bluuebunny/crossref_metadata_2025 huggingface dataset:
Methods of Computational Intelligence in the Context of Quality Assurance in Foundry Products
Authors: Rojek G. , Regulski K. , Wilk-Kołodziejczyk D. , Kluska-Nawarecka S. , Jaśkowiec K. , Smolarek-Grzyb A.
Published: June 2016

One way to ensure the required technical characteristics of castings is the strict control of production parameters affecting the quality of the finished products. If the production process is improperly configured, the resulting defects in castings lead to huge losses. Therefore, from the point of view of economics, it is advisable to use the methods of computational intelligence in the field of quality assurance and adjustment of parameters of future production. At the same time, the development of knowledge in the field of metallurgy, aimed to raise the technical level and efficiency of the manufacture of foundry products, should be followed by the development of information systems to support production processes in order to improve their effectiveness and compliance with the increasingly more stringent requirements of ergonomics, occupational safety, environmental protection and quality. This article is a presentation of artificial intelligence methods used in practical applications related to quality assurance. The problem of control of the production process involves the use of tools such as the induction of decision trees, fuzzy logic, rough set theory, artificial neural networks or case-based reasoning.
Analysis of Spent Moulding Sands with Binders of Various Thermal Degradations, in an Aspect of a Possibility of a Directional Mould Degassing
Authors: Łucarz M.
Published: June 2016

The results of investigations of spent moulding sands taken from the mould in which the metal core cooling system - to increase the cooling rate of the ladle casting - was applied, are presented in the hereby paper. The changes of the spent moulding sand at the casting external side being the result of degradation and destruction processes of organic binder, were analysed in this publication. Since the reclaimed material, obtained as a result of the mechanical reclamation of spent sands of the same type, is used as a grain matrix of the moulding sand, the amount of a binder left from the previous technological cycle is essential for the sound castings production. On the bases of investigations of the thermal analysis, ignition losses, dusts contents and pH values of the samples taken from the spent sand the conditions under which the process of gases displacing in the casting mould was realised as well as factors limiting the efficient mould degassing - were considered in this study. The possible reason of a periodical occurrence of an increased number of casting defects due to changing gas volume emission, being the reason of the realised technological process, was indicated.
Effect of Different Variants of Heat Treatment on Mechanical Properties of the AlSi17CuNiMg Alloy
Authors: Jarco A. , Pezda J.
Published: June 2016

Dispersion hardening, as the main heat treatment of silumins having additions of copper and magnesium, results in considerable increase of tensile strength and hardness, with simultaneous decrease of ductility of the alloy. In the paper is presented an attempt of introduction of heat treatment operation consisting in homogenizing treatment prior operation of the dispersion hardening, to minimize negative effects of the T6 heat treatment on plastic properties of hypereutectoidal AlSi17CuNiMg alloy. Tests of the mechanical properties were performed on a test pieces poured in standardized metal moulds. Parameters of different variants of the heat treatment, i.e. temperature and time of soaking for individual operations were selected basing on the ATD (Thermal Derivation Analysis) diagram and analysis of literature. The homogenizing treatment significantly improves ductility of the alloy, resulting in a threefold increase of the elongation and more than fourfold increase of the impact strength in comparison with initial state of the alloy. Moreover, the hardness and the tensile strength (Rm) of the alloy decrease considerably. On the other hand, combination of the homogenizing and dispersion hardening enables increase of elongation with about 40%, and increase of the impact strength with about 25%, comparing with these values after the T6 treatment, maintaining high hardness and slight increase of the tensile strength, comparing with the alloy after the dispersion hardening.
Pressing Speed, Specific Pressure and Mechanical Properties of Aluminium Cast
Authors: Gaspar S. , Pasko J.
Published: June 2016

Recent research in the process of aluminum alloy die castings production, which is nowadays deeply implemented into the rapidly growing automobile, shipping and aircraft industries, is aimed at increasing the useful qualitative properties of the die casting in order to obtain its high mechanical properties at acceptable economic cost. Problem of technological factors of high pressure die casting has been a subject of worldwide research (EU, US, Japan, etc.). The final performance properties of die castings are subjected to a large number of technological factors. The main technological factors of high pressure die casting are as follows: plunger pressing speed, specific (increase) pressure, mold temperature as well as alloy temperature. The contribution discusses the impact of the plunger pressing speed and specific (increase) pressure on the mechanical properties of the casting aluminum alloy.
Hardness and Wear Resistance of TiC-Fe-Cr Locally Reinforcement Produced in Cast Steel
Authors: Olejnik E. , Szymański Ł. , Kurtyka P. , Tokarski T. , Grabowska B. , Czapla P.
Published: June 2016

