bluuebunny/crossref_metadata_2025_split huggingface dataset:
Мектеп информатикасында жасанды интеллект негіздерін оқытудың қажеттілігі
Authors: Әденбек Назира , Нурбекова Жанат 
Published: May 2024

Әлеуметтік және адам өмірінің әртүрлі аспектілерін цифрландыру ақпараттық технологиялар саласындағы жасанды интеллект бағытының артуымен сипатталады. Алдағы уақытта жасанды интеллектке байланысты құзыреттер кез келген кәсіптің мамандары үшін үлкен сұанысқа ие болады. Осыған байланысты ғалымдар мен педагогтер арасында мектепте жасанды интеллект негіздерін оқыту мәселесінің өзектілігі артып келеді. Сонымен қатар қазіргі таңда ҰБТ (Ұлттық Біріңғай тестілеу) сұрақтарына да жасанды интеллект негіздері бойынша сұрақтардың кіріктіріліуіне байланысты бұл тақырып зерттеуді қажет етеді. Бұл мақалада мектеп информатикасында жасанды интеллект негіздерін оқыту мазмұны қарастырылып, талдау жасалынды. Қазіргі білім беру жүйесінде орта буын оқушыларын оқыту кезінде мектеп информатикасында жасанды интеллект негіздерін оқытудың қажеттілігі қаншалықты деңгейде екенін анықталды. Зерттеу барысында мектептің 20 информатика пәні мұғалімдерінен және 40 оқушыдан сауалнама алынып, талданды. Зерттеу нәтижесі бойынша оқушыларда жасанды интеллект негіздері бойынша білім деңгейлері қарастырылып, олардың қызығушылықтарының жоғары деңгейде екені көрсетілді. Сонымен қатар мектеп информатикасында жасанды интеллект негіздерін оқытудың қажеттілігі анықталып, жасанды интеллект негіздерін оқытуда көбінесе жобалық тапсырмалардың енгізілуі керек екендігі айқындалды.
Mundo Twitch: Entre Jóvenes Streamers y Espectadores
Authors: Aguirre Gamboa Patricia del Carmen , Ávila Cortés José , Anaya Avila María del Pilar , Laurencio Meza Rossy Lorena 
Published: May 2024

En los últimos 30 años la cultura juvenil se ha volcado a las prácticas sociodigitales que han encontrado en el ciberespacio una forma de expresión y representación de su época. El presente informe es producto de una investigación en curso por parte de académicos y estudiantes de la Facultad de Ciencias y Técnicas de la Comunicación de la Universidad Veracruzana en torno a la creación, producción y difusión de contenidos. En este caso se refiere al caso de Twich una plataforma de streaming en vivo que se enfoca principalmente en el entretenimiento, la transmisión de videojuegos y contenido relacionado con ellos, también se ha utilizado en algunos casos para difundir contenido relacionado con los diversos ámbitos del quehacer humano. Metodológicamente se aborda desde una metodología mixta. A través de la encuesta por conveniencia y la entrevista focalizada a diversos creadores digitales (streamers) y usuarios. Los hallazgos preliminares describen la naturaleza de la propia herramienta y los usos diversos que tanto streamers como espectadores le otorgan a la plataforma. Las conclusiones iniciales incorporan algunas implicaciones de los resultados de la investigación y presentan posibles derroteros en el uso de una plataforma digital como Twitch.
Enseñanza de Sel desde un Análisis Semiótico en Estudiantes de Noveno Grado de Educación Básica Secundaria en Colombia
Authors: Meléndez Zambrano Jaime 
Published: May 2024

Este estudio busca desarrollar competencias matemáticas en docentes de esta asignatura, contribuyendo al manejo asertivo de conceptos para la comprensión del conocimiento matemático en estudiantes, buscando así que los educadores logren afianzar en ellos el manejo de diferentes facetas del conocimiento práctico formal y conceptual, logrando ampliar la noción de sus competencias. Su propósito busca generar aportes teóricos para la construcción del análisis semiótico en la enseñanza de sistemas de ecuaciones lineales en estudiantes de secundaria. La metodología fue de tipo documental, y método fenomenológico hermenéutico. Los informantes lo constituyen docentes de matemática y estudiantes de Secundaria. La información recolectada se realizará mediante la técnica de entrevista semiestructurada utilizando categorización y triangulación, como procedimiento de análisis. En las derivaciones conclusivas, se busca presentar concepciones epistemológicas en torno a la enseñanza de sistemas de ecuaciones lineales a través del análisis y representaciones semióticas.
OVERVIEW OF THE LEVEL OF SATISFACTION OF THE PATIENT'S FAMILY AT THE CHILDREN'S POLY OF INDRAMAYU HOSPITAL
Authors: Musthofa Ali , Kamsari  , Azizah Novianda Ghina Nur 
Published: May 2024

