bluuebunny/crossref_metadata_2025 huggingface dataset:
Модификация смачиваемости углеродных нанотрубок с помощью ионного облучения
Authors: Морковкин А.И. , Воробьева Е.А. , Евсеев А.П. , Балакшин Ю.В. , Шемухин А.А.
Published: March 2020

This paper presents the results of experiment to change wettability of commercial multi-walled carbon nanotubes (MWCNTs) Taunit-MD after irradiation with 120 keV Ar+ ions with various fluences. Using the Raman spectroscopy and scanning electron microscopy, the structure of the irradiated MWCNTs was investigated and X-ray microanalysis was carried out. The dependences of the average diameter of the MWCNTs, the concentration of O2 in the samples, and the defectiveness of the MWCNTs on the irradiation fluence, as well as their effect on the wettability angle with distilled water, ethylene glycol and cyclohexane are considered. The possibility and prospects of using ion-beam modification methods for the controlled change of the wetting angle in order to create a hydrophobic or hydrophilic MWCNTs coating to various types of liquids are discussed.
Применение диодов Шоттки в терагерцовом частотном диапазоне
Authors: Торхов Н.А. , Бабак Л.И. , Коколов А.А.
Published: March 2020

AbstractThe broad range of possibilities for optimizing the design and electrical parameters of crystals of Schottky diodes, manufactured according to the mesa–substrate and mesa–mesa planar technologies with anode terminals in the form of an air bridge with a whisker, along with the use of higher quality compact models, make it possible to efficiently exploit the physical potential of Schottky contacts when designing monolithic integrated circuits according to diode technologies, increase their reliability, and overcome the significant lag of semiconductor electronics behind optoelectronics in the terahertz (THz) frequency range.
Нейтроноводная система ультрахолодных и холодных нейтронов на реакторе ВВР-М
Authors: Серебров А.П. , Лямкин В.А. , Пусенков В.М. , Онегин М.С. , Фомин А.К. , Самодуров О.Ю. , Опрев А.Т. , Илатовский В.А. , Журавлев Ю.Н. , Щебетов А.Ф. , Сыромятников В.Г. , Гордеев Г.П. , Аксельрод Л.А. , Забенкин В.Н. , Голосовский И.В. , Смирнов О.П. , Лебедев В.Т. , Черненков Ю.П. , Рунов В.В.
Published: March 2020

AbstractThe results of calculation of fluxes of ultracold (UCNs), very cold, and cold neutrons at the output of neutron guides of the UCN source with superfluid helium at the WWR-M reactor are presented. UCN density ρ_35L = 1.3 × 10^4 n/cm^3 in the trap of the electric dipole moment (EDM) spectrometer was obtained by optimizing source parameters. This UCN density in the EDM spectrometer is two orders of magnitude higher than the UCN density at the output of the available UCN sources. The flux density of cold neutrons with a wavelength of 2–20 Å at the output of a neutron guide with a cross section of 30 × 200 mm^2 should be as high as 1.1 × 10^8 n/(cm^2 s), while the flux density of very cold neutrons (50–100 Å) at the output of the same neutron guide should be 2.3 × 10^5 n/(cm^2 s). An extensive program of fundamental and applied physical research was mapped out for this source.
Helping Optimize Language Acquisition (HOLA) Online Parent Training Modules for Latinx Parents of Toddlers at Risk for ASD: Protocol for a Pilot Funded by the Organization for Autism Research (Preprint)
Authors: Dodds Robin Lynn
Published: March 2020

BACKGROUND

Culturally competent parent training in evidence-based intervention for autism spectrum disorder (ASD) can provide young Latinx children from underserved communities with early interventional support while they wait for professional services, thus reducing the impact of intervention delays. Providing parents with brief bilingual training in Pivotal Response Treatment (PRT) is a strategy that can overcome these barriers and is inexpensive to disseminate. Brief PRT training has been shown to significantly improve joint attention, expressive language, responsivity, and adaptive skills in young children with ASD. However, it is unknown whether an interactive, culturally competent online parent training in PRT is effective in a Latinx population.

OBJECTIVE

To this end, we will recruit 24 children (16-36 months old) at risk for ASD and their parent(s) from East and South Los Angeles and provide them with a series of 6 online learning modules in their choice of Spanish or English.

METHODS

This pilot study will utilize a single-group, pilot, pre-post design with follow-up assessments 6 weeks later. Linear mixed-effects model analysis will be used to explore most parent-reported and coded outcomes.

RESULTS

Brief online parent training in evidence-based treatments has the capacity to increase access to culturally competent early communication interventions for young children at risk for ASD.

CONCLUSIONS

The results of this trial may have particular salience in additional underresourced communities where children have limited access to interventions prior to entering school.

INTERNATIONAL REGISTERED REPORT

PRR1-10.2196/18004
Methyl-3-(2-hidroxy-5-nitrophenyl amino)-3-phenylpropanoate Based Colorimetric Sensor for Oxyanions
Authors: Suryanti Venty , Wibowo Fajar Rakhman , Handayani Sekar
Published: March 2020

A colorimetric anion sensor of methyl-3-(2-hydroxy-5-nitrophenyl amino)-3-phenylpropanoate bearing –OH and –NH groups as binding sites and nitrophenyl as a signaling unit, has been successfully accomplished. The compound functioned as a colorimetric chemosensor for H2PO4– and AcO–, in particular, the sensor showed significant naked-eye detectable color change from colorless to light yellow. In contrast, no color change was detected upon addition of other anions such as SO42–, NO3–, and CIO4–. The anion sensing ability of the sensor was further investigated by UV-Vis absorption spectroscopy in acetone. Characteristic UV-Vis spectra changes were revealed upon addition of H2PO4– and AcO–.
Extraction of Omega-3 Fatty Acid from Jade Perch (Scortum barcoo) Using Enzymatic Hydrolysis Technique
Authors: Iberahim Nur Izzati , Hann Yee Chee , Hamzah Zainab , Sohaimi Khairunissa Syairah Ahmad
Published: March 2020

