Using R For Flexible Modelling Of Pre-Clinical Combination Studies. Chris Harbron Discovery Statistics AstraZeneca
|
|
- Virgil Armstrong
- 6 years ago
- Views:
Transcription
1 Using R For Flexible Modelling Of Pre-Clinical Combination Studies Chris Harbron Discovery Statistics AstraZeneca
2 Modelling Drug Combinations Why? The theory An example The practicalities in R 2 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
3 Why Drug Combinations? Making better use of our assets Some marketed compounds are combinations e.g. Symbicort In some disease areas, e.g oncology, HIV, polypharmacy is the norm Compounds licensed only for use in combination with a specific other agent Lapatinib (GSK Breast cancer) is approved for use in combination with capecitabine Increased molecular & pathway level understanding Hypothesise and understanding synergistic actions Link with systems biology 3 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
4 Combination Studies [B] [A] 4 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
5 Combination Studies [B] Benefit? : Better than monotherapy Synergy? : More effect than expected [A] 5 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
6 Assessing Synergy Loewe Additivity IC70 IC50 IC30 Based around sham synergy or self synergy A combination of a compound with itself should give the same effect as a monotherapy at the sum of the doses. Effect Contours IC30 IC50 IC70 6 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
7 Interaction Index Berenbaum Combination Index Chou & Talalay IC70 IC50 IC30 τ = d A + D A d D IC30 IC50 IC70 B B Doses in Combination ICx s for the two compounds where x is the response shown by the combination 7 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
8 Interaction Index Berenbaum Combination Index Chou & Talalay IC70 IC50 IC30 τ τ d + d τ = A B DA DB = fraction of expected dose, assuming additivity, required to have same effect IC30 IC50 IC70 8 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
9 Interaction Index Berenbaum Combination Index Chou & Talalay IC70 IC50 IC30 τ = d A + D A d D IC30 IC50 IC70 B B τ < 1 τ =1 τ >1 Synergy Additivity Antagonism 9 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
10 Interaction Indices Wish to calculate these: With standard errors / confidence intervals Statements of confidence significance tests Use more flexibly and powerfully Combining combination doses together Overall assessments of synergy Covering a wide variety of situations Inactive agent Partial Response Agent Multiple Plates / Experiments 10 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
11 Unified Tau d D 1 = d A τ ( i DA A A ) + + d D d B B B τ D B ( i) d d A A and Where τ (i) is either: a constant response surface (with discontinuities at the axes) a separate value for each point Berenbaum s interaction index a separate value for each ray (segment) a separate value for each dose level of a compound could fit tau as a continuous function of dose or ray or d B d B = > 0 0 Monotherapies Combinations 11 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
12 An Example Monotherapies Combinations 12 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
13 EDA Suggests Synergy At Higher Doses Of Drug A 13 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
14 Identify Individual Combinations Significantly Demonstrating Synergy 14 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
15 Estimates Of Synergy With 95% CIs Overall & For Different Dose Levels 15 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
16 Fitting in R fit <- mynls(formula, start=inits) Robust version of nls() response ~ tau.model(..) Flexibly building formula as.formula(paste( )) Selection of starting parameters Formula expressed as 1 ~ f(y, parameters) Not Y ~ f(parameters) Iterative fitting 16 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
17 Flexibly Building Formula Varying number of combination parameters to be fit: as.formula(paste( resp ~ tau.model(parameters, paste("logtau", 1:ntaus, sep="", collapse=","), gp= c(",paste(groupindex,collapse=","), )) )) Build as a text string, then convert to a formula Varying numbers of tau parameters Convert group index vector into a text string in the right format 17 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
18 Iterative Fitting of Formula Iterative Non-linear curve-fitting performed by nls() : monotherapy and tau parameters tau.model(d 1,d 2,m 1,m 2,lower 1,lower 2,ldm 1,ldm 2,taus) For each observation : Make initial estimate of Y Calculate D 1 & D 2 monotherapies required to achieve Y using Hill equation Adjust Y up or down depending on whether d1 d2 τ ( i) τ ( i) + is >1 or < 1 D D 18 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R Iterate until Y is accurately estimated Based on code developed by Lee et al 2
19 mynls() : A less temperamental nls() Parameter Estimates Calculate Deviance Calculate Direction Calculate Test Parameters =Estimates + Factor * Direction Calculate New Deviance Reduced Deviance? Estimates = Test Parameters N Half Factor 19 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
20 mynls() : A less temperamental nls() Parameter Estimates Calculate Deviance Calculate Direction Calculate Test Parameters =Estimates + Factor * Direction Calculate New Deviance Reduced Deviance? Estimates = Test Parameters This cannot be calculated from unrealistic parameter estimates. tau.model() fails to fit N Half Factor 20 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
