bluuebunny/crossref_metadata_2025 huggingface dataset:
Mechanical–electrical–pneumatic systematic design exploration of hexapod robot experimental prototype
Authors: Bai Long , Huang Xiaolong , Liu Xiangquan , Gao Hong , Huang Min
Published: October 2019

Aiming at the problem of the detect and rescue in the coal mine with the leaking vas, a type of pneumatic hexapod explored robot which uses a high pressure nitrogen cylinder as the power producer is designed. The leg mechanism is designed with three degrees of freedom, the straight line walking and turning gaits are planned, which are testified by the virtual prototype. The control loop of the cylinder is designed with the magnetic valve with three positions and five paths. The air bottle, the reducing valve, the general follow control part (GFC) the magnetic valve with three positions and five paths, the cylinder are selected and the air supply loop of the hole machine is designed, the 3D model of the hole machine is built which is used to confirm the installing form of the hole body. The experimental prototype is obtained at last. The power supply and control circuits of the magnetic valves are designed, the control series is written on the Arduino single chip. The experiment of the leg swing of the robot on the stage is proceeded which verifies the correctness of the design.
Ground clutter simulation for airborne forward‐looking multi‐channel LFMCW radar
Authors: Li Hai , Duan Jialing , Song Di
Published: October 2019

Ground clutter is a crucial factor that affects the detection performance of the airborne forward‐looking multi‐channel linear frequency modulated continuous wave (LFMCW) radar, so the distribution characteristics of studying the ground clutter plays an important role in suppressing ground clutter and improving radar detection performance. In this article, the authors first use the Ward model to divide the effective clutter area into multiple independent clutter patches and calculate the echo signal of each clutter patch. Then the beat signal of each clutter patch is obtained by the de‐chirp processing. Next, a Fourier transform is performed on the beat signal of each clutter patch to determine the range ring where the echo of the clutter patch is located, and the peak spectrum signal of the beat signal of the clutter patch in the same range ring is superimposed, thus the authors can realise the simulation of the ground clutter signal. Finally, the simulation results indicate the effectiveness of the proposed method.
Characteristics of electrical field flow fractionation with chronoamperometry and electrochemical impedance
Authors: Shao Ligeng , Petersen Kevin , Shiri Farhad , Feng Haidong , Gale Bruce
Published: October 2019

Electrical field flow fractionation (EFFF) is a particle separation method that employs an electrical field to cause particles in the carrier flow transferring in the vertical direction. The electrical characteristics of EFFF are one of the important aspects to explore electrical field how to work on the particle separation in EFFF channel. The equivalent electrical circuit model of EFFF channel was built. The experiments of chronoamperometry and electrochemical impedance spectroscopy (EIS) were conducted on the EFFF channel. The electrical circuit was utilised to fit the data of EIS experiments on EFFF channel. The fitting data were compared with the experimental data of EIS. The result indicates that the experimental data is highly quantified with the fitting data. It manifested that the equivalent electrical circuit reflected the electrical characteristics of the EFFF channel.
Health monitoring of composite materials based on BP sensors under complex environments
Authors: Wang Xiaoqiang , Tang Hailong , Lu Shaowei , Ma Junchi , Ma Keming , Wang Shuai , Yang Xiangdong
Published: October 2019

In this study, the air thermal cycle test and the relative humidity (RH) cycle test were carried out to buckypaper (BP) co‐cured with glass fibre prepreg together in order to verify the practicality and stability of the sensor in complex environment. The BP bonded with composite laminate were subjected to tension and tension–tension fatigue up to 1000 cycles when the sensor is subjected to temperature changed from 20 to 120°C and different RH from 0 to 85%, respectively, and the electrical–mechanical response shows that the resistance of sensor increases as the humidity increases, and ultimately the change rate tends to be stable. Tensile experiments shows that gauge factor (GF) changes by 327 and 306%, respectively. The authors finished the fatigue experiment to specimen of the longest environmental treatment in order to further verify the practicality of the sensors, in the fatigue test, the resistance change rate varies with the number of cycles, and it tends to be stable after a period of time. The authors draw the curve of GF and fatigue cycle number so that the stability of the sensors are better reflected, the result is consistent with the fatigue result. Therefore, BP sensors can be applied to the health monitoring of aerospace composites.
Biosynthesis of MgO nanoparticles using Annona squamosa seeds and its catalytic activity and antibacterial screening
Authors: Sharma Sunil K. , Khan Azhar U. , Khan Masudulla , Gupta Mona , Gehlot Abhishek , Park Soonheum , Alam Mahboob
Published: October 2019

Biologically and catalytically important magnesium oxide nanoparticles (MgONPs) have been synthesised successfully in an eco‐friendly mode using Annona squamosa seeds. The synthesised nanoparticles were characterised by spectroscopic analysis methods. UV–vis, XRD powder diffraction and EDX were used to confirm the nanoparticles’ stability, phase identification and element content, respectively. SEM and TEM were also used to predict the size and morphology of the nanoparticles. The biogenic synthesis of MgONP has been judged for its antibacterial activity against Pactobacterium carotovorum and for its catalytic activity in the synthesis of 2‐benzimidazole and has been shown to be potentially effective against pathogenic strain and in terms of catalytic activity in the formation of benzimidazole.
Study on influential parameters of hybrid AFM processes: a review
Authors: Kumari Chinu , Chak Sanjay Kumar
Published: October 2019

