bluuebunny/crossref_metadata_2025 huggingface dataset:
ЗАКОНОМІРНОСТІ РОСТУ ТА ФОРМУВАННЯ М’ЯСНОЇ ПРОДУКТИВНОСТІ КРОЛІВ М’ЯСНОГО НАПРЯМУ ЗА КОМБІНОВАНОГО ТИПУ ГОДІВЛІ
Authors: Аксьонов Є.О. , Корх O.В. , Петраш В.C.
Published: April 2020

В статті висвітлено результати оцінки закономірностей та особливостей росту тварин, формування м’ясної продуктивності та її якості в постнатальний період (у віці 1–30–45–60–90–120–150 діб) у кролів м’ясного напряму продуктивності за комбінованого типу годівлі. Встановлено, що найвища енергія росту тварин простежується в період 90 діб. Так абсолютний приріст у цей період складає 1119,7 грами. Зростання маси новонародженого по відношенню до дорослої тварини у 4–5 місячному віці складає відповідно 45–55 рази. Визначено, що як довжина тулуба, так і обхват грудей за лопатками впродовж всього досліджуваного періоду збільшувалися пропорційно. Так, довжина тулуба у 4 і 5 місячному віці становила 52,0 та 54,1 см, порівняно з місячним віком цей показник збільшився у 1,8 і 1,9 рази. Найбільшою масою в усі вікові періоди характеризується печінка, легені та нирки. Впродовж дослідного періоду частка печінки, відносно маси тулуба, становила від 3,4 до 4,4 %. Дещо менша частка у формуванні ліверу припадає на нирки 0,4-0,6 % та легені 0,4-0,7 %. Встановлено, що найвищим показником зростання всіх частин тулуба характеризувався період від 120 до 150 добового віку. Найвищою інтенсивністю росту за весь період характеризувалися маса вух, шкурки та задніх лап. З народження й до 150 діб їх маса збільшилася у 48,0, 44,2 і 42,5 рази. Слід вказати, що основна частка в формуванні м’ясної продукції належить м’язовій тканині, найбільший її приріст у 3 місяці і складає 75,3 відсотки відносно маси тушки з жиром без голови і ліверу, г. Окрім цього визначено показник забійного виходу. Встановлено, що із збільшенням віку кролів зростає і показник забійного виходу, найвищим він був у 5 місяців і складав відповідно 49 відсотків. Проведено визначення якості м’ясної продукції шляхом дослідження зразків м’яса дослідних кролів за хімічними та технологічними показниками. Результати лабораторних досліджень зразків м’яса кролів у різні періоди вказують на ріст кількості білку та жиру із збільшенням віку. Найбільше значення білку виявлено у 150 добових кролів 20,6 %, жир 6,4 % відповідно. Неоднакова кількість білка і жиру в різні вікові періоди кроленят обумовлюють і відповідне співвідношення між цими частинами м’яса. Найбільша кількість білка на одиницю жиру припадає при забої кроленят в 90 діб і становить відповідно 3,6:1. З технологічних показників, які характеризують тушку і м’ясо визначено вологоутримуючу здатність. Із зростанням віку забою кролів значення цього показника збільшувалося і у 5 місяців він був рівні 61,2 %. Визначено проміри шкурок у різні вікові періоди. Площа шкурки у віці 90 діб становила 1647,4 см² та відносилася до групи великих шкурок і до 120 та 150 добового віку зросла у 1,0 і 1,1 рази, що становило 1720,6 і 1814,0 см². Вихід готової продукції у кролівництві в значній мірі залежить від довжини, ширини і площі шкурки. В результаті проведених досліджень встановлено, що із збільшенням довжини тулуба та обхвату грудей за лопатками відбувалося і збільшення довжини та ширини шкурки
An approach for the mass propagation of Cupressus sempervirens L. (Cupressaceae), for quality propagule production
Authors: Pericleous Constantinos , Eliades Nicolas-George
Published: April 2020

The scenarios of climate change in Mediterranean regions bring back the need for tree species tolerant to drought and disease, for agro- and urban-forestry purposes, landscape rehabilitation, as well as for post-fire and quarry restoration plans. Therefore, forest industries focus on selecting, propagating and growing superior trees. The Cupressus sempervirens L. is such a coniferous tree species, with a fundamental ecological, financial and ornamental role in the Mediterranean region. The aim of this study was to develop an efficient macropropagation protocol, which would lead to mass-selected genotypes or phenotypes of C. sempervirens f. sempervirens. For this purpose the axillary shoot multiplication method was used, by adopting both cutting propagation and intermittent mist methods. These methods were used for the first time in the macropropagation of C. sempervirens f. sempervirens. For shoot proliferation, 24 different modified macropropagation treatments at different concentrations and combinations were tested: shoot cuttings, concentrations of K-IBA and rooting systems. The elongation and root induction was carried out in an intermittent mist system for 50 days, then the new plantlets were moved for acclimatization for 15 days in a greenhouse. The current workflow presents an effective preliminary protocol with clear steps and treatments for macropropagation of C. sempervirens f. sempervirens. The developed protocol for macropropagation of tree species ensures cost- and time-efficient propagation. Produced plantlets were developed efficiently under in vivo conditions, allowing to propagate and store genetic material for conservation and domestication. This protocol can be generated for other tree species of the Cupressus genus and the Cupressaceae family.
The complete mitochondrial genome sequence of Scolopendra mutilans L. Koch, 1878 (Scolopendromorpha, Scolopendridae), with a comparative analysis of other centipede genomes
Authors: Hu Chaoyi , Wang Shuaibin , Huang Bisheng , Liu Hegang , Xu Lei , Hu Zhigang , Liu Yifei
Published: April 2020

