Prifysgol Bangor
From vision to touch : the cortical and behavioural effects of viewing others in pain
Adams, W. (Awdur), Tipper, S. (Goruchwylydd), Ion 2012Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
From volcanic ash to allophanic dust : : understanding phosphorous behaviour in Dominican soils
Casimir, A.-M. (Awdur), Brook, R. (Goruchwylydd), Ion 2015Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Fuel, feed and fibre: consequential life cycle assessment of novel miscanthus value chains
Yesufu, J. (Awdur), Styles, D. (Goruchwylydd) & Gibbons, J. (Goruchwylydd), 28 Mai 2019Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Full circle : employee engagement in the Welsh public service
Jones, N. (Awdur), Sambrook, S. (Goruchwylydd) & Doloriert, C. (Goruchwylydd), Ion 2012Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Function of cancer associated protein translin
Al-Shehri, Z. (Awdur), Mcfarlane, R. (Goruchwylydd), Ion 2012Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Functional analyses of reading and short-term memory in dyslexic children.
Ellis, N. C. (Awdur), Ebr 1980Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Functional analysis of the cancer-associated proteins Translin and Trax reveal a novel function in genome stability control
Alahmadi, H. A. S. (Awdur), Mcfarlane, R. (Goruchwylydd), 6 Gorff 2020Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Functional characterisation of SPO11 in human cancer cells
Althobaiti, F. (Awdur), Mcfarlane, R. (Goruchwylydd), Ion 2017Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Functional characterisation of Schizosaccharomyces pombe meiotic linear elements
Dafydd, H. F. (Awdur), 2011Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Functional ecology of the southern stingray, Dasyatis Americana
Tilley, A. (Awdur), Turner, J. (Goruchwylydd), Ion 2011Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Functional integration of neural signals during person perception
Greven, I. (Awdur), Ramsey, R. (Goruchwylydd) & Downing, P. (Goruchwylydd), Ion 2016Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Functional landscape connectivity models in applied conservation: spatio-temporal variability, on-ground validation and application for African elephants (Loxodonta africana)
Osipova, L. (Awdur), Hayward, M. (Goruchwylydd) & Balkenhol, N. (Goruchwylydd), 17 Meh 2019Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Functional magnetic resonance imaging investigations of visuo-motor action-specific representations
Oosterhof, N. N. (Awdur), Downing, P. (Goruchwylydd), 2011Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Functional molecular wires and devices
Wierzchowiec, P. (Awdur), Ashwell, G. (Goruchwylydd), 2008Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Functional molecular wires from self-assembled films
Williams, A. T. (Awdur), Ashwell, G. (Goruchwylydd), 2012Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Funds transfer pricing and performance evaluation
Quan, L. (Awdur), Hodgkinson, L. (Goruchwylydd), Ion 2009Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Færwhile & the Multimodal Creative Practice: Composing Fiction from Analogue to Digital
Skains, R. (Awdur), Ensslin, A. (Goruchwylydd), 2013Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Færwhile & the Multimodal Creative Practice: Composing Fiction from Analogue to Digital
Skains, L. (Awdur), Ensslin, A. (Goruchwylydd), 21 Ion 2014Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Gaining insight into caregiving experiences and motivations
Williams, K. L. (Awdur), Morrison, V. (Goruchwylydd) & Robinson, C. (Goruchwylydd), 2011Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Gait Analysis in Autism: A Potential Diagnostic Tool
Forster, K. (Awdur), Wimpory, D. (Goruchwylydd), 2013Traethawd ymchwil myfyriwr: Graddau Meistr trwy Ymchwil
Gas-sensitive resistors for detection of nitroaromatics
Jones, B. J. S. (Awdur), Kalaji, M. (Goruchwylydd), 2004Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Gender Differences and ASD: Exploring Professionals’ Perspectives
Edwards, B. A. (Awdur), Kyffin, F. (Goruchwylydd), 2018Traethawd ymchwil myfyriwr: Graddau Meistr trwy Ymchwil
Gene expression, exchange and distribution of salicylate 1-hydroxylase genes in Acinetobacter species
Kay, C. M. (Awdur), Williams, P. (Goruchwylydd), Medi 2005Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Generating carbon credits through application of the enzymic latch mechanism in peatland carbon sequestration
Dunn, C. (Awdur), Freeman, C. (Goruchwylydd), 17 Ion 2014Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Generative Music from Fuzzy Logic and Probability: A Portfolio of Electroacoustic Compositions
Garrett, R. (Awdur), Lewis, A. (Goruchwylydd), Ebr 2017Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Generic Juxtapositioning in Malory's Morte D'Arthur
Whetter, K. S. (Awdur), 29 Chwef 2000Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genetic analysis of production, fertility and health traits of dairy cows.
