# Physical Sciences and Mathematics Commons™

## All Articles in Physical Sciences and Mathematics

209,632 full-text articles. Page 9 of 5823.

Development Of Est Derived Microsatellite Markers In Buffel Grass And Their Cross Transferability To Other Forage Grasses, 2020 Indian Grassland and Fodder Research Institute, India

#### Development Of Est Derived Microsatellite Markers In Buffel Grass And Their Cross Transferability To Other Forage Grasses, Auji Radhakrishna, Krishna Kumar Dwivedi

##### International Grassland Congress Proceedings

Buffel grass (Cenchrus ciliaris L.) is an important perennial grass grown widely in arid and semiarid regions of the world. It is one of the prominent species of the Dichanthium-Cenchrus-Lasiurus grass cover spread over the Peninsular India (Dabadghao and Shankarnarayan, 1973). C. ciliaris is a warm season, C4 grass well adapted to survive harsh conditions, elevated CO2 levels and wide range of climates and soil regimes. It is considered an excellent pasture grass as it provides highly nutritious and palatable forage during drought periods. Despite its excellent forage characteristics genetic improvement through conventional breeding methods has been difficult ...

Ploidy Dependent Expression Of Apomixis Components In Guinea Grass (Panicum Maximum Jacq.), 2020 Indian Grassland and Fodder Research Institute, India

#### Ploidy Dependent Expression Of Apomixis Components In Guinea Grass (Panicum Maximum Jacq.), P. Kaushal, Krishna Kumar Dwivedi, Auji Radhakrishna, Sheena Saxena, Sharmishtha Paul, Ajoy K. Roy, D. R. Malaviya

##### International Grassland Congress Proceedings

Apomixis is an asexual method of reproduction through seeds. The potential of apomixis has been envisaged as “asexual revolution” by virtue of its capacity to fix hybrid vigour, a much desirable feature in breeding of agricultural crops. The genetic mechanism of apomixis regulation is complex and is believed to be largely affected by polyploidy (Nogler 1984). Expression of apomixis essentially contains three components, viz. apomeiosis (formation of unreduced egg cell), parthenogenesis (fertilization independent embryo development) and functional endosperm development (autonomous or psuedogamous). In contrast to previous reports, the evidence has now gathered that these three components can be functionally uncoupled ...

Establishment Of High-Efficiency Agrobacterium-Mediated Transformation Of Callus Derived From Sehima Nervosum, An Important Range Grass Species, 2020 Indian Grassland and Fodder Research Institute, India

#### Establishment Of High-Efficiency Agrobacterium-Mediated Transformation Of Callus Derived From Sehima Nervosum, An Important Range Grass Species, Krishna Kumar Dwivedi, Tanu Sonkar, R. Katiyar, Auji Radhakrishna, P. Kaushal

##### International Grassland Congress Proceedings

Sehima nervosum is one of the important rangeland grass in India, It is commonly known as Saen grass in India, white grass in Australia, and has also been reported from the Central East Africa and Sudan. It is a good forage grass and maybe utilized for grazing as well as for hay preparation. It is a perennial grass, prefers hot and dry climate and survive even in limited rainfalls. As this natural grass is found inherently rich in precursors for several industrially important biomolecules, fractionation of these precursors seems to be a promising endeavour. Production of nutraceuticals (prebiotic xylo-oligosaccharides) from ...

Transcriptome Analysis Of Differentially Expressed Genes At Pre-Meiotic Developmental Stage In Pennisetum Hybrids With Contrasting Modes Of Reproduction, 2020 Indian Grassland and Fodder Research Institute, India

#### Transcriptome Analysis Of Differentially Expressed Genes At Pre-Meiotic Developmental Stage In Pennisetum Hybrids With Contrasting Modes Of Reproduction, Krishna Kumar Dwivedi, Auji Radhakrishna, D. R. Malaviya, Ajoy K. Roy, P. Kaushal

##### International Grassland Congress Proceedings

Apomixis is an asexual reproduction through seeds where embryo develops without meiosis and fertilization. It is widely distributed throughout plant kingdom, but is more prevalent in families like Asteraceae, Rosaceae and Poaceae (Carman, 1997). This trait is highly desirable for fixing heterosis in F1 hybrids with significant implications for crop improvement (Dwivedi et al., 2007). Therefore it is necessary to unravel the molecular and genetic basis of apomixis to tap its potential. Pennisetum is an important genus of the Poaceae family which contains a wide range of species exhibiting wide variability in morphological, molecular, and reproductive traits (Jauhar, 1998). It ...

