Rovibrational Resonance Effects In Collision-Induced Electronic Energy Transfer: I2(E,v=0-2)+CF4

Collisions of I-2 in the E(0(g)(+)) electronic state with CF4 molecules induce electronic energy transfer to the nearby D, beta, and D-\u27 ion-pair states. Simulations of dispersed fluorescence spectra reveal collision-induced electronic energy transfer rate constants and final vibrational state distributions within each final electronic state. In comparison with earlier reports on I-2(upsilon(E)=0-2) collisions with He or Ar atoms, we find markedly different dynamics when I-2, excited to the same rovibronic states, collides with CF4. Final vibrational state distributions agree with the associated Franck-Condon factors with the initially prepared state to a greater degree than those found with He or Ar collision partners and suggest that internal degrees of freedom in the CF4 molecule represent a substantial means for accepting the accompanying loss of I-2 vibronic energy. Comparison of the E -\u3e D transfer of I-2 excited to the J=23 and J=55 levels of the upsilon(E)=0 state reveals the onset of specific, nonstatistical dynamics as the available energy is increased above the threshold for excitation of the low frequency nu(2) bending mode of CF4. (c) 2006 American Institute of Physics

CXCR4 expression heterogeneity in neuroblastoma cells due to ligand-independent regulation

<p>Abstract</p> <p>Background</p> <p>CXCR4, the receptor for the chemokine stromal-derived factor 1 (SDF-1), has been shown to mediate many of the processes essential for cancer progression such as tumor cell proliferation, metastasis, and angiogenesis. To understand the role of CXCR4 in the biology of neuroblastoma, a disease that presents with wide spread metastases in over 50% of patients, we screened ten patient derived-neuroblastoma cell-lines for basal CXCR4 expression and sought to identify characteristics that correlate with tumor cell phenotype.</p> <p>Results</p> <p>All cell lines expressed <it>CXCR4 </it>mRNA at variable levels, that correlated well with three distinct classes of CXCR4 surface expression (low, moderate, or high) as defined by flow cytometry. Analysis of the kinetics of CXCR4 surface expression on moderate and high expressing cell lines showed a time-dependent down-regulation of the receptor that directly correlated with cell confluency, and was independent of SDF1. Cell lysates showed the presence of multiple CXCR4 isoforms with three major species of approximately 87, 67 and 55 kDa associating with high surface expression, and two distinct species of 45 and 38 kDa correlating with low to null surface expression. Western blot analysis of CXCR4 immunoprecipitates showed that the 87 and 67 kDa forms were ubiquitinated, while the others were not. Finally, treatment of cells with a proteasome inhibitor resulted in down regulation of CXCR4 surface expression.</p> <p>Conclusions</p> <p>Taken together, these data show that regulation of CXCR4 surface expression in neuroblastoma cells can occur independently of SDF-1 contribution arguing against an autocrine mechanism. Additionally these data suggest that post-translational modifications of CXCR4, in part through direct ubiquitination, can influence trafficking of CXCR4 to the surface of neuroblastoma cells in a ligand-independent manner.</p

The Emergence of Behavioral Addiction in DSM-5

The release of the latest edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) has sparked continuous debate about the structure, organization, and inclusion or exclusion of mental disorders. The term addiction made its first appearance in the manual with the category of Substance-Related and Addictive Disorders, after much anticipation from mental health professionals. With the emergence of behavioral (process) addictions in the diagnostic manual such as gambling disorder, it is likely that other mental disorders with similar features will follow suit. Speculation about other behaviors that could potentially be addictive includes Internet use, sex, shopping, exercise, and compulsive eating, among others. The goal of the current review is twofold: to explain the concept of behavioral addictions, including a focus on gambling and Internet gaming disorders, and to discuss how the emergence of process addictions may influence the work of human services practitioners. Clinical implications within the human services profession are also discussed

Distance Supervision in Human Services

As the use of technology increases, there are more opportunities for students and human service professionals to participate in education and supervision remotely. Distance supervision has become increasingly popular in the field of human services, providing educators and practitioners with new methods of professional communication. However, the use of technology in supervision also poses unique challenges for human service professionals and requires additional ethical considerations. The following will address the above points as well as review both asynchronous and synchronous delivery methods for distance learning supervision and their utility for providing supervision in the field of human services

Resonant Inelastic X-Ray Scattering at the K Edge of Ge

We study the resonant inelastic x-ray scattering (RIXS) at the $K$ edge of Ge. We measure RIXS spectra with systematically varying momenta in the final state. The spectra are a measure of exciting an electron-hole pair. We find a single peak structure (except the elastic peak) as a function of photon energy, which is nearly independent of final-state momenta. We analyze the experimental data by means of the band structure calculation. The calculation reproduces well the experimental shape, clarifying the implication of the spectral shape.Comment: 17 pages,9 figures, Please also see our related paper: cond-mat/040500

The impact of sleep on eyewitness identifications.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.Peer reviewe

The impact of sleep on eyewitness identifications

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.Peer reviewe

The WorkingWell Smartphone App for Individuals with Serious Mental Illnesses: A Proof-of-Concept, Mixed Methods Feasibility Study (Preprint)

Background: The disparities in employment for individuals with serious mental illnesses (SMI) have been well documented, as have the benefits of work. The benefits of mobile technology in providing accessible, in-the-moment support for these individuals has been demonstrated. The WorkingWell mobile app was developed to meet the need for accessible follow-along supports for individuals with SMI in the workplace. Objective: We explore the usability, usage, usefulness and overall feasibility of the WorkingWell mobile app with individuals with SMI receiving community-based services and actively employed. Methods: In this proof-of-concept, mixed methods, two-month feasibility study (N=40), employed individuals with SMI were recruited in mental health agencies. Participants completed surveys regarding background characteristics and cellphone use at enrollment; and responded to interview items regarding app usability, usage and usefulness in technical assistance calls at one, two, four and six weeks of study participation and in the exit interview at 8 weeks. Data on the frequency of app usage were downloaded and monitored on a daily basis. A version of the System Usability Scale (SUS) was administered in the exit interview. Feasibility was determined by the percent of users completing the study. General impressions were obtained from users regarding user support materials, technical assistance, and study procedures. Results: Over half of the participants were male (60%, 24/40). The majority were age 55 or under (70%, 28/40), Caucasian (80%, 32/40), had less than a 4-year college education (78%, 31/40), were employed part-time (98%, 39/40), had been working more than six months (60%, 24/40), and indicated a diagnosis of bipolar, schizoaffective or depressive disorder (84%, 16/25). The vast majority of participants owned cellphones (95%, 38/40), using them multiple times per day (83%, 33/40). Their average rating on SUS usability items was 3.93 (SD = 0.77; range = 1.57 to 5.00), reflecting positive responses. Participants, in general, indicated WorkingWell was “very easy”, “straightforward”, “simple”, and “user-friendly”. Usability challenges were related to personal issues (e.g., memory) or to difficulties with the phone or app. Data on app usage varied considerably. The most frequent navigations were to the home screen, followed by Rate My Day and My Progress, and then by Manage the Moment and Remind Me. The app was described as useful by most study participants; 86% (30/35) agreed the app would help them manage better on the job. Thirty-five of the 40 original participants (87%) completed the study. Conclusions: The WorkingWell app is a feasible approach to providing accessible, as-needed employment support for individuals with SMI. The app would benefit from additional modifications to address recommendations from feasibility testing. Controlled research with larger samples, more diverse in individual characteristics and workplace settings, is essential to demonstrating the effectiveness of the app