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Mason Lee
Mason Lee

0 Ev Mp4


The Clean Off-Road Equipment Voucher Incentive Project (CORE) is a $273 million voucher incentive project intended to encourage California off-road equipment users to purchase or lease currently commercialized zero-emission off-road equipment. This streamlined voucher incentive project helps offset the higher cost of zero-emission technology with a point-of-sale discount. There is no scrappage requirement, and additional funding is available for charging and fueling infrastructure and for equipment deployed in disadvantaged communities.




0 Ev mp4



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High-level ab initio calculations have been carried out to reexamine relative stability of bowl, cage, and ring isomers of C(20) and C(20)(-). The total electronic energies of the three isomers show different energy orderings, strongly depending on the hybrid functionals selected. It is found that among three popular hybrid density-functional (DF) methods B3LYP, B3PW91, PBE1PBE, and a new hybrid-meta-DF method TPSSKCIS, only the PBE1PBE method (with cc-pVTZ basis set) gives qualitatively correct energy ordering as that predicted from ab initio CCSD(T)/cc-pVDZ [CCSD(T)-coupled-cluster method including singles, doubles, and noniterative perturbative triples; cc-pVDZ-correlation consistent polarized valence double zeta] as well as from MP4(SDQ)/cc-pVTZ [MP4-fourth-order Moller-Plesset; cc-pVTZ-correlation consistent polarized valence triple zeta] calculations. Both CCSD(T) and MP4 calculations indicate that the bowl is most likely the global minimum of neutral C(20) isomers, followed by the fullerene cage and ring. For the anionic counterparts, the PBE1PBE calculation also agrees with MP4/cc-pVTZ calculation, both predicting that the bowl is still the lowest-energy structure of C(20)(-) at T=0 K, followed by the ring and the cage. In contrast, both B3LYP/cc-pVTZ and B3PW91/cc-pVTZ calculations predict that the ring is the lowest-energy structure of C(20)(-). Apparently, this good reliability in predicting the energy ordering renders the hybrid PBE method a leading choice for predicting relative stability among large-sized carbon clusters and other carbon nanostructures (e.g., finite-size carbon nanotubes, nano-onions, or nanohorns). The relative stabilities derived from total energy with Gibbs free-energy corrections demonstrate a changing ordering in which ring becomes more favorable for both C(20) and C(20)(-) at high temperatures. Finally, photoelectron spectra (PES) for the anionic C(20)(-) isomers have been computed. With binding energies up to 7 eV, the simulated PES show ample spectral features to distinguish the three competitive C(20)(-) isomers.


We pointout that other groups have also reported resonance effectsin SWCNT Raman spectroscopy in, for example, these intermediate-frequencyregions59 of pristine SWCNTs as well asresonance effects on the D mode.60 Thediscussions were focused on multiparticle processes in mixed-chiralitypristine samples59 and the nonlinear dependenceof the intensity of the D mode based on negative or positive detuningof the excitation frequency from the main excitonic transition.60 Each report was supplemented with simulationsbut lacked explicit excitonic effects necessary in the descriptionof excited electronic states in SWCNT systems. However, our resultsallow good comparison with each study for pristine intermediate modesand for the D mode resonance effects but yield a simpler interpretationfor the formation of these additional features. These topics willbe specifically discussed below.


(a) Pristine (black) and functionalized (red) (9,1) SWCNTresonantRaman spectra measured in experiments. Here, the resonance frequencywas introduced at 1.85 eV near the E22 band. (b) ResonantRaman spectra for varying amounts of surface functionalization ona (6,5) SWCNT with the laser frequency set to 1.96 eV near the E22 band, as well. Both spectra are normalized with respectto the G mode intensity. Panel a is reproduced from ref (2). Copyright 2022 SciencePublishing Group. Panel b is reproduced from ref (29). Copyright 2022 SpringerNature Publishing Group.


In this Letter, we discuss theoretical simulationsperformed onthe (9,1) SWCNT chirality to elucidate effects on simulated near-resonantRaman spectroscopy after functionalization using a perturbation ofthe electronic structure of the material. In this way, we identifyvibrational modes that can be interpreted as those stemming from thedefect by varying the frequency of the external Raman laser near theE11* transition.


(a andb) Pristine and ortho(++) aryl/aryl defected(9,1) SWCNT structures used in this work, respectively. (c) Definitionof the ortho(++) functionalization configuration(red) on the SWCNT surface with respect to the other five possible(two ortho and three para) localarrangements reported in previous works.4,24,30 Simulated absorption spectra for the (d) pristineand (e) defected (9,1) SWCNTs. The excitation energies were broadenedby a Gaussian distribution with widths of 0.05 and 0.1 eV for thepristine and defected cases, respectively, for the sake of visualclarity.


All geometries were optimized in the ground state electronicstateat the density functional theory (DFT) level using the B3LYP functionaland STO-3G basis. Similar functionals and basis sets have been previouslyshown to provide qualitatively accurate electronic structure energiesand excitonic localization properties of these systems.24,25,30,31,35 The lowest 150 singlet excited states werecomputed for each system at the minimum of the ground state potentialenergy surface using linear-response time-dependent DFT (TD-DFT) usingthe same functional and basis. The real-space projected transitiondensity was generated with the aid of the MultiWfn package.77


So I've put up this little test code modeling what's going on with the real version of what i have. In it I have set up 2 peer connections in the same file, each having a dedicated video element on the html. The problem is, when i start sharing the screen, the stream is not being shown on the other peer (peer2), which is the same problem I get in the real version of the code.


More details: The moment the two peers are connected (they've exchanged offer-answer's and ICE candidates) if you add a track on one end (peer1), the other end (peer2) is going to receive an event with the track in it if you've overriden the method ontrack of the peer2. You access the track as event.track. From that track you can create a MediaStream object by calling new MediaStream() and passing it an array of all tracks you want to base your stream on. That newly created stream can serve as the source for your video element, assign it with videoElement.srcObject = theMediaStream;.


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Ever heard of the McMurtry Spéirling single-seater electric fan car? If not, that changes today as the wild-looking electric racer has broken both the official and unofficial hillclimb records at the 2022 Goodwood Festival of Speed.


UK-based McMurtry Automotive has made motorsport history by setting a new all-time hillclimb record at Goodwood on Sunday and winning the event on its competition debut. Driven by former Formula One driver Max Chilton, the tiny EV completed the 1.16-mile (1.86-kilometer) course in a blistering 39.08 seconds, beating fierce competition in Sunday Shootout in front of 150,000 spectators.


The Spéirling broke both the previous official shootout record of 41.6 seconds, set by Nick Heidfeld in 1999 in the McLaren MP4/13 F1, and the unofficial outright record of 39.3 seconds set by Romain Dumas in 2019 in the all-electric Volkswagen ID.R.


Remarkably, the McMurtry Spéirling is the first fan car to compete in officially sanctioned motorsport since the 1978 Swedish Grand Prix; by winning the event, the EV maintained the 100% win rate for fan cars spanning 4 decades.


Compared to the demonstrator car that made its debut at the Goodwood Festival of Speed last year, the McMurtry Spéirling record-breaking car went through an intensive program of prototyping and testing. A lot of time was dedicated to the unique fan-powered downforce system, which enables it to generate more than double its own weight in downforce. Unlike conventional vehicles, the Spéirling's downforce is available at all speeds as it does not rely on airflow over the car. 041b061a72


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