In order to increase wear resistance cast steel casting the TiC-Fe-Cr type composite zones were fabricated. These zones were obtained by means of in situ synthesis of substrates of the reaction TiC with a moderator of a chemical composition of white cast iron with nickel of the Ni-Hard type 4. The synthesis was carried out directly in the mould cavity. The moderator was applied to control the reactive infiltration occurring during the TiC synthesis. The microstructure of composite zones was investigated by electron scanning microscopy, using the backscattered electron mode. The structure of composite zones was verified by the X-ray diffraction method. The hardness of composite zones, cast steel base alloy and the reference samples such as white chromium cast iron with 14 % Cr and 20 % Cr, manganese cast steel 18 % Mn was measured by Vickers test. The wear resistance of the composite zone and the reference samples examined by ball-on-disc wear test. Dimensionally stable composite zones were obtained containing submicron sizes TiC particles uniformly distributed in the matrix. The macro and microstructure of the composite zone ensured three times hardness increase in comparison to the cast steel base alloy and one and a half times increase in comparison to the white chromium cast iron 20 % Cr. Finally ball-on-disc wear rate of the composite zone was five times lower than chromium white cast iron containing 20 % Cr.
Micro-jet Cooling by Compressed Air after MAG Welding
Authors: Węgrzyn T. , Piwnik J. , Tarasiuk W. , Stanik Z. , Gabrylewski M.
Published: June 2016

The material selected for this investigation was low alloy steel weld metal deposit (WMD) after MAG welding with micro-jet cooling. The present investigation was aimed as the following tasks: analyze impact toughness of WMD in terms of micro-jet cooling parameters. Weld metal deposit (WMD) was first time carried out for MAG welding with micro-jet cooling of compressed air and gas mixture of argon and air. Until that moment only argon, helium and nitrogen and its gas mixture were tested for micro-jet cooling.
Preparation and Characterization of St. John’s Wort Herb Extracts Using Olive, Sunflower and Palm Oils
Authors: Arsić Ivana
Published: June 2016

The aim of the study was to obtain St. John’s wort herb extract (drug:extract ratio 1:5), in a traditional way, using different solvents (sunflower, olive and palm oils) with or without antioxidants (0,02% alpha-tocopherol and 0,01% butylhydroxyanisol). Their characterization was done (organoleptic features, relative density, refractive index, acid number) immediately after the preparation, and during the period of 12 months (the samples were stored at room temperature, 22±2°C).

The type of oil used for the extraction of St. John’s wort herb has a significant influence on organoleptic and physicochemical characteristics of extracts. Oil extracts had approximately the same values for refractive index and relative density as solvents used for extraction. The acid numbers of extracts were slightly higher compared to the used oils. Using the antioxidants for preparing the St. John’s wort oil liquid herb extracts did not change the acid number of extracts made using sunflower and palm oils, while oil extracts made using olive oil and tocopherol or BHA had lower acid number values. During the period of 12 months, only extracts which were made using three different vegetable oils, with the use of antioxidants, showed satisfactory physicochemical, chemical and microbiological stability (with no significant changes in organoleptic properties, relative density, refractive index, acid number value and microbiological safety), which points to the necessity of using antioxidants in the preparation of St. John’s wort oil herb extracts, using the traditional method.
Application of Precision Agriculture Technology in Podlaskie Voivodeship
Authors: Borusiewicz Andrzej , Kapela Krzysztof , Drożyner Paulina , Marczuk Tomasz
Published: June 2016

The objective of the paper was to evaluate the precision agriculture technology on the territory of Podlaskie Voivodeship. Research material consisted of data from the survey carried out in 100 randomly selected farms located in Podlaskie Voivodeship. The concept of “precision agriculture” is known among the surveyed farmers. Based on the research which was carried out, a relation between the surface area of the farm, education and age of respondents was reported. Precision agriculture technology is more popular among farmers who are less than 40 years old, who have higher education and big agricultural farms. Majority of farmers participating in the survey carries out regular research on the soil richness. Moreover, 46% uses in their farms modern technologies for plant production, only 10% uses the system of positioning and 8% of the investigated farms uses the system for guiding agricultural machines, 14% of the investigated farmers uses the system for parallel guiding of a tractor, less than 40% applies the system of variable dosing of fertilizers and plant protection substances. Majority of the investigated farmers claims that new technologies are necessary and they should be applied; however, they indicate too high costs and distribution of farms as the main reason for limitations.
Energy Recovery from Municipal Waste based on Moving Grate Technology
Authors: Cyranka Maciej , Jurczyk Michał
Published: June 2016

The objective of the paper was to analyse possibilities and advantages of energy recovery from municipal solid waste during the thermal treatment in boilers with a moving grate system. The state of the art of Waste-to-Energy (WtE) boilers was investigated mainly by reviewing papers published in scientific journals and at conferences but also by taking into consideration reports from research institutes. The article shows the main aspects that determine the popularity of this type of boilers as well as new solutions which greatly improve the process of thermal treatment of waste. It proves that waste incineration boilers based on the moving grate technology prevail mainly because of its simplicity, reliability and effective energy generation to which special attention was paid. Additionally, the article mentions how WtE boilers are designed and operated to incinerate municipal waste with a great variation in composition with simultaneous notable energy recovery and low environmental impacts. Contemporary development of the Polish WtE infrastructure can be a very important factor influencing the national municipal waste management together with renewable energy and energy efficiency policies.
Geometrical Features of Seeds of New Pumpkin Forms
Authors: Ogrodowska Dorota , Roszkowska Beata , Tańska Małgorzata
Published: June 2016

