bluuebunny/crossref_metadata_2025 huggingface dataset:
Attitude Determination for GRACE-FO: Reprocessing the Level-1A SC and IMU Data
Authors: Yang Fan , Liang Lei , Wang Changqing , Luo Zhicai
Published: December 2021

The satellite gravity mission GRACE(-FO) has not yet reached its designed baseline accuracy. Previous studies demonstrated that the deficiency in the sensor system or the related signal processing might be responsible, which in turn motivates us to keep revising the sensor data processing, typically the spacecraft’s attitude. Many efforts in the past have been made to enhance the attitude modeling for GRACE, for instance, the latest release reprocesses the attitude by fusing the angular acceleration with the star camera/tracker (SC) measurements, which helps to reduce the error in Level-2 temporal gravity fields. Therefore, in addition to GRACE, revising GRACE-FO attitude determination might make sense as well. This study starts with the most original raw GRACE-FO Level-1A data including those from three SCs and one IMU (Inertial Measurement Unit) sensors, and manage to generate a new publicly available Level-1B attitude product called HUGG-01 covering from June 2018 to December 2020, using our independently-developed software. The detailed treatment of individual payload is present in this study, and an indirect Kalman filter method is introduced to fuse the multiple sensors to acquire a relatively stable and precise attitude estimation. Unlike the direct SC combination method with a predefined weight as recommended in previous work, we propose an involvement of each SC measurement in the Kalman filter to enable a dynamic weight adjustment. Intensive experiments are further carried out to assess the HUGG-01, which demonstrate that the error level of HUGG-01 is entirely within the design requirement, i.e., the resulting KBR pointing variations are well controlled within 1 mrad (pitch), 5 mrad (roll) and 1 mrad (yaw). Moreover, comparisons with the official JPL-V04 attitude product demonstrate an equivalent performance in the low-to-middle spectrum, with even a slightly lower noise level (in the high spectrum) than JPL-V04. Further analysis on KBR range-rate residuals and gravity recovery on January 2019 indicates that, i.e., RMS of the difference (HUGG-01 minus JPL-V04) for the range rate is less than 3.234×10−8 m/s, and the amplitude of geoid height difference is approximately 0.5 cm. Both differences are below the sensitivity of the state-of-the-art satellite gravity mission, demonstrating a good agreement between HUGG-01 and JPL-V04.
Eddies in the Marginal Ice Zone of Fram Strait and Svalbard from Spaceborne SAR Observations in Winter
Authors: Kozlov Igor E. , Atadzhanova Oksana A.
Published: December 2021

Here we investigate the intensity of eddy generation and their properties in the marginal ice zone (MIZ) regions of Fram Strait and around Svalbard using spaceborne synthetic aperture radar (SAR) data from Envisat ASAR and Sentinel-1 in winter 2007 and 2018. Analysis of 2039 SAR images allowed identifying 4619 eddy signatures. The number of eddies detected per image per kilometer of MIZ length is similar for both years. Submesoscale and small mesoscale eddies dominate with cyclones detected twice more frequently than anticyclones. Eddy diameters range from 1 to 68 km with mean values of 6 km and 12 km over shallow and deep water, respectively. Mean eddy size grows with increasing ice concentration in the MIZ, yet most eddies are detected at the ice edge and where the ice concentration is below 20%. The fraction of sea ice trapped in cyclones (53%) is slightly higher than that in anticyclones (48%). The amount of sea ice trapped by a single ‘mean’ eddy is about 40 km2, while the average horizontal retreat of the ice edge due to eddy-induced ice melt is about 0.2–0.5 km·d–1 ± 0.02 km·d–1. Relation of eddy occurrence to background currents and winds is also discussed.
Dynamic Relationship Study between the Observed Seismicity and Spatiotemporal Pattern of Lineament Changes in Palghar, North Maharashtra (India)
Authors: Nath Biswajit , Singh Ramesh P. , Gahalaut Vineet K. , Singh Ajay P.
Published: December 2021

The Palghar region (north Maharashtra, India), located in the northwestern part of the stable continental region of India, experienced a low magnitude earthquake swarm, which was initiated in September 2018 and is continuing to date (as of October 2021). From December 2018 to December 2020, ~5000 earthquakes with magnitudes from M1.2 to M3.8 occurred in a small region of 20 × 10 km2. These earthquakes were probably triggered by fluid migration during seasonal rainfall. In this study, we have used multi-temporal Landsat satellite data of the year 2000, 2015, 2018, 2019, and 2020, extracted lineaments, and studied the changes in frequency and pattern of lineaments before and after the initiation of the swarm in the Palghar region. An increase in the lineament density and amount of rainfall are found to be associated with the increasing frequency of earthquakes.
A High-Dimensional and Small-Sample Submersible Fault Detection Method Based on Feature Selection and Data Augmentation
Authors: Zhao Penghui , Zheng Qinghe , Ding Zhongjun , Zhang Yi , Wang Hongjun , Yang Yang
Published: December 2021

