bluuebunny/crossref_metadata_2025 huggingface dataset:
Making Sense from Experience: How a Sustainable Multi-Sensory Event Spurs Word-of-Mouth Recommendation of a Destination Brand
Authors: Gómez-Suárez Mónica , Yagüe María Jesús
Published: May 2021

The last decade has seen an exponential growth in published articles related to the influence of marketing events on destinations. However, there is still a need for empirical research about the effect that organized events built upon sensorial components have on different variables related to participants’ attitudes and behaviors, as such events have the ability to provide unique experiences and emotions. Therefore, this research focuses on the impact of a sustainable multi-sensory event marketing that promotes the interests of the organizing service company (a marina brand), alongside those of the host location, by associating the brand destination with this specific activity. By surveying attendees to a summer event aimed at enhancing visits to an area in Palma de Mallorca (Spain) and by adopting structural equation modeling estimation, the study shows that people’s positive valuations of the event had an impact on their word-of-mouth recommendation of the brand. Thus, visitors’ emotional experience was tied to their post-visit brand attitudes and brand equity. Based on the results, the study makes practical suggestions for branding in a sustainable destination, especially in relation to incorporating experiential elements in company-organized special events.
Coloring Invariant for Topological Circuits in Folded Linear Chains
Authors: Ceniceros Jose , Elhamdadi Mohamed , Mashaghi Alireza
Published: May 2021

Circuit topology is a mathematical approach that categorizes the arrangement of contacts within a folded linear chain, such as a protein molecule or the genome. Theses linear biomolecular chains often fold into complex 3D architectures with critical entanglements and local or global structural symmetries stabilised by formation of intrachain contacts. Here, we adapt and apply the algebraic structure of quandles to classify and distinguish chain topologies within the framework of circuit topology. We systematically study the basic circuit topology motifs and define quandle/bondle coloring for them. Next, we explore the implications of circuit topology operations that enable building complex topologies from basic motifs for the quandle coloring approach.
Taming Tail Risk: Regularized Multiple β Worst-Case CVaR Portfolio
Authors: Nakagawa Kei , Ito Katsuya
Published: May 2021

The importance of proper tail risk management is a crucial component of the investment process and conditional Value at Risk (CVaR) is often used as a tail risk measure. CVaR is the asymmetric risk measure that controls and manages the downside risk of a portfolio while symmetric risk measures such as variance consider both upside and downside risk. In fact, minimum CVaR portfolio is a promising alternative to traditional mean-variance optimization. However, there are three major challenges in the minimum CVaR portfolio. Firstly, when using CVaR as a risk measure, we need to determine the distribution of asset returns, but it is difficult to actually grasp the distribution; therefore, we need to invest in a situation where the distribution is uncertain. Secondly, the minimum CVaR portfolio is formulated with a single β and may output significantly different portfolios depending on the β. Finally, most portfolio allocation strategies do not account for transaction costs incurred by each rebalancing of the portfolio. In order to improve these challenges, we propose a Regularized Multiple β Worst-case CVaR (RM-WCVaR) portfolio. The characteristics of this portfolio are as follows: it makes CVaR robust with worst-case CVaR which is still an asymmetric risk measure, it is stable among multiple β, and against changes in weights over time. We perform experiments on well-known benchmarks to evaluate the proposed portfolio.RM-WCVaR demonstrates superior performance of having both higher risk-adjusted returns and lower maximum drawdown.
Training Service Staff to Enhance Non-Verbal Behavioral Skills to Increase Customer Profitability in Tourism
Authors: Tusell-Rey Claudia C. , Rey-Benguría Carmen F. , Tejeida-Padilla Ricardo , Villuendas-Rey Yenny
Published: May 2021

To address the personalization of customer service in four-star hotels in Cuba, this research takes up the precepts of non-verbal communication and Customer Relationship Management. The Systemic Method and its treatment through the Soft Systems Methodology are applied. With information obtained from the Sol Cayo Guillermo hotel, belonging to the Jardines del Rey tourist center, in Cuba, a grouping of the essential elements in customer satisfaction generated with the use of Computational Intelligence algorithms was used. In the end, we introduce a training program for the personalization of customer service based on the non-verbal communication system to enhance service in four-star hotels in Cuba. As a main result, the experts agree that the proposed training program will have a positive impact on the worker–client communication relationship to increase customer profitability in four-star hotels in Cuba.
Contamination by Aflatoxins B/G in Food and Commodities Imported in Southern Italy from 2017 to 2020: A Risk-Based Evaluation
Authors: Gallo Pasquale , Imbimbo Samantha , Alvino Silvana , Castellano Vincenzo , Arace Olga , Soprano Vittorio , Esposito Mauro , Serpe Francesco Paolo , Sansone Donato
Published: May 2021

