Search for tag: "natural sciences"

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57:00 03. Alan Beyerchen, Kluge & Clausewitz 03. Alan Beyerchen, Kluge & Clausewitz	03. Alan Beyerchen, Kluge & Clausewitz criticism film editing natural sciences contemporary philosophy consciousness international relations journals concepts in physics science fiction themes planning battle theories of history reasoning linguistics technical communication death crime spirituality social philosophy sensory system semantics communication comprehensible military terminology pharmacology government computing terminology subjective experience rationality emotion materialism political culture social concepts political spectrum realist pacifism political philosophy vitalism constitutional law auxiliary sciences of history demography economic ideologies sociology of culture realism google force armies by country senescence intelligence culture jamming unsolved problems in neuroscience society physical objects measurement ghosts international law social sciences psychology activism mental structures research weapons religion clausewitz scientific terminology international philosophy of religion epistemological theories explosive weapons truth environmental science marketing statistical terminology possibility metatheory of science conceptions of self physiology dualism interaction language biology terminology metaphysics of science violence experience thing metaphysical theories logic military probability theory political science journals politics by issue considerations probability reconstructs philosophical logic community hearing naturalism (philosophy) aesthetics meaning (philosophy of language) aptitude writing decision theory research methods natural philosophy military officer fiction philosophy of law warrior code maintenance war data management social theories sociology index relationship english-language journals military ranks of singapore translation classical mechanics applied linguistics circumstances laws of war civilians in war science futurology value theories matter socialism underwater diving physics universe hippie movement history higher education security postmodernism mind internet slang imagination cognitive science politics continental philosophy technology caption complete blade weapons documents humanities nationalism peace reality german words and phrases socioeconomics thermodynamics biology social psychology marxism scientific method dispute resolution armies literature description philosophy post-structuralism types of organization international relations theory political science neuroscience law contingency fluid mechanics philosophers quarterly journals acoustics forms of government theology e-commerce academia military personnel representation critical theory police ranks statistical theory From jrp354 48 plays
59:59 14. Alexis Radisoglou, (Anti-)Realism for the… 14. Alexis Radisoglou, (Anti-)Realism for the Anthropocene	14. Alexis Radisoglou, (Anti-)Realism for the Anthropocene planetary performing arts natural sciences spoken word consciousness contemporary syntax symbols science fiction themes human evolution theories of history temporality reasoning geography idealism human behavior philosophical schools and traditions j.j. interesting theory of relativity resourcefulness environment human-derived fictional species sources of law political geography articulation differential topology semiotics environmental issues emotion geography terminology grammar poetics toyota vehicles debating disconnection existentialist concepts constitutional law art movements cybernetics sociology of culture clubs and societies sociological theories ecology force reference intelligence unsolved problems in neuroscience economies society cultural geography abstraction discourse analysis earth consensus reality human ecology social sciences medical terminology category dissertation psychology entertainment globalization terminology mental structures literary criticism interrogative words and phrases marketing political economy electronics epistemological theories justification anthropocene environmental science existentialism galaxies story syntactic categories latin alphabet pragmatics topology mechanical engineering question universe front-wheel-drive vehicles economics thing logic horticulture and gardening syntactic entities criticism political science terms political philosophy communication philosophical logic meaning (philosophy of language) philosophical movements fiction mass decision theory historiography symptoms instantiation management natural philosophy political modernism propositional calculus music stars differential geometry kinematics individualism sociology index relationship german writers virtue youth rights geology classical mechanics semantics commerce science futurology elections earth sciences youth matter structuralism modern art international trade economic anthropology property history aesthetics storytelling plasma physics postmodernism separation processes metals cognitive science lexical units politics continental philosophy education psychoanalysis caption complete territoriality autonomy democracy humanities nationalism musical trios government administration ideologies early species of homo social philosophy computer science theology social psychology postmodern theory elementary geometry surfaces literature algebra collaboration philosophy historical eras post-structuralism types of organization administrative divisions physical objects political science creativity sociolinguistics toxicology critical theory identity morality planet theories of aesthetics sociocultural evolution sedimentology forms of government cosmology e-commerce association of american universities literary theory academic administration narrative representation physics philosophy of physics neurological disorders From jrp354 129 plays
