bluuebunny/crossref_metadata_2025 huggingface dataset:
Exploring juventology: unlocking the secrets of youthspan and longevity programs
Authors: Brandhorst Sebastian , Longo Valter D.
Published: April 2024

In recent decades, the study of biological aging has evolved from simplistic theories like the free radical theory to more complex and nuanced perspectives. In particular, the identification of evolutionary conserved genes and signaling pathways that can modulate both lifespan but also healthspan has resulted in the expanding understanding of the link between nutrients, signal transduction proteins, and aging along with substantial support for the existence of multiple “longevity programs,” which are activated based on the availability of nutrients. Periodic fasting and other dietary restrictions can promote entry into a longevity program characterized by cellular protection and optimized function, and the activation of regenerative processes that lead to rejuvenation. This review discusses the idea of juventology, a novel field proposing the existence of longevity programs that can maintain organisms in a highly functional state for extended periods of time. Drawing upon research on Saccharomyces cerevisiae and other model organisms, the review explores the distinctiveness of juventology from traditional aging-centered views. The focus on the “age of youth” challenges conventional thinking and opens new avenues for understanding and extending the period of peak functionality in organisms. Thus, a “juventology”‐based strategy can complement the traditional gerontology approach by focusing not on aging but on the longevity program affecting the life history period in which mortality is very low and organisms remain youthful, healthy, and fully functional.
Food democracy as radical political agroecology: securing autonomy (alterity) by subverting the state-capital nexus
Authors: Tilzey Mark
Published: April 2024

Food democracy and political agroecology, as closely allied social movements, have become associated in the main with what may be termed ‘agrarian populist’ and postcolonial problematics. While certainly ‘radical’ in relation to hegemonic neoliberal, or sub-hegemonic ‘national developmentalist’, framings of contemporary agricultural and ecological crises and their mitigatory responses to them, populist food democracy and political agroecology, it is argued here, fail convincingly to identify causality underlying the ‘political’ causes of these capitalogenic contradictions. While more convincing in identifying such causality in the ‘ecological’ domain in terms of the need to ‘localize’ and ‘re-territorialize’ food production and consumption networks, in its ‘political’ aspect populist food democracy and political agroecology demonstrate a failure to specify key ontological drivers of capitalogenic contradiction in terms of state, capital, class, and, more generally, power relations in their historical particularity. These shortcomings of ‘populist’ food democracy and agroecology in their ‘political’ aspect are exemplified by reference to key academic texts arising from the movement. The paper then proceeds to identify how these populist assumptions differ from a Marxian derived understanding of contradiction and the resulting proposal for a ‘radical’ political agroecology as substantive food democracy.
Two synchronous primary mesenteric neuroendocrine tumors in a patient: a case report
Authors: Symeonidou Elissavet , Fouza Ariadni , Gkoutziotis Ioannis , Nikolaidou Christina , Petras Panagiotis , Mpallas Konstantinos
Published: April 2024

Primary mesenteric neuroendocrine tumors represent a rare clinical entity, challenging to manage, while a combination of imaging is demanded in order to differentiate it from metastatic disease, and set the diagnosis. If the tumor is resectable, surgery is the fundament of the therapeutic approach. The appearance of a second primary mesenteric tumor suggests an unacquainted scenario. The current article presents a case of a 40-year-old woman, who underwent laparoscopic excision of a mesenteric tumor located close to the left pararenal space. Pathology with immunohistochemistry examination reported neuroendocrine tumor grade 2. No further treatment was necessary. Seven months later, 68-Gallium DOTATATE detected another primary neuroendocrine tumor located at the right retroperitoneal space without other lesions. The second tumor was also resected laparoscopically, and the pathology confirmed the diagnosis of another neuroendocrine tumor G2. The postoperative course was uneventful, and six months later the patient is disease-free. The adequacy of 68-Gallium DOTATATE for the preoperative diagnosis of primary mesenteric tumors, the role of the laparoscopic approach, and the extent of lymph node resection are matters addressed in this article.
Synergistic Antibacterial Effects of Gallate Containing Compounds with Silver Nanoparticles in Gallate Crossed Linked PVA Hydrogel Films
Authors: Jackson John , Dietrich Claudia Helena
Published: April 2024

Currently available silver-based antiseptic wound dressings have limited patient effectiveness. There exists a need for wound dressings that behave as comfortable degradable hydrogels with a strong antibiotic potential. The objectives of this project were to investigate the combined use of gallates (either epi gallo catechin gallate (EGCG), Tannic acid, or Quercetin) as both PVA crosslinking agents and as potential synergistic antibiotics in combination with silver nanoparticles. Crosslinking was assessed gravimetrically, silver and gallate release was measured using inductively coupled plasma and HPLC methods, respectively. Synergy was measured using 96-well plate FICI methods and in-gel antibacterial effects were measured using planktonic CFU assays. All gallates crosslinked PVA with optimal extended swelling obtained using EGCG or Quercetin at 14% loadings (100 mg in 500 mg PVA with glycerol). All three gallates were synergistic in combination with silver nanoparticles against both gram-positive and -negative bacteria. In PVA hydrogel films, silver nanoparticles with EGCG or Quercetin more effectively inhibited bacterial growth in CFU counts over 24 h as compared to films containing single agents. These biocompatible natural-product antibiotics, EGCG or Quercetin, may play a dual role of providing stable PVA hydrogel films and a powerful synergistic antibiotic effect in combination with silver nanoparticles.
Myelodysplastic Neoplasms (MDS) with Ring Sideroblasts or SF3B1 Mutations: The Improved Clinical Utility of World Health Organization and International Consensus Classification 2022 Definitions, a Single-Centre Retrospective Chart Review
Authors: Mortuza Shamim , Chin-Yee Benjamin , James Tyler E. , Chin-Yee Ian H. , Hedley Benjamin D. , Ho Jenny M. , Saini Lalit , Lazo-Langner Alejandro , Schenkel Laila , Bhai Pratibha , Sadikovic Bekim , Keow Jonathan , Sangle Nikhil , Hsia Cyrus C.
Published: April 2024

