bluuebunny/crossref_metadata_2025 huggingface dataset:
The application of smart cities concept for citizens of Lithuania and Sweden: comperative analysis
Authors: Dudzevičiūtė Gitana , Šimelytė Agnė , Liučvaitienė Aušra
Published: December 2017

Urbanization and expansion of cities requires new tools to improve the quality of life of city inhabitants for all areas from mobility to leisure activities. Thus, technological development and digitalisation have been introduced into infrastructures such as rails, roads, airports, bridges, tunnels and communications. Policy of smart cities concept focuses on economy, people, mobility, governance, environment, and living. Even more, implemented framework of smart cities stimulates sustainable economic development. Smart economy is a trigger for innovations and entrepreneurship. Installed measures of smart mobility reduce traffic jams and optimise transportation systems.This research attempts to assess and compare largest different cities of Lithuania and Sweden in the context of smart cities’ concept. Due to the shortage and mismatching statistical information, the paper is limited with only four following indicators: smart economy, smart mobility, smart environment, and smart governance. The analysis of indicators shows that Lithuanian major cities in all groups of criterion are below average while values of indicators in the case of Swedish major cities are much higher than average.
International Market Entry Strategies: Relational, Digital, and Hybrid Approaches
Authors: Watson George F. , Weaven Scott , Perkins Helen , Sardana Deepak , Palmatier Robert W.
Published: December 2017

The adoption of digital communications, facilitated by Internet technology, has been among the most significant international business developments of the past 25 years. This article investigates the effect of these new technologies and the changing global business environment to understand how relational approaches to international market entry (IME) are changing in light of macro developments. Despite substantial resources in business practice dedicated to combining relational strategies in digital settings, this analysis of extant literature reveals that fewer than 3% of peer-reviewed research articles in the international marketing domain examine digital contexts. To address this gap, the authors assess 25 years of literature to provide (1) a description of the evolution of IME research; (2) a review and synthesis of pertinent literature that adopts relational, digital, and hybrid approaches to IME; (3) a taxonomy of IME strategies; and (4) directions for further research.
The Effect of Review Writing on Learning Engagement in Channel Partner Relationship Management
Authors: Aguirre Elizabeth , Mahr Dominik , de Ruyter Ko , Grewal Dhruv , Pelser Jan , Wetzels Martin
Published: December 2017

To develop the knowledge and skill sets of channel partner firms, manufacturers increasingly introduce learning programs as part of their relationship management strategies. However, the engagement of channel partners in these programs tends to be low. The current research, conducted in collaboration with a Fortune 100 information technology company, examines ways to strengthen learning engagement. In accordance with self-regulated learning theory, the authors propose and demonstrate that when channel partners write reviews of a learning module that they attended, beyond providing ratings, they are better able to reflect on the relevance of their learning experience and are further engaged in learning activities. The audience and focus of these written reviews determine the engagement of the channel partner sales personnel; therefore, review writing is a valuable, informal mechanism to motivate them. These effects are moderated by characteristics of both the channel partner (salesperson's learning orientation and identification with the manufacturer) and the relationship with the manufacturer (length and exclusivity).
Toward an Optimal Donation Solicitation: Evidence from the Field of the Differential Influence of Donor-Related and Organization-Related Information on Donation Choice and Amount
Authors: Fajardo Tatiana M. , Townsend Claudia , Bolander Willy
Published: December 2017

The present research decomposes consumer donation behavior into two components: donation choice (i.e., whether to donate) and donation amount (i.e., how much to donate). It then considers how information related to the donor and information related to characteristics of the soliciting organization may differentially influence the two decisions. Results from four field experiments suggest that donor-related appeals have a greater effect on the donation choice decision (vs. organization-related appeals), whereas organization-related appeals have a greater effect on the donation amount decision (vs. donor-related appeals). This might lead one to conclude that presenting both types of appeals in a solicitation is ideal. However, the studies presented herein also suggest that this strategy may backfire. The simultaneous presentation of donor- and organization-related appeals can hamper both donation response rates and average contribution amounts. To address this issue, the authors identify and test an alternative solicitation strategy for maximizing solicitation effectiveness. This strategy involves a multistep request process that capitalizes on an understanding of the differential influence of donor- and organization-related information on donation choice and amount decisions.
Share Repurchases and Myopia: Implications on the Stock and Consumer Markets
Authors: Bendig David , Willmann Daniel , Strese Steffen , Brettel Malte
Published: December 2017

Investor demand has promoted share repurchases to the dominating payout instrument for U.S. firms. However, critics worry that the repurchase boom leads to firms neglecting long-term investments. Even worse, scholars have shown that investor pressure also motivates firms to cut marketing investments with the aim of boosting short-term income, a practice called myopic marketing management. Extant theory still lacks an understanding of whether and how the co-occurrence of share repurchases and myopic marketing affects firm stakeholders such as investors and consumers. Using a large-scale cross-industry sample, the authors reveal that there is a higher share of firms cutting marketing investments among repurchasing firms than among nonrepurchasing firms. Furthermore, investors immediately respond negatively to myopic firms that also repurchase shares. Finally, repurchases and myopic marketing are also associated with an increase in product recalls. This first study to assess share repurchases through a marketing lens hence reveals negative effects on both the stock and the consumer markets.
Converging on a New Theoretical Foundation for Selling
Authors: Hartmann Nathaniel N. , Wieland Heiko , Vargo Stephen L.
Published: December 2017

