bluuebunny/crossref_metadata_2025 huggingface dataset:
Effectiveness of New Media Technologies on Agricultural Production among Rural Households in Akwa Ibom State, Nigeria
Authors: Effiong John B. , Iheme Martina N.
Published: February 2024

Background: This study assessed the effectiveness of new media channels on agricultural production among rural households in Akwa Ibom State. The objectives of the study were; to identify the socio-economic characteristics of the respondents in the study area, identify the types of new media channels available to rural households in the study area and assessed the effectiveness of new media on agricultural production in the study area. Methods: A multi stage sampling technique was used to select 250 respondents used for the study. Data were collected using structured questionnaire and analyzed using both descriptive and inferential statistics. Result: The results of the study revealed that 36.6% of the respondents were aged between 41-50 years, with 39.20% and 28.20% having secondary and primary levels of education respectively. Whatsapp was the most popular new media channel available to the farming households. In terms of effectiveness, it was observed that new media was effective mostly in improving crop and animal husbandry. The results of the hypothesis showed that age of the farmers and educational level of the farmers were found significant. It is concluded that new media is a veritable tool in the development of agriculture in Akwa Ibom State in particular and Nigeria in general.
Application of Plant Aqueous Extracts on Yield and Quality Parameters of Soybean Seeds (Glycine max L.)
Authors: Mamlic Z. , Djukic V. , Vasiljevic S. , Miladinovic J. , Bajagic M. , Dozet G. , Djuric N.
Published: February 2024

Background: In order to reduce the use of synthetic and chemical agents in agriculture, more and more research is turning to ecological, more environmentally friendly methods. Plant aqueous extracts are products that can be a significant source of various elements, depending on the type and quality of soil on which the plant species from which the solution is prepared is grown. Methods: The aim of this study was to investigate the influence of aqueous extracts of different plant species on the yield and quality parameters of soybean seeds (Glycine max L.). Aqueous extracts of: nettle, nettle+comfrey, banana, banana peel, onion, willow and soybeans were used foliarly. The 1st foliar treatment plants was done when first flowers opened and the 2nd treatment was done when first pod reached final length. Result: The effect of aqueous extracts depends on the agroecological conditions and the analyzed traits. In 2020 the greatest effect was achieved on the free proline, SOD, Px and CAT. In 2021 the application of certain aqueous extracts had a significant effect on the yield, gerimination energy, germination percentage and vigour seed.
Different levels of physical activity and postural balance in women with multiple sclerosis
Authors: Machado Eduarda F. A. , Moraes Andrea G. , Bueno Guilherme A. S. , Dos Santos Mendes Felipe A. , De David Ana C.
Published: February 2024

BACKGROUND:Multiple Sclerosis (MS) presents some clinical manifestations that may indicate motor, sensory and cognitive dysfunctions. Motor dysfunctions in MS are related to balance impairment, muscle weakness, gait, and fatigue and can lead to a significant decrease in quality of life. Postural balance is crucial for daily life activities and can be assessed by posturography.
AIM:The primary objective was to evaluate the influence of different levels of habitual physical activity (PA) on postural balance in women with MS. Additionally, we included an evaluation of walking, mobility, fatigue, and quality of life.
METHOD:This is a cross-sectional study with 25 women with MS. Habitual PA was measured using the Baecke-Questionnaire, separated into low-level (LL) and high-level (HL) PA. Posturography was used to evaluate postural balance and obtain displacement of the center of pressure (CoP-speed, CoP-area). We evaluated gait spatiotemporal-parameters (GAITRite), walking performance (6MWT), functional mobility (TUG), fatigue (FSS, MFIS), and quality-of-life (FAMS).
RESULTS:The difference in CoP-speed and CoP-area was significant (p<0.05) with LL group presented greater values than the HL group. We found a medium effect size CoP-speed (Cohen’s d=0.6) and higher CoP-area (Cohen’s d=1.1).  No significant differences with the other variables were found.
CONCLUSION:The results showed that the group with a LL PA presented worse postural balance compared to the group HL. Although level of PA and balance seem to be related, the results of this cross-sectional study could not confirm a causal inference. It is important to develop different strategies to increase PA levels and posture balance in women with MS.
Fatigue effect on muscle coactivation during inversion movement in females with chronic ankle instability
Authors: Teruya Thiago T. , Soares Alex S. O. C. , Serrão Julio C. , Mochizuki Luis , Amadio Alberto C.
Published: February 2024

BACKGROUND: An ankle sprain is a relevant public health issue. Fatigue changes the neuromuscular response in people with chronic ankle instability (CAI).
AIM: To evaluate the muscle co-activation on people with chronic ankle instability using cross-correlation analysis.
METHOD: Twenty-four healthy women were selected and divided into stability and instability groups. Ankle sprain was simulated with a mechanical platform. Electrical muscle activity (fibularis brevis, FB; fibularis longus, FL; gastrocnemius lateralis, GL; and tibialis anterior, TA) and platform acceleration were recorded at 2KHz. Two sets of 8 right and eight left foot fall in random order were performed before and after the fatigue protocol. Fatigue protocol ended when the volunteer increased the test run time by 150% of the best round. Co-activation was calculated with cross-correlation. Agonist-agonist (FB-FL, FB-GL, and FL-GL) and agonist-antagonist (TA-GL, TA-FB, and TA-FL) pairs were evaluated. Statistical significance was p<0.05.
RESULTS: Co-activation was lower for the instability group. Fatigue did not induce changes in 5 out of the 6 analyzed muscle pairs.
CONCLUSION: CAI is a factor of joint instability. Fatigue may not be relevant in altering joint stability. Therefore, interventions should be focused on enhancing joint stability.
Proposta de Critérios de Internamento em Psiquiatria
Authors: Mota Jorge , Teixeira Pedro , Rodrigues Tiago , Lourenço Helder , Moreira Susana , Martins Daniela , Horta Pedro , Quarenta João , Teixeira Tânia
Published: February 2024