55:09 Lee2 Lee2	Lee2 summer natural sciences magnetic observational astronomy chemical elements solutions geometric shapes scattering thermodynamic entropy knowledge continuum mechanics systems theory metallurgy thermodynamics optical devices systems factor transformation physical chemistry nuclear physics pharmacology linear filters concepts in physics differential topology rotation hamiltonian rays scattering neutron related techniques magnet elementary geometry phases of matter magnetic ordering sociology of culture optics force atsic statistical mechanics energy philosophical terminology spin models crystallography particle physics surfaces hexagonal minerals quantum chemistry impurity dietary minerals atomic physics research experiment biology and pharmacology of chemical elements electronics statistical terminology elementary shapes magnetism imaging carbon drug delivery devices topology building materials chemical processes interaction natural resources geometry low energy transfer dimensionless numbers probability theory house types ray techniques considerations symmetry color communication community and uncertainty colloidal chemistry transition metals x-ray instrumentation temperature natural philosophy native element minerals quantum mechanics information science structure pi analytic geometry direction molecular biology volume glass heat transfer biomolecules classical mechanics condensed matter physics meteorology crystal solvents spectroscopy absorption and radiative transfer (optics) hippie movement mechanics aesthetics analytical chemistry metals theoretical physics surveying large intensity education caption complete information nearest neighbor energy transfer web colors darkness scientific method neutron quantum field theory anatomy types of organization liquids velocity covariance and correlation electromagnetism light crystals materials mass correlation electrical conductors resolution chemical engineering From James Overhiser 55 plays
01:01:15 Nakatsuji1.mp4 Nakatsuji1.mp4	Nakatsuji1.mp4 political science terms resistivity state functions natural sciences point money concepts in physics resistance metals election measure heads of state caption complete heat transfer temperature interesting people question system thermodynamics charge subject media formats superconductivity t.v. nation anthropology pressure reason political science russian president condition physical quantities geography terminology condensed matter physics freedom transition thing phases of matter constitutional law economic anthropology physics From James Overhiser 37 plays
49:03 01 - Course Introduction Session 1 01 - Course Introduction Session 1	01 - Course Introduction Session 1 2013-01-22 18:11:36+00 classical mechanics body diagram dynamical systems special relativity dynamic companies listed on nasdaq position concepts in physics building engineering videonote acceleration rotation blackboard internet slang systems theory aerodynamics illustration learning methods geometry diagrams systems science geography terminology free body packaging materials educational psychology dynamics solid mechanics particle dressage terminology ball games algebra motion energy numbers exponentials learning question universe direction class evaluation structural system chemistry structural engineering information science fluid mechanics mechanical engineering problem continuum mechanics mnemonics speed display technology initial condition velocity natural sciences engine technology system communication physiology equation philosophical terminology differential kinematics static film and video technology numerical software elementary mathematics educational technology spring 2013 conservation laws mechanics tribology analytic geometry advertising force materials approximation earth vector latin alphabet sociology index statics engineering caption complete rotational symmetry linear algebra thing mass geography windows software fluid dynamics team sports equal human behavior causal inference c.. vectors length elementary algebra paper products albert einstein From [email protected] 91 plays
57:56 CAM Colloquium: Guillaume Bal (Columbia) - Hybrid… CAM Colloquium: Guillaume Bal (Columbia) - Hybrid Inverse Problems in Medical Imaging	CAM Colloquium: Guillaume Bal (Columbia) - Hybrid Inverse Problems in Medical Imaging Friday, January 31, 2014 at 3:30pm Frank H. T. Rhodes Hall, 655 CAM Colloquium: Guillaume Bal (Columbia) - Hybrid Inverse Problems in Medical Imaging Several recent coupled-physics medical imaging… vision broadcasting m.r.i. group theory radio spectrum diffusion eng creativity papermaking high contrast imagination natural philosophy interaction classical mechanics mechanical vibrations color ultrasound applied and interdisciplinary physics acoustics linear operators in calculus physical sciences semantics natural sciences materials reconstruction electronics cognitive science condition forestry solution equations of physics statistical terminology question nuclear magnetic resonance purely optical light graphic design banking electromagnetism mechanics communication displacement meteorology spring 2014 mass photography differential calculus logical consequence concepts in physics particle physics quantum electrodynamics religion tissue partial differential equations photometry mental structures resolution