bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigación y producción de conocimiento en educación matemática: una cuestión de mercado, poder y estética
Authors: Montecino Alex
Published: December 2021

Este artículo pretende abrir una discusión sobre las condiciones que hacen posible ciertos entendimientos sobre qué es la investigación y la (re)producción de conocimiento dentro del área. A partir de una problematización de las redes discursivas en la que circulan formas de ser y actuar deseados se desempaca formas de conducir las prácticas investigativas y el devenir del investigador. Investigando la investigación, como estrategia analítica, este artículo busca desplazar el foco de atención más allá de una mirada positivista o neopositivista de la producción del conocimiento, con ello posicionar la mirada en la lógica de mercado y su dinámica, el poder, el autor y la estética. Ergo, se muestra que las normas que delinean la investigación y la producción de conocimiento no tienen autoridad por sí mismas, más bien estas se configuran como parte de redes de poder. Por otra parte, se acentúa el hecho que la investigación debe abrirnos posibilidades de acción y reacción, ya sea estas incomodas o gratas.
Conocimiento emocional, complejidad vivencial y resiliencia matemática. Tres facetas para el afecto en Educación Matemática
Authors: Martínez-Padrón Oswaldo J. , Ávila-Contreras Jorge Iván , García González María S.
Published: December 2021

Este artículo reporta reflexiones emanadas de tres conferencias vinculadas al Dominio Afectivo en Educación Matemática, efectuadas en el seminario de Formación de Investigadores en Temas Contemporáneos de la Educación Matemática (FITCEM), organizado por la Asociación Aprender en Red. En primer lugar, se sintetizan aspectos relacionados con el Dominio Afectivo desde la postura de McLeod, perspectiva cognitiva bastante utilizada en Educación Matemática. Posteriormente se centra la atención en las emociones, uno de los tres descriptores básicos del modelo de McLeod. El abordaje hacia las emociones se realiza a partir de dos posturas, la noción de conocimiento emocional y la noción de complejidad vivencial: la primera centrada en lo cognitivo y la segunda desde un punto de vista principalmente configurativo y vivencial, más que cognitivo. Finalmente, se atiende a la resiliencia matemática y a su consideración como un componente pertinente para el estudio del afecto en Educación Matemática, dada las características de esta disciplina y el imaginario colectivo racionalista que muchas veces existe en la sociedad cuando se piensa en la actividad matemática.
Teoría histórico-cultural y educación matemática: diálogos posibles en la formación de profesores
Authors: Souza Flavia Dias de , Moretti Vanessa Dias
Published: December 2021

El presente artículo tiene como objetivo presentar aspectos básicos de la Teoría Histórico-Cultural y las posibles aportaciones de este referente para la investigación en Educación y, en particular, para la investigación en Educación Matemática, en lo que respecta a la formación del profesor que enseña Matemáticas. Para ello, se toma como punto de partida una breve presentación de algunos principios de esta rama teórica, seguida de un relevamiento de grupos de investigación en Brasil que se encuentran en el borde entre la Educación Matemática y la Teoría Histórico-Cultural, con énfasis en la constitución de un conjunto de grupos de investigación que integran la Red GEPAPe, de la cual las autoras forman parte. Finalmente, se abordan algunos ejemplos de investigaciones académicas que apuntan a esta posibilidad de diálogo, tratando de revelar cómo la referencia adoptada subsidia para promover formas de organizar la enseñanza para el aprendizaje de la enseñanza. En el conjunto de investigaciones discutidas en el artículo se busca explicar las posibles relaciones entre el concepto de actividad docente, el cambio de significado personal y el desarrollo del pensamiento teórico en la formación del profesor que enseña Matemáticas, así como se discute cómo el método histórico-dialéctico se ha presentado en.
Características socio-económicas de las familias de mujeres víctimas de violencia de género con hijos/hijas testigos, que asisten al servicio comunitario Casa de la Mujer Bañado Tacumbú, 2020
Authors: Carosini Miranda Analía Roxana , Morales Ruiz Lilian Paola
Published: December 2021

Es un estudio exploratorio de enfoque cualitativo que permite comprender los relatos de experiencias de las mujeres, desde una mirada con enfoque de género y derechos humanos. Se desarrolló un análisis crítico en torno a dimensiones como ser: estructura y relacionamiento familiar, condiciones económicas, educativas, de salud y finalmente las expresiones de violencia de género. Entre los principales hallazgos, el estudio muestra que las mujeres entrevistadas provienen de familias nucleares, durante su niñez y adolescencia todas han sido testigos de violencia de género ya que ésta era ejercida por parte de sus padres hacia sus madres. Han sido trabajadoras adolescentes, priorizaron el sustento económico diario y en esta etapa abandonaron o fueron privadas de la formación académica; acceden a servicio de salud públicos. Tuvieron como primer cónyuge al padre de sus hijos e hijas, que pasado el tiempo a su vez se convirtieron en sus principales agresores. Las mujeres se encontraron dentro del círculo de violencia por más de diez (10) años, durante todo este tiempo sus hijos e hijas fueron testigos de tal realidad. La Casa de la Mujer, servicio comunitario, ha sido clave en la transformación cultural de estas mujeres al momento de romper el círculo de violencia y denunciaron tal situación, fueron acompañadas psicológica y legalmente sintiéndose como sujetos de derecho y reconociendo la posibilidad de una vida libre de violencia.
Que la pandemia no nos robe la humanidad. Paraguayos y paraguayas residentes en el extranjero y su derecho a regresar a su país
Authors: Cristaldo Patricia , Ruffinelli Rosa , García Belinda , Lo Bianco Álvaro
Published: December 2021