N/a.
The LGBT Center, espaço de memória
Authors: Santos Victor
Published: February 2024

O presente artigo discute o arquivo da organização comunitária The Lesbian, Gay, Bissexual and Trans Community Center, de Nova York, a história de sua fundação nos anos 1980 e sua relevância atual. A heteronormatividade coloca historicamente pessoas LGBT+ em situação de vulnerabilidade. Com o surgimento da crise do HIV/AIDS, a partir de 1981, se observa uma piora aguda de tal situação. Além de prestar serviços de acolhimento e saúde, o LGBT Center constituiu-se como um importante espaço de preservação da memória de pessoas que a LGBTfobia e a AIDS vulnerabilizaram. Muitos dos objetos da coleção, seja por razões de não se encaixarem no cânone da “arte”, seja por serem explicitamente homossexuais, seriam facilmente descartados ou destruído. Analisando o acervo, composto desde “obras de arte” como pinturas, desenhos e murais, a fotografias documentais, cartazes, broches e cartas, somos colocados diante de questionamentos sobre as hierarquias entre arte erudita, documento histórico, cultura popular e mídias de massa. Ao fazê-lo, torna-se necessário balizar algumas questões candentes à história da arte e suas práticas. Partindo de alguns dos materiais da coleção, indaga-se de que modo essas divisões podem ser aplicadas e se são relevantes para as especificidades da população LGBT+.
O vitral como acervo a céu aberto ou incorporado aos espaços internos dos museus
Authors: Mello Regina Lara Silveira , Almeida Teresa
Published: February 2024

O artigo apresenta reflexões sobre o vitral exposto como objeto no interior de museus, distante de sua aplicação original na arquitetura. Em visitas a igrejas e edifícios civis, observações registradas em fichas técnicas e fotos, foram percebidas diferenças curatoriais geradas pelo deslocamento dos vitrais para o interior dos museus, expostos como coleções privadas, demonstrações técnicas de criação e restauro ou pensados como pinturas de luz, painéis de vidro retro iluminados criados especialmente para o espaço interno. Nas imensas catedrais europeias ou na igreja matriz de muitas cidades do interior de São Paulo, o conjunto de vitrais apresenta coerência temática configurada em simbologia tradicional, como alegorias contando a vida de santos ou milagres. Em locais civis como mercados, teatros e escolas, o vitral reafirma a função do edifício, o público percebe a temática exposta, numa curadoria que envolve vitral e arquitetura. Museus do vitral, criados a partir da década de 1970, ampliam as possibilidades criativas, resgatam e valorizam esta preciosa arte em vias de extinção.
Inferencing Space Travel Pricing from Mathematics of General Relativity Theory, Accounting Equations, and Economic Functions
Authors: Peng Kang-Lin , Xue Xunyue , Yu Liqiong , Ren Yixin
Published: February 2024

This study derives space travel pricing by Walrasian Equilibrium, which is logical reasoning from the general relativity theory (GRT), the accounting equation, and economic supply and demand functions. The Cobb-Douglas functions embed the endogenous space factor as new capital to form the space travel firm’s production function, which is also transformed into the consumer’s utility function. The market equilibrium then occurs at the equivalence of supply and demand functions, like the GRT presents the equivalence between the spatial geometric tensor and the energy-momentum tensor, which explains the principles of gravity and the motion of space matter in spacetime. The mathematical axiomatic set theory of the accounting equation explains the equity premium effect that causes a short-term accounting equation inequality, then reaches the equivalence by suppliers’ incremental equity through the closing accounts process of the accounting cycle. On the demand side, the consumption of space travel can be assumed as a value at risk (VoR) investment to attain the specific spacetime curvature. Spacetime market equilibrium is then achieved to construct the space travel pricing model. The methodology of econophysics and analogy method was applied to infer the space travel pricing by the model of profit maximization, single-minded, and envy-free pricing in unit-demand markets. Results show that space travel pricing remains the principle of market equilibrium but needs to be extended to the spacetime tensor.
Feeling Our Place in the World: An Active Inference Account of Self-Esteem
Authors: Albarracin Mahault , Bouchard-Joly Gabriel , Sheikhbahaee Zara , Miller Mark , J. Pitliya Riddhi , Poirier Pierre
Published: February 2024