Extraction of omega-3 fatty acid from Jade Perch (Scortum barcoo) using enzymatic hydrolysis techniques are expected to be more economically possible techniques due to the uses of the enzyme with the characteristic of environmentally friendly, reusable and less energy required during large-scale production. Design of Experiments (DOE) was used to study the effect of process parameters such as the concentration of alcalase (0.5–1.5%), temperature (50–70 °C) and pH (6.5–8.5) towards the yield of oil. The findings showed 16.55% of oil yield was extracted from the jade perch under an optimum condition at 50 °C, 6.5 pH with 0.5% of enzyme concentration for 2 h incubation time. The fish oil was then undergone enzymatic concentration of omega-3 FA using lipase from Candida rugosa. The acid value and peroxide value of the fish oil was 71.422 mg KOH/g and 0.799 meq/kg, while the acid and peroxide value of the omega-3 concentrated oil was lower to 49.074 mg KOH/g and 0.399 meq/kg. The FTIR spectrum showed the presence of C–H stretch, =C–H stretch and C=O stretch bond justified the existence of lipids as it presents of alkanes, alkene, and carboxylic acids functional group. At the same time, GC-MS analysis showed the fish oil contains higher total PUFA content and omega-3 fatty acid content than omega-3 concentrated oil.
Wild Boar-Specific PCR Assay and Sequence Analysis Based on Mitochondrial Cytochrome-B Gene for Halal Authentication Studies
Authors: Aina Ganea Qorry , Rohman Abdul , Erwanto Yuny
Published: March 2020

Wild boar meat (WBM) is non-halal meat widely abused in Indonesia. The most common case is mixing beef with WBM either in raw or processed foods. Therefore, it is necessary to develop a detection method of WBM contamination. The objective of this study was to employ polymerase chain reaction (PCR) and sequence analysis using species specific primer (SSP) targeting on wild boar mitochondrial cytochrome-b (CYTBWB2-wb) gene for the identification of WBM in a meatball. The specificity of primer was tested, and the amplicon size was confirmed with conventional PCR and agarose electrophoresis. The base sequences were analyzed using GeneStudio software and subjected to BLAST using NCBI. CYTBWB2-wb primer was also used to test the reference meatballs made from beef and WBM using real-time PCR. The result showed that CYTBWB2-wb amplified wild boar Cyt-B mt-DNA gene specifically. The amplicon size was 194 base pair (bp) with a similarity of 93–98% toward gen Cyt-B mt-DNA of several wild boar types. The primer is able to detect WBM on the reference meatballs up to 0.1% wt/wt with efficiency value of 108.0% and coefficient of determination (R2) of 0.970. The CYTBWB2-wb primer proved to be specific and could be used as a standard method to identify the presence of WBM contamination in meatball products for halal authentication studies.
Preparation, Characterization and Study of the Photodecolorization of Mixed-Ligand Binuclear Co(II) Complex of Schiff Base by ZnO
Authors: Abass Suhad Kareem , Al-Hilfi Jassim Abbas , Abbas Sawsan Khudhair , Ahmed Luma Majeed
Published: March 2020

In this work, a new mixed-ligand binuclear Co(II) complex of Schiff base was prepared. Moreover, the characterization of this prepared complex was performed by measurement of melting points, UV-Vis spectra, FT-IR spectra, and magnetic susceptibility measurements, and later compared with metal and ligand solutions. It has been discovered that the Schiff bases with Co(II) ion forms a binuclear complex with a stoichiometry of molar ratio 1:2 from “metal:ligand”. The photodecolorization of this complex was done under UV light for ZnO's suspension solution. The results of this photodecolorization showed that the greatest efficiency was obtained with the use of ZnO dose of 300 mg/100 mL and at an initial pH of 7. The decolorization activation energy for this complex is a small value of 11.289 kJ mol–1. Additionally, the thermodynamic study for this reaction is non-spontaneous, endothermic and less random.
IDENTIFICATION AND QUANTIFICATION OF PHOSPHODIESTERASE-5 INHIBITORS AS ADULTERANTS IN DIETARY SUPPLEMENTS MARKED FOR SEXUAL ENHANCEMENT IN THE LEBANESE MARKET
Authors: SOUBRA RAZAN , GAZY AZZA A. , SAAB MAY , JAMAL MARWA K. AL
Published: March 2020

Objective: Ultraviolet Visible spectrophotometric was adopted to identify and quantify any adulteration with PDE-5 inhibitors (Sildenafil and Tadalafil) in selected dietary supplements used for sexual enhancement in the Lebanese market

Methods: Nine dietary supplements, randomly collected from Lebanese pharmacies, were screened for Sildenafil and Tadalafil using UV-spectrophotometry for both qualitative and quantitative detection.

Results: Tadalafil was detected in one sample at a dose of 59 mg/dosage unit, with the maximal recommended dose being 20 mg. Sildenafil was detected in five samples at doses ranging from 11.7 to 188.2 mg/dosage unit, with the maximal recommended dose being 100 mg.

