bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluation of the National Urban Community Empowerment Program
Authors: Suparno Suparno
Published: January 2020

The main problem in this study is the low level of community participation in the implementation of National Urban Community Empowerment Program (NUCEP) in Grobogan Regency. This can be seen from the lack of community involvement in the entire process of the activity stage. The purpose of this study was to find out how the level of community participation in the implementation of NUCEP in Grobogan Regency. This research method uses a qualitative descriptive approach. Data analysis used qualitative and tirangulasi data analysis techniques. The evaluation model used is the Context, Input, Process and Product. The evaluation results show that the implementation of NUCEP is good, the context of the implementation of NUCEP is good, the input of NUCEP is good, but the available funds are insufficient to meet community needs; the implementation process went well, at the stage of preparation for less community participation especially in the FGD on Reflections on Poverty and the Preparation of Medium-Term Planning for Poverty Reduction Programs; then the implementation of the activities went well and the products of the NUCEP activities in the form of physical activities benefited the community. Based on the evaluation results it is recommended that, the effectiveness of NUCEPÂ  needs to be increased, the NUCEP District apparatus must be more democratic and participatory in the implementation of planned programs. Community involvement must always be encouraged in all processes and stages of activities, starting from planning, implementation, monitoring and evaluation, and in the preparation of reporting for each activity.
Evaluation of Institutional Development : Case on Private Forest Farmer Group in Sumbawa Regency
Authors: Diniyati Dian -
Published: January 2020

Although a large number of studies have been conducted to evaluate the success of farmer groups, a comprehensive evaluations starting from group formation process has not been carried out much.Â  This research rates the success of farmer groups as a vehicle to improve the livelihoods of farmers in the area of Management Unit of Production Forest (KPHP) of Puncak Ngengas-Batu Lanteh, Sumbawa. The success was measured by evaluating three roles of farmer groups namely, Â a) class for learning, b) forum for collaboration, and c) unit for production. This research was conducted in two periods, i.e. on April 2016 and April 2017. The sample consisted of 20 forest farmers selected purposively, the data were collected through interviews and focus group discussion techniques and analysed descriptively. This study revealed that the roles scale of farmer groups as class for learning and as a forum for collaboration were categorized as low level, while as a unit for production was categorized as moderate level. These categories show that in general the farmer group had not succeeded in carrying out its function as a class for learning, and as a vehicle for collaboration, except as a unit for production. This weak condition was utilized by middlemen to take advantages from marketing activity by controlling forest product prices. Â The Kanada farmer group was categorized in the beginner group which needs 75 % intervention from outsider such as continual mentoring by counsellors to grow the attitude from working alone to working together in a group.Â
Reducing Variation in the Management of Apnea of Prematurity in the Intensive Care Nursery
Authors: Coughlin Katherine , Posencheg Michael , Orfe Lauren , Zachritz Whitney , Meadow Jaqueline , Yang Kesi , Christ Lori
Published: January 2020

BACKGROUND:

Premature infants have bradycardia and/or desaturation events due to apnea of prematurity that resolve as the infants mature. Despite American Academy of Pediatrics guidelines recommending a standard “event-free” period before discharge, length of observation in our Intensive Care Nursery was variable. By June 2018, for infants born <36 weeks’ gestation in the Intensive Care Nursery, we aimed to standardize time to discharge after the last documented event at 5 days, when the baseline mean was 3.6 days (range 0–6 days).

METHODS:

A quality-improvement team used the Model for Improvement. Plan-do-study-act cycles improved nursing documentation of events and standardized discharge criteria after consensus on operational definitions. The outcome measure was days to discharge after last documented event. Process measures included percentage of events documented completely and correctly in the electronic medical record. Balancing measure was length of stay after 36 weeks’ corrected gestational age. We used statistical process control.

RESULTS:

The baseline event watch ranged from 0 to 6 days. After defining significant events, documentation expectations, and consensus on a 5-day “watch” before discharge, the event watch range narrowed with a mean that shifted from 3.6 to 4.8 days on X-bar S statistical process control chart. Completeness of documentation increased from 38% to 63%, and documentation of significant events increased from 38% to 88%. Length of stay after 36 weeks’ corrected gestational age was unchanged, and nursing satisfaction improved.

CONCLUSIONS:

We found decreasing variation in the management of apnea of prematurity while simultaneously improving staff satisfaction. Next steps include revising electronic medical record flowsheets and spread to network NICUs.
Liberdade e Necessidade em Hobbes: Reflexões sobre o livre arbítrio nas origens do Estado moderno
Authors: Teixeira Anderson Vichinkeski
Published: January 2020

No presente artigo pretende-se abordar o conceito de liberdade nas principais obras de Thomas Hobbes, objetivando discutir a centralidade do manuscrito Liberdade e Necessidadepara a compreensão das variações que caracterizam o pensamento hobbesiano na abordagem do referido conceito. A pouca clareza que se verifica na noção de liberdade decorre, em parte, de mudanças de convicção do filósofo quanto à possibilidade de usar de modo diferente a liberdade do indivíduo como entidade física e a liberdade do indivíduo no seio do corpo político. Todavia, será sustentado, como hipótese teórica para a presente pesquisa, que ao longo do debate com Bramhall teria sido possível a Hobbes esclarecer muitas dessas imprecisões terminológicas e variações conceituais, sobretudo no que toca a relação entre liberdade e necessidade na sua teoria das causas antecedentes.
National identity and stereotypes of Poles and Germans among rural youth in Opole Silesia
Authors: Mazur Katarzyna
Published: January 2020

