bluuebunny/crossref_metadata_2025 huggingface dataset:
Influences of Varying Current by Tungsten Inert Gas Welding and its Process Parameters on Weld Quality of AA 6061 Aluminium Alloy
Authors: Preethi K.H. , Ajay Kumar B.S. , Krishna Prasad N.J. , Barat K.
Published: July 2018

An extensively studied Al-Mg-Si (AA6061) alloy has been considered for this investigation. This alloy is used for large number of industrial applications since it possesses medium to high strength to weight ratio, excellent weldability and corrosion resistance. It has been observed that these alloys are usually used in sheet form and were welded for large application. Even though a number of welding procedures are available, the most convenient and economical procedure of tungsten inert gas (TIG) welding was used to weld Al-Mg-Si sheets. All the sheets were having a thickness of 3.0 mm. In the case of single pass TIG welded samples, the pulsed current has been found beneficial as it is most advantageous over the conventional continuous current process. The use of pulsed current parameters has been found to improve the mechanical properties of the welds compared to those of continuous current welds of this alloy. This is possibly due to the grain refinement occurring in the fusion zone. These results clearly demonstrated that current parameters and its optimization is most important aspect for obtaining a good weldment. An Influence of process parameters and their influence on mechanical properties are explained in detail in light of microstructural details.
An Experimental Study on Mechanical Behaviour of Pulsed Current Welding on Aluminum Alloy Joints
Authors: Garugubilli Ramu , Sramika M.L. , Kumar V. Pradeep
Published: July 2018

Aluminum alloys (Al–Si–Mg alloys) have gathered wide acceptance in the fabrication of light weight structures requiring high strength-to weight ratio, such as transportable bridge girders. An improvised method is Pulsed current tungsten inert gas (PCTIG) welding (Developed in 1950s). The pulse current is more frequently used in manual welding because it has a lot of advantages in comparison to direct current. The main advantages are improved bead contour, greater tolerance to heat sink variations, lower heat input requirements, reduced residual stresses and distortion. In the present work to study the effect of PCTIG welding over continuous current TIG welding, work plates of 6 mm thickness have been used as the base material for preparing single pass welded joints. Single V butt joint configuration has been prepared for joining the plates. The filler metal used for joining the plates is AA 5356 (Al–5Mg (wt%)) grade aluminum alloy The preferred welding processes of moderately high strength aluminum alloy are frequently tungsten inert gas welding (TIGW) process. Two different welding techniques are used to fabricate the joints and they are: (i) continuous current TIG welding (CCGTAW) (ii) pulse current TIG welding (PCGTAW) processes. Argon (99.99% pure) has to use as the shielding gas. This report presents the effect of pulsed current TIG welding on mechanical behavior of high strength aluminum alloy joints, and studying about the grain refinement of weld bead, conducting the mechanical tests such as tensile test, impact test, and hardness test. Pulsed current welded joints have given superior mechanical properties comparative to continue current welded joints. PCTIG welded joints given high tensile strength, hardness and impact strength values. Current pulsing leads to relatively finer structure.
A Feasibility Report on the Comparsion of the Characteristics of Manufacturing a Bearing Cover by the Processes of Sand Casting and Shell Moulding
Authors: Vamsi M.Madhu , Kumar V. Pradeep , Shariff S.H.
Published: July 2018

The use of aluminum castings in the automotive industry has increased dramatically over the past two decades. The Al-Si system forms the basis of many important casting alloys, LM 0, LM 2, LM 4, LM 5, LM 6, LM 12, LM 13, LM 24 and LM 26 are the major cast alloys used in aerospace casting (e.g., fuel pump connectors) and premium automotive castings (e.g., suspension arms). The driving force for this increased use is vehicle weight reduction for improved performance, particularly fuel efficiency. In many cases the mechanical properties of the cast aluminum parts are superior to those of the cast iron or wrought steel parts being replaced; however, in some applications, defects in the cast microstructure undermine performance characteristics.
Effect of Blast Furnace Slag and Red Mud Reinforcements on the Mechanical Properties of AA2024 Hybrid Composites
Authors: Siva Karuna G. , Swamy S.Venu Gopala , Naidu G. Swami
Published: July 2018

In the present days, hybrid metal matrix composites exhibit the better mechanical properties when compared with the uni-reinforced metal matrix composites. Due the light weight and improved mechanical properties these materials find the better applications in the area of aerospace and automobiles. The present investigation aims to evaluate the mechanical properties of Aluminum 2024 T351 reinforced with Blast Furnace Slag and Red Mud. Composites with industrial wastes like blast furnace slag and red mud as reinforcements are likely to overcome the cost barrier for wide spread applications. Blast Furnace Slag particulates are reinforced in AA2024 by decreasing 4 to 1% by weight. Red Mud particulates are reinforced in AA2024 by increasing 1 to 4% by weight. The composites are synthesized by using the stir casting technique. The mechanical properties are optimized for the composite with 2% Blast furnace slag and 3% Red Mud. Micro structural studies carried out using SEM, reveals the uniform distribution of the reinforcement in the matrix phase.
Equal Channel Angular Extrusion of AA 5083
Authors: Ananda Babu Varadala , Swami Naidu Gurugubelli , Sateesh B.
Published: July 2018

