bluuebunny/crossref_metadata_2025 huggingface dataset:
Research? Learning? Exploring? Individual Knowledge Acquisition
Authors: Bence-Fekete Andrea
Published: April 2019

The development and modification of learning skills did not follow the boom of the other areas. In the teaching materials verbal knowledge is still the most significant, which does not require thinking and creativity from the students during acquisition; what more, sometimes even the pedagogues do not like those students, who apply unique problem-solving strategies. Making the knowledge applicable does not happen via passive reception, but rather via active learning based on individual thinking and experiences. Research based knowledge acquisition may be applied already from the age of 10; and it enables an prepares children to get along creatively in our knowledge-based society, which requires the individual search and use of information and sources, sensitivity towards problems and a general knowledge of research methods. During the lecture I will introduce the working group of young researchers, where children learn the basics of research step-by-step and show how the roles of students and teachers change during the individual discoveries. So-called “Dunántúli Mandulafa” is a scientific competition of 10-19-year-old young researchers, where they show their first ever presentation and make their first scientific publication - considering the abilities originating from their age, certainly.
The Subject “Physical Education and Sport” in the Higher Schools in Bulgaria
Authors: Miletiev Stefan
Published: April 2019

The purpose of this report is to present briefly some problems about the physical education and sport in higher education institutions in Bulgaria, results of a survey with students from Sofia University “St. Kl. Ohridski”, as well as trends in the activities within the subject “Physical education and sport”. Emphasis is placed on the inclusion of the fitness within the types of sport offered to students; the present state of the system of fitness training in the higher school is being studied.
Professional Development in Higher Education
Authors: Fenyő Imre
Published: April 2019

The University of Debrecen is a participant of the PETRA project (Promoting Excellence in Teaching and Learning in Azerbaijani Universities) with the University of Jyvaskyla, Finland, University of Applied Sciences Vienna, Austria, Polytechnic University of Valencia, Spain. The aim of the project is promoting of teaching and learning excellence in Azerbaijan Universities, by supporting the professional development in higher education and, in the academic community. For this reason, the program wants to enhance the usage of technology and innovative forms of teaching, to provide support for designing courses and for choosing and using diverse approaches in assessment. The purpose of this study is to identify the possibilities of promoting the professional development in higher education and to explore the theoretical landscape: the roles and implications of the professional development. This paper explores the connections between the reflective behaviour of the teachers and their assessment methods and wants to provide new approaches to assessment in the context of the institutional strategies of the higher education. This paper argues for innovative forms of assessment such as the portfolios in teacher preparation or the group-based assessment forms - as methods of promoting higher quality learning. The study investigates the ways towards the autonomous assessment in the higher education, using self-assessment and peer assessment.
Mesenchymal stem cells transplantation reduces diabetic nephropathy
Authors: Kazmi Abeer , Kazmi Arsheema , Muhammad Wali , Azhar Muhammad
Published: April 2019

Diabetes mellitus is a metabolic disease in which the pancreas is unable to produce enough insulin due to the destruction of b -cells or the body does not utilize insulin properly. Continuous fluctuation of blood glucose levels is responsible for prolonged complications such as diabetic nephropathy (DN), diabetic retinopathy, or diabetic cardiomyopathy. Approximately, 20-30% of all diabetic patients face DN, which causes the formation of diabetic glomerular lesions and reduced glomerular filtration rate. In the case of renal failure, kidney transplantation is the only available therapy, however, it is expensive and almost unattainable due to unavailability of donors and host immune rejection. Stem cells are an alternative and attractive source of therapy because of their proliferative nature and the ability to produce distinct specialized cells. Mesenchymal stem cells (MSCs), which are derived from bone marrow, possess an anti-inflammatory property and the ability of selfrenewal and differentiation into a variety of specialized cells. MSCs are widely used to treat different diseases including DN and they have shown encouraging outcomes. This review provides details about the regenerative efficiency of using MSCs in treating diabetic nephropathy.
PICU Early Mobilization and Impact on Parent Stress
Authors: Colwell Blair R.L. , Olufs Erin , Zuckerman Katharine , Kelly Serena P. , Ibsen Laura M. , Williams Cydni N.
Published: April 2019

BACKGROUND AND OBJECTIVES:

Early mobilization of critically ill children may improve outcomes, but parent refusal of mobilization therapies is an identified barrier. We aimed to evaluate parent stress related to mobilization therapy in the PICU.

METHODS:

We conducted a cross-sectional survey to measure parent stress and a retrospective chart review of child characteristics. Parents or legal guardians of children admitted for ≥1 night to an academic, tertiary-care PICU who were proficient in English or Spanish were surveyed. Parents were excluded if their child’s death was imminent, child abuse or neglect was suspected, or there was a contraindication to child mobilization.

RESULTS:

We studied 120 parent-child dyads. Parent mobilization stress was correlated with parent PICU-related stress (rs [119] = 0.489; P ≤ .001) and overall parent stress (rs [110] = 0.272; P = .004). Increased parent mobilization stress was associated with higher levels of parent education, a lower baseline child functional status, more strenuous mobilization activities, and mobilization therapies being conducted by individuals other than the children’s nurses (all P < .05). Parents reported mobilization stress from medical equipment (79%), subjective pain and fragility concerns (75%), and perceived dyspnea (24%). Parent-reported positive aspects of mobilization were clinical improvement of the child (70%), parent participation in care (46%), and increased alertness (38%).