21 mynls() : A less temperamental nls() Parameter Estimates Calculate Deviance Calculate Direction Calculate Test Parameters =Estimates + Factor * Direction Calculate New Deviance Calculated & Reduced Deviance? Estimates = Test Parameters N Extra error check prevents crashing when iterative algorithm steps too far Half Factor 21 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
22 Starting Parameters Good starting parameters from fitting marginal distributions (e.g. monotherapies) and direct calculations In some situations, this can be done exactly, so nls() converges immediately to the starting parameters, but with standard errors added Starting from multiple starting points decrease risks of local minima Identify and fix parameters likely to shoot off to infinity beforehand 22 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
23 Summary Early identification of synergistic drug combinations of strategic importance within the pharmaceutical industry Powerful and flexible methodology for identifying and characterising synergy R provides a powerful environment for fitting and visualising these models Careful programming increases the of robustness and success rate of R in fitting these models 23 Chris Harbron, Using R For Flexible Modelling Of Pre-Clinical Combination Studies, USE-R 2009
Design of preclinical combination studies
University of Manchester, UK Talk Outline 1 Preliminaries What is a drug combination? Data structures. Ray design 2 Combination index Sources of variability 3 Two drugs Analysis of data 4 Types of studies
More informationA Two-Stage Response Surface Approach to Modeling Drug Interaction
This article was downloaded by: [FDA Biosciences Library] On: 27 October 2012, At: 12:44 Publisher: Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office:
More informationDrug Combination Analysis
Drug Combination Analysis Gary D. Knott, Ph.D. Civilized Software, Inc. 12109 Heritage Park Circle Silver Spring MD 20906 USA Tel.: (301)-962-3711 email: csi@civilized.com URL: www.civilized.com abstract:
More informationAs mentioned in the introduction of the manuscript, isoboles are commonly used to analyze
Appendix 1: Review of Common Drug Interaction Models As mentioned in the introduction of the manuscript, isoboles are commonly used to analyze anesthetic drug interactions. Isoboles show dose combinations
More informationAn extrapolation framework to specify requirements for drug development in children
An framework to specify requirements for drug development in children Martin Posch joint work with Gerald Hlavin Franz König Christoph Male Peter Bauer Medical University of Vienna Clinical Trials in Small
More informationNIH Public Access Author Manuscript Front Biosci (Elite Ed). Author manuscript; available in PMC 2010 November 5.
NIH Public Access Author Manuscript Published in final edited form as: Front Biosci (Elite Ed). ; 2: 582 601. E max model and interaction index for assessing drug interaction in combination studies J.
More informationFondamenti di Chimica Farmaceutica. Computer Chemistry in Drug Research: Introduction
Fondamenti di Chimica Farmaceutica Computer Chemistry in Drug Research: Introduction Introduction Introduction Introduction Computer Chemistry in Drug Design Drug Discovery: Target identification Lead
More informationUtilizing IMRT Intensity Map Complexity Measures in Segmentation Algorithms. Multileaf Collimator (MLC) IMRT: Beamlet Intensity Matrices
Radiation Teletherapy Goals Utilizing IMRT Intensity Map Complexity Measures in Segmentation Algorithms Kelly Sorensen August 20, 2005 Supported with NSF Grant DMI-0400294 High Level Goals: Achieve prescribed
More informationExperimental Designs for Drug Combination Studies
Experimental Designs for Drug Combination Studies B. Almohaimeed & A. N. Donev First version: 1 October 2011 Research Report No. 8, 2011, Probability and Statistics Group School of Mathematics, The University
More informationChapter Six: Two Independent Samples Methods 1/51
Chapter Six: Two Independent Samples Methods 1/51 6.3 Methods Related To Differences Between Proportions 2/51 Test For A Difference Between Proportions:Introduction Suppose a sampling distribution were
More informationSociety for Biomolecular Screening 10th Annual Conference, Orlando, FL, September 11-15, 2004
Society for Biomolecular Screening 10th Annual Conference, Orlando, FL, September 11-15, 2004 Advanced Methods in Dose-Response Screening of Enzyme Inhibitors Petr uzmič, Ph.D. Bioin, Ltd. TOPICS: 1. Fitting
More informationExpression Data Exploration: Association, Patterns, Factors & Regression Modelling
Expression Data Exploration: Association, Patterns, Factors & Regression Modelling Exploring gene expression data Scale factors, median chip correlation on gene subsets for crude data quality investigation
More informationType I error rate control in adaptive designs for confirmatory clinical trials with treatment selection at interim
Type I error rate control in adaptive designs for confirmatory clinical trials with treatment selection at interim Frank Bretz Statistical Methodology, Novartis Joint work with Martin Posch (Medical University
More informationStatistical Methods and Experimental Design for Inference Regarding Dose and/or Interaction Thresholds Along a Fixed-Ratio Ray
Virginia Commonwealth University VCU Scholars Compass Theses and Dissertations Graduate School 2006 Statistical Methods and Experimental Design for Inference Regarding Dose and/or Interaction Thresholds
More informationClinical Trials. Olli Saarela. September 18, Dalla Lana School of Public Health University of Toronto.
