bluuebunny/crossref_metadata_2025 huggingface dataset:
BIOLOGICAL EFFECTS OF SILICON OXIDE NANOPARTICLES ON BROILER CHICKEN
Authors: Nikulin Vladimir , Mustafina Aleksandra
Published: May 2020

The aim of the study is to increase the productive qualities of broiler chickens by including ultrafine silicon oxide into main diet. During the experiment, the biological effect of ultrafine silicon oxide on broiler chickens was estab-lished. Use of ultrafine SiO2 particles for poultry feeding contributed to an increase in the number of red blood cells and content of total protein and albumins. By the end of the experiment, the number of red blood cells in birds in-creased by 17.43% (P≤0.001) – in the blood of birds of the first experimental group, 16.51% (P≤0.01) – the second one, 20.80% (P≤0.001) – the third experimental and 21.71% (P≤0.001) – the fourth experimental group, compared with the indicator of the control group. The amount of total protein in blood serum of chickens of the first and the second experimental groups increased by 1.36-1.39 %, in the third and fourth ones there was a significant (P≤0.05) increase by 5.45 and 3.05%, respectively. The blood glucose content of chickens in the experimental groups is higher by 8.04-23.65% compared to this indicator with ones in the control group. During the experiment feed con-sumption per 1 kg gain of live weight decreased: in the first experimental group by 3.00 % in the second by – 0.50 %, the third – 6.00 % the fourth– by 4.50 %, compared to this with the control group. The chicken’s vibrancy of the first the experimental group was higher by 4.77 %, the second – by 6.20 %, the third – by 19.25 % and the fourth– by 11.59% than in the control one. Consequently, when converting the feed energy into the body energy of a broiler chicken, the energy conversion coefficient of the experimental group of poultry is higher than that of the control one by 7.16-21.76 %. Thus, the most optimal dose for further research was determined.
Self-Sexual de jovens adultos brasileiros
Authors: Azevedo e Souza Leo Schuch de , Boeckel Mariana Gonçalves
Published: May 2020

Self-sexual é um constructo auto percebido multifacetado, que inclui eficácia sexual, autoestima sexual-corporal, sensação de direito a receber prazer de si e do(a) parceiro(a), e autorreflexão-sexual. O presente estudo investigou o self-sexual de jovens adultos brasileiros, avaliando a correlação entre self-sexual e as escalas de satisfação com a vida e de autoestima geral, assim como o impacto da religiosidade no self-sexual. 1380 participantes, de 18 a 30 anos, completaram uma pesquisa online que incluiu o Inventário de Self-sexual. O delineamento foi quantitativo, descritivo e transversal. Todas subescalas do iss obtiveram correlação positiva com as escalas de satisfação com a vida e de autoestima geral. Algumas subescalas apresentaram correlação negativa com religiosidade, embora a subescala de auto-estima sexual tenha obtido correlação positiva. As mulheres obtiveram escores significativamente maiores nas subescalas de sensação de direito a receber prazer de si e do(a) outro(a). As mulheres bissexuais se destacaram com maiores resultados em comparação a homens e mulheres heterossexuais, apesar de apresentarem menores níveis de autoestima. Pesquisas futuras com variáveis e amostras mais diversas podem contribuir para a continuidade da compreensão desse constructo.
La determinación social del autismo en población infantil ecuatoriana
Authors: López Chávez Catalina , Larrea Castelo María de Lourdes , Breilh Jaime , Tillería Ylonka
Published: May 2020

Introducción: la determinación social del autismo es un análisis desde la perspectiva de la epidemiología crítica, cuyo objetivo es entender el autismo de forma integral, es decir, desde su realidad individual y colectiva. El propósito del estudio fue identificar las condiciones y las características diferenciales de las familias de niños con y sin autismo. Analizar cómo estas condiciones están presentes con mayor o menor fuerza, tanto en los casos como en los controles, para profundizar en el conocimiento de la situación de la población infantil autista en el país. Evaluar los procesos protectores y destructivos que los rodean y levantar hipótesis para confrontarlas en futuros estudios. Desarrollo: se trata de comprender cómo estas lógicas de poder se expresan en procesos destructores o protectores del metabolismo sociedad-naturaleza en sus modos de vida y de analizar cómo estos pueden intervenir en el genotipo y en el fenotipo. Un estudio transversal fue realizado en 2016 con 69 niños diagnosticados con autismo y 91 niños neurotípicos, en una edad comprendida entre 2 y 12 años, provenientes de Quito y Guayaquil. La investigación reveló que un 56.5 % de la población autista se ubicó en la capa media (Quito) y pobre (Guayaquil), condición que limitó su acceso al diagnóstico temprano; el 73.4% de los padres detectó los signos de alarma antes de los 3 años y acudió al pediatra, sin poder obtener un diagnóstico acertado. La población de la capa pobre presentó un mayor porcentaje de comorbilidades que las registradas en la capa media. El gasto requerido fluctuó entre 100 y 25 mil dólares, según la inserción social. Conclusión: estos resultados muestran una clara diferenciación entre los modos de vida, de acuerdo con la condición socioterritorial de la muestra.
Losing Touch: An Embodiment Perspective on Coordination in Robotic Surgery
Authors: Sergeeva Anastasia V. , Faraj Samer , Huysman Marleen
Published: May 2020

