compendia types: Published Papers(130) Journal or Magazine Articles(44) Working Papers(1) Problem Sets(1) Books(1)

research fields: Computer and Information Sciences(175) Statistics(2) Econometrics(2)

151 through 175 of 272 results

Material Science & Engineering

Mahendra Kumar Trivedi, Gopal Nayak

In Mn3O4, the crystal structure, dislocation density, particle size and spin of the electrons plays crucial role in modulating its magnetic properties. Present study investigates impact of Biofield treatment on physical and atomic properties of Mn3O4. X-ray diffraction revealed the significant effect of biofield on lattice parameter, unit cell volume, molecular weight, crystallite sizes and densities of treated Mn3O4. XRD analysis confirmed that crystallinity was enhanced and dislocation density was effectively reduced by 80%. FTIR spectroscopic analysis revealed that Mn-O bond strength was significantly altered by biofield treatment. Electronic spin resonance analysis showed higher g-factor of electron in treated Mn3O4 ...

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American Journal of Chemical Engineering

Mahendra Kumar Trivedi, Alice Branton, Dahryn Trivedi, Gopal Nayak

Nitrophenols are the synthetic organic chemicals used for the preparation of synthetic intermediates, organophosphorus pesticides, and pharmaceuticals. The objective of the present study was to evaluate the effect of biofield energy treatment on the isotopic abundance ratios of PM+1/PM, and PM+2/PM in o- and m-nitrophenol using the gas chromatography-mass spectrometry. The o- and m-nitrophenol were divided into two parts - one part was control sample, and another part was considered as biofield energy treated sample, which received Mr. Trivedi’s biofield energy treatment (The Trivedi Effect®). The biofield energy treated nitrophenols having analyzed at different time intervals were designated as T1, ...

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Pharmaceutica Analytica Acta

Mahendra Kumar Trivedi, Alice Branton, Dahryn Trivedi, Gopal Nayak

The stable isotope ratio analysis is widely used in several scientific fields such as agricultural, food authenticity, biochemistry, metabolism, medical research, etc. Resorcinol is one of the most versatile chemicals used for the synthesis of several pharmaceuticals, dyes, polymers, organic compounds, etc. The current research work was designed to investigate the impact of the biofield energy treatment on the isotopic abundance ratios of 13C/12C or 2H/1H or 17O/16O (PM+1/PM) and 18O/16O (PM+2/PM) in resorcinol using Gas chromatograph - mass spectrometry (GC-MS) technique. Resorcinol was divided into two parts - one part was control and another part was considered as biofield ...

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William John Youden

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Journal of Financial Economics (2001)

Christopher S. Jones

This code implements two factor extraction methods: the heteroskedastic factor analysis (HFA) of Jones (2001) and the asymptotic principal components procedure (CK) of Connor and Korajczyk (1986). The HFA method can improve the quality of the extracted factors by allowing for heteroskedastic residuals. Besides, it does not require any extra assumptions to those in CK. The user must specify a T*N matrix of returns and the number of factors to extract. The number of iterations in the optimization process is by default set to 5. The minimum allowable average ideosyncratic standard deviation is by default set equal to .001.

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Socio-Economic Planning Sciences

Paul W. Wilson

A software package for computing non-parametric efficiency estimates, making inference, and testing hypotheses in frontier models. Commands are provided for bootstrapping as well as computation of some new, robust estimators of efficiency, etc.

FEAR consists of a software library that can be linked to the general-purpose statistical package R. The routines included in FEAR allow the user to compute DEA estimates of technical, allocative, and overall efficiency while assuming either variable, non-increasing, or constant returns to scale. The routines are highly flexible, allowing measurement of efficiency of one group of observations relative to a technology defined by a second, reference ...

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Duke University

Department of Stastical Science first year exam questions.

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Centre interuniversitaire de recherche en analyse des organisations (2009)

John W. Galbraith, Dongming Zhu Coders: John W. Galbraith, Dongming Zhu

This code estimates the parameters for the model AST and for the models AST with restrictions: AST with α=0.5, SST (AST with v1=v2) and ST (SST with α=0.5). It also gives, for each model, the goodness-of-fit measures and the predictive performance for expected shortfall risk.