Equal Channel Angular Extrusion (ECAE) is used as a top down process to produce bulk nano/ultrafine grain structured materials by inducing high amount of strain with less experimental set up. In the present study AA 5083 alloy with circular and square cross sections are extruded at room temperature using two dies having cannels with circular and square cross sections respectively. Both the dies used in this study are having same channel angle (Φ)1200 and outer corner angle (Ψ) 200. The circular and square billets are extruded for four times in route BC. The objective of this work is to study the effect of cross section of the billet, number of passes on grain refinement, mechanical properties and wear behaviour of AA 5083. Significant reduction in grain size is observed in extruded material using Field Emission Scanning Electron Microscope (FE-SEM) in the range of 80nm to 600nm after four passes. The microhardness in extruded materials is improved with no. of passes in both cross sectioned billets and it is more predominant for square billets even after two passes. The effect of dead zone is less in case of square billets and hence they have shown more structural homogeneity. The dry sliding wear tests are conducted to study the wear behaviour of the ECAEd materials. It is observed that the wear rate and coefficient of friction are reduced with number of passes in both the cases and rate of decrease is more in case of square billets.
Utilization of Ring Compression Test to Investigate the Mushroom Effect and Adhesive Nature of AA2014 Billets
Authors: Harikrishna Chirala , Davidson M.J. , Srinivasa Raju P. , Rao G. Srinivasa
Published: July 2018

In the cold forging of AA2014, friction at the die/billet interface plays a significant role. AA2014 metallic rings of height 8 mm with an outer diameter of 24 mm and inner diameter of 12 mm was upset between H13 steel dies to different levels of deformation. Different types of lubricants namely, grease, molybdenum disulphide, white grease, palm oil were employed at the die/ring interface and ring compression test was also conducted for un lubricated condition. The values based on the changes in the geometry after different levels of deformation were fit into Male and Cockroft calibration curves to estimate the friction factor (m). The values of friction factors determined from the experiments were given as input to the finite element package, Deform 2D. The results obtained from the finite element studies were compared with the experimental results. After validation, the research was extended by considering ring geometries of different sizes. The effect of the friction between the die/billet interface and geometry were studied on the flow of metal. The zone of minimum velocity of particles, defined as neutral plane was analyzed for different friction conditions and different geometries of the ring.
Mechanical Interlocking of an Aluminum Alloy and SS400 Structural Steel through Friction-Stir Spot Forming (FSSF)
Authors: Mofidi Tabatabaei Hamed , Ishikawa Ryuji , Nishihara Tadashi
Published: July 2018

In the present study, a novel method for mechanically interlocking the dissimilar alloys of A6061-T6 aluminum alloy and SS400 structural steel using friction-stir forming (FSF) is suggested. In this study, the aluminum alloy is placed on top of a steel sheet containing a screwed hole. The present study suggests that friction-stir spot forming (FSSF) can be used to form a mechanical interlock between the aluminum alloy and steel sheet. FSSF is conducted on top of the aluminum alloy, which produces sufficient heat to plasticize the aluminum alloy. This results in a flow of aluminum into the screw hole in the steel, due to the plastic deformation, thereby mechanically interlocking the aluminum with the steel. Moreover, with the proposed method, the authors present a new concept of an easily separable joining of dissimilar alloys. The mechanical properties of the developed interlock are investigated through tensile and hardness tests and microstructural observation.
Synthesis and Properties of Phenyl Silicone Resin Reinforced Addition Type Liquid Phenyl Silicone Rubber
Authors: Peng Dan , Mu Qiu Hong , Zhang Shuo , Li Jin Hui , Wang Feng
Published: July 2018

Phenyl silicone resin reinforced addition type liquid phenyl silicone rubber was prepared by vulcanization of vinyl end-capped polymethylphenylsiloxane (PVPS), phenyl MT resins and hydrogen end-capped polydiphenylsiloxane (PHPS) under Pt catalysis at 150°C for 4h. The effects of the proportion and the vinyl content of phenyl MT resins on the mechanical properties of cured products were investigated. The thermal stability was explored by thermogravimetric analysis. The changes of mechanical properties were also studied before and after irradiation. Phenyl silicone rubber with good performance was obtained when the phenyl MT resin content was 50~60 wt% and the vinyl content was at 5.5~6.6 wt%. The onset temperature of thermal degradation and the center temperature of thermal degradation were 443.7°C and 502°C, respectively. When the radiation dose increased from 0 to 300 KGy, the tensile strength decreased from 4.1MPa to 2.3MPa and the tearing strength decreased from 8.9MPa to 5.1MPa. When the radiation dose continues to increased from 300 to 900 KGy, the tensile strength increased from 2.3MPa to 6.4MPa and the tearing strength increased from 5.1MPa to 6.5MPa. During the process of radiation, the elongation at break had been kept down from 96% to 52%, and the hardness increased from 80A to 90A.
Silica Modified Membrane for Carbon Dioxide Separation from Natural Gas
Authors: Kajama Mohammed Nasir , Yildirim Yilmaz , Taura Usman Habu , Grema Alhaji Shehu , Abdulrahman Shehu
Published: July 2018

