The Effect of a Corona Discharge on a Lightning Attachment

DOE Office of Scientific and Technical Information (OSTI.GOV)

Aleksandrov, N.L.; Bazelyan, E.M.; Raizer, Yu.P.

2005-01-15

The interaction between the lightning leader and the space charge accumulated near the top of a ground object in the atmospheric electric field is considered using analytical and numerical models developed earlier to describe spark discharges in long laboratory gaps. The specific features of a nonstationary corona discharge that develops in the electric field of a thundercloud and a downward lightning leader are analyzed. Conditions for the development of an upward lightning discharge from a ground object and for the propagation of an upward-connecting leader from the object toward a downward lightning leader (the process determining the point of strikemore » to the ground) are investigated. Possible mechanisms for the interaction of the corona space charge with an upward leader and prospects of using it to control downward lightning discharges are analyzed.« less

Observations of the initial stage of a rocket-and-wire-triggered lightning discharge

NASA Astrophysics Data System (ADS)

Zhang, Yang; Krehbiel, Paul R.; Zhang, Yijun; Lu, Weitao; Zheng, Dong; Xu, Liangtao; Huang, Zhigang

2017-05-01

Observations have been obtained of the initial stage of a rocket-and-wire-triggered lightning flash with a high-resolution broadband VHF interferometer. The discharge produced 54 precursor current pulses (PCPs) over 883 ms during the rocket's ascent. The interferometer observations show that the PCPs were produced by breakdown at the ascending tip of the rocket, and that individual PCPs were produced by weak upward positive breakdown over meters-scale distances, followed by more energetic, fast downward negative breakdown over several tens of meters distance. The average propagation speeds were 5 × 106 m s-1 and 3 × 107 m s-1, respectively. The sustained upward positive leader (UPL) was initiated by a rapid, repetitive burst of 14 precursor pulses. Upon initiation, the VHF radiation abruptly became continuous with time. Significantly, breakdown during the UPL appeared to extend the discharge in a similar manner to that of the precursor pulses.

Photographic and LMA observations of a blue starter over a New Mexico thunderstorm

NASA Astrophysics Data System (ADS)

Edens, H. E.; Krehbiel, P. R.; Rison, W.; Hunyady, S. J.

2010-12-01

On the evening of August 3, 2010 we photographed a blue starter over an electrically active storm complex about 120 km to the WNW of Langmuir Laboratory in central New Mexico. The event occurred close to a broad overshooting top at an altitude of 15 km above MSL. It was also observed visually and detected by the Lightning Mapping Array (LMA) deployed around the mountaintop observatory. The blue starter appears as a white-blue leader channel propagating away from the storm top not straight upward but at a large angle from vertical, slightly curving upward and transitioning to an increasingly diffuse blue glow. In addition to this leader, a more diffuse glow of blue light from one or two additional leaders is seen in the background. The curved channel of the main leader and the fact that it did not propagate along a straight path upward indicates that a relatively strong local electric field near the storm top existed that dictated leader propagation and direction rather than the large-scale storm electric field. The visible part of the starter is estimated to have developed to about 1 km above the storm top. From the LMA data we infer that the blue starter was a screening layer discharge that initiated between upper positive charge and a negatively charged screening layer. A negative leader appears to initiate at 15 km altitude and propagates downward for 2 to 3 km, after which scattered and ill-defined activity occurred in the cloud between 10 to 15 km altitude. This indicates that the visible part of the blue starter emanating out of the storm top, which was photographed but not detected by the LMA, was positive breakdown. The event lasted for 100 ms in the LMA data. The storm where the starter occurred in was producing predominantly intracloud (IC) flashes at a rate of about 20 per minute. The starter itself occurred independently of other discharges in the storm about 4 seconds after a normal polarity IC flash. About 5 minutes after the first blue starter, a second luminous event was recorded further away above the cloud top, which was similar but smaller in extent both optically and as detected by the LMA. It too was preceded by a regular IC flash 5 seconds earlier.

Lightning Attachment to Wind Turbines in Central Kansas: Video Observations, Correlation with the NLDN and in-situ Peak Current Measurements

NASA Astrophysics Data System (ADS)

Myers, J.; Cummins, K. L.; Hutchinson, M.; Nag, A.

2012-12-01

Lightning attachment to tall objects has been studied for decades. The attachment of lightning to electric power transmission towers in elevated terrain has driven much of the quantitative assessment of lightning characteristics in the 1970's and 80's. This has led to the understanding that in flat terrain, the probability of upward-initiated lightning is negligible for tower heights less than 100 m. For tower heights greater than 100, the probability increases roughly linearly with the log of height, reaching 100% at a height of 400 m. Additionally, the probability of upward initiation increases when the object resides on locally-elevated terrain. Over the last decade, there has been renewed interest in the study of lightning attachment to tall objects in general, and wind turbines in particular, following the establishment of large "wind farms" in lightning-prone regions. In this study, we present video observations, radiation magnetic field, and in-situ peak current measurements of lightning from an ongoing field program in a large wind farm in north-central Kansas, located in the U.S. Central Great Plains. The terrain variations within the wind farm are small rolling hills with peak variations on the order of 25 m. All turbines had a turbine hub height of 80 m, and a blade tip maximum height of 125 m. Two digital video camera systems (60 fields-per-second) were configured to self-trigger 2-second video sequences using a sequential-field-subtraction scene analysis (ufo-Capture). The two cameras had a common field of view that included 8 of the wind turbines. Nearby NLDN sensors were configured to record information that allows reconstruction of magnetic field waveforms within the bandwidth of the NLDN sensors. Some of the turbines were equipped with semi-quantitative in-situ peak current measuring devices. To date, more than 100 cloud-to-ground (CG) flashes have terminated within the perimeter of the wind farm. Video observations of flashes that attached to turbines (all to turbine blades) include five natural (downward leader) flashes and two "upward flashes" (fully developed upward leaders lasting 10's of milliseconds). Both upward flashes appear to have been triggered by nearby positive CG flashes, resulting in upward (presumably positive) leaders. Selected video observations in conjunction with NLDN data and waveform measurements, and in situ current measurements obtained during this campaign, will be presented and discussed in the context of storm characteristics. Differences with previous findings for fixed towers (no rotating blades) will also be discussed.

Characteristics of lightning leader propagation and ground attachment

NASA Astrophysics Data System (ADS)

Jiang, Rubin; Qie, Xiushu; Wang, Zhichao; Zhang, Hongbo; Lu, Gaopeng; Sun, Zhuling; Liu, Mingyuan; Li, Xun

2015-12-01

The grounding process and the associated leader behavior were analyzed by using high-speed video record and time-correlated electric field change for 37 natural negative cloud-to-ground flashes. Weak luminous grounded channel was recognized below the downward leader tip in the frame preceding the return stroke, which is inferred as upward connecting leader considering the physical process of lightning attachment, though not directly confirmed by sequential frames. For stepped leader-first return strokes, the upward connecting leaders tend to be induced by those downward leader branches with brighter luminosity and lower channel tip above ground, and they may accomplish the attachment with great possibility. The upward connecting leaders for 2 out of 61 leader-subsequent stroke sequences were captured in the frame prior to the return stroke, exhibiting relatively long channel lengths of 340 m and 105 m, respectively. The inducing downward subsequent leaders were of the chaotic type characterized by irregular electric field pulse train with duration of 0.2-0.3 ms. The transient drop of the high potential difference between stepped leader system and ground when the attachment occurred would macroscopically terminate the propagation of those ungrounded branches while would not effectively prevent the development of the existing space stem systems in the low-conductivity streamer zone apart from the leader tip. When the ungrounded branches are of poor connection with the main stroke channel, their further propagation toward ground would be feasible. These two factors may contribute to the occurrence of multiple grounding within the same leader-return stroke sequence.

Striking Distance Determined From High-Speed Videos and Measured Currents in Negative Cloud-to-Ground Lightning

NASA Astrophysics Data System (ADS)

Visacro, Silverio; Guimaraes, Miguel; Murta Vale, Maria Helena

2017-12-01

First and subsequent return strokes' striking distances (SDs) were determined for negative cloud-to-ground flashes from high-speed videos exhibiting the development of positive and negative leaders and the pre-return stroke phase of currents measured along a short tower. In order to improve the results, a new criterion was used for the initiation and propagation of the sustained upward connecting leader, consisting of a 4 A continuous current threshold. An advanced approach developed from the combined use of this criterion and a reverse propagation procedure, which considers the calculated propagation speeds of the leaders, was applied and revealed that SDs determined solely from the first video frame showing the upward leader can be significantly underestimated. An original approach was proposed for a rough estimate of first strokes' SD using solely records of current. This approach combines the 4 A criterion and a representative composite three-dimensional propagation speed of 0.34 × 106 m/s for the leaders in the last 300 m propagated distance. SDs determined under this approach showed to be consistent with those of the advanced procedure. This approach was applied to determine the SD of 17 first return strokes of negative flashes measured at MCS, covering a wide peak-current range, from 18 to 153 kA. The estimated SDs exhibit very high dispersion and reveal great differences in relation to the SDs estimated for subsequent return strokes and strokes in triggered lightning.

Mathematical Formulation of the Remote Electric and Magnetic Emissions of the Lightning Dart Leader and Return Stroke

NASA Astrophysics Data System (ADS)

Thiemann, Edward M. B.

Lightning detection and geolocation networks have found widespread use by the utility, air traffic control and forestry industries as a means of locating strikes and predicting imminent recurrence. Accurate lightning geolocation requires detecting VLF radio emissions at multiple sites using a distributed sensor network with typical baselines exceeding 150 km, along with precision time of arrival estimation to triangulate the origin of a strike. The trend has been towards increasing network accuracy without increasing sensor density by incorporating precision GPS synchronized clocks and faster front-end signal processing. Because lightning radio waveforms evolve as they propagate over a finitely conducting earth, and that measurements for a given strike may have disparate propagation path lengths, accurate models are required to determine waveform fiducials for precise strike location. The transition between the leader phase and return stroke phase may offer such a fiducial and warrants quantitative modeling to improve strike location accuracy. The VLF spectrum of the ubiquitous downward negative lightning strike is able to be modeled by the transfer of several Coulombs of negative charge from cloud to ground in a two-step process. The lightning stepped leader ionizes a plasma channel downward from the cloud at a velocity of approximately 0.05c, leaving a column of charge in its path. Upon connection with a streamer, the subsequent return stroke initiates at or near ground level and travels upward at an average but variable velocity of 0.3c. The return stroke neutralizes any negative charge along its path. Subsequent dart leader and return strokes often travel smoothly down the heated channel left by a preceding stroke, lacking the halting motion of the preceding initial stepped leader and initial return stroke. Existing lightning models often neglect the leader current and rely on approximations when solving for the return stroke. In this thesis, I present an analytic solution to Maxwell's Equations for the lightning leader followed by a novel return stroke model. I model the leader as a downward propagating boxcar function of uniform charge density and constant velocity, and the subsequent return stroke is modeled as an upward propagating boxcar with a time dependent velocity. Charge conservation is applied to ensure self-consistency of the driving current and charge sources, and physical observations are used to support model development. The resulting transient electric and magnetic fields are presented at various distances and delay times and compared with measured waveforms and previously published models.

Observation of incomplete drainage of a branched negative stepped leader system during the initial return stroke, and its implications

NASA Astrophysics Data System (ADS)

Petersen, D.; Beasley, W. H.

2012-12-01

We present high-speed video, taken at 75,000 frames per second, of an anomalous lightning flash that involved two distinct return strokes from different branches of the same branched negative stepped leader system. During the initial return stroke the leader system was incompletely drained, resulting in the continued development of a large side branch. The upper portions of this side branch exhibited a pulse of luminosity during the initial return stroke, but the luminosity did not extend down the branch. The lower portion of the branch continued to develop downward as a negative stepped leader, but at a much slower velocity. Continued stepping activity was observed in this branch as it continued downward at a significantly reduced velocity, finally attaching to the earth 1.8 milliseconds after the main return stroke. The ensuing return stroke was characterized by a slower vertical velocity and weaker luminous pulse. Based on this observation, we coin the term "orphaned branch" to describe a branch of a leader system that is not drained during a return stroke. While our case involves a branch that eventually connected to the ground and produced a return stroke, we also consider the possibility that such branches may also simply cease to progress and effectively deposit large amounts of space charge near their extremities. Such space charge would have a strong influence on subsequent breakdown activity in their vicinity, such as shielding subsequent descending negative stepped leaders or triggering upward positive leaders from earth's surface.

A unified engineering model of the first stroke in downward negative lightning

NASA Astrophysics Data System (ADS)

Nag, Amitabh; Rakov, Vladimir A.

2016-03-01

Each stroke in a negative cloud-to-ground lightning flash is composed of downward leader and upward return stroke processes, which are usually modeled individually. The first stroke leader is stepped and starts with preliminary breakdown (PB) which is often viewed as a separate process. We present the first unified engineering model for computing the electric field produced by a sequence of PB, stepped leader, and return stroke processes, serving to transport negative charge to ground. We assume that a negatively charged channel extends downward in a stepped fashion during both the PB and leader stages. Each step involves a current wave that propagates upward along the newly formed channel section. Once the leader attaches to ground, an upward propagating return stroke neutralizes the charge deposited along the channel. Model-predicted electric fields are in reasonably good agreement with simultaneous measurements at both near (hundreds of meters, electrostatic field component is dominant) and far (tens of kilometers, radiation field component is dominant) distances from the lightning channel. Relations between the features of computed electric field waveforms and model input parameters are examined. It appears that peak currents associated with PB pulses are similar to return stroke peak currents, and the observed variation of electric radiation field peaks produced by leader steps at different heights above ground is influenced by the ground corona space charge.

The Surface Warfare Community’s 360-Degree Feedback Pilot Program: A Preliminary Analysis and Evaluation Plan

DTIC Science & Technology

2005-06-01

the effectiveness of this program as a development tool spurred the remarkable growth of acceptance and use within corporate America. Luthans and...that it is a useful development tool for an organization. The study on upward feedback of student leaders and followers at the United States Naval...The subjects were 978 student leaders in their junior year and 1,232 student followers in their freshman year. The followers provided upward

Why does negative CG lightning have subsequent return strokes?

NASA Astrophysics Data System (ADS)

Wilkes, R. A.; Kotovsky, D. A.; Uman, M. A.; Carvalho, F. L.; Jordan, D.

2017-12-01

It is not understood why cloud-to-ground (CG) lightning flashes lowering negative charge often produce discrete dart-leader/return-stroke sequences rather than having the first stroke drain the available cloud charge, as is almost always the case for CG lightning lowering positive charge. Triggered lightning data obtained at the International Center for Lightning Research and Testing (ICLRT) in north-central Florida have been analyzed to clarify the subsequent return-stroke process. In summers 2013 through 2016 at the ICLRT, 53% of the rocket launches did not initiate any part of a lightning flash, 13% of the rocket launches created an initial stage only (ISO) and failed to produce a following dart-leader/return-stroke sequences, and 34% of rocket launches produced an initial stage (IS) followed by return strokes. The IS of the triggered lightning consists of the upward positive leader and a following initial continuing current, both being responsible for transporting negative charge from the cloud to ground. Our ISO events may well have some commonality with the roughly 20 percent of natural CG flashes that fail to produce a dart-leader/return-stroke. We have analyzed the IS of 41 triggered lightning flashes with (19 cases) and without (22 cases) following return strokes and compared areas and heights of the flash using data collected by a Lightning Mapping Array (LMA). In our preliminary analysis, we can find no geometrical feature of the lightning channel during the IS that will predict the occurrence or lack of occurrence of following return strokes. We also have compared the triggered-lightning electrical current and charge transfer observed at the ground. We found that the average current, duration, and charge transfer during the IS for ISO events is each about half that of ISs analyzed which are followed by dart-leader/return-stroke sequences, contrary to the results presented from the GCOELD in China. Summarizing, there appear to be no differences in the channel geometry between initial stages that do or do not yield dart-leader/return-stroke sequences. In contrast, we find that particular electrical characteristics of the initial stage may indicate whether or not a dart-leader/return-stroke sequence may follow, potentially shedding light on the physical processes necessary for dart-leader initiation.

High-Energy Particle Showers Observed at Ground Level in Coincidence with Downward Lightning Leaders at the Telescope Array Observatory

NASA Astrophysics Data System (ADS)

Belz, John; Abbasi, Rasha; Le Von, Ryan; Krehbiel, Paul; Remington, Jackson; Rison, William

Terrestrial Gamma Ray Flashes (TGFs) detected by satellite observations have been shown to be generated by upward propagating negative leaders at altitudes of about 10 to 12 km above Mean Sea Level (MSL), and have durations ranging between a few hundred microseconds and a few milliseconds. The Telescope Array Cosmic Ray observatory, designed to observe air showers induced by ultra high energy cosmic rays, includes a surface scintillator detector (SD) covering approximately 700 square kilometers on a 1.2 km grid. Following the observation of anomalous SD triggers correlated with local lightning activity, a Lightning Mapping Array (LMA) and slow electric field antenna were installed at the TA site in order to characterize the lightning associated with these anomalous triggers. In this talk, we present evidence that the anomalous triggers are produced during the initial breakdown phase of fast, downward propagating, negative leaders above the detectors which produced the triggers. The durations of the high energy radiation are a few hundred microseconds, similar to satellite observations of TGFs. The triggers were produced within a few hundred microseconds of the initiation of the leaders, when the leaders were at an altitude of about 3 to 4 km MSL. The TA scintillation detectors are not optimized for gamma ray detection, however we present the results of simulations demonstrating that the fluxes observed are consistent with this picture. We conclude that the anomalous triggers observed by TA are clearly due to high energy radiation produced by the fast downward propagating negative leaders, and are probably downward-directed TGFs.

Whistle Blowing: A Message to Leaders and Managers

PubMed Central

Schein, Edgar H.

2016-01-01

This comment argues that instead of worrying about the pros and cons of whistleblowing one should focus on the more general problem of the failure of upward communication around safety and quality problems and consider what leaders and managers must do to stimulate subordinates to communicate and reward such communication. The article analyzes why safety failures occur and introduces the concept of practical drift and adaptive moves as necessary for systemic safety to be understood and better handled. It emphasizes the key role of senior leadership in creating a climate in which critical upward communication will become more likely. PMID:27239866

Female Leaders: Injurious or Inspiring Role Models for Women?

ERIC Educational Resources Information Center

Hoyt, Crystal L.; Simon, Stefanie

2011-01-01

The impact of female role models on women's leadership aspirations and self-perceptions after a leadership task were assessed across two laboratory studies. These studies tested the prediction that upward social comparisons to high-level female leaders will have a relatively detrimental impact on women's self-perceptions and leadership aspirations…

High Speed Video Observations of Natural Lightning and Their Implications to Fractal Description of Lightning

NASA Astrophysics Data System (ADS)

Liu, N.; Tilles, J.; Boggs, L.; Bozarth, A.; Rassoul, H.; Riousset, J. A.

2016-12-01

Recent high speed video observations of triggered and natural lightning flashes have significantly advanced our understanding of lightning initiation and propagation. For example, they have helped resolve the initiation of lightning leaders [Stolzenburg et al., JGR, 119, 12198, 2014; Montanyà et al, Sci. Rep., 5, 15180, 2015], the stepping of negative leaders [Hill et al., JGR, 116, D16117, 2011], the structure of streamer zone around the leader [Gamerota et al., GRL, 42, 1977, 2015], and transient rebrightening processes occurring during the leader propagation [Stolzenburg et al., JGR, 120, 3408, 2015]. We started an observational campaign in the summer of 2016 to study lightning by using a Phantom high-speed camera on the campus of Florida Institute of Technology, Melbourne, FL. A few interesting natural cloud-to-ground and intracloud lightning discharges have been recorded, including a couple of 8-9 stroke flashes, high peak current flashes, and upward propagating return stroke waves from ground to cloud. The videos show that the propagation of the downward leaders of cloud-to-ground lightning discharges is very complex, particularly for the high-peak current flashes. They tend to develop as multiple branches, and each of them splits repeatedly. For some cases, the propagation characteristics of the leader, such as speed, are subject to sudden changes. In this talk, we present several selected cases to show the complexity of the leader propagation. One of the effective approaches to characterize the structure and propagation of lightning leaders is the fractal description [Mansell et al., JGR, 107, 4075, 2002; Riousset et al., JGR, 112, D15203, 2007; Riousset et al., JGR, 115, A00E10, 2010]. We also present a detailed analysis of the high-speed images of our observations and formulate useful constraints to the fractal description. Finally, we compare the obtained results with fractal simulations conducted by using the model reported in [Riousset et al., 2007, 2010].

Radio frequency observations of lightning discharges by the forte satellite.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Shao, X.; Jacobson, A. R.; Light, T.

2002-01-01

FORTE-observed VHF signatures for different lightning discharges are presented. For in-cloud discharges, a pulse pair is typically recorded and is named a 'transionospheric pulse pair' (TIPP). Many intense TIPPs are coherent and polarized, whereas initial and dart leaders do not show a recognizable degree of polarization. TIPPs are optically weaker than cloud-to-ground (CG) strokes, and stronger VHF TIPPs are optically darker. About 10% of CG strokes, mostly over seawater, produce extremely narrow, powerful VHF pulses at the very beginning of the return strokes. These narrow pulses are found to form an upward beam pattern.

Measured close lightning leader-step electric-field-derivative waveforms.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Jordan, Doug M.; Hill, Dustin; Biagi, Christopher J.

2010-12-01

We characterize the measured electric field-derivative (dE/dt) waveforms of lightning stepped-leader steps from three negative lightning flashes at distances of tens to hundreds of meters. Electromagnetic signatures of leader steps at such close distances have rarely been documented in previous literature. Individual leader-step three-dimensional locations are determined by a dE/dt TOA system. The leader-step field derivative is typically a bipolar pulse with a sharp initial half-cycle of the same polarity as that of the return stroke, followed by an opposite polarity overshoot that decays relatively slowly to background level. This overshoot increases in amplitude relative to the initial peak andmore » becomes dominant as range decreases. The initial peak is often preceded by a 'slow front,' similar to the slow front that precedes the fast transition to peak in first return stroke dE/dt and E waveforms. The overall step-field waveform duration is typically less than 1 {micro}s. The mean initial peak of dE/dt, range-normalized to 100 km, is 7.4 V m{sup -1} {micro}s{sup -1} (standard deviation (S.D.), 3.7 V m{sup -1} {micro}s{sup -1}, N = 103), the mean half-peak width is 33.5 ns (S.D., 11.9 ns, N = 69), and the mean 10-to-90% risetime is 43.6 ns (S.D., 24.2 ns, N = 69). From modeling, we determine the properties of the leader step currents which produced two typical measured field derivatives, and we use one of these currents to calculate predicted leader step E and dE/dt as a function of source range and height, the results being in good agreement with our observations. The two modeled current waveforms had maximum rates of current rise-to-peak near 100 kA {micro}s{sup -1}, peak currents in the 5-7 kA range, current half-peak widths of about 300 ns, and charge transfers of {approx}3 mC. As part of the modeling, those currents were propagated upward at 1.5 x 10{sup 8} m s{sup -1}, with their amplitudes decaying exponentially with a decay height constant of 25 m.« less

Registration of X-rays at 2500 m altitude in association with lightning flashes and thunderstorms

NASA Astrophysics Data System (ADS)

Montanyà, Joan; Fabró, Ferran; van der Velde, Oscar; Romero, David; Solà, Gloria; Hermoso, Juan Ramon; Soula, Serge; Williams, Earle R.; Pineda, Nicolau

2014-02-01

Electric fields and high-energy radiation of natural lightning measured at close range from a mountaintop tower are discussed. In none of the 12 negative cloud-to-ground upward flashes were X-rays observed. Also no energetic radiation was found in one negative upward leader at close range (20 m). In the first of two consecutive negative cloud-to-ground flashes, X-rays were detected during the last 1.75 ms of the leader. During the time of energetic radiation in the flash an intense burst of intracloud VHF sources was located by the interferometers. The X-ray production is attributed to the high electric field runaway electron mechanism during leader stepping. Even though the second flash struck closer than the previous one, no X-rays were detected. The absence of energetic radiation is attributed to being outside of the beam of X-ray photons from the leader tip or to the stepping process not allowing sufficiently intense electric fields ahead of the leader tip. High-speed video of downward negative leaders at the time when X-rays are commonly detected on the ground revealed the increase of speed and luminosity of the leader. Both phenomena allow higher electric fields at the leader front favoring energetic radiation. Background radiation was also measured during thunderstorms. The count rate of a particular day is presented and discussed. The increases in the radiation count rate are more coincident with radar reflectivity levels above 30 dBZ than with the total lightning activity close to the site. The increases of dose are attributed to radon daughter-ion precipitation.

A shielding theory for upward lightning

DOE Office of Scientific and Technical Information (OSTI.GOV)

Shindo, Takatoshi; Aihara, Yoshinori

1993-01-01

A new shielding theory is proposed based on the assumption that the occurrence of lightning strokes on the Japan Sea coast in winter is due to the inception of upward leaders from tall structures. Ratios of the numbers of lightning strokes to high structures observed there in winter show reasonable agreement with values calculated by this theory. Shielding characteristics of a high structure in various conditions are predicted.

Whistle Blowing: A Message to Leaders and Managers Comment on "Cultures of Silence and Cultures of Voice: The Role of Whistleblowing in Healthcare Organizations".

PubMed

Schein, Edgar H

2015-11-29

This comment argues that instead of worrying about the pros and cons of whistleblowing one should focus on the more general problem of the failure of upward communication around safety and quality problems and consider what leaders and managers must do to stimulate subordinates to communicate and reward such communication. The article analyzes why safety failures occur and introduces the concept of practical drift and adaptive moves as necessary for systemic safety to be understood and better handled. It emphasizes the key role of senior leadership in creating a climate in which critical upward communication will become more likely. © 2016 by Kerman University of Medical Sciences.

A review of advances in lightning observations during the past decade in Guangdong, China

NASA Astrophysics Data System (ADS)

Zhang, Yijun; Lü, Weitao; Chen, Shaodong; Zheng, Dong; Zhang, Yang; Yan, Xu; Chen, Lüwen; Dong, Wansheng; Dan, Jianru; Pan, Hanbo

2016-08-01

This paper reviews recent advances in understanding the physical processes of artificially triggered lightning and natural lightning as well as the progress in testing lightning protection technologies, based on a series of lightning field campaigns jointly conducted by the Chinese Academy of Meteorological Sciences and Guangdong Meteorological Bureau since 2006. During the decade-long series of lightning field experiments, the technology of rocket-wire artificially triggered lightning has been improved, and has successfully triggered 94 lightning flashes. Through direct lightning current waveform measurements, an average return stroke peak current of 16 kA was obtained. The phenomenon that the downward leader connects to the lateral surface of the upward leader in the attachment process was discovered, and the speed of the upward leader during the connection process being significantly greater than that of the downward leader was revealed. The characteristics of several return strokes in cloud-to-ground lighting have also been unveiled, and the mechanism causing damage to lightning protection devices (i.e., ground potential rise within the rated current) was established. The performance of three lightning monitoring systems in Guangdong Province has also been quantitatively assessed.

Stepped-to-dart Leaders in Cloud-to-ground Lightning

NASA Astrophysics Data System (ADS)

Stolzenburg, M.; Marshall, T. C.; Karunarathne, S.; Karunarathna, N.; Warner, T.; Orville, R. E.

2013-12-01

Using time-correlated high-speed video (50,000 frames per second) and fast electric field change (5 MegaSamples per second) data for lightning flashes in East-central Florida, we describe an apparently rare type of subsequent leader: a stepped leader that finds and follows a previously used channel. The observed 'stepped-to-dart leaders' occur in three natural negative ground flashes. Stepped-to-dart leader connection altitudes are 3.3, 1.6 and 0.7 km above ground in the three cases. Prior to the stepped-to-dart connection, the advancing leaders have properties typical of stepped leaders. After the connection, the behavior changes almost immediately (within 40-60 us) to dart or dart-stepped leader, with larger amplitude E-change pulses and faster average propagation speeds. In this presentation, we will also describe the upward luminosity after the connection in the prior return stroke channel and in the stepped leader path, along with properties of the return strokes and other leaders in the three flashes.

Trust in direct leaders and top leaders: A trickle-up model.