latin alphabet vector calculus computer programming statistical theory greek alphabet mediasite interest organs syntactic entities functions and mappings mathematical objects differential topology electromagnetic radiation genetics contrast matter medical terminology computing terminology aesthetics anatomy reasoning vector field engineering logic basic financial concepts function reconstruct universe problem scattering measurement linear algebra on premise optics photon nuclear physics physical objects p.d. noise grammar mathematical analysis physical chemistry theory of relativity force hearing idealism kinematics high resolution philosophical terminology set theory business law information theory computer graphics direction low contrast image processing symbols continuum mechanics scientific method equation caption complete infinity r.p.g. From E. Cornelius 17 plays
54:56 CAM Colloquium: Hinke Osinga - Computing Global… CAM Colloquium: Hinke Osinga - Computing Global Invariant Manifolds: Techniques and Applications ,Version 2	CAM Colloquium: Hinke Osinga - Computing Global Invariant Manifolds: Techniques and Applications ,Version 2 Friday, October 24, 2014 at 3:30pm Global invariant manifolds play an important role in organizing the behavior of a dynamical system. Together with equilibria and periodic orbits, they form the… mechanical engineering computation algebra family evaluation building on premise system concepts in physics developmental psychology image processing research educational psychology data modeling females love start eng experiment interesting geometric topology systems science knowledge earthquake approximation transition mediasite sociology of culture geography aesthetics sex numerical analysis realization architectural elements mind social networking services equation childhood natural sciences solution elementary mathematics information theory conversation time series analysis anatomy topology mathematical analysis point emotion systems theory manifold picture problem solving communication perturbation information science personal life and uncertainty thing women interpersonal relationships dimension health geography terminology current specification languages cognitive science question earth force psychology fall 2014 concentration caption complete signal processing intelligence structural system integration analytic geometry philosophical terminology milliseconds medical terminology information trigonometry hinke osinga cornell cam colloquium From E. Cornelius 8 plays
56:36 CAM Colloquium - Raazesh Sainudiin: A Correlated… CAM Colloquium - Raazesh Sainudiin: A Correlated Site Percolation Model of a Viscoplastic Fluid	CAM Colloquium - Raazesh Sainudiin: A Correlated Site Percolation Model of a Viscoplastic Fluid information neighborhood x.. statistical theory geography interaction interpersonal relationships interpretation criminology personal life violence philosophy of mathematics thermodynamics symbols statistical terminology concepts in physics translation t.v. fluid mechanics set theory arithmetic criminal law communication probability crime earth decision theory color statistical inference legal professions approximation terrestrial planets atmospheric thermodynamics contemporary art distribution heat transfer fall 2014 data management geography terminology algebra entertainment security mediasite morality configuration information science functions and mappings means quality construction on premise pressure function percolation war transmission number scientific method thing buy medical documents computability theory microscopic understand landscape architecture ecology parameter orthography greek alphabet phenomenological optical spectrum emotion numerical analysis probability theory darkness energy amount of substance transition performing arts fluid dynamics natural sciences latin alphabet caption complete eng people mathematical objects neighbor artistic techniques environmental science equilibrium chemistry commandments real logical group theory judeo-christian topics raazesh sainudiin cornell cam colloquium From E. Cornelius 2 plays
01:07:19 Ezra's Round Table/Systems Seminar: Pamela… Ezra's Round Table/Systems Seminar: Pamela Sydelko (Argonne National Laboratory) - Systems-level Approaches to Complex Decision-making	Ezra's Round Table/Systems Seminar: Pamela Sydelko (Argonne National Laboratory) - Systems-level Approaches to Complex Decision-making Friday, November 22, 2013 at 12:00pm Frank H. T. Rhodes Hall, 253 Ezra's Round Table/Systems Seminar: Pamela Sydelko (Argonne National Laboratory) - Systems-level Approaches to Complex… laboratory e.p.a. understand cybernetics international relations theory social sciences social psychology distribution organizational behavior logistics methods in sociology system production and manufacturing environment natural resources national artificial intelligence complex systems theory mediasite operations research systems thinking sociocultural evolution group called behavior application programming interfaces futurology telecommunications caption complete problem philosophical terminology model laboratories science scientific modeling people retailing start thought human behavior commercial item transport and distribution and wholesaling climate change energy energy storage holism economic problems natural gas south china decision thing china sea systems science management environmental science systems energy development energy strategies project collaboration threshold temperatures political terminology organizational theory national security infrastructure eng systems theory marketing risk natural sciences security industry computer systems problem solving fall 2013 education transportation systems engineering systems analysis object-oriented programming languages psychology evolution thoroughbred racehorses supply chain management terms energy sources on premise condensed matter physics From E. Cornelius 20 plays