The abrasive flow machining (AFM) processes are ultra-precise finishing techniques widely used as finishing solutions for micro/nano finishing of inaccessible contours on difficult to machine components. The AFM processes use highly visco-elastic properties of the abrasive laden medium as a cutting tool for deburring, edge rounding and polishing the surface. Due to the design of workpiece holder and hybridization of basic AFM, the complex shear modulus of the abrasive laden medium can locally be influenced and thus a targeted removal of material from workpiece can be achieved, as a result, there was improved performance, productivity, surface integrity, and texture. This article addresses the detailed classification of AFM processes based on the use of different energy and tooling and highlights the critical outcomes in each category. The objective of this article is to review and summarize various process parameters of AFM processes like extrusion pressure, medium flow volume, medium flow rate, number of cycle, viscosity, workpiece geometry, etc. and their effects on roughness value and material removal rate. Key capabilities and noted findings concerning various AFM processes in addition to their applications and future challenges are also discussed in this paper.
Distribution of intramuscular giant lipomas in the functional compartments of the forearm: a report of 12 cases
Authors: Capkin Sercan , Cavit Ali , Yilmaz Kutay , Kaleli Tufan
Published: October 2019

Purpose The aim of this study was to investigate the distribution of intramuscular giant lipomas in the functional compartments of the forearm and to compare their clinical, radiological and histopathological features with those reported in the current literature.

Methods The study included 12 patients who were surgically treated for intramuscular lipomas > 5 cm in size located in the forearm that had been confirmed histopathologically between April 2006 and March 2017. Data about the patients with respect to age, sex, affected side, localisation of the lipomas in the forearm functional compartments, size, histopathological features and recurrence were collected. According to the clinical complaints, direct radiography and magnetic resonance imaging were applied.

Results The average diameter was 6.5 cm (range: 5.5–9 cm). All lipomas had a well-defined border. All the patients presented with soft-tissue masses that were painless in seven patients. Five patients had nerve compression symptoms. When the lipomas were classified according to the functional compartments of the forearm, six of them were located in the superficial volar compartment, two in the deep volar compartment, two in the deep dorsal compartment and two in the lateral compartment. All lipomas were surgically removed by marginal excision. None had complications or recurrence at a mean of 6.5 years follow-up (range: 1–12 years) after surgery.

Conclusions Intramuscular lipoma is a relatively uncommon tumour, especially in the forearm. Because of the proximity to the neurovascular structures in the forearm, excision of lipomas should be performed with care and include wide incisions. Additionally, knowing the anatomical features of the compartment where the lipoma is localised in the forearm is important in planning surgery to enable easier dissection of the lipoma and lessen the risk of damage to adjacent neurovascular structures.

Level of evidence Level 4
Die Lymphadenektomie im Rahmen der kurativ intendierten Lungenmetastasenchirurgie – Konsensusempfehlungen einer Expertengruppe basierend auf dem Delphi-Verfahren
Authors: Bölükbas Servet , Pfannschmidt Joachim , Krüger Marcus , Schneider Paul , Leschber Gunda
Published: October 2019

Hintergrund Ziel der vorliegenden Konsensusfindung war es, eine Verbesserung der Versorgungsqualität zur Optimierung und Vereinheitlichung der Lymphadenektomie bei der Lungenmetastasenchirurgie mit allgemein akzeptierten Definitionen und Standards zu erreichen.

Material und Methoden Der Expertenkonsens wurde mittels eines 2-stufigen Delphi-Prozesses mit anschließender Expertenkonferenz etabliert. Ein Konsens wurde festgestellt, wenn 75% der Experten zustimmten.

Ergebnisse Von den kontaktierten 76 Experten (Fachärzte für Thoraxchirurgie mit Leitungserfahrung) beteiligten sich an der 1. Fragerunde 49 und an der 2. Fragerunde 47 Experten. An der Konferenz nahmen 43 Experten teil. Der bevorzugte Zugangsweg bei solitärer subpleuraler Lungenmetastasierung ist die Videothorakoskopie (VATS), bei multiplen Lungenmetastasen hingegen die anterolaterale Thorakotomie. Eine Lymphadenektomie wird unabhängig vom Zugangsweg durchgeführt. Die systematische Lymphadenektomie bzw. systematisches Lymphknotensampling ist fester Bestandteil der Lungenmetastasektomie bei kolorektalen Karzinomen, Nierenzellkarzinomen und nicht seminomatösen Keimzelltumoren. Die Größe der Lungenmetastase hat keinen Einfluss auf die Lymphadenektomie per se. Der Eingriff wird bei intraoperativem Nachweis einer Lymphknotenmetastasierung komplettiert und nicht abgebrochen.