PubMed

Fulmer, C Ashley; Ostroff, Cheri

2017-04-01

Low levels of employee trust in top leaders pose challenges to organizations with respect to retention, performance, and profits. This research examines how trust in top leaders can be fostered through the relationships individuals have with their direct leaders. We propose a trickle-up model whereby trust in direct leaders exerts an upward influence on trust in top leaders. Drawing on the group value model, we predict that direct leaders' procedural justice serves as the key mechanism in facilitating the trickle-up process. Further, this process should be particularly strong for employees high on vertical collectivism, and the trickled-up trust in top leaders should exert a stronger impact on employees' overall performance in the organization than trust in direct leaders. Multiphase and multisource data from 336 individuals support these hypotheses. The findings advance our understanding of trust and leadership by highlighting that trust in leaders at different levels does not form independently and that trust in leaders trickles up across hierarchical levels. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

Lightning channels emerging from the top of thunderstorm clouds

NASA Astrophysics Data System (ADS)

van der Velde, Oscar; Montanyà, Joan; Soula, Serge; Pineda, Nicolau

2013-04-01

In recent years, research of transient luminous events is shifting from the rather common elves and sprites high above thunderclouds to the much less frequently observed phenomena issued by the storm cloud itself: gigantic jets (GJ) connecting to the ionosphere, and high-energy terrestrial gamma-ray flashes (TGFs) recorded at spacecraft. These phenomena both are observed more often at tropical latitudes, and a link may or may not exist between the two. It is likely that both share the requirement of high-altitude leaders of negative polarity, which in the case of a GJ escapes from the cloud top and transforms into a long streamer discharge. While this should be easier at lower air densities (higher altitude), previous studies showed that GJs need not be produced by storms with the highest tops. TGFs have still unclear origins, but may be related to production in negative leaders or other regions with strong vertically directed electric fields by runaway electron mechnisms. In December 2009, a gigantic jet was observed in the Mediterranean Sea region. During the same night, a nearby storm produced repeatedly multiple leaders piercing through the cloud top, without any sign of streamers reaching higher altitudes (unlike jets or starters). Similar observations of upward cloud-to-air lightning have been obtained recently by low-light cameras over storms near the Catalonian coast in different seasons. The production conditions are currently being investigated, with a focus on optically determined altitudes of lightning and evolution of storm tops (and their temperature level). The initial impression is that cloud flashes escape into the air above during stages when the growing convective cloud top is very close to the main charge production region. Upward cloud-to-air lightning has also been mapped by the Ebro Lightning Mapping Array, exhibiting inverse bolt-from-the blue characteristics, and as a by-product of a bolt-from-the-blue lightning strike to ground, recorded by a high-speed camera.

Ground-Based Observations of Terrestrial Gamma Ray Flashes Associated with Downward-Directed Lightning Leaders

NASA Astrophysics Data System (ADS)

Belz, J.; Abbasi, R.; Krehbiel, P. R.; LeVon, R.; Remington, J.; Rison, W.; Thomas, R. J.

2017-12-01

Terrestrial Gamma Flashes (TGFs) have been observed in satellite-borne gamma ray detectors for several decades, starting with the BATSE instrument on the Compton Gamma-Ray observatory in 1994. TGFs consist of bursts of upwards of 1018 primary gamma rays, with a duration of up to a few milliseconds, originating in the Earth's atmosphere. More recent observations have shown that satellite-observed TGFs are generated in upward-propagating negative leaders of intracloud lightning, suggesting that they may be sensitive to the processes responsible for the initial lightning breakdown. Here, we present the first evidence that TGFs are also produced at the beginning of negative cloud-to-ground flashes, and that they may provide a new window through which ground-based observatories may contribute to understanding the breakdown process. The Telescope Array Surface Detector (TASD) is a 700 square kilometer cosmic ray observatory, an array of 507 3m2 scintillators on a 1.2 km grid. The array is triggered and read out when at least three adjacent detectors observe activity within an 8 μs window. Following the observation of bursts of anomalous TASD triggers, lasting a few hundred microseconds and correlated with local lightning activity, a Lightning Mapping Array (LMA) and slow electric field antenna were installed at the TASD site in order to study the effect. From data obtained between 2014 and 2016, correlated observations were obtained for ten -CG flashes. In 9 out of 10 cases, bursts of up to five anomalous triggers were detected during the first ms of the flash, as negative breakdown was descending into lower positive storm charge. The triggers occurred when the LMA-detected VHF radiation sources were at altitudes between 1.5 to 4.5 km AGL. The tenth flash was initiated by an unusually energetic leader that reached the ground in 2.5 ms and produced increasingly powerful triggers down to about 500 m AGL. While the TASD is not optimized for individual gamma ray detection and energy measurement, simulation studies indicate that the fluxes and forward-beaming observed are consistent with production in processes such as the relativistic runaway electron avalanche. We conclude that the anomalous triggers observed by TA are most likely downward-directed Terrestrial Gamma Flashes.

Lightning protection using energized Franklin rods

DOE Office of Scientific and Technical Information (OSTI.GOV)

Abdel-Salam, M.; Al-Abdul-Latif, U.

1995-12-31

In this paper, the onset criterion of the upward streamers from an energized Franklin rod is formulated as a function of the geometry of the rod and the height and current of the downward leader. The electric field in the vicinity of the lightning rod is calculated using the charge simulation technique. The dependency of the radius of protection on the amplitude of the pulse voltage applied to Franklin rod, the downward leader current and the tip radius and height of the rod is investigated.

Hypothesis on the Origin of Chaotic Pulse Train in Dart Leader

NASA Astrophysics Data System (ADS)

Pu, Y.; Qie, X.; Sun, Z.; Jiang, R.; Liu, M.; Zhang, H.

2017-12-01

The origin of chaotic pulse train (CPT) during the dart leader propagation remains debatable. Based on previous observations, the `chaotic' dart leader is featured by chaotic electric fields, large charge transfer and high energetic radiation. In some cases, the cause of CPT was attributed to the concurrent branches or upward connecting leader. In this presentation, after carefully examining the simultaneous optical, electrical and VHF location data of triggered lightning in SHATLE and some results in other literature, we found the close relationship between the upper luminous leader segment and CPT. It is hypothesized that the CPT originates from the luminous corona zone around the upper leader channel beyond the leader tip. The fast, sufficient supply of negative charge from the cloud can result in a net negative charge layer around the ionized channel surface. Then new diffuse discharge can make a corona zone outside the channel and radiates in a chaotic way. The cloud charge reservoir and the speed of charge transfer, which can be indicated by the speed of the leader, are determinative to the generation of CPT. Using VHF location technique, we also estimated the speed evolution of the leader and link it with electric field change.

Promoting Gateway Course Success: Scaling Corequisite Academic Support

ERIC Educational Resources Information Center

Vandal, Bruce

2014-01-01

With research indicating that upwards of 50 percent of all new entering postsecondary education students are placed into remedial education and that students placed into remedial education are less likely to earn a postsecondary credential, policymakers and postsecondary leaders alike have committed themselves to transforming remedial education in…

Subject Leaders and School Strategy: Exercising Upward Influence?

ERIC Educational Resources Information Center

Chatwin, R.

2004-01-01

The National College for School Leadership continues to extend its influence into school through the medium of training programmes based on standards frameworks. It has been suggested that these have three features. First, they place an overwhelming emphasis on leadership, rather than on management and administration. Secondly, the view of…

Length estimations of presumed upward connecting leaders in lightning flashes to flat water and flat ground

NASA Astrophysics Data System (ADS)

Stolzenburg, Maribeth; Marshall, Thomas C.; Karunarathne, Sumedhe; Orville, Richard E.

2018-10-01

Using video data recorded at 50,000 frames per second for nearby negative lightning flashes, estimates are derived for the length of positive upward connecting leaders (UCLs) that presumably formed prior to new ground attachments. Return strokes were 1.7 to 7.8 km distant, yielding image resolutions of 4.25 to 19.5 m. No UCLs are imaged in these data, indicating those features were too transient or too dim compared to other lightning processes that are imaged at these resolutions. Upper bound lengths for 17 presumed UCLs are determined from the height above flat ground or water of the successful stepped leader tip in the image immediately prior to (within 20 μs before) the return stroke. Better estimates of maximum UCL lengths are determined using the downward stepped leader tip's speed of advance and the estimated return stroke time within its first frame. For 17 strokes, the upper bound length of the possible UCL averages 31.6 m and ranges from 11.3 to 50.3 m. Among the close strokes (those with spatial resolution <8 m per pixel), the five which connected to water (salt water lagoon) have UCL upper bound estimates averaging significantly shorter (24.1 m) than the average for the three close strokes which connected to land (36.9 m). The better estimates of maximum UCL lengths for the eight close strokes average 20.2 m, with slightly shorter average of 18.3 m for the five that connected to water. All the better estimates of UCL maximum lengths are <38 m in this dataset

How do stereotypes influence choice?

PubMed

Chaxel, Anne-Sophie

2015-05-01

In the study reported here, I tracked one process through which stereotypes affect choice. The Implicit Association Test (IAT) and a measurement of predecisional information distortion were used to assess the influence of the association between male gender and career on the evaluation of information related to the job performance of stereotypical targets (male) and nonstereotypical targets (female). When the IAT revealed a strong association between male gender and career and the installed leader in the choice process was a stereotypical target, decision makers supported the leader with more proleader distortion; when the IAT revealed a strong association between male gender and career and the installed leader in the choice process was a nonstereotypical target, decision makers supported the trailer with less antitrailer distortion. A stronger association between male gender and career therefore resulted in an upward shift of the evaluation related to the stereotypical target (both as a trailer and a leader), which subsequently biased choice. © The Author(s) 2015.

Are We There Yet? Alternative Fuels for School Buses

ERIC Educational Resources Information Center

Lea, Dennis; Carter, Deborah

2009-01-01

America's annual oil consumption continues to increase and is projected to continue the upward spiral into the foreseeable future. Alternative-fuel options are available that are not only cheaper in some cases on an energy-equivalent basis but are also more environmentally friendly. Education leaders need to be concerned with both these facts.…

Administrators' Descriptions of Their Leadership Roles in a Precollege Program

ERIC Educational Resources Information Center

Owens, Michael A.

2010-01-01

The purpose of this work is to describe how leaders of the Upward Bound (UB) program at a university in the western United States described their leadership roles in the program. It is a qualitative study based on data drawn from interviews, observations, written material, and field observations conducted over two years. Participants described…

Dynamics of streamer-to-leader transition at reduced air densities and its implications for propagation of lightning leaders and gigantic jets

NASA Astrophysics Data System (ADS)

da Silva, Caitano L.; Pasko, Victor P.

2013-12-01

In this paper we present modeling studies of air heating by electrical discharges in a wide range of pressures. The developed model is capable of quantifying the different contributions for heating of air at the particle level and rigorously accounts for the vibration-dissociation-vibration coupling. The model is validated by calculating the breakdown times of short air gaps and comparing to available experimental data. Detailed discussion on the role of electron detachment in the development of the thermal-ionizational instability that triggers the spark development in short air gaps is presented. The dynamics of fast heating by quenching of excited electronic states is discussed and the scaling of its main channels with ambient air density is quantified. The developed model is employed to study the streamer-to-leader transition process and to obtain its scaling with ambient air density. Streamer-to-leader transition is the name given to a sequence of events occurring in a thin plasma channel through which a relatively strong current is forced through, culminating in heating of ambient gas and increase of the electrical conductivity of the channel. This process occurs during the inception of leaders (from sharp metallic structures, from hydrometeors inside the thundercloud, or in virgin air) and during their propagation (at the leader head or during the growth of a space leader). The development of a thermal-ionizational instability that culminates in the leader formation and propagation is characterized by a change in air ionization mechanism from electron impact to associative ionization and by contraction of the plasma channel. The introduced methodology for estimation of leader speeds shows that the propagation of a leader is limited by the air heating of every newly formed leader section. It is demonstrated that the streamer-to-leader transition time has an inverse-squared dependence on the ambient air density at near-ground pressures, in agreement with similarity laws for Joule heating in a streamer channel. Model results indicate that a deviation from this similarity scaling occurs at very low air densities, where the rate of electronic power deposition is balanced by the channel expansion, and air heating from quenching of excited electronic states is very inefficient. These findings place a limit on the maximum altitude at which a hot and highly conducting lightning leader channel can be formed in the Earth's atmosphere, result which is important for understating of the gigantic jet (GJ) discharges between thundercloud tops and the lower ionosphere. Simulations of leader speeds at GJ altitudes demonstrate that initial speeds of GJs are consistent with the leader propagation mechanism. The simulation of a GJ, escaping upward from a thundercloud top, shows that the lengthening of the leader streamer zone, in a medium of exponentially decreasing air density, determines the existence of an altitude at which the streamer zones of GJs become so long that they dynamically extend (jump) all the way to the ionosphere.

High-Speed Video Observations of a Natural Lightning Stepped Leader

NASA Astrophysics Data System (ADS)

Jordan, D. M.; Hill, J. D.; Uman, M. A.; Yoshida, S.; Kawasaki, Z.

2010-12-01

High-speed video images of one branch of a natural negative lightning stepped leader were obtained at a frame rate of 300 kfps (3.33 us exposure) on June 18th, 2010 at the International Center for Lightning Research and Testing (ICLRT) located on the Camp Blanding Army National Guard Base in north-central Florida. The images were acquired using a 20 mm Nikon lens mounted on a Photron SA1.1 high-speed camera. A total of 225 frames (about 0.75 ms) of the downward stepped leader were captured, followed by 45 frames of the leader channel re-illumination by the return stroke and subsequent decay following the ground attachment of the primary leader channel. Luminous characteristics of dart-stepped leader propagation in triggered lightning obtained by Biagi et al. [2009, 2010] and of long laboratory spark formation [e.g., Bazelyan and Raizer, 1998; Gallimberti et al., 2002] are evident in the frames of the natural lightning stepped leader. Space stems/leaders are imaged in twelve different frames at various distances in front of the descending leader tip, which branches into two distinct components 125 frames after the channel enters the field of view. In each case, the space stem/leader appears to connect to the leader tip above in the subsequent frame, forming a new step. Each connection is associated with significant isolated brightening of the channel at the connection point followed by typically three or four frames of upward propagating re-illumination of the existing leader channel. In total, at least 80 individual steps were imaged.

High-altitude electrical discharges associated with thunderstorms and lightning

NASA Astrophysics Data System (ADS)

Liu, Ningyu; McHarg, Matthew G.; Stenbaek-Nielsen, Hans C.

2015-12-01

The purpose of this paper is to introduce electrical discharge phenomena known as transient luminous events above thunderstorms to the lightning protection community. Transient luminous events include the upward electrical discharges from thunderstorms known as starters, jets, and gigantic jets, and electrical discharges initiated in the lower ionosphere such as sprites, halos, and elves. We give an overview of these phenomena with a focus on starters, jets, gigantic jets, and sprites, because similar to ordinary lightning, streamers and leaders are basic components of these four types of transient luminous events. We present a few recent observations to illustrate their main properties and briefly review the theories. The research in transient luminous events has not only advanced our understanding of the effects of thunderstorms and lightning in the middle and upper atmosphere, but also improved our knowledge of basic electrical discharge processes critical for sparks and lightning.

Foreign Students at California Baccalaureate Colleges: Attitudes, Perceptions, and Visions of Internationalization among Administrators, Faculty, and Staff

ERIC Educational Resources Information Center

Moore, Edwin L.

2013-01-01

The United States has long been a world leader in educating students from other countries. With the exception of temporary declines immediately following the terrorist events of September 11, 2001, the trajectory of international student enrollment has been steadily upward. However, since 9/11, other countries have increased their efforts to…

VHF Broadband Digital Interferometer for Real-time Operation

NASA Astrophysics Data System (ADS)

Kawasaki, Z. I.; Morimoto, T.; Akita, M.; Nakamura, Y.; Ushio, T.

2008-12-01

Lightning Research Group of Osaka University (LRG-OU) has been developing a VHF lightning mapper, Broadband Digital Interferometer (BDITF), to investigate lightning initiation and progression since 1995. When LRG-OU started the project, a multichannel digital storage oscilloscope was deployed to record VHF waveforms emitted by lightning discharges. VHF broadband antenna and necessary electronics like an amplifier were redesigned. Original VHF BDITF was operated in a rocket-triggered lightning experiment during winter thunderstorm season in Hokuriku, Japan. The first observation by BDITF was a rocket-triggered lightning, which lowered the positive charge to the ground. That meant ascending negative breakdown propagation was recorded, and LRG-OU obtained the lightning channel image by upward triggered lightning. Since LRGOU could validate the function and capability of BDITF through several field campaigns, a project to design and manufacture a special analog to digital converter for BDITF was initiated in 1998. Moreover software for a real-time data processing was developed. The first system of new BDITF was operated during a filed campaign in 2003, and lightning channels in two dimensions (2D), which meant azimuth and elevation format, were able to be reconstructed in a several seconds after occurrence of lightning flash. The BDITF system was considered to be an operational system recently. For three dimensional (3D) imaging, two sites operation of BDITF and post data processing of the triangulation are required. LRG-OU learned the bi- directional leader progression, possible charge distribution related to the leader initiation, and the speed of the leader propagation by the 3D imaging. The achievement of BDITF technique by LRG-OU gives us the chance of deployment and operation of the system around the rocket launching site of JAXA on the Tanegashima island. This operation is expected to contribute the go/no-go judgment of rocket launching by JAXA because of the now casting the location of lightning discharges. LRG-OU also joins in the several satellite projects. BDITF system which can be deployed on the satellite and/or space station is manufactured. The first VHF system is expected to be in the space in early 2009.

Observations of Seven Blue/Gigantic Jets above One Storm over the Atlantic Ocean

NASA Astrophysics Data System (ADS)

Liu, N.; Spiva, N.; Dwyer, J. R.; Rassoul, H.; Free, D. L.; Cummer, S. A.

2013-12-01

Blue/gigantic jets are electrical discharges developing from thundercloud tops and propagating to the upper atmosphere [e.g., Pasko et al., Nature, 416, 152, 2002; Su et al., Nature, 423, 973, 2003]. Not just producing an impressive display, gigantic jets establish a direct path of electrical contact between the upper troposphere and the lower ionosphere, capable of transferring a large amount of charge between them [Cummer et al., Nat. Geosci., 2, 617, 2009]. It has been suggested that they may play an important role in the earth's electrical environment [e. g., Pasko, Nature, 423, 927, 2003]. Upward discharges from thunderstorms like blue/gigantic jets are believed to originate from lightning leaders escaping from thunderclouds when the cloud's charges of different polarities are not balanced [Krehbiel et al., Nat. Geosci., 1, 233, 2008; Riousset et al., JGR, 115, A00E10, 2010]. On the evening of August 2, 2013, 4 gigantic jets, 2 blue jets and 1 blue starter were recorded within 26 min above a storm over the Atlantic Ocean by a low light level camera from the campus of Florida Institute of Technology. The events were also captured by two all-sky cameras: one again from the Florida Tech campus and the other from a nearby location. According to the NLDN data, positive intra-cloud flashes preceded all events except one gigantic jet. The distance between the observation site to the locations of the NLDN lightning discharges varies from 77 to 82 km. Optical signatures of intra-cloud discharge activities accompanied the events are clearly visible in the videos. The duration of each jet varies from about 300 ms to 1.2 s, and the 1.2 s duration is probably the longest that has been reported to date for jets. Rebrightening of gigantic jet structures occurs for at least two of the events. The upper terminal altitude of the 4 gigantic jets is greater than 76-81 km, the 2 blue jets reach about 48 and 51 km altitude, respectively, and the blue starter reaches 24 km altitude. The altitude of cloud tops varies from 14 to 20 km. All events exhibit a tree-like structure and develop in an impulsive manner. Similar to other observations of gigantic jets, bright beads appear at the tops of the gigantic jets. The impulsive upward propagation of the jets together with the positive polarity of the preceding intra-cloud discharges suggests that the jets originate from upward propagating negative leaders initiated inside the thundercloud. All events propagate upward from the top of the cloud nearly vertically except for one event that develops in a slanted direction, about twenty three degrees from the vertical. With only a few branches, the three blue jet/starter events display a structure very similar to a cloud-to-ground lightning stroke. Our observations support the unified view of the upward discharges from thunderclouds advanced by Krehbiel et al. [2008] and Riousset et al. [2010]. In this talk, we discuss the video observations of the events and the associated radio signatures in detail.

On the Transition from Initial Leader to Stepped Leader in Negative Cloud-to-ground Lightning

NASA Astrophysics Data System (ADS)

Stolzenburg, M.; Marshall, T. C.; Karunarathne, S.; Orville, R. E.

2017-12-01

High-speed video and electric field change (E-change) data are used to describe the first 5 ms of a natural negative cloud-to-ground (CG) flash. These observations reveal differences in appearance of both the video luminosity and the E-change pulses before the leader transitions to propagating as a negative stepped leader (SL). During the initial breakdown (IB) stage, the initial leader advances intermittently forward in jumps of 78-175 m, at intervals of 100-280 μs, and in separate bursts that are bright for a few 20-μs video frames. The IB pulses accompanying these luminosity bursts have long duration, large amplitude, and a characteristic bipolar shape in nearby E-change observations. In the time between IB pulses, the initial leader is very dim or not visible during the earliest 1-2 ms of the IB stage. Over the next few milliseconds, the leader propagation transitions to an early SL phase, in which the leader tips advance 20-59 m forward at more regular intervals of 40-80 μs during relatively dim and brief steps. In the E-change data, the accompanying SL pulses have very short duration, small amplitude, and are typically unipolar. These data indicate that when the entire initial leader length behind the lower end begins to remain illuminated between bursts, the propagation mode changes from IB bursts to SL steps, and the IB stage ends. Additional differences in initial leader character are evident during the return stroke, as its luminosity speed decreases sharply upon reaching the topmost initial leader section of the channel, and that section of channel does not saturate the video intensity. Results of these analyses support a prior hypothesis that the early initial leader development occurs in the absence of a continuously hot channel, and consequently, the initial leader propagation is unlike the self-propagating advance of the later stepped leader.

Upward Bound Math-Science: Program Description and Interim Impact Estimates

ERIC Educational Resources Information Center

Olsen, Robert; Seftor, Neil; Silva, Tim; Myers, David; DesRoches, David; Young, Julie

2007-01-01

To help address continuing disparities in academic achievement and under-representation of disadvantaged groups in math and science majors and careers, the U.S. Department of Education (ED) established a math and science initiative in 1990 within Upward Bound, a federal grant program known as Upward Bound Math-Science (UBMS) designed to provide…

Recovery of gravitropism after basipetal centrifugation in protonemata of the moss Ceratodon purpureus

NASA Technical Reports Server (NTRS)

Walker, L. M.; Sack, F. D.

1991-01-01

Apical cells of 5-day-old dark-grown protonemata of the moss Ceratodon purpureus (Hedw.) Brid. are negatively gravitropic and appear to utilize amyloplasts as statoliths. These cells exhibit a characteristic plastid zonation (five zones) with one zone (No. 3) specialized for the lateral sedimentation of amyloplasts. Basipetal centrifugation displaces all amyloplasts in the apical cell to the end wall. In basipetally centrifuged protonemata observed using infrared videomicroscopy, tip extension occurred with or without amyloplasts present in the apical dome. The initial return of upward curvature was always correlated with the return and sedimentation of amyloplasts in zone 3. Subsequent vigorous upward curvature was correlated with distinct amyloplast zonation and further sedimentation in zone 3. Initial downward ("wrong way") curvature, which often preceded upward curvature, correlated with the presence of amyloplasts in the apical dome (zone 1). These data support the hypotheses that nonsedimenting amyloplasts in zone 1 are necessary for initial downward curvature and that amyloplast sedimentation in zone 3 is necessary for upward curvature.

Upwardly Mobile Working-Class Adolescents: A Biographical Approach on Habitus Dislocation

ERIC Educational Resources Information Center

Christodoulou, Michael; Spyridakis, Manos

2017-01-01

Habitus dislocation is a much debatable term. By presenting life-histories of working-class adolescents, this article argues (i) that not all upwardly mobile working-class adolescents experience habitus dislocation and, (ii) that habitus dislocation has its roots in the self-initiated ruptures that face some of those who want to be upwardly mobile…

An Analysis of Two Thunderstorms Producing Five Negative Sprites on 12 September 2014

NASA Astrophysics Data System (ADS)

Boggs, L.; Liu, N.; Splitt, M. E.; Lazarus, S. M.; Cummer, S. A.; Rassoul, H.

2015-12-01

We present a detailed analysis of the thunderstorms and the parent lightning discharge morphologies of five confirmed negative sprites taking place in two different thunderstorms. These two thunderstorms took place in east-central and south Florida on 12 September 2014. We utilized several lightning location networks, remote magnetic field measurements, dual polarization radar, and balloon borne soundings in our analysis. Each parent discharge was immediately preceded by intra-cloud (IC) discharges between the mid-level negative and upper positive charge regions. This either allowed a second upward negative leader to escape the upper positive charge region, or encouraged a downward negative leader to be initiated and connect with ground. The discharges found in this study support the findings of Lu et al., 2012 [JGR,117, D04212, 2012] that negative sprite-parent lightning consists primarily of hybrid intra-cloud negative cloud-to-ground (IC-NCG) and bolt-from-the-blue (BFB) lightning. Our work finds these unique discharges form in thunderstorms that have an excess of mid-level negative charge and weakened upper positive charge. Due to this charge structure, these unusual discharges transfer more charge to the ground than typical negative cloud-to-ground discharges. Our study suggests that the key difference separating bolt-from-the-blue and gigantic jet discharges is an asymmetric charge structure. This acts to bring the negative leader exiting the thundercloud closer to the lateral positive screening layer, encouraging the negative leader to turn towards ground. This investigation reveals IC discharges that involve multiple convective cells and come to ground as a negative CG discharge, a breed of hybrid IC-NCG discharges, also transfer more negative charge to ground than typical negative CG discharges and are able to initiate negative sprites. From this work, the charge structures mentioned above resulted from tall, intense convective cells with low CG flash rates with high wind shear in the mid to upper regions of the cloud. This acted to create a large reservoir of mid-level negative charge and create a general asymmetry to the charge structure. The wind shear in the upper regions also acted to weaken the upper positive charge by turbulent mixing with the upper negative screening charge layer.

Administrators and Principals and the Implementation Process of the Leader in Me Initiative

ERIC Educational Resources Information Center

Bryant, Naarah

2016-01-01

Principals and administrators are crucial to the success of an initiative such as the Leader in Me. The purpose of this basic qualitative study was to identify the strategies, practices, and processes utilized by elementary school principals to initiate and implement initiatives or programs such as the Leader in Me. Eight elementary school…

Five Years on: Leadership Challenges of an Experienced CEO

ERIC Educational Resources Information Center

Sarros, James C.; Sarros, Anne M.

2011-01-01

Experienced leaders face challenges that demand different leadership approaches to those of inexperienced leaders. The purposes of this article are to: (1) explore the leadership initiatives prominent for experienced leaders compared with inexperienced leaders; (2) examine the relationship between transformational leadership and these initiatives;…

Leader emergence through interpersonal neural synchronization.

PubMed

Jiang, Jing; Chen, Chuansheng; Dai, Bohan; Shi, Guang; Ding, Guosheng; Liu, Li; Lu, Chunming

2015-04-07

The neural mechanism of leader emergence is not well understood. This study investigated (i) whether interpersonal neural synchronization (INS) plays an important role in leader emergence, and (ii) whether INS and leader emergence are associated with the frequency or the quality of communications. Eleven three-member groups were asked to perform a leaderless group discussion (LGD) task, and their brain activities were recorded via functional near infrared spectroscopy (fNIRS)-based hyperscanning. Video recordings of the discussions were coded for leadership and communication. Results showed that the INS for the leader-follower (LF) pairs was higher than that for the follower-follower (FF) pairs in the left temporo-parietal junction (TPJ), an area important for social mentalizing. Although communication frequency was higher for the LF pairs than for the FF pairs, the frequency of leader-initiated and follower-initiated communication did not differ significantly. Moreover, INS for the LF pairs was significantly higher during leader-initiated communication than during follower-initiated communications. In addition, INS for the LF pairs during leader-initiated communication was significantly correlated with the leaders' communication skills and competence, but not their communication frequency. Finally, leadership could be successfully predicted based on INS as well as communication frequency early during the LGD (before half a minute into the task). In sum, this study found that leader emergence was characterized by high-level neural synchronization between the leader and followers and that the quality, rather than the frequency, of communications was associated with synchronization. These results suggest that leaders emerge because they are able to say the right things at the right time.