The fault detection of manned submersibles plays a very important role in protecting the safety of submersible equipment and personnel. However, the diving sensor data is scarce and high-dimensional, so this paper proposes a submersible fault detection method, which is made up of feature selection module based on hierarchical clustering and Autoencoder (AE), the improved Deep Convolutional Generative Adversarial Networks (DCGAN)-based data augmentation module and fault detection module using Convolutional Neural Network (CNN) with LeNet-5 structure. First, feature selection is developed to select the features that have a strong correlation with failure event. Second, data augmentation model is conducted to generate sufficient data for training the CNN model, including rough data generation and data refiners. Finally, a fault detection framework with LeNet-5 is trained and fine-tuned by synthetic data, and tested using real data. Experiment results based on sensor data from submersible hydraulic system demonstrate that our proposed method can successfully detect the fault samples. The detection accuracy of proposed method can reach 97% and our method significantly outperforms other classic detection algorithms.
Power-Efficient Wireless Coverage Using Minimum Number of UAVs
Authors: Sawalmeh Ahmad , Othman Noor Shamsiah , Liu Guanxiong , Khreishah Abdallah , Alenezi Ali , Alanazi Abdulaziz
Published: December 2021

Unmanned aerial vehicles (UAVs) can be deployed as backup aerial base stations due to cellular outage either during or post natural disaster. In this paper, an approach involving multi-UAV three-dimensional (3D) deployment with power-efficient planning was proposed with the objective of minimizing the number of UAVs used to provide wireless coverage to all outdoor and indoor users that minimizes the required UAV transmit power and satisfies users’ required data rate. More specifically, the proposed algorithm iteratively invoked a clustering algorithm and an efficient UAV 3D placement algorithm, which aimed for maximum wireless coverage using the minimum number of UAVs while minimizing the required UAV transmit power. Two scenarios where users are uniformly and non-uniformly distributed were considered. The proposed algorithm that employed a Particle Swarm Optimization (PSO)-based clustering algorithm resulted in a lower number of UAVs needed to serve all users compared with that when a K-means clustering algorithm was employed. Furthermore, the proposed algorithm that iteratively invoked a PSO-based clustering algorithm and PSO-based efficient UAV 3D placement algorithms reduced the execution time by a factor of ≈1/17 and ≈1/79, respectively, compared to that when the Genetic Algorithm (GA)-based and Artificial Bees Colony (ABC)-based efficient UAV 3D placement algorithms were employed. For the uniform distribution scenario, it was observed that the proposed algorithm required six UAVs to ensure 100% user coverage, whilst the benchmarker algorithm that utilized Circle Packing Theory (CPT) required five UAVs but at the expense of 67% of coverage density.
Long-Term Observation of the Quasi-3-Hour Large-Scale Traveling Ionospheric Disturbances by the Oblique-Incidence Ionosonde Network in North China
Authors: Zhang Ruijiao , Chen Gang , Li Yaxian , Zhang Shaodong , Gong Wanlin , He Zhiqiu , Zhang Min
Published: December 2021

The oblique-incidence ionosonde network in North China is a very unique system for regional ionospheric observation. It contains 5 transmitters and 20 receivers, and it has 99 ionospheric observation points between 22.40° N and 33.19° N geomagnetic latitudes. The data of the ionosonde network were used to investigate the statistical characteristics of the quasi-3-h large-scale traveling ionospheric disturbances (LSTIDs). From September 2009 to August 2011, 157 cases of the quiet-time LSTIDs were recorded; 110 cases traveled southward, 46 cases traveled southwestward and only 1 case traveled southeastward. The LSTIDs mainly appeared between 10:00 and 19:00 LT in the months from September to the following May. We compared the data of the Beijing, Mohe and Yakutsk digisondes and found that the LSTIDs are most likely to come from the northern auroral region. These LSTIDs may be induced by the atmospheric gravity waves (AGWs) and presented obvious seasonal and diurnal varying features, indicating that the thermospheric wind field has played an important role.
Development of Emotional Competencies as a Teaching Innovation for Higher Education Students of Physical Education
Authors: Fernández-Gavira Jesús , Castro-Donado Santiago , Medina-Rebollo Daniel , Bohórquez M. Rocío
Published: December 2021

The objective of the work presented is to develop emotional competencies in higher-education students by following Bisquerra’s five-block model. With the methodological support of adventure pedagogy and gamification, students improve their emotional competencies, as well as the basic competencies of the degree in Physical Activity and Sport Sciences and the specific ones of the subject. The proposal, which is entitled “In search of my Avatar”, aims to make sure that, in their future as sports professionals, they will be able to serve their customers in a fully competent way. The work presented proposes different activities of emotional education to work transversally in higher education, ranging from conflict management and the use of language to improve the relationship with oneself and with others. The proposal was developed for the Degree in Sports Science and for the subject of Physical Activity and Sport in the Natural Environment, but with certain adaptations, it could be transferred to any university-degree subject.
Strategy for Optimal Grid Planning and System Evaluation of Networked Distribution Systems
Authors: Lee Junwoo , Yoon Myungseok , Chae Wookyu , Kim Woohyun , Choi Sungyun
Published: December 2021