En este artículo académico, se presenta la situación de los paraguayos residentes en el exterior y la violencia estructural ejercida por el Estado hacia los compatriotas, que al igual que todos los ciudadanos, han sido gravemente afectados por la pandemia y en especial este grupo en particular, que se encuentran lejos de sus familias, de sus raíces, del lugar donde en medio de la adversidad, sienten que deben volver. Se realizó un relevamiento bibliográfico sobre la legislación vigente a nivel nacional e internacional que garantizan los derechos de todos ciudadano paraguayo aun si se encontrara residiendo en el extranjero, describiremos las medidas sanitarias tomadas por el gobierno para mitigar el avance de la pandemia en nuestro país y el impacto de las mismas en la vida de los connacionales residentes en el extranjero, las restricciones impuestas y la legalidad de las mismas, principalmente ante las innumerables denuncias de uso indebido de las fuerza por parte de policías y militares hacia la población en general y la respuesta brindadas por el Estado Paraguayo a los conciudadanos migrantes, principalmente en cuanto a albergues y hoteles albergues.
Ser docente en tiempos de pandemia: reflexiones para pensar el ejercicio docente en Paraguay
Authors: Bareiro Laura
Published: December 2021

El cierre de las escuelas, con la suspensión de las actividades académicas presenciales como medida de aislamiento social para evitar la propagación del coronavirus, trajo consigo nuevas exigencias y cambios para las y los docentes. Este trabajo aborda algunas reflexiones al respecto, que han sido elaboradas a partir de la revisión de artículos, noticias periodísticas, videoconferencias y publicaciones relacionadas a la tarea de las y los docentes en este contexto de aislamiento social originada por el COVID-19. Se rescatan las deficiencias ya existentes en su formación inicial, las que requiere la implementación de una educación virtual, los recursos que se necesitan, los tiempos que se requieren para la implementación de lo planificado, la desaparición de los límites en la jornada laboral, las múltiples tareas de las docentes con la escuela en su casa, sumado a las tareas de cuidado. Estas exigencias y cambios señalados son apenas una aproximación a esta problemática, no obstante, permite visualizar las dificultades que se presentan a las y los docentes. Es necesario pensar en mejorar las condiciones en las que sitúan estas prácticas docentes y que les impiden responder a las demandas de altos niveles de calidad y propuestas creativas.
Analisis pengaruh pendidikan dan pelatihan teknis serta motivasi terhadap kinerja alumni balai pendidikan dan pelatihan industri regional i di medan
Authors: Ronald Tambunan James
Published: December 2021

Balai Diklat Industri Regional – I Medan us one of technical executive unitaries in education and training sector is responsible for center for Industrial Education and Training of the Ministry of Industry. Since Regulation number 22 year 1999 for local autonomy is legalized and then has been changed to regulation number 32 year 2003, there are many changes in the structure of organization including reposition and substitution of functionaries and officials in industrial service institution. Due to the reposition, there are many officials still do not have enough technical substantive knowledge about industry sector as their aquip to do their dutter. In order to repair this condition, technical training needs to be done. It aims to synchronize perception between the older and the newer ones. The purpose of this research is to look for and analyze the effect of Technical Training and motivation of alumnae’s work in Balai Diklat Industri Regional I Medan. Hypothesis of the research is Technical Training and motivation affect alumnae’s work in Balai Diklat Industri Regional I Medan. Method use in taking the samples is by using Slovin Formulation in which from 179 populations about 124 samples are taken. Hypothesis is tested by using compound linear regressive analysis. It is held by doing simultaneous test (f test) and partial Test (t test). Both of tests have purpose to know the effect of independent variable to dependent variable on relieance level 95% or ? = 0,005. The result of analysis shows that Technical Training and motivation have simultaneous and significant effect to work motivation of alumnae in Balai Diklat Industri Regional I Medan. The significant level is 0.000. Determinant Coefficient (R2) of independent variable to dependent variable is about 59,3 % and the rest (40,7 %) is affected by another variable that is not used in this research. The result of t test (partial test) shows every independent variable used has significant effect to its dependent variable. Technical Training variable has real effect to the work with significant effect to the work 0.01 with significant level 0,000 smaller than 0,005 (5%).
MODEL INTERAKSI NARAPIDANA KELAS II A PALANGKA RAYA
Authors: Lestariono Wijoko , Rahman Fauzi
Published: December 2021

Penelitian ini bertujuan untuk (1) mengetahui pola interaksi warga binaan Lapas Klas IIA Palangka Raya. (2) Ingin mengetahui Faktor-faktor terjadinya  pola interaksi  warga binaan Lapas Klas IIA Palangka Raya

Metode penelitian kualitatif pada dasarnya merupakan cara ilmiah untuk mendapatkan data dengan tujuan dan kegunaan tertentu. Berdasarkan hal tersebut terdapat empat kata kunci yang perlu diperhatikan yaitu: cara ilmiah, data, tujuan, dan kegunaan. Cara ilmiah berarti kegiatan penelitian itu didasarkan pada ciri-ciri keilmuan, yaitu rasional, empiris, dan sistematis. Rasional berarti kegiatan penelitian itu dilakukan dengan cara-cara yang masuk akal, sehingga terjangkau oleh penalaran manusia.

