bluuebunny/crossref_metadata_2025 huggingface dataset:
Fiabilidad y evidencias de validez de un instrumento para la evaluación de la calidad de los mapas conceptuales
Authors: Lucas-Molina Beatriz , Pérez-Albéniz Iturriaga Alicia , Fonseca-Pedrero Eduardo , Ortuño-Sierra Javier , Urraca María Luz , Santarén-Rosell Marta
Published: May 2017

Diversos autores han señalado el interés y la pertinencia de los mapas conceptuales como herramientas para el aprendizaje significativo. Sin embargo, la revisión de la literatura pone de manifiesto la escasez de propuestas dirigidas a la evaluación de los mapas con criterios objetivables y la complejidad de las existentes. El objetivo del presente estudio fue desarrollar un instrumento para la evaluación de los mapas conceptuales en formato rúbrica. De esta manera, se consigue que los alumnos posean una herramienta que permita, mediante indicadores precisos, la evaluación de la calidad tanto de sus ejecuciones como de las ejecuciones realizadas por otros. Se construyó una rúbrica que incluye los criterios más aceptados en la literatura para la evaluación de mapas conceptuales. Se realizaron dos estudios piloto con sendos grupos de alumnos universitarios (n=31 y n=18) que recibieron un programa de entrenamiento de cuatro horas. Los resultados indicaron que el instrumento diseñado muestra una buena fiabilidad interjueces e indicadores de validez discriminante. Se concluye que el instrumento diseñado para la evaluación de la calidad de los mapas conceptuales en formato rúbrica muestra adecuadas propiedades psicométricas. Asimismo, el instrumento permite aplicar criterios objetivables en la evaluación de los mapas y la comparación entre diferentes ejecuciones.
Intervención en educación del ocio para la infancia en Honduras desde un enfoque humanista
Authors: Berrios Palacios Maite Asly , Lazcano Quintana Idurre , Madariaga Ortuzar Aurora
Published: May 2017

Honduras es uno de los primeros países en firmar los acuerdos y convenciones a favor los derechos de la infancia. Sin embargo, debido a las condiciones de pobreza, se convierte en uno de los países con mayor deuda social con este colectivo. Las condiciones de pobreza y desigualdad que aquejan a la población en general de América Latina y, por ende, a la infancia, son especialmente complejas en algunos países de la región. Este trabajo se apoya en un amplio marco conceptual en el que se profundiza teóricamente en el fenómeno del ocio como ámbito para el desarrollo humano; en el juego como base para el disfrute del ocio y factor de desarrollo en la infancia; en la Normativa Legal sobre los derechos de la infancia, así como la problemática específica de Honduras; y en la teoría de educación del ocio como forma de intervención. Este artículo se centra en el diseño de un Proyecto de intervención en educación del ocio para la infancia en Honduras desde un enfoque humanista. Para ello se describe el contexto de aplicación del proyecto atendiendo al marco legal educativo vigente en Honduras; la descripción del Centro de Innovación Educativa en el que se contextualiza el proyecto de intervención, perteneciente a la Universidad Pedagógica Nacional Francisco Morazán; y los programas y actividades que dan contenido a la intervención diseñada.
Estudio psicométrico de la aplicación del Internet Addiction Test con estudiantes universitarios españoles
Authors: Marín-Díaz Verónica , Sampedro Requena Begoña Esther , Vega Gea Esther
Published: May 2017

Internet ha experimentado en los últimos años una evolución exponencial al crecimiento de la sociedad. A la par han ido surgiendo diversos problemas de diferente naturaleza, asociados a distintas herramientas creadas bajo su ala, como son las redes sociales. Uno de esos problemas, común a muchos recursos digitales, es la adicción. Para determinar el grado de adicción o de uso problemático de los jóvenes a Internet Young creó el Internet Addiction Test. La intención de este artículo ha sido validar si dicho instrumento, con las modificaciones oportunas (lingüísticas, culturales y adaptaciones a la herramienta a trabajar) puede medir el grado de adicción a las redes sociales. Para ello y siguiendo las pautas del trabajo de Watters, Keefer, Kloosterman, Summerfeldt y Parker (2013), se ha estudiado si dicha prueba es igualmente válida para medir la adicción a las redes sociales. Para ello se ha realizado un análisis bifactorial exploratorio confirmatorio, a una muestra de N=362 estudiantes de los grados de Educación Infantil, Educación Primaria, Educador Social, Pedagogía y Administración y Dirección de Empresas de la Universidad de Córdoba. El resultado preliminar ha sido positivo, reflejando que dicho recurso puede ser empleado tanto para determinar el grado de adicción a Internet como a las redes sociales.
An unusual presentation of brain metastasis: Multiple skull and parenchymal lesions masquerading as infective etiology
Authors: Rath Satyajeet , Rastogi Madhup , Gandhi Ajeet Kumar , Agrawal Animesh , Singh Harikesh Bahadur
Published: May 2017

Brain metastasis is a common occurrence in many solid malignancies. The radiological diagnosis is often determined with magnetic resonance imaging (MRI). We report a case of a 60-year-old lady who had headaches for two months, followed by seizures. Her MRI showed multiple skull and brain parenchymal lesions simulating an infective etiology. Further investigations revealed a primary carcinoma of the right lung. The patient showed improvement in symptoms once chemotherapy was started. Brain metastases can masquerade as infective lesions and delay the diagnosis of malignancy. A high index of suspicion is required to allow a prompt diagnosis and treatment.
Mathematical modeling of dynamic processes in a hydraulic drive with a discrete regulator of liquid flow
Authors: Shakhmatov Ye. V. , Gimadiev A. G. , Sverbilov V. Y. , Sinyakov A. F.
Published: May 2017

