forced vibrations and resonance

... Forced Oscillations and Resonance it The phenomenon of driving a system with a frequency equal to its natural frequency is called resonance A system being driven ... frequency f0 of the ball on the rubber band, then a resonance is achieved, and the amplitude of the ball’s oscillations increases dramatically At higher and lower driving frequencies, energy is ... of a system at resonance The diaphragm and chest wall drive the oscillations of the chest cavity which result in the lungs inflating and deflating The system is critically damped and the muscular...

Ngày tải lên: 31/10/2017, 00:00

... are converted to electrical vibrations, then to sound vibrations, and finally to vibrations of our eardrums Chapter Vibrations Dandelion Cello Read those two words, and your brain instantly conjures ... texts, and no back-cover texts ISBN 0-9704670-3-6 To Diz and Bird Brief Contents Vibrations 13 Resonance 25 Free Waves 47 Bounded Waves 75 Contents Vibrations 1.1 Period, Frequency, and Amplitude ... 56 3.3 Sound and Light Waves Resonance 58 Sound waves, 58.—Light waves, 59 2.1 Energy in Vibrations 26 2.2 Energy Lost From Vibrations 29 2.3 Putting Energy Into Vibrations ...

Ngày tải lên: 19/01/2014, 14:34

... Vibrations and Waves The Light and Matter series of introductory physics textbooks: Newtonian Physics Conservation Laws Vibrations and Waves Electricity and Magnetism Optics ... Magnetism Optics The Modern Revolution in Physics Vibrations and Waves Benjamin Crowell www.lightandmatter.com Light and Matter Fullerton, California www.lightandmatter.com © 1999-2002 by Benjamin Crowell ... to electrical vibrations, then to sound vibrations, and finally to vibrations of our eardrums Vibrations Dandelion Cello Read those two words, and your brain instantly conjures a stream of associations,...

Ngày tải lên: 24/04/2014, 16:53

... waves in a gas and a solid, voltage and current waves on a transmission line and electromagnetic waves in a dielectric and a conductor All are amenable to this common treatment, and it is the ... Chapter The Forced Oscillatior The vector operator i (53) Electrical and mechanical impedance (56) Transient and steady state behaviour of a forced oscillator (58) Variation of displacement and velocity ... sin !t ỵ  ị and the path followed by the particle is formed by eliminating the time t from these equations to leave an expression involving only x and y and the constants  and  Expanding the...

Ngày tải lên: 24/04/2014, 17:22

... baseline and following bronchoconstriction from both techniques using a single cohort of mice and a single system More specifically, negative pressure-driven forced expiratory (NPFE) and forced ... respiratory system elastance; FEF50: forced expiratory flow at 50% of forced vital capacity; FEV0.1: forced expired volume over 0.1 second; FVC: forced vital capacity; FOT: forced oscillation technique; ... curves from ovalbumin-sensitized and sham-challenged mice (A) and ovalbumin-sensitized and challenged mice (B) at varying negative pressures Values are mean ± standard deviation from groups of...

Ngày tải lên: 12/08/2014, 11:22

... B, U0 and the values of η at various temperatures are given in Tables 1, and Our calculated results for the lattice constant a and the molar heat capacities CVvib , CVrot , CV for β−N2 and β−CO ... direction z and kz , τ1 , τ2 and τ3 also are the parameters of crystal The lattice constant on direction z is determined by c = c0 + uz0 ,where c0 is the distance c at temperature 0K and is determined ... W F Giauque and J O Clayton, J Amer Chem Soc 55, 12, 4875 (1933) [2] M.I Bagatskii, V A Kucheryavy, V G Manzhelii and V A, Popov, Phys Status Solidi 26, 453 (1968) [3] J O Clayton and W F Giauque,...

Ngày tải lên: 31/10/2015, 10:41

... Education (1994) [6] N Q Hoc and N Tang, Commun Phys (1994), 65 [7] N Q Hoc and T Q Dat, Proc.Natl.Conf Theor Phys 35 (2010) 228 and Journal of Research on Military Technology and Science 11 (2011) ... [5, 6] and by self-consistent field method (SCFM) in [9] In [7], the low temperature heat capacity at constant volume of the molecular crystals of type N2 is studied by combining the SMM and the ... and the SCFM This paper represents further investigations of anharmonic effects of lattice vibrations and molecular rotations on other thermodynamic properties (such as the free energy, the energy,...