Because new technologies allow new performances, mediations, representations, and information flows, they are often associated with changes in how coordination is achieved. Current coordination research emphasizes its situated and emergent nature, but seldom accounts for the role of embodied action. Building on a 25-month field study of the da Vinci robot, an endoscopic system for minimally invasive surgery, we bring to the fore the role of the body in how coordination was reconfigured in response to a change in technological mediation. Using the robot, surgeons experienced both an augmentation and a reduction of what they can do with their bodies in terms of haptic, visual, and auditory perception and manipulative dexterity. These bodily augmentations and reductions affected joint task performance and led to coordinative adaptations (e.g., spatial relocating, redistributing tasks, accommodating novel perceptual dependencies, and mounting novel responses) that, over time, resulted in reconfiguration of roles, including expanded occupational knowledge, emergence of new specializations, and shifts in status and boundaries. By emphasizing the importance of the body in coordination, this paper suggests that an embodiment perspective is important for explaining how and why coordination evolves following the introduction of a new technology.
NA MÁQUINA DO TEMPO DE PAPEL: COMBA MALINA E A IMPORTÂNCIA DA FICÇÃO CIENTÍFICA DE DINAH SILVEIRA DE QUEIROZ
Authors: Lousa Pilar Lago e , Rüsche Ana
Published: May 2020

Durante quatro décadas de intensa produção, Dinah Silveira de Queiroz (1911-1982) publicou quase 20 livros e teve uma carreira literária recheada de prêmios. Versátil, a autora escreveu contos, romances, crônicas e produziu conteúdo para rádio e jornal. Pioneira, integrou a primeira onda da Ficção Científica brasileira. Atuou de maneira fundamental na luta pelo ingresso das mulheres na Academia Brasileira de Letras e, em 1981, tomou posse como imortal. Sem se eximir do debate, problematizou questões importantes em sua obra, como o lugar da mulher na sociedade, as dinâmicas coloniais excludentes e fez críticas aos regimes ditatoriais. Mesmo com tamanha expressividade no meio literário, a autora ainda é pouco lida na atualidade. Entre viagens interplanetárias e diálogos telepáticos, propomos, nesse estudo, partir de seu livro Comba Malina (1969) para entender: a inserção da escritora na Ficção Científica Brasileira; os motivos de seu apagamento; as rupturas e permanências propostas por sua escrita; e a importância do resgate de sua produção.
ANÁLISIS A PRIORI DE UN INSTRUMENTO DE EVALUACIÓN SOBRE DIVISIBILIDAD DE NÚMEROS ENTEROS CON ANÁLISIS ESTADÍSTICO IMPLICATIVO
Authors: Espinoza Ricardo Fabián , Caputo Liliana Noemí , Bordón Paula Daniela , Ayala María Rocío , Porcel Eduardo Adolfo
Published: May 2020

DOI: 10.12957/cadest.2019.46087Se presenta el análisis a priori de un cuestionario sobre divisibilidad de números enteros, mediante Análisis Estadístico Implicativo. Para realizarlo se construyó una matriz booleana en cuyas filas se consignaron los saberes requeridos para resolver los ítems en evaluación; éstos constituyen las columnas de la matriz Luego se realizó un análisis de similaridad de las variables determinándose cuatro clases de cuasi-equivalencia. Finalmente se construyó el grafo implicativo correspondiente a cada una de ellas a fin de establecer que relaciones de tipo causa-efecto existen entre las variables. Este estudio servirá de referencia para analizar, con la misma metodología, las respuestas de los alumnos que sean evaluados con este instrumento.Palabras clave: Análisis Estadístico Implicativo - Análisis a priori – Divisibilidad - Matriz MAP - Árbol de similaridad - Cuasi-implicaciones.
Networks and evidence-based advocacy: influencing a policy subsystem
Authors: Nichols Naomi , Malenfant Jayne , Schwan Kaitlin
Published: May 2020

Background:

Timely access to relevant and trustworthy research findings is an important facilitator of research use. But the relational aspects of evidence generation, mobilisation and use have been insufficiently explored.

Aims and objectives:

Our aim is to describe the strategic communicative and relational work of two intermediary organisations playing thought leadership roles within a large, heterogeneous and loosely configured network comprised of individuals and organisations from the following sectors: academia, frontline service delivery, philanthropic funding, advocacy organisations and government.

Methods:

The data for this project were generated as part of a study of the ways social science research influences policy, practice and systems-change processes. Proceeding from the standpoints of people who generate and/or engage with research in an effort to address homelessness in Canada, this article focuses on the intersections of research, strategic communication and policy making.

Findings:

Our findings suggest that strategic communication and knowledge exchange play integral roles in efforts to create evidence-based policy change. These communicative activities take the form of public-facing political and/or media engagement strategies, traditional knowledge mobilisation activities and continuous informal and timely exchanges of information between trusted allies.

Discussion and conclusions:

Our study reveals the importance of a heterogeneous network structure, with formal and informal alliances between individuals and organisations, as well as key intermediary organisations through which knowledge can be strategically mobilised within the network to serve policy change aims. Furthermore, our study suggests that interest in evidence-led governance is shifting the boundaries between research, advocacy and government action.
Introduction to the themed section: law, harm and depletion through social reproduction
Authors: Rai Shirin M. , Goldblatt Beth
Published: May 2020

In this article, we outline an interdisciplinary exploration into the invisibilisation of social reproduction, most of which still continues to be done by women. In this introduction and themed section, we argue that the neglect of social reproduction has material costs for those responsible for it, which we theorise as ‘depletion through social reproduction’ (Rai et al, 2014) – and these costs are gendered. As a facet of governing processes, the law is important here. In this themed section, we examine the issue of law, harm and depletion through social reproduction to show how different strategies are already being used by individuals, households and communities to mitigate depletion and how this is being addressed (or not) at the policy and legal levels – local, national and international. To explore this issue, we have brought together sociologists, political economists and lawyers to develop insights that can be of value to political scientists and to the policy community.
Design and experiment of a soft-edge aperture with high light energy utilization efficiency and uniformity
Authors: Liu Liwei , Shi Lifang , Cao Axiu , Pang Hui , Yan Wei , Pang Yingfei , Xue Li , Liu Wenjing , Deng Qiling
Published: May 2020

