Laurel University is an accredited, private interdenominational Christian college that delivers undergraduate, graduate and doctoral degree programs in on-campus, online, and in blended environments.Laurel University is located in High Point, just 15 miles south of Greensboro, North Carolina in the central Piedmont Triad area. The university offers a rural campus and stresses the importance of traditional family values, Judeo-Christian ethics, and biblical morality. Wikipedia.
Hansen C.J.,Planetary Science Institute |
Diniega S.,Jet Propulsion Laboratory |
Bridges N.,Laurel University |
Byrne S.,University of Arizona |
And 3 more authors.
Icarus | Year: 2015
Both wind and seasonal CO2 ice sculpt the dunes of Mars in today's climate. The High Resolution Imaging Science Experiment (HiRISE) on the Mars Reconnaissance Orbiter has returned extensive temporal coverage of changes on the north polar dunes for nearly four Mars years. The processes driving dune morphology changes such as the formation of new alcoves have been investigated. Considerable interannual variability has been observed. Most changes occur in the period of time when HiRISE cannot image: late summer and fall when light levels are too low to see subtle changes on the dunes and the polar hood obscures the surface, and winter when the cap is in polar night. This is consistent with seasonal control but does not allow us to directly differentiate between eolian processes vs. CO2 ice as the driving agent for alcove formation. Circumstantial evidence and observations of analog processes in the southern mid-latitudes however implicates processes associated with frost emplacement and removal. © 2014 Elsevier Inc.
Skok J.R.,Brown University |
Mustard J.F.,Brown University |
Ehlmann B.L.,Brown University |
Milliken R.E.,University of Notre Dame |
Murchie S.L.,Laurel University
Nature Geoscience | Year: 2010
The martian surface features abundant volcanoes and evidence for past liquid water. Extant or relict martian volcanic hydrothermal systems have therefore been sought in the pursuit of evidence for habitable environments 1. The Mars Exploration Rover, Spirit, detected deposits highly enriched in silica with accessory minerals, suggesting formation by hydrothermal leaching of basaltic rocks by low-pH solutions 2. However, extensive erosion has obscured the context of the formation environment of these deposits. Silica deposits have also been identified remotely, but also with limited contextual clues to their formation; aqueous alteration products of basalt and volcanic ash are the most likely sources 3,4. Here we report the detection from orbit of hydrated silica deposits on the flanks of a volcanic cone in the martian Syrtis Major caldera complex. Near-infrared observations show dozens of localized hydrated silica deposits. As a result of the morphology of these deposits and their location in and around the cone summit, we suggest that the deposits were produced by a volcanically driven hydrothermal system. The cone and associated lava flows post-date Early Hesperian volcano formation. We conclude that, if a relict hydrothermal system was associated with the silica deposits, it may preserve one of the most recent habitable microenvironments on Mars. © 2010 Macmillan Publishers Limited. All rights reserved.
Raouafi N.-E.,Laurel University |
Stenborg G.,George Mason University
Astrophysical Journal | Year: 2014
We report on the role of small-scale, transient magnetic activity in the formation and evolution of solar coronal plumes. Three plumes within equatorial coronal holes are analyzed over the span of several days based on the Solar Dynamic Observatory (SDO)/Atmospheric Imaging Assembly 171 Å and 193 Å images and SDO/Helioseismic and Magnetic Imager line-of-sight magnetograms. The focus is on the role of transient structures at the footpoints in sustaining coronal plumes for relatively long periods of time (i.e., several days). The appearance of plumes is a gradual and lengthy process. In some cases, the initial stages of plume formation are marked by the appearance of pillar-like structures whose footpoints are the sources of transient brightenings. In addition to nominal jets occurring prior to and during the development of plumes, the data show that a large number of small jets (i.e., "jetlets") and plume transient bright points (PTBPs) occur on timescales of tens of seconds to a few minutes. These features are the result of quasi-random cancellations of fragmented and diffuse minority magnetic polarity with the dominant unipolar magnetic field concentration over an extended period of time. They unambiguously reflect a highly dynamical evolution at the footpoints and are seemingly the main energy source for plumes. This suggests a tendency for plumes to be dependent on the occurrence of transients (i.e., jetlets, and PTBPs) resulting from low-rate magnetic reconnection. The decay phase of plumes is characterized by gradual fainting and multiple rejuvenations as a result of the dispersal of the unipolar magnetic concentration and its precipitation into multiple magnetic centers. © 2014. The American Astronomical Society. All rights reserved.
