1,433 results on '"Simmons, C."'
Search Results
2. Clinical utility of MRI in the neoadjuvant management of early-stage breast cancer
- Author
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Corke, L., Luzhna, L., Willemsma, K., Illmann, C., Mcdermott, M., Wilson, C., Simmons, C., and LeVasseur, N.
- Published
- 2022
- Full Text
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3. Signatures of atomic-scale structure in the energy dispersion and coherence of a Si quantum-dot qubit
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Abadillo-Uriel, J. C., Thorgrimsson, Brandur, Kim, Dohun, Smith, L. W., Simmons, C. B., Ward, Daniel R., Foote, Ryan H., Corrigan, J., Savage, D. E., Lagally, M. G., Calderón, M. J., Coppersmith, S. N., Eriksson, M. A., and Friesen, Mark
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
We report anomalous behavior in the energy dispersion of a three-electron double-quantum-dot hybrid qubit and argue that it is caused by atomic-scale disorder at the quantum-well interface. By employing tight-binding simulations, we identify potential disorder profiles that induce behavior consistent with the experiments. The results indicate that disorder can give rise to "sweet spots" where the decoherence caused by charge noise is suppressed, even in a parameter regime where true sweet spots are unexpected. Conversely, "hot spots" where the decoherence is enhanced can also occur. Our results suggest that, under appropriate conditions, interfacial atomic structure can be used as a tool to enhance the fidelity of Si double-dot qubits., Comment: 7 pages
- Published
- 2018
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4. Extending the coherence of a quantum dot hybrid qubit
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Thorgrimsson, Brandur, Kim, Dohun, Yang, Yuan-Chi, Smith, L. W., Simmons, C. B., Ward, Daniel R., Foote, Ryan H., Corrigan, J., Savage, D. E., Lagally, M. G., Friesen, Mark, Coppersmith, S. N., and Eriksson, M. A.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
Identifying and ameliorating dominant sources of decoherence are important steps in understanding and improving quantum systems. Here we show that the free induction decay time ($T_{2}^{*}$) and the Rabi decay rate ($\Gamma_{\mathrm{Rabi}}$) of the quantum dot hybrid qubit can be increased by more than an order of magnitude by appropriate tuning of the qubit parameters and operating points. By operating in the spin-like regime of this qubit, and choosing parameters that increase the qubit's resilience to charge noise (which we show is presently the limiting noise source for this qubit), we achieve a Ramsey decay time $T_{2}^{*}$ of $177~\mathrm{ns}$ and a Rabi decay time, $1/\Gamma_{\mathrm{Rabi}}$, exceeding $1~\mathrm{\mu s}$. We find that the slowest $\Gamma_{\mathrm{Rabi}}$ is limited by fluctuations in the Rabi frequency induced by charge noise and not by fluctuations in the qubit energy itself., Comment: 10 pages, 6 figures. Supplementary material is included as appendices
- Published
- 2016
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5. Projecting effects of land use change on human well-being through changes in ecosystem services
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Yee, Susan H., Paulukonis, E., Simmons, C., Russell, M., Fulford, R., Harwell, L., and Smith, L.M.
- Published
- 2021
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6. Impact of sequence order of anthracyclines and taxanes in neoadjuvant chemotherapy on pathologic complete response rate in HER2-negative breast cancer patients
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Tesch, M. E., Chia, S. K., Simmons, C. E., and LeVasseur, N.
- Published
- 2021
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7. Identifying single electron charge sensor events using wavelet edge detection
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Prance, J. R., Van Bael, B. J., Simmons, C. B., Savage, D. E., Lagally, M. G., Friesen, Mark, Coppersmith, S. N., and Eriksson, M. A.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
The operation of solid-state qubits often relies on single-shot readout using a nanoelectronic charge sensor, and the detection of events in a noisy sensor signal is crucial for high fidelity readout of such qubits. The most common detection scheme, comparing the signal to a threshold value, is accurate at low noise levels but is not robust to low-frequency noise and signal drift. We describe an alternative method for identifying charge sensor events using wavelet edge detection. The technique is convenient to use and we show that, with realistic signals and a single tunable parameter, wavelet detection can outperform thresholding and is significantly more tolerant to 1/f and low-frequency noise., Comment: 11 pages, 4 figures
- Published
- 2015
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8. High fidelity resonant gating of a silicon based quantum dot hybrid qubit
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Kim, Dohun, Ward, D. R., Simmons, C. B., Savage, D. E., Lagally, M. G., Friesen, Mark, Coppersmith, S. N., and Eriksson, Mark A.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
Isolated spins in semiconductors provide a promising platform to explore quantum mechanical coherence and develop engineered quantum systems. Silicon has attracted great interest as a host material for developing spin qubits because of its weak spin-orbit coupling and hyperfine interaction, and several architectures based on gate defined quantum dots have been proposed and demonstrated experimentally. Recently, a quantum dot hybrid qubit formed by three electrons in double quantum dot was proposed, and non-adiabatic pulsed-gate operation was implemented experimentally, demonstrating simple and fast electrical manipulations of spin states with a promising ratio of coherence time to manipulation time. However, the overall gate fidelity of the pulse-gated hybrid qubit is limited by relatively fast dephasing due to charge noise during one of the two required gate operations. Here we perform the first microwave-driven gate operations of a quantum dot hybrid qubit, avoiding entirely the regime in which it is most sensitive to charge noise. Resonant detuning modulation along with phase control of the microwaves enables a pi rotation time of less than 5 ns (50 ps) around X(Z)-axis with high fidelities > 93 (96) %. We also implement Hahn echo and Carr-Purcell (CP) dynamic decoupling sequences with which we demonstrate a coherence time of over 150 ns. We further discuss a pathway to improve gate fidelity to above 99 %, exceeding the threshold for surface code based quantum error correction., Comment: 9 pages and 6 figures including supplementary information
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- 2015
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9. Evolving Practice Patterns Over Two Decades (1993–2013) in the Management of Desmoid-type Fibromatosis in British Columbia
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de Bruyns, A., Li, H., MacNeil, A., Simmons, C., Clarkson, P., Goddard, K., Munk, P.L., Hart, J.J., Holloway, C., Truong, P., and Feng, X.
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- 2020
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10. THE ROLE OF MICRORNAS IN HYPERTROPHIC CARDIOMYOPATHY: INSIGHTS FROM PATIENT-DERIVED INDUCED PLURIPOTENT STEM CELL CARDIOMYOCYTES AND MYOCARDIAL TISSUE
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Adao, D., primary, Simmons, C., additional, and Billia, F., additional
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- 2023
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11. INTERRUPTIONS IN TRASTUZUMAB THERAPY FOR BREAST CANCER ARE ASSOCIATED WITH ADVERSE CARDIOVASCULAR AND ONCOLOGIC OUTCOMES
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Gibson, J., primary, Yao, R., additional, Guan, M., additional, Karim, E., additional, Simmons, C., additional, and Davis, M., additional
- Published
- 2023
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12. Adverse childhood experiences, social participation and multimorbidity risk in Europe
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Deschenes, S, primary, Simmons, C, additional, Elsden, E, additional, McInerney, A, additional, Lowry, E, additional, and Rodrigues, R, additional
- Published
- 2023
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13. Microwave-driven coherent operations of a semiconductor quantum dot charge qubit
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Kim, Dohun, Ward, D. R., Simmons, C. B., Gamble, John King, Blume-Kohout, Robin, Nielsen, Erik, Savage, D. E., Lagally, M. G., Friesen, Mark, Coppersmith, S. N., and Eriksson, M. A.
