188 research outputs found

    Adnexal mass with extremely high levels of CA-125 and CA19-9 but normal Human Epididymis Protein 4 (HE4) and Risk of Ovarian Malignancy Algorithm (ROMA): Endometriosis or ovarian malignancy? A case report

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    Background: It has been shown that Carbohydrate antigen (CA) 125 and CA 19-9 tumor markers are useful for diagnosis and follow up of ovarian carcinoma. Case: In this case, we reported the high level of CA-125 and CA 19-9 with large right ovarian intact endometrioma and extensive involvement of omentum. Conclusion: Human Epididymis protein (HE4) and Risk of ovarian malignancy algorithm (ROMA) can be useful in differentiation between malignancies and benign pathologies with a good sensitivity and specificity value. © 2018, Research and Clinical Center for Infertitlity. All rights reserved

    Crack paths under mixed mode loading

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    Long fatigue cracks that initially experience mixed mode displacements usually change direction in response to cyclic elastic stresses. Eventually the cracks tend to orient themselves into a pure mode I condition, but the path that they take can be complex and chaotic. In this paper, we report on recent developments in techniques for tracking the crack path as it grows and evaluating the strength of the mixed mode crack tip stress field

    Accommodative insufficiency in a student population in Iran Insuficiencia acomodativa en una población estudiantil de Irán

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    Purpose: To determine the prevalence of accommodative insufficiency (AI) and its relation with age, gender, and refractive errors in a college-age student population in Iran. Methods: The present study was conducted cross-sectionally in 2017. All students had optometric tests including measurement of visual acuity, objective and subjective refraction, as well as binocular vision and accommodative examinations. Amplitude of accommodation was measured with the Donders� push-up method using the Royal Air Force (RAF) rule. Monocular accommodative facility was measured with ±2.00 diopter flipper lenses. The accommodative response was tested using dynamic retinoscopy with the monocular estimation method (MEM). Results: The prevalence of AI in the studied population was 4.07 (95 CI: 2.61�5.52). The rate was 6.04 (95 CI: 3.58�8.50) in females and 2.01 (95 CI: 0.53�3.48) in males, and logistic regression showed a significantly higher odds of AI in females (OR = 3.14, 95 CI: 1.33�7.45, p-value = 0.009). The prevalence of AI was 2.59 (95 CI: 0.55�7.56) in the 18�19-year-old age group and 4.08 (95 CI: 0.09�8.07) in the 24�25-year-old group (p-value = 0.848). The prevalence of AI among emmetropic, myopic, and hyperopic individuals was 3.74 (95 CI: 1.88�5.61), 4.44 (95 CI: 2.07�6.81), and 5.26 (95 CI: 4.79�16.32), respectively (p-value = 0.869). In the multiple regression model, only gender showed significant relationship with AI (Odds ratio = 3.14, 95 CI: 1.33�7.45; p-values = 0.009). Conclusion: The prevalence of AI in the present study is lower than the most prevalence rates reported in previous studies. In the present study, gender and AI showed a strong association, such that AI prevalence was significantly higher in females than males. © 2018 Spanish General Council of Optometr

    Accommodative insufficiency in a student population in Iran Insuficiencia acomodativa en una población estudiantil de Irán

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    Purpose: To determine the prevalence of accommodative insufficiency (AI) and its relation with age, gender, and refractive errors in a college-age student population in Iran. Methods: The present study was conducted cross-sectionally in 2017. All students had optometric tests including measurement of visual acuity, objective and subjective refraction, as well as binocular vision and accommodative examinations. Amplitude of accommodation was measured with the Donders� push-up method using the Royal Air Force (RAF) rule. Monocular accommodative facility was measured with ±2.00 diopter flipper lenses. The accommodative response was tested using dynamic retinoscopy with the monocular estimation method (MEM). Results: The prevalence of AI in the studied population was 4.07 (95 CI: 2.61�5.52). The rate was 6.04 (95 CI: 3.58�8.50) in females and 2.01 (95 CI: 0.53�3.48) in males, and logistic regression showed a significantly higher odds of AI in females (OR = 3.14, 95 CI: 1.33�7.45, p-value = 0.009). The prevalence of AI was 2.59 (95 CI: 0.55�7.56) in the 18�19-year-old age group and 4.08 (95 CI: 0.09�8.07) in the 24�25-year-old group (p-value = 0.848). The prevalence of AI among emmetropic, myopic, and hyperopic individuals was 3.74 (95 CI: 1.88�5.61), 4.44 (95 CI: 2.07�6.81), and 5.26 (95 CI: 4.79�16.32), respectively (p-value = 0.869). In the multiple regression model, only gender showed significant relationship with AI (Odds ratio = 3.14, 95 CI: 1.33�7.45; p-values = 0.009). Conclusion: The prevalence of AI in the present study is lower than the most prevalence rates reported in previous studies. In the present study, gender and AI showed a strong association, such that AI prevalence was significantly higher in females than males. © 2018 Spanish General Council of Optometr

    Accommodative insufficiency in a student population in Iran Insuficiencia acomodativa en una población estudiantil de Irán