CONCLUSIONS:

Parent mobilization stress was correlated with other measures of parent stress and was associated with child-, parent-, and therapy-related factors. Parents identified positive and stressful aspects of mobilization therapy that can guide clinical care and educational interventions aimed at reducing parent stress and improving the implementation of mobilization therapies.
Epidemiology of Readmissions After Sepsis Hospitalization in Children
Authors: Prout Andrew J. , Talisa Victor B. , Carcillo Joseph A. , Angus Derek C. , Chang Chung-Chou H. , Yende Sachin
Published: April 2019

BACKGROUND AND OBJECTIVES:

The decline in hospital mortality in children hospitalized with sepsis has increased the number of survivors. These survivors are at risk for adverse long-term outcomes, including readmission and recurrent or unresolved infections. We described the epidemiology of 90-day readmissions after sepsis hospitalization in children. We tested the hypothesis that a sepsis hospitalization increases odds of 90-day readmissions.

METHODS:

Retrospective cohort analysis of the Nationwide Readmissions Database. We included index unplanned admissions of non-neonatal pediatric patients and described the proportion of readmissions, including those involving infection or sepsis. We performed multivariable analysis to determine the odds of readmission after a sepsis and nonsepsis admission and compared costs of readmission after sepsis and nonsepsis admissions.

RESULTS:

Of 562 817 pediatric admissions, 7634 (1.4%) and 555 183 (98.6%) were discharged alive after admissions with and without sepsis. The rate of 90-day readmission after sepsis was 21.4%: 7.2% and 25.5% in previously healthy and chronically ill patients. The adjusted mean cost during readmission was $7385. Half of readmissions (52.9%) involved recurrent infection or sepsis. Sepsis admissions were associated with higher odds of readmission at 90 days compared with nonsepsis admissions (adjusted odds ratio 1.15, 95% confidence interval 1.08–1.23). The results remained unchanged for 30-day and 6-month readmissions.

CONCLUSIONS:

Readmissions occur after 1 in 5 pediatric sepsis hospitalizations and increase health care costs. Sepsis hospitalization increased odds of readmission and commonly involved recurrent infection or sepsis. Clinicians caring for these patients should consider surveillance for recurrent or unresolved infection, and researchers should explore underlying mechanisms and potential interventions to reduce readmissions.
Readmissions to the ICU Among Children With Tracheostomies Placed After Cardiac Arrest
Authors: Heneghan Julia A. , Shein Steven L.
Published: April 2019

OBJECTIVE:

Describe clinical outcomes and risk factors for ICU readmissions in a cohort of children who underwent tracheostomy placement after cardiac arrest.

METHODS:

A retrospective, multicenter cohort analysis of children <18 years old admitted to a Virtual Pediatric Systems, LLC–participating PICU from January 2009 to December 2016 and underwent tracheostomy after cardiac arrest.

RESULTS:

Among 394 index admissions, the median age was 16.8 months (interquartile range [IQR] 5.3–89.3), and Pediatric Risk of Mortality 3 scores (median 9 [IQR 4.75–16]) indicated severe illness. Baseline neurologic function was generally age appropriate (Pediatric Cerebral Performance Category score: median 2 [IQR 1–3]). The most common primary diagnosis categories were respiratory (31.0%), cardiac (21.6%), and injury and/or poisoning (18.3%). Post-tracheostomy mortality during the index admission was 9.3%. Among the 358 patients who survived to discharge, 334 had >180 days of available follow-up data. Two hundred and five (61.4%) patients were readmitted at least once for a total of 643 readmissions (range 0–30; median 1 [IQR 0–2]). We observed 0.54 readmissions per patient-year. The median time to first readmission was 50.3 days (IQR 12.8–173.7). Significant risk factors for readmission included a pre-existing diagnosis of chronic lung disease, congenital heart disease and/or heart failure, prematurity, and new seizures during the index admission. The most common indication for readmission was respiratory illness (46.2%). Mortality (3.3%) and procedural burden during readmission were consistent with general PICU care.

CONCLUSIONS:

ICU readmission among children who undergo postarrest tracheostomy is common, usually due to respiratory causes, and involves outcomes and resource use similar to other ICU admissions. Risk factors for readmission are largely nonmodifiable.
Prevention of Bronchopulmonary Dysplasia: A Summary of Evidence-Based Strategies
Authors: Jensen Erik A.
Published: April 2019

Bronchopulmonary dysplasia (BPD) is the most common chronic complication associated with extremely preterm birth. Although BPD is now an uncommon condition in infants born with birthweights higher than 1,500 g, among infants born at or near the current limits of viability, BPD rates have not improved over the past 2 to 3 decades and may be increasing. No single therapeutic intervention is effective at preventing BPD. As such, clinicians must use multiple evidence-based strategies to help reduce BPD rates. This review examines current evidence-based approaches to BPD prevention, primarily focusing on data obtained from randomized controlled trials.
Approaches to Noninvasive Respiratory Support in Preterm Infants: From CPAP to NAVA
Authors: Hussain Walid A. , Marks Jeremy D.
Published: April 2019