Soft-edge apertures can be used to suppress the diffraction effect to achieve high beam quality. In this study, an optimal design theory was proposed to design a serrated soft-edge aperture (SSA) that could produce a beam with high light energy utilization efficiency and uniformity. Two parameters of the peak-to-average ratio (PAR) and the light energy utilization efficiency were introduced as the criteria for evaluating the soft-edge aperture (SA) performance. By analyzing the influence of the shape, number, and height of the serrated structure on the beam propagation performance, the relationship between the PAR, light energy utilization efficiency, and the structural parameters of the aperture were established. After that, an optimal design method of the SSA was proposed, based on the theory of Fresnel diffraction. The designed SSA was fabricated by lithography, and an optical configuration was constructed to test the effect of the aperture. In the experiment, the light energy utilization efficiency is greater than 92%, the PAR is less than 1.4, and the root mean square error of the PAR curve is 0.3502, indicating that the beam maintains high light energy utilization efficiency and uniformity during propagation.
Low-noise radio over graded-index plastic optical fiber
Authors: Inoue Azusa , Koike Yasuhiro
Published: May 2020

We developed a graded-index plastic optical fiber (GI POF) that enables lower-noise radio frequency (RF) transmission than conventional multimode fibers for short-distance household applications (

<

100

m

). It is shown that reflection noise degrades RF transmission, regardless of the carrier frequency, through the spurious generation that accompanies the RF modulation of a vertical-cavity surface-emitting laser. The GI POF with distinctive mode coupling, which is closely related to its microscopic polymer structure, suppresses noise and spurious generation to improve transmission quality. Our low-noise radio-over-GI-POF technology will offer significant advantages for optical wiring systems for broadcast and communication in small- and medium-scale buildings.
High-dimensional angular two-photon interference and angular qudit states
Authors: Puentes Graciana
Published: May 2020

Using angular position–orbital angular momentum entangled photons, we propose an experiment to generate maximally entangled states in D-dimensional quantum systems, the so called qudits, by exploiting correlations of parametric down-converted photons. Angular diffraction masks containing N angular slits in the arms of each twin photon define a qudit space of dimension N2, spanned by the alternative pathways of the photons. Numerical results for N angular slits with N = 2, 4, 5, 10 are reported. We discuss relevant experimental parameters for an experimental implementation of the proposed scheme using Spatial Light Modulators (SLMs), and twin-photons produced by Spontaneous Parametric Down Conversion (SPDC). The entanglement of the qudit state can be quantified in terms of the Concurrence, which can be expressed in terms of the visibility of the interference fringes, or by using Entanglement Witnesses. These results provide an additional means for preparing entangled quantum states in high-dimensions, a fundamental resource for quantum simulation and quantum information protocols.
A soberania alimentar que desperta e aprofunda os saberes em direitos por terra, por comida de verdade e por igualdade de gênero
Authors: Tassi Érika Maria Marcondes , Bezerra Islandia
Published: May 2020

Soberania Alimentar é compreendida como sendo o direito dos povos de definir suas próprias políticas voltadas aos sistemas alimentares (produção, distribuição, comercialização, acesso, consumo e aproveitamento biológico), bem como protegê-lo e regulamentá-lo sob a ótica da sustentabilidade. Nesse sentido, a produção de alimentos agroecológicos em sinergia com a natureza possibilita o resgate de práticas sobre o que produzir e o que comer. O cenário que se desenhou foi o resgate de práticas de produção-consumo das Plantas Aimentícias Não Convencionais (PANC) como ponto central de problematização. Neste relato de experiência, refletimos sobre soberania alimentar a partir de distintas dimensões. Assim, temas como a participação das mulheres no cotidiano alimentar, as PANC como impulsionadoras da sociobiodiversidade e o resgate da alimentação tradicional e saudável inspiraram o debate. Para tanto, foi realizado um breve levantamento teórico sobre os temas e, na sequência, foi realizada uma Roda de Conversa. Evidenciou-se, portanto, que os temas abordados despertaram um grande interesse por parte do público participante, sobretudo pela possibilidade de concretizar a soberania alimentar no cotidiano das suas famílias, reconhecendo, ao mesmo tempo, a necessidade de transformar as relações sociais, em relação às mulheres, por exemplo, e também com a natureza, fomentando, assim, a agroecologia.
Effects of Various Forms of Unstable Load on Muscle Electromyography in the Stabilizing Musculature and Rating of Perceived Exertion in the Bench Press
Authors: Costello Kyle
Published: May 2020