Hasil penelitian ini dapat disimpulkan : 1) Proses interaksi sosial antar warga binaan yang ada pada rutan kelas II A Palangka Raya  disebabkan karena adanya kontak sosial baik secara langsung maupun tidak langsung, dengan menggunakan symbol-simbol bahasa, dan tanda-tanda akibat dari interaksionis simbolik. Kesempatan kontak individu tercipta dalam suasana rutinitas sesuai dengan program pembinaan warga binaan yaitu bidang pertanian, pendidikan dan agama serta kesempatan meningkatkan keterampilan berupa pencucian kendaraan bermotor. 2) Pola interaksi asosiatif yang dilakukan oleh warga binaan Lembaga Pemasyarakatan Kelas II.A terjadi  pada : a) melalui kerjasama relative dapat terlaksana dengan baik dengan adanya saling pengertian dalam kebersihan ruang tahanan. b) Dalam interaksi asosiatif berupa Akomodasi, sudah ada mekanisme dalam menyelesaikan masalah yaitu dengan aturan dan sangsi, ketaatan terhadap aturan menghasilkan reward berupa remisi sedangkan pelanggaran terhadapnya .berupa pengasingan dalam straff sel dan tidak diberikan remisi. Umumnya konflik terjadi karena berkurangnya kepercayaan karena keterlambatan membayar hutang sehingga terjadi disharmoni antar warga binaan. c) Untuk interaksi Asosiatif  asimilasi , ditandai dengan  terjadinya penerimaan budaya mengenai bahasa yang digunakan bagi kelompok minoritas mengikuti kelompok mayoritas. d) Disisi lain nya perilaku laten dalam penggunaan alat komunikasi handphone untuk mengakses pesan dari luar dapat berdampak kepada terjadinya penyimpangan norma yang telah digariskan oleh pihak Lapas.
PERSEPSI MASYARAKAT TENTANG PARTISIPASI PEREMPUAN DALAM KEANGGOTAAN LEGISLATIF DI KECAMATAN PARENGGEAN
Authors: Karya Betty , Pandini Puspa
Published: December 2021

Penelitian ini bertujuan untuk mengetahui dan menjelaskan persepsi masyarakat tentang partisipasi perempuan dalam keanggotaan legislatif di lingkungan I Kelurahan di Kecamatan Parenggean. Penelitian ini menggunakan metode deskriptif dengan pendekatan kualitatif. Populasi dalam penelitian ini adalah masyarakat lingkungan I Kelurahan di Kecamatan Parenggean yang terdiri dari RT. 001. RT. 002, RT. 003 yang terdaftar sebagai pemilih tetap. Instrumen pengumpulan data menggunakan wawancara, observasi dan dokumentasi

Hasil Penelitian: a) Bahwa persepsi masyarakat terhadap caleg perempuan yang mencalon sebagai anggota legislatif yaitu masih ada keragu-raguan terhadap kemampuan menjadi wakil rakyat di DPRD nantinya, kurangnya sosialisasi dari caleg perempuan terhadap masyarakat sehingga menimbulkan persepsi masyarakat kurang menimbulkan pengaruh dan kurang dikenal oleh calon pemilih. b) Anggota legislatif perempuan di kabupaten serdang bedagai masih banyak menemui kendala disana sini. Salah satu penyebabnya yaitu: disebabkan masih kuatnya budaya patriarki atau anggota legislative laki-laki yang mendominasi dalam peran kepemimpinan politik yang telah melekat bagi setiap anggota legislatif sehingga sering kali ketika melakukan program kerja masih menemui kendala dan anggota legislatif perempuan itu merasa tersingkirkan. c) Faktor-faktor penghalang keterwakilan perempuan dilembaga legislatif, yaitu: Hambatan Kultural, Hambatan Sosial, Hambatan Ekonomi, Hambatan Politik
Nghiên cứu sự sụp đổ lũy tiến của khung bê tông cốt thép toàn khối chịu tải trọng nổ gần và đề xuất một số giải pháp kháng sập
Authors: Trung Phan Thành
Published: December 2021

Việc tính toán công trình chịu tác dụng của tải trọng nổ là yêu cầu bắt buộc với các công trình an ninh quốc phòng và công trình đặc biệt. Tuy nhiên, kết quả tính toán bài toán nổ còn rất phức tạp, có sai số lớn. Ở Việt Nam, phương pháp phổ biến hiện nay là phương pháp tải trọng tĩnh tương đương. Phương pháp đó cho kết quả phù hợp với một số trường hợp nhất định và không phản ánh được phản ứng động và quá trình quá hủy cấu kiện do tải trọng nổ gây ra. Bài báo tập trung vào sử dụng mô phỏng số để phân tích sự sụp đổ lũy tiến của khung bê tông cốt thép toàn khối khi chịu tác dụng nổ gần. Kết quả mô phỏng được so sánh với dữ liệu thực nghiệm và đạt được sự phù hợp. Từ đó, bài báo đề xuất một số giải pháp kháng sập lũy tiến cho công trình đặc biệt chịu tải trọng nổ gần.
Ứng dụng mạng lưới lò xo vào xử lý ổn định toàn khối nền đất yếu tại đồng bằng sông Cửu Long
Authors: Anh Nguyễn Thế
Published: December 2021