Pirzada, R. H. (Awdur), Ap Dewi, I. (Goruchwylydd), Medi 2001Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genetic and environmental factors in the migration of the African armyworm moth, Spodoptera exempta (Walker) (Lepidoptera :Noctuidae).
Woodrow, K. P. (Awdur), Medi 1987Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genetic and phenotypic variation in two marine bryozoans.
Goldson, A. J. (Awdur), Medi 1998Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genetic aspects of Mytilus edulis in relation to spawning and hatchery culture
del Rio Portilla, M. A. (Awdur), Beaumont, A. (Goruchwylydd), Mai 1996Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genetic aspects of a small scale honeybee breeding program
Williams, I. (Awdur), Malhotra, A. (Goruchwylydd), 6 Rhag 2013Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genetic dissection of neurocognitive phenotypes : implications for psychopathological susceptibility
Lancaster, T. (Awdur), Linden, D. (Goruchwylydd), Ion 2012Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genetic diversity study in landraces of rice (Oryza sativa L.) by agro-morphological characters and microsatellite DNA markers
Bajracharya, J. (Awdur), 2003Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genetic influences on emotion/cognition interactions : from synaptic regulation to individual differences in working memory for emotional faces
Wolf, C. (Awdur), 2008Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genetic linkage mapping in the blue mussel Mytilus edulis and the European flat oyster Ostrea edulis, and the search for quantitative trait loci of resistance to a disease in O. edulis
Lallias, D. (Awdur), Ebr 2007Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genetic resources and selection methods for drought and salinity resistance in durum wheat
Pecetti, L. (Awdur), Maw 1994Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genetic variation in field emergence and related traits in naked and covered spring barley
Keerio, M. (Awdur), Brook, R. (Goruchwylydd), Ion 2012Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genetic variation of Castanea sativa Mill
Buck, E. J. (Awdur), Cahalan, C. (Goruchwylydd), Maw 2006Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genetic variation of juglans regia L.
Thakur, A. (Awdur), Maw 2006Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
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Genome-wide analysis of topoisomerase removal after campothecin treatment in the context of replication and transcription
Ashour Garrido, K. (Awdur), Hartsuiker, E. (Goruchwylydd), 30 Meh 2015Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genomic Tools for Conservation and Management of Manta and Devil Rays (Mobula Spp.)
Hosegood, J. (Awdur), Carvalho, G. (Goruchwylydd), Creer, S. (Goruchwylydd), Ogden, R. (Goruchwylydd) & De Bruyn, M. (Goruchwylydd), 25 Chwef 2020Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genomic analysis of bacterial species associated with Acute Oak Decline
Doonan, J. (Awdur), McDonald, J. (Goruchwylydd) & Golyshin, P. (Goruchwylydd), Ion 2016Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genomic analysis of shifts in life history traits in the Trinidadian guppy, Poecilia reticulata
Perry, H. (Awdur), Carvalho, G. (Goruchwylydd) & Taylor, M. (Goruchwylydd), Ion 2015Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Genotype, environment and disease resistance in hill sheep
Pritchard, T. C. (Awdur), Cahalan, C. (Goruchwylydd) & Ap Dewi, I. (Goruchwylydd), 2006Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
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Genotype-phenotype analysis of the checkpoint kinase MEC1, the budding yeast homologue of human ATM/ ATR
Waskiewicz, E. (Awdur), Cha, R. (Goruchwylydd), Ion 2017Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Geochemical and mineralogical studies of the weathering of Silurian argillaceous rocks
Chapman, P. (Awdur), Medi 1986Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Geophysical evaluation of the geotechnical properties of Quaternary sediments fron the continental margin, northwest of the UK
Finlayson, K. A. (Awdur), Rhag 1999Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Geophysical properties of surficial sediments : textural and biological controls.
Jones, S. E. (Awdur), Jago, C. (Goruchwylydd), Hyd 1990Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Geophysical/sedimentological studies of a Quaternary tidal delta system
Solangi, S. H. (Awdur), Ion 1992Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
George Herbert Mead and dualism
Roman, J. (Awdur), Ion 1988Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Girard Contests Nietzsche: A case of Misplaced Resentment - Dionysos and the Crucified
Blaskow, N. (Awdur), Huskinson, L. (Goruchwylydd) & Cowdell, S. (Goruchwylydd), 15 Chwef 2022Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Giving molecular cavity wall extensions (and other topology changes) to pseudo [M7] (M = Co, Ni and Zn) metallocalix[n]arenes (n = 4, 6)
Slater-Parry, M. (Awdur), Jones, L. (Goruchwylydd), 29 Mai 2024Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Glacial sculpting and post-glacial drowning of the Celtic Sea
Lockhart, E. A. (Awdur), Van Landeghem, K. (Goruchwylydd) & Scourse, J. (Goruchwylydd), 17 Chwef 2020Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Global interactions : an international perspective : a portfolio of compositions
Johnston, O. (Awdur), Lewis, G. (Goruchwylydd), Ion 2004Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Glycinebetaine accumulation in cotton
Shafi, Y. (Awdur), Gorham, J. (Goruchwylydd), Maw 2002Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Goal perceptions and their effects on commitment and affective responses to goals
Wray, J. (Awdur), Ingledew, D. (Goruchwylydd), 2001Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Goal-orientations, intrinsic motivation & adherence to regular physical activity
Markland, D. (Awdur), Hardy, L. (Goruchwylydd), 1993Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Goal-setting : a psychological skill and an individual difference factor.