Conclusion: This study demonstrates that regular analysis of supposed dietary supplements is needed for more effective quality control and health promotion. The method described for the extraction, identification and quantification of Tadalafil and Sildenafil would be useful for regulatory detection of adulterations.
ANTIOXIDANT, METABOLIC AND ANTITUMOR ACTIVITY OF TRITERPENOIDS COMBINATION WITH CYTOSTATICS
Authors: VOROBYOVA OLGA , GRUBOVA ELIZAVETA , BELYAEVA KSENIYA , SOLOVYEVA ANNA , PLOTNIKOVA NADEZHDA , DERYABINA OLGA , MELNIKOVA NINA
Published: March 2020

Objective: To study the effect of betulin derivatives combination with 5-fluorouracil or hydrazine sulfate on the ROS generation, the SOD and LDH activity using rat blood, as well as the effect of combination drugs on Ehrlich carcinoma in experiments on mice.

Methods: We used a chemiluminescence technique to study the ROS generation, and spectrophotometry to determine the MDA level and the SOD and LDH activity. The model of transplanted Ehrlich ascites carcinoma was investigated on mice using a cytological analysis of ascitic fluid cells according to Pappenheim`s method.

Results: In vitro experiments on rat blood at the doses of 2, 5 and 10 μg per ml revealed the dose-dependent effect of combination drugs on the antioxidant properties. In plasma, the ROS generation and the MDA level increased by 10-300% in comparison with control at the doses of 5 and 10 μg per ml only. Still, the SOD and LDH activity in general increased by 10-130% in comparison with control under the action of the studied combination drugs. The study on mice showed the effectiveness of a combination of triterpenoids and cytostatics in Ehrlich ascites carcinoma therapy. The state and behavior of the animals improved, the volume of ascites fluid decreased by 40-50% after treatment for 10 d.

Conclusion: The combination of betulin derivatives with cytostatics can be used as antitumor drugs in Ehrlich ascites carcinoma therapy that is due to metabolic plasticity, increased ROS generation in enhanced antioxidant enzyme protection.
YOGURT; A NOVEL EXCIPIENT (WITH ITS LYSED BACTERIA, AMINO ACIDS, VITAMINS, FATTY ACIDS, AND MINERALS) FOR “TOPICAL DERMATOLOGICAL PRODUCTS” AND FOR “SKIN MICROBIOTA”
Authors: VAIZOGLU M. ORHAN
Published: March 2020

In recent years various Microbiomes (Skin, Gut Lumen) of the human body have attracted the attention of different research groups. In the meantime it has been shown that the conventional therapy of different diseases by making use of antibiotics and similar antibacterial treatments may disturb the harmony of the Skin Microbiome, resulting in dysbiosis. There are efforts of using “live” or “tyndallized (lysed)” probiotics in order to treat different diseases of the skin. It is also known that amino acids are one of the important key elements of the skin. In this paper, a hypothesis for the utilization of yogurt as an excipient for various topical dermatological products will be proposed. Yogurt contains significant amounts of; Probiotics (starter cultures), Amino Acids, Vitamins, Minerals and various Fatty Acids (saturated, monounsaturated and polyunsaturated). Besides, it has been shown that Antimicrobial Peptides (Bacteriocins) are also present in yogurt. Yogurt could eventually be used as an excipient for the production of various topical dermatological products in order to deliver some of the above-mentioned constituents to the Stratum Corneum (Skin) locally.
CSTB‘2020: ПЛАТНОЕ ТВ В ЭПОХУ НАСЫЩЕНИЯ РЫНКА
Authors: Павлова Л. , Попов С.
Published: March 2020

На состоявшейся в конце января в подмосковном ВЦ "Крокус-Экспо" 22-й выставке-форуме CSTB. Telecom & Media‘2020 продолжилась тенденция доминирования тематики медиа относительно телекома.
ПРОГРАММНО ОПРЕДЕЛЯЕМЫЕ СЕТИ ДОСТУПА
Authors: Попов С.
Published: March 2020

В конце минувшей осени компания "ИскраУралТЕЛ" впервые представила российской профессиональной аудитории решения ГК Iskratel в области программно определяемого широкополосного доступа.
PREFERENSI WISATAWAN MILENIAL NUSANTARA PADA DAYA TARIK WISATA SWAFOTO DI BALI
Authors: Rosalina Putu Devi , Susanti Luh Eka , Paramitha Made Widya
Published: March 2020

ABSTRACT

Millennial tourists regards traveling not just about enjoying nature and culture, or strolling around, instead millennials assume that traveling is when immersed in an interesting experience. The purpose of this study is to find out how the preferences of domestik millennial tourists visiting Selfie Tourist Attraction (STA) in Bali, as well as what tourist activities need to be developed. The approach in this research is qualitative, referring to McIntosh's Motivation theory and Leiper's Tourist Attraction Theory. The locus of research is in five STAs including: Twin Hill in Gianyar Regency, Big Garden Corner in Denpasar City, Tukad Badung in Denpasar City, Merta Sari Sanur Beach and Selfie Wanagiri Tourism in Buleleng Regency . Data will be collected through interview and the distribution of 50 questionnaires with accidental sampling. The results revealed that the majority of tourists' motivation to visit is driven by the desire to escape or so-called Fantasy Motivation by 50%, while physical motivation is by 26%, social by 20%, and culture merely by 4%. Furthermore, regarding its preference analysis, domestic millenial tourists are very supportive for the government's performance and enthusiastic for the success of the stakeholders in developing and advancing STA, as seen from the percentage of 94% of tourists choosing to visit by considering the success of the stakeholders in managing STA. In addition, there are a number of tourism activities that need to be developed to optimize the potential of STA, such as: holding cultural events on a regular basis, adding playgrounds for children, adding spots for selfies, and renovating selfie photo spots that are already inadequate. Tourists also argued the need to maintain cleanliness and the addition of public facilities.
ANALISIS KEBUTUHAN DAN PENGEMBANGAN SUMBER DAYA MANUSIA DESA WISATA (STUDI KASUS PADA DESA WISATA JASRI, KABUPATEN KARANGASEM)
Authors: Sudarsana I Ketut
Published: March 2020

