contamination observés demeurent faibles bien que 6 à 10 fois supérieurs aux normes officielles préconisées. Aucune lésion évocatrice d'une intoxication aiguë ou chronique par les aflatoxines n'a par ailleurs été observée. L'ingestion de doses faibles et répétées ne permet pas cependant d'exclure totalement une répercussion sur les résultats technico-économiques des animaux, soit par une action directe du toxique, soit par le biais de l'installation d'un état de dépression immunitaire
Virulence factors in Escherichia coli strains isolated from pigs in the Ribeirao Preto region, State of Sao Paulo, Brazil
Authors: Carvalho A.C.F.B. , Avila F.A. , Schocken Iturrino R.P. , Quintana J.L. , Albertini P.E.G.
Published: January 2021

Trois cents écouvillons fécaux ont été réalisés sur des porcs atteints de diarrhée dans des fermes de la région de Ribeirao Preto dans l'Etat de Sao Paulo, au Brésil. Cent souches d'Escherichia coli ont été ainsi isolées et étudiées pour rechercher la production des entérotoxines thermolabiles (TL) et thermostables (STRa et STb) ainsi que la présence des facteurs de colonisation F4, F5, F6. Leur sensibilité a également été testée à l'égard de 14 agents antibiotiques et chimiothérapeutiques. La production des entérotoxines a été la suivante pour 100 souches : 24 STb, cinq LT et trois Sta. Lors de la réaction d'hémagglutination mannose résistante, une souche a réagi positivement avec des globules rouges de mouton, de poulet, de cheval et d'homme. Une autre a réagi de même avec des globules rouges de cobaye, de mouton, de poulet, de cheval et d'homme. Mais ces deux souches ont cependant réagi négativement aux facteurs de colonisation F4, F5, F6 en présence du test d'agglutination sur lame. Toutes ces souches ont été résistantes à au moins un des antibiotiques étudiés, les pourcentages les plus élevés étant enregistrés avec la pénicilline, la tétracycline et la céphalosporine. Les résultats de cette étude révèlent aussi l'existence possible de nouveaux facteurs de colonisation, autres que F4, F5 et F6
Prévalence de Sarcocystis sp. chez les ovins et caprins au Nord-Nigeria
Authors: Kudi A.C. , Aganga A.O. , Ogbogu V.C. , Umoh J.U.
Published: January 2021

Des prélèvements tissulaires provenant de l'oesophage et du diaphragme ont été collectés sur 400 moutons et 400 chèvres provenant des abattoirs de la région d'étude. Parmi eux, 36 présentaient des kystes sarcocystiques chez les moutons et 56 chez les chèvres. Ceux des moutons mesuraient 35,7 à 500 µm dans leur longueur. L'épaisseur de la paroi était de 2,4 µm. Sarcocystis tenella a été identifiée. Chez la chèvre, les kystes mesuraient de 98 à 700 µm avec une paroi de 2,7 µm. Sarcocystis capricanis a été identifiée. Pour les deux espèces, la fréquence des localisations était plus élevée dans l'oesophage que dans le diaphragme.
Les dominantes du parasitisme helminthique chez les bovins en Ituri (Haut-Zaïre). III. Répartition géographique et prévalence des principaux helminthes
Authors: Chartier C. , Bushu M. , Kamwenga D.
Published: January 2021

Une étude nécropsique réalisée dans onze abattoirs de l'Ituri (Haut-Zaïre) a permis de déterminer la distribution géographique et les prévalences des principaux helminthes des bovins adultes. Les trématodes, à l'exception des paramphistomes, ont une répartition très hétérogène. La prévalence de Fasciola gigantica oscille entre 9 et 72 p. 100 selon les sites mais ces variations ne peuvent être corrélées à des facteurs topographiques ou climatologiques. L'infestation à Schistosoma bovis est également très variable (12,5 à 72 p. 100) et semble absente des zones centrales montagneuses. Dicrocoelium hospes n'existe que dans la partie nord de l'Ituri, avec une prévalence modérée d'environ 35 p. 100. Les nématodes, à l'inverse, ont une distribution relativement homogène sur l'ensemble de l'Ituri. Les prévalences sont élevées pour les strongles digestifs des genres Haemonchus, Cooperia et Oesophagostomum (plus de 60 p. 100). La cysticercose à Cysticercus bovis touche 10 à 14 p. 100 des bovins dans les parties centre et sud de l'Ituri tandis que la zone nord est pratiquement indemne de cette parasitose.