McCord T.B.,Bear Fight Institute |
Castillo-Rogez J.,Jet Propulsion Laboratory |
Rivkin A.,Laurel University
Space Science Reviews | Year: 2011
Ceres appears likely to be differentiated and to have experienced planetary evolution processes. This conclusion is based on current geophysical observations and thermodynamic modeling of Ceres' evolution. This makes Ceres similar to a small planet, and in fact it is thought to represent a class of objects from which the inner planets formed. Verification of Ceres' state and understanding of the many steps in achieving it remains a major goal. The Dawn spacecraft and its instrument package are on a mission to observe Ceres from orbit. Observations and potential results are suggested here, based on number of science questions. © Springer Science+Business Media B.V. 2011.
Ginsberg T.B.,Laurel University
Clinics in Geriatric Medicine | Year: 2010
It should be recognized that sexuality in the aging male is of such import that a complete sexual history must be performed. By taking a complete sexual history, facts can be obtained that will allow for appropriate focus relating to a holistic evaluation and will enable us to dispel antiquated sexual myths pertaining to the aging male. If initiated by the history taker, questions concerning sexuality may be discussed more comfortably by the patient. Erectile dysfunction, male sexual response cycle, testosterone, sexually transmitted diseases, human immunodeficiency virus, long-term illness, along with religion and culture are explored in this article with the aim of improving one's knowledge base, self reflection, and awareness of the importance of male sexuality. A complete understanding and appreciation of the aging male's medical history, surgical history, social history, and emotional history as well as his sexual, cultural, and religious concepts will allow the health care provider to better analyze information, and to recommend and provide appropriate advice and treatment to the aging male patient. © 2010 Elsevier Inc.
Goncharenko L.P.,Massachusetts Institute of Technology |
Hsu V.W.,University of Colorado at Boulder |
Brum C.G.M.,National Astronomy and Ionosphere Center |
Zhang S.-R.,Massachusetts Institute of Technology |
Fentzke J.T.,Laurel University
Journal of Geophysical Research: Space Physics | Year: 2013
This paper presents a case study of the day-to-day variability in the midlatitude upper atmospheric ion temperature (∼200-400 km) with a focus on variability resulting from meteorological forcing. The data are obtained by the Millstone Hill incoherent scatter radar (42.6°N, 288.5°E) on 18-31 January 2010, in coincidence with a major sudden stratospheric warming. We elucidate oscillations in ion temperature with both tidal periods (∼8 h and ∼12 h) and non-tidal periods (>24 h) by analyzing residuals between the observed temperatures and those expected from an empirical model. We present the spatial-temporal development of periodicities in ion temperature and discuss to what degree these periodicities might be related to the sudden stratospheric warming event. The spectral location and temporal evolution of periodicities with ∼9.9-12.9 h and ∼6.2-7.9 h suggest that they are related to the semidiurnal (12 h) and terdiurnal (8 h) tides that are enhanced during the sudden stratospheric warming. Periodicities with ∼3-4 d and ∼10-13 d are likely related to Rossby waves with 4 d and 10 d periods, while the strong periodicity observed at 16-17 h could result from the nonlinear interaction of the quasi 2 d wave with the semidiurnal tide. As planetary waves are not expected to propagate to altitudes of ∼200-250 km, these experimental results raise questions about the potential mechanisms of coupling between the lower and upper atmosphere. © 2012. American Geophysical Union. All Rights Reserved.