Plant growers are looking for new crops which would make farms and processing plants more profitable. Currently, in Poland, waste-free pumpkin processing is mainly associated with pumpkin seed production, oil extraction, pulverization of pumpkin oil cake to obtain pumpkin meal, the small-scale use of flesh in food production, but mainly the utilisation of flesh as a feed additive. During technological processes applied for the processing of pumpkin seeds it is important to be familiar with their physical characteristics. The aim of this study was to analyse the geometric characteristics of the seeds of new nine forms of the pumpkin variety Olga, which were bred by researchers from the Department of Plant Genetics, Breeding and Biotechnology at the Warsaw University of Life Sciences. Geometrical features were measured using the Digital Image Analysis (DIA) set, consisting of a digital camera (Nikon DXM 1200), computer and lighting (KAISER RB HF). The following geometrical features were measured: length, width, diameter, perimeter, area, circularity and elongation. Additionally, thickness of the seeds was measured by a calliper. Seeds of the studied forms of hull-less pumpkins differed from the standards in the dimensions and shape, whereas significant differences were demonstrated for the Olga variety standard. The most variable geometric characteristic of the seeds under study was area, while the least variable geometric characteristics of the pumpkin seeds turned out to be the circularity and width.
Clients' Preferences and Development of Organic Food Distribution Channels
Authors: Olech Elżbieta , Kuboń Maciej
Published: June 2016

The objective of the paper was to know preferences of consumers from Małopolskie Voivodeship as a fundamental factor of growth and functioning of distribution channels of organic products. A fast development of the organic products market as well as growing requirements of the society with regard to the quality of sale and form are observed. More and more often consumers pay attention to the source of goods and the form in which the product is offered to them. Research and analyses are a precious source of information for agricultural producers on account of production orientation and the form of sale. It will also facilitate development of existing distribution channels and formation of new ones. Research results indicate that consumers are interested in the purchase of products in small packaging or loose. Sums which they spend on organic food do not exceed PLN 400 per a month.
Effect of Cutting Speed and Depth on the Course of Resultant Force Acting on a Cultivator Tine
Authors: Owsiak Zygmunt , Lejman Krzysztof , Pieczarka Krzysztof , Sekutowski Tomasz
Published: June 2016

The paper presents research results on the effect of cutting depth and speed on the resultant force tilt angle and location of its application point on a flexible tine ended with a cultivator point. The studies were carried out in field conditions in sandy clay with the gravimetric moisture of 11.2% and volumetric density of 1470 kg·m−3. Tines whose flexibility coefficient was 0.0061; 0.0711; 0.0953 and 0.1406 m·kN−1 were used. It was found out that that the resultant force tilt angle raises at the increase of the cutting speed and drops at the increase of depth but this angle and its gradient at the increase of the cutting depth grow along with the decrease of the flexibility coefficient of tines. The increase of the cutting speed and depth causes the decrease of both the distance of the resultant force application point on the tool from the bottom of a furrow and a proportion of this parameter to the cutting depth. The courses of the distance of the resultant force application point on the tool from the bottom of a furrow and courses of proportion of this parameter to the cutting depth as the function of cutting do not differ significantly for tines with higher flexibility coefficients while for the most rigid tine values of these parameters and their gradients are higher. All obtained courses of the analysed values as a function of depth and cutting speed were described with regression equations.
Impact of Coffee Grounds Addition on the Calorific Value of the Selected Biological Materials
Authors: Sołowiej Piotr , Neugebauer Maciej
Published: June 2016

The objective of the paper was, inter alia, to determine the impact of coffee grounds on the heat of combustion of their combination with other biological materials. Research on the heat of combustion and calculations of the calorific value were carried out with the use of a KL-12 Mn calorimeter according to the technical specifications and standards PN-81/G–04513 i PN-ISO 1928:2002. Coffee grounds, tea grounds, pine wood and yellow wheat straw were used in the research. The heat of combustion of particular substrates was determined and then their mixtures with coffee grounds in the following proportion were prepared: 75% substrate – 25% coffee grounds, 50% substrate – 50% coffee grounds, 25% substrate – 75% coffee grounds. Calorific value of particular substrates was increasing with the amount of added coffee grounds. Their biggest flow was reported in the mixture of 50%/50% of coffee grounds and wheat straw and the smallest in case of coffee grounds and wood on account of a similar calorific value of both substrates.
Recent archaeomagnetic studies in Slovakia: Comparison of methodological approaches
Authors: Kubišová Lenka
Published: June 2016

We review the recent archaeomagnetic studies carried out on the territory of Slovakia, focusing on the comparison of methodological approaches, discussing pros and cons of the individual applied methods from the perspective of our experience. The most widely used methods for the determination of intensity and direction of the archaeomegnetic field by demagnetisation of the sample material are the alternating field (AF) demagnetisation and the Thellier double heating method. These methods are used not only for archaeomagnetic studies but also help to solve some geological problems. The two methods were applied to samples collected recently at several sites of Slovakia, where archaeological prospection invoked by earthwork or reconstruction work of developing projects demanded archaeomagnetic dating. Then we discuss advantages and weaknesses of the investigated methods from different perspectives based on several examples and our recent experience.
GPU-based parallel method of temperature field
analysis in a floor heater with a controller
Authors: Forenc Jaroslaw
Published: June 2016