Self-esteem, the evaluation of one's own worth or value, is a critical aspect of psychological well-being and mental health. In this paper, we propose an active inference account of self-esteem, casting it as a sociometer, or an inferential capacity to interpret one's standing within a social group. This approach allows us to explore the interaction between an individual's self-perception and the expectations of their social environment.When there's a mismatch between these perceptions and expectations, the individual needs to adjust their actions or update their self-perception to better align with their current experiences. We also consider this hypothesis in relation to recent research on affective inference, suggesting that self-esteem enables the individual to track and respond to this discrepancy through affective states such as anxiety or positive affect. By acting as an inferential sociometer, self-esteem allows individuals to navigate and adapt to their social environment, ultimately impacting their psychological well-being and mental health.
Based on Absolute Airspace Reference System Analysis of Doppler Effect of Light (Electromagnetic Wave)
Authors: Zhao Shandong , Zhao Yijia
Published: February 2024

In this paper, the concept of absolute airspace is further elaborated, and the time transform effect, the frequency transform relation of clock timing, and the principle of Doppler effect of special relativistic light are analyzed and demonstrated. Based on the concept of absolute airspace, a new and accurate Doppler effect relation of light (electromagnetic wave) is proposed. It is proved that there is a synchronous relationship between the time shift effect and the frequency change of the timing inside the clock. When the light (electromagnetic wave) source is in motion, the Doppler effect includes two physical mechanisms: the frequency change caused by time transformation effect and the frequency change caused by relative motion. When the light source is in motion, the Doppler effect of the light there are some differences in different directions due to the rotation of the earth. The relation of Doppler effect of special relativistic light is only a highly approximate relation, and its theoretical basis, special relativity, is flawed in principle.
A Review on Key Technologies and Developments of Hydrogen Fuel Cell Multi-rotor Drones
Authors: Shen Zenan , Liu Shaoquan , Zhu Wei , Ren Daoyuan , Feng Yu , Xu Qiang
Published: February 2024

Multi-rotor drones, a kind of unmanned equipment which is widely used in military, commercial consumption and other fields, has been developed very rapidly in recent years. However, their short flight time has hindered the expansion of their application range. This can be addressed by utilizing hydrogen fuel cells, which exhibit high energy density, strong adaptability to ambient temperature, and no pollution emissions, as the power source. Accordingly, the application of hydrogen fuel cells as the power source in multi-rotor drones is a promising technology that has attracted significant research attention. This paper summarizes the development process of hydrogen fuel cell mul-ti-rotor drones and analyzes the key obstacles that need to be addressed for the further development of hydrogen fuel cell multi-rotor drones, including structural lightweight, hydrogen storage methods, energy management strategies. Additionally, prospects for the future development of hydrogen fuel cell multi-rotor drones are presented.
Balloon Pulmonary Angioplasty for Chronic Thromboembolic Pulmonary Hypertension: Insights from a Low-Volume Centre and Comparative Analysis with Other Centres
Authors: Ivanauskiene Taida , Cesna Sigitas , Grigoniene Egle , Gumbienė Lina , Daubaraite Aurelija , Ivanauskaite Kaste
Published: February 2024

Background and Objectives: To evaluate the effectiveness and safety of balloon pulmonary angio-plasty in patients with inoperable chronic thromboembolic pulmonary hypertension in Vilnius Pulmonary Hypertension Referral centre and provide comparative analysis with other centres. Materials and Methods. This study included all balloon pulmonary angioplasty procedures per-formed between 2019 and 2024 in a single tertiary centre. Invasive haemodynamic parameters and clinical variables were assessed at baseline, at the end of invasive treatment, and at the con-clusion of follow-up (average 8.6 months) following the last balloon pulmonary angioplasty. Ad-ditionally, respective literature review was performed. Results. Twenty-six patients with inoper-able chronic thromboembolic pulmonary hypertension were enrolled. The mean age of the pa-tients was 61.6 (40-80) years. Each patient underwent an average of 4.2 (1-9) procedures. Fol-low-up data were available for 12 patients. Mean pulmonary arterial pressure decreased by 38.8% (p
Global Perspectives on Hepatitis B Vaccination: Challenges, Achievements, and the Road to Elimination by 2030
Authors: Al-Busafi Said A. , Alwassief Ahmed
Published: February 2024

Annually, more than 1.5 million preventable new hepatitis B (HBV) infections continue to occur, with an estimated global burden of 296 million individuals living with chronic hepatitis B infection. This substantial health challenge results in over 820,000 annual deaths attributed to complications such as liver cirrhosis and hepatocellular carcinoma (HCC). HBV vaccination remains the cornerstone of public health policy to prevent chronic hepatitis B and its related complications. It serves as a crucial element in the global effort to eliminate HBV, as established by the World Health Organization (WHO), with an ambitious 90% vaccination target by 2030. However, reports on global birth dose coverage reveal substantial variability, with an overall coverage rate of only 46%. This comprehensive review thoroughly examines global trends in HBV vaccination coverage, investigating the profound impact of vaccination on HBV prevalence and its consequences across diverse populations, including both high-risk and general demographics. Additionally, the review addresses the formidable challenges and facilitating factors essential for achieving WHO's HBV vaccination coverage objectives and elimination strategies in the coming decade and beyond.
Investigating the Out-of-plane Bending Stiffness Properties in Hybrid Species Diagonal Cross-laminated Timber Panels
Authors: Kurzinski Shaghayegh , Crovella Paul
Published: February 2024