Scolopendra mutilansL. Koch, 1878 is an important Chinese animal with thousands of years of medicinal history. However, the genomic information of this species is limited, which hinders its further application. Here, the complete mitochondrial genome (mitogenome) ofS. mutilanswas sequenced and assembled by next-generation sequencing. The genome is 15,011 bp in length, consisting of 13 protein-coding genes (PCGs), 14 tRNA genes, and two rRNA genes. Most PCGs start with the ATN initiation codon, and all PCGs have the conventional stop codons TAA and TAG. TheS. mutilansmitogenome revealed nine simple sequence repeats (SSRs), and an obviously lower GC content compared with other seven centipede mitogenomes previously sequenced. After analysis of homologous regions between the eight centipede mitogenomes, theS. mutilansmitogenome further showed clear genomic rearrangements. The phylogenetic analysis of eight centipedes using 13 conserved PCG genes was finally performed. The phylogenetic reconstructions showed Scutigeromorpha as a separate group, and Scolopendromorpha in a sister-group relationship with Lithobiomorpha and Geophilomorpha. Collectively, theS. mutilansmitogenome provided new genomic resources, which will improve its medicinal research and applications in the future.
La spéculation freudienne dans l’Au-delà du principe de plaisir, entre fable et fiction
Authors: Alfandary Isabelle
Published: April 2020

Dans sa spéculation biologique de l ’Au-delà du principe de plaisir , Freud recourt à plusieurs reprises à la fable et à la fiction. Ce fait constitue en soi un problème et une énigme pour le lecteur aussi bien que pour son auteur et pèse lourd sur la réception d’un essai qui a divisé la communauté analytique. Pourquoi Freud en passe-t-il par la fable ou la fiction pour soutenir l’hypothèse de la pulsion de mort ? Le présent article examine le sens d’un détour stratégique et heuristique par le discours poétique, le statut de la fiction comme schème ainsi que la fonction de la littérature dans l’essai de 1920.
Le rêve, les neurosciences cognitives et la psychanalyse
Authors: Ruby Perrine
Published: April 2020

L’Histoire montre que psychanalyse et neurosciences se sont toujours craintes et affrontées. Freud est pourtant une figure de la réunion de ces deux disciplines qui ont toutes les raisons de faire bon ménage, puisque la compréhension de la psyché de l’Homme est leur objectif commun. Le rêve, comme l’inconscient et la mémoire, sont des sujets qui bénéficieraient particulièrement des apports complémentaire, des deux disciplines. Dans l’état actuel des connaissances, la définition du rêve évolue encore beaucoup avec les résultats de la recherche qui peine à progresser tant le rêve échappe, presque intrinsèquement, à l’observation. Plusieurs initiatives ont montré les bénéfices de la collaboration entre neurosciences et psychanalyse, il faudrait qu’elles se développent. Notons, par exemple, que l’hypothèse d’un rôle du rêve dans la régulation émotionnelle est encouragée par plusieurs résultats des neurosciences cognitives, tout en étant compatible avec la vision psychanalytique du rêve. Voilà un terrain de rapprochement rêvé.
Zone de contact autour d’histoires d’objets mal acquis
Authors: Cadet Emmanuelle
Published: April 2020

L’association Alter Natives a voulu mobiliser autour des enjeux de la restitution d’objets africains des personnes peu enclines à fréquenter les musées qui les conservent. L’expérience se nomme Zone de contact/Objets d’ailleurs . Il s’agit pour des jeunes franciliens d’entrer dans les réserves des musées, de choisir certains objets d’origine non européenne, d’enquêter sur leur biographie pour savoir d’où ils viennent et d’être en mesure d’expliquer leur parcours au reste de la population. Dans ce projet de long terme, ancré sur des territoires divers, la restitution des objets mal acquis n’est donc pas le mobile principal. Ces actions permettent de tester des outils pour établir un autre type de rapport aux savoirs et développer une relation directe avec les populations dont sont issues ces objets, dans leurs pays d’origine, d’Afrique essentiellement.
Promoting Social Cohesion: The Development of E-Learning Management System Materials through Life Based Learning for Sociology of Religion Course
Authors: Widianto Ahmad Arif , Purwasih Joan Hesti Gita , Perguna Luhung Achmad
Published: April 2020

The development of information and communication technology (ICT) encourages learning transformation to maximize it. Some transformations are through the development of E-Learning Management System (E-LMS). This paper explained the development of E-LMS material which is integrated with Life Based Learning in sociology of religion course. It integrated with life-based learning model through the ADDIE method which consists of Analysis, Design, Development, Implementation and Evaluation. The material was developed by a student group in the form of videos and thematic learning modules based local wisdom. The results of validation and evaluation showed the development can improve the effectiveness and interaction of learning through asynchronous learning in E-LMS. The developed material can improve students understanding of the religious practices and local wisdom of the community. Through life-based learning, students can construct knowledge and make it happen in the learning media produced. In the other hands, the media product that has been produced and validated can be one of the products can be applied in the process of sociology of religion
Using SPADA Brightspace to Enhance Pedagogical Skills in Teacher Professional Program
Authors: Kurniawan Bayu , Purnomo Agus , Idris Idris , Adi Khofifatu Rohmah , Eskassnanda I Dewa Putu
Published: April 2020

