94 research outputs found
Adopting the edTPA as a High-Stakes Assessment: Resistance, Advocacy, and Reflection in Illinois
The edTPA, a national performance assessment for teacher candidates, has seen rapid adoption across the country since its development in 2009. Against the national backdrop of high stakes testing and accountability, the edTPA was developed to be an indicator of teachers’ readiness to teach. The varying perspectives and responses to edTPA in Illinois range from resistance and advocacy, to thoughtful reflection and programmatic changes to best prepare teacher candidates for success. In this paper we explore how Illinois institutions have responded to the adoption of edTPA as a high stakes assessment consequential for teacher licensure. Using a “politics of policy” (Cochran-Smith, Piazza, & Power, 2013) framework, this research aims to examine these divergent responses across the state
CLINICO – MYCOLOGICAL PROFILE OF DERMATOPHYTIC INFECTIONS
Objective: The objective of this study was to isolate and identify the dermatophytic infected patients attending Perunduarai IRT Medical College and Hospital, Erode.Methods: The samples of skin, nail and hair from patients having the sign of superficial mycoses were gathered over a period of one year. The clinical material was examined microscopically by KOH mount and the culture was done on Sabouraud dextrose agar, Potato dextrose agar Dermatophyte test agar medium and incubated at 28-30 °C.Results: The demographic data shows that the men (82%) were highly susceptible to the infection; the infected age group is between 15-30 y (74%). In that students, (28%) were highly exposed to Tinea corporis and Tinea cruris infection.Conclusion: The results of the study suggested that the preliminary information on the prevalence and distribution of dermatophytes in the area of sampling. So the knowledge of the efficient screening, management, reduction and treatment of the dermatophytic infection should be fruitful in the future.Keywords: Skin, KOH mount, Dermatophyte test medium (DTM), Tinea cruri
Techniques to Enhance the Quality of Service of Multi Hop Relay Networks
AbstractBroadband internet access through the user equipment has become the hot research topic. The shadowing and multipath issues restrict the high performance nature of 4G cells. In Multi hop Relay (MHR) networks, Relay Stations (RS) are introduced to improve coverage and capacity of the system. There exist some issues like path selection and RSs deployment, which severely affects the Quality of Service (QoS) of the system. In this paper, to improve the QoS of MHR networks, Load Aware Routing Metric (LARM) based path selection and a low complex Burst Profile (BP) based RS deployment schemes are discussed
Yield maximization of direct sown rice (Oryza sativa l.) under water constraint situation
More efficient water management practices need to be adopted for better sustainable rice production grown under traditional areas due to increased water scarcity. Among the different water management practices, efficient new generation water-saving chemicals and organic products were used to conserve water under field condition. An experiment was conducted to evaluate the yield maximization in direct sown CO51 rice (Oryza sativa L.) under water constraint situation. The main plot treatments comprised of three levels of irrigation viz., Conventional irrigation (M1), Tensiometer based irrigation (M2) and Deficit irrigation (M3), respectively and were tested with four different water conservation practices in sub-plots viz., soil application of water-saving crystals (WSC) @ 5 kg ha-1 (S1), foliar application of drought shield @ 3 litres ha-1 (S2 ), soil application of humic granules @ 2.5 kg ha-1 (S3) and soil application of FYM @ 12.5 t ha-1 (S4). Experimental results indicated that Tensiometer based irrigation with soil application humic granules @ 2.5 kg ha-1 M2S3) recorded higher number of panicles m-2 (411) and number of filled grains panicle-1 (108.16) in direct-sown rice. However, M2S3 recorded significantly maximum grain yield (6352 kg ha-1) and minimum (3940 kg ha-1) in (M3S4) deficit irrigation applied with FYM @12.5 t ha-1 in the year 2018 Sornavari season, respectively. Thus the Tensiometer based irrigation with soil application of humic granules @ 2.5 kg ha-1 can be a feasible approach for increasing grain yield and conserve water in north eastern region of Tamil Nadu, by promoting water use efficiency method in direct rice cultivation areas.