Stuck between a rock and a hard place: the work situation for nurses as leaders in municipal health care

PubMed Central

Nilsen, Etty R; Olafsen, Anja H; Steinsvåg, Anne Grethe; Halvari, Hallgeir; Grov, Ellen K

2016-01-01

Background The paper aims to present how nursing leaders in the municipal health care perceive the interaction with and support from their superiors and peers. The paper further aims to identify the leaders’ vulnerability and strength at work in the current situation of shortage of manpower and other resources in the health care sector. This is seen through the lens of self-determination theory. Methods Qualitative interviews were conducted with nine nursing leaders in nursing homes and home-care services, which, in part, capture the municipal health care service in a time of reform. Results The nursing leaders are highly independent regarding their role as leaders. They act with strength and power in their position as superiors for their own staff, but they lack support and feel left alone by their leader, the municipal health director. The relation between the nursing leaders and their superiors is characterized by controlling structures and lack of autonomy support. As a consequence, the nursing leaders’ relations with subordinates and particularly peers, contribute to satisfy their needs for competence and relatedness, and, to some extent, autonomy. However, this cannot substitute for the lack of support from the superior level. Conclusion The paper maintains a need to increase the consciousness of the value of horizontal support and interaction with peers and subordinates for the municipal nursing leader. Also, the need for increased focus on “the missing link” upward between the municipal health director and the nursing leader is revealed. The impact of extensive controlling structures and lack of autonomy support from superiors might lead to reduced motivation and well-being. PMID:27103816

The Impacts of Upward Bound Math-Science on Postsecondary Outcomes 7-9 Years after Scheduled High School Graduation: Final Report

ERIC Educational Resources Information Center

Seftor, Neil S.; Calcagno, Juan Carlos

2010-01-01

This final report updates the report "Upward Bound Math-Science: Program Description and Interim Impact Estimates" published in 2007 (Olsen et al. 2007). The 2007 interim report contained descriptive findings from a survey of Upward Bound Math-Science (UBMS) grantees from the late 1990s at the time of the study's initiation and impact estimates…

The Extreme-Technology Industry

NASA Astrophysics Data System (ADS)

Hoefflinger, Bernd

The persistent annual R&D quota of >15% of revenue in the semiconductor industry has been and continues to be more than twice as high as the OECD definition for High-Technology Industry. At the frontiers of miniaturization, the Cost-of-Ownership (COO) continues to rise upwards to beyond 10 billion for a Gigafactory. Only leaders in the world market for selected processors and memories or for foundry services can afford this. Others can succeed with high-value custom products equipped with high-performance application-specific standard products acquired from the leaders in their specific fields or as fabless original-device manufacturers buying wafers from top foundries and packaging/testing from contract manufacturers, thus eliminating the fixed cost for a factory. An overview is offered on the leaders in these different business models. In view of the coming highly diversified and heterogeneous world of nanoelectronic-systems competence, the point is made for global networks of manufacturing and services with the highest standards for product quality and liability.

Alternative Fuels Data Center: Coalition Leader Establishes Unique

Science.gov Websites

Initiatives to Effect Change and Protect Ecosystem Coalition Leader Establishes Unique Initiatives to Effect Change and Protect Ecosystem to someone by E-mail Share Alternative Fuels Data Center : Coalition Leader Establishes Unique Initiatives to Effect Change and Protect Ecosystem on Facebook Tweet

A comparison between initial continuous currents of different types of upward lightning

NASA Astrophysics Data System (ADS)

Wang, D.; Sawada, N.; Takagi, N.

2009-12-01

We have observed the lightning to a wind turbine and its lightning-protection tower for four consecutive winter seasons from 2005 to 2009. Our observation items include (1) thunderstorm electrical fields and lightning-caused electric field changes at multi sites around the wind turbine, (2) electrical currents at the bottom of the wind turbine and its lightning protection tower, (3) normal video and high speed image of lightning optical channels. Totally, we have obtained the data for 42 lightning that hit either on wind turbine or its lightning protection tower or both. Among these 42 lightning, 38 are upward lightning and 2 are downward lightning. We found the upward lightning can be sub-classified into two types. Type 1 upward lightning are self-triggered from a high structure, while type 2 lightning are triggered by a discharge occurred in other places which could be either a cloud discharge or a cloud-to-ground discharge (other-triggered). In this study, we have compared the two types of upward lightning in terms of initial continuous current rise time, peak current and charge transferred to the ground. We found that the initial current of self-triggered lightning tends to rise significantly faster and to a bigger peak value than the other-triggered lightning, although both types of lightning transferred similar amount of charge to the ground.

A model study of the plasma chemistry of stratospheric Blue Jets

NASA Astrophysics Data System (ADS)

Winkler, Holger; Notholt, Justus

2015-04-01

Stratospheric Blue Jets (BJs) are upward propagating discharges in the altitude range 15-40 km above thunderstorms. They appear as conical bodies of blue light originating at the top of thunderclouds and proceed upward with velocities of the order of 100 km/s. Electric discharges in the atmosphere are known to have chemical effects. Of particular interest is the liberation of atomic oxygen and the formation of reactive nitrogen radicals. We have used a numerical plasma chemistry model in order to simulate the chemical processes in stratospheric BJs. It was applied to BJ streamers in the altitude range 18-38 km. The model results show that there is a production of ozone from atomic oxygen liberated at the streamer tips. At the same time, significant amounts of nitric oxide are produced. Compared to earlier plasma chemistry simulations of BJ streamers, the production of NO and O3 is by orders of magnitude larger. Additionally, the chemical processes in the leader part of a BJ have been simulated for the first time. In the leader channel, driven by high-temperature reactions, the concentration of N2O and NO increases by several orders of magnitude, and there is a significant depletion of ozone. The model results might gain importance by the fact that the chemical perturbations in BJs are largest at altitudes of the stratospheric ozone layer.

Leader emergence through interpersonal neural synchronization

PubMed Central

Jiang, Jing; Chen, Chuansheng; Dai, Bohan; Shi, Guang; Ding, Guosheng; Liu, Li; Lu, Chunming

2015-01-01

The neural mechanism of leader emergence is not well understood. This study investigated (i) whether interpersonal neural synchronization (INS) plays an important role in leader emergence, and (ii) whether INS and leader emergence are associated with the frequency or the quality of communications. Eleven three-member groups were asked to perform a leaderless group discussion (LGD) task, and their brain activities were recorded via functional near infrared spectroscopy (fNIRS)-based hyperscanning. Video recordings of the discussions were coded for leadership and communication. Results showed that the INS for the leader–follower (LF) pairs was higher than that for the follower–follower (FF) pairs in the left temporo-parietal junction (TPJ), an area important for social mentalizing. Although communication frequency was higher for the LF pairs than for the FF pairs, the frequency of leader-initiated and follower-initiated communication did not differ significantly. Moreover, INS for the LF pairs was significantly higher during leader-initiated communication than during follower-initiated communications. In addition, INS for the LF pairs during leader-initiated communication was significantly correlated with the leaders’ communication skills and competence, but not their communication frequency. Finally, leadership could be successfully predicted based on INS as well as communication frequency early during the LGD (before half a minute into the task). In sum, this study found that leader emergence was characterized by high-level neural synchronization between the leader and followers and that the quality, rather than the frequency, of communications was associated with synchronization. These results suggest that leaders emerge because they are able to say the right things at the right time. PMID:25831535

Breaking the Glass Ceiling in Oklahoma Higher Education: A Case Study of Kate Galt Zaneis, the First Woman President of a Public Four-Year College or University in the United States

ERIC Educational Resources Information Center

Smarr, Debbie L.

2011-01-01

Women's leadership within higher education continues to be the focus of research and essays. A look into the lives of past women leaders in higher education can provide a potential "road-map" for aspiring women to follow as they develop their leadership style to aid in their upward mobility. The study of the first woman to lead a public…

Electrical and Hydrometeor Structure of Thunderstorms that produce Upward Lightning

NASA Astrophysics Data System (ADS)

dos Santos Souza, J. C.; Albrecht, R. I.; Lang, T. J.; Saba, M. M.; Warner, T. A.; Schumann, C.

2017-12-01

Upward lightning (UL) flashes at tall structures have been reported to be initiated by in-cloud branching of a parent positive cloud-to-ground (CG) or intracloud (IC) lightning during the decaying stages of thunderstorms, and associated with stratiform precipitation. This in-cloud branching of the parent CG lightning into lower layers of the stratiform precipitation, as well as other situational modes of UL triggering, are indicative of a lower charge center. The objective of this study is to determine the hydrometeor characteristics of thunderstorms that produce UL, especially at the lower layers of the stratiform region where the bidirectional leader of the parent CG or IC lightning propagates through. We investigated 17 thunderstorms that produced 56 UL flashes in São Paulo, SP, Brazil and 10 thunderstorms (27 UL) from the UPLIGHTS field experiment in Rapid City, SD, USA. We used polarimetric radar data and 3D lighting mapping or the combination of total (i.e., intracloud and cloud-to-ground) and cloud-to-ground lightning strokes data. The Hydrometeor Identification for the thunderstorms of this study consider the information from polarimetric variables ZH, ZDR, KDP and RHOHV to infer radar echoes into rain (light, medium, heavy), hail, dry snow, wet snow, ice crystals, graupel and rain-hail mixtures. Charge structure is inferred by the 3D very-high-frequency (VHF) Lightning Mapping Array by monitoring lightning propagation closely in time and space and constructing vertical histograms of VHF source density. The results of this research project are important to increase the understanding of the phenomenon, the storm evolution and the predictability of UL.

Upward gaze and head deviation with frontal eye field stimulation.

PubMed

Kaiboriboon, Kitti; Lüders, Hans O; Miller, Jonathan P; Leigh, R John

2012-03-01

Using electrical stimulation to the deep, most caudal part of the right frontal eye field (FEF), we demonstrate a novel pattern of vertical (upward) eye movement that was previously only thought possible by stimulating both frontal eye fields simultaneously. If stimulation was started when the subject looked laterally, the initial eye movement was back to the midline, followed by upward deviation. Our finding challenges current view of topological organisation in the human FEF and may have general implications for concepts of topological organisation of the motor cortex, since sustained stimulation also induced upward head movements as a component of the vertical gaze shift. [Published with video sequences].

Questions Students Ask: About Terminal Velocity.

ERIC Educational Resources Information Center

Meyer, Earl R.; Nelson, Jim

1984-01-01

If a ball were given an initial velocity in excess of its terminal velocity, would the upward force of air resistance (a function of velocity) be greater than the downward force of gravity and thus push the ball back upwards? An answer to this question is provided. (JN)

75 FR 61747 - Union Leader Corporation; Supplemental Notice That Initial Market-Based Rate Filing Includes...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-06

... of Union Leader Corporation's application for market-based rate authority, with an accompanying rate... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. ER10-2780-000] Union Leader Corporation; Supplemental Notice That Initial Market-Based Rate Filing Includes Request for Blanket Section...

The physics of lightning

NASA Astrophysics Data System (ADS)

Dwyer, Joseph R.; Uman, Martin A.

2014-01-01

Despite being one of the most familiar and widely recognized natural phenomena, lightning remains relatively poorly understood. Even the most basic questions of how lightning is initiated inside thunderclouds and how it then propagates for many tens of kilometers have only begun to be addressed. In the past, progress was hampered by the unpredictable and transient nature of lightning and the difficulties in making direct measurements inside thunderstorms, but advances in instrumentation, remote sensing methods, and rocket-triggered lightning experiments are now providing new insights into the physics of lightning. Furthermore, the recent discoveries of intense bursts of X-rays and gamma-rays associated with thunderstorms and lightning illustrate that new and interesting physics is still being discovered in our atmosphere. The study of lightning and related phenomena involves the synthesis of many branches of physics, from atmospheric physics to plasma physics to quantum electrodynamics, and provides a plethora of challenging unsolved problems. In this review, we provide an introduction to the physics of lightning with the goal of providing interested researchers a useful resource for starting work in this fascinating field. By what physical mechanism or mechanisms is lightning initiated in the thundercloud? What is the maximum cloud electric field magnitude and over what volume of the cloud? What, if any, high energy processes (runaway electrons, X-rays, gamma rays) are involved in lightning initiation and how? What is the role of various forms of ice and water in lightning initiation? What physical mechanisms govern the propagation of the different types of lightning leaders (negative stepped, first positive, negative dart, negative dart-stepped, negative dart-chaotic) between cloud and ground and the leaders inside the cloud? What is the physical mechanism of leader attachment to elevated objects on the ground and to the flat ground? What are the characteristics of upward connecting leaders from those objects or from the ground? What is the physics of compact intra-cloud discharges (CIDs) (that produce a narrow bipolar wideband electric field pulse, a narrow bipolar event or NBE, apparently multiple-reflecting propagating waves within 1 km height, and copious HF and VHF radiation)? How are CIDs related to other types of preliminary breakdown pulses? Are CIDs related to the Terrestrial Gamma-Ray Flashes (TGFs) observed on orbiting satellites or to the Transient Luminous Events (TLEs) photographed above cloud tops, particularly to so-called “gigantic jets”? By what physical mechanisms do lightning leaders emit pulses of X-rays? Do the X-rays play a role in lightning propagation? By what mechanism do thunderclouds generate relatively-steady internal X-rays? Do X-rays and other high energy radiation affect cloud electrification and play a role in lightning initiation? By what physical mechanisms are Terrestrial Gamma-Ray Flashes (TGFs) produced? Do TGFs pose a hazard to individuals in aircraft? How do cloud-to-ground and intra-cloud lightning affect the upper atmosphere and ionosphere? What are the physics of the Transient Luminous Events (TLEs), “Sprites”, “jets”, and “elves”? What is the energy input into the ionosphere/magnetosphere from lightning? How exactly does rocket-and-wire (“classical” with a grounded wire and “altitude” with a floating wire) triggering of lightning work? Are there other possible and practical triggering techniques such as laser triggering? Can triggering reduce or eliminate the local occurrence of natural lightning? What are the power and energy of the component processes of lightning flashes and how are they distributed among electromagnetic processes (DC to light), thermal processes, mechanical (acoustic) processes, and relativistic (high energy) processes (runaway electrons, runaway positrons, X-ray, and gamma rays)? What is the physics of ball lightning? Is there more than one type of ball lightning? Questions 1, 2, 4, 5, 6, and 7 will be addressed directly in the following sections of this paper: Section 3. The Lightning Initiation Problem; Section 4. Lightning Propagation; Section 5. High-Energy Atmospheric Physics; Section 6. CIDs; and Section 7. TLEs.

Looking ahead to our next generation of nurse leaders: Generation X Nurse Managers.

PubMed

Keys, Yolanda

2014-01-01

The present inquiry identifies elements of professional success, and personal and professional fulfilment as defined by Generation X Nurse Managers. Although work concerning Nurse Manager preparation has been documented, there is a paucity of research specific to the generation of nurses next in line to assume leadership roles. For the purposes of this study, a qualitative approach was used to develop insight regarding Generation X Nurse Managers and their perspectives on professional success, personal and professional fulfilment, and organisational environments that are conducive to loyalty and long-term professional commitment. Findings from this study reinforced those identified in the original study in that inflexible organisational cultures, a lack of opportunities for upward mobility, the need to be available at all times, feeling stereotyped or undervalued can all be barriers to members of Generation X perceptions of professional success and professional and personal fulfilment. Study findings suggest that Generation X Nurse Managers would benefit from initiatives focused on better preparation for the Nurse Manager role, openness to innovative scheduling alternatives and tailored support and feedback. © 2014 John Wiley & Sons Ltd.

Lifting the Veil: A Realist Critique of Sistema's Upwardly Mobile Path

ERIC Educational Resources Information Center

Logan, Owen

2016-01-01

El Sistema sits somewhere between a social project and a classical music initiative. However, its promise of delivering upward mobility has not been sufficiently examined as a structural phenomenon which dovetails with critical policy issues in taxation, educational provision, human rights, and welfare. This article argues that Sistema-style…

Valuation and handling of dialogue in leadership: a grounded theory study in Swedish hospitals.

PubMed

Grill, C; Ahlborg, G; Lindgren, E C

2011-01-01

Leadership can positively affect the work environment and health. Communication and dialogue are an important part in leadership. Studies of how dialogue is valued and handled in first-line leadership have not so far been found. The aim of this study is to develop a theoretical understanding of how first-line leaders at hospitals in western Sweden value and handle dialogue in the organisation. The study design was explorative and based on grounded theory. Data collection consisted of interviews and observations. A total of 11 first-line leaders at two hospitals in western Sweden were chosen as informants, and for four of them observation was also used. One core category emerged in the analysis: leaders' communicative actions, which could be strategically or understanding-oriented, and experienced as equal or unequal and performed equitably or inequitably, within a power relationship. Four different types of communicativeactions emerged: collaborative, nurturing, controlling, and confrontational. Leaders had strategies for creating arenas and relationships for dialogue, but dialogue could be constrained by external circumstances or ignorance of the frameworks needed to conduct and accomplish dialogue. First-line leaders should be offered guidance in understanding the consequences of consciously choosing and strengthening the communication component in leadership. The positive valuation of dialogue was not always manifest in practical action. One significant consequence of not using dialogue was that information with impact on organisational efficiency and finances was communicated upwards in the management system.

Granular compaction by fluidization

NASA Astrophysics Data System (ADS)

Tariot, Alexis; Gauthier, Georges; Gondret, Philippe

2017-06-01

How to arrange a packing of spheres is a scientific question that aroused many fundamental works since a long time from Kepler's conjecture to Edward's theory (S. F. Edwards and R.B.S Oakeshott. Theory of powders. Physica A, 157: 1080-1090, 1989), where the role traditionally played by the energy in statistical problems is replaced by the volume for athermal grains. We present experimental results on the compaction of a granular pile immersed in a viscous fluid when submited to a continuous or bursting upward flow. An initial fluidized bed leads to a well reproduced initial loose packing by the settling of grains when the high enough continuous upward flow is turned off. When the upward flow is then turned on again, we record the dynamical evolution of the bed packing. For a low enough continuous upward flow, below the critical velocity of fluidization, a slow compaction dynamics is observed. Strikingly, a slow compaction can be also observed in the case of "fluidization taps" with bursts of fluid velocity higher than the critical fluidization velocity. The different compaction dynamics is discussed when varying the different control parameters of these "fluidization taps".

An Exploratory Multiple-Case Study of the Experiences of Participants in Self-Initiated Peer Support Groups among School Leaders

ERIC Educational Resources Information Center

House, Collette R.

2016-01-01

School leaders commonly face issues of loneliness, isolation, burnout, and depression. The purpose of this qualitative multiple-case study was to explore self-initiated peer support group participation for professional impact and personal impact on school leaders facing issues of loneliness, isolation, stress, and burnout. This study provides an…

Shale oil recovery process

DOEpatents

Zerga, Daniel P.

1980-01-01

A process of producing within a subterranean oil shale deposit a retort chamber containing permeable fragmented material wherein a series of explosive charges are emplaced in the deposit in a particular configuration comprising an initiating round which functions to produce an upward flexure of the overburden and to initiate fragmentation of the oil shale within the area of the retort chamber to be formed, the initiating round being followed in a predetermined time sequence by retreating lines of emplaced charges developing further fragmentation within the retort zone and continued lateral upward flexure of the overburden. The initiating round is characterized by a plurality of 5-spot patterns and the retreating lines of charges are positioned and fired along zigzag lines generally forming retreating rows of W's. Particular time delays in the firing of successive charges are disclosed.

The Effect of Air Density on Atmospheric Electric Fields Required for Lightning Initiation from a Long Airborne Object

NASA Technical Reports Server (NTRS)

Bazelyan, E. M.; Aleksandrov, N. L.; Raizer, Yu. Pl.; Konchankov, A. M.

2006-01-01

The purpose of the work was to determine minimum atmospheric electric fields required for lightning initiation from an airborne vehicle at various altitudes up to 10 km. The problem was reduced to the determination of a condition for initiation of a viable positive leader from a conductive object in an ambient electric field. It was shown that, depending on air density and shape and dimensions of the object, critical atmospheric fields are governed by the condition for leader viability or that for corona onset. To establish quantitative criteria for reduced air densities, available observations of spark discharges in long laboratory gaps were analyzed, the effect of air density on leader velocity was discussed and evolution in time of the properties of plasma in the leader channel was numerically simulated. The results obtained were used to evaluate the effect of pressure on the quantitative relationships between the potential difference near the leader tip, leader current and its velocity; based on these relationships, criteria for steady development of a leader were determined for various air pressures. Atmospheric electric fields required for lightning initiation from rods and ellipsoidal objects of various dimensions were calculated at different air densities. It was shown that there is no simple way to extend critical ambient fields obtained for some given objects and pressures to other objects and pressures.

Taking Leadership in Initiating a Comprehensive US International Education Policy

ERIC Educational Resources Information Center

Lad, Kaetlyn

2008-01-01

A first step to ensuring that emerging school leaders possess the dispositions and skills necessary to be successful in a global community is for educational leaders to take initiative in moving toward a comprehensive Us International Education Policy. This article introduces possible steps to initiate such a policy.

Upward and downward facing high mass flux spray cooling with additives: A novel technique to enhance the heat removal rate at high initial surface temperature

NASA Astrophysics Data System (ADS)

Pati, A. R.; Kumar, A.; Mohapatra, S. S.

2018-06-01

The objective of the current work is to enhance the spray cooling by changing the orientation of the nozzle with different additives (acetone, methanol, ethanol, benzene, n-hexane, tween 20 and salt) in water. The experiments are carried out by upward, downward and both upward and downward facing sprays. The optimization result depicts that the spray produced by upward facing spray gives higher heat flux than the downward facing spray and also cooling by both the upward and downward facing spray simultaneously produces better result than the individual. Further experiments with both upward and downward facing spray by using different coolants reveal that in case of cooling by ethanol (500 ppm) + water mixture, the maximum enhancement of surface heat flux ( 2.57 MW/m2) and cooling rate (204 °C/s) is observed. However, the minimum surface heat flux is achieved in case of methanol (100 ppm) + water due to higher contact angle (710) among all the considered coolants.

Observations of lightning processes using VHF radio interferometry

NASA Technical Reports Server (NTRS)

Rhodes, C. T.; Shao, X. M.; Krehbiel, P. R.; Thomas, R.

1991-01-01

A single station, multiple baseline radio interferometer was used to locate the direction of VHF radiation from lightning discharges with microsec time resolution. Radiation source directions and electric field waveforms were analyzed for various types of breakdown events. These include initial breakdown and K type events of in-cloud activity, and the leaders of initial and subsequent strokes to ground and activity during and following return strokes. Radiation during the initial breakdown of a flash and in the early stages of initial leaders to ground is found to be similar. In both instances, the activity consists of localized bursts of radiation that are intense and slow moving. Motion within a given burst is unresolved by the interferometer. Radiation from in-cloud K type events is essentially the same as that from dart leaders; in both cases it is produced at the leading edge of a fast moving streamer that propagates along a well defined, often extensive path. K type events are sometimes terminated by fast field changes that are similar to the return stroke initiated by dart leaders; such K type events are the in-cloud analog of the dart leader return stroke process.

Video, LMA and ULF observations of a negative gigantic jet in North Texas

NASA Astrophysics Data System (ADS)

Bruning, E. C.; Cummer, S.; Palivec, K.; Lyons, W. A.; Chmielewski, V.; MacGorman, D. R.

2017-12-01

On 8 September 2016 at 0125:38 UTC video of a negative gigantic jet was captured from Hawley, TX. VHF Lightning Mapping Arrays in West Texas and Oklahoma also observed the parent flash (duration of about 1 s) and, for the first time, mapped dozens of points along ascending negative leaders, lasting about 50 ms, which extended well above cloud top to about 35 km MSL altitude. A few well-located VHF sources were also detected near 50 km. Together, the video and VHF observations provide additional confirmation of the altitude at which the leader-to-streamer transition takes place in gigantic jet discharges. ULF magnetic field data from the Duke iCMC network show a current excursion associated with the onset of the upward movement of negative charge and leaders in the VHF. As the gigantic jet reached its full height, current spiked to 80 kA, followed by several hundred milliseconds of continuing current of 10-20 kA. Total charge moment change was about 6000 C km. The storm complex produced predominantly negative large charge moment change events, which is characteristic of storms that produce negative gigantic jets.

Teacher Leader Model Standards: Implications for Preparation, Policy, and Practice

ERIC Educational Resources Information Center

Berg, Jill Harrison; Carver, Cynthia L.; Mangin, Melinda M.

2014-01-01

Teacher leadership is increasingly recognized as a resource for instructional improvement. Consequently, teacher leader initiatives have expanded rapidly despite limited knowledge about how to prepare and support teacher leaders. In this context, the "Teacher Leader Model Standards" represent an important development in the field. In…

Confounding factors in using upward feedback to assess the quality of medical training: a systematic review.

PubMed

Zhou, Anli Yue; Baker, Paul

2014-01-01

Upward feedback is becoming more widely used in medical training as a means of quality control. Multiple biases exist, thus the accuracy of upward feedback is debatable. This study aims to identify factors that could influence upward feedback, especially in medical training. A systematic review using a structured search strategy was performed. Thirty-five databases were searched. Results were reviewed and relevant abstracts were shortlisted. All studies in English, both medical and non-medical literature, were included. A simple pro-forma was used initially to identify the pertinent areas of upward feedback, so that a focused pro-forma could be designed for data extraction. A total of 204 articles were reviewed. Most studies on upward feedback bias were evaluative studies and only covered Kirkpatrick level 1-reaction. Most studies evaluated trainers or training, were used for formative purposes and presented quantitative data. Accountability and confidentiality were the most common overt biases, whereas method of feedback was the most commonly implied bias within articles. Although different types of bias do exist, upward feedback does have a role in evaluating medical training. Accountability and confidentiality were the most common biases. Further research is required to evaluate which types of bias are associated with specific survey characteristics and which are potentially modifiable.

Changes in commitment to change among leaders in home help services.

PubMed

Westerberg, Kristina; Tafvelin, Susanne

2015-07-06

The purpose of the this study was to explore the development of commitment to change among leaders in the home help services during organizational change and to study this development in relation to workload and stress. During organizational change initiatives, commitment to change among leaders is important to ensure the implementation of the change. However, little is known of development of commitment of change over time. The study used a qualitative design with semi-structured interviews with ten leaders by the time an organizational change initiative was launched and follow-up one year later. Thematic content analysis was used to analyze the interviews. Commitment to change is not static, but seems to develop over time and during organizational change. At the first interview, leaders had a varied pattern reflecting different dimensions of commitment to change. One year later, the differences between leaders' commitment to change was less obvious. Differences in commitment to change had no apparent relationship with workload or stress. The data were collected from one organization, and the number of participants were small which could affect the results on workload and stress in relation to commitment to change. It is important to support leaders during organizational change initiatives to maintain their commitment. One way to accomplish this is to use management team meetings to monitor how leaders perceive their situation. Qualitative, longitudinal and leader studies on commitment to change are all unusual, and taken together, this study shows new aspects of commitment.

Triggered lightning strikes to aircraft and natural intracloud discharges

NASA Technical Reports Server (NTRS)

Mazur, Vladislav

1989-01-01

The physical model of Mazur (1989) for triggering lightning strikes by aircraft was used to interpret the initiation of intracloud flashes observed by the French UHF-VHF interferometric system. It is shown that both the intracloud discharges and airplane-triggered lightning strikes were initiated by simultaneous bidirectional development of the negative stepped leader and the positive leader-continous current process. However, the negative stepped leader phase in triggered flashes is of shorter duration (tens of milliseconds), than that in intracloud flashes (usually hundreds of milliseconds). This is considered to be due to the fact that, on the aircraft there is a single initiation process, versus the numerous initiation processes that occur inside the cloud.

Better Buying Power Principles: What Are They

DTIC Science & Technology

2016-02-01

Principles What Are They? Frank Kendall Inevitably, whenever any senior leader embarks on a set of initiatives intended to improve an organization’s...the direction of the title of the initiative by various stakeholders who are trying to show the leader that they are aligned with his or her intent...policies—but they seldom outlast the leaders who spon- sor them, and the hype associated with them usually exceeds their value. The complexity of

Frequency, predictors, and economic impact of upward dose adjustment of infliximab in managed care patients with rheumatoid arthritis.

