184 research outputs found
An assessment of wheat (Triticum aestivum L.) genotypes under saline and waterlogged compacted soil conditions, I: grain yield and yield components
A pot experiment was conducted to study effects of salinity and waterlogging under soil compaction conditions on grain yield and yield components of wheat. Treatments were arranged in a factorial layout assigned to a randomized complete design with three replications. Treatment combinations included: two sets of compaction levels, i.e. non-compacted and compacted soil; four abiotic stresses, i.e. non-saline aerobic (untreated silt loam texture soil having ECe = 3 dS m-1); saline × aerobic (S) (ECe 15 dS m-1); saline × waterlogged (S×W); and waterlogged alone (W) were applied; and two Iranian wheat genotypes i.e. Kouhdasht and Tajan. Compaction was achieved by dropping a 5 kg weight, 20 times from 70 cm height on a wooden block placed on top of soil-filled pots. In non-waterlogged treatments, soil water was maintained at 70% of available water holding capacity (AWHC). Waterlogging was achieved by maintaining water up to 110% of the soil’s AWHC for 25 days during tillering stage. Compaction significantly intensified effect of all other treatments, except waterlogging, on grain yield and yield components of wheat genotypes as compared to control. S×W caused significantly higher reduction in grain yield and yield components for both genotypes than other treatments
An assessment of wheat (Triticum aestivum L.) genotypes under saline and waterlogged compacted soil conditions, II: leaf ion concentrations
A pot experiment was conducted to study effects of salinity and waterlogging under soil compaction conditions on grain yield and yield components of wheat. Treatments were arranged in a factorial layout assigned to a randomized complete design with three replications. Treatment combinations included: two sets of compaction levels, i.e. non-compacted and compacted soil; four abiotic stresses, i.e. non-saline aerobic (untreated silt loam texture soil having ECe = 3 dS m-1); saline × aerobic (S) (ECe 15 dS m-1); saline × waterlogged (S×W); and waterlogged alone (W) were applied; and two Iranian wheat genotypes i.e. Kouhdasht and Tajan. Compaction was achieved by dropping a 5 kg weight, 20 times from 70 cm height on a wooden block placed on top of soil-filled pots. In non-waterlogged treatments, soil water was maintained at 70% of available water holding capacity (AWHC). Waterlogging was achieved by maintaining water up to 110% of the soil’s AWHC for 25 days during tillering stage. S×W caused significantly higher reduction in K+ concentration for both genotypes than other treatments. S×W also resulted in higher leaf Na+ and Cl- concentrations in comparison to other treatments. Kouhdasht maintained significantly higher K + concentration and K+: Na+ ratio at S and S×W treatments than that Tajan (under both non-compacted and compacted soil conditions)
Towards a Measure of Trustworthiness to Evaluate CNNs During Operation
Due to black box nature of Convolutional neural networks (CNNs), the
continuous validation of CNN classifiers' during operation is infeasible. As a
result this makes it difficult for developers or regulators to gain confidence
in the deployment of autonomous systems employing CNNs. We introduce the
trustworthiness in classification score (TCS), a metric to assist with
overcoming this challenge. The metric quantifies the trustworthiness in a
prediction by checking for the existence of certain features in the predictions
made by the CNN. A case study on persons detection is used to to demonstrate
our method and the usage of TCS
Streaming multimedia over WMSNs: an online multipath routing protocol
Routing is a challenge to Wireless Multimedia Sensor Networks (WMSNs) for
supporting multimedia applications due to nodes' energy constraints and
computational capabilities, and the ways sensor nodes obtain forwarding
information. In this paper, we propose an online multipath routing protocol
that uses nodes' positions to make forwarding decisions at each hop. Real-time
decisions are made without any need to have the entire network topology
knowledge. The protocol achieves load-balancing and minimises nodes' energy
consumption by utilizing: (a) smart greedy forwarding scheme for selecting next
hop, and (b) walking back forwarding scheme to bypass network holes.
Performance comparisons of the proposed protocol (schemes) are made with TPGF
and GPSR. The results show that our schemes: (a) maximise the overall network
lifespan by not draining energy from some specific nodes, (b) provide QoS
delivery for video streams by using best nodes along the route, and (c) scale
better in high density WMSN
Effectiveness of Care for Child Development Program on the Sensitivity and Responsiveness Skills of Mothers
Abstract
Objectives
The Present study aimed to analyze the Impact of “Care for Child Development" program on the sensitivity and responsiveness skills of mothers of children who are at risk of developmental delay.