A dip-coating technique was applied to prepare a selective membrane on a commercial ceramic mesoporous support. Single gas components used for permeance and selectivity were CH4, CO2, H2, He, N2, and O2(BOC UK) with at least 99.999 (% v/v) purity. The permeances and selectivities were obtained at room temperature and transmembrane pressure differences between 0.05 up to 5.0 barg. Gas permeation experiments showed the permeance of CO2to be strongly influenced by surface diffusion mechanism. Single gas experiment showed linear flow dependence on the inverse square root of molecular weight at room temperature and 1.0 barg. The single gas selectivities were found to be higher than the ideal Knudsen separation mechanism. The highest CO2/CH4selectivity value of 24.07 was obtained at 0.7 barg and room temperature.
Survival time data and their first statistical analysis: Review
Authors: De Mel Withanage Ajith Raveendra
Published: July 2018

In the life testing, medical follow-up studies, and other fields, it is often impossible to observe the lifetimes of all experimental units in the study. These types of data are called survival data. Because of the nature of the data, we cannot obtain the full information of the survival data. Therefore, it is not possible to apply the standard statistical techniques to analysis such survival data. In this paper, I mainly focus onright censoring data and explain how to derive the basic nonparametric estimators of cumulative distribution (Kaplan-Meier estimator), hazard, and cumulative hazard function using observed data. In addition to that I discuss how to compare the survival probabilities in two or more groups by using log-rank test. I also introduce the proportional hazard model (Cox’s model) to incorporate the other related covariates to the experiment. Finally, I present some simulation study and real data application.
Cutting Edge: Critical Roles for Microbiota-Mediated Regulation of the Immune System in a Prenatal Immune Activation Model of Autism
Authors: Lammert Catherine R. , Frost Elizabeth L. , Bolte Ashley C. , Paysour Matt J. , Shaw Mariah E. , Bellinger Calli E. , Weigel Thaddeus K. , Zunder Eli R. , Lukens John R.
Published: July 2018

Recent studies suggest that autism is often associated with dysregulated immune responses and altered microbiota composition. This has led to growing speculation about potential roles for hyperactive immune responses and the microbiome in autism. Yet how microbiome–immune cross-talk contributes to neurodevelopmental disorders currently remains poorly understood. In this study, we report critical roles for prenatal microbiota composition in the development of behavioral abnormalities in a murine maternal immune activation (MIA) model of autism that is driven by the viral mimetic polyinosinic-polycytidylic acid. We show that preconception microbiota transplantation can transfer susceptibility to MIA-associated neurodevelopmental disease and that this is associated with modulation of the maternal immune response. Furthermore, we find that ablation of IL-17a signaling provides protection against the development of neurodevelopmental abnormalities in MIA offspring. Our findings suggest that microbiota landscape can influence MIA-induced neurodevelopmental disease pathogenesis and that this occurs as a result of microflora-associated calibration of gestational IL-17a responses.
Protecting the Karst Te Waikoropupū Springs in New Zealand
Authors: Mead Donald James
Published: July 2018

The sacred Te Waikoropupū Springs are New Zealand’s largest, have some of the clearest freshwater worldwide and are a major tourist attraction. They are part of a large karst system, the Arthur Marble Aquifer complex of 180 km2 that has two main interconnected aquifers which have mean residence times of 10.2 and 1.2 years, respectively. The Springs have a high water clarity of 63 m, due to the action of biofilms and stygofauna in the aquifers; to protect this water clarity it is recommended that the level of NO3-N in the Springs should not exceed 0.4 mg/L. In the aquifers’ unconfined zone there are 45 km2 of lowland, free-draining gravels that receive over 2000 mm/a rainfall. The intensification of dairy farming on these soils has resulted in the Springs NO3-N rising to above this trigger concentration of 0.4 mg/L. Three processes, in order of effectiveness, are being considered to control farm impacts on water quality: 1. Dairy farmers have volunteered to stop cattle having direct access to waterways, to manage their dairy-shed waste better and to plant narrow riparian strips. There is some evidence this has reduced farming impacts to waterways. 2. The second method, promoted by the local regional council, is to have stakeholders, assisted by professionals, to recommend water allocation and water quality guidelines for inclusion in their regional plan. This method is ongoing. However, it could be captured by special interest groups and the rules could be relaxed over time. Consultation with the local indigenous Iwi (tribe), who have strong spiritual values for water, is essential. 3. To afford the strongest protection a local Iwi, Ngāti Tama, and Andrew Yuill have applied for a Water Conservation Order (WCO) on the Springs complex and aquifers. This is allowed for in New Zealand law, would provide the strongest long-term protection and, when granted, has to be implemented by the Council. A very recent, but untested, alternative would be to give the waterbody personhood (legal status equivalent to a human), to be managed by guardians. This has been done for one New Zealand River.To protect the aquifers, the WCO, which offers the greatest control, is recommended.
Physical, chemical and biological characterization as support for water governance in a hydrogeological system of Colombia
Authors: Ossa Valencia Juliana , Betancur Vargas Teresita , Camilo Duque Jhon , Cardona Perez Angel Jose , Pineda Zapata Laura , Villegas Yepes Pedro Pablo , Paredes Zuniga Vanessa , Molano Cajigas Carlos
Published: July 2018