Endotracheal intubation and invasive mechanical ventilation have been mainstays in respiratory care of neonates with respiratory distress syndrome. Together with antenatal steroids and surfactant, this approach has accounted for significant reductions in neonatal mortality. However, with the increased survival of very low birthweight infants, the incidence of bronchopulmonary dysplasia (BPD), the primary respiratory morbidity of prematurity, has also increased. Arrest of alveolar growth and development and the abnormal development of the pulmonary vasculature after birth are the primary causes of BPD. However, invasive ventilation-associated lung inflammation and airway injury have long been believed to be important contributors. In fact, discontinuing invasive ventilation in favor of noninvasive respiratory support has been considered the single best approach that neonatologists can implement to reduce BPD. In this review, we present and discuss the mechanisms, efficacy, and long-term outcomes of the four main approaches to noninvasive respiratory support of the preterm infant currently in use: nasal continuous positive airway pressure, high-flow nasal cannula, nasal intermittent mandatory ventilation, and neurally adjusted ventilatory assist. We show that noninvasive ventilation can decrease rates of intubation and the need for invasive ventilation in preterm infants with respiratory distress syndrome. However, none of these noninvasive approaches decrease rates of BPD. Accordingly, noninvasive respiratory support should be considered for clinical goals other than the reduction of BPD.
Numerical comparisons of sandwich viscoelastic beam models1
Authors: Neme Felippe Waldir , Barbosa Flávio , Magluta Carlos , Roitman Ney , Borges Flávia
Published: April 2019

Composite structures with elastic layers and viscoelastic core have been used as a passive damping treatment applied to reduce vibration amplitudes. In the design phase of this type of damping technique, many aspects ranging from computer modeling to laboratory tests should be considered. Due to the frequency dependency of mechanical properties of these materials, time domain based models for viscoelastic materials are not as numerous as frequency domain based methods. Usually, time domain methods introduce extra dissipation coordinates or internal variables as Golla-Hughes-McTavish (GHM) method and also Anelastic Displacement Field (ADF) method. In this paper, these methods are evaluated by comparing theirs results to the ones obtained by means of theoretical analysis. Processing time are also evaluated highlighting advantages and disadvantages of these methodologies. Finally, these two time domain methods are applied to a real structure, pointing out the facilities and difficulties to simulate an actual situation.
Development of an easy-to-assemble external fixation system for bone transport
Authors: Casanova Garcia Fernando , Carrera Pinzon Andres , Leyton Arlex , Machado Caicedo Andres , GarcIa Alvarez Jose Jaime
Published: April 2019

We developed a monolateral external fixation system for bone elongation easier to assemble than commercial systems since the clamps can be laterally assembled to the rail in contrast to the commercial systems where the clamps can only be assembled from the ends. The system is formed by clamps, screws, and a rail. The rail is composed of two carbon fiber circular rods of ½” diameter and 42-cm length. The clamps can slide with respect to the rail to allow bone distraction or may be fixed to the rail by using a wedge and a screw. The prototype was mechanically evaluated under the ASTM F1541 standard. The stiffness in axial, Medio Lateral bending (ML), Antero Posterior bending (AP), and flexo-torsional load were 117 N/mm, 46 N/mm, 8.7 N/mm, and 5.8 N-mm/°, respectively, which are on the range of stiffness of commercial systems.
Cotas para el problema de asignación de vehículos
Authors: Alvarez Cruz Cesar Dario , Morabito Reinaldo , Munari Pedro
Published: April 2019

El problema de asignación dinámica de vehículos consiste en asignar una flota de vehículos para atender la demanda prevista por transporte de carga entre terminales, durante un horizonte de tiempo finito y con múltiples periodos, cuyo objetivo es maximizar el lucro generado por los servicios completados. Dada la dispersión geográfica por demanda de servicios de transporte de carga, es común que se acumulen vehículos vacíos en lugares donde no son necesarios o se genere una escasez de vehículos donde son necesitados a lo largo del horizonte de planeación, por tanto, es importante balancear el suministro de vehículos y la demanda por servicios a lo largo del horizonte de planeación. El tamaño de los problemas prácticos enfrentados por transportadores logísticos es considerablemente grande para resolver en tiempos computacionales razonables, especialmente en transporte de carga por carre-tera. Consecuentemente, se recurre a métodos heurísticos para obtener soluciones factibles, pese a que no se tiene certificado de calidad de la solución. Por esta razón, en este trabajo se propone estudiar dos métodos de decomposición, que proporcionan certificados de calidad, para obtener cotas para el PADV. Los métodos utilizados son relajación lagranjeana junto con método de subgradiente de optimización y decomposición de Dantzig-Wolfe junto con generación de columnas. Experimentos compu-tacionales son realizados con instancias realistas, y los resultados de las cotas se muestran promisorios en términos de eficiencia computacional para el segundo método.
Use of failure data and criticality analysis in a maintenance management tool for electric power distribution company
Authors: Nunes Anderson S , Andrade Jairo J O
Published: April 2019