In Opole Silesia there live a combination of people describing themselves as Poles, Germans and Silesians. Young people there have to deal with that mix, being influenced by such forces as globalization. The purpose of this research was to discover how youth feel and understand their nationality and what stereotypes they share. The analysis consisted of several tasks. Students had to describe themselves by national and ethnic categories. They were asked how they felt about Germans and which stereotypes they found to be true or false. The paper includes analysis from earlier research on this topic.
John Ruskin’s word paintings in the context of his principle of clear vision as well as the biblical and rhetorical tradition
Authors: Piasecka Aleksandra
Published: January 2020

This paper focuses on the chosen ekphrases (i.e. literary descriptions of visual works of art) which can be found on the pages of the treatises on painting and architecture written by John Ruskin, one of the most influential Victorian critics. However, these detailed and suggestive passages did not only serve the complementary purpose of illustrating the train of thought of the art connoisseur who was sharing his impressions from the continental tour with the readers. The style of word paintings also owes much to Ruskin’s intended lesson in astute observation, regarded as a necessary precondition to understanding the world, and his self-appointed function as a moralist who foresaw the danger of the spiritual decline looming over England. For this reason, first the critic’s notions of truth and nature will be discussed to elucidate the importance of clear perception in Ruskin’s writings. Then the ekphrases will be analyzed, paying special attention to their language which reveals the roles assumed by the critic. Simultaneously, references to the sources of Ruskin’s style, the Bible and ancient rhetoric, will have to be made.
Institutions of higher education and the idea of lifelong learning
Authors: Marcinkiewicz Aleksandra
Published: January 2020

The idea of lifelong learning is very popular in the XXI century. This paper presents how Polish universities reflect this idea. The main theories of andragogy were compared with each other and a relationship was shown, between this concept and adult education. Moreover, it analyses the effectiveness of different management styles continuing education in Polish universities and their implications for institutions of higher education. It also describes the main programs of the European Commission to promote lifelong learning in Europe.
A Debate on the Relationship between Poetry and Politics in W.H. Auden’s In Memory of W.B. Yeats and A. Ostriker’s Elegy before the War
Authors: Marecki Mateusz
Published: January 2020

W.H. Auden’s In Memoriam W.B. Yeats and A. Ostriker’s Elegy Before the War are two pre-war elegies, in which personal and political dimensions are juxtaposed. W.H. Auden’s poem portrays the death of a celebrity against the background of the perplexing 1930s when there was evident growing anxiety about Facism and its repercussions. In her long, 7-section work, A. Ostriker not only commemorates her dead mother, she also formulates a very powerfully articulated anti-war manifesto, in which she both denounces American imperialism during the 2nd Iraq war and questions the meaning of war and violence. W.H. Auden’s elegy serves as a starting point for a debate A. Ostriker sparks over the role of poetry and its relationship with politics. When analysed together with the author’s essays on poetry, their other famous poems and their post-war elegies (The Shield of Achilles and TheEight and Thirteenth), the two poems taken under examination display that the poets’ stance concerning the role of poetry is neither explicit nor consistent. It is interesting also how the debate can be perceived in the context of a dilemma signaled in A. Ostriker’s Poem Sixty Years After Auschwitz where the poet deliberates over what should be the appropriate shape and tone of poetry after the Holocaust.
The application of Lie algebras and groups to the solution of problems of partial stability of dynamical systems
Authors: Nikonov Vladimir I.
Published: January 2020

The article is devoted to the analysis of partial stability of nonlinear systems of ordinary differential equations using Lie algebras and groups. It is shown that the existence of a group of transformations invariant under partial stability in the system under study makes it possible to simplify the analysis of the partial stability of the initial system. For this it is necessary that the associated linear differential operator Lie in the enveloping Lie algebra of the original system, and the operator defined by the one-parameter Lie group is commutative with this operator. In this case, if the found group has invariance with respect to partial stability, then the resulting transformation performs to the decomposition of the system under study, and the partial stability problem reduces to the investigation of the selected subsystem. Finding the desired transformation uses the first integrals of the original system. Examples illustrating the proposed approach are given.
Differential equations for recovery of the average differential susceptibility of superconductors from measurements of the first harmonic of magnetization
Authors: Kuzmichev Nikolay D. , Vasyutin Mikhael A. , Shitov Almir Yu. , Buryanov Igor V.
Published: January 2020