Schlussfolgerung Mit den im Expertenkonsens erarbeiteten Kriterien liegen erstmals Empfehlungen für die thorakale Lymphadenektomie bei der pulmonalen Metastasenchirurgie vor.
Clinical Applicability of Lung Ultrasound Methods in the Emergency Department to Detect Pulmonary Congestion on Computed Tomography
Authors: Miger Kristina Cecilia , Fabricius-Bjerre Andreas , Maschmann Christian Peter , Wamberg Jesper , Winkler Wille Mathilde Marie , Abild-Nielsen Annemette Geilager , Pedersen Lars , Lawaetz Schultz Hans Henrik , Damm Nybing Janus , Nielsen Olav Wendelboe
Published: October 2019

Background B-lines on lung ultrasound are seen in decompensated heart failure, but their diagnostic value in consecutive patients in the acute setting is not clear. Chest CT is the superior method to evaluate interstitial lung disease, but no studies have compared lung ultrasound directly to congestion on chest CT.

Purpose To examine whether congestion on lung ultrasound equals congestion on a low-dose chest CT as the gold standard.

Materials and Methods In a single-center, prospective observational study we included consecutive patients ≥ 50 years of age in the emergency department. Patients were concurrently examined by lung ultrasound and chest CT. Congestion on lung ultrasound was examined in three ways: I) the total number of B-lines, II) ≥ 3 B-lines bilaterally, III) ≥ 3 B-lines bilaterally and/or bilateral pleural effusion. Congestion on CT was assessed by two specialists blinded to all other data.

Results We included 117 patients, 27 % of whom had a history of heart failure and 52 % chronic obstructive pulmonary disease. Lung ultrasound and CT were performed within a median time of 79.0 minutes. Congestion on CT was detected in 32 patients (27 %). Method I had an optimal cut-point of 7 B-lines with a sensitivity of 72 % and a specificity of 81 % for congestion. Method II had 44 % sensitivity, and 94 % specificity. Method III had a sensitivity of 88 % and a specificity of 85 %.

Conclusion Pulmonary congestion in consecutive dyspneic patients ≥ 50 years of age is better diagnosed if lung ultrasound evaluates both B-lines and pleural effusion instead of B-lines alone.
Myocardial Perfusion SPECT 2018 in Germany: Results of the 8th Survey
Authors: Lindner Oliver , Burchert Wolfgang , Buechel Ronny , Schäfer Wolfgang Michael ,   Im Namen der Arbeitsgemeinschaft „Kardiovaskuläre Nuklearmedizin“ der Deutschen Gesellschaft für Nuklearmedizin und der AG20 „Nuklearkardiologische Diagnostik“ der Deutschen Gesellschaft für Kardiologie
Published: October 2019

Aim This paper presents the results of the 8th survey of myocardial perfusion SPECT (MPS) from the reporting year 2018.

Methods 291 questionnaires (184 practices (PR), 77 hospitals (HO), 30 university hospitals (UH)) were evaluated. Results of the last survey from 2015 are set in squared brackets.

Results MPS of 145 930 [121 939] patients were reported (+ 19.6 %). 76 % [78 %] of all patients were studied in PR, 16 % [14 %] in HO, and 8 % [8 %] in UH, mostly with a 2-day-protocol 48 % [50 %]. 99.96 % [98 %] of all MPS were performed with Tc-99 m radiopharmaceuticals and in 0.04 % with Tl-201.

A pharmacological stress test was applied in 49 % [43 %] (23 % [22 %] adenosine, 26 % [20 %] regadenoson, dipyridamole or dobutamine together < 1 % [1 %]). Attenuation correction was performed in 26 % [25 %] of all MPS, gated SPECT in 86 % [80 %] of stress MPS, in 87 % [78 %] of rest and in 83 % [76 %] of all stress and rest MPS. 67 % [53 %] of the departments performed MPS scoring by default, whereas 16 % [24 %] did not apply this feature at all.

69 % [60 %] reported an increase or no changes in their MPS patient numbers. One hundred twenty-six departments which participated in the surveys from 2009 to 2018 reported an increase in MPS by 44 %. 69 % [70 %] of the MPS were requested by ambulatory care cardiologists.

Conclusion The 2018 MPS survey reveals a high-grade adherence of routine MPS practice to current guidelines. The positive development in MPS performance and MPS numbers observed since 2012 remains ongoing.
Causes and Secondary Prevention of Acute Ischemic Stroke in Adults
Authors: Jensen Märit , Thomalla Götz
Published: October 2019