Ngày tải lên: 31/10/2015, 10:44

... are converted to electrical vibrations, then to sound vibrations, and finally to vibrations of our eardrums Chapter Vibrations Dandelion Cello Read those two words, and your brain instantly conjures ... texts, and no back-cover texts ISBN 0-9704670-3-6 To Diz and Bird Brief Contents Vibrations 13 Resonance 25 Free Waves 47 Bounded Waves 73 Contents Vibrations 1.1 Period, Frequency, and Amplitude ... (optional), 56 3.3 Sound and Light Waves 57 Sound waves, 57.—Light waves, 58 Resonance 2.1 Energy in Vibrations 2.2 Energy Lost From Vibrations 2.3 Putting Energy Into Vibrations 2.4 Proofs...

Ngày tải lên: 18/03/2016, 01:07

... Babich and Anufriev [41], De Corte and Simonits [42], Gryntakis et al [43], Wyrich and Poenitz [45], Sims and Juhnke [49], and Cabell [50] On the other hand, the measurements reported by Kurosawa and ... Babich and Anufriev [41] De Corte and Simonits [42] Gryntakis et al [43] Mughabghab [44] Wyrich and Poenitz [45] Kurosawa and Shimizu [46] Heft [47] Gleason [48] De Soete et al [9] Fabry and Jacquemin ... cross-section at Eres), t is the foil thickness, and C is the total resonance width (C = Cc + Cn, where Cc and Cn are resonance widths for (n,c) and (n,n0 ) reactions) The correction factor for...

Ngày tải lên: 16/12/2017, 15:05

... both summer and winter conditions: air permeability to reduce heat dispersion in winter and guarantee passive cooling effect by combining convective and heat transport between the outer and inner ... of ventilated faỗade and its capacity for cooling These quantities are mathematically modeled by CFD techniques CFD is used to quantify and compare the effect of natural and forced ventilation ... initial air temperature and velocity set Consequently, the height limit where the initial forced air has no thermal effect depends on the initial forced air temperature and velocity ISSN 2076-2895...

Ngày tải lên: 05/09/2013, 14:58

... of interaction between magnetic resonance imaging and the copper-T380A IUD Contraception 1997;55:169–73 543 [13] Zieman M, Kanal E Copper T 380A IUD and magnetic resonance imaging Contraception ... endometrial mucosa and the myometrium), if we employ a low-frequency signal; and the myometrium, using a medium- intensity signal IUDs must be correctly placed inside the uterine cavity and are visualized ... or implants Material and methods The authors researched in PubMed-Medline/Ovid using the following keywords: Magnetic Resonance Imaging, Intrauterine Devices, Implanon® and Essure® This article...

Ngày tải lên: 13/02/2014, 07:20

... ferredoxins, Fd1 and Fd2, from this bacterium are considered to serve as low-potential electron donors for this key reaction [8] POR is distributed among archaea, bacteria and anaerobic protozoa, and is ... are phylogenetically related and the heterotetrameric enzyme has been proposed to be the common ancestor that underwent gene rearrangement and fusion to generate homo- and heterodimeric ORs [9,13,15] ... [POR and 2-oxoglutarate: ferredoxin oxidoreductase (OGOR; 2-oxoglutarate synthase, EC 1.2.7.3)] in H thermophilus and its close relatives [16,17]; in these organisms, the heteropentameric POR and...

Ngày tải lên: 16/02/2014, 09:20

... the Nterminal amino acids of subunits O and P, subunits O and Q and subunits O and R are shown (B–D) FLIM analysis of the interaction between cerulean–GAPDH and citrine–GAPDH in living CHO-K1 cells ... Subcellular localization and enzymatic activities of GAPDH– citrine and PGK–cerulean (A) Expression of GAPDH–citrine and PGK–cerulean Localization of endogenous GAPDH and PGK in HeLa cells was ... in Figs 1A and S1A, transiently expressed GAPDH–citrine (chimeric protein with N-terminal GAPDH and C-terminal citrine) and citrine–GAPDH (chimeric protein with N-terminal citrine and C-terminal...

Ngày tải lên: 16/02/2014, 09:20

... between donor and acceptor dyes, will therefore unveil the status of physical union and separation of complementary strands during renaturation and strand exchange, respectively, and thereby assesses ... renaturation (A) and strand exchange (B) reactions mediated by OsDmc1 protein Phi-C and Phi-W represent rhodamine and fluorescein carrying strands, respectively, at their 3¢ and 5¢ ends The assays ... was shown to catalyze the strand exchange and strand assimilation in a homology dependent manner [12] Recent studies on hDmc1 showed that it was able to mediate the strand exchange reaction at least...