Since the introduction of Cross-laminated Timber (CLT) in Austria in the early 1990s, the adoption of this 90°-crosswise-laminated product has seen exponential growth worldwide. Compared to traditional laminated timber products (e.g. glulam), CLT provides improved dimensional stability, but with reduced out-of-plane bending stiffness. To improve the bending stiffness, while maintaining relative dimensional stability, a modified orientation of the inner layers in a diagonal direction can be used. This novel product is Diagonal-Cross-laminated Timber (DCLT), a composite timber product, consisting of inner layers which are rotated at different angle-ply orientations between 0 and 90 degrees to the outer layers. To properly model the out-of-plane bending behavior of the DCLT, analytical models and Finite Element Analysis (FEA) were used and the results were validated by third-point bending tests performed on DCLT panels with angle-ply orientations of 10°, 20°, 40°, 70°, and a conventional CLT 90° panel. The results indicate that DCLT panels with angle-ply cross-layers have a structural advantage in out-of-plane bending over traditional CLT (90°) panels. The development of DCLT and its introduction to the industry could enable the use of lower-quality timber that would not otherwise satisfy structural requirements for CLT.
A Compressible Formulation of the One-Fluid Model for Two-Phase Flows
Authors: EL OUAFA Simon , VINCENT Stephane , LE CHENADEC Vincent , FEREKA Syphax , TROUETTE Benoît , CHADIL Amine
Published: February 2024

In this paper, we introduce a compressible formulation for dealing with 2D/3D compressible
interfacial flows. The formulation is combined with an original monolithic solver, according to which
a strong velocity-pressure coupling is achieved. The results show that the scheme can ensure
accuracy and stability for various fluid flow scenarios: from the standard incompressible conditions
to compressible flows, spanning both single-phase and two-phase flows.
Chemical Composition and Coloration Genesis of Black - Black Cyan Nephrite from Margou Deposit, Qiemo county, Xinjiang, China
Authors: Fang Ting , Yang Mingxing , Chang Yuan
Published: February 2024

The nephrite belt in Altun Mountain-Western Kunlun Mountain region spanning approximately 1300 km in Xinjiang, NW China, constituting the world's largest preeminent nephrite deposit. The Qiemo region in the Altun Mountain is a crucial nephrite-producing area in China with demonstrating substantial prospects for future explorationl. While extant research has extensively study on secondary deposits in the Karakash River and native black nephrite deposits in Guangxi Dahua, a lacuna exists in the comprehensive investigation of black nephrite from original deposits in Xinjiang. Margou nephrite represents a recent discovery of black-toned nephrite deposits in Qiemo County, Xinjiang, warranting a comprehensive investigation into this primary source of black nephrite within the region. This scholarly inquiry deploys a suite of sophisticated analytical techniques, encompassing Polarizing microscope, electric microprobe, Backscattered Electron Image, X-ray Fluorescence, Inductively Coupled Plasma Mass Spectrometry. The rigorous experimental test is dedicated to elucidating the chemical and mineralogical composition, and further clarify the type of its genetic types of black-black cyan nephrite from Margou deposit in Qiemo, Xinjiang. Results delineate the mainly composed of tremolite-actinolite, characterized by Mg/(Mg + Fe2+) ratios ranging from 0.86 to 1.0. Minor minerals include diopside, epidote, pargasite, apatite, zircon, pyrite and iron hydroxide. Bulk-rock rare earth element patterns exhibit distinctive features such as negative Eu anomalies (δEu=0.00~0.17), decreasing light rare earth elements, a relatively flat distribution of heavy rare earth elements, and low with total REE concentrations (1.64~38.9 μg/g), concurrently, the Cr (6~21 μg/g) and Ni (2.5~4.5 μg/g) contents are conspicuously low. The magmatic influence of granite emerges as pivotal factor in the genesis of magnesia skarn hosting the Margou nephrite. The distinctive black-black cyan colour is attributed to heightened iron content, mainly associated with FeO (0.08~6.29%). The discerned chemical composition characteristics posit the Margou nephrite as an exemplar of the magnesia skarn-type nephrite deposit.
Application of Computational Contact tools of Finite Element Analysis to Predict Ground‐Borne Vibrations Generated by Trains in Ballasted Tracks
Authors: García Moreno Andrés , Alonso López Antonio , Turias Ignacio J. , Ruiz Aguilar Juan Jesús
Published: February 2024

Predictive numerical models in the study of ground-borne vibrations generated by railway sys-tems have traditionally relied on the segmented approach of subsystems. In this approach, loads are individually applied, and the cumulative effect of rolling stock is obtained through superposi-tion. While this method serves to mitigate computational costs, it may not fully capture the com-plex interactions involved in ground-borne vibrations.
Recent advancements in computational and software tools have enabled the development of more sophisticated vibrational pollution models. These advanced models encompass the entire dynamic system, from the rolling stock to the terrain, allowing for continuous simulations with a defined time step. Furthermore, the incorporation of computational contact tools between various ele-ments not only ensures temporal accuracy but also extends the analysis to the frequency domain.
This paper explores the evolution of predictive numerical models in the context of ground-borne vibrations generated by trains on ballasted tracks. It highlights the shift from segmented models to continuous simulations, demonstrating the progressive advancement towards more comprehen-sive and accurate representations of railway-induced and generated vibrations in the track sur-roundings as an additional way of evaluate sustainability of infrastructures.
In particular, this development of a numerical model from its inception aimed to expand upon ex-isting emission - prediction models by enriching the data with frequency-domain information. This approach has been driven by the aspiration to bridge the gap between numerical predictions and measured signals, striving for a higher level of accuracy in our obtained results.
This model can predict the impact of a high-speed rail (HSR) vehicle passing on its own track. It possesses sufficient information in both the time and frequency domains to precisely characterize vibrations. This initiative marks a pivotal advancement, enabling us to more effectively capture the intricacies of ground-borne vibrations and their impact on the surrounding environment due to a deeper comprehension of the occurrences in the frequency domain, there's a heightened ca-pability to accurately characterize vibrations.
Counter Drone Technology: A Review
Authors: Gonzalez-Jorge Higinio , Aldao Enrique , Fontenla-Carrera Gabriel , Veiga-López Fernando , Balvís Eduardo , Ríos-Otero Eduardo
Published: February 2024