The paper presents a mathematical model of a hydraulic drive with a discrete liquid flow regulator in the form of a switched inertial device that has a damper of working medium oscillations at the output. A hydraulic actuator loaded with mass was used as a final control element. Transition processes occurring when the regulator is activated are calculated by modeling the dynamic processes with the help of the Simulink software package. The research shows the impact of the valve operating frequency and pulse ratio on the dynamics and efficiency of the hydraulic drive. It could be concluded that the use of a hydraulic attenuator results in decreasing the level of pressure ripples at the inertial tube input.
Using heat pipes to improve the efficiency of gas-dynamic thermal stratification
Authors: Tsynaeva A. A. , Tsynaeva E. A. , Shkolin E. V.
Published: May 2017

A numerical solution of differential equations describing the motion and heat exchange in the boundary layer is used to simulate heat transfer in a tube of thermal stratification. The numerical solution proves that the use of heat pipes will make it possible to increase the efficiency of a tube of thermal stratification.
Method of reducing speckle-interferometer sensitivity for the study of turbomachine elements vibration
Authors: Zhuzhukin A. I. , Solyannikov V. A.
Published: May 2017

The article deals with the development of a method for obtaining time-averaged speckle-interferograms with a two-fold period of interference bands. An optical scheme allowing the increase of permissible vibration amplitudes of the analysed elements has been developed. Vibration characterictics of compressor stage 5 blades are subjected to comparative analysis with the use of both the developed method and the traditional methods. The diagram of compressor blade leading edge vibrodisplacements is made up on the basis of the data obtained.
Analysis of nonstationary thermal state of low-thrust liquid rocket engine with high-concentration hydrogen peroxide and kerosene propellant with film cooling
Authors: Vorobiev A. G. , Borovik I. N. , Ha Song-Up
Published: May 2017

The paper presents an analysis of the nonstationary thermal state of a low-thrust liquid rocket engine with HTHP (high-test hydrogen peroxide) and kerosene propellant with film cooling. A mathematical model was developed with internal convective and radiant heat fluxes. The model takes into account the heat flux pass through the wall. The results of the calculations show that in order to provide long working life of the combustion chamber wall it is necessary to use either 96% of HPK at the level of 20% of HTHP or 20% of kerosene needed for film cooling.
Analysis of nonstationary thermal state of a low-thrust liquid rocket engine taking into account injection, evaporation and combustion of liquid fuel droplets
Authors: Vorobiev A. G. , Borovik I. N. , Ha Song-Up
Published: May 2017

The physico-chemical state of reaction products in the combustion chamber of a liquid rocket engine of 500N thrust with account for the evaporation of liquid fuel droplets (highly concentrated hydrogen peroxide (96%) - and kerosene) and their combustion is discussed and analyzed in the paper on the basis of numerical methods. The software system ANSYS Fluent which is a universal program for the solution of thermohydraulic problems is used for the purpose.
Nonsynchronous vibrations of turbomachinery bladed discs
Authors: Basov P. A. , Seleznev V. G.
Published: May 2017

The paper brings forward the method of determining nonsynchronous vibrations of turbomachinery bladeddiscs, based on the hypothesis of mechanical generator. Turbomachinery stages represented as a mechanicalgenerator open up new opportunities for test results interpretation for the purpose of gas-turbine engine mountsdevelopment and make it possible to improve the reliability of diagnostics of nonsynchronous vibrations andtheir occurrence and development mechanism. Turbomachinery bladed discs represented as a mechanical generatorcomponent part revealed that nonsynchronous vibrations of turbomachinery bladed disc are determined bydesign features of bladed disc and vane. The paper contains some examples of spectra for fan strain-gaugingresults, on the basis of which the analysis of nonsynchronous vibrations of turbomachinery bladed discs wascarried out. Vibrations of bladed disc with forward and backward strain waves having coefficients k1 and k2, respectively,are considered as a mode of bladed disc being a part of the mechanical generator, which vibrationmode is presented by the algebraic sum of broken coefficients. The algebraic sum of these coefficients equalswith a ratio of vibration frequency of bladed disc as a mechanical generator part to rotation frequency. The introducedgenerator of mechanical vibrations model can be applied to the analysis of nonsynchronous vibrationswhen processing results of turbomachinery bladed discs rig tests.
Enhancing productivity of groundnut based intercropping systems under rainfed conditions of Gujarat
Authors: Chaudhari D. T. , Vekariya P. D. , Talpada M. M. , Sutaria G. S.
Published: May 2017

A field experiment was conducted during Kharif season of 2011-12 at Instructional Farm, Department of Agronomy, College of Agriculture, Junagadh Agricultural University, Junagadh to study the production potential and economics of groundnut based intercropping systems under rainfed conditions. The experiment was laid out in randomized block design with thirteen treatments comprising of six intercrops viz., pearl millet, black gram, soybean, cotton, castor and pigeon pea with groundnut in the replacement series of 2:1 row proportion and their sole crops replicated thrice. The productivity in terms of groundnut pod equivalent yield was significantly higher with groundnut + pigeon pea followed by groundnut + castor and groundnut + cotton than sole groundnut and other intercropping systems. The biological efficiency in terms of LER, LEC, ATER and CPR were also significantly recorded maximum values and indicated a modest aggressivity and CR and gave a good value for the product of RCC with groundnut + pigeon pea followed by groundnut + castor and groundnut + cotton. The economics of the systems also indicates that groundnut + pigeon pea was most profitable system in terms of gross return, net return, MAI, B: C ratio and MER followed by groundnut + castor and groundnut + cotton
Vibration Control Design for a Plate Structure with Electrorheological ATVA Using Interval Type-2 Fuzzy System
Authors: Lin Chih-Jer , Lee Chun-Ying , Liu Ying
Published: May 2017