Ngày tải lên: 19/02/2014, 07:20

... Anti-gp120 Ig and anti-FLAG Ig identified bands corresponding to proteins with a molecular mass equivalent to  43 kDa and 85 kDa for D2L and  39 kDa and 80 kDa for D2S (Fig 1) No bands were detected ... expression of HIV- and FLAG-tagged D2L and D2S receptors in Sf9 cells To achieve this, mAbs directed against gp120 (clone 11/4C) and the FLAG sequence were used, and Fig shows the band pattern visualized ... the dopamine D2L and D2S receptors can form constitutive homo- and hetero-oligomers in two expression systems (Sf9 and HEK293 cells) and these are not regulated by receptor ligands Our study applied,...

Ngày tải lên: 21/02/2014, 00:20

... IPL3 ị in which IP and IPLn are the intensities of a free protein and different protein–ligand complexes summed over the charge states and the isotopic distributions The free ligand concentration ... I, TRX II and CTX xylanases In such cases, the binding constant, Ka, can be expressed as Ka ẳ ẵPL ẵPẵL 1ị in which [PL] is the concentration of the protein–ligand complex, and [P] and [L] are ... TRX II and CTX using high-field ESI FT-ICR MS and X-ray crystallography Results and Discussion ESI FT-ICR analyses Figure presents typical 9.4 T ESI FT-ICR mass spectra of TRX I, TRX II and CTX...

Ngày tải lên: 07/03/2014, 17:20

... of factor X and its Gla-containing fragments to membranes containing 25 mol% PtdSer in the presence of 10 mM Ca2+ obtained by evaluation of association and dissociation phases (I) and equilibrium ... titration curves of factor X and Gla– EGFN binding indicate cooperative binding (Fig 1) Halfmaximal binding occurred at a calcium concentration of 1.5 and 1.4 mM for factor X and Gla–EGFN, respectively, ... agreement between observed and calculated sensorgrams Models with two on-rates and two off-rates improved the fit significantly Moreover, a model including a conformational change and a model including...

Ngày tải lên: 08/03/2014, 23:20

... spectral overlap between the donor emission and the acceptor absorption spectra, and the donor and acceptor groups must be the right distance apart and properly oriented [18] Therefore 9,11,13,15-cis,trans,trans,cis-octadecatetraenoic ... concentration Data from Fig Fig FRET between TLL (and its mutants) and cis-PnA in the presence and absence of NaTDC The protein concentration was 0.8 lM and the cis-PnA concentration was varied stepwise ... stereoview of OA binding modes in molecule A and B (OA_A and OA_B, respectively, thick lines); C9 and C10 correspond to the position of these atoms in the OA_A ligand, where the electron density was visible...

Ngày tải lên: 08/03/2014, 23:20

... 2B and Table 2) We expressed donor and acceptor proteins in the pairs pVHL30-cerulean and elongin C-citrine, cerulean-pVHL30 and citrine-elongin C, and cerulean-pVHL30 and elongin C-citrine, and ... combinations: cerulean-elongin B and citrineelongin C; cerulean-elongin B and elongin C-citrine; elongin B-cerulean and elongin C-citrine; and elongin B-cerulean and citrine-elongin C Transfected ... encoding: (C) cerulean-elongin B and elongin Ccitrine; (D) elongin B-cerulean and elongin C-citrine; (E) ceruleanelongin B and citrine-elongin C; and (F) elongin B-cerulean and citrine-elongin C The...

Ngày tải lên: 16/03/2014, 05:20

... receptor ligand assay (CARLA) [12] and scintillation proximity assay (SPA) [13], have been used to measure the binding constants for ligand–PPARc interactions and in screening of ligands By employing ... to ligands (Eur J Biochem 271) 391 Table The equilibrium constant and Tm for the PPARc–LBD and the compounds complex The equilibrium constants (KDs) and Tm values were obtained by Biacore and CD ... receptor and ligands The majority of binding sites of PPARc is lipophilic, and the lipophilicity of the ligands is also very high, so a hydrophobic effect must play a key role in receptor–ligand binding...

Ngày tải lên: 16/03/2014, 16:20