A parallel method enabling acceleration of the
numerical analysis of the transient temperature field in
an air floor heating system is presented in this paper. An
initial-boundary value problem of the heater regulated by
an on/off controller is formulated. The analogue model is
discretized using the implicit finite difference method. The
BiCGStab method is used to compute the obtained system
of equations. A computer program implementing simultaneous
computations on CPUand GPU(GPGPUtechnology)
was developed. CUDA environment and linear algebra libraries
(CUBLAS and CUSPARSE) are used by this program.
The time of computations was reduced eight times
in comparison with a program executed on the CPU only.
Results of computations are presented in the form of time
profiles and temperature field distributions. An influence
of a model of the heat transfer coefficient on the simulation
of the system operation was examined. The physical
interpretation of obtained results is also presented.Results
of computations were verified by comparing them with solutions
obtained with the use of a commercial program -
COMSOL Mutiphysics.
A Energy-Saving Path-Shared Protection Based on Diversity Network Coding for Multi-rate Multicast in WDM Mesh Networks
Authors: Zheng Danling , Lv Lei , Liu Huanlin
Published: June 2016

For improving the survivability and energy saving of multi-rate multicast, a novel energy-saving path-shared protection based on diversity network coding (EPP-DNC) for multi-rate multicast in wavelength division multiplexing (WDM) mesh networks is proposed in the paper. In the EPP-DNC algorithm, diversity network coding on the source node for multi-rate multicast is adopted to reduce the coding energy consumption by avoiding network coding on the network’s intermediate nodes. To decrease the transmission energy, shortest path shared based on heuristic is proposed to transmit the protection information for the request. To provision request’s working paths efficiency, the working paths are routed on the preselected P-cycles with minimum required links and minimum energy consumption. Simulation results show that the proposed EPP-DNC can save energy consumption and improve bandwidth utilization.
Thyroid disorders: diagnosis and therapeutic approaches 2015
Authors: Führer Dagmar
Published: June 2016

This review summarizes recent studies and evidence-based recommendations on management of thyroid disorders, including Graves’ disease and Graves’ orbitopathy, laboratory and clinical issues on hypothyroidism and its treatment, risk assessment of thyroid nodules and novel concepts for risk adapted management of thyroid cancer.
The syntax of Tagalog relative clauses
Authors: Law Paul
Published: June 2016

Four superficially different types of Tagalog relative clauses (head-initial, head-final and internally headed and headless) are argued to have the same D CP underlying structure and derivation. It is suggested that the head noun raises to SpecCP (
Permission and obligation intertwined: The twofold modal meaning of the Finnish jussive from a discourse perspective
Authors: Peltola Rea
Published: June 2016

This article examines the representation of semantic vagueness in discourse as well as the connection between deontic modal meaning and third person reference through the semantics and uses of the Finnish jussive mood. The data used in the analysis come from a collection of newspaper texts and a corpus of dialectal speech. Analyzing jussive forms that give rise to various modal readings, I argue that the two poles of the deontic axis, permission and obligation, are simultaneously present, albeit highlighted to different extents, in the interpretation of a jussive clause. This binary nature of the jussive semantics reveals itself to be a discursive resource: it allows the position of the speaker and other intentional agents to be taken into account in regard to the event that is potentially taking place, thus presenting more than one point of view in the situation. The jussive mood can therefore be regarded as contributing to the dialogical dimension of language.
Limit theorems for the weights and the degrees in anN-interactions random graph model
Authors: Fazekas István , Porvázsnyik Bettina
Published: June 2016

A random graph evolution based on interactions of N vertices is studied. During the evolution both the preferential attachment rule and the uniform choice of vertices are allowed. The weight of an M-clique means the number of its interactions. The asymptotic behaviour of the weight of a fixed M-clique is studied. Asymptotic theorems for the weight and the degree of a fixed vertex are also presented. Moreover, the limits of the maximal weight and the maximal degree are described. The proofs are based on martingale methods.
Towards a Classification of Weak Hand Holds
Authors: Kimmelman Vadim , Sáfár Anna , Crasborn Onno
Published: June 2016

The two symmetrical manual articulators (the hands) in signed languages are a striking modalityspecific
phonetic property. The weak hand can maintain the end position of an articulation while the other
articulator continues to produce additional signs. This weak hand spreading (hold) has been analysed from
various perspectives, highlighting its prosodic, syntactic, or discourse properties. The present study investigates
corpus data from Sign Language of the Netherlands (NGT) and Russian Sign Language (RSL), two unrelated
sign languages, in order to question the necessity of a sign-language specific notion of ‘buoy’ introduced in the
discourse analysis of American Sign Language by Liddell (2003). Buoys are defined as weak hand holds that
serve as a visible landmark throughout a stretch of discourse, and several types are distinguished based on
their function and form. In the analysis of nearly two and a half hours of narratives and conversations from NGT
and RSL, we found over 600 weak hand holds. We show that these holds can be analysed in terms of regular
phonetic, syntactic, semantic, or discourse notions (or a combination thereof) familiar from the linguistic study
of spoken languages, without the need for a sign language-specific notion of ‘buoy’.
Optimizing of vented injection molding on mechanical performance and miscibility of recycled poly(ethylene terephthalate) and polycarbonate blends
Authors: Negoro Takanori , Wongpajan Rutchaneekorn , Thodsaratpreeyakul Wiranphat , Boonlertsamut Jitlada , Thumsorn Supaphorn , Inoya Hiroyuki , Hamada Hiroyuki
Published: June 2016