This article demonstrates that the sales literature is converging on a systemic and institutional perspective that recognizes that selling and value creation unfold over time and are embedded in broader social systems. This convergence illustrates that selling needs a more robust theoretical foundation. To contribute to this foundation, the authors draw on institutional theory and service-dominant logic to advance a service ecosystems perspective. This perspective leads them to redefine selling in terms of the interaction between actors aimed at creating and maintaining thin crossing points—the locations at which service can be efficiently exchanged for service—through the ongoing alignment of institutional arrangements and the optimization of relationships. This definition underscores how broad sets of human actors engage in selling processes, regardless of the roles that characterize them (e.g., firm, customer, stakeholder). A service ecosystems perspective reveals (1) that selling continues to be an essential activity, (2) how broader sets of actors participate in selling processes, and (3) how this participation may be changing. It leads to novel insights and questions regarding gaining and maintaining business, managing intrafirm and broad external selling actors, and sales performance.
The Club Store Effect: Impact of Shopping in Warehouse Club Stores on Consumers' Packaged Food Purchases
Authors: Ailawadi Kusum L. , Ma Yu , Grewal Dhruv
Published: December 2017

This article studies the impact of shopping at the warehouse club format on households' purchases of packaged food for the home. In addition to low prices, this format has several unique characteristics that can influence packaged food purchases. The empirical analysis uses a combination of households' longitudinal grocery purchase information, rich survey data, and detailed item-level nutrition information. After accounting for selection on observables and unobservables, the authors find a substantial increase in the total quantity (servings per capita) of packaged food purchases attributable to shopping at this format. Because there is no effect on the nutritional quality of purchases, this translates into a substantial increase in calories, sugar, and saturated fat per capita. The increase comes primarily from storable and impulse foods, and it is drawn equally from foods that have positive and negative health halos. The results have important implications for how marketers can create win–win opportunities for themselves and for consumers.
The Impact of Death-Related Media Information on Consumer Value Orientation and Scope Sensitivity
Authors: Huang Zhongqiang (Tak) , Huang Xun (Irene) , Jiang Yuwei
Published: December 2017

This research examines how incidental exposure to death-related information in the media affects consumers’ value orientation and scope sensitivity to marketing stimuli. Five studies demonstrate that, in contrast to thoughts about one's own mortality, exposure to death-related information in the media can shift consumers’ focus from extrinsic to intrinsic values. This leads them to pay less attention to the marketing stimuli, which are generally associated with extrinsic values, and consequently results in lower sensitivity to the magnitude of products and services. These effects are reversed when the marketing stimuli are associated with intrinsic values. Moreover, we found that exposure to death-related media information will generate effects similar to those of mortality salience when the information is perceived to be self-relevant and thus could induce death anxiety. The authors discuss implications and possible extensions.
Entre el discurso historiográfico y la ficción literaria: la “Reconquista” o la denominación de un tópico literario
Authors: Porcel Bueno David
Published: December 2017

A mediados del siglo XVIII, en una refutación metódica de la
De los testimonios de presos al cuento policial: préstamos entre prensa y literatura (1933)
Authors: de los Ángeles Mascioto María
Published: December 2017

Este trabajo propone analizar un doble juego de intersecciones y préstamos entre el periodismo y la literatura: el cuento “Hombres de las orillas” (1933) de Jorge Luis Borges, publicado en la
The role of corticosteroid-binding globulin in the evaluation of adrenal insufficiency
Authors: Verbeeten Kate C. , Ahmet Alexandra H.
Published: December 2017

Cortisol is a hydrophobic molecule that is largely bound to corticosteroid-binding globulin (CBG) in the circulation. In the assessment of adrenal insufficiency, many clinicians measure a total serum cortisol level, which assumes that CBG is present in normal concentrations and with a normal binding affinity for cortisol. CBG concentration and affinity are affected by a number of common factors including oral contraceptive pills (OCPs), fever and infection, as well as rare mutations in the serine protease inhibitor A6 (SERPINA6) gene, and as such, total cortisol levels might not be the ideal way to assess adrenal function in all clinical circumstances. This paper reviews the limitations of immunoassay and liquid chromatography-tandem mass spectrometry (LC-MS/MS) in the measurement of total cortisol, the challenges of measuring free serum cortisol directly as well as the difficulties in calculating an estimated free cortisol from total cortisol, CBG and albumin concentrations. Newer approaches to the evaluation of adrenal insufficiency, including the measurement of cortisol and cortisone in the saliva, are discussed and a possible future role for these tests is proposed.
Reluctant to Reform? A Note on Risk-Loving Politicians and Bureaucrats
Authors: Thomas Tobias , Heß Moritz , Wagner Gert G.
Published: December 2017

From a political economy perspective, politicians often fail to implement structural reforms. In this contribution we investigate if the resistance to reform is based on the differences in the risk preferences of voters, politicians, and bureaucrats. Based on three surveys among the German electorate, 175 members of the Federal German Parliament and 106 officials from German ministries, this is not the case. Since both politicians and bureaucrats have a higher risk appetite than the voters, their risk preferences cannot be seen as an explanation for the resistance to structural reform. Hence, it must be caused by other reasons. These could be interventions by veto players, wars of attrition by powerful interest groups, or reform logjams initiated. However, as during times of populist campaigns, the election process can put forth candidates with very high risk appetites, the constitutions of democracies turn out to be rather effective if hazardous actions and measures by political rookies and gamblers are inhibited by checks and balances.
Beauty and Ugliness of Aggregation over Time: A Survey
Authors: Mamingi Nlandu
Published: December 2017

