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Search Results: 1 - 10 of 213531 matches for " Jennifer L. Weinstein "
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Jealousy Induction Methods, Sex, and the Big-5 Personality Dimensions  [PDF]
Jennifer L. Weinstein, T. Joel Wade
Psychology (PSYCH) , 2011, DOI: 10.4236/psych.2011.25080
Abstract: One-hundred and twenty five participants were administered an online survey to investigate: which type of cheating, emotional or sexual, is more likely to be used in an attempt to induce jealousy in a partner, which type of cheating is perceived as most effective for inducing jealousy, and whether or not the Big-5 personality dimensions are related to the choice of jealousy induction technique. Emotional cheating was hypothesized to be selected more often, and given a higher effectiveness rating, than physical cheating for inducing jealousy in a partner. Additionally, men were hypothesized to rate physical cheating as worse than emotional cheating while women were expected to rate emotional cheating as more hurtful. The results were partially consistent with the hypotheses. Emotional cheating was selected as the method to induce jealousy most often and was rated as the most effective way to induce jealousy. However, physical cheating was rated as more upsetting by both men and women. Additionally, Big-5 personality dimensions were not related to choice of jealousy induction method or reactions to physical or emotional cheating. The findings are discussed in relation to prior research.
Potential Moderators of Physical Activity on Brain Health
Regina L. Leckie,Andrea M. Weinstein,Jennifer C. Hodzic,Kirk I. Erickson
Journal of Aging Research , 2012, DOI: 10.1155/2012/948981
Abstract:
Potential Moderators of Physical Activity on Brain Health
Regina L. Leckie,Andrea M. Weinstein,Jennifer C. Hodzic,Kirk I. Erickson
Journal of Aging Research , 2012, DOI: 10.1155/2012/948981
Abstract: Age-related cognitive decline is linked to numerous molecular, structural, and functional changes in the brain. However, physical activity is a promising method of reducing unfavorable age-related changes. Physical activity exerts its effects on the brain through many molecular pathways, some of which are regulated by genetic variants in humans. In this paper, we highlight genes including apolipoprotein E (APOE), brain derived neurotrophic factor (BDNF), and catechol-O-methyltransferase (COMT) along with dietary omega-3 fatty acid, docosahexaenoic acid (DHA), as potential moderators of the effect of physical activity on brain health. There are a growing number of studies indicating that physical activity might mitigate the genetic risks for disease and brain dysfunction and that the combination of greater amounts of DHA intake with physical activity might promote better brain function than either treatment alone. Understanding whether genes or other lifestyles moderate the effects of physical activity on neurocognitive health is necessary for delineating the pathways by which brain health can be enhanced and for grasping the individual variation in the effectiveness of physical activity interventions on the brain and cognition. There is a need for future research to continue to assess the factors that moderate the effects of physical activity on neurocognitive function. 1. Introduction One in every eight US seniors over the age of 65 has been diagnosed with Alzheimer’s disease (AD), amounting to more than 5.4 million people. With the aging baby boomers, this number is predicted to double by 2050 [1]. Unfortunately, pharmaceuticals have had limited success in preventing or treating age-related cognitive dysfunction, such as AD or even normal cognitive aging. Fortunately, physical activity appears to be a promising nonpharmaceutical method to attenuate cognitive dysfunction in late life [2, 3]. Yet, there remain many unanswered questions about the effectiveness of physical activity to improve brain health, prevent dementia, and reduce age-related cognitive decline. “Physical activity” is an umbrella term defined by the Center for Disease Control (CDC) as any activity that increases heart rate and energy expenditure from one’s basal level [4]. Examples of physical activities are walking, gardening, or even household chores such as cleaning. In turn, “exercise” is defined as a subcategory of physical activity, being any structured or repetitive activity that aims to improve fitness, endurance, or health such as strength training, purposefully running, or
The Impact of Cervical Cancer Treatment on Sexual Function and Intimate Relationships: Is Anyone Listening?  [PDF]
Jennifer L. Hunter
Open Journal of Obstetrics and Gynecology (OJOG) , 2014, DOI: 10.4236/ojog.2014.48069
Abstract:

The purpose of this research was to describe women’s narrative accounts of the impact of cervical cancer treatment on their sexual function and intimate relationships, and to evaluate what changes in care and education are needed to enhance quality of life and intimacy after treatment. The research approach was a narrative design, using semi-structured, in-depth interviews. Narratives were examined within and across interviews, and thematic content analysis completed. The study was done in a gynecologic oncology clinic at a public hospital in the Midwest United States. The sample consisted of twelve women, ranging in age from 27 to 59, who had completed the cervical cancer treatment with chemo-radiation or radiation and surgery, and were now followed by their gynecologic oncologists. Across narratives, five major themes were identified, including unexpected physical complications, not “getting back to normal,” emotional pain and isolation, lack of available information, and inadequate health care provider response to treatment complications and sexual relationship problems. Women’s stories reveal that sex and intimacy issues for cervical cancer survivors remain within a culture of silence. In many situations, health professionals did not provide information that realistically prepared women and partners for probable consequences of treatment, did not assess sexual issues before or after treatment, did not recognize various symptoms as being complications of cancer treatment, did not make referrals, and/or recognized complications, but accepted them as “normal” and without solution. Ethical implications for health professionals and the need for education, communication, and the development of new lines of research are discussed.

