Skeleton-based action recognition has attracted considerable attention due to its compact representation of the human body’s skeletal structure. Many recent methods have achieved remarkable performance using graph convoluitional networks (GCNs) and convolutional neural networks (CNNs), which extract spatial and temporal features, respectively. Although spatial and temporal dependencies in the human skeleton have been explored separately, spatio-temporal dependency is rarely considered.

Learners discover how important their thumbs are by attempting various tasks without them. After tying up their thumbs, learners attempt to legibly write their names or play catch with a tennis ball. Use this activity to emphasize how important parts are to help an entire system function. When learners set up a free account at Kinetic City, they can answer bonus questions at the end of the activity as a quick assessment. As a larger assessment, learners can complete the Bug Blaster game after they've completed several activities.

In this online activity, learners role-play as medics, treating a patient with missing organs. Learners select different organs, then drag them into the proper location in the patient's body. System by system, they put the patient back together. When learners set up a free account at Kinetic City, they can answer bonus questions at the end of the activity as a quick assessment. As a larger assessment, learners can complete the Smart Attack game after they've completed several activities.

A 14-membered cyclic compound (3) containing amide, amino, and carbamate groups, which was serendipitously obtained in the oily residue after the separation of 4-benzyl-1,4,7,10-tetraazacyldododecane-2,6-dione (2a) and 4,16-dibenzyl-1,4,7,10,13,16,19,22-octaazacyclo-tetracosane-2,6,14,18-tetraone (2b), is reported. The structure of 3 is formally a CO2 insertion between positions 3 and 4 of the 12-membered ring in 2a. The CO2 insertion was confirmed in the synthesis of diethyl 2,2′-(benzylazanediyl)diacetate (1) by the reaction of benzylamine with ethyl bromoacetate using K2CO3 as the base. In addition, the selective synthesis of 3 and ethyl N-benzyl-N-((2-ethoxy-2-oxoethoxy)carbonyl)glycinate (5) and their kinetic behavior are reported. The reaction of 5 with triethylenetetramine afforded a 17-membered macrocycle (7), which was obtained in an 18% yield. Compounds 6 and 8 were prepared from 3 and 7 by introducing benzyl groups to improve their solubility in organic solvents. Titration experiments using 1H NMR showed that both 6 and 8 exhibit Li+ selectivity.

This dataset contains fluid inclusion hydrogen (δ2H) and oxygen (δ18O) isotope compositions from cold-water coral skeletons, collected from Holocene and last glacial period deposits in Angola and Iceland. The data were obtained through comparative measurements using cavity ringdown spectroscopy (CRDS) and isotope ratio mass spectrometry (IRMS) techniques. The dataset includes results from coral skeletons processed at various temperatures (with a focus on 120°C), highlighting the influence of kinetic isotope fractionation on the isotopic compositions during coral crushing.

In Global EV Regenerative Braking System Market, Adgero and Skeleton Technologies is a significant industry player, created the Kinetic Energy and Recovery System (KERS) regenerative braking technology.

Described herein is the enantioselective synthesis of multisubstituted biaryl derivatives by chiral phosphoric acid catalyzed asymmetric bromination. Two asymmetric reactions (desymmetrization and kinetic resolution) proceeded successively to afford chiral biaryls in excellent enantioselectivities (up to 99% ee). Both experimental and computational studies suggested that this excellent selectivity could be achieved via a highly organized hydrogen bond network among a substrate, a catalyst (chiral phosphoric acid), and a brominating reagent (N-bromophthalimide).

The fluorescence intensity of phosphorus corroles increases upon meso-aryl C–F/C–H and P–OH/P–F substitutions, the latter affects corrole-centered redox processes more than C–H/C–F substitution on the corrole’s skeleton, and the presence of F atoms allows for the first experimental insight into the electronic structures of oxidized corroles. Experimental and theoretical methodologies reveal that mono- but not bis-chlorosulfonation of the corrole skeleton is under kinetic control. Selective introduction of heavy atoms leads to complexes that are phosphorescent at room temperature.