In the paper, inhomogeneous differential equations are obtained to reconstruct the average differential susceptibility of type-II superconductors from the in-phase (real) component of the magnetization’s first harmonic in the hysteresis case. Basing on the second-order differential equation, mathematical modeling of the average differential susceptibility for the theoretical and experimental dependence of the real part of the magnetization’s first harmonic is performed. The Cauchy problem was solved numerically by the Runge-Kutta method of the fourth order of accuracy. To do this, the differential equation for the restoration of the average susceptibility was reduced to a system of differential equations. On the basis of the method developed in the work, the average differential susceptibility of a disc-shaped polycrystalline superconductor YBa2Cu3O7−x was reconstructed from the experimentally obtained first harmonic of magnetization in interval of magnetic fields from 0 to 800 Oe.
Grace Herrera Amighetti
Authors: Alpízar Lobo Ariana , Blanco Murillo Patricia
Published: January 2020

Se reconoce la extensa y valiosa carrera de la artista.
Detecção precoce do câncer de próstata: atuação de equipe de saúde da família
Authors: SOARES CARINE JESUS , Santos Josimeire , Santos Ribeiro Bárbara , Silva Passos Rafael , Barreto Neta Meira Adélia Pita , Soares Carine Jesus
Published: January 2020

O objetivo desta investigação foi compreender a atuação de Equipes de Saúde da Família sobre a detecção precoce do câncer de próstata. É uma investigação pesquisa de abordagem qualitativa realizada com 10 profissionais de saúde, entre eles médicos, enfermeiros, técnicos de enfermagem e agentes comunitários de saúde, de duas Unidades de Saúde da Família de Jaguaquara, Bahia, Brasil. Para a coleta de dados foi aplicado a entrevista semiestruturada norteada por um roteiro contendo cinco questões inerentes a temática. As informações produzidas foram submetidas à técnica de análise do conteúdo de Bardin, que originaram três categorias temáticas. Ressalta-se que o projeto foi aprovado pelo Comitê de Ética em Pesquisa, sob parecer nº. 1.644.785. Entre os resultados foram obtidos: Ações para promoção da detecção precoce do câncer de próstata; Importância do Diagnóstico Precoce; Fatores que dificultam a detecção precoce do Câncer de próstata. Conclui-se que diante da problemática existente acerca da procura dos serviços de saúde pelo público masculino, é preciso que os profissionais estejam preparados e capacitados de forma que os programas de saúde possam cumprir seus objetivos de promoção e prevenção eficaz.
¿La gestión de competencias influye en la efectividad organizacional? Apuntes para la reflexión desde la práctica en empresas cubanas
Authors: Medina Macías Arianne , Vitier Sánchez Amanda
Published: January 2020

La investigación se inserta en los marcos de la Psicología Organizacional aplicada al contexto empresarial cubano, donde la Gestión del Capital Humano (GCH) cobra gran significación en la política económica y social del país. En aras de desarrollar las potencialidades de las personas, la Gestión por Competencias (GC) se erige como referente teórico-metodológico por excelencia, materializándose en las Normas Cubanas del Sistema de Gestión Integrada de Capital Humano (SGICH).Partiendo de la importancia que se le concede al perfil del cargo por competencias como herramienta útil que permite potenciar un desempeño superior del trabajador y la organización; la investigación tiene como objetivo valorar la efectividad de diez empresas cubanas certificadas con el SGICH a partir de que comenzaran a gestionar las competencias de sus trabajadores. Para esos fines se utilizó una metodología cualitativa, mediante el método de estudio de casos múltiples. En la valoración de la efectividad organizacional se halló como regularidad una mejoría en los indicadores tangibles e intangibles estudiados, ya que en la mayoría de las empresas los resultados son favorables.
Tratamiento de relajación con biofeedback para la disminución de la frecuencia de los tics en un estudiante universitario con Síndrome de Tourette.
Authors: Alvarado Hidalgo Catalina , Angulo Castro Valeria , Beirute Herrera Julianne , Luna Aguilar Ariana , Molina Mesén Isabel
Published: January 2020

El presente artículo consiste en un tratamiento de relajación con equipo de biofeedback que tiene como objetivo la reducción de los tics en un estudiante universitario con el síndrome de tourette. Dicho padecimiento es un desorden neuropsiquiátrico que presenta movimientos espontáneos y repetitivos conocidos como tics. La relajación se induce por medio de respiración diafragmática y con el método conocido como relajación muscular progresiva a lo largo de 5 sesiones. Se logra reducir el número de tics en más de un 50% para la sexta sesión.
Efecto de la experiencia corporal de frío sobre la calidez interpersonal hacia grupos sociales. Un estudio desde la cognición corporizada
Authors: Jara Sanabria Fiorella
Published: January 2020

Para la cognición corporizada el sistema sensoriomotor es parte constitutiva de los procesos cognitivos, por ello se enfoca en la relación entre cuerpo físico y las capacidades perceptivas. Con el propósito de incrementar la evidencia de este tema en Costa Rica, se desarrolló un experimento para establecer el efecto de la experiencia corporal de frío sobre la actitud hacia grupos sociales en estudiantes universitarios. La manipulación experimental se realizó mediante el ajuste a 19,5 C° de temperatura del aire acondicionado de la sala del grupo tratamiento. La muestra la conformaron 40 estudiantes de la Universidad de Costa Rica (20 en cada grupo de tratamiento) quienes contestaron un cuestionario con dos escalas. Los resultados no muestran diferencias significativas entre grupos, lo cual permite rechazar la hipótesis planteada. Sin embargo, la calificación general de los participantes, mostró una actitud desfavorable hacia las personas homosexuales, con lo cual se concluye que hubo presencia de homofobia en la muestra.
Prácticas decoloniales en las redes sociales de estudiantes universitarios
Authors: Ramos Galarza Carlos Alberto , Freire Muñoz Irina Alejandra
Published: January 2020