Success in providing hospital services is measured by the level of patient satisfaction and patient family, satisfaction is a person's feeling of pleasure or disappointment with the impression obtained when or after receiving services. The purpose of the study was to determine the picture of the level of satisfaction of the patient's family at the children's poly of RSUD Indramayu. This research uses quantitative research methods with a descriptive approach. The population in this study was the families of patients in the children's poly, for the sampling technique using accidental sampling as many as 85 respondents. Research instruments using questionnaires and data analysis using univariate. The results of this study found that as many as 48 respondents (56.5%) of patients' families were satisfied and 37 respondents (43.5%) of patients' families were dissatisfied, with dimensions tangible 65 respondents (76.5%) patient families are satisfied, reliability dimensions 68 respondents (80%) patient families are satisfied, responsiveness dimensions 68 respondents (80%) patient families feel dissatisfied, assurance dimensions 53 respondents (62.4%) and empathy dimensions 85 respondents (100%) patient families feel satisfied. The conclusion of this study illustrates the level of satisfaction of the patient's family at the children's poly of Indramayu Hospital, the results were obtained in the satisfied category of as many as 48 respondents (56.5%) and did not meet the minimum hospital service standards determined by the Ministry of Health of the Republic of Indonesia, which is ≥90%. It is recommended that medical personnel be able to make efforts or efforts in improving the health services provided.
Usefulness of Syndromic Data Sources for Investigating Morbidity Resulting From a Severe Weather Event
Authors: Baer Atar , Elbert Yevgeniy , Burkom Howard S. , Holtry Rekha , Lombardo Joseph S. , Duchin Jeffrey S. 
Published: September 2010

ABSTRACTObjective: We evaluated emergency department (ED) data, emergency medical services (EMS) data, and public utilities data for describing an outbreak of carbon monoxide (CO) poisoning following a windstorm.Methods: Syndromic ED data were matched against previously collected chart abstraction data. We ran detection algorithms on selected time series derived from all 3 data sources to identify health events associated with the CO poisoning outbreak. We used spatial and spatiotemporal scan statistics to identify geographic areas that were most heavily affected by the CO poisoning event.Results: Of the 241 CO cases confirmed by chart review, 190 (78.8%) were identified in the syndromic surveillance data as exact matches. Records from the ED and EMS data detected an increase in CO-consistent syndromes after the storm. The ED data identified significant clusters of CO-consistent syndromes, including zip codes that had widespread power outages. Weak temporal gastrointestinal (GI) signals, possibly resulting from ingestion of food spoiled by lack of refrigeration, were detected in the ED data but not in the EMS data. Spatial clustering of GI-based groupings in the ED data was not detected.Conclusions: Data from this evaluation support the value of ED data for surveillance after natural disasters. Enhanced EMS data may be useful for monitoring a CO poisoning event, if these data are available to the health department promptly.(Disaster Med Public Health Preparedness. 2011;5:37-45)
An electroclinical case‐control study of sudden unexpected death in epilepsy
Authors: Lhatoo Samden D. , Faulkner Howard J. , Dembny Krystina , Trippick Kathy , Johnson Claire , Bird Jonathan M. 
Published: September 2010