Materials & Methods
This study is a quasi-experimental research planned in pretest-posttest with experimental and control groups. The statistical population included all mothers with children at risk of developmental delay in Tabriz. 50 mothers were selected through purposive sampling. Then, they were randomly divided into two groups of 25 (one experimental group and one control group). The experimental group received training about the program of “Care for child Development “ in 4 group session, while the control group did not receive the same training . The social-emotional assessment/evaluation measure family profile (SEAM TM family profile) and maternal caregiving quality scale were the research measurement tools. The obtained data were evaluated by analysis of covariance (ANCOVA) and independent t-test using SPSS software version 20.
Results
There was a significant difference between the experimental and control groups in maternal caregiving quality and responsiveness, provision of appropriate activities, predictable programs, and provision of play environment and safe home (P <0.05).
Conclusions
The results showed that the ‘care for child development’ program has positive effect on sensitivity and responsiveness skills of mothers of at risk children and could be considered and applied as a practical plan in national health policies
DIRA: Dynamic Domain Incremental Regularised Adaptation
Autonomous systems (AS) often use Deep Neural Network (DNN) classifiers to
allow them to operate in complex, high-dimensional, non-linear, and dynamically
changing environments. Due to the complexity of these environments, DNN
classifiers may output misclassifications during operation when they face
domains not identified during development. Removing a system from operation for
retraining becomes impractical as the number of such AS increases. To increase
AS reliability and overcome this limitation, DNN classifiers need to have the
ability to adapt during operation when faced with different operational domains
using a few samples (e.g. 100 samples). However, retraining DNNs on a few
samples is known to cause catastrophic forgetting. In this paper, we introduce
Dynamic Incremental Regularised Adaptation (DIRA), a framework for operational
domain adaption of DNN classifiers using regularisation techniques to overcome
catastrophic forgetting and achieve adaptation when retraining using a few
samples of the target domain. Our approach shows improvements on different
image classification benchmarks aimed at evaluating robustness to distribution
shifts (e.g.CIFAR-10C/100C, ImageNet-C), and produces state-of-the-art
performance in comparison with other frameworks from the literature
Spatial Characterization of Fraunhofer Diffraction in a Four-Level Light-Matter Coupling System
We explore the spatial features of various orders of Fraunhofer diffraction
patterns in a four-level N-type atomic system. The system interacts with a weak
probe light, a standing wave (SW) coupling field in the x-direction, and a
cylindrical beam of composite optical vortex type. We derive the first-order
linear and third-order cross-Kerr nonlinear parts of the probe susceptibility
by expanding the probe susceptibility of the system into the second order of
the SW beam. This allows us to solve the integral equation of Fraunhofer
diffraction, decoding its varying degrees to specific degrees of Bessel
functions containing the nonlinear susceptibility. Notably, the nonlinear
susceptibility exhibits dependence on the Orbital Angular Momentum (OAM) of the
light beam, leading to spatial variations in the Bessel functions and,
consequently, in the different orders of Fraunhofer diffraction. Leveraging the
manipulation of OAM, we achieve precise control over the spatial mapping of
diverse diffraction orders at various locations. Our research sheds new light
on the spatial behavior of Fraunhofer diffraction in complex atomic systems. It
presents exciting prospects for harnessing the OAM characteristics of light in
future optical technologies
An exploratory study to identify critical factors of innovation culture in organizations
During the past two decades, there has been a growing trend on knowledge-based organizations. Innovation, on the other hand, plays essential role on building competitive business units. In this paper, we present an exploratory study to identify critical factors of innovation culture in organizations. We detect important factors influencing innovation culture in construction industry based on the implementation of factor analysis. The proposed study designs a questionnaire and distributes it among 400 experts who are involved in construction industry. Cronbach alpha has been calculated as 0.779, which validates the overall questionnaire. The results of factor analysis have indicated that six factors of building cultural infrastructures, education, organizational vision, established culture, strategic culture and flexible culture are the most important items influencing innovation culture
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