This paper delivers an up-to-date literature review dealing with aggregation over time of economic time series, e.g. the transformation of high-frequency data to low frequency data, with a focus on its benefits (the beauty) and its costs (the ugliness). While there are some benefits associated with aggregating data over time, the negative effects are numerous. Aggregation over time is shown to have implications for inferences, public policy and forecasting.
The Doctrine of Original Sin Amongst Augustine’s African Contemporaries: The Case of Evodius of Uzalis’ De fide contra Manichaeos
Authors: Vanspauwen Aäron , Dupont Anthony
Published: December 2017

Is Augustine’s doctrine of original sin to be considered as typical African? This question plays an important role in recent debates in Augustinian scholarship. In order to answer this question, one has to carefully study the writings of African authors prior, contemporary, and subsequent to Augustine, and compare them with their peers outside of Africa. The current article intends to contribute to this discussion by evaluating the possible presence of an Augustinian notion of original sin in Evodius of Uzalis’
Revelation 20:12–15: Augustine on the “book of life,” and the conflicting picture of predestination in De civitate dei 20,14–15
Authors: Pârvan Alexandra
Published: December 2017

The article examines how Augustine’s interpretation of the “book of life” (
The Greek Version(s) of Augustine’s De gestis Pelagii
Authors: Malavasi Giulio
Published: December 2017

In this article, the known evidence of the Greek translation of Augustine’s
Fragmentation Evolution and Fractal Characteristics of Deep Rocks by Lab Compression-Shear Tests
Authors: Zhu Shuyun , Wu Yun , Lu Liangliang
Published: December 2017

We studied the fragmentation evolution and fractal characteristics of deep coalbed rocks that were subjected to underground pressure. First, 14 rock samples of three lithologic groups were collected from the lower coalbed floor at the first working face in Daizhuang Coal Mine and subjected to a series of laboratory compression-shear tests at variable angles on a WES-D3000 universal electro-hydraulic servo testing machine. Then, based on the Mohr–Coulomb failure criterion and the experimental setup specifics, we theoretically explained the testing principle and determined the linear regression relations between the shear stress and normal stress of rock samples in the three groups. Last, we classified fractured fragments by their shapes, established the relationships between the fractal dimensions and their volumes according to fractal theory, and studied the fragmentation distribution and their fractal characteristics. The results show that (1) the variable angles of the curves of rock load versus load displacement obtained in the compression-shear tests are similar to those of the curves of stress versus strain obtained in the servo-controlled permeability tests; (2) the fractal dimension gradually decreases when the rock shear angle increases; (3) among the three lithologic groups, limestone has the smallest average fractal dimensions, which indicates that it has the highest strength to resist shear failure; (4) there is an obvious negative correlation between the fractal dimensions and the percentage of fragments >10 g, which can be used as an important evaluation index of rock brittleness; and (5) the higher the fractal dimension is, the easier the rock fragmentates or fails.
Experimental Study on Dynamic Strength Improvement Mechanism of Concrete Materials
Authors: Lei Dong , He Jintao , Zhu Feipeng , Bai Pengxiang
Published: December 2017

This research mainly investigates the dynamic strength improvement mechanism of concrete materials based on two aspects: the time lapse of strain and the crack development modes. Based on the contrastive experiments on axial compression and flexural-tensile tests, the load-deflection curves under quasi-static load and dynamic load were obtained. Consequently, the stress-strain curves of concrete materials were available. Therefore, the fracture energy of the specimen was calculated through numerical integration of the load-deflection curves. The strain response under dynamic load is significantly less than that under quasi-static load at the same stress level. The time lapse of strain exists and is more significant as the stress level increases. The analysis of micropattern morphology on crack development under dynamic load shows that there is not enough time for microcracks to independently select the next weakest part for further propagation. Therefore, some cracks go through the aggregate, and more energy is required for the crack development, thus leading to an improvement of dynamic failure strength.
A Novel Triaxial Test System for Concrete under Passive Confinement
Authors: Jiang Jiafei , Xiao Pingcheng , Li Benben
Published: December 2017

Triaxial testing data are essential for developing the general mechanical model for concrete subject to multi-axial stress. Due to the lack of a test system associated with passive confinement, a novel triaxial test system was designed for a 100 mm by 100 mm by 100 mm cube and verified through testing. The system comprises a uniaxial compression testing machine and a biaxial loading apparatus. The main feature of this system is exerting a detectable passive load in two perpendicular directions. The passive load is the load linearly increased with the expansion of the cube in the same direction of the load, such as fiber reinforced polymer (FRP) confinement. Key issues such as the confinement stiffness ratios, friction reduction pad, and deformation data acquisition and correction have been demonstrated in this paper. A group of concrete cubes are designed to be tested in the system and compared with FRP-confined standard cylinders to verify the feasibility of the new test system.
State-Based Delay Representation and Its Transfer from a Game of Pong to Reaching and Tracking
Authors: Avraham Guy , Leib Raz , Pressman Assaf , Simo Lucia S. , Karniel Amir , Shmuelof Lior , Mussa-Ivaldi Ferdinando A. , Nisky Ilana
Published: December 2017