Myelodysplastic neoplasms (MDS) with ring sideroblasts (RS) are diagnosed via bone marrow aspiration in the presence of either (i) ≥15% RS or (ii) 5–14% RS and an SF3B1 mutation. In the MEDALIST trial and in an interim analysis of the COMMANDS trial, lower-risk MDS-RS patients had decreased transfusion dependency with luspatercept treatment. A total of 6817 patients with suspected hematologic malignancies underwent molecular testing using a next-generation-sequencing-based genetic assay and 395 MDS patients, seen at our centre from 1 January 2018 to 31 May 2023, were reviewed. Of these, we identified 39 evaluable patients as having lower-risk MDS with SF3B1 mutations: there were 20 (51.3%) males and 19 (48.7%) females, with a median age of 77 years (range of 57 to 92). Nineteen (48.7%) patients had an isolated SF3B1 mutation with a mean variant allele frequency of 35.2% +/− 8.1%, ranging from 7.4% to 46.0%. There were 29 (74.4%) patients with ≥15% RS, 6 (15.4%) with 5 to 14% RS, one (2.6%) with 1% RS, and 3 (7.7%) with no RS. Our study suggests that a quarter of patients would be missed based on the morphologic criterion of only using RS greater than 15% and supports the revised 2022 definitions of the World Health Organization (WHO) and International Consensus Classification (ICC), which shift toward molecularly defined subtypes of MDS and appropriate testing.
Improved Production of Marandu Palisade Grass (Brachiaria brizantha) with Mixed Gelatin Sludge Fertilization
Authors: Ferreira Eduardo André , de Abreu Joadil Gonçalves , da Silva Wininton Mendes , Müller Danielle Helena , dos Santos Dalilhia Nazaré , Cremon Cassiano , dos Santos Weber Oscarlina Lúcia , Hoshide Aaron Kinyu , de Abreu Daniel Carneiro , Gonçalves Maybe Lopes , Júnior José Advan Pereira Pedrosa
Published: April 2024

Gelatin industry residues are increasingly used as fertilizer and soil conditioner. However, correct residue dosage is critical for grass development and minimizing environmental impacts. This randomized block design study determined adequate dosage of mixed gelatin sludge (MGS) for Marandu grass production in wet/dry seasons in Brazil. Five MGS levels (0–200% of required nitrogen) were compared to mineral fertilizer. Agronomic/productivity characteristics, bromatological composition, macro/micronutrient composition of leaves, and soil chemical attributes were evaluated. Agronomic/productivity characteristics were influenced by MGS dose in both dry/rainy seasons, except for leaf blade pseudostem ratio and percentage of leaves/pseudostem. Bromatological composition was influenced by MGS doses in dry/rainy seasons except for dry/mineral material quantities. Marandu leaf tissue chemical composition was significantly influenced by MGS dose, except for potassium, boron, and iron. Chemical composition of four soil layers between 0 and 50 cm influenced MGS dose, except for pH, organic matter, magnesium, copper, manganese, and zinc. GMS dose for Marandu production should be 200% of nitrogen requirement. MGS application increased productivity/quality of Marandu grass. Macronutrients (nitrogen, phosphorus) and micronutrients (calcium, magnesium, sulfur, copper, and zinc) increased in Marandu grass and in the soil (calcium, sulfur, and sodium). The increased sodium level was not limiting.
Skeletal Muscle Heat Shock Protein Content and the Repeated Bout Effect
Authors: Locke Marius , Bruccoleri Giovanni
Published: April 2024

The “Repeated Bout Effect” (RBE) occurs when a skeletal muscle is preconditioned with a few lengthening contractions (LC) prior to exposing the muscle to a greater number of LC. The preconditioning (PC) results in significantly less damage and preservation of force. Since it takes only a few LC to increase muscle heat shock protein (HSP) content, it was of interest to examine the relationship between HSPs and the RBE. To do this, one tibialis anterior (TA) muscle from Sprague–Dawley rats (n = 5/group) was preconditioned with either 0, 5, or 15 lengthening contractions (LC) and exposed to a treatment of 60 LC 48 h later. Preconditioning TA muscles with 15 LC, but not 5 LC, significantly elevated muscle αB-crystallin (p < 0.05), HSP25 (p < 0.05), and HSP72 content (p < 0.001). These preconditioned TA muscles also showed a significantly (p < 0.05) reduced loss of active torque throughout the subsequent 60 LC. While there was a trend for all preconditioned muscles to maintain higher peak torque levels throughout the 60 LC, no significant differences were detected between the groups. Morphologically, preconditioned muscles appeared to show less discernible muscle fiber damage. In conclusion, an elevated skeletal muscle HSP content from preconditioning may contribute to the RBE.
Synthesis and Characterization of Phenazine-Based Redox Center for High-Performance Polymer Poly(aryl ether sulfone)-5,10-Diphenyl-dihydrophenazine
Authors: Wang Qilin , Wang Xuehan , Zhai Yuehui , Zheng Zhibo , Shen Huilin , Han Yuntao , Chen Zheng , Jiang Zhenhua
Published: April 2024