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Uppsala University (2009)

Anders Eriksson, Daniel Preve, Jun Yu Coders: Daniel Preve, Jun Yu

This code proposes one-step-ahead forecasts for realized volatility by relying on a parsimonious and flexible non-negative semiparametric model. This model uses the Box-Cox power transformation to induce normality and reduce heteroskedasticity. The persistence parameters are estimated in a two-stage procedure based on extreme-value theory, while the distributional form of the error is unspecified. Out of sample evaluation criteria of the model forecasting abilities are included. The code requires a series of realized volatility and a cut-off point (the last observation used to fit the model for the first forecast). The user can choose between the fixed, rolling and recursive schemes. ...

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Modern Chemistry & Applications

Mahendra Kumar Trivedi, Alice Branton, Dahryn Trivedi, Gopal Nayak

Ammonium acetate and ammonium chloride are the white crystalline solid inorganic compounds having wide application in synthesis and analytical chemistry. The aim of present study was to evaluate the impact of biofield treatment on spectral properties of inorganic salt like ammonium acetate and ammonium chloride. The study was performed in two groups of each compound i.e., control and treatment. Treatment groups were received Mr. Trivedi’s biofield treatment. Subsequently, control and treated groups were evaluated using Fourier Transform Infrared (FT-IR) and Ultraviolet-Visible (UV-Vis) spectroscopy. FT-IR spectrum of treated ammonium acetate showed the shifting in wavenumber of vibrational peaks with respect to ...

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Randall Munroe

Another xkcd graphic, showing the folly of frequentist hypothesis testing.

Subtitle: Did the sun just explode? (It's night, so we're not sure)

Image caption: 'Detector! What would the Bayesian statistician say if I asked him whether the--' [roll] 'I AM A NEUTRINO DETECTOR, NOT A LABYRINTH GUARD. SERIOUSLY, DID YOUR BRAIN FALL OUT?' [roll] '... yes.'

This work is licensed under a Creative Commons Attribution-NonCommercial 2.5 License.

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The Astrophysical Journal

Lior Shamir

We describe Ganalyzer, a model-based tool that can automatically analyze and classify galaxy images. Ganalyzer works by separating the galaxy pixels from the background pixels, finding the center and radius of the galaxy, generating the radial intensity plot, and then computing the slopes of the peaks detected in the radial intensity plot to measure the spirality of the galaxy and determine its morphological class. Unlike algorithms that are based on machine learning, Ganalyzer is based on measuring the spirality of the galaxy, a task that is difficult to perform manually, and in many cases can provide a more accurate analysis ...

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American Journal of Chemical Engineering

Mahendra Kumar Trivedi, Alice Branton, Dahryn Trivedi, Gopal Nayak

p-tert-Butyphenol (PTBP) is a phenolic monomer used in the synthesis of numerous industrially useful chemicals. The current research work aimed to evaluate the effect of the biofield energy treatment on the isotopic abundance ratios of PM+1/PM and PM+2/PM in PTBP using gas chromatography - mass spectrometry (GC-MS). The sample, PTBP was distributed into two parts - one part was designated as control PTBP and another part was considered as biofield energy treated PTBP. The biofield energy treatment was achieved through unique biofield energy transmission process by Mr. Trivedi (also known as The Trivedi Effect®). T1, T2, T3, and T4 were ...

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American Journal of Physical Chemistry

Mahendra Kumar Trivedi, Alice Branton, Dahryn Trivedi, Gopal Nayak

Methyl-2-napthylether (nerolin) is an organic compound and has the applications in pharmaceutical, and perfume industry. The stable isotope ratio analysis is increasing importance in various field of scientific research. The objective of the current study was to evaluate the effect of the biofield energy treatment on the isotopic abundance ratios of PM+1/PM (2H/1H or 13C/12C or 17O/16O) and PM+2/PM (18O/16O)in nerolin using the gas chromatography-mass spectrometry (GC-MS). The compound nerolin was divided into two parts - one part was control sample (untreated), and another part was considered as biofield energy treated sample which was received the biofield energy treatment through ...