El   presente   artículo   reporta   un   estudio   sobre   prácticas   decoloniales   de estudiantes   universitarios   en   redes   sociales.   El   diseño   de   investigación   se basó en   una   metodología   cuantitativa   de   tipo   transversal   y   alcance   correlacional.   La   muestra   estuvo   conformada   por   201   estudiantes   universitarios   de   Quito,   Ecuador.   El   estudio   se   constituyó  en  dos  fases:  (a)  construcción  y  validación  de un  instrumento  para  valorar  las   prácticas  decoloniales  en  redes  sociales  y  (b)  el análisis  de  las  prácticas  decoloniales  de   los   estudiantes   participantes.   Los principales   resultados   encontrados   sugieren   que,   los   jóvenes   universitarios presentan   un   nivel   bajo   de   postura   crítica   ante   la   política   actual,   tanto hombres  como  mujeres  poseen  la  misma  postura  de  ingenuidad  ante  las  prácticas   hegemónicas  políticas,  además  de  manifestar  un  desencanto  por  la  política  actual.
El cine corporizado como propuesta política
Authors: Alpízar Guerrero Mariana
Published: January 2020

En este artículo se propone la categoría de cine corporizado para nombrar propuestas artísticas que se dan en el audiovisual desde una posición de crítica radical, como es el caso del cine de autor y específicamente de películas de Jean Luc-Godard, fundamentalmente las presentadas en los años 60s. Estos filmes cuestionan las dicotomías cuerpo-mente, razón-emoción y ética-estética cuando conjugan estos aspectos para entablar un diálogo con los sujetos que miran, dándoles así un lugar de agenciamiento político e invitándoles a realizar transformaciones colectivas pero también personales. De acuerdo a la anterior propuesta se realiza un recorrido a través de cuatro apartados en donde se intentan analizar forma, fondo, subjetivación, ideología, ética y estética, con ejemplos concretos de la obra godardiana. El primero de ellos se denomina La técnica y estética en el cine posmoderno, el segundo Expresión de subjetividad como forma de activismo y el tercero ¿Materialidad versus subjetividad? Una dicotomía que se cuestiona en el cine corporizado, por último Ética y estética como forma de rebelión. A partir de ello se busca no sólo hacer una descripción del concepto propuesto sino, fundamentalmente, iniciar un diálogo entre quienes leen y quien escribe, también como forma de ruptura de las barreras entre palabra y acción.
Egoyan y Freud: construcciones intermediales en cine
Authors: Schroeder Kira
Published: January 2020

Este trabajo relaciona intermedialidad y psicoanálisis a partir de la película Ararat, del director Atom Egoyan. La película se basa en un cuadro del pintor Arshile Gorki, pintor estadounidense de origen armenio, que intenta reinventarse en Estados Unidos después de haber sobrevivido el genocidio de su pueblo. La autora argumenta que los recursos utilizados por el cineasta para construir la historia detrás del cuadro del pintor y su madre, tienen su paralelo en los recursos que Freud utiliza para reconstruir el origen de las fantasías congeladas de sus pacientes. El arte y el psicoanálisis ambos, entonces, encuentran la necesidad de hechar mano de varios medios, y los espacios donde intersectan, para reconstruir la historia.
Música y psicoanálisis, sonidos y silencios del cuerpo
Authors: Calderón-Chavarría Isabel , Ledezma-Jiménez Álvaro , Quesada-Jiménez Nancy , Valerio-Bogarín Mónica , Villalobos-Ulate Marianela
Published: January 2020

En el presente artículo, se desarrollará una investigación bibliográfica, cuya finalidad consiste en mostrar el arte de la música más allá de esta como expresión artística, sino como esta se convierte en la voz de lo que necesita ser dicho en el cuerpo, y por el cuerpo. Así mismo se indagará en aspectos relacionados a la música y su historia, la música como acto primitivo, los componentes que la construyen y los afectos que surgen a partir de ella, además al ser estudiada desde un enfoque psicoanalítico se presenta la música desde los tres registros presentados por Lacan.Palabras clave: Música; psicoanálisis; lenguaje; cuerpo.
Development and validation of HPLC/DAD method for simultaneously determination of six prohibited substances in model matrices
Authors: Zaharieva Zdravka , Tanev Dimitar , Danalev Dancho
Published: January 2020