PubMed

Ollendorf, Daniel A; Massarotti, Elena; Birbara, Charles; Burgess, Somali Misra

2005-06-01

To examine dosing patterns and costs among rheumatoid arthritis (RA) patients newly treated with infliximab in a large national health care claims database. Using data from a proprietary database of pharmacy and medical claims for 75 U.S. health plans, RA patients newly treated with infliximab between June 2000 and June 2002 were selected and assigned an .index date. based on the first infusion. A pretreatment period of 6 months was created; patients were also followed for a minimum of 6 months after the initial infusion. Follow-up was allowed to vary beyond this minimum 6 months in order to preserve all available patient data. A maintenance number of infliximab vials was determined as of the second infusion; patients with 1 subsequent increase in vials used or 2 intervals between infusions of <49 days were considered to have had an upward dose adjustment. Differences (i.e., between those with upward dose adjustment and those with no upward dose) in patient characteristics were examined using descriptive statistics. In addition, time to upward dose adjustment and factors influencing its likelihood were analyzed using Kaplan-Meier and Cox proportional hazards techniques. Finally, differences in RA-related and unrelated costs (medication, outpatient, inpatient, and total, expressed in 2003 dollars) were examined using Wilcoxon rank-sum tests and were also stratified by a number of patient characteristics found to differ between the 2 groups. A total of 1,236 patients met all study entry criteria and were included in these analyses. One or more upward dose adjustments were experienced by 61.7% (N=762) of patients during an average of 15 months of follow-up (median =13 months, range=6 to 31 months). The majority (63.3%) of upward dose adjustments were due to increases in the number of billed vials. Median time to upward dose adjustment was 254 days and declined steadily based on year of initiation (from 330 days in 2000 to 224 days in 2002). Factors significantly influencing upward dose adjustment included pretreatment use of leflunomide, comorbid Crohn.s disease, and pretreatment liver function testing. During followup, patients in the upward dose adjustment group used a mean (SD) of 30.28 (20.90) vials of infliximab, compared with 15.90 (14.28) among those not adjusting dose (P<0.001). Annualized (i.e., standardized to a 365-day rate) RA-related costs were higher by more than 50% among patients with upward dose adjustment (SD $22,283 [$20,517] versus $14,425 [$10,828] for those without upward dose adjustment; P<0.001); differences were driven almost entirely by the costs of infliximab itself ($16,336 [$9,490] versus $9,573 [$6,790], P<0.001). In a cohort of managed care members with RA, upward dose adjustment with infliximab was frequent and appeared to occur earlier in the drug therapy in 2002 compared with 2000. Upward dose adjustment was associated with significant increases in drug treatment costs; therefore, payers and providers should consider the impact of current dosing trends when monitoring the use of biologics for autoimmune diseases.

High-speed plasma imaging: A lightning bolt

DOE Office of Scientific and Technical Information (OSTI.GOV)

Wurden, G.A.; Whiteson, D.O.

Using a gated intensified digital Kodak Ektapro camera system, the authors captured a lightning bolt at 1,000 frames per second, with 100-{micro}s exposure time on each consecutive frame. As a thunder storm approaches while darkness descended (7:50 pm) on July 21, 1994, they photographed lightning bolts with an f22 105-mm lens and 100% gain on the intensified camera. This 15-frame sequence shows a cloud to ground stroke at a distance of about 1.5 km, which has a series of stepped leaders propagating downwards, following by the upward-propagating main return stroke.

Power-Gen International offers industry leaders insight for competition

DOE Office of Scientific and Technical Information (OSTI.GOV)

Chambers, A.

1996-11-01

Stuck at the crossroads of deregulation, the US power generation market has marked time through 1996 with very little new construction or capacity. Utilities are bandaging existing systems and pinching every penny to build a war chest for the coming competition. Change is in the air, but it has been for several years now, and excess capacities are dwindling as demand continues to creep upward. Executives across the land are searching for an edge and praying for a sign-looking for an indication of when the stagnation will burst forth into a flurry of change.

On the coupling of convective updrafts prior to secondary eyewall formation in Hurricane Katrina (2005)

NASA Astrophysics Data System (ADS)

Garcia-Rivera, Jose M.; Lin, Yuh-Lang

2017-09-01

Hurricane Katrina (2005) was simulated by the Advanced Research Weather Research and Forecasting model to understand the mechanism of a secondary eyewall formation (SEF) prior to its last landfall. The storm underwent a series of structural changes that were deemed necessary for the concentric cycle to begin, which included (1) increased rainband activity outside the primary eyewall in the hours before, mostly related to an intensifying main feeder band, (2) close to initiation of the SEF, an updraft (explained by a pre-existing hypothesis) emerged outside the primary eyewall near the top of the boundary layer (BL), (3) this updraft then intensified and extended both upward and outward, while the storm intensified and approached SEF, (4) eventually, the updraft coupled with the upward motion associated with rainband-related convection near the SEF radius, and (5) once the alignment occurred, the deep updraft quickly organized to support deep convection that led to SEF within hours of initiation. The coupling of updrafts emanating from the BL with the environmental upward motion associated with the pre-existing rainband activity is proposed to be the key mechanism for the SEF initiation in this case.

Electrification in winter storms and the analysis of thunderstorm overflight data

NASA Technical Reports Server (NTRS)

Brook, Marx

1993-01-01

We have been focusing our study of electrification in winter storms on the lightning initiation process, making inferences about the magnitude of the electric fields from the initial pulses associated with breakdown, i.e., with the formation of the initial streamers. The essence of the most significant finding is as follows: (1) initial breakdown radiation pulses from stepped leaders prior to the first return stroke are very large, reaching values of 20-30 Volts/meter, comparable to return stroke radiation; and (2) the duration of the stepped leader, from the initial detectable radiation pulse to the return stroke onset, is very-short-ranging from a minimum 1.5 ms to a maximum of 4.5 ms. This past summer (June-August of 1991) we participated in the CAPE program at the Kennedy Space Center in order to acquire data on stepped leaders in summer storms with the same equipment used to get the winter storm data. We discovered that the vigorous leaders seen in winter so frequently were present in summer storms, although not as large in amplitude and certainly not as frequent.

Leadership, Diversity and the Campus Community.

ERIC Educational Resources Information Center

Chahin, Jaime

To develop and implement diversity initiatives in the university community requires the effective implementation of initiatives in many areas. Diversity leaders should be cognizant of institutional values and attitudes and the vision espoused by the university's president. The diversity leader should inform the university community about…

The "sticking period" in a maximum bench press.

PubMed

van den Tillaar, Roland; Ettema, Gertjan

2010-03-01

The purpose of this study was to examine muscle activity and three-dimensional kinematics in the ascending phase of a successful one-repetition maximum attempt in bench press for 12 recreational weight-training athletes, with special attention to the sticking period. The sticking period was defined as the first period of deceleration of the upward movement (i.e. from the highest barbell velocity until the first local lowest barbell velocity). All participants showed a sticking period during the upward movement that started about 0.2 s after the initial upward movement, and lasted about 0.9 s. Electromyography revealed that the muscle activity of the prime movers changed significantly from the pre-sticking to the sticking and post-sticking periods. A possible mechanism for the existence of the sticking period is the diminishing potentiation of the contractile elements during the upward movement together with the limited activity of the pectoral and deltoid muscles during this period.

Acute effects of scapular mobilization in shoulder dysfunction: a double-blind randomized placebo-controlled trial.

PubMed

Surenkok, Ozgur; Aytar, Aydan; Baltaci, Gul

2009-11-01

The aim of this study was to evaluate the initial effects of scapular mobilization (SM) on shoulder range of motion (ROM), scapular upward rotation, pain, and function. Pretest-posttest for 3 groups (SM, sham, and control). A double-blinded, randomized, placebo-controlled trial was conducted to evaluate the initial effect of the SM at a sports physiotherapy clinic. 39 subjects (22 women, 17 men; mean age 54.30 +/- 14.16 y, age range 20-77 y). A visual analog scale, ROM, scapular upward rotation, and function were assessed before and just after SM. SM (n = 13) consisted of the application of superoinferior gliding, rotations, and distraction to the scapula. The sham (n = 13) condition replicated the treatment condition except for the hand positioning. The control group (n = 13) did not undergo any physiotherapy and rehabilitation program. Pain severity was assessed with a visual analog scale. Scapular upward rotation was measured with a baseline digital inclinometer. Constant Shoulder Score (CSS) was used to measure shoulder function. After SM, we found significant improvements for shoulder ROM, scapular upward rotation, and CSS between pretreatment and posttreatment compared with the sham and control groups. In the sham group, shoulder-ROM values increased or decreased for the shoulder and scapular upward rotation was not changed. Pain, ROM, and physical function of the shoulder were not significantly different in the sham group than in controls (P > .05). SM may be a useful manual therapy technique to apply to participants with a painful limitation of the shoulder. SM increases ROM and decreases pain intensity.

Ripple effects of reform on capital financing.

PubMed

Arduino, Kelly

2014-05-01

Healthcare leaders should inventory and quantify the capital initiatives deemed critical for success under changing business models. Key considerations in planning such initiatives are opportunity costs and potential impact on productivity. Senior leaders also should create rolling five-year estimates of expenditures in addition to a one-year budget. Approaches to paying for such initiatives include borrowing from cash reserves, partnering to share cash and other resources, and developing new revenue sources derived from the initiatives themselves.

Making process improvement 'stick'.

PubMed

Studer, Quint

2014-06-01

To sustain gains from a process improvement initiative, healthcare organizations should: Explain to staff why a process improvement initiative is needed. Encourage leaders within the organization to champion the process improvement, and tie their evaluations to its outcomes. Ensure that both leaders and employees have the skills to help sustain the sought-after process improvements.

Finite-time and fixed-time leader-following consensus for multi-agent systems with discontinuous inherent dynamics

NASA Astrophysics Data System (ADS)

Ning, Boda; Jin, Jiong; Zheng, Jinchuan; Man, Zhihong

2018-06-01

This paper is concerned with finite-time and fixed-time consensus of multi-agent systems in a leader-following framework. Different from conventional leader-following tracking approaches where inherent dynamics satisfying the Lipschitz continuous condition is required, a more generalised case is investigated: discontinuous inherent dynamics. By nonsmooth techniques, a nonlinear protocol is first proposed to achieve the finite-time leader-following consensus. Then, based on fixed-time stability strategies, the fixed-time leader-following consensus problem is solved. An upper bound of settling time is obtained by using a new protocol, and such a bound is independent of initial states, thereby providing additional options for designers in practical scenarios where initial conditions are unavailable. Finally, numerical simulations are provided to demonstrate the effectiveness of the theoretical results.

Empowering Teacher Literacy Leaders: Examining the Profiles and Influence of Five Literacy Leaders within a Change Initiative

ERIC Educational Resources Information Center

Ruller, Margaret M.

2013-01-01

The purpose of this qualitative study was to: (1) examine the profiles of teacher literacy leaders; (2) explore the empowerment of teacher literacy leaders through professional development and a distributed leadership model at the building level; (3) examine the impact of context on their leadership roles; and, (4) determine their potential…

Entry and Transition to Academic Leadership: Experiences of Women Leaders from Turkey and the U.S.

ERIC Educational Resources Information Center

Hacifazlioglu, Ozge

2010-01-01

Academics who aspire to become academic leaders experience a number of changes as they move into administration. New academic leaders find themselves immersed in a transition that demands personal development and creates new learning settings. The purpose of this study is to examine initial challenges experienced by women academic leaders in the…

Characteristics of Lightning Within Electrified Snowfall Events Using Lightning Mapping Arrays

NASA Astrophysics Data System (ADS)

Schultz, Christopher J.; Lang, Timothy J.; Bruning, Eric C.; Calhoun, Kristin M.; Harkema, Sebastian; Curtis, Nathan

2018-02-01

This study examined 34 lightning flashes within four separate thundersnow events derived from lightning mapping arrays (LMAs) in northern Alabama, central Oklahoma, and Washington DC. The goals were to characterize the in-cloud component of each lightning flash, as well as the correspondence between the LMA observations and lightning data taken from national lightning networks like the National Lightning Detection Network (NLDN). Individual flashes were examined in detail to highlight several observations within the data set. The study results demonstrated that the structures of these flashes were primarily normal polarity. The mean area encompassed by this set of flashes is 375 km2, with a maximum flash extent of 2,300 km2, a minimum of 3 km2, and a median of 128 km2. An average of 2.29 NLDN flashes were recorded per LMA-derived lightning flash. A maximum of 11 NLDN flashes were recorded in association with a single LMA-derived flash on 10 January 2011. Additionally, seven of the 34 flashes in the study contain zero NLDN-identified flashes. Eleven of the 34 flashes initiated from tall human-made objects (e.g., communication towers). In at least six lightning flashes, the NLDN detected a return stroke from the cloud back to the tower and not the initial upward leader. This study also discusses lightning's interaction with the human-built environment and provides an example of lightning within heavy snowfall observed by Geostationary Operational Environmental Satellite-16's Geostationary Lightning Mapper.

Characteristics of Lightning within Electrified Snowfall Events using Lightning Mapping Arrays.

PubMed

Schultz, Christopher J; Lang, Timothy J; Bruning, Eric C; Calhoun, Kristin M; Harkema, Sebastian; Curtis, Nathan

2018-02-27

This study examined 34 lightning flashes within four separate thundersnow events derived from lightning mapping arrays (LMAs) in northern Alabama, central Oklahoma, and Washington DC. The goals were to characterize the in-cloud component of each lightning flash, as well as the correspondence between the LMA observations and lightning data taken from national lightning networks like the National Lightning Detection Network (NLDN). Individual flashes were examined in detail to highlight several observations within the dataset. The study results demonstrated that the structures of these flashes were primarily normal polarity. The mean area encompassed by this set of flashes is 375 km 2 , with a maximum flash extent of 2300 km 2 , a minimum of 3 km 2 , and a median of 128 km 2 . An average of 2.29 NLDN flashes were recorded per LMA-derived lightning flash. A maximum of 11 NLDN flashes were recorded in association with a single LMA-derived flash on 10 January 2011. Additionally, seven of the 34 flashes in the study contain zero NLDN identified flashes. Eleven of the 34 flashes initiated from tall human-made objects (e.g., communication towers). In at least six lightning flashes, the NLDN detected a return stroke from the cloud back to the tower and not the initial upward leader. This study also discusses lightning's interaction with the human built environment and provides an example of lightning within heavy snowfall observed by GOES-16's Geostationary Lightning Mapper.

Bridge Builders: Teacher Leaders Forge Connections and Bring Coherence to Literacy Initiative

ERIC Educational Resources Information Center

Ippolito, Jacy; Dobbs, Christina L.; Charner-Laird, Megin

2014-01-01

This article describes an initiative designed to improve the content-area literacy skills of all students at a Massachusetts high school and to demonstrate the important role teacher leaders play in bridging the various elements of school improvement efforts. Meeting students' language and literacy needs within content-area classrooms is becoming…

Business Leaders Committing to and Fostering Sustainability Initiatives

ERIC Educational Resources Information Center

Rimanoczy, Isabel Beatriz

2010-01-01

The purpose of this study was to explore the processes and steps that business leaders go through as they champion sustainability initiatives, seeking to understand the learning strategies, knowledge and supports they found, as well as the mindset that helped them. This research contributes to an emerging body of knowledge that addresses the need…

Measuring School and Teacher Effectiveness in EPIC Charter School Consortium--Year 2. Final Report

ERIC Educational Resources Information Center

Potamites, Liz; Booker, Kevin; Chaplin, Duncan; Isenberg, Eric

2009-01-01

New Leaders for New Schools, a nonprofit organization committed to training school principals, heads the Effective Practices Incentive Community (EPIC), an initiative that offers financial awards to effective educators. Through this initiative, New Leaders offers financial awards to educators in two urban school districts and a consortium of…

Finance leadership imperatives in clinical redesign.

PubMed

Harris, John; Holm, Craig E; Inniger, Meredith C

2015-03-01

As physicians embrace their roles in managing healthcare costs and quality, finance leaders should seize the opportunity to engage physicians in clinical care redesign to ensure both high-quality performance and efficient resource use. Finance leaders should strike a balance between risk and reward to achieve a portfolio of clinical initiatives that is organizationally sustainable and responsive to current external drivers of payment changes. Because these initiatives should be driven by physicians, the new skill set of finance leaders should include an emphasis on relationship building to achieve consensus and drive change across an organization.

The Inspirational Leader

ERIC Educational Resources Information Center

Benigni, Mark D.; Hughes, Mark A

2012-01-01

Amid the focus on improved standardized test scores, differentiated instruction, value-added initiatives and improved teacher evaluation, one must not ignore an education leader's need to inspire and be inspired. But how do education leaders inspire their students and teachers during some of the most difficult economic times the nation has ever…

Creating tomorrow's leaders today: the Emerging Nurse Leaders Program of the Texas Nurses Association.

PubMed

Sportsman, Susan; Wieck, Lynn; Yoder-Wise, Patricia S; Light, Kathleen M; Jordan, Clair

2010-06-01

The Texas Nurses Association initiated an Emerging Nurse Leaders Program as an approach to engaging new nurses in the leadership of the professional association. This article explains the program's origin, the commitment of the Texas Nurses Association to this process, the implementation of the plan, and the discussions that launched a new way of connecting leaders across generations. Further, it is an approach that any professional organization can use to encourage the involvement of new leaders.

Fundamentals for New Leaders

DTIC Science & Technology

2015-06-12

in Initial Period) model is the author’s solution and a remedy for a new leader. The result of this research targets a particular audience―new...problem of being a first time leader is constant and present in all cultures. If it is a universal problem, there should be a solution on how to become

Links between Leader Cognition, Power, and Change on Community College Campuses

ERIC Educational Resources Information Center

Eddy, Pamela L.

2004-01-01

As organizational change at community colleges becomes the norm, presidents leading these campuses play a heightened role in guiding successful initiatives. The research reported here investigated the relationship between leader cognition and power levers of two presidents as they framed change for campus members. These leaders' underlying…

Using Multiple Forms of Data in Principal Evaluations: An Overview with Examples. Integrated Leadership Development Initiative

ERIC Educational Resources Information Center

Sanders, Nancy; Kearney, Karen; Vince, Scott

2012-01-01

The Integrated Leadership Development Initiative (ILDI) is a cross-agency partnership that focuses on collaboratively guiding and supporting leader development and improving conditions of leadership so that there are highly accomplished leaders in every district and school in California. In this brief, ILDI focuses on Principal Evaluations and…

Small Combat Arms Unit Leader Training Techniques: Rules of Play for Two Player/Multiplayer Infantry Mapboard Games.

DTIC Science & Technology

1979-01-01

exercises for leadership training. Initial efforts led to the development of a mapboard game. The ’board game’ initially developed was a two-sided, free ... play map exercise for teaching infantry tactics to small unit leaders at the platoon level organizations. It was found, however, that for the benefits

First-line nurse leaders' health-care change management initiatives.

PubMed

Macphee, Maura; Suryaprakash, Nitya

2012-03-01

To examine nurse leaders' change management projects within British Columbia, Canada. British Columbia Nursing Leadership Institute 2007-10 attendees worked on year-long change management initiatives/projects of importance to their respective health-care institutions. Most leaders were in first-line positions with <3 years' experience. Consenting leaders' project reports (N = 133) were content analysed for specific themes: types of projects; scope of projects (e.g. unit or local level, departmental, institutional); influence targets or key stakeholder groups targeted by the projects; leadership successes and challenges. Of study participants, 77% successfully completed their projects. Staff tool and resource development and existing services improvement were major project types. Care delivery teams were the major influence targets. Only 25% of projects were at the unit level. Many projects had broader scopes, such as institutional levels. Participants cited multiple leadership successes, including enhanced leadership styles and organizational skills. First-line nurse leaders were able to successfully manage projects beyond their traditional scope of responsibilities. The majority of projects dealt with staff needs and healthcare restructuring initiatives. Constant change is a global reality. Change management, a universal competency, must be included in leadership development programmes. © 2011 Blackwell Publishing Ltd.

Structural domains within the HIV-1 mRNA and the ribosomal protein S25 influence cap-independent translation initiation.

PubMed

Carvajal, Felipe; Vallejos, Maricarmen; Walters, Beth; Contreras, Nataly; Hertz, Marla I; Olivares, Eduardo; Cáceres, Carlos J; Pino, Karla; Letelier, Alejandro; Thompson, Sunnie R; López-Lastra, Marcelo

2016-07-01

The 5' leader of the HIV-1 genomic RNA is a multifunctional region that folds into secondary/tertiary structures that regulate multiple processes during viral replication including translation initiation. In this work, we examine the internal ribosome entry site (IRES) located in the 5' leader that drives translation initiation of the viral Gag protein under conditions that hinder cap-dependent translation initiation. We show that activity of the HIV-1 IRES relies on ribosomal protein S25 (eS25). Additionally, a mechanistic and mutational analysis revealed that the HIV-1 IRES is modular in nature and that once the 40S ribosomal subunit is recruited to the IRES, translation initiates without the need of ribosome scanning. These findings elucidate a mechanism of initiation by the HIV-1 IRES whereby a number of highly structured sites present within the HIV-1 5' leader leads to the recruitment of the 40S subunit directly at the site of initiation of protein synthesis. © 2016 Federation of European Biochemical Societies.

Structural domains within the HIV-1 mRNA and the ribosomal protein S25 influence cap-independent translation initiation

PubMed Central

Carvajal, Felipe; Vallejos, Maricarmen; Walters, Beth A.; Contreras, Nataly; Hertz, Marla I.; Olivares, Eduardo; Cáceres, C. Joaquín; Pino, Karla; Letelier, Alejandro; Thompson, Sunnie R.; López-Lastra, Marcelo

2016-01-01

The 5′leader of the HIV-1 genomic RNA is a multifunctional region that folds into secondary/tertiary structures that regulate multiple processes during viral replication including translation initiation. In this work we examine the internal ribosome entry site (IRES) located in the 5′leader that drives translation initiation of the viral Gag protein under conditions that hinder cap-dependent translation initiation. We show that activity of the HIV-1 IRES relies on ribosomal protein S25 (eS25). Additionally, a mechanistic and mutational analysis revealed that the HIV-1 IRES is modular in nature and that once the 40S ribosomal subunit is recruited to the IRES, translation initiates without the need of ribosome scanning. These findings elucidate a mechanism of initiation by the HIV-1 IRES whereby a number of highly structured sites present within the HIV-1 5′leader leads to the recruitment of the 40S subunit directly at the site of initiation of protein synthesis. PMID:27191820

77 FR 25042 - Small Business Investment Companies-Early Stage SBICs

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-27

... Initiative'' to encourage American innovation and job creation by promoting high-growth entrepreneurship across the country with new initiatives to help encourage private sector investment in job-creating... lack of current income, may put upward pressure on the CIP even though the fund's overall portfolio...

Leadership initiatives to disseminate the institute of medicine's future of nursing report.

PubMed

Folan, Patricia; Tarraza, Marianne DeCain; Delaney, Margaret; Fardellone, Christine; Leners, Colleen; Ross, Erin; Fitzpatrick, Joyce J

2012-02-01

This article discusses the critical role professional nurses will play and the tremendous impact nursing education and leadership development will have on the future of health care, as outlined in the recommendations of the Institute of Medicine's report, "The future of nursing: Leading change, and advancing health." Six doctorate of nursing practice students from Case Western Reserve University analyzed the Institute of Medicine (IOM) report and developed projects to disseminate key components to selected organizations. The students developed two primary initiatives. One initiative involved presenting the report to various professional organizations, including a local chapter of an international honor society, a specialty organization, and a health care organization. The second initiative included interviewing several nurse leaders within a large multihospital health system, and a nursing leader in academia to determine (a) the level of awareness about the IOM report and (b) strategies these leaders have implemented or envisioned to address the report recommendations.

Measuring Changes in Social Behavior during a Social Skills Intervention for Higher-Functioning Children and Adolescents with Autism Spectrum Disorder

PubMed Central

McMahon, Camilla M.; Vismara, Laurie A.; Solomon, Marjorie

2013-01-01

The social behavior of children and adolescents with Autism Spectrum Disorder was evaluated weekly over 19 weeks of a social skills training program. Participants’ vocalizations were coded as initiating, responding, or other (e.g., self-talk). Participants’ interactions were coded as dyadic peer interactions, dyadic leader interactions, interactions with a group of peers, interactions with a group of peer(s) and leader(s), or time spent by self. Over the course of the intervention, participants made fewer initiating and other vocalizations, more responding vocalizations, spent more time interacting with a group of peers, and spent marginally less time interacting with a leader. Gender, age, and intervention attendance effects on social behavior are also noted. PMID:23239098

Optical progression characteristics of an interesting natural downward bipolar lightning flash

NASA Astrophysics Data System (ADS)

Chen, Luwen; Lu, Weitao; Zhang, Yijun; Wang, Daohong

2015-01-01

high-speed cameras, Lightning Attachment Process Observation Systems, and fast and slow electrical antennas, we documented a downward bipolar lightning flash that contained one first positive stroke with a peak current of 142 kA and five subsequent negative strokes hitting on a 90 m tall structure on 29 July 2010 in Guangzhou City, China. All the six strokes propagated along the same viewed channel established by the first positive return stroke. The leader which preceded the positive return stroke propagated downward without any branches at a two-dimensional (2-D) speed of 2.5 × 106 m/s. An upward connecting leader with a length of about 80 m was observed in response to the downward positive leader. The 10-90% risetimes of the return strokes' optical pulses ranged from 2.2 µs to 3.2 µs, while the widths from the 10% wavefront to the 50% wave tail ranged from 56.5 µs to 83.1 µs, and the half peak widths ranged from 53.4 µs to 81.6 µs. All the return strokes exhibited similar speeds, ranging from 1.0 × 108 m/s to 1.3 × 108 m/s. Each of the return strokes was followed by a continuing current stage (CC). The first positive stroke CC lasted more than 150 ms, much larger than all the subsequent negative stroke CC, ranging from 13 ms to 70 ms.

Nurses' perspectives on how operational leaders influence function-focused care for hospitalised older people.

PubMed

Fox, Mary T; Butler, Jeffrey I

2016-11-01

To explore nurses' perspectives on how leaders influence function-focused care, defined as care that preserves and restores older people's functional abilities. Hospitalised older people are at risk of functional decline. Although leaders have the potential to influence function-focused care, few studies have explored nurses' perspectives on how leaders influence function-focused care. Thirteen focus groups were held with 57 acute care nurses. Semi-structured questions prompted discussion on nurses' perspectives, needs and strategies to meet their needs. Data were thematically analysed. Three themes were identified: (1) the emphasis in hospitals is on moving older people quickly through the system, not supporting their functioning; (2) leaders are generally seen as too disconnected from practice to design system efficiency initiatives that support older people's functioning and nurses' provisioning of function-focused care; and (3) leadership strategies to better support nurses in providing function-focused care to older people in the context of system efficiency. Leaders should connect with practice to devise age-sensitive efficiency initiatives that support function-focused care. Nurses need support from leaders in four areas to provide function-focused care to older people in the current hospital context. The findings provide direction on how leaders can facilitate function-focused care in the current health-care environment emphasising system efficiency. © 2016 John Wiley & Sons Ltd.

Transforming Leaders into Stewards of Teaching Excellence: Building and Sustaining an Academic Culture through Leadership Immersion

ERIC Educational Resources Information Center

Phillips, Candice; Bassell, Kellie; Fillmore, Laura; Stephenson, Winsome

2018-01-01

Nursing must transform education and practice to meet the changing healthcare environment; yet, steps to desired change remain unknown. Academic leaders are well-positioned to initiate change and transform the academic landscape. However, many advance to leadership positions with minimal orientation to the role. Moreover, leaders in academic…

Lending, Learning, Leading: Developing Results-Based Leaders in Opportunity Finance

ERIC Educational Resources Information Center

Annie E. Casey Foundation, 2015

2015-01-01

This report tells the story of the CDFI Leadership Learning Network, a Casey Foundation initiative to equip leaders of community development finance institutions with the tools of results-based leadership (RBL). The Foundation shares lessons learned from the network, core RBL concepts and profiles of CDFI leaders as they apply RBL skills and tools…

Upward appraisal as a means for improving supervisory performance and promoting process improvement, with long-term implications for organizational change

NASA Technical Reports Server (NTRS)

Siegfeldt, Denise V.