Stroke still remains a major cause of death and disability worldwide. Ischemic stroke is the most common type of stroke. Causes of ischemic stroke can be classified into large-artery atherosclerosis, cardiogenic embolism, small-vessel disease, stroke of other determined etiology, and stroke of undetermined etiology. Stroke causes in adults are mainly attributable to classical cardiovascular risk factors such as hypertension, diabetes, hypercholesterolemia, and smoking. In neuroimaging, stroke subtypes can be defined according to lesion localization and distribution (territorial infarct, lacunar infarct, hemodynamic infarct), which provide information as to the underlying etiology. Acute stroke management comprises rapid neurological assessment and rapid imaging to initiate effective reperfusion treatment with intravenous thrombolysis and mechanical thrombectomy. Stroke survivors are at increased risk of recurrent stroke. Therefore, diagnosis of the underlying cause and optimal secondary prevention is of importance. Pharmacologic secondary prevention includes antithrombotic therapy with antiplatelet drugs, oral anticoagulation, and treatment of vascular risk factors. Nonpharmacologic measures of secondary prevention comprise surgical or interventional revascularization of symptomatic carotid stenosis and interventional closure of patent foramen ovale.
The Comparison between Isokinetic Knee Muscles Strength in the Ipsilateral and Contralateral Limbs and Correlating with Function of Patients with Stroke
Authors: Khan Fayaz , Anjamparuthikal Haris , Chevidikunnan Mohamed Faisal
Published: October 2019

Objective The aim of this study is to compare the isokinetic knee muscles peak torque measurements and proprioception between the affected and intact limbs of patients with stroke, in addition to finding the correlation between knee muscles strength and lower limb function.

Methods Twelve patients with stroke (mean age 64.33 ± 6.140 years), with 3 to 7 months poststroke who can walk 25 feet independently without using or using assistive devices and full passive range of motion were included in the study. Biodex isokinetic dynamometer was used for measuring isokinetic strength at 90°/s, 120°/s, and 150°/s and isometric strength at 60°/s in both flexors and extensors of the knee, whereas proprioception was measured at 45°/s knee flexion, all for affected and intact limbs. Functional measurements were assessed using the Fugl-Meyer Assessment for Lower Limb scale and Barthel Index (BI).

Results The differences shown were found to be statistically significant between affected and intact limbs in isokinetic 90°/s flexion (p = 0.005), extension (p = 0.0013), and isometric at 60°/s flexion (p < 0.0001) knee muscle strengths and also the proprioception (p = 0.05). Significant positive correlation was found between isokinetic affected side knee flexion at 90°/s (r = 0.903) with BI (r = 0.704).

Conclusion There is a significant difference in peak torque measurements between affected and normal lower limbs of poststroke patients, as well as a significant correlation between the knee strength and lower limb functions. Furthermore, it can also be concluded that the differences in knee proprioception between the affected and intact limbs were shown to be significant.
Broadband and wide-angle invisibility with PT-symmetric 2D-Weyl semimetal
Authors: Sarısaman Mustafa , Tas Murat
Published: October 2019

Inspired by the magnificent features of two-dimensional (2D) materials that aroused much of the interest in recent materials science research, we study PT-symmetric 2D-Weyl semimetal (WSM) to reveal the broadband and wide-angle invisible configurations in a PT-symmetric optical slab system. Desired unidirectional reflectionlessness and invisibility phenomena are obtained by the optimal control of system parameters. We unravel the mystery of broadband and wide-angle invisibility in regular slab materials with finite refractive indices by means of the plenary expressions. We show that materials whose refractive indices are relatively small (usually around η=1) give rise to quite a lot of broadband and wide-angle (almost all incidence angles) invisible configurations. This is not observed with any 2D material other than 2D WSMs. Our findings suggest concrete expedience to experimental realizations in this direction.
Zermelo’s problem: Optimal point-to-point navigation in 2D turbulent flows using reinforcement learning
Authors: Biferale L. , Bonaccorso F. , Buzzicotti M. , Clark Di Leoni P. , Gustavsson K.
Published: October 2019

To find the path that minimizes the time to navigate between two given points in a fluid flow is known as Zermelo’s problem. Here, we investigate it by using a Reinforcement Learning (RL) approach for the case of a vessel that has a slip velocity with fixed intensity, Vs, but variable direction and navigating in a 2D turbulent sea. We show that an Actor-Critic RL algorithm is able to find quasioptimal solutions for both time-independent and chaotically evolving flow configurations. For the frozen case, we also compared the results with strategies obtained analytically from continuous Optimal Navigation (ON) protocols. We show that for our application, ON solutions are unstable for the typical duration of the navigation process and are, therefore, not useful in practice. On the other hand, RL solutions are much more robust with respect to small changes in the initial conditions and to external noise, even when Vs is much smaller than the maximum flow velocity. Furthermore, we show how the RL approach is able to take advantage of the flow properties in order to reach the target, especially when the steering speed is small.
Mechanisms of broadband noise generation on metal foam edges
Authors: Rubio Carpio Alejandro , Avallone Francesco , Ragni Daniele , Snellen Mirjam , van der Zwaag Sybrand
Published: October 2019