The Need for Effective Early Behavioral Family Interventions for Children with Attention Deficit Hyperactivity Disorder (ADHD)
There is a pressing need for the development of effective early family intervention programs for children showing Attention Deficit Hyperactivity Disorder (ADHD) behaviours with Conduct Disorder (CD) or Oppositional Defiant Disorder (ODD) behaviours. Previous research has indicated that children with ADHD are at risk of developing comorbid CD or ODD behaviours. In addition, it has been shown that ODD or CD behaviours in childhood tend to persist and to have adverse effects on later social adjustment. However, ODD or CD behaviours are not necessary concomitants of ADHD, and it has been demonstrated that behavioural intervention can have both short- and long term beneficial effects for children showing early signs of ODD or CD behaviours. In short term, behavioural family interventions may be able to reduce oppositional behaviour, particularly in the preschool years. In the long term, early intervention has shown to reduce the incidence of later antisocial behaviour in children at risk for this developmental trajectory. In this paper, it will be argued that behavioural family interventions have not been effectively utilised or promulgated in the community for children with ADHD despite the demonstrated efficacy of these types of interventions. A model of a multilevel system of intervention that can be tailored to the individual family’s needs is presented
Structural Color Production in Melanin-based Disordered Colloidal Nanoparticle Assemblies in Spherical Confinement
Melanin is a ubiquitous natural pigment that exhibits broadband absorption
and high refractive index. Despite its widespread use in structural color
production, how the absorbing material, melanin, affects the generated color is
unknown. Using a combined molecular dynamics and finite-difference time-domain
computational approach, this paper investigates structural color generation in
one-component melanin nanoparticle-based supra-assemblies (called supraballs)
as well as binary mixtures of melanin and silica (non-absorbing)
nanoparticle-based supraballs. Experimentally produced one-component melanin
and one-component silica supraballs, with thoroughly characterized primary
particle characteristics using neutron scattering, produce reflectance profiles
similar to the computational analogues, confirming that the computational
approach correctly simulates both absorption and multiple scattering from the
self-assembled nanoparticles. These combined approaches demonstrate that
melanin's broadband absorption increases the primary reflectance peak
wavelength, increases saturation, and decreases lightness factor. In addition,
the dispersity of nanoparticle size more strongly influences the optical
properties of supraballs than packing fraction, as evidenced by production of a
larger range of colors when size dispersity is varied versus packing fraction.
For binary melanin and silica supraballs, the chemistry-based stratification
allows for more diverse color generation and finer saturation tuning than does
the degree of mixing/demixing between the two chemistries.Comment: 40 pages, Figure
Modeling Structural Colors from Disordered One-Component Colloidal Nanoparticle-based Supraballs using Combined Experimental and Simulation Techniques
Bright, saturated structural colors in birds have inspired synthesis of
self-assembled, disordered arrays of assembled nanoparticles with varied
particle spacings and refractive indices. However, predicting colors of
assembled nanoparticles, and thereby guiding their synthesis, remains
challenging due to the effects of multiple scattering and strong absorption.
Here, we use a computational approach to first reconstruct the nanoparticles'
assembled structures from small-angle scattering measurements and then input
the reconstructed structures to a finite-difference time-domain method to
predict their color and reflectance. This computational approach is
successfully validated by comparing its predictions against experimentally
measured reflectance and provides a pathway for reverse engineering colloidal
assemblies with desired optical and photothermal properties.Comment: 14 pages, 3 figures, 1 ToC figur
Mechanism of Structural Colors in Binary Mixtures of Nanoparticle-based Supraballs
Inspired by structural colors in avian species, various synthetic strategies
have been developed to produce non-iridescent, saturated colors using
nanoparticle assemblies. Mixtures of nanoparticles varying in particle
chemistry (or complex refractive indices) and particle size have additional
emergent properties that impact the color produced. For such complex
multi-component systems, an understanding of assembled structure along with a
robust optical modeling tool can empower scientists to perform intensive
structure-color relationship studies and fabricate designer materials with
tailored color. Here, we demonstrate how we can reconstruct the assembled
structure from small-angle scattering measurements using the computational
reverse-engineering analysis for scattering experiments (CREASE) method and
then use the reconstructed structure in finite-difference time-domain (FDTD)
calculations to predict color. We successfully, quantitatively predict
experimentally observed color in mixtures containing strongly absorbing melanin
nanoparticles and demonstrate the influence of a single layer of segregated
nanoparticles on color produced. The versatile computational approach presented
in this work is useful for engineering synthetic materials with desired colors
without laborious trial and error experiments.Comment: 23 Pages, 5 Figures, 1 ToC Figur
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