1994-01-01

This study represents the implementation phase of an organizational development project which was initiated last year in the Management Support Division (MSD) at Langley Research Center to diagnose organizational functioning. As a result of MSD survey data from last year's effort, a Quality Action Team was created to address the responses compiled from the MSD Organizational Assessment Questionnaire and Follow-Up Questionnaire. The team was officially named the MSD Employee Relations Improvement Team (MERIT). MERIT's goal was to analyze major concerns generated by the questionnaires and to present feasible solutions to management which would improve supervisory performance, promote process improvement; and ultimately, lead to a better organization. The team met weekly and was very disciplined in following guidelines needed to ensure a fully functioning team. Several TQM tools were used during the team process, including brainstorming and the cause and effect diagram. One of the products produced by MERIT was a 'report card', more formally known as an upward appraisal system, to evaluate supervisory performance in the division office, its three branches, and in teams. Major areas of emphasis on the 47 item report card were those identified by employees through the previously administered questionnaires as needing to be improved; specifically, training, recognition, teamwork, supervision and leadership, and communication. MERIT created an enlarged and modified version of the report card which enabled scores for each individual supervisor to be recorded on a separate form, along with summary results and employee comments. Report card results have been compiled and fed back to the Division Chief and Assistant Division Chief. These individuals will in turn, feed the results back to the remaining supervisors and the team leaders. Although results differ among supervisors, some similarities exist. Communication generally appears to be adequate, which represents an improvement over last year. In contrast, recognition and teamwork are the two major areas where improvement in supervisory performance seems to be most needed. The initial report card results will serve as a baseline against which future performance ratings will be compared. Once supervisors have been presented with their data and given an opportunity to analyze and discus the results, they will be assisted in developing an action plan for improving their performance and work processes. They will be provided with ongoing support from management in following through with the action plan.

High-performing trauma teams: frequency of behavioral markers of a shared mental model displayed by team leaders and quality of medical performance.

PubMed

Johnsen, Bjørn Helge; Westli, Heidi Kristina; Espevik, Roar; Wisborg, Torben; Brattebø, Guttorm

2017-11-10

High quality team leadership is important for the outcome of medical emergencies. However, the behavioral marker of leadership are not well defined. The present study investigated frequency of behavioral markers of shared mental models (SMM) on quality of medical management. Training video recordings of 27 trauma teams simulating emergencies were analyzed according to team -leader's frequency of shared mental model behavioral markers. The results showed a positive correlation of quality of medical management with leaders sharing information without an explicit demand for the information ("push" of information) and with leaders communicating their situational awareness (SA) and demonstrating implicit supporting behavior. When separating the sample into higher versus lower performing teams, the higher performing teams had leaders who displayed a greater frequency of "push" of information and communication of SA and supportive behavior. No difference was found for the behavioral marker of team initiative, measured as bringing up suggestions to other teammembers. The results of this study emphasize the team leader's role in initiating and updating a team's shared mental model. Team leaders should also set expectations for acceptable interaction patterns (e.g., promoting information exchange) and create a team climate that encourages behaviors, such as mutual performance monitoring, backup behavior, and adaptability to enhance SMM.

Growing Nurse Leaders: Their Perspectives on Nursing Leadership and Today’s Practice Environment

PubMed

Dyess, Susan M; Sherman, Rose O; Pratt, Beth A; Chiang-Hanisko, Lenny

2016-01-14

With the growing complexity of healthcare practice environments and pending nurse leader retirements, the development of future nurse leaders is increasingly important. This article reports on focus group research conducted with Generation Y nurses prior to their initiating coursework in a Master’s Degree program designed to support development of future nurse leaders. Forty-four emerging nurse leaders across three program cohorts participated in this qualitative study conducted to capture perspectives about nursing leaders and leadership. Conventional content analysis was used to analyze and code the data into categories. We discuss the three major categories identified, including: idealistic expectations of leaders, leading in a challenging practice environment, and cautious but optimistic outlook about their own leadership and future, and study limitations. The conclusion offers implications for future nurse leader development. The findings provide important insight into the viewpoints of nurses today about leaders and leadership.

Initial information prior to movement onset influences kinematics of upward arm pointing movements

PubMed Central

Pozzo, Thierry; White, Olivier

2016-01-01

To elaborate a motor plan and perform online control in the gravity field, the brain relies on priors and multisensory integration of information. In particular, afferent and efferent inputs related to the initial state are thought to convey sensorimotor information to plan the upcoming action. Yet it is still unclear to what extent these cues impact motor planning. Here we examined the role of initial information on the planning and execution of arm movements. Participants performed upward arm movements around the shoulder at three speeds and in two arm conditions. In the first condition, the arm was outstretched horizontally and required a significant muscular command to compensate for the gravitational shoulder torque before movement onset. In contrast, in the second condition the arm was passively maintained in the same position with a cushioned support and did not require any muscle contraction before movement execution. We quantified differences in motor performance by comparing shoulder velocity profiles. Previous studies showed that asymmetric velocity profiles reflect an optimal integration of the effects of gravity on upward movements. Consistent with this, we found decreased acceleration durations in both arm conditions. However, early differences in kinematic asymmetries and EMG patterns between the two conditions signaled a change of the motor plan. This different behavior carried on through trials when the arm was at rest before movement onset and may reveal a distinct motor strategy chosen in the context of uncertainty. Altogether, we suggest that the information available online must be complemented by accurate initial information. PMID:27486106

Initial information prior to movement onset influences kinematics of upward arm pointing movements.

PubMed

Rousseau, Célia; Papaxanthis, Charalambos; Gaveau, Jérémie; Pozzo, Thierry; White, Olivier

2016-10-01

To elaborate a motor plan and perform online control in the gravity field, the brain relies on priors and multisensory integration of information. In particular, afferent and efferent inputs related to the initial state are thought to convey sensorimotor information to plan the upcoming action. Yet it is still unclear to what extent these cues impact motor planning. Here we examined the role of initial information on the planning and execution of arm movements. Participants performed upward arm movements around the shoulder at three speeds and in two arm conditions. In the first condition, the arm was outstretched horizontally and required a significant muscular command to compensate for the gravitational shoulder torque before movement onset. In contrast, in the second condition the arm was passively maintained in the same position with a cushioned support and did not require any muscle contraction before movement execution. We quantified differences in motor performance by comparing shoulder velocity profiles. Previous studies showed that asymmetric velocity profiles reflect an optimal integration of the effects of gravity on upward movements. Consistent with this, we found decreased acceleration durations in both arm conditions. However, early differences in kinematic asymmetries and EMG patterns between the two conditions signaled a change of the motor plan. This different behavior carried on through trials when the arm was at rest before movement onset and may reveal a distinct motor strategy chosen in the context of uncertainty. Altogether, we suggest that the information available online must be complemented by accurate initial information. Copyright © 2016 the American Physiological Society.

Short ORF-Dependent Ribosome Shunting Operates in an RNA Picorna-Like Virus and a DNA Pararetrovirus that Cause Rice Tungro Disease

PubMed Central

Pooggin, Mikhail M.; Rajeswaran, Rajendran; Schepetilnikov, Mikhail V.; Ryabova, Lyubov A.

2012-01-01

Rice tungro disease is caused by synergistic interaction of an RNA picorna-like virus Rice tungro spherical virus (RTSV) and a DNA pararetrovirus Rice tungro bacilliform virus (RTBV). It is spread by insects owing to an RTSV-encoded transmission factor. RTBV has evolved a ribosome shunt mechanism to initiate translation of its pregenomic RNA having a long and highly structured leader. We found that a long leader of RTSV genomic RNA remarkably resembles the RTBV leader: both contain several short ORFs (sORFs) and potentially fold into a large stem-loop structure with the first sORF terminating in front of the stem basal helix. Using translation assays in rice protoplasts and wheat germ extracts, we show that, like in RTBV, both initiation and proper termination of the first sORF translation in front of the stem are required for shunt-mediated translation of a reporter ORF placed downstream of the RTSV leader. The base pairing that forms the basal helix is required for shunting, but its sequence can be varied. Shunt efficiency in RTSV is lower than in RTBV. But in addition to shunting the RTSV leader sequence allows relatively efficient linear ribosome migration, which also contributes to translation initiation downstream of the leader. We conclude that RTSV and RTBV have developed a similar, sORF-dependent shunt mechanism possibly to adapt to the host translation system and/or coordinate their life cycles. Given that sORF-dependent shunting also operates in a pararetrovirus Cauliflower mosaic virus and likely in other pararetroviruses that possess a conserved shunt configuration in their leaders it is tempting to propose that RTSV may have acquired shunt cis-elements from RTBV during their co-existence. PMID:22396650

Academic and Business Leaders' Perceptions of 21st Century Skills: An Exploratory Study

ERIC Educational Resources Information Center

Lawlor, Jennifer Lynne

2017-01-01

This study explored the academic and business leaders' perceptions of 21st century skills and to what degree do these perceptions align. The results from this study show that academic and business leaders share similar perceptions of 21st century skills and the majority of the shared skills are aligned. Through an initial survey and interviews,…

The Perceptions of Secondary School Middle Leaders Regarding Their Needs Following a Middle Leadership Development Programme

ERIC Educational Resources Information Center

Thorpe, Anthony; Bennett-Powell, Gay

2014-01-01

The importance of middle leaders in bringing about improvement in schools is well recognized in the UK, as in many other countries, with the ever-present demand for raising standards and achievement. This article outlines some initial findings and discussion points emerging from the first stage of a project exploring how middle leaders in…

Initial Movement and Continuity in Vibrato among High School and University String Players

ERIC Educational Resources Information Center

Geringer, John M.; Allen, Michael L.; MacLeod, Rebecca B.

2005-01-01

The purpose of the present study was to investigate aspects of vibrato performance among high school and university string players. The main questions were to determine whether students consistently initiate vibrato in an upward or downward direction and whether players vibrate continuously when performing slurs. Forty high school and university…

Rewetting of monogroove heat pipe in Space Station radiators

NASA Technical Reports Server (NTRS)

Chan, S. H.

1994-01-01

This annual report summarizes the work accomplished on rewetting of monogroove heat pipe in space station. Specifically, theoretical and experimental investigations of the rewetting characteristics of thin liquid films over unheated and heated capillary grooved plates were performed. To investigate the effect of gravity on rewetting, the grooved surface was placed in upward and downward facing positions. Profound gravitational effects were observed as the rewetting velocity was found to be higher in the upward than in the downward facing orientation. The difference was even greater with higher initial plate temperatures. With either orientation, it was found that the rewetting velocity increased with the initial plate temperature. But when the temperature was raised above a rewetting temperature, the rewetting velocity decreased with the initial plate temperature. Hydrodynamically controlled and heat conduction controlled rewetting models were then presented to explain and to predict the rewetting characteristics in these two distinct regions. The predicted rewetting velocities were found to be in good agreement with experimental data with elevated plate temperatures.

Informal leadership support: an often overlooked competitive advantage.

PubMed

Peters, L H; O'Connor, E J

2001-01-01

As environmental pressures mount, the advantage of using the same strategies and tactics employed by competitors continues to shrink. An alternative is adapting and applying answers successfully employed in other industries to health care organizations. Working with informal influence leaders to share your change management efforts represents one such example. Informal influence leaders offer an often-overlooked source of competitive advantage--they have already earned credibility and respect from others, who regularly look to them for guidance. When sharing their views, they significantly influence the acceptance or rejection of new initiatives. Influence leaders reach into every conversation, every meeting, and every decision made in an organization. The important question is whether they will exert their leadership in support or in opposition to changes you propose. By identifying influence leaders and inviting them to join a group to discuss change initiatives, physician executives can create a positive force for change.

Architects of Catholic Culture: Designing and Building Catholic Culture in Catholic Schools. The NCEA Catholic Educational Leadership Monograph Series.

ERIC Educational Resources Information Center

Cook, Timothy J.

Today's Catholic educational leaders are engaged in a building program, not unlike that of the Catholic religious leaders in the early- to mid-20th century who initiated and oversaw the building of scores of schools, hospitals, and other Catholic institutions. The goal for today's Catholic educational leaders is to design and build Catholic…

One Leader, One School and an Atypical South African Educational Landscape: The Pedagogical Viability of a Shared Technology Project

ERIC Educational Resources Information Center

van Jaarsveld, Leentjie; Mentz, P. J.; van der Walt, Johannes L.

2016-01-01

Visionary leaders shape their actions and initiate transformation to reach a specific goal. To do so is critically important in South Africa, where the education system offers limited opportunities to manage a school in a manner that deviates from the prescribed norm. School leaders typically encounter barriers such as the inadequacy of the…

Simulations of Dynamics and Transport during the September 2002 Antarctic Major Warming

NASA Technical Reports Server (NTRS)

Manney, Gloria L.; Sabutis, Joseph L.; Allen, Douglas R.; Lahoz, Willian A.; Scaife, Adam A.; Randall, Cora E.; Pawson, Steven; Naujokat, Barbara; Swinbank, Richard

2005-01-01

A mechanistic model simulation initialized on 14 September 2002, forced by 100-hPa geopotential heights from Met Office analyses, reproduced the dynamical features of the 2002 Antarctic major warming. The vortex split on approx.25 September; recovery after the warming, westward and equatorward tilting vortices, and strong baroclinic zones in temperature associated with a dipole pattern of upward and downward vertical velocities were all captured in the simulation. Model results and analyses show a pattern of strong upward wave propagation throughout the warming, with zonal wind deceleration throughout the stratosphere at high latitudes before the vortex split, continuing in the middle and upper stratosphere and spreading to lower latitudes after the split. Three-dimensional Eliassen-Palm fluxes show the largest upward and poleward wave propagation in the 0(deg)-90(deg)E sector prior to the vortex split (coincident with the location of strongest cyclogenesis at the model's lower boundary), with an additional region of strong upward propagation developing near 180(deg)-270(deg)E. These characteristics are similar to those of Arctic wave-2 major warmings, except that during this warming, the vortex did not split below approx.600 K. The effects of poleward transport and mixing dominate modeled trace gas evolution through most of the mid- to high-latitude stratosphere, with a core region in the lower-stratospheric vortex where enhanced descent dominates and the vortex remains isolated. Strongly tilted vortices led to low-latitude air overlying vortex air, resulting in highly unusual trace gas profiles. Simulations driven with several meteorological datasets reproduced the major warming, but in others, stronger latitudinal gradients at high latitudes at the model boundary resulted in simulations without a complete vortex split in the midstratosphere. Numerous tests indicate very high sensitivity to the boundary fields, especially the wave-2 amplitude. Major warmings occurred for initial fields with stronger winds and larger vortices, but not smaller vortices, consistent with the initiation of wind-deceleration by upward-propagating waves near the poleward edge of the region where wave 2 can propagate above the jet core. Thus, given the observed 100-hPa boundary forcing, stratospheric preconditioning is not needed to reproduce a major warming similar to that observed. The anomalously strong forcing in the lower stratosphere can be viewed as the primary direct cause of the major warming.

Physical mechanism of initial breakdown pulses and narrow bipolar events in lightning discharges

NASA Astrophysics Data System (ADS)

da Silva, Caitano L.; Pasko, Victor P.

2015-05-01

To date the true nature of initial breakdown pulses (IBPs) and narrow bipolar events (NBEs) in lightning discharges remains a mystery. Recent experimental evidence has correlated IBPs to the initial development of lightning leaders inside the thundercloud. NBE wideband waveforms resemble classic IBPs in both amplitude and duration. Most NBEs are quite peculiar in the sense that very frequently they occur in isolation from other lightning processes. The remaining fraction, 16% of positive polarity NBEs, according to Wu et al. (2014), happens as the first event in an otherwise regular intracloud lightning discharge. These authors point out that the initiator type of NBEs has no difference with other NBEs that did not start lightning, except for the fact that they occur deeper inside the thunderstorm (i.e., at lower altitudes). In this paper, we propose a new physical mechanism to explain the source of both IBPs and NBEs. We propose that IBPs and NBEs are the electromagnetic transients associated with the sudden (i.e., stepwise) elongation of the initial negative leader extremity in the thunderstorm electric field. To demonstrate our hypothesis a novel computational/numerical model of the bidirectional lightning leader tree is developed, consisting of a generalization of electrostatic and transmission line approximations found in the literature. Finally, we show how the IBP and NBE waveform characteristics directly reflect the properties of the bidirectional lightning leader (such as step length, for example) and amplitude of the thunderstorm electric field.

An Analyses of Federal Initiatives To Support Women's Upward Mobility in Educational Administration.

ERIC Educational Resources Information Center

Gupton, Sandra Lee; Del Rosario, Rose Marie

The most significant role played by the federal government in advancing the state of sex equity in educational administration, as well as in most other issues involving social change, has been through legislation. This paper describes a few of the more significant federally funded initiatives related to increasing sex equity (with particular…

An Extreme-ultraviolet Wave Generating Upward Secondary Waves in a Streamer-like Solar Structure

NASA Astrophysics Data System (ADS)

Zheng, Ruisheng; Chen, Yao; Feng, Shiwei; Wang, Bing; Song, Hongqiang

2018-05-01

Extreme-ultraviolet (EUV) waves, spectacular horizontally propagating disturbances in the low solar corona, always trigger horizontal secondary waves (SWs) when they encounter the ambient coronal structure. We present the first example of upward SWs in a streamer-like structure after the passing of an EUV wave. This event occurred on 2017 June 1. The EUV wave happened during a typical solar eruption including a filament eruption, a coronal mass ejection (CME), and a C6.6 flare. The EUV wave was associated with quasi-periodic fast propagating (QFP) wave trains and a type II radio burst that represented the existence of a coronal shock. The EUV wave had a fast initial velocity of ∼1000 km s‑1, comparable to high speeds of the shock and the QFP wave trains. Intriguingly, upward SWs rose slowly (∼80 km s‑1) in the streamer-like structure after the sweeping of the EUV wave. The upward SWs seemed to originate from limb brightenings that were caused by the EUV wave. All of the results show that the EUV wave is a fast-mode magnetohydrodynamic (MHD) shock wave, likely triggered by the flare impulses. We suggest that part of the EUV wave was probably trapped in the closed magnetic fields of the streamer-like structure, and upward SWs possibly resulted from the release of slow-mode trapped waves. It is believed that the interplay of the strong compression of the coronal shock and the configuration of the streamer-like structure is crucial for the formation of upward SWs.

Intercollegiate Athletics at the Community College

ERIC Educational Resources Information Center

Williams, Mitchell R.; Byrd, Laura; Pennington, Kevin

2008-01-01

Each year, many community college leaders find themselves, either methodically or haphazardly, making decisions about intercollegiate athletics. There have, however, been few empirical studies on how and why community colleges initiate, expand, or terminate athletic programs. Two studies investigating leaders' perceptions of intercollegiate…

Translation of vph mRNA in Streptomyces lividans and Escherichia coli after removal of the 5' untranslated leader.

PubMed

Wu, C J; Janssen, G R

1996-10-01

The Streptomyces vinaceus viomycin phosphotransferase (vph) mRNA contains an untranslated leader with a conventional Shine-Dalgarno homology. The vph leader was removed by ligation of the vph coding sequence to the transcriptional start site of a Streptomyces or an Escherichia coli promoter, such that transcription would initiate at the first position of the vph start codon. Analysis of mRNA demonstrated that transcription initiated primarily at the A of the vph AUG translational start codon in both Streptomyces lividans and E. coli; cells expressing the unleadered vph mRNA were resistant to viomycin indicating that the Shine-Dalgarno sequence, or other features contained within the leader, was not necessary for vph translation. Addition of four nucleotides (5'-AUGC-3') onto the 5' end of the unleadered vph mRNA resulted in translation initiation from the vph start codon and the AUG triplet contained within the added sequence. Translational fusions of vph sequence to a Tn5 neo reporter gene indicated that the first 16 codons of vph coding sequence were sufficient to specify the translational start site and reading frame for expression of neomycin resistance in both E. coli and S. lividans.

Characteristics of M-component in rocket-triggered lightning and a discussion on its mechanism

NASA Astrophysics Data System (ADS)

Jiang, Rubin; Qie, Xiushu; Yang, Jing; Wang, Caixia; Zhao, Yang

2013-09-01

The current and electric field pulses associated with M-component following dart leader-return stroke sequences in negative rocket-triggered lightning flashes were analyzed in detail by using the data from Shandong Artificially Triggering Lightning Experiment, conducted from 2005 to 2010. For 63 M-components with current waveforms superimposed on the relatively steady continuing current, the geometric mean values of the peak current, duration, and charge transfer were 276 A, 1.21 ms, and 101 mC, respectively. The behaviors of the channel base current versus close electric field changes and the observation facts by different authors were carefully examined for investigation on mechanism of the M-component. A modified model based on Rakov's "two-wave" theory is proposed and confirms that the evolution of M-component through the lightning channel involves a downward wave transferring negative charge from the upper to the lower channel and an upward wave draining the charge transported by the downward wave. The upward wave serves to deplete the negative charge by the downward wave at its interface and makes the charge density of the channel beneath the interface layer to be roughly zero. Such modified concept is recognized to be reasonable by the simulated results showing a good agreement between the calculated and the measured E-field waveforms.

'Many are called...': participation by minority leaders in an AIDS intervention in San Francisco.

PubMed

Morales, E S; Fullilove, M T

1992-01-01

Though the AIDS epidemic has posed a significant threat to minority people, especially African Americans and Latinos, minority community response to the epidemic has lagged significantly behind the organized efforts initiated by the European-American gay community. To test the efficacy of an educational intervention in increasing the involvement of minority leaders in AIDS-related efforts, we identified and recruited 166 African-American and Latino leaders to participate in a randomized controlled trial. This report describes the identification and recruitment of leaders to the study. Overall, participation was low. Rates of participation were not associated with race but were significantly associated with category of leadership--that is, whether the individual was a religious leader, an agency director, an elected official, or an informal leader, with religious leaders least likely and agency directors most likely to participate. We discuss the implications of these findings for improving epidemic response in minority communities.

Broadband VHF Interferometer Observations of an Energetic In-cloud Pulse (EIP)

NASA Astrophysics Data System (ADS)

Tilles, J.; Krehbiel, P. R.; Stanley, M. A.; Rison, W.; Lyu, F.; Cummer, S.; Liu, N.; Dwyer, J. R.; Brown, R. G.; Wilson, J. G.

2017-12-01

Energetic in-cloud pulses (EIPs) are a little-known in-cloud subprocess of lightning. While they may be best identified by their large peak current (>200 kA) [Lyu et al., Geophys. Res. Lett., 42, 2015], they differ from narrow bipolar events (NBEs) - another type of in-cloud, high peak-current process - in that the sferic of an EIP lasts an order of magnitude longer ( ˜100 us) than that of a typical NBE ( ˜10 us). To further differentiate them from NBEs, EIPs are generally embedded within other electrical activity, whereas NBEs are known to primarily occur in isolation or as a lightning-initiating event [Smith et al., J. Geophys. Res., 104, D4, 4189-4212, 1999; Rison et al., Nat. Commun., 7, 10721, 2016]. Moreover, EIPs may have an intrinsic connection with the production of terrestrial gamma ray flashes (TGFs) [Cummer et al., Geophys. Res. Lett., 41, 8586-8593, 2014].Here we present coincident broadband VHF interferometer (INTF) observations and electric and magnetic field waveforms of an EIP with an associated NLDN peak current of 247 kA. The EIP occurs nearly 4 ms into a normal-polarity intracloud flash as part of the upward extension of the negative-polarity lightning leader. For this reason, we suspect that EIPs are a more energetic version of initial breakdown pulses (IBPs), which accompany the development of negative stepped leaders [e.g. Marshall et al., J. Geophys. Res. Atmos., 119, 445-460, 2014]. In addition, we show similarities with NBE-producing fast breakdown [Rison et al., 2016; Tilles et al., AE12A-03, AGU Fall Meeting, 2016], in that the breakdown accompanying the EIP propagates over a similar vertical extent ( ˜0.5-1 km) and with similar propagation speed ( ˜3×107 m/s). The INTF was developed by New Mexico Tech and has been deployed at Kennedy Space Center since July 2016. It employed three 100-m baselines in 2016, has a bandwidth of 14-88 MHz and samples at 180 MS/s with 16-bit resolution. A synchronously digitized fast antenna (FA), with 100-μ s decay time constant, samples the electric field, and the whole INTF+FA system is automatically triggered on strong VHF radiation. Coincident VLF/ LF (1-300 kHz, sampled at 1 MS/s) observations are made with Duke University's magnetic sensor network.

Characteristics of Currents and Electric Fields Associated with the Initial Stage of Upward Lightning

NASA Astrophysics Data System (ADS)

Watanabe, N.; Nag, A.; Diendorfer, G.; Pichler, H.; Schulz, W.

2017-12-01

There is increasing interest in understanding processes associated with the initiation of upward lightning from tall structures. Characterization of such processes is essential for the development of appropriate models. We examine current and electric field waveforms for 15 negative upward flashes occurring in 2007-2009 initiated from the Gaisberg Tower located in Salzburg, Austria. Current was measured at the top of the tower using a 0.25 mΩ shunt. Electric field was measured simultaneously at close (170 m from the tower) and far (79 km from the tower in 2007 and 109 km in 2008-2009) distances. The initial stage (IS) of these flashes comprised of relatively slowly varying "background" current (having durations ranging from 132 to 692 ms), with faster, more impulsive current variations (pulses having durations ranging from 4.7 µs to 22.9 ms) overlaid on this background current. In five of the 15 (33%) flashes, this IS background current was negative while in the other ten (67%) flashes, the current was bipolar (changing between negative and positive values). 150 current pulses occurred during the IS of these 15 flashes, of which 28 (19%) were positive bipolar (positive initial polarity with a negative opposite polarity overshoot), 5 (3.3%) were positive unipolar (positive initial polarity with no opposite polarity overshoot), and 117 (78%) were negative unipolar. No negative bipolar pulses were found. The median peak current and risetime for the 28 bipolar pulses were 0.74 kA and 2.8 µs, respectively, and those for the 122 unipolar pulses were 0.87 kA and 70 µs, respectively. Generally speaking, majority of the pulses occurring at the beginning of the initial stage were lower-amplitude positive bipolar, while higher-amplitude unipolar pulses were more likely to occur at later times. These 150 IS current pulses produced 133 detectable electric field change signatures at the near station and 59 at the far station (all recorded at 79 km in 12 flashes occurring in 2007). We will examine in detail the characteristics of these electric field pulses in order to gain insights into the mechanisms of the underlying processes.

Notch1-Dll4 signaling and mechanical force regulate leader cell formation during collective cell migration

PubMed Central

Riahi, Reza; Sun, Jian; Wang, Shue; Long, Min; Zhang, Donna D.; Wong, Pak Kin

2015-01-01

At the onset of collective cell migration, a subset of cells within an initially homogenous population acquires a distinct “leader” phenotype with characteristic morphology and motility. However, the factors driving leader cell formation as well as the mechanisms regulating leader cell density during the migration process remain to be determined. Here, we use single cell gene expression analysis and computational modeling to show that leader cell identity is dynamically regulated by Dll4 signaling through both Notch1 and cellular stress in a migrating epithelium. Time-lapse microscopy reveals that Dll4 is induced in leader cells after the creation of the cell-free region and leader cells are regulated via Notch1-Dll4 lateral inhibition. Furthermore, mechanical stress inhibits Dll4 expression and leader cell formation in the monolayer. Collectively, our findings suggest that a reduction of mechanical force near the boundary promotes Notch1-Dll4 signaling to dynamically regulate the density of leader cells during collective cell migration. PMID:25766473

Subordinate Perception and Evaluation of Leaders Who Differ on a Personal Characteristic: Are Leaders Interchangeable.

DTIC Science & Technology

1982-01-01

the LBDQ (measures of initiating structure and consideration) and either subsequent performance or satisfaction . Instead, the literature on the...on follower satisfaction and performance . Journal oaf Buins Researc , 1975, .1, 33-42. Bartol, K.M. The sex structuring of organizations: A search for...pencil instruments based on previous work on leadership by Vroom were created. Each story described a leader, the subject’s immediate superior, in a

Return Stroke Current Reflections in Rocket-Triggered Lightning

NASA Astrophysics Data System (ADS)

Caicedo, J.; Uman, M. A.; Jordan, D.; Biagi, C. J.; Hare, B.

2015-12-01

In the six years from 2009 to 2014, there have been eight triggered flashes at the ICLRT, from a total of 125, in which a total of ten return stroke channel-base currents exhibited a dip 3.0 to 16.6 μs after the initial current peak. Close range electric field measurements show a related dip following the initial electric field peak, and electric field derivative measurements show an associated bipolar pulse, confirming that this phenomenon is not an instrumentation effect in the current measurement. For six of the eight flashes, high-speed video frames show what appears to be suspended sections of unexploded triggering wire at heights of about 150 to 300 m that are illuminated when the upward current wave reaches them. The suspended wire can act as an impedance discontinuity, perhaps as it explodes, and cause a downward reflection of some portion of the upward-propagating current wave. This reflected wave travels down the channel and causes the dip in the measured channel-base current when it reaches ground and reflects upward. The modified transmission line model with exponential decay (MTLE) is used to model the close electric field and electric field derivatives of the postulated initial and reflected current waves, starting with the measured channel base current, and the results are compared favorably with measurements made at distances ranging from 92 to 444 m. From the measured time between current impulse initiation and the time the current reflection reaches the channel base and the current dip initiates, along with the reflection height from the video records, we find the average return stroke current speed for each of the ten strokes to be from 0.28 to 1.9×108 ms-1, with an error of ±0.01×108 ms-1 due to a ±0.1 μs uncertainty in the measurement. This represents the first direct measurement of return stroke current speed, all previous return stroke speed measurements being derived from the luminosity of the process.