To accurately estimate the state of the body, the nervous system needs to account for delays between signals from different sensory modalities. To investigate how such delays may be represented in the sensorimotor system, we asked human participants to play a virtual pong game in which the movement of the virtual paddle was delayed with respect to their hand movement. We tested the representation of this new mapping between the hand and the delayed paddle by examining transfer of adaptation to blind reaching and blind tracking tasks. These blind tasks enabled to capture the representation in feedforward mechanisms of movement control. A Time Representation of the delay is an estimation of the actual time lag between hand and paddle movements. A State Representation is a representation of delay using current state variables: the distance between the paddle and the ball originating from the delay may be considered as a spatial shift; the low sensitivity in the response of the paddle may be interpreted as a minifying gain; and the lag may be attributed to a mechanical resistance that influences paddle’s movement. We found that the effects of prolonged exposure to the delayed feedback transferred to blind reaching and tracking tasks and caused participants to exhibit hypermetric movements. These results, together with simulations of our representation models, suggest that delay is not represented based on time, but rather as a spatial gain change in visuomotor mapping.
Unsupervised Network Analysis of the Plastic Supraoptic Nucleus Transcriptome Predicts Caprin2 Regulatory Interactions
Authors: Loh Su-Yi , Jahans-Price Thomas , Greenwood Michael P. , Greenwood Mingkwan , Hoe See-Ziau , Konopacka Agnieszka , Campbell Colin , Murphy David , Hindmarch Charles C. T.
Published: December 2017

The supraoptic nucleus (SON) is a group of neurons in the hypothalamus responsible for the synthesis and secretion of the peptide hormones vasopressin and oxytocin. Following physiological cues, such as dehydration, salt-loading and lactation, the SON undergoes a function related plasticity that we have previously described in the rat at the transcriptome level. Using the unsupervised graphical lasso (Glasso) algorithm, we reconstructed a putative network from 500 plastic SON genes in which genes are the nodes and the edges are the inferred interactions. The most active nodal gene identified within the network wasCaprin2.Caprin2encodes an RNA-binding protein that we have previously shown to be vital for the functioning of osmoregulatory neuroendocrine neurons in the SON of the rat hypothalamus. To test the validity of the Glasso network, we either overexpressed or knocked downCaprin2transcripts in differentiated rat pheochromocytoma PC12 cells and showed that these manipulations had significant opposite effects on the levels of putative target mRNAs. These studies suggest that the predicative power of the Glasso algorithm within anin vivosystem is accurate, and identifies biological targets that may be important to the functional plasticity of the SON.
Sensory Coding and Sensitivity to Local Estrogens Shift during Critical Period Milestones in the Auditory Cortex of Male Songbirds
Authors: Vahaba Daniel M. , Macedo-Lima Matheus , Remage-Healey Luke
Published: December 2017

Vocal learning occurs during an experience-dependent, age-limited critical period early in development. In songbirds, vocal learning begins when presinging birds acquire an auditory memory of their tutor’s song (sensory phase) followed by the onset of vocal production and refinement (sensorimotor phase). Hearing is necessary throughout the vocal learning critical period. One key brain area for songbird auditory processing is the caudomedial nidopallium (NCM), a telencephalic region analogous to mammalian auditory cortex. Despite NCM’s established role in auditory processing, it is unclear how the response properties of NCM neurons may shift across development. Moreover, communication processing in NCM is rapidly enhanced by local 17β-estradiol (E2) administration in adult songbirds; however, the function of dynamically fluctuating E2in NCM during development is unknown. We collected bilateral extracellular recordings in NCM coupled with reverse microdialysis delivery in juvenile male zebra finches (Taeniopygia guttata) across the vocal learning critical period. We found that auditory-evoked activity and coding accuracy were substantially higher in the NCM of sensory-aged animals compared to sensorimotor-aged animals. Further, we observed both age-dependent and lateralized effects of local E2administration on sensory processing. In sensory-aged subjects, E2decreased auditory responsiveness across both hemispheres; however, a similar trend was observed in age-matched control subjects. In sensorimotor-aged subjects, E2dampened auditory responsiveness in left NCM but enhanced auditory responsiveness in right NCM. Our results reveal an age-dependent physiological shift in auditory processing and lateralized E2sensitivity that each precisely track a key neural “switch point” from purely sensory (pre-singing) to sensorimotor (singing) in developing songbirds.
Cortical Afferents and Myeloarchitecture Distinguish the Medial Intraparietal Area (MIP) from Neighboring Subdivisions of the Macaque Cortex
Authors: Bakola Sophia , Passarelli Lauretta , Huynh Tony , Impieri Daniele , Worthy Katrina H. , Fattori Patrizia , Galletti Claudio , Burman Kathleen J. , Rosa Marcello G. P.
Published: December 2017