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Condensed Matter - Mesoscale and Nanoscale Physics ,Quantum Physics - Abstract
A most intuitive realization of a qubit is a single electron charge sitting at two well-defined positions, such as the left and right sides of a double quantum dot. This qubit is not just simple but also has the potential for high-speed operation, because of the strong coupling of electric fields to the electron. However, charge noise also couples strongly to this qubit, resulting in rapid dephasing at nearly all operating points, with the exception of one special 'sweet spot'. Fast dc voltage pulses have been used to manipulate semiconductor charge qubits, but these previous experiments did not achieve high-fidelity control, because dc gating requires excursions away from the sweet spot. Here, by using resonant ac microwave driving, we achieve coherent manipulation of a semiconductor charge qubit, demonstrating a Rabi frequency of up to 2GHz, a value approaching the intrinsic qubit frequency of 4.5GHz. Z-axis rotations of the qubit are well-protected at the sweet spot, and by using ac gating, we demonstrate the same protection for rotations about arbitrary axes in the X-Y plane of the qubit Bloch sphere. We characterize operations on the qubit using two independent tomographic approaches: standard process tomography and a newly developed method known as gate set tomography. Both approaches show that this qubit can be operated with process fidelities greater than 86% with respect to a universal set of unitary single-qubit operations., Comment: 9 pages, 5 figures including supplementary information
- Published
- 2014
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14. Quantum control and process tomography of a semiconductor quantum dot hybrid qubit
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Kim, Dohun, Shi, Zhan, Simmons, C. B., Ward, D. R., Prance, J. R., Koh, Teck Seng, Gamble, John King, Savage, D. E., Lagally, M. G., Friesen, Mark, Coppersmith, S. N., and Eriksson, M. A.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
The similarities between gated quantum dots and the transistors in modern microelectronics - in fabrication methods, physical structure, and voltage scales for manipulation - have led to great interest in the development of quantum bits (qubits) in semiconductor quantum dots. While quantum dot spin qubits have demonstrated long coherence times, their manipulation is often slower than desired for important future applications, such as factoring. Further, scalability and manufacturability are enhanced when qubits are as simple as possible. Previous work has increased the speed of spin qubit rotations by making use of integrated micromagnets, dynamic pumping of nuclear spins, or the addition of a third quantum dot. Here we demonstrate a new qubit that offers both simplicity - it requires no special preparation and lives in a double quantum dot with no added complexity - and is very fast: we demonstrate full control on the Bloch sphere with $\pi$-rotation times less than 100 ps in two orthogonal directions. We report full process tomography, extracting high fidelities equal to or greater than 85% for X-rotations and 94% for Z-rotations. We discuss a path forward to fidelities better than the threshold for quantum error correction., Comment: 6 pages, excluding Appendix
- Published
- 2014
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15. Fast coherent manipulation of three-electron states in a double quantum dot
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Shi, Zhan, Simmons, C. B., Ward, Daniel R., Prance, J. R., Wu, Xian, Koh, Teck Seng, Gamble, John King, Savage, D. E., Lagally, M. G., Friesen, Mark, Coppersmith, S. N., and Eriksson, M. A.
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
A fundamental goal in the manipulation of quantum systems is the achievement of many coherent oscillations within the characteristic dephasing time T2*[1]. Most manipulations of electron spins in quantum dots have focused on the construction and control of two-state quantum systems, or qubits, in which each quantum dot is occupied by a single electron[2-7]. Here we perform quantum manipulations on a system with more electrons per quantum dot, in a double dot with three electrons. We demonstrate that tailored pulse sequences can be used to induce coherent rotations between 3-electron quantum states. Certain pulse sequences yield coherent oscillations with a very high figure of merit (the ratio of coherence time to rotation time) of >100. The presence of the third electron enables very fast rotations to all possible states, in contrast to the case when only two electrons are used, in which some rotations are slow. The minimum oscillation frequency we observe is >5 GHz., Comment: 5 pages, 2 figures, submitted for publication
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- 2013
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16. Coherent Quantum Oscillations in a Silicon Charge Qubit
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Shi, Zhan, Simmons, C. B., Ward, Daniel. R., Prance, J. R., Mohr, R. T., Koh, Teck Seng, Gamble, John King, Wu, Xian., Savage, D. E., Lagally, M. G., Friesen, Mark, Coppersmith, S. N., and Eriksson, M. A.
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Condensed Matter - Mesoscale and Nanoscale Physics ,Quantum Physics - Abstract
Fast quantum oscillations of a charge qubit in a double quantum dot fabricated in a Si/SiGe heterostructure are demonstrated and characterized experimentally. The measured inhomogeneous dephasing time T2* ranges from 127ps to ~2.1ns; it depends substantially on how the energy difference of the two qubit states varies with external voltages, consistent with a decoherence process that is dominated by detuning noise(charge noise that changes the asymmetry of the qubit's double-well potential). In the regime with the shortest T2*, applying a charge-echo pulse sequence increases the measured inhomogeneous decoherence time from 127ps to 760ps, demonstrating that low-frequency noise processes are an important dephasing mechanism., Comment: 5 pages plus 3 page supplemental (8 pages total)
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- 2012
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17. A fast 'hybrid' silicon double quantum dot qubit
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Shi, Zhan, Simmons, C. B., Prance, J. R., Gamble, John King, Koh, Teck Seng, Shim, Yun-Pil, Hu, Xuedong, Savage, D. E., Lagally, M. G., Eriksson, M. A., Friesen, Mark, and Coppersmith, S. N.