The turbulent flow over a porous trailing edge of a NACA 0018 airfoil is experimentally investigated to study the link between the hydrodynamic flow field and the acoustic scattering. Four porous trailing edges, obtained from open-cell metal foams, are tested to analyze the effects on far-field noise of the permeability of the material and of the hydrodynamic communication between the two sides of the airfoil. The latter is assessed by filling the symmetry plane of two of the porous trailing edges with a thin layer of adhesive that acts as a solid membrane. Experiments are performed at a zero degree angle of attack. Far-field noise measurements show that the most permeable metal foam reduces noise (up to 10 dB) with respect to the solid trailing edge for Strouhal numbers based on the chord below 16. At higher nondimensional frequencies, a noise increase is measured. The porous inserts with an adhesive layer show no noise abatement in the low frequency range, but only a noise increase at higher frequency. The latter is, therefore, attributed to surface-roughness noise. Flow field measurements, carried out with time-resolved planar particle image velocimetry, reveal correlation of near-wall velocity fluctuations between the two sides of the permeable trailing edges only within the frequency range where noise abatement is reported. This flow communication suggests that permeable treatments abate noise by distributing the impedance jump across the foam in the streamwise direction, promoting noise scattering from different chordwise locations along the inserts. This is further confirmed by noise source maps obtained from acoustic beamforming. For the frequency range where noise reduction is measured, the streamwise position of the main noise emission depends on the permeability of the insert. At higher frequencies, noise is scattered from upstream the trailing edge independently of the test case, in agreement with the roughness-generated noise assumption.
Enabling optimization under uncertainty in aerospace design
Authors: Lim Alane
Published: October 2019

Researchers address a longstanding problem in optimizing aerospace designs under errors and uncertainty.
Survival and movements of koalas translocated from an over-abundant population
Authors: Menkhorst Peter , Ramsey David , O'Brien Tim , Hynes Emily , Whisson Desley
Published: October 2019

Abstract Context At some sites in southern Victoria, browsing pressure caused by high-density koala populations can result in defoliation of preferred browse trees. In extreme cases, this over-browsing can lead to widespread tree death and starvation of koalas. To reduce the potential for mortality of trees and koalas, a management strategy that includes fertility control of females and translocation of healthy individuals (male and female) has been adopted. AimsTo compare the short- to medium-term survival and body condition of koalas translocated from over-browsed habitat and released into unoccupied (or nearly so) habitat with that of koalas left in situ in compromised habitat. Methods We monitored survival and body condition of 36 translocated koalas for 4–5 months after translocation relative to that of a control group (24 animals) left in situ. Koalas were recaptured and body condition measured (as a scaled body-mass index) ~40 and 137 days after translocation. Additionally, GPS loggers were used to investigate patterns of koala movement. Key resultsSurvival rates of translocated koalas were not different from those of controls and females in both groups showed slightly higher survival rates than did males. After 137 days, control animals had lower scaled body mass, whereas translocated animals, after an initial reduction, had mostly regained, or increased their scaled body mass. Translocated females regained their original scaled body mass faster than did translocated males. Male koalas in both control and translocated groups had higher rates of movement than did females, and translocated koalas had slightly higher rates of movement than did control koalas. Translocated koalas moved farther from their release location than control koalas. ConclusionsOn the basis of the scaled body-mass index, translocated koalas fared better than those left in situ in compromised habitat, even though the density of koalas in the over-browsed habitat had been reduced by a wider salvage translocation program. The process used to identify potential release sites, including a spatial koala-habitat index, accurately predicted suitable koala habitat. ImplicationsThe current management strategy of translocating koalas out of over-browsed habitat is supported and could be more widely applied.
“I am an adult now”
Authors: Prior Matthew T.
Published: October 2019

This narrative-based study employs membership categorization analysis to address the following question: How does a victim of abuse formulate and manage various categories and related descriptive details to story past trauma in ways that bring about new endings or insights in the present? Drawing on data taken from a larger research project on immigrant identity, the analysis centers on a Cambodian-Vietnamese man’s narrative of childhood abuse and adulthood confrontation. It shows how the teller, by recalibratingperson(e.g., ‘father-son’, ‘victim-abuser’),age(e.g., ‘young-old’),place(e.g., ‘North America-Vietnam’), and other categorial resources, re-stories people and events and their psycho-social and moral inferences and outcomes. By tracing how this narrative teller reconstitutes himself from ‘victim’ to ‘hero’, this study offers insight into how a local interactional event (e.g., a research interview) may be transformed into a therapeutic exchange. Insights for therapeutic (re)storying, narrative research, and second language (L2) research are discussed.
Membership categorization and storytelling
Authors: Day Dennis , Kjærbeck Susanne
Published: October 2019

In this paper, we demonstrate how the collaborative and sequential unfolding of a story ties into
the constitution of a membership categorization device which we have glossed as ‘us and them’. The data come
from a focus group activity where first and second generation immigrants to Denmark have been asked to discuss
their situation in Denmark. Using Ethnomethodological Conversation and Membership Categorization Analysis, we
present one story which involves a story-teller and his family and an elderly Danish couple living in the same
block of flats. In the telling of the story, co-participants align and affiliate, and disalign and
disaffiliate, at sequentially relevant junctions. We will argue that not only do such phenomena indicate
listenership and possible agreement to the moral of the story in its telling, but also to the morally
implicative categorical work involved in the story’s telling.
Place and membership categorization in a Hawaiian language radio show
Authors: Furukawa Toshiaki
Published: October 2019