Unmanned Aerial Vehicles (UAVs), commonly known as drones, have experienced a significant surge in both civilian and military applications, owing to their versatility and cost-effectiveness. However, a negligent use or the operation with harmful intent of these aircraft poses a potential risk to public safety and the privacy of individuals. In response to this threat, counter-drone systems have been developed in recent years, including technologies to detect, position, and neutralize these aircraft. This paper presents a review of different existing commercial counter-drone systems, the technologies behind detection, tracking, and classification, as well as soft and hard kill mitigation.
Angling for Causality behind Security: Natural Causes of Armed Conflict in Iraq
Authors: Malekovic Ninoslav , Vonk Maarten , Birkman Laura , Sweijs Tim , Kononova Anna , Baeck Thomas
Published: February 2024

Despite significant milestones in armed conflict research generally and climate security research specifically, methodologically tight explanation of naturally caused armed conflict still leaves much to be desired. In this article we unpack the black box of the climate-security nexus and advance causal modelling of armed conflict. To infer effects of natural causes on armed conflict outcomes, we apply recent advances in causal methods to conflict outcomes that have been non-experimentally observed across Iraqi municipalities. Retrieval of an entire empirical causal structure of climate-conflict pathways allows us to corroborate the existence of a cause-and-effect relationship between climatological, environmental, and demographic variables and armed conflict. We confirm that soil temperature, population density, and variability of latent energy cause an increase in fatalities, while rice production decreases fatalities. We discuss our findings, their limitations, and future research directions, and reflect on their relevance for policy interventions.
Overview of microscale analytical methods for the quantitative detection of bioaccumulative contaminants in small tissue masses
Authors: Laber Charles , Lotufo Guilherme , Scircle Austin , Netchaev Jenifer , Bednar Anthony
Published: February 2024

For many bioaccumulation studies, generation of large sample masses of exposed organisms is challenging or even prohibitive. Therefore, the use of smaller sample masses for analysis without compromising data quality or quantitative level achieved is desirable. To this end, a variety of microanalytical procedures have been developed that used 1 g or less of tissue to address specific experimental challenges. However, these methods have not been systematically evaluated or published. The present work evaluates the current state of the microanalytical methods reported and identifies additional needs that would benefit US Army Corps of Engineers (USACE) research and navigation dredging programs. Discussions with commercial laboratories revealed that they typically do not accept small sample masses and require individual sample masses ranging from 10 to 20 g wet weight of tissue per analysis. If they do analyze a small mass sample, they routinely do not modify their standard process, resulting in detection and reporting limits orders of magnitude higher; therefore, essentially useless nondetect data are generated for regulatory decisions. To address the lack of commercial availability of microanalytical methods, we recommend pursuing method development and subsequent validation of microscale extraction and analysis of a variety of common contaminant compounds in tissue matrices.
Plan de negocio Cevichería delivery Sr. Fish 28
Authors:   , Peña Urbina Frank Davis
Published: February 2024

Estamos ideando un plan de negocio para la cevichería delivery Sr. Fish28 con el objetivo de determinar la rentabilidad que puede llegar a tener el emprendimiento, para lograrlo aplicaremos estrategias innovadoras que nos permitan penetrar en el mercado zonal e ir abarcando la mayor cantidad de espacio y clientes. Sr. Fish28 se dedicará a la elaboración de exquisitos platos de la gastronomía peruana a base de pescados y mariscos; este modelo de negocio estará dirigido para todas las familias, desde los pequeños de la casa hasta los de mayor edad. Empezaremos en la zona residencial de Mangomarca SJL, después planeamos crecer y repartir a los distritos cercanos. Realizaremos un análisis a través de un estudio de mercado, es así que, aplicaremos nuestras estrategias de negocio que nos permiten competir y satisfacer la demanda de nuestros posibles clientes. Este plan de negocio demostrará que podemos tener una considerable rentabilidad identificando propuestas económicas y capacidad financiera. Así mismo seremos cuidados con la elaboración de nuestro producto y cumpliremos con todas las normas sanitarias para el cuidado de nuestros clientes.
Métodos de diagnóstico y tratamiento actuales de la osteoartritis de la articulación temporomandibular: una revisión de la literatura
Authors:   , Llerena Fernandez Elsa Lucero
Published: February 2024

