bluuebunny/crossref_metadata_2025_split huggingface dataset:
Luminescent Sol-Gel Coatings Based on Nanophosphors
Authors: Pénard Anne-Laure , Gacoin Thierry , Boilot Jean-Pierre 
Published: June 2019

AbstractNanoparticles of lanthanide vanadate (YVO4:Ln) and phosphate (LaPO4:Ln) are obtained by simple aqueous syntheses. The nanoparticles obtained are stabilized in colloidal suspensions and deposited in sol-gel films by spin-coating using a silicate as inorganic binder. The influence of the thermal treatment on the brightness and the ability to achieve multilayer coatings are discussed.
From Single Molecules to Nanoscopically Structured Functional Materials
Authors: Tremel Wolfgang , Therese Helen Annal , Tahir Muhammad Nawaz , Zink Nicole , Eberhardt Marc , Theato Patrick , Schröder Hans Christian , Müller Werner E. G. 
Published: June 2019

AbstractThe synthesis of MS2 (M = Mo, W) onion-like nanoparticles by means of a high temperature MOCVD process starting from W(CO)6 and elemental sulfur is reported. The reaction can also be carried out in two steps where the intermediate amorphous WS2 nanoparticles formed through the high temperature reaction of tungsten and sulfur in the initial phase of the reaction are isolated and converted in a separate annealing step to onion-type WS2 nanoparticles. Based on a study of the temperature dependence of the reaction a set of conditions could be derived where onion-like structures were formed in a one-step reaction. Onion-like structures obtained in the single-step process were filled, whereas the particles obtained by the two-step procedure were systematically hollow. A model could be devised to rationalize the different outcome of the reactions. The MOCVD approach therefore allows a selective synthesis of open and filled fullerene-like chalcogenide nanoparticles. Furthermore, we demonstrate the novel surface functionalization of WS2 nanotubes with polymeric ligands by complexation with a combination of Ni2+ via an scorpionate-type nitrilotriacetic acid (NTA) and immobilization of TiO2 nanoparticles onto the surface of nanotubes. Synthesis of such a functional polymeric ligand was achieved via a reactive polymer precursor route.
3-D Photonic Band Structure Engineering in Self-Assembled Macroporous Photonic Crystals
Authors: Bartl Michael H. , Carter Kaycee , Bartl Michael H. 
Published: June 2019

AbstractBy applying directional pressure along the (111) crystal axis of opaline photonic crystals under controlled temperatures, inverse opals with symmetry broken structures are fabricated. This selective deformation results in strongly modified photonic band structures and hence optical properties of the photonic crystals. Experimental data are accompanied by theoretical band structure calculations that confirm the experimental results and are used to predict new structures with optimized band gap properties.
Pulsed Laser Deposited Oxide Green Emitting Thin Film Phosphors : Optimization of Growth Conditions
Authors: Thiyagarajan P. , Kottaismay M. , Ramachandra Rao M S 
Published: June 2019

AbstractStructural and photoluminescence (PL) properties of Zn2(1-x)MnxSiO4 (1 ≤ x ≤ 5) and diffuse reflectance spectroscopy (DRS) and morphological studies of ZnGa2O4:Mn thin film green emitting phosphors grown using pulsed laser deposition (PLD) technique have been investigated. Zn2(1-x)MnxSiO4 thin films grown on Si substrate at 700°C in 300 mTorr of oxygen partial pressure, upon ex-situ annealing at higher temperatures exhibit superior PL intensity. ZnGa2O4:Mn phosphor thin films grown on quartz substrate at 650oC and in-situ annealed in 300mTorr of oxygen partial pressure show better emission intensity. For both Zn2SiO4:Mn and ZnGa2O4:Mn phosphors, luminescence can be assigned to 4T1 – 6A1 transition of Mn2+ within the 3d orbital giving rise to emission at 525 and 503 nm, respectively.
Synthesizing Phosphors Through Microwave Process
Authors: Fang Chris Y. , Agrawal Dinesh K. , Fu Ming , Coveleskie Joan M. , Chau Chung-nin , Walck James , Roy Rustum 
Published: June 2019