This study reports the results of aflatoxins B/G monitoring in food of vegetal origin, imported in Southern Italy from extra-European Union countries. From 2017 to 2020, we analyzed 1675 samples using an accredited HPLC method with fluorescence detection. We found out 295 samples (17.6%) were contaminated by aflatoxin B1, 204 by aflatoxins B/G (12.2%), while 75 (4.5%) resulted non-compliant to maximum limits set by the European Union law. Most of the batches tested were unprocessed food; the distribution of contamination levels, incidence of non-compliant samples, inference for different kinds of food are reported. The study focuses on the food more susceptible to contamination by aflatoxins; nuts are the food more controlled, showing the higher number of non-compliant samples. Our study confirms that pistachio nuts, hazelnuts and almonds are the major sources of exposure for consumers. Still, other products, such as chili pepper and Brazil nuts, need to get more information about their contamination levels. The study’s findings are discussed in the perspective of the last opinion by EFSA about chronic exposure to aflatoxins. A case study to evaluate not compliance of a composed food to the European Union law is reported.
The 35-Day Cycle of Hercules X-1 in Multiple Energy Bands from MAXI and Swift/BAT Monitoring
Authors: Leahy Denis , Wang Yuyang
Published: May 2021

Hercules X-1 (Her X-1) has been monitored by MAXI and by Swift/BAT for over a decade. Those observations are analyzed to measure the shape and energy dependence of the long-term average of the 35-day cycle of Her X-1. The cross-correlation (CC) method is used to determine peak times and cycle lengths. Swift/BAT data produces better 35-day times because of the gaps in the MAXI data. Using Swift/BAT-derived times, average 35-day cycle light-curves are created for multiple energy bands: MAXI’s 2–20 keV, 2–4 keV, 4–10 keV and 10–20 keV bands and Swift/BAT’s 15–50 keV band. The durations of the different states of the 35-day cycle are measured better than previously. We find clear changes in X-ray softness ratio with 35-day phase, and detect persistent features in the 35-day cycle. These include column density changes during turn-on of Main High and of Short High states, and persistent absorption dips during the bright part of Main High and of Short High states.
BHK-21 Cell Clones Differ in Chikungunya Virus Infection and MXRA8 Receptor Expression
Authors: Yin Peiqi , Kielian Margaret
Published: May 2021

Baby hamster kidney-21 (BHK-21) cells are widely used to propagate and study many animal viruses using infection and transfection techniques. Among various BHK-21 cell clones, the fibroblast-like BHK-21/C-13 line and the epithelial-like BHK-21/WI-2 line are commonly used cell clones for alphavirus research. Here we report that BHK-21/WI-2 cells were significantly less susceptible to primary infection by the alphavirus chikungunya virus (CHIKV) than were BHK-21/C-13 cells. The electroporation efficiency of alphavirus RNA into BHK-21/WI-2 was also lower than that of BHK-21/C-13. The growth of CHIKV was decreased in BHK-21/WI-2 compared to BHK-21/C-13, while primary infection and growth of the alphavirus Sindbis virus (SINV) were equivalent in the two cell lines. Our results suggested that CHIKV entry could be compromised in BHK-21/WI-2. Indeed, we found that the mRNA level of the CHIKV receptor MXRA8 in BHK-21/WI-2 cells was much lower than that in BHK-21/C-13 cells, and exogenous expression of either human MXRA8 or hamster MXRA8 rescued CHIKV infection. Our results affirm the importance of the MXRA8 receptor for CHIKV infection, and document differences in its expression in two clonal cell lines derived from the original BHK-21 cell cultures. Our results also indicate that CHIKV propagation and entry studies in BHK-21 cells will be significantly more efficient in BHK-21/C-13 than in BHK-21/WI-2 cells.
Human Immunodeficiency Viruses Pseudotyped with SARS-CoV-2 Spike Proteins Infect a Broad Spectrum of Human Cell Lines through Multiple Entry Mechanisms
Authors: Xu Chuan , Wang Annie , Geng Ke , Honnen William , Wang Xuening , Bruiners Natalie , Singh Sukhwinder , Ferrara Fortunato , D’Angelo Sara , Bradbury Andrew R. M. , Gennaro Maria Laura , Liu Dongfang , Pinter Abraham , Chang Theresa L.
Published: May 2021

Severe acute respiratory syndrome-related coronavirus (SARS-CoV-2), the causative agent of coronavirus disease 19 (COVID-19), enters cells through attachment to the human angiotensin converting enzyme 2 (hACE2) via the receptor-binding domain (RBD) in the surface/spike (S) protein. Several pseudotyped viruses expressing SARS-CoV-2 S proteins are available, but many of these can only infect hACE2-overexpressing cell lines. Here, we report the use of a simple, two-plasmid, pseudotyped virus system comprising a SARS-CoV-2 spike-expressing plasmid and an HIV vector with or without vpr to investigate the SARS-CoV-2 entry event in various cell lines. When an HIV vector without vpr was used, pseudotyped SARS-CoV-2 viruses produced in the presence of fetal bovine serum (FBS) were able to infect only engineered hACE2-overexpressing cell lines, whereas viruses produced under serum-free conditions were able to infect a broader range of cells, including cells without hACE2 overexpression. When an HIV vector containing vpr was used, pseudotyped viruses were able to infect a broad spectrum of cell types regardless of whether viruses were produced in the presence or absence of FBS. Infection sensitivities of various cell types did not correlate with mRNA abundance of hACE2, TMPRSS2, or TMPRSS4. Pseudotyped SARS-CoV-2 viruses and replication-competent SARS-CoV-2 virus were equally sensitive to neutralization by an anti-spike RBD antibody in cells with high abundance of hACE2. However, the anti-spike RBD antibody did not block pseudotyped viral entry into cell lines with low abundance of hACE2. We further found that CD147 was involved in viral entry in A549 cells with low abundance of hACE2. Thus, our assay is useful for drug and antibody screening as well as for investigating cellular receptors, including hACE2, CD147, and tyrosine-protein kinase receptor UFO (AXL), for the SARS-CoV-2 entry event in various cell lines.
Metaviromes Reveal the Dynamics of Pseudomonas Host-Specific Phages Cultured and Uncultured by Plaque Assay
Authors: Alanin Katrine Wacenius Skov , Junco Laura Milena Forero , Jørgensen Jacob Bruun , Nielsen Tue Kjærgaard , Rasmussen Morten Arendt , Kot Witold , Hansen Lars Hestbjerg
Published: May 2021