- Subjects
Quantum Physics ,Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
We propose a quantum dot qubit architecture that has an attractive combination of speed and fabrication simplicity. It consists of a double quantum dot with one electron in one dot and two electrons in the other. The qubit itself is a set of two states with total spin quantum numbers $S^2=3/4$ ($S=\half$) and $S_z = -\half$, with the two different states being singlet and triplet in the doubly occupied dot. The architecture is relatively simple to fabricate, a universal set of fast operations can be implemented electrically, and the system has potentially long decoherence times. These are all extremely attractive properties for use in quantum information processing devices., Comment: Includes text and supplemental material, 12 pages, 9 figures
- Published
- 2011
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18. Single-shot measurement of triplet-singlet relaxation in a Si/SiGe double quantum dot
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Prance, J. R., Shi, Zhan, Simmons, C. B., Savage, D. E., Lagally, M. G., Schreiber, L. R., Vandersypen, L. M. K., Friesen, Mark, Joynt, Robert, Coppersmith, S. N., and Eriksson, M. A.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
We investigate the lifetime of two-electron spin states in a few-electron Si/SiGe double dot. At the transition between the (1,1) and (0,2) charge occupations, Pauli spin blockade provides a readout mechanism for the spin state. We use the statistics of repeated single-shot measurements to extract the lifetimes of multiple states simultaneously. At zero magnetic field, we find that all three triplet states have equal lifetimes, as expected, and this time is ~10 ms. At non-zero field, the T0 lifetime is unchanged, whereas the T- lifetime increases monotonically with field, reaching 3 seconds at 1 T., Comment: 4 pages, 3 figures, supplemental information. Typos fixed; updated to submitted version
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- 2011
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19. Tunable singlet-triplet splitting in a few-electron Si/SiGe quantum dot
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Shi, Zhan, Simmons, C. B., Prance, J. R., Gamble, John King, Friesen, Mark, Savage, D. E., Lagally, M. G., Coppersmith, S. N., and Eriksson, M. A.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
We measure the excited-state spectrum of a Si/SiGe quantum dot as a function of in-plane magnetic field, and we identify the spin of the lowest three eigenstates in an effective two-electron regime. The singlet-triplet splitting is an essential parameter describing spin qubits, and we extract this splitting from the data. We find it to be tunable by lateral displacement of the dot, which is realized by changing two gate voltages on opposite sides of the device. We present calculations showing the data are consistent with a spectrum in which the first excited state of the dot is a valley-orbit state., Comment: 4 pages with 3 figures
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- 2011
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20. Tunable spin-selective loading of a silicon spin qubit
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Simmons, C. B., Prance, J. R., Van Bael, B. J., Koh, Teck Seng, Shi, Zhan, Savage, D. E., Lagally, M. G., Joynt, R., Friesen, Mark, Coppersmith, S. N., and Eriksson, M. A.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
The remarkable properties of silicon have made it the central material for the fabrication of current microelectronic devices. Silicon's fundamental properties also make it an attractive option for the development of devices for spintronics and quantum information processing. The ability to manipulate and measure spins of single electrons is crucial for these applications. Here we report the manipulation and measurement of a single spin in a quantum dot fabricated in a silicon/silicon-germanium heterostructure. We demonstrate that the rate of loading of electrons into the device can be tuned over an order of magnitude using a gate voltage, that the spin state of the loaded electron depends systematically on the loading voltage level, and that this tunability arises because electron spins can be loaded through excited orbital states of the quantum dot. The longitudinal spin relaxation time T1 is measured using single-shot pulsed techniques and found to be ~3 seconds at a field of 1.85 Tesla. The demonstration of single spin measurement as well as a long spin relaxation time and tunability of the loading are all favorable properties for spintronics and quantum information processing applications., Comment: 4 pages, 3 figures, Supplemental Information
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- 2010
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21. Single-shot measurement and tunnel-rate spectroscopy of a Si/SiGe few-electron quantum dot
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Thalakulam, Madhu, Simmons, C. B., Van Bael, B. J., Rosemeyer, B. M., Savage, D. E., Lagally, M. G., Friesen, Mark, Coppersmith, S. N., and Eriksson, M. A.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
We investigate the tunnel rates and energies of excited states of small numbers of electrons in a quantum dot fabricated in a Si/SiGe heterostructure. Tunnel rates for loading and unloading electrons are found to be strongly energy dependent, and they vary significantly between different excited states. We show that this phenomenon enables charge sensing measurements of the average electron occupation that are analogous to Coulomb diamonds. Excited-state energies can be read directly from the plot, and we develop a rate model that enables a quantitative understanding of the relative sizes of different electron tunnel rates., Comment: 9 pages
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- 2010
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22. Pauli spin blockade and lifetime-enhanced transport in a Si/SiGe double quantum dot
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Simmons, C. B., Koh, Teck Seng, Shaji, Nakul, Thalakulam, Madhu, Klein, L. J., Qin, Hua, Luo, H., Savage, D. E., Lagally, M. G., Rimberg, A. J., Joynt, Robert, Blick, Robert, Friesen, Mark, Coppersmith, S. N., and Eriksson, M. A.
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
We analyze electron transport data through a Si/SiGe double quantum dot in terms of spin blockade and lifetime-enhanced transport (LET), which is transport through excited states that is enabled by long spin relaxation times. We present a series of low-bias voltage measurements showing the sudden appearance of a strong tail of current that we argue is an unambiguous signature of LET appearing when the bias voltage becomes greater than the singlet-triplet splitting for the (2,0) electron state. We present eight independent data sets, four in the forward bias (spin-blockade) regime and four in the reverse bias (lifetime-enhanced transport) regime, and show that all eight data sets can be fit to one consistent set of parameters. We also perform a detailed analysis of the reverse bias (LET) regime, using transport rate equations that include both singlet and triplet transport channels. The model also includes the energy dependent tunneling of electrons across the quantum barriers, and resonant and inelastic tunneling effects. In this way, we obtain excellent fits to the experimental data, and we obtain quantitative estimates for the tunneling rates and transport currents throughout the reverse bias regime. We provide a physical understanding of the different blockade regimes and present detailed predictions for the conditions under which LET may be observed., Comment: published version, 18 pages
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- 2010
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23. Unconventional Transport in the 'Hole' Regime of a Si Double Quantum Dot
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Koh, Teck Seng, Simmons, C. B., Eriksson, M. A., Coppersmith, S. N., and Friesen, Mark
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
Studies of electronic charge transport through semiconductor double quantum dots rely on a conventional "hole" model of transport in the three-electron regime. We show that experimental measurements of charge transport through a Si double quantum dot in this regime cannot be fully explained using the conventional picture. Using a Hartree-Fock (HF) formalism and relevant HF energy parameters extracted from transport data in the multiple-electron regime, we identify a novel spin-flip cotunneling process that lifts a singlet blockade., Comment: Supplemental material included as an appendix
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- 2010
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24. Fast tunnel rates in Si/SiGe one-electron single and double quantum dots
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Thalakulam, Madhu, Simmons, C. B., Rosemeyer, B. M., Savage, D. E., Lagally, M. G., Friesen, Mark, Coppersmith, S. N., and Eriksson, M. A.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