SPADA Brightspace is an e-learning platform designed for online Teacher Professional program learning activities. This platform has become a virtual learning environment with no boundaries of space and time between educators and students for a long time. It is equipped with various learning features and learning progress recorded by the system. This paper aims to determine the effectiveness of using SPADA Brightspace in improving pedagogical skills of participants in the Teacher Professional program. This research uses a quantitative approach using One Group Pretest-Posttest Design. Also, the effectiveness was measured by the result of pre and post-test given to the participants based on several indicators such as the ability to design course plan (RPP), to compile teaching materials, to produce learning media, to create student activity sheets (LKPD), and to make evaluation instruments. By using descriptive statistical analysis, this study found that the SPADA Brightspace platform was effectively used for improving pedagogical skills of participants.
From Content to Context: Understanding Introduction to Sociology through MOOC
Authors: Perguna Luhung Achmad , Idris Idris , Irawan Irawan
Published: April 2020

This study aims to provide interactive, active participatory and collaborative media for learners through MOOC in the Introduction to Sociology course. This paper presents alternative learning by utilizing MOOC-based information technology as one way to achieve learning objectives. This development uses research and development (R&D) with development steps consisting of preproduction, production, and postproduction. This development was also validated and implemented during the development process. This study found that development products are feasible to be implemented as learning products. In addition, the results of the implementation test also showed that the use of MOOC media through the development of context-based video learning can improve student understanding more easily, more effectively, and more efficiently. Thus, this development product can be one of the learning media that can be used in the sociology learning process.
Speaker Awareness for Speech Emotion Recognition
Authors: Assunção Gustavo , Menezes Paulo , Perdigão Fernando
Published: April 2020

The idea of recognizing human emotion through speech (SER) has recently received considerable attention from the research community, mostly due to the current machine learning trend. Nevertheless, even the most successful methods are still rather lacking in terms of adaptation to specific speakers and scenarios, evidently reducing their performance when compared to humans. In this paper, we evaluate a largescale machine learning model for classification of emotional states. This model has been trained for speaker iden- tification but is instead used here as a front-end for extracting robust features from emotional speech. We aim to verify that SER improves when some speak- er’s emotional prosody cues are considered. Experiments using various state-of- the-art classifiers are carried out, using the Weka software, so as to evaluate the robustness of the extracted features. Considerable improvement is observed when comparing our results with other SER state-of-the-art techniques.
Prediction of the Remaining Useful Life of Aircraft Systems via Web Interface
Authors: Azevedo Daniel , Ribeiro Bernardete , Cardoso Alberto
Published: April 2020

In this work a web-based tool is presented for the simulation of a Prognostics and Health Management (PHM) system used for exploring and testing different machine learning experimental scenarios with the goal of predicting the Remaining Useful Life (RUL) of aircraft systems. With this tool, the user can select a set of options like the datasets to use, its size, the machine learning method to apply for the RUL prediction and the metrics used for comparing the results. The proposed datasets correspond to public data extracted from a model which aims to simulate a Turbofan Engine dataset of an aircraft. Also, three different State of the Art machine learning techniques are made available to be applied and tested: a Similarity-based, a Neural Network-based and an Extrapolation-based approach. The results obtained by the different approaches can be graphically compared in the web interface. As the methods are executed remotely, the user incurs no computational costs, which constitutes an advantage of using this tool. This web tool aims to be a user-friendly interface used for simulating online experiments regarding the RUL prediction.
Augmented Shared Spaces: An Application for Exposure Psychotherapy
Authors: Patrão Bruno , Menezes Paulo , Gonçalves Nuno
Published: April 2020

The latest advances in computational power of small portable devices enables the development of new forms of Augmented Realities, namely Augmented Reality Shared Spaces. In this work, we will explore this technolo- gy to improve the collaborative work between people in the same physical space allowing them to share and visualise virtual contents. The idea is to have a 3D scene shared between several people where everyone can see and interact with and explore its use in psychotherapy context. These live interactions can also be used to improve the quality of collaborative work by presenting in real time ideas and thoughts of any participant directly on top of the 3D model. In the case of a psychotherapy session typically patients describe their feelings and fears to the therapist. This may be centred on virtual representations of their phobic elements, supporting interactions with them, being those actions and re- sults observable by both in their shared space. Our main goal is to apply and evaluate this concept, specially in exposure-based therapies, where it is im- portant for the therapist to control and manipulate the scene that the patient is exposed to in order to obtain the desired emotional activations.
A Federation of Remote Laboratory OERs: Grid of VISIR systems through PILAR Project
Authors: Loro Felix Garcia , Blazquez Manuel , Baizan Pablo , Plaza Pedro , Macho Alejandro , Orduña Pablo , Fernandez Ricardo-Martin , San Cristobal Elio , Castro Manuel
Published: April 2020

Today's educational needs require tools with neither geographical nor temporal restrictions. These tools also have to help students to reach the knowledge and provide them with the skills that the labor market demands. To achieve this goal, the technical areas rely on the contribution that laboratory practices provide. However, traditional laboratory practices, carried out in person at the institution, are limited due to the requirements of both their exploitation and their provision. For this reason, educational institutions have opted for remote laboratories (RLs) as the educational tool to provide the benefits of experimentation in real environments, either as an accompaniment to face-to-face activity or as the only mean of experimentation in real environments. Although RLs provide exclusive benefits <<24/7 availability, integration of Information and Communication Technologies (ITCs), etc.>>, they also present limitations derived from the technology involved <>; PILAR project << Platform Integration of Laboratories based on the Architecture of VISIR>> was conceived under this premise. PILAR proposes a federation of 5 Virtual Instrument Systems in Reality (VISIR) systems. VISIR is a RL for wiring and measuring electrical and electronics circuits in a simulated workbench. PILAR aims to create a grid of laboratories shared and accessed by all participants, expanding and empowering the existing systems to a new level of service and capacity.
Online Experimentation for Industrial, Health and Educational Purposes
Authors: Cardoso Alberto , Restivo Maria Teresa
Published: April 2020