AbstractVarious Lamp phosphors, including [Ca10(PO4)6(Cl,F):Sb:Mn], (Y,Eu)2O3 (YOE), BaMgAl10O17:Eu (BAM), and (La,Ce)PO4:Ce:Tb (LAP), with or without flux, have been synthesized by a microwave processing technique in a multimode microwave furnace operating at 2.45 GHz. The microwave-synthesized phosphors were comprehensively characterized for particle size, specific surface area, brightness, and luminescence. Although most properties of the microwave-synthesized phosphors were comparable to that of the conventional products, the kinetics of the phosphor synthesis was substantially enhanced in the microwave processing. As a result, the soaking time at the final temperature was reduced by up to 90% compared to a conventional process. In addition, the required synthesis temperature was also lowered by 100-200°C in microwave process, compared to the conventional process for these lamp phosphors. Certain improved property was also observed in some microwave synthesized samples. The mechanism and advantages of microwave process for the lamp phosphor synthesis through solid-state reaction are addressed.
Oxidative Degradation of Atomized Iron Controlled By the Nanostructured Environment
Authors: Rawat Naveen , Gudyaka Russel , Mohit Kumar , Santhanam Kalathur S.V. 
Published: June 2019

AbstractA large number of composited materials of atomized iron and multiwalled carbon nanotubes have been prepared and sintered at 850°C for one hour. The sintered samples were examined for thermal and for electrochemical corrosion of atomized iron. The results suggest that the composited materials are free from oxidative degradation. The absence of oxidation of atomized iron in nanocomposited environment is attributed to the configurational geometry and spintronics type interaction proposed in recent theoretical calculations.
Topochemical Strategies for the Formation of Alkali-metal Halide Arrays within Perovskite Hosts
Authors: Viciu Liliana , Zhang Xiao , Kodenkandath Thomas A. , Golub Valdimir , Josepha Elisha , Wiley John B. 
Published: June 2019

AbstractMultistep topochemical reactions can be used to construct alkali-metal halide arrays within layered perovskite hosts. Combinations of ion exchange and reductive intercalation (A = Li) or reductive and oxidative intercalation (A = Rb) allow one to prepare the compounds such as (A2Cl)LaNb2O7. These products consist of perovskite blocks separated by double alkali-metal halide layers where the local layer structure is dependent on the size of the alkali cation. Details on the synthesis and structures of these materials are presented, and the general utility of the topochemical strategies used in their preparation is discussed.
Perovskite BaCeO3 as a New Redox Host for Catalytic Pd Nanoparticles
Authors: Li Jun , Seshadri Ram 
Published: June 2019

AbstractWe have examined the ability of a carefully chosen perovskite, BaCeO3, to act as a redox host for noble metals, notably Pd, in the hope of producing an “intelligent” catalyst where palladium is absorbed into the host lattice as ions under oxidative conditions and released as elemental Pd under reducing conditions. Pd-substituted perovskites BaCe1-xPdxO3-δ (0 ≤ x ≤ 0.1) were prepared by solid-state reactions in pure oxygen. The crystal structure was refined in the orthorhombic space group Pnma. Palladium was found to be driven in and out of the perovskite lattice upon repeated redox cycles by detailed XRD study. SEM/EDX revealed the formation of perovskite nanowires and nanorods when reducing Pd-substituted BaCeO3 up to 1000°C.
Enhancing the Success of Undergraduates in Engineering: A Teaching Workshop for Faculty and TAs
Authors: Isaacs J. A. 
Published: June 2019