Introduction to Dalla Lana School of Public Health University of Toronto olli.saarela@utoronto.ca September 18, 2014 38-1 : a review 38-2 Evidence Ideal: to advance the knowledge-base of clinical medicine,
More informationFRAUNHOFER IME SCREENINGPORT
FRAUNHOFER IME SCREENINGPORT Design of screening projects General remarks Introduction Screening is done to identify new chemical substances against molecular mechanisms of a disease It is a question of
More informationConsumption. Consider a consumer with utility. v(c τ )e ρ(τ t) dτ.
Consumption Consider a consumer with utility v(c τ )e ρ(τ t) dτ. t He acts to maximize expected utility. Utility is increasing in consumption, v > 0, and concave, v < 0. 1 The utility from consumption
More informationCHL 5225H Advanced Statistical Methods for Clinical Trials: Multiplicity
CHL 5225H Advanced Statistical Methods for Clinical Trials: Multiplicity Prof. Kevin E. Thorpe Dept. of Public Health Sciences University of Toronto Objectives 1. Be able to distinguish among the various
More informationUniversity of Wollongong. Research Online
University of Wollongong Research Online Faculty of Engineering and Information Sciences - Papers: Part B Faculty of Engineering and Information Sciences 207 BIGL: Biochemically Intuitive Generalized Loewe
More informationDr. Sander B. Nabuurs. Computational Drug Discovery group Center for Molecular and Biomolecular Informatics Radboud University Medical Centre
Dr. Sander B. Nabuurs Computational Drug Discovery group Center for Molecular and Biomolecular Informatics Radboud University Medical Centre The road to new drugs. How to find new hits? High Throughput
More informationBayesian Inference on Joint Mixture Models for Survival-Longitudinal Data with Multiple Features. Yangxin Huang
Bayesian Inference on Joint Mixture Models for Survival-Longitudinal Data with Multiple Features Yangxin Huang Department of Epidemiology and Biostatistics, COPH, USF, Tampa, FL yhuang@health.usf.edu January
More informationMSc Drug Design. Module Structure: (15 credits each) Lectures and Tutorials Assessment: 50% coursework, 50% unseen examination.
Module Structure: (15 credits each) Lectures and Assessment: 50% coursework, 50% unseen examination. Module Title Module 1: Bioinformatics and structural biology as applied to drug design MEDC0075 In the
More informationEMPIRICAL VS. RATIONAL METHODS OF DISCOVERING NEW DRUGS
EMPIRICAL VS. RATIONAL METHODS OF DISCOVERING NEW DRUGS PETER GUND Pharmacopeia Inc., CN 5350 Princeton, NJ 08543, USA pgund@pharmacop.com Empirical and theoretical approaches to drug discovery have often
More informationSARA Pharm Solutions
SARA Pharm Solutions Who we are? Sara Pharm Solutions European Innovative R&D-based Solid state pharmaceutical CRO 2 Company Background Incorporated in Bucharest, Romania Contract Research Organization
More informationEarly Stages of Drug Discovery in the Pharmaceutical Industry
Early Stages of Drug Discovery in the Pharmaceutical Industry Daniel Seeliger / Jan Kriegl, Discovery Research, Boehringer Ingelheim September 29, 2016 Historical Drug Discovery From Accidential Discovery
More informationRetrieving hits through in silico screening and expert assessment M. N. Drwal a,b and R. Griffith a
Retrieving hits through in silico screening and expert assessment M.. Drwal a,b and R. Griffith a a: School of Medical Sciences/Pharmacology, USW, Sydney, Australia b: Charité Berlin, Germany Abstract:
More informationStatistics in medicine
Statistics in medicine Lecture 3: Bivariate association : Categorical variables Proportion in one group One group is measured one time: z test Use the z distribution as an approximation to the binomial
More informationCourse Plan for Pharmacy (Bachelor Program) No.: (2016/2017) Approved by Deans Council by decision (09/26/2016) dated (03/08/2016) )160) Credit Hours
Toward Excellence in AlZaytoonah University of Jordan Course for Bachelor program Course Development and Updating Procedures/ QF/47.E Course for Pharmacy (Bachelor Program) No.: (6/7) Approved by Deans
More informationEnquiry. Demonstration of Uniformity of Dosage Units using Large Sample Sizes. Proposal for a new general chapter in the European Pharmacopoeia
Enquiry Demonstration of Uniformity of Dosage Units using Large Sample Sizes Proposal for a new general chapter in the European Pharmacopoeia In order to take advantage of increased batch control offered