El artículo comprende una revisión de los factores etiológicos que se asocian a la Osteoartritis (OA) de la Articulación Temporomandibular (ATM) y a los hallazgos imagenológicos, que son imprescindibles para el correcto diagnóstico y determinación de la etapa de evolución de la enfermedad. También se desarrollan los métodos de tratamientos invasivos y no invasivos. Los objetivos del presente artículo fueron describir los métodos de diagnóstico y tratamiento más actuales y eficientes para la osteoartritis de la articulación temporomandibular y determinar la existencia de la correlación clínica e imagenológíca en las diferentes etapas de enfermedad. De acuerdo a una revisión de la literatura, se encontró que el método de diagnóstico con mayor relevancia para la OA de la ATM es la Tomografía Computarizada de Haz Cónico (TCHC), por sus múltiples ventajas; el método de tratamiento más eficiente durante la etapa sintomatológica de la enfermedad es la artrocentesis sinergizada con ácido hialurónico o plasma rico en plaquetas, cabe enfatizar que no se encontraron correlaciones directas suficientes entre la sintomatología clínica y los cambios óseos y de la OA de ATM empleando la TCHC.
Efectos del tratamiento ortopédico en la articulación temporomandibular en pacientes clase III con mordida cruzada anterior: una revisión de literatura
Authors:   , Moscoso Sivirichi Karen
Published: February 2024

El estudio tuvo como objetivo de evaluar los efectos del tratamiento ortopédico en la articulación temporomanbular (ATM) en pacientes clase III con mordida cruzada anterior. Cuatro bases de datos fueron revisadas hasta diciembre del 2022 (Scopus, PubMed, Embase y Science Direct). Dos revisores independientes seleccionaron estudios que reportaran cambios en el ATM y presencia de disfunción de la ATM en pacientes Clase III con mordida cruzada anterior que recibieron tratamiento ortopédico. La calidad metodológica de los estudios fue analizada usando PRISMA checklist. Materiales y métodos: Se seleccionó doce artículos para el estudio después de una búsqueda detallada de acuerdo con los criterios de selección. Resultados: Después del tratamiento, estudios demostraron una baja prevalencia de dolor en la ATM después del uso de la máscara facial de Delaire, de la mentonera, del Jasper Jumper modificado y el Twin block reverso fijo. Después del tratamiento con Twin block reverso se evidenció un aumento de volumen condilar y de los espacios articulares (p<0,001), seguido de una disminución significativa de los espacios articulares posterosuperior (p<0,001). Conclusiones: No se ha encontrado suficiente evidencia que determine presencia de DTM o cambios en la ATM después del uso de aparatos ortopédicos para corrección de mordida cruzada anterior.
Calidad de servicio y satisfacción de los clientes de la empresa Giros Husan Money Perú E.I.R.L (Loreto-Perú) 2022
Authors:   , Rojas Gutierrez Jesus Arturo , Sanchez Monsefu Hugo Lino
Published: February 2024

El mundo empresarial ha crecido vertiginosamente desde la industrialización en el siglo XXI, lo que ha generado un crecimiento económico para las empresas, esto ha llevado a la expansión de las PYMES para lograr satisfacer las demandas de un creciente mercado, en donde estas compiten constantemente para mejorar la calidad de sus servicios y con ello poder mantener a sus clientes satisfechos. El propósito principal conforme a lo expuesto es permitir poder determinar si la calidad de servicio que se está ofreciendo, se relaciona con la satisfacción que se llevan los clientes, en una pequeña empresa dedicada a lo giros de dinero, ubicada en el departamento de Loreto; y en donde se procedió establecer conforme la investigación continuaba tres dimensiones para cada una de las variables propuestas. Metodológicamente, la investigación conto con enfoque cuantitativo además de ello esta fue de alcance correlacional, el presente estudio fue enmarcado en el diseño correlacional; la muestra fue conformada por 83 clientes de la empresa de giros, el cual estuvo conformada por los clientes frecuentes, correspondientes al cuarto bimestre del año, en donde se ejecutó un cuestionario de 20 ítems desarrollada bajo la escala de Likert. Con la información recopilada se pudo concluir la existencia de una correlación importante entre las variables de estudio con p<0.05 y se encontró un Rho de Spearman de 0.596.
Gestión de cuentas por cobrar y su incidencia en la liquidez de la empresa METASIL S.A.C.- Lurigancho en el año 2021
Authors:   , Montero Romani Jazmin Valeria
Published: February 2024

El presente trabajo de investigación titulada “Gestión de cuentas por cobrar y su incidencia en la liquidez de la empresa Metasil S.A.C., Lurigancho, 2021”; se llevó a cabo con el propósito principal de determinar si la gestión de cuentas por cobrar está relacionada con la liquidez de una empresa. La gestión medida a partir de las ventas al crédito, políticas de cobranzas, políticas de crédito, indicadores de liquidez y gestión. Se enmarca es un tipo de investigación básica, de diseño no experimental, siendo el nivel de estudio correlacional y de enfoque cuantitativo; con una población de 40 trabajadores siendo la muestra 20 trabajadores, como técnica se empleó la encuesta siendo el instrumento el cuestionario; lo que permitió recopilar la información necesaria. La asociación fue calculada mediante la prueba de Spearman. Se encontró que hay una correlación fuerte y positiva (ρ= 0,807) entre la gestión de las cuentas y la liquidez, este resultado es evidencia de que la relación es significativa. Se concluyo que la gestión de cuentas por cobrar se relaciona con la liquidez de la empresa Metasil.
Evaluación de lesiones periapicales utilizando tres índices mediante tomografía computarizada Cone Beam
Authors:   , Gallardo Gutierrez Cesar Antonio
Published: February 2024