AbstractObjective:Sudden unexpected death in epilepsy (SUDEP) accounts for approximately 1 in 5 deaths in patients with epilepsy, but its cause remains unexplained. A recorded seizure resulting in death in our center appeared to suggest that postictal generalized electroencephalographic (EEG) suppression (PGES) and apnea are implicated in SUDEP. Our objective was to determine the association between PGES, as a possible identifiable EEG marker of profound postictal cerebral dysfunction, and SUDEP.Methods:We studied 10 adult patients from our video‐telemetry database who had 30 documented epileptic seizures during video‐EEG recording and who later died of SUDEP. They were compared with 30 matching live controls with 92 epileptic seizures taken from the same database. Clinical and EEG findings were analyzed.Results:PGES was seen in 15/30 (50%) case and 35/92 (38%) control seizures. A Mann‐Whitney U test showed that PGES was significantly longer in the generalized motor seizures of the SUDEP group (p < 0.001). After adjustment for variables, odds ratio analysis of all seizures indicated significantly elevated odds of SUDEP with PGES durations of >50 seconds (p < 0.05). Beyond 80 seconds, the odds were quadrupled (p < 0.005). After adjustment for variables, for each 1‐second increase in duration of PGES, the odds of SUDEP increased by a factor of 1.7%(p < 0.005).Interpretation:Prolonged PGES (>50 seconds) appears to identify refractory epilepsy patients who are at risk of SUDEP. Risk of SUDEP may be increased in direct proportion to duration of PGES. Profound postictal cerebral dysfunction, possibly leading to central apnea, may be a pathogenetic mechanism for SUDEP. ANN NEUROL 2010
Biodegradability assessment of aliphatic polyesters‐based blends using standard methods
Authors: Moura I. , Machado A. V. , Duarte F. M. , Nogueira R. 
Published: September 2010

AbstractImportant information concerning polymer's final fate in the environment can be achieved in biodegradation studies. In this context, the focus of this study was to evaluate the biodegradability of blends containing aliphatic polyesters using standard methods. Blends of high‐density polyethylene, biodegradable polymer, and polyethylene modified with maleic anhydride (used as compatibilizer) were prepared in a corotating twin‐screw extruder. Biodegradable polymers used were poly(lactic acid) (PLA), poly(ε‐caprolactone) (PCL), and Mater‐Bi (thermoplastic starch with PLA or PCL). Biodegradation tests were carried out using two standard methods: (i) ISO 14851 (1999), biochemical oxygen demand in a closed respirometer and (ii) ASTM G 22‐76, microbial growth of test microorganisms. Both biodegradability tests suggested that the blend containing PCL is more biodegradable than the one containing PLA. Addition of starch increased the biodegradability of the PLA blend. The biodegradability of the blends evaluated in this study by the biochemical oxygen demand method ranged from 22% (PLA 60) to 52% for corn starch/PCL 30/70 (% wt) (SPCL 70). Therefore, the blends may not be considered “readily biodegradable” according to the OECD standard. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Effect of carbon nanotube purification on the electrical and mechanical properties of poly(ethylene terephthalate) composites with carbon nanotubes in low concentration
Authors: Yesil Sertan , Bayram Goknur 
Published: September 2010

AbstractSurface properties of carbon nanotubes (CNTs) were altered by purification with nitric acid, sulfuric acid, ammonium hydroxide, and hydrogen peroxide. As‐received and purified CNT‐based conductive poly (ethylene terephthalate) composites were prepared with a twin‐screw extruder. The effects of CNT purification on the surface properties of the CNTs and on the morphology and electrical and mechanical properties of CNT‐based composites were investigated. Surface energy measurements showed that the acidic component of the surface energies of the CNTs increased after purification. According to Fourier transform infrared (FTIR) spectroscopy, the purification resulted in the formation of oxygen‐containing functional groups on the surfaces of the CNTs. Electron spectroscopy for chemical analysis results indicate the removal of the metallic catalyst residues and an increase in the oxygen content of the CNT surfaces as a result of the purification procedure. X‐ray diffraction analyses revealed a change in the crystalline structure of the CNTs after purification. All of the composites prepared with the purified CNTs had higher electrical resistivities and tensile and impact strength values than the composites based on the as‐received CNTs because of the functional groups and defect sites formed on the surfaces of the CNTs during purification. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Thermal and mechanical properties of polypropylene/wood‐flour composites
Authors: Ndiaye Diène , Matuana Laurent M. , Morlat‐Therias Sandrine , Vidal Loïc , Tidjani Adams , Gardette Jean‐Luc 
Published: September 2010