Desa wisata memiliki beberapa atraksi wisata, salah satunya adalah Homestay. Homesaty  diminati wisatawan karena dapat mempelajari bahasa, budaya, dan karakteristik penduduk lokal. Salah satu faktor yang dapat memuaskan pelanggan industri pariwisata adalah pelayanan yang diberikan oleh pihak industri khususnya para karyawannya merupakan pihak yang berhubungan langsung dengan pelanggannya. Untuk dapat membuat karyawannya dapat mempertahankan dan memperbaiki kinerjanya maka dibutuhkan faktor-faktor keterampilan dan kompetensi sumber daya manusia yang diperoleh dari pendidikan dan pelatihan, sehingga mereka dapat terus bekerja dengan baik. Berdasarkan uraian di atas maka permasalahan yang dihadapi oleh pemerintah dalam pengembangan desa wisata adalah pemenuhan kebutuhan dan pengembangan Sumber Daya Manusia desa wisata.Lokasi penelitian adalah desa wisata Jasri yang berada di kabupaten Karangasem Bali. Pengumpulan data dilakukan dengan  metode kepustakaan dan metode lapangan dengan wawancara dan observasi. Teknik analisis data yang digunkan adalah Deskriptif Kualitatif.Hasil penelitian menunjukan kebutuhan sumber daya manusia di desa wisata Jasri untuk pengembangan wisata adalah sumber daya manusia yang terkait dengan atraksi wisata dan mensosialisasikan pentingnya kenyamanan, kebersihan, hygine sanitasi kepada seluruh masyarakat. Bentuk pengembangan sumber daya manusia yang sesuai dengan karakteristik masyarakat desa wisata Jasri dengan pengembangan secara informal. Pengembangan secara informal yaitu masyarakat atas keinginan dan usaha sendiri melatih dan mengembangkan dirinya dengan mempelajari buku-buku literatur yang ada
PENGEMBANGAN WISATA BERBASIS PERSEPSI PEGUNJUNG DI KAMPUNG AGROWISATA SENI BUDAYA PASANGGRAHAN UJUNG BERUNG, KOTA BANDUNG
Authors: Nurlena  , Musadad  , Achmad Suryana H
Published: March 2020

Pasanggrahan Art and Cultural Village is a village-based agritourism combining natural tourism with cultural tourism, especially Sundanese culture. The agritourism, located in Ciporeat Hamlet, Pasanggrahan Village, is included in the Bandung City Culture and Tourism Office’s 2018-2023 Strategic Plan, meaning that this tourist destination is already in the local government's development plan. Therefore, this study aims to offer alternatives to the development of agritourism based on the visitor perceptions in order to offer a development concept to the related stakeholders. The data was collected through distributing questionnaires to 50 respondents and conducting interviews with the residents and those who understood the agritourism. The analysis results indicate that the visitors’ bad perception clearly lies in the diversity of tourist attractions, souvenirs, places to eat, and roads within the destination. Therefore, this study focuses the alternative formulations or development efforts on the aspects of what to see, what to buy, what to do, what to arrive, dan what to stay.
MODEL PARKIR BERBASIS AUTOMATIC PARKING SYSTEM PADA KAWASAN PARIWISATA (STUDI KASUS DI DESTINASI WISATA KUTA, BALI)
Authors: Suwintari I Gusti Ayu Eka , Trisna Semara I Made , Sudiarta I Nyoman
Published: March 2020

In the tourism area the vehicle population continues to increase, on the other hand the lack of public facilities that are safe and comfortable as a medium of transportation causes most tourists to prefer carrying private vehicles. Meanwhile tourist attractions in tourist areas are usually centered on a particular location. This will also result in high concentration of vehicles in the area. Then the availability of parking lots is needed. The problem is the need for land for other purposes is also increasing and the availability of vacant land is also limited. Resulting in several problems such as parking on the roadside which will then hamper vehicle circulation activities. The research objective is to identify parking system problems in the Kuta tourism area and create ideas in the direction of the development of parking infrastructure referring to the development of multi-storey parking buildings (Vertical) with the application of the parking system system with APS (Automatic Parking System) technology. This research is a research with a qualitative descriptive analysis approach which is done by data collection techniques through direct observation, document studies, and literature studies.
SCIENCE LEARNING IN PRIMARY SCHOOL IN THE PERSPECTIVE OF NATURE OF SCIENCE: A CASE STUDY IN THE FIFTH GRADE
Authors: Fasha Linda Hania
Published: March 2020

The case study of elementary school science learning is performed in the fifth grade of a primary school located in Bandung. The study aims to describe the extent to which the nature of the sains principle is identified through classroom learning. In this study, the data used include the document of learning draft, teacher’s point of view towards science and its learning, learning activities documentation, and school principal’s point of view about learning in general including the expectation towards science learning. In terms of the main objective of science learning, students’ initial ideas about science triggered in the context of learning problems used can be explored properly through answers to questions raised by the teacher as well as students’ conclusions or statements on the studied problem. The study has successfully identified seven aspects of the nature of science in learning, although the depth and wholeness of these aspects still need further development in the future. Based on the result of the study, it is concluded that a progressive effort is still needed to improve teachers’ beliefs system and their learning.
Caracterización de la actividad demostrativa en estudiantes de educación superior
Authors: Hernández-Suarez César Augusto
Published: March 2020