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Earth System Science Data

R. Sander, A. A. P. Pszenny, W. C. Keene, E. Crete, B. Deegan, M. S. Long, J. R. Maben, A. H. Young

The data files are in NASA Ames Format. A full description of the data set has been submitted to Earth System Science Data (http://www.earth-system-science-data.net/).

We report mixing ratios of soluble reactive trace gases sampled with mist chambers and the chemical composition of bulk aerosol and volatile inorganic bromine (Brg) sampled with filter packs during the Reactive Halogens in the Marine Boundary Layer (RHaMBLe) field campaign at the Cape Verde Atmospheric Observatory (CVAO) on São Vicente island in the tropical North Atlantic in May and June 2007. The gas-phase data include HCl, HNO3, HONO, HCOOH, CH3COOH, NH3, and volatile reactive chlorine ...

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The Lancet

Minoli A Perera, Larisa H Cavallari, Nita A Limdi, Eric R Gamazon, Anuar Konkashbaev, Roxana Daneshjou, Anna Pluzhnikov, Dana C Crawford, Jelai Wang, Nianjun Liu, Nicholas Tatonetti, Stephane Bourgeois, Harumi Takahashi, Yukiko Bradford, Benjamin M Burkley, Robert J Desnick, Jonathan L Halperin, Sherief I Khalifa, Taimour Y Langaee, Steven A Lubitz, Edith A Nutescu, Matthew Oetjens, Mohamed H Shahin, Shitalben R Patel, Hersh Sagreiya, Matthew Tector, Karen E Weck, Mark J Rieder, Stuart A Scott, Alan HB Wu, James K Burmester, Mia Wadelius, Panos Deloukas, Michael J Wagner, Taisei Mushiroda, Michiaki Kubo, Dan M Roden, Nancy J Cox, Russ B ...

VKORC1 and CYP2C9 are important contributors to warfarin dose variability, but explain less variability for individuals of African descent than for those of European or Asian descent. We aimed to identify additional variants contributing to warfarin dose requirements in African Americans. We did a genome-wide association study of discovery and replication cohorts. Samples from African-American adults (aged ≥18 years) who were taking a stable maintenance dose of warfarin were obtained at International Warfarin Pharmacogenetics Consortium (IWPC) sites and the University of Alabama at Birmingham (Birmingham, AL, USA). Patients enrolled at IWPC sites but who were not used for discovery made ...

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Discrete & Computational Geometry (2006)

David Donoho

This code provides graphics of the lower bound on the neighborliness threshold (rho_N), the lower bound on the sectional neighborliness threshold (rho_S) and the one for face-numbers (rho_F) for high-dimensional centrally-symmetric polytopes. It also presents the behavior of the exponents for the combinatorial prefactor, external and internal angle. For more information, please visit the SparseLab (Seeking Sparse Solutions to Linear Systems of Equations) website (http://sparselab.stanford.edu/).

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Journal of Financial Econometrics (2004)

Laurent E. Calvet, Adlai J. Fisher Coders: Laurent E. Calvet, Adlai J. Fisher

This code implements the Maximum-Likelihood (ML) estimation of a Markov-Switching Multifractal process. It focuses on the simple case where M is a binomial random variable taking values m0 or 2-m0 with equal probability. The full parameter vector is then (b, m0, γk, σ), where m0 characterizes the distribution of the multipliers, σ is the unconditional standard deviation of returns, and b and γk define the set of switching probabilities. User can provide starting values of ML optimization (optional) and choose the number of volatility frequencies (between 1 and 10), denoted kbar. Results display the four estimated parameters, the Log-Likelihood and ...

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Bioinformatics

A. Roberts, H. Pimentel, C. Trapnell, L. Pachter

We describe a new “reference annotation based transcript assembly” problem for RNA-Seq data that involves assembling novel transcripts in the context of an existing annotation. This problem arises in the analysis of expression in model organisms, where it is desirable to leverage existing annotations for discovering novel transcripts. We present an algorithm for reference annotation based transcript assembly and show how it can be used to rapidly investigate novel transcripts revealed by RNA-Seq in comparison with a reference annotation.