The meshed network may become a standard for future distribution systems owing to its various benefits regarding voltage profile, reliability, losses, and the distributed generation (DG). Therefore, in Korea, there is a plan to introduce an advanced form of meshed network called a networked distribution system (NDS). This refers to a system with permanent linkages between four distribution lines (DLs) and N×N communication-based protection. To properly introduce NDS to an actual grid, this study proposes a strategy for optimal grid planning and system evaluation. Four different topologies and four practical indicators are explained. First, load imbalance is used to find the optimal grid that maximizes the load capacity. Second, line overload, fault current, and temporary overvoltage (TOV) were used to evaluate the necessity of load transfer, availability of circuit breakers, relay settings, and system stability. PSCAD/EMTDC were employed for the simulation. This study establishes the construction and evaluation guidelines of NDS for distribution system operators (DSOs).
Effects of Personality Traits and Team Context on Individual Innovative Behavior (Exploitation and Exploration)
Authors: Park Mihye , Kim Seongsu
Published: December 2021

This study analyzed how personality traits, team context, and the interaction between the two affect individual exploitation and exploration. Analyses of data from two Korean firms revealed that personality traits have an effect on individual exploitation and exploration activities. Specifically, the authors found that those with high-level openness to experiences engaged in high-level exploration activities. By contrast, those with high-level conscientiousness pursued high-level exploitation activities. For individual exploitation and exploration activities, the team context perceived by individuals was also important. Furthermore, this study confirmed the effect of the interaction between personality traits and team context on individual exploitation and exploration activities.
Tourism and Cultural Sustainability: Views and Prospects from Cyclades, Greece
Authors: Terkenli Theano S. , Georgoula Vasiliki
Published: December 2021

The objective of this paper is to explore cultural tourism perceptions, practices, concerns and prospects among local residents, tourists and business representatives in the Cycladic Islands, specifically three sites (Andros, Syros and Santorini). The concept and framework of cultural sustainability are employed to analyze the variable interrelationships between culture and tourism in the development of cultural tourism and in overall local sustainability, from a bottom-up/destination perspective. The methodological approach was an on-site exploratory questionnaire survey, effectuated in the context of the SPOT Horizon 2020 EU project, on cultural tourism in the Cyclades. Our findings show that the role of culture as an actual tourism attraction and the potential for further growth in cultural tourism, and consequently local development, are broadly recognized. However, the role of tourism in cultural development, management and appropriation is viewed with a certain degree of trepidation and ambivalence. Culture and tourism emerge from the results of this research study as positively interlinked in the minds of the locals, the visitors and the entrepreneurs involved in cultural tourism and tourism more generally. Despite the fact that it is mostly privately driven, the culture–tourism relationship is viewed as holding great potential for all sides involved and for local cultural and overall sustainability.
An Automatic Tool for the Determination of Housing Rental Prices: An Analysis of the Italian Context
Authors: Tajani Francesco , Di Liddo Felicia , Ranieri Rossana , Anelli Debora
Published: December 2021

In the last decades, some global events such as the economic crisis of 2008 and the COVID-19 emergency of 2020, have generated more attention towards the housing rental market and its capacity to meet several social needs. In order to study the existent demand for houses, then define the interventions on the residential assets to make them more affordable for the most fragile population groups, adequate evaluation tools are required. With reference to the residential property segment of five metropolitan cities located in the Italian territory, the present research is aimed at analyzing the contribution of the most influencing factors on rental prices. In particular, this research refers to the rented properties of the second half of 2019, with a set of variables that represent the intrinsic and extrinsic factors of the local market. The implementation of an automated valuation model allows the determination of the most significant factors and the functional relationships that they have with housing rental fees. The outputs obtained could support the improvement of equitable public housing policies or could guide private investment decisions, such as refurbishment interventions of certain significant factors that could increase the market rental value. This study is the first step in wider research that is currently in progress, which aims to investigate the effects of the existing COVID-19 pandemic on the residential rental market.
A Novel Model Based on DA-RNN Network and Skip Gated Recurrent Neural Network for Periodic Time Series Forecasting
Authors: Huang Bingqing , Zheng Haonan , Guo Xinbo , Yang Yi , Liu Ximing
Published: December 2021

Deep learning models are playing an increasingly important role in time series forecasting with their excellent predictive ability and the convenience of not requiring complex feature engineering. However, the existing deep learning models still have shortcomings in dealing with periodic and long-distance dependent sequences, which lead to unsatisfactory forecasting performance on this type of dataset. To handle these two issues better, this paper proposes a novel periodic time series forecasting model based on DA-RNN, called DA-SKIP. Using the idea of task decomposition, the novel model, based on DA-RNN, GRU-SKIP and autoregressive component, breaks down the prediction of periodic time series into three parts: linear forecasting, nonlinear forecasting and periodic forecasting. The results of the experiments on Solar Energy, Electricity Consumption and Air Quality datasets show that the proposed model outperforms the three comparison models in capturing periodicity and long-distance dependence features of sequences.
The Efficiency of Drones Usage for Safety and Rescue Operations in an Open Area: A Case from Poland
Authors: Tuśnio Norbert , Wróblewski Wojciech
Published: December 2021

