Jennifer Ribeiro - Academia.edu (original) (raw)

Uploads

Papers by Jennifer Ribeiro

The integrated and differential cross sections for the production of pairs of isolated photons is... more The integrated and differential cross sections for the production of pairs of isolated photons is measured in proton-proton collisions at a centre-of-mass energy of 7 TeV with the CMS detector at the LHC. A data sample corresponding to an integrated luminosity of 36 pb −1 is analysed. A next-to-leading-order perturbative QCD calculation is compared to the measurements. A discrepancy is observed for regions of the phase space where the two photons have an azimuthal angle difference ∆ϕ 2.8.

Physical Review Letters, 2010

Bose-Einstein correlations have been measured using samples of proton-proton collisions at 0.9 an... more Bose-Einstein correlations have been measured using samples of proton-proton collisions at 0.9 and 2.36 TeV center-of-mass energies, recorded by the CMS experiment at the CERN Large Hadron Collider. The signal is observed in the form of an enhancement of pairs of same-sign charged particles with small relative four-momentum. The size of the correlated particle emission region is seen to increase significantly with the particle multiplicity of the event.

At the current pace of growth and innovation, electronic commerce sites will find it increasingly... more At the current pace of growth and innovation, electronic commerce sites will find it increasingly difficult to give customers the feeling of a personal and directed service that will ultimately make the difference. Content management and personalisation pose some of the most important challenges for online businesses, E-Society, Egovernance and E-government. The increasing need in the design of advanced interactive hypertext systems such as closed corpus (eg multimedia courseware) and open corpus (eg WWW) is for the user to access and manipulate large heterogeneous digitised resource bases efficiently, effectively and comfortably. Research in content management, usability mining, personalisation models and ontologies will crucially underpin the 21st century personal and business computing environment for knowledge discovery, access, manipulation, learning and management. To cope with the massive rates of information exchange in the new digital economy, the emergent IS environment will need to be able to rely on efficient contextually aware navigation, retrieval and transaction systems. These capabilities will have to be made available on both multicasted or on-demand media services, to serve a wide variety of social and business needs such as Electronic and Mobile Learning and Commerce as well as life-long e-foraging for leisure, cultural and general interests by anyone, anywhere through any terminal world-wide. We outline the central technical, social and ethical issues in capturing, managing and interpreting usability data intelligence on the roots of, and the routes to, user (dis)satisfaction. We describe the current technical shortcomings of browser, navigation and traffic management technology. We present our research focus in seeking to take a transformative step towards the development of a new IS persona for computer-aided navigation systems (eg CAIN, Lamas et al '99) or Workflow-embedded document retrieval systems (eg SmartDoc, Badii '97) as integrated with our online usability evaluation systems (PopEval_MB, WebEval_AB, Badii & Murphy '99, Badii, '99b, 2000 a,b,c).

Journal of Affective Disorders

Background: The experience of a sudden urge to jump when in a high place has been speculated to b... more Background: The experience of a sudden urge to jump when in a high place has been speculated to be associated with suicidal ideation; however, scant data has informed this speculation. We termed this experience the high place phenomenon (HPP) and proposed that it stems from a misinterpreted safety signal (i.e., survival instinct). The present study aimed to assess the prevalence of the HPP, to provide evidence that the phenomenon is not exclusive to suicide ideators, and to explore the role of anxiety sensitivity in the phenomenon. Methods: 431 undergraduate college students completed online measures of lifetime frequency of experiencing the HPP, suicidal ideation, anxiety sensitivity, depressive symptoms, and history of mood episodes. Results: The HPP was commonly reported in the general population, even among participants with no history of suicidal ideation. There was a significant correlation between anxiety sensitivity and the HPP, and this relationship was moderated by level of current suicidal ideation. Particularly, the relationship between anxiety sensitivity and the HPP was potentiated among participants with low levels of suicidal ideation. Limitations: The cross-sectional design of the study limits the strength of the conclusions that can be drawn. Conclusions: The HPP is commonly experienced among suicide ideators and non-ideators alike. Thus, individuals who report experiencing the phenomenon are not necessarily suicidal; rather, the experience of HPP may reflect their sensitivity to internal cues and actually affirm their will to live.

Abstract The Computer Aided Information Navigation project provides a new method of adaptive navi... more Abstract The Computer Aided Information Navigation project provides a new method of adaptive navigation support which aims to increase the World Wide Web's value as a pedagogical tool. This work approaches adaptive hypertext systems, metadata, computer supported co-operative work and recommender systems. The project extends and combines work from these areas in a new way to support learning and initial research tasks by facilitating the navigation process, providing a Rough Guide-like weak hypertext ...