More informationGroup Sequential Trial with a Biomarker Subpopulation
Group Sequential Trial with a Biomarker Subpopulation Ting-Yu (Jeff) Chen, Jing Zhao, Linda Sun and Keaven Anderson ASA Biopharm Workshop, Sep 13th. 2018 1 Outline Motivation: Phase III PD-L1/PD-1 Monotherapy
More informationMedicinal Chemistry and Chemical Biology
Medicinal Chemistry and Chemical Biology Activities Drug Discovery Imaging Chemical Biology Computational Chemistry Natural Product Synthesis Current Staff Mike Waring Professor of Medicinal Chemistry
More informationLecture Unconstrained optimization. In this lecture we will study the unconstrained problem. minimize f(x), (2.1)
Lecture 2 In this lecture we will study the unconstrained problem minimize f(x), (2.1) where x R n. Optimality conditions aim to identify properties that potential minimizers need to satisfy in relation
More informationTo control the consistency and quality
Establishing Acceptance Criteria for Analytical Methods Knowing how method performance impacts out-of-specification rates may improve quality risk management and product knowledge. To control the consistency
More informationCombiTool - A New Computer Program for Analyzing Combination Experiments with Biologically Active Agents
Computers and Biomedical Research, in press CombiTool - A New Computer Program for Analyzing Combination Experiments with Biologically Active Agents VALESKA DREßLER, GERHARD MÜLLER, AND JÜRGEN SÜHNEL Biocomputing,
More informationWelcome! Webinar Biostatistics: sample size & power. Thursday, April 26, 12:30 1:30 pm (NDT)
. Welcome! Webinar Biostatistics: sample size & power Thursday, April 26, 12:30 1:30 pm (NDT) Get started now: Please check if your speakers are working and mute your audio. Please use the chat box to
More informationRandomized dose-escalation design for drug combination cancer trials with immunotherapy
Randomized dose-escalation design for drug combination cancer trials with immunotherapy Pavel Mozgunov, Thomas Jaki, Xavier Paoletti Medical and Pharmaceutical Statistics Research Unit, Department of Mathematics
More informationIsotope Production for Nuclear Medicine
Isotope Production for Nuclear Medicine Eva Birnbaum Isotope Program Manager February 26 th, 2016 LA-UR-16-21119 Isotopes for Nuclear Medicine More than 20 million nuclear medicine procedures are performed
More informationPractical APLIS-based Structured/Synoptic Reporting
Practical APLIS-based Structured/Synoptic Reporting Friday, August 18, 2006 David L.Booker, MD Anil Parwani, MD., PhD Synoptic Reporting Workshop: Goals In this workshop, we will describe our experience
More informationHandling Human Interpreted Analytical Data. Workflows for Pharmaceutical R&D. Presented by Peter Russell
Handling Human Interpreted Analytical Data Workflows for Pharmaceutical R&D Presented by Peter Russell 2011 Survey 88% of R&D organizations lack adequate systems to automatically collect data for reporting,
More informationThe Bcl3 Story : Collabora2ve Drug Discovery In Ac2on
The Bcl3 Story : Collabora2ve Drug Discovery In Ac2on Dr Andrew Westwell Drug Development & Model Systems Package Lead Dr Luke Piggo> Research Associate, WCRC Rachel Savery Trials Project Manager (Early
More informationSCI Career Options Seminar My Career in the Pharmaceutical Industry. Gareth Ensor, AstraZeneca University of York 14 th November 2012
SCI Career Options Seminar My Career in the Pharmaceutical Industry Gareth Ensor, AstraZeneca University of York 14 th November 2012 Gareth Ensor Career Profile Graduated with MChem Chemistry (2:1) from
More informationChristian Hellwig 1 Sebastian Kohls 2 Laura Veldkamp 3. May 2012
Christian Hellwig 1 Sebastian Kohls 2 Laura 3 1 Toulouse 2 Northwestern 3 NYU May 2012 Motivation Why include information choice in a model? is not observable theories untestable. choice links observables
More informationLiang Li, PhD. MD Anderson
Liang Li, PhD Biostatistics @ MD Anderson Behavioral Science Workshop, October 13, 2014 The Multiphase Optimization Strategy (MOST) An increasingly popular research strategy to develop behavioral interventions
More informationPubH 7405: REGRESSION ANALYSIS INTRODUCTION TO LOGISTIC REGRESSION
PubH 745: REGRESSION ANALYSIS INTRODUCTION TO LOGISTIC REGRESSION Let Y be the Dependent Variable Y taking on values and, and: π Pr(Y) Y is said to have the Bernouilli distribution (Binomial with n ).