Costello, K. Effects of various forms of unstable load on muscle electromyography in the stabilizing musculature and rating of perceived exertion in the bench press. J Strength Cond Res 36(4): 881–887, 2022—The purpose of the study was to determine whether unstable load training and the Swiss bar in the bench press can cause greater rating of perceived exertion (RPE) values and greater muscle activation in the stabilizing musculature and the same or greater in the primary movers with a decreased load. Division III college athletes (N = 24) performed 4 bench press interventions: stable bench press standard bar (SBp; 75% 1 repetition maximum), stable bench press Swiss bar (SwB; 65%), unstable bench press standard bar (UBp; 60%), and unstable bench press Bandbell bar (Bb; 60%). One-way repeated-measures analysis of variance was used to compare the average muscle activity values of pectoralis major (PM), triceps brachii (TB), anterior deltoid (AD), and biceps brachii (BB) and RPE values of each intervention. In the PM, mean muscle activity values were significantly (ps < 0.01) greater in the stable SwB and unstable Bb bar than the SBp. In the TB, mean muscle activity values were significantly (p < 0.001) greater in the stable SwB intervention than the SBp and UBp. Mean muscle activity values were significantly (p = 0.032) greater in the unstable Bb bar than the SBp intervention. In the AD, mean muscle activity values were significantly (p < 0.001) greater in the SBp than the stable SwB and significantly (p < 0.001) greater in the UBp and unstable Bb bar than the stable SwB. In the BB, mean muscle activity values were significantly (p < 0.001) greater in the UBp and unstable Bb than the SBp and significantly (p < 0.001) greater in the UBp and unstable Bb bar than the standard SwB. Mean muscle activity values were significantly (p < 0.001) greater in the unstable Bb bar than the UBp. The unstable Bb bar was perceived the most difficult when compared with other bars (ps < 0.01). The unstable interventions were viable options to replace the standard bench press as a method of upper-body resistance training.
Short-Term Blood Flow Restriction Increases Power Output and Bar Velocity During the Bench Press
Authors: Wilk Michal , Krzysztofik Michal , Filip Aleksandra , Zajac Adam , Bogdanis Gregory C. , Lockie Robert G.
Published: May 2020

Wilk, M, Krzysztofik, M, Filip, A, Zajac, A, Bogdanis, GC, and Lockie, RG. Short-term blood flow restriction increases power output and bar velocity during the bench press. J Strength Cond Res 36(8): 2082–2088, 2022—This study examined the effect of blood flow restriction (BFR) with 2 different types of cuffs on peak power output (PP), mean power output (MP), peak bar velocity (PV), and mean bar velocity (MV) in the bench press exercise (BP). Fourteen healthy strength-trained male athletes (age = 27.6 ± 3.5 years; body mass = 84.1 ± 8.0 kg; height = 175.8 ± 6.7 cm; BP 1 repetition maximum [RM] = 138.6 ± 17.8 kg) performed 3 different testing protocols as follows: without BFR (NO-BFR), BFR with a narrow cuff (BFRNARROW), and BFR with a wide cuff (BFRWIDE) in a randomized crossover design. During all sessions, subjects performed one set of 3 repetitions of the BP exercise using 70% 1RM. Cuff pressure was set to approximately 90% full arterial occlusion pressure of the upper limb at rest. Analyses of variance showed an increase in PP (by 21%, p < 0.01; effect size [ES] = 1.67), MP (by 16%, p < 0.01; ES = 0.93), PV (by 22%, p < 0.01; ES = 1.79), and MV (by 21%, p < 0.01; ES = 1.36) during BFRWIDE compared with NO-BFR and a significant increase in PP (by 15%, p < 0.01; ES = 1.07), MP (by 17%, p < 0.01; ES = 0.78), PV (by 18%, p < 0.01; ES = 1.65), and MV (by 13% p < 0.01; ES = 1.00) during BFRWIDE compared with BFRNARROW. There were no significant differences in any of the variable between NO-BFR and BFRNARROW. The results of the study indicate that short-term BFR training increases power output and bar velocity during the BP exercise. However, only BFRWIDE significantly influenced bar velocity and power output, which indicates that the width of the cuff is a critical factor determining acute exercise adaptation during BFR resistance training.
Implementasi Program Powerpoint Ispring dalam Meningkatkan Pemahaman Konsep Gerak Lurus dan Motivasi Belajar Siswa di SMP Negeri 2 Tarongong Kidul Garut
Authors: Irwanto Irwanto , Nurmalatika Tika
Published: May 2020

Berdasarkan hasil pengamatan, baik hasil belajar siswa maupun motivasi belajar dalam pelajaran fisika belum optimal. Masih banyak siswa yang belajarnya belum memenuhi pencapaian nilai KKM. Adapun tujuan dari penelitian ini adalah untuk mengetahui penggunaan Program PowerPointISpring terhadap peningkatan pemahaman konsep gerak lurus dan motivasi belajar siswa di kelas VII SMPN 2 Tarogong Kidul Garut.Metode penelitian yang digunakan adalah metode penelitian eksperimen menggunakan bentuk desain eksperimen type  Quasi eksperimental design dengan bentuk nonequivalent control group designâ€. Populasi dalam  penelitian  ini adalah seluruh  kelas VII siswa SMPN 2 Tarogong Kidul Garut sebanyak 9 kelas. Pengambilan sampel dilakukan dengan cara acak kelas yaitu kelas VIIG sebanyak 36 orang sebagai kelas eksperimen, dan kelas VIIK sebanyak 33 orang sebagai kelas kontrol. Teknik pengumpulan data diambil dari instrument tes dan angket serta teknik analisis data menggunakan rumus gain ternormalisasi, uji normalitas sebaran data, dan uji perbedaan dua  rata-rata.Setelah dilakukan penelitian, diperoleh kesimpulan sebagai berikut:(1) Peningkatan pemahaman konsep gerak lurus pada siswa yang pembelajarannya menggunakan program PowerpointIspring termasuk dalam kategori sedang dan tinggi.Sementara pada siswa yang  pembelajarannyatidak menggunakan program PowerpointIspringtidak mengalami peningkatan  signifikan, yaitu kategori rendah dan sedang (2) Peningkatan motivasi belajar pada siswa yang pembelajarannya menggunakan program PowerpointIspringtermasuk dalam kategori sedang dan tinggi.Sedangkan peningkatan motivasi belajar padasiswayang pembelajarannyatidak menggunakan program PowerpointIspring tergolong kategori rendah dan sedang (3) Terdapat perbedaan peningkatan pemahaman konsep gerak lurus dan motivasi belajar siswa, dalam hal ini peningkatan pemahaman konsep gerak lurus dan motivasi belajar siswa pada kelas eksperimen lebih baik daripadakelas kontrol.
Analisis Forensik Metarouter pada Lalu Lintas Jaringan Klien
Authors: Firmansyah Firmansyah , Fadlil Abdul , Umar Rusydi
Published: May 2020