01:28:34 Ezra's Round Table/Systems Seminar: Norman… Ezra's Round Table/Systems Seminar: Norman Uphoff (Cornell) - The System of Rice Intensification (SRI) in Systems Perspective: Nested and Convergent Systems	Ezra's Round Table/Systems Seminar: Norman Uphoff (Cornell) - The System of Rice Intensification (SRI) in Systems Perspective: Nested and Convergent Systems Friday, October 25, 2013 at 12:00pm Frank H. T. Rhodes Hall, 253 Ezra's Round Table/Systems Seminar: Norman Uphoff (Cornell) - The System of Rice Intensification (SRI) in Systems Perspective:… discipline science organic chemistry on premise systems science titles in india climate change years school types commonwealth republics field sequenced genomes climatology social sciences natural sciences academic degrees condition eng plants microbiology cybernetics nirvana (band) songs educational stages musical quintets coolants countries of the indian ocean sri plant taxonomy fall 2013 microorganisms philosophical terminology subjects taught in medical school island countries plant scientist school terminology understand systems thinking socialist states water sociolinguistics difference mother goddesses member states of the united nations chemical elements member states of the commonwealth of nations farmer people atlantic records artists economic problems member states of the south asian association for regional cooperation systems theory matter root systems system hospitals times theories of history communication honorifics long time biomass si derived units physics square meter climate forcing agents tropical agriculture mediasite youth biology and pharmacology of chemical elements physical sciences agriculture noble titles pnictogens business models concepts in physics integrated development environments genetics dozen years republics g15 nations historiography euclidean geometry greenhouse gases point thing caption complete systems From E. Cornelius 8 plays
57:56 CAM Colloquium, 2014-01-31 - Guillaume Bal:… CAM Colloquium, 2014-01-31 - Guillaume Bal: High-contrast High-resolution Coupled Physics Imaging Modalities	CAM Colloquium, 2014-01-31 - Guillaume Bal: High-contrast High-resolution Coupled Physics Imaging Modalities ultrasound materials engineering radioactivity cam specification languages sound computer systems electromagnetic radiation symbols physical sciences systems science guillaume bal cornell p.d. mathematical objects natural sciences greek alphabet color interaction equations of physics vector calculus genetics image processing equation problem acoustics function communication control theory scientific method physical objects nuclear physics photometry caption complete idealism mechanics quantum electrodynamics sheer waste economic anthropology send light tissue information science metals imagination systems set theory seafood latin alphabet wireless linear operators in calculus evaluation personal life information theory statistical theory group theory logical consequence reasoning linear algebra mental structures religion polynomials forestry light statistical terminology interest hearing computing terminology u.t. m.r.i. high contrast medical terminology nuclear magnetic resonance meteorology light cone r.p.g elementary algebra natural resources measurement medical imaging organs mass determinants reconstruction photography banking partial differential equations condition structural system broadcasting health electronics occupational safety and health property computer programming algebra creativity computer graphics architectural elements optics particle physics knowledge representation low contrast reconstruct high resolution differential topology medical physics grammar inverse problem contrast vision food ingredients physics anatomy photon syntactic entities european space agency philosophy disambiguation continuum mechanics electromagnetism radio spectrum atomic physics universe value papermaking matter applied mathematics physical cosmology artificial satellites orbiting earth systems theory mathematical analysis force resolution business law accountancy scattering natural philosophy infinity applied and interdisciplinary physics existentialist concepts mechanical vibrations question aesthetics classical mechanics From E. Cornelius 9 plays
56:36 CAM Colloquium, 2014-10-10 - Raazesh Sainudiin: A… CAM Colloquium, 2014-10-10 - Raazesh Sainudiin: A Correlated Site Percolation Model of a Viscoplastic Fluid	CAM Colloquium, 2014-10-10 - Raazesh Sainudiin: A Correlated Site Percolation Model of a Viscoplastic Fluid classical mechanics particle physics distribution real logical heat transfer landscape architecture linear algebra configuration probability theory algebra systems theory phenomenological relationship human hair g.l. petroleum data management terrestrial planets geography terminology dielectrics group theory mathematical analysis colloidal chemistry statistical theory differential topology scientific method statistical inference construction understand means earth historical scientific instruments contemporary art cam energy thing materials science documents formal sciences philosophy of mathematics topology solutions time series analysis signal processing design of experiments x.. fluid mechanics oils latin alphabet microstructure systems