The authorities have identified an emerging trend where over-the-counter products, represented as dietary supplements, contain hidden active ingredients that could be harmful. Consumers may unknowingly take products laced with varying quantities of approved prescription drug ingredients, controlled substances, and untested and unstudied pharmaceutically active ingredients. Hidden ingredients are increasingly becoming a problem in products promoted for sexual enhancement, weight loss, or bodybuilding. The tests have revealed the presence of some undesired substances like sildenafil, tadalafil, vardenafil, and their analogues in tainted sexual enhancement products. The content of these substances is usually around the daily curative dose. A simple high-performance liquid chromatography (HPLC) method for simultaneously determination of sildenafil, vardenafil, tadalafil, dapoxetine, yohimbine, and sibutramine was developed and validated. InfinityLab Poroshell 120 EC-C18 (150 '4.6 mm '4 μm particles) was used, as well as a diode-array detector (DAD) at 230 nm, and a gradient flow with 0.030 М ammonium acetate buffer and acetonitrile. The method is linear in the following range: 2.5–37.5 μg/mL for yohimbine, 2.06–30.9 μg/mL for vardenafil, 2.0–30.0 μg/mL for sildenafil, 3.1–46.5 μg/mL for tadalafil, 1.98–29.7 μg/mL for dapoxetine, and 2.2–66.0 μg/mL for sibutramine. The linearity coefficient is R2 = 1 for all substances. Model matrices were spiked, and the analytical recoveries for all substances are in the range 97.5%–99.5%. The method exhibited an upper hand compared with previously reported methods in terms of speed and simplicity. Additionally, the mobile phase (also used as extracting, column washing, and diluting solvent) was composed of only buffer and acetonitrile, which rendered the method much cheaper than others.
Experimental and theoretical study of mechanical deformation of freezing saturated soil
Authors: Zhelnin M S , Prokhorov A E , Kostina A A , Plekhov O A
Published: January 2020

An intensive development of infrastructure in the far North and application of the artificial ground freezing technology for construction of civil and industrial buildings require an accurate description of frost heave caused by freezing of pore water in soils. It is important to understand this processes at the developing stage for the aim of safety exploitation of constructions. The present work is devoted to an experimental and theoretical study of the frost heave in laboratory samples of water saturated sand. Artificial freezing of the sample is performed in a chest freezer. During freezing measurements of temperature and strain are carried out by a control system consisting of a set of thermocouples and fiber optic sensors based on Bragg gratings. To analyze the obtained experimental data, a thermo-hydro-mechanical model has been developed. Water saturated soil is supposed to be three phase porous media consisting of a drained skeleton, water and ice. The model includes the energy conservation equation, the mass balance equations for moisture and ice content, the equilibrium equation and the constitutive relations taking into account an influence of the phase transition of water on heat and mass transfer and the additional volumetric strain. The numerical solution of the nonlinear partial differential equations of the model is performed by the finite element method. The feature of the model is a possibility to take into account the crystallization kinetics on the frost heave of the freezing saturated soil. As a result of the study, a good qualitative and quantitative agreement between a temperature measurement in the volume of the sample and the results of the simulation has been obtained. A comparison of the fiber-optic sensors readings with the results of the numerical simulation has shown that the calculated values are slightly deviated from the experimental ones. On the basis of the measurements analysis and the numerical results it can be concluded that the frost heave proceeds in a long time after the phase transition starts within the temperature range below the temperature of water freezing.
Energy product in a crack-like defect model under loading of mode II type
Authors: Glagolev V V , Glagolev L V , Markin A A
Published: January 2020

The loading of a crack-like defect in mode II is considered. In contrast to the classical representation of a crack in the form of a mathematical cut, the proposed model defines a crack in the form of a physical cut with a characteristic linear size. The mental continuation of a physical cut in a solid forms an interaction layer. It is significant that the stress-strain state of the layer does not introduce a singularity to the crack model. The product of the increment of the specific free energy in the face square element of the layer by the linear size determines its energy product. The object of the study is a double-cantilever sample, and the subject of study is the energy product in the face element of the interaction layer. The external load of the cantilevers leads to their horizontal antisymmetric displacements, which form uniform shear deformations in the interaction layer. From the equilibrium conditions of the cantilevers in the variation form, taking into account the hypothesis of axial deformation homogeneity and their reduction, a system of differential equations is obtained, which relates the stress state in the layer and the cantilevers. The solution of the characteristic equation of the system is investigated for various ratios of layer thickness and cantilevers. It is shown that when the relationship is less than a certain value, depending on the Poisson's ratio, real roots take place. In the framework of the real roots of the characteristic equation, an analytical solution of the problem is obtained. Subject to the neglect of compression cantilevers found a simplified solution. The deformations in the layer are determined taking into account the compression of the consoles and without it. The analysis of the dependence of the energy product on the relationship of the thickness of the layer and cantilevers. It is shown that with a thickness ratio of 10-6 or less, the energy product practically does not change its value. Accounting for the compression of cantilevers gives a difference in the values of the energy product of the order of 20 % in relation to the simplified solution of the problem.
Boundary value problems for systems of inhomogeneous polyharmonic equations with applications in the theory of thin shells and plates
Authors: Mikishanina E A
Published: January 2020