Phenazine-based redox-active centers are capable of averting chemical bond rearrangements by coupling during the reaction process, leading to enhanced stabilization of the material. When introduced into a high-performance polymer with excellent physicochemical properties, they can be endowed with electrochemical properties and related prospective applications while maintaining the capabilities of the materials. In this study, a facile C-N coupling method was chosen for the synthesis of serial poly(aryl ether sulfone) materials containing phenazine-based redox-active centers and to explore their electrochemical properties. As expected, the cyclic voltammetry curves of PAS-DPPZ-60, which basically overlap after thousands of cycles, indicate the stability of the electrochemical properties. As an electrochromic material, the transmittance change in PAS-DPPZ-60 exhibits only a slight attenuation after as long as 600 cycles. Meanwhile, as an organic battery cathode material, PAS-DPPZ has a theoretical specific capacity of 126 mAh g−1, and the capacity retention rate is 82.6% after 100 cycles at a 0.1 C current density. The perfect combination of advantageous features between phenazine and poly(aryl ether sulfone) is considered to be the reason for the favorable electrochemical performance of the material series.
Renewable Energy Potential: Second-Generation Biomass as Feedstock for Bioethanol Production
Authors: Igwebuike Chidiebere Millicent , Awad Sary , Andrès Yves
Published: April 2024

Biofuels are clean and renewable energy resources gaining increased attention as a potential replacement for non-renewable petroleum-based fuels. They are derived from biomass that could either be animal-based or belong to any of the three generations of plant biomass (agricultural crops, lignocellulosic materials, or algae). Over 130 studies including experimental research, case studies, literature reviews, and website publications related to bioethanol production were evaluated; different methods and techniques have been tested by scientists and researchers in this field, and the most optimal conditions have been adopted for the generation of biofuels from biomass. This has ultimately led to a subsequent scale-up of procedures and the establishment of pilot, demo, and large-scale plants/biorefineries in some regions of the world. Nevertheless, there are still challenges associated with the production of bioethanol from lignocellulosic biomass, such as recalcitrance of the cell wall, multiple pretreatment steps, prolonged hydrolysis time, degradation product formation, cost, etc., which have impeded the implementation of its large-scale production, which needs to be addressed. This review gives an overview of biomass and bioenergy, the structure and composition of lignocellulosic biomass, biofuel classification, bioethanol as an energy source, bioethanol production processes, different pretreatment and hydrolysis techniques, inhibitory product formation, fermentation strategies/process, the microorganisms used for fermentation, distillation, legislation in support of advanced biofuel, and industrial projects on advanced bioethanol. The ultimate objective is still to find the best conditions and technology possible to sustainably and inexpensively produce a high bioethanol yield.
Water-Soluble Molecular Cages for Biological Applications
Authors: Montà-González Giovanni , Ortiz-Gómez Eduardo , López-Lima Rocío , Fiorini Guillermo , Martínez-Máñez Ramón , Martí-Centelles Vicente
Published: April 2024

The field of molecular cages has attracted increasing interest in relation to the development of biological applications, as evidenced by the remarkable examples published in recent years. Two key factors have contributed to this achievement: First, the remarkable and adjustable host–guest chemical properties of molecular cages make them highly suitable for biological applications. This allows encapsulating therapeutic molecules to improve their properties. Second, significant advances have been made in synthetic methods to create water-soluble molecular cages. Achieving the necessary water solubility is a significant challenge, which in most cases requires specific chemical groups to overcome the inherent hydrophobic nature of the molecular cages which feature the organic components of the cage. This can be achieved by either incorporating water-solubilizing groups with negative/positive charges, polyethylene glycol chains, etc.; or by introducing charges directly into the cage structure itself. These synthetic strategies allow preparing water-soluble molecular cages for diverse biological applications, including cages’ anticancer activity, anticancer drug delivery, photodynamic therapy, and molecular recognition of biological molecules. In the review we describe selected examples that show the main concepts to achieve water solubility in molecular cages and some selected recent biological applications.
Chiral Jahn–Teller Distortion in Quasi-Planar Boron Clusters
Authors: Zhao Dongbo , Zhao Yilin , Xu Tianlv , He Xin , Hu Shankai , Ayers Paul W. , Liu Shubin
Published: April 2024