This study presents a vibration control using actively tunable vibration absorbers (ATVA) to suppress vibration of a thin plate. The ATVA’s is made of a sandwich hollow structure embedded with the electrorheological fluid (ERF). ERF is considered to be one of the most important smart fluids and it is suitable to be embedded in a smart structure due to its controllable viscosity property. ERF’s apparent viscosity can be controlled in response to the electric field and the change is reversible in 10 microseconds. Therefore, the physical properties of the ERF-embedded smart structure, such as the stiffness and damping coefficients, can be changed in response to the applied electric field. A mathematical model is difficult to be obtained to describe the exact characteristics of the ERF embedded ATVA because of the nonlinearity of ERF’s viscosity. Therefore, a fuzzy modeling and experimental validations of ERF-based ATVA from stationary random vibrations of thin plates are presented in this study. Because Type-2 fuzzy sets generalize Type-1 fuzzy sets so that more modelling uncertainties can be handled, a semi-active vibration controller is proposed based on Type-2 fuzzy sets. To investigate the different performances by using different types of fuzzy controllers, the experimental measurements employing type-1 fuzzy and interval type-2 fuzzy controllers are implemented by the Compact RIO embedded system. The fuzzy modeling framework and solution methods presented in this work can be used for design, performance analysis, and optimization of ATVA from stationary random vibration of thin plates.
Czynniki kształtujące obraz ciała u osób po pierwszym zawale serca
Authors: Zarek Aleksandra , Barański Jarosław
Published: May 2017

Wstęp: Doświadczenie zawału serca może zmienić nastawienie chorych wobec własnej cielesności. Sposób postrzegania i doświadczania własnego ciała może mieć istotny wpływ na przebieg zdrowienia, przestrzeganie zaleceń lekarskich oraz realizowanie prozdrowotnego trybu życia u tych chorych. Celem pracy była psychologiczna analiza związków między obrazem własnego ciała u chorego a czynnikami osobowościowymi, socjodemograficznymi, fizycznymi oraz medycznymi u osób po pierwszym zawale serca. Materiały i metody: Badaniami objęto 160 chorych po pierwszym zawale serca (80 kobiet i 80 mężczyzn) w wieku 34–65 lat (średnia =53,44; SD =6,40). Do badania obrazu ciała wykorzystano Kwestionariusz Obrazu Ciała, obraz siebie okre- ślono za pomocą Testu Przymiotników ACL-37 (Adjective Check List). Wyniki: Poziom zadowolenia z ciała kształtowany był przez dwa wymiary osobowości (Towarzyskość, Słabość i zahamowanie) oraz płeć badanych. Mniejsza satysfakcja z ciała łączyła się z większym nasileniem Słabości i zahamowania oraz mniejszym nasileniem Towarzyskości w profilu osobowości badanych. Kobiety były mniej zadowolone z ciała niż mężczyźni. Znaczenie przypisywane własnemu ciału kształtowane było przez dwa wymiary osobowości (Ekspansywność, Słabość i zahamowanie) chorych oraz ich wiek. Większe znaczenie cielesności nadawały osoby cechujące się w większym stopniu Ekspansywnością, a w mniejszym stopniu Słabością i zahamowaniem oraz osoby starsze. Wnioski: Zmiana ustosunkowania wobec własnego ciała u osób po pierwszym zawale serca powinna uwzględniać kształtowanie właściwości osobowości kluczowych dla poczucia własnej skuteczności oraz umiejętności społecznych.
Modeling effect of cover condition and soil type on rotavirus transport in surface flow
Authors: Bhattarai Rabin , Davidson Paul C. , Kalita Prasanta K. , Kuhlenschmidt Mark S.
Published: May 2017

Runoff from animal production facilities contains various microbial pathogens which pose a health hazard to both humans and animals. Rotavirus is a frequently detected pathogen in agricultural runoff and the leading cause of death among children around the world. Diarrheal infection caused by rotavirus causes more than two million hospitalizations and death of more than 500,000 children every year. Very little information is available on the environmental factors governing rotavirus transport in surface runoff. The objective of this study is to model rotavirus transport in overland flow and to compare the model results with experimental observations. A physically based model, which incorporates the transport of infective rotavirus particles in both liquid (suspension or free-floating) and solid phase (adsorbed to soil particles), has been used in this study. Comparison of the model results with experimental results showed that the model could reproduce the recovery kinetics satisfactorily but under-predicted the virus recovery in a few cases when multiple peaks were observed during experiments. Similarly, the calibrated model had a good agreement between observed and modeled total virus recovery. The model may prove to be a promising tool for developing effective management practices for controlling microbial pathogens in surface runoff.
Non-equilibrium model for solute transport in differently designed biofilters targeting agricultural drainage water
Authors: Pugliese Lorenzo , Bruun Jacob , Kjaergaard Charlotte , Hoffmann Carl Christian , Langergraber Guenter
Published: May 2017