Isolating single phages using plaque assays is a laborious and time-consuming process. Whether single isolated phages are the most lyse-effective, the most abundant in viromes, or those with the highest ability to make plaques in solid media is not well known. With the increasing accessibility of high-throughput sequencing, metaviromics is often used to describe viruses in environmental samples. By extracting and sequencing metaviromes from organic waste with and without exposure to a host-of-interest, we show a host-related phage community’s shift, as well as identify the most enriched phages. Moreover, we isolated plaque-forming single phages using the same virome–host matrix to observe how enrichments in liquid media correspond to the metaviromic data. In this study, we observed a significant shift (p = 0.015) of the 47 identified putative Pseudomonas phages with a minimum twofold change above zero in read abundance when adding a Pseudomonas syringae DC3000 host. Surprisingly, it appears that only two out of five plaque-forming phages from the same organic waste sample, targeting the Pseudomonas strain, were highly abundant in the metavirome, while the other three were almost absent despite host exposure. Lastly, our sequencing results highlight how long reads from Oxford Nanopore elevates the assembly quality of metaviromes, compared to short reads alone.
Anti-SARS-CoV-2 Activity of Surgical Masks Infused with Quaternary Ammonium Salts
Authors: Selwyn Gary S. , Ye Chunyan , Bradfute Steven B.
Published: May 2021

The SARS-CoV-2 pandemic has highlighted the need for protective and effective personal protective equipment (PPE). Research has shown that SARS-CoV-2 can survive on personal protective equipment, such as commonly used surgical masks. Methods are needed to inactivate virus on contaminated material. We show here that embedding viral-disinfecting compounds during the manufacturing of surgical masks inactivates a high dose (up to 1 × 105 pfu) of live, authentic SARS-CoV-2 within minutes.
Promotion of the Development of Sentinel Species in the Water Column: Example Using Body Size and Fecundity of the Egg-Bearing Calanoid Copepod Eurytemora affinis
Authors: Souissi Sami , Souissi Anissa
Published: May 2021

The development of sentinel species in aquatic ecosystems is mostly based on benthic organisms; however, organisms living in water column such as zooplankton have received less attention, except for some cladocerans. In this paper, a new ecological indicator based on simple measurements of the size and fecundity of egg-bearing calanoid copepods is developed. The well-studied estuarine copepod Eurytemora affinis is used to illustrate this new framework. A large database obtained from laboratory experiments developed under different conditions is used to define a reference regression line between clutch size (CS) and prosome length (PL). The same database allowed one to confirm that the coefficient of variation (CV) of CS is an adequate estimator of the accumulated stress at population level. The CV of PL shows very little variability in all experimental and field conditions. The values of CS and PL obtained from the Seine, Loire, Gironde, Scheldt and Elbe estuaries in Europe are compared to the reference regression line. A quality index (QI) is calculated as a percentage of difference between the observed and the predicted CS. The QI classified 19 samples collected in the Seine estuary between 2004 and 2010 into four classes according to the physiological condition of the copepod female. A single sampling from June 2004 (5.26%) showed a very good condition, whereas 57.9% of the sampling dates confirmed good conditions. On the other hand, four sampling dates were associated to very bad conditions and three sampling dates indicated bad conditions. Seven additional samples obtained from other European estuaries between 2006 and 2009 were also used. Females showing poor conditions were observed in the early spring of 2005 and 2008 as well as during the month of November. These years were characterized by very strong climatic anomalies with a very cold late winter in 2005 and a warm winter in 2008. Therefore, it seems that the QI perfectly reflected the strong stress caused by the sudden change in hydro-climatic conditions that have certainly affected the physiology of copepod females and probably the availability of food. The new indicator is very simple to calculate and can be generalised to several aquatic ecosystems (fresh water and brackish water) by targeting the dominating egg-bearing calanoid copepods. As in the case of E. affinis, the development of sentinel species based on copepods or cladocerans can enrich ecological and ecotoxicological studies given their capacity to integrate the variability of their habitats’ quality at the individual and population levels.
Analysis of Drought Characteristics in Northern Shaanxi Based on Copula Function
Authors: Wang Junhui , Rong Guangzhi , Li Kaiwei , Zhang Jiquan
Published: May 2021