In this work, we have observed that some chiral boron clusters (B16−, B20−, B24−, and B28−) can simultaneously have helical molecular orbitals and helical spin densities; these seem to be the first compounds discovered to have this intriguing property. We show that chiral Jahn–Teller distortion of quasi-planar boron clusters drives the formation of the helical molecular spin densities in these clusters and show that elongation/enhancement in helical molecular orbitals can be achieved by simply adding more building blocks via a linker. Aromaticity of these boron clusters is discussed. Chiral boron clusters may find potential applications in spintronics, such as molecular magnets.
Fusion of Multimodal Imaging and 3D Digitization Using Photogrammetry
Authors: Ramm Roland , de Dios Cruz Pedro , Heist Stefan , Kühmstedt Peter , Notni Gunther
Published: April 2024

Multimodal sensors capture and integrate diverse characteristics of a scene to maximize information gain. In optics, this may involve capturing intensity in specific spectra or polarization states to determine factors such as material properties or an individual’s health conditions. Combining multimodal camera data with shape data from 3D sensors is a challenging issue. Multimodal cameras, e.g., hyperspectral cameras, or cameras outside the visible light spectrum, e.g., thermal cameras, lack strongly in terms of resolution and image quality compared with state-of-the-art photo cameras. In this article, a new method is demonstrated to superimpose multimodal image data onto a 3D model created by multi-view photogrammetry. While a high-resolution photo camera captures a set of images from varying view angles to reconstruct a detailed 3D model of the scene, low-resolution multimodal camera(s) simultaneously record the scene. All cameras are pre-calibrated and rigidly mounted on a rig, i.e., their imaging properties and relative positions are known. The method was realized in a laboratory setup consisting of a professional photo camera, a thermal camera, and a 12-channel multispectral camera. In our experiments, an accuracy better than one pixel was achieved for the data fusion using multimodal superimposition. Finally, application examples of multimodal 3D digitization are demonstrated, and further steps to system realization are discussed.
Anonymous Traffic Detection Based on Feature Engineering and Reinforcement Learning
Authors: Liu Dazhou , Park Younghee
Published: April 2024

Anonymous networks, which aim primarily to protect user identities, have gained prominence as tools for enhancing network security and anonymity. Nonetheless, these networks have become a platform for adversarial affairs and sources of suspicious attack traffic. To defend against unpredictable adversaries on the Internet, detecting anonymous network traffic has emerged as a necessity. Many supervised approaches to identify anonymous traffic have harnessed machine learning strategies. However, many require access to engineered datasets and complex architectures to extract the desired information. Due to the resistance of anonymous network traffic to traffic analysis and the scarcity of publicly available datasets, those approaches may need to improve their training efficiency and achieve a higher performance when it comes to anonymous traffic detection. This study utilizes feature engineering techniques to extract pattern information and rank the feature importance of the static traces of anonymous traffic. To leverage these pattern attributes effectively, we developed a reinforcement learning framework that encompasses four key components: states, actions, rewards, and state transitions. A lightweight system is devised to classify anonymous and non-anonymous network traffic. Subsequently, two fine-tuned thresholds are proposed to substitute the traditional labels in a binary classification system. The system will identify anonymous network traffic without reliance on labeled data. The experimental results underscore that the system can identify anonymous traffic with an accuracy rate exceeding 80% (when based on pattern information).
A Coal Mine Tunnel Deformation Detection Method Using Point Cloud Data
Authors: Kang Jitong , Li Mei , Mao Shanjun , Fan Yingbo , Wu Zheng , Li Ben
Published: April 2024

In recent years, the deformation detection technology for underground tunnels has played a crucial role in coal mine safety management. Currently, traditional methods such as the cross method and those employing the roof abscission layer monitoring instrument are primarily used for tunnel deformation detection in coal mines. With the advancement of photogrammetric methods, three-dimensional laser scanners have gradually become the primary method for deformation detection of coal mine tunnels. However, due to the high-risk confined spaces and distant distribution of coal mine tunnels, stationary three-dimensional laser scanning technology requires a significant amount of labor and time, posing certain operational risks. Currently, mobile laser scanning has become a popular method for coal mine tunnel deformation detection. This paper proposes a method for detecting point cloud deformation of underground coal mine tunnels based on a handheld three-dimensional laser scanner. This method utilizes SLAM laser radar to obtain complete point cloud information of the entire tunnel, while projecting the three-dimensional point cloud onto different planes to obtain the coordinates of the tunnel centerline. By using the calculated tunnel centerline, the three-dimensional point cloud data collected at different times are matched to the same coordinate system, and then the tunnel deformation parameters are analyzed separately from the global and cross-sectional perspectives. Through on-site collection of tunnel data, this paper verifies the feasibility of the algorithm and compares it with other centerline fitting and point cloud registration algorithms, demonstrating higher accuracy and meeting practical needs.
Cultural aspects of model formation of socio-economic development in eu regions: a comparative analysis
Authors: Grigorova Darya Sergeevna
Published: April 2024