Instrumental record of debris flow initiation during natural rainfall: Implications for modeling slope stability

Treesearch

David R. Montgomery; Kevin M. Schmidt; William E. Dietrich; Jim McKean

2009-01-01

The middle of a hillslope hollow in the Oregon Coast Range failed and mobilized as a debris flow during heavy rainfall in November 1996. Automated pressure transducers recorded high spatial variability of pore water pressure within the area that mobilized as a debris flow, which initiated where local upward flow from bedrock developed into overlying colluvium....

Community Movement in Applying Mosquito Net on House Ventilations: An Initial Support for Green Architecture to Decrease Dengue Disease in Bandung Indonesia

NASA Astrophysics Data System (ADS)

Rinawan, F. R.; Dewi, I. P. P.; Haifa, G. Z.; Suharno, K. D.; Oktavinus, K.; Lyn, P. S.

2017-10-01

Green architecture still has risk to dengue disease when trees cover house roofs’ gutter. This study was aimed to continue a geographical information system (GIS) and remote sensing (RS) study on roofs factor association with dengue disease by initiating community movement in applyingmosquito net on house ventilations to cut the disease transmission and mosquito breeding sites inside house. Our methods was an operational research in which improvement of interventions, policies and regulations towards dengue disease prevention is our intended endpoint. Several steps were conducted such as: (1) research problems formulation from GIS-RS analysis from previous phase research in Bandung city, (2) informal and formal approach to community leaders and primary healthcare centre (Puskesmas), (3) Video education and focus group discussion (FGD), (4) initial application of mosquito nets on house in communities; and (5) advocacy to Mayor of Bandung city (was on progress).Our study resulted several supports: one of sub-city leaders (Camat) in the city, village leaders (Lurah), and sub-village leaders (Ketua RW) of 5 villages (kelurahan), one kelurahan which mainly comprised formal settlements needed more efforts, which was experts on dengue disease from university to directly explain the mosquito nets application to its community. Informal leaders in all kelurahan’s community suggested only mothers movement was not enough, thus, youths in community was mentioned to help the community movement on the mosquito nets application.

Plague

MedlinePlus

... Award Negotiation & Initial Award After Award Foreign Grants Management Getting Your Initial International Award Actions You Can Take as the Project Leader on a Foreign Grant Subawards for Foreign ...

75 FR 61415 - Admiralty National Monument: Tongass National Forest; Alaska; Expansion of Tailings Disposal...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-05

... Samuelson, Interdisciplinary Team Leader, Tongass National Forest Minerals Program Leader, 8510 Mendenhall...'' including wetlands, habitat, and the intrinsic characteristics that warranted the Monument's initial... Doc. 2010-24907 Filed 10-4-10; 8:45 am] BILLING CODE 3410-11-P ...

A Summer Leadership Development Program for Chemical Engineering Students

ERIC Educational Resources Information Center

Simpson, Annie E.; Evans, Greg J.; Reeve, Doug

2012-01-01

The Engineering Leaders of Tomorrow Program (LOT) is a comprehensive curricular, co-curricular, extra-curricular leadership development initiative for engineering students. LOT envisions: "an engineering education that is a life-long foundation for transformational leaders and outstanding citizens." Academic courses, co-curricular certificate…

Lessons for Leaders.

ERIC Educational Resources Information Center

Parker, Barbara

1994-01-01

Among the current crop of business leadership manuals, the six reviewed are applicable for school leaders as well. Themes of effective employee management and motivation, personal responsibility, and having the ability to initiate and implement constructive change are among the common threads running through the books. Information on ordering the…

Formation of raiding parties for intergroup violence is mediated by social network structure

PubMed Central

Glowacki, Luke; Isakov, Alexander; Wrangham, Richard W.; McDermott, Rose; Fowler, James H.; Christakis, Nicholas A.

2016-01-01

Intergroup violence is common among humans worldwide. To assess how within-group social dynamics contribute to risky, between-group conflict, we conducted a 3-y longitudinal study of the formation of raiding parties among the Nyangatom, a group of East African nomadic pastoralists currently engaged in small-scale warfare. We also mapped the social network structure of potential male raiders. Here, we show that the initiation of raids depends on the presence of specific leaders who tend to participate in many raids, to have more friends, and to occupy more central positions in the network. However, despite the different structural position of raid leaders, raid participants are recruited from the whole population, not just from the direct friends of leaders. An individual’s decision to participate in a raid is strongly associated with the individual’s social network position in relation to other participants. Moreover, nonleaders have a larger total impact on raid participation than leaders, despite leaders’ greater connectivity. Thus, we find that leaders matter more for raid initiation than participant mobilization. Social networks may play a role in supporting risky collective action, amplify the emergence of raiding parties, and hence facilitate intergroup violence in small-scale societies. PMID:27790996

Pneumococcal Pneumonia

MedlinePlus

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HIV / AIDS

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Food Allergy

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Ebola/Marburg

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E. Coli

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Lyme Disease

MedlinePlus

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Assessing organizational readiness for depression care quality improvement: relative commitment and implementation capability.

PubMed

Rubenstein, Lisa V; Danz, Marjorie S; Crain, A Lauren; Glasgow, Russell E; Whitebird, Robin R; Solberg, Leif I

2014-12-02

Depression is a major cause of morbidity and cost in primary care patient populations. Successful depression improvement models, however, are complex. Based on organizational readiness theory, a practice's commitment to change and its capability to carry out the change are both important predictors of initiating improvement. We empirically explored the links between relative commitment (i.e., the intention to move forward within the following year) and implementation capability. The DIAMOND initiative administered organizational surveys to medical and quality improvement leaders from each of 83 primary care practices in Minnesota. Surveys preceded initiation of activities directed at implementation of a collaborative care model for improving depression care. To assess implementation capability, we developed composites of survey items for five types of organizational factors postulated to be collaborative care barriers and facilitators. To assess relative commitment for each practice, we averaged leader ratings on an identical survey question assessing practice priorities. We used multivariable regression analyses to assess the extent to which implementation capability predicted relative commitment. We explored whether relative commitment or implementation capability measures were associated with earlier initiation of DIAMOND improvements. All five implementation capability measures independently predicted practice leaders' relative commitment to improving depression care in the following year. These included the following: quality improvement culture and attitudes (p = 0.003), depression culture and attitudes (p <0.001), prior depression quality improvement activities (p <0.001), advanced access and tracking capabilities (p = 0.03), and depression collaborative care features in place (p = 0.03). Higher relative commitment (p = 0.002) and prior depression quality improvement activities appeared to be associated with earlier participation in the DIAMOND initiative. The study supports the concept of organizational readiness to improve quality of care and the use of practice leader surveys to assess it. Practice leaders' relative commitment to depression care improvement may be a useful measure of the likelihood that a practice is ready to initiate evidence-based depression care changes. A comprehensive organizational assessment of implementation capability for depression care improvement may identify specific barriers or facilitators to readiness that require targeted attention from implementers.

Rewetting of Monogroove Heat Pipe in Space Station Radiators

NASA Technical Reports Server (NTRS)

Chan, S. H.; Shen, Ting Rong; Blake, John

1996-01-01

Experimental investigation of the rewetting characteristics of a uniformly heated grooved surface was performed, the results of which are presented in this work. It was found that, for a rewetting fluid of 2-propanol, the rewetting temperature was approx. 93-96 C for the upward-facing case and about 2 C lower for the downwardfacing case. When the initial plate temperature was higher than the rewetting temperature, the rewetting speed decreased with the initial plate temperature. The rewetting speed is also faster in the upward-facing case than in the downward-facing case for the same initial plate temperatures, which indicates a gravitational effect on rewetting. This trend is found to be consistent with the previously investigated end heating condition. The rewetting distance that is predicted by the conduction controlled model is found to be in fair agreement with the experimental data. Also, an apparatus that enables experiments to be performed in a reduced gravitational environment has been built and experiments are currently being performed. The design of this apparatus is presented along with preliminary data.

Dryout-type critical heat flux in vertical upward annular flow: effects of entrainment rate, initial entrained fraction and diameter

NASA Astrophysics Data System (ADS)

Wu, Zan; Wadekar, Vishwas; Wang, Chenglong; Sunden, Bengt

2018-01-01

This study aims to reveal the effects of liquid entrainment, initial entrained fraction and tube diameter on liquid film dryout in vertical upward annular flow for flow boiling. Entrainment and deposition rates of droplets were included in mass conservation equations to estimate the local liquid film mass flux in annular flow, and the critical vapor quality at dryout conditions. Different entrainment rate correlations were evaluated using flow boiling data of water and organic liquids including n-pentane, iso-octane and R134a. Effect of the initial entrained fraction (IEF) at the churn-to-annular flow transition was also investigated. A transitional Boiling number was proposed to separate the IEF-sensitive region at high Boiling numbers and the IEF-insensitive region at low Boiling numbers. Besides, the diameter effect on dryout vapor quality was studied. The dryout vapor quality increases with decreasing tube diameter. It needs to be pointed out that the dryout characteristics of submillimeter channels might be different because of different mechanisms of dryout, i.e., drying of liquid film underneath long vapor slugs and flow boiling instabilities.

The Land Combat Model (DYNCOM). Volume 2

DTIC Science & Technology

1970-01-01

maneuver units. While moving, each element guides on his maneuver unit leader who designates routes and formations. , If the maneuver unit is...occupying a stationary position, the decision to Initiate movement is made by the man- euver unit leader . ,K... •■«mriamnii-K mmäi —^-- i’fafc-Ja-M...vided a communication net known as the platoon tactical net. The platoon leaders and other elements, designated by input data, are on a net

Responsible Transition of New Materiel Requirements into Programs of Record

DTIC Science & Technology

2013-03-01

Pentagon as a senior leader in the Ford Motor Company. He desired to inculcate a business mentality in the DoD acquisition process. His initiatives in...the Army War College’s doctrinal definition of strategy, it becomes easier for strategic leaders to understand to the framework. JCIDS represents the...Other entities play into this system as shown in Figure 4. In the prevailing interest of compromise, leaders try to find a way to afford all

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The Global Spine Care Initiative: a consensus process to develop and validate a stratification scheme for surgical care of spinal disorders as a guide for improved resource utilization in low- and middle-income communities.

PubMed

Acaroğlu, Emre; Mmopelwa, Tiro; Yüksel, Selcen; Ayhan, Selim; Nordin, Margareta; Randhawa, Kristi; Haldeman, Scott

2017-10-16

The purpose of this study was to develop a stratification scheme for surgical spinal care to serve as a framework for referrals and distribution of patients with spinal disorders. We used a modified Delphi process. A literature search identified experts for the consensus panel and the panel was expanded by inviting spine surgeons known to be global opinion leaders. After creating a seed document of five hierarchical levels of surgical care, a four-step modified Delphi process (question validation, collection of factors, evaluation of factors, re-evaluation of factors) was performed. Of 78 invited experts, 19 participated in round 1, and of the 19, 14 participated in 2, and 12 in 3 and 4. Consensus was fairly heterogeneous for levels of care 2-4 (moderate resources). Only simple assessment methods based on the clinical skills of the medical personnel were considered feasible and safe in low-resource settings. Diagnosis, staging, and treatment were deemed feasible and safe in a specialized spine center. Accurate diagnostic workup was deemed feasible and safe for lower levels of care complexity (from level 3 upwards) compared to non-invasive procedures (level 4) and the full range of invasive procedures (level 5). This study introduces a five-level stratification scheme for the surgical care of spinal disorders. This stratification may provide input into the Global Spine Care Initiative care pathway that will be applied in medically underserved areas and low- and middle-income countries. These slides can be retrieved under Electronic Supplementary Material.

Respiratory Syncytial Virus

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Chronic Lyme Disease

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Dengue Fever Treatment

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HIV/AIDS Treatment

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Antimicrobial (Drug) Resistance

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West Nile Virus

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MERS and SARS

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Congenital Neutropenia Syndromes

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Addressing Gaps in Mental Health and Addictions Nursing Leadership: An Innovative Professional Development Initiative.

PubMed

Gehrs, Margaret; Strudwick, Gillian; Ling, Sara; Reisdorfer, Emilene; Cleverley, Kristin

2017-01-01

Mental health and addictions services are integral to Canada's healthcare system, and yet it is difficult to recruit experienced nurse leaders with advanced practice, management or clinical informatics expertise in this field. Master's-level graduates, aspiring to be mental health nurse leaders, often lack the confidence and experience required to lead quality improvement, advancements in clinical care, service design and technology innovations for improved patient care. This paper describes an initiative that develops nursing leaders through a unique scholarship, internship and mentorship model, which aims to foster confidence, critical thinking and leadership competency development in the mental health and addictions context. The "Mutual Benefits Model" framework was applied in the design and evaluation of the initiative. It outlines how mentee, mentor and organizational needs can drive strategic planning of resource investment, mentorship networks and relevant leadership competency-based learning plans to optimize outcomes. Five-year individual and organizational outcomes are described. © 2017 Longwoods Publishing.

Hydrodynamic implications of textural trends in sand deposits of the 2004 tsunami in Sri Lanka

USGS Publications Warehouse

Morton, R.A.; Goff, J.R.; Nichol, S.L.

2008-01-01

Field observations and sediment samples at a coastal-plain setting in southeastern Sri Lanka were used to document the erosional and depositional impacts of the 2004 Indian Ocean tsunami and to interpret the hydrodynamic processes that produced an extensive sand-sheet deposit. Tsunami deposit thicknesses ranged from 6 to 22??cm with thickness being controlled partly by antecedent topography. The deposit was composed of coarse to medium sand organized into plane-parallel laminae and a few laminasets. Vertical textural trends showed an overall but non-systematic upward fining and upward thinning of depositional units with an upward increase in heavy-mineral laminations at some locations. Repeated patterns in the vertical textural trends (upward fining, upward coarsening, uniform) were used to subdivide and correlate the deposit into five hydro-textural stratigraphic units. The depositional units were linked to hydrodynamic processes and upcurrent conditions, such as rates of sediment supply and composition of the sediment sources. Vertical changes in grain-size distributions recorded the depositional phases associated with flow acceleration, initial unsteady pulsating flow, relatively stable and uniform flow, flow deceleration, slack water, and return flow or flow redirection. Study results suggest that vertical textural trends from multiple cross-shore sections can be used to interpret complex tsunami flow histories, but at the location examined, interpretation of the lateral textural trends did not provide a basis for identifying the correct sediment transport pathways because flow near the landward boundary was multidirectional.

Leadership Development Initiative: Growing Global Leaders… Advancing Palliative Care.

PubMed

Ferris, Frank D; Moore, Shannon Y; Callaway, Mary V; Foley, Kathleen M

2018-02-01

The International Palliative Care Leadership Development Initiative (LDI) was a model demonstration project that aimed to expand the global network of palliative care leaders in low- and moderate-resource countries who are well positioned to apply their new leadership skills. Thirty-nine palliative medicine physicians from 25 countries successfully completed the two-year curriculum that included three thematic residential courses, mentorship, and site visits by senior global palliative care leaders and personal projects to apply their new leadership skills. The focus on self-reflection, leadership behaviors and practices, strategic planning, high-level communication, and teaching skills led to significant personal and professional transformation among the participants, mentors, and the LDI team. The resulting residential course curriculum and the personal leadership stories and biosketches of the leaders are now available open access at IPCRC.net. Already, within their first-year postgraduation, the leaders are using their new leadership skills to grow palliative care capacity through significant changes in policy, improved opioid/other medication availability, new and enhanced educational curricula and continuing education activities, and development/expansion of palliative care programs in their organizations and regions. We are not aware of another palliative care initiative that achieves the global reach and ripple effect that LDI has produced. Copyright © 2017 American Academy of Hospice and Palliative Medicine. Published by Elsevier Inc. All rights reserved.

Preliminary results from the Sprites94 aircraft campaign: 2. Blue jets

NASA Technical Reports Server (NTRS)

Wescott, E. M.; Sentman, D.; Osborne, D.; Hampton, D.; Heavner, M.

1995-01-01

Initial observations of a newly documented type of optical emission above thunderstorms are reported. 'Blue jets', or narrowly collimated beams of blue light that appear to propagate upwards from the tops of thunderstorms, were recorded on B/W and color video cameras for the first time during the Sprites94 aircraft campaign, June-July, 1994. The jets appear to propagate upward at speeds of about 100 km/s and reach terminal altitudes of 40-50 m. Fifty six examples were recorded during a 22 minute interval during a storm over Arkansas. We examine some possible mechanisms, but have no satisfactory theory of this phenomenon.

Chronic Granulomatous Disease (CGD)

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PI3 Kinase Disease

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Eczema (Atopic Dermatitis)Treatment

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X-Linked Agammaglobulinemia (XLA)

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Severe Combined Immunodeficiency (SCID)

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Group A Streptococcal Infections

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What Is a Vaccine?

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Antimicrobial (Drug) Resistance Prevention

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Glycosylation Disorders with Immunodeficiency

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Hyper-IgM Syndrome

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Common Variable Immunodeficiency (CVID)

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Sexually Transmitted Diseases (STDs)

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Outdoor Leadership Evaluation: Nature and Scope of the Problem.

ERIC Educational Resources Information Center

James, Leroy M.

Beyond the ability to exhibit good judgment and common sense while performing duties as a leader under stress and pressure, an outdoor adventure program leader should possess technical skills, human relations skills, and philosophical understanding of outdoor programming. Technical skills include knowledge of initiatives/ropes course activities,…

School Leadership Preparation and Development in Africa: A Critical Insight

ERIC Educational Resources Information Center

Eacott, Scott; Asuga, Gladys Nyanchama

2014-01-01

When it comes to organizational performance, leaders matter. Without significant attention to the preparation and development of school leaders, government initiatives aimed at building world class education systems are unlikely to succeed. Across the Anglophone world leadership preparation and development has become a key leverage point in…

David Ben-Gurion: A Creative Leader

ERIC Educational Resources Information Center

Rosemarin, Shoshana

2014-01-01

David Ben-Gurion (1886-1973), the first Prime Minister of Israel, is included in Pasternak's (2001) list of the nine most memorable leaders of the twentieth century. All of them are remembered for the reforms they initiated. Roosevelt (USA), Stalin (Russia), Castro (Cuba), and Thatcher (England) focused on social-economical changes, whereas Gandhi…

Measuring School Effectiveness in Memphis--Year 2. Final Report

ERIC Educational Resources Information Center

Potamites, Liz; Chaplin, Duncan; Isenberg, Eric; Booker, Kevin

2009-01-01

New Leaders for New Schools, a nonprofit organization committed to training school principals, heads the Effective Practices Incentive Community (EPIC), an initiative that offers financial awards to effective educators. New Leaders and its partner organizations have received from the U.S. Department of Education tens of millions of dollars in…

The EPIC Leadership Development Program Evaluation Report. Research Brief

ERIC Educational Resources Information Center

New Leaders for New Schools (NJ1), 2011

2011-01-01

New Leaders for New Schools created the Effective Practice Incentive Community (EPIC) initiative in 2006 to learn from educators driving achievement gains in high-need urban schools. EPIC identifies school leaders and teachers whose students are making significant achievement gains and financially rewards these educators in exchange for sharing…

Evaluation Report: The EPIC Leadership Development Model and Pilot Programs

ERIC Educational Resources Information Center

New Leaders (NJ1), 2011

2011-01-01

New Leaders created the Effective Practice Incentive Community (EPIC) initiative in 2006 to learn from educators driving achievement gains in high-need urban schools. EPIC identifies school leaders and teachers whose students are making significant achievement gains and financially rewards these educators in exchange for sharing and documenting…

Undergraduate Peer Mentors as Teacher Leaders: Successful Starts

ERIC Educational Resources Information Center

Wallin, Dawn; DeLathouwer, Erin; Adilman, Jordan; Hoffart, Jessie; Prior-Hildebrandt, Kathy

2017-01-01

This paper discusses the results of a qualitative study that examined the professional growth of undergraduate peer mentors as teacher leaders during an innovative Learning Community initiative designed for a teacher education program at the University of Saskatchewan. The paper describes the extent to which peer mentors exhibited characteristics…

Wild Children

ERIC Educational Resources Information Center

Trotman, Helen

2010-01-01

In this article, the author, a Forest School Leader with Shropshire Wildlife Trust, shows how nature is the best teacher. She describes a new approach to out-of-classroom learning during which qualified leaders use simple challenges and achievable tasks to encourage child-initiated learning in the great outdoors. At Forest School, children are…

I Am Mentor, I Am Coach

ERIC Educational Resources Information Center

Augustine-Shaw, Donna; Reilly, Marceta

2017-01-01

Preparing good leaders depends not only on providing good initial professional learning, but also on creating a strong support structure during the early years of practice. However, what good mentoring looks and sounds like varies widely in practice. Many mentoring programs for education leaders consist of buddy-like relationships that provide…

The Right Equation for Math Teaching

ERIC Educational Resources Information Center

Schifter, Deborah; Granofsky, Burt

2012-01-01

Full implementation of the Common Core State Standards for mathematics is still a few years away for many states. But district and school leaders are faced with many decisions now--from curriculum adoption to teacher professional development--that will influence the long-term effectiveness of this bold initiative. School leaders have a significant…

Motivations of Volunteer Leaders in an Extension Exercise Program

ERIC Educational Resources Information Center

Washburn, Lisa T.; Cornell, Carol E.; Traywick, LaVona; Felix, Holly C.; Phillips, Martha

2015-01-01

This article describes findings from a qualitative study of volunteer leaders in the StrongWomen strength training program in Arkansas. The study explored reasons volunteers initially agreed to serve, perceptions of volunteer role, and motivations for continuing to lead strength training groups long-term. Findings suggest a combination of factors…

Leadership Influence on Corporate Change Involving Distance Training

ERIC Educational Resources Information Center

Wasyluk, Olga; Berge, Zane L.

2007-01-01

Corporate learning leaders require a unique set of skills to sustain learning programs within their organizations. Leaders must have well-planned strategies and clear direction for learning initiatives. They must understand their organization as well as their learners, and be able to skillfully deploy appropriate learning technologies. A network…

Are You a Leader? How We Learned to Stop Asking

ERIC Educational Resources Information Center

Bacal, Jessica; Ly, Minh; Walters, Jennifer L.; Einbinder, Allyson

2015-01-01

Smith College initiated an ePortfolio pilot project to guide students in documenting key learning experiences and in linking those experiences to Smith's institutional mission of "developing leaders for society's challenges" (Smith College, 2011). Twenty-one college students volunteered to participate in the pilot, based on the…

Education Policy Borrowing: Professional Standards for School Leaders in China

ERIC Educational Resources Information Center

Wei, Wei

2017-01-01

Realizing there is a global policy convergence that emphasizes the standardized key qualities of and expectations for "successful" school leaders, this article provides an in-depth analysis on the initiation of the "Professional Standards for Compulsory Schools Principals" (Ministry of Education of the People's Republic of…

Going Camping? A Basic Guide to Camping with Students.

ERIC Educational Resources Information Center

1977

Beginning with the "often overlooked areas", this guide to camping trips for secondary students presents initial planning procedures such as: site selection; number of leaders per number of students (2 leaders for each group of 10-12); parental permission forms; transportation arrangements; public school announcements; medical aid expertise and…

Supporting School Leaders in Blended Learning with Blended Learning

ERIC Educational Resources Information Center

Acree, Lauren; Gibson, Theresa; Mangum, Nancy; Wolf, Mary Ann; Kellogg, Shaun; Branon, Suzanne

2017-01-01

This study provides a mixed-methods case-study design evaluation of the Leadership in Blended Learning (LBL) program. The LBL program uses blended approaches, including face-to-face and online, to prepare school leaders to implement blended learning initiatives in their schools. This evaluation found that the program designers effectively…

Plugging In

ERIC Educational Resources Information Center

Peterson, Erin

2010-01-01

No matter the medium--magazines, newspapers, or TV--institutional leaders need to hit the right tone and convey specific talking points to their audience. A media-savvy leader doesn't just provide accurate information; he or she can help change the tenor of a discussion and build support for crucial institutional initiatives. No university is an…

Relational Principles for Effective Church Leadership

ERIC Educational Resources Information Center

Watt, Willis M.

2014-01-01

In the 21st century, effective church leaders need to be prepared to emphasize and demonstrate ethical leadership, personal responsibility, and community service. The foundation for success in all those areas lies in the ability of church leaders to initiate, develop, and maintain positive functioning relationships. Based on over 40 year's…

Maximizing Team Performance: The Critical Role of the Nurse Leader.

PubMed

Manges, Kirstin; Scott-Cawiezell, Jill; Ward, Marcia M

2017-01-01

Facilitating team development is challenging, yet critical for ongoing improvement across healthcare settings. The purpose of this exemplary case study is to examine the role of nurse leaders in facilitating the development of a high-performing Change Team in implementing a patient safety initiative (TeamSTEPPs) using the Tuckman Model of Group Development as a guiding framework. The case study is the synthesis of 2.5 years of critical access hospital key informant interviews (n = 50). Critical juncture points related to team development and key nurse leader actions are analyzed, suggesting that nurse leaders are essential to maximize clinical teams' performance. © 2016 Wiley Periodicals, Inc.

Overview of the Immune System

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The start of lightning: Evidence of bidirectional lightning initiation.

PubMed

Montanyà, Joan; van der Velde, Oscar; Williams, Earle R

2015-10-16

Lightning flashes are known to initiate in regions of strong electric fields inside thunderstorms, between layers of positively and negatively charged precipitation particles. For that reason, lightning inception is typically hidden from sight of camera systems used in research. Other technology such as lightning mapping systems based on radio waves can typically detect only some aspects of the lightning initiation process and subsequent development of positive and negative leaders. We report here a serendipitous recording of bidirectional lightning initiation in virgin air under the cloud base at ~11,000 images per second, and the differences in characteristics of opposite polarity leader sections during the earliest stages of the discharge. This case reveals natural lightning initiation, propagation and a return stroke as in negative cloud-to-ground flashes, upon connection to another lightning channel - without any masking by cloud.

How networks split when rival leaders emerge

NASA Astrophysics Data System (ADS)

Krawczyk, Malgorzata J.; Kułakowski, Krzysztof

2018-02-01

In a model social network, two hubs are appointed as leaders. Consecutive cutting of links on a shortest path between them splits the network in two. Next, the network is growing again till the initial size. Both processes are cyclically repeated. We investigate the size of a cluster containing the largest hub, the degree, the clustering coefficient, the closeness centrality and the betweenness centrality of the largest hub, as dependent on the number of cycles. The results are interpreted in terms of the leader's benefits from conflicts.

Success factors for strategic change initiatives: a qualitative study of healthcare administrators' perspectives.

PubMed

Kash, Bita Arbab; Spaulding, Aaron; Johnson, Christopher E; Gamm, Larry

2014-01-01

Success factors related to the implementation of change initiatives are well documented and discussed in the management literature, but they are seldom studied in healthcare organizations engaged in multiple strategic change initiatives. The purpose of this study was to identify key success factors related to implementation of change initiatives based on rich qualitative data gathered from health leader interviews at two large health systems implementing multiple change initiatives. In-depth personal interviews with 61 healthcare leaders in the two large systems were conducted and inductive qualitative analysis was employed to identify success factors associated with 13 change initiatives. Results from this analysis were compared to success factors identified in the literature, and generalizations were drawn that add significantly to the management literature, especially to that in the healthcare sector. Ten specific success factors were identified for the implementation of change initiatives. The top three success factors were (1) culture and values, (2) business processes, and (3) people and engagement. Two of the identified success factors are unique to the healthcare sector and not found in the literature on change models: service quality and client satisfaction (ranked fourth of 10) and access to information (ranked ninth). Results demonstrate the importance of human resource functions, alignment of culture and values with change, and business processes that facilitate effective communication and access to information to achieve many change initiatives. The responses also suggest opportunities for leaders of healthcare organizations to more formally recognize the degree to which various change initiatives are dependent on one another.

