Doping and Transfer of High Mobility Graphene Bilayers for Room Temperature Mid-Wave Infrared Photodetectors

High-performance graphene-HgCdTe detector technology has been developed combining the best properties of both materials for mid-wave infrared (MWIR) detection and imaging. The graphene functions as a high mobility channel that whisks away carriers before they can recombine, further contributing to detection performance. Comprehensive modeling on the HgCdTe, graphene, and the HgCdTe-graphene interface has aided the design and development of this MWIR detector technology. Chemical doping of the bilayer graphene lattice has enabled p-type doping levels in graphene for high mobility implementation in high-performance MWIR HgCdTe detectors. Characterization techniques, including SIMS and XPS, confirm high boron doping concentrations. A spin-on doping (SOD) procedure is outlined that has provided a means of doping layers of graphene on native substrates, while subsequently allowing integration of the doped graphene layers with HgCdTe for final implementation in the MWIR photodetection devices. Successful integration of graphene into HgCdTe photodetectors can thus provide higher MWIR detector efficiency and performance compared to HgCdTe-only detectors. New earth observation measurement capabilities are further enabled by the room temperature operational capability of the graphene-enhanced HgCdTe detectors and arrays to benefit and advance space and terrestrial applications

Mutations in FRMD7, a newly identified member of the FERM family, cause X-linked idiopathic congenital nystagmus

Idiopathic congenital nystagmus (ICN) is characterised by involuntary, periodic, predominantly horizontal, oscillations of both eyes. We identified 22 mutations in FRMD7 in 26 families with X-linked idiopathic congenital nystagmus. Screening of 42 ICN singleton cases (28 male, 14 females) yielded three mutations (7%). We found restricted expression of FRMD7 in human embryonic brain and developing neural retina suggesting a specific role in the control of eye movement and gaze stability

25th annual computational neuroscience meeting: CNS-2016

The same neuron may play different functional roles in the neural circuits to which it belongs. For example, neurons in the Tritonia pedal ganglia may participate in variable phases of the swim motor rhythms [1]. While such neuronal functional variability is likely to play a major role the delivery of the functionality of neural systems, it is difficult to study it in most nervous systems. We work on the pyloric rhythm network of the crustacean stomatogastric ganglion (STG) [2]. Typically network models of the STG treat neurons of the same functional type as a single model neuron (e.g. PD neurons), assuming the same conductance parameters for these neurons and implying their synchronous firing [3, 4]. However, simultaneous recording of PD neurons shows differences between the timings of spikes of these neurons. This may indicate functional variability of these neurons. Here we modelled separately the two PD neurons of the STG in a multi-neuron model of the pyloric network. Our neuron models comply with known correlations between conductance parameters of ionic currents. Our results reproduce the experimental finding of increasing spike time distance between spikes originating from the two model PD neurons during their synchronised burst phase. The PD neuron with the larger calcium conductance generates its spikes before the other PD neuron. Larger potassium conductance values in the follower neuron imply longer delays between spikes, see Fig. 17.Neuromodulators change the conductance parameters of neurons and maintain the ratios of these parameters [5]. Our results show that such changes may shift the individual contribution of two PD neurons to the PD-phase of the pyloric rhythm altering their functionality within this rhythm. Our work paves the way towards an accessible experimental and computational framework for the analysis of the mechanisms and impact of functional variability of neurons within the neural circuits to which they belong

Affective Organizational Commitment as a Predictor of Military Enlistment Discussion and Recommendation

Abstract This exploratory study considered the relationship between affective organizational commitment, attitudes toward military advertising, attitudes toward the military and intentions with regard to enlistment in the military. A total of 155 participants participated in an experiment after which they filled out a questionnaire. Results indicated that attitudes toward the ad and attitudes toward the military influence affective organizational commitment. They also showed that affective organizational commitment predicts enlistment discussion and referral intentions. These findings as well as implications and future research opportunities are discussed

Current Trends in Unilateral Cleft Lip Care: A 10-Year Update on Practice Patterns.

BACKGROUND: The care of unilateral cleft lip (UCL) patients is extremely variable. Historical benchmarks for perioperative and intraoperative choices by cleft surgeons were produced by Sitzman et al (Plast Reconstr Surg. 2008;121:261e-270e) in 2005. However, emerging data and cleft lip repair methods around this period were not captured by this study. The aim of this study was to update the current practice patterns of cleft lip surgeons. METHODS: An electronic survey was distributed to surgeons in the American Cleft Palate Association. Demographic data about the surgeon were collected as well as their choices regarding perioperative and intraoperative cleft lip care. RESULTS: Eighty-six surgeons responded to the survey. Nearly 40% of surgeons have changed their technique for UCL repair with Fisher anatomical subunit repair gaining significant popularity. Nasoalveolar molding is also being used more frequently (41% vs 22%). At the time of the cleft lip repair, closure of the nasal floor is occurring in 83.1% of patients and primary cleft rhinoplasty is being performed routinely 57% of the time. CONCLUSIONS: Over the last 10 years, there has been an increase in the use of modified rotation advancement repairs and Fisher anatomic subunit approximation technique for treatment of UCL. There continues to be a lack of evidence regarding superiority of specific repair techniques or the benefits of adjunct procedures, which results in varying practice patterns. Educating all cleft surgeons on practices that are well supported is important to improve care to cleft patients