The article reveals the actual problem of cultural influence on the socio-economic development of the regions in the European Union. The research goal is to compare socio-cultural differences, which are significant factors for determining the vectors of socio-economic development of European countries. The article presents the results of an empirical study of the cultural components of regional models of socioeconomic development on the example of some countries of the European Union. The research materials were official statistics and expert assessments obtained as a result of a survey of specialists from various academic research structures on the social network Twitter. The total number of respondents from 9 European universities was 900 people. The research methodology is based on a sociocultural approach, includes the methods of the general scientific group and of special methods: historiographic analysis of scientific literature on the research topic, the method of comparative analysis, the method of sociological survey, statistical analysis, quantitative and qualitative research methods. Based on the empirical study, the following results were obtained: as the main cultural components that determine the specifics of the socio-economic development of the EU regions, the experts identified the historical context, national mentality, as well as value attitudes of behavior.
Ampliando os horizontes: divulgação do curso de engenharia de alimentos para alunos de uma escola pública de ensino médio
Authors: Masson Diana Rodrigues , Morais Henrique dos Santos , Silva Klinton Victor Tavares , Souza Adriana Régia Marques de , Oliveira Anne Karollyne de Souza , Suzuki Beatriz Haruka Hamawaki , Sena Lanna Luiza Sousa , Ferreira Victor Hugo Carvalho
Published: April 2024

Atividades de extensão dispostas pelas universidades buscam a troca de conhecimentos com a sociedade, promovendo o engajamento dos estudantes em projetos e ações que visam atender às necessidades da comunidade, tendo um impacto significativo nos jovens, tanto em seu desenvolvimento pessoal quanto em suas habilidades profissionais. Receber alunos do ensino médio na Universidade tem como objetivo difundir e promover uma experiência educacional mais abrangente, além do ambiente acadêmico, buscando ampliar seus horizontes acerca do curso e das áreas de atuação do profissional formado em Engenharia de Alimentos. Com o intuito de apresentar algumas áreas trabalhadas no curso de Engenharia de Alimentos a atividade de extensão, em parceria com uma escola da região central do município de Goiânia-GO, consistiu em três etapas no qual foi abordado o processamento do macarrão, a análise sensorial com diferentes alimentos e uma visita técnica pelo Setor de Engenharia de Alimentos, presente na Universidade Federal de Goiás. Durante esses momentos os alunos tiveram a oportunidade de observar, em pleno funcionamento, o ambiente de laboratórios, verificando sua dinâmica e organização, além do contato mais próximo com alunos de graduação e profissionais da área, possibilitando a troca de conhecimentos. A extensão universitária oferece aos jovens uma experiência transformadora, preparando-os para enfrentar os desafios do mundo real, desenvolver suas habilidades e competências, e contribuir de forma significativa para a sociedade, além de uma oportunidade valiosa que impulsiona seu crescimento pessoal, amplia suas perspectivas e os prepara para serem agentes de mudança em suas comunidades e no mundo.
Data-driven innovation: a model for education transformation
Authors: Ling Wong Woei
Published: April 2024

This paper proposes a continuous, linear data-driven innovation (DDI) model for education transformation grounded in evidence-based tools and data analysis. It advocates prioritizing “big data” and “small data” to inform incremental innovative changes in pedagogical practices. A detailed example of applying this DDI model in a Malaysian primary school is provided, including using exam results and quality standards to select a target school and diagnostic tests to identify issues. An intervention is designed utilizing multiplication tables and evaluated through public exam performance. Subsequent teacher training and student programs emerge. The model catalyzes ongoing localized innovations.
Public policies oriented to social development: budget analysis of the food assistance program in the State of Guanajuato, Mexico for the years 2018-2023
Authors: Galván-Zavala Karina
Published: April 2024

The global economic shows a significant increase in the
number of people living in poverty, with the regions of
Africa, Latin America, the Caribbean and some countries
in Asia being mainly affected. For Mexico, 2018 marks a
juncture in the country's governance that is guided by the
increase in public spending allocated to programs in
response to the global economic slowdown and the crisis
caused by the COVID-19 pandemic, which resulted in a
significant increase in indicators of poverty, inequality and
marginalization.
Urban renewal to turistification: Oaxaca de Juárez's historicwdownwtow.en
Authors: Cortés Matias Fanny Antonia
Published: April 2024

The city of Oaxaca, renowned for its rich history and
cultural diversity, has undergone a major transformation
in recent years. Seeking urban renewal and increased
tourism, authorities have dramatically altered the
character of the historic city center. This study analyzes
Oaxaca's urban renewal and resulting touristification, as
well as the socioeconomic and cultural impacts on local
residents, with a focus on the historic downtown.
Qualitative research methods like interviews,
observations, and analysis of historical documents were
used, along with quantitative data assessing tourism's
effects. While urban renewal can provide economic
revitalization, an overemphasis on tourism leads to
‘touristification,’ generating tension between tourism
interests and local needs. The findings indicate a rise in
Oaxaca's tourism, attracting investment and renewal, but
also leading to increased housing costs, resident
displacement, and potential cultural loss. Citizens are
divided: some welcome economic growth, while others
believe tourism undermines Oaxaca's essence. This
analysis aims to understand the interplay between urban
renewal and tourism in places with deep cultural and
historical roots.
Analysis of the impact of the COVID-19 pandemic on hotel occupancy in the main tourist destinations in Mexico
Authors: Rivera-López Faustino Benjamín
Published: April 2024