Gender-Specific Health Challenges Facing Women

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Methicillin-Resistant Staphylococcus aureus (MRSA) Treatment

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Methicillin-Resistant Staphylococcus aureus (MRSA) Diagnosis

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Primary Immune Deficiency Disease Genetics & Inheritance

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Television Image of a Large Upward Electrical Discharge Above a Thunderstorm System

NASA Astrophysics Data System (ADS)

Franz, R. C.; Nemzek, R. J.; Winckler, J. R.

1990-07-01

An image of an unusual luminous electrical discharge over a thunderstorm 250 kilometers from the observing site has been obtained with a low-light-level television camera. The discharge began at the cloud tops at 14 kilometers and extended into the clear air 20 kilometers higher. The image, which had a duration of less than 30 milliseconds, resembled two jets or fountains and was probably caused by two localized electric charge concentrations at the cloud tops. Large upward discharges may create a hazard for aircraft and rocket launches and, by penetrating into the ionosphere, may initiate whistler waves and other effects on a magnetospheric scale. Such upward electrical discharges may account for unexplained photometric observations of distant lightning events that showed a low rise rate of the luminous pulse and no electromagnetic sferic pulse of the type that accompanies cloud-to-earth lightning strokes. An unusually high rate of such photometric events was recorded during the night of 22 to 23 September 1989 during a storm associated with hurricane Hugo.

Television image of a large upward electrical discharge above a thunderstorm system.

PubMed

Franz, R C; Nemzek, R J; Winckler, J R

1990-07-06

An image of an unusual luminous electrical discharge over a thunderstorm 250 kilometers from the observing site has been obtained with a low-light-level television camera. The discharge began at the cloud tops at 14 kilometers and extended into the clear air 20 kilometers higher. The image, which had a duration of less than 30 milliseconds,resembled two jets or fountains and was probably caused by two localizd electric charge concentrations at the cloud tops. Large upward discharges may create a hazard for aircraft and rocket launches and, by penetrating into the ionosphere, may initiate whistler waves and other effects on a magnetospheric scale. Such upward electrical discharges may account for unexplained photometric observations of distant lightning events that showed a low rise rate of the luminous pulse and no electromagnetic sferic pulse of the type that accompanies cloud-to-earth lightning strokes. An unusually high rate of such photometric events was recorded during the night of 22 to 23 September 1989 during a storm associated with hurricane Hugo.

Upward electrical discharges observed above Tropical Depression Dorian

PubMed Central

Liu, Ningyu; Spiva, Nicholas; Dwyer, Joseph R.; Rassoul, Hamid K.; Free, Dwayne; Cummer, Steven A.

2015-01-01

Observation of upward electrical discharges from thunderstorms has been sporadically reported in the scientific literature. According to their terminal altitudes, they are classified as starters (20–30 km), jets (40–50 km) and gigantic jets (70–90 km). They not only have a significant impact on the occupied atmospheric volumes but also electrically couple different atmospheric regions. However, as they are rare and unpredictable, our knowledge of them has been built on observations that typically record only one type of such discharges. Here we report a close-distance observation of seven upward discharges including one starter, two jets and four gigantic jets above Tropical Depression Dorian. Our optical and electromagnetic data indicate that all events are of negative polarity, suggesting they are initiated in the same thundercloud charge region. The data also indicate that the lightning-like discharge channel can extend above thunderclouds by about 30 km, but the discharge does not emit low-frequency electromagnetic radiation as normal lightning. PMID:25607345

Leading Integrated Health and Social Care Systems: Perspectives from Research and Practice.

PubMed

Evans, Jenna M; Daub, Stacey; Goldhar, Jodeme; Wojtak, Anne; Purbhoo, Dipti

2016-01-01

As the research evidence on integrated care has evolved over the past two decades, so too has the critical role leaders have for the implementation, effectiveness and sustainability of integrated care. This paper explores what it means to be an effective leader of integrated care initiatives by drawing from the experiences of a leadership team in implementing an award-winning integrated care program in Toronto, Canada. Lessons learned are described and assessed against existing theory and research to identify which skills and behaviours facilitate effective leadership of integrated care initiatives.

Leadership = Communication? The Relations of Leaders' Communication Styles with Leadership Styles, Knowledge Sharing and Leadership Outcomes.

PubMed

de Vries, Reinout E; Bakker-Pieper, Angelique; Oostenveld, Wyneke

2010-09-01

PURPOSE: The purpose of this study was to investigate the relations between leaders' communication styles and charismatic leadership, human-oriented leadership (leader's consideration), task-oriented leadership (leader's initiating structure), and leadership outcomes. METHODOLOGY: A survey was conducted among 279 employees of a governmental organization. The following six main communication styles were operationalized: verbal aggressiveness, expressiveness, preciseness, assuredness, supportiveness, and argumentativeness. Regression analyses were employed to test three main hypotheses. FINDINGS: In line with expectations, the study showed that charismatic and human-oriented leadership are mainly communicative, while task-oriented leadership is significantly less communicative. The communication styles were strongly and differentially related to knowledge sharing behaviors, perceived leader performance, satisfaction with the leader, and subordinate's team commitment. Multiple regression analyses showed that the leadership styles mediated the relations between the communication styles and leadership outcomes. However, leader's preciseness explained variance in perceived leader performance and satisfaction with the leader above and beyond the leadership style variables. IMPLICATIONS: This study offers potentially invaluable input for leadership training programs by showing the importance of leader's supportiveness, assuredness, and preciseness when communicating with subordinates. ORIGINALITY/VALUE: Although one of the core elements of leadership is interpersonal communication, this study is one of the first to use a comprehensive communication styles instrument in the study of leadership.

Preliminary Results From a Laboratory Study of Positive Streamer Discharges on Simulated Ice Hydrometeors

NASA Astrophysics Data System (ADS)

Petersen, D.; Bailey, M.; Hallett, J.; Beasley, W.

2007-12-01

The initiation of lightning remains an open question, due in large part to a deficit of in-situ observational evidence. Recent theoretical descriptions of lightning initiation have focused on runaway breakdown and related secondary processes, but have not convincingly explained the details of onset of the embryonic lightning leader channel. Among possible mechanisms contributing to the initial leader formation are positive streamer discharges from ice hydrometeors, themselves once favored as the primary explanation of lightning initiation. We present preliminary results from a new laboratory study of positive streamer discharges on simulated ice hydrometeors. Emphasis is given to precisely defining the minimum electric field strength required for onset of positive streamer generation, with variables of interest being ice crystal size, habit and environmental temperature.

Minority Energy Technical Assistance Program (METAP): Phase 1. Final technical report

DOE Office of Scientific and Technical Information (OSTI.GOV)

Merrill, K.

1997-04-06

The Phase 1 Triple E (Energy, Economic development, Environment) METAP series has been a success. Its broad acceptance and considerations of exceptional quality and substance by the man seminar participants who attended in the seven cities, have made the businesses of community empowerment, education, and awareness as they relate to energy, obviously important. Many community leaders and legislators have expressed their immense gratitude to the US Department of Energy, for initiating such an important agenda within their communities. There have been over 110 legislators and almost 1,200 participants collectively, who have participated in this very valuable initiative. The participants rangemore » from community leaders and legislators to members from the private and public sectors, universities, not for profits, civic and church leaders. Highlights and accomplishments of these seminars are summarized.« less

Leadership in nursing-current perspectives.

PubMed

Manocha, Sneh Lata

2008-02-01

A leader who serves with vision, (plans for future needs and problem solving) has courage, (takes initiative and leads followers to positive results) and is reality oriented (realizes that the fundamental changes are necessary in our attitude towards risk taking, assertiveness and difference in opinion) is a great leader who has potential for extraordinary results.

Aggregating School Based Findings to Support Decision Making: Implications for Educational Leadership

ERIC Educational Resources Information Center

Kaniuka, Theodore S.; Vitale, Michael R.; Romance, Nancy R.

2013-01-01

Successful school reform is dependent on the quality of decisions made by educational leaders. In such decision making, educational leaders are charged with using sound research findings as the basis for choosing school reform initiatives. As part of the debate regarding the usability of various evaluative research designs in providing information…

The Big Five of School Leadership Competences in the Netherlands

ERIC Educational Resources Information Center

Kruger, Meta

2009-01-01

School leaders have been given an important role in initiating and implementing school improvement, which demands new forms of leadership. This invokes the question of the basic competences for leadership that are presently required. This article focuses on the formulation of competences for school leaders in the Netherlands with the aim of…

Building a Quality Workforce. A Joint Initiative.

ERIC Educational Resources Information Center

Department of Commerce, Washington, DC.

For this joint effort among three Cabinet Agencies, studies by a variety of organizations were reviewed and 134 business leaders and 34 education leaders in many communities throughout the United States were interviewed to determine what businesses find lacking among new entrants into the labor force and what employers' work force needs will be in…

Strengthening Relationships with Families in the School Community: Do School Leaders Make a Difference?

ERIC Educational Resources Information Center

Quezada, Maria S.

2016-01-01

Many family engagement programs logically focus on providing training and support for parent leaders, giving them the skills and knowledge necessary to effectively partner with schools. Even with comprehensive parent leadership training, sustainable family engagement initiatives cannot truly take hold without buy-in, shared understanding, and a…

Exploring the Ambiguity: What Faculty Leaders Really Think of Sustainability in Higher Education

ERIC Educational Resources Information Center

Wright, Tarah; Horst, Naomi

2013-01-01

Purpose: The purpose of this paper is to examine how a cohort of university faculty leaders in Canadian universities conceptualize sustainable development, sustainable universities, the role universities play in achieving a sustainable future, key issues facing the university, and the barriers to implementing sustainability initiatives on campus.…

The Managerial Activities and Leadership Roles of Five Achieving the Dream Leader College Presidents

ERIC Educational Resources Information Center

Mace, Teresa Marie Taylor

2013-01-01

A significant increase in community colleges' (CC) presidential retirements is resulting in a huge loss of critical knowledge and experience. Recognition of this has led to numerous efforts and initiatives to prepare future community college leaders. These efforts have included numerous attempts to identify the competencies, skills, and leadership…

Digital Citizenship District-Wide: Examining the Organizational Evolution of an Initiative

ERIC Educational Resources Information Center

Monterosa, Vanessa M.

2017-01-01

District leaders play a pivotal role in shaping federally-mandated policies that impact how digital citizenship curriculum is developed and implemented in schools. Yet, for many school leaders, teaching about digital participation may appear as a daunting and unfamiliar practice. In fact, most educators do not participate in digital communities,…

The Sustainable University: Green Goals and New Challenges for Higher Education Leaders

ERIC Educational Resources Information Center

Martin, James; Samels, James E.

2012-01-01

Colleges and universities are at the forefront of efforts to preserve the earth's resources for future generations. Carbon neutrality, renewable energy sources, green building strategies, and related initiatives require informed and courageous leaders at all levels of higher education. James Martin and James E. Samels have worked closely with…

Achieve Together Bournemouth Partnership: Evaluation Report and Executive Summary

ERIC Educational Resources Information Center

Callanan, Meg; Farias, Javiera Cartagena; Hudson, Ruth; Greaves, Ellen

2017-01-01

The Achieve Together Bournemouth Partnership ("the Partnership") was a pilot collaboration between Teach First, Teaching Leaders, and The Future Leaders Trust. It was a new initiative that aimed to work with primary and secondary schools and the wider community in two socially deprived areas of Bournemouth (Boscombe and West Howe) to…

Performance Evaluation of the Educational Leader (PEEL): Another Breakthrough in Competency Based Educational Administration.

ERIC Educational Resources Information Center

Metzger, Christa; Lynch, Steven B.

1974-01-01

This paper describes the Performance Evaluation of the Education Leader (PEEL) program, initiated from a study to define the competent school administrator and to develop an instrument to measure administrative competence objectively and accurately. The resulting PEEL materials include the following: (a) "Guidelines for Evaluation: The School…

"Allies," Alliance for Learning: Investing in the Education of Students

ERIC Educational Resources Information Center

Hoaglund, Amy E.; Birkenfeld, Karen J.; Stone, Amanda; Rogers, Betsy

2016-01-01

Samford University's Initial Teacher Education program subscribes to the philosophy of developing teacher leaders to become a part of a K-12 faculty rather than a peripheral support system. The goal of the program is to acknowledge and develop desirable teacher leader abilities. Expertise, professionalism, enthusiasm, passion, and commitment are…

Solomon Islands School Leaders Readiness for Inclusive Education

ERIC Educational Resources Information Center

Porakari, James; Sevala, Brenda; Miniti, Patrick; Saemane, George; Sharma, Umesh; Forlin, Chris

2015-01-01

The inclusion of students with disabilities was initiated by the Ministry of Education and Human Resource Development in the Solomon Islands in 2013. This paper investigates the knowledge, skills, and values of school leaders in public and private schools in Honiara, the capital of the Solomon Islands, in regard to providing support for inclusive…

National Trends in Sustainability Performance: Lessons for Facilities Leaders

ERIC Educational Resources Information Center

Jones, Kristy M.; Keniry, L. Julian

2009-01-01

For most facilities leaders, sustainability is nothing new. The authors have observed repeatedly over several decades that administrative and facilities staff have often taken the lead in initiating many of the most effective and visible efforts on campuses to dramatically curb energy use and waste and to contain costs, even during times of rapid…

A New Era of Leadership: Preparing Leaders for Urban Schools & the 21st Century

ERIC Educational Resources Information Center

Abbott, Sunday C.

2010-01-01

The purpose of this study was to investigate the impact of principal participation in the Davis Principal Coaching Initiative, an executive leadership capacity building development program, on leader practice and professional practice of teachers. This mixed-method comparative case study investigated the following five research questions: (1) How…

Financing and Sustaining Out-of-School Time Programs in Rural Communities

ERIC Educational Resources Information Center

Sandel, Kate; Bhat, Soumya

2008-01-01

Leaders of programs serving rural America need to act strategically to ensure the long-term success of their initiatives. This strategy brief describes the funding landscape of rural programs and highlights the unique challenges confronting rural program leaders. It describes the different public and private resources that can support…

Transformational and Passive Leadership: An Initial Investigation of University Instructors as Leaders in a Virtual Learning Environment

ERIC Educational Resources Information Center

Bogler, Ronit; Caspi, Avner; Roccas, Sonia

2013-01-01

The study investigated whether students perceive their university instructors in a virtual learning environment as leaders. Referring to the full range leadership theory (FRLT), we examined the effects of transformational and passive leadership styles of university instructors on students' satisfaction and learning outcomes. Completed web-based…

Leadership Practices of Clinical Trials Office Leaders in Academic Health Centers

ERIC Educational Resources Information Center

Naser, Diana D.

2012-01-01

In the ever-changing clinical research environment, academic health centers seek leaders who are visionary and innovative. Clinical trials offices across the country are led by individuals who are charged with promoting growth and change in order to maximize performance, develop unique research initiatives, and help institutions achieve a…

Emerging Team Leader Dynamics in Contingent Situations: A Doctoral-Level Simulation

ERIC Educational Resources Information Center

Rojas, Ronald

2017-01-01

The literature on how a team leader emerges during the initial stages of a team formation presents a divergent landscape of possibilities. Most of the approaches focus on attributes, personality types, the influence of social tendencies, or relational capabilities. Yet these different theories and models suggest that many questions remain on this…

PLCG2-associatiated antibody deficiency immune dysregulation (PLAID)

MedlinePlus

... Award Negotiation & Initial Award After Award Foreign Grants Management Getting Your Initial International Award Actions You Can Take as the Project Leader on a Foreign Grant Subawards for Foreign ...

MHD Modelling of Coronal Loops: Injection of High-Speed Chromospheric Flows

NASA Technical Reports Server (NTRS)

Petralia, A.; Reale, F.; Orlando, S.; Klimchuk, J. A.

2014-01-01

Context. Observations reveal a correspondence between chromospheric type II spicules and bright upward-moving fronts in the corona observed in the extreme-ultraviolet (EUV) band. However, theoretical considerations suggest that these flows are probably not the main source of heating in coronal magnetic loops. Aims. We investigate the propagation of high-speed chromospheric flows into coronal magnetic flux tubes and the possible production of emission in the EUV band. Methods. We simulated the propagation of a dense 104 K chromospheric jet upward along a coronal loop by means of a 2D cylindrical MHD model that includes gravity, radiative losses, thermal conduction, and magnetic induction. The jet propagates in a complete atmosphere including the chromosphere and a tenuous cool (approximately 0.8 MK) corona, linked through a steep transition region. In our reference model, the jet initial speed is 70 km per second, its initial density is 10(exp 11) per cubic centimeter, and the ambient uniform magnetic field is 10 G. We also explored other values of jet speed and density in 1D and different magnetic field values in 2D, as well as the jet propagation in a hotter (approximately 1.5 MK) background loop. Results. While the initial speed of the jet does not allow it to reach the loop apex, a hot shock-front develops ahead of it and travels to the other extreme of the loop. The shock front compresses the coronal plasma and heats it to about 10(exp 6) K. As a result, a bright moving front becomes visible in the 171 Angstrom channel of the SDO/AIA mission. This result generally applies to all the other explored cases, except for the propagation in the hotter loop. Conclusions. For a cool, low-density initial coronal loop, the post-shock plasma ahead of upward chromospheric flows might explain at least part of the observed correspondence between type II spicules and EUV emission excess.

Aging and death-associated changes in serum albumin variability over the course of chronic hemodialysis treatment.

PubMed

Nakazato, Yuichi; Kurane, Riichi; Hirose, Satoru; Watanabe, Akihisa; Shimoyama, Hiromi

2017-01-01

Several epidemiological studies have demonstrated associations between variability in a number of biological parameters and adverse outcomes. As the variability may reflect impaired homeostatic regulation, we assessed albumin variability over time in chronic hemodialysis (HD) patients. Data from 1346 subjects who received chronic HD treatment from May 2001 to February 2015 were analyzed according to three phases of HD treatment: post-HD initiation, during maintenance HD treatment, and before death. The serum albumin values were grouped according to the time interval from HD initiation or death, and the yearly trends for both the albumin levels and the intra-individual albumin variability (quantified by the residual coefficient of variation: Alb-rCV) were examined. The HD initiation and death-associated changes were also analyzed using generalized additive mixed models. Furthermore, the long-term trend throughout the maintenance treatment period was evaluated separately using linear regression models. Albumin levels and variability showed distinctive changes during each of the 3 periods. After HD initiation, albumin variability decreased and reached a nadir within a year. During the subsequent maintenance treatment period (interquartile range = 5.2-11.0 years), the log Alb-rCV showed a significant upward trend (mean slope: 0.011 ± 0.035 /year), and its overall mean was -1.49 ± 0.08 (equivalent to an Alb-rCV of 3.22%). During the 1-2 years before death, this upward trend clearly accelerated, and the mean log Alb-rCV in the last year of life was -1.36 ± 0.17. The albumin levels and variability were negatively correlated with each other and exhibited exactly opposite movements throughout the course of chronic HD treatment. Different from the albumin levels, albumin variability was not dependent on chronological age but was independently associated with an individual's aging and death process. The observed upward trend in albumin variability seems to be consistent with a presumed aging-related decline in homeostatic capacity.

Talking to Your Doctor about Primary Immune Deficiency Diseases

MedlinePlus

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Northern Hemisphere climate trends in reanalysis and forecast model predictions: The 500 hPa annual means

NASA Astrophysics Data System (ADS)

Bordi, I.; Fraedrich, K.; Sutera, A.

2010-06-01

The lead time dependent climates of the ECMWF weather prediction model, initialized with ERA-40 reanalysis, are analysed using 44 years of day-1 to day-10 forecasts of the northern hemispheric 500-hPa geopotential height fields. The study addresses the question whether short-term tendencies have an impact on long-term trends. Comparing climate trends of ERA-40 with those of the forecasts, it seems that the forecast model rapidly loses the memory of initial conditions creating its own climate. All forecast trends show a high degree of consistency. Comparison results suggest that: (i) Only centers characterized by an upward trend are statistical significant when increasing the lead time. (ii) In midilatitudes an upward trend larger than the one observed in the reanalysis characterizes the forecasts, while in the tropics there is a good agreement. (iii) The downward trend in reanalysis at high latitudes characterizes also the day-1 forecast which, however, increasing lead time approaches zero.

Shape of Key Malaria Protein Could Help Improve Vaccine Efficacy

MedlinePlus

... Award Negotiation & Initial Award After Award Foreign Grants Management Getting Your Initial International Award Actions You Can Take as the Project Leader on a Foreign Grant Subawards for Foreign ...

Quality work in long-term care: the role of first-line leaders.

PubMed

Kjøs, Bente Ødegård; Botten, Grete; Gjevjon, Edith Roth; Romøren, Tor Inge

2010-10-01

To explore the first-line leaders' role in quality work in long-term care in Norway, in order to determine how that work is related to such success characteristics as leadership, staff, patients, performance, information and information technology. Cross-sectional telephone survey. The text was analysed using content analysis. Thirty-two Norwegian municipalities stratified according to region and population size. Sixty-four first-line leaders in nursing homes and home-based care. Main outcome measure The clinical microsystem approach is used as a framework by defining and designing measureable variables. Thirty-six leaders described how they initiated and motivated employees to be active in quality work; the remaining leaders indicated that they played a passive role. The first-line leaders played a key role in implementing national quality policies and regulations. The quantity of other success characteristics was low. The municipalities delegated the responsibility of implanting national policies to the first-line leaders. Missing were key quality success criteria such as macro- and meso-perspectives for the municipality as a whole and co-operation with other leaders in the organization and fostering of relevant learning. Quality work was fragmented rather than comprehensive and systematic.

Achieving Equitable Access to Strong Teachers: A Guide for District Leaders

ERIC Educational Resources Information Center

Bromberg, Marni

2016-01-01

The purpose of this guide is to help district leaders take on the challenge of ensuring that students have equitable access to excellent teachers. It shares some early lessons the Education Trust has learned from districts about the levers available to prioritize low-income students and students of color in teacher quality initiatives. The guide…

3 CFR 13555 - Executive Order 13555 of October 19, 2010. White House Initiative on Educational Excellence for...

Code of Federal Regulations, 2011 CFR

2011-01-01

... teachers and school leaders responsible for the education of Hispanic students; (v) reducing the dropout... higher education serving large numbers of Hispanic students; and (vii) enhancing the educational and life... United States of America, to restore the country to its role as the global leader in education, to...

Developing Science and Mathematics Teacher Leaders through a Math, Science & Technology Initiative

ERIC Educational Resources Information Center

Green, André M.; Kent, Andrea M.

2016-01-01

This study explores the effects of a professional development teacher leadership training program on the pedagogical and content development of math and science teacher leaders at the elementary level. The study is qualitative in nature, and the authors collected data using the online survey instrument Survey Monkey. The major implications of the…

The Trust Gap: Understanding the Effects of Leadership Churn in School Districts

ERIC Educational Resources Information Center

Finnigan, Kara S.; Daly, Alan J.

2017-01-01

In this article, Kara Finnigan and Alan Daly argue that studying churn among central office leaders and school principals can improve retention of high-quality leaders who can better support teachers. Constant churn often means that initiatives barely have the opportunity to get off the ground before a new central office administrator or principal…

Frederick National Laboratory Advisory Committee Welcomes New FNL, NCI Leaders | Poster

Cancer.gov

The Frederick National Laboratory Advisory Committee recently met to discuss the future of several high-profile Frederick National Lab initiatives in a meeting that included a chance to meet the new NCI and FNLCR leaders. Here is a look at a few of the highlights from the last of the 2017 FNLAC meetings.

School Leadership Mentoring Characteristics in an Era of Significant Educational Reform

ERIC Educational Resources Information Center

Monahan, Bobbie Jo

2012-01-01

The state of Indiana is undergoing substantial educational reform, as is the nation. Educational leaders are in great need of support as they address reform initiatives. The support that educational leaders receive from mentors/coaches may be a determining factor in how they embrace the latest reform and work with their school communities. The…

Leaders of Sustainable Development Projects: Resources Used and Lessons Learned in a Context of Environmental Education?

ERIC Educational Resources Information Center

Pruneau, Diane; Lang, Mathieu; Kerry, Jackie; Fortin, Guillaume; Langis, Joanne; Liboiron, Linda

2014-01-01

In our day, leaders involved in ingenious sustainable development projects plan spaces and implement practices that are beneficial to the environment. These initiatives represent a fertile source of information on the competences linked to environmental design that we should nurture in our students. In view of improving our understanding of the…

"Walking the Talk": The Influence of an Introduction to Cognitive Education on School Leaders

ERIC Educational Resources Information Center

Collett, Karen; Green, Lena

2017-01-01

The current emphasis on curriculum leadership implies the need to update school leaders' pedagogical knowledge. This paper will interest local and international readers because it highlights both essential content and the importance of the pedagogy employed to convey it. The study explored the initial effects of an introduction to Cognitive…

Collaborative Leadership Practices among Ohio's Early College High School Principals and Their Post-Secondary Partners

ERIC Educational Resources Information Center

Carter, Allia L.

2012-01-01

This constructivist multiple-case study examined the collaborative leadership practices of seven secondary and seven post-secondary leaders who participate in Ohio's Early College High School Initiative (ECHSI). The 14 educational leaders in this study partnered in an effort to respond to the access and success of traditionally underrepresented…

Leading and Supporting the Implementation of the Norwegian Network of Health Promoting Schools

ERIC Educational Resources Information Center

Viig, Nina Grieg; Fosse, Elisabeth; Samdal, Oddrun; Wold, Bente

2012-01-01

The aim of this study was to examine how program leaders in the Norwegian Network of Health Promoting Schools managed, facilitated, and supported the development and implementation of the health promotion initiatives at their school. Two focus group interviews were conducted with 10 program leaders. The findings suggest that the implementation of…

Information Needs Perceived as Important by Leaders in Advanced Technological Education: Alignment with Community College Program Improvement Initiatives

ERIC Educational Resources Information Center

Badway, Norena Norton; Somerville, Jerry

2011-01-01

The purpose of this study was to analyze what leaders of Advanced Technological Education (ATE) programs funded by the National Science Foundation believe are their most important needs for research information. Data was collected through a Delphi process, and results were analyzed through frameworks associated with program improvement initiatives…

The Relationship of Cultural Intelligence, Transformational Leadership Style, and Team Performance in Culturally Diverse Student Leaders in Christian Higher Education

ERIC Educational Resources Information Center

Menna, Tamene Yoseph

2017-01-01

The purpose of this study was to examine the relationship between cultural intelligence, transformational leadership, and team performance in one private Christian higher education institution in Southern California. The study further conducted initial exploration of how student leaders' Christian worldview (humility) influences their cultural…

Leading the Process of Reculturing: Roles and Actions of School Leaders

ERIC Educational Resources Information Center

Geijsel, Femke; Meijers, Frans; Wardekker, Wim

2007-01-01

In this article, we focus on the role and actions of individual school leaders in initiating and governing the process of reculturing. First, we elaborate on the core elements of the process of reculturing, referring to a complex learning process of finding a new balance between cognitions and emotions both individually and collectively. We then…

Leading in the 21st Century: Conceptualization of the Transformation of Higher Education and the Leadership Roles That Initiate These Changes

ERIC Educational Resources Information Center

Westover, Racheal R.