We report the fabrication and measurement of one-electron single and double quantum dots with fast tunnel rates in a Si/SiGe heterostructure. Achieving fast tunnel rates in few-electron dots can be challenging, in part due to the large electron effective mass in Si. Using charge sensing, we identify signatures of tunnel rates in and out of the dot that are fast or slow compared to the measurement rate. Such signatures provide a means to calibrate the absolute electron number and verify single electron occupation. Pulsed gate voltage measurements are used to validate the approach., Comment: 4 pages, double column, 3 figures
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- 2010
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25. Charge sensing and controllable tunnel coupling in a Si/SiGe double quantum dot
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Simmons, C. B., Thalakulam, Madhu, Rosemeyer, B. M., Van Bael, B. J., Sackmann, E. K., Savage, D. E., Lagally, M. G., Joynt, R., Friesen, M., Coppersmith, S. N., and Eriksson, M. A.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
We report integrated charge sensing measurements on a Si/SiGe double quantum dot. The quantum dot is shown to be tunable from a single, large dot to a well-isolated double dot. Charge sensing measurements enable the extraction of the tunnel coupling, t, between the quantum dots as a function of the voltage on the top gates defining the device. Control of the voltage on a single such gate tunes the barrier separating the two dots. The measured tunnel coupling is an exponential function of the gate voltage. The ability to control t is an important step towards controlling spin qubits in silicon quantum dots., Comment: 5 pages, 4 figures, submitted for publication
- Published
- 2009
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26. Single-electron quantum dot in Si/SiGe with integrated charge-sensing
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Simmons, C. B., Thalakulam, Madhu, Shaji, Nakul, Klein, Levente J., Qin, Hua, Blick, R. H., Savage, D. E., Lagally, M. G., Coppersmith, S. N., and Eriksson, M. A.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
Single-electron occupation is an essential component to measurement and manipulation of spin in quantum dots, capabilities that are important for quantum information processing. Si/SiGe is of interest for semiconductor spin qubits, but single-electron quantum dots have not yet been achieved in this system. We report the fabrication and measurement of a top-gated quantum dot occupied by a single electron in a Si/SiGe heterostructure. Transport through the quantum dot is directly correlated with charge-sensing from an integrated quantum point contact, and this charge-sensing is used to confirm single-electron occupancy in the quantum dot., Comment: 3 pages, 3 figures, accepted version, to appear in Applied Physics Letters
- Published
- 2007
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27. Spin blockade and lifetime-enhanced transport in a few-electron Si/SiGe double quantum dot
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Shaji, Nakul, Simmons, C. B., Thalakulam, Madhu, Klein, Levente J., Qin, Hua, Luo, H., Savage, D. E., Lagally, M. G., Rimberg, A. J., Joynt, R., Friesen, M., Blick, R. H., Coppersmith, S. N., and Eriksson, M. A.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
Spin blockade occurs when an electron is unable to access an energetically favorable path through a quantum dot due to spin conservation, resulting in a blockade of the current through the dot. Spin blockade is the basis of a number of recent advances in spintronics, including the measurement and the manipulation of individual electron spins. We report measurements of the spin blockade regime in a silicon double quantum dot, revealing a complementary phenomenon: lifetime-enhanced transport. We argue that our observations arise because the decay times for electron spins in silicon are long, enabling the electron to maintain its spin throughout its transit across the quantum dot and access fast paths that exist in some spin channels but not in others. Such long spin lifetimes are important for applications such as quantum computation and, more generally, spintronics., Comment: Published version. Supplementary Information in appendices
- Published
- 2007
28. Modulation of Sphingolipid Metabolism and SARS-CoV-2 Infection in Lung
- Author
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Single, S.L., primary, Khan, R., additional, Simmons, C., additional, Bodduluri, S., additional, Benson, P.V., additional, Goliwas, K., additional, and Deshane, J., additional
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- 2023
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29. Conservation and genomic diversity of a rare tree, Eucalyptus imlayensis (Myrtaceae), regenerating after wildfire
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Simmons, C. Laura, primary, Wright, Genevieve T, additional, Mcdougall, Keith L, additional, and James, Elizabeth A, additional
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- 2023
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30. Nutritional And Inflammatory Prognosticators In Advanced Cancer
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Sullivan, E.S., primary, Daly, L.E., additional, Dolan, R., additional, McMillan, D., additional, Ní Bhuachalla, É.B., additional, Power, D.G., additional, Fallon, M., additional, Simmons, C., additional, Laird, B., additional, and Ryan, A.M., additional
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- 2023
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31. Trapped Ion Quantum Computer Research at Los Alamos
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James, D. F. V., Gulley, M. S., Holzscheiter, M. H., Hughes, R. J., Kwiat, P. G., Lamoreaux, S. K., Peterson, C. G., Sandberg, V. D., Schauer, M. M., Simmons, C. M., Tupa, D., Wang, P. Z., and White, A. G.
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Quantum Physics - Abstract
We briefly review the development and theory of an experiment to investigate quantum computation with trapped calcium ions. The ion trap, laser and ion requirements are determined, and the parameters required for simple quantum logic operations are described, Comment: 12 pages, 6 figures; to appear in Proc. NASA-QCQC'98
- Published
- 1998
32. Practical free-space quantum key distribution over 1 km
- Author
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Buttler, W. T., Hughes, R. J., Kwiat, P. G., Lamoreaux, S. K., Luther, G. G., Morgan, G. L., Nordholt, J. E., Peterson, C. G., and Simmons, C. M.
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Quantum Physics - Abstract
A working free-space quantum key distribution (QKD) system has been developed and tested over an outdoor optical path of ~1 km at Los Alamos National Laboratory under nighttime conditions. Results show that QKD can provide secure real-time key distribution between parties who have a need to communicate secretly. Finally, we examine the feasibility of surface to satellite QKD., Comment: 5 pages, 2 figures, 2 tables. Submitted to Physics Review Letters, May 1998
- Published
- 1998
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33. Free-space quantum key distribution
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Buttler, W. T., Hughes, R. J., Kwiat, P. G., Luther, G. G., Morgan, G. L., Nordholt, J. E., Peterson, C. G., and Simmons, C. M.
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Quantum Physics - Abstract
A working free-space quantum key distribution (QKD) system has been developed and tested over a 205-m indoor optical path at Los Alamos National Laboratory under fluorescent lighting conditions. Results show that free-space QKD can provide secure real-time key distribution between parties who have a need to communicate secretly., Comment: 5 pages, 2 figures, 2 tables. To be published in Physical review A on or about 1 April 1998
- Published
- 1998
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34. Oceans and Coastal Ecosystems and Their Services
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Cooley, S., Schoeman, D., Bopp, L., Boyd, P., Donner, S., Ito, S. i., Kiessling, W., Martinetto, P., Ojea, E., Racault, M. F., Rost, B., Skern-Mauritzen, M., Ghebrehiwet, D. Y., Bell, J. D., Blanchard, J., Cheung, W. W., Bolin,J., Dupont, S., Cisneros-Montemayor, A., Frölicher, T., Dutkiewicz, S., Molinos, J. G., Gaitán-Espitia, J. D., Henson, S., Gurney-Smith, H., Holland, E., Hidalgo, Manuel, Kordas, R., Kopp, R., Le Bris, N., Kwiatkowski, L., Mark, F. C., Mgaya, Y., Lluch-Cota, S. E., Logan, C., Randin, G., Raja, N. B., Moloney, C., Muñoz Sevilla, N. P., Roe, S., Ruiz Diaz, R., Rajkaran, A., Richardson, A., Scales, K., Scobie, M., Salili, D., Sallée, J. B., Yool, A., Torres, O., Simmons, C. T., Cooley, S., Schoeman, D., Bopp, L., Boyd, P., Donner, S., Ito, S. i., Kiessling, W., Martinetto, P., Ojea, E., Racault, M. F., Rost, B., Skern-Mauritzen, M., Ghebrehiwet, D. Y., Bell, J. D., Blanchard, J., Cheung, W. W., Bolin,J., Dupont, S., Cisneros-Montemayor, A., Frölicher, T., Dutkiewicz, S., Molinos, J. G., Gaitán-Espitia, J. D., Henson, S., Gurney-Smith, H., Holland, E., Hidalgo, Manuel, Kordas, R., Kopp, R., Le Bris, N., Kwiatkowski, L., Mark, F. C., Mgaya, Y., Lluch-Cota, S. E., Logan, C., Randin, G., Raja, N. B., Moloney, C., Muñoz Sevilla, N. P., Roe, S., Ruiz Diaz, R., Rajkaran, A., Richardson, A., Scales, K., Scobie, M., Salili, D., Sallée, J. B., Yool, A., Torres, O., and Simmons, C. T.