The article takes an innovative approach by longitudinally
assessing the impact of the pandemic on hotel occupancy in key
Mexican tourist destinations. Its solid quantitative
methodology, through statistical comparisons before and after
the crisis by season, denotes a rigorous scientific approach. The
segmentation of destinations by cluster analysis according to
post-pandemic recovery is a valuable contribution. The
empirical findings provide deep insight into the resilience of
destinations. It highlights the importance of diversifying
sources of demand and strengthening human and social capital
in the face of disruptive events. The study will set
methodological precedents for future research given its
replicability. Its modeling of the interaction between
government policies and market response provides useful
perspectives on public-private sector dynamics. The solid
analytical basis will facilitate designing differentiated strategies
to boost the sector's recovery. The recommendation to
implement tourism intelligence systems denotes visionary
public policy. In conclusion, this doctoral work exemplifies a
holistic and innovative approach to a phenomenon of global
interest.
Business model for enterprise 4.0
Authors: Canedo-Montoya Enrique Daniel
Published: April 2024

In this paper we propose a business model for the company
4.0. The model is validated with the case study of the toy
industry, focused on collecting figures. This domain was
selected as it requires an intensive use of information
systems and information technologies
Hilbert transform for modulation of interference fringes of liquid substances
Authors: López-Álvarez Yadira Fabiola
Published: April 2024

The demodulation of interferometric signals presents a
challenge in the study of object, especially when working
in environments with disturbances, instability or noise.
This document presents a procedure to demodulate a pair
of highly noisy interferograms obtained with a fiber optic
Mach Zehnder interferometer, the procedure is based on
using the reconfiguration of the interference fringes as a
result of Hilbert Transform. The method shown is fast, it
does not present susceptibilities at high frequencies, it
avoids demodulating interference patterns of closed
fringes and with little carrier signal, in addition, it allows
to verify the mathematical equivalence of the spectral
analysis using Fourier Transform. As an application
model, samples of liquid substances were used, where it
was possible to know changes between substances
according to their density
Geometric analysis as a design base for implementing joints assisted for the displacement of components in tilting furnaces
Authors: Téllez-Martínez Jorge Sergio
Published: April 2024

Various devices in productive chains implement parts that move
through pneumatic, hydraulic, electrical systems, or some
combination. Articulation-assisted displacement systems
implemented by hydraulic systems are of particular interest,
specifically, those used to lower bodies concerning support
points with a structure of degrees of freedom of movement. An
application in the metallurgical industry establish since processes
at high temperatures and elements of great mass make human
manipulation impossible. However, introducing these
automation operations makes standardizing and controlling
processing times possible. In this work, the procedure for the
mathematical approach through principles of analytical geometry
and trigonometry, to be develop as a contribution to the domain
of knowledge for the design of articulated systems. The above
applied to the displacement requirements in a melting furnace of
metal alloys allowed selection of the characteristics of hydraulic
components to implement in the consolidation of industrial
equipment.
Preliminary study of thermography applied to diagnosed faults in Diesel Engine and network rack
Authors: Cárdenas-Sánchez Enrique
Published: April 2024

In this study, we applied thermographic analysis to gather
data and establish decision criteria for the corrective
maintenance of electrical and mechanical systems. Our
main objective is to generate a thermographic database for
systems such as combustion engines and network racks.
To achieve this, we conducted preliminary experiments on
electrical and mechanical systems with known faults. We
also established calibration criteria for the thermal
emissivity of the components. Subsequently, we analyzed
a Diesel engine with induced faults, obtaining the
maximum temperature threshold in malfunctioning
components, as well as emissivity values. Additionally,
we carried out an analysis on a network rack, specifically
a 48-node Patch, with constant and intermittent connection
faults. Our methodology included analyzing the transience
of the mentioned systems to identify patterns indicating
wear, malfunction, or damage. The collected data allowed
us to create a database and perform calibration for
effective emissivity
Analysis of the mechanical behavior of a heat diffuser for electrical cells made of natural fiber-reinforced composite materials
Authors: Sánchez-Romero Ricardo Emmanuel
Published: April 2024

The automotive industry is currently moving towards electrification of
its vehicles to reduce CO2 emissions. As a result, manufacturers are
striving to offer electric vehicles that can provide the same benefits as
internal combustion vehicles and, if necessary, improve them. The main
component in the conformation of the electric cells adapted to the
vehicles requires a distribution that allows them to be balanced on the
chassis platform. In addition, a very important aspect to consider is the
fact that the configuration of the cells must support proper ventilation so
that they can dissipate the heat generated and optimize their operation.
Therefore, in this paper it is proposed to provide an alternative that can
support the ventilation of the cells, trying to take advantage of the
momentum of the vehicle using a diffuser capable of driving the air into
the cells and then out, which could generate greater stability to the
temperatures generated in the cell and extend the life of the vehicle. A
CAD model of the prototype will be designed based on modifications to
the one currently used; this will be done to give rise to a degree of
innovation in the development of production electric vehicles. On the
other hand, it is considered to evaluate the functionality of such part
simulating the basic conditions of resistance and deformation with the
use of modeling software considering different types of materials:
aluminum alloys; polymer matrix composites reinforced with fiberglass,
carbon and reinforced with natural fibers, such as coconut fiber and jute
Syntesis of amine and thiol silica modified: used of removal Ag(I) of aqueous
system
Authors: Salazar-Hernández Mercedes
Published: April 2024

