Self-efficacy was experimentally manipulated in an exercise context, and its effect on affective ... more Self-efficacy was experimentally manipulated in an exercise context, and its effect on affective responses was examined. College women (N = 46) were randomly assigned to a high- or low-efficacy condition, and efficacy expectations were manipulated by means of bogus feedback and graphs depicting contrived normative data. The manipulation successfully influenced affective responses, with participants in the high-efficacy group reporting more positive and less negative affect than did the low-efficacy group. Efficacy was significantly related to feeling-state responses during and after activity but only in the high-efficacy condition. The results suggest that self-efficacy can be manipulated and that these changes are related to the affective experience associated with exercise. Such findings may have important implications for the roles played by self-efficacy and affect in exercise adherence.
A measurement of the Z/γ⁎Z/γ⁎ transverse momentum (pTZ) distribution in proton–proton collisions ... more A measurement of the Z/γ⁎Z/γ⁎ transverse momentum (pTZ) distribution in proton–proton collisions at s=7 TeV is presented using Z/γ⁎→e+e−Z/γ⁎→e+e− and Z/γ⁎→μ+μ−Z/γ⁎→μ+μ− decays collected with the ATLAS detector in data sets with integrated luminosities of 35 pb−1 and 40 pb−1, respectively. The normalized differential cross sections are measured separately for electron and muon decay channels as well as for their combination up to pTZ of 350 GeV for invariant dilepton masses 66 GeV<mℓℓ<116 GeV66 GeV<mℓℓ<116 GeV. The measurement is compared to predictions of perturbative QCD and various event generators. The prediction of resummed QCD combined with fixed order perturbative QCD is found to be in good agreement with the data.
A multithreaded software application was developed by Jet Propulsion Lab (JPL) to collect a set o... more A multithreaded software application was developed by Jet Propulsion Lab (JPL) to collect a set of correlated imagery, Inertial Measurement Unit (IMU) and GPS data for a Wallops Flight Facility (WFF) sounding rocket flight. The data set will be used to advance Terrain Relative Navigation (TRN) technology algorithms being researched at JPL. This paper describes the software architecture and the tests used to meet the timing and data rate requirements for the software used to collect the dataset. Also discussed are the challenges of using commercial off the shelf (COTS) flight hardware and open source software. This includes multiple Camera Link (C-link) based cameras, a Pentium-M based computer, and Linux Fedora 11 operating system. Additionally, the paper talks about the history of the software architecture's usage in other JPL projects and its applicability for future missions, such as cubesats, UAVs, and research planes/balloons. Also talked about will be the human aspect of project especially JPL's Phaeton program and the results of the launch.
In this poster we present preliminary results from a field experiment in which we estimate a seis... more In this poster we present preliminary results from a field experiment in which we estimate a seismic Green's function using a passive array of surface and down hole geophones. The source of seismic excitation is vehicle traffic on a nearby access road. Traffic on the road is modeled as a continuous line source. The estimated Green's function is compared to Green's functions derived from conventional seismic data collected using known sources. Once the earth model has been established, we use it to re-interpret the data and attempt to recover the signatures of individual vehicles. Our goal is to develop a technology for the simultaneous detection of underground tunnels and bunkers and traffic monitoring near these structures. We are developing a methodology for fast inversion of seismic data based on computer learning using Support Vector Machines.
Jet cross sections have been measured for the first time in proton-proton collisions at a centre-... more Jet cross sections have been measured for the first time in proton-proton collisions at a centre-of-mass energy of 7 TeV using the ATLAS detector. The measurement uses an integrated luminosity of 17 nb−1 recorded at the Large Hadron Collider. The anti-k t algorithm is used to identify jets, with two jet resolution parameters, R=0.4 and 0.6. The dominant uncertainty comes from the jet energy scale, which is determined to within 7% for central jets above 60 GeV transverse momentum. Inclusive single-jet differential cross sections are presented as functions of jet transverse momentum and rapidity. Dijet cross sections are presented as functions of dijet mass and the angular variable χ. The results are compared to expectations based on next-to-leading-order QCD, which agree with the data, providing a validation of the theory in a new kinematic regime.