Search for the standard model Higgs boson in the H → ZZ → 2 2ν channel in pp collisions at √ s = ... more Search for the standard model Higgs boson in the H → ZZ → 2 2ν channel in pp collisions at √ s = 7 TeV

Measurement of the Z/γ * + b-jet cross section in pp collisions at √ s = 7 TeV

Journal of Comparative Neurology, 2009

The skin is innervated by two populations of unmyelinated sensory fibers, the peptidergic and non... more The skin is innervated by two populations of unmyelinated sensory fibers, the peptidergic and nonpeptidergic, which transmit nociceptive information to the central nervous system. The peptidergic population expresses neuropeptides such as substance P (SP) and calcitonin gene-related peptide (CGRP) and has both cutaneous and visceral targets. The nonpeptidergic population expresses the purinergic receptor P2X3, binds the isolectin B4 (IB4), and innervates mainly the epidermis. To date, the peptidergic nociceptor population in cutaneous tissue of the rat has been well characterized, whereas the nonpeptidergic innervation pattern has lacked an adequate description. To this aim, we used light microscopic immunocytochemistry to investigate the pattern of P2X3-immunoreactive (-IR) fiber innervation of both hairy and glabrous skin from male Sprague-Dawley rats. Our results show extensive P2X3-IR fibers throughout the upper and lower dermis. Thick bundles of P2X3-IR fibers were found to run in parallel with the dermal-epidermal junction and projected multiple thin collateral axons that penetrated the epidermal layer, creating a dense network of innervation throughout the entire epidermis. The distribution of P2X3-IR fibers in the epidermis was far more extensive than the distribution of CGRP-IR fibers. P2X3-IR fibers also innervate hair follicles but were rarely found in close proximity to glands and blood vessels. The present results suggest a primary role for P2X3-IR fibers in the detection of noxious stimuli in cutaneous tissue and provide an anatomical basis for future studies examining a possible functionally distinct role of nonpeptidergic nociceptors in the transmission of nociceptive signals. J. Comp. Neurol. 514:555–566, 2009. © 2009 Wiley-Liss, Inc.

Clinics in Liver Disease, 2003

The integrated and differential cross sections for the production of pairs of isolated photons is... more The integrated and differential cross sections for the production of pairs of isolated photons is measured in proton-proton collisions at a centre-of-mass energy of 7 TeV with the CMS detector at the LHC. A data sample corresponding to an integrated luminosity of 36 pb −1 is analysed. A next-to-leading-order perturbative QCD calculation is compared to the measurements. A discrepancy is observed for regions of the phase space where the two photons have an azimuthal angle difference ∆ϕ 2.8.

Physical Review Letters, 2010

Bose-Einstein correlations have been measured using samples of proton-proton collisions at 0.9 an... more Bose-Einstein correlations have been measured using samples of proton-proton collisions at 0.9 and 2.36 TeV center-of-mass energies, recorded by the CMS experiment at the CERN Large Hadron Collider. The signal is observed in the form of an enhancement of pairs of same-sign charged particles with small relative four-momentum. The size of the correlated particle emission region is seen to increase significantly with the particle multiplicity of the event.

At the current pace of growth and innovation, electronic commerce sites will find it increasingly... more At the current pace of growth and innovation, electronic commerce sites will find it increasingly difficult to give customers the feeling of a personal and directed service that will ultimately make the difference. Content management and personalisation pose some of the most important challenges for online businesses, E-Society, Egovernance and E-government. The increasing need in the design of advanced interactive hypertext systems such as closed corpus (eg multimedia courseware) and open corpus (eg WWW) is for the user to access and manipulate large heterogeneous digitised resource bases efficiently, effectively and comfortably. Research in content management, usability mining, personalisation models and ontologies will crucially underpin the 21st century personal and business computing environment for knowledge discovery, access, manipulation, learning and management. To cope with the massive rates of information exchange in the new digital economy, the emergent IS environment will need to be able to rely on efficient contextually aware navigation, retrieval and transaction systems. These capabilities will have to be made available on both multicasted or on-demand media services, to serve a wide variety of social and business needs such as Electronic and Mobile Learning and Commerce as well as life-long e-foraging for leisure, cultural and general interests by anyone, anywhere through any terminal world-wide. We outline the central technical, social and ethical issues in capturing, managing and interpreting usability data intelligence on the roots of, and the routes to, user (dis)satisfaction. We describe the current technical shortcomings of browser, navigation and traffic management technology. We present our research focus in seeking to take a transformative step towards the development of a new IS persona for computer-aided navigation systems (eg CAIN, Lamas et al '99) or Workflow-embedded document retrieval systems (eg SmartDoc, Badii '97) as integrated with our online usability evaluation systems (PopEval_MB, WebEval_AB, Badii & Murphy '99, Badii, '99b, 2000 a,b,c).