The recovery of Au from rich cyanidation solutions is
usually carried out by adsorption on activated carbon, a
process that presents as its main disadvantage the
formation of fines in the classifying screens, these fines
represent a considerable loss of values in the process,
which is why The search for alternatives that allow the
recovery of gold and silver from rich cyanidation
solutions is of interest to hydrometallurgy. In this sense,
magnetic pre-concentration could be an alternative for
said process. the present work shows the study of the
removal of AgNO3 and [Ag(CN)2]- in synthetic aqueous
systems with mesoporous amino and/or thiol silicas
modified with magnetite (MS-NH2-Fe3O4 and MSNH2-SH-Fe3O4) . It is observed that the presence of
ligands of a softer nature favors the removal of Ag in AgCN systems, showing low removal capacity for amine
materials.
MFCC feature extraction for COPD detection
Authors: Villafuerte-Lucio Diego Ángel
Published: April 2024

Mel Frequency Cepstral Coefficients (MFCC) are acoustic
features, which are based on human auditory perception,
focus on spectral properties and capture relevant features
of the audio signal related to vocal tract shape and energy
in different frequency bands. The methodology for feature
extraction involves several stages. First, the audio signals
go through a preprocessing stage in which they are initially
normalized, then background noise is reduced, and finally,
they pass through a median filter. In the next block of
MFCC feature extraction, the first task was to split the
audio signal into small frames. Then, a hamming window
is applied to smooth the edges of each frame and the short
time Fourier transform of each frame is calculated. Next,
Mel filters are applied, which adjusts the representation of
the frequency spectrum to human auditory perception.
Finally, cepstral coefficients are calculated from the
frequency spectrum. The MFCC coefficients are then used
as input features for classifiers and machine learning
algorithms.
Posgrados en Nutrición Clínica
Authors: Trejos-Gallego Diana
Published: April 2024

Editorial de la Presidenta
Literacy in the Time of Artificial Intelligence
Authors: Kalantzis Mary , Cope Bill
Published: April 2024

The latest mutation of Artificial Intelligence, Generative AI, is more than anything a technology of writing. It is a machine that can write. In a world-historical frame, the significance of this cannot be understated. This is a technology in which the unnatural language of code tangles with the natural language of everyday life. Its form of writing, moreover, is multimodal, able not only to write text as conventionally understood, but also to “read” images by matching textual labels and to “write” images from textual prompts. Within the scope of this peculiarly mechanical manufacturing of writing are mathematics, actionable software procedure, and algorithm. This paper explores the consequences of Generative AI for literacy teaching and learning. In its first part, we speak theoretically and historically, suggesting that this development is perhaps as momentous for society and education as Pi Sheng’s invention of moveable type and Gutenberg’s printing press—and in its peculiar ways just as problematic. In the paper’s second part, we go on to propose that literacy in the time of AI requires a new way to speak about itself, a revised “grammar” of sorts. In a third part, we discuss an experimental application we have developed that puts Generative AI to work in support of literacy and learning. We end with some findings and implications for literacy education and with a proposal for what we will call cyber-social literacy learning.
Archétype, anarchétype, eschatype
Authors: Braga Corin
Published: April 2024

Ce travail se propose de distinguer trois grandes méta-typologies définissant trois structures imaginaires (artistiques, littéraires, etc.) qui se partagent la culture européenne et mondiale. Je pars du concept d’archétype, passant en revue les acceptions qu’il a reçues au cours de l’histoire des idées : métaphysique (essence ontologique, comme les Idées de Platon), psychologique (matrices inconscientes, comme chez Jung) et culturelle (invariant, comme les loci de Curtius). Je traite comme archétypales les œuvres qui ont une structure centrée, dépendant d’un sens unique, qui se résument en un scénario explicatif cohérent. Par l’anarchétype, je désigne les structures anarchiques qui refusent le centre et le logos, qui évoluent d’une manière imprévisible, dans des séquences qui ne peuvent pas recevoir une interprétation linéaire. On pourrait comparer les structures archétypales à des systèmes solaires, alors que les structures anarchétypales rappellent plutôt le gaz cosmique résultant de l’explosion d’une supernova. Enfin, par l’eschatype (du grec eschatos, eschata, eschaton = le dernier), je comprends les structures qui se constituent dans le temps, d’une manière téléologique, en vue d’un sens final qui n’est pas évident dès le principe. Si les œuvres archétypales sont construites sur un scénario initial, les corpus d’œuvres eschatypiques n’arrivent à un modèle explicatif qu’après une évolution interne. La démarche de distinguer ces trois paradigmes me paraît nécessaire parce que, faute d’instruments d’analyse, le canon occidental risque de ne valoriser que les structures archétypales (et en moindre mesure les structures eschatypiques), et de rejeter et déprécier comme des aberrations et des échecs les œuvres anarché-typiques.
Le corps-énergie : expérimentation, théorie et pratique
Authors: Fintz Claude
Published: April 2024