Electric power distribution companies are facing a delicate moment. Privatizations, scarce resources, few investments and harsh penalties due to lack of quality force these companies to seek greater efficiency and control of their processes. Thus, making decisions based only on tacit knowledge and without a clear procedure, like the maintenance company that was part of this study, is not advisable. For this reason, this work aimed to develop a support tool for maintenance decisions, based on failure data and criticality analysis. The FMEA (Failure Mode and Effect Analysis) method was used to discover the riskiest failure modes, and the MAUT (Multi-Attribute Utility Theory) and the Mudge method were used to rank the main criteria used by experts when deciding which transmission line (TL) is in a more critical condition. As a result, the study proposed a tool that guides decision-making in a systematized, impersonal and collective knowledge-based manner for the specific situations encountered in TL maintenance. The results were approved and judged satisfactory by the members of a team of specialists from the maintenance sector.
Mechanism of glycerol dehydration and dehydrogenation: an experimental and computational correlation
Authors: Sanchez Astrid , Velasquez Mauricio , Batiot-Dupeyrat Catherine , Espinal Juan F. , Santamaría Alexander
Published: April 2019

Experimental formation of hydroxyacetone (HA) from glycerol over La2CuO4 catalyst under mild experimental conditions (533 K, N2 atmosphere) was correlated with molecular modeling results with the aim to propose reaction pathways. Based on these results, a novel mechanism in terms of elementary reactions is proposed for gaseous phase process. The results suggest that there are two main routes that contribute to HA formation. The main and more feasible reaction pathway corresponds to the direct 1,2-dehydration of glycerol. The second pathway involves the dehydrogenation of glycerol to produce glyceraldehyde, which is then dehydrated toward HA through the formation of a six-membered cyclic transition state during the hydrogenation step. Finally, the pyruvaldehyde formation pathway was found to be a parallel reaction to the HA formation which could be displaced by tuning the reaction conditions. HA formation as a result of pyruvaldehyde hydrogenation was also proposed, but it was found to be a less important route.
Evaluating gelling-agent mixtures as potential substitutes for bacteriological agar: an approach by mixture design
Authors: Sanchez Cardozo John Alexander , Ruiz Pardo Ruth Yolanda , Quintanilla Carvajal Maria Ximena , Acosta Gonzalez Luis Alejandro
Published: April 2019

Gelling agents are components to solidify media cultures facilitating the isolation of microorganisms in pure cultures. Agar is the most used gelling agent in microbiological field because of properties like gelling temperature and a desirable texture (high firmness and low adhesiveness). A current problem with agar manufacture is that overexploitation of the algae Gelidium spp is affecting the species conservation and has increased agar’s market price by up to 300%. The aim of this research was to propose substitutes of bacteriological agar in terms of texture by using some reported gelling agents used by food and agroindustry. To determine the effects of the components on texture, were proposed a mixture-design screening to establish an optimal mixture that replace agar. The optimal result, according to the desirability function, were composed of arabic gum (2%), gelan gum (0.5%) and carrageenan (0.5%). This mixture exceeds the firmness of the reference matrix (agar at 2%) by 15% and is potentially 25% more cheaper and without significative statistical difference in growth CFU when compared to agar based media
Cassava starches modified by enzymatic biocatalysis: effect of reaction time and drying method
Authors: Figueroa Florez Jorge Antonio , Cadena Chamorro Edith Marleny , Rodriguez Sandoval Eduardo , Salcedo Mendoza Jairo Guadalupe , Ciro Velasquez Héctor José
Published: April 2019

Currently, comes up the need to develop and produce modified starches that allow enhancing their applicability as additives in food industry. In this, the effect of biocatalysis time and type of drying (forced convection and vacuum drying) on the morphological, structural and pasting properties of enzymatically modified cassava starch granules was evaluated. The application of amyloglucosidase generated a degree of hydrolysis ranging between 35.87 and 41.02% equivalents of dextrose (ED), in addition, it caused significant changes in starch granules morphology. At structural level, modified starch reveals substantial changes with respect to control, where FT-IR spectra show the displacement of absorption bands by tension or bending in the region between 900 and 1100 cm-1 due to the breakdown of α-D-glucosidic bonds α-D-(1,4) or α-D-(1,6), increasing swelling, absorption and solubility in water properties. Likewise, significant changes are reported in pasting properties together with an increase in stability in techno-functional properties of hydrolyzed starches dried in vacuum.
The effect of changes in vegetation cover on the hydrological response of the sub-basin Los Pozos
Authors: Caro Camargo Carlos Andrés , Velandia Tarazona Jenny Esmeralda
Published: April 2019

In the current study the SWAT hydrological simulation model was implemented in the sub basin Los Pozos, located in the Aquitania municipality, department of Boyacá, Colombia, in order to quantify the effect caused by changes from plant cover in the hydrological response. The affordmentioned was evaluated in recovery scenarios, which were formulated taking into account the territory planning instruments, and scenarios the agricultural expansion frontiers. The model was manually calibrated and validated to improve its prediction capacity by means of the coefficient of R2 determination, the Nash-Sutcliffe efficiency index and percentage bias (Percent Bias-PBIAS), making the sensitivity analysis previously, which facilitated the calibration process. Once the model hydrologically represented the subbasin the scenarios were created, allowing identifying the handling in terms of plant cover that can be implemented to favor water regulation.
Initial study of Eucalyptus Wood Ash (EWA) as a mineral admixture in concrete
Authors: Couto Álisson Franco do , Nogueira Geovana Souza Ferreira , Sandoval Gersson Fernando Barreto , Schwantes-Cezario Nicole , Morales Gilson
Published: April 2019