More informationwhy open access publication of stability date is essential Mark Santillo Regional QA Officer SW England
why open access publication of stability date is essential Mark Santillo Regional QA Officer SW England } Standards for stability testing and data interpretation } Considerations for small molecule antimicrobials
More informationSUPPORTING A THRIVING UK LIFE SCIENCES ECOSYSTEM
SUPPORTING A THRIVING UK LIFE SCIENCES ECOSYSTEM ABOUT THE AMERICAN PHARMACEUTICAL GROUP THE AMERICAN PHARMACEUTICAL GROUP REPRESENTS THE TEN LARGEST US RESEARCH- BASED BIO-PHARMACEUTICAL COMPANIES WITH
More informationPolymer-Caged Nanobins for Synergistic Cisplatin-Doxorubicin Combination Chemotherapy
S1 Polymer-Caged Nanobins for Synergistic Cisplatin-Doxorubicin Combination Chemotherapy Sang-Min Lee, Thomas V. O Halloran,* and SonBinh T. Nguyen* Department of Chemistry and the Center of Cancer Nanotechnology
More informationQuality control analytical methods- Switch from HPLC to UPLC
Quality control analytical methods- Switch from HPLC to UPLC Dr. Y. Padmavathi M.pharm,Ph.D. Outline of Talk Analytical techniques in QC Introduction to HPLC UPLC - Principles - Advantages of UPLC - Considerations
More informationSample size determination for a binary response in a superiority clinical trial using a hybrid classical and Bayesian procedure
Ciarleglio and Arendt Trials (2017) 18:83 DOI 10.1186/s13063-017-1791-0 METHODOLOGY Open Access Sample size determination for a binary response in a superiority clinical trial using a hybrid classical
More informationx. Figure 1: Examples of univariate Gaussian pdfs N (x; µ, σ 2 ).
.8.6 µ =, σ = 1 µ = 1, σ = 1 / µ =, σ =.. 3 1 1 3 x Figure 1: Examples of univariate Gaussian pdfs N (x; µ, σ ). The Gaussian distribution Probably the most-important distribution in all of statistics
More informationQuantitative Modeling of Operational Risk: Between g-and-h and EVT
: Between g-and-h and EVT Paul Embrechts Matthias Degen Dominik Lambrigger ETH Zurich (www.math.ethz.ch/ embrechts) Outline Basel II LDA g-and-h Aggregation Conclusion and References What is Basel II?
More informationSupport'Vector'Machines. Machine(Learning(Spring(2018 March(5(2018 Kasthuri Kannan
Support'Vector'Machines Machine(Learning(Spring(2018 March(5(2018 Kasthuri Kannan kasthuri.kannan@nyumc.org Overview Support Vector Machines for Classification Linear Discrimination Nonlinear Discrimination
More informationOrder-q stochastic processes. Bayesian nonparametric applications
Order-q dependent stochastic processes in Bayesian nonparametric applications Department of Statistics, ITAM, Mexico BNP 2015, Raleigh, NC, USA 25 June, 2015 Contents Order-1 process Application in survival
More informationA Flexible Class of Models for Data Arising from a thorough QT/QTc study
A Flexible Class of Models for Data Arising from a thorough QT/QTc study Suraj P. Anand and Sujit K. Ghosh Department of Statistics, North Carolina State University, Raleigh, North Carolina, USA Institute
More informationAnd the Bayesians and the frequentists shall lie down together...