Nội dung bài báo này nhằm nghiên cứu hiệu quả của phương pháp gia cố nông nền đất yếu tại khu vực đồng bằng sông Cửu Long thông qua phương pháp mô phỏng số. Phương pháp trộn nông xi măng đất được đề xuất và hiệu quả của nó được đánh giá thông qua mô hình LSMnS; đây là mô hình mới được phát triển từ mô hình mạng lưới lò xo đàn hồi (LSM)  để có thể tính toán các tính chất cơ học của môi trường rỗng với một hay nhiều thành phần rắn khác nhau. Tính đúng đắn của LSMnS  được kiểm tra dựa trên sự so sánh với các công cụ và mô hình sẵn có, sai số lớn nhất luôn nhỏ hơn 1,6 %. Mô hình này được áp dụng để tính các mô đun đàn hồi hữu hiệu của một số mẫu đất với tỷ lệ xi măng trộn khác nhau nhằm đánh giá sự tăng cường tính chất của các mẫu trộn này. Kết quả cho thấy  mô đun cứng và cắt hữu hiệu tăng tới 47 % và 50 % khi hàm lượng xi măng ở mức 13 %.
Đô thị đại học –mô hình mới trong giáo dục đại học
Authors: Thúy Huỳnh Thị Hồng
Published: December 2021

Đô thị đại học là một mô hình phát triển cao của nền giáo dục tiên tiến tại một số quốc gia trên thế giới. Nó đảm nhận chức năng giáo dục đồng thời đáp ứng các nhu cầu cơ bản của cộng đồng. Các trường đại học hiện nay có xu hướng ngày càng mở rộng về quy mô, hoặc sáp nhập giữa các trường tạo thành những cụm đại học có diện tích tương đương một đô thị. Ở Việt Nam, mô hình đô thị đại học cũng bắt đầu hình thành như Làng đại học Thủ Đức, đô thị đại học Võ Trường Toản… Bằng cách khảo sát, so sánh một vài đô thị đại học trên thế giới như Đại học Harvard, Đại học Oxford, Đại học Tsukuba… hay các dự án đô thị đại học trong nước như Đại học quốc gia Hà Nội, Đại học Đà Nẵng, Đại học quốc gia thành phố Hồ Chí Minh... Bài viết trình bày về quá trình hình thành cũng như định hướng phát triển của một số các đô thị đại học hiện nay.
Word Stress in Qassimi Arabic: A Constraint-Based Analysis
Authors: Alabeeky Reem Mohammed
Published: December 2021

This study aimed to produce a formalism of word stress in Qassimi Arabic (QA), which is a sub-dialect of Najdi Arabic (NA), using a constraint-based approach. To this end, this paper investigated two main topics: The first topic explored word stress in QA. Word stress in QA, as well as in NA, is predictable; it can be determined by syllable weight and position. However, two cases do not conform to such straightforward stress rules. These cases are represented by the words: [ʔal.ʕa.sˤir] ‘afternoon’ and [ʔa.ʕa.rif] ‘I know’. Derivational analysis of these exceptions shows the importance of relating the surface structures of such forms to their underlying representations. The second topic aimed to make a formalism for stress patterns in QA using optimality theory (OT). Thus, QA word stress rules and their exceptions are translated into conflicting constraints that are ranked relative to one another by the use of constraint-relation tableaux. This ranking eventually produced the following constraint-relation hierarchy: Lx≈Pr, SYLLABLE-INTEGRITY, TROCHAIC, FAITH-PK >> NONFINAL >> *[ʔa. >> FTBIN-µ, WSP, ALL-FEET-RIGHT >> MAIN-RIGHT, PARSE-σ.
Enrichment of Fermented Sorghum Flour with Pumpkin Pulp and Seed for Production of A Vitamin A and Iron Enhanced Supplementary Food
Authors: Mbijiwe Jane , Ndung’u Zipporah , Kinyuru John
Published: December 2021

Vitamin A and iron deficiencies are prevalent in preschool children being a public health concern. The study aimed at developing a flour blend formulation made of sorghum, pumpkin pulp and seeds and examining its contribution to the daily nutrient requirement for iron and vitamin A among preschool children. Three flour blends were formulated using a mixture of fermented sorghum flour, pumpkin seed flour and pumpkin pulp flour with the following ratios 80:10:10 (FP1), 70:15:15 (FP2) and 60:20:20 (FP3), respectively whereas control was made of 100% fermented sorghum flour. The flour blends and the control were analyzed for moisture content, protein, crude fiber, crude fat, ash, carbohydrate, beta-carotene and iron content. Further, sensory tests were conducted using a nine-hedonic scale to evaluate consumers acceptability of porridge made of the flour samples. Microbial analysis was conducted to establish the safety of developed flours. The results show that as the proportion of pumpkin pulp and pumpkin seed flours increased the protein content, ash, vitamin A and iron content significantly (P<0.05) increased. The flour blend FP3 recorded the highest amount of protein (22.87%), vitamin A (875.00 µg RAE/100g) and iron (27.51 mg/100g). The FP2 flour blend was the most preferred with sensory score of 7.91 and had ability to meet >70% of daily protein, iron and vitamin A requirements of preschool children thus most suitable for a feeding trial. The findings of this study demonstrate that pumpkin pulp and pumpkin seed can be used to enhance the nutritive value of sorghum and as such meet the protein, iron and vitamin A requirements of preschool children aiding in the eradication of nutritional deficiencies.
El Marketing, el Greenwashing y su influencia en el Brand Equity. Caso de Estudio: Colombia
Authors: Gutiérrez Margarita Gutiérrez
Published: December 2021