Blending of recycled poly(ethylene terephthalate) (RPET) and polycarbonate (PC) was performed by melt compounding. The blends were subsequently fabricated to dumbbell specimens by vented injection molding. The mechanical properties, thermal characteristic and morphology of RPET/PC blends were investigated as a function of PC contents. Vented injection molding presented an advantage for superior mechanical properties of RPET/PC blends. The addition of PC enhanced impact strength and fracture toughness with remaining tensile properties. The glass transition temperatures of PET and PC shifted toward each other, which indicated their partial miscibility of RPET and PC in the blends. The toughness mechanism of RPET and PC was related to core-shell structure and good interfacial adhesion at higher contents of PC.
Long-Term Treatment with Low Doses of Methamphetamine Promotes Neuronal Differentiation and Strengthens Long-Term Potentiation of Glutamatergic Synapses onto Dentate Granule Neurons
Authors: Baptista Sofia , Lourenço Joana , Milhazes Nuno , Borges Fernanda , Silva Ana Paula , Bacci Alberto
Published: June 2016

Methamphetamine (METH) is a psychostimulant, affecting hippocampal function with disparate cognitive effects, which depends on the dose and time of administration, ranging from improvement to impairment of memory. Importantly, in the United States, METH is approved for the treatment of attention deficit hyperactivity disorder. Modifications of long-term plasticity of synapses originating from the entorhinal cortex onto dentate granule cells (DGCs) have been proposed to underlie cognitive alterations similar to those seen in METH users. However, the effects of METH on synaptic plasticity of the dentate gyrus are unknown. Here, we investigated the impact of long-term administration of METH (2 mg/kg/d) on neurogenesis and synaptic plasticity of immature and mature DGCs of juvenile mice. We used a mouse model of neurogenesis (the G42 line of GAD67-GFP), in which GFP is expressed by differentiating young DGCs. METH treatment enhanced the differentiation of GFP+cells, as it increased the fraction of GFP+cells expressing the neuronal marker NeuN, and decreased the amount of immature DGCs coexpressing doublecortin. Interestingly, METH did not change the magnitude of long-term potentiation (LTP) in more immature neurons, but facilitated LTP induction in more differentiated GFP+and strengthened plasticity in mature GFP−DGCs. The METH-induced facilitation of LTP in GFP+neurons was accompanied with spine enlargement. Our results reveal a specific action of long-term use of METH in the long-term plasticity of excitatory synapses onto differentiating DGCs and might have important implications toward the understanding of the synaptic basis of METH-induced cognitive alterations.
The other side of progestins: effects in the brain
Authors: Giatti Silvia , Melcangi Roberto Cosimo , Pesaresi Marzia
Published: June 2016

Progestins are a broad class of progestational agents widely differing in their chemical structures and pharmacological properties. Despite emerging data suggest that progestins, besides their action as endometrial protection, can also have multiple nonreproductive functions, much remains to be discovered regarding the actions exerted by these molecules in the nervous system. Here, we report the role exerted by different progestins, currently used for contraception or in postmenopausal hormone replacement therapies, in regulating cognitive functions as well as social behavior and mood. We provide evidence that the effects and mechanisms underlying their actions are still confusing due to the use of different estrogens and progestins as well as different doses, duration of exposure, route of administration, baseline hormonal status and age of treated women. We also discuss the emerging issue concerning the relevant increase of these substances in the environment, able to deeply affect aquatic wildlife as well as to exert a possible influence in humans, which may be exposed to these compounds via contaminated drinking water and seafood. Finally, we report literature data showing the neurobiological action of progestins and in particular their importance during neurodegenerative events. This is extremely interesting, since some of the progestins currently used in clinical practice exert neuroprotective and anti-inflammatory effects in the nervous system, opening new promising opportunities for the use of these molecules as therapeutic agents for trauma and neurodegenerative disorders.
MFGE8 regulates TGF-β-induced epithelial mesenchymal transition in endometrial epithelial cells in vitro
Authors: Yu Liang , Hu Rong , Sullivan Claretta , Swanson R James , Oehninger Sergio , Sun Ying-Pu , Bocca Silvina
Published: June 2016

This study investigated the role of milk fat globule-epidermal growth factor-factor 8 (MFGE8) in TGF-β-induced epithelial–mesenchymal transition (EMT) of endometrial epithelial cells. These were in vitro studies using human endometrial epithelial cells and mouse blastocysts. We investigated the ability of TGF-β to induce EMT in endometrial epithelial cells (HEC-1A) by assessment of cytological phenotype (by light and atomic force microscopy), changes in expression of the markers of cell adhesion/differentiation E- and N-cadherin, and of the transcription factor Snail (by immunofluorescence and immunoblotting), and competence to support embryo attachment in a mouse blastocyst outgrowth assay. We also studied the effects of E-cadherin expression in cells transfected by retroviral shRNA vectors specifically silencing MFGE8. Results demonstrated that TGF-β induced EMT as demonstrated by phenotypic cell changes, by a switch of cadherin expression as well as by upregulation of the expression of the mesenchymal markers Snail and Vimentin. Upon MFGE8 knockdown, these processes were interfered with, suggesting that MFGE8 and TGF-β together may participate in regulation of EMT. This study demonstrated for the first time that endometrial MFGE8 modulates TGF-β-induced EMT in human endometrium cells.
La deificación del dinero en contravía de la integridad de la profesión contable
Authors: Guarnizo Nataly Gualtero
Published: June 2016