Understanding the physical, chemical and biological system is an indispensable precondition to addressing groundwater management. This understanding is based on Conceptual Hydrogeological Models, which contain different interpretations and their validity is checked through the application of specific research techniques (numerical modelling, hydrochemistry, isotope hydrology,process evaluation and biological functions). This paper describes the experience carried out by an academic team that, together with entities responsible for the protection of waterresources, established strategic alliances to improve the knowledge of the hydrogeological system,providing new elements for governance. This study was carried out in the Urabá antioqueño zone, located north-west of Colombia. A complex aquifer system is located in the region,characterized by a series of permeable, semi-permeable and impermeable layers. In such alayered aquifer the determination of the physical, chemical and biological characteristics of the layers and their management are a challenge for researchers because groundwater represents a strategic resource for supplying the population and developing economic activities. Starting from the conceptual hydrogeological model, multiscale numerical modelling exercises have been carried out, enabling the characterization of local, intermediate and regional flow systems. In addition,by determining the natural background level, the concentration ranges of chemical compounds from natural sources were obtained, in order to detect future changes in water quality. It was also possible to examine the stygofauna, which allowed the recognition of different types of organisms (stygobits, stygophiles and stygoxens) associated with underground ecosystems.These scientific elements serve as a support for the management instruments such as the groundwater management plan that is important for water governance, ensuring its future sustainability.
Potential reduction in energy consumption in consolidated built environments. An analysis based on climate, urban planning and users
Authors: Compte Coloma Esther
Published: July 2018

In order to minimise the environmental problems of energy consumption this study aims to assess the potential energy demand reduction of the three main building types within three urban configurations of a Mediterranean city in the Comunitat Valenciana Region, Spain. To do so this project aims to identify the urban configuration which makes the best use of sun and natural ventilation, and whether this potentially affects the energy consumption of users in three vulnerable neighbourhoods as an analysis methodology prior to any intervention on the building stock.
Factor analysis was carried out in summer taking into account the greater influence of the climate factors in the warm region under study. Therefore, winter conditions were excluded from this analysis as the installations, and the state of conservation of the envelope were the main factors affecting the energy consumption at this time of year. The results obtained show that there is true potential for reducing consumption in the buildings analysed. Due to the viability and easy implementation of these actions, and given the embodied energy, the measures for optimising the envelope of buildings are inadvisable or to be considered only as a last resort.
A comparison of the content and primary literature support for online medication information provided by Lexicomp and Wikipedia
Authors: Hunter Julia Alexandra , Lee Taehoon , Persaud Navindra
Published: July 2018

Objectives: The research compared the comprehensiveness and accuracy of two online resources that provide drug information: Lexicomp and Wikipedia.Methods: Medication information on five commonly prescribed medications was identified and comparisons were made between resources and the relevant literature. An initial content comparison of the following three categories of medication information was performed: dose and instructions, uses, and adverse effects or warnings. The content comparison included sixteen points of comparison for each of the five investigated medications, totaling eighty content comparisons. For each of the medications, adverse reactions that appeared in only one of the resources were identified. When primary, peer-reviewed literature was not referenced supporting the discrepant adverse reactions, a literature search was performed to determine whether or not evidence existed to support the listed claims.Results: Lexicomp consistently provided more medication information, with information provided in 95.0% (76/80) of the content, compared to Wikipedia’s 42.5% (34/80). Lexicomp and Wikipedia had information present in 91.4% (32/35) and 20.0% (7/35) of dosing and instructions content, respectively. Adverse effects or warning content was provided in 97.5% (39/40) of Lexicomp content and 55.0% (22/40) of Wikipedia content. The “uses” category was present in both Lexicomp and Wikipedia for the 5 medications considered. Of adverse reactions listed solely in Lexicomp, 191/302 (63.2%) were supported by primary, peer-reviewed literature in contrast to 7/7 (100.0%) of adverse reactions listed only in Wikipedia. A review of US Food and Drug Administration Prescribing Information and the Adverse Event Reporting System dashboard found support for a respective 17/102 (16.7%) and 92/102 (90.2%) of Lexicomp’s adverse reactions that were not supported in the literature.Conclusion: Lexicomp is a comprehensive medication information tool that contains lists of adverse reactions that are not entirely supported by primary-peer reviewed literature.
Developing occupational therapy students’ information and historical literacy competencies: an interprofessional collaborative project
Authors: Fleming-Castaldy Rita P.
Published: July 2018

Objective: The study examined the efficacy of an interprofessional information and historical literacy project implemented by an occupational therapy educator and a librarian.Methods: A graduate course was revised to include information and historical literacy objectives and instruction. A course-specific questionnaire administered on the first and last day of class, assignment grades, and course evaluations provided measures of project outcomes for six years. Differences between questionnaire pre- and post-test means were determined using t-tests. Course evaluation comments were analyzed to obtain qualitative perceptions.Results: A significant difference (p<0.0001) was found between pre-test (M=3.93, SD=0.48) and post-test (M=4.67, SD=0.30) scores of total information and historical literacy competence across all years (n=242). Responses to individual items also differed significantly (p<0.0001). Student ratings (n=189) from the course evaluation historical literacy objectives were high (M=4.6 on a 5-point scale). Assignment quality and grades improved, and course evaluation comments reflected student satisfaction.Conclusions: The findings supported the hypothesis that students’ self-reported information and historical literacy competencies would increase after project participation. Acquired skills were evident in students’ assignments. Research to determine if these capabilities were used post-graduation is needed. Because this was a course-specific project, findings are not generalizable; however, the instructional methods developed for this project can serve as a model for effective interprofessional collaboration. The broadening of information literacy instruction to include discipline-specific historical literacy provides a unique opportunity for health sciences librarians and educators. Developing students’ historical literacy in their chosen fields can help them understand their profession’s present status and be informed participants in shaping its future.
Updating professional development for medical librarians to improve our evidence-based medicine and information literacy instruction
Authors: Costello Joseph
Published: July 2018