Este artículo analiza la identidad visual, a través del último logosímbolo de la empresa colombiana Ecopetrol S.A., y establece el impacto sobre la percepción del consumidor, su aceptación y reconocimiento de sus actividades, haciendo énfasis en el «branding» y su influencia en la marca. La investigación de carácter cualitativo y cuantitativo, se apoya en los marcos conceptuales del marketing corporativo, el «greenwashing» y la persuasión engañosa. El estudio revela que desde los puntos de vista publicitario, comunicativo y económico, el logosímbolo fue un éxito, al igual que en términos de «branding» y valor de marca, y resultó persuasivo y convincente.
Diseño en la Universidad. (Premios Fin de Grado 2017-2019)
Authors: González Solas Javier
Published: December 2021

Desde el año 2016 existe en España un Premio nacional más de diseño. Promovido por el Col.legi Oficial de Disseny Gràfic de Catalunya, ha alcanzado su tercera edición y está en marcha la convocatoria de la cuarta. El premio se denominó en un principio Premios Proyecto Fin de Grado en Diseño Gráfico y la convocatoria abarcaba las cuatro primeras promociones (2012-2015). En la convocatoria del siguiente año el nombre se asentó como Premios Gaudeamus Projecta, primeros premios estatales para los proyectos de fin de grado en diseño gráfico. En ninguna de las dos denominaciones se pone de manifiesto su especificidad universitaria, pero estos premios son una ocasión magnífica para tomar el pulso al Diseño, más que a los diseñadores. El artículo trata de las tres primeras convocatorias de los Premios (2017, 2018 y 2019). En ellas parece que los diseñadores gozan de una excelente salud y de un estado eufórico, mientras las estructuras institucionales del diseño en las que flotan se adentran en un naufragio, al parecer, felizmente aceptado. El discurso aquí sostenido tiene forzosamente un tinte analítico y de controversia, en cuanto que se centra en la excepcionalidad programática de los premios, en contraste con sus contenidos y resultados, pues se puede adelantar que, pese a las buenas voluntades y los esfuerzos, parecen en general acordes con la “corriente principal”, que nivela e indiferencia el “mundo del diseño”.
Instructions for the preparation of a numerical investigation on crack parameters of cantilever beam using FEA
Authors: Ansari M.A. , Tiwari V.K.
Published: December 2021

Purpose: The operation of engineering structures may cause various type of damages like cracks, alterations. Such kind of defects can lead to change in vibration characteristics of cantilever beam. The superposition of frequency causes resonance leading to amplitude built up and failure of beam. The current research investigates the effect of crack dimensional parameters on vibrational characteristics of cantilever beam.
Design/methodology/approach: The CAD design and FE simulation studies are conducted in ANSYS 20 simulation package. The natural frequencies, mode shapes and response surface plots are generated, and comparative studies are performed. The effect of crack dimensional parameters is then investigated using Taguchi Design of Experiments. The statistical method of central composite design (CCD) scheme in Response Surface Optimization is used to generated various design points based on variation of crack width and crack depth.
Findings: The research findings have shown that crack depth or crack height have significant effect on magnitude of deformation and natural frequency. The deformation is minimum at 0.009 m crack height and reaches maximum value at 0.011 m crack height.
Research limitations/implications: The crack induced in the cantilever beam needs to be repaired properly in order to avoid crack propagation due to resonance. The present study enabled to determine frequencies of external excitation which should be avoided. The limitation of current research is the type of crack studied which is transverse type. The effect of longitudinal cracks on vibration characteristics is not investigated.
Practical implications: The study on mass participation factor has shown maximum value for torsional frequency which signifies that any external excitation along this direction should be avoided which could cause resonance and lead to amplitude build up.
Originality/value: The beams are used in bridge girders and other civil structures which are continuously exposed to moist climate. The moisture present in the air causes corrosion which initiates crack. This crack propagates and alters the natural frequency of beam.
Studies on the impact of external fire on the lye of the shelter housing
Authors: Baryłka A.
Published: December 2021

Purpose: The presented article presents a numerical analysis carried out to determine the impact of an external fire taking place on the surface of the ground on the level of stress of the trench shelter casing protected by a layer of soil.
Design/methodology/approach: Numerical analysis was carried out in two stages. In the first stage, a quasi-stationary distribution of the initial temperature in the centre of the ground and the shelter casing was sought. In the second stage of the analysis, the effect of the fire was considered according to the profile of time changes in the temperature of the shelter object.
Findings: We assume that the trench shelter is in an oblong shape, and the fire extends over a vast area. The area surrounding the shelter casing was treated as a material with average constant thermodynamic values.
Research limitations/implications: The process related to heating and cooling the enclosure was described on the basis of the Fourier equation on heat conduction in terms of the heterogeneous nature of the material, primer and concrete.
Practical implications: The use of the trench shelter model as a research element in the design of special objects.
Originality/value: The methods of non-stationary temperature flow through the ground and the shelter casing used, allows for a very realistic indication of how the housing will behave under the influence of high temperature caused by an external fire. The article can be useful for designers who design underground shelters.
Carbon nanostructure growth: new application of magnetron discharge
Authors: Breus A. , Abashin S. , Serdiuk O.
Published: December 2021