Ante la desdicha que ocasionan los escándalos en los que la contaduría pública termina inmiscuida, este documento plantea una serie de críticas sobre la preponderancia que el dinero ha tenido en las acciones contables, lo cual va en detrimento de la integridad del contador público. Es una invitación para el cambio y para reencontrar la pasión por la profesión contable, a partir de un clamor poético.
Caracterización del concepto de contabilidad simplificada en España y Colombia
Authors: Católico Segura Diego Fernando , Gómez Meneses Fabio Enrique
Published: June 2016

En el presente documento se analizará el concepto de contabilidad simplificada en España y Colombia, identificado su génesis, características y el tipo de organizaciones para las cuales puede resultar útil; organizaciones que corresponden principalmente a las micro, pequeñas y medianas empresas. Todo lo anterior, en el contexto del proceso actual de estandarización contable internacional por el que atraviesa nuestro país con ocasión de lo estipulado en la Ley 1314 de 2009. En el artículo se tienen en cuenta las ventajas y desventajas que dicho proceso supone y las particularidades de las organizaciones en las cuales se pretenda utilizar dicho sistema.
El conocimiento pedagógico fundamentado en una epistemología de los sistemas complejos y una metodología hermenéutica
Authors: Marin Gallego Jose Duvan
Published: June 2016

La investigación de esta disertación doctoral tiene un enfoque cualitativo,por cuanto las fuentes básicas son escritos documentales sobre epistemologíay metodología de la investigación en ciencias sociales y humanasque se trasladan al campo de la pedagogía. Mediante la formulación delproblema como una hipótesis abductiva que tiene una función heurística yno de contrastación o verificación, se demuestra que el fundamento parainvestigar la pedagogía se halla en una nueva concepción epistemológicade los “sistemas complejos”, y que el fundamento metodológico debe serde enfoque interpretativo o hermenéutico.El propósito principal de esta tesis de doctorado en Educación es el de hacerun aporte alternativo en la investigación de la pedagogía que sustituya lasformas tradicionales de producción de conocimiento científico basadas en losparadigmas de corte positivista, sobre todo, en las disciplinas del currículo, ladidáctica, la evaluación y la gestión educativa, que son los núcleos básicosde la pedagogía.
Una mirada a la cátedra de estudios afrocolombianos a partir de las reflexiones de los líderes de la Red Elegguá en la ciudad de Bogotá
Authors: Sotelo Manrique Ana Cristina
Published: June 2016

A partir del análisis etnometodológico sobre las identidades configuradas por maestros e investigadores de la Cátedra de Estudios Afrocolombianos en la ciudad de Bogotá pertenecientes a la red Elegguá, se aborda una reflexión que se desprende de la crítica de esta red al proceso que bajo un supuesto multiculturalismo alberga un racismo sistemático naturalizado y transversal al orden social colombiano; así mismo se argumenta que uno de los factores que ha legitimado dicho proceso está ligado al Sistema Educativo Nacional encargado de su reproducción. Es decir, se sitúa el debate en la exigencia de cuestionar la educación tradicional del país anclada a la historia oficial y concepto de mestizaje, elementos que conforman los intereses monoculturales del proyecto de Estado Nación colombiano y que han impedido la implementación real de los reconocimientos étnicos de la constitución vigente. En este sentido la historicidad en esta investigación permitió mirar críticamente el lugar en el que permanecen los grupos subalternos, por lo que el abordaje teórico presenta una discusión frente a los límites culturales objetivos del esencialismo y constructivismo como posturas que no están lejos de las construcciones hegemónicas del Estado Nación.
Educación ambiental en el marco de una estrategia participativa para atender el cambio climático a nivel local: Experiencias en Costa Rica
Authors: Valerio-Hernández Vanessa , Arguedas-Quirós Sonia , Aguilar-Arguedas Alina
Published: June 2016

En el tema de cambio climático, en cuanto al país, Costa Rica ha avanzado en la definición de políticas públicas, mecanismos financieros, incentivos de mercado y otros temas en los sectores considerados prioritarios en relación con la generación de emisiones de gases efecto invernadero. Localmente, se han realizado esfuerzos importantes, pero aún existen vacíos en el abordaje del tema. Los espacios locales resultan importantes, pues es ahí donde se suman los esfuerzos para operativizar las políticas y las acciones planteadas a nivel nacional y global. El objetivo de este trabajo fue sistematizar los resultados de un proceso de educación ambiental en tres experiencias locales en donde se ha trabajado una estrategia de cambio climático a nivel local en Costa Rica. Se detalla el abordaje metodológico y los resultados por modalidad de educación ambiental a través de cuatros años de relaciones con proyectos de gestión y educación ambiental. La principal conclusión es que la educación ambiental en las diferentes modalidades es complementaria, y constituye un eje clave para trabajar el tema de cambio climático a nivel local, donde las comunidades y los actores sociales ambientalmente educados pueden convertirse en sujetos del desarrollo, participantes en la toma de decisiones, y en la definición de políticas públicas para su territorio.
La optimización del proceso productivo de centros gastronómicos mediante ecoeficiencia: Estudio del restaurante La Turrialbeña, Costa Rica
Authors: Vaughn-Gómez Elizabeth , Vetrani-Chavarría Karla , Murrell-Blanco Manfred , Bermúdez-Hidalgo Ligia
Published: June 2016