Biogeochemical processes in subsurface flow constructed wetlands are influenced by flow direction, degree of saturation and influent loading position. This study presents a simulation tool, which aims to predict the performance of the unit and improve the design. The model was developed using the HYDRUS program, calibrated and verified on previously measured bromide (Br−) pulse tracer tests. Three different hydraulic designs (Horizontal (HF), Vertical upward (VF-up), Vertical downward (VF-down) and two different flow rates: Low (L), and High (H)) were investigated. The model simulated well the Br− transport behaviour and the results underline the importance of the hydraulic design. Calibrated model parameters (longitudinal dispersivity, immobile liquid phase, mass transfer coefficient) showed a common trend for all the designs, for increasing flow rates within the investigated range. The VF-down performed best, i.e. had the highest hydraulic retention time.
Phenolic Compounds from Edible Algae: Bioactivity and Health Benefits
Authors: Montero Lidia , del Pilar Sánchez-Camargo Andrea , Ibáñez Elena , Gilbert-López Bienvenida
Published: May 2017

Algae have been consumed for many years in Asian countries; at present, its
consumption around the world either as food ingredient or directly as food commodity
has increased considerably mainly due to the Asian influence and its cuisine, but also because
of the growing interest in the beneficial health effects of algae.

Although several biological activities have been attributed to different algae compounds
such as pigments, lipids, polysaccharides, fiber, proteins or vitamins, in the present review
we will highlight the different phenolic compounds present on seaweeds and their
important role in the functional and health effects, paying special attention to the antioxidant,
anti-proliferative, anti-obesity and antidiabetic activities.
Role of Infrared Spectroscopy and Imaging in Cancer Diagnosis
Authors: Kumar Saroj , Srinivasan Alagiri , Nikolajeff Fredrik
Published: May 2017

Background:

Cancer is a major global health issue. It causes extensive individual suffering
and gives a huge burden on the health care in society. Despite extensive research and different tools
have been developed it still remains a challenge for early detection of this disease. FTIR imaging has
been used to diagnose and differentiate the molecular differences between normal and diseased tissues.

Methods:

Fourier Transform Infrared Spectroscopy (FTIR) is able to measure biochemical changes in
tissue, cell and biofluids based on the vibrational signature of their components. This technique enables
to the distribution and structure of lipids, proteins, nucleic acids as well as other metabolites.
These differences depended on the type and the grade of cancer.

Results:

We emphasize here, that the FTIR spectroscopy and imaging can be considered as a promising
technique and will find its place on the detection of this dreadful disease because of high sensitivity,
accuracy and inexpensive technique. Now the medical community started using and accepting this
technique for early stage cancer detection. We discussed this technique and the several challenges in
its application for the diagnosis of cancer in regards of sample preparations, data interpretation, and
data analysis. The sensitivity of chemotherapy drugs on individual specific has also discussed.

Conclusion:

So far progressed has done with the FTIR imaging in understanding of cancer disease
pathology. However, more research is needed in this field and it is necessary to understand the morphology
and biology of the sample before using the spectroscopy and imaging because invaluable information
to be figured out.
Modulation of Aquaporins by Dietary Patterns and Plant Bioactive Compounds
Authors: Cataldo Ilaria , Maggio Anna , Gena Patrizia , de bari Ornella , Tamma Grazia , Portincasa Piero , Calamita Giuseppe
Published: May 2017

Healthful dietary patterns and bioactive compounds supplementation can be adopted as simple and easy intervention to prevent, attenuate or cure clinical disorders, especially when it comes to degenerative and chronic diseases. In the recent years, a growing body of evidence indicates Aquaporins (AQPs), a family of membrane channel proteins widely expressed in the human body, among the targets underlying the beneficial action played by some food nutrients and phytochemical compounds. Here, we provide an overview of what is known regarding the AQP modulation exerted by healthful dietary patterns and plant polyphenols.
Role of Positron Emission Tomography for Central Nervous System Involvement in Systemic Autoimmune Diseases: Status and Perspectives
Authors: Mauro Daniele , Barbagallo Gaetano , D`Angelo Salvatore , Sannino Pasqualina , Naty Saverio , Bruno Caterina , Olivieri Ignazio , Grembiale Rosa Daniela , Ursini Francesco
Published: May 2017

In the last years, an increasing interest in molecular imaging has been raised by
the extending potential of positron emission tomography [PET]. The role of PET imaging,
originally confined to the oncology setting, is continuously extending thanks to the development
of novel radiopharmaceutical and to the implementation of hybrid imaging techniques,
where PET scans are combined with computed tomography [CT] or magnetic
resonance imaging[MRI] in order to improve spatial resolution.

Early preclinical studies suggested that 18F–FDG PET can detect neuroinflammation;
new developing radiopharmaceuticals targeting more specifically inflammation-related
molecules are moving in this direction. Neurological involvement is a distinct feature of
various systemic autoimmune diseases, i.e. Systemic Lupus Erythematosus [SLE] or
Behcet’s disease [BD]. Although MRI is largely considered the gold-standard imaging
technique for the detection of Central Nervous System [CNS] involvement in these disorders.
Several patients complain of neuropsychiatric symptoms [headache, epilepsy, anxiety
or depression] in the absence of any significant MRI finding; in such patients the diagnosis
relies mainly on clinical examination and often the role of the disease process
versus iatrogenic or reactive forms is doubtful.

The aim of this review is to explore the state-of-the-art for the role of PET imaging in
CNS involvement in systemic rheumatic diseases. In addition, we explore the potential
role of emerging radiopharmaceutical and their possible application in aiding the diagnosis
of CNS involvement in systemic autoimmune diseases.
Foliar Micromorphological Evaluation of Cardiospermum halicacabum L. – An Important Medicinal Climber
Authors: Shekhawat Mahipal S. , Manokari M.
Published: May 2017

Background:

Due to non-availability or short supply of original medicinal plants the crude drugs from the plants are adulterated by similarly resembling plants. Micromorphological studies of leaves could help in the identification and authentication of the original medicinal plant from the crude drug materials.