philosophical terminology statistics research methods s.. cardiology communication environmental science market failure approximation interaction quality research packaging materials computer programming ecology viscosity neighboring set theory microeconomics function force fuels neighborhood volume physics auxiliary sciences of history translation differential equations geography physical objects greek alphabet theology applied mathematics fraction transition mechanics mathematical objects caption complete cornell artistic techniques alphabets metallurgy numerical analysis systems science dosage forms glass applications information human head and neck natural sciences data information science probability neighbor organs statistical terminology evaluation methods phases of matter raazesh sainudiin orthography elementary algebra statistical mechanics parameter computing terminology atmospheric thermodynamics matter thermodynamics fluid dynamics percolation toys pressure physical chemistry From E. Cornelius 3 plays
01:00:07 CAM Colloquium, 2015-10-16 - Hendrik Dijkstra:… CAM Colloquium, 2015-10-16 - Hendrik Dijkstra: Climate as a (Stochastic) Dynamical System	CAM Colloquium, 2015-10-16 - Hendrik Dijkstra: Climate as a (Stochastic) Dynamical System classical mechanics mechanical vibrations chemical engineering vector calculus geology cognitive science development north atlantic diffusion heat transfer control theory water ice analog circuits probability theory chaos theory semantics algebra time scale phenomenon climatology data management state functions globalization issues group theory weather war sea surface colloidal chemistry p.c. society plumbing statistical theory ice hydrology atmospheric dynamics scale separation biological systems concepts in physics scientific method logic chemical properties atlantic ocean bicontinental countries atmosphere mechanism home data analysis gulf stream materialism temperature web colors cybernetics trigonometry administrative divisions island countries length cam oxygen compounds theories of history geomorphology nuclear physics biology terminology beverages temperature variability cultural geography demography complex systems theory country subdivisions formal sciences continents process topology geodesy food ingredients solutions and air conditioning ventilating heating causality personhood fluid mechanics sociology of culture ocean phenomena heat flux linear operators in calculus model oceanography philosophical terminology pseudoscience research methods ecosystems communication women time series analysis elementary mathematics climate quality fluvial landforms digital signal processing research continuum mechanics electronics terminology computer programming ecology theories climate change economic problems variability climate history forms of water basic meteorological concepts and phenomena physical geography metrology dependent territories in north america convection measurement computer data force chemical elements science biological concepts differential calculus volume auxiliary sciences of history sociological theories geometry noise time series difference hydraulics glaciology surface temperature earth water design of experiments transport phenomena geometric topology statistics geography physical chemistry mental structures mechanics simulation statistical deviation and dispersion caption complete ocean currents bodies of water water streams climate system logical consequence culture cornell oceans earth sciences sociocultural evolution isotopes aquatic ecology dosage forms hendrik dijkstra color means system summary statistics covariance and correlation transport natural sciences meteorology fluid dynamics data ice ages evaluation methods mathematical sciences scale physical oceanography dynamic planetary science statistical mechanics dynamical systems coastal and oceanic landforms systems science international trade atmospheric thermodynamics chemical processes winds thermodynamics calorimetry systems theory sociology index metaphysical theories personal life From E. Cornelius 15 plays
57:15 CAM Colloquium, 2015-12-04 - Alan Hastings: Using… CAM Colloquium, 2015-12-04 - Alan Hastings: Using mathematics to conserve and sustain: tools for environmental management	CAM Colloquium, 2015-12-04 - Alan Hastings: Using mathematics to conserve and sustain: tools for environmental management probability theory culture incorporated cities and towns in california heat transfer paper products botany thing bodies of water food and drink theoretical computer science economic problem abstraction acidification biology characters created by jack kirby natural sciences computing terminology inorganic solvents contributions political culture alan hastings coastal and oceanic landforms environmental terminology macroeconomics formal sciences statistics earth cultural history prediction data analysis behavior social sciences and uncertainty cybernetics social institutions computer programming distribution social philosophy oscillations ecology terminology information science control theory years information illustration human geography population ecology law city business accountancy auxiliary sciences of history interesting systems science thermodynamics biology terminology understanding botanical nomenclature costs plants time series analysis statistical deviation and dispersion statistical theory biological systems challenges decision theory fisheries concepts in physics predation geography geochemistry types of organization cognitive science population ecology california plant reproduction cornell coral reefs caption complete