1,722,256 research outputs found
sj-docx-1-hej-10.1177_00178969231222543 – Supplemental material for Perceived barriers and facilitators of childcare providers’ physical activity: A mixed-methods study
No full textSupplemental material, sj-docx-1-hej-10.1177_00178969231222543 for Perceived barriers and facilitators of childcare providers’ physical activity: A mixed-methods study by Priyanka Chaudhary, John P Rech, Gaurav Kumar and Danae Dinkel in Health Education Journal</p
Designing Air-Independent Slippery Rough Surfaces for Condensation
No full textDue to copyright restrictions and/or publisher's policy full text access from Treasures at UT Dallas is limited to current UTD affiliates (use the provided Link to Article).Enhancing condensation heat transfer is significant for power generation, heat exchangers, water harvesting, and air-conditioning. While superhydrophobic surfaces (SHS) are widely studied for condensation, this type of surface suffers from several weaknesses: (1) the hydrophobic surface chemistry does not favor nucleation, (2) the air lubricant has poor thermal conductivity, and (3) the air pocket may be displaced at an elevated humidity or subcooling. Patterned SHS can enhance vapor nucleation in the hydrophilic domains, but the superhydrophobic domains still rely on the air lubricant, resulting in the same weakness as SHS. Recently, the liquid infused surfaces have been developed by replacing the air lubricant with liquid lubricant, leading to more robust lubrication for liquid repellency. However, the original design of liquid infused surfaces shows a flat lubricant-water interface, which cannot provide a large contact area for heat transfer. Here, we successfully designed and manufactured the air-independent slippery rough surfaces (SRS) by conformal liquid lubrication on the rough solid surfaces. The surface chemistry of the SRS is governed by the liquid lubricant, not the solid textures, and the roughness is determined by the lubricated microtextures. Droplets are highly mobile on this air-independent slippery rough surface in the absence of air lubricant. Our comprehensive models provide rational design and optimization for the air-independent slippery rough surface that is highly desired in condensation heat transfer. © 2019 Elsevier LtdNational Science Foundation, United States (NSF) Award No. 1929677Erik Jonsson School of Engineering and Computer Scienc
A Review on Cosmetic Preparation of Hair
No full textHair is an integrated system with a particular chemical and physical behaviour. It is a complex structure of several morphological components that act as unit and has several functions, from protecting of skins to sexual and social communications. In literature, there are various study about hair that take into consideration different aspects within many fields of science, including biology, dermatology, cosmetics ,forensic science and medicine. These review the formulations and mode of action of hair cosmetics, summarized the principal anatomical and physiological aspect of different types of human hair, hair growth cycle, hair porosity. This review could be the basic improvement and progression in the field of hair research. Abujam Nganthoi Devi | Zakariya Noorani | Gaurav Kumar Sharma "A Review on Cosmetic Preparation of Hair" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-4 , June 2018, URL: https://www.ijtsrd.com/papers/ijtsrd12933.pd
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Structural investigations on semiconducting donor-acceptor block copolymers and related model systems for organic photovoltaics
Full text linkMikrophasenseparierte Donor-Akzeptor Blockcopolymere wurden als ideale Systeme für die Kontrolle der Morphologie in der organischen Photovoltaik diskutiert. Nanostrukturierte Grenzflächen (Exzitonendiffusionslänge ~ 10 nm), kristalline Ordnung und Durchflusspfade sind Grundvoraussetzungen für hohe Transport- und Geräteeigenschaften. Grundlegende Aspekte von strukturbildenden Prozessen, Phasenverhalten und mikrostruktureller Ordnung in einem halbleitenden Donor-Akzeptor Blockcopolymer, Poly(3-hexylthiophento-much-space)-block-Poly(Perylenbisimid Acrylat) (P3HT-b-PPerAcr), und Modellhomopolymere werden im Bulk und in dünnen Schichten analysiert. Untersuchungen an Bulkproben zeigen Mikrophasenseparation im P3HT-b-PPerAcr Material sowohl in der Schmelze als auch bei Raumtemperatur. Die Kristallisation der einzelnen Komponenten erfolgt innerhalb der abgetrennten Mikrostrukturen, ohne die Morphologie der Mikrophasen zu beeinflussen. Eine Erhaltung dieser Mikrophasenmorphologie kann in dünnen Filmen beobachtet werden. Die Studie verdeutlicht eine direkte Korrelation zwischen der Morphologie und den Eigenschaften des Ladungstransports in den mikrophasenseparierten Donor-Akzeptor Blockcopolymeren. Diese Systeme können ambipolaren Ladungstransport aufrechterhalten, wobei die genauen Werte der Elektronen- und Löcherbeweglichkeit im Blockcopolymer stark von der Größe und Ausrichtung der Mikrodomänen, als auch der Kristallinität innerhalb der Domänen abhängen.Microphase separated donor-acceptor block copolymers have been discussed as ideal systems for morphology control in organic photovoltaics. Nanostructured interfaces (exciton diffusion length ~ 10 nm), crystalline order and percolation pathways are pre-requisites for obtaining high transport and device properties. Fundamental aspects of structure formation processes, phase behavior and microstructural order in a semiconducting donor-acceptor block copolymer poly(3-hexylthiophene)-block-poly(perylene bisimide acrylate) (P3HT-b-PPerAcr) and model homopolymers are studied in bulk and thin films. Investigations on bulk samples reveal microphase separation in the P3HT-b-PPerAcr material in the molten state and at room temperature. Confined crystallization of the individual components occurs within the microphase separated structures without altering the microphase morphology. The observed microphase morphology is found to be preserved in thin films. The study elucidates a direct correlation between the morphology and charge transport properties in the microphase separated donor-acceptor block copolymers. These systems can sustain ambipolar charge transport, but the exact values of electron and hole mobilities in the block copolymer depend strongly on size and orientation of the microdomains as well as the crystallinity within the domains.von Gaurav Kumar Gupt
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Crop residue management in India: Stubble burning vs. other utilizations including bioenergy
No full textIn recent studies, various reports reveal that stubble burning of crop residues in India generates nearly 150 million tons of carbon dioxide (CO2), more than 9 million tons of carbon monoxide (CO), a quarter-million tons of sulphur oxides (SOX), 1 million tons of particulate matter and more than half a million tons of black carbon. These contribute directly to environmental pollution, as well as the haze in the Indian capital, New Delhi, and the diminishing glaciers of the Himalayas. Although stubble burning crop residue is a crime under Section 188 of the Indian Penal Code (IPC) and the Air and Pollution Control Act (APCA) of 1981, a lack of implementation of these government acts has been witnessed across the country. Instead of burning, crop residues can be utilized in various alternative ways, including use as cattle feed, compost with manure, rural roofing, bioenergy, beverage production, packaging materials, wood, paper, and bioethanol, etc. This review article aims to present the current status of stubble-burning practices for disposal of crop residues in India and discuss several alternative methods for valorization of crop residues. Overall, this review article offers a solid understanding of the negative impacts of mismanagement of the crop residues via stubble burning in India and the other more promising management approaches including use for bioenergy, which, if widely employed, could not only reduce the environmental impacts of crop residue management, but generate additional value for the agricultural sector globally.Natural Sciences and Engineering Research Council of Canada (NSERC)DG Gran
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