Seorang pengusaha atau penyedia jasa di dunia jaringan internet, tentu akan menemukan klien dengan karakter yang berbeda. Klien yang tidak buta teknologi yang khususnya router, terkadang menginginkan akses penuh ke router, atau beberapa dari klien yang meminta untuk menambahkan router untuk dapat secara langsung mengakses router secara penuh. Sebagai pengusaha layanan internet bisa saja memberikan router tambahan, namun tentu akan menambah biaya sesuai harga router. Beberapa kasus lain, misalnya sesorang klien akan membuat sebuah laboratorium jaringan komputer, maka akan sangat membutuhkan router yang banyak. Router, saat ini semakin canggih, dengan adanya metarouter, akan dapat menghemat biaya yang keluar. Metarouter memungkin klien untuk mengolah jaringan sendiri, seolah-olah klien memiliki router.  Kasus yang terjadi mebuktikan bahwa router sangatlah penting untuk membagi atau mendistribusikan IP address, baik secara statik maupun dinamik. Forensik jaringan berfungsi untuk merekam kejadian atau aktifitas lalu lintas data pada jaringan komputer, dengan melakukan analisa dari hasil investigasi yang didapat, sehingga menemukan sebuah bukti aliran paket yang mencurigakan. Log aktifitas jaringan dapat menyimpan beberapa informasi yang sangat penting dalam mengungkap terjadinya ancaman atau serangan terhadap jaringan komputer. Lalu lintas jaringan dapat mengungkapkan tindakan kriminal dengan cara melihat kembali log. Aplikasi Wireshark dapat melihat paket data yang sedang berjalan secara langsung.
Entrenamiento de la flexibilidad en voleibol sentado
Authors: Cantillo Bello Gil Andersson , Camargo Rojas Diana Alexandra
Published: May 2020

La presente investigación es un estudio cuasi experimental que muestra los efectos de un programa de entrenamiento de la flexibilidad de la cadena muscular posterior sobre el alcance funcional y la ejecución del golpe de antebrazos en un grupo de jugadores de voleibol sentado de la liga de Bogotá.  Dicho programa se fundamentó en la combinación de dos técnicas de desarrollo de la flexibilidad, facilitación neuromuscular propioceptiva (FNP) y estiramiento dinámico. Se llevó a cabo durante seis semanas, para un total de 17 sesiones, cada una de 30 minutos de duración y dos sesiones para aplicar el pre test y post test. El estudio muestra significación estadística en los resultados de los test de flexibilidad, sin embargo, no se obtiene significación en los resultados del test de alcance funcional ni en la evaluación del golpe de antebrazos, aunque si se observan cambios a nivel clínico.  Además de esto se encuentra una correlación de significación estadística entre el test de sit and reach y el ángulo de inclinación del tronco, medido a través de análisis de gesto por medio del software kinovea.
Adolescentes migrantes nicaragüenses en el sistema educativo costarricense: reflexiones desde y para la orientación
Authors: Artavia Aguilar Cindy
Published: May 2020

Este artículo surge de un proceso de investigación sobre el examen de la realidad educativa de ser migrante desde las experiencias socioeducativas de adolescentes migrantes nicaragüenses, con la finalidad de abrir espacios de reflexión y análisis, partiendo de la disciplina de orientación y su ámbito de acción en el sistema educativo. El estudio se realizó con diez personas adolescentes migrantes nicaragüenses en el sistema educativo costarricense. Los resultados de dicha investigación se socializaron y discutieron con estudiantes de la carrera de Orientación de la Universidad Nacional, con el propósito de establecer un espacio reflexivo a la luz de las posibles áreas de intervención desde la disciplina. Tales resultados giran en torno a tres categorías de análisis: la percepción de las repercusiones emocionales de ser estudiante migrante; toma de decisión y consecuencias de la migración, y, por último, los retos educativos de las personas migrantes. A partir de ellas, se establecen ideas conclusivas en permanente meditación, como la importancia reflexiva de los procesos de orientación, en torno a la diversidad y la interculturalidad desde la dignidad de la persona, y la potencialización tanto de habilidades como de destrezas para el desarrollo humano.
La importancia de la otredad en la enseñanza de la religión en las escuelas: el gran desafío para el docente
Authors: Figueroa Héctor Alfredo
Published: May 2020

Basta mirar alrededor nuestro para descubrir que lo que sucede en las aulas es el mero reflejo de esa sociedad que las circunda. Las relaciones interpersonales, muchas veces dañadas por distintas circunstancias, se diluyen con el devenir de los días, terminando en una ignorancia total hacia los otros o en agresiones cuyo límite no se pueden prevenir. Parece que la asignatura de religión no puede penetrar esas corazas de individualismo y relativismo; por consiguiente, no está dando frutos como pacificadora y generadora de encuentro. Será hora de interpelar nuestras acciones como agentes sociales y educadores, con el afán de lograr una honesta transformación para bien de todos. Pensando en poder asumir nuestro compromiso, se propone, primeramente, reconocernos a nosotros mismos tal cual somos, para luego reconocer al otro y, de esa manera, actuar como verdaderos hacedores de puentes que fomenten el diálogo conducente a la paz.
Data mining systems for teaching
Authors: Kurasova Olga
Published: May 2020

Data mining systems suitable for data mining teaching have been investigated in the paper. Ussualy, such systems as SPSS Modeler (Clementine), Statistica, SAS/STAT are used in the mathematical statistics courses. However, they are not always suitable for data mining teaching. WEKA, Orange, KNIME, RapidMiner systems are more appropriate for this purpose.
Computational modelling of the biosensor acting under parallel substrates conversion with dialysis membrane
Authors: Ašeris Vytautas
Published: May 2020

A mathematical model of biosensor acting under parallel substrates conversion is investigated in this paper. Model consists of reaction-diffusion equations with non-linear terms, which in general case are solved numericaly. The mathematical model describes biosensor action in one-dimensional space, which consists of enzymatic, dialysis and diffusion layers. The purpose of this work was to define for which parameter values the layers of diffusion and dialysis membrane can be replaced by one external layer, described by the effective diffusion coefficient. The simulation error of two-layered model response was investigated by comparing it to the values of three-layered model response.
Construction of the classifying test items with quantitative diagnostic indicators
Authors: Gudelytė Laura , Krylovas Aleksandras , Laukevičius Tadas , Kosareva Natalja
Published: May 2020

Method which describes destribution af elements of the finite set to disjoint groups, allowing to obtain of elements in the sense of proposed criterion, is described in the paper. The methodology is based on some combinatorial algorithm and can be useful for social science problems solving, when statistical methods application complicated.
Short-term time series prediction based on sceleton algebraic sequences with internal smoothing
Authors: Palivonaitė Rita , Ragulskis Minvydas
Published: May 2020

An improved algebraic forecasting method with internal smoothing is proposed for short-term time series prediction. The concept of the H-rank is proposed for the detection of a base fragment of the sequence. Numerical experiments with artificially generated and real-world time series are used to illustrate the forecast method.
Mathematical modelling of respiration control system
Authors: Švitra Donatas , Vilkytė Ramunė
Published: May 2020

In this article the authors performed respiratory system mathematical model, described by two differential equations with one delay argument linear, nonlinear and numeric analyses. Linear analysis was performed D-segmentation method. A stable periodic solution application on bifurcation theory was constructing in the nonlinear analysis. In the numeric analysis using Runge–Kutta IV series method, numerical solutions have been constructing to the pathologic Cheyne–Stokes case.
Mečys Mačernis in the didactics of mathematics
Authors: Ažubalis Algirdas
Published: May 2020

Mečys Mačernis (1897–1968) taught elementary Mathematics and Didactics at the Republican Pedagogical Institute of Klaipėda during the years 1935–1939. He studied at universities of Berlin and Königsberg, during the period of time from 1926 to 1934 he worked as a head master of teachers’ seminary in Tauragė. In 1935–1935 M. Mačernis worked as a vice-director of the Republican Pedagogical Institute of Klaipėda and since 1937 he worked there in the position of a director. Even in 1926 for students of the Teachers’ seminary, he published a methodical textbook of teaching Arithmetics. During 1925–1928 he published 3 articles about mathematics didactics. During his activity in Klaipėda, M. Mačernis prepared and in 1940 published for students of the institute a methodical textbook of teaching Arithmetics and Geometry. In 1938–1939 he completed a work about pedagogy of the Middle Ages and a large, three volume work titled ‘Didactics’. Together withthe Institute, M.Mačernis left Klaipėda that was separated from Lithuania by Hitler and went to Panevėžys, and later to Vilnius that was returned back to Lithuania. When Lithuania was occupied by the Bolsheviks, M. Mačernis was dismissed from the director position. In 1941 he was arrested and deported to far inland Russia. After the World War II he worked as a teacher of Mathematics in the Karaganda region. When M. Mačernis returned to Lithuania after deportation, he worked as a teacher of Mathematics at school in Plungė. After the year 1940 M. Mačernis did not write any scientific pedagogical work. Methodical textbooks of teaching Mathematics written by M. Mačernis presented the teachers of Lithuania actual ideas of connections established between teaching and practice, internal and inter-subjective integration that were widely discussed in Western Europe of that time.
Survey of LEU olympiad 2012 for young mathematicians
Authors: Jakaitytė Eglė , Kaučikas Algirdas , Mazėtis Edmundas
Published: May 2020

The texts and solutions of the LEU young mathematicians olympiad – 2012 are presented.
Uncertainty influence on AHP method ratings
Authors: Vinogradova Irina
Published: May 2020

The paper deals with the evaluation of the criteria impacting distance learning course content quality. The goal of the paper is to introduce the improved AHP method with Fuzzy triangle numbers used to determine the quality of distance learning courses. In the paper, the interval and discrete methods for weights determination are compared.
Manifestation tendencies of deep and surface learning of mathematics at KTU
Authors: Novikienė Regina , Matiukaitė Rasa
Published: May 2020