This study evaluated the possibility of using in natura Eucalyptus Wood Ash (EWA) from aviary furnaces as a mineral admixture in concrete. The ash was 100 mesh-sieved and added to the mix in 5, 10, 15 and 20% of the cement bulk. Physical analysis unveiled that EWA has a specific gravity higher than other organic originated residues, whereas its BET specific surface area is not enough to enhance its filler and/or pozzolanic effects. Chemically, the residue presented a low organic matter rate and a SAI below the minimum required by the Brazilian standards. EWA interfered in the times of cement set, increasing them, while FTIR unveiled mainly the presence of calcium carbonate bonds. The admixture compromised the concretes mechanical performance, leading to the conclusion that the sieving procedure of EWA alone is not enough do admit its usage as a mineral admixture.
Turismo y calidad de vida: un estudio de autocorrelación espacial aplicado a la ciudad de Mar del Plata, provincia de Buenos Aires, Argentina
Authors: Gordziejczuk Matías Adrián , Lucero Patricia Iris
Published: April 2019

Los análisis basados en autocorrelación espacial permiten conocer el grado de agrupamiento, dispersión o aleatoriedad entre unidades espaciales vecinas, pudiéndose aplicar en escenarios univariado y bivariado. En este artículo se indaga la existencia de autocorrelación espacial bivariada entre indicadores de turismo y calidad de vida, así como el grado de autocorrelación de cada variable. Las unidades espaciales de análisis son las 76 fracciones censales de Mar del Plata. Los indicadores utilizados son las pernoctaciones hoteleras anuales, la cantidad de viviendas de presunto uso turístico, y un índice de calidad de vida compuesto por cuatro dimensiones y ocho indicadores obtenidos a partir del censo de población argentino del 2010. Los resultados de la investigación muestran la configuración de dos zonas de autocorrelación espacial positiva dentro de la ciudad, lo que valida el supuesto de que existe una relación entre la existencia de equipamientos turísticos y una más alta calidad de vida de los residentes de las zonas dedicadas al turismo.Ideas destacadas: artículo de investigación que explora la relación entre los indicadores de turismo y la calidad de vida, a partir del método de autocorrelación espacial univariada y bivariada aplicado al caso de la ciudad de Mar del Plata, Argentina.
Análisis de fragmentación y conectividad del bosque en la subcuenca del río Tapezco, Costa Rica: Conectando el bosque para proteger el agua
Authors: León-Alfaro Yazmín
Published: April 2019

Las zonas rurales están expuestas a procesos de fragmentación de bosques debido al desarrollo de actividades agropecuarias ambientalmente no sostenibles. Ante esta situación, surge el interés de estudiar la fragmentación y conectividad del bosque en una subcuenca agropecuaria en el noroeste del Valle Central de Costa Rica. Se propone, mediante el uso de aplicaciones SIG, una red de conectividad basada en enlaces de vegetación a partir de la red de drenaje. Se encontró que la fragmentación en la subcuenca es diferencial, en virtud de la distribución e intensidad de los usos de la tierra. Así, las partes altas presentan mayor cobertura y continuidad del bosque, mientras que en las zonas bajas la vegetación remanente se localiza casi exclusivamente en los márgenes de los ríos. Los usos que generan mayor fragmentación son principalmente los cultivos hortícolas, seguidos de los pastos, pastos con árboles dispersos y, en menor grado, los usos urbanos localizados generalmente a lo largo de las vías de comunicación.Ideas destacadas: artículo de investigación donde se analiza la fragmentación y conectividad del bosque en una subcuenca agropecuaria, mediante aplicaciones sig, para la propuesta de enlaces de vegetación con la red de drenaje como eje principal.
Uso de la técnica Rompecabezas para promover la habilidad de resolución de problemas y el trabajo colaborativo en tareas de expresión oral en inglés
Authors: Quiroga Castillo Cecilia , Sepúlveda Navarro Karin , Díaz Larenas Claudio
Published: April 2019

El presente artículo describe un estudio cuyo objetivo fue implementar la Técnica de aprendizaje Rompecabezas para desarrollar las habilidades cognitivas de orden superior de resolución de problemas y la habilidad colaborativa en 31 estudiantes de sexto año de educación primaria en la asignatura de inglés. Los aprendices realizaron tareas de expresión oral en inglés en grupos pequeños por dos horas semanales durante siete semanas para la unidad didáctica “En la Ciudad”; a cada uno de los participantes se les invitó a comprometerse e interactuar colaborativamente para lograr la solución de las tareas. La recolección de datos se obtuvo de la aplicación de las mediciones de diagnóstico y de término para los Grupos Rompecabezas, ambas evaluadas mediante una rúbrica analítica de resolución de problemas y una escala de estimación para el trabajo colaborativo. Se concluyó la experiencia con la realización de una encuesta de satisfacción de la Técnica Rompecabezas dirigida a los participantes. Al final, los estudiantes desarrollaron progresivamente la habilidad de resolución de problemas, que demostró, asimismo, mejoras en el trabajo colaborativo.