Objective:

To investigate the qualitative and quantitative micromorphological parameters of the leaves ofCardiospermum halicacabum.

Method:

The foliar micromorphological parameters such as orientation, stomatal types and morphology; density, distribution of trichomes and stomata; stomatal index and trichome types, paradermal sections were obtained manually by the standard method. The leaves were excised and fixed primarily in formalin, acetic acid and ethyl alcohol solution; cleared in 70% ethanol, bleached with 5% NaOH and rinsed in distilled water. The cleared leaves were used for the study of venation pattern, vein-islets, veinlet terminations and arrangement of crystals.

Results:

The microscopic examinations revealed the presence of anomocytic and anisocytic types of stomata with the abaxial epidermis of leaves. The stomatal density was 72 and stomatal index reported as 33.1. Glandular trichomes were few with uniseriate stalk, capitate multiseriate and multicellular head. Non-glandular trichomes frequent which were unicellular, uniseriate and bristle in nature. The density of vein islets and veinlet termination was observed as 18 and 13 respectively.

Conclusion:

The foliar micromorphological (stomata, vein clearing etc.) findings could be used in the proper identification and authentication ofC. halicacabumfrom the crude plant materials which is essential in quality control measures.
Calcareous Interlayer Causes and Logging Identification for the Shawan Formation of the Chunfeng Oilfield
Authors: Hou Qingjie , Jin Qiang , Li Weizhong , Lin Lamei , Jiang Wenmin , Han Wenjie
Published: May 2017

Background:

Many sets of calcareous interlayers are present in the Shawan Formation in the Chunfeng oilfield, which leads to scattered residual oil that is difficult to extract.

Objective:

Observations of core samples and thin sections, analyses of trace element compositions and interpretations of logging data were used to identify the calcareous interlayers and identify their possible origin.

Method:

First, the petrologic characteristics of the calcareous interlayers were identified; then, we developed a quantitative function for identifying the calcareous interlayers based on well log data. Finally, the possible origin of these calcareous interlayers was identified based on these findings.

Conclusion:

The results show that the quantitative function has a high accuracy of 91.8% and average uranium content of calcareous interlayers can reach as high as 27×10-6, indicating that the quantitative identification function provided accurate identification of the calcareous interlayers, and highly radioactive uranium is one explanation for the origin of the calcium cementation.
Is the Advanced Dental Admission Test (ADAT) the Metric Needed to Assist with Postgraduate Admissions? Two Viewpoints
Authors: Eidelman Alec S. , Whitmer Thomas
Published: May 2017

In 2012, when the National Board Dental Examination (NBDE) was changed from a numerical scoring system to pass/fail, advanced dental education programs lost a metric widely used for differentiating applicants to those programs. The American Dental Association (ADA) has developed the Advanced Dental Admission Test (ADAT) to address this issue. Implementation of the ADAT began in 2016 with a pilot program, which has not yet been widely accepted in the overall admissions process. This Point/Counterpoint explores the benefits and challenges of using the ADAT for postgraduate admissions. Viewpoint 1 supports use of the ADAT, arguing that the test provides a viable, long‐term solution to this immediate need. In contrast, Viewpoint 2 questions the need for and appropriateness of this additional academic measure for postgraduate admissions.
Change Is Here: ADEA CCI 2.0—A Learning Community for the Advancement of Dental Education
Authors: Palatta Anthony M. , Kassebaum Denise K. , Gadbury-Amyot Cynthia C. , Karimbux Nadeem Y. , Licari Frank W. , Nadershahi Nader A. , Walji Muhammad F. , Stewart Jeffery C.B. , Valachovic Richard W.
Published: May 2017

On May 12, 2005, the inaugural meeting of the American Dental Education Association Commission on Change and Innovation in Dental Education (ADEA CCI) was convened. Comprised of thought leaders representative of dental education and practice, the ADEA CCI published groundbreaking white papers that effectively helped bring dental education across the threshold of the 21st century. Twelve years later, a new ADEA CCI has been convened—ADEA CCI 2.0. The ADEA CCI 2.0 is a broad‐ranging, strategically interconnected, flexible, and multifarious community of stakeholders situated within and across all facets of oral health education and practice. Whereas the first iteration of the ADEA CCI made the case for change regarding revisions of the dental curriculum and learning environment, the ADEA CCI 2.0 will focus on external domains that are having a global impact on the content and delivery of health care and health professions education and, ultimately, how health care benefits people. The principal work of the ADEA CCI 2.0 will be to create educational and implementation resources and opportunities for dental educators to contemplate, investigate, and ultimately define the future needs of their academic dental institutions in this constantly changing world.
Impact of Faculty Development Workshops in Student‐Centered Teaching Methodologies on Faculty Members’ Teaching and Their Students’ Perceptions
Authors: Tricio Jorge A. , Montt Juan E. , Ormeño Andrea P. , Del Real Alberto J. , Naranjo Claudia A.
Published: May 2017

