0000000000388868

AUTHOR

David Thomas

showing 4 related works from this author

Estimation of power supply harmonic impedance using a controlled voltage disturbance

2002

A novel method for power system impedance estimation is presented. The method employs a power converter to inject a voltage transient onto the supply system. The impedance is estimated through correlation of the measured voltage and current transients. Simulations and experimental results demonstrate the effectiveness of this measurement technique.

High impedanceMaterials scienceSwitched-mode power supplyElectronic engineeringImpedance bridgingOutput impedanceHardware_PERFORMANCEANDRELIABILITYVoltage sourceVoltage optimisationDisturbance voltageNegative impedance converter2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230)
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A Technique for Power Supply Harmonic Impedance Estimation Using a Controlled Voltage Disturbance

2002

A method for power system impedance estimation is presented. The method employs a power converter to inject a voltage transient onto the supply system. As the technique employs controlled power electronic devices it may be used as a stand alone piece of a portable measurement equipment, or it may be embedded into the functions of an active shunt filter for improved harmonic control. The impedance is estimated through correlation of the measured voltage and current transients. Simulations and experimental results demonstrate the measurement technique is highly accurate and effective.

Engineeringindustrial power systemsSwitched-mode power supplybusiness.industryImpedance measurementImpedance bridgingHardware_PERFORMANCEANDRELIABILITYVoltage optimisationpower qualityElectric power systempower system measurements.Power electronicsElectronic engineeringVoltage sourceElectrical and Electronic EngineeringbusinessActive filterNegative impedance converter
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Characterization of the Clinical and Immunologic Phenotype and Management of 157 Individuals with 56 Distinct Heterozygous NFKB1 Mutations

2020

Contains fulltext : 229571.pdf (Publisher’s version ) (Closed access) BACKGROUND: An increasing number of NFKB1 variants are being identified in patients with heterogeneous immunologic phenotypes. OBJECTIVE: To characterize the clinical and cellular phenotype as well as the management of patients with heterozygous NFKB1 mutations. METHODS: In a worldwide collaborative effort, we evaluated 231 individuals harboring 105 distinct heterozygous NFKB1 variants. To provide evidence for pathogenicity, each variant was assessed in silico; in addition, 32 variants were assessed by functional in vitro testing of nuclear factor of kappa light polypeptide gene enhancer in B cells (NF-κB) signaling. RESU…

0301 basic medicineMaleNF-KAPPA-BMedizinlnfectious Diseases and Global Health Radboud Institute for Molecular Life Sciences [Radboudumc 4]Fluorescent Antibody TechniqueAutoimmunityDiseaseNUCLEAR-FACTORKaplan-Meier Estimatemedicine.disease_causeHypogammaglobulinemia0302 clinical medicineNFKB1 variants and mutations; autosomal dominant inheritance; common variable immunodeficiency; reduced penetrance; variable expressivityHDE PEDImmunology and Allergyvariants and mutationsNF-κB1-related phenotypeImmunodeficiencyIMMUNODEFICIENCY*NF-?B1-related phenotypeNFKB1 variants and mutations1184 Genetics developmental biology physiologycommon variable immunodeficiencyDisease ManagementMiddle AgedNF-kappa B1-related phenotypereduced penetrancePrognosisPenetranceImmunohistochemistryMagnetic Resonance Imaging3. Good healthPhenotypeNFKB1 variant*NFKB1 variant*common variable immunodeficiencyFemaleHaploinsufficiency*reduced penetranceNFKB1 mutationAdultHeterozygote*NFKB1 mutationImmunologyHAPLOINSUFFICIENCYArticle03 medical and health sciencesvariable expressivityautosomal dominantmedicineHumansGenetic Predisposition to DiseaseGenetic Association StudiesAgedbusiness.industryCommon variable immunodeficiencyNF-kappa B p50 SubunitNF-KAPPA-B1Immune dysregulationmedicine.diseaseautosomal dominant inheritance030104 developmental biologyBiological Variation PopulationImmunologyCELLSMutation*autosomal dominantPrimary immunodeficiency3111 BiomedicinebusinessTomography X-Ray ComputedBiomarkers030215 immunology
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Analysis of Heritability and Shared Heritability Based on Genome-Wide Association Studies for Thirteen Cancer Types

2015

BACKGROUND: Studies of related individuals have consistently demonstrated notable familial aggregation of cancer. We aim to estimate the heritability and genetic correlation attributable to the additive effects of common single-nucleotide polymorphisms (SNPs) for cancer at 13 anatomical sites.METHODS: Between 2007 and 2014, the US National Cancer Institute has generated data from genome-wide association studies (GWAS) for 49 492 cancer case patients and 34 131 control patients. We apply novel mixed model methodology (GCTA) to this GWAS data to estimate the heritability of individual cancers, as well as the proportion of heritability attributable to cigarette smoking in smoking-related cance…

MaleCancer ResearchLung NeoplasmsLymphomaGenome-wide association studyPolymorphism (computer science)NeoplasmsMedicineChronicGeneticsOsteosarcomaOncology And CarcinogenesisLeukemiaSmokingFamily aggregationSingle NucleotideMiddle AgedFamilial riskDiffuseKidney NeoplasmsLymphocyticOncologyAdult; Aged; Asian Continental Ancestry Group; Bone Neoplasms; European Continental Ancestry Group; Female; Humans; Kidney Neoplasms; Leukemia Lymphocytic Chronic B-Cell; Lung Neoplasms; Lymphoma Large B-Cell Diffuse; Male; Middle Aged; Neoplasms; Osteosarcoma; Polymorphism Single Nucleotide; Smoking; Testicular Neoplasms; Tissue Array Analysis; Urinary Bladder Neoplasms; Genetic Predisposition to Disease; Genome-Wide Association StudyFemaleLymphoma Large B-Cell DiffuseAdultAsian Continental Ancestry GroupEuropean Continental Ancestry Group/Bone NeoplasmsPolymorphism Single NucleotideGenetic correlationTesticular NeoplasmsLarge B-CellHumansGenetic Predisposition to DiseaseOncology & CarcinogenesisPolymorphismAgedbusiness.industryExtramuralB-CellCancerHeritabilityGenome-wide association studies for thirteen cancer typesmedicine.diseaseLeukemia Lymphocytic Chronic B-CellUrinary Bladder NeoplasmsTissue Array AnalysisbusinessGenome-Wide Association StudyJournal of the National Cancer Institute
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