The parietal reach region (PRR) in the medial bank of the macaque intraparietal sulcus has been a subject of considerable interest in research aimed at the development of brain-controlled prosthetic arms, but its anatomical organization remains poorly characterized. We examined the anatomical organization of the putative PRR territory based on myeloarchitecture and retrograde tracer injections. We found that the medial bank includes three areas: an extension of the dorsal subdivision of V6A (V6Ad), the medial intraparietal area (MIP), and a subdivision of area PE (PEip). Analysis of corticocortical connections revealed that both V6Ad and MIP receive inputs from visual area V6; the ventral subdivision of V6A (V6Av); medial (PGm, 31), superior (PEc), and inferior (PFG/PF) parietal association areas; and intraparietal areas AIP and VIP. They also receive long-range projections from the superior temporal sulcus (MST, TPO), cingulate area 23, and the dorsocaudal (area F2) and ventral (areas F4/F5) premotor areas. In comparison with V6Ad, MIP receives denser input from somatosensory areas, the primary motor cortex, and the medial motor fields, as well as from visual cortex in the ventral precuneate cortex and frontal regions associated with oculomotor guidance. Unlike MIP, V6Ad receives stronger visual input, from the caudal inferior parietal cortex (PG/Opt) and V6Av, whereas PEip shows marked emphasis on anterior parietal, primary motor, and ventral premotor connections. These anatomical results suggest that MIP and V6A have complementary roles in sensorimotor behavior, with MIP more directly involved in movement planning and execution in comparison with V6A.
A New, High-Efficacy, Noninvasive Transcranial Electric Stimulation Tuned to Local Neurodynamics
Authors: Cottone Carlo , Cancelli Andrea , Pasqualetti Patrizio , Porcaro Camillo , Salustri Carlo , Tecchio Franca
Published: December 2017

In this paper, we pose the following working hypothesis: in humans, transcranial electric stimulation (tES) with a time course that mimics the endogenous activity of its target is capable of altering the target's excitability. In our case, the target was the primary motor cortex (M1). We identified the endogenous neurodynamics of hand M1's subgroups of pyramidal neuronal pools in each of our subjects by applying Functional Source Separation (FSS) to their EEG recordings. We then tested whether the corticospinal excitability of the hand representation under the above described stimulation, which we named transcranial individual neurodynamics stimulation (tIDS), was higher than in the absence of stimulation (baseline). As a check, we compared tIDS with the most efficient noninvasive facilitatory corticospinal tES known so far, which is 20 Hz transcranial alternating current stimulation (tACS). The control conditions were as follows: (1) sham, (2) transcranial random noise stimulation (tRNS) in the same frequency range as tIDS (1–250 Hz), and (3) a low current tIDS (tIDSlow). Corticospinal excitability was measured with motor-evoked potentials under transcranial magnetic stimulation. The mean motor-evoked potential amplitude increase was 31% of the baseline during tIDS (p< 0.001), and it was 15% during tACS (p= 0.096). tRNS, tIDSlow, and sham induced no effects. Whereas tACS did not produce an enhancement in any subject at the individual level, tIDS was successful in producing an enhancement in 8 of the 16 subjects. The results of the present proof-of-principle study showed that proper exploitation of local neurodynamics can enhance the efficacy of personalized tES.

SIGNIFICANCE STATEMENTThis study demonstrated that, in humans, transcranial individual neurodynamics stimulation (tIDS), which mimics the endogenous dynamics of the target neuronal pools, effectively changes the excitability of these pools. tIDS holds promise for high-efficacy personalized neuromodulations based on individual local neurodynamics.
Representación de dominios teóricos mediante retículos: el dominio de la herencia biológica durante el periodo 1865-1902
Authors: Méndez Diego , Casanueva Mario
Published: December 2017

En lo que sigue, se reconstruye el dominio de teorías relativas a la herencia biológica, propuestas durante el periodo 1865-1902. Se trata de un episodio científico de mucha controversia y audaces especulaciones, libres de los constreñimientos de un paradigma establecido. En consecuencia, surgieron propuestas muy diversas, para las cuales no empata bien la categoría metateórica de red. De cualquier manera, los elementos teóricos detectados sí guardan vínculos entre sí, debido a que comparten ciertas estructuras, y esto permite introducir mediante un arreglo reticular la idea de dominio, donde la naturaleza de los vínculos no alude a especializaciones de leyes fundamentales sino a la secuencia en el armado de subestructuras. El trabajo explora esta posibilidad combinando el aparato del programa estructuralista con la técnica ordenadora denominada Análisis Formal de Conceptos (Formal Concept Analysis): en concreto se aplica dicho procedimiento a una muestra de veinte reconstrucciones, de elementos teóricos relativos a la herencia entre 1865 y 1902.
Aplicaciones intencionales de la mecánica cuántica
Authors: Lastiri Mariano
Published: December 2017

Este trabajo presenta algunas discusiones preliminares a una reconstrucción de la mecánicacuántica desde una perspectiva estructuralista. Intento responder a la pregunta por lostérminos MQ- no teóricos, es decir, qué magnitudes pueden ser medidas con independenciade la ecuación de Schrödinger y de la regla de Born. Uno de los aspectos relevantes que puedeser analizado una vez que se ha respondido a esta pregunta es el problema de la medición.Dado que el problema de la medición está directamente relacionado con el carácter linealde la evolución temporal del estado dada por la ecuación de Schrödinger, la medición delos valores de aquellos conceptos que no presupongan esta ley no se verá afectada por esteproblema. Si bien esto no responde a todas las preguntas sobre la medición cuántica, indicaun primer paso a dar en la dirección hacia una comprensión más acabada de este problema.
Is Thinking a Matter of Knowing?
Authors: Verdejo Aparicio Víctor Martín
Published: December 2017