The aim of this study was to assess, after one year, the impact of faculty development in teaching and learning skills focused on a learner‐centered approach on faculty members’ perceptions of and approaches to teaching and on their students’ learning experiences and approaches. Before training (2014), all 176 faculty members at a dental school in Chile were invited to complete the Approaches to Teaching Inventory (ATI) to assess their teaching approaches (student‐ vs. teacher‐focused). In 2015, all 496 students were invited to complete the Study Process Questionnaire (R‐SPQ‐2F) to assess their learning approaches (deep or surface) and the Course Experience Questionnaire (CEQ) to measure their teaching quality perceptions. Subsequently, faculty development workshops on student‐centered teaching methodologies were delivered, followed by peer observation. In March 2016, all 176 faculty members and 491 students were invited to complete a second ATI (faculty) and R‐SPQ‐2 and CEQ (students). Before (2014) and after (2016) the training, 114 (65%) and 116 (66%) faculty members completed the ATI, respectively, and 89 (49%) of the then‐181 faculty members completed the perceptions of skills development questionnaire in September 2016. In 2015, 373 students (75%) completed the R‐SPQ‐2F and CEQ; 412 (83%) completed both questionnaires in 2016. In 2014, the faculty results showed that student‐focused teaching was significantly higher in preclinical and clinical courses than in the basic sciences. In 2016, teacher‐focused teaching fell significantly; basic science teaching improved the most. Students in both the 2015 and 2016 cohorts had lower mean scores for deep learning approaches from year 1 on, while they increased their scores for surface learning. The students’ perceptions of faculty members’ good teaching, appropriate assessment, clear goals, and e‐learning improved significantly, but perception of appropriate workload did not. Teaching and learning skills development produced significant gains in student‐centered teaching for these faculty members and in some students’ perceptions of teaching quality. However, student workload needs to be considered to support deep learning.
¡Fuera vallas!: Defendiendo la participación popular en las mascaradas-cimarronas costarricenses desde una perspectiva corporeizada de la experiencia musical
Authors: Chacón Solís Liliana Alicia
Published: May 2017

Este trabajo pretende recoger argumentos del campo de la cognición musical corporeizada que defiendan la importancia de respetar la naturaleza participativa de las mascaradas-cimarronas costarricenses. Específicamente, se revisan los trabajos de Hagen y Bryant (2003), Gallese, Eagle y Migone (2007), Rizzolatti y Fabbri Destro (2008), Cross (2008, 2010), Jacquier y Martínez (2014), Leman (2010), Martínez (2008, 2014), Merker y otros (2009), van Noorden (2010), y Johnson (2007).
Universalismo, cosmopolitismo y política editorial en revistas culturales del siglo XX
Authors: Moreno Herrera Francy Lilana
Published: May 2017

Las revistas Sur (Buenos Aires 1930-1970), Orígenes (La Habana 1944-1956), Ciclón (La Habana 1955-1957/1959) y Mito (Bogotá 1955-1962) convivieron en el escenario latinoamericano de mediados del siglo xx. Para la tradición cultural, estas revistas se destacaron por ser referentes de novedad cosmopolita. Este trabajo indaga en los criterios que modelaron sus cosmopolitismos y que determinaron la importación y exportación de autores y obras. En el análisis salen a la luz tensiones ideológicas y tomas de posición que fueron decisivas para la configuración de sus originales dibujos del mundo.
Uso do atributo amplitude instantânea do dado gpr na avaliação do teor de umidade de solos e sedimentos
Authors: Prado Renato Luiz , Barbosa Emílio Eduardo Moreira , Mendes Rodolfo Moreda , Marinho Fernando Antônio Medeiros , Oliveira Orlando Martini de
Published: May 2017

Este trabalho apresenta os resultados de um estudo realizado em escala de laboratório e de campo visando à análise do parâmetro amplitude da onda eletromagnética na avaliação qualitativa dos teores de umidade dos solos. Foram obtidas correlações empíricas entre o parâmetro amplitude instantânea da onda, registrada pelo radar de penetração no solo – GPR, e os valores de umidade volumétrica de sedimentos obtidos por reflectômetro no domínio do tempo – TDR, em experimento de laboratório, como também de amostras de solos, em experimento de campo. Os resultados indicaram que há forte correspondência entre os teores de umidade do meio e o parâmetro amplitude instantânea da onda eletromagnética. Em condições controladas de laboratório, a correlação apresentou forte coeficiente dedeterminação, mas no experimento de campo o coeficiente foi de apenas 0,64 devido ao pequeno número de dados empregados na correlação. O método é de fácil implementação, através de um fluxograma de processamento de rápida execução, e seus resultados podem ser usados complementarmente aos obtidos da análise do atributo velocidade.
Comparação entre as técnicas multivariadas maf e pca aplicadas na classificação de eletrofácies
Authors: Drummond Rodrigo Duarte , Vidal Alexandre Campane
Published: May 2017

Uma grande quantidade de dados é obtida durante o desenvolvimento de um campo de petróleo. Dados sísmicos, perfis de poços, dados de testemunho e de produção, todos contribuem para uma melhor caracterização e modelagem dos reservatórios. Vários métodos de análise multivariada de dados podem ser usados na interpretação destes dados, auxiliando em tarefas importantes como a identificação de fácies litológicas. O mais conhecido e largamente utilizado dentre estes métodos é a Análise de Componentes Principais (PCA, Principal Component Analysis ), a qual busca reduzir a dimensão dos dados mantendo o máximo possível de sua variância. A redução da dimensão dos dados também pode ser realizada com o método de Fatores de Máxima Autocorrelação (MAF,Maximum Autocorrelation Factors ), o qual procuramanter o máximo possível da autocorrelação espacial presente nos dados. Neste trabalho, ambos os métodos foram aplicados a dados de perfis de poços do Campo de Namorado, testando seu desempenho na classificação de eletrofácies. Após a redução na dimensão dos dados, os métodos de classificação supervisionada conhecidoscomo k-vizinhos mais próximos (k-NN, k-nearest neighbors ) e k-vizinhos mais próximos ponderados (wk-NN, weighted k-nearest neighbors ) foram aplicados aos dados, e os resultados obtidos foram comparados por validação cruzada. MAF mostrou ser mais eficiente que PCA para reduzir a dimensão dos dados mantendo a informação mais relevante e wk-NN teve desempenho um pouco melhor na classificação de eletrofácies em relação ao k-NN usual. De acordo com esses resultados, a combinação de MAF e wk-NN pode ser uma ferramenta valiosa para a classificação de fácies em poços n˜ao testemunhados a partir de seus perfis.
Corrigendum: https://doi.org/10.2298/TSCI150722093S by Simeon Oka, Editor-in-Chief of the journal Thermal Science request that it is necessary to correct affiliations of the authors
Authors: Editorial E
Published: May 2017