En el presente estudio se establecieron medidas para optimizar el proceso productivo para centros gastronómicos utilizando medidas ecoeficientes, las cuales se identificaron para el restaurante La Turrialbeña ubicado en Moín, Limón. Las áreas abarcadas fueron el manejo de agua, energía y residuos sólidos.  En la primera fase se realizó un diagnóstico del local para establecer la línea base. En la segunda fase se identificaron las medidas ecoeficientes que podían ser implementadas y, por último, se realizó un estudio de factibilidad económica, técnica y ambiental de estas, con el propósito de conocer la viabilidad de cada una para su implementación futura. Como resultado del proyecto se  determinó que en términos energéticos la reparación del sistema eléctrico existente era prioritaria para optimizar el consumo de energía, el cual se verá impactado positivamente mediante la implementación de paneles solares. En cuanto al recurso hídrico, la recuperación de agua pluvial para uso del restaurante es viable, así como la implementación de un plan de reciclaje para los residuos sólidos del centro gastronómico. Estas acciones mejorarán el proceso productivo del local, su imagen y su impacto ambiental.
Propuesta de plan de acciones para alcanzar la carbono-neutralidad en la Cruz Roja Costarricense del Comité Auxiliar en San Vito
Authors: Gómez-Céspedes Jairo , Murrell-Blanco Manfred , Vetrani-Chavarría Karla , Bermúdez-Hidalgo Ligia
Published: June 2016

Dentro del contexto de la Estrategia Carbono Neutralidad de Costa Rica, en este estudio se llevó a cabo un inventario de gases efecto invernadero (GEI),se analizaron los requisitos e hicieron recomendaciones necesarias para que el Comité Auxiliar de San Vito de Coto Brus de la Cruz Roja Costarricense diagnostique su posibilidad de convertirse en una organización carbono neutral. Se recopiló información sobre opciones de certificación C-Neutral a nivel nacional. Se tomaron en cuenta las certificaciones INTE/ISO 14064:2006 e INTE/ISO 12-01-06:2011 como referencia para la elaboración del inventario GEI y las recomendaciones para implementación del sistema de gestión de C-Neutro, respectivamente. El inventario se realizó tomando como año base la operación del comité en el 2014. Como resultado del inventario se identificaron las fuentes de GEI y se cuantificó su emisión, según los factores nacionales e internacionales; el total de emisiones se cuantificó en 77,4 toneladas de carbono equivalente (tCO2e), provenientes principalmente de fuentes de combustión de hidrocarburos (flotilla vehicular). También se elaboró un plantilla con las ecuaciones estequiométricas para futuras mediciones de GEI y una matriz de cumplimiento de requisitos y recomendaciones para la eventual certificación del sistema de C-Neutro, de manera que funcione para cualquiera de los comités de Cruz Roja en Costa Rica.
BMI-for-Age and Weight-for-Length in Children 0 to 2 Years
Authors: Furlong Kayla R. , Anderson Laura N. , Kang Huiying , Lebovic Gerald , Parkin Patricia C. , Maguire Jonathon L. , O’Connor Deborah L. , Birken Catherine S. ,   on behalf of the TARGet Kids! Collaboration
Published: June 2016

OBJECTIVES:

To determine the agreement between weight-for-length and BMI-for-age in children 0 to <2 years by using research-collected data, examine factors that may affect agreement, and determine if agreement differs between research- and routinely collected data.

METHODS:

Cross-sectional data on healthy, term-born children (n = 1632) aged 0 to <2 years attending the TARGet Kids! practice-based research network in Toronto, Canada (December 2008–October 2014) were collected. Multiple visits for each child were included. Length (cm) and weight (kg) measurements were obtained by trained research assistants during research visits, and by nonresearch staff during all other visits. BMI-for-age z-scores were compared with weight-for-length z-scores (the criterion measure).

RESULTS:

The correlation between weight-for-length and BMI-for-age was strong (r = 0.986, P < .0001) and Bland-Altman plots revealed good agreement (difference = −0.08, SD = 0.20, P = .91). A small proportion (6.3%) of observations were misclassified and most misclassifications occurred near the percentile cutoffs. There were no differences by age and sex. Agreement was similar between research- and routinely collected data (r = 0.99, P < .001; mean difference −0.84, SD = 0.20, P = .67).

CONCLUSIONS:

Weight-for-length and BMI-for-age demonstrated high agreement with low misclassification. BMI-for-age may be an appropriate indicator of growth in the first 2 years of life and has the potential to be used from birth to adulthood. Additional investigation is needed to determine if BMI-for-age in children <2 years is associated with future health outcomes.
Internalismo e justificação epistêmica não inferencial
Authors: Etcheverry Kátia
Published: June 2016