AbstractIn this research, polypropylene/wood‐flour composites (WPCs) were blended with different contents of wood and/or maleated polypropylene (MAPP) and clay. We found that the addition of MAPP or clay in the formulation greatly improved the dispersion of the wood fibers in the composite; this suggested that MAPP or clay may have played the role of an adhesion promoter in the WPCs. The results obtained with clay indicate that it also acted as a flame retardant. The thermal tests carried out with the produced samples showed an increased crystallization temperature (Tc), crystallinity, and melting temperature (Tm) with wood loading. The increase of the two former parameters was explained by the incorporation of wood flour, which played the role of nucleating agent and induced the crystallization of the matrix polymer. On the other hand, the Tm increase was ascribed to the insulating properties of wood, which hindered the movement of heat conduction. The effects of UV irradiation on Tm and Tc were also examined. Tc increased with UV exposure time; this implied that UV degradation generated short chains with low molecular weight that could move easily in the bulk of the sample and, thus, catalyze early crystallization. The flexural strength and modulus increased with increasing wood‐flour content. In contrast, the impact strength and tensile strength and strain decreased with increasing wood‐flour content. All of these changes were related to the level of dispersion of the wood flour in the polymeric matrix. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Evaluating the behavior of castor‐oil‐based polyurethanes in acidic environments on the basis of the sorption behavior and analysis with electron ionization mass spectroscopy and neutron activation analysis
Authors: Mortley Aba , Bonin H. W. , Bui V. T. 
Published: September 2010

AbstractCastor‐oil‐based polyurethanes (COPUs) were fabricated from 2,4‐toluene diisocyanate and hexamethylene diisocyanate. Immersion weight‐gain methods at different temperatures were used to measure the sorption and diffusion of acidic solutions into the polyurethane. It was evident from this study that these COPUs can indeed be used in acid conditions as they exhibited a low absorption of diffusing solutions (<1%) with the apparent activation energies of diffusion and permeation estimated to be 85 and 18 kJ/mol, respectively. Neutron activation analysis confirmed the possibility of the clustering of the acidic diffusing solutions because the acid/water molar values within the polymer matrix were significantly larger than those expected of the bulk solution. Mass spectroscopy indicated that any degradation that may have occurred may have been the result of fracture at the ester bond in the castor oil segment of the polyurethane. Tensile tests showed that the modulus of the saturated polymers remained above the values of the unsaturated ones. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Effect of sterilization techniques on the physicochemical properties of polysulfone hollow fibers
Authors: Madsen Ben , Britt David W. , Griffiths Floyd , McKenna Elise , Ho Chih‐Hu 
Published: September 2010

AbstractSterilized hollow‐fiber membranes are used in hemodialysis, ultrafiltration, bioprocessing, and tissue engineering applications that require a stable and biocompatible surface. In this study, we demonstrated significant changes in the fiber physicochemical properties with different methods of sterilization. Commercial polysulfone (PS) hollow fibers containing poly(vinyl pyrrolidone) were subjected to standard ethylene oxide (ETO), sodium hypochlorite (bleach), and electron‐beam (e‐beam) sterilization techniques followed by analysis of the surface hydrophilicity, morphology, and water‐retention ability. E‐beam sterilization rendered more hydrophilic fibers with water contact angles near 47° compared to the ETO‐ and bleach‐treated fibers, which were each near 56°. Atomic force microscopy revealed lumen root mean square (rms) roughness values near 19 nm for all three sterilization methods; however, e‐beam‐sterilized and bleach‐treated fibers had significantly higher (∼ 106 nm) rms values for the outer wall compared to the ETO‐sterilized fibers (∼ 39 nm). The increased hydrophilicity and surface area of the e‐beam‐sterilized fiber were reflected by a greater water evaporation rate than that of the ETO‐treated fiber. These results demonstrate that common sterilization methods may significantly and distinctly alter the polymer membrane physicochemical properties, which may, in turn, impact the performance and, in particular, surface fouling. For tissue engineering and bioprocessing applications, these changes may be leveraged to promote cell adhesion and spreading. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
In vitro biocompatibility of electrospun silk fibroin mats with Schwann cells
Authors: Xu Shanqin , Yan Xiaoli , Zhao Yahong , Wang Wei , Yang Yumin 
Published: September 2010

AbstractIn this study, electrospinning was used to fabricate silk‐fibroin (SF)‐based mats, which served as substrates for the culturing of rat Schwann cells. Microscopic observation and physical parameter measurements revealed that the electrospun SF mats had a nanofibrous structure with favorable physical properties. Fourier transform infrared analysis provided chemical characterization of the molecular confirmation of the SF proteins in the mats. The morphology and immunocytochemistry showed that the mats supported the survival and growth of the cultured Schwann cells, and 3‐(4,5‐dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium bromide analysis indicated that the electrospun SF mat extract had no cytotoxic effects on Schwann cell proliferation. Collectively, all of the results suggest that the electrospun SF mats might become a candidate scaffold for tissue‐engineered nerve grafts to promote peripheral nerve regeneration. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Miscibility and crystallization behaviors of poly(3‐hydroxybutyrate‐co‐11%‐4‐hydroxybutyrate)/Poly(3‐hydroxybutyrate‐co‐33%‐4‐hydroxybutyrate) blends
Authors: Lan Zhiyuan , Pan Jueyu , Wang Xiaojuan , He Jianyun , Xu Kaitian 
Published: September 2010