international trade politics by issue administrative divisions people communication communication design management political science terms microeconomics demography coastal geography quality iraq war logic semantics cartography ecosystems population genetics estimation theory science human behavior time series scientific method commerce data operations research government nuclear reactor coolants sociology index photography theories of history humanities plant taxonomy statistical terminology policy question dynamic evolution country subdivisions aspect control risk flora scientific classification model sociology of culture environment data management environmental science economics systems theory political philosophy philosophical terminology algae algorithms system cultural geography cam aquatic ecology oceanography carbon reefs probability understand livestock graphic design knowledge From E. Cornelius 11 plays
54:56 CAM Colloquium 2014-10-24 - Hinke Osinga:… CAM Colloquium 2014-10-24 - Hinke Osinga: Computing Global Invariant Models - Techniques and Applications	CAM Colloquium 2014-10-24 - Hinke Osinga: Computing Global Invariant Models - Techniques and Applications developmental psychology computer science image processing mechanical engineering solution transition mathematical analysis hearing construction human behavior geometric topology binary operations length real estate approximation composite materials center for applied math question theoretical computer science psychology industry arts engineering perturbation linear algebra concrete sociology of culture elementary mathematics concentration intelligence structural system cornell numerical analysis electricity problem elementary geometry classical mechanics physics system structure cognitive science sound equation philosophical terminology human geography chemical elements kinematics picture caption complete aesthetics acoustics production and manufacturing family thing computation stable anatomy systems dimensional manifold pedagogy particle physics electric current behavioral concepts building materials elementary algebra differential topology natural sciences hinke osinga learning types of organization pharmacology experiment topology systems science audio engineering signal processing algebra integration cam bifurcation geometry post-processing time series analysis mechanics educational psychology milliseconds architectural elements sociological terminology condition potential metals communication dynamical systems human spaceflight trigonometry oscillation differential equations economic geography earthquake point building equations identity neuroscience earthquake engineering systems theory vector calculus From E. Cornelius 48 plays
51:20 13 - Future directions and closing remarks 13 - Future directions and closing remarks	13 - Future directions and closing remarks Corinna E. Loeckenhoff, Cornell University October 3, 2013 The conference aimed to close the gap between two burgeoning fields of research at the intersection of aging, emotion, and health. On the… computer science spirituality happiness communication theory thermodynamics question learning sociolinguistics love social concepts biology density functional theory legal terms buddhism phenomenology and uncertainty difference social psychology sociological theories political science terms individual government sustainability technical factors of astrology process theory personhood social sciences social institutions interpersonal relationships legal documents neuroscience management school terminology language aging life satisfaction classical mechanics pragmatics social groups thing developmental psychology communication personality interventionist systems engineering caption complete family study death pharmacology social philosophy public services history gerontology international trade aesthetics identity education logic decision theory design medicine meditation urban studies and planning intervention psychology systems logical consequence organs information science control theory operationalize volunteerism age difference medical terminology social networking services measurement mediasite project management sociology index linguistics process health care emotional regulation bit longer age groups thinking forms of government tool-using species reasoning family law skills community building demography society state functions relationship philosophy anatomy childhood healthcare quality clinical psychology psychiatric diagnosis memory information topology financial institutions law of obligations philosophical terminology semantics political culture personal development pseudoscience motivation law business regulation economics of uncertainty strategy people actuarial science health contract law resource universities and colleges psychometrics physiology social ethics cognitive science school types landscape architecture libertarian theory experience giving planning commerce psychiatry arts knowledge research statistical terminology human behavior documents systems theory pedagogy evaluation sociology of culture theoretical computer science demographics sources of law political terminology psychological theories medical statistics behavioural sciences sensory system scientific method neuropsychology systems science nursing concepts in physics ethology brain cognitive psychology pain rural geography research methods neurological disorders complex systems theory epidemiology adolescence youth context metrology emotion addiction risk biology terminology natural sciences cybernetics consciousness ecology From Marshall Perryman 121 plays