A5001497054- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neuroscience and Neural Engineering
- Photoreceptor and optogenetics research
- Nuclear physics research studies
- Neural dynamics and brain function
- Particle accelerators and beam dynamics
- Advanced X-ray Imaging Techniques
- Advanced Memory and Neural Computing
- Advanced NMR Techniques and Applications
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Recommender Systems and Techniques
- Advanced MRI Techniques and Applications
- Electron Spin Resonance Studies
- Atomic and Subatomic Physics Research
- Medical Imaging Techniques and Applications
- Astrophysics and Cosmic Phenomena
- Advanced Electron Microscopy Techniques and Applications
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Gyrotron and Vacuum Electronics Research
- Radiomics and Machine Learning in Medical Imaging
- Laser Design and Applications
Google (United States)
2024
California Institute of Technology
1983-2005
Massachusetts Institute of Technology
1973
Received 20 December 1967DOI:https://doi.org/10.1103/PhysRevLett.20.292©1968 American Physical Society
Electron-proton elastic-scattering cross sections have been measured at the Stanford Linear Accelerator Center for four-momentum transfers squared ${q}^{ 2}$ from 1.0 to 25.0 ${(\frac{\mathrm{GeV}}{c})}^{2}$. The electric (${G}_{{E}_{p}}$) and magnetic (${G}_{{M}_{p}}$) form factors of proton were not separated, since angular distributions each 2}$. However, values ${G}_{{M}_{p}}$ derived assuming various relations between ${G}_{{E}_{p}}$ ${G}_{{M}_{p}}$. Several theoretical models behavior...
A novel method for long-term recording and simulation applicable to cultured neurons has been developed. Silicon-based microelectrodes have fabricated using integrated-circuit technology micromachining. The chronic connection is made by positioning the tip of 'diving-board electrode' into contact with top cell body. electrode support structure then glued bottom culture dish. Two-way electrical connections Helisoma B19 maintained up four days. This capability makes it possible conduct...
Data are presented on production by 200-GeV/c hadrons incident beryllium of both single particles and jets (groups particles) with high ${p}_{T}$ (transverse momentum). The experiment was performed in a wide-aperture multiparticle spectrometer at Fermilab. jet single-particle cross sections have similar shape from ${p}_{T}=3 \mathrm{to} 5$ GeV/c but the section is over two orders magnitude larger. distributions charged-particle momenta show striking similarities to those observed...
Differential cross sections for the reactions $\overline{p}p\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ and $\overline{p}p\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}$ have been measured in angular region $0.65\ensuremath{\lesssim}|{cos\ensuremath{\theta}}_{\mathrm{c}.\mathrm{m}.}|<1.0$ at 13 momenta between 0.7 2.4 GeV/c. These combined with those of Fong et al. $|{cos\ensuremath{\theta}}_{\mathrm{c}.\mathrm{m}.}|\ensuremath{\lesssim}0.70$ to...
This paper presents results from an experiment on the production of jets (groups particles) with high ${p}_{\ensuremath{\perp}}$ produced in 200-GeV/c interactions. Results are presented comparison jet cross sections aluminum and hydrogen targets. The fragmentation distributions also examined. Both section structure found to depend strongly beam target types.
Experimental limits have been set on the cross sections for $\overline{p}+p\ensuremath{\rightarrow}{e}^{+}+{e}^{\ensuremath{-}}$ antiprotons with incident momenta of 1.47 and 2.40 GeV/c. These results imply upper magnitude proton form factors timelike four-momentum transfer 5.1 6.6 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$. The reaction $\overline{p}+p\ensuremath{\rightarrow}\ensuremath{\gamma}+\ensuremath{\gamma}$ has studied at same momenta. This process apparently observed...
This is a report on measurement of pp elastic scattering for 30° ≤ 0 c.m. 90° and incident momenta between 1.0 2.50 BeV/c. In the past rather extensive counter measurements(1) this cross section have been made at high energies low momentum transfers, but little data exist large transfer. The hydrogen bubble chambers(2,3) produced 3.0 4.0 BeV/c, number events transfer limited statistical accuracy poor.