Precipitation is low and drought occurs frequently in Northern Shaanxi. To study the characteristics and occurrence and development of drought events in Northern Shaanxi is beneficial to the prevention and control of drought disasters. Based on the monthly rainfall data of 10 meteorological stations in Northern Shaanxi from 1960 to 2019, the characteristic variables of drought events at each meteorological station in Northern Shaanxi were extracted by using run theory and copula function. The joint probability distribution and recurrence period were obtained by combining the duration and intensity of drought, and the relationship between drought characteristics and crop drought affected area was studied. The results show that (1) from 1960 to 2019, drought events mainly occurred in Northern Shaanxi with long duration and low severity, short duration and high severity, or short duration and low severity, among which the frequency of drought events that occurred in Yuyang and Baota districts was higher. The frequency of light drought and extreme drought was more in the south and less in the north, while the frequency of moderate drought and severe drought was more in the north and less in the south. (2) The optimal edge distribution of drought intensity and drought duration in Northern Shaanxi is generalized Pareto distribution, and the optimal fitting function is Frank copula function. The greater the duration and intensity of drought, the greater the cumulative probability and return period. (3) The actual recurrence interval and the theoretical recurrence interval of drought events in Northern Shaanxi were close, and the error was only 0.1–0.3a. The results of the joint return period can accurately reflect the actual situation, and this study can provide effective guidance for the prevention and management of agricultural dryland in Northern Shaanxi.
Allotments in the Future: Building Resilience to Climate Change through Improved Site Design and Efficient Water Practices
Authors: Ayling Sarah M. , Phillips Neil , Bunney Sarah
Published: May 2021

In recent years, there has been a resurgence in the popularity of allotments and home- grown food in the UK. This interest is likely to increase as people become more aware of the health benefits of spending time outdoors. Climate projections for the UK indicate that over the next 20 years, winters will become warmer and wetter, and the summers hotter and drier. Most UK allotments and community gardens are a collection of individual plots whose holders are free to manage them as they wish, within site rules. The efficacy of individual efforts to collect and store rainwater is often limited as most allotment sites were laid out when water practices were a secondary consideration. Our research, which included visiting allotment sites and reviewing growing practices, suggests that grouping plots and sharing water facilities could enable plot holders to store sufficient water to meet anticipated demand for thirty rain-free days in midsummer. This combined with growing practices that improve soil moisture capacity and water use efficiency will provide effective mitigation against climate change.
Lake Users’ Perceptions of Environmental Change: Ecosystem Services and Disservices Associated with Aquatic Plants
Authors: Wood Louisa E. , Andriamahefazafy Mialy Z. , Guilder James , Kull Christian A. , Shackleton Ross T.
Published: May 2021

Lake Léman (Lake Geneva), Switzerland, is known to have undergone major environmental change over the last few decades, including changes in the abundance, distribution, and species composition of macrophytic plants (aquatic plants). In this study, questionnaires and key informant interviews were used to assess lake users’ perceptions of broad scale environmental change in the lake paying special attention tochanges in the abundance of aquatic plants and the perceived ecosystem services (ES) and ecosystem disservices (EDS) associated with them. In addition, we assessed whether users’ perceptions of aquatic plants had an impact on perceived management need. Most respondents (63%) perceived aquatic plant abundance to have increased over the last 10 years, primarily because of climate change. Aquatic plants were seen to benefit water quality through improved regulation and supporting services, and to provide important habitat and food for fauna. Most EDS associated with increased aquatic plant abundance were categorized as cultural or economic. User perceptions of the ES and EDS associated with aquatic plants affected support for management (60% of respondents supported some form of management), and such information is important for informing environmental decision making.
Mobile Genetic Elements Drive the Antibiotic Resistome Alteration in Freshwater Shrimp Aquaculture
Authors: Fang Hao , Ye Nan , Huang Kailong , Yu Junnan , Zhang Shuai
Published: May 2021

Shrimp aquaculture environments are a natural reservoir of multiple antibiotic resistance genes (ARGs) due to the overuse of antibiotics. Nowadays, the prevalence of these kinds of emerging contaminants in shrimp aquaculture environments is still unclear. In this study, high-throughput sequencing techniques were used to analyze the distribution of ARGs and mobile genetic elements (MGEs), bacterial communities, and their correlations in water and sediment samples in two types of typical shrimp (Procambarus clarkii and Macrobrachium rosenbergii) freshwater aquaculture environments. A total of 318 ARG subtypes within 19 ARG types were detected in all the samples. The biodiversity and relative abundance of ARGs in sediment samples showed much higher levels compared to water samples from all ponds in the study area. Bacitracin (17.44–82.82%) and multidrug (8.57–49.70%) were dominant ARG types in P. clarkii ponds, while sulfonamide (26.33–39.59%) and bacitracin (12.75–37.11%) were dominant ARG types in M. rosenbergii ponds. Network analysis underlined the complex co-occurrence patterns between bacterial communities and ARGs. Proteobacteria, Cyanobacteria, and Actinobacteria exhibited a high abundance in all samples, in which C39 (OTU25355) and Hydrogenophaga (OTU162961) played important roles in the dissemination of and variation in ARGs based on their strong connections between ARGs and bacterial communities. Furthermore, pathogens (e.g., Aeromonadaceae (OTU195200) and Microbacteriaceae (OTU16033)), which were potential hosts for various ARGs, may accelerate the propagation of ARGs and be harmful to human health via horizontal gene transfer mediated by MGEs. Variation partitioning analysis further confirmed that MGEs were the most crucial contributor (74.76%) driving the resistome alteration. This study may help us to understand the non-ignorable correlations among ARGs, bacterial diversity, and MGEs in the shrimp freshwater aquaculture environments.
Characteristics and Experiences of Ride-Hailing Drivers with Electric Vehicles
Authors: Sanguinetti Angela , Kurani Kenneth
Published: May 2021