El uso de tomografía computarizada Cone Beam (CBCT) puede favorecer el diagnóstico temprano de periodontitis apical e influir en su pronóstico y tratamiento; sin embargo, no existe una estandarización entre los índices que determinan la presencia de lesiones periapicales en esta técnica radiológica. El popósito del estudio fue evaluar lesiones periapicales utilizando tres índices sobre CBCT. La población de estudio estuvo conformada por todas las CBCT realizadas en un centro radiológico peruano durante un año, se realizó un muestro no probabilístico y se evaluaron 36 tomografías Cone Beam con los índices CBCT-PAI, COPI y CBCT-ERI; los datos recolectados fueron analizados estadísticamente y se determinó que el índice CBCT-PAI identificó 91,7% lesiones periapicales; el índice COPI, 72,2% y el índice CBCT-ERI, 88,9%. Asimismo, se aplicó la prueba χ2 de Pearson y se determinó un valor de p=0,05. Por lo tanto, se concluyó que el diagnóstico de lesiones periapicales sobre tomografía computarizada Cone Beam puede presentar resultados similares cuando se evalúa con cualquiera de los índices CBCT-PAI, COPI o CBCT-ERI.
Actividad física y estrés percibido en docentes universitarios que laboran de forma remota en el contexto de la pandemia por SARS-CoV-2
Authors:   , Cruz Ausejo Ruth Liliana
Published: February 2024

Introducción: la pandemia COVID-19 aceleró la adopción temprana del trabajo remoto y propició así, junto a la inestabilidad del contexto, la variación en los niveles de actividad física y estrés. Objetivo: identificar la asociación entre el estrés percibido (EP) y el nivel de actividad física (AF), así como explorar su relación con características sociodemográficas, familiares, laborales e individuales en docentes universitarios que hacen trabajo remoto en el contexto de la pandemia. Materiales y métodos: estudio transversal. El resultado fue el nivel alto de EP evaluado con la Escala de estrés percibido (EEP-14). La AF se midió con el Cuestionario Internacional de Actividad Física (IPAQ). Se estimaron las razones de prevalencia ajustadas (PRa) con un IC de 95% usando modelos de regresión de Poisson con varianzas robustas. Se desarrollaron cinco modelos para evaluar asociaciones individuales entre el EP y AF con variables sociodemográficas, familiares, laborales e individuales. Resultados: Participaron 191 docentes; 39.27% fueron mujeres, edad 52 (RIQ: 41-60). La prevalencia de alto estrés fue 47.12%. La asociación entre AF y EP, fue significativa en todos los modelos. El modelo global mostró que, en comparación con la AF moderada, hubo una asociación estadísticamente significativa entre EP y la AF alta (PRa=0,18; 0,06-0,59), AF baja (PRa=1,42; 1,01-1,99), influenciado principalmente por la edad, ser cabeza de familia y la calidad del sueño. Conclusión: La AF mostró una asociación negativa con los niveles de EP, indicando que niveles más altos de AF se relacionan con niveles más bajos de EP. Además, características en docentes como el ser cabeza de familia, edad y calidad de sueño son factores asociados a una mayor probabilidad de tener alto estrés. Estudios posteriores podrían considerar el rol de condiciones individuales y familiares en el EP y AF dada la permanencia de la educación híbrida.
Time-dependent S-wave areas predict sudden cardiac death risk: a prospective, multicentre registered study
Authors: Wang Xinfeng , Liu Wenhao , Zheng Ziheng , Gu Wenli , Chen Zhiteng , Guo Qi , Wu Liqun , Xu Wei , Su Yangang , Chen Keping , Wu MaoXiong , Chen Qian , Xie Xiangkun , Wu Xiaoying , Liu Xiao , Li Hongwei , Yang Yuedong , Zhang Yuling , Chen Yangxin , Qi Mengling , Zhao Huiying
Published: February 2024

Objectives
The present study aimed to detect novel and time-dependent ECG parameters by analysing 24-h ECG data, especially the area under ECG waves.
Design:
Prospective, multicentre cohort study
Setting:
Four hospitals in China
Participants:
High risk of sudden cardiac death, including 43 survivors of sudden cardiac death (SCD) or patients who suffered haemodynamic disorder due to sustained ventricular tachycardia/ventricular fibrillation (SCDHR group), 138 patients with HF who did not experience sustained ventricular tachycardia/ventricular fibrillation but were diagnosed with dilated cardiomyopathy or ischaemic cardiomyopathy with LVEF ≤ 35% (HF group), and 108 healthy controls who presented with no heart disease (HC group).
Exposure:
Time-dependent ECG parameters by analysing 24-h ECG data
Main outcome measures:
The area under ECG waves was separately analysed to determine their associations with SCDHR and HF in the test set and was further examined in the validation set. Logistic regression analyses were performed.
Results
The multivariate logistic regression model for discriminating SCDHR patients and HCs indicated that the average area under the S-wave (inteS_mean) at 16:00–21:00 was positively associated with SCDHR (OR > 1, P-adjust < 0.050) and significantly (P value = 0.014) differed at 21:39 in the validation set. Similarly, the model for discriminating HF and HC indicated that the inteS_mean, minimum S-wave area (inteSm), and difference in S-wave and T-wave (inteST) were positively (OR > 1, P-adjust < 0.050) associated with HF in both the test set and validation set.
Conclusions
The time-dependent S-wave area-related ECG parameters (inteS_mean, inteSm, and inteST) are potentially early predictive factors for SCD risk.
Trial registration:
This study was registered on the website of http://register.clinicaltrails.gov/Organization. The Clinical Trials ID is NCT03485079.
An Ecological Perspective to Master the Complexities of the Digital Economy
Authors: Rovenskaya Elena , Ivanov Alexey , Hathiari Sarah , Kotova Daria , Sharler Ursula , Boza Gergely
Published: February 2024

