bluuebunny/crossref_metadata_2025 huggingface dataset:
El proyecto de Universidad gironiano para la clase trabajadora y su sistema de estudios
Authors: Delgado Granados Patricia
Published: February 2024

El proyecto de Universidad gironiano orientado a la clase obrera tiene sus referentes institucionales y docentes en la Universidad de Trabajo belga, fundada en 1903, y en los Institutos Laborales españoles, surgidos en la posguerra. El objetivo era crear las Universidades del pueblo, de los pobres, de la clase obrera, verdaderos monumentos al trabajo que sirvieran además de propaganda de la política social de la dictadura franquista. Significaron el medio de promoción social de la clase trabajadora, lo que Girón de Velasco denominó la “previsión social ofensiva”, mediante el acceso a un puesto laboral de cierta categoría profesional que les devolviera la moral al trabajo y les alejara de la lucha de clases.
Rogério Fernandes: cidadão e historiador da educação (1933-2010)
Authors: Louro Felgueira Margarida
Published: February 2024

Rogério Fernandes: cidadão e historiador da educação (1933-2010)
Caride Gómez, J. A., Trillo Alonso, F. (Dirs.) (2010), Diccionario Galego de Pedagoxía
Authors: Costa Rico Antón
Published: February 2024

CARIDE GÓMEZ, J. A., TRILLO ALONSO, F. (Dirs.) (2010), Diccionario Galego de Pedagoxía
Negrín Fajardo, Olegario, Memoria histórica y educación en Canarias (1936-1942). Depuración y represión del Magisterio en la provincia de Las Palmas
Authors: Porto Ucha Anxo Serafín
Published: February 2024

NEGRÍN FAJARDO, Olegario, Memoria histórica y educación en Canarias (1936-1942). Depuración y represión del Magisterio en la provincia de Las Palmas
Supervisor Workplace Violence Against Young Workers by Victim's Race/Ethnicity
Authors: Lopez Camryn
Published: February 2024

Working is often seen as an integral aspect of growing up in the United States. Due to the increased desire for independence and financial gain, many adolescents decide to pursue the expansion of their job skills by entering the labor force. Adolescents crave financial independence and freedom. However, many are unaware of the risks that accompany working. The perpetrators of adolescent workplace violence are generally thought to be customers or coworkers. But what if it was the supervisor?

The main objective of the study is to determine whether abusive supervision of young workers differs depending on the worker’s race/ethnicity. Using secondary data analysis from a cross-sectional study, we were able to provide the difference in abusive supervision by the adolescent race/ethnicity.

The result show adolescents experienced hostility, bullying, and workplace violence and that there was a relationship between these experiences and the workers' race/ethnicity. The negative perception of supervisors in terms of hostility, workplace violence, and bullying are, by and large, perceived to be experienced differently among adolescents by their race/ethnicity.
A Different Kind of Shot
Authors: McCann Alexandra Maria
Published: February 2024

COVID-19 and its mitigation through social distancing, masking, and preventative vaccination have impacted societies worldwide, leading to controversy regarding public health policy. This dissertation investigates the determinants of the vaccination behavior of 18-24-year-old college students in four-year public institutions in the United States, specifically concerning coronavirus. Of interest are reasons “why” or “why not” students would opt for or against the COVID-19 shot. Findings could aid in messaging public policy targeted toward a desired audience. Concepts related to policy, public health, beliefs, and their effects on the willingness to receive the coronavirus shot are explored. Prospect Theory – decision-making under risk and uncertainty – serves as the theoretical framework, including the theory’s key components of probability and severity. Existing data sets collected by the American College Health Association – the National College Health Assessment – for the survey periods Fall 2020, Spring 2021, and Fall 2021 – are utilized. The final data set comprises 62,267 cases, analyzed with binary nominal logistic regression. Of note is the unexpected finding that COVID-19 vaccination uptake outpaced flu and HPV shots by 20%. In addition, other findings did not align with previous research: male students, students with caregiver responsibilities, and those in relationships are less likely to participate in preventative health behaviors. Prior works also outlined that the risk component of Prospect Theory should be operationalized based on probability when applied to the health domain.

For this analysis, risk encompasses both severity (as the coronavirus disease may vary from person to person) and probability (the likelihood of infection with the disease). The odds ratio analysis finds that probability has a far more significant effect on the student’s willingness to receive the vaccine than the element of severity.

As a result of the analysis producing unexpected and expected findings, future research should include components that address political ideology and the politicization of the COVID-19 disease. In addition, targeted surveys could further explore the severity and probability elements in more detail.
The Effect of Group Interactions and Group Structure on Achievement in Elementary School Robotics Classrooms
Authors: Yogi Jonathan Kimei
Published: February 2024

Jung and Won's (2018) review of elementary school ER found a lack of understanding of instructional practices for ER with young children. Other researchers have called for further studies into what effective classroom orchestration and interaction look like within ER classrooms (Ioannou & Makridou, 2018; Xia & Zhong, 2019). This study was conducted to understand the effect of group interactions and group structure in terms of gender on achievement in elementary school robotics classes. Knowing the effect that interactions have on students' achievement can help inform instructional practices and pedagogies in educational robotics activities (Kucuk & Sisman, 2017). The study was conducted at a primary school in Nonthaburi, Thailand. The participants included 103 second-grade students (44 male, 59 female). A mixed methods embedded research design was used as a framework to make observations of interactions, conduct a robotics assessment, and analyze the data from the assessment. Cooperative learning (CL), which is the use of instructional small groups to maximize learning (Johnson et al., 1999) was used as a lens for observing student interactions. Group processing, positive interdependence, and promotive interactions are some of the primary elements of CL and used as classifications of student interactions in the robotics classrooms and during the assessment. The robotics assessment consisted of multiple challenges where students were given a score in their skills of generalization, algorithmic thinking, and their Level of Achievement (LoA). The LoA was the sum of all the challenges completed. The mean scores of the students’ assessment results were analyzed using separate one-way ANOVAs to explore the effect of group structure and interaction types on achievement. It was found that the types of interactions in a group can have an effect on achievement depending on the types of robotics challenges. It was also found that gender did not have an effect on the student's LoA during their robotics assessment, but it did have an effect on the types of interactions seen among students. It is recommended that for simpler robotics challenges that utilize basic generalization skills, instructors should try to facilitate promotive interactions within the classroom groups. For more advanced robotics challenges that utilize algorithmic thinking skills, instructors should try to facilitate group processing within their classroom groups.
Kinetic Barriers for Leakage Reduction in DNA Autocatalytic Strand Displacement Networks
Authors: Lysne Drew
Published: February 2024

Currently medical diagnostic methods suffer from the need for skilled labor, bulky, sophisticated and expensive equipment, ideal lab environments and ample time. A point-of-care biosensor can alleviate these problems and allow for more mobile disease detection. To meet this need, researchers have looked to DNA strand displacement networks to perform molecular level computation through a series of DNA strand displacement reactions in which disease associated biomarker inputs can trigger a cascaded signal to produce a readable output downstream in a matter of minutes. Such quick readable outputs require signal amplification. While amplification can be achieved through enzymatic activity, enzymes introduce their own drawbacks. In attempt to eliminate the need for enzymes, entropically driven autocatalytic DNA strand displacement networks are an exclusively DNA approach in which autocatalysts must remain in a metastable state with other network components until activated by an initial catalyst. Premature interaction without an input, known as leakage, can lead to a catalyst release and result in a false signal. Such interactions are counterproductive to reliable disease detection as a biosensor. Toward addressing the leakage problem, I introduce a set of leakage reduction approaches including: hairpin fuels, interfering strands, and steric moieties. These approaches exploit conformational barriers (hairpins), intermittent hybridization barriers (hairpin and interfering strands), and strictly physical barriers (steric moieties). These kinetic barriers resulted in up to 21%, 22% and 1% increases in network performance respectively. This research also reinforced the power of availability as a network design tool and showed that steric moieties are capable of modulating kinetic reaction rates of over three orders of magnitude, demonstrating its immense potential as an important design consideration.
Investigating Novel Food Sensitization: A Real-Life Prevalence Study of Cricket, Locust, and Mealworm IgE-Reactivity in Naïve allergic Individuals
Authors: Scala E , Abeni D , Villella V , ViIlalta D , Cecchi L , Caprini E , Asero R
Published: February 2024

Background | With the global population on the rise, edible insects are considered a potential solution to food security, although concerns about risks such as anaphylaxis exist. Methods | 2,014 participants underwent testing with the Allergy Explorer-ALEX-2 including extracts of three novel foods: Acheta Domesticus (Ad), Locusta migratoria (Lm), and Tenebrio molitor (Tm). The IgE-mediated sensitization status was investigated in participants who had never knowingly consumed these insects. Data was recorded using an electronic database. Results | 195 individuals (9.7% of all participants) were sensitized to insects. Tropomyosin was co-recognized by 34%, and 18.5% were positive for arginine kinases. Reactivity to Sarcoplasmic-CB, Troponin-C, Paramyosin, or Myosin-light-chain was found in less than 5% of the population, whereas 108 individuals (55.4%) did not show any reactivity to invertebrate panallergens. Additionally, 33 individuals (16.9%) exhibited monosensitization exclusively to insects. Multivariate analysis revealed an inverse association between arachnid reactivity and sensitization to insect allergens, while Mollusca, Blattoidea, and tropomyosin reactivity displayed a direct relationship. Furthermore, Myosin-light-chain reactivity correlated with Ad and Lm, and Troponin-C with Ad and Tm sensitization. Conclusion | Edible insect extract IgE sensitization was observed in individuals without prior exposure to such foods. Mites showed a low likelihood of being primary sensitizers due to their inverse association with insect reactivity. Conversely, the direct association of insect sensitization with mollusk and cockroach extract reactivity suggests their potential as primary sensitizers in these participants. Tropomyosin consistently exhibited a positive association with reactivity to all studied insects, supporting its role as a primary sensitizer.
Mindful aging: an insightful examination of cognitive impairment in the elderly population of Chengalpattu, Tamil Nadu, using Mini-Cog scale
Authors: M. Vinoth Kumar , D. Thirunaaukarasu , M. Geetha , D. Catherine Rexy
Published: February 2024

Background: By 2050, United Nations projects that one in five Indians would be 60 years of age or older. This demographic transition is likely to be accompanied by substantial rise in prevalence of cognitive problems, which will have an impact on quality of life among elderly people. Effective screening at primary level would help in identification of burden of diseases and better planning at secondary and tertiary level.
Methods: A community-based cross-sectional study over a period of three months was conducted at Pulipakkam in Chengalpattu district. The estimated sample size was 215, and simple random sampling method was used. Elderly people aged 60 years and above who consented to participate were included in the study. After obtaining informed consent, they were screened using the Mini-Cog tool which combines a short memory test with a simple clock- drawing test followed by a recall component.
Results: The 215 participants in total were screened. The mean age of participants was 66.02±3.83 years. The prevalence of cognitive impairment (CI) based on Mini-Cog scale was 44.2%. Females (44.8%) had marginally higher prevalence than males (43.8%). CI was more prevalent among people over 65 years (57.6%). The likelihood of experiencing CI was higher among those who lived without their spouse (59.4%), were unemployed (53.7%), and who were smokers / alcoholics (63.7%). 
Conclusions: Considering the high burden of CI, there is need for long term prospective research for a comprehensive profile of mental disorders at community level. Early assessment and detection of CI could help in improving quality of life of elderly. Implementing initiatives aimed at increasing awareness, reducing stigma, and conducting widespread screening using reliable tools.
A rare case of granular cell tumour of the buccal mucosa and its surgical management-A case report
Authors: Jillapally Sharanya , Wadde Kavita Ramesh , Ganesan Shrijha , Khaire Samir Dashrath
Published: February 2024

Granular cell tumour also called as Arbikoss off tumour, because it is first reported by Arbikossoff in 1926. It is a rare soft tissue benign neoplasm. Mostly affecting women more than men in the 4 to 6 decades of life, with 70% occurring on dorsum of tongue and 5% involving the buccal mucosa also include other sites like gingiva, hard palate, lips. The clinical presentation of lesion mimics malignant oral squamous cell carcinoma hence a thorough clinical examination and prompt management is necessary. Hereby we present a uncommon case of granular cell tumour involving the right buccal mucosa. Its surgical excision, and closure with collagen membrane including follow up.
Nicaragua: generando impacto para mejorar vidas: resultados recientes en proyectos de acceso a salud y energia de poblaciones vulnerables financiados por el grupo BID
Authors:   Banco Interamericano de Desarrollo,   BID Invest,   BID Lab
Published: February 2024

Las zonas más apartadas y vulnerables de Nicaragua han sido particularmente afectadas por la falta de acceso a servicios de salud y al suministro de energía eléctrica. Ambos son desafíos en los que se ha venido trabajando, con apoyo del Grupo BID, para ofrecer mejores condiciones de vida a las personas. Este documento recoge, de manera breve, algunos de los datos más destacados al respecto, desde la mejor cobertura en materia de atención médica y una importante reducción en las muertes materno-infantiles, hasta el aumento en la cobertura eléctrica a partir de fuentes renovables de energía.
República Dominicana: generando impacto para mejorar vidas: resultados recientes en proyectos de energía financiados por el grupo BID
Authors:   Banco Interamericano de Desarrollo,   BID Invest,   BID Lab
Published: February 2024

Se han puesto en marcha varias iniciativas para que República Dominicana empiece a transitar por la senda de las energías limpias. Con apoyo del Grupo BID, a través de iniciativas que ya están en ejecución, el país prevé un incremento en las fuentes renovables de su matriz energética. Entre tanto, se ha avanzado en hacer más eficiente el suministro de electricidad y se ha dado un primer paso en materia de electromovilidad, con un proyecto que puede servir de referente para el resto de la región, reemplazando motocicletas de combustión por eléctricas. Este documento recoge información al respecto, con logros ya alcanzados, desde mejoras en la calidad del servicio eléctrico hasta reducción de la polución y de la contaminación auditiva.
BIDeconomics El Salvador: panorama de oportunidades
Authors: Contreras Diana , Ochoa Elizabeth , Zentner Joaquín
Published: February 2024

El Salvador continúa superando desafíos estructurales en su camino hacia el desarrollo. Entre 2019 y 2022, la economía mostró un crecimiento promedio modesto del 2,1%, destacando barreras como baja productividad, inversión limitada y debilidades institucionales. Si bien en 2022 el crecimiento alcanzó el 2,6%, sigue siendo bajo en comparación con países pares. El entorno actual ofrece oportunidades, y para capitalizarlas, el país debe entre otras cosas, consolidar sus finanzas, recuperar la sostenibilidad de la deuda al mismo tiempo que se protege la inversión pública, fortalecer el Estado de derecho e impulsar la inversión y otras fuentes de crecimiento como el turismo. Para lograr un crecimiento inclusivo, es crucial la productividad empresarial con inversiones en infraestructura resiliente, mejorar la regulación y el clima de negocios, así como desarrollar el capital humano. Además, se subraya la importancia de la transformación digital para mejorar la eficiencia gubernamental y abordar las necesidades de grupos vulnerables, promoviendo la resiliencia climática y la protección social.
OTHER-INITIATED INTERACTIONS THAT CONTRIBUTE TO RESILIENT OUTCOMES AMONG YOUNG ADULTS RAISED BY CAREGIVERS WHO MISUSE ALCOHOL
Authors: Mushonga Simbai , Van Breda Adrian D.
Published: February 2024

This study offers an understanding of interactional resilience processes between young adults raised by caregivers who misused alcohol and people in their social-ecology who initiated supportive interactions that enabled them to achieve better-than-expected outcomes. Multiple in-depth face-to-face interviews and a draw-and-write methodology were used with 15 National University of Lesotho undergraduate students raised by caregivers who misused alcohol. An interactional resilience approach, building on person-in-environment and social-ecology perspectives on resilience, informed this study. Using constructivist grounded theory methods of data analysis, three themes were formulated: (a) other-initiated material support that elicits a response of resolve or obligation towards the other; (b) other-initiated sustained emotional support that elicits a response of hope for the future; and (c) other-initiated challenging support that elicits a change in behaviour. Given these findings, the study recommends that child and youth workers and social workers cultivate enabling and support-initiating social environments in key contexts such as schools, churches, and clubs, and develop children and young people’s skills to respond to and receive such support.
“LI KA FE’L TOU” : THE INFLUENCE OF AN EDUCATIONAL TELEVISION PROGRAM ON HAITIAN CHILDREN’S GENDER BELIEFS
Authors: Borzekowski Dina L.G. , Mondestin Tanesha , St-Onge Ahmad Sacha
Published: February 2024

This study examined whether an educational television show would affect young Haitian children’s gender perceptions. We first collected data on children’s beliefs about male and female characteristics and roles. Among 862 participating 6- and 7-year-olds from urban, peri-urban, and rural settings, we saw gender stereotypical beliefs about activities, traits, and occupations. We conducted a school-based intervention over a 10-week period, in which children were randomly assigned to watch a children’s television program in either of two groups: one that watched Lakou Kajou or one that watched Dora the Explorer. Each group saw 21 episodes of its assigned show, spread over 3 screenings of 7 episodes each. Lakou Kajou is an educational television show created in Haiti that purposely incorporates overt counter-stereotypical gender messaging. Among those children who watched Lakou Kajou and recalled more characters from the show, beliefs around gender became less stereotypical. In countries like Haiti, where pronounced gender disparities and biases exist, it is encouraging to see that a locally produced educational television show can change beliefs.
Experimental Assessment of Predictive Current Control Applied to Induction Machine Drive Systems Operating Under Single-Phase Open-Circuit Fault
Authors: Oliveira Liane M. de , Melo Victor F. M. B. , Da Paz Gilielson F. , Rocha Filipe V. , Fabrício Edgard L. L.
Published: February 2024

Predictive Current Control (PCC) has been widely applied in several applications. However, the literature has not discussed its use as a fault tolerance control algorithm in induction drive systems. In this way, this paper discusses the PCC method in two faulttolerant squirrel-cage induction machine drive systems operating under single-phase open-circuit faults. PCC’s postfault performance is compared to Field Oriented Control (FOC) for different steady- and transient-state scenarios, analyzing harmonic distortion, torque ripple, and the transition from healthy to postfault operation. Also, experiments tested the robustness of postfault PCC to low-speed operation, parametric variation, and a step change in reference rotor speed, showing that PCC also presents fault-tolerant operation under these conditions.
Using IUCN Best Practice Principles to Evaluate National Park Management: A Zambia Case Study
Authors: Holland John , Farrelly Trisia , Mwape Ackim
Published: February 2024

Over the last three decades, a series of best practice principles have been advanced by the International Union for the Conservation of Nature (IUCN) to guide national park management policy and practice. This study investigates how these best practice principles have informed the management of Zambia’s national parks. We performed qualitative and quantitative thematic content analysis on 23 park management documents and found that, for the most part, the reported performance of Zambia’s national parks is not well aligned with IUCN best practice principles. We argue that improved alignment with IUCN principles can provide a realistic and positive foundation to increase opportunities for national parks to meet their local and international conservation goals. Improved data collection, along with meaningful public access to information will enhance decision making and public participation in national park management. Strengthened public participation will ensure consideration of multiple perspectives and adoption of processes that enable national park authorities to address conservation challenges that span socio-ecological boundaries. Improved capacity building will provide the necessary technical skills and knowledge to ensure effective coordination and implementation. The results show that park management plans are duly submitted with little expectation of implementing them. More often than not, performance reality does not match policy rhetoric. The study highlights the urgent need for national park management to articulate clear goals and action steps with mechanisms to implement them.
Estudantes Universitárias (os) Opinam sobre as Motivações do Sexting. A Busca por Contingências Culturais
Authors: Souza Fabrício de , Neves Ana Barbara Vieira Sinay
Published: February 2024

Analisando opiniões de estudantes universitárias (os) sobre as motivações para a prática do sexting, esta pesquisa investigou a ocorrência de contingências entrelaçadas e seus efeitos no compartilhamento de conteúdos eróticos pessoais. Participaram deste estudo 100 pessoas (65 mulheres, 33 homens e 02 não binárias), que responderam um questionário semiaberto sobre as motivações para o sexting. As respostas foram submetidas à análise de conteúdo para a verificação dos temas principais nelas contidos. Posteriormente, nessas respostas foram identificados os antecedentes e as consequências do sexting. A análise de conteúdo mostrou dois eventos motivacionais mais citados: estimulação sexual e relação interpessoal. As respostas de 08 participantes contiveram 09 descrições de contingências completas que foram analisadas e apresentaram elementos que as caracterizaram como macrocontingências. As contingências observadas nos contextos de estimulação sexual e de relação interpessoal indicam a necessidade da educação sexual para que a vivência da sexualidade em tempos de comunicação tecnologicamente mediada aconteça de maneira mais consciente das possibilidades e dos riscos envolvidos. Foi discutida a importância da intervenção baseada no conhecimento das contingências que caracterizam a prática cultural do sexting.
Can ethnic disparities in sentencing be taken as evidence of judicial discrimination?
Authors: Pina Sanchez Jose , Geneletti Sara , Veiga Ana , Morales Ana , Guilfoyle Eoin
Published: February 2024