A number of problems in the theory of elasticity, the theory of heterogeneous media, the theory of thin shells and plates is reduced to solving boundary value problems for systems of inhomogeneous polyharmonic equations. The paper proposes a numerical algorithm for solving systems of polyharmonic equations of the form in single-connected and multi-connected areas with a piecewise smooth contour with specified boundary conditions. Two cases are considered when the function is a known polyharmonic function and when the function is also the desired polyharmonic function. The boundary conditions can have the form similar to Dirichlet conditions, Neiman conditions, and can have a mixed form when on one part of the boundary conditions of the Dirichlet type are given, and on the other - hand, the conditions of the Neiman type. On the basis of multiple applications of the Laplace operator and the boundary element method, which is based on the green integral identity, the given system is reduced to a system of integral identities. After approximating the boundary by an inscribed n-gon and discretizing the system of integral identities, the latter is reduced to a system of linear algebraic equations, which is conveniently represented as a system of matrix equations. The existence and uniqueness of the solution follows from the existence of a unique solution of a system of linear algebraic equations. Special attention is paid to the application of the algorithm to the solution of problems on the bending of thin plates, and the bending load can be a known function, and can be an unknown polyharmonic function of an arbitrary order with given boundary conditions. The problem of bending a thin plate of elliptic shape with a known load on the surface is solved, as well as the problem of bending a thin square plate with an unknown load, which is the solution of a harmonic equation with given boundary conditions. The level lines are constructed and the forms of curved plates are given.
Experimental analysis of the effect of discrete aggregate on the bending stability of thin-walled cylindrical shells
Authors: Petrov M V
Published: January 2020

The effect of a discrete aggregate on the bending stability of thin-walled cylindrical shells was studied. The samples for the study were made of aluminum alloy 3004 (temper H19). The samples were cantilevered; a vertical concentrated cross force was applied to its free end. Ten empty samples and ten samples 90% filled with iron powder were tested. The samples were loaded in stages by 10N, and when approaching the moment of buckling the samples were loaded by 1N or less. The force, deflection of the free end of the sample, and axial strain were recorded at each stage of loading. Displacement of the free end of the sample versus cross force diagrams is plotted. The buckling force was determined by the inflection point of the diagrams. The samples lost the stability in elasticity. The diagrams for the empty and filled samples for each series almost coincide until the loss of stability of the empty sample. This means that when the empty sample loses its stability, the buckle directed towards the center line is formed; and for the filled samples, the formation of buckles is prevented by the discrete material, therefore the critical force increased by 18.8%. The influence of discrete aggregate is considered on the basis of approximation [24] for tank trucks manufactured at the enterprise. The critical stress is calculated using the superposition principle, since the stability is lost in the elasticity. The critical stress for the filled tank is determined by the sum of the critical stress for an empty shell with the stresses created by the weight load and the hydrostatic pressure of the discrete filler. The calculation of critical stresses showed that for the pattern samples the influence of discrete filler is 8.3%, and for the full-sized tanks the influence of discrete filler on the value of the critical voltage is significant and amounts to 62%. We studied the effect of various discrete fillers on stability, such as river sand, iron and copper powders at different filling ratios of the samples. Due to an increase in powder density and filling volume, the value of the critical force increased. For the samples filled to 90% with the river sand had the critical force increase by 13.3%, while those filled with the iron powder had their critical force increase by 40.5%, the copper powder samples had an increase of the critical force by 43.1%.
Identification of crack-like defect and investigation of stress concentration in coated bar
Authors: Sobol B V , Soloviev A N , Rashidova E V , Vasiliev P V
Published: January 2020

The first part of this work is devoted to the location of defects in a coated bar and the identification of their geometrical parameters. Using the methods of finite element modeling, ultrasonic non-destructive testing and machine learning technologies (artificial neural networks), the inverse problem of mechanics has been solved. A finite element model of ultrasonic wave propagation in a bar with a coating and an internal defect is constructed. Compared with previous works, the model used PML (Perfectly Matched Layer) structures, which suppress multiple reflections of the probe ultrasound pulse inside the bar and prevent signal noise. Based on the conducted numerical calculations of the finite element model, a data set was constructed. It contains the geometrical parameters of the defect and the corresponding amplitude-time characteristic of the ultrasonic signal. The architecture of a direct propagation neural network has been developed. The neural network was trained on the basis of previously processed data. As a result, on the basis of ultrasound data obtained from the outer surface of the bar, it is possible to restore the values of such defect parameters as depth, length and thickness. At the second stage, analytical-numerical technology for studying the stress intensity factor (SIF) at the crack tip is described using the example of the problem of a longitudinal internal crack of finite length located in an elastic strip reinforced with a thin flexible coating. The solution to this problem is based on the method of integral transformations, which made it possible to reduce it to a singular integral equation of the first kind with a Cauchy kernel, which is solved by the collocation method in the form of expansion in Chebyshev polynomials with a factor that explicitly takes into account a feature in the vicinity of the crack vertices. The latter allows you to directly find the SIF and evaluate the effect on it of various combinations of geometric and physical parameters of the problem.
Elastoplastic interaction of grains in polycrystalline materials
Authors: Tashkinov A A , Shavshukov V E
Published: January 2020