Simeon Oka, Editor-in-Chief of the journal Thermal Science request that it is necessary to correct affiliations of the authors of the paper HEAT AND MASS TRANSFER EFFECTS ON NATURAL CONVECTION FLOW ALONG A HORIZONTAL TRIANGULAR WAVY SURFACE by Sadia SIDDIQAa*, M. Anwar HOSSAINb, and AQSAc published in the journal Thermal Science, Vol. 21, Year 2017, No. 2, pp. 977-987 since by technical error of the Editorial staff, affiliations of the authors are not correctly written. Sadia SIDDIQAa*, M. Anwar HOSSAINb, and AQSAa aDepartment of Mathematics, Quaid-e-Azam University, Islamabad, Pakistan bDepartment of Mathematics, University of Dhaka, Dhaka, Bangladesh has to be written: Sadia SIDDIQAa*, M. Anwar HOSSAINb, and AQSAc a Department of Mathematics, COMSATS Institute of Information Technology, Attock, Pakistan b Department of Mathematics, University of Dhaka, Dhaka, Bangladesh c Department of Mathematics, Quaid-e-Azam University, Islamabad, Pakistan.

 Link to the corrected article 10.2298/TSCI150722093S
Production inventory model with disruption considering shortage and time proportional demand
Authors: Khedlekar U.K. , Namdeo A. , Nigwal A.
Published: May 2017

The disruption in a production system occurs due to labor problem, machines breakdown, strikes, political issue, and weather disturbance, etc. This leads to delay in the supply of the products, resulting customer to approach other dealers for the products. This paper is an attempt to develop an economic production quantity model using optimization method for deteriorating items with production disruption. We obtained optimal production time before and after the system gets disrupted. We have also devised the model for optimizing the shortage of the products. This research is useful to determine the time for start and stop of the production when system gets disrupted. The optimal production and inventory plan are provided, so that the manufacturer can reduce the loss occurred due to disruption. Finally a graph based simulation study has been given to illustrate the proposed model.
Overexpression of Kinase-Dead mTOR Impairs Glucose Homeostasis by Regulating Insulin Secretion and Not β-Cell Mass
Authors: Alejandro Emilyn U. , Bozadjieva Nadejda , Blandino-Rosano Manuel , Wasan Michelle Ann , Elghazi Lynda , Vadrevu Suryakiran , Satin Leslie , Bernal-Mizrachi Ernesto
Published: May 2017

Regulation of glucose homeostasis by insulin depends on β-cell growth and function. Nutrients and growth factor stimuli converge on the conserved protein kinase mechanistic target of rapamycin (mTOR), existing in two complexes, mTORC1 and mTORC2. To understand the functional relevance of mTOR enzymatic activity in β-cell development and glucose homeostasis, we generated mice overexpressing either one or two copies of a kinase-dead mTOR mutant (KD-mTOR) transgene exclusively in β-cells. We examined glucose homeostasis and β-cell function of these mice fed a control chow or high-fat diet. Mice with two copies of the transgene [RIPCre;KD-mTOR (Homozygous)] develop glucose intolerance due to a defect in β-cell function without alterations in β-cell mass with control chow. Islets from RIPCre;KD-mTOR (Homozygous) mice showed reduced mTORC1 and mTORC2 signaling along with transcripts and protein levels of Pdx-1. Islets with reduced mTORC2 signaling in their β-cells (RIPCre;Rictorfl/fl) also showed reduced Pdx-1. When challenged with a high-fat diet, mice carrying one copy of KD-mTOR mutant transgene developed glucose intolerance and β-cell insulin secretion defect but showed no changes in β-cell mass. These findings suggest that the mTOR-mediated signaling pathway is not essential to β-cell growth but is involved in regulating β-cell function in normal and diabetogenic conditions.
Prevalence of Celiac Disease in 52,721 Youth With Type 1 Diabetes: International Comparison Across Three Continents
Authors: Craig Maria E. , Prinz Nicole , Boyle Claire T. , Campbell Fiona M. , Jones Timothy W. , Hofer Sabine E. , Simmons Jill H. , Holman Naomi , Tham Elaine , Fröhlich-Reiterer Elke , DuBose Stephanie , Thornton Helen , King Bruce , Maahs David M. , Holl Reinhard W. , Warner Justin T. ,   on behalf of the Australasian Diabetes Data Network (ADDN),   the T1D Exchange Clinic Network (T1DX),   the National Paediatric Diabetes Audit (NPDA) and the Royal College of Paediatrics and Child Health,   the Prospective Diabetes Follow-up Registry (DPV) initiative
Published: May 2017

OBJECTIVE

Celiac disease (CD) has a recognized association with type 1 diabetes. We examined international differences in CD prevalence and clinical characteristics of youth with coexisting type 1 diabetes and CD versus type 1 diabetes only.