Palabras clave: Técnica Rompecabezas, habilidades del pensamiento de orden superior, resolución de problemas, trabajo colaborativo, expresión oral.
Sobre la noción de escritura en las enseñanzas de Lacan
Authors: Savio Karina
Published: April 2019

En este artículo se propone un recorrido por la noción de escritura en las enseñanzas de Jacques Lacan con el fin de identificar el sentido o los sentidos que se alojan en ella. Asimismo, se pretende analizar con qué elementos teóricos se articula, y rescatar su aporte para los estudios del lenguaje. Entre los conceptos que provienen del campo de los estudios del lenguaje, esta noción no ha sido objeto, hasta el momento, de un estudio detallado. Sin embargo, este término persiste  a lo largo de los escritos y los seminarios del psicoanalista. Como resultado de este trabajo se ha  podido identificar cierta continuidad, pero también ruptura, en los modos en que Lacan concibe la escritura. Mientras que en una primera instancia la escritura es definida como una marca distintiva, lo que le supone un parentesco con el significante, en un segundo momento es entendida como sostén de goce. Podría pensarse que este segundo sentido conlleva la idea de marca; sin embargo, es una marca que ha perdido su valor “distintivo”, que no está ya en línea con el significante, sino que está definida desde el registro real.

Palabras clave: Estudios del lenguaje, psicoanálisis, real, escuela francesa, significante.
Effect of rations with fresh leaves of Gmelina arborea on some reproductive parameters of rabbit bucks
Authors: Pius O. , Ahemen T. , Abu A.H.
Published: April 2019

Abstract. Thirty (30) rabbit bucks of mixed breeds (New Zealand white x Chinchilla) with average live weight of 852g, aged between 12 and 14 weeks were subjected to a feeding trial for 14 weeks, to determine the effects of diets with different ratio concentrate to fresh leaves of Gmelina arborea (FLGA) on semen characteristics, testicular and epididymal morphometry of rabbit bucks. The rabbits were randomly allocated into five treatments: Treatment 1-T1 (100g concentrate /C/: 0g FLGA), Treatment 2-T2 (75g C: 25g FLGA), Treatment-T3 3 (50g C: 50g FLGA), Treatment 4-T4 (25g C: 75g FLGA), Treatment 5-T5 (00g C: 100g FLGA). The results obtained showed that sperm motility, concentration and percentage of live sperm cells showed significant effects (P<0.05), while semen volume and percentage of normal sperm cells were not significantly affected by the test diets. Rabbits on T4 did not ejaculate within the experimental period. Mean testis density was not significantly affected, while paired testes weight, mean testis length, paired testes volume, paired epididymal weight and mean epididymal length were significantly (P<0.05) influenced by the dietary treatments. The results revealed that rabbit bucks on T2 and T3 performed better, rabbits on T4 performed least, while rabbit bucks in T5 could not survive beyond two weeks. Concentrate to FLGA at the ratios of 75g C: 25g FLGA (T2) and 50g C: 50g FLGA (T3) are therefore recommended as the best combinations for rabbit breeding bucks.
А grain harvester performance according to unloading time and modes
Authors: Tihanov G.
Published: April 2019

Abstract. The paper presents an analysis of the two ways of unloading the harvester grain hopper – unloading at standstill and unloading on the move. A passive experiment has been carried out during wheat harvest by measuring the loading time of a full harvester hopper into the transport vehicle. During its time measurement it has been found that for 237.4s the harvester is stopped and does not reap and does not perform actual output. The actual grain harvester output when unloading at standstill has been determined 17.15t/h (25.22 da/h) and the actually possible output if the harvester runs the same performance and unloads on the move it will reach an output of 20.91t/h (30.74 da/h), i.e. its output will increase by 19%. It has been found out that crop harvesting times can be shortened if the method unloading on the move is used, by about one day in harvesting the crop, respectively.
Effect of the diet with commercial dry yeast (Saccharomyces cerevisiae) on organoleptic qualities, chemical and biological parameters of common carp (Cyprinus carpio L.)
Authors: Abdulrahman N.M. , Al-Refaiee I.H. , Mutter H. Ali
Published: April 2019