Se presenta una investigación sobre la situación de la actividad demostrativa en estudiantes de educación superior (Programa Académico de Licenciatura en Matemáticas e Informática de la Universidad Francisco de Paula Santander), durante el segundo semestre de 2008. Esta surge a raíz del desconocimiento del tema y de la presencia de deficiencias en los estudiantes como el desconocimiento y/ mal uso del lenguaje y la simbología propia de la matemática, las reglas de la lógica, la poca capacidad de razonamiento y de resolución de problemas, lo que conlleva a tener dificultades para entender y hacer una demostración. Por otro lado, se desconocen sus actitudes y creencias respecto a la actividad demostrativa; y si estas, intervienen en su rendimiento académico y afectan su formación matemática. Los resultados obtenidos muestran que aunque los estudiantes tienen una buena predisposición en actitudes y creencias hacia la actividad demostrativa, el conocimiento y uso del lenguaje matemático y la habilidad para hacer demostraciones no es lo satisfactorio. No se evidencia que haya diferencias en cuanto la edad ni al género, pero “aparentemente” se observa que el estudiante mejora, en estos aspectos, a medida que avanza en cada una estas asignaturas. Finalmente se dan unas orientaciones para empezar a mejorar la situación hallada.
valoración en matemáticas de la educación secundaria a la universitaria, perspectivas docentes
Authors: Mariño Luis Fernando
Published: March 2020

Intentando buscar alternativas diferentes a culpar siempre al estudiante acerca de la problemática que suscita el bajo rendimiento en matemáticas iniciando su pregrado, la educación media y pruebas estandarizadas aplicadas por el estado, se realizó una investigación de campo con una muestra no probabilística con el objetivo de analizar ycontrastar los principios que orientan a un grupo de docentes de los dos últimos años de colegios públicos y Universidad Francisco de Paula Santander organizando la evaluación del conocimiento matemático en la ciudad de Cúcuta durante el año 2008. El trabajo se orientó por los acercamientos teóricos de Web (1992), quien intenta construir una teoría para la valoración en matemáticas, los instrumentos fueron el cuestionario y la encuesta estructurada. Entre los principales hallazgos se pueden citar: Si bien casi todos los docentes coinciden en que la matemática debe enseñarse como un cuerpo estructurado de conocimientos, esto difiere respecto a sus opiniones sobre la forma como los estudiantes aprenden matemáticas y las estrategias aplicadas en el proceso de enseñanza. Acerca de los principios que los orientan organizando actividades de evaluación, consideran posible otras formas diferente a la prueba escrita (un proyecto a lo largo de varios días o la entrevista), el rol que juega el docente al momento de aplicar pruebas, al instante de analizar y presentar información debe haber alternativas distintas a la emisión de un sólo veredicto sea cuantitativamente o cualitativamente, estipulan también que la valoración debe ser un proceso continuo y no terminal en la enseñanza y aprendizaje de esta área.
Propuesta de actividades para la enseñanza de las ecuaciones diferenciales, con variables separables mediante el apoyo de software libre “geogebra”
Authors: Jaimes-Contreras Luis Alberto , Chaves-Escobar Rafael Felipe
Published: March 2020

La nueva pedagogía viene realizando grandes aportes con el propósito de mejorar los procesos de enseñanza aprendizaje en la educación, sin embargo según Morales Lopez y Salas Huertas (2010) en el estudio de las ecuaciones diferenciales (ED) actualmente “predomina el enfoque algebraico como reflejo de la primera forma que se tuvo de resolver estos problemas” y que algunos docentes emplean como estrategia didáctica.
Los procesos cognitivos en la resolución de problemas clásicos de máximos y mínimos en estudiantes de ingeniería Civil de la universidad Francisco de Paula Santander
Authors: Hernández Rosa Virginia
Published: March 2020

El propósito de la investigación estuvo centrado en intentar conocer los procesos cognitivos de un grupo de estudiantes cuando estuvieron enfrentados a la resolución de problemas clásicos de máximos y mínimos, se optó por la investigación cualitativa en la tipología estudio de casos; cinco estudiantes y cinco profesores voluntarios fueron los informantes, la entrevista a profundidad sirvió como instrumento para recolectar la información, los referentes teóricos que orientaron y dieron sentido al estudio fueron la entrevista clínica de Piaget, la resolución de problemas de Polya y la Modificabilidad cognitiva de Feuerstein.

Entre los principales hallazgos luego de triangular los datos evidenciaron dificultades en aspectos como conductas impulsivas y no planificadas, carencia o deficiencia de orientación espacial y temporal, no discriminan entre información relevante e irrelevante, el carecer de conductas comparativas impide diferenciar la importancia de unos datos frente a otros, no organizan sistemáticamente la información; por tanto no establecen orden, relaciones y atributos, el no tratar la situaciones como un todo y la conducta impulsiva les impide ir más allá de su experiencia perceptual para obtener deducciones lógicas de tal forma que puedan generar hipótesis, defendiendo y argumentando sus puntos de vista, esto fue la constante en las fases de entrada, elaboración y salida.
El aprendizaje del cálculo y nuevas tendencias en su enseñanza en el aula de matemáticas
Authors: Hitt Fernando
Published: March 2020