ABSTRACTAmong undergraduates with math SAT scores above 600, the four most commonly cited concerns leading to switching majors from science, math, engineering and technology (SMET) include: (a) poor teaching by SMET faculty, (b) lack or loss of interest in science, (c) belief that non-SMET majors hold more interest, or offers a better education, and (d) feeling overwhelmed by the pace and load of curriculum demands [1]. Less than 50% of students who begin the study of engineering complete their education in the field. In 1999, approximately 150,000 students entered freshmen engineering programs in the United States; approximately 75,000 will not complete an engineering curriculum. The losses of these students from SMET majors occur at a time of increased demand for greater numbers of skilled graduates in engineering.In order to retain students in engineering programs and produce a pool of technically skilled graduates that is currently needed, serious efforts are required to improve the quality of instruction in these programs. Teaching is the primary concern, since it is reflected in points (a) through (d) above, and therefore, improvements in teaching skills will have the greatest impact on our students. Since most teaching assistants (TAs) and new faculty have no formal training in instruction and assessment, there is a great need for systematic programs for teaching these instructors to improve their classroom effectiveness.The National Science Foundation funded an extremely successful faculty enhancement workshop entitled “Teaching Teachers to Teach Engineering”, T4E, (1996–1998), which then evolved to the American Society of Civil Engineers' Excellence in Civil Engineering Education (ExCEEd) Program. This “learn by doing” workshop format ensures that participants will make substantive improvements in their teaching skills by the end of one week; it is touted a “be good” program rather than a “feel good” program. The adaptation of these programs as teaching workshops for new faculty and TAs at Northeastern University is discussed in light of our GE Master Teacher Program – a funded initiative to improve the success of freshman engineering students at NU.
The Trials and Errors of Collaborative Learning: A New Faculty Perspective
Authors: Gleixner Stacy H. 
Published: June 2019

ABSTRACTThere are a number of teaching techniques that have proven very useful in involving the students and increasing their learning. As a new faculty member, I have chosen to improve my teaching by first implementing collaborative learning exercises into my classes. The exercises I have used include in-class group problem solving, informal study groups, and group term projects. In this paper, I will detail the published benefits of collaborative learning that led me to use this in my classes. The introduction of collaborative learning exercises into my lectures has also brought a number of problems and fears including time constraints, the practical issues of forming groups in large classes, and the barrier students have towards working together. From the perspective of a new faculty, I will discuss the problems I have had implementing collaborative work into my classes and tips for avoiding and overcoming the problems I have encountered.
Teaching Engineers Materials Selection via the Internet: The Issue of Diverse Student Backgrounds
Authors: Sun Y.Q. , Economy J. 
Published: June 2019

ABSTRACTThe recent advances in the internet communication technologies have provided convenient access to education for time-restricted and place-bound students. This article discusses the opportunities and implications for materials science and engineering educators to reach out, via online courses, to students engaged in a broad range of engineering disciplines. Based on observations in the design and online delivery of a course on the selection of materials, we shall examine in particular the issue of diverse student backgrounds and interests and discuss the benefits and problems of teaching a diverse student body.
Infusing MSE Topics into Non-MSE Curricula: A Multidisciplinary Effort
Authors: Pai Devdas M. , Sankar Jagannathan , Lee Clinton B. 
Published: June 2019

ABSTRACTFaculty members at the authors' institution are involved in multidisciplinary materials research through a National Science Foundation funded center. One goal of this center is to empower materials education through the incorporation of research outcomes into the undergraduate and graduate curricula. There are currently no MSE degree programs on this campus; therefore, a variety of means is being employed to infuse MSE information into non-MSE curricula. In addition to classroom lectures and case studies, students receive an extramural exposure to the multidisciplinary aspects of MSE by engaging in team or individual projects that exploit fully the center's facilities and resources. Benefits are being experienced in terms of a heightened enrollment of students in graduate MSE programs, and increased placement of students in materials related positions in industry. The paper describes the status of these efforts.
Materials Science And Engineering Education In Estonia
Authors: Mellikov Enn , Kulu Priit , Öpik Andres 
Published: June 2019

ABSTRACTThe background of Estonian higher education in materials science and engineering is given and results of the reform of the higher education system in the Republic of Estonia are described. The formation of Centers of Strategic Competence in Materials Science is highlighted as one of the main results of this reform. The activities and results in the field of the development of an internationally recognized science-based curriculum for under- and postgraduate studies are described.
Learning Materials Science Via the Web Using Nanospheres and Scanning Probe Microscopes
Authors: Ong Eddie W. , Mossman Kenneth , Ramakrishna B.L. , Pizziconi Vincent B. , Glaunsinger William S. , Patrick Eric , Vishwanath Prashanth , Allagadda Kranti , Tan Terence , Razdan Anshuman 
Published: June 2019