Kingston, K. M. (Awdur), Ion 2000Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Graduate employment among Chinese graduates from UK universities: a case study of Bangor University
Zhang, S. (Awdur), Dobbins, T. (Goruchwylydd) & Sambrook, S. (Goruchwylydd), Awst 2018Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Grammar-based preprocessing for PPM compression and classification
Aljehane, N. O. M. (Awdur), Teahan, W. (Goruchwylydd), 2018Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Graphs of groups: word computations and free crossed resolutions
Moore, E. J. (Awdur), Brown, R. (Goruchwylydd), 2001Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Grasping the nettle: Understanding hospital discharge : a constructivist inquiry
Williams, S. (Awdur), Ion 2001Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Greenhouse gas flux response to restoration management in UK lowland peatlands
Brown, E. (Awdur), Evans, C. (Goruchwylydd), Smith, A. (Goruchwylydd) & Jones, D. L. (Goruchwylydd), Ion 2017Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Ground level ozone and wheat: an exploration of effects on yield, interactions with nitrogen, and potential sources of sensitivity and tolerance
Brewster, C. (Awdur), Hayes, F. (Goruchwylydd) & Fenner, N. (Goruchwylydd), 1 Meh 2023Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Group counselling/therapy as a technique to modify the undesirable school behaviour (school phobia) of children at elementary school level in the state of Kuwait
Sahel, R. A. (Awdur), Ebr 1989Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Group interventions for adults with ASD
Cernyw, E. (Awdur), Henderson, B. (Goruchwylydd) & Griffith, G. (Goruchwylydd), 19 Chwef 2015Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Growing Kind Minds: Adapted group Compassion Focused Therapy for Adults with Intellectual Disabilities (CFT-ID)
Clapton, N. (Awdur), Williams, J. (Goruchwylydd), Ion 2016Traethawd ymchwil myfyriwr: Doethuriaethau Proffesiynol
Growth and characterisation of functional molecular wires
Barnes, S. A. (Awdur), Ashwell, G. (Goruchwylydd), 2012Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Growth and inter-specific interactions in young silvopastoral systems with native timber trees in the dry tropics of Costa Rica
Castaneda, H. J. A. (Awdur), Brook, R. (Goruchwylydd), Maw 2007Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Growth and physiology of spring wheat under saline conditions.
Iqbal, R. M. (Awdur), Ion 1992Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Growth and survival of Penaeus monodon (Fabricius) larvae and postlarvae on natural and artificial diets.
Amjad, S. (Awdur), Mai 1990Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Growth of Urtica urens in elevated CO₂
Marriott, D. (Awdur), Farrar, J. (Goruchwylydd), Maw 1999Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Guanidine glycomimetics
Jones, I. V. (Awdur), Murphy, P. (Goruchwylydd), 2012Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Gum Arabic studies in Tanzania: Production, utilization and economic potentials.
Makonda, F. B. S. (Awdur), Bright, G. (Goruchwylydd), Tach 2003Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Gwaith barddonol Ieuan ap Gruffudd Leiaf, Robert Leiaf, Syr Siôn Leiaf a Rhys Goch Glyndyfrdwy
Taylor, J. (Awdur), Lynch, P. (Goruchwylydd), Ion 2014Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Gwerthusiad o gyfraniad cwrs B.Add. mewn-swydd y Coleg Normal i ddatblygiad proffesiynol athrawon
Ellis, R. T. (Awdur), 1990Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
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Gwleidyddiaeth, genynnau a disgyblaeth - Creu ar y ffin
Elis, M. (Awdur), Price, A. (Goruchwylydd), Ion 2016Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Habitat Modelling of the Amur Leopard and Siberian Tiger for Future Reintroduction. Using Conservation Priority Setting, Ecological Corridors and Carrying Capacities
Gardener, B. (Awdur), Winder, I. (Goruchwylydd), 1 Meh 2020Traethawd ymchwil myfyriwr: Graddau Meistr trwy Ymchwil
Habitat Selection of a Non-Native Snake: Implications for Future Management of Zamenis longissimus in Colwyn Bay, North Wales
Alkins, D. (Awdur), Wuster, W. (Goruchwylydd), 9 Awst 2021Traethawd ymchwil myfyriwr: Graddau Meistr trwy Ymchwil
Habitat selection during movement pathways in the Aesculapian snake (Zamenis longissimus (Laurenti, 1768)) in its introduced range in Colwyn Bay, North Wales.