The use of unmanned aerial systems (UAS) is becoming increasingly frequent during search and rescue (SAR) operations conducted to find missing persons. These systems have proven to be particularly useful for operations executed in the wilderness, i.e., in open and mountainous areas. The successful implementation of those systems is possible thanks to the potential offered by unmanned aerial vehicles (UAVs), which help achieve a considerable reduction in operational times and consequently allow a much quicker finding of lost persons. This is crucial to enhance their chances of survival in extreme conditions (withholding hydration, food and medicine, and hypothermia). The paper presents the results of a preliminary assessment of a search and rescue method conducted in an unknown terrain, where groups were coordinated with the use of UAVs and a ground control station (GCS) workstation. The conducted analysis was focused on assessing conditions that would help minimise the time of arrival of the rescue team to the target, which in real conditions could be a missing person identified on aerial images. The results of executed field tests have proven that the time necessary to reach injured persons can be substantially shortened if imaging recorded by UAV is deployed, as it considerably enhances the chance of survival in an emergency situation. The GCS workstation is also one of the crucial components in the search system, which assures image transmission from the UAV to participants of the search operation and radio signal amplification in a difficult terrain. The effectiveness of the search system was tested by comparing the arrival times of teams equipped with GPS and a compass and those not equipped with such equipment. The article also outlined the possibilities of extending the functionality of the search system with the SARUAV module, which was used to find a missing person in Poland.
The State-of-the-Art Estimation of Groundwater Recharge and Water Balance with a Special Emphasis on India: A Critical Review
Authors: Sajil Kumar Pazhuparambil Jayarajan , Schneider Michael , Elango Lakshmanan
Published: December 2021

Groundwater recharge estimation is essential for sustainable water management and water supply schemes. In this paper, we review groundwater recharge estimation techniques and identify the appropriate methods by considering India’s hydrological and climatic conditions. Significant components of recharge, factors affecting groundwater recharge, aquifer systems of India, and historical groundwater recharge estimation practices are reviewed. Currently used recharge estimation methods are assessed based on case studies. The most popular estimation methods are studied and compared based on their application in various regions. It is observed that the accuracy of the recharge estimates is largely influenced by false assumptions, the possibility of erroneous measurements, a potential lack of reliable data, and a variety of problems associated with parameter estimation. The suitability of different methods for a region is found to depend on time and space considerations, the objective of the study, hydrogeological condition, and availability of data. In Indian conditions, it is suggested to use water table fluctuation and water balance methods for the recharge estimation, provided that accurate water level measurements are assured.
The Differential Impact of Various Injection Pressures on the Exergy of a Diesel Engine Using Biodiesel-Diesel Fuel Blends
Authors: Kiani Deh Kiani Mostafa , Rostami Sajad , Najafi Gholamhassan , Mazlan Mohamed
Published: December 2021

Contrary to energy, exergy may be destroyed due to irreversibility. Exergy analysis can be used to reveal the location, and amount of energy losses of engines. Despite the importance of the exergy analysis, there is a lack of information in this area, especially when the engine is fueled with biodiesel–diesel fuel blends under various injection operating parameters. Thus, in this research, the exergy analysis of a direct-injection diesel engine using biodiesel–diesel fuel blends was performed. The fuel blends (B0, B20, B40, and B100) were injected into cylinders at pressures of 200 and 215 bars. Moreover, the simulation of exergy and energy analyses was done by homemade code. The simulation model was verified by compression of experimental and simulation in-cylinder pressure data. The results showed there was good agreement between simulation data and experimental ones. Results indicated that the highest level of in-cylinder pressure at injection pressure of 215 bars is more than that of 200 bars. Moreover, by increasing the percentage of biodiesel, the heat transfer exergy, irreversibility, burnt fuel, and exergy indicator decreased, but the ratio of these exergy parameters (except for heat transfer exergy) to fuel exergy increased. These ratios increased from 46 to 50.54% for work transfer exergy, 16.57 to 17.97% for irreversibility, and decreased from 16 to 15.49% for heat transfer exergy. In addition, these ratios at 215 bars are higher than at 200 bars for all fuels. However, with increasing the injection pressure and biodiesel concentration in fuel blends, the exergy and energy efficiencies increased.
Consumer Ethnocentrism and Country of Origin: Effects on Online Consumer Purchase Behavior in Times of a Pandemic
Authors: Camacho Luis José , Ramírez-Correa Patricio Esteban , Salazar-Concha Cristian
Published: December 2021

Electronic commerce has shown exponential growth over the past decade, but the impact of COVID-19 has exceeded all expectations. Based on the theory of planned behavior, this paper aims to investigate the relationship between consumer ethnocentrism and internet purchase behavior in times of pandemics. Data was collected from 294 online purchasers, and the analysis was conducted utilizing a Partial Least Squares Structural Equation Modeling approach. The results indicate no significant impact on the relationship between the planned online purchase behavior and the country of origin when consumers face a health crisis. Additionally, the outcomes show that attitude toward online shopping positively affects online purchase behavior.
FPV for Sustainable Electricity Generation in a Large European City
Authors: Popa Bogdan , Vuta Liana Ioana , Dumitran Gabriela Elena , Picioroaga Irina , Calin-Arhip Madalina , Porumb Radu-Florin
Published: December 2021