Supplementary Information: The assemblies compared in the Results section are provided along with the publication at the journal’s website.

Availability: ...

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Nature Protocols

Jianxing Feng, Tao Liu, Bo Qin, Yong Zhang, Xiaole Shirley Liu

Model-based analysis of ChIP-seq (MACS) is a computational algorithm that identifies genome-wide locations of transcription/chromatin factor binding or histone modification from ChIP-seq data. MACS consists of four steps: removing redundant reads, adjusting read position, calculating peak enrichment and estimating the empirical false discovery rate (FDR). In this protocol, we provide a detailed demonstration of how to install MACS and how to use it to analyze three common types of ChIP-seq data sets with different characteristics: the sequence-specific transcription factor FoxA1, the histone modification mark H3K4me3 with sharp enrichment and the H3K36me3 mark with broad enrichment. We also explain how to ...

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F1000Research

Mike L Smith, Keith A. Baggerly, Henrik Bengtsson, Matthew E. Ritchie, Kasper D. Hansen

The IDAT file format is used to store BeadArray data from the myriad of genomewide profiling platforms on offer from Illumina Inc. This proprietary format is output directly from the scanner and stores summary intensities for each probe-type on an array in a compact manner. A lack of open source tools to process IDAT files has hampered their uptake by the research community beyond the standard step of using the vendor’s software to extract the data they contain in a human readable text format. To fill this void, we have developed the illuminaio package that parses IDAT files from any ...

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Industrial Engineering & Management

Mahendra Kumar Trivedi, Alice Branton, Dahryn Trivedi, Gopal Nayak

Barium titanate, perovskite structure is known for its high dielectric constant and piezoelectric properties, which makes it interesting material for fabricating capacitors, transducer, actuator, and sensors. The perovskite crystal structure and lattice vibrations play a crucial role in its piezoelectric and ferroelectric behavior. In the present study, the barium titanate powder was subjected to biofield treatment. Further, the control and treated samples were characterized using X-ray diffraction (XRD) and Fourier transform infrared spectrometer (FT-IR) and Electron spin resonance (ESR).The XRD analysis showed the permanent compressive strain of 0.45% in treated barium titanate powder as compared to control. Furthermore, the biofield ...

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Industrial Engineering & Management

Mahendra Kumar Trivedi, Alice Branton, Dahryn Trivedi, Gopal Nayak

Antimony sulfide (Sb2S3) has gained extensive attention in solar cells due to their potential as a low-cost and earth abundant absorber material. In solar cell absorber, the optoelectrical properties such as energy band gap and absorption coefficient of Sb2S3play an important role, which have strong relationships with their crystal structure, lattice parameter and crystallite size.

Hence in the present investigation, Sb2S3 powder samples were exposed to biofield treatment, and further its physical, structural and spectral properties are investigated. The particle size analysis showed larger particle size and surface area after treatment. X-ray diffraction (XRD) analysis revealed polycrystalline orthorhombic structure with ...

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Genome Biology

Adam Roberts, Cole Trapnell, Julie Donaghey, John L Rinn, Lior Pachter

The biochemistry of RNA-Seq library preparation results in cDNA fragments that are not uniformly distributed within the transcripts they represent. This non-uniformity must be accounted for when estimating expression levels, and we show how to perform the needed corrections using a likelihood based approach. We find improvements in expression estimates as measured by correlation with independently performed qRT-PCR and show that correction of bias leads to improved replicability of results across libraries and sequencing technologies.

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Journal of Econometrics (2012)

Alastair R Hall, Otilia Boldea, Sanggohn Han

This code consistently estimates multiple breaks in linear models with endogenous regressors, via the 2SLS criterion. It contains both an artificially generated DGP and real data to estimate break in the New Keynesian Phillips curve for US. Please read the readme file in the zip file attached for more info.

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151 through 175 of 272 results