Electrification of transportation network companies (TNCs), such as Uber and Lyft, can produce social and environmental benefits from reduced vehicle emissions and enhanced implementation of renewable electricity as well as private benefits to drivers via reduced vehicle fuel and maintenance costs compared to conventional vehicles. We conducted a survey of plug-in electric vehicle (PEV) drivers on the Uber platform in the US. This paper describes these drivers and their experiences to further understanding of motivations for and barriers to PEV adoption among TNC drivers. The TNC-PEV drivers in this sample clearly recognized, and were largely motivated by, economic benefits of fuel and maintenance savings, thus, increased net earnings, associated with using a PEV to provide ride-hailing services rather than a conventional internal combustion engine vehicle. Most drivers reported charging their PEV every day, most often at home and overnight. This is true even of those with plug-in hybrid electric vehicles (PHEVs) that can run on gas if not charged. Increased electric driving range topped the list of drivers’ wishes to better support PEVs on TNCs, and range limitations topped the list of reasons why PHEV drivers did not opt for a battery electric vehicle (BEV; that runs exclusively on electricity). The second most common wish among all PEV drivers was for more charger locations.
Application of stereotactic radiosurgery and radiotherapy in the treatment of Itsenko — Cushing’s disease
Authors: Abdali А. , Astafieva L. I. , Trunin Yu. Yu. , Golanov A. V. , Kalinin P. L. , Abdali Badshahzar , Сhmutin G. E. , Sherzad Gul Sharif
Published: May 2021

Cushing’s disease is caused by a pituitary tumor which causes increased production of adrenocorticotropic hormone, leading to chronic hypersecretion of cortisol by the adrenal cortices. Endoscopic transnasal adenomectomy is the initial treatment of choice with the greatest efficiency for the treatment of the disease. However in the absence of remission or relapse of hypercortisolism after neurosurgical surgery, as well as in cases when surgical intervention cannot be carried due to medical contraindications to surgical intervention, radiation treatment is used as an alternative or adjoining therapy. In this literature review the efficiency of different radiation techniques (the conventional and the modern techniques), as well as possible complications of modern methods of radiosurgery and radiotherapy have been looked for.
Early diagnosis of spondyloarthritis and gonarthritis with the magnetic resonance imaging
Authors: Kantyukova Gulnara Abdulkhakovna , Valieva Nataliya Ivanovna , Kutuzov Igor Aleksandrovich , Bogachev Artem Andreevich , Novikov Yuriy Olegovich
Published: May 2021

Introduction. Musculoskeletal pain (MSP) — has now assumed the character of a non-infectious epidemic and ranks second among the causes of disability, leading to a significant loss of productivity among the working-age population in all industrialized countries. Spondyloarthrosis of the lumbar region and gonarthrosis are the main diseases that doctors face at outpatient appointments. The pathogenesis of the disease develops according to one scenario, accompanied by aseptic inflammation, involvement of the muscular and ligamentous apparatus in the process, leading to the formation of dissimilar locomotor disorders, antinociceptive insufficiency, peripheral and central sensitization. Presents the results of magnetic resonance imaging (MRI), which can be used for early diagnosis of MSD, as well as dynamic control during treatment. Aim — to assess of neuroimaging signs in patients with spondyloarthrosis and gonarthrosis, depending on the genesis of the disease. Methods. An analytical single-stage study was performed with 123 patients with an established clinical diagnosis of MSP, who were divided into four groups: primary gonarthrosis (36 people), post-traumatic (38 people), spondylogenic (30 people) and x-ray negative (19 people). To study neuroimaging signs, MRI was performed on the devices «OPENMARK 4000» 0.42 T of the company «ANKE», «OPART» 0.35 T of the company «TOSHIBA» and «Superstar» 0.35 T of the company «Neusoft medikal systems» in transversal, sagittal and coronary projections, in T1W, T2W and STIR modes with adipose tissue suppression. Results. During MRI examination, 47.2 % of patients revealed spondyloarthrosis of the III grade, 30,1 % — II grade. 33,3 % had damage in the form of fragmentation of the internal and external meniscus of the knee joint, 30.1 % of cases revealed damage to the internal meniscus in the form of longitudinal splitting and the same number of osteophytes. The most common cases were intervertebral disc sequestration (2,4 %) and expansion of the articular gap of the knee joint (4,1 %), and spondyloarthritis of the I grade (7,3 %). When compared in groups, more pronounced neuroimaging signs were detected in posttraumatic and primary gonarthrosis, and they were significantly lower in spondylogenic genesis. When examining the spine, no differences were found in the groups. Conclusion. The study showed high information content of MRI in CA and GA, which allows for early diagnosis of the disease and differential diagnosis.
Factores del riesgo en la cartera de microcréditos de los bancos universales
Authors: Ocando Marlin
Published: May 2021