Differential Gene Expression Patterns Of Male Sterile Lines Of Alfalfa Hybrids At Bud Differentiation Stage And Heterosis, 2020 Inner Mongolia Academy of Forestry Monitoring, China

#### Differential Gene Expression Patterns Of Male Sterile Lines Of Alfalfa Hybrids At Bud Differentiation Stage And Heterosis, Liyan Cai, Fengling Shi, Cuiping Gao, Fengyan Yi, Xia Gao

##### International Grassland Congress Proceedings

Alfalfa (Medicago sativa L.) is important legume forage that is widely cultivated in China and other countries. Alfalfa breeding can’t meet the need of production now, highlighted in yield and resistance of current alfalfa cultivars (He et al., 2000; Wei et al., 2007). Increasing heterozygosity of hybrids and thus the heterosis is a way to breed alfalfa cultivars with high yield and resistance (Hong et al., 2009). The objective of this study was to investigate the correlations of various differential gene expression patterns with forage yield in order to better understand the role the alfalfa male sterile lines may ...

2020 San Jose State University

#### Using Color Thresholding And Contouring To Understand Coral Reef Biodiversity, Scott Vuong Tran

##### Master's Projects

This paper presents research outcomes of understanding coral reef biodiversity through the usage of various computer vision applications and techniques. It aims to help further analyze and understand the coral reef biodiversity through the usage of color thresholding and contouring onto images of the ARMS plates to extract groups of microorganisms based on color. The results are comparable to the manual markup tool developed to do the same tasks and shows that the manual process can be sped up using computer vision. The paper presents an automated way to extract groups of microorganisms based on color without the use of ...

Implementing Tontinecoin, 2020 San Jose State University

#### Implementing Tontinecoin, Prashant Pardeshi

##### Master's Projects

One of the alternatives to proof-of-work (PoW) consensus protocols is proof-of- stake (PoS) protocols, which address its energy and cost related issues. But they suffer from the nothing-at-stake problem; validators (PoS miners) are bound to lose nothing if they support multiple blockchain forks. Tendermint, a PoS protocol, handles this problem by forcing validators to bond their stake and then seizing a cheater’s stake when caught signing multiple competing blocks. The seized stake is then evenly distributed amongst the rest of validators. However, as the number of validators increases, the benefit in finding a cheater compared to the cost of ...

2020 Southern Methodist University

#### Sensitivity Analysis For Incomplete Data And Causal Inference, Heng Chen

##### Statistical Science Theses and Dissertations

In this dissertation, we explore sensitivity analyses under three different types of incomplete data problems, including missing outcomes, missing outcomes and missing predictors, potential outcomes in \emph{Rubin causal model (RCM)}. The first sensitivity analysis is conducted for the \emph{missing completely at random (MCAR)} assumption in frequentist inference; the second one is conducted for the \emph{missing at random (MAR)} assumption in likelihood inference; the third one is conducted for one novel assumption, the sixth assumption'' proposed for the robustness of instrumental variable estimand in causal inference.

Soil Moisture Contributions To Insar Phase And Decorrelation, 2020 Southern Methodist University

#### Soil Moisture Contributions To Insar Phase And Decorrelation, Yusuf Eshqi Molan

##### Earth Sciences Theses and Dissertations

Interferometric synthetic aperture radar (InSAR) provides capability to detect surface deformation. Between two SAR images, in addition to ground surface deformations, changes may happen in the surface parameters such as soil moisture, vegetation layer water content, and so on. Despite deformation, the other changes may not be of interest for a common InSAR analysis and an ordinary InSAR analysis rarely takes into account their influences on InSAR phase and coherence. The effect of the changes on InSAR phase and coherence can potentially impede accurate estimation of ground surface deformation but also can open new window into soil moisture retrieval and ...

Statistical Models And Analysis Of Univariate And Multivariate Degradation Data, 2020 Southern Methodist University

#### Statistical Models And Analysis Of Univariate And Multivariate Degradation Data, Lochana Palayangoda

##### Statistical Science Theses and Dissertations

For degradation data in reliability analysis, estimation of the first-passage time (FPT) distribution to a threshold provides valuable information on reliability characteristics. Recently, Balakrishnan and Qin (2019; Applied Stochastic Models in Business and Industry, 35:571-590) studied a nonparametric method to approximate the FPT distribution of such degradation processes if the underlying process type is unknown. In this thesis, we propose improved techniques based on saddlepoint approximation, which enhance upon their suggested methods. Numerical examples and Monte Carlo simulation studies are used to illustrate the advantages of the proposed techniques. Limitations of the improved techniques are discussed and some possible ...