Los problemas de aprendizaje del cálculo han sido documentados desde hace varias décadas por los investigadores en didáctica de las matemáticas. Un gran esfuerzo en ese sentido lo ha proporcionado el grupo llamado "pensamiento matemático avanzado". Si bien el grupo ha propiciado una gran perspectiva sobre los problemas de aprendizaje del cálculo, el problema persiste del lado de la enseñanza. Entre los cambios realizados en el currículum promovidos por la investigación en didáctica del cálculo se pueden detectar tres grandes variantes. Una, ligada al impulso de las teorías sobre representaciones, que ha enfatizado los procesos de conversión entre representaciones, otra, ligada a métodos de enseñanza incluyendo tecnología; y una, más reciente, que enfatiza los procesos dela modelación matemática. Esta última, se perfila en la enseñanza del cálculo introduciendo situaciones problema (situaciones paradigmáticas) que tengan que ver directamente con la modelación matemática y uso de tecnología.
Reflexión sobre algunos conceptos clave de la investigación en educación Matemática: didáctica, concepto, competencia, esquema y situación
Authors: D’Amore Bruno , Fandiño Pinilla Martha Isabel
Published: March 2020

La Educación Matemática, como campo disciplinario para la producción de conocimientos en torno a los procesos de enseñanza-aprendizaje de la Matemática, se consolida cada vez más en el ámbito internacional. Múltiples son los estudios que se llevan a cabo en los diferentes países; esto ha generado el uso con diferentes significados de varias expresiones, tales como Didáctica, Concepto, Competencia, Esquema, Situación, entre otros. En este breve ensayo, el autor lleva a cabo algunas reflexiones que pretenden clarificar, desde cierta perspectiva, los significados de estos términos clave que aparecen a menudo en los textos que se ocupan de la investigación en Educación Matemática.

 

Palabras clave: didáctica de la matemática, concepto, competencia, esquema, situación.

 

Abstract

Mathematics Education, as a disciplinary field for the production of knowledge around the teaching-learning processes of Mathematics, is increasingly consolidated in the international arena. There are multiple studies that are carried out in different countries; this has generated the use with different meanings of several expressions, such as Didactics, Concept, Competence, Scheme, Situation, among others. In this brief essay, the author carries out some reflections that seek to clarify, from a certain perspective, the meanings of these key terms that often appear in the texts that deal with research in Mathematics Education.

Keywords: mathematics didactics, concept, competence, scheme, situation.

 

Resumo

A Educação Matemática, como campo disciplinar para a produção de conhecimento em torno dos processos de ensino-aprendizagem da Matemática, está cada vez mais consolidada na arena internacional. Existem vários estudos que são realizados em diferentes países; Isso gerou o uso de diferentes significados de várias expressões, como Didática, Conceito, Competência, Esquema, Situação, entre outros. Neste breve ensaio, o autor realiza algumas reflexões que procuram esclarecer, de certa perspectiva, os significados desses termos fundamentais que geralmente aparecem nos textos que lidam com a pesquisa em Educação Matemática.

Palavras-chave: didática de matemática, conceito, competência, esquema, situação.
Actividades exploratorio investigativas en clases de matemáticas
Authors: Limas Berrio Leidy Johana , Jiménez Espinosa Alfonso
Published: March 2020

Resumen: Este artículo de revisión define las actividades exploratorio investigativas, las tareas investigativas y las aulas investigativas o investigaciones matemáticas y sus características, para lo cual comienza revisando algunos términos de uso común en el aula de clase de matemáticas, como son ejercicio, problema y situación problema; justamente para establecer diferencias con las primeras. Además se detallan los roles, tanto del docente como del estudiante en el desarrollo de este tipo de actividades; también se presenta algunas particularidades de una investigación matemática. Finalmente se muestra un amplio estado de la cuestión sobre investigaciones que se han realizado acerca de actividades exploratorio investigativas y sus contribuciones en la enseñanza y el aprendizaje de las matemáticas.Palabras clave Actividades exploratorio investigativas, tareas exploratorio investigativas, investigación matemática.Abstract: This review article establishes the exploratory research activities, investigation tasks and study rooms or mathematical investigations, and their characteristics, in order to begin reviewing the use of common terms in the classroom, such as exercise, problem and problem solving, precisely in order to distinguish, it is made to establish some differences from the initial activities. Moreover, it highlights the student and teacher roles in the development of such activities. The article also presents some specific mathematics research. Finally, it demonstrates an open attitude to the theme in question, whilst considering the preexisting research into exploratory research activities and its contribution to the teaching and learning processKeywords Exploratory activities, exploratory tasks, mathematical research
Implementación del modelo matemático para el sistema de control de una incubadora para aves utilizando la herramienta computacional MATLAB® - SIMULINK®
Authors: Restrepo-Chaustre Yesenia , Bermudez-Santaella Jose Ricardo
Published: March 2020

En el presente artículo se describe la implementación del modelo matemático de unaincubadora para aves, realizada por el ingeniero José Ricardo Bermúdez Santaella ensu maestría “Automatización e instrumentación”[1], en donde se involucra el área decontrol y el manejo de la herramienta computacional MATLAB® - SIMULINK®.De igual manera, se describe el proceso necesario para llevar a cabo la implementacióndel modelo matemático, teniendo como base las variables involucradas en la incubaciónde aves para realizar la selección de la estrategia de control, y adicionalmente el tiempode respuesta, sensibilidad y robustez de la variable controlada.Para finalizar se utiliza la herramienta computacional en la sintonización del controladorrecurriendo al método de lazo abierto de Ziegler-Nichols[2] o curva de reacción.
Estudio cuasi-experimental en la aplicación de metodos cooperativos para la enseñanza de la asignatura en filosofia
Authors: Medrano-Lindarte Carmen Teresa , Araque-Correa Elbert Isaias
Published: March 2020