Uno de los grandes componentes de la economía es el crédito, herramienta financiera que puede ser utilizada para realizar inversiones o cubrir necesidades. Desde esta perspectiva el presente artículo busco determinar los factores del riesgo en la cartera de microcréditos de los bancos universales. La metodología fue de tipo descriptiva, con un diseño de campo, no experimental, transeccional. La población quedó conformada por (8) ochos bancos universales del municipio Cabimas. Para la recolección de datos se empleó la encuesta mediante un cuestionario con escala de frecuencias. La validez se realizó a través del juicio de expertos, y su confiabilidad fue de 0,92 calculada por el Coeficiente Alfa de Cronbach. El análisis de los datos se realizó con estadística descriptiva, basada en la media aritmética. Se determinaron como factores que le otorgan fortalezas a los bancos analizados la estructura organizacional, el riesgo legal, la economía y la actividad económica del cliente.
Farklı Gökkuşağı Alabalığı (Oncorhynchus mykiss) Kuluçkahanelerindeki Damızlık Populasyonlarının Bazı Fenotipik Özellikleri ve Farklı Damızlıklardan Örneklenen Yumurtaların Aynı Çevresel Şartlarda Kalite Kriterleri
Authors: KARATAŞ Boran , ARABACI Muhammed
Published: May 2021

Bu çalışmada Van ilindeki altı adet gökkuşağı alabalığı kuluçkahanesinde bulunan anaç populasyonlarının yumurta ve yumurtlamayla ilgili bazı fenotipik özellikleri ile örneklenen yumurtaların aynı çevresel şartlarda kuluçkalanmasıyla yumurta ve larva kalite kriterlerinin belirlenmesi amaçlanmıştır. Bu amaçla kuluçkahanelerde bazı su kalite kriterleri, anaçlarla ilgili kuluçkahane yönetim parametreleri, anaçların yumurta ve yumurtlama ile ilgili fenotipik özellikleri ve farklı kuluçkahanelerden örneklenen yumurtaların aynı çevresel şartlarda (10.1±0.14 °C) kuluçkalanarak yumurta ve larva kalite kriterleri belirlenmiştir.
Su kalite kriterlerinin literatürde verilen aralıklarla uyumlu olduğu ve anaç refahını olumsuz etkileyecek düzeyde olmadığı görülmüştür. Kuluçkahanelerdeki toplam anaç sayısı, yaşı, boyu ağırlığı ile toplam ve nispi fekonditeleri her bir kuluçkahane için farklı olup bakım ve beslemelerinde de farklılıklar görülmüştür. Anaçların yumurtlama aralığı ve yumurtlama profili de her bir kuluçkahane için farklı olup kuluçkahanelerden birinde Kasım başında yumurtlayan anaçlar gözlenmiştir. Aynı çevresel şartlar altında yapılan deneme düzeneğinde ise yumurtaların gözlenme oranı ve larva çıkış oranı istatistiksel olarak farklı ve önemli bulunmuştur(P<0.05).
Sonuç olarak tüm parametreler incelendiğinde kuluçkahaneler arasında fenotipik farklılıklar olduğu görülmüştür. Bu durumun nedeni kuluçkahanelerdeki su kalitesi ve anaç yönetim parametrelerinin farklı olması olabilir. Ancak bu farklılıkların nedeni kuluçkahanelerin bünyelerinde farklı anaç hatları bulundurmaları ve anaçlar arasında olan genotipik farklılıklar da olabilir. Bu nedenle genotipik farklılıklarla ile ilgili detaylı çalışmalara ihtiyaç vardır. Yetiştiricilik açısından ise kuluçkahanelerden sadece birisinde bulunan ve erken yumurtlayan anaçlardan, erken yumurtlayan hat elde etmek mümkündür. Daha ekonomik bir yetiştiricilik için anaçlarda yumurta sayısını ve kalitesini arttırmaya yönelik besleme yöntemleri uygulanmalıdır. Ayrıca anaç populasyonlarında homozigotluğu düşürmek için dişi erkek anaç oranı kuluçkahanelerde eşitlenmeli ve erkek anaç ihtiyacı porsiyonluk balıklardan karşılanmamalıdır.
Evaluación de la regresión logística como clasificador de espectros Raman en el diagnóstico automático de cáncer de mama
Authors: De La Parra-González Israel , Luna-Rosas Francisco Javier , Rodríguez-Martínez Laura Cecilia , Frausto-Reyes Claudio
Published: May 2021

We evaluated logistic regression as a classifier in the diagnosis of breast cancer based on Raman spectra. Common studies published in the subject use dimensional reduction techniques to generate the classifier. Instead, we proposed to observe the effect of using all intensity values recorded in the spectra as input variables to the algorithm. We used leaving one out cross-validation measuring classification accuracy, sensitivity and specificity. We used Raman spectra taken from breast tissue previously diagnosed by histopathological analysis, some from healthy tissue and some from tissue with cancer. Each spectrum is formed by 605 intensity values in the range of 687 to 1781 cm-1. Logistic regression classifier exhibited 100% classification accuracy. To establish comparative references, we evaluated in the same way: 1) a logistic model preceded by dimensional reduction with Principal Component Analysis (PCA+LR), 2) two classifiers obtained with weighted K nearest neighbors algorithm, and 3) a classifier using the naive Bayes (NB) algorithm. We found that PCA+LR and NB showed the same performance of 100% in classification accuracy. Nevertheless, PCA+LR requires more processing computational time.
Diseño de interfaz gráfica para analizar el ciclo de marcha del cuerpo humano en software libre
Authors: Carrillo-Hernández Didia , Terrones-Lara Yered Uriel , García-Cervantes Heraclio , Blanco-Miranda Alan David
Published: May 2021