Navarro E.,Laurel University |
Serrano-Heras G.,Laurel University |
Castano M.J.,Laurel University |
Solera J.,General University Hospital
Clinica Chimica Acta | Year: 2015
Real-time PCR is the method of choice in many laboratories for diagnostic and food applications. This technology merges the polymerase chain reaction chemistry with the use of fluorescent reporter molecules in order to monitor the production of amplification products during each cycle of the PCR reaction. Thus, the combination of excellent sensitivity and specificity, reproducible data, low contamination risk and reduced hand-on time, which make it a post-PCR analysis unnecessary, has made real-time PCR technology an appealing alternative to conventional PCR. The present paper attempts to provide a rigorous overview of fluorescent-based methods for nucleic acid analysis in real-time PCR described in the literature so far. Herein, different real-time PCR chemistries have been classified into two main groups; the first group comprises double-stranded DNA intercalating molecules, such as SYBR Green I and EvaGreen, whereas the second includes fluorophore-labeled oligonucleotides. The latter, in turn, has been divided into three subgroups according to the type of fluorescent molecules used in the PCR reaction: (i) primer-probes (Scorpions, Amplifluor®, LUX™, Cyclicons, Angler®); (ii) probes; hydrolysis (TaqMan, MGB-TaqMan, Snake assay) and hybridization (Hybprobe or FRET, Molecular Beacons, HyBeacon™, MGB-Pleiades, MGB-Eclipse, ResonSense®, Yin-Yang or displacing); and (iii) analogues of nucleic acids (PNA, LNA®, ZNA™, non-natural bases: Plexor™ primer, Tiny-Molecular Beacon). In addition, structures, mechanisms of action, advantages and applications of such real-time PCR probes and analogues are depicted in this review. © 2014 Elsevier B.V..
Raouafi N.-E.,Laurel University |
Georgoulis M.K.,Academy of Athens |
Rust D.M.,Laurel University |
Bernasconi P.N.,Laurel University
Astrophysical Journal | Year: 2010
Observations from the X-ray telescope (XRT) on Hinode are used to study the nature of X-ray-bright points, sources of coronal jets. Several jet events in the coronal holes are found to erupt from small-scale, S-shaped bright regions. This finding suggests that coronal micro-sigmoids may well be progenitors of coronal jets. Moreover, the presence of these structures may explain numerous observed characteristics of jets such as helical structures, apparent transverse motions, and shapes. Analogous to large-scale sigmoids giving rise to coronal mass ejections (CMEs), a promising future task would perhaps be to investigate whether solar eruptive activity, from coronal jets to CMEs, is self-similar in terms of properties and instability mechanisms. © 2010. The American Astronomical Society. All rights reserved.
Finkel M.A.,Laurel University
Journal of Child Sexual Abuse | Year: 2011
The most available form of evidence in child sexual abuse cases is what the child has to say about his or her alleged experience. The most difficult skill for clinicians to develop is the how tos of talking to children in a developmentally appropriate, nonjudgmental, facilitative, and empathetic manner. This manuscript provides insight into obtaining historical details about a child's experience and guidance regarding how to incorporate those details when formulating a balanced and defensible opinion. The consultative report should be an instrument to explain the presence or absence of physical findings, the significance of symptoms temporally related to sexual contact, and discrepancies between a child's perception of an experience and physical findings. © The CARES Institute.
Finkel M.A.,Laurel University |
Alexander R.A.,Jacksonville University
Journal of Child Sexual Abuse | Year: 2011
A key portion of the medical evaluation of child sexual abuse is the medical history. This differs from interviews or histories obtained by other professionals in that it is focuses more on the health and well-being of the child. Careful questions should be asked about all aspects of the child's medical history by a skilled, compassionate, nonjudgmental, and objective clinician. Often the diagnosis of sexual abuse is based only on the medical history. The history can be further understood by knowledge of how children are abused and their reactions to it. By addressing the child's and parent's concerns, reassurance can also be provided about what is normal and abnormal with the child's body. Copyright © Taylor & Francis Group, LLC.