To capitalize on developments in voice and gesture control, we must identify a framework by which reliable control interfaces can be developed before these technologies will be taken seriously for application in spaceflight or commercial industry. Previous projects have successfully generated prototype interfaces for concept demonstration purposes but fall short of fully characterizing the available technologies and systematically identifying intuitive voice/gesture 'vocabularies' and design principles which will be necessary for flight applications. This project will leverage from previous projects but will establish a foundation (vocabularies, design principles, technology baseline and framework) from which serious integrated solutions to human interface needs can be built. Our goal is to develop a number of prototype interfaces with specific applications that would lead to specific voice and gesture solutions.

Natural User Interface (NUI) is a term used to describe a number of technologies such as speech recognition, multi-touch, and kinetic interfaces. Gesture and voice control are two exciting computer input modalities for the NUI. Some believe that NUI is the next step forward from the traditional graphical user interface (GUI), which employs a mouse and keyboard as the primary means of input. The goal of NUI is to develop interfaces that do not have a steep learning curve and the interactions with these interfaces are "natural" and intuitive to the user. One disadvantage of current GUIs is that they require the users to be physically near an input device in order to interact with the system. With the NUI, however, through using voice and gesture commands, the user is able to interact with the system anywhere they want within the defined work environment. Such "Interface Anywhere" gesture ability is achievable using infrared technology. The voice recognition portion is achievable through array microphones and Kinect software. Our NUI system of choice for this proof of concept is the Microsoft Kinect sensor. The heart of the system and what makes gesture recognition possible is the Kinect's skeleton tracking ability. The Kinect contains an infrared projector and receiver, a normal RGB camera, and an array of four microphones. The system tracks multiple users in x-, y-, and z-space. Based on the depth information, the Kinect generates a skeleton using joint position.

The synthesis of a series of Pt{κ3-N,C,N′-[L]}X (X = Cl, RCC) pincer complexes derived from purine and purine nucleosides is reported. In these complexes, the 6-phenylpurine skeleton provides the N,C-cyclometalated fragment, whereas an amine, imine, or pyridine substituent of the phenyl ring supplies the additional N′-coordination point to the pincer complex. The purine N,C-fragment has two coordination positions with the metal (N1 and N7), but the formation of the platinum complexes is totally regioselective. Coordination through the N7 position leads to the thermodynamically favored [6.5]-Pt{κ3-N7,C,N′-[L]}X complexes. However, the coordination through the N1 position is preferred by the amino derivatives, leading to the isomeric kinetic [5.5]-Pt{κ3-N1,C,N′-[L]}X complexes. Extension of the reported methodology to complexes having both pincer and acetylide ligands derived from nucleosides allows the preparation of novel heteroleptic bis-nucleoside compounds that could be regarded as organometallic models of Pt-induced interstrand cross-link. Complexes having amine or pyridine arms are green phosphorescence emitters upon photoexcitation at low concentrations in CH2Cl2 solution and in poly(methyl methacrylate) (PMMA) films. They undergo self-quenching at high concentrations due to molecular aggregation. The presence of intermolecular π–π stacking and weak Pt···Pt interactions was also observed in the solid state by X-ray diffraction analysis.

Total syntheses of (±)-guanacastepenes N and O were accomplished with 2-cycloheptenone as starting material. The six- and five-membered rings of the core [5, 7, 6] ring skeleton were constructed with an intramolecular Diels–Alder reaction and α-carbonyl radical cyclization. The quaternary centers and their stereochemistry were established with sequential Cu(I)-mediated conjugate additions. A sequence with dihydroxylation, conjugate addition, and β-elimination was devised to incorporate all oxygen functionalities at positions. The total synthesis is adaptable for the synthesis of enantiopure guanacastepenes N and O using chiral intermediate (R)-3-vinyl-2-cycloheptenol obtained from lipase-catalyzed kinetic resolution.

We report a TMSI-promoted Prins cyclization reaction with ketones as carbonyl partners to prepare polysubstituted chiral spirotetrahydropyrans. In the presence of racemic 2-methylcyclohexanone a dynamic kinetic resolution occurred affording one stereoisomer. The observed enantiospecificity has been rationalized by DFT calculation.