Currently in the country there are more than 27 thousand cases of annual amputations and more than 80% correspond to lower limbs, therefore, the demand for prosthetic equipment is greater than what the health sector institutions can provide. It should be noted that the equipment developed by these institutions is only passive equipment, so that only 10% of patients who receive a prosthetic equipment successfully complete their rehabilitation. The main problems that the patient faces when adapting to their prosthetic equipment is the response time and alignment vs the healthy limb, since it does not have an intelligent control system that allows them to respond in real time as the losted limb did. This causes gaps when performing your gait cycle, this over time can bring about abnormalities in your posture affecting the alignment of your motor system. This work allows us to analyze the range of motion of the ankles and knees, in addition to determining the angular velocity of both, it is essential information for the development of control systems necessary for active prosthetic equipment. The programming language where it was developed is the Python 3.7 software and additionally reproduce the simulation of the gait cycle.
Estado emocional de las personas ante situaciones de pandemia a través del tiempo
Authors: Amaro-Del Real Oscar , Cejas-Leyva / O Luz María , Lazcano-Franco Maura Antonia , García-Medina Mario Gilberto
Published: May 2021

Objective: to publicize the emotional state of people in pandemic situations over time, through a compilation of readings carried out with the purpose of elaborating a semblance of the emotional conditions experienced throughout history, during the different pandemic outbreaks that have emerged, such as COVID-19. Methodology: the methodology used in this research process is based on the qualitative paradigm, because it sought to understand and elucidate what has emerged to date on the emotional state of people, due to the different pandemics experienced through over time such as that caused by COVID 19; through the systematization, organization and categorization of the information selected for presentation, both in the theoretical framework and in the results and conclusions of this article. To achieve the above, an inductive analysis procedure of the theory was followed, which played the role of guiding instrument by investigating the interaction of the subjects with the various diseases that have spread throughout the world through time. Contribution: a recapitulation of the emotional state of people in pandemic situations is presented, providing the reader with an overview of the emotional consequences that have been experienced in these situations at different times in history, such as the one currently being experienced in the face of COVID-19.
La música de salón en el Zacatecas decimonónico
Authors: Sánchez-Usón / María José , Juan-Carvajal Mara Lioba , Vdovina María
Published: May 2021

In Mexico, in the first half of the 19th century, the aspiration to create a different music, independent of the one that had been cultivated in previous centuries, still fails to propose or implement a new musical aesthetic that erases the traces of the European, but rather, stagnates in a parenthesis with hardly any original creations of its own, composers and performers import foreign works or take inspiration from existing styles and works, resulting in easy, superficial scores, in demand for the consumption of a bourgeois public that will impose a trivial taste, destined only to the learning of an instrument or to simple social entertainment, as can be seen in the compositions of the so-called "salon music". It wasn't until the last decades of the 19th century that a Mexican musical idiosyncrasy emerged, expressed in the work, of greater quality and merit, of outstanding national masters. In this process, Zacatecas was not left out.
Siendo líder con inteligencias tecnológicas
Authors: Sánchez-Rivera Lilia , Espericueta-Medina Marta Nieves , Muñoz-Lopez Temístocles , Delgado-Estrada Sandra
Published: May 2021

The article exposes important aspects of the usage of technologies of information and communication related to multiple intelligences and organizational leadership.The objective of this article was to explore the TIC’s dimensions, multiple intelligences, and organizational leadership. The methodology used quantitative, transversal descriptive and correlational. The compilation of the information was through a questionary that measured the three dimensions mentioned. The sample was confirmed by 315 students, the sampling used was no probabilistic, through the strategy of convenience sampling. The statistics techniques that were used were descriptive statistic, correlational and factorial. The contribution of the study lies in the statistic empiric evidence that allows to confirm that use of the TIC benefit to the multiple intelligences and to the organizational leadership. It is denoted that the positive correlation with variables of the use of the TIC in relation with the multiple intelligences linguistic-verbal, logical-mathematical, space, interpersonal and with the organizational leadership, it can be said that the TIC integrated with multiple intelligences and the use of organizational leadership propitiate to be a leader with technological intelligence.
Análisis de la trayectoria académica del programa educativo de Ingeniería en Electrónica de la Facultad de Ciencias Químicas e Ingeniería
Authors: Reyes-Martínez Roberto Alejandro , Trujillo-Toledo Diego Armando , Esqueda-Elizondo José Jaime , Miranda-Pascual María Elena
Published: May 2021

Higher Education Institutions implement study programs with the aim of training competitive professionals that adjust to the needs of the labor market, but seeking as far as possible to guarantee a successful graduation. It is necessary to identify the characteristics of graduation of a program education that allows institutional managers to propose strategies that improve graduation levels in them and thereby improve the quality conditions offered to students enrolled in these study programs. In order to carry out this process, the failure rate, the conditions of the school environment, the results of the bachelor's exit exams and the accreditations of the educational program are analyzed from the beginning. This is done in order to identify key factors in the dropout process and where to work for the improvement of the Electronic Engineering educational program of the Faculty of Chemical Sciences and Engineering of the Autonomous University of Baja California.
La motivación en la música como eje de la formación profesional
Authors: Juan-Carvajal Mara Lioba , Juan-Carvajal Dargen Tania , Vdovina María
Published: May 2021