¿Hay requisitos epistemológicos para la posesión de conceptos? Aunque nuestra intuición apunta claramente a una relación muy estrecha entre condiciones de posesión de conceptos y ciertos tipos de conocimiento (principalmente, conocimiento del contenido de los conceptos relevantes), posiciones naturalistas en filosofía —como la defendida por Jerry Fodor— traen consigo una visión según la cual los conceptos que un sujeto posee son independientes metafísica y conceptualmente de las capacidades epistémicas de dicho sujeto. En este artículo argumentaré que, tal y como el análisis del dogmatismo de Pryor puede mostrar, las teorías de la justificación epistémica proporcionan, desde un punto de vista general, apoyo independiente a la idea intuitiva de requisitos epistemológicos para la posesión de conceptos. Por este motivo, las aproximaciones naturalistas a los conceptos harían bien en evitar condiciones de posesión que carezcan de compromisos epistemológicos.
Desarrollo conceptual y evolución histórica. Consideraciones sobre los límites de la dialéctica
Authors: Ruiz Sanjuán César
Published: December 2017

En el presente trabajo se aborda el significado de los límites de la dialéctica en el pensamiento de Marx, lo que permite determinar la diferencia fundamental que separa la concepción marxiana de la dialéctica de la concepción hegeliana. Para analizar lo que significa para Marx este concepto es necesario distinguir entre el desarrollo conceptual de la exposición y el lugar que le corresponde a la investigación de la evolución histórica, de lo cual nos ocupamos en los primeros apartados del trabajo. A partir de aquí, examinamos en los siguientes apartados el sentido y las implicaciones teóricas de los límites de la exposición dialéctica.
Apogeo y crisis del racionalismo estético durante L'âge classique
Authors: Murcia Serrano Inmaculada
Published: December 2017

El siglo XVII en Francia, tan marcado por la filosofía cartesiana y el arte clasicista, puso las bases del nacimiento de la disciplina estética. La crisis de los modelos poéticos racionalistas, representados paradigmáticamente por el Arte poética de Boileau, precipitó las reflexiones filosóficas sobre la relatividad de lo bello y sobre su inmediatez y sensualidad, simultaneando lo que estaba ocurriendo en Francia con lo que sucedía en el ámbito británico. La querelle de les anciens et des modernes, así como la controvertida obra del abate Du Bos pueden considerarse como dos de los desafíos más relevantes para la supervivencia de esos modelos tradicionales.
Mundanidad, significatividad y habla. Dimensiones proto-lingüísticas de la significación en "Ser y Tiempo"
Authors: Leconte Mariana
Published: December 2017

En el marco de una investigacióngeneral, que se ocupa de la concepción del pensamiento como respuesta a un proceso de emergencia dela significación, la hipótesis de este trabajo supone el lenguaje originariocomo el acaecer de una interpelación significativa precedente a todaintencionalidad, que abre el horizonte de significado dentro del cual se muevenel pensamiento y el lenguaje entendido como sistema de signos. En la vertiente ontológicarepresentada por Heidegger, que se considera parcialmente en este artículo, lasformulaciones fenomenológicas identifican la significación anterior al lenguajearticulado –o significación proto-lingüística- con un acaecimiento ontológico. Estas líneas se referirán alos análisis heideggerianos de Ser yTiempo, para reiterar sus descripciones del acaecer del mundo en laperspectiva de la interpretación de este acaecer como significación originariade la que derivan la emergencia del lenguaje y sus significados.
Euclides de Mégara, filósofo socrático
Authors: Gardella Mariana
Published: December 2017

El objetivo de este trabajo es mostrar la influencia socrática sobre la filosofía de Euclides de Mégara, en contra de la interpretación que señala la influencia de los eleáticos sobre su teoría. Para ello indicaré que la doctrina de Euclides exhibe una fuerte impronta socrática, al menos en lo que concierne a: su labor como escritor de diálogos socráticos, el uso de la dialéctica erística, el desarrollo de algunos postulados éticos sobre la conducta frente a la muerte, el auto-dominio y la unidad de la virtud, y la presentación de una metafísica que coloca al bien en un lugar privilegiado. Aunque esta metafísica excede el socratismo, no puede ser identificada con los postulados de la filosofía eleática.
Hugo Grotius and Samuel Pufendorf on the power of necessity to override property rights
Authors: Udi Juliana
Published: December 2017

En el presente trabajo analizo el “derecho de necesidad” que Hugo Grocio y Samuel Pufendorf reconocen a las personas que atraviesan una situación de necesidad extrema. Explicito su estatus deóntico, su base justificatoria y sus exigencias con el objetivo de evaluar sus consecuencias distributivas. Me propongo mostrar que, a pesar de la considerable atención que ambos autores prestan a la cuestión de la fuerza de la necesidad de unos individuos para sobreponerse a los derechos de propiedad de otros, las consecuencias distributivas del derecho de necesidad que justifican son poco significativas.
El objeto de la angustia: la complementariedad del enfoque fenomenológico y el enfoque psicoanalítico
Authors: Conde Soto Francisco
Published: December 2017

Desde el ámbito de la fenomenología (Husserl y Heidegger) se propone que la angustia no apunta intencionalmente a ningún objeto. Las teorías psicoanalíticas de Freud y Lacan, por su parte, afirman que la angustia guarda relación a un objeto que la causa. La tesis de este artículo es que se trata de dos enfoques que aparentan ser contradictorios, pero en realidad son complementarios, al situarse en dos dimensiones diferentes: intencional y etiológica.
¿El retorno del narrador? Reflexiones sobre la lectura benjaminiana de Kafka
Authors: Di Pego Anabella
Published: December 2017