    Get PDF
    Purpose: To determine the prevalence of accommodative insufficiency (AI) and its relation with age, gender, and refractive errors in a college-age student population in Iran. Methods: The present study was conducted cross-sectionally in 2017. All students had optometric tests including measurement of visual acuity, objective and subjective refraction, as well as binocular vision and accommodative examinations. Amplitude of accommodation was measured with the Donders� push-up method using the Royal Air Force (RAF) rule. Monocular accommodative facility was measured with ±2.00 diopter flipper lenses. The accommodative response was tested using dynamic retinoscopy with the monocular estimation method (MEM). Results: The prevalence of AI in the studied population was 4.07 (95 CI: 2.61�5.52). The rate was 6.04 (95 CI: 3.58�8.50) in females and 2.01 (95 CI: 0.53�3.48) in males, and logistic regression showed a significantly higher odds of AI in females (OR = 3.14, 95 CI: 1.33�7.45, p-value = 0.009). The prevalence of AI was 2.59 (95 CI: 0.55�7.56) in the 18�19-year-old age group and 4.08 (95 CI: 0.09�8.07) in the 24�25-year-old group (p-value = 0.848). The prevalence of AI among emmetropic, myopic, and hyperopic individuals was 3.74 (95 CI: 1.88�5.61), 4.44 (95 CI: 2.07�6.81), and 5.26 (95 CI: 4.79�16.32), respectively (p-value = 0.869). In the multiple regression model, only gender showed significant relationship with AI (Odds ratio = 3.14, 95 CI: 1.33�7.45; p-values = 0.009). Conclusion: The prevalence of AI in the present study is lower than the most prevalence rates reported in previous studies. In the present study, gender and AI showed a strong association, such that AI prevalence was significantly higher in females than males. © 2018 Spanish General Council of Optometr

    A New Solution to the Relative Orientation Problem using only 3 Points and the Vertical Direction

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    This paper presents a new method to recover the relative pose between two images, using three points and the vertical direction information. The vertical direction can be determined in two ways: 1- using direct physical measurement like IMU (inertial measurement unit), 2- using vertical vanishing point. This knowledge of the vertical direction solves 2 unknowns among the 3 parameters of the relative rotation, so that only 3 homologous points are requested to position a couple of images. Rewriting the coplanarity equations leads to a simpler solution. The remaining unknowns resolution is performed by an algebraic method using Grobner bases. The elements necessary to build a specific algebraic solver are given in this paper, allowing for a real-time implementation. The results on real and synthetic data show the efficiency of this method

    Search for the standard model Higgs boson decaying into two photons in pp collisions at sqrt(s)=7 TeV

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    A search for a Higgs boson decaying into two photons is described. The analysis is performed using a dataset recorded by the CMS experiment at the LHC from pp collisions at a centre-of-mass energy of 7 TeV, which corresponds to an integrated luminosity of 4.8 inverse femtobarns. Limits are set on the cross section of the standard model Higgs boson decaying to two photons. The expected exclusion limit at 95% confidence level is between 1.4 and 2.4 times the standard model cross section in the mass range between 110 and 150 GeV. The analysis of the data excludes, at 95% confidence level, the standard model Higgs boson decaying into two photons in the mass range 128 to 132 GeV. The largest excess of events above the expected standard model background is observed for a Higgs boson mass hypothesis of 124 GeV with a local significance of 3.1 sigma. The global significance of observing an excess with a local significance greater than 3.1 sigma anywhere in the search range 110-150 GeV is estimated to be 1.8 sigma. More data are required to ascertain the origin of this excess.Comment: Submitted to Physics Letters

    Search for a W' boson decaying to a bottom quark and a top quark in pp collisions at sqrt(s) = 7 TeV

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    Results are presented from a search for a W' boson using a dataset corresponding to 5.0 inverse femtobarns of integrated luminosity collected during 2011 by the CMS experiment at the LHC in pp collisions at sqrt(s)=7 TeV. The W' boson is modeled as a heavy W boson, but different scenarios for the couplings to fermions are considered, involving both left-handed and right-handed chiral projections of the fermions, as well as an arbitrary mixture of the two. The search is performed in the decay channel W' to t b, leading to a final state signature with a single lepton (e, mu), missing transverse energy, and jets, at least one of which is tagged as a b-jet. A W' boson that couples to fermions with the same coupling constant as the W, but to the right-handed rather than left-handed chiral projections, is excluded for masses below 1.85 TeV at the 95% confidence level. For the first time using LHC data, constraints on the W' gauge coupling for a set of left- and right-handed coupling combinations have been placed. These results represent a significant improvement over previously published limits.Comment: Submitted to Physics Letters B. Replaced with version publishe

    Measurement of isolated photon production in pp and PbPb collisions at sqrt(sNN) = 2.76 TeV

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    Isolated photon production is measured in proton-proton and lead-lead collisions at nucleon-nucleon centre-of-mass energies of 2.76 TeV in the pseudorapidity range |eta|<1.44 and transverse energies ET between 20 and 80 GeV with the CMS detector at the LHC. The measured ET spectra are found to be in good agreement with next-to-leading-order perturbative QCD predictions. The ratio of PbPb to pp isolated photon ET-differential yields, scaled by the number of incoherent nucleon-nucleon collisions, is consistent with unity for all PbPb reaction centralities.Comment: Submitted to Physics Letters
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