Jeffrey, L. (Awdur), Wuster, W. (Goruchwylydd), 4 Meh 2024Traethawd ymchwil myfyriwr: Graddau Meistr trwy Ymchwil
Haemanthamine, zephycandidine and quorum sensing N-Acyl homoserine lactones
Tibble-Howlings, J. (Awdur), Murphy, P. (Goruchwylydd), 30 Medi 2021Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Hanes Geiriaduraeth yng Nghymru o 1547 hyd 1914 : gyda sylw arbennig i ddylanwad John Walters a William Owen Pughe ar eiriadurwyr 1805-1850
Morgan, M. E. (Awdur), Ion 2002Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Hanes y Degwm yng Nghymru yn ystod y Bedwaredd Ganrif ar Bymtheg, gyda sylw arbennig i ‘Ryfel y Degwm’.
Jones, S. (Awdur), Rees, L. (Goruchwylydd), Ion 2017Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Have stripe patterns influenced the social behaviour and cohesion of the plains zebra (Equus quagga)?
Smith, D. (Awdur), Shannon, G. (Goruchwylydd) & Hayward, M. (Goruchwylydd), 24 Awst 2020Traethawd ymchwil myfyriwr: Graddau Meistr trwy Ymchwil
Health Economics and Motor Neurone Disease: Evidence for health technology assessments
Moore, A. (Awdur), Hughes, D. (Goruchwylydd), 15 Tach 2021Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Health related behaviour, stress and well-being during organisational change.
Ingledew, D. K. (Awdur), Meh 1994Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Health service users' help-seeking decisions in primary healthcare: A health psychology approach
Davies, G. (Awdur), Fazey, D. (Goruchwylydd), Ion 2009Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Hemispheric asymmetries: behavioural, kinematic, and electrophysiological predictors of cerebral organisation
Johnstone, L. (Awdur), Carey, D. (Goruchwylydd), Ion 2016Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Henry Parry Liddon : correspondence on church and faith.
Orford, B. A. (Awdur), Ion 2000Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Henry VIII's court in the 1510s and 1520s
Samman, N. (Awdur), Ion 1989Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Here Be Dragons - Taxonomic Bias in Upper Palaeolithic Cave Paintings
Northfield, A. (Awdur), Winder, I. (Goruchwylydd) & Shaw, V. (Goruchwylydd), 27 Chwef 2022Traethawd ymchwil myfyriwr: Graddau Meistr trwy Ymchwil
Herrschaft in Gallien: Studien zur Entwicklung der Keltischen Herrschaftsfroment im Vorromischen Gallien
Mueller, H. (Awdur), Waddington, K. (Goruchwylydd), Ion 2012Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Heterogeneity of Endothelial Dysfunction and the Role of Nutritional Therapy
Jones, T. (Awdur), Macdonald, J. (Goruchwylydd) & Rossetti, G. (Goruchwylydd), 13 Maw 2021Traethawd ymchwil myfyriwr: Meistr mewn Athroniaeth
High Burnup Fragmentation in Uranium Oxide Fuels for Light Water Reactors
Dixon, L. (Awdur), Rushton, M. (Goruchwylydd), Middleburgh, S. (Goruchwylydd) & Atkinson, K. (Goruchwylydd), 6 Chwef 2024Traethawd ymchwil myfyriwr: Graddau Meistr trwy Ymchwil
High Entropy Alloys and Their Desirability For Novel First Wall Materials In Fusion Applications
Lin-Vines, A. (Awdur), Middleburgh, S. (Goruchwylydd), 6 Meh 2022Traethawd ymchwil myfyriwr: Graddau Meistr trwy Ymchwil
High Voltage Nanosecond Pulsed Electric Field (nsPEF) Electroporation Systems
Davies, I. (Awdur), Hancock, C. (Goruchwylydd) & Palego, C. (Goruchwylydd), 20 Maw 2023Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
High capacity optical fibre transmission systems.
Blank, L. C. (Awdur), Ion 1992Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
High value products from unused, indigenous plants
Preskett, D. (Awdur), Medi 2007Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
High-resolution three-dimensional ecosystem mapping of temperate reef systems
Jackson-Bue, T. (Awdur), Williams, G. (Goruchwylydd) & King, J. (Goruchwylydd), 31 Mai 2022Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth
Higher Dimensional Algebroids and Crossed Complexes
Mosa, G. H. (Awdur), Tach 1986Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth