bluuebunny/crossref_metadata_2025 huggingface dataset:
Allylic Epoxides Increase the Strain Energy of Cyclic Olefin Monomers for Ring-Opening Metathesis Polymerization
Authors: Sylvester Kyle , Zovinka Jessa , Milrod Maya , Stubin Alexandra , Rojas-Merchan Angela , Alexander Kayla , Elling Benjamin
Published: July 2024

Ring-opening metathesis polymerization (ROMP) is an effective method for synthesizing high molecular weight, functional polymers, but the technique is limited by its reliance on high ring strain cyclic olefins. As a result, the most common monomers are norbornene derivatives. The reliance on this one molecular framework for efficient ROMP of functionalized materials limits the obtainable properties of ROMP polymers. In this work, we investigate new bicyclic monomers synthesized via epoxidation of commercial dienes. DFT esti-mates of these monomers’ ring strains suggests a particular increase in strain for cyclic olefins containing allylic epoxides. We found that the eight-membered (COO) and five-membered (CPO) cyclic olefins were particularly effective for ROMP. CPO was of especially intriguing due to its excellent polymerizability when compared to the limited reactivity of other five-membered rings. The resulting pol-ymers of both monomers displayed Tgs well below room temperature. Interestingly, poly(3,4-COO) showed both high stereo- and regioregularity while poly(CPO) showed little regularity. Both polymers could be readily modified via post-polymerization ring-opening of the reactive allylic epoxides. With the advantages of high epoxide density in poly(CPO), we see CPO as an exciting new ROMP mon-omer that is easily synthesized, can be polymerized to high conversion at room temperature, and may be facilely modified to yield a wide range of functional materials.
The Role of sp3 Defects in Eliciting Divergent Fluorescence Response of Single-Walled Carbon Nanotubes to Dopamine and Serotonin
Authors: Basu Srestha , Hendler-Neumark Adi , Bisker Gili
Published: July 2024

Modulating the optical response of fluorescent nanoparticles through rational modification of their surface chemistry can yield distinct optical signatures upon the interaction with compositionally analogous molecules. Herein, we present a novel method for tuning the fluorescence response of single-walled carbon nanotubes (SWCNTs) towards dopamine (DA) and serotonin, two compositionally similar monoamine-hydroxylated aromatic neurotransmitters, by introducing oxygen defects into (6,5) chirality-enriched SWCNTs suspended by sodium cholate (SC). This modification facilitated opposite optical responses towards these neurotransmitters, where DA significantly increased the fluorescence of the defect-induced SWCNTs (D-SWCNTs) six-fold, while serotonin notably decreased it. In contrast, pristine, defect-free SWCNTs exhibited similar optical responses to both neurotransmitters. The underlying mechanisms for the divergent fluorescence response were found to be polydopamine (PDA) surface adsorption in the case of DA’s fluorescence enhancement, while serotonin’s fluorescence decrease was attributed to enhanced solvent relaxation effects in the presence of defects. Importantly, the divergent optical response between DA and serotonin by D-SWCNTs via the introduction of defects was validated in complex biological environments, such as serum. Further, the generality of our approach was confirmed by the successful demonstrations of a divergent fluorescence response of D-SWCNT suspended by an additional dispersant, namely lipid–polyethylene glycol (PEG). This study offers promising avenues for the broad applicability of tailored surface functionalization of SWCNTs to achieve divergent responses towards compositionally similar molecules and advance innovative applications in sensing, imaging, and diagnostic technologies.
Key Developments in Magnesiothermic Reduction of Silica: Insights into Reactivity and Future Prospects
Authors: Yan Maximilian , Martell Sarah , Patwardhan Siddharth , Dasog Mita
Published: July 2024

Porous Si (p-Si) nanomaterials are an exciting class of inexpensive and abundant materials within the field of energy storage. Specifically, porous Si has been explored in battery anodes to improve charge storage capacity, to generate clean fuels through photocatalysis and photoelectrochemical processes, for the stoichiometric conversion of CO2 to value added chemicals, and as a chemical H2 storage material. p-Si can be made from synthetic, natural, and waste SiO2 sources through a facile and inexpensive method called magnesiothermic reduction (MgTR). This yields a material with tunable properties and excellent energy storage capabilities. In order to tune the physical properties that affect performance metrics of p-Si, a deeper understanding of the mechanism of the MgTR and factors affecting it is required. In this perspective, we review the key developments in MgTR and discuss the thermal management strategies used to control the properties of p-Si. Additionally, we explore future research directions and approaches to bridge the gap between laboratory-scale experiments and industrial applications.
Intermolecular Bending States and Tunneling Splittings of Water Trimer from Rigorous 9D Quantum Calculations: I. Methodology, Energy Levels, and Low-Frequency Spectrum
Authors: Felker Peter M. , Simkó Irén , Bačić Zlatko
Published: July 2024

We present the computational methodology that enables the first rigorous nine-dimensional (9D) quantum calculations of the intermolecular bending states of the water trimer, as well as its low-frequency spectrum for direct comparison with experiment. The water monomers, treated as rigid, have their centers of mass (cm's) at the corners of an equilateral triangle, and the intermonomer cm-to-cm distance is set to a value slightly larger than that in the equilibrium geometry of the trimer. The remaining nine strongly coupled large-amplitude bending (angular) degrees of freedom (DOFs) enter the 9D bend Hamiltonian of the three coupled 3D rigid-water hindered rotors. Its 9D eigenstates encompass excited librational vibrations of the trimer, as well as their torsional and bifurcation tunneling splittings which have been the subject of much interest. For this reason, the calculation of these eigenstates by diagonalizing the 9D bend Hamiltonian represents the most rigorous high-dimensional quantum treatment to date of the intermolecular vibrational states of the water trimer and its excited-state tunneling splittings. Such calculations are extremely demanding, and a sophisticated computational scheme is developed that exploits the molecular symmetry group of the water trimer, G48, in order to make them feasible in a reasonable amount of time. The spectrum of the low-frequency vibrations of the water trimer simulated using the eigenstates of the 9D bend Hamiltonian agrees remarkably well with the experimentally observed far-infrared (FIR) spectrum of the trimer in helium nanodroplets over the entire frequency range of the measurements from 70 to 620 cm−1. This shows that most peaks in the experimental FIR spectrum are associated with the intermolecular bending vibrations of the trimer. Moreover, the ground-state torsional tunneling splittings from the present 9D calculations are in excellent agreement with the spectroscopic data. These results demonstrate the high quality of the ab initio 2+3-body PES employed for the DOFs included in the bound-state calculations.
A multi-agent-driven robotic AI chemist enabling autonomous chemical research on demand
Authors: Song Tao , Luo Man , Chen Linjiang , Huang Yan , Zhu Qing , Liu Daobin , Zhang Baicheng , Zou Gang , Zhang Fei , Shang Weiwei , Jiang Jun , Luo Yi
Published: July 2024

The successful integration of large language models (LLMs) into laboratory workflows has demonstrated robust capabilities in natural language processing, autonomous task execution, and collaborative problem-solving. This offers an exciting opportunity to realize the dream of autonomous chemical research on demand. Here, we report a robotic AI chemist powered by a hierarchical multi-agent system, ChemAgents, based on an on-board Llama-3-70B LLM, capable of executing complex, multi-step experiments with minimal human intervention. It operates through a Task Manager agent that interacts with human researchers and coordinates four role-specific agents—Literature Reader, Experiment Designer, Computation Performer, and Robot Operator—each leveraging one of four foundational resources: a comprehensive Literature Database, an extensive Protocol Library, a versatile Model Library, and a state-of-the-art Automated Lab. We demonstrate its versatility and efficacy through six experimental tasks of varying complexity, ranging from straightforward synthesis and characterization to more complex exploration and screening of experimental parameters, culminating in the discovery and optimization of functional materials. Our multi-agent-driven robotic AI chemist showcases the potential of on-demand autonomous chemical research to drive unprecedented efficiencies, accelerate discovery, and democratize access to advanced experimental capabilities across academic disciplines and industries.
Electrochemical control with high spatiotemporal resolutions for extracellular pH microenvironment
Authors: Wang Jingyu , Xie Yongchao , Chen Yi , Zou Haiyuan , Liu Chong
Published: July 2024

Most microorganisms grow in assemblages with chemical gradients that influence, and are influenced by, metabolism. pH gradient plays an important role in various metabolism processes. Understanding the effects of the pH gradient on metabolism and regulation within microbial assemblages is important for microbial physiology. However, the complexity of the microbial environment makes it hard to decouple the effect of the pH gradient from other species. Therefore, an artificial pH gradient is required to reveal the correlation of the pH gradient and microbial physiology. Here, we demonstrated a controllable pH gradient plate by using electrochemical proton coupled electron transfer reaction based on interdigital electrodes. The morphology design of the interdigital electrodes enables a pH gradient at the level of 10 micrometers, which was demonstrated under confocal microscope with a resolution of 1 micrometer. The electrochemical system also achieved a fast time response of ten seconds. In summary, this platform provided a flexible pH gradient with a high spatial and temporal resolution.
An empirical analysis of the dynamics of tax revenue determinants in kenya: A longitudinal approach
Authors: Otieno Benard
Published: July 2024

The volatility of tax income poses a significant challenge for Sub-Saharan African countries, contributing to erratic public spending and hindering sustainable economic progress. Recent global economic crises have underscored the urgency for these nations to bolster local revenue sources and overcome structural barriers to economic development. This paper examines the factors influencing tax revenue in Kenya over 39 years, from 1984 to 2022. Utilizing data from various sources, including the World Bank's World Development Indicators (WDI), the Kenya Revenue Authority (KRA), the Central Bank of Kenya (CBK), and the Organization for Economic Co-operation and Development (OECD), the study employs an autoregressive distributed lag (ARDL) model to distinguish long-run relationships from short-run dynamics due to the mixed order of integration among variables. The empirical model includes real GDP, agricultural gross value added, general government expenditure, inflation, consumer price, official development assistance, and industrial gross value added as key determinants. The ARDL bounds test confirms a long-term equilibrium. The connection between the variables and the error correction model indicates a relatively quick adjustment process, with around 25% of disequilibrium corrected within a single period. Results from the long-run ARDL estimation suggest that agricultural value added significantly increases tax revenue. In contrast, variables such as GDP and government expenditure do not show a significant long-term effect. In the short run, the lagged tax-to-GDP ratio and GDP significantly impact tax revenue. These findings underscore the importance of agricultural productivity and provide valuable insights for policymakers seeking to enhance tax revenue in Kenya.
Assessment of adolescent physical development using body mass index and body self-perception
Authors: Cherniakova G.M. , Avdiievska O.H. , Danylenko H.M.
Published: July 2024

Underweight or overweight in children and adolescents is a serious public health problem. Self-perception is an important factor in promoting health, especially during adolescence. The purpose of this study is to assess the characteristics of self-perception of children with low body weight, normal body weight, overweight and obesity. This study was conducted in Kharkiv secondary schools in November 2021. The total number of participants was 14,853, of which 8,290 were girls and 6,563 were boys, aged 10-17 years. Using an online questionnaire, adolescents indicated their body weight and height, and also assessed their own health preserving activities. Diagnosis of  being underweight, overweight and obesity was carried out in accordance with World Health Organization (WHO) standards. Body self-esteem was assessed using the following questions: “What do you think about your body?”; “How satisfied are you with your health?”; “How satisfied are you with yourself?”; “How can you assess your own health?”. According to the results of the examination based on BMI, it was found that 63.1±2.4% of adolescents have normal body weight. Overweight was detected in 12.3±1.1%, obesity – in 2.4±0.5%. 17.4±1.3% of participants were underweight, and 4.8±0.7% had body mass deficit. By their own assessment, 75.0% of children considered themselves to have “normal” body weight, another 15.0% considered their weight “more than normal,” and about 10.0% of adolescents considered themselves “lean.” Among boys, 61.0% had normal body weight. About 16.5% of boys were considered overweight, and 3.8% of boys were obese. Insufficient body weight was found in 14.08% of respondents, and 4.6% had big body mass deficit.  Among girls, the percentage of participants with normal body weight was 64.8%. 8.95% of participants were considered overweight, 1.35% were obese. Almost 20.0% were underweight; a large deficiency was detected in 5.0% of girls. In order to carry out health promotion activities among schoolchildren, the sexual characteristics of self-perception of one's own body and health problems among adolescents should be taken into account. Boys were almost twice as more satisfied with themselves and their health than girls, regardless of how they perceived their body (p<0.01). The number of boys with overweight and obesity was twice as high as girls (20.0% vs. 10.0%). At the same time, almost one in four girls and one in five boys were underweight and/or had body mass deficit. The systematic collection and analysis of data on the health-preserving behavior of adolescents is an important component of the development and creation of health care programs for the children's population of Ukraine.
Diagnostic value of the gingival cytogram in school-age children suffering from chronic gastritis and duodenitis
Authors: Romanenko Ye.G. , Komskyi M.P. , Titov O.H. , Bureha I.Y. , Khotimska Yu.V. , Lavreniuk Ya.V. , Alieksieienko V.V. , Holub A.V.
Published: July 2024

In recent years, there has been an increase in the incidence of morbidity associated with digestive organ pathology in the pediatric population. The oral cavity is the digestive tract opening, sharing a common ectodermal origin with it. The changes in the cytogram of the oral mucous membranes can signal about exacerbation of pathological processes in the gastrointestinal tract. The aim of this work: to identify the features of gingival cellular composition in school-age patients with chronic gastritis and duodenitis in order to improve diagnostic methods at the disease stages. Examinations of the gingival cytogram in children aged 12-17 years with chronic gastritis and duodenitis (27 individuals with the disease in acute stage, 30 – in remission) were carried out. The control group included 28 children who did not have any somatic pathology by the results of the examination. For cytological examination, imprint smears from the gingival vestibular surface of the upper and lower jaws were made. The smears were fixed and stained by the May-Grunwald Pappenheim method, and then examined using a microscope with an im­mersion system. The percentage of epithelial cells and connective tissue cells  was calculated per 100 cells. The number of pathologically altered epithelial cells was determined: with vacuolated cytoplasm, with nucleus deformation. In children with chronic gastritis and duodenitis disorders in the gingival cellular composition with a predominance of dystrophic components were found, that was manifested by a decrease in the proportion of epithelial cells at terminal stages of differentiation, an increase in the proportion of cells with cytopathological phenomena, polymorphonuclear leukocytes and lymphocytes. Changes in the cytogram were especially expressed in the phase of disease exacerbation. Knowing the phases of the wound process, based on the timing and sequence of the cellular ensembles seen in the cytogram, it is possible to control the disease periods, and timely apply measures to prevent exacerbations. This diag­nostic method is especially indicated for children who have relative and absolute contraindications for fibroesogastroduodenoscopy.
Optimization and standardization of the work of a health care facility during a chemical accident
Authors: Hudoshyna O.V. , Kurdil N.V.
Published: July 2024

During the years of war, as a result of aviation and missile attacks, a significant number of health care facilities in various regions of Ukraine were destroyed, and the complexity and intensity of their work increased significantly. If the readiness of hospitals and their employees to treat gunshot and explosive injuries is established, in the case of mass destruction of chemically hazardous enterprises and the threat of the enemy using weapons of mass destruction, including chemical weapons, there is a need for special training of health care facilities to work in the in conditions of chemical threats. The aim of the work was justification of the development and set of measures for the implementation of standard operating procedures in the event of a chemical incident. The legal documents and recommendations of the Ministry of Health of Ukraine, management of the World Health Organization and the Red Cross on the topic of the study were used. The research methods: bibliosemantic, analytical, modeling were applied. It is established that the special management group, which includes representatives of various services, is of decisive impor­tance in the effective management of a health care facility during a chemical incident: administration; communication department; security department; management of nurses and the department of infection control; human resources department; pharmacy; intensive care unit; department of engineering maintenance and repair; laboratory; kitchen; laundry; cleaning service and waste management. The most important measures of response to a chemical incident that ensure the safety of medical personnel and patients are the organization of a triage zone and a decontamination area for chemically affected persons. Based on the above, to prepare a health care facility for work during a chemical incident, it is necessary to develop a response plan, which consists of special administrative and management decisions and provides for regular staff training.
ФОРМУВАННЯ ЕМОЦІЙНО-ВОЛЬОВОЇ СТІЙКОСТІ МАЙБУТНІХ ОФІЦЕРІВ ЗБРОЙНИХ СИЛ УКРАЇНИ: РЕЗУЛЬТАТИ ФОРМУВАЛЬНОГО ЕТАПУ ПЕДАГОГІЧНОГО ЕКСПЕРИМЕНТУ
Authors: Калаур С. М. , Окаєвич А. В.
Published: July 2024

У статті представлено результати статистичного опрацювання даних педагогічного експерименту з формування емоційно-вольової стійкості майбутніх офіцерів у вищих військових навчальних закладах. Визначено, що проведене експериментальне дослідження дало змогу проаналізувати та узагальнити статистичні показники діагностики, визначити рівень сформованості емоційно-вольової стійкості майбутніх офіцерів, перевірити ефективність впровадження педагогічних умов формування емоційно-вольової стійкості майбутніх офіцерів та виявити чинники, які справляють визначальний вплив на вдосконалення військово-професійної підготовки курсантів у вищих військових навчальних закладах. Акцентовано увагу на забезпеченні адекватності та валідності діагностичного інструментарію оцінки рівня сформованості емоційно-вольової стійкості майбутніх офіцерів під час навчання у вищих навчальних закладах, розроблення опитувальників для оцінки рівня виконання обов’язків курсантами на первинних посадах офіцерського складу під час проходження стажування та проведення аналізу академічної успішності курсантів протягом навчального року. З’ясовано, що за результатами констатувального етапу експерименту наявне переваження низького та середнього рівнів сформованості емоційно-вольової стійкості майбутніх офіцерів за всіма визначеними критеріями. Проведений аналіз одержаних результатів формувального етапу експериментального дослідження після впровадження в освітній процес виокремлених педагогічних умов та структурно-функціональної моделі формування емоційно-вольової стійкості свідчить про позитивні статистично достовірні зміни у рівнях сформованості емоційно-вольової стійкості за виокремленими критеріями: ціннісно-мотиваційним, когнітивно-практичним та діяльнісно-оцінним. Здійснено перевірку одержаних результатів експериментального дослідження за допомогою методів математичної статистики шляхом підтвердити ефективність запроваджених в процес військово-професійної підготовки майбутніх офіцерів педагогічних умов та структурно- функціональної моделі формування емоційно-вольової стійкості.
КЛІМАТИЧНА ОСВІТА ДЛЯ МАЙБУТНІХ ФАХІВЦІВ ФІЗИЧНОЇ КУЛЬТУРИ І СПОРТУ
Authors: Цигура Г. О.
Published: July 2024

У статті висвітлено особливості інтеграції кліматичних питань у професійну підготовку майбутніх фахівців фізичної культури і спорту. За результатами аналізу наукової та науково-методичної літератури з’ясовано, що питання кліматичної освіти є надзвичайно актуальним у країнах Європейського Союзу та більшості розвинених країн світу й здійснюється через заклади формальної освіти, тоді як в Україні воно мало обговорюється в наукових колах і є прерогативою громадських організацій. Спорт є масовою і достатньо впливовою галуззю на громади в усіх куточках планети. За кордоном ця галузь активно долучена до реалізації сталого розвитку. Оскільки кліматична освіта є складовою частиною освіти для сталого розвитку, показано реалізацію кліматичної освіти майбутніх фахівців фізичної культури і спорту в межах навчального курсу «Сталий розвиток у фізичній культурі і спорті». Зауважено, що слухачі курсу вивчають як традиційні питання про клімат: причини зміни клімату, вплив людської діяльності на клімат, наявні та можливі небезпечні наслідки зміни клімату, шляхи протидії та адаптації до зміни клімату; так і ключові моменти, які стосуються впливу зміни клімату на спорт: теплові хвилі та відсутність природного снігового покриву, які змушують змінювати час проведення спортивних змагань; проблеми зі здоров’ям спортсменів внаслідок високих температур повітря; пошкодження ігрових поверхонь через екстремальні температури, тривалі періоди посухи, повеней; несезонні опади, що змушують скасовувати або припиняти спортивні змагання; пошкодження будівель та інфраструктури через сильні шторми; необхідні заходи щодо адаптації до клімату під час розроблення нового або оновленого місця проведення спортивних змагань. Також розглянуто вплив спортивної галузі на клімат; позитивні практики спорту для захисту атмосфери та протидії зміні клімату; розроблення методичних та дидактичних матеріалів з кліматичних питань для використання їх у професійній діяльності майбутнього фахівця фізичної культури і спорту під час фізкультурно-оздоровчих, спортивних занять та спортивно-масових заходів. В майбутньому це дасть змогу охопити кліматичною освітою всі верстви населення, які є дотичними до фізичної культури і спорту.
ВИКОРИСТАННЯ ГЕЙМІФІКАЦІЇ ДЛЯ ФОРМУВАННЯ ЦИФРОВОЇ КОМПЕТЕНТНОСТІ У МАЙБУТНІХ ВИХОВАТЕЛІВ
Authors: Лазаренко А. В.
Published: July 2024

Виклики сьогодення ставлять перед суспільством великі вимоги, особливо це стосується учасників освітнього процесу. Швидка діджиталізація вимагає від педагогів високого рівня володіння інформаційно-комунікаційними та цифровими компетентностями, уміння вільно використовувати в роботі комп’ютерні та сучасні цифрові засоби, швидко опрацьовувати великий потік інформації, вміти впроваджувати в освітній процес сучасні онлайн-платформи. Згідно із Законом України «Про освіту» цифрова компетентність є однією з головних компетентностей, якою повинна оволодіти кожна людина для успішної трансформації в сучасному житті. У статті ми розглядаємо одну з основних складових частин професійної компетентності майбутніх вихователів закладів дошкільної освіти – цифрову, оскільки перед майбутніми вихователями стоїть завдання формування цієї компетентності у дітей дошкільного віку. Розглянуто різні підходи до визначення понять «компетентність» та «цифрова компетентність». Проведено аналіз останніх робіт вітчизняних та зарубіжних науковців з цієї проблеми. У статті також висвітлено практичні аспекти набуття майбутніми вихователями закладів дошкільної освіти цифрових компетентностей за допомогою гейміфікованих засобів навчання. Гейміфікація розглядається як один з дієвих методів покращення формування інформаційно-комунікаційних та цифрових компетентностей. Ми навели декілька прикладів безкоштовних онлайн-платформ, які використовували під час проведення гейміфікованих занять, вивчаючи курс «Інформаційно- комунікаційні технології у роботі з дітьми дошкільного віку» у Нікопольському фаховому педагогічному коледжі Дніпропетровської обласної ради.
A Review of the Child Anxiety Questionnaire Based on the Left-behind Children
Authors: Wang Wenwen , Yao Yanhong , Zou Meng , Zou Meng
Published: July 2024

Left-behind children are a special group in the process of urban development. They lack parental care, which affects the development of mental health. Anxiety is one of the most common psychological problems in children around the world. It has an important impact on children’s emotions and social interaction, lasting until adulthood. To study the anxiety of left-behind children, this study summarized the screening tools for children’s anxiety in this review and found that there is no anxiety questionnaire for left-behind children at present and most of the existing anxiety questionnaires for children are not completely based on the existing diagnostic criteria. As a result, these scales are not able to accurately measure all contents covered by the concept of children’s anxiety. The study summarized the left-behind anxiety questionnaire to provide some ideas for choosing a questionnaire for researchers studying left-behind children. In addition, the study believes that the development of anxiety scales for left-behind children as soon as possible and the use of multiple measurement methods should be the direction of future researchers.
Modelado de captura de CO2 mediante Calcium looping para la integración de Power-to-Gas en una siderúrgica basada en alto horno
Authors: Barón Vidán Cristian , Bailera Manuel , Perpiñán Jorge , Lisbona Pilar , Pe´ña Begoña
Published: July 2024

En este trabajo se modela una planta de captura de CO2 mediante Calcium Looping. Posteriormente, se integra en un esquema Power-to-gas de una industria siderúrgica basada en alto horno, que también usa oxi-combustión. Las reducciones en emisiones obtenidas son 1259 kgCO2/tacero, correspondientes a una reducción del 36%.
Analysis of Migrant Compounds from Food Packaging: Application to Disposable Tableware and Risk Analysis
Authors: Jiménez Estremera Carlos , Blázquez-Martín Javier , Domeño Recalde Celia , Nerín de la Puerta Cristina
Published: July 2024

Substance migration from nine types of disposable plates made from cardboard, polystyrene (PS), and polypropylene (PP) have been studied. Migration tests were performed in four food simulants over 10 days at 40°C. Simulant extracts were analyzed using SPME-GC-MS and UPLC-QTOF-MS to identify and (semi)quantify volatile and non-volatile migrants, respectively.
Shifting techniques and multi-platform services for carbon efficiency
Authors: Tirel Nicolas , Ilarri Sergio , Roose Philippe , Noureddine Adel , Le Goaër Olivier
Published: July 2024

The impact of IT on climate change is growing rapidly. We aim to develop a data model that evaluates the carbon footprint of digital services, along with a visualization tool to inform users. Besides, we intend to propose new services to reduce carbon emissions when computing workload, adapting the moment, the location or with leaner processing.
Modelado térmico de alta precisión y baja carga computacional orientado al control de temperatura de encimeras de inducción
Authors: Cásedas Erik , Ramírez Édgar
Published: July 2024

En este trabajo se ha desarrollado un modelo térmico de baja carga computacional del sistema cocina de inducción-recipiente. Usando técnicas MOR (reducción de orden de modelos), un modelo reducido de tres variables de estado logra una precisión comparable a un FEM (modelo de elementos finitos) con miles de nodos.
Radar FMCW de ondas milimétricas para la medida de la altura del manto nivoso: prototipo y medidas en la temporada 2023-2024
Authors: Herráiz-López Víctor , Subías Martín Adrián , Salinas Iñigo , Alonso Rafael
Published: July 2024

En este trabajo presentamos un prototipo de radar FMCW operando en torno a 120 GHz con un ancho de banda de 3.3 GHz, que permite medir la altura del manto nivoso con precisión centimétrica. Además presentamos el resultado de medidas de campo durante la temporada invernal 2023-2024 en la estación experimental AEMET-Formigal, en el Pirineo.
Metanación de biogás en reactor de lecho fijo. Influencia de la configuración de la alimentación
Authors: Aragüés Aldea Pablo , Gimeno Izquierdo Chuan , Durán Paúl , Mercader Víctor Daniel , Francés Eva , Peña José Ángel , Herguido Javier
Published: July 2024

Este trabajo muestra los experimentos realizados con un catalizador de Ni-Fe para la reacción de metanación de CO2. El objetivo es mejorar la selectividad hacia el producto deseado (CH4) en un reactor con múltiples entradas, determinando la estrategia más adecuada de alimentar los reactivos para llevar a cabo el proceso.
Extracción Supercrítica y Caracterización de Extractos de Cistus ladanifer y Rosmarinus officinalis
Authors: Belgharbi Fallah , Pardo Juan , Navarro-Rocha Juliana , Urieta José S. , Mainar Ana M.
Published: July 2024

La extracción supercrítica y la caracterización de extractos de Cistus ladanifer y Rosmarinus officinalis se enfocan en obtener extractos con potencial antioxidante y antimicrobiano mediante el uso de CO2 supercrítico. Se utilizó cromatografía (HPLC) para analizar los compuestos bioactivos, lo que permitió obtener resultados prometedores para aplicaciones farmacéuticas y cosméticas.
Penerapan Model Project Based Learning untuk Meningkatkan Kreativitas dan Prestasi Belajar Materi Bangun Datar
Authors: Sasongko Timbul
Published: July 2024

Tujuan penelitian adalah meningkatkan penerapan model PjBL dalam meningkatkan kreativitas dan prestasi belajar Matematika Bangun Datar Siswa Kelas IV Semester II SD Negeri 6 Punung Tahun Ajaran 2022/2023. Penelitian ini jenis penelitian tindakan kelas. Subjek penelitian siswa Kelas IV SD Negeri 6 Punung berjumlah 5 siswa. Pengumpulan data: observasi, angket, tes, dan dokumentasi. Keberhasilan kreativitas minimal “Baik” dengan konversi 10,5 ≤ x <13,5 terlibat kreatif dan prestasi belajar siswa 70 skala penilaian 1-100. Analisis data dilakukan menggunakan kualitatif dan kuantitatif. Hasil penelitian menunjukkan bahwa (a) model PjBL dapat meningkatkan kreativitas siswa pada semua indikator yaitu disiplin, bekerja kreatif, inspirasi dan wawasan, improvisasi, imajinasi, dan inkubasi (b) Prestasi belajar siswa meningkat dari rata-rata sedang menjadi sangat tinggi pada akhir siklus.
Read Aloud pada Pembelajaran Berdiferensiasi untuk Meningkatkan Literasi Siswa Lambat Belajar
Authors: Nurdyana Yenicke Bara
Published: July 2024

Penelitian dilakukan untuk menguji metode read aloud dalam peningkatan literasi siswa lambat belajar di sekolah dasar pada pembelajaran berdiferensiasi. Jenis penelitian menggunakan penelitian experimen. Metode penelitian yang digunakan adalah Pre-eksperimental Design. penelitian dirancang menggunakan one-group pre-test post-test design. Dalam penelitian dilakukan tes diagnostik pada awal pembelajaran, kemudian dilakukan treatment dengan menerapkan metode read aloud dalam pembelajaran. Pada akhir penelitian diberi tes akhir untuk mengetahui hasil pembelajaran. Teknik pengumpulan data menggunakan observasi, tes, dan dokumentasi. Subyek penelitian siswa lambat belajar kelas II Sekolah Dasar Negeri Tunjung 1 Kabupaten Bangkalan. Dengan menggunakan F-test two-sample for variances, 3 orang siswa berkebutuhan khusus teridentifikasi masih sangat rendah dalam memahami bacaan, dengan rata-rata nilai diagnostik sebesar 11,11%. Hipotesa penelitian ini adalah bahwa read aloud dapat meningkatkan literasi siswa yang mengalami lambat belajar. Hasil penelitian menunjukkan nilai taraf signifikansi data lebih kecil dari nilai taraf signifikansi (0,050) yaitu 0,003. Diketahui bahwa nilai taraf signifikansi (α) = 0,003 < 0,050, artinya bahwa hipotesa penelitian ini dapat dibuktikan dan diterima. Metode read aloud diyakini dapat meningkatkan kemampuan literasi siswa lambat belajar dan dapat digunakan sebagai metode pembelajaran berdiferensiasi di sekolah dasar yang diteliti.
Implementasi Pembelajaran Berdiferensiasi Berbantuan Program Geogebra Materi Gradien Persamaan Garis Lurus
Authors: Prianto Agus
Published: July 2024

Pembelajaran gradien persamaan garis lurus siswa VIIID SMP Negeri 1 Jepara sangat prosedural, rutin, manual dan belum sepenuhnya memenuhikebutuhan belajar siswa sehingga siswa kurang tertarik, cepat jenuh dan hasil asesmen siswa rendah. Oleh sebab itu guru mengimplementasikan pembelajaran berdifferensiasi berbantuan program Geogebra. Penelitian ini menggunakan metode deskriptif. Tujuan penelitian ini mendeskripsikan implementasi pembelajaran berdifferensiasi dengan program Geogebra materi gradien persamaan garis lurus dan hasilnya. Data penelitian ini terdiri atas aktivitas proses pembelajaran, hasil observasi aktivitas guru dan siswa, dan hasil asesmen siswa. Implementasi proses pembelajaran berdiferensiasi dilakukan dengan Langkah berikut (1) penyajian informasi dan tujuan pembelajaran; (2) pembentukan kelompok diskusi; (3) diskusi kelompok dan bimbingan (scaffolding); (4) penguatan dan asesmen; (5) refleksi dan umpan balik. Hasil rerata aktivitas proses pembelajaran guru dan siswa yaitu 92.36% dan 86.11% dengan kriteria baik sekali. Hasil asesmen materi gradien diperoleh skor rata-rata 81,51 (kategori sangat baik).Hasil ini menunjukkan dampak positif dan signifikan proses pembelajaran dan hasil belajar siswa.
Rosácea. Identificación, manejo clínico y nuevas perspectivas terapeúticas
Authors: Lucas Guadalupe Andrea Katherine San , Pinos Reyes Byron Fabián , Rivera Ticona Alfredo Augusto , Rivera Ticona Alfredo Augusto
Published: July 2024

La rosácea es una dermatosis inflamatoria crónica que principalmente afecta la región centrofacial, aunque puede involucrar otras áreas del cuerpo. Su prevalencia en la población caucásica varía entre el 0.9% y el 10%, y su diagnóstico es desafiante debido a la variabilidad de los signos y síntomas. La patogenia de la rosácea no está completamente comprendida, pero se han identificado factores desencadenantes como la reactividad vascular, respuestas inmunológicas a microorganismos, y alteraciones en el microbioma intestinal. La enfermedad se clasifica en cuatro subtipos: eritematotelangiectásico, papulopustuloso, fimatoso y ocular, cada uno requiriendo un enfoque terapéutico específico. Los avances en tratamientos, como el uso de láseres y luz pulsada, han mejorado la eficacia del manejo de la rosácea. Sin embargo, la enfermedad tiene un impacto significativo en la calidad de vida, afectando la autoestima y el bienestar emocional de los pacientes. En niños, la rosácea es rara y suele confundirse con otras condiciones eritematosas. El tratamiento debe ser adaptado a la edad del paciente y a la severidad de la condición. La revisión sugiere la necesidad de un enfoque multidisciplinario para abordar los aspectos dermatológicos y emocionales de la rosácea, así como la implementación de estrategias de manejo personalizadas y basadas en la evidencia.
Adaptação cultural e evidências de validade da escala Imagination, Criativity and Innovation (ICI) para uso na língua portuguesa do Brasil
Authors: Santos Marcel Oliveira dos , Viana Helena Brandão , Renzulli Joseph , Roza Rodrigo Hipólito , Quadros Silvia Cristina de Oliveira
Published: July 2024

O objetivo desta pesquisa foi realizar a adaptação cultural da “Imagination, Creativity and Innovation Scale (ICI)”, uma ferramenta que mede as oportunidades de trabalhar a imaginação, criatividade e inovação de estudantes. Para o procedimento de adaptação cultural do instrumento, utilizou-se a Metodologia de Cosmin, que envolve cinco estágios. O pré-teste foi aplicado em 40 estudantes para avaliar a equivalência da versão para aplicação final do inventário e confiabilidade do instrumento adaptado. Na etapa final, o instrumento final foi aplicado em uma amostra de 199 alunos conforme descrito no item Sujeitos e Métodos. A confiabilidade do instrumento foi obtida pelos valores de Alpha de Cronbach e Ômega de McDonald’s (0.82 e 0.81). Já a análise fatorial confirmatória apontou para três fatores com boas cargas fatoriais. Os resultados da análise confirmatória sugerem que a versão adaptada para o português do Brasil deste instrumento tem boas características psicométricas.
Implementation of Independent Curriculum Policy in Facing the Society 5.0 Era
Authors: Idris Julizar , Jumanah Jumanah , Rahmawati Ira , Marlina Marlina , Nurlinda Nurlinda
Published: July 2024

The rapid development of technology in the era of society 5.0 is characterized by the rapid pace of information technology, this also makes various challenges appear in various aspects, one of which is education. The functions and objectives of National Education are none other than to develop capabilities and form distinguished national character and civilization in the context of educating the nation's life. In the education system in Indonesia. This research was conducted with a qualitative approach, through literature studies. Data collection was carried out by tracing various sources of literature or literature in the form of RI Minister of Education and Culture Regulation Number: 262/M/2022, journals, and other documents related to the independent curriculum. The independent learning curriculum is presented as an answer to the occurrence of a comprehensive transformation in all aspects, especially the demands of human resources who are able to compete and adapt. The implementation of the independent curriculum in the era of society 5.0 for 12 years of compulsory education has been implemented since February 2022 by the MENDIKBUDRISTEK as one of the independent learning programs to improve the quality of learning. Monotonous learning is a barrier for students to demonstrate their abilities and competencies. The pattern of life that is happening is increasingly dynamic as if there are no limits, this is proven by the development of the world of technology which is growing rapidly. Therefore, education must be able to keep up with the dynamics of the times. In its application, the Merdeka curriculum must also be adapted to the conditions and characteristics of each school, so as to maximize existing potential. In this case, schools must be able to identify the needs and challenges faced, and develop appropriate strategies to overcome them. Thus, it is hoped that the learning process in schools can run well and produce quality output.
Analysis of the Application of Service Innovation to the Study of Public Service Quality in the "House of the Sky" in Sidenreng Rappang Regency
Authors: Baharuddin Aris , Asmar Asmar , Abdullah Asmilah
Published: July 2024

Service innovation is adopted not only as a measure to deal with changes in the organizational environment. More than that, the purpose of service innovation is to improve the quality of public services. Public service innovation continues to be carried out by the government in various sectors, one of which is in the education sector. The education sector is a sector that has an important role that can make a major contribution to national development. Quality education actually gives birth to superior resources in carrying out nation building. This study aims to find out how the application of the "Rumah Langit" service innovation affects the quality of public services felt by the people of Sindenreng Rappang Regency. This research will be conducted from May to November 2023. The research locations include four villages in Sidenreng Rappang Regency. The research method to be used is to use quantitative methods with the research population, namely the people of Sidenreng Rappang Regency who are recipients of the "Rumah Langit" service innovation. This research sample was taken using simple random sampling technique. The tests used in this research are validity tests, reliability tests, descriptive statistical analysis and inferential statistical analysis. The research results show that the indicators used for each variable are in the good category. Through the results of the significance test, it shows that service innovation has a significant effect, where the significant value is smaller than the alpha value, while the calculated t value is greater than the t table, so it can be concluded that there is a significant influence between service innovation on the quality of public services in the "Rumah Langit" service in Sidenreng Rappang Regency.
Assessing Regional Asset Management Practices in The Provincial Government of West Sulawesi: Insights from APIP Supervision Based on Permendagri No.19/2016
Authors: Mediaty Mediaty , Ruslan Ruslan , Ulman Akbar , Mahfud Mahfud , Ridwan ST. Faizah
Published: July 2024

Clear Description about regional wealth and basis for preparing financial report can be accomplished by good implementation of Regional Asset Management Practices. This research aim to assessing problem on regional asset management in the Provincial Government of West Sulawesi. The Research Method using quantitative analysis from data representation dan qualitative analysis from Permendagri No.19/2016. Conceptual analysis is carried out to data that show the weakness of asset management practices in The Provincial Government of West Sulawesi. These weaknesses include unoptimal of administration implementation by asset users and administrators, the potential loss of official vehicles that are still controlled by moved officials, not documented asset need in the RKBMD, unpaid vehicle taxes, the absence of decree for asset usage, and undocumented asset maintenance by regional asset maintenance cards.
Profil Kemampuan Berpikir Aljabar Pada Materi Kubus dan Balok Ditinjau dari Kemadirian Belajar Siswa SMP
Authors: Amalia Rhein , Kusumaningsih Widya , Endahwuri Dian
Published: July 2024

Kemampuan berpikir aljabar siswa perlu dikembangkan melalui pembelajaran matematika. Tujuan penelitian ini untuk mengetahui kemampuan berpikir aljabar siswa SMP kelas VIII dalam menyelesaikan soal kubus dan balok ditinjau dari kemandirian belajar siswa. Penelitian ini menggunakan metode deskriptif kualitatif. Penelitian ini dilaksanakan dikelas VIII E SMP N 3 Semarang yang dipilih berdasarkan hasil tes angket. Subjek penelitian ini dipilih berdasarkan tes angket kemandirian belajar dari 32 siswa kelas VIII dipilih  6 siswa yang terdiri dari 2 subjek dengan kemandirian belajar lemah, 2subjek dengan kemandirian belajar kuat, dan 2 subjek dengan kemandirian belajar sangat kuat. Instrument yang digunakan pada penelitian yaitu tes angket kemandirian belajar untuk menentukan subjek penelitian, soal kubus dan balok untuk memunculkan kemampuan berpikir aljabar siswa, dan pedoman wawancara. Keabsahan data menggunakan triangulasi teknik yaitu melakukan pengeccekan data yang telah diperoleh dari sumber yang sama menggunakan teknik yang berbeda. Hasil peneltian berdasarkan tes dan wawancara diperoleh 1) subjek dengan kemandirian belajar lemah subjek mampu memunculkan indikator generasional dan indikator transformasional 2) subjek dengan kemandirian kuat subjek mampu memunculkan indikator generasional, indikator transformasional dan indikator level-meta global 3) subjek dengan kemandirian sangat kuat subjek mampu memunculkan indikator generasional, indikator transformasional dan indikator level-meta global
Analisis Kemampuan Koneksi Matematika pada Materi Statistika Ditinjau dari Self Confidence
Authors: Yunita Defri Yana , Utami Rizky Esti , Aini Aurora Nur
Published: July 2024

Penelitian ini merupakan penelitian yang menggunakan metode kualitatif untuk mendeskripsikan kemampuan koneksi matematika pada materi statistika ditinjau dari Self Confidence. Pada penelitian ini subjek yang digunakan yaitu siswa kelas VIII SMP Negeri 2 Randublatung. Pemilihan subjek dilakukan menggunakan metode purposive sampling untuk memilih 1 siswa dengan tingkat Self Confidence tinggi, 1 siswa dengan tingkat Self Confidence sedang, dan 1 siswa dengan tingkat Self Confidence rendah. Teknik pengumpulan data yang digunakan dalam penelitian ini yaitu angket, tes tertulis, dan wawancara. Teknik analisis data yang digunakan dalam penelitian ini adalah reduksi data, penyajian data dan penarikan kesimpulan/validasi. Penelitian ini menggunakan triangulasi teknik sebagai teknik pemeriksaan keabsahan data. Hasil yang diperoleh dari penelitian ini yaitu: (1) Siswa yang memiliki tingkat Self Confidence tinggi memiliki kemampuan koneksi dalam setiap indikator kemampuan koneksi matematika. (2) Siswa yang memiliki tingkat Self Confidence sedang memiliki kemampuan koneksi matematika yang baik dalam 2 indikator dan kurang mampu dalam menyelesaikan 3 intikator lainnya. (3) Siswa yang memiliki tingkat Self Confidence rendah memiliki kemampuan koneksi matematika yang kurang mampu dalam 2 indikator dan tidak mampu dalam 3 indikator lainnya.
Daily monitoring of the biopotential of wheat seedlings as a means of increasing the assessment of plant stress resistance
Authors: Seroklinov G. V. , Gun̕ko A. V.
Published: July 2024

The results of studying the process of changing the biopotential of wheat seedlings of the Novosibirskaya 41 variety when exposed to elevated (43 °C) and reduced (8 °C) temperatures are presented. The experiments took place in 2020 and 2022. The automated system "AutoExpI" was used in the research. The data on the dynamics of plant biopotential resulting from identical temperature changes in the environment when the age of seedlings changes were obtained. The mean absolute maximum centered values (U max c) of the biopotential of seedlings aged 10 to 19 days when exposed to elevated and reduced temperatures in 2020 and 2022 were statistically analyzed using Statistica 6 software (Statistica 6). The regression relationships determined during the regression analysis of the biopotential indices under the action of elevated temperature are described with respect to the age of seedlings by second-order polynomials with correlation coefficient R = 0.997 at p = 0.072 for the results of the experimental studies in 2020 and R = 0.986 at p = 0.028 for the data for 2022. For the effect of reduced temperature, quadratic regression relationships were also obtained with a correlation coefficient of R = 0.995 at p = 0.1023 for the 2020 experimental results and R = 0.9998 at p = 0.00023 for the 2022 data. The closeness of the graphical representation of similar regression dependencies was noted, on the basis of which the algorithm was determined and expressions for correction of experimental data obtained in the process of prolonged experimental studies were obtained.