Medical librarians lack professional development opportunities in the critical appraisal of biomedical evidence. An update to our professional development opportunities could support our efforts to teach critical appraisal of biomedical evidence during evidence-based medicine or information literacy instruction. If we enhance our understanding of latent influences on evidence quality—such as changes to Food and Drug Administration regulations, predatory or deceptive publishing practices, and clinical trial study designs—we can improve our value to medical education and hospital systems.
Reading graphic medicine at the National Library of Medicine
Authors: Tuohy Patricia , Eannarino Judith
Published: July 2018

The Exhibition Program, part of the History of Medicine Division of the National Library of Medicine, spotlights the collection of the library by creating exhibitions and educational resources that explore the social and cultural history of medicine. Our goal is to stimulate people’s enthusiasm for history and encourage visitors of all ages to learn more about themselves and their communities. We do what we do because we believe that health and well-being are fundamental human rights and are essential to our American way of life. And we believe exhibitions are a logical expression of that commitment.Oftentimes, exhibitions focus on underrepresented subjects or lesser-known types of literature, which helps to inform the library’s collection development activity. Collection development staff take a keen interest in viewing exhibitions, attending related lectures, and performing bibliographic research on topics that are unlikely to be captured in conventional scientific and professional literature. This heightened awareness leads staff to discover niche publishers, significant authors, and unique titles, thereby enriching the collection for future generations.Following the decision to embark on an exhibition about graphic medicine, collections staff more closely investigated this class of literature. This column explores how wider social and cultural influences can change the medical literature and inform and enrich the collections policies of an institution.
Assembling the Pieces of a Systematic Review: A Guide for Librarians
Authors: Natal Gerald
Published: July 2018

Assembling the Pieces of a Systematic Review: A Guide for Librarians is a well-written book by qualified authors that serves as a manual for conducting reviews or forming and managing a review service, regardless of skill level.
Home telework, travel behavior, and land-use patterns: A path analysis of British single-worker households
Authors: De Abreu e Silva João , Melo Patricia C.
Published: July 2018

This work analyzes the effects of home-based teleworking on the number of trips and weekly miles travelled by mode and purpose for one-worker households in Great Britain using data from the National Travel Survey for the period between 2005 and 2012. Two path analysis models are developed, one considering weekly trips and travel distances by mode and the other weekly trips and travel distances by purpose. Both models consider teleworking frequency in the context of home and workplace land-use characteristics, commuting distance, car ownership levels and weekly trips and travel distances. This framework allows us to explicitly model endogenous relations in the chains of decisions relating these variables. The results suggest that home-based teleworking is a strategy used by people to cope with long and costly commutes. Workers living in less transit accessible areas and with longer commutes tend to work from home more frequently. The main conclusions relating to teleworking frequency point to the fact that it increases weekly miles travelled, particularly by car, while it does not reduce commuting distances travelled. These results suggest that home-based teleworking is not an effective travel demand management strategy, particularly because it seems to increase car use. The overall main result is that teleworkers travel more by more polluting transport modes.
Holocene development of the Marker Wadden area, Lake IJssel (the former Zuider Zee), The Netherlands
Authors: Troelstra Simon , Laban Cees , Prins Maarten , Beets Kay , Diepen Maarten van , Grooteman Lucien , Hageman Bas , Portanger Leonie , Rumping Sylvain , Sadhoeram Archana
Published: July 2018

Detailed analysis of a core taken within the framework of the Marker Wadden project reveals the sedimentary history of the central part of the Netherlands following the Holocene sea level rise. Grain size and thermogravimetric analyses coupled with micropalaeontological and stable oxygen isotope data provide a solid framework for a detailed reconstruction of the landscape during this time interval. The Pleistocene landscape of fluviatile and aeolian deposits was succeeded by periods of marsh growth, brackish semi-enclosed lakes and tidal flats until a permanent connection with the North Sea was established. Palynological data suggest human activities in the immediate surroundings of the research area.
Las competencias de los formadores en el Programa de Competencia Familiar , un programa de educación familiar basado en la evidencia
Authors: Orte Socias Carmen , Ballester Brage Lluís , Pascual Barrio Belén , Gomila Grau Maria Antònia , Amer Fernández Joan
Published: July 2018