Abstract. The purpose of the present study was to evaluate the replacement of different levels of animal protein concentrate (APC) with a commercial dry yeast Saccharomyces cerevisiae in diets on common carp performance. The experiment was conducted in the fish laboratory of the Department of Animal Production, College of Agricultural Sciences, University of Sulaimani in Kurdistan region of Iraq for the period from 25.07.2015 to 15.10.2015. Starting with a period of acclimatization for 21 days, to test the efficiency of using commercial dry yeast S. cerevisiae as alternative protein source to APC used in the manufacturing of diets for common carp (Cyprinus carpio L.) by using 90 fish at weights ranged 22-42g divided into 15 groups distributed randomly on 15 plastic containers by five treatments with three replicates per each variant. The treatments contain different levels of APC and yeast S. cerevisiae as follows: first treatment (Control T1): 100% APC / 0.00% yeast S. cerevisiae; second treatment (T2): 75% APC / 25% yeast S. cerevisiae; third treatment (T3): 50% APC / 50% yeast S. cerevisiae; fourth treatment (T4): 25% APC / 75% yeast S. cerevisiae and fifth treatment (T5): 0.00% APC / 100% yeast S. cerevisiae. There was no significant difference observed in the value of biological indices for some physiological organs, spleen and Hepatic pancreases and also in the value of the condition factor (CF) between carps from different treatments. The results of the chemical composition of the fish flesh showed significant difference in the moisture of individuals from T4 as compared with these from T2 and T5, T2 was significantly increased in crude protein as compared with other treatments, T5 had significant differences in fat crude as compared with other treatments, T1 and T2 were significantly different in ash as compared with other treatments, T1 was significantly different in carbohydrates as compared with other treatments. The results showed no significant differences observed among experimental treatments in Panel test of tenderness, color, juiciness, flavor and overall acceptance for fish meat.
DIESEL ENGINE OPERATION IN USE OF FUEL WITH ADDITIVES
Authors: Kazakov Petar , Iliev Atanas , Marinov Emil
Published: April 2019

Over the decades, more attention has been paid to emissions from the means of transport and the use of different fuels and combustion fuels for the operation of internal combustion engines than on fuel consumption. This, in turn, enables research into products that are said to reduce fuel consumption. The report summarizes four studies of fuel-related innovation products. The studies covered by this report are conducted with diesel fuel and usually contain diesel fuel and three additives for it. Manufacturers of additives are based on already existing studies showing a 10-30% reduction in fuel consumption. Comparative experimental studies related to the use of commercially available diesel fuel with and without the use of additives have been performed in laboratory conditions. The studies were carried out on a stationary diesel engine СМД-17КН equipped with brake КИ1368В. Repeated results were recorded, but they did not confirm the significant positive effect of additives on specific fuel consumption. In some cases, the factors affecting errors in this type of research on the effectiveness of fuel additives for commercial purposes are considered. The reasons for the positive effects of such use of additives in certain engine operating modes are also clarified.
ANALYSIS OF MODELS AND ALGORITHMS FOR MEASURING THE AREA OF VINE LEAVES
Authors: Georgieva Krasimira , Kazakova Miglena , Zlatev Zlatin
Published: April 2019

The area of the vine leaves is an important indicator for determining the quantity of leaf mass, making connections with the influence of the environment, improving the methods of growing the vineyards. Satellite and aviation measurements for now have the drawback that the images obtained are of low resolution and do not allow the measurement of the area of individual leaf. A solution to this problem is the use of unmanned aerial vehicles, which provide digital images of a small height (1-3m) and autonomous robots to navigate in the vineyards. These systems use video cameras operating in the visible, near infrared range and thermo cameras. The measurement of individual leaves and the search for links to the foliage and plant indicators is due to the fact that in order to do this when crawling the array, it is necessary to use low energy consumption devices. These devices also have poor computing resources. In this report a comparative analysis of 16 models describing the relationship between the area and the main dimensions of the leaf - long and short axis is made. Three of these models have been selected to describe this relationship with sufficient precision. They are compared with the 4 algorithm for measuring the area of the vine leaves. The results obtained show that the measurement error, the data processing time between the algorithms used and the models are comparable. The analyzes made suggest that the choice of a method for measuring the area of vine leaves depends on the desired accuracy, the time of receipt, the processing and the analysis of the results of what equipment the user has access to.
Praćenje mikrobiološke kvalitete i promjena kemijskog sastava mlijeka kobila primjenom različitih analitičkih metoda
Authors: Končurat Ana , Kozačinski Lidija , Bilandžić Nina , Cvrtila Željka , Sukalić Tomislav , Sedak Marija , Benić Miroslav
Published: April 2019

In this study the quality of Croatian coldblooded mare’s milk during six
months lactation period was investigated. Samples of milk were collected throughout six month’s lactation, from 22 mares and included three consecutive lactations. Physicochemical properties (pH, °SH, density) and chemical composition of raw mare milk have been studied. Fat, lactose, protein and solid non fat contents were analysed by infrared spectrophotometry and by conventional methods. Somatic cell count and microbiological parametres such as the total bacterial count, Enterobacteriaceae, coagulase positive staphylococci as well as presence
of pathogens, Salmonella species and Listeria monocytogenes were also researched. Results are presented as comparison of standard and instrumental methods for chemical analysis (fat, protein, solid non fat,
lactose). The mean values are presented as trends during lactation. Results were analysed by Stata 10.0. For results obtained by using different methods there were significant differences between methods for
milk fat on 10th day, lactose content on 10th and 60th day, and total solids non fat on 60th day of lactation. Values of milk fat, protein, lactose and solids non fat obtained on the 40th, 60th, 120th and 180th days of lactation by IR spectrometry were compared with the value obtained on the 10th day of lactation by the same method (IR spectrometry). Milk of the Croatian coldblooded mares showed stabile chemical composition for all ingredients except lactose (p=0.0001), and high microbiological quality throughout the lactation period.
Functional and sensory properties of olives fortified spreadable cheese
Authors: Repajić Maja , Grudenić Anamarija , Levaj Branka
Published: April 2019