The Special Issue of the International Journal of Online and Biomedical Engineering (iJOE) is publishing extended versions of interesting papers presented at the Experiment@International Conference 2019 (exp.at’19), dedicated to online experimentation.
Applicability of Wiedemann-Franz Law to Thermal Conductivity of Molten Field’s Metal
Authors: Mizuno Nobuyuki , Kosai Shoki , Yamasue Eiji
Published: April 2020

The thermal conductivity of metals and alloys is an important physical property. The thermal conductivity of metals and alloys in the liquid state is usually hard to be measured, because it is difficult to exclude the effect of convection. As such, as a convenient approach, the Wiedemann-Franz law has been used for the estimation of thermal conductivity of metals and alloys in the liquid state. However, some reports show the deviation from Wiedemann-Franz law of pure Sn and Sn-based metals in the liquid state. Measuring the thermal conductivity of various Sn-based alloys in the liquid state is of significant importance to identify its heat transfer in terms of whether the deviation from Wiedemann-Franz law is observed. In this study, Field’s metal is focused on as one of the Sn-based alloys. Then, its thermal conductivity in the solid and liquid states with various temperature ranges by employing the transient hot wire method. This method is appropriate due to its nature of dealing with the convection-including problems. Finally, the adaptability of Wiedemann-Franz law is analyzed by using the obtained thermal conductivity and electric conductivity data. In this study, the deviation from Wiedemann-Franz law was observed in the liquid state.
Microstructure and Catalytic Activity of Melt Spun Al-Cu-Fe Ribbons
Authors: Litynska-Dobrzyńska Lidia , Stan-Glowinska Katarzyna , Wójcik Anna , Duraczyńska Dorota , Serwicka Ewa M.
Published: April 2020

The Al65Cu20Fe15 (in at.%) rapidly solidified ribbon in the form of brittle flakes was produced by melt-spinning technique. It consists the cell or dendrites of the icosahedral quasicrystalline I-phase surrounded by copper rich cubic τ-Al(Cu, Fe). The pulverized ribbon (fraction <32 μm) was subjected to NaBH4 or 20% aqueous NaOH treatment, which led to the formation of oxide in the form of thin flakes at the outer layer of the powder particles. Test of the catalytic properties of the as spun ribbon and powder before and after treatment was made in the reaction of phenylacetylene hydrogenation. It was shown that for as received ribbon, even at very mild conditions (60 °C, H2 pressure of 5 bar), 40% of phenylacetylene was converted to hydrogenation products with 0.7 styrene/ethylbenzene ratio. The use of pulverized ribbon resulted in improvement of activity, with the same ratio of reaction products. The effect of treatment with NaBH4 led to improvement of the catalyst activity, while strongly alkaline solution of NaOH worsened significantly the catalytic activity, but improved selectivity to styrene (styrene/ethylbenzene=1.2).
Synthesis of Ordered Mesoporous Carbon from Vietnam Natural Kaolin Clay for Supercapacitor Application
Authors: Chu Nam T. H. , Ngo Quang L.D. , Le Hang T.T.
Published: April 2020

In nature, kaolin clay is referred to a readily available cheap source of silicon and used in various fields such as the paper, ceramic, paint, plastic, rubber, and cracking catalyst industries. This paper introduces utilization of natural kaolin clay for a new application. In particular, the kaolin clay is used as a new raw material for synthesis of ordered mesoporous carbon (OMC) materials, which serve as electrode active materials for supercapacitors. Kaoline used in the present work is originated from Yen Bai province (Vietnam). After subjected several steps of the treatment process, silica present in the kaolin clay is converted to sodium silicate and used directly as a source of silicon for the synthesis process of mesoporous porous silica (SBA-15). The synthesized SBA-15 mesoporous silicas exhibit rod-like nanostructure with the specific area of 432.7 m2 g-1 and the mean pore size of 7-8 nm. Subsequently, SBA-15 silica serves as hard template for preparation of OMCs by using nanocasting method. The OMCs carbonized at different temperatures in the absence and presence of boric acid reveal highly ordered mesoporous structure with the highest specific area of 1039.2 m2 g-1 and the mean pore size ranging from 6 to 7 nm. As used as electrode active material in 6 M KOH aqueous solution, the resultant OMCs exhibit excellent capacitive performance with a specific capacitance higher than 80 F g-1 at a scan rate of 5 mV s-1. The obtained results show that, in addition to the high specific area, the electrical conductivity also plays an important role in enhancing energy storage ability of the OMC electrodes. At the same carbonization temperature, the high surface area plays crucial role. However, at the higher carbonization temperatures, effect of the electrical conductivity of the materials prevails over the high surface area. This study illustrates highly application feasibility of Vietnam natural kaolin clay as available and cheap raw material source for synthesis of electrode active materials with the high supercapacitive performance for electrochemical double layer capacitors.
Influence of Ag Doping on the Electrochemical Supercapacitor Characteristics of Manganese Dioxide Prepared by Pulsed Potentiostatic Electrodeposition
Authors: Huyen Thi Thanh Bui , Nguyen Anh N. , Nguyen Duong T. , Hoang Thuy Thi Bich
Published: April 2020