- Abstract
Ocean and coastal ecosystems support life on Earth and many aspects of human well-being. Covering two-thirds of the planet, the ocean hosts vast biodiversity and modulates the global climate system by regulating cycles of heat, water and elements, including carbon. Marine systems are central to many cultures, and they also provide food, minerals, energy and employment to people. Since previous assessments1 , new laboratory studies, field observations and process studies, a wider range of model simulations, Indigenous knowledge, and local knowledge have provided increasing evidence on the impacts of climate change on ocean and coastal systems, how human communities are experiencing these impacts, and the potential solutions for ecological and human adaptation.
- Published
- 2023
35. The Los Alamos Trapped Ion Quantum Computer Experiment
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Hughes, R. J., James, D. F. V., Gomez, J. J., Gulley, M. S., Holzscheiter, M. H., Kwiat, P. G., Lamoreaux, S. K., Peterson, C. G., Sandberg, V. D., Schauer, M. M., Simmons, C. M., Thorburn, C. E., Tupa, D., Wang, P. Z., and White, A. G.
- Subjects
Quantum Physics - Abstract
The development and theory of an experiment to investigate quantum computation with trapped calcium ions is described. The ion trap, laser and ion requirements are determined, and the parameters required for quantum logic operations as well as simple quantum factoring are described., Comment: 41 pages, 16 figures, submitted to Fortschritte der Physik
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- 1997
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36. Authority Control at the National Archives and Records Administration
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Reid, Lydia J. E., primary and Simmons, C. Jerry, additional
- Published
- 2018
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37. A randomized phase II study of weekly paclitaxel with or without pelareorep in patients with metastatic breast cancer: final analysis of Canadian Cancer Trials Group IND.213.
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Bernstein, V., Ellard, S. L., Dent, S. F., Tu, D., Mates, M., Dhesy-Thind, S. K., Panasci, L., Gelmon, K. A., Salim, M., Song, X., Clemons, M., Ksienski, D., Verma, S., Simmons, C., Lui, H., Chi, K., Feilotter, H., Hagerman, L. J., and Seymour, L.
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- 2017
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38. Expanding SeqAPASS Capabilities to Protein Structural Comparisons Across Species
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LaLone, Carlie, Botz, M., Schumann, P., Melendez, W., Wilkinson, A., and Simmons, C.
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Bioinformatic methods development ,Toxicology (incl. clinical toxicology) - Abstract
Presented to the Twin Ports Freshwater Folks Meeting on 06/07/2023 Search for CCTE records in EPA’s Science Inventory by typing in the title at this link. https://cfpub.epa.gov/si/si_public_search_results.cfm?advSearch=true&showCriteria=2&keyword=CCTE&TIMSType=&TIMSSubTypeID=&epaNumber=&ombCat=Any&dateBeginPublishedPresented=07/01/2017&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&DEID=&personName=&personID=&role=Any&journalName=&journalID=&publisherName=&publisherID=&sortBy=pubDate&count=25
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- 2023
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39. Cell and Extracellular Matrix Interactions in a Dynamic Biomechanical Environment
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Lam, A. Y. L., primary and Simmons, C. A., additional
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- 2018
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40. A systematic review and quality appraisal of international guidelines for early breast cancer systemic therapy: Are recommendations sensitive to different global resources?
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Gandhi, S., Verma, S., Ethier, J.-L., Simmons, C., Burnett, H., and Alibhai, S.M.H.
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- 2015
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41. An Approach to Include Hydrogeologic Barriers With Unknown Geometric Properties in Groundwater Model Inversions
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Marshall, S. K., primary, Cook, P. G., additional, Simmons, C. T., additional, Konikow, L. F., additional, and Dogramaci, S., additional
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- 2022
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42. Estimating Groundwater Inflow to a Shallow, Poorly-mixed Wetland Using Environmental Tracers
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International Conference on Water Resources and Environment Research (4th : 2008 : Adelaide, S. Aust.), Cook, Peter G, Wood, C, Powell, L, Watt, E, White, T, Brunner, P, and Simmons, C
- Published
- 2008
43. 03. Is ethnicity an appropriate measure of health care marginalization?: A systematic review and meta-analysis of the outcomes of diabetic foot ulceration in the Aboriginal population
- Author