Self-efficacy was experimentally manipulated in an exercise context, and its effect on affective ... more Self-efficacy was experimentally manipulated in an exercise context, and its effect on affective responses was examined. College women (N = 46) were randomly assigned to a high- or low-efficacy condition, and efficacy expectations were manipulated by means of bogus feedback and graphs depicting contrived normative data. The manipulation successfully influenced affective responses, with participants in the high-efficacy group reporting more positive and less negative affect than did the low-efficacy group. Efficacy was significantly related to feeling-state responses during and after activity but only in the high-efficacy condition. The results suggest that self-efficacy can be manipulated and that these changes are related to the affective experience associated with exercise. Such findings may have important implications for the roles played by self-efficacy and affect in exercise adherence.
A measurement of the Z/γ⁎Z/γ⁎ transverse momentum (pTZ) distribution in proton–proton collisions ... more A measurement of the Z/γ⁎Z/γ⁎ transverse momentum (pTZ) distribution in proton–proton collisions at s=7 TeV is presented using Z/γ⁎→e+e−Z/γ⁎→e+e− and Z/γ⁎→μ+μ−Z/γ⁎→μ+μ− decays collected with the ATLAS detector in data sets with integrated luminosities of 35 pb−1 and 40 pb−1, respectively. The normalized differential cross sections are measured separately for electron and muon decay channels as well as for their combination up to pTZ of 350 GeV for invariant dilepton masses 66 GeV<mℓℓ<116 GeV66 GeV<mℓℓ<116 GeV. The measurement is compared to predictions of perturbative QCD and various event generators. The prediction of resummed QCD combined with fixed order perturbative QCD is found to be in good agreement with the data.
A multithreaded software application was developed by Jet Propulsion Lab (JPL) to collect a set o... more A multithreaded software application was developed by Jet Propulsion Lab (JPL) to collect a set of correlated imagery, Inertial Measurement Unit (IMU) and GPS data for a Wallops Flight Facility (WFF) sounding rocket flight. The data set will be used to advance Terrain Relative Navigation (TRN) technology algorithms being researched at JPL. This paper describes the software architecture and the tests used to meet the timing and data rate requirements for the software used to collect the dataset. Also discussed are the challenges of using commercial off the shelf (COTS) flight hardware and open source software. This includes multiple Camera Link (C-link) based cameras, a Pentium-M based computer, and Linux Fedora 11 operating system. Additionally, the paper talks about the history of the software architecture's usage in other JPL projects and its applicability for future missions, such as cubesats, UAVs, and research planes/balloons. Also talked about will be the human aspect of project especially JPL's Phaeton program and the results of the launch.
In this poster we present preliminary results from a field experiment in which we estimate a seis... more In this poster we present preliminary results from a field experiment in which we estimate a seismic Green's function using a passive array of surface and down hole geophones. The source of seismic excitation is vehicle traffic on a nearby access road. Traffic on the road is modeled as a continuous line source. The estimated Green's function is compared to Green's functions derived from conventional seismic data collected using known sources. Once the earth model has been established, we use it to re-interpret the data and attempt to recover the signatures of individual vehicles. Our goal is to develop a technology for the simultaneous detection of underground tunnels and bunkers and traffic monitoring near these structures. We are developing a methodology for fast inversion of seismic data based on computer learning using Support Vector Machines.
Jet cross sections have been measured for the first time in proton-proton collisions at a centre-... more Jet cross sections have been measured for the first time in proton-proton collisions at a centre-of-mass energy of 7 TeV using the ATLAS detector. The measurement uses an integrated luminosity of 17 nb−1 recorded at the Large Hadron Collider. The anti-k t algorithm is used to identify jets, with two jet resolution parameters, R=0.4 and 0.6. The dominant uncertainty comes from the jet energy scale, which is determined to within 7% for central jets above 60 GeV transverse momentum. Inclusive single-jet differential cross sections are presented as functions of jet transverse momentum and rapidity. Dijet cross sections are presented as functions of dijet mass and the angular variable χ. The results are compared to expectations based on next-to-leading-order QCD, which agree with the data, providing a validation of the theory in a new kinematic regime.
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Papers by Heidy Martinez