Manganese dioxide (MnO2) is a promising electrode material for electrochemical supercapacitor applications due to its low cost, eco-friendly and high theoretical specific capacitance in a wide potential window. In this study, MnO2 and Ag-doped MnO2 are prepared by cathodic electrodeposition on graphite substrate from electrolyte with the main compound of potassium permanganate using pulse potentiostatic technique. The effect of Ag doping on the morphology, structure and electrochemical properties of MnO2 materials are investigated. Scanning electron microscopy (FESEM), Energy Dispersive X-ray Spectroscopy (EDX), cyclic voltammetry (CV), galvanostatic charge-discharge measurement and electrochemical impedance spectroscopy (EIS) are used for characterization of the prepared materials. The results show that doping Ag into the MnO2 structure has improved electrochemical characteristics of materials. The specific capacitances are calculated for pure MnO2 and Ag-doped MnO2 to be 272.84 and 277.48 F/g, respectively. The prepared materials exhibit the high charge-discharge stability, maintaining at about 92 % for MnO2 and 95 % for Ag-doped MnO2 after 500 cycles of the charge-discharge operation.
Effect of pH of Coating Solution on Adhesion Strength of Hydroxyapatite and Octacalcium Phosphate Coatings on AZ31 Magnesium Alloy
Authors: Tuyet Thi Anh Ngo , Hiromoto Sachiko , Nguyen Phong Ngoc , San Thi Pham
Published: April 2020

Hydroxyapatite (HAp) and octacalcium phosphate (OCP) coatings were formed on a Mg-3Al-Zn (AZ31) alloy with a chemical solution deposition method using a Ca-EDTA solution at various pH levels. The adhesion strength of the coatings was examined using the pull-off method. The microstructures of HAp and OCP coatings were measured X-ray diffraction (XRD). The morphology and composition of the surface and cross section of the samples before and after the adhesion test were characterized using scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), and a 3D profilometer. The results showed that plate-like OCP crystals grew from a continuous OCP layer on the surface of the AZ31 substrate in the case of a pH 6.3 coating solution. At pH values of 7.5 and 8.6, the HAp coating showed a two-layer structure with a HAp rod-like outer layer and a HAp continuous inner layer. Regardless of the pH of the coating solutions, a very thin Mg (OH)2 intermediate layer was formed between OCP or HAp coating and substrate. The highest adhesion strength of the coatings was 6.7±0.5 MPa, achieved at a coating solution pH value of 7.5. A part of Mg (OH)2 layer remained on the substrate, indicating that the delamination occurred in the Mg (OH)2 intermediate layer. The primary particles in the inner layer formed at pH 7.5 was smaller than those at pH 8.6. This result indicates that the initial corrosion of substrate AZ31 at pH 7.5 was more rapidly than that at pH 8.6, presumably leading to the formation of mixed layer of Mg (OH)2 and calcium phosphate. Further investigation is necessary to understand the better adhesion strength at pH 7.5 than that at pH 8.6. This good adhesion could be due to the flawless and rod-like uniform crystal, which had the densest and finest structure on the surface.
Formation of Heterostructure with Appearance of α-Al Phase in Hyper- and Eutectic Al-Si Alloys by Solidification at High Rate
Authors: Hai Nguyen Hong , Nguyen Quoc Tuan , Duc Le Minh
Published: April 2020

Normally, the microstructure of eutectic and hypereutectic Al-Si alloys consists of Al-Si eutectic or Al-Si eutectic + SiI, that is why they have good wear-resistance properties, but their ductility decreases somewhat, which can be improved by the appearance of non-equilibrium α-aluminum grains. In present work, a recrystallization and partial melting (RAP) technique was applied in the preliminary research to investigate the solidification behavior of the eutectics at high cooling rate. The results show that numerous α-Al dendrites appeared instead of the eutectic structure. In the followed researches, the combination of some technological procedures, based on the competitive growth of dendrites and eutectics, such as heterogeneous nucleation and high cooling rate, were applied: A413.0 and A390.0 alloys were melted in resistant furnace and poured into a mold, made of copper at one side and of steel at another, which is connected to the temperature measuring device via four K-class thermocouples. The various pouring regimes: gravity, via 450 tilt cooling slope and injection with Argon gas for 2 min. before pouring, were applied at different temperatures of 680, 650, 6300 C. The results show that the hetero-structure of eutectic and hyper-eutectic Al-Si alloys, consists of non-equilibrium α-Al grains, primary silicon and eutectics was obtained. Grain size varies with cooling rate, with minimum value of 10 μm when the specimen thickness is 5 mm. Non-dendritic grains were achieved with semi-solid treatment (pouring via cooling slope). The elongation of alloy is expected to be enhanced due to the appearance of α-Al grains.
Evaluation of the Material Properties of the Ti and CoCr Alloys Prepared by Laser Powder Bed Fusion
Authors: Bidulská Jana , Bidulský Róbert , Petrousek Patrik , Kvačkaj Tibor , Grande Marco Actis , Hudák Radovan
Published: April 2020

The main aim of the present paper is evaluated the mechanical properties, microstructures and porosity of Ti6Al4V and CoCrW alloys produced by Laser Powder Bed Fusion (L-PBF) as an additive manufacturing (AM) technology. The mechanical properties were follows: For Ti6Al4V alloy the UTS was 1180 MPa; the YS was in the range <600; 745 MPa>. For CoCrW alloys, the UTS were in range <750; 950 MPa> and YS was in range <400; 500>. Evaluation of porosity was realized on non-etched samples using by quantitative image analysis in order to describe the dimensional and morphological porosity characteristics. The pores in the Ti6Al4V alloy showed homogeneous distribution without significant large pores.
Micromechanical Analysis of Dislocation and Precipitate Interactions in Aluminum Alloys
Authors: Muraishi Shinji , Liu Jianbin
Published: April 2020