La investigación se realizó con 62 adolescentes (mujeres y hombres) de educaciónmedia vocacional del grado décimo, de los cuales 29 corresponden al grado décimo B y33 al grado décimo A del colegio de Nuestra Señora de las Mercedes del Municipio deSardinata, por medio de un diseño cuasi- experimental con un grupo experimental, ungrupo control y con pruebas post-tes, en los dos grupos se investigó la influencia queen el aprendizaje de concepto y rendimiento académico tiene la aplicación de métodoscooperativos para la enseñanza de la asignatura en filosofía. El grado de conceptualizacióny rendimiento académico fue medido mediante pruebas – postest con una confiabilidadde 80% la cual se obtuvo mediante método de mitades partidas. Se aplico la pruebade Shapiro-Wilk para muestras menores de 50 y se encontró, previa validación de lossupuestos de normalidad, A demás las distribuciones de las calificaciones de los dosgrupos presentan la misma varianza con un valor de p= 0.073 en la prueba de Leveney que existe una diferencia significativa entre las calificaciones de los dos grupos (p=0.000 prueba t).
Construcción de la integral por recorrido para la teoría de Dirac a través de las transformaciones de Fourier de las funciones de Green
Authors: Santiago-Angarita José Libardo
Published: March 2020

Una estructura de la integral por recorrido para el electrón relativista es propuesta en este trabajo. En la construcción de esta integral es utilizada la ecuación de Einstein-Smolukhovski y las transformaciones de Fourier para cada una de las funciones de Green. Se hace un análisis de esta integral para tres, cuatro y N puntos fijos en la trayectoria del electrón.
Reto al ingenio probabilístico: una propuesta didáctica para la enseñanza-aprendizaje de las probabilidades
Authors: Gandica-de-Roa Elizabeth
Published: March 2020

Esta investigación se orienta hacia la utilización de juegos inéditos de mesa, como herramienta metodológica de apoyo al proceso de enseñanza de probabilidades, propuestos por estudiantes de Estadística en Ingeniería Industrial de la Universidad Experimental Nacional del Táchira (UNET).

El proyecto surge como estrategia para mejorar las dificultades de aprendizaje de modelos de probabilidad, dirigido a disminuir el alto índice de reprobados en el tema, además de ampliar las potencialidades intelectuales y creativas del alumno, involucrándole en un proceso recreativo que impulsa habilidades de razonamiento, creatividad y procesamiento lógico estadístico. Diversos autores han mostrado que a través del diseño de juegos de mesa didácticos, enfocados a “aprender jugando”, se puede lograr un aprendizaje significativo, divertido y prolífero.

Además de inducir creatividad e ingenio, los cuales constituyen pilares fundamentales en los estudios de Ingeniería. En este ambiente, los estudiantes inventan el juego de azar, establecen sus reglas, diseñan sus entidades y tablero, y plantean interrogantes mediante la identificación de relaciones entre el juego y los conceptos de teoría de probabilidades aprendidos durante las clases impartidas. El juego debe contener distintos planteamientos teóricos, los cuales requieren ser resueltos por los jugadores para avanzar en el mismo.

A través del desarrollo del juego se realizan evaluaciones sobre conceptos propios de la asignatura, lo cual resulta en una propuesta didáctica innovadora, que estimula el aprendizaje y adquisición de conocimiento que ayuda a reducir temores hacia el cálculo e interpretación de los eventos probabilísticos.
Las tecnologías de la información y la comunicación (tic) en la Universidad Francisco de Paula Santander
Authors: Espinosa-Castro Jhon Franklin
Published: March 2020

Las tecnologías de información y comunicación (TIC), hoy en día están estableciendo un cambio en el ser humano, especialmente en el sistema educativo universitario en el proceso de enseñanza y aprendizaje, donde se debe utilizar y aplicar con eficacia. Para ayudar a los estudiantes adquirir las habilidades necesaria en agrupan los elementos y las técnicas utilizadas en el tratamiento y la transmisión de las informaciones, principalmente de informática, internet y telecomunicaciones. Teniendo en cuenta lo anterior, en la Universidad Francisco de Paula Santander no se encontró ningún registro acerca de las tecnologías de la información y la comunicación (TIC). Debió, a que no se establecen investigaciones, e igualmente los estudiantes no tienen conocimiento en la utilización y aplicación, dentro de las diferentes carreras que establecieron información. Debió, que el 73% de los estudiantes encuestados, utiliza el internet de la UFPS para realizar diferentes actividades. Además, acceden al servicio utilizando un portátil en las zonas verdes, cubículos, salones o en los corredores de los edificios, en especial las zonas verdes, porque es el lugar que presenta una mejor cobertura. Asimismo, 436 estudiantes de 1000 establecen una calificación de 3 en una escala de 1 a 5. Donde la comunidad universitaria utiliza el servicio de internet en chat, redes sociales, música y juegos. Al mismo tiempo, se espera que de esta investigación, propongan alternativas para mejorar la calidad de la enseñanza y aprendizaje, ya que los estudiantes necesitan conocer las ventajas que aportan las TIC para trabajar con éxito los avances tecnológicos.
The effectiveness of governance mechanisms in emerging markets: A review
Authors: Refakar Mohammad , Ravaonorohanta Nivo
Published: March 2020