The aim of this work was to investigate the influence of olive type (green and black) and content on quality and sensory properties of spreadable cheese with olives. Total solids, pH value, colour (colourimetric), total phenols by Folin-Ciocalteau method and antioxidant capacity (FRAP) of the raw materials as well as of the prepared samples were examined. Furthermore, samples of spreadable cheese with olives were sensory evaluated using the Quantitative Descriptive Analysis (QDA). ANOVA showed that the applied sources of variation significantly affected the majority of investigated parameters. Samples with black olives had slightly higher dry matter content and pH value, and were characterized by darker and dull colour. The determined total phenols contents and antioxidant capacity showed a good potential of spreadable cheese with olives as a functional food, whereby green olives samples had higher total phenols content as well as
antioxidant capacity. Generally, sensory properties of all samples were
very well scored, indicating their good acceptability by consumers. Samples with black olives accomplished higher scores for flavour harmony
and overall acceptability, where spreadable cheese with the highest olive content emphasized with the highest scores for these properties.
State Support for Private Investments in the Sphere of Physical Culture and Sports
Authors: Larina Olga
Published: April 2019

The mechanism of state support for private investments in the sports sector is being supplemented and improved. The article analyzes the Russian practice of public-private partnership in the sphere of physical culture and sports. The main purpose of the article is to generalize and systematize possible measures of state support of private investment in the sports industry in Russia, both at the Federal and regional levels. The forms of public-private partnership in the designated area, development trends and measures of state support existing both at the Federal and regional levels are investigated. Based on the analysis of the ongoing projects, as well as legal mechanisms that ensure the rights of investors in the Russian Federation, the conclusions are made about the need to improve the mechanisms of support for public-private partnership in the field of physical culture and sports. When implementing such projects, it is necessary to take into account the specifics of this sphere, while it is advisable to determine transparent and unambiguous criteria for the allocation of public funds. The author believes that the interaction of business in the field of physical culture and sports with the State should achieve a balance between the private interests of business and social objectives that are set and should be addressed in the interests of society.
Reindustrialization of Old Industrial Regions in the South of Russia: Trends, Potential, Risks
Authors: Mitrofanova Inna , Chernova Olga
Published: April 2019

In modern conditions, re-industrialization in Russia is aimed at leveling the trend of reducing the share of the manufacturing industry in the GRP of a number of old-industrial regions in recent years due to the implementation of the strategy of restoring the leading role of industry, transition to a new technological structure, the formation of productive forces. The article deals with the problem of modernizing the economy of the old industrial regions of the South of Russia based on the restoration of the industrial sector of the economy on a modern technological basis. It was noted that during the years of market reforms in the South Russian regions (Rostov, Volgograd, Astrakhan regions) almost all mining enterprises were closed, the activities of many enterprises of mechanical engineering, machine-tool construction, instrument engineering, enterprises for the production of bearings, fabrics, footwear were curtailed, which led to the destruction of existing industrial chains and provoked a new liquidation of production in other regions, the loss of its southern industry positions in the structure of the national economy. The main trends in the industrial development of the South Russian regions, which are reflected in a change in the distribution of economic activity and population in space, as well as in a change in the properties of the economic space of the region, are identified. The specific development factors are defined. They include multistructured regional economy and high dependence on economic instability factors in neighboring countries. It was concluded that it is necessary to move from the implementation of point projects to a comprehensive solution of the problems of structural imbalance in the regional economy related to increasing the capitalization level of the industrial modernization potential. The authors concluded that the strategy of re-industrialization should be based on the priority development of industrial production, allowing to enhance synergistic effects through a rational combination of the economic potentials of industrial production in central and peripheral territories of southern Russia.
Opening Editorial: Conversations in health care education
Authors: Marshall Stuart , Kiegaldie Debra
Published: April 2019

This article was migrated. The article was marked as recommended. Clinical education happens predominantly via conversations. Conversations between the educator and learner, among learners, between those giving and receiving health care and even among educators striving to improve in their teaching. Sometimes these conversations may be difficult, with troublesome feedback and hard lessons to learn, sometimes they are unstructured and messy. Almost always, more dialogue is needed.This theme coincides with the 8th International Clinical Skills Conference in Prato, Italy. The conference has a history of starting conversations among researchers, educators and clinicians and the theme for the conference coincides with the theme for this issue. This pairing of a conference with a post publication peer review journal has not to our knowledge been previously attempted. This format gives a unique opportunity to provide a deeper learning from the peer review process. High-quality submissions will be published on the site and presented at the conference. Readers and conference attendees alike will be able to comment on the papers presented. In this way, discussions in person, online and via the traditional publishing route can be brought together to improve the publishing and research process. Indeed, the theme of 'conversations' could not be more apt than in these 'metaconversations' about educational research. We believe that the conversations within the walls and courtyard of the Palazzo Vaj that have influenced so many educational researchers in the past will have a chance to reach a wider audience than just the conference attendees.Some of the types of conversations in clinical skills we will discuss have great importance in the future of clinical education and for developing health professionals with the skills needed for person-centre care. We especially wish to promote articles that highlight work undertaken in Low-Middle Income Countries (LMICs) as these align with the values of the charity that underpins the conference, the International Clinical Skills Foundation (Inc.).