Purpose: The application of a common magnetron discharge to the growth of carbon nanostructures is studied. The simplicity of the proposed technique can be beneficial for the development of new plasma reactors for large-scale production of carbon nanostructures.
Design/methodology/approach: Graphite cathode was treated by carbon-containing powder accelerated by use of nozzle, and then aged in hydrogen. Superposition of glow and arc discharges was obtained, when putting the cathode under the negative biasing with respect to the walls of a vacuum chamber. The pulsed discharge was preserved through the whole time of treatment. This process was explained in terms of interaction of glow discharge plasma with a surface of the cathode made of non-melting material.
Findings: The plasma treatment resulted in generation of the diverse nanostructures confirmed by SEM and TEM images. Spruce-like nanostructures and nanofibers are observed near the cathode edge where the plasma was less dense; a grass-like structure was grown in the area of “race-track”; net-like nanostructures are found among the nanofibers. These findings allow concluding about the possible implementation of the proposed method in industry.
Research limitations/implications: The main limitation is conditioned by an explosive nature of nanostructure generation in arcs; thus, more elaborate design of the setup should be developed in order to collect the nanospecies in the following study.
Practical implications: High-productivity plasma process of nanosynthesis was confirmed in this research. It can be used for possible manufacturing of field emitters, gas sensors, and supercapacitors.
Originality/value: Synthesis of carbon nanostructures is conducted by use of a simple and well-known technique of magnetron sputtering deposition where a preliminary surface treatment is added to expand the production yield and diversity of the obtained nanostructures.
Optimum transportation of relief materials aftermath the disaster
Authors: Nautiyal A. , Kumar A. , Poddar A. , Parajuli N.
Published: December 2021

Purpose: Natural disasters disrupt not only the lives of individuals but also the functioning of society. Given the unpredictability of disasters and the uncertainty associated with them, preparation is the best way to mitigate and reduce the effects of the disaster.
Design/methodology/approach: The study presents a mathematical model in the form of a multi-objective linear programming problem for the relief distribution from the airports which minimizes the total operational cost as well as travel time. Further, the solution approach and analytical results have also been discussed.
Findings: The main aims at the preparedness stage are to identify and build infrastructures that might function as useful operation centres during a disaster. The study also provides decisions that include the type and number of vehicles for each affected location.
Research limitations/implications: Airports can function as centres for relief collection and distribution. However, relief operations carried out through airports are often subject to problems such as stockpiling. Further, various modes are available for the transport of relief supplies- air, water, and land transport modes primarily. While aircraft and helicopters are faster, their costs of operation are too high. Instead, trucks are economical but very slow as compared to aircraft.
Practical implications: The choice of model depends on many factors including the availability of vehicles, availability of routes, and criticality of situations. The choices made in turn affect the costs and the time of operations.
Originality/value: The model converts a disaster scenario into a demand-supply problem with the aim being to decide allocations at specified intervals of time.
THE INFLUENCE OF SYNTHETIC HYDROCARBON ON
LUBRICATING PROPERTIES OF FUELS FOR TURBINE ENGINES
Authors: Kaźmierczak Urszula W. , Kulczycki Andrzej , Ozimina Dariusz
Published: December 2021

Recently, steps have been taken to introduce synthetic hydrocarbons to aviation fuels as biocomponents.
This action is an innovative change in the approach to aviation fuels. This new approach to the assessment
of fuel properties requires a revision of the existing criteria for their quality assessment, including those
relating to tribological properties. In the requirements for Jet fuel, only the BOCLE test simulating continuous
circular motion was used to assess lubricity. Research on the use of fuels containing components with highly
differentiated chemical compositions indicate that the BOCLE test may be an insufficient criterion for
assessing the lubricity of fuels for aircraft turbine engines. An additional HFRR test modelling the processes
accompanying the reciprocating friction that occurs in some lubricated elements of the fuel system has been
proposed. This article presents the results of BOCLE and HFRR tests on a range of Jet A1 fuel mixtures
and various synthetic paraffin hydrocarbons. A preliminary analysis of the observed effect of synthetic
hydrocarbons on the results of both tests is presented.
ASSESSMENT OF ABRASIVE WEAR RATE FOR PTFE-BASED
COMPOSITES IN COMBINATION WITH STEEL
Authors: Lemecha Magdalena , Ligier Krzysztof , Napiórkowski Jerzy
Published: December 2021

This paper presents a study of the tribological wear rate for PTFE-based composites in combination with
C45 steel. PTFE composites with the addition of glass fibre, bronze, carbon fibre, and graphite were selected
for the study. Tribological tests were conducted in a roller-block combination over an expanded contact area
with no lubrication, using an SMC-2 machine. The study assessed the mass and volumetric wear for the
test materials and the wear rate index. The highest wear values were noted for the PTFE composite with the
addition of bronze, while the lowest was for the PTFE composite with the addition of glass fibre. For all the
test materials, the formation of a polymer film on the steel counter specimen was noted.
Ancestry Estimation in Practice
Authors: Parsons Hillary
Published: December 2021