Los programas de educación familiar trabajan con las habilidades parentales, comunicativas, relacionales y organizativas para fomentar el cambio social positivo. Se trata de unos programas donde el rol de los  formadores es clave para implicar y motivar a las familias en los procesos de aprendizaje. En el presente artículo se investigan las características de los formadores, para identificar los factores de éxito de su trabajo durante las implementaciones. Se han llevado a cabo entrevistas y grupos de discusión con diferentes formadores del Programa de Competencia Familiar, una experiencia de trabajo socioeducativo con familias. Los resultados apuntan la importancia de las habilidades específicas con padres y con hijos, el rol de la experiencia y el peso de las habilidades comunicativas y de gestión del grupo. Las principales conclusiones señalan que los formadores, a través de la participación en el programa, valoran la necesidad de mejorar su formación y entrenamiento, así como también reconocen el efecto positivo del trabajo en equipo.
Validez de contenido y consistencia interna de un cuestionario sobre el proceso de inserción socio-laboral desde la mirada del universitario
Authors: Martínez Clares Pilar , González Lorente Cristina
Published: July 2018

En el actual contexto de crisis e inestabilidad laboral, los universitarios experimentan una nueva realidad en la que adquieren un valor añadido factores y variables psicosociales que determinan o condicionan la búsqueda de empleo, así como la propia calidad del proceso de inserción socio-laboral. En esta línea, el objetivo del presente estudio es realizar la validación de un cuestionario ad hoc con el que se pretende conocer cuáles son las principales inquietudes, necesidades, expectativas, experiencias y recursos hacia la inserción socio-laboral de los universitarios. En total, participan 931 estudiantes de último curso de Grado de la Universidad de Murcia y la Universidad de Granada. Para la recogida de información y análisis de los datos, se aplica una metodología mixta que permite obtener evidencias de contenido y constructo del instrumento en un único proceso. Los principales resultados aportan una adecuada concordancia inter-jueces, así como unos elevados índices de fiabilidad en las diferentes escalas utilizadas en el cuestionario, que sirven para corroborar la pertinencia, adecuación y validez de los datos recabados en el mismo; constituyéndose así como una interesante aportación en el ámbito científico y psicométrico para aquellas líneas de investigación que dirijan su foco de interés hacia el difícil proceso de inserción sociolaboral de los universitarios y su empleabilidad.
Qué piensan los actores sociales sobre las competencias : el Grado de Educación Social
Authors: Gómez Sánchez Tania Fátima , Rumbo Arcas Maria Begoña
Published: July 2018

La perspectiva utilitarista basada en la universidad, como un vivero de profesionales especializados, sitúa su centro de interés en las necesidades de los mercados, diseñando los planes de estudio y las titulaciones ad hoc. El Espacio Europeo de Educación Superior (EEES) ha respaldado esta perspectiva como una de las mayores preocupaciones en el proceso de convergencia de la educación superior en Europa.Sin embargo, las investigaciones y estudios sobre la adquisición de las competencias y su incidencia en el mercado laboral son escasos (Foncubierta, Perea & Siles, 2016; Aragón et al., 2015), especialmente en el contexto universitario español y desde una perspectiva pedagógica y educativa.Consecuentemente, nuestro propósito es saber si la estructura en competencias de los planes de grado ha sido un medio para favorecer la empleabilidad de egresados y egresadas. Para tal fin, hemos llevado a cabo un estudio cualitativo en el Grado de Educación Social de carácter descriptivo — fenomenológico desde la perspectiva de distintos agentes sociales.Como síntesis de los resultados se puede afirmar que el conocimiento de los agentes sociales con respecto a los cambios derivados del EEES es fundamentalmente estructural, evidenciando un cierto distanciamiento, que se traduce en un escaso conocimiento de las competencias de la titulación objeto de estudio; reivindican la necesidad de un mayor diálogo de las instituciones universitarias con la sociedad y cuanto a los aspectos que favorecen la integración laboral, ponen de manifiesto la necesidad de una mayor definición del rol profesional.Por tanto, podemos concluir que no se ha observado una toma de conciencia con respecto al valor del Grado, ni se ha evidenciado el diálogo de la institución universitaria con la sociedad. Así, las competencias no parece que se hayan instituido como el vínculo entre la enseñanza universitaria y el ámbito laboral. ámbito laboral.
Interpreting Machiavelli's Tribunes of the Plebs
Authors: Barthas Jérémie
Published: July 2018

In the last thirty years, the “aristocratic” current of the republican tradition of thought has seen a revival largely based on a reinterpretation of Niccolò Machiavelli's contribution. Quite recently, this reinterpretation was challenged by emphasizing the fundamentaly “anti-aristocratic” and radically “democratic” nature of Machiavelli's thinking. After John McCormick's Machiavellian Democracy (2011), Lawrence Hamilton's Freedom Is Power (2014) is the latest attempt to engage critically with both interpretive currents and to offer institutional solutions for the ongoing crisis of representation in liberal democracies, most notably by proposing to update the ancient institution of the tribunes of the plebs. In this article I discuss McCormick and Hamilton's interpretation of Machiavelli's tribunician function, and bring into the debate an examination of Florentine institutions and of Machiavelli's constitutional draft of 1522 (not yet published in English).
SOUZA, Jessé. A Elite do Atraso: Da Escravidão à Lava Jato, São Paulo: Editora Leya, 2017. 242p.
Authors: Barbosa Marco Aurélio
Published: July 2018

Resenha
QEEG post-effects after the competition in Professional Female Soccer Players
Authors: Tharawadeepimuk Kittichai , Wongsawat Yodchanan
Published: July 2018

Brain central fatigue has been hypothesized as a factor affecting sports performance that generally occurs after a competition. Therefore, the aim of this study was to observe brain activities after participating in a competition. This study used quantitative electroencephalography (QEEG) to evaluate brain central fatigue, and the results were analyzed in terms of brain connectivity (coherence) in the delta frequency bands.