2016-01-01

This qualitative case study was proposed to gain understanding into how higher educational leaders perceive the transformation of their leadership roles and responsibilities. Leaders' accountabilities should be properly defined to establish a reliable and responsible association with all stakeholders affiliated with the institution. A lack of…

Educating Future Leaders of the Sport-Based Youth Development Field

ERIC Educational Resources Information Center

Whitley, Meredith A.; McGarry, Jennifer Bruening; Martinek, Thomas; Mercier, Kevin; Quinlan, Melissa

2017-01-01

In recent years, a substantial surge has occurred in the number of initiatives, events and organizations focused on using sport as a tool for development, peacebuilding and humanitarian efforts. This has created a growing need for educated leaders in the sport-based youth development field as the job market in this field continues to expand. The…

Program Monitoring: The Role of Leadership in Planning, Assessment, and Communication. REL 2014-034

ERIC Educational Resources Information Center

Malone, Nolan; Narayan, Krishna; Mark, Lauren; Miller, Kirsten; Kekahio, Wendy

2014-01-01

As educators are increasingly called on to use data to inform improvement initiatives (and are being held accountable for doing so), there is a corresponding need for program leaders to monitor progress. Program monitoring--the systematic and continual observation and recording of key program aspects--can provide leaders with realistic assessments…

Mechanisms for secondary eyewall formation, and cold-air damming: Tropical cyclone interactions

NASA Astrophysics Data System (ADS)

Garcia-Rivera, Jose Manuel

This dissertation consists of two topics, the mechanisms leading to secondary eyewall formation in tropical cyclones, and effects of tropical cyclone---cold-air interactions on heavy precipitation. The first research topic involves a proposed coupled mechanism for secondary eyewall formation (SEF; initiation of an eyewall replacement cycle), using a WRF-ARW simulation of Hurricane Katrina (2005). The storm underwent a series of structural changes that were deemed necessary for the cycle to begin. These included a significant increase of rainband activity in the SEF region and the eventual vertical coupling of azimuthal-mean updrafts that led to cycle initiation. Increased rainband activity outside the primary eyewall in the hours before was mostly related to an intensifying main feeder band. Close to initiation, an updraft (explained by a pre-existing hypothesis) emerged outside the primary eyewall near the top of the boundary layer (BL). This updraft then intensified and extended both upward and outward, while the storm intensified and approached SEF. Eventually, the updraft coupled with the upward motion associated with rainband-related convection near the SEF radius. Once the alignment occurred, the deep updraft quickly organized to support deep convection that led to SEF within hours of initiation. The coupling of updrafts emanating from the BL with the environmental upward motion associated with the pre-existing rainband activity is proposed to be the key for SEF initiation in this case. The second topic investigates the interactions between an Appalachian cold-air damming event and the near-passage of Tropical Storm Kyle (2002) along the coastal Carolinas, as assessed by using a numerical weather prediction model. While the storm moved along the coastline, it began extra-tropical transition, bringing heavy rains to both the coastal region and inland towards the Piedmont of North Carolina. Our goal is to quantify the effects of both interacting weather systems on heavy precipitation in order to improve the dynamical understanding of such effects, as well as precipitation forecasts in the study region. A series of sensitivity tests were performed to isolate and quantify the effects of both systems on the total accumulated precipitation. It was found that (a) for this type of along-coast track, the pre-existing cold-air damming played only a minor role on the total accumulated precipitation, (b) the outer circulation of Kyle weakened the cold-air damming due to a redirection of the mean flow away from the east side of the Appalachian Mountains, and (c) the combination of Kyle with a shortwave mid to upper-level trough and a surface coastal front were responsible for the heavy precipitation experienced in the study area through the advection of moisture, vorticity, and the forcing of upward motion.

Oscillation of Surface PM2.5 Concentration Resulting from an Alternation of Easterly and Southerly Winds in Beijing: Mechanisms and Implications

NASA Astrophysics Data System (ADS)

Sun, Zhaobin; Zhang, Xiaoling; Zhao, Xiujuan; Xia, Xiangao; Miao, Shiguang; Li, Ziming; Cheng, Zhigang; Wen, Wei; Tang, Yixi

2018-04-01

We used simultaneous measurements of surface PM2.5 concentration and vertical profiles of aerosol concentration, temperature, and humidity, together with regional air quality model simulations, to study an episode of aerosol pollution in Beijing from 15 to 19 November 2016. The potential effects of easterly and southerly winds on the surface concentrations and vertical profiles of the PM2.5 pollution were investigated. Favorable easterly winds produced strong upward motion and were able to transport the PM2.5 pollution at the surface to the upper levels of the atmosphere. The amount of surface PM2.5 pollution transported by the easterly winds was determined by the strength and height of the upward motion produced by the easterly winds and the initial height of the upward wind. A greater amount of PM2.5 pollution was transported to upper levels of the atmosphere by upward winds with a lower initial height. The pollutants were diluted by easterly winds from clean ocean air masses. The inversion layer was destroyed by the easterly winds and the surface pollutants and warm air masses were then lifted to the upper levels of the atmosphere, where they re-established a multi-layer inversion. This region of inversion was strengthened by the southerly winds, increasing the severity of pollution. A vortex was produced by southerly winds that led to the convergence of air along the Taihang Mountains. Pollutants were transported from southern-central Hebei Province to Beijing in the boundary layer. Warm advection associated with the southerly winds intensified the inversion produced by the easterly winds and a more stable boundary layer was formed. The layer with high PM2.5 concentration became dee-per with persistent southerly winds of a certain depth. The polluted air masses then rose over the northern Taihang Mountains to the northern mountainous regions of Hebei Province.

Perceptions of Leaders and Clinician Educators on the Impact of International Accreditation.

PubMed

Archuleta, Sophia; Ibrahim, Halah; Stadler, Dora J; Shah, Nina G; Chew, Nicholas W; Cofrancesco, Joseph

2015-11-01

Graduate medical education (GME) is responding to calls for reform by adopting competency-based frameworks and, in some countries, by rapidly implementing external accreditation systems. The Accreditation Council for Graduate Medical Education International (ACGME-I) began accrediting institutions in 2009. This study aimed to describe ACGME-I-accredited institutions and explore perceptions of their leaders and clinician educators (CEs) regarding preparedness, challenges, and initial impact of accreditation. Cross-sectional surveys of all ACGME-I-accredited institutions' leaders and CEs were conducted from June 2013 to June 2014. Eligible participants were identified through institution Web sites and GME offices. Combinations of Web- and paper-based surveys were employed. Completed surveys were received from 24 (70.6%) of 34 institutional leaders and 274 (76.3%) of 359 CEs, representing 3 countries, 8 academic medical centers, 2 affiliated teaching hospitals, and 47 residency programs. Leaders and CEs felt prepared in the domains of knowledge and implementation of the competencies. Top challenges were excessive "demands on faculty time" and "bureaucratic procedures." The majority of both groups perceived a positive impact of accreditation on all learner, faculty, institution, and patient outcomes; most perceived no impact on patient satisfaction. Overall, 79.2% of leaders and 75.8% of CEs agreed or strongly agreed that seeking ACGME-I accreditation was worthwhile. This study indicates that despite the challenges identified, initial perceptions of the impact of ACGME-I accreditation are positive. Findings from this study may be useful to institutions and countries considering similar GME reform, though long-term outcome data are needed.

Modeling the plasma chemistry of stratospheric Blue Jet streamers

NASA Astrophysics Data System (ADS)

Winkler, Holger; Notholt, Justus

2014-05-01

Stratospheric Blue Jets (SBJs) are upward propagating discharges in the altitude range 15-40 km above thunderstorms. The currently most accepted theory associates SBJs to the development of the streamer zone of a leader. The streamers emitted from the leader can travel for a few tens of kilometers predominantly in the vertical direction (Raizer et al., 2007). The strong electric fields at the streamer tips cause ionisation, dissociation, and excitation, and give rise to chemical perturbations. While in recent years the effects of electric discharges occurring in the mesosphere (sprites) have been investigated in a number of model studies, there are only a few studies on the impact of SBJs. However, chemical perturbations due to SBJs are of interest as they might influence the stratospheric ozone layer. We present results of detailed plasma chemistry simulations of SBJ streamers for both day-time and night-time conditions. Any effects of the subsequent leader are not considered. The model accounts for more than 500 reactions and calculates the evolution of the 88 species under the influence of the breakdown electric fields at the streamer tip. As the SBJ dynamics is outside the scope of this study, the streamer parameters are prescribed. For this purpose, electric field parameters based on Raizer et al. (2007) are used. The model is applied to the typical SBJ altitude range 15-40 km. The simulations indicate that SBJ streamers cause significant chemical perturbations. In particular, the liberation of atomic oxygen during the discharge leads to a formation of ozone. At the same time, reactive nitrogen and hydrogen radicals are produced which will cause catalytic ozone destruction. Reference: Raizer et al. (2007), J. Atmos. Solar-Terr. Phys., 69 (8), 925-938.

Study Provides Insights into Diagnosis, Treatment of Rare Immune Disease: Autoimmmune Lymphoproliferative Syndrome ...

MedlinePlus

... Award Negotiation & Initial Award After Award Foreign Grants Management Getting Your Initial International Award Actions You Can Take as the Project Leader on a Foreign Grant Subawards for Foreign ...

Relationship between Political Discrimination Level Perceived by Teachers and Teachers' Organizational Cynicism Levels

ERIC Educational Resources Information Center

Keskinkilic Kara, Sultan Bilge; Oguz, Ebru

2016-01-01

Problem Statement: Political discrimination is directed against individuals on the basis of their political party membership and views, including their sociopolitical and moral attitudes. People subjected to discrimination have a high level of professional exhaustion, slow upward career mobility, low morale and performance, less initiative,…

Beyond Turnaround: A Synthesis of Relevant Frameworks for Leaders of Sustained Improvement in Previously Low-Performing Schools

ERIC Educational Resources Information Center

Hitt, Dallas Hambrick; Meyers, Coby V.

2018-01-01

We understand very little about what is special that leaders do to facilitate improvement that is both transformational and lasting in previously persistently failing schools in the United States. Relatively little is understood about change not just during the initial turnaround stage, but that "endures" on the larger journey as the…

More than Just Test Scores: Leading for Improvement with an Alternative Community-Driven Accountability Metric

ERIC Educational Resources Information Center

Spain, Angeline; McMahon, Kelly

2016-01-01

In this case, Sharon Rowley, a veteran principal, volunteers to participate in a new community-driven accountability initiative and encounters dilemmas about what it means to be a "data-driven" instructional leader. This case provides an opportunity for aspiring school leaders to explore and apply data-use theory to the work of leading…

Teambuilding: A Strategic Leader Imperative

DTIC Science & Technology

2006-03-10

at least initially) examples from the private sector. Yet looking to leaders like Jack Welch, former CEO for General Electric, and Warren Buffett , a...at Division Command Level – 2004. Ulmer, Shaler, Bullis, DiClemente, and Jacobs – 5 Nov 2004, 10. 44 “ Warren Buffet Biography,” available from http:// beginnersinvest.about.com/cs / warrenbuffett/a/aawarrenbio.htm; accessed 8 March 2006.

School Leaders' Perceptions of the Impact of Extended Services on Families and Communities: The Case of One Local Authority

ERIC Educational Resources Information Center

Peterson, Andrew; Durrant, Ian

2013-01-01

The move in England towards extended services was a core part of the educational policy of successive Labour governments throughout the 2000s. Sitting alongside like-minded initiatives, school leaders were encouraged to envision, plan for and operate a range of activities and services aimed at deepening and extending schools' relationships with…

Literacy Leader Fellowship Program Reports. Part I in a Series. Framework for Developing Skill Standards for Workplace Literacy.

ERIC Educational Resources Information Center

Askov, Eunice N.

This document describes two activities of the Literacy Leader Fellowship research project, which addressed the needs of adult educators for knowledge of job skills and of business and unions for information about adult literacy efforts. The first section describes the following efforts related to skill standards and other policy initiatives: (1)…

How Do School Leaders Navigate ICT Educational Reform? Policy Learning Narratives from a Singapore Context

ERIC Educational Resources Information Center

Chua Reyes, Vicente

2015-01-01

The purpose of this research inquiry focuses on how school leaders "make sense" of educational reform in their local contexts. In order to do this, an exploratory qualitative case study of two schools that took part in policy reform initiatives directed at ubiquitous use of information communication and technology (ICT) in the Singapore…

Research at the Crossroads: How Intellectual Initiatives across Disciplines Evolve

ERIC Educational Resources Information Center

Frost, Susan H.; Jean, Paul M.; Teodorescu, Daniel; Brown, Amy B.

2004-01-01

How do intellectual initiatives across disciplines evolve? This qualitative case study of 11 interdisciplinary research initiatives at Emory University identifies key factors in their development: the passionate commitments of scholarly leaders, the presence of strong collegial networks, access to timely and multiple resources, flexible practices,…

Exploring Leadership in Schools-Based iPad Initiatives: A Case Study

ERIC Educational Resources Information Center

Harrold, Richard

2017-01-01

The world's first school-based one-to-one iPad initiative was implemented in a British school in 2010. Every year since, more iPad initiatives have been implemented in British schools, with school leaders citing various reasons for introducing them. However, results of iPad initiatives have not always matched expectations. British schools are also…

Science Teacher Leaders: Exploring Practices and Potential

NASA Astrophysics Data System (ADS)

Stinson, John Kevin

It has become standard practice for teachers to step into the role of "teacher leaders" and perform a variety of curriculum, instruction and assessment tasks for schools and school districts. The literature regarding these Ohio K-12 teacher leaders, who may perform these tasks in addition to or in lieu of regular teaching assignments, rarely includes a disciplinary focus. In this exploratory, descriptive study the results of a web-based survey containing both closed and open-ended items were used in an inquiry into teacher leaders working with the discipline of science. Data from Ohio teachers responding to the survey were used first to create a standard profile for science teacher leaders. Descriptive statistics and correlations were then performed on quantitative survey data to explore science teacher leader tasks and factors that influence task performance. Analysis of data included descriptions of sense of purpose for their role held by these science teacher leaders. Results indicate that science teacher leaders appear to embrace their role as advocates for science and have great potential for implementing science education reform as well as other science-related school initiatives. Aligning performance, administrative oversight, impact on student achievement and teacher training concerning tasks science teacher leaders are expected to perform would enhance this potential. However, science teacher leaders face challenges to realizing that potential due to ambiguity of their leadership role, the breadth of tasks they tend to perform and lack of alignment between task and outcomes.

Leader's opinion priority bounded confidence model for network opinion evolution

NASA Astrophysics Data System (ADS)

Zhu, Meixia; Xie, Guangqiang

2017-08-01

Aiming at the weight of trust someone given to participate in the interaction in Hegselmann-Krause's type consensus model is the same and virtual social networks among individuals with different level of education, personal influence, etc. For differences between agents, a novelty bounded confidence model was proposed with leader's opinion considered priority. Interaction neighbors can be divided into two kinds. The first kind is made up of "opinion leaders" group, another kind is made up of ordinary people. For different groups to give different weights of trust. We also analyzed the related characteristics of the new model under the symmetrical bounded confidence parameters and combined with the classical HK model were analyzed. Simulation experiment results show that no matter the network size and initial view is subject to uniform distribution or discrete distribution. We can control the "opinion-leader" good change the number of views and values, and even improve the convergence speed. Experiment also found that the choice of "opinion leaders" is not the more the better, the model well explain how the "opinion leader" in the process of the evolution of the public opinion play the role of the leader.

Refining and validating a conceptual model of Clinical Nurse Leader integrated care delivery.

PubMed

Bender, Miriam; Williams, Marjory; Su, Wei; Hites, Lisle

2017-02-01

To empirically validate a conceptual model of Clinical Nurse Leader integrated care delivery. There is limited evidence of frontline care delivery models that consistently achieve quality patient outcomes. Clinical Nurse Leader integrated care delivery is a promising nursing model with a growing record of success. However, theoretical clarity is necessary to generate causal evidence of effectiveness. Sequential mixed methods. A preliminary Clinical Nurse Leader practice model was refined and survey items developed to correspond with model domains, using focus groups and a Delphi process with a multi-professional expert panel. The survey was administered in 2015 to clinicians and administrators involved in Clinical Nurse Leader initiatives. Confirmatory factor analysis and structural equation modelling were used to validate the measurement and model structure. Final sample n = 518. The model incorporates 13 components organized into five conceptual domains: 'Readiness for Clinical Nurse Leader integrated care delivery'; 'Structuring Clinical Nurse Leader integrated care delivery'; 'Clinical Nurse Leader Practice: Continuous Clinical Leadership'; 'Outcomes of Clinical Nurse Leader integrated care delivery'; and 'Value'. Sample data had good fit with specified model and two-level measurement structure. All hypothesized pathways were significant, with strong coefficients suggesting good fit between theorized and observed path relationships. The validated model articulates an explanatory pathway of Clinical Nurse Leader integrated care delivery, including Clinical Nurse Leader practices that result in improved care dynamics and patient outcomes. The validated model provides a basis for testing in practice to generate evidence that can be deployed across the healthcare spectrum. © 2016 John Wiley & Sons Ltd.

The Leader Ship Is Sinking: A Temporal Investigation of Narcissistic Leadership.

PubMed

Ong, Chin Wei; Roberts, Ross; Arthur, Calum A; Woodman, Tim; Akehurst, Sally

2016-04-01

Individuals higher in narcissism have leader emergent tendencies. The characteristics of their personality suggest, however, that their leadership qualities will decrease over time as a function of group acquaintance. We present data from two studies that provide the first empirical support for this theoretical position within a transformational leadership framework. In Study 1 (N = 112), we tested narcissistic leadership qualities in groups of unacquainted individuals over a 12-week period. In Study 2 (N = 152), we adopted the same protocol with groups of acquainted individuals. In Study 1, narcissism was positively associated with peer-rated leadership during initial group formation but not later. In Study 2, narcissism was not significantly associated with peer-rated leadership during initial group formation and was negatively associated with peer-rated leadership later. In Study 1, transformational leadership mediated the relationship between narcissism and leadership initially but not later on. In Study 2, transformational leadership failed to mediate the relationship between narcissism and leadership throughout the study. Despite enjoying a honeymoon period of leadership, the appeal and attractiveness of the narcissistic leader rapidly wane. This decline is explained in part by their changing transformational leadership qualities. © 2014 Wiley Periodicals, Inc.

Clean Energy Manufacturing Initiative

DOE Office of Scientific and Technical Information (OSTI.GOV)

None

2013-04-01

The initiative will strategically focus and rally EERE’s clean energy technology offices and Advanced Manufacturing Office around the urgent competitive opportunity for the United States to be the leader in the clean energy manufacturing industries and jobs of today and tomorrow.

Improving the Leader Development Experience in Army Units

DTIC Science & Technology

2013-04-01

conditions and creating a “ sweet spot” between order and chaos and simplicity and complexity, leaders can modify the experience to better align it with...subordinates to exercise initiative, overcome adversity, consider innovative solutions, or taste failure may not achieve maximum growth and are not...division commander’s behavior, preferences , and priorities become known down to battalion and lower levels.49 Some might view these techniques as

Fiscal Issues in Higher Education: The 1980's. Report on Four Conferences (1978-1980) of Academic Leaders and Executive Officers of Life Insurance Companies.

ERIC Educational Resources Information Center

Rigolot, Carol

Fiscal issues in higher education are considered, based on four conferences attended by academic and business leaders. After an initial conference of college and life insurance company presidents at Princeton University in 1978, three regional meetings were held in Greensboro, North Carolina; Kalamazoo, Michigan; and Boston, Massachusetts.…

The Relationship of Emotional Competencies to Transformational Leadership: Using a Corporate Model to Assess the Dispositions of Educational Leaders

ERIC Educational Resources Information Center

Hackett, Paul T.; Hortman, J. William

2008-01-01

The work of Goleman (1998) in the area of Emotional Intelligence offers promise for the assessment and evaluation of leader behaviors not related to a technical skill set such as those related to finance, data analysis, curriculum alignment, law or strategic planning. Researchers at a West Central Georgia University initiated a project that…

"We Don't Talk about Undocumented Status… We Talk about Helping Children": How School Leaders Shape School Climate for Undocumented Immigrants

ERIC Educational Resources Information Center

Crawford, Emily; Witherspoon Arnold, Noelle

2017-01-01

The racial/ethnic tensions, policies, and practices in society can be mirrored in spaces and institutions like schools. In schools, sociopolitical discourses can be reproduced and protected in institutional policies. One way K-12 leaders can initiate change and limit marginalization of students is by creating a school environment that accepts and…

78 FR 18326 - Agency Information Collection Activities; Comment Request; Upward Bound and Upward Bound Math...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-26

...; Comment Request; Upward Bound and Upward Bound Math Science Annual Performance Report AGENCY: The Office... considered public records. Title of Collection: Upward Bound and Upward Bound Math Science Annual Performance...) and Upward Bound Math and Science (UBMS) Programs. The Department is requesting a new APR because of...

Variability of electromagnetic signatures of lightning initiation observed in the West Mediterranean basin

NASA Astrophysics Data System (ADS)

Kolmasova, I.; Santolik, O.; Defer, E.; Stéphane, P.; Lan, R.; Uhlir, L.; Coquillat, S.; Lambert, D.; Pinty, J. P.; Prieur, S.

2016-12-01

Lightning discharges to ground often exhibit millisecond-scale surges in the continuing currents following return strokes, called M-components. Relatively little is known regarding the source of M-component charge and the mechanisms by which that charge is transferred to ground. In this work, we seek to directly address these questions by presenting correlated high-speed video and Lightning Mapping Array (LMA) observations of a bi-directional leader that resulted in an M-component occurring in a rocket-and-wire triggered lightning flash. The observed leader initiated in the decayed remnants of a positive leader channel that had traversed virgin air approximately 90 msec prior. Three-dimensional locations and speeds of the photographed bi-directional leader and M-component processes are calculated by mapping video images to the observed LMA channel geometry. Both ends of the bi-directional leader exhibited speeds on the order of 2 x106 m sec-1 over 570 meters of the visible channel. Propagation of the luminosity wave from the in-cloud leader to ground ( 8.8 km channel length) exhibited appreciable dispersion, with rise-times (10-90%) increasing from 330 to 410 μsec and pulse-widths (half-maximum) increasing from 380 to 810 μsec - the M-component current pulse measured at ground-level exhibited a rise-time of 290 μsec and a pulse-width of 770 μsec. Group velocities of the luminosity wave have been calculated as a function of frequency, increasing from 2 x107 to 6 x107 m sec-1 over the dominant signal bandwidth (DC to 2 kHz). Additionally, multiple waves of luminosity are observed within the in-cloud channel, indicating nuanced wave phenomena possibly associated with reflection from the end of the leader channel and attachment with the main lightning channel carrying continuing current to ground.

An Investigation of Double Bass Vibrato Characteristics

ERIC Educational Resources Information Center

Mick, James

2015-01-01

The purpose of this study was to investigate and describe various vibrato characteristics of university double bass students. The primary objectives were: (1) to describe vibrato rate and width for commonly used fingers in first, fourth, and thumb positions; (2) to investigate whether students initiate vibrato in an upward or downward direction;…

Thinking Broadly: Financing Strategies for Child Traumatic Stress Initiatives. Financing Strategies Series

ERIC Educational Resources Information Center

Gray, Aracelis; Szekely, Amanda

2006-01-01

There is growing recognition of the impact of exposure to trauma on the social and emotional development of children and adolescents, and this recognition has spurred initiatives to improve the standard of care and increase the identification, diagnosis, and treatment of child trauma. Leaders of child traumatic stress (CTS) initiatives recognize…

A Model for System-Wide Collaboration to Support Integrated Social Behavior and Literacy Evidence-Based Practices

ERIC Educational Resources Information Center

Chaparro, Erin A.; Smolkowski, Keith; Baker, Scott K.; Hanson, Natalie; Ryan-Jackson, Kathleen

2012-01-01

In the face of dwindling financial resources, educational leaders are looking to refine resource allocation while maintaining a focus on improved student outcomes. This article presents initial findings from a professional development state initiative called Effective Behavioral and Instructional Support Systems (EBISS). The EBISS initiative aims…

Intellectual Initiatives at a Research University: Origins, Evolutions, and Challenges.

ERIC Educational Resources Information Center

Frost, Susan H.; Jean, Paul M.; Teodorescu, Daniel; Brown, Amy B.

This qualitative case study explored the origins, evolutions, and challenges of 12 cross-disciplinary intellectual initiatives at 1 research university. Researchers conducted open-ended interviews with leaders of the 12 initiatives and used program literature to support the data gathered from the interviews. The study found that key factors such…

Influence of gravity of the photomorphism of secondary moss protonemata

NASA Astrophysics Data System (ADS)

Ripetskyj, R. T.; Kit, N. A.; Chaban, Ch. I.

1999-01-01

In dark-grown plantlets of the moss, Pottia intermedia, negatively gravitropic secondary protonemata differentiate from the superficial cells of leafy shoots. When transferred to the light, distal parts of the protonemata nearest to the apical cells begin to ramify and the apical cells of the side branches as well as of the main protonemal filaments often differentiate as buds. Dark-grown protonemata were oriented horizontally and illuminated from below with white light of different intensities. Only light with an intensity of 4.5 μmol.m-2.s-1 was sufficient to induce: (a) phototropism in the apical cells, (b) light-directed initiation of branch primordia, and (c) directed growth of side branches and bud differentiation. Apical cells illuminated with light of lower (0.03-0.37 μmol.-2.s-1) intensity grew upwards (i.e., away from the light). It was shown that this upward growth was determined by the action of gravity. Although initiation of branch primordia was only slightly affected, their growth was strongly stimulated on the upper side of the protonemata.

Attentional sensitivity and asymmetries of vertical saccade generation in monkey

NASA Technical Reports Server (NTRS)

Zhou, Wu; King, W. M.; Shelhamer, M. J. (Principal Investigator)

2002-01-01

The first goal of this study was to systematically document asymmetries in vertical saccade generation. We found that visually guided upward saccades have not only shorter latencies, but higher peak velocities, shorter durations and smaller errors. The second goal was to identify possible mechanisms underlying the asymmetry in vertical saccade latencies. Based on a recent model of saccade generation, three stages of saccade generation were investigated using specific behavioral paradigms: attention shift to a visual target (CUED paradigm), initiation of saccade generation (GAP paradigm) and release of the motor command to execute the saccade (DELAY paradigm). Our results suggest that initiation of a saccade (or "ocular disengagement") and its motor release contribute little to the asymmetry in vertical saccade latency. However, analysis of saccades made in the CUED paradigm indicated that it took less time to shift attention to a target in the upper visual field than to a target in the lower visual field. These data suggest that higher attentional sensitivity to targets in the upper visual field may contribute to shorter latencies of upward saccades.

Formative research to identify community partnerships and foster relationships for health promotion research in South Mississippi.

PubMed

Lemacks, J; Landry, A; Wenzler, P

2018-06-01

The purpose of this short communication is to describe the trust building and collaboration, fostering phases of a community-academic partnership between churches and academic researchers using a community-based participatory research approach. An academic-community partnership with church leaders was initiated using survey administration and was further developed using focus groups. A coalition was developed, and it guided a subsequent focus group with church members. Most churches surveyed did not have a health ministry in place but were agreeable that a variety of health topics were appropriate for the church setting. Church leaders felt that church members were key to engage in health programs in the church, whereas church members viewed pastoral support as important. Church leaders felt that working with a university brings credibility to their own health programs. This early work provides a valuable example of how community collaborations may be initiated and developed using formative research methods, serving both community and research agendas. Published by Elsevier Ltd.

Correlations between gravitropic curvature and auxin movement across gravistimulated roots of Zea mays

NASA Technical Reports Server (NTRS)

Young, L. M.; Evans, M. L.; Hertel, R.

1990-01-01

We compared the kinetics of auxin redistribution across the caps of primary roots of 2-day-old maize (Zea mays, cv Merit) seedlings with the time course of gravitropic curvature. [3H] indoleacetic acid was applied to one side of the cap in an agar donor and radioactivity moving across the cap was collected in an agar receiver applied to the opposite side. Upon gravistimulation the roots first curved upward slightly, then returned to the horizontal and began curving downward, reaching a final angle of about 67 degrees. Movement of label across the caps of gravistimulated roots was asymmetric with preferential downward movement (ratio downward/upward = ca. 1.6, radioactivity collected during the 90 min following beginning of gravistimulation). There was a close correlation between the development of asymmetric auxin movement across the root cap and the rate of curvature, with both values increasing to a maximum and then declining as the roots approached the final angle of curvature. In roots preadapted to gravity (alternate brief stimulation on opposite flanks over a period of 1 hour) the initial phase of upward curvature was eliminated and downward bending began earlier than for controls. The correlation between asymmetric auxin movement and the kinetics of curvature also held in comparisons between control and preadapted roots. Both downward auxin transport asymmetry and downward curvature occurred earlier in preadapted roots than in controls. These findings are consistent with suggestions that the root cap is not only the site of perception but also the location of the initial redistribution of effectors that ultimately leads to curvature.

[Japanese who affected modern medicine in Taiwan: obstetrics and gynecology].

PubMed

Wang, Ming-Tung

2009-12-01

This text describes the leaders who established the modem obstetrics and gynecology for Taiwan. during the Japan-colonizing period (1895-1945). These leaders are Mr. Kawasoye, M., Mr. Mukae K., and Mr. Magara M. The lives of these leaders were different, but they all strongly contributed to the development of modem obstetrics and gynecology in Taiwan. With regard to the passage of time, Mr. Kawasoye contributed the initial efforts, Mr. Mukae worked during the flourishing period of the clinic; and Mr. Magara worked during the mature period, emphasizing research. These three periods are closely correlated with the course of the development of modem obstetrics and gynecology in Taiwan.

Creating your own leadership brand.

PubMed

Kerfoot, Karlene

2002-01-01

Building equity in a brand happens through many encounters. The