Economic and social interactions are shifting to the digital space, facilitated by digital platforms. Successful platforms grow into vast ecosystems combining multiple offerings, where diverse users derive value from interactions while ecosystem orchestrators harvest massive revenue. The success of the ecosystem business model stems from their ability to swiftly adapt to fast-changing environments, including new technologies and volatile demands. Adaptation happens through dynamic innovation in a decentralised decision-making setting, which renders digital platform ecosystems complex adaptive systems (CAS). Utilizing extensive knowledge on natural ecosystems as prime examples of a CAS, the paper proposes a systematic framework for understanding and describing digital platform ecosystems, rooted in evolution and ecology. The 5M Framework organizes the complexity of the digital economy into a hierarchy of interconnected elements and processes. As platforms face heightened scrutiny about their socio-economic power and societal value, the framework can facilitate the development of sustainable governance of the digital economy.
Generation Mechanism and Surface Characteristics of Axial Ultrasonic Vibration-assisted Milling (AUVAM) Micro-Texture
Authors: cao qingyuan , chen xintong , zhang zongbo , zhang rui
Published: February 2024

AUVAM is a theoretically promising method for manufacture of complex micro-textures on the workpiece surface due to its low cost and high efficiency. However, due to the generation mechanism of AUVAM processing is indeterminacy, it is difficult to reproduce the ultrasonic amplitude completely. In this paper, the influence of the end cutting edge angle on empty cutting and interference is found to be the main cause for the height of the micro-texture cannot be consistent with the amplitude. The effects of AUVAM parameters including material elastic recovery, relief angle, cutting edge arc radius, feed per tooth and spindle speed on micro-texture profile have been researched. The relationship between milling parameters and wettability is also analyzed. Through controlling these parameters, the whole micro-texture surface consistent with the set amplitude can be directly obtained by AUVAM, a controllable design of surface hydrophobicity is also achieved.
Towards Gamification of Science and Mathematics in Upper Primary Schools in Uganda
Authors: Kanagwa Benjamin , Kahiigi Evelyn Kigozi , Semwanga Agnes Rwashana , Siminyu Samuel , Lubowa Paul
Published: February 2024

The research involved a needs assessment study for the application of gamification technology in teaching and learning of science and mathematics in upper primary (P5, P6 and P7)- typically 10 to 13 year olds. Gamification in education has been praised to create competition, critical thinking and collaborative engagement, which support construction of new knowledge, thus creating a positive learning environment. The research aim was to establish the challenging topics (hard to understand) in Science and Mathematics developing computer based gamification that would be used to support the teaching and learning. Additionally the research was used to identify the ICT training needs of the staff. It was observed that topics that relate to systems such as digestive system, blood circulation system, reproductive system were challenging in science. Challenging topics in mathematics included integers, sets and fractions.
Characteristics of soil CO2 and CH4 fluxes in birch forests during the autumn freeze‒thaw period in the permafrost region of the Daxing′an Mountains, Northeast China
Authors: Gao Minglei , Man Xiuling
Published: February 2024

The autumn freeze-thaw period is an important period to influence soil carbon dynamics. However, the activities of soil CO2 and CH4 in different stand ages of birch forests in high latitude perennial permafrost regions of China during this period are not clear. Therefore, in this study, we investigated soil CO2 and CH4 fluxes in 30a, 45a, and 66a Brich forests in the Daxing'an Mountains permafrost zone, and established the relationships between soil CO2 and CH4 fluxes and soil temperature and humidity, and soil active carbon and nitrogen. The results showed that soil CO2 and CH4 fluxes of all three stand ages showed a gradual decrease during the monitoring period. Soil CO2 and CH4 fluxes showed a trend of increasing and then decreasing with stand age. The average soil CO2 flux of 30a (19.24±4.03) mg·m-2 h-1 was the lowest throughout the monitoring period and was significantly smaller than that of the other two stand ages (P<0.05). 45a and 66a had average soil CO2 fluxes of 36.44±5.20 mg·m-2 h-1 and 35.49±4.22 mg·m-2 h-1, respectively, which were not significantly different from each other (P>0.05). The average uptake fluxes of 45a (-25.92±3.55) μg·m-2 h-1 > 66a (-24.73±4.01) μg·m-2 h-1 > 30a (-12.22±2.33) μg·m-2 h-1, and 30a was highly significantly smaller than 45a and 66a (P<0.01), and the difference between 45a and 66a was not significant (P>0.05). Soil temperature and moisture were both highly significant on soil CO2 and CH4 fluxes. NO3--N and MBC/N had greater effects on soil CO2 and CH4. The global warming potentials ranged from 2171.84—4132.93 kg/hm-2.