Recent articles by prominent scholars of discourse and interaction have renewed the debate over the relationship between membership categorization analysis (MCA) and conversation analysis (CA). Many consider CA and MCA as mutually informing, and that is the position I take in this paper. MCA has been conducted mainly with monolingual data, but in this study I examine Hawaiian language media talk by multilingual speakers. Place formulation is often intertwined with membership categorization, and I investigate how place is used to categorize people. Taking an MCA approach, I analyze the stories co-constructed by a radio show’s host, guest, and callers, all of whom speak predominantly in Hawaiian but occasionally switch into English. The goals of the paper are twofold: (1) to illustrate the procedural consequentiality of initiating, maintaining, and terminating an “ultra-rich topic” (Sacks 1992: 75), that is, place; and (2) to show how place is used to do categorial work.
Moving towards for Active Role for Smart Grid Users: study about the perception of smart grids among domestic consumers in Spain (UPGRID project)(Avanzando hacia el rol activo de los usuarios de las smart grids: estudio sobre la percepción de las redes eléctricas inteligentes entre los consumidores domésticos en España (proyecto UPGRID))
Authors: Herranz-Pascual Karmele , Garcia-Quincoces Eduardo , Diez-Gaspon Itxasne , Bachiller-Prieto Raúl
Published: October 2019

Integrating the perspective of smart grid users is the next challenge to be tackled in order to deploy fully the broad technical development of this new generation of electrical grids and improve the efficacy thereof. This is the conclusion reached by the social research developed within the framework of the European UPGRID project. This paper presents the main findings of the Spanish demonstration, working with domestic electricity consumers. The results indicate that these consumers know little about their contract and consumption of electricity, with regard to smart grids. In spite of this, there is some evidence that there is willingness among these consumers to make a change in their energy use towards more environmentally responsible behaviours, a tendency that needs to be developed so that consumers play an active role, which is essential in order to deliver optimal energy supply through smart grids. However, the results must be taken with a degree of caution, since, in spite of the major drive for recruitment, the sample was small and the experimental mortality between phases was high, so the research presented is exploratory in nature.
STEM - Play, Learn and Work: STEM Education in Academic Club Based on Community and Local Products to Improve a Positive Attitude towards STEM
Authors: Chaiwongsa Punyaphat , Kinboon Nittayaporn , Yanasarn Nessara
Published: October 2019

This paper developed a practical learning activity named “STEM - Play, Learn and Work” to increases students’ interest and engagement in the learning of STEM (Science, Technology, Engineering, and Mathematics). Because we need to show that STEM knowledge and skills can solve everyday problems and promote community and local products, one popular product in our local community is selected as a representative to be the main theme of learning. We designed the project-based learning activity combined various STEM subjects through steps of production for the representative from the beginning to the end. We used an experimental “STEM - Play, Learn and Work” to 19 students in grade ninth – twelfth in class of academic club. The learning outcomes including student performance and attitude towards STEM are discussed. The assessment results (one assessment taken before the activity, one after) show that the activity improved students’ knowledge in STEM subjects significantly. It also increased students’ positive attitude towards STEM and interest in STEM careers. Students have the opportunity to apply their meaningful STEM knowledge and skills to solve problems in everyday life through this practical activity.
The design of STEM Education lessons on statistical mechanics for undergraduate students
Authors: Tipparach Udom , Ruaysap Makabodee , Tipparach Jutamanee , Chanthawara Krittidej
Published: October 2019

Lessons combining of the integration of Science, Technology, Engineering and Mathematics or STEM Education were designed and used to enhance learning activities in a Statistical Mechanics classroom for undergraduate students at Ubon Ratchathani University, Thailand. Three STEM Education activities were introduced into the classroom including, solar drying project, magnetic induction, and heat radiation. The STEM Education activities will be described in details. The students were introduced to STEM Education and problem-based project learning. The students were trained to solve real problems by concentrating on engineering problems and then thoughtfully guided by instructor’s questions to apply all subject matter of Statistical Mechanics (Science) and techniques and student’s skills of Technology, Engineering and Mathematics. The students were able to gain and build up their own knowledge and skills necessary for 21st century. The students were impressed by the STEM Education activities. The students’ satisfactory toward the STEM Education activities was in the highest level.
The effect of SSI overlap STEM Education on Secondary Students’ Socio-scientific decision making
Authors: Siribunnam Siripun , Bednarova Radka , Nuangchalerm Prasart
Published: October 2019

The purpose of this study is to investigate the secondary students’ decision making process when global socio-scientific issue (SSI) is applied to STEM-based learning. SSI overlap STEM framework adapted from the literature was designed to help students to take a responsible informed decision when considering global environmental issue as a part of their classroom activity. Thirty one students participated in the pre- and post-socio-scientific decision-making test. Data was also collected through class observation. Both quantitative and qualitative data were gathered and analysed; content analysis of qualitative data collected from student’s reasoning helped to explain the initial quantitative findings. Based on the qualitative analysis, the results revealed that the students’ abilities benefited from the SSI overlap STEM framework implementation. The results showed that there were considerable changes in the students’ decision making before and after the activity. It also indicated that the SSI overlap STEM framework designed for this study was effective and could be used in science classes.
Using Facebook in Blended Learning in Vietnamese Undergraduate Students
Authors: Thu Huong Dang Thi , Oanh Bui Thi , Kieu Oanh Pham Thi , Luong Luong Khanh
Published: October 2019