Walter Benjamin encuentra en la figura de Kafka la posibilidad del retorno del narrador aún en tiempos en los que anuncia el fin de la narración. Abordamos esta aparente paradoja, dilucidando los “pequeños trucos” kafkianos que aunque situando sus relatos en sintonía con los cuentos trastocan la narración tradicional haciendo que pueda subsistir bajo las condiciones de vida modernas. Si bien la astucia es otro elemento presente en los cuentos y en la narrativa de Kafka, ésta no parece residir en sus personajes sumidos en el aplazamiento y la impotencia ante la arbitrariedad. Procuramos develar la peculiar astucia kafkiana a partir del vínculo que Benjamin establece con la astucia de Ulises –en el relato “El silencio de las sirenas”– como uno de los antepasados de Kafka en la antigüedad. En este recorrido, tal vez Kafka aparezca como un gran narrador cuya prosa fulgura en las postrimerías de la narración.
Candice Lin: paisaje, territorio y fronteras (Candice Lin: Landscape, Territory and Boundaries)
Authors: Baltodano Román Gabriel
Published: December 2017

Se analizan los contenidos ideológicos de la acuarela «Nacimiento de una nación» (2008), de Candice Lin. A partir de nociones como territorio, tropo caníbal, tipo botánico tropical y pensamiento fronterizo, se plantea una interpretación de esa paisajística pictórica, en que la artista-activista reflexiona sobre el régimen de representación visual. Mediante diversos procedimientos formales, Lin pone en entredicho preceptos centrales de la mentalidad colonialista, que contrapone a las concepciones indigenistas. Abstract An analysis is provided of the ideological contents of the watercolor “Birth of a Nation” (2008), by Candice Lin. This interpretation of this pictorial landscape is based on notions such as territory, cannibal tropes, tropical botanical types and border thinking. The artist activist reflects here on the regime of visual representation. Using different formal procedures, Lin questions central precepts of the colonialist mentality, in contrast with indigenous conceptions.
Fuzzy index for swine thermal comfort at nursery stage based on behavior
Authors: Freitas Leticia Cibele Silva Ramos Freitas , Campos Alessandro Torres Campos , Schiassi Leonardo Schiassi , Yanagi junior Tadayuki Yanagi Júnior , Cecchin Daiane Cecchin
Published: December 2017

Este trabajo tuvo como objetivo desarrollar y evaluar un modelo matemático computacional, con base en la teoría de los conjuntos fuzzy, para predecir el confort térmico a partir del comportamiento de lechones, en función de su edad y del índice de temperatura de globo y humedad, en dos tipologías de instalación de preceba. La instalación 1 estaba compuesta por corrales de mampostería y piso de malla metálica, y la instalación 2 tenía corrales construidos con tablilla de madera y piso en malla plástica. La instalación 2 presentó una mayor frecuencia comportamental en la condición de confort que la instalación 1, con 39,32% y 38,16% respectivamente. Los valores da tasa de confort térmico estimados por el sistema fuzzy presentaron una desviación estándar media de 3,58% y coeficiente de determinación de 72,86%. El modelo fuzzy desarrollado mostró ser adecuado para la predicción de la tasa de confort térmico a partir del comportamiento de los animales.
Evolución climática en la costa de Ecuador por efecto del cambio climático
Authors: García-Garizábal Iker , Romero Paola , Jiménez Samantha , Jordá Luis
Published: December 2017

Este trabajo caracteriza el clima de la serie histórica (1982-2011) de temperatura media y precipitación y sus proyecciones futuras (2012-2099) en la Provincia de Santa Elena, región más occidental del Ecuador continental con características desérticas en el cinturón intertropical. El análisis histórico muestra aumentos de temperatura (0,038 ºC/año) y precipitación (0,196 mm/año). La comparación del clima histórico y generado por 65 modelos climáticos determina al escenario ECHOG A2 como más adecuado para reproducir el clima de la zona. Dicho modelo predice a final del siglo XXI aumentos en la temperatura media (+2,7 ºC), precipitación (+8,2%) y en los valores máximos de lluvia anual. La evolución de la temperatura y precipitación no lleva cambios en las características de clima anual que se mantiene como Semidesértico árido, si bien mensualmente disminuye la aridez de enero a abril.
Changes in liquid phase and mechanical properties during osmodehydrofreezing of papaya (carica papaya L.)
Authors: Ayala-Aponte Alfredo Adolfo , Sanchez Tamayo Martha Isabel
Published: December 2017

El objetivo de este trabajo fue evaluar la influencia de tratamientos osmóticos sobre la velocidad de congelación, pérdida de fase líquida (PFL), módulo elástico (ME) y esfuerzo del límite de fluencia (σL) en muestras de papaya (Carica papaya L.) almacenadas en congelación. La deshidratación se realizó con soluciones osmóticas de sacarosa de 45 y 55°Brix durante 30 y 90 min. Las muestras osmo-deshidratadas fueron congeladas a -40°C y almacenadas durante 10, 20, 30 y 60 días. Fruta fresca fue empleada como muestra control (No tratada). Los resultados mostraron que las muestras tratadas presentaron menores pérdidas de fase líquida respecto a las muestras control. El módulo elástico en las muestras tratadas presentó mayores valores en comparación con las muestras control. El esfuerzo del límite de fluencia disminuyó para todos los tratamientos durante el almacenamiento y las muestras tratadas mostraron valores superiores de σL respecto a las muestras no tratadas.
Model for decision-making, change of LPG stove to induction stove, case in Ecuador
Authors: Naula Sigua Freddy Benjamin , Campoverde Campoverde Jorge Arturo , Borenstein Denis
Published: December 2017