Misfit precipitates greatly contribute to precipitation hardening in wrought aluminum alloys, where attractive and repulsive interactions are expected by stress-strain field of fine misfit precipitates. There are two types of dislocation cutting manner of {001} GP-zone and θ’ phase in Al-Cu alloys; one is dislocation burgers vector intersects (001) variant by 0 deg. (Type A), the other is dislocation Burgers vector intersects (001) variant by 60 deg. (Type B). In order to simulate the interaction of dislocation and fine misfit precipitates, internal stress fields by dislocation and precipitate are computed by Micromechanics based Green’s function method. The elastic field inside and outside a precipitate is deduced from Eshelby’s inclusion theory, where misfit strain of a (001) precipitate is assumed by unidirectional eigenstrain across the disk shaped inclusion. Dislocation motion under three different kinds of dislocation Burgers vector is tested by computing interaction force acted on the discretized dislocation line elements. The interaction force caused by (001) misfit precipitate is varied with types of dislocation cutting manner, magnitude of the interaction force associated with dislocation glide is increased by Type B variant (60 deg.), whereas that is minutely zero for Type A variant (parallel).
First-Principles Study of the Adsorption of Carboxylic Acid on Cu(111)
Authors: Nunomura Norio , Yamashita Jun , Hatakeyama Masahiko , Sunada Satoshi
Published: April 2020

The geometric structure and electronic properties of the adsorption of organic carboxylic acids on the closed-packed Cu(111) surface have been addressed by periodic density functional theory (DFT) calculations. We also have taken into account van der Waals (vdW) interaction by the VdW-DF method. The optimized structures show that formic and acetic acids have stable structures of molecular adsorption in clean copper surfaces. We find that the adsorption energies at 1/16 ML coverage are -0.27, -0.30 and -0.10 eV for formic, acetic, and propionic acid, respectively. On the other hand, in the case of vdW-DF, their adsorption energies increased to -0.63, -0.70 and -0.73 eV.
Nanotube Formation on Ti-15Zr-4Nb-4Ta by Anodic Oxidation
Authors: Okano Satoshi , Mori Masayuki , Kobayashi Sengo , Okamoto Takeaki
Published: April 2020

Surface morphology and composition of anodized Ti-15Zr-4Nb-4Ta alloys with nanotube were examined by using X-ray diffractometry and analytical scanning electron microscopy. The Ti alloy consisted of α and β phases. Anodizing to form nanotube on the Ti alloy was carried out using electrolyte of 0.2 wt.% NH4F and 2 Vol.% H2O in ethylene glycol under different potential at from 30 to 60V. SEM observation showed that nanotubes were vertically aligned on surface of the Ti alloy. Inner diameter of these nanotubes varied from 45 to 127 nm with increasing applied potential to the specimen from 30 to 60 V. Surface of the Ti alloy with nanotube was ragged due to the difference in dissolution rate of the internal structure of α and β phases.
Complexes between C-Reactive Protein and Very Low Density Lipoprotein Delay Bacterial Clearance in Sepsis
Authors: Cheng Zhenxing , Abrams Simon T. , Toh Julien , Wang Susan S. , Downey Colin , Ge Xiaoling , Yu Qian , Yu Weiping , Wang Guozheng , Toh Cheng-Hock
Published: April 2020

C-reactive protein (CRP) can increase up to 1000-fold in blood and form complexes with very low density lipoproteins (VLDL). These complexes are associated with worse outcomes for septic patients, and this suggests a potential pathological role in sepsis. Complex formation is heightened when CRP is over 200 mg/l and levels are associated with the severity of sepsis and blood bacterial culture positivity. Using a mouse bacteremia model, blood bacterial clearance can be delayed by i.v. injection of CRP–VLDL complexes. Complexes are more efficiently taken up by activated U937 cells in vitro and Kupffer cells in vivo than VLDL alone. Both in vitro–generated and naturally occurring CRP–VLDL complexes reduce phagocytosis of bacteria by activated U937 cells. Fcγ and scavenger receptors are involved and a competitive mechanism for clearance of CRP–VLDL complexes and bacteria is demonstrated. Interaction of phosphocholine groups on VLDL with CRP is the major driver for complex formation and phosphocholine can disrupt the complexes to reverse their inhibitory effects on phagocytosis and bacterial clearance. Increased formation of CRP–VLDL complexes is therefore harmful and could be a novel target for therapy in sepsis.
Anxiety and depression in adolescents with asthma and in their parents. Is an increased basal cholinergic tone a possible further reason to explain the negative impact on asthma control?
Authors: Liccardi Gennaro , Calzetta Luigino , Milanese Manlio , Bilò Maria Beatrice , Liccardi Maria Vittoria , Matera Maria Gabriella , Rogliani Paola
Published: April 2020

To the Editor

We read with interest the excellent article of Licari et al.  reporting that anxiety and depression are common in adolescents suffering from asthma as well as in their parents, mainly in mothers. The consequence of this relationship is that emotional disorders might negatively affect also the control of asthma.
Identidad docente y exigencia académica: encuentros y desencuentros con la realidad social
Authors: Villarruel Fuentes Manuel
Published: April 2020