2020 Southern Methodist University

#### The Boundary Element Method For Parabolic Equation And Its Implementation In Bem++, Sihao Wang

##### Mathematics Theses and Dissertations

The goal of this work is to develop a fast method for solving Galerkin discretizations of boundary integral formulations of the heat equation. The main contribution of this work is to devise a new fast algorithm for evaluating the dense matrices of the discretized integral equations.

Similar to the parabolic FMM, this method is based on a subdivision of the matrices into an appropriate hierarchical block structure. However, instead of an expansion of the kernel in both space and time we interpolate kernel in the temporal variables and use of the adaptive cross approximation (ACA) in the spatial variables.

The ...

2020 Southern Methodist University

#### Evaluation Of The Utility Of Informative Priors In Bayesian Structural Equation Modeling With Small Samples, Hao Ma

##### Department of Education Policy and Leadership Theses and Dissertations

The estimation of parameters in structural equation modeling (SEM) has been primarily based on the maximum likelihood estimator (MLE) and relies on large sample asymptotic theory. Consequently, the results of the SEM analyses with small samples may not be as satisfactory as expected. In contrast, informative priors typically do not require a large sample, and they may be helpful for improving the quality of estimates in the SEM models with small samples. However, the role of informative priors in the Bayesian SEM has not been thoroughly studied to date. Given the limited body of evidence, specifying effective informative priors remains ...

The Distribution Of The Greatest Common Divisor Of Elements In Quadratic Integer Rings, 2020 CUNY Bernard M Baruch College

#### The Distribution Of The Greatest Common Divisor Of Elements In Quadratic Integer Rings, Asimina S. Hamakiotes

##### Student Theses

For a pair of quadratic integers n and m chosen randomly, uniformly, and independently from the set of quadratic integers of norm x or less, we calculate the probability that the greatest common divisor of (n,m) is k. We also calculate the expected norm of the greatest common divisor (n,m) as x tends to infinity, with explicit error terms. We determine the probability and expected norm of the greatest common divisor for quadratic integer rings that are unique factorization domains. We also outline a method to determine the probability and expected norm of the greatest common divisor of ...

2020 Virginia Commonwealth University

#### The Statistical Estimation Of The Basic Reproduction Number And Other Parameters Of Seir Stochastic Epidemic Models. Case Study- Influenza, Divine Wanduku

##### Biology and Medicine Through Mathematics Conference

No abstract provided.

On The Optimization Of Biological Field Effect Transitors, 2020 National Institute of Standards and Technology

#### On The Optimization Of Biological Field Effect Transitors, Ryan M. Evans, Arvind Balijepalli, Anthony Kearsley

##### Biology and Medicine Through Mathematics Conference

No abstract provided.

Spreading Mechanics And Differentiation Of Astrocytes During Retinal Development, 2020 University of Florida

#### Spreading Mechanics And Differentiation Of Astrocytes During Retinal Development, Tracy Stepien, Timothy W. Secomb

##### Biology and Medicine Through Mathematics Conference

No abstract provided.

2020 Southern New Hampshire University

#### Global Sensitivity Analysis Of A Physiologically-Based Pharmacokinetic (Pbpk) Model Of Bromochloromethane, Megan Sawyer

##### Biology and Medicine Through Mathematics Conference

No abstract provided.

The Role Of Diversity Amplification For Personal Protection Control Strategies In Vector-Borne Disease Models, 2020 University of Maryland

#### The Role Of Diversity Amplification For Personal Protection Control Strategies In Vector-Borne Disease Models, Jeffery Demers, Sharon Bewick, Justin M. Calabrese, William F. Fagan

##### Biology and Medicine Through Mathematics Conference

No abstract provided.

Density-Dependent Development Impacts The Success Of Wolbachia-Based Mosquito Control Programs, 2020 University of the Sciences in Philadelphia

#### Density-Dependent Development Impacts The Success Of Wolbachia-Based Mosquito Control Programs, Alyssa Petroski, Lauren M. Childs, Michael Andrew Robert

##### Biology and Medicine Through Mathematics Conference

No abstract provided.

2020 Virginia Commonwealth University

#### Saving Lives, Limbs And Healthcare Costs]{Saving Lives, Limbs And Healthcare Costs: Quantifying The Impact Of Chg Bathing And Effective Leadership On The Reduction Of Hospital-Acquired Infections, Kelly A. Reagan

##### Biology and Medicine Through Mathematics Conference

No abstract provided.