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Johnson, G., Vergis, A., Unger, B., Park, J., Gillman, L., Hickey, K., Pace, D., Azin, A., Guidolin, K., Lam-Tin-Cheung, K., Chadi, S., Quereshy, F., Catton, J., Rubin, B., Bell, J., Marangos, J., Heesters, A., Stuart-McEwan, T., Shariff, F., Wright, F., Ahmed, N., Nadler, A., Hallet, J., Gentles, J., Chen, L., Hwang, H., Parapini, M., Hirpara, D., Sidhu, R., Scott, T., Karimuddin, A., Guo, R., Nguyen, A., Osborn, J., Wiseman, S., Nabata, K., Ertel, E., Lenet, T., Baker, L., Park, L., Vered, M., Zahrai, A., Shorr, R., Davis, A., McIsaac, D., Tinmouth, A., Fergusson, D., Martel, G., Rummel, S., Stefic-Cubic, M., Stewart, M., Melck, A., McKechnie, T., Anpalagan, T., Ichhpuniani, S., Lee, Y., Ramji, K., Eskicioglu, C., Zhu, A., Deng, S., Greene, B., Tsang, M., Palter, V., Jayaraman, S., Mann, A., Tittley, J., Cadeddu, M., Nguyen, M., Madani, A., Pasternak, J., Hong, D., Qu, L., Istl, A., Tang, E., Gray, D., Zuckerman, J., Coburn, N., Callum, J., McLeod, R., Pearsall, E., Lin, Y., Turgeon, A., Mahar, A., Kammili, A., Kriviraltcheva-Kaneva, P., Lee, L., Cools-Lartigue, J., Ferri, L., Mueller, C., Haas, B., Tillman, B., Guttman, M., Chesney, T., Zuk, V., Hsu, A., Chan, W., Vasdev, R., D’Souza, K., Huynh, C., Ling, L. Cadili J., Warburton, R., Hameed, M., Glass, L., Williamson, H., Murphy, P., Leslie, K., Hawel, J., Kerr, L., Zablotny, S., Roldan, H., He, W., Jiang, X., Zheng, B., Fiore, J., Feldman, L., Fried, G., Valanci, S., Balvardi, S., Cipolla, J., Kaneva, P., Demyttenaere, S., Boutros, M., Alhashemi, M., Miles, A., Purich, K., Verhoeff, K., Shapiro, J., Bigam, D., Kung, J., Fecso, A., Mosko, J., Skubleny, D., Hamilton, P., Ghosh, S., Widder, S., Schiller, D., Do, U., El Kefraoui, C., Pook, M., Barone, N., Montgomery, H., Nguyen-Powanda, P., Rajabiyazdi, F., Elhaj, H., Lapointe-Gagner, M., Olleik, G., Antoun, A., Safa, N., Di Lena, E., Meterissian, S., Meguerditchian, A., Lee, F., Baldini, G., Serrano Aybar, P.E., Parpia, S., Ruo, L., Tywonek, K., Lee, S., O’Neill, C., Faisal, N., Alfayyadh, A., Gundayao, M., Meyers, B.M., Habashi, R., Kruse, C., Levin, M., Aldrich, K., Grantcharov, T., Langerman, A., Forbes, H., Anantha, R., Fawcett, V., Hetherington, A., Pravong, V., Gervais, M., Rakovich, G., Selvam, R., Hu, R., Musselman, R., Raiche, I., Moloo, H., Liu, R., Elnahas, A., Alkhamesi, N., Alnumay, A., Schlachta, C., Walser, E., Zhang, C., Cristancho, S., Ott, M., Lee, A., Niu, B., Balaa, F., Gawad, N., Ren, K., Qiu, Y., Hamann, K., How, N., Leveille, C., Davidson, A., Eqbal, A., Sardiwalla, Y., Korostensky, M., Lee, E., Yang, I., Muaddi, H., Stukel, T., de Mestral, C., Nathens, A., Karanicolas, P., Frigault, J., Lemieux, S., Breton, D., Bouchard, P., Bouchard, A., Grégoire, R., Letarte, F., Bouchard, G., Drolet, S., Avoine, S., Gagné, J., Thibault, C., Jutras Bouthillette, N., Gosselin, M., Rosenzveig, A., Stuleanu, T., Jarrar, A., Kolozsvari, N., Skelhorne-Gross, G., Nenshi, R., Jerath, A., Gomez, D., Singh, K., Amir, T., Liu, E., Farquharson, S., Mao, R., Lan, L., Yan, J., Allard-Coutu, A., Mierzwa, A., Tin, R., Brisebois, R., Bradley, N., Wigen, R., Hartford, L., Van Koughnett, J., Vogt, K., Hilsden, R., Parry, N., Allen, L., Raskin, R., Jones, J., Neumann, K., Dwyer, C., Strickland, M., O’Dochartaigh, D., Lobay, K., Kabaroff, A., Chang, E., Sun, W., Beck, J., Davidson, J., Jones, S., Van Hooren, T., Schmitz, E., El Hafid, M., Dang, J., Mocanu, V., Lutzak, G., Sultanian, R., Wong, C., Karmali, S., Petrera, M., Pickell, M., Auer, R., Patro, N., Li, B., Wilson, H., Jogiat, U., Switzer, N., Li, C., Al Hinai, A., Cieply, A., Hawes, H., Joos, E., Saleh, A., Engels, P., Drung, J., Pang, G., Kwong, M., Ellsmere, J., Chang, D., Hutter, M., Spence, R., Abou Khalil, M., Vasilevsky, C., Morin, N., Longtin, Y., Liberman, S., Montpetit, P., Poirier, M., Mukherjee, K., Sebajang, H., Younan, R., Schwenter, F., De Broux, E., Larsen, K., Beckett, A., Nantais, J., Kay, J., Lohre, R., Ayeni, O., Goel, D., de SA, D., He, R., Hylton, D., Bedard, E., Johnson, S., Laing, B., Valji, A., Hanna, W., Turner, S., Akhtar-Danesh, G., Akhtar-Danesh, N., Shargall, Y., Gupta, V., Kidane, B., Limbachia, J., Sullivan, K., Farrokhyar, F., Leontiadis, G., Patel, Y., Churchill, I., Xie, F., Seely, A., Spicer, J., Yasufuku, K., Beauchamp, M., Wald, J., Mbuagbaw, L., Agzarian, J., Finley, C., Fahim, C., Abbas, M., Olaiya, O., Begum, H., Ednie, A., Palma, D., Warner, A., Malthaner, R., Fortin, D., Qiabi, M., Nayak, R., Nguyen, T., Louie, A., Rodrigues, G., Yaremko, B., Laba, J., Inculet, R., Alaichi, J., Mador, B., Lai, H., White, J., Kim, M., Darling, G., Rousseau, M., Samarasinghe, Y., Lee, M., Thiru, L., Levine, O., Juergens, R., Brogly, S., Li, W., Lougheed, D., Petsikas, D., Mistry, N., Gatti, A., Abdul, S., Anestee, C., Gilbert, S., Sundaresan, S., Villeneuve, P., Maziak, D., Razzak, R., Ashrafi, A., Tregobov, N., Hassanzadeh, N., Stone, S., Panjwani, A., Bong, T., Bond, R., Hafizi, A., De Meo, M., Rayes, R., Milette, S., Vagai, M., Usatii, M., Chandrasekaran, A., Giannias, B., Bourdeau, F., Sangwan, V., Bertos, N., Moraes, C., Huang, S., Quail, D., Walsh, L., Camilleri-Broet, S., Fiset, P., Bilgic, E., Quaiattini, A., Maurice-Ventouris, M., Najmeh, S., Esther, L., Lu, J., Malhan, R., Brophy, S., Brennan, K., French, D., Resende, V., Momtazi, M., Solaja, O., Sisson, D., Donahoe, L., Bedard, P., Hansen, A., De Perrot, M., Alghamedi, A., Simone, A., Huang, J., Murthy, S., Lin, J., Li, H., Crowther, M., Linkins, L., Lau, E., Schneider, L., Douketis, J., Greenberg, B., Allen-Avodabo, C., Davis, L., Zhao, H., Sirois, C., Mulder, D., Al Rawahi, A., Aftab