NN Correlations Measured in 3He(e,e'pp)n
L. B. Weinstein,R. Niyazov
Physics , 2002, DOI: 10.1140/epja/i2002-10187-4
Abstract: We have measured the $^3$He(e,e$'$pp)n{} reaction in the Jefferson Lab CLAS with 2.2 and 4.4 GeV electrons. We looked at the energy distribution of events with all three nucleons at high momentum (p > 250 MeV/c). This distribution has peaks where two nucleons each have 20% or less of the energy transfer (ie: the third or `leading' nucleon carries most of the kinetic energy). The angular distribution of these two `fast' nucleons shows a very large back-to-back peak, indicating the effect of correlations. While there is some theoretical disagreement, experimental evidence, plus calculations at lower energy by W. Glockle, indicates that these events are primarily sensitive to NN correlations.
Numerical Solution of Differential Equations by Direct Taylor Expansion  [PDF]
Pirooz Mohazzabi, Jennifer L. Becker
Journal of Applied Mathematics and Physics (JAMP) , 2017, DOI: 10.4236/jamp.2017.53053
Abstract: A variation of the direct Taylor expansion algorithm is suggested and applied to several linear and nonlinear differential equations of interest in physics and engineering, and the results are compared with those obtained from other algorithms. It is shown that the suggested algorithm competes strongly with other existing algorithms, both in accuracy and ease of application, while demanding a shorter computation time.
New data strengthen the connection between Short Range Correlations and the EMC effect
O. Hen,E. Piasetzky,L. B. Weinstein
Physics , 2012, DOI: 10.1103/PhysRevC.85.047301
Abstract: Recently published measurements of the two nucleon short range correlation ($NN$-SRC) scaling factors, $a_2(A/d)$, strengthen the previously observed correlation between the magnitude of the EMC effect measured in electron deep inelastic scattering at $0.35\le x_B\le 0.7$ and the SRC scaling factor measured at $x_B \ge 1$. The new results have improved precision and include previously unmeasured nuclei. The measurements of $a_2(A/d)$ for $^9$Be and $^{197}$Au agree with published predictions based on the EMC-SRC correlation. This paper examines the effects of the new data and of different corrections to the data on the slope and quality of the EMC-SRC correlation, the size of the extracted deuteron IMC effect, and the free neutron structure function. The results show that the linear EMC-SRC correlation is robust and that the slope of the correlation is insensitive to most combinations of corrections examined in this work. This strengthens the interpretation that both $NN$-SRC and the EMC effect are related to high momentum nucleons in the nucleus.
Waves in Honeycomb Structures
Charles L. Fefferman,Michael I. Weinstein
Physics , 2012,
Abstract: We review recent work of the authors on the non-relativistic Schr\"odinger equation with a honeycomb lattice potential, $V$. In particular, we summarize results on (i) the existence of Dirac points, conical singularities in dispersion surfaces of $H_V=-\Delta+V$ and (ii) the two-dimensional Dirac equations, as a large, but finite time, effective description of $e^{-iH_Vt}\psi_0$, for data $\psi_0$, which is spectrally localized at a Dirac point. We conclude with a formal derivation and discussion of the effective large time evolution for the nonlinear Schr\"odinger - Gross Pitaevskii equation for small amplitude initial conditions, $\psi_0$. The effective dynamics are governed by a nonlinear Dirac system.
Disentangling the EMC Effect
E. Piasetzky,O. Hen,L. B. Weinstein
Physics , 2012, DOI: 10.1063/1.4826792
Abstract: The deep inelastic scattering cross section for scattering from bound nucleons differs from that of free nucleons.This phenomena, first discovered 30 years ago, is known as the EMC effect and is still not fully understood. Recent analysis of world data showed that the strength of the EMC effect is linearly correlated with the relative amount of Two-Nucleon Short Range Correlated pairs (2N-SRC) in nuclei. The latter are pairs of nucleons whose wave functions overlap, giving them large relative momentum and low center of mass momentum, where high and low is relative to the Fermi momentum of the nucleus. The observed correlation indicates that the EMC effect, like 2N-SRC pairs, is related to high momentum nucleons in the nucleus. This paper reviews previous studies of the EMC-SRC correlation and studies its robustness. It also presents a planned experiment aimed at studying the origin of this EMC-SRC correlation.
Selection of the Taylor-Saffman Bubble does not Require Surface Tension
Giovani L. Vasconcelos,Mark Mineev-Weinstein
Physics , 2013, DOI: 10.1103/PhysRevE.89.061003
Abstract: A new general class of exact solutions is presented for the time evolution of a bubble of arbitrary initial shape in a Hele-Shaw cell when surface tension effects are neglected. These solutions are obtained by conformal mapping the viscous flow domain to an annulus in an auxiliary complex-plane. It is then demonstrated that the only stable fixed point (attractor) of the non-singular bubble dynamics corresponds precisely to the selected pattern. This thus shows that, contrary to the established theory, bubble selection in a Hele-Shaw cell does not require surface tension. The solutions reported here significantly extend previous results for a simply-connected geometry (finger) to a doubly-connected one (bubble). We conjecture that the same selection rule without surface tension holds for Hele-Shaw flows of arbitrary connectivity. We also believe that this mechanism can be found in other, similarly described, selection problems.
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