Researchers [5] state that a gifted child is the one who early understood how to learn and applies analysis-based learning style. Therefore, the faculty to learn might be treated as the key factor of student’s success. The article seeks to examine how widely the strategy of deep learning is spread among the students of Kaunas University of Technology (KTU) and what external and internal factors impede the learning.
Research of comparative analysis of nonparametric density estimation by applying Monte Carlo method
Authors: Drulytė Indrė , Ruzgas Tomas
Published: May 2020

This paper presents nonparametric statistical estimation of distribution density. The Monte Carlo  method is used to show the effects of kernel function for multimodal kernel density estimation. Here it is shown that the novel kernel function is effective for asymmetrical heavy tails distributions.
IVth grade pupils’ mathematics learning outcomes influencing factors
Authors: Gesevičienė Vilma , Mazėtis Edmundas
Published: May 2020

The article deals the interface between the IVth grade pupil’s achievement in mathematics and elementary school teachers’ professional competence.
A rational sine and cosine of the angles of a triangle
Authors: Mazėtis Edmundas , Melničenko Grigorijus
Published: May 2020

The article deals with triangles whose sines and cosines of the angles are the rational numbers. We prove that these triangles are similar to Pythagorean or Heronian triangles, and vice versa.
Primary school pupils cognitive abilities in informatics
Authors: Dagienė Valentina , Feiferytė Simona , Sutkutė Elena
Published: May 2020

In Europe intensively are searching for opportunities to promote informatics as a fundamental subject teaching of elementary schools, beginning from primary classes. Looking for ways how to do it. Informatics and information technology contest’s “Beaver” scientific community has started to arrange tasks for primary school’s pupils. In Lithuania already for two years contest had attracted many of the 3rd and 4th grade pupils. Contest’s tasks and pupils’ solutions have been taken to analyse, in order to improve infants’ Informatics cognitive abilities. This article discusses the results of an expert evaluation of informatics tasks for primary school pupils and analyses the results of participants.
Criteria weights balancing using Kemeny median
Authors: Krylovas Aleksandras , Kosareva Natalja
Published: May 2020

The proposed in the article weights balancing approach enables to solve multiple criteria decision making tasks for the cases when objects are estimated by the two or more groups of the criteria which are not quantitatively compatible with each other. Criteria weights are being balanced by solving conditional optimization problems. The conditions for the certain optimization problem are determined by the construction of Kemeny median.
User segmentation in online advertising using latent Dirichlet allocation
Authors: Aliulis Darius , Janilionis Vytautas
Published: May 2020

User segmentation is one the most important problems in online advertiting. The use of online latent Dirichlet allocation model for analysing big datasets for this purpose is proposed in this paper. The relationship between the number of segments and segmentation quality metrics is analized and criteria for assigning ads to user segments are proposed.
Analysis of asymptotic for a model of nonlinear oscillations of the two string
Authors: Lavcel-Budko Olga , Krylovas Aleksandras
Published: May 2020

The mathematical model of two strings nonlinear oscillations is presented. To find uniformly valid in a long time interval asymptotic solution of the problem an averaging scheme is constructed.
Algebraic time series forecasting and segmentation models
Authors: Lukoševičiūtė Kristina , Palivonaitė Rita
Published: May 2020

An algebraic segmentation method based on algebraic predictor with internal smoothing is proposed. The concept of the rank of the sequence is proposed for the detection of a base fragment of the sequence. Numerical experiments with a real-world financial time series illustrate the segmentation method.
Bayesian approach for criteria weights recalculation
Authors: Vinogradova Irina
Published: May 2020

Multiple Criteria Decision Making (MCDM) methods are effectively used in decision making tasks. The weights of criteria are an integral part of MCDM methods. The paper proposes the Bayesian approach to recalculate the weights of the criteria, when the decision-maker takes into account the opinions of other expert groups. Recalculation is relevant when the selection is individualized by the opinion of separate expert group. In this paper the distance learning course was chosen by separate group of experts, using SAW and TOPSIS methods and recounted criteria weights by Bayesian method.
Is it possible with two words to touch three subjects?
Authors: Kašuba Romualdas , Rudalevičienė Regina
Published: May 2020

In the paper an attempt to describe what a unexpected consequencies a comparison of some two (even strickingly similiar) matters might imply.
On the insolubility of one drawing problem
Authors: Kirjackis Jevgenijus , Mazėtis Edmundas , Melničenko Grigorijus
Published: May 2020

It is shown in the article that, in general, it is not possible to draw a triangle using a compass and a straightedge given an angle, and a bisector and a median drawn from the vertex of another angle. It is shown in which particular cases a triangle can be drawn.
Semiotic analysis of portrait drawing problem
Authors: Kudžma Ričardas , Rukaitė Vitalija
Published: May 2020

In this article full semiotic analysis of portrait drawing problem is presented. Two texts are being considered, one from the book of H.B. Griffiths and A.J. Oldknow and other from Vilnius University students control test. Main result is the semiotic square of the text.
Virtual, augmented, and mixed reality-based learning systems: personalisation framework
Authors: Dvareckienė Viktorija , Kurilovas Eugenijus , Jevsikova Tatjana
Published: May 2020