Journal of Affective Disorders

Background: The experience of a sudden urge to jump when in a high place has been speculated to b... more Background: The experience of a sudden urge to jump when in a high place has been speculated to be associated with suicidal ideation; however, scant data has informed this speculation. We termed this experience the high place phenomenon (HPP) and proposed that it stems from a misinterpreted safety signal (i.e., survival instinct). The present study aimed to assess the prevalence of the HPP, to provide evidence that the phenomenon is not exclusive to suicide ideators, and to explore the role of anxiety sensitivity in the phenomenon. Methods: 431 undergraduate college students completed online measures of lifetime frequency of experiencing the HPP, suicidal ideation, anxiety sensitivity, depressive symptoms, and history of mood episodes. Results: The HPP was commonly reported in the general population, even among participants with no history of suicidal ideation. There was a significant correlation between anxiety sensitivity and the HPP, and this relationship was moderated by level of current suicidal ideation. Particularly, the relationship between anxiety sensitivity and the HPP was potentiated among participants with low levels of suicidal ideation. Limitations: The cross-sectional design of the study limits the strength of the conclusions that can be drawn. Conclusions: The HPP is commonly experienced among suicide ideators and non-ideators alike. Thus, individuals who report experiencing the phenomenon are not necessarily suicidal; rather, the experience of HPP may reflect their sensitivity to internal cues and actually affirm their will to live.

Abstract The Computer Aided Information Navigation project provides a new method of adaptive navi... more Abstract The Computer Aided Information Navigation project provides a new method of adaptive navigation support which aims to increase the World Wide Web's value as a pedagogical tool. This work approaches adaptive hypertext systems, metadata, computer supported co-operative work and recommender systems. The project extends and combines work from these areas in a new way to support learning and initial research tasks by facilitating the navigation process, providing a Rough Guide-like weak hypertext ...

Search for the standard model Higgs boson in the H → ZZ → 2 2ν channel in pp collisions at √ s = ... more Search for the standard model Higgs boson in the H → ZZ → 2 2ν channel in pp collisions at √ s = 7 TeV

Measurement of the Z/γ * + b-jet cross section in pp collisions at √ s = 7 TeV

Journal of Comparative Neurology, 2009

The skin is innervated by two populations of unmyelinated sensory fibers, the peptidergic and non... more The skin is innervated by two populations of unmyelinated sensory fibers, the peptidergic and nonpeptidergic, which transmit nociceptive information to the central nervous system. The peptidergic population expresses neuropeptides such as substance P (SP) and calcitonin gene-related peptide (CGRP) and has both cutaneous and visceral targets. The nonpeptidergic population expresses the purinergic receptor P2X3, binds the isolectin B4 (IB4), and innervates mainly the epidermis. To date, the peptidergic nociceptor population in cutaneous tissue of the rat has been well characterized, whereas the nonpeptidergic innervation pattern has lacked an adequate description. To this aim, we used light microscopic immunocytochemistry to investigate the pattern of P2X3-immunoreactive (-IR) fiber innervation of both hairy and glabrous skin from male Sprague-Dawley rats. Our results show extensive P2X3-IR fibers throughout the upper and lower dermis. Thick bundles of P2X3-IR fibers were found to run in parallel with the dermal-epidermal junction and projected multiple thin collateral axons that penetrated the epidermal layer, creating a dense network of innervation throughout the entire epidermis. The distribution of P2X3-IR fibers in the epidermis was far more extensive than the distribution of CGRP-IR fibers. P2X3-IR fibers also innervate hair follicles but were rarely found in close proximity to glands and blood vessels. The present results suggest a primary role for P2X3-IR fibers in the detection of noxious stimuli in cutaneous tissue and provide an anatomical basis for future studies examining a possible functionally distinct role of nonpeptidergic nociceptors in the transmission of nociceptive signals. J. Comp. Neurol. 514:555–566, 2009. © 2009 Wiley-Liss, Inc.

Clinics in Liver Disease, 2003