Abdul, S., Nguyen, D., Anstee, C., Delic, E., Sasewich, H., Islam, T., Low, D., Humer, M., Le Nguyen, D., Kay, M., Shayegan, B., Adili, A., Kaafarani, M., Chouiali, F., Muthukrishnan, N., Maleki, F., Ovens, K., Gold, M., Sorin, M., Falutz, R., Forghani, R., Hunka, N., Kennedy, R., Bigsby, R., Bharadwaj, S., Gowing, S., Pearce, K., Jones, D., Kumar, S., Gingrich, M., Ahmadzai, Z., Thavorn, K., Namavarian, A., Mohammed, A., Uddin, S., Behzadi, A., Brar, A., Peters, E., Buduhan, G., Tan, L., Srinathan, S., Levy, J., Ringash, J., Sutradhar, R., Robinson, M., Bednarek, L., Wang, H., MacDonald, D., Graham, K., Enns, S., Tan, A., Bruinooge, A., Poole, E., Pascoe, C., Karakach, T., Halayko, A., Fang, B., Birch, D., Singh, H., Hershorn, O., Hochman, D., Helewa, R., Robertson, R., Cahill, C., Lipson, M., Afzal, A., Maclean, A., Roen, S., Buie, W., Chu, M., Amin, N., Jaffer, H., Rebello, R., Doumouras, A., Hajjar, R., Oliero, M., Cuisiniere, T., Fragoso, G., Calvé, A., Djediai, S., Annabi, B., Richard, C., Santos, M., Zhou, Y., Dodd), S., Ring, B., Yuan, Y., Garfinkle, R., Dell’Aniello, S., Bhatnagar, S., Ghitulescu, G., Faria, J., Brassard, P., Salama, E., Amar-Zifkin, A., Talwar, G., Daniel, R., AlSulaim, H., Alqahtani, M., Al-Masrouri, S., Chen, A., Patel, A., Brissette, V., Al Busaidi, N., Moon, J., Demian, M., MacRae, H., Alam, F., Holland, J., Cwintal, M., Rigas, G., Pang, A., Marinescu, D., Brown, C., Raval, M., Phang, P., Ghuman, A., Li, M., Muncner, S., Mihajlovic, I., Dykstra, M., Snelgrove, R., Monton, O., Smith, A., AlAamer, O., AlSelaim, N., AlMalki, M., Al-osail, A., Ruxton, R., Manuel, P., Mohamed, F., Motamedi, M.K., Serahati, S., Rajendran, L., Phang, T., Caminsky, N., Alavi, K., Paquette, I., MacLean, T., Wexner, S., Steele, S., Patel, S., Bordeianou, L., Sylla, P., Bayat, Z., Kennedy, E., Victor, C., Govindarajan, A., Liang, J., Roy, H., Baig, Z., Karimmudin, A., Gill, D., Ginther, N., Alrashid, F., Wiseman, V., Zhang, L., MacDonald, P., Merchant, S.M., Wattie Barnett, K., Caycedo-Marulanda, A., Patel, S.V., Harra, Z., Hegagi, M., Alghaithi, N., Papillon, E., Kasteel, N., Kaur, G., Bindra, S., Malhotra, A., Graham, C., MacLean, A., Beck, P., Jijon, H., Ferraz, J., Szwimer, R., Merchant, S., Kong, W., Gyawali, B., Hanna, T., Chung, W., Nanji, S., Booth, C., Li, V., Awan, A., Serrano, P., Jacobson, M., Chanco, M., Wen, V., Singh, N., Peiris, L., Pasieka, J., Ghatage, P., Buie, D., Bouchard-Fortier, A., Mack, L., Marini, W., Zheng, W., Swallow, C., Reedijk, M., DiPasquale, A., Prus-Czrnecka, Z., Delmar, L., Gagnon, N., Villiard, R., Martel, É., Cadrin-Chênevert, A., Ledoux, É., Racicot, C., Mysuria), S., Bazzarelli, A., Pao, J., Zhang, M., McKevitt, E., Kuusk, U., Van Laeken, N., Bovill, E., Isaac, K., Dingee, C., Hunter-Smith, A., Cuthbert, C., Fergus, K., Barbera, L., Efegoma, Y., Howell, D., Isherwood, S., Levasseur, N., Scheer, A., Simmons, C., Srikantham, A., Temple-Orberle, C., Xu, Y., Metcalfe, K., Quan, M., Alqaydi, A., la, J., Digby, G., Brind’Amour, A., Sidéris, L., Dubé, P., De Guerke, L., Fortin, S., Auclair, M., Trilling, B., Tremblay, J., Di Lena, É., Hopkins), B., Wong, S., Hopkins, B., Dumitra, S., Mysuria, S., Kapur, H., Bazarelli, A., Cadili, L., DeGirolamo, K., Ng, D., Ali, A., Eymae, D., Lee, K., Brar, S., Conner, J., Magalhaes, M., Allen, K., Baliski, C., Cyr, D., Sari, A., Messenger, D., Driman, D., Assarzadegan, N., Juda, A., Brar, M., Kirsch, R., Lamontagne, A., Gamache, Y., Mardinger, C., Lee, C., Duckworth, R., Brindle, M., Fraulin, F., Austen, L., Kortbeek, J., Hyndman, M., Jamjoum, G., Langer, S., Yuan Xu, Y., Kong, S., Lim, D., Retrouvey, H., Kerrebijn, I., Butler, K., O’Neill, A., Cil, T., Zhong, T., Hofer, S., McCready, D., Look Hong, N., Skipworth, J., Mah, A., Desai, S., Chung, S., Scudamore, C., Segedi, M., Vasilyeva, E., Li, J., Kim, P., Deprato, A., Dajani, K., Gilbert, R., Smoot, R., Tzeng, C., Rocha, F., Yohanathan, L., Cleary, S., Bertens, K., Reyna-Sepulveda, F., Badrudin, D., Gala-Lopez, B., Hanna, N., Wei, X., Kaliwal, Y., Wei, A., Henault, D., Barrette, B., Pelletier, S., Thebault, P., Beaudry-Simoneau, E., Rong, Z., Plasse, M., Dagenais, A. Roy M., Létourneau, R., Lapointe, R., Vandenbroucke-Menu, F., Nguyen, B., Soucy, G., Turcotte, S., Lemke, M., Waugh, E., Quan, D., Skaro, A., Lund, M., Glinka, J., Jada, G., Daza, J., Msallak, H., Zhang, B., Workneh, A., Faisal, S., Faisal, R., Fabbro, M., Gu, C., Claassen, M., Sapisochin, G., Breadner, D., Welch, S., Webb, A., Lester, E., Shapiro, A., Eurich, D., Essaji, Y., Shrader, H., Nayyar, A., Suraju, M., Williams-Perez, S., Ear, P., Chan, C., Smith, V., Rivers-Bowerman, M., Costa, A., Stueck, A., Campbell, N., Allen, S., Mir, Z., Golding, H., McKeown, S., Flemming, J., Groome, P., Djerboua, M., Elbekri, S., Girard, E., Morency-Potvin, P., Dagenais, M., Roy, A., Letourneau, R., Simoneau, E., Zuker, N., Oakley, M., Chartrand, G., Misheva, B., Bendavid, Y., Melland-Smith, M., Smith, L., Tan, J., Kahn, U., McLean, C., Fortin, M., Paré, X., Doyon, A., Keshavjee, S., Schwenger, K., Yadav, J., Fischer, S., Jackson, T., Allard, J., Okrainec, A., Anvari, S., Lovrics, O., Aditya, I., Khondker, A., Walsh, M., Hardy, K., Romanescu, R., Deaninck, F., Linton, J., Fowler-Woods, M., Fowler-Woods, A., Shingoose, G., Zmudzinski, M., Cloutier, Z., Archer, V., Shiroky, J., Abu Halimah, J., Boudreau, V., Marcil, G., Hardy-Henry, A., Lin, W., Hagen, J., and Connell, M.