A new method is developed for solving boundary value problems of elastoplastic deformation of polycrystalline materials based on the field-theoretical approach. The boundary value problem for inhomogeneous global strain fields in differential form is transformed into a system of integral equations for mesostrain tensors in grains. In this approach, strain at any point of any grain represented as a superposition of homogeneous macrostrain and contributions of interactions with strain in given grain and all another grains of polycrystalline body . It is shown that the effects of the interaction of strains in polycrystal grains can be described using tensors of the fourth rank. This tensor has 36 independent components. The interactions are additive in nature, that drastically simplifies the solution of some problems, for example, search for extreme microstructures of a polycrystal in which critical localized phenomena arise, such as nucleation of the first plastic slips occur. Constitutive equations of deformation type are used for whole body and separate grains. A model of elastoplastic deformation of single crystals of grains is constructed. The physical mechanisms of plastic deformation are shifts in slip systems of crystals. General expressions are obtained for calculating the secant modules of single crystals for any multiaxial deformation. To solve systems of integral equations for mesostrains in grains the perturbation theory upon intergrains interaction used. Nonlinear systems of equations for plastic strains are solved by the iteration method. The features of the elastoplastic interaction of grains are theoretically investigated. The intensity of the elastoplastic interaction depends on the deformed state of the grains. For two identical grains, the elastoplastic interaction of the pair is several times more intense than the elastic one. In this case, the effect of plastically deformed grain on elastically deformed grain is much higher than the inverse effect. An increase in the intensity of interaction with the development of plastic deformations leads to the effect of homogenization of mesodeformations. Computational experiments were performed using polycrystalline titanium as an example.
Tuổi đồng vị phóng xạ và tiến hóa nhiệt kiến tạo các đá Ophiolit đới biến dạng Sông Mã
Authors: Vượng Nguyễn Văn , Chương Mai Hồng , Thắng Tạ Trọng
Published: January 2020

Multiradioactive ages and thermo-tecnonic evolution of the ophiolitic rocks along Song Ma deformation zone
Vùng tai biến trượt lở khu vực Mường Lay
Authors: Dũng Nguyễn Chí , Nghinh Lê Thị , Pha Phan Đông , Lâm Doãn Đình , Hưng Nguyễn Quang , Hương Nguyễn Thị Thanh
Published: January 2020

The landslide hazard's zoning in Muong Lay
Conservative valuation of typical volcanic landscapes in the Pleiku basaltic plateau: some improvement
Authors: Tuan Nguyen Thanh , Chi Tran Thuy , Khanh Uong Dinh , Kioko John Muasya
Published: January 2020

There are tens of typical volcano-related relics such as craters and waterfalls in the Pleiku volcanic plateau, Gia Lai province however, Gia Lai’s tourism has underdeveloped. Thus it is vital finding the specific tourist products to promote the provincial nonsmoking industry. Quantifying conservative values of typical volcanic landscapes in the form of money would provide useful information for decision-makers to plan and develop rural tourism. This study was applied to the contingent valuation method to estimate the conservative values of twenty volcanic landscapes in the Pleiku plateau. The results indicated that Bien Ho volcanic landscape got the highest traditional value with above 38.60 billion VND. Subsequently, the conservative value of Chu Dang Ya was 27.28 billion VND. The value of the Phu Cuong waterfall was also estimated quite highly. Furthermore, our new finding is that there was a close relationship between the results coming from the conservative valuation and the results coming from evaluation, classification of geoheritages based on UNESCO’s criteria adapting in Vietnam. The study figured out that there was a close relationship between the conservative valuation and information accessibility on twenty landscapes by interviewees before.
Modeling effects of abiotic and anthropogenic factors to rice production - A case study in Sapa district, Lao Cai province, Vietnam
Authors: Bac Dang Kinh , Burkhard Benjamin
Published: January 2020

The famous terraced rice ecosystem in the mountainous areas as Sapa of northern Vietnam has expanded with unstable productivity over generations. However, the question arises of how natural and human conditions on terraces can boost the quality of rice provisioning ecosystem service supply with rice yields as an indicator. The study used a semi-structured interview method, the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) tool and general linear models to investigate the influence of natural and human-derived components on the rice provisioning service at six villages. The results showed that along with the importance of applying a fertilizer-based system in the terraced rice ecosystem, topology- and hydrology-based systems have been influencing significantly on water and nutrient supply for irrigation on terraced rice fields. Moreover, analyzing the natural components has been considered more efficient than human-derived components for a sustainable rice ecosystem. The results indicated that the high potential of rice provisioning service supply had found at the downstream of Ta Van sub-catchment and the Vu Lung Sung village where the distance from paddy fields to sinks or outlet of streams is lower than five kilometers. The last result of the synthetic model proving 74.28 percent of deviance of terraced rice production did not avoid many noises in collecting and standardizing data that also discuss in this study.
Chemical compositions of amphiboles and their references to formation conditions of granitoids from Nam Rom and Song Ma massifs, Northwest Vietnam
Authors: Can Pham Ngoc , Anh Tran Tuan , Hoa Tran Trong , Ly Vu Hoang , Lien Pham Thi Phuong , Huong Ngo Thi
Published: January 2020