Large research efforts have been directed at the exploration of ethnic disparities in the criminal justice system, documenting harsher treatment of minority ethnic defendants, across offence types, criminal justice decisions, and jurisdictions. However, most studies on the topic have relied on observational data, which can only approximate ‘like with like’ comparisons. We use causal diagrams to lay out explicitly the different ways estimates of ethnic disparities in sentencing derived from observational data could be biased. Beyond the commonly acknowledged problem of unobserved case characteristics, we also discuss other less well-known, yet likely more consequential problems: measurement error in the form of racially-determined case characteristics or as a result of disparities within the ‘Whites’ reference group, and selection bias from non-response and missing offenders’ ethnicity data. We apply such causal framework to review findings from two recent studies showing ethnic disparities in custodial sentences imposed at the Crown Court (England and Wales). We also use simulations to recreate the most comprehensive of those studies, and demonstrate how the reported ethnic disparities appear robust to a problem of unobserved case characteristics. We conclude that ethnic disparities observed in the Crown Court are likely reflecting evidence of direct discrimination in sentencing.
Effects of anxiety, visual target predictability and pain on gaze behavior during a visuomotor task
Authors: Leopoldo Maysa P. G. , Meira Junior Cassio M. , Silva Renata M. , Rodeguer Carlos E. B. , Goethel Marcio , Magalhães Fernando H. , Ervilha Ulysses F.
Published: February 2024

BACKGROUND: Attention and cognitive effort during postural control can be influenced by under threatening situations, such as pain, particularly in anxious individuals when visually tracking a target.
AIM: This study aimed to investigate the effects of anxiety, visual target type, and acute lumbar muscle pain on gaze behavior during a visual pursuit/postural control task.
METHOD: Nine young adult participants underwent testing over three time periods: (1) pre-infusion, (2) intramuscular (multifidus muscles) infusion of hypertonic (acute pain)/isotonic (placebo) solution, and (3) post-infusion (after 40 minutes after pain is vanished). The two sessions were separated by one week, in a counterbalanced order. During each session, participants performed a postural control task with visual pursuit, focusing on three targets (fixed, stochastic, and deterministic - 3 trials per target) while wearing an eye-tracker. STAI/IDATE was used to assess the participants' level of state anxiety: n=4 high-anxious and n=5 low-anxious. Continuous time of gaze on target (CTGT) and pupil diameter variability (PDV) were grouped into blocks of 3 trials.
RESULTS: High-anxious participants exhibited greater variability in PDV during the infusion period. The deterministic target required less visual attention (shorter CTGT) compared to the fixed and stochastic targets. Both injected solutions (hypertonic and isotonic) had similar effects on CTGT and PDV.
CONCLUSION: During the postural control task with visual pursuit: (1) high-anxious participants exerted greater cognitive effort, (2) participants deflected visual attention on the deterministic target, (3) acute and placebo muscle pain did not affect visual attention and cognitive effort.
Editorial: Fatigue Role in Modulating Motor Skills and Muscular Responses
Authors: Bedo Bruno L. S. , Kalva-Filho Carlos A.
Published: February 2024

This editorial beckons readers to the intricate relationship between fatigue and motor control skills. This theme is explored in the ensuing special issue through the lens of esteemed researchers in the field. The articles within this issue provide a comprehensive and insightful analysis of how fatigue acts as a silent saboteur, subtly undermining the efficiency and efficacy of motor responses and skills. Through a tapestry of carefully conducted studies and thought-provoking findings, contributors shed light on how fatigue insidiously affects neuromuscular responses, from altering muscle activation during specific tasks to influencing the onset of muscle soreness. This special issue, therefore, serves as a launching pad for a much-needed research agenda. It invites scholars and practitioners alike to engage with and further investigate the relationship between fatigue and motor control skills, thereby contributing to our growing understanding and knowledge of this pivotal area.
Power Efficiency Optimization and Enhanced Connectivity for Wireless Sensor Networks with the Fuzzy C-Means 3D Model
Authors: Le Dinh Phu Cuong , Wang Dong , Tu Nguyen Hoang
Published: February 2024

Wireless Sensor Networks are critical for modern applications ranging from environmental monitoring to smart city infrastructures. This research proposes a novel optimization learning and deployment strategy for Wireless Sensor Networks (WSNs) by 3D WUSN model is uniformly distributed M sensor nodes across diverse terrains, with clusters representing 20% of sensors, showcasing its ability to balance power consumption and extend network longevity, grounded in fuzzy clustering based protocol using the Fuzzy C-Means (FCM) method, called FCM-3DWUSN. Comparative analysis against established models including LEACH-C, K-Means and LEACH emphasized FCM-3DWUSN's outperformed performance, with average power consumption such as 134.990, 341.790, 143.895, and 192.984; respectively. The experimental result shows that FCM protocol in the 3D WUSN model can reduce energy consumption and improve the network lifetime to gather data and send the information.
Development of Chitosan Membrane Reinforced With Hydroxy-Apatite Derived From Pterygoplichthys spp (Armored Catfish)
Authors: Luna-Domínguez Jorge Humberto , Mendoza-Martínez Ana María , Câmara-Cozza Ronaldo , Anzures-Mendoza Ana Carolina
Published: February 2024