- Subjects
Abstracts ,Canadian Association of General Surgeons ,Canadian Hernia Society ,Canada ,Canadian Association of Thoracic Surgeons ,Canadian Hepato-Pancreato-Biliary Association ,Humans ,Canadian Society of Surgical Oncology ,Canadian Association of Bariatric Physicians and Surgeons ,Canadian Society of Colon and Rectal Surgeons - Published
- 2022
44. Can Sex Differences in Old Age Disabilities be Attributed to Socioeconomic Conditions? Evidence from a Mapping Review of the Literature
- Author
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Augustsson, E., Rehnberg, Johan, Simmons, C., Rodrigues, R., Kadi, S., Ilinca, S., Phillips, S., Fors, S., Augustsson, E., Rehnberg, Johan, Simmons, C., Rodrigues, R., Kadi, S., Ilinca, S., Phillips, S., and Fors, S.
- Abstract
Old age disabilities are more common among women than men, and adverse socioeconomic conditions are associated with a higher prevalence of disabilities among older adults. The goal of this study was to complete a mapping review of the available evidence assessing the extent to which the observed sex differences in older adults´ disabilities can be attributed to sex differences in socioeconomic status. We searched three databases for articles published between 2009 and 2019, and after screening and looking at eligibility criteria, 6 articles were included in the review. For those studies that did not directly analyse the contribution of socioeconomic conditions, we used the´difference method´ to estimate the proportion of the sex gap in disabilities among older adults that could be attributed to socioeconomic conditions. Our review demonstrated that women generally have a higher prevalence of disabilities than men. In several studies, these differences could be partly attributed to sex differences in the distribution of socioeconomic conditions. We also find great elasticity in the magnitude of both the sex gap in disabilities and in the proportion that could be attributed to differences in socioeconomic conditions.
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- 2022
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45. Classifying conduct disorder using a biopsychosocial model and machine learning method
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Chan, L., Simmons, C., Tillem, S., Conley, M.I., Brazil, I.A., Baskin-Sommers, A.R., Chan, L., Simmons, C., Tillem, S., Conley, M.I., Brazil, I.A., and Baskin-Sommers, A.R.
- Abstract
22 februari 2022, Item does not contain fulltext, Background: Conduct disorder (CD) is a common syndrome with far-reaching effects. Risk factors for the development of CD span social, psychological, and biological domains. Researchers note that predictive models of CD are limited if the focus is on a single risk factor or even a single domain. Machine learning methods are optimized for the extraction of trends across multidomain data but have yet to be implemented in predicting the development of CD. Methods: Social (e.g., family, income), psychological (e.g., psychiatric, neuropsychological), and biological (e.g., resting-state graph metrics) risk factors were measured using data from the baseline visit of the Adolescent Brain Cognitive Development Study when youth were 9 to 10 years old (N = 2368). Applying a feed-forward neural network machine learning method, risk factors were used to predict CD diagnoses 2 years later. Results: A model with factors that included social, psychological, and biological domains outperformed models representing factors within any single domain, predicting the presence of a CD diagnosis with 91.18% accuracy. Within each domain, certain factors stood out in terms of their relationship to CD (social: lower parental monitoring, more aggression in the household, lower income; psychological: greater attention-deficit/hyperactivity disorder and oppositional defiant disorder symptoms, worse crystallized cognition and card sorting performance; biological: disruptions in the topology of subcortical and frontoparietal networks). Conclusions: The development of an accurate, sensitive, and specific predictive model of CD has the potential to aid in prevention and intervention efforts. Key risk factors for CD appear best characterized as reflecting unpredictable, impulsive, deprived, and emotional external and internal contexts.
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- 2022
46. Progress Towards Using a Calcium Ion Trap to Perform Quantum Logic Operations
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Gulley, M. S., Gomez, J. J., Holzscheiter, M. H., James, D. F. V., Kwiat, P. G., Lamoreaux, S. K., Peterson, C. G., Sandberg, V., Schauer, M. M., Simmons, C., Tupa, D., Wang, P., White, A. G., Hughes, R. J., Kumar, P., editor, D’Ariano, G. M., editor, and Hirota, O., editor
- Published
- 2002
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47. Authority Control at the National Archives and Records Administration
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Reid, Lydia J. E. and Simmons, C. Jerry
- Abstract
The National Archives and Records Administration (NARA) launched the Archival Research Catalog (ARC) in 2002. ARC was the first centralized system for describing materials held throughout NARA's nationwide system of archival repositories. ARC's complicated development involved the entire agency, as staff wrestled with years of distinct descriptive practices. NARA evaluated external and internal standards, established a consensus-based decision-making structure, and through teamwork, successfully put into practice shared data structure, data content, and data value standards. This article addresses the selection or creation, implementation, and maintenance of the authority files and thesauri that provide data values for ARC access points to ensure consistent and precise retrieval of archival descriptions. (Contains 22 notes.)
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- 2007
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48. Applications of Californium-252 and the Californium User Facility for Neutron Capture Therapy Research
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Martin, R. C., Alexander, C. W., Simmons, C. M., Marsh, D. L., Hawthorne, M. Frederick, editor, Shelly, Kenneth, editor, and Wiersema, Richard J., editor
- Published
- 2001
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49. Trapped Ion Quantum Computer Research at Los Alamos
- Author
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James, D. F. V., Gulley, M. S., Holzscheiter, M. H., Hughes, R. J., Kwiat, P. G., Lamoreaux, S. K., Peterson, C. G., Sandberg, V. D., Schauer, M. M., Simmons, C. M., Tupa, D., Wang, P. Z., White, A. G., Goos, Gerhard, editor, Hartmanis, Juris, editor, van Leeuwen, Jan, editor, and Williams, Colin P., editor
- Published
- 1999
- Full Text
- View/download PDF
50. Practical Free-Space Quantum Cryptography
- Author
-
Hughes, R. J., Buttler, W. T., Kwiat, P. G., Lamoreaux, S. K., Luther, G. G., Morgan, G. L., Nordholt, J. E., Peterson, C. G., Simmons, C. M., Goos, Gerhard, editor, Hartmanis, Juris, editor, van Leeuwen, Jan, editor, and Williams, Colin P., editor
- Published
- 1999
- Full Text
- View/download PDF
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