QEEGs were recorded from twenty-nine Thai professional female soccer players (mean age ± SD was 24.17 ± 2.633 years, mean height ± SD was 1.620 ± 5.552 meters, mean weight ± SD was 55.10 ± 5.853 kg). We recorded QEEG three times: twice before a competition (once a week) and one week after the competition. Data obtained were analyzed by using the Z-scored FFT method. The results of brain connectivity were represented in terms of coherence.

The present study revealed brain central fatigue in athletes after the competition (p=.035 and p=.003). This condition could affect their performance during games. Moreover, the key players showed specific brain patterns that were significantly different from substitute players (p<.000). The brain commonly returns to a normal state after a competition. This phenomenon was observed in the substitute players. Contrastingly, key players (on the ground players) exhibited the brain central fatigue phenomenon.

Our study confirmed that brain central fatigue can arise after a competition, and specific brain patterns can identify the level of sports performance. These findings are beneficial for predicting athletes’ performances in terms of aspects of the brain. This approach can be used to measure and interpret brain central fatigue conditions.
Prediction of the Porosity of Barrier Woven Fabrics with Respect to Material, Construction and Processing Parameters and Its Relation with Air Permeability
Authors: Malik Samander Ali , Malik Samander Ali , Kocaman Recep Türkay , Gereke Thomas , Aibibu Dilbar , Cherif Chokri
Published: July 2018

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Effects of the Vacuum Moulding Process on the Mechanical Properties of Cotton/Epoxy Composite
Authors: Tafur Cristian Lozano , Mora Edgar Espejo , Baracaldo Rodolfo Rodríguez
Published: July 2018

A study on the effect of the vacuum assisted resin transfer moulding (VARTM) manufacturing process on the mechanical properties of cotton/epoxy composite is presented in this investigation. Woven cotton was used as reinforcing material embedded in epoxy resin. The woven cotton was treated with sodium hydroxide for one hour at concentrations of 0% to 20%. The tensile test showed that the untreated material had the highest ultimate strength and Young’s modulus. Observation of the fracture surface by scan electronic microscopy (SEM) was compared to the hand lay-up process as well as the results of the tensile test. The comparison showed that the VARTM process presents better mechanical properties than the hand lay-up process due to the reduction in discontinuities observed by means of optical microscopy.
Synthetic Textile Wastewater Treatment using Potassium Ferrate(VI) – Application of Taguchi Method for Optimisation of Experiment
Authors: Thomas Maciej , Barbusiński Krzysztof , Kliś Simona , Szpyrka Ewa , Chyc Marek
Published: July 2018

The article attempts to assess the usefulness of the Taguchi method to optimise the purification process of synthetic textile wastewater (pH 6.7 - 7.2, Conductivity = 6.71 - 6.84 mS/cm, Salinity = 3581 - 3648 mg NaCl/l, Colour = 560 - 4710 mg Pt/l, COD = 2220 - 2290 mg O2/l, TOC = 394 - 551 mg/l) using K2FeO4. The research was conducted using 3 types of wastewater containing anionic detergent (sodium lauryl sulfate, 100 mg/l) and differing only in the concentration of azo dye Acid Green 16 (AG 16). Technical K2FeO4 was used as an oxidiser, which was subjected to physico-chemical analysis (purity, UV-VIS spectrum, surface characteristics and chemical composition using SEM and EDX methods). For planning and optimising the wastewater treatment process, the Taguchi method was used for four input parameters: pH (2, 7, 12), reaction time (10, 30, 50 min), AG 16 concentrations (20, 120, 220 mg/l) and K2FeO4 concentrations (25, 125, 225 mg/l), for which 9 experiments were performed in accordance with the plan adopted. Test result analysis allowed to indicate the optimal values for individual input parameters (pH 2, time = 50 min, AG 16 = 20 mg/l, K2FeO4 = 125 mg/l). Under these conditions, visual discoloration of wastewater was obtained (AG 16 = 0.4 mg/l, ↓98% ), colour removal (66 mg Pt/l, ↓88%) and DOC (249 mg/l, ↓37%).
The assessment of supply chain effectiveness
Authors: Jacyna-Gołda Ilona , Izdebski Mariusz , Szczepański Emilian , Gołda Paweł
Published: July 2018

This paper presents the problem of the assessment of the supply chains in the context of their effectiveness. In this paper the concepts of a supply chain and effectiveness were characterized. The supply chain is a structure of entities which are connected with each other by the use of material and financial flows and functional, structural, technological, economic and information dependencies. Entities such as: suppliers, final recipients, entrepreneurs, warehouse facilities, supply centers, logistics operators, carriers, etc. perform material flows from suppliers to recipients. The concept of efficiency, in general terms, refers to economic rationality and means the relationship between the achieved or expected effects and the expenditures incurred. Additionally, indicators of measuring the effectiveness of the supply chain were described. In order to assess the effectiveness of the supply chain the decision model was developed. Optimization is crucial in decision support systems. The development of an appropriate model for mapping the behavior of a real object or system and formulating an optimization task is a necessary activity in effective management. This is even more important if we want to be competitive. Along with the development of decision support systems, as well as the development of systems for data acquisition on the system functioning, which feed optimization models in ever more detailed form, complex decision models are created that take into account many optimization criteria and require a large amount of data. It allows, however, to ensure the sustainable development of the system and simultaneous implementation of its basic tasks. The main aim of this paper is to present the stages and assumptions of the model for assessing the effectiveness of the supply chain. The main data input, constraints of the model, the criteria functions were determined.
Analysis of Dynamics of Remote-Controlled Artillery-Missile System
Authors: KORUBA Zbigniew , SZMIDT Piotr , GAPIŃSKI Daniel
Published: July 2018