And the Bayesians and the frequentists shall lie down together... Keith Winstein MIT CSAIL October 16, 2013 Axioms of Probability (1933) S: a finite set (the sample space) A: any subset of S (an event)
More informationComparing p s Dr. Don Edwards notes (slightly edited and augmented) The Odds for Success
Comparing p s Dr. Don Edwards notes (slightly edited and augmented) The Odds for Success When the experiment consists of a series of n independent trials, and each trial may end in either success or failure,
More informationA nonlinear equation is any equation of the form. f(x) = 0. A nonlinear equation can have any number of solutions (finite, countable, uncountable)
Nonlinear equations Definition A nonlinear equation is any equation of the form where f is a nonlinear function. Nonlinear equations x 2 + x + 1 = 0 (f : R R) f(x) = 0 (x cos y, 2y sin x) = (0, 0) (f :
More information6 Sample Size Calculations
6 Sample Size Calculations A major responsibility of a statistician: sample size calculation. Hypothesis Testing: compare treatment 1 (new treatment) to treatment 2 (standard treatment); Assume continuous
More informationThe Instability of Correlations: Measurement and the Implications for Market Risk
The Instability of Correlations: Measurement and the Implications for Market Risk Prof. Massimo Guidolin 20254 Advanced Quantitative Methods for Asset Pricing and Structuring Winter/Spring 2018 Threshold
More informationSafety considerations for Fusion Energy: From experimental facilities to Fusion Nuclear Science and beyond
Safety considerations for Fusion Energy: From experimental facilities to Fusion Nuclear Science and beyond 1st IAEA TM on the Safety, Design and Technology of Fusion Power Plants May 3, 2016 Susana Reyes,
More informationAPPROXIMATE SOLUTION OF A SYSTEM OF LINEAR EQUATIONS WITH RANDOM PERTURBATIONS
APPROXIMATE SOLUTION OF A SYSTEM OF LINEAR EQUATIONS WITH RANDOM PERTURBATIONS P. Date paresh.date@brunel.ac.uk Center for Analysis of Risk and Optimisation Modelling Applications, Department of Mathematical
More informationDose-response modeling with bivariate binary data under model uncertainty
Dose-response modeling with bivariate binary data under model uncertainty Bernhard Klingenberg 1 1 Department of Mathematics and Statistics, Williams College, Williamstown, MA, 01267 and Institute of Statistics,
More informationMermaid. The most sophisticated marine operations planning software available.
Mermaid The most sophisticated marine operations planning software available. Mojo Maritime / Marine economic risk management aid Mermaid : marine economic risk management aid The most sophisticated marine
More informationA Reliable Constrained Method for Identity Link Poisson Regression
A Reliable Constrained Method for Identity Link Poisson Regression Ian Marschner Macquarie University, Sydney Australasian Region of the International Biometrics Society, Taupo, NZ, Dec 2009. 1 / 16 Identity
More informationWHITE PAPER BENEFITS OF USING EXPERT FX RISK MANAGEMENT RESOURCES PREPARED BY ANDRE CILLIERS DIRECTOR AND CURRENCY RISK STRATEGIST AT TREASURYONE
WHITE PAPER BENEFITS OF USING EXPERT FX RISK MANAGEMENT RESOURCES EXCHANGE RATE RISK MANAGEMENT PREPARED BY ANDRE CILLIERS DIRECTOR AND CURRENCY RISK STRATEGIST AT TREASURYONE SEPTEMBER 2018 Introduction
More informationMembers of WS-3 Working Group
CTTI WS-3 Members of WS-3 Working Group Suzanne Gagnon (Icon Clinical Research) Heather Macy (Pfizer) Rachpal Malhotra (Bristol-Myers Squibb) Margaret McLaughlin (Pfizer) Greg Nadzan (Amgen) Sundeep Sethi
More informationSTATISTICS Relationships between variables: Correlation
STATISTICS 16 Relationships between variables: Correlation The gentleman pictured above is Sir Francis Galton. Galton invented the statistical concept of correlation and the use of the regression line.