There is a huge interest worldwide related to continuously increasing the use of renewable energy sources (RES) for electricity generation. Romania, at this moment, even though it has to attain a share of 30.7% of RES from total energy consumption by 2030, does not have any major investment project of this kind in the near future. Photovoltaic (PV) is one of the most promising technologies, with decreasing prices for PV panels but with the disadvantage of large, needed surfaces. This study presents a solution to install PV panels where there is a need for electricity, in a large city, by using the surface of a reservoir. “Lacul Morii” Reservoir in Bucharest is the choice for the case study. The insolation and the possibility to install floating PV, as well as electricity generation, benefits for water quality and carbon dioxide (CO2) emissions reduction are assessed, and even the installation of charging stations for electric bikes and cars. The results are very promising, and the main conclusion is that, after its realization, the floating photovoltaic (FPV) plant on “Lacul Morii” Reservoir will be a source of clean electricity and a demonstration project on how to benefit from solar energy to produce electricity in large cities where there are reservoirs.
Impact of Institutions and Human Capital on CO2 Emissions in EU Transition Economies
Authors: Bayar Yilmaz , Smirnov Vladimir , Danilina Marina , Kabanova Natalia
Published: December 2021

Environmental degradation is one of the most significant problems of the globalized world. This paper explores the impact of institutional development and human capital on CO2 emissions in 11 EU transition economies over the period of 2000–2018 through co-integration analysis. The co-integration analysis revealed that human capital negatively affected CO2 emissions in Croatia, the Czech Republic, Hungary, and Slovenia, and that institutions had a negative impact on CO2 emissions in the Czech Republic. However, both institutions and human capital positively affected CO2 emissions in Latvia and Lithuania.
Modeling Urban Road Scenarios to Evaluate Intersection Visibility
Authors: González-Gómez Keila , Rollins Derrick K. , Castro María
Published: December 2021

Road safety is key to sustainable mobility. Rapid technological advances have allowed several road safety-related analyses, previously performed in situ, to be conducted virtually. These virtual analyses benefit understanding of how roads operate and how users perceive them. Additionally, they facilitate the assessment of several parameters that are fundamental to road design and operation. The available sight distance (ASD) is one of these parameters that, if not provided adequately, could alter the proper functioning of roads. This study presents a framework to assess the impact of certain features on visibility. First, the ASD is estimated using a geographic information system (GIS)-based procedure with LiDAR-derived three-dimensional (3D) models. Afterward, obstructions are detected and categorized. If the obstruction cannot be removed, their redesign or relocation is simulated to re-run the analysis. These simulations are performed using 3D city objects, and their results are statistically evaluated, providing evidence as to their effects on visibility. The results proved that the procedure helped achieve the efficient use of roadside space, while including safety concerns. Additionally, this study reflects the need for more inspections on the impact of on-street parking on drivers’ fields of view.
Expansion of CD56dimCD16neg NK Cell Subset and Increased Inhibitory KIRs in Hospitalized COVID-19 Patients
Authors: Casado José L. , Moraga Elisa , Vizcarra Pilar , Velasco Héctor , Martín-Hondarza Adrián , Haemmerle Johannes , Gómez Sandra , Quereda Carmen , Vallejo Alejandro
Published: December 2021

Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV-2) infection induces elevated levels of inflammatory cytokines, which are mainly produced by the innate response to the virus. The role of NK cells, which are potent producers of IFN-γ and cytotoxicity, has not been sufficiently studied in the setting of SARS-CoV-2 infection. We confirmed a different distribution of NK cell subsets in hospitalized COVID-19 patients despite their NK cell deficiency. The impairment of this innate defense is mainly focused on the cytotoxic capacity of the CD56dim NK cells. On the one hand, we found an expansion of the CD56dimCD16neg NK subset, lower cytotoxic capacities, and high frequencies of inhibitory 2DL1 and 2DL1/S1 KIR receptors in COVID-19 patients. On the other hand, the depletion of CD56dimCD16dim/bright NK cell subsets, high cytotoxic capacities, and high frequencies of inhibitory 2DL1 KIR receptors were found in COVID-19 patients. In contrast, no differences in the distribution of CD56bright NK cell subsets were found in this study. These alterations in the distribution and phenotype of NK cells might enhance the impairment of this crucial innate line of defense during COVID-19 infection.
Genetic Variability among Swine Influenza Viruses in Italy: Data Analysis of the Period 2017–2020
Authors: Chiapponi Chiara , Prosperi Alice , Moreno Ana , Baioni Laura , Faccini Silvia , Manfredi Roberta , Zanni Irene , Gabbi Valentina , Calanchi Irene , Fusaro Alice , Beato Maria Serena , Cavicchio Lara , Torreggiani Camilla , Alborali Giovanni Loris , Luppi Andrea
Published: December 2021

Swine play an important role in the ecology of influenza A viruses (IAVs), acting as mixing vessels. Swine (sw) IAVs of H1N1 (including H1N1pdm09), H3N2, and H1N2 subtypes are enzootic in pigs globally, with different geographic distributions. This study investigated the genetic diversity of swIAVs detected during passive surveillance of pig farms in Northern Italy between 2017 and 2020. A total of 672 samples, IAV-positive according to RT-PCR, were subtyped by multiplex RT-PCR. A selection of strains was fully sequenced. High genotypic diversity was detected among the H1N1 and H1N2 strains, while the H3N2 strains showed a stable genetic pattern. The hemagglutinin of the H1Nx swIAVs belonged to HA-1A, HA-1B, and HA-1C lineages. Increasing variability was found in HA-1C strains with the circulation of HA-1C.2, HA-1C.2.1 and HA-1C.2.2 sublineages. Amino acid deletions in the HA-1C receptor binding site were observed and antigenic drift was confirmed. HA-1B strains were mostly represented by the Δ146-147 Italian lineage HA-1B.1.2.2, in combination with the 1990s human-derived NA gene. One antigenic variant cluster in HA-1A strains was identified in 2020. SwIAV circulation in pigs must be monitored continuously since the IAVs’ evolution could generate strains with zoonotic potential.
Post-infectious IBS: a New Look at an Old Problem
Authors:   Omsk State Medical University, Gaus O.V. , Livzan M.A.
Published: December 2021