Abstract: Nowadays, there is an increasing interest in the development of novel bioresorbable membranes for Guided Bone Regeneration (GBR). Hydroxyapatite of different resources in com-bination with chitosan has been used successfully. In this work, armored catfish (Pterygoplich-thys spp) bone as a source of hydroxyapatite is proposed; it was isolated through bone calcina-tion at a temperature of 1000 °C. The hydroxyapatite obtained was analyzed for its chemical composition by means of Energy Dispersive Spectroscopy (EDS), its functional groups by Fouri-er Transform Infrared Spectroscopy (FT-IR), its crystallographic structures were analyzed by X-ray diffraction (DRX) and Scanning electron microscopy (SEM) was used to observe the mor-phology of the particle. The composed membrane presents a major roughness morphology sur-face than the pristine chitosan membrane. The hydroxyapatite particles added to the polymeric matrix increased the mechanical tensile properties of the membrane. These findings confirm that armored catfish bones are a viable, economic, and environmentally friendly source of hydroxy-apatite, which combined with chitosan, is a suitable alternative to develop biocompatible GBR membranes after it is combined with chitosan.
Use of Telehealth Information for Early Detection: Insights From the COVID-19 Pandemic
Authors: Haenchen Steven , McCabe Bridget , Mack Wendy J. , Doctor Jason N. , Linder Jeffrey A. , Persell Stephen D. , Tibbels Jason , Meeker Daniella
Published: February 2024

Objectives. To examine whether the addition of telehealth data to existing surveillance infrastructure can improve forecasts of cases and mortality.

Methods. In this observational study, we compared accuracy of 14-day forecasts using real-time data available to the National Syndromic Surveillance Program (standard forecasts) to forecasts that also included telehealth information (telehealth forecasts). The study was performed in a national telehealth service provider in 2020 serving 50 US states and the District of Columbia.

Results. Among 10.5 million telemedicine encounters, 169 672 probable COVID-19 cases were diagnosed by 5050 clinicians, with a rate between 0.79 and 47.8 probable cases per 100 000 encounters per day (mean = 8.37; SD = 10.75). Publicly reported case counts ranged from 0.5 to 237 916 (mean: 53 913; SD = 47 466) and 0 to 2328 deaths (mean = 1035; SD = 550) per day. Telehealth-based forecasts improved 14-day case forecasting accuracy by 1.8 percentage points to 30.9% ( P = .06) and mortality forecasting by 6.4 percentage points to 26.9% ( P < .048).

Conclusions. Modest improvements in forecasting can be gained from adding telehealth data to syndromic surveillance infrastructure. ( Am J Public Health. 2024;114(2):218–225. https://doi.org/10.2105/AJPH.2023.307499 )
Распространение вариантов вируса SARS-COV-2, вызывающих интерес (VOI) и находящихся под наблюдением (VUM), на основе количества их геномов, депонированных в базу данных GISAID за неделю с 3 по 9 февраля 2024 г.
Authors: Дмитриева Людмила , Краснов Ярослав , Чумачкова Елена , Осина Наталья , Зимирова Анастасия , Иванова Александра , Карнаухов Игорь , Караваева Татьяна , Щербакова Светлана , Кутырев Владимир
Published: February 2024

В обзоре представлена информация по циркулирующим в настоящее время вариантам вируса SARS-COV-2 Omicron вызывающих интерес (VOI) и находящихся под наблюдением (VUM), геномные последовательности которых размещены в международной базе данных GISAID за неделю с 3 по 9 февраля 2024 г.
Cambios a nivel dental y periodontal entre dientes adyacentes post-tracción ortodóncica de caninos maxilares impactados: una revisión de literatura
Authors:   , Zorrilla Mattos Ana Carolina
Published: February 2024

Objetivo: Evaluar los cambios a nivel dental y alveolar que se dan en dientes adyacentes post-tracción ortodóncica de caninos maxilares impactados. Materiales y métodos: Cuatro bases de datos fueron revisadas hasta enero de 2023 (Pubmed, Scopus, Science Direct y Embase) con la calidad metodológica analizada usando PRISMA checklist. Dos revisores independientes seleccionaron estudios que reportaron reabsorción radicular y disminución en el nivel del hueso alveolar de incisivos centrales, incisivos laterales y primeras premolares superiores en pacientes que recibieron tracción ortodóncica en algún canino maxilar impactado visto mediante tomografías (CBCT). Resultados: En cinco artículos evaluados en población peruana y brasileña, hubo un efecto mínimo no estadísticamente significativo en el cambio de la longitud radicular de los incisivos centrales, incisivos laterales y primeras premolares superiores. Sólo en la población iraní se observó un cambio significativo en la reabsorción radicular en volumen de los incisivos laterales. Con respecto al nivel del hueso alveolar, también hubo un cambio mínimo, sobretodo en incisivos centrales y laterales superiores, pero no fue significativo. Además, al evaluar la diferenciación de cambios según el sexo, los varones tuvieron mayor reabsorción radicular que las mujeres en incisivos centrales superiores. Discusión: No se encontraron cambios estadísticamente significativos a nivel dental y alveolar en los dientes adyacentes a los caninos maxilares impactados en poblaciones peruana y brasileña debido a que los tratamientos utilizados tratan de conservar la integridad de las raíces. Sólo la población iraní obtuvo un cambio significativo en grupo experimental que usaron un ATP como anclaje en vez de DAT’s.
Resistencia flexural de las resinas fluida convencional, fluida bulk fill y fluida de alta carga: estudio in vitro
Authors:   , Sulca Gonzales Edith Liliana
Published: February 2024