The medicolegal system relies on forensic anthropologists to construct accurate biological profiles from skeletal remainsto narrow the pool of potential missing persons and provide support for positive identifications. The ancestry estimation component of theprofile offers physical descriptions of decedents through a combination of metric analysis and the interpretation of discrete traits believedto correlate with visible physical features. Forensic anthropologists employed in medical examiners’ offices in the United States regularlyconstruct these profiles in casework. However, ancestry estimation methods have been questioned in their ability to accurately describe theracial classification of the deceased. Although validation studies have documented the accuracy of ancestry estimation methods on skeletalcollections, it is unknown how well they operate in forensic casework and the assumption that methods mirror the results observed inacademic research studies remains unproven. In an effort to understand how well methods preform, this research was designed to evaluatethe accuracy ancestry estimation practices within three medical examiners’ offices in the United States. The results show an accuracy rateof 99% among 177 cases when both definitive and ambiguous ancestral and racial terminology was used to describe remains. Becauseunidentified cases lack antemortem information, it remains unknown if the ancestral assessments of the 280 unidentified individualsincluded in this study confer the same level of accuracy shown in resolved cases. The results presented here are informative not only forthe vital statistics obtained, but also for what this data reveals about the factors influencing ancestry estimation in practice.
Biomarkers in GDM, Role in Early Detection and Prevention
Authors: Banerjee Samar
Published: December 2021

Gestational Diabetes Mellitus (GDM) happens to be a very frequent and major complication of pregnancy because of higher morbidity and mortality, both for the mother and the baby. After delivery, GDM carries the risk of higher maternal morbidity due to post pregnancy obesity, development of diabetes mellitus, obesity and also cardiovascular diseases in significant number in both the mother and child for future. As per current guidelines, GDM is diagnosed at the end of the second trimester by elevated blood glucose values when, foetal damages by metabolic and epigenetic changes had already started. As a result, treatments cannot be started before the late second or third trimester, when the process of high risk of foetal morbidity and mortality has been set in. If by any method we can predict development of GDM at earliest part of first trimester or even more overjealously, we can predict, before pregnancy, then and then only we can avoid many disasters induced by GDM. With this idea many biomarkers, both clinical and laboratory based like clinical, metabolic, inflammatory and genetic markers etc., related with early pregnancy metabolic alterations have been studied for their potential to help in the prediction of later pregnancy glucose intolerance. Though promises are seen with some biomarker-enhanced risk prediction models for GDM, but lack of external validation and translation into day-to-day clinical applications, cost effectiveness, with which they may be utilized in routine prenatal care has limited their clinical use. But future is very promising and incorporating the biomarkers which precede the onset of hyperglycaemia into a risk prediction model for GDM and may help us for earlier risk assessment, screening, and diagnosis of GDM and also prevention of its both the immediate and remote complications. This review highlights the current knowledge of the understanding of the candidacy and practical utility of these biomarkers for GDM with recommendations for further research.
Landslide Analysis over Creep Theory - Crack Propagation of Shale Slopes in Şırnak Asphaltite Coal Mine Site 1 and 2
Authors: İsmail Tosun Yildirim
Published: December 2021

The soft rock and wet slopes increase landslides over 50 m long creep slide and risk assessment for long steep slide in Şırnak open-pit coal mining should be searched in asphaltite quarries. The Avgamasya quarries No1 and 2 at critical depths and road bench sites in Şırnak, reaching over 120 m height with 60–65° shale slopes, developing major creep factors and other factors for landslide in the deep quarry locations is resulting debris rock falling or free sliding. The pore pressure measurements by measurements of water levels in four wells and water flow counting as the mining safety in recent years. This research provided rock slope stability patterns and crack propagation control of the hazardous location and formation cracks. The stages of creep experimentation explored the geophysical characteristics and thaw and freeze testing of rock samples. For this aim, two different long sliding areas with similar geoseismical conditions, two main analyzing methods, and patterns of researches were developed. Firstly, data on crack propagation in situ rock shale faces over certain time periods were determined. Displacement measurements over highly saturated shale—limestone contacts over the base of crack counting in a meter scale such as Rock Quality Designation (RQD) scoring of drilling logs. Secondly, hydrological water level logs were taken into consideration. On the other hand, due to that creep effect over freeze crack propagation unseen cause instability over wet sliding surfaces over 50 m, long sliding surface matter over slopes, poly linear or circle type creep sliding or rock tumbling falling failure types, and GEO5 slope stability, slice analysis will be advantageous instead of Finite Element Method (FEM) method.
Wooden Extra Stories in Concrete Block of Flats in Finland as an Ecologically Sensitive Engineering Solution
Authors: Karjalainen Markku , Emre Ilgın Hüseyin , Somelar Dennis
Published: December 2021

This chapter examined the various stages and benefits of wooden extra stories from the perspective of Finnish housing and real estate companies through interviews with professionals involved in these projects. Key findings highlighted are as follows: (1) in the feasibility study, project planning primarily focuses on property condition and potential improvement targets as well as other considerations, for example, compliance with current regulations and parking arrangements; (2) in the project planning, application of extra stories is thoroughly examined, and construction costs, profits, and the sale of building rights are discussed; (3) in implementation planning, issues related to building rights, city plan change, and conditions of the company that manages the property play an important role; and (4) during construction, frequent information updates are made to residents regarding the site arrangements and the construction program. Wooden extra floor construction, which requires commitment, investment, and cooperation among the interested parties, has great potential in construction technology, contracting mechanisms, and ecological engineering solutions. It is believed that this chapter will increase the dissemination of wooden extra stories, thus contributing to the greater use of more sustainable materials in renovation projects and the ecologically sensitive engineering approaches to meet the challenges arising from climate change.
Does COVID-19 Affect Adult Neurogenesis? A Neurochemical Perspective
Authors: Saikarthik Jayakumar , Saraswathi Ilango , A. Al-Atram Abdulrahman
Published: December 2021