The high prevalence and heterogeneity of irritable bowel syndrome (IBS), the lack of effective therapy regimens require the determination of individual phenotypes of the disease. One of the phenotypes is post-infectious IBS (PI-IBS) associated with an episode of acute intestinal infection of bacterial or viral etiology. Special pathogenetic factors are involved in the development of PI-IBS. This must be taken into account when treating patients in this group. This article provides up-to-date information on the mechanisms of development of PI-IBS, including after a new coronavirus infection
Primary Esophageal Melanoma
Authors:   Tver Regional Clinical Oncological Dispensary, Sutyagin A.A. , Shchelochenkov S.V. , Guskova O.N. , Shchelochenkova T.D. , Bordin D.S. ,   Tver State Medical University,   A.S. Loginov Moscow Clinical Scientific Center,   A.I. Yevdokimov Moscow State University of Medicine and Dentistry
Published: December 2021

Primary esophageal melanoma is an extremely rare malignancy with an estimated prevalence of 0.0036 cases per million per year. The prognosis of the disease is unfavorable, in 30-40% of patients metastases are detected at the time of diagnosis, generally accepted approaches to treatment are currently insufficiently developed. The article presents the review of the literature and describes the clinical case of a patient with primary esophageal melanoma
Doctors' Awareness of Celiac Disease: Survey Results
Authors:   A.S. Loginov Moscow Clinical Scientific Center, Bykova S.V. , Sabelnikova E.A. , Zadiran E.I. , Parfenov A.I. ,   Scientific Research Institute of Healthcare and Medical Management of the Moscow City Health Department
Published: December 2021

The aim is to assess the awareness of general practitioners, gastroenterologists and other specialists on the methods of celiac disease diagnosis and treatment. Materials and methods. A single-stage continuous cross-sectional study of celiac disease awareness among general practitioners, gastroenterologists and other specialists was conducted. The level of doctors’ awareness was determined by the anonymous voluntary questionnaire using the questionnaire of 23 items developed on the basis of the Department of Non-Inflammatory Bowel Pathology (supplement). According to the answers to the questionnaire items, the knowledge of doctors in the field of diagnosis, therapy, and tactics of managing patients with celiac disease was evaluated. The study involved 197 doctors of medical organizations in Moscow and the Moscow Region. Statistical processing was performed with the use of Microsoft Excel 2016 software (Microsoft, USA) and the use of descriptive statistics methods. The data is presented in the form of absolute numbers and their fractions. Results. The survey revealed gaps in the doctors’ knowledge on the methods of celiac disease diagnosis and clinical manifestations,the definition of risk groups of patients to be examined to exclude celiac disease, the criteria for prescribing the gluten-free diet, as well as some social aspects. These studies indicate the lack of understanding of the methods of correct diagnosis and the need to improve the knowledge of doctors, the introduction of educational programs, schools for doctors and patients. Conclusion. It is necessary to improve the skills of doctors in celiac disease diagnosis and treatment in order to improve the screening and early diagnosis of celiac disease and related complications
Modern Concepts of Diagnosis and Prediction of Preterm Birth
Authors:   A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Takoyeva М.А. , Tsakhilova S.G. , Muradova V.S. , Yeremenko М.А. ,   Sklifosovsky Research Institute of Emergency Medicine
Published: December 2021

The article presents modern methods of diagnosing and predicting preterm birth in the practice of an obstetrician-gynecologist. Early prediction and diagnosis of preterm birth, based on the determination of placental alpha macroglobulin 1 in vaginal secretions, will make it possible to reduce the incidence of preterm birth, as well as reduce the number of unnecessary hospitalizations and unnecessary medical interventions.
NEED ANALYSIS OF ENGLISH TEXTBOOKS BASED ON THE ADDIE MODEL
Authors: Inayah Arin , Mulyati Tri
Published: December 2021