More informationPrediction of New Observations
Statistic Seminar: 6 th talk ETHZ FS2010 Prediction of New Observations Martina Albers 12. April 2010 Papers: Welham (2004), Yiang (2007) 1 Content Introduction Prediction of Mixed Effects Prediction of
More informationSavannah State University New Programs and Curriculum Committee Summary Page Form I
Summary Page Form I 1. Submitting College: COST 2. Department(s) Generating The Proposal: Natural Sciences Choose an item. (if needed) 3. Proposal Title: Revised Chemistry Program Curriculum 4. Course
More informationModel Selection in Bayesian Survival Analysis for a Multi-country Cluster Randomized Trial
Model Selection in Bayesian Survival Analysis for a Multi-country Cluster Randomized Trial Jin Kyung Park International Vaccine Institute Min Woo Chae Seoul National University R. Leon Ochiai International
More informationSample Size Determination
Sample Size Determination 018 The number of subjects in a clinical study should always be large enough to provide a reliable answer to the question(s addressed. The sample size is usually determined by
More informationAir Quality Modelling under a Future Climate
Air Quality Modelling under a Future Climate Rachel McInnes Met Office Hadley Centre Quantifying the impact of air pollution on health - Fri 12th Sep 2014 Crown copyright Met Office Rachel.McInnes@metoffice.gov.uk
More informationPARAMETER UNCERTAINTY QUANTIFICATION USING SURROGATE MODELS APPLIED TO A SPATIAL MODEL OF YEAST MATING POLARIZATION
Ching-Shan Chou Department of Mathematics Ohio State University PARAMETER UNCERTAINTY QUANTIFICATION USING SURROGATE MODELS APPLIED TO A SPATIAL MODEL OF YEAST MATING POLARIZATION In systems biology, we
More informationProtein Quantitation II: Multiple Reaction Monitoring. Kelly Ruggles New York University
Protein Quantitation II: Multiple Reaction Monitoring Kelly Ruggles kelly@fenyolab.org New York University Traditional Affinity-based proteomics Use antibodies to quantify proteins Western Blot Immunohistochemistry
More informationMethod Validation Essentials, Limit of Blank, Limit of Detection and Limit of Quantitation
Method Validation Essentials, Limit of Blank, Limit of Detection and Limit of Quantitation Thomas A. Little PhD 3/14/2015 President Thomas A. Little Consulting 12401 N Wildflower Lane Highland, UT 84003
More informationNuclear Medicine RADIOPHARMACEUTICAL CHEMISTRY
Nuclear Medicine RADIOPHARMACEUTICAL CHEMISTRY An alpha particle consists of two protons and two neutrons Common alpha-particle emitters Radon-222 gas in the environment Uranium-234 and -238) in the environment
More informationIntercontinental journal of pharmaceutical Investigations and Research
Kranthi K K et al, ICJPIR 2017, 4(1), XXX-XXX Available online at ISSN: 2349-5448 Intercontinental journal of pharmaceutical Investigations and Research ICJPIR Volume 4 Issue 1 Jan Mar- 2017 Research Article
More informationHypothesis Testing, Power, Sample Size and Confidence Intervals (Part 2)
Hypothesis Testing, Power, Sample Size and Confidence Intervals (Part 2) B.H. Robbins Scholars Series June 23, 2010 1 / 29 Outline Z-test χ 2 -test Confidence Interval Sample size and power Relative effect
More informationSupporting the reconfiguration of primary care services: Strategic Health Asset Planning and Evaluation
Supporting the reconfiguration of primary care services: Strategic Health Asset Planning and Evaluation About SHAPE Strategic Health Asset Planning and Evaluation (SHAPE) is a web enabled, evidence based
More informationFE670 Algorithmic Trading Strategies. Stevens Institute of Technology
FE670 Algorithmic Trading Strategies Lecture 8. Robust Portfolio Optimization Steve Yang Stevens Institute of Technology 10/17/2013 Outline 1 Robust Mean-Variance Formulations 2 Uncertain in Expected Return
More informationSTA 4504/5503 Sample Exam 1 Spring 2011 Categorical Data Analysis. 1. Indicate whether each of the following is true (T) or false (F).
STA 4504/5503 Sample Exam 1 Spring 2011 Categorical Data Analysis 1. Indicate whether each of the following is true (T) or false (F). (a) T In 2 2 tables, statistical independence is equivalent to a population
More informationBIDIRECTIONAL COUPLING OF EARTH SYSTEM MODELS WITH SOCIAL SCIENCE MODELS: NEW MOTIVATIONS AND A PROPOSED PATH
rhgfdjhngngfmhgmghmghjmghfmf BIDIRECTIONAL COUPLING OF EARTH SYSTEM MODELS WITH SOCIAL SCIENCE MODELS: NEW MOTIVATIONS AND A PROPOSED PATH JOHN T. MURPHY Anthropologist/ Computational Social Scientist
More informationDesign and Synthesis of the Comprehensive Fragment Library
YOUR INNOVATIVE CHEMISTRY PARTNER IN DRUG DISCOVERY Design and Synthesis of the Comprehensive Fragment Library A 3D Enabled Library for Medicinal Chemistry Discovery Warren S Wade 1, Kuei-Lin Chang 1,
More informationEquivalence of random-effects and conditional likelihoods for matched case-control studies
Equivalence of random-effects and conditional likelihoods for matched case-control studies Ken Rice MRC Biostatistics Unit, Cambridge, UK January 8 th 4 Motivation Study of genetic c-erbb- exposure and
More informationRegulatory Considerations in the Licensing of a Mobile Backscatter X-ray Device used in Security Screening
Regulatory Considerations in the Licensing of a Mobile Backscatter X-ray Device used in Security Screening Jim Scott a* and Leon Railey a a Australian Radiation Protection and Nuclear Safety Agency, Regulatory
More informationTRAINING REAXYS MEDICINAL CHEMISTRY
TRAINING REAXYS MEDICINAL CHEMISTRY 1 SITUATION: DRUG DISCOVERY Knowledge survey Therapeutic target Known ligands Generate chemistry ideas Chemistry Check chemical feasibility ELN DBs In-house Analyze
More informationA Tiered Screen Protocol for the Discovery of Structurally Diverse HIV Integrase Inhibitors
A Tiered Screen Protocol for the Discovery of Structurally Diverse HIV Integrase Inhibitors Rajarshi Guha, Debojyoti Dutta, Ting Chen and David J. Wild School of Informatics Indiana University and Dept.