OBJETIVO: Evaluar y comparar la resistencia flexural de las resinas fluida convencional, fluida bulk fill y fluida de alta carga. MATERIALES Y MÉTODOS: Se confeccionaron treinta especímenes de 2mm x 2mm x 25mm de las resinas fluidas Tetric N-Flow (TNF), Filtek Bulk Fill Flowable Restorative (FBF) y Beautifil Flow Plus F00 (BFP); se distribuyeron en tres grupos de acuerdo con la marca (n=10) y fueron almacenadas por 24 horas a 37◦C en agua destilada. Según la regulación ISO 4049, se llevó a cabo la evaluación de flexión de 3 puntos en un aparato de ensayos universales con 0,5 mm/min de velocidad hasta que se fracture. Se analizaron los resultados mediante pruebas de ANOVA y Tukey. P<0.05. RESULTADOS: Se registraron disparidades estadísticamente significativas entre los grupos, valor de p=0.011. Los grupos que mostraron discrepancias estadísticamente significativas fueron los grupos BFP y TNF (p=0.015) y los grupos BFP y FBF (p=0.035), mientras que entre los grupos TNF y FBF no se encontró discrepancia estadísticamente significativa. CONCLUSIÓN: La resina fluida de alta carga presenta mejor resistencia flexural comparada con las resinas fluida convencional y fluida bulk fill, mientras que las resinas fluidas convencional y bulk fill no tienen diferencia estadísticamente significativa.
Pronóstico del rendimiento y volatilidad del Mercado de Valores Peruano mediante anuncios de cifras y búsquedas en Google sobre el Covid-19
Authors:   , Rojas Flores Juan Carlos , Roque Merma Frank Clever
Published: February 2024

El objetivo de esta investigación es determinar cómo la preocupación por el COVID-19, la información disponible sobre su evolución y las medidas para enfrentarlo afectaron el pronóstico del rendimiento y la volatilidad diaria del mercado de valores peruano. La preocupación o interés por el COVID-19 se mide a través del índice del volumen de búsquedas de Google de palabras relacionadas al COVID-19 e índices de sentimiento, mientras que la información disponible se mide a través de los anuncios de cifras de muertes e infectados y políticas de restricción social relacionadas con el COVID-19. A través de la estimación de modelos uniecuacionales GARCH-TARCH, se encuentra que las búsquedas de palabras en Google y el anuncio de la tasa de muertes han contribuido en la predicción del rendimiento y volatilidad del índice bursátil en el Perú.
Gestión logística y su influencia en la satisfacción de los usuarios en los centros de distribución de las empresas del sector retail, distrito de Villa el Salvador (Lima-Perú), 2022
Authors:   , Gutierrez Llaccta Hubertson
Published: February 2024

El propósito de esta investigación fue especificar la influencia de la gestión logística en la satisfacción de los usuarios en el sector retail, distrito de Villa El Salvador, 2022. El diseño de nuestro estudio fue observacional, transversal, correlacional, con un enfoque cuantitativo y alcance explicativo. Se incluyó a la totalidad de colaboradores (30 participantes) a los cuales se aplicó una encuesta que fue validada mediante alfa de Cronbach (0,836 para “gestión logística” y 0,842 para “satisfacción de usuario”). Por la naturaleza no paramétrica de las variables, se determinó su asociación mediante la regresión curvilínea. Con esta prueba se demostró que había asociación entre las variables (coeficiente de 0,655); por ello, se confirmó que hay una influencia moderada, directa y significativa entre la gestión logística y la satisfacción del usuario.
Evaluación de dos servicios ecosistémicos brindados por la población de Pistia stratiotes en el humedal Santa Rosa, Chancay-Lima
Authors:   , Zamora Aranda Adela Brillyt
Published: February 2024