This research is research and development on the development of English textbooks for non-English department using ADDIE model, however this research only the first phase of ADDIE model, which is analysis. This research only describing the process and analyzing toward English textbooks need which is used in teaching and learning to non-English learners. This research uses descriptive qualitative research method, because the data analysis in the form of word. The researcher use three instrument to get the data, they are: questionnaire forgetting deep information of the student need, interview to know the teaching and learning process doing by the lecturer, and documentation to know the learners outcomes in learning English, especially English for general basic courses in the university. Based on research finding and discussion, students purpose in learning English are to be able to speak English in interest with their work, English level of the students are beginner, they understand simple sentence in daily conversation, students’ needs and wishes according with English learning are their English skill can support their academic competence and also their work, students need according with material and assignment is basic material for beginner learners with completed by the assignment, students need according with activities in the classroom is that they want to have active activity by solving the problem in pairs or small group. Based on the interview of the English lecture, the researcher concludes that the students are enthusiastic in the teaching and learning process, Learning method which is used is lecture method and cooperative learning, mastery of the material is still lacking,  the average of students skill is at the beginner level. The material which is should be mastered by students are focusing on reading and speaking, read the English literature and English article. Focus on answering the question by correct speaking. For the micro skills, they have to memorize many vocabularies and doing correct practicing in pronounces the word. Based on document analysis, the researcher concludes that: The students are able to translate the text related to their department, the students are able to explain the reading technique of the scientific text to know the information of the text, the students are able to improve speaking skill with correct sentences and other learning outcomes deal with the English lecture.
PRINCIPAL'S PERCEPTIONS OF STUDENTS' USE OF BORN BY PISA 2018
Authors: Safari Safari
Published: December 2021

The main objective of this study is to answer the following questions. Is there a relationship between the principal's perception of the use of liquor by students with sports teams, school drama / music groups, and band / choir groups based on PISA 2018. The research method used is quantitative method. The data in this study uses PISA 2018 data that has been released to the public and has been permitted to be used for research development purposes. The population of this study were principals in schools where 15-year-old students were studying in 2018, while the sample was principals in schools where 15-year-old students took PISA tests in 80 countries. The reason for choosing the sample was the principal in the school where the student was taking the 2018 PISA test. The data in this study were in the form of a questionnaire that was answered by principals in 80 countries, namely 20811 principals from 80 countries. Based on the results of the multiple regression analysis, the results show that there is a relationship between the principal's perception of the use of alcohol by students with sports teams, school drama / music groups, and band / choir groups based on PISA 2018 (P <0.000). The reliability of the instrument is 1.00 higher than the reliability of the person = 0.04. The conclusion is that statistically there is a relationship between the principal's perception of the use of alcohol by students with sports teams, school drama / music groups, and band / choir groups based on PISA 2018. These results indicate that the lower the use of alcohol and drugs in students at school, the more successful the school sports team, school drama/music group, and school band/choir group or vice versa.
RELATIONSHIP BETWEEN EMPOWERMENT AND MOTIVATION WITH TEACHER COMMITMENT
Authors: Ahmad Masduki
Published: December 2021

This study aims to determine whether or not there is a correlation between empowerment and motivation with teacher commitment at SDN Duren Sawit, East Jakarta. This study decides the three variables used, namely empowerment (X1), motivation (X2), and teacher commitment (Y). This study uses quantitative research using a survey method using a correlational approach. The subjects of this study were teachers from 8 public elementary schools located in the Duren Palm Village, East Jakarta, with a total population of 140 teachers. Sampling was carried out using Simple Random Sampling with the formula Slovin at a significance level of an error level of 5% so that it obtained 104 sample members. Carried out this research from January 2021 to July 2021. Testing the hypothesis was carried out using a multiple linear Unified regression model using a coefficient of determination (R Square) of 0.664 or 66.4%. From the results that have been carried out when testing the hypothesis, it is known that the results of this study have a relationship between empowerment and motivation with teacher commitment at SD Negeri Duren Sawit, East Jakarta.
Trends in development of Russian Far East’s fishing industry in context of strategic regional growth
Authors: Saltykov Maksim A. , Krasova Elena V.
Published: December 2021

This article is devoted to topical issues of the fishing industry development in the Russian Far East. Far East is the largest and the most abundant with fish resources region of Russia, and also it is the largest territorial administrative unit. The main scientific and practical task the research can help to solve is implementation of strategic prospects and scientific support of the industry development government programs. The aim of the research is to update the trends and identify the main problems of the fishing industry development in the Far East of Russia over the past decade. Methodologically the research is based on the concept of regional economy sustainable development. The article analyzes such indicators of the industry development as: number of enterprises in the industry, number of employees at the industry enterprises, volume of fish products production and processing, level of domestic prices for fish products, fish products consumption volume, fish products export value, volume of investments in fixed assets of industry enterprises. The key trends are identified and the most important problems of the regional fishing industry development are noted. Among such problems: the industry’s dependence on the world market situation, insufficient development of domestic market, excessive growth in prices for fish products in the domestic market, low degree of fish products processing, dependence of fish products export on Asian countries’ consumers.
Os vínculos entre a geografia brasileira e a geografia cubana: instituições, redes e círculos de afinidades
Authors: De Souza Haracenko Adélia Aparecida
Published: December 2021

This article presents part of the results of an investigation that aimed to understand the relationships and bonds established between Brazilian and Cuban geography. The research problem started from the assumption that geography, since the second half of the 19th century, served the interests of colonialist and imperialist countries, given that both Brazilian and Cuban geography were influenced by European theories. In this sense, we seek to identify interchange relations between the two of them, emphasizing the importance of geography between geographers in Latin America. The methodological procedures for collecting relevant information and data were sustained both in bibliographic references and in interviews with geographers from both countries. History and the oral source were essential in the search for primary information. In it we address the following subjects: the periods in which the bonds were established, the institutions that participated in the exchange, the networks and circles of affinities that were built through the ties established between the researchers. Considering that to integrate is to learn from both sides, it is to consolidate, this work joins the list of those who intend to contribute to the construction of a shared Latin American geography.
Caracterización paleográfica de la mano principal del Lybro de magyka (Ms. 5-2-32, Biblioteca Colombina, Sevilla)
Authors: Pereira de Oliveira Luíza , Teles Duchowny Aléxia
Published: December 2021