More informationNext Generation Computational Chemistry Tools to Predict Toxicity of CWAs
Next Generation Computational Chemistry Tools to Predict Toxicity of CWAs William (Bill) Welsh welshwj@umdnj.edu Prospective Funding by DTRA/JSTO-CBD CBIS Conference 1 A State-wide, Regional and National
More informationAcknowledgments xiii Preface xv. GIS Tutorial 1 Introducing GIS and health applications 1. What is GIS? 2
Acknowledgments xiii Preface xv GIS Tutorial 1 Introducing GIS and health applications 1 What is GIS? 2 Spatial data 2 Digital map infrastructure 4 Unique capabilities of GIS 5 Installing ArcView and the
More informationPairwise rank based likelihood for estimating the relationship between two homogeneous populations and their mixture proportion
Pairwise rank based likelihood for estimating the relationship between two homogeneous populations and their mixture proportion Glenn Heller and Jing Qin Department of Epidemiology and Biostatistics Memorial
More informationTranslating Methods from Pharma to Flavours & Fragrances
Translating Methods from Pharma to Flavours & Fragrances CINF 27: ACS National Meeting, New Orleans, LA - 18 th March 2018 Peter Hunt, Edmund Champness, Nicholas Foster, Tamsin Mansley & Matthew Segall
More informationAn Introduction to Causal Mediation Analysis. Xu Qin University of Chicago Presented at the Central Iowa R User Group Meetup Aug 10, 2016
An Introduction to Causal Mediation Analysis Xu Qin University of Chicago Presented at the Central Iowa R User Group Meetup Aug 10, 2016 1 Causality In the applications of statistics, many central questions
More informationWork plan & Methodology: HPLC Method Development
Work plan & Methodology: HPLC Method Development The HPLC analytical Method developed on the basis of it s chemical structure, Therapeutic category, Molecular weight formula, pka value of molecule, nature,
More informationLecture 7: Interaction Analysis. Summer Institute in Statistical Genetics 2017
Lecture 7: Interaction Analysis Timothy Thornton and Michael Wu Summer Institute in Statistical Genetics 2017 1 / 39 Lecture Outline Beyond main SNP effects Introduction to Concept of Statistical Interaction
More informationUniversal Learning Technology: Support Vector Machines
Special Issue on Information Utilizing Technologies for Value Creation Universal Learning Technology: Support Vector Machines By Vladimir VAPNIK* This paper describes the Support Vector Machine (SVM) technology,
More informationResults of a simulation of modeling and nonparametric methodology for count data (from patient diary) in drug studies
Results of a simulation of modeling and nonparametric methodology for count data (from patient diary) in drug studies Erhard Quebe-Fehling Workshop Stat. Methoden für korrelierte Daten Bochum 24-Nov-06
More informationSnowy Range Instruments
Overcoming Optical Focus Issues in Portable Raman Systems for Analysis of Pharmaceutical Drug Formulations Snowy Range Instruments, 628 Plaza Lane, Laramie, WY, 82070, ph: 307-460-2089, sales@wysri.com
More informationSplineLinear.doc 1 # 9 Last save: Saturday, 9. December 2006
SplineLinear.doc 1 # 9 Problem:... 2 Objective... 2 Reformulate... 2 Wording... 2 Simulating an example... 3 SPSS 13... 4 Substituting the indicator function... 4 SPSS-Syntax... 4 Remark... 4 Result...
More informationInformation Choice in Macroeconomics and Finance.
Information Choice in Macroeconomics and Finance. Laura Veldkamp New York University, Stern School of Business, CEPR and NBER Spring 2009 1 Veldkamp What information consumes is rather obvious: It consumes
More informationDynamic modeling and analysis of cancer cellular network motifs
SUPPLEMENTARY MATERIAL 1: Dynamic modeling and analysis of cancer cellular network motifs Mathieu Cloutier 1 and Edwin Wang 1,2* 1. Computational Chemistry and Bioinformatics Group, Biotechnology Research
More information