El gobierno ecuatoriano se ha propuesto introducir de forma masiva en el mercado nacional, el uso de las cocinas de inducción, ello en reemplazo de la cocina GLP (Gas Licuado de Petróleo). Sin embargo en la elección de la cocina de inducción o GLP, por parte del ciudadano, además de los factores económicos intervienen también criterios o factores que caen dentro de la subjetividad; Es decir intervienen múltiples criterios. El presente artículo aporta con un método de apoyo que sugiere al usuario una posible mejor opción, teniendo en cuenta criterios tanto cuantitativos como cualitativos. Además se analizan posibles escenarios y su impacto en la decisión final.
Manufacturing and evaluation of Chitosan, PVA and Aloe Vera hydrogels for skin applications
Authors: Escobar-Sierra Diana Marcela , Perea-Mesa Yuli Paola
Published: December 2017

El objetivo fue desarrollar membranas de Polivinil Alcohol (PVA) y Quitosano (Qo), capaces de absorber solución de Aloe Vera y luego liberarla gradualmente para acelerar la cicatrización de la herida. La metodología empleada consistió en variar la composición de las membranas usando quitosano y Polivinil Alcohol al 5 y 10% p/v, e implementar diferentes relaciones de PVA/Qo de 30/70, 50/50 y 70/30 (v/v), para posteriormente embeberlas en solución de Aloe Vera al 2% (v/v) y formar hidrogeles. Una vez obtenidos, éstos fueron caracterizados por Espectroscopía de Infrarrojo y Microscopía Electrónica de Barrido, y evaluadas por pruebas mecánicas, pruebas de absorción, y ensayos de actividad bactericida.El grado de entrecruzamiento entre el PVA y el Quitosano permitió obtener una matriz con alta capacidad de absorción y liberación controlada de Aloe Vera, con propiedades mecánicas y estabilidad dimensional aún después de rehidratadas. Las pruebas bactericidas mostraron actividad protectora del quitosano y del Aloe Vera, lo cual hace que este compuesto sea adecuado para aplicaciones que ayudan en la curación de heridas.
Carbon nanotube dispersion for in-vitro applications
Authors: Espinosa Claudia , Ortiz-Trujillo Isabel Cristina , Carlos-Cornelio Jesús Antonio , Zapata-Hernández Raúl Darío , Hoyos-Palacio Lina Marcela
Published: December 2017

Los nanotubos de carbono (CNTs) han atraído un enorme interés debido a sus muchas características que los convierten en un material prometedor para aplicaciones biomedicas. Un desafío importante cuando se trabaja con CNTs es la dificultad de dispersarlos homogéneamente en un fluido. Esta investigación es un análisis comparativo de la dispersión de nanotubos de carbono de pared múltiple (MWCNTs) en diferentes fluidos (agua destilada, agua ultrapura de tipo I [Milli-Q], etanol, dimetilsulfóxido [DMSO] y medio de cultivo celular [RPMI-1640]). Utilizando dos diferentes técnicas de sonicación (sonicación con lanza ultrasónica y sonicación ultrasónica de baño), así como la determinación del efecto de la esterilización en presencia y ausencia de fluido antes de la dispersión. Los resultados indican que el mejor método de dispersión de los CNTs es usando un sonicador tipo lanza y esterilizarlos en presencia de fluido.
Ubiquitous learning model based on platforms of multi-screen TV (uLMTV)
Authors: Moreno López Gustavo Alberto , Jiménez Builes Jovani Alberto , Ramírez Monsalve Edgar Jesús
Published: December 2017

Las TIC han potencializado los procesos educativos, pero aún hay desafíos de flexibilidad, convergencia, entre otros. Este artículo propone un modelo de aprendizaje ubicuo (u-learning) que puede impactar positivamente al proceso de enseñanza/aprendizaje, ya que contempla el video como un elemento importante, que se puede desplegar en cualquier pantalla, en cualquier momento y lugar. Además de indicar los elementos que intervienen en el modelo, se presentan alternativas de implementación, usos del video, y una experimentación con una plataforma de video basada en la nube. Los resultados demuestran un despliegue óptimo del video en diferentes dispositivos cuando se utiliza una plataforma de video multi-pantalla conectada a Internet, y muestran este modelo como una buena referencia para proyectar un servicio de u-learning.
Comparing energy consumption for rail transit routes through Symmetric Vertical Sinusoid Alignments (SVSA), and applying artificial neural networks. A case study of Metro Valencia (Spain)
Authors: Pineda-Jaramillo Juan Diego , Salvador-Zuriaga Pablo , Insa-Franco Ricardo
Published: December 2017

Este artículo presenta el entrenamiento de una red neuronal artificial usando el consumo energético medido en la red metropolitana de Valencia, España, para estimar el consumo energético de un sistema metro. Después de la calibración y validación de la red neuronal, los resultados obtenidos muestran que esta puede ser utilizada para predecir el consumo energético con una gran precisión. Una vez entrenada, la red neuronal es utilizada para probar diferentes escenarios de operación hipotéticos con el objetivo de reducir el consumo energético de un sistema metro. Estos escenarios de operación incluyen diferentes trazados verticales que prueban que los Alineamientos Verticales Sinusoidales Simétricos (SVSA, por sus siglas en inglés) pueden reducir el consumo energético en un 18.41 % en contraste con un alineamiento plano (pendiente del 0%).