In some countries, music teaching is present in the study plans since an early age for kids. This provides the schoolchildren with general culture and, in certain cases, encourages them to continue their musical studies at higher levels of education. The decision to major as a musician, though, implies a great sacrifice for a teen who, in ideal terms, would start from a young age and would have family support, but towards adolescence, requires various motivational strategies that encourage him to finish his studies at a bachelor's level. The career choice related to music education is diverse in most of the Mexican states; however, in many cases, music is not the main focus of the education plans. These considerations led to this reflection, which aims to recapitulate and examine the aspects that motivate students to train as professional musicians.
Estudio exploratorio de los nativos digitales en el ámbito Universitario de la Región Mixteca
Authors: Allende-Hernández Olivia , Reyes-Espinoza Celia Bertha , Sánchez-Platas Liliana Eneida
Published: May 2021

First year university students need to make efficient use of technological tools, but there is a lack of accessibility of these tools to students from rural communities. This is a problem as one of the sustainable development goals is guaranteeing quality education that is both inclusive and equitable for all students. In the case of rural areas, students cannot be considered “Digital Natives” just because they have grown up in the digital age, because they have not had the exposure to technological tools that their urban counterparts have had. Based on the case study methodology and in consideration of the foregoing premises, this article has applied a strategy to investigate the level of technological competence of the so-called Digital Natives entering the Technological University of the Mixteca (UTM). The study identified that first-year UTM students do not consider themselves to be Digital Natives and acknowledge having deficiencies in their knowledge in the use of technological tools. Additionally, incoming students face academic requirements and expectations for which most are not prepared. Despite the deficiencies, students show a disposition and ability to learn to use technological tools that allow them to achieve meaningful learning.
Avaliação da experiência de estudantes de Odontologia com metodologias ativas de ensino na disciplina de Histologia
Authors: Dias Isis Patrícia Soares Silva , Vegian Mariana Raquel da Cruz , Sato Tábata Prado , Miranda Keila Cristina , Vasconcellos Luana Marotta Reis de , Salgado Miguel Angel Castillo , Spalding Marianne
Published: May 2021

Na busca para aperfeiçoar o processo de ensino-aprendizagem na área da saúde, estratégias e ferramentas pedagógicas que possibilitam uma participação mais ativa dos estudantes têm sido propostas como alternativas para substituir ou complementar o ensino convencional e unidirecional, considerando como pressupostos a aprendizagem significativa, o professor como mediador e a necessidade de aprender a aprender. Nesse contexto, o presente estudo avaliou a percepção de estudantes na disciplina de Histologia, do curso de Odontologia da Universidade Estadual Paulista de São José dos Campos/SP, após a aplicação de estratégias pedagógicas diferentes das aulas expositivas tradicionais. A partir do feedback dos estudantes em relação às experiências vivenciadas em sala de aula, foi possível verificar avaliações positivas quanto à utilização das metodologias ativas de ensino e, embora as opiniões possam divergir em alguns casos, as respostas sinalizam que tais metodologias podem contribuir para uma aprendizagem mais efetiva durante o curso.
Sposoby życia przedmiotów. O trwałości dóbr materialnych
Authors: Krajewski Marek
Published: May 2021

The article comprises an attempt to answer the question why some material objects are, in a social and cultural sense, more long-lasting than others. The answer lies in the model of the life-space of the things. This space is created by two basic dimensions. The first is defined by the character of the relationships created by the objects (this dimension comprises the opposition between the technical relations versus the communicative ones). The second is defined by the character of the relationship between the body of the user and the material object (this is created by the opposition: accessible or inaccessible to sensory experience). The transition of the material object through this space is the life-way of the object, and it is precisely this which defines the longevity of the object and thus the length of time it persists within a specific community. The author determines that long-lasting objects are above all those which are linked with the community, or users, by single, unambiguous relationships and links, while those which have ambivalent and multiple links are of shorter lifespan. Whether or not a thing has a long life or not is determined therefore by the multiplicity of meanings it has which render impossible its role as a stabiliser of the links that constitute a community, as a foundation of the individual’s identity, a guarantee of ontological security.
Teorie kuchenne. Dialektyka przyzwyczajeń i refleksyjności w koncepcji Jeana-Claude’a Kaufmanna
Authors: Schmidt Filip
Published: May 2021

A strong bias is observed in the popular sociological explanations toward those notions of human action which emphasize its rational nature, grounded on the assumption that any given action is an effect of the aims, values or attitudes of an actor. Such a point of view corresponds well with simple social surveys but fails to explain and describe inconsistencies in our thinking and acting, as well as those human activities which rest heavily on the “practical consciousness”, anchored in habits and material environment. Although there are some sociological approaches suited to explain these everyday practices, e.g. Merleau-Ponty’s phenomenology or Bourdieu’s idea of sense of practice, they are hardly used in empirical sociology. Drawing on Swidler’s notion of culture as a tool-kit, Giza-Poleszczuk’s and Marody’s model of social bond changes and, above all, on Jean-Claude Kaufmann’s theory, the paper aims at overcoming this stalemate. Kaufmann’s idea of habits and their dialectical relation with reflexivity is an attempt to create not only a multifaceted sociological theory of action but also empirical tools and guidelines designed to investigate the mundane interactions which have been already tested in several Kaufmann’s studies. Drawing on these empirical examples (mainly studies concerning housework and intimate relationships) Kaufmann’s main theoretical assumptions are described and discussed, as well as some aspects of their affinity with some other sociological theories (e.g. Berger’s and Luckmann’s notion of routine and habit, Bourdieu’s notion of habitus, American pragmatism and sociology of Bruno Latour).