ABSTRACTThe Interactive Nano-Visualization for Science and Engineering Education (IN-VSEE) project at Arizona State University (ASU) has developed a remotely operable scanning probe microscope (SPM), a visualization gallery of images, and a number of educational modules with materials themes. It exploits the incredible potential of materials science for teaching at the high school and college level about fundamental concepts that cross traditionally separated disciplines. The packing of spheres is a topic that is ideal for linking together the different science and engineering disciplines because of the ubiquity and relevance of spheres in the materials world and the universality of the rules that govern their packing over a large range of sizes. Students can perform a number of discovery-based learning activities, over the web by simultaneously using IN-VSEE's web-accessible module (e.g., The Music of Spheres) and by accessing the remotely-operable SPM for experimenting with nanosphere samples that they prepare. With these resources students can pose materials questions and are empowered to design their experiments to increase their understanding of real materials. The fundamental concepts (e.g., packing geometry, density, surface composition, long-range/short-range ordering, intermolecular forces, etc.) they learn through these materials science experiments are applicable to many other curricular, research, and technology areas.
Laboratory Activities Used in a Sophomore Materials Science Course at Texas A&M University
Authors: Griffin R. B. , Epps A.L. , Hartwig K. T. 
Published: June 2019

AbstractA sophomore materials science course has been developed at Texas A&M University as part of a larger five course sequence through the support of the National Science Foundation. Texas A&M University is a member of the NSF sponsored Foundation Coalition. The courses were developed to include active and collaborative learning, application of technology, and integration as important components. Currently, a majority of departments within the College of Engineering (COE) at Texas A&M University have adopted the five-course sequence. During fall 99, the COE is teaching the materials course to 260 students or four sections of 70 students each.As part of the development of the materials class, a series of experiments have been developed for use within the classroom. The experiments give the students an opportunity to experience hands-on activities. Several of the activities are done within the classroom, while others are performed in a separate laboratory building. The classes consist of two- 1 h 50 min. periods, and this time provides the opportunity to have the laboratory activities in class. The experiments encourage the development of teams and support various applications of materials science. The majority of students have very limited laboratory experience, and this course provides them an opportunity to develop some laboratory skills. Currently, we do seven experiments: 4-point bending, tensile test: metals and polymers, heat treatment, thermal conductivity, viscosity demonstration, and electrical components. In the paper and during the presentation, we will demonstrate several of the experiments and provide examples of student work. A detailed description of each experiment will be included in the paper.
Semiconducting Polymers for Multidisciplinary Education
Authors: Braun David , Kingsbury Kevin , Vanasupa Linda 
Published: June 2019

ABSTRACTCal Poly is in the process of revolutionizing how science and engineering students learn about semiconducting materials. Semiconducting polymers currently attract widespread attention as the subjects of numerous research and development projects. Semiconducting polymers are also excellent materials with which to teach structure-property relationships, polymer synthesis, polymer film preparation, optical and electronic properties, semiconductor device fabrication principles, and device testing.One key benefit of these materials is that they encourage student participation in educational activities that bridge several disciplines. Semiconducting polymers improve student learning by making normally obscure semiconductor concepts more tangible for students in several disciplines: chemistry students create electronics applications for the compounds they synthesize, materials engineering students learn about opto-electronics techniques, and electrical engineering students gain hands-on experience with core concepts in semiconductor devices.This presentation describes the interdisciplinary projects that students and faculty have participated in thus far, particularly during the phase of lab design and construction.
Singaporean Societies: Multimedia Communities of Student Migration
Authors: Dang Xuan Thu , Nicholas Howard , Starks Donna 
Published: June 2019