This paper presents a refined method and design fabricating parylene neurocages for in vitro studies of live neural networks. fabrication process is less complex than previous neurocage neurowell processes. Parylene are biocompatible very robust, making them ideally suited studying the synaptic connections between individual neurons to gain insight into learning memory. TThe study showed that robust can be created achieve significantly higher neuronal survival outgrowth rate versions....
Elastic scattering of $\overline{p}$ on $p$ has been studied for ${cos\ensuremath{\theta}}_{\mathrm{c}.\mathrm{m}.}$ between -0.88 and -1.0 ${P}_{\mathrm{lab}}(\overline{p})$ 0.70 2.16 GeV/c. The momentum dependence the cross section shows a sharp dip at 0.9 GeV/c broad peaking around 1.4 possibility peak resulting from direct formation boson resonances studied. Alternatively, diffraction model agrees qualitatively with our data other elastic different angles.
Here we present a surface-micromachined Parylene neuro-cage array for the in vitro study of live neural networks. Various types neuro-cages have been fabricated and several adhesion promotion techniques explored. The biocompatibility mechanical robustness demonstrated through cell culture experiments. Dissociated neuronal bodies inserted one to cage cultured, allowing neurites grow out channels form In addition, there is no observable difference between growth on oxide surfaces. It possible...
We present a refined method and design for building parylene neurocages in vitro studies of live neural networks. Parylene are biocompatible very robust, making them ideally suited studying the synaptic connections between individual neurons to gain insight into learning memory. The neurocage fabrication process is significantly less complex than earlier versions. Previous designs achieved limited neuronal outgrowth; however, long-term cell survival rate was <25%. incorporation new materials...
Data on inclusive jet production in the transverse-momentum (${p}_{\ensuremath{\perp}}$) range 0-8 GeV/c for 200-GeV/c $p$, ${\ensuremath{\pi}}^{\ensuremath{-}}$, ${\ensuremath{\pi}}^{+}$, ${K}^{\ensuremath{-}}$, ${K}^{+}$, and $\overline{p}$ incident a hydrogen target are presented. The cross section is fully corrected losses biases, compared with predictions of model based quantum chromodynamics. Both absolute charged-particle distributions inside outside qualitative agreement model.
Evaluation of policies in recommender systems typically involves A/B testing using live experiments on real users to assess a new policy's impact relevant metrics. This ``gold standard'' comes at high cost, however, terms cycle time, user and potential retention. In developing for ``onboarding'' users, these costs can be especially problematic, since on-boarding occurs only once. this work, we describe simulation methodology used augment (and reduce) the use experiments. We illustrate its...
Results are presented on the production of single charged particles with transverse momentum in range 0.8-4.5 GeV/c ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}p$, ${K}^{\ensuremath{-}}p$, and $\mathrm{pp}$ collisions at 200 correlations between trigger particle opposite azimuthal angle.
In a recent series of experiments, ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}p$ and ${K}^{\ifmmode\pm\else\textpm\fi{}}p$ backward scattering $\overline{p}p$ annihilations into ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ ${K}^{+}{K}^{\ensuremath{-}}$ in the forward-backward direction have been measured. These data are compared assuming dominance baryon-exchange amplitude validity crossing-symmetry relations.
Work in progress toward the creation of a "cultured neuron probe" is described. This silicon structure similar to that for multielectrode probe, but with embedded neurons which are intended grow out and integrate host nervous system into probe has been inserted. Each close proximity an electrode designed extracellular estimation recording from neuron. In this way may provide highly specific long-term communication link between external electronics host. Initial experiments establish...
A counter-spark-chamber experiment has been performed to measure the annihilation reactions $\overline{p} p$ ${\ensuremath{\pi}}^{+} \ensuremath{\pi}$ and ${K}^{+} K$ in energy region 0.7-2.4 GeV/c. The angular covered was $0.65\ensuremath{\le}cos{\ensuremath{\theta}}_{\mathrm{c}.\mathrm{m}.}\ensuremath{\le}1.0$. data were taken order study heavy bosons (mass greater than two nucleons) that might couple system. Our have combined with from a previous BNL-Caltech give complete folded...