The paper is aimed to analyse the problem of personalisation of Virtual Reality/Augmented Reality/Mixed Reality (VR/AR/MR) based learning systems. Research results are two-fold: first, the results of systematic literature review are presented, and, second, VR/AR/MR-based learning systems personalisation framework is proposed. First of all, systematic literature review on research topic was conducted in Thomson Reuters Web of Science database and applying Semantic Scholarsearch tool. The review revealed that strides are being made in education using VR/AR/MR, although much needs to be done. The possibilities of VR/AR/MR application in education seem to be endless and bring many advantages to students of all ages. Few are creating content that may be used for educational purposes, with most advances being made in the entertainment industry, but many understand and realise the future and importance of education applying VR/AR/MR. Manystudies argue that new VR/AR/MR-based learning systems are more effective in comparison with traditional ones. Teachers and students like learning content and activities provided by VR/AR/MR technologies. On the other hand, although the concept of VR/AR/MR has already been proposed more than 20 years ago, most applications are still limited to simple visualisation of virtual objects onto spatially limited scenes, and the developed systems did not pass the barrier of  demonstration prototypes. Many authors agree that personalisation of VR/AR/MR-based learning platforms should be further analysed. Original personalisation framework of VR/AR/MR-based learning systems is also presented in the paper. According to the framework, personalisation of VR/AR/MR learning systems should be based on applying learners models and intelligent technologies e.g. expert evaluation, ontologies, recommender systems, software agents etc. This pedagogically sound personalisation framework is aimed to improve learning quality and effectiveness.
Analysis of adequacy of autoregressive model for Lithuanian vowels
Authors: Kaukėnas Jonas , Tamulevičius Gintautas
Published: May 2020

Autoregressive (AR) model is widely used for modeling of speech signals. Nevertheless, the problem of adequate modelling of Lithuanian speech is still open. The results of this study indicate the need of much higher order models for Lithuanian wovel description. Only high order AR models enable us to model frequential properties of Lithuanian vowels adequately.
Asymptotic investigation of a nonlinear model of string vibrations
Authors: Lavcel-Budko Olga , Krylovas Aleksandras , Miškinis Paulius
Published: May 2020

The mathematical model of nonlinear oscillations of a weightless string is analysed. The uniformly valid asymptotic approximation in the long time interval, which is inversely proportional to the small parameter, is constructed. This asymptotic approximation is a solution of averaged along characteristics integro-differential system. A method for constructing special approximations of its solutions is proposed.
Kernel-type estimator for the extreme value index of air temperature
Authors: Jokimaitis Arvydas , Petronaitis Darius
Published: May 2020

The article authors obtained of kernel-type estimator for the extreme value index of maximum air temperature.
Hijab Pin Ingestions
Authors: Yogev Dotan , Mahameed Fadi , Gileles-Hillel Alex , Millman Peri , Davidovics Zev , Hashavya Saar , Rekhtman David , Wilschanski Michael , Berkun Yackov , Slae Mordechai
Published: May 2020

OBJECTIVES:

To characterize the clinical manifestations, outcomes, and complications of hijab pin ingestion in adolescents and to identify risk factors for a need for intervention.

METHODS:

A retrospective review of patients <25 years of age who presented to our emergency department because of hijab pin ingestion between 2007 and 2018. Comparison was performed between impaled and nonimpaled pins.

RESULTS:

We reviewed 1558 foreign-body ingestion cases. Of these, 208 (13.3%) patients presented because of hijab pin ingestion, with a total of 225 ingested pins. The mean patient age was 14.7 ± 4.1 years, and 88% of patients were girls. Time from ingestion to presentation was 24 ± 49.5 hours. Most pins were located in the stomach (46.6%), and 18.6% of all pins were impaled. Location in the stomach (odds ratio = 4.3 [95% confidence interval: 1.9–9.2]; P < .001) and abdominal tenderness on examination (odds ratio = 2.7 [95% confidence interval: 1.3–5.6]; P = .007) were strong independent risk factors for an impaled pin. Time to intervention was 22.9 hours, and 41 endoscopies were performed. One patient required laparoscopic surgery. No complications were observed.

CONCLUSIONS:

The hijab pin is an increasingly encountered foreign body in pediatric practice. Its specific clinical features distinguish it from other sharp objects. A delayed interventional approach in selected patients does not carry a higher risk of complications and results in significantly fewer interventions compared to existing guidelines. These findings will help guide pediatric specialists in this prevalent clinical scenario. Management recommendations are proposed.
Antimicrobial resistance among canine enteric Escherichia coli isolates and prevalence of attaching–effacing and extraintestinal pathogenic virulence factors in Spain
Authors: Sevilla Eloisa , Mainar-Jaime Raúl C. , Moreno Bernardino , Martín-Burriel Inmaculada , Morales Mariano , Andrés-Lasheras Sara , Chirino-Trejo Manuel , Badiola Juan J. , Bolea Rosa
Published: May 2020

The aim of this study was to estimate the prevalence of antimicrobial resistance (AMR) in Escherichia coli from a dog population in Spain and assess specific virulence factors. Susceptibility to 22 antimicrobials was tested along with the production of extended-spectrum β-lactamases (ESBLs) and AmpC in faecal isolates from 100 dogs. Virulence-related genes associated with attaching and effacing E. coli (eae, Stx1, Stx2) and extraintestinal pathogenic E. coli – ExPEC – (papC, hlyA and cnf1) were detected by PCR. At least one kind of AMR was observed in 73% of the isolates. The highest prevalences corresponded to penicillin (45%), aminoglycoside (40%) and non-extended spectrum cephalosporin (39%) classes. Multidrug resistance (MDR) was observed in 53.4% of the resistant isolates. No resistance to colistin was found. Production of ESBL/AmpC enzymes was detected in 5% of E. coli. Shiga toxin-producing E. coli were not observed, enteropathogenic E. coli were identified in only 12% of them, and ExPEC were found in 25%. Dog faeces can be a source of E. coli strains potentially presenting a threat to humans through their virulence factors or AMR. The non-hygienic keeping of animals may increase the risk of colonisation of such pathogens in humans.