Los profundos cambios que experimenta la sociedad, caracterizados por la búsqueda de nuevos paradigmas que tutelen la educación superior a nivel internacional, dejan entrever la posibilidad de que la identidad docente se encuentre en severa crisis. Frente a escenarios poco veraces, de manera recurrente se observa un disenso entre la identidad profesional disciplinaria del maestro y su papel como educador, condición que se ve exacerbada por la exigencia que se le impone institucionalmente para hacer investigación, como si comulgar estos dos ejercicios profesionales pudiera solventarse únicamente con su formación disciplinar. Ante ello, es necesario efectuar un acercamiento a las posibles causas que determinan esta condición, a finde delimitar el grado de responsabilidad que a cada protagonista, y en especial al maestro, le atañe.
El Profesor de Educación Diferencial en Chile para el Siglo XXI: Tránsito de Paradigma en la Formación Profesional
Authors: Manghi H. Dominique , Julio M. Cristina , Conejeros S. María Leonor , Donoso O. Elizabeth , Murillo Q. María Luz , Diaz M. Carmen
Published: April 2020

La Educación Especial vive un proceso de cambio de paradigma reflejado en políticas públicas nacionales e internacionales. El nuevo paradigma de la Educación Inclusiva desafía a la formación de profesores a redefinir las funciones que tradicionalmente ha ejercido un profesor de Educación Especial o Diferencial sin perder de vista su identidad profesional. Este artículo presenta resultados de una consulta realizada por una Institución Universitaria respecto de la proyección del rol de este profesional frente a las demandas del siglo XXI. La consulta fue dirigida a profesionales, sus empleadores y profesores formadores y se realizó en el contexto de la actualización del perfil de egreso y plan de estudio de una carrera universitaria de larga trayectoria en dicha institución. Tras un análisis cualitativo los hallazgos evidencian cambios en las prácticas pedagógicas, las que exigen una nueva mirada en la formación de estos profesores, lo que implica transitar hacia el nuevo paradigma que permitiría asumir la diversidad presente en la escuela.
La hospitalización: un paréntesis en la vida del niño. Atención educativa en población infantil hospitalizada
Authors: Hernández Pérez Encarnación , Rabadán Rubio José Antonio
Published: April 2020

La abrupta aparición de una enfermedad genera en la población infantil una ruptura del equilibrio del que hasta el momento había gozado. Tales son las reminiscencias que la pérdida de salud acarrea en el niño que, no únicamente nos hallamos ante un problema de salud, sino así mismo, ante consecuencias personales y sociales que esta población sufre al enfermar. Tanto es así que, desde los actuales textos legislativos con competencia en educación se alude a las necesidades específicas de apoyo educativo que acompañan a la enfermedad y se prevén modalidades de escolarización diferentes a las ordinarias (aulas hospitalarias). Una atención adecuada al niño enfermo, pasa por la asociación de la Pedagogía Hospitalaria y la Pedagogía Terapéutica, aunándose necesidades educativas especiales y asistenciales, a fin de ofrecer una respuesta personalizada e interdisciplinar. El trabajo que nos ocupa supone una revisión de la situación actual en las aulas hospitalarias españolas y la propuesta de pautas de intervención para una actuación global con el niño hospitalizado.
Retos en la gobernanza de las universidades españolas
Authors: Gairin Joaquín , Castro Diego
Published: April 2020

El artículo profundiza sobre los retos a los que se enfrenta el sistema de gobernanza universitaria en España centrándose en tres aspectos básicos: la Autonomía institucional, la Participación en el gobierno y la Rendición de cuentas. El análisis considera aspectos documentales y un estudio de campo con veintitrés entrevistas.La autonomía se relaciona con la capacidad para tomar y desarrollar las propias decisiones, planteando los problemas ligados a su extensión, desarrollo y control, sin obviar las contradicciones existentes entre la autonomía institucional y la autonomía personal. La participación enlaza con la tradición y se refuerza con el desarrollo democrático de las sociedades, si bien plantea los dilemas de representatividad-rapidez y de número de participantes-responsables en la toma de decisiones. Por último, los retos de la rendición de cuentas tienen que ver con el establecimiento de indicadores y los efectos de la misma.
Dos propuestas para la inclusión de los jóvenes en el sistema educativo
Authors: Calvo Gloria , Camargo Marina
Published: April 2020

Artículo de investigación elaborado a partir de la evaluación de dos modelos de bachillerato flexible, a saber: Grupos juveniles Creativos (GJC) y Bachillerato Pacicultor (BP). El interés de esta evaluación es mostrar cómo la flexibilidad pedagógica, expresada en horarios, materiales, metodologías y apoyos, es una estrategia para que los jóvenes de sectores vulnerables puedan acceder a la educación formal. No obstante, aceptar estos modelos flexibles exige que el sistema educativo piense sus políticas de evaluación y reconozca que estas nuevas alternativas responden a unos retos, pero exigen otras decisiones, si se quiere garantizar la educación como posibilidad de desarrollo a quienes no están en el sistema educativo
REFLEXIÓN DOCENTE Y DISEÑO DE SECUENCIAS DIDÁCTICAS EN UN CONTEXTO DE FORMACIÓN DE FUTUROS PROFESORES DE CIENCIAS NATURALES
Authors: Astudillo Tomatis Carola , Rivarosa Somavilla Alcira , Ortiz Félix
Published: April 2020

Se analiza la dinámica de reflexión desplegada por un grupo de futuros profesores de Ciencias Naturales durante la elaboración de secuencias didácticas. Concretamente se interpretan las expresiones contenidas en diarios de trabajo propuestos en un contexto de formación inicial como escenarios para la reflexión explícita sobre el proceso de diseño didáctico. Se consideran para ello tres dimensiones de complejidad creciente: técnica, práctica y crítica. De este modo, se caracteriza una dinámica fluctuante y compleja de reflexión a través de perfiles cualitativos de progresión metacognitiva. Éstos, a su vez, develan condiciones de posibilidad para la movilización de los saberes docentes en contextos de formación.
Prácticas educativas familiares: ¿Cómo las perciben los padres? ¿Cómo las perciben los hijos? ¿Qué grado de acuerdo hay?
Authors: Valdivieso León Lorena , Román Sánchez José María , Flores Lucas Valle , Van Aken Marcel A. G.
Published: April 2020