En el Perú, uno de los humedales más interesantes en la costa central es el humedal de Santa Rosa (Chancay, Lima), un ecosistema amenazado por las actividades antropogénicas que se desarrollan a su alrededor lo cual ha ocasionado el crecimiento descontrolado de Pistia stratiotes, una planta acuática considerada invasora, pero con diversas alternativas de uso. Este estudio buscó cuantificar servicios ecosistémicos de regulación y de aprovisionamiento brindados por esta planta usando como indicadores el almacenamiento de carbono y la provisión de biomasa para forraje respectivamente. Para ello, se pesó y georreferenció la biomasa de 50 parcelas de 0.0625m2; se cuantificó el porcentaje de biomasa seca (%S) y de carbono orgánico total en la biomasa (%C). La biomasa y sus coordenadas fueron ingresadas en ArcGis y se aplicó la técnica de interpolación kriging para determinar la cantidad de biomasa total (B). P. stratiotes almacena 3 942.57 tCO2 y se puede obtener 2 132.41 toneladas de biomasa para forraje. El carbono total almacenado representa un 28.46% del carbono total presente en el humedal. Esta investigación comprende la primera estimación de la biomasa de una población vegetal acuática flotante en un humedal de la costa peruana.
Análisis del efecto de la refrigeración a las 0, 24 y 48 horas sobre la viabilidad espermática del semen de sementales de la línea Zangersheide
Authors:   , Sanchez Quispe Ana Paola
Published: February 2024

Durante la refrigeración del semen, los espermatozoides alteran sus características funcionales al ser mantenidos a una temperatura distinta a la corporal. Por lo tanto, es necesario evaluar la influencia del tiempo de refrigeración sobre los parámetros de calidad espermática. Es por ello que el objetivo de este trabajo es analizar el efecto del tiempo de la refrigeración a las 0, 24 y 48 horas sobre la viabilidad espermática del semen de sementales de la línea Zangersheide. Se evaluaron 15 eyaculados de sementales de la línea Zangersheide pertenecientes a la base Las Palmas del Ejército peruano. La viabilidad seminal fue evaluada con la tinción Eosina - Nigrosina. El porcentaje de viabilidad espermática en los tres tiempos fue 53.13 ± 8.28 %, 46.70 ± 7.98 % y 27.63 ± 8.16 %, correspondientes a los tiempos de refrigeración 0, 24 y 48 horas respectivamente, existiendo una disminución significativa (p < 0.001) entre los tres grupos. Se puede concluir que, para el conjunto de sementales de la Línea Zangersheide, existe un efecto del tiempo de refrigeración sobre la viabilidad espermática.
Vitamin D supplementation in polycystic ovary syndrome: a randomized open label delayed-start design: study protocol
Authors: Khan Aysha Habib , Khan Unab , Khan Haq Nawaz , Zahid Nida , Rehman Rehana
Published: February 2024

Abstract: Background: Polycystic Ovary Syndrome (PCOS) is a prevalent endocrine disorder affecting reproductive-aged women, characterized by a constellation of symptoms including irregular menstrual cycles, hyperandrogenism, and insulin resistance. Emerging evidence suggests that Vitamin D (VD) deficiency may play a pivotal role in the pathogenesis of PCOS, with low VD levels associated with exacerbation of PCOS-related symptoms and metabolic disturbances. Recently, VD supplementation has garnered increasing attention as a potential therapeutic intervention for PCOS.
Methods: In this randomized open label delayed-start design the intervention group will be given a VD injection of 600,000 I.U I/M once with 1-gram calcium supplement daily for 12 weeks, followed by standard PCOS care which will include: i) ‘Glucophage XR 750 mg’ (once for 15 days then twice daily), ii) progesterone supplementation (1 capsule Progeffik 100 mg every 3 weeks, then 1 week off), with continued calcium supplements for next 12 weeks. Women in the control group will begin with standard PCOS treatment (as above) for 12 weeks, followed by VD and calcium supplementation for the remaining 12 weeks. Blood tests will be done at baseline, week-12 and week-24 between the two groups that will include assessment of: i) hyperandrogenism by ‘Free Androgen Index’ [Total Testosterone, Steroid Hormone Binding Globulin ii) Insulin resistance (IR) by HOMA-IR (serum Insulin, Fasting Blood Glucose) and iii) oxidative stress by Total Antioxidant Capacity at all three levels for comparative analysis. VD levels after supplementation will be assessed for confirmation of correction and calcium and albumin levels for detection of hypercalcemia.
GIS Modeling of Nyiragongo’s Lava Flow Inundation Probability And Mazuku : A Spatial Environment for a Successful Evacuation Plan for Goma City.
Authors: MUHAMBYA KATYA , CHAUBEY NIRBHAY K. , KASEREKA SELAIN K. , MULONDI KAYITOGHERA G.
Published: February 2024

The densely populated city of Goma in the Democratic Republic of Congo is highly vulnerable to volcanic hazards from the Nyiragongo volcano. However, these threats are not taken into account in land use and urban planning. In fact, a contingency plan for evacuating people in the event of a volcanic disaster cannot be successful if the evacuation environment is not known and properly simulated, as it may change over time. Based on the Mazuku distribution map and lava flow inundation probabilities, this study aimed to suggest the possible evacuation scenarios from the drown up models. The Q-LavHA tools were used to simulate the lava flow from 8 selected vents on the flank of Nyiragongo towards the city of Goma, using data from past eruptions in 1977, 2002 and 2022. Thus, based on certain volcanic hazard criteria related to the dataset analysis, the exposure to hazards was assessed. The result shows that more than half of the city of Goma is highly exposed to the volcanic hazards of Nyiragongo. Unfortunately, this is also where the majority of the population, the commercial centre and the main public and private institutions are located. Therefore, taking into account the level of exposure to mazuku and lava flows, a spatial evacuation environment that could support a successful evacuation was proposed. This environment is essential for a spatially explicit agent-based simulation study.