COVID-19 has been found to cause neuropsychiatric symptoms which indicate brain involvement. SARS-CoV-2 may enter the brain by damaging and penetrating olfactory mucosa and via other possible routes like damaged blood–brain barrier, and hematologic spread. With SARS-CoV-2 having a higher affinity to ACE2 receptors, brain regions that have higher ACE2 receptors like the hippocampus, are more vulnerable to the effect of the viral invasion. In addition, immune cell activation, an important feature of COVID-19, leads to cytokine storm which causes neurotoxicity, neuroinflammation, and neurodegeneration. Impaired adult neurogenesis is related to many psychiatric disorders including depression, bipolar disorder, anxiety disorder, schizophrenia, and PTSD. It is known to be related to the depletion of neurotransmitters, dopamine, serotonin, norepinephrine, GABA, and glutamate which play a major role in adult neurogenesis. A recent study reveals that SSRI which acts by increasing serotonin is proven beneficial in COVID-19 patients. Thus, the current chapter will discuss the impact of COVID-19 on adult neurogenesis with emphasis on the role of ACE2 and neurotransmitters.
Ventilation Strategies in Obese Patients
Authors: Pobeha Pavol
Published: December 2021

Obesity is an increasingly prevalent disease and is a root and complication of conditions necessitating mechanical ventilation. Obese patients require a careful approach due to the particular manner of how ventilatory mechanics is affected, if obstructive sleep apnea (OSA) is present. The two main diagnoses we may encounter while ventilating these patients are obesity hypoventilation syndrome (OHS) and chronic obstructive pulmonary disease (COPD) in an obese patient, which has been recently proposed as a novel phenotype of COPD. The excessive amount of fat in the abdomen, chest wall, and around upper airways warrants the use of special ventilation modes and settings. This chapter provides insight into which issues should be considered when ventilating an obese patient, either in acute or chronic conditions. We stress the importance of acknowledging the high risk of OSA and how OSA affects the ventilation algorithms.
Thrombolysis in Acute Stroke
Authors: Çetiner Mustafa
Published: December 2021

The first step in stroke care is early detection of stroke patients and recanalization of the occluded vessel. Rapid and effective revascularization is the cornerstone of acute ischemic stroke management. Intravenous thrombolysis is the only approved pharmacological reperfusion therapy for patients with acute ischemic stroke. Patient selection criteria based on patient characteristics, time, clinical findings and advanced neuroimaging techniques have positively affected treatment outcomes. Recent studies show that the presence of salvageable brain tissue can extend the treatment window for intravenous thrombolysis and that these patients can be treated safely. Recent evidence provides stronger support for another thrombolytic agent, tenecteplase, as an alternative to alteplase. Endovascular thrombectomy is not a contraindication for intravenous thrombolysis. Evidence shows that the bridging approach provides better clinical outcomes. It is seen that intravenous thrombolysis is beneficial in stroke patients, whose symptom onset is not known, after the presence of penumbra tissue is revealed by advanced neuroimaging techniques. Reperfusion therapy with intravenous thrombolysis is beneficial in selected pregnant stroke patients. Pregnancy should not be an absolute contraindication for thrombolysis therapy. This chapter aims to review only the current evaluation of intravenous thrombolytic therapy, one of the reperfusion therapies applied in the acute phase of stroke.
Tau in Health and Neurodegenerative Diseases
Authors: Chu Dandan , Liu Fei
Published: December 2021

Tau, one of the major microtubule-associated proteins, modulates the dynamic properties of microtubules in the mammalian nervous system. Tau is abundantly expressed in the brain, particularly in the hippocampus. Insoluble and filamentous inclusions of tau in neurons or glia are discovered in neurodegenerative diseases termed ‘tauopathies’, including Alzheimer’s disease (AD), argyrophilic grain disease (AGD), corticobasal degeneration (CBD), frontotemporal dementia (FTD), Pick’s disease (PiD) and progressive supranuclear palsy (PSP). Accumulation of intracellular neurofibrillary tangles (NFTs), which are composed of hyperphosphorylated tau, is directly correlated with the degree of Alzheimer\'s dementia. This chapter reviews the role of tau protein in physiological conditions and the pathological changes of tau related to neurodegenerative diseases. The applications of tau as a therapeutic target are also discussed.
Graves’ Disease
Authors: Saran Sanjay
Published: December 2021

Graves’ disease (GD) is an autoimmune disorder characterized by presence of TSH receptor autoantibody. It is most common cause of hyperthyroidism worldwide. Though GD can occur any age but peak incidence is seen during adulthood in between 20 to 50 years of age. GD is more commonly seen in female. GD is primarily disease of thyroid gland but affects multi organ system i.e. heart, liver, muscle, eye and skin. Symptoms and signs are result from hyperthyroidism or a consequence of underlying autoimmunity. Weight loss, fatigue, heat intolerance, tremor, and palpitations are the most common symptoms. Diffuse goiter presents in most of younger patients with thyrotoxicosis but less common in older patients. Graves’ ophthalmopathy and pretibial myxedema are extrathyroidal manifestations of GD which results from action of TSHR autoantibodies on TSHR present onfibroblast, adipocyte and T cells in extrathyroidal tissue. Treatment of GD remains in between antithyroid drugs, radioiodine or surgery. In this review we discuss the diagnosis and management of GD.
Publikasieaankondigings / Publication Announcements
Authors: Harteveld Tanja
Published: December 2021

Publication Announcements