RESEARCH DESIGN AND METHODS

Data sources were as follows: the Prospective Diabetes Follow-up Registry (DPV) (Germany/Austria); the T1D Exchange Clinic Network (T1DX) (U.S.); the National Paediatric Diabetes Audit (NPDA) (U.K. [England/Wales]); and the Australasian Diabetes Data Network (ADDN) (Australia). The analysis included 52,721 youths <18 years of age with a clinic visit between April 2013 and March 2014. Multivariable linear and logistic regression models were constructed to analyze the relationship between outcomes (HbA1c, height SD score [SDS], overweight/obesity) and type 1 diabetes/CD versus type 1 diabetes, adjusting for sex, age, and diabetes duration.

RESULTS

Biopsy-confirmed CD was present in 1,835 youths (3.5%) and was diagnosed at a median age of 8.1 years (interquartile range 5.3–11.2 years). Diabetes duration at CD diagnosis was <1 year in 37% of youths, >1–2 years in 18% of youths, >3–5 years in 23% of youths, and >5 years in 17% of youths. CD prevalence ranged from 1.9% in the T1DX to 7.7% in the ADDN and was higher in girls than boys (4.3% vs. 2.7%, P < 0.001). Children with coexisting CD were younger at diabetes diagnosis compared with those with type 1 diabetes only (5.4 vs. 7.0 years of age, P < 0.001) and fewer were nonwhite (15 vs. 18%, P < 0.001). Height SDS was lower in those with CD (0.36 vs. 0.48, adjusted P < 0.001) and fewer were overweight/obese (34 vs. 37%, adjusted P < 0.001), whereas mean HbA1c values were comparable: 8.3 ± 1.5% (67 ± 17 mmol/mol) versus 8.4 ± 1.6% (68 ± 17 mmol/mol).

CONCLUSIONS

CD is a common comorbidity in youth with type 1 diabetes. Differences in CD prevalence may reflect international variation in screening and diagnostic practices, and/or CD risk. Although glycemic control was not different, the lower height SDS supports close monitoring of growth and nutrition in this population.
Microstructure and wear resistance of laser cladding particulate reinforced Fe-based composite coating on railway steel
Authors: He Hua , Zhang Ting , Ma Mingxing , Liu Wenjin
Published: May 2017

It has been proved that the laser cladding particulate reinforced metal-based composite coating is of great benefit to industrial applications, owing to its superior properties such as wear resistance, corrosion resistance, and metallurgical bond with a base metal. It is also well-known that the railway switch can easily get damaged due to the abominable conditions of high speed and heavy haul in the rail-wheel mechanical system, and it can cause quite huge loss every year. So, it is of great significance to increase the wear resistance of railway switch steel. In this study, particulate reinforced Fe-based composite coatings were produced on the high carbon manganese rail steel (U71Mn) by laser cladding. The coatings' properties, such as microstructure, microhardness, and wear resistance, were investigated. The wear scar appearance was also detected using a white light interferometer. The results reveal that the composite coatings with good formation and a typical in situ particulate reinforced microstructure can be obtained in proper processing ways. The microhardness of laser cladding coatings reaches HV 750 to HV 800, while the average microhardness of railway steel without laser treatment is HV 390. Furthermore, the properties of wear resistance of the laser cladding coatings have increased by nearly eight times when compared to the untreated railway steel specimen. The adhesion strength of the coatings to the substrate reaches 88% of the shearing strength of the railway steel.
Growing of bulk sapphire single crystals using laser material deposition
Authors: Wilms M. B. , Biermann T. , Rolink G. , Weisheit A. , Poprawe R.
Published: May 2017

A device to grow oxide single crystals via powder based laser additive manufacturing has been built and successfully tested. Single crystals of sapphire as demonstrator materials have been grown to prove the ability of this technique. A sapphire seed disk with a diameter of 25.4 mm is heated in a high temperature furnace up to 1550 °C. Through a hole of the furnace-lid, the seed disk is irradiated by CO2 laser radiation. Simultaneously, Al2O3 powder is fed into the furnace via ceramic tubes. The molten material solidifies on the seed material with exactly the same crystallographic orientation, thus retaining the single crystal structure. A crack free single crystal of a few millimeters in height is produced.
Keamanan Manusia dalam Perspektif Studi Keamanan Kritis Terkait Perang Intra-Negara
Authors: Hidayat Rizal Adhitya
Published: May 2017

Tulisan ini didasari dari persoalan keamanan manusia yang dikaji melalui pendekatan studi keamanan kritis sebagai sebuah kritik ontologis dan epistemologis mengenai negara sebagai obyek referen keamanan. Kritik tersebut bermuara dari pengembangan lebih luas dari pendekatan studi keamanan Copenhagen School yang dipelopori oleh Buzan, Weaver dan de Wilde (1998) melalui analisis sektor keamanan dan konsep sekuritisasi. Kedua hal inilah yang kemudian ditanggapi oleh kelompok pendekatan Studi Keamanan Kritis dalam Aberystwyth/Wales School dan Toronto School yang mengajukan tiga klaim pertanyaan ontologis seputar konsep keamanan yang sebenarnya dan nyata. Ketiga klaim tersebut mencakup: what is real (of security)?, what is knowledge (of security)?, what (security) is to be done?. Melalui relevansinya dalam konflik/perang intra-state, maka klaim akan konsep keamanan menemukan momentumnya bahwa ancaman keamanan dalam konflik/perang intra-state, bisa muncul terhadap segala aspek kehidupan manusia dan kemudian melahirkan ancaman keamanan yang sebenarnya dan nyata terhadap keamanan kehidupan manusia seutuhnya.