Este artigo tem como foco a dura tarefa epistemológica que cabe ao fundacionalismo internalista, no que diz respeito às condições internalistas para a justificação (sobretudo a exigência de acesso cognitivo aos fatores que contribuem para a justificação da crença), quando os seus defensores tentam explicar de que maneira crenças básicas podem ser não inferencialmente justificadas com base na experiência. Michael Huemer recentemente ofereceu uma teoria, o Conservadorismo Fenomênico (CF), que ele alega ser a teoria da justificação fundacional mais bem sucedida entre as teorias da justificação internalista. A partir da comparação e do contraste entre a posição assumida por Huemer e as teorias da justificação não inferencial que oferecem uma explicação cuja noção central é a relação de contato cognitivo direto (acquaintance), tentarei expor as fragilidades de (CF), bem como sugerir que a sua única saída seria aceitar que a base epistêmica última de crenças empíricas está na relação de contato cognitivo direto, porque por detrás das “aparências” (seemings) há um contato cognitivo direto. Mas, ao assim fazer, (CF) não mais se distinguiria de teorias do contato cognitivo direto.
Crenças “gettierizadas” e conhecimento procedimental
Authors: Rodrigues Luis Estevinha
Published: June 2016

Defendo que a gettierização de crenças práticas candidatas a conhecimento procedimental e a gettierização de crenças proposicionais candidatas a conhecimento proposicional produzem diferentes consequências. Contra o intelectualismo genérico, argumento que essa diferença implica que o conhecimento procedimental não é conhecimento proposicional, nem a esse pode ser reduzido.
A autoridade epistêmica do testemunho
Authors: Sartori Carlos Augusto
Published: June 2016

Muito do que conhecemos deriva do relato de outras pessoas. Nem todo relato, entretanto, é apto para produzir crenças justificadas. O que se pretende neste paper é analisar as condições que devem ser satisfeitas para que um testemunho possa produzir crenças justificadas e, a partir daí, conhecimento. Assumindo uma posição não reducionista do testemunho, segue-se a contribuição de Robert Audi para concluir que o testemunho é fonte legítima de justificação e de conhecimento, argumentando que a confiança que se tem nos outros pode, em circunstâncias adequadas, satisfazer as condições para a justificação e para o conhecimento.
El conocimiento grupal de agentes epistémicamente responsables
Authors: Cresto Eleonora
Published: June 2016

Este trabajo examina el concepto de conocimiento grupal. Por un lado, se observa que a menudo nos vemos compelidos a atribuir a los agentes grupales actitudes epistémicas que difieren de las de sus miembros individuales; por otro lado, también notamos que los agentes idealmente responsables están sometidos a una “presión deflacionaria” para anclar tales actitudes en individuos concretos. En vistas de ello, argumento que los grupos epistémicamente esponsables deben concebirse como entidades dinámicas; de anera correlativa, el conocimiento grupal puede definirse en érminos de una familia de posibles rutas entre el onocimiento distribuido y el conocimiento común del grupo. Muestro ntonces que las Lógicas de Anuncios Públicos pueden usarse en este contexto como herramientas adecuadas para monitorear la satisfacción de requerimientos normativos por parte de individuos epistémicamente responsables.
Self-Knowledge and Epistemic Virtues: between Reliabilism and Responsibilism
Authors: Santos César Schirmer
Published: June 2016

This paper is about the role of self-knowledge in the cognitive life of a virtuous knower. The main idea is that it is hard to know ourselves because introspection is an unreliable epistemic source, and reason can be a source of insidious forms of self-deception. Nevertheless, our epistemic situation is such that an epistemically responsible agent must be constantly looking for a better understanding of her own character traits and beliefs, under the risk of jeopardizing her own status as a knower, ruining her own intellectual life.
Kant sobre a vontade: a influência luterana
Authors: Klaudat André Nilo
Published: June 2016

A vontade racional (e a sua atividade como vontade pura) é a faculdade investigada por Kant na sua Metafísica dos costumes. Neste artigo, procuro esclarecer a concepção que Kant tem dessa faculdade, isto é, como um poder causal constituído por uma norma. Para tanto, são analisados três textos-chave de Kant. A comparação com a posição luterana sobre a concupiscência sugere uma forte influência dessa posição sobre a concepção kantiana da vontade.
Asymptotic stability of solutions for a class of nonlinear functional integral equations of fractional order
Authors: Çakan Ümit , Özdemir İsmet
Published: June 2016

In this paper, using a Darbo type fixed point theorem associated with the measure of noncompactness we prove a theorem on the existence of asymptotically stable solutions of some nonlinear functional integral equations in the space of continuous and bounded functions on R+ = [0,∞). We also give some examples satisfying the conditions our existence theorem.
PRODUÇÃO DE MOLIBDÊNIO METÁLICO A PARTIR DA MOLIBDENITA DE CARNAÍBA (BAHIA)
Authors: Souza Ana Carolina de , De Andrade Lima Luiz Rogerio Pinho
Published: June 2016

O Brasil não tem reservas oficiais de molibdênio, assim a produção informal do concentrado de molibdenita da atividade garimpeira de Carnaíba é uma alternativa para a demanda do mercado nacional. Neste trabalho a molibdenita de Carnaíba foi usada para a produção de molibdênio metálico usando ustulação, lixiviação com NH4OH, precipitação e redução com hidrogênio. Os cristais da molibdenita têm 38% de molibdênio e aproximadamente 10% de micas. Após a lixiviação com NH4OH houve uma extração de aproximadamente 90% Mo. O óxido de molibdênio formado após o aquecimento dos molibdatos tiveram boa cristalinidade. O molibdênio metálico obtido após a redução com hidrogênio apresentou uma estrutura porosa e um teor de 99% de Mo. O  rendimento global do processo é de 85%.