The paper presents physical and mathematical model of the modified remote-controlled the artillery-missile system (AMS) system of the Wróbel II type that is intended to be located on a warship. The proposed system is used for independent detection, tracking and counteracting the means of air attack at short distances. Moreover, principle of operation of SAR is presented and analysis of the system’s dynamics was carried out. The results of investigations are given in a graphical form.
Nowatorski zestaw opatrunkowy „PLEMODS” w systemie szkolenia formacji
Authors: BUKOWIECKA Danuta , NEPELSKI Mariusz , KUCZYŃSKA Ewa , JASTRZĘBSKI Paweł
Published: July 2018

Konsorcjum naukowo-przemysłowe, którego liderem jest Wyższa Szkoła Policji w Szczytnie, realizuje projekt pn. „Zestaw opatrunkowy zabezpieczający urazy powstałe w trakcie pełnienia obowiązków służbowych przez służby mundurowe (PLEMODS)” Nr DOB-BIO6/19/98/2014, współfinansowany ze środków finansowych Narodowego Centrum Badań i Rozwoju. W ramach projektu zostanie wykonany zestaw opatrunkowy zabezpieczający urazy powstałe w trakcie pełnienia obowiązków służbowych przez funkcjonariuszy formacji mundurowych, w tym propozycja systemu szkolenia zapewniająca nabycie umiejętności zastosowania zestawu opatrunkowego,
a także jego płynnego wdrożenia do codziennej służby. Celem artykułu jest prezentacja wyników badań, które uwzględniają analizę istniejących systemów kształcenia
w formacjach bezpieczeństwa i porządku publicznego, wraz z propozycją zmian, które będą warunkowały skuteczne zastosowanie omawianego zestawu opatrunkowego w służbie.
Opracowanie interfejsu wymiany danych między użytkownikiem a samochodem
Authors: PANASIUK Jarosław , PRUSACZYK Piotr
Published: July 2018

Artykuł przedstawia opracowanie interfejsu wymiany danych między użytkownikiem a samochodem. W efektem pracy powstało urządzenie pracujące
w pojeździe autora, spełniające kilka określonych funkcji: Zdalne sterowanie obwodami oświetleniowymi, zdalny odczyt sygnałów pojazdu, zdalne sterowanie zamkiem centralnym. Interakcja z użytkownikiem następuje za pośrednictwem telefonu komórkowego. Do wymiany danych między smartfonem a urządzeniem pracującym w aucie, autor wykorzystał bezprzewodową technologię Bluetooth. Autor wskazuje że funkcjonalność tego systemu w dużej mierze zależała od pojazdu w którym został on zamontowany (rok produkcji 2003). Z pewnością lepsze efekty można by było uzyskać w nowszym samochodzie, wyposażonym w linie szeregowej wymiany danych CAN. W najnowszych samochodach, takie udogodnienia
to niemal standard. Świat motoryzacji zmierza w kierunku stworzenia
i wprowadzenia do sprzedaży w pełni autonomicznego samochodu.
Diagnosis and treatment of Chronic Rhinosinusitis in Children according European Position Paper on Rhinosinusitis and nasal Polyps –EPOS-2012 and American Academy Otolaryngology-Head and Neck Surgery 2014
Authors: Zakrzewska Anna
Published: July 2018

Pediatric rhinosinusitis is defined as a presence of two or more symptoms and one of them should be either nasal blockage or nasal discharge and headache/facial pain or cough. Chronic rhinosinusitis - CRS is recognized when the four most common symptoms as cough, rhinorrhea, nasal congestion and post nasal drip with a slightly higher predominance of chronic cough are presented for more than 12 weeks and influence the quality of life. CRS should be considered in respect of unique conditions because of the differences in predisposing factors (immunological and others) and the anatomy of the sinuses between children and adults. The adenoids are a prominent contributor to CRS in young children, both from bacteriologic and immunologic status. The older children suffer from CRS in the same manner as adults. During evaluation a child with symptoms of CRS , one should always consider the possibility of underlying disease as a contributing factor. Diseases impacting sinuses and nasal function include CF, primary ciliary dyskinesia (PCD) and a variety of normal immune deficiencies, including the still-developing immature immunity of healthy young children. Surgical intervention for rhinosinusitis is usually considered for patients with CRS who have failed maximal pharmacological treatment. There are two important consensus statements for pediatric chronic sinusitis (CRS): European Position papers on Rhinosinusitis and Nasal Polyps -EPOS 2012 and Clinical Consensus Statement: Pediatric Chronic Sinusitis American Academy Otolaryngology-Head Neck Surgery 2014. Both of them contain necessary information and recommendation for diagnosis and treatment of CRS in children.