In this paper, the mineralogical and geochemical characteristics of amphiboles and plagioclases of granitoids from the Nam Rom and Song Ma massifs have been investigated to understand their formation conditions. The Nam Rom amphibole and plagioclase are subhedral to euhedral fine- to medium-grained crystals. Whereas, the Song Ma amphibole and plagioclase are anhedral to subhedral fine-grained crystals. Geochemical compositions of amphiboles suggest that Nam Rom and Song Ma amphiboles are edenite and ferro-edenite, respectively. Nam Rom edenite has higher contents of basic constituents (Mg and Ca) and lower contents of felsic constituents (Na and K) compared with the Song Ma ferro-edenite. On the other hand, Si-(Na+K) and Si-Ca apfu ratios of the Nam Rom edenite and the Song Ma ferro-edenite and Al/(Na+K)-Al/(Ca+Na+K) atom per formula unit (apfu) ratios of the Nam Rom edenite and andesine and the Song Ma ferro-edenite, andesine and oligoclase are similar. Formation conditions of the Nam Rom and Song Ma granitoids were calculated using amphibole-plagioclase geobarometer. The Nam Rom granitoid was formed at 3.07-5.32 kbar (10.1-17.6 km under paleo-surface) and 750-785°C. The Song Ma granitoid was formed at 1.04-3.08 kbar (3.4-10.2 km under paleo-surface) and 715-745°C. Therefore, Nam Rom and Song Ma granitoids are thought to be crystallized from the same magma. The former was formed from the immature and more basic stage of magma; the latter was formed from the mature and more felsic stage of magma.
Revisión sistemática del concepto de laboratorios vivos
Authors: Bravo Ibarra Edna Rocío
Published: January 2020

Los laboratorios vivos son espacios que agrupan la investigación, el análisis y la experimentación para lograr respuestas a problemáticas sociales, empresariales, tecnológicas y ambientales. Para esto, se realizó una revisión sistemática de la literatura existente del concepto: origen de este, características, contextos más importantes y establecer cómo se relaciona con la innovación. Se revisaron documentos científicos a partir de la literatura académica disponible de los diferentes enfoques teóricos y se concluyó que con el análisis del concepto teórico se puede comprender a esta herramienta metodológica en su aporte a los procesos de innovación.
Propuesta para la definición de la arquitectura empresarial
Authors: González Campo Carlos Hernán , Lozano Oviedo Jonathan
Published: January 2020

La Arquitectura Empresarial (AE) es uno de los elementos que más importancia está tomando dentro de las organizaciones, al considerarlo un mecanismo estratégico que impulsa a las empresas a lograr los objetivos estratégicos propuestos por la alta gerencia, mediante la alineación de la estrategia empresarial con sus componentes organizacionales básicos: personas, procesos, tecnología y aplicaciones. En el presente artículo se realiza una investigación acerca de la AE, presentando su definición, el Estado del Arte, componentes, metodologías, herramientas de la AE, los marcos de referencia, entre otros; siendo la metodología utilizada la que se basa en el análisis documental y revisión de la literatura, como técnica de estudio. Finalmente, se establece una propuesta de definición de la AE considerando lo investigado en la literatura, y se presentan algunas conclusiones relevantes del estudio.
Planeamiento Estratégico Prospectivo: Métodos MACTOR y SMIC
Authors: Hernández Cristian
Published: January 2020

Los autores, Quintero y Hamann, plasman su amplio conocimiento sobre planeación y prospectiva estratégica a lo largo del texto. Asimismo, en esta obra resalta la experiencia en docencia universitaria en el campo amplio de la administración, puesto que el libro parte de una premisa pedagógica y tiene un alto valor lúdico. En cuanto a su composición, consta de cinco capítulos. En éstos, se presenta un marco referencial, el instructivo de aplicación de los métodos MACTOR y SMIC, el modelamiento de macroentornos y de organizaciones individualizadas, el proceso de análisis prospectivo en espectros sociales u organizacionales y la implementación del análisis prospectivo como plan de negocios de una empresa. Además, se adjunta un anexo con 19 formatos para elaborar herramientas de recolección de datos que faciliten la consecución de un estudio fundamentado en la escuela francesa de prospectiva.
Tutorial options for clinicians undertaking postgraduate degrees online
Authors: Noguchi Naomi , Stanaway Fiona Fern
Published: January 2020

This article was migrated. The article was marked as recommended. Purpose: To determine clinicians' preference for types of tutorial participation and their subsequent tutorial participation and performance. Methods: Part-time online students undertaking an introductory postgraduate unit of study in clinical epidemiology were offered different tutorial options across semesters. Results: Ungraded asynchronous online discussions were poorly attended with only 118/186 (63%) posting at least once across 10 tutorials. Allocating a 1% participation mark each week and allowing students to complete tutorial tasks individually increased participation with 148/190 (78%) completing at least 8 out of 10 tutorials. Moreover, the final assignment mark distribution lost the tail of poorly performing students. In semesters when two tutorial options were offered, 192/200 (96%) chose to work alone over asynchronous online discussion and 162/190 (85%) chose to work alone over intensive face-to-face workshops. Even when students self-selected to join graded asynchronous online discussion, only 2/8 (25%) completed at least 8 out of 10 tutorials. In students who selected to attend intensive workshops, both participation and final assignment grade were better than that observed in other students. Conclusions: The majority of clinicians studying online chose to work individually. Allowing students to work alone and awarding participation marks appeared to improve both participation and knowledge attainment.