AbstractBiopolyesters poly(3‐hydroxybutyrate‐co‐4‐hydroxybutyrate) with an 11 mol % 4HB content [P(3HB‐co‐11%‐4HB)] and a 33 mol % 4HB content [P(3HB‐co‐33%‐4HB)] were blended by a solvent‐casting method. The thermal properties were investigated with differential scanning calorimetry. The single glass‐transition temperature of the blends revealed that the two components were miscible when the content of P(3HB‐co‐33%‐4HB) was less than 30% or more than 70 wt %. The blends, however, were immiscible when the P(3HB‐co‐33%‐4HB) content was between 30 and 70%. The miscibility of the blends was also confirmed by scanning electron microscopy morphology observation. In the crystallite structure study, X‐ray diffraction patterns demonstrated that the crystallites of the blends were mainly from poly(3‐hydroxybutyrate) units. With the addition of P(3HB‐co‐33%‐4HB), larger crystallites with lower crystallization degrees were induced. Isothermal crystallization was used to analyze the melting crystallization kinetics. The Avrami exponent was kept around 2; this indicated that the crystallization mode was not affected by the blending. The equilibrium melting temperature decreased from 144 to 140°C for the 80/20 and 70/30 blends P(3HB‐co‐11%‐4HB)/P(3HB‐co‐33%‐4HB). This hinted that the crystallization tendency decreased with a higher P(3HB‐co‐33%‐4HB) content. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Preparation of cellulose–tungsten carbide composite beads with ionic liquid for expanded bed application
Authors: Shi Fei , Lin Dong‐Qiang , Phottraithip Wimonrat , Yao Shan‐Jing 
Published: September 2010

AbstractExpanded bed adsorption (EBA) is an integrated technology for capturing target biomolecules directly from unclarified feedstock. The adsorbents should be designed specially to ensure the perfect performance of the expanded bed. In this study, an ionic liquid (IL), 1‐butyl‐3‐methylimidazolium chloride, was used to dissolve cellulose directly to prepare cellulose–tungsten carbide composite beads with water‐in‐oil suspension and cooling/ethanol regeneration. The preparation conditions were optimized, especially for four key factors, the cellulose concentration, ratio of the oil phase to the cellulose solution, stirring speed, and addition of tungsten carbide powder. The results showed that the tungsten carbide powder emerged well in the cellulose matrix as an inert densifier. The composite beads had a spherical appearance, a suitable size and size distribution, an appropriate wet density of 1.32–1.68 g/mL, a porosity of 90–96%, a pore radius of 45–65 nm, and a specific surface area of 30–42 m2/mL. These results show the potential application for this EBA process. Compared to the traditional technology with cellulose xanthate viscose, the new method with the IL as the nonderivatizing dissolution solvent is technically feasible, has concise processing, and is environmentally friendly. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Synthesis and swelling properties of pH‐ and temperature‐sensitive interpenetrating polymer networks composed of polyacrylamide and poly(γ‐glutamic acid)
Authors: Rodríguez‐Félix D. E. , Castillo‐Ortega M. M. , Real‐Félix D. , Romero‐García J. , Ledezma‐Pérez A. S. , Rodríguez‐Félix F. 
Published: September 2010

AbstractNovel hydrogels of interpenetrating polymer networks (IPNs) composed of polyacrylamide and poly(γ‐glutamic acid) were synthesized. In these systems, both polymers were crosslinked independently; this reduced the potential loss of a polymer during the washing process, as often occurs in semi‐IPN systems. Interpolymer interactions were investigated with Fourier transform infrared spectroscopy and differential scanning calorimetry. These studies suggested possible interactions between both polymers by the formation of hydrogen bonds. The swelling behavior of these hydrogels was analyzed by immersion of the hydrogel samples in deionized water at 25 and 37°C and in buffer solutions with pHs of 3, 7, and 10. The kinetics of swelling showed increases in the values of the swelling ratio with increasing immersion time in the swelling medium, molar proportion of the biopolymer in the hydrogel, temperature, and pH of the swelling medium. All of the hydrogels swelled rapidly and reached equilibrium in an average time of 40 min. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011