The study investigated the use of Facebook as an educational tool as well as the influence of Facebook integration into blended learning environment on English pronunciation teaching and learning activities. The subjects for the study consisted of 30 students who were the first-year English majors at Thai Nguyen University of Education. They were divided into two groups: the experimental group and the traditional group. Besides, there was a student teacher from the same university to be the subject of the experimental group. A combination of qualitative, quantitative and experimental approaches was employed to collect data and students’ views on this model. This allowed the researcher to get hold of a transformation in students’ pronunciation competence and their attitudes towards a blended format with supporting a social networking site (Facebook). The findings of the study indicate that Facebook retains outstanding features to offer a professional online course for English pronunciation learning, such as live lectures, group discussions, schedule events and etc. Furthermore, Facebook benefits the teachers in managing students’ learning autonomy so that the teacher is likely to grasp the ability of individuals in a short time. However, the use of Facebook still remains obstacles in the path of carrying out English pronunciation activities, and when putting it into blended-learning, the model handles these obstacles and limitations in the current learning and teaching of English pronunciation as well.
Assessment of In-service Science Teachers’ Teaching Competencies in Integrated STEM Program
Authors: Lomarak Tepporn , Nuansai Bancha , Promden Worrawat , Sangsila Arunrassame
Published: October 2019

The purpose of the study was to investigate the effects of a professional development instructional program Integrated STEM for elementary schools in a rural context of Thailand which carried out at the Faculty of Education, Buriram Rajabhat University during February 2018. Research instruments were (1) assessment observational record consisted of 5 elements of competencies with 4 levels of rubric criteria including beginning, approaching proficient, proficient, and distinguished levels, (2) achievement test related STEM designed to assess specific science content knowledge. The research findings revealed that the integrated STEM program was recommended to use for developing in-service science teachers’ teaching competencies. From evaluation of experts, the results indicated that competencies’ levels of teaching of in-service science teachers was achieved as approaching proficient level. Moreover, the results of one sample t-test indicated that teachers’ achievement score on science content knowledge after implementing the integrated STEM program was significantly higher than before at the 0.01 level. It can be suggested that in-service training programs should be developed and used for science teachers to raise their awareness of the necessity of STEM education and to enhance their competencies in teaching preparation program.
A STEM Education project for training graduate students for STEM workforce
Authors: Kodtharin Narongsak , Chanonmuang Phuvasa , Tipparach Udom
Published: October 2019

A thesis-based on STEM Education and STEM workforce has been carried out on the topic titled “Hydrogen production from cassava starch by a biological process.” This work is a real world problem of an engineering project that needs to solve by the integration of knowledge and skills in Science, Technology, Engineering, and Mathematics (STEM). The project deals with social need which is hydrogen gas that will serve as environmentally friendly renewable energy in the future. This STEM Education project provides a way to train students to thinks and learn how to think about solving problems by using STEM Education. The work requires students getting involved this project to solve problems and the students have applied their STEM Education skills. The students not only learn STEM Education on the project but also teach others to learn through STEM Education.
Opinions of Primary Science Teachers on 4C3RA+ Guidelines to Design STEM Lesson Plans
Authors: Kaewklom Worakanya , Khumwong Pinit , Dahsah Chanyah
Published: October 2019

The purposes of this study was to investigate the opinions of primary science teachers in 4C3RA+ guidelines. The sample consisted of sixty-two primary science teachers in Sra-Kaew Primary Education, Area Two, and fifteen Si Sa Ket Primary Education, Area Four, selected by purposive sampling and willing to participate in this study. The results found that primary science teachers had opinions on 4C3RA+ guidelines at a good level. Primary science teachers in Sra-Keaw Primary Education, Area Two, had opinions on 4C3RA+ guidelines at a good level

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, and primary science teachers in Si Sa Ket Primary Education, Area Four, had opinions on 4C3RA+ guidelines at an excellent level

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. They mentioned that 4C3RA+ guideline provided a clear view of STEM education. Then it made possibility to design STEM lesson plans using a six-step process based on 4C3RA+ guidelines.
Building a Professional Learning Community with Team Endeavors while Creating Elementary-focused STEM-integrated Lesson Plans
Authors: Krainara S , Chatmaneerungcharoen S
Published: October 2019