Este trabajo presenta un análisis paleográfico del texto copiado por la mano principal en el Lybro de magyka, una guía astrológica en español adquirida por Hernando Colón en 1527, en Sevilla. Conforme la Biblioteca Colombina, el texto está en gótica cursiva cortesana con la g humanística. Nuestro objetivo es presentar una descripción minuciosa de la escritura del documento y verificar esa información. Los resultados indican que de hecho el manuscrito manifiesta el multigrafismo mencionado por la Biblioteca. De este modo se ofrecen más informaciones acerca de la historia del manuscrito, cuya descripción es una etapa imprescindible para la introducción del texto en el corpus de las investigaciones acerca de la lengua española y de las lenguas románicas en general.
ELEMENTOS QUÍMICOS ESENCIALES EN LA TRUCHA ARCO IRIS, ONCORHYNCHUS MYKISS, EN SITIOS PRODUCTIVOS EN DOS PROVINCIAS DEL NOROESTE DEL LAGO TITICACA, PERÚ
Authors:   Instituto de Investigación de Ciencias Naturales - FCEDUC, Universidad Nacional del Altiplano de Puno, Av. Floral Nº 1153, Puno, Perú., Chui Betancur Heber N. , Belizario Quispe Germán ,   Escuela Profesional de Ingeniería Agrícola, Universidad Nacional del Altiplano de Puno, Av. Floral Nº 1153, Puno, Perú., Huaquisto Ramos Edilberto ,   Escuela Profesional de Ingeniería Agrícola, Universidad Nacional del Altiplano de Puno, Av. Floral Nº 1153, Puno, Perú., Sardon Ari Danitza Luisa ,   Instituto de Investigación de Ciencias Naturales - FCEDUC, Universidad Nacional del Altiplano de Puno, Av. Floral Nº 1153, Puno, Perú., Calatayud Mendoza Alfredo Pelayo ,   Centro de Investigación Fundo Carolina, Universidad Nacional del Altiplano (UNA) Puno, Perú., Huanca Bernardo Roque ,   Centro de Investigación Fundo Carolina, Universidad Nacional del Altiplano (UNA) Puno, Perú.
Published: December 2021

Se evaluó la concentración de elementos químicos esenciales del musculo axial de las truchas arcoíris (Oncorhynchus mykiss) colectadas en dos provincias: Puno y Huancané, ubicadas al noreste del lago Titicaca. Para la caracterización química se empleó el método de Espectrometría de Absorción Atómica (ICP-OES), bajo el protocolo 7003 EPA 200.7. Los elementos químicos esenciales que se encontraron en el musculo axial de las truchas colectadas en la provincia de Puno fueron: Zn (15,00±0,95 mg/kg); Se (1,26±0,37 mg/kg); Al (2,03±0,23 mg/kg); Ca (513,33±112,40 mg/kg); Na (1733,33±152,75 mg/kg); Mg (496,00±35,12 mg/kg); K (11333,33±1154,70 mg/kg); Mn (0,07±0,02 mg/kg) y P (5066,67±251,66 mg/kg), mientras que la concentración de elementos esenciales en las muestras del musculo axial de las truchas colectadas en la provincia de Huancané fueron: Zn (14,30±3,48 mg/kg); Se (1,27±0,34 mg/kg); Al (0,76±0,15 mg/kg); Ca (663,33±170,10 mg/kg); Na (1733,33±513,16 mg/kg); Mg (586,67±15,28 mg/kg); K (11000,00±0,00 mg/kg); Mn (0,16±0,06 mg/kg) y P (5300,00±264,58mg/kg) estos no superan los límites máximos permisibles, por lo que constituyen una fuente importante de proteínas, además de los dos ácidos grasos omega-3 esenciales conocidos como DHA (ácido docosahexaenoico) y EPA (ácido eicosapentaenoico) y vitaminas, por lo que las truchas arcoíris (Oncorhynchus mykiss) de las zonas evaluadas, fueron aptas para el consumo humano, debido a que no superan los límites máximos permisibles de los elementos químicos analizados.
Strangers at home: The Textual Construction of the Sherley Brothers
Authors: López-Peláez Casellas Jesús
Published: December 2021

During the first half of the seventeenth century various written accounts of the adventures of the three Sherley brothers – Thomas, Anthony and Robert – were published in England. These texts, in some cases written by the Sherleys themselves, often contributed to building an unproblematic and positive vision of the three brothers and their adventures in Persia, Turkey, and throughout Europe. However, an examination of the way in which all these texts (pamphlets, autobiographical writings, travel accounts, government documents, and private and official letters) interact with each other, together with the additional information provided by French and Spanish documents not accessible to an early modern audience in England, allows us to retrieve a Sherleyan narrative which, like the period in which it was produced, appears full of contradiction and new meanings.