Corporate governance has advanced hugely in the last two decades and many governance best practices have emerged that focuses on measures companies should take in order to improve their governance. These suggested mechanisms are effective in developed markets because they are a remedy for problems that occur in those markets. But are these mechanisms also effective in emerging markets? By reviewing the literature, this paper critically discusses and compares the effectiveness of governance mechanisms (both internal and external) in emerging and developed markets and finds that while the classic mechanisms such as board structure and independence are not effective in emerging markets, there exist some alternative mechanisms such as external audit or dividend policy that are more effective.
Telescopic Listening
Authors: Eivind Buene
Published: March 2020

In contemporary music, the ethos of experimentation and newness is constantly confronted with a strong historical presence. The historical residue in the apparatus of production and dissemination can be found in the instrumentation, institutions and formats of performance. Certain periods in time, like that of post-war modernism tried to eviscerate that residue, other periods have seen a keen interest in evoking history, for a variety of reasons. Eivind Buene’s ongoing project Schubert Lounge probes notions of historicity in an explicit way, taking songs of Franz Schubert as a starting point for the investigation. The work challenges the idea of authenticity in musical performance through applying methodologies from one layer in time to materials from a different historical moment. In the project he tries to create a multi-layered experience through a process of ‘telescopic listening’, as different modes of interpretation and creation is brought into conflict in a staged work for singers, ensemble and turntable with recorded sound.
Lineage
Authors: Otto Ramstad
Published: March 2020

The project Lineage draws lines between the learning practices of experimental dance and somatic work, and personal ‘artistic genealogy’. ‘Artistic genealogy’ is a creative process Ramstad has been using to build relationships to his Norwegian ancestors and the land they inhabited and about which he knew very little. Lineage strings together these seemingly separate ways of gaining knowledge: official archives and private stories, his archive of somatic approaches and attempts to research land somatically – to think about what it was like to live in a body in rural Norway 100 years ago and ask how this affects how we are living in our bodies now. This exposition reflects a project that includes a video installation, a studio practice, and a performance which uses his archive of videos, stories, and movement. Here he shares thoughts about how we care for and engage in our personal histories and
how this engagement changes how we are living in our bodies now.

In this exposition you will see or hear the following people, listed in their order of appearance: Otto Ramstad, Lisa Nelson, Maura Gahan, Margit Galanter, Kristin Van Loon, Steve Paxton, Emmett Ramstad, Hans Steinar Gjerdet, Carle Lange, Olive Bieringa, Uma Rabbit Bieringa Ramstad, Andrea Parkins.
Análise de custo-minimização da troca entre medicamento referência e biossimilar (infliximab): sustentabilidade na relação tratamento vs. sistema de saúde suplementar
Authors: Ramires Yohanna , Tartari De Oliveira Bruna Mariana , De Sousa Fernando Miguel , Lind Jolline , Ganem Longhi Joy , Lopes Rocha Jaime Luis
Published: March 2020

Introdução: Infliximab (IFX) é um anticorpo monoclonal, amplamente empregado no tratamento de doenças autoimunes.  No entanto, seu elevado custo é um fator limitante de acesso à terapia. Com o advento dos biossimilares (BSM), cópias autorizadas de medicamentos biológicos referência, e seus custos reduzidos, esta realidade pode ser modificada. A partir da troca entre um medicamento referência pelo seu BSM é esperada economia significativa, com a mesma resposta clínica, contribuindo para uma relação sustentável entre o sistema de saúde e o acesso ao tratamento. Objetivo: avaliar o impacto financeiro a partir de análise de custo-minimização, das versões referência e biossimilar do IFX em uma operadora de plano de saúde com mais de 500.000 vidas em Curitiba, Paraná. Metodologia: estudo retrospectivo e descritivo, seguido de análise de custo-minimização entre os beneficiários que fizeram uso de IFX, de 1 de janeiro de 2016 a 31 de dezembro de 2017, através de dados secundários extraídos do sistema informatizado da operadora. Avaliou-se possível permutaentre as drogas a fim de descrever a economia da hipotética substituição. Estabeleceram-se como critérios de exclusão o pagamento indevido da tecnologia, não pagamento e glosas justificadas. Após exclusão, calcularam-se despesas individuais e totais do IFX através dos custos das apresentações. Custos diretos e indiretos de materiais e profissionais envoltos no cuidado não foram incorporados ao cálculo. As análises econômicas foram conduzidas através do software Excel®, versão 2007. Resultados: evidenciou-se que 185 pacientes, totalizando 1.441 liberações, fizeram uso de IFX referência no período avaliado. Destas, 31 liberações foram excluídas devido aos critérios devidamente estipulados. Por fim, 1.410 liberações foram incluídas no estudo. A análise de custo identificou utilização de 5.354 frascos de IFX referência, por 13 especialidades, totalizando R$ 22.937.911,30 de despesas, que incluem valores pagos pela tecnologia e taxas de infusão, e média de R$ 16.268,02 (±R$ 4.257,91) por liberação e R$ 123.988,71 (±R$ 84.855,52) por paciente. Quando aplicada a mudança hipotética, o custo ajustado passa a R$ 16.099.739,66, média de R$ 11.418,26 (±R$ 2.975,37) e R$ 87.025,62 (±R$ 59.419,06) por liberação e beneficiário, respectivamente. Perfazendo um valor diferencial de R$ 6.838.171,64 na suposta economia de recursos. Conclusão: a análise econômica no tratamento com imunobiológicos mostra-se extremamente relevante, pois contribui com o melhor uso da terapêutica de custo elevado garantindo a sustentabilidade do sistema de saúde. Medicamentos BSM apresentam-se como uma opção custo-minimizatória em comparação com o tratamento referência para saúde suplementar.