This longitudinal study examined the development of pedagogical knowledge of teacher’s participation in a 2-year professional development program that enhanced teacher’s self-efficacy and prompted changes in science instruction in the elementary grades. The purpose of this research was to implement STEM activities which are developed by a professional team. A professional learning community (PLC) was used as a professional development tool helping the teacher increase her Pedagogical Content Knowledge. Collaborative design of STEM science lessons, implementation of the lessons and reflection on outcomes. Collaboration among the educator and teachers was offered in the form of online learning materials, exemplary lessons and the availability of an expert. The researcher participated for one year in the program. Results showed significant increases in teacher’s overall self-efficacy in teaching science, personal efficacy, and outcome expectancy efficacy during the 2 years. The increase of self-efficacy was presented with changes in improved instructional practices, particularly student participation activities. The educators and experts were important in providing pedagogical support during the design and implementation, and reflected with teachers on how to improve on their teaching.
Introducing the process of developing open education program for universities of information technology in Vietnam
Authors: Hao Cao Thi , Bich Nguyen Thi , Hai Anh Nguyen Thi
Published: October 2019

The great achievements made in every field so far have given educators many challenges. In Vietnam, following the guidelines of fundamental and comprehensive education reform, the development of “open education” program is an urgent requirement contributing to the successful implementation of the education reform. The program will provide access to education for all people in need, regardless of age, education level, occupation, social status, gender, and can be implemented at all times and places. In the 4.0 era, the role of IT universities has been well defined. In order to maximize their role, they need to develop an open program. To establish and develop an open education program for Universities of Information Technology, the article proposes a process of eight steps. Step 1: analyzing context and assessing education needs (international context, national, and university context). Step 2: identifying six criteria and four objectives (knowledge, skills, ethics, capability) when developing open programs. Targets must be specific, detailed, easy to review and evaluate. Step 3: reviewing the current program, and designing new program contents. Step 4: selecting the form of training organization. Step 5: organizing examinations and accreditation of education quality, ensuring accuracy, objectivity, seriousness and flexibility in accordance with the training methods, subjects and contents. Step 6: verifying the training programs. Step 7: implementing the program (including two steps: Pilot implementation, evaluation and adjustment; mass implementation applied throughout the university). Step 8: evaluating the program (after implementation, the university collects, analyzes, and processes data to determine the value of the program). With the above process, the open education program will enhance the quality of education, in line with the trend of higher education in the world today. By attaching training goals to real life, to the development of learners’ capacity, IT universities will affirm their “brand”, their advanced and active role in the digital era, and the globalization of education today.
Developing critical thinking of students through STEM educational orientation program in Vietnam
Authors: Linh Nguyen Quang , Duc Nguyen Mau , Yuenyong Chokchai
Published: October 2019

One of the requirements in teaching process is to develop the thinking of learners. Thus, how an educator could organize teaching activities in order to enable the critical thinking ability of students in high school? Based on the stages of the solving process in the learning process of the student, the expression of critical thinking in each stage, the author would like to suggest educational orientation program following STEM system (STEM activities) in order to develop critical thinking of students. This article analyses the impact of using STEM activities on the development of students in some high schools in mountainous regions in the northern part of Vietnam. The results show the development of critical thinking of students through STEM activities and some superior suggestions for using STEM activities to motivate critical thinking of students in high school.
Enhancing scientific literacy – research the case of teaching the topic Water in life
Authors: Tra Do Huong , Thuan Nguyen Thi
Published: October 2019

Scientific literacy has been a strong target in many countries for many years, including Vietnam. Educating students to become future citizens has been emphasized in the science curriculum, with the goal of providing students with the tools so they need to be able to adapt and solve practical issues in a responsible way. The article mentions the proposal for structure of scientific literacy and research the case of enhancing scientific literacy through activities to explore while learning the topic Water in life.
Online training in regular fostering of school science teachers to meet education innovation in Vietnam towards the development of cross-culture teachers
Authors: Son Do Vu
Published: October 2019

Regular fostering teachers is an annual imperative task for the school teachers. This has been stipulated in the Government document, the Ministry of Education and Training (MoET), the (provincial) Departments of Education and Training in Viet Nam. The form of concentrated and periodic fostering teachers as implemented in Vietnam has many limitations, those are: for millions of teachers need fostering and retraining in order to meet the time requirements of education reform, the concentrated fostering is not feasible; professional contents do not meet each local or individual learner; It is costly to spend on classrooms, teaching equipment; costs for teachers and experts; travel, accommodation for concentrated stay are also costly, and time consuming. The article provides regular training form for geography teachers by online training to address the limitations of concentrated regular training while promoting the outstanding advantages of online teaching. This article has developed a number of special subject contents for fostering the social sciences teachers to meet the requirements of current education reform in Vietnam. The article also mentions the possibility of using online training to foster teachers that are qualified to teach in the region and the world.
Implementation of a primary science curriculum designed in accordance with a social constructivist appoarch for Vietnamese Confucian heritage culture
Authors: Thu Hằng Ngô Vu , Bulte Astrid M. W. , Pilot Albert
Published: October 2019

This paper describes the implementation of a social constructivism-based primary science curriculum, which was designed culturally appropriate with Vietnamese Confucian heritage culture. It focuses on analysing a specific science lesson best functioning in classroom practice. Both achievements and shortcomings of the designed science curriculum were uncovered and provided an adequate evaluation to the designed curriculum. This creates a basis for appropriate adjustment and improvement to the curriculum design for a further better application in primary science education in Vietnamese Confucian heritage culture.