Au travers des expérimentations multiformes de chez Michaux, le corps, dans sa globalité charnelle et mentale, apparaît comme un avatar de l’énergie : un manchon de vent qui stabilise provisoirement un paquet d’énergies, voilà ce que la drogue apprend de la réalité du sujet. Cette interprétation métaphysique de l’énergie en vient à fonder sa pratique artistique : l’énergie, jamais neutre, prend une coloration affective, accessible à une forme de connaissance émotionnelle. C’est ainsi également que Michaux, par sympathie, comprend la folie comme un phénomène énergétique et il reprend contact avec certains aspects méconnus de l’imagination créatrice et participante ; l’artiste (re)connaît « comment les choses se tiennent » sous la surface phénoménale. Il découvre en outre une utilisation singulière de l’énergie, à travers sa pratique de la malédiction. Puis, passant de l’art à l’art de vivre, il apprend enfin à utiliser l’énergie de ses échecs. Michaux par le corps-énergie accède à un savoir sur la nature du Réel : toute matière (et toute trace) s’avère être de l’énergie que l’on peut domestiquer, transformer et transmettre. Car celle‑ci se transmet à travers le corps, d’un esprit à un esprit, soulignant ainsi le lien qui existe entre corps et esprit, et production et réception des signes.
Une lecture géocritique des structures anthropologiques de l’imaginaire
Authors: Westphal Bertrand
Published: April 2024

La lecture critique des préfaces successives et de l’ouvrage de Gilbert Durand, les Structures anthropologiques de l’Imaginaire, révèle une anthropologie de l’imaginaire et une perception de l’espace fondée sur une conception d’un imaginaire universel et de structures nécessairement analogues entre les cultures et les mythologies. La géocritique de B. Westphal, les réflexions de Deleuze proposent une nouvelle théorie de l’espace qui laisse place à l’indétermination, la bivalence des symboles et l’hétérogénéité des espaces et des territoires et ils sont venus remettre en question cette théorie durandienne de l’espace paradoxalement très ancrée dans une pensée de la mémoire et du temps et de l’universalisme.
L’imaginaire, les neurosciences et l’olfactif : confirmations et extrapolations
Authors: Lambert Hervé-Pierre
Published: April 2024

La prise en compte de l’olfaction dans les sciences cognitives et les neurosciences a notamment permis de s’intéresser aussi aux dysfonctionnements de ce sens et d’examiner certains phénomènes linguistiques (inadéquation entre langage et odorat) ou littéraires (la mémoire proustienne). Neurologie et anthropologie semblent en arriver à la même conclusion sur l’inadéquation universelle entre le langage humain et les odeurs, à l’opposé de la relation entre langage et couleurs.
Autour de l’odeur de sainteté, les parfums dans le monde chrétien
Authors: Benoît Jean-Louis
Published: April 2024

Dans le monde chrétien, il est beaucoup question de parfums. On la retrouve dans la liturgie fondée sur les Écritures (encens, baume). Une lecture de la Bible mais aussi de la vie des saints montrent que des parfums extraordinaires (« odeurs de sainteté ») figurent dans de nombreux récits anciens et modernes. Parmi les saints, la figure majeure de la sainte est la Vierge Marie. Il n’est pas étonnant que ce soit par elle, en elle, autour d’elle, que se diffusent le plus ces fragrances miraculeuses. Ce sont des signaux, venus du Ciel, subtils, agréables et discrets, envoyés à tous, pour se convertir et se tourner davantage vers Dieu. Le parfum a une origine divine, liée au souvenir et à l’espérance du Paradis. Il est aussi la marque d’un corps qui a échappé à la mort et qui est entré dans la vie éternelle.
L’imaginaire, un chant de bataille antillais
Authors: Auzas Noémie
Published: April 2024

Au sein de la littérature antillaise, la réflexion romanesque et théorique de Patrick Chamoiseau porte un nouveau regard sur une notion maintes fois définie : celle d’imaginaire. L’imaginaire ne saurait demeurer un ensemble abstrait et essentialiste, pétri d’invariants. La défiance de P. Chamoiseau vis-à-vis de l’imaginaire mythique ne scelle pour autant pas sa mort, mais ouvre un espace littéraire où tout reste à créer. Dans l’œuvre chamoisienne, l’imaginaire devient l’enjeu majeur d’un champ de bataille idéologique dont le personnage principal est le Guerrier de l’imaginaire. Ambitionnant de passer du monolinguisme au multilinguisme, les langues française et créole, visibles dans les textes, cristallisent alors les redéfinitions toujours mouvantes de l’imaginaire.
Quelques traces du trickster dans la littérature médiévale
Authors: Azuela Cristina
Published: April 2024

Il semblerait que toutes les cultures ont en commun un personnage qui transgresse les lois sociales et abuse ses semblables, même s’il peut, en même temps, représenter un héros civilisateur. Malgré les contradictions et ambiguïtés qui déterminent la figure du trickster ou joueur de tours mythique, on partira d’une classification des composantes fondamentales de son identité pour examiner ses traces chez plusieurs personnages de la littérature médiévale tels que Loki, Renart, Tristan, Merlin et Robin Hood, ainsi que chez les mystificateurs anonymes des courts récits.
Nine Venomous Thoughts or a Mythical Definition of the Mole Cricket in Lithuania
Authors: Vaitkevičienė Daiva
Published: April 2024

The mole cricket is an ambiguous insect: many tales and folkloric archives from Lituania or others countries, draw a paradoxical picture of this strange animal. Whereas its ninth and venomous thought is able to kill you at one bite, once the other eight thought are formulated, magical mystery uses it to cure and save your body and soul. Several names are given to it, and there it goes from the symbol of luck to the image of death.