En el marco de los estilos educativos familiares (autoritario, equilibrado y permisivo), se presentan los resultados de un estudio cuyo objetivo era determinar el grado de acuerdo en la percepción de las prácticas educativas familiares entre padres e hijos. Participaron 200 unidades familiares convencionales: 200 niños (tres y seis años) y 336 padres. Los tres conjuntos integrados de prácticas educativas familiares fueron evaluados con las PEF: Escalas de identificación de Prácticas Educativas Familiares en niños pequeños de Alonso y Román (2003a) y una entrevista clínica piagetiana. Se realizó una comparación entre las percepciones acerca de las PEF de los padres vs las madres, según sus hijos, donde no se observaron diferencias significativas. El Análisis Factorial Confirmatorio corroboró el modelo de un único factor. Se concluye que el estilo educativo familiar más, frecuentemente, utilizado es el equilibrado, y no existe acuerdo en la percepción de las PEF entre padres e hijos.
La educación musical en la formación básica en España. El problema de la dispersión curricular
Authors: Belletich Olga , R. Wilhelmi Miguel , Angel-Alvarado Rolando
Published: April 2020

En España la Educación Artística pierde su carácter obligatorio en Educación Primaria con la entrada en vigencia de la Ley Orgánica para la Mejora de la Calidad Educativa [LOMCE], relegando la decisión curricular a las Comunidades Autónomas. Este estudio pretende establecer la concreción de las estipulaciones de la LOMCE, relativas a la Educación Musical, en las distintas comunidades y explicar el problema de la dispersión del currículo entre los enfoques eficientista y humanista de la educación. Como estudio cualitativo de diseño socio-crítico, se enmarca en el modelo de análisis de la ingeniería didáctica. Los resultados demuestran que las comunidades hacen esfuerzos por impartir la asignatura más allá de lo normado por la LOMCE y, que existe una intención educativa de facto para incorporar la asignatura en forma transversal y obligatoria en la Educación Primaria, a partir de una articulación basada en las competencias clave internacionales.
La Titulación de Pedagogía en Proceso de cambio ¿Qué perciben los estudiantes?
Authors: García Hernández María Luisa , Porto Currás Mónica , Martínez Valcárcel Nicolás
Published: April 2020

La Universidad está inmersa en un proceso de cambio sustancial -tras su incorporación al Espacio Europeo de Educación Superior- viéndose obligada a modificar aspectos tan sustanciales de su anatomía como: el modelo educativo, los objetivos, el nivel organizativo, estructural y evaluativo. Evidentemente, estos cambios deben verse reflejados en las nuevas titulaciones de Grado. En este artículo profundizaremos en la transformación que ha sufrido el título de Pedagogía -desde la Licenciatura al Grado-. Concentraremos nuestra atención en la percepción del alumno en relación a la aplicación de capacidades cognitivas y cómo estas influyen significativamente -o no- en haber alcanzado un aprendizaje profundo o superficial. Para ello, empleamos una metodología no experimental, recogiendo información de 205 estudiantes mediante un cuestionario. Entre los resultados destacamos que en ambos planes de estudios existe continuidad en cuanto al desarrollo de determinadas capacidades, lo que favorece un determinado enfoque de aprendizaje.
The Remix of Culturally relevant pedagogy: pertinence, possibilities, and adaptations for the chilean context.
Authors: Peña Sandoval César
Published: April 2020

In this paper, I explore prior and recent conceptualizations of the culturally responsive approach to teaching, an asocial justice perspective that presents possibilities for the Chilean context. Based on the recent literature, I propose Culturally Relevant Pedagogy 2.0 as a comprehensive framework that can be adapted to diverse local contexts beyond where it was originally developed. After describing the five principles that I consider more pertinent for Chile, I suggest adaptations such as the incorporation of grassroots youth culture and indigenous knowledge. In that vein, this work forms part in a major effort to build a theoretical basis that transcends boundaries but also adds a local perspective on teaching diverse students. My conclusions are intended to inform, inspire and stimulate pre-service and in-service teachers, and teacher educators in favor of quality education for diversity and equity.
La ética organizacional en los centros educativos. Análisis de concepciones y prácticas educativas.
Authors: Colorado Ramírez Sara , Gairín Sallán Joaquin
Published: April 2020

La presente aportación analiza las concepciones de los agentes de la comunidad educativa y sus prácticas entorno a la ética organizacional en los centros educativos. Incluye resultados de siete entrevistas en profundidad a diferentes agentes de la comunidad educativa de la provincia de Barcelona para explorar qué opinan, cómo caracterizan y desarrollan la ética organizacional; el análisis de documentos para conocer qué se sabe sobre el objeto de estudio y la revisión de seis buenas prácticas de ámbito educativo y empresarial, de la salud y de los servicios sociales con la finalidad de identificar herramientas de promoción de la ética organizacional en diferentes instituciones. Los resultados delimitan un concepto teórico sobre la ética organizacional, analizan la opinión de agentes de la comunidad educativa y teóricos expertos y aportan información sobre distintas experiencias, prácticas, estrategias organizativas que los centros educativos desarrollan para promover la ética organizacional