Studies of home language use tend to focus on macro-level language changes and verbal communication rather than on micro-level analyses of family communication. This makes it diffcult to form a nuanced picture of the relations among diverse resources deployed in transnational family communication. In this paper, we address this issue by reporting results from a preliminary study of the micro-level communicative interactions of a frst-generation transnational Australian Vietnamese family who have settled in Melbourne, Australia. Through an in-depth analysis of a 20-minute video clip, we capture intersections in the rich, diverse communicative resources used by the family as they watched a favourite English television program while simultaneously keeping in contact with family members overseas. Our analysis shows that transnational family communication patterns involve complex displays of language use, silence, touch, movement, and spatial orientation, which together enable the family to communicate in the here and now with individuals near and far. We use the multiplicity framework to interpret the fuidity of multimodal communication, intimacy, and continuity across space.
Rohingya Muslims in Malaysia: Finding (Imperfect) Heaven in Polymedia
Authors: Nisa Eva F 
Published: June 2019

The condition of Rohingya Muslims, who for decades have faced a humanitarian crisis, especially in their homeland of Rakhine State, Myanmar, has attracted international attention and sympathy. This article focuses on Rohingya Muslims living in a transit country, Malaysia. Drawing on ethnographic feldwork conducted in Malaysia between 2015 and 2017, this article examines the efforts of Rohingya Muslims to reestablish familial bonds with relatives with whom they had lost touch as a result of a series of crises. The article analyses the role of polymedia in the life of Rohingya Muslims, particularly the impact of polymedia among youth and activists who centre their efforts on Rohingya Muslims. The article expands on the available work regarding the use of communication technologies in times of crisis by focusing on the ways in which young Rohingya Muslims use communication technologies to amplify their voices and establish a connected presence in their distributed and disrupted family lives. By claiming their place in a polymedia-rich environment, young Rohingya Muslims have found a “virtual heaven”—albeit an imperfect one—by embracing the freedom to use their voices through a wide variety of communication technologies. Living in their country of asylum, Malaysia, they can play a signifcant role as bridging agents who both raise awareness of the plight of Rohingya in Myanmar and work together with those living in resettlement countries to solve the complex problems arising from persecution, displacement, and statelessness.
Voice of Singapore’s Invisible Hands: Indonesian Migrant Domestic Workers and Poems on Home and Family
Authors: Rahajeng Mintarsih Adriana 
Published: June 2019

Yoga Prasetyo, the son of an Indonesian migrant domestic worker (MDW) in Singapore, founded Voice of Singapore’s Invisible Hands (or The Voice) in late 2016. A nonproft organisation that aims to challenge the negative discourses about MDWs, especially among Singaporeans, The Voice uses Facebook to promote its members’ literary work and achievements, as well as to share stories to inspire migrant workers.
ARTICULATION OF WOMEN THROUGH THE LENS OF INTERSECTIONALITY AND ITS DIMENSIONS IN ‘ONE PART WOMAN’ AND ‘SINGAREVVA AND THE PALACE’
Authors: Saleh Alyahya Dr. Rimah 
Published: June 2019

Purpose of the Study: This paper aims to articulate women through the lens of intersectionality and its dimensions in ‘One Part Woman’ and ‘Singarevva and the Palace’. The research addresses the issues faced by ideologically, culturally, and materially deprived women of the society.
Methodology: In order to achieve the purpose of the study, two novels, namely, ‘One Part Woman’ (by Perumal Murugan) and ‘Singarevva and the Palace’ (by Chandrasekhar Kambar), were critically analyzed.
Results: It is inferred that the two novels helped to understand the nature and variety of community, class, and gender. It is found that there is a difference in the community attitude towards the barrenness of women. In the case of ‘One Part Woman’, the community permits her to go to the chariot festival and choose any stranger to attain motherhood, whereas in the case of ‘Singarevva and the Palace’, the community does not allow her to attain motherhood outside her marriage. It is found that the gender of women is the cause of various oppressions due to which women’s rights are denied. It is inferred that Ponna and Singarevva transcend their marital relationships to attain motherhood. It is seen that female sexuality is meant only for motherhood and for the benefit of the progeny. Thus, women’s sexuality is also oppressed.
Implications: Women face distressful situations, agony, and pain arising out of patriarchal ties, such as caste, class, community, religion, sexuality, and gender. Women play the role of a mother, daughter, wife, sister, friend, etc. She deserves a better position and status in the society. The oppressions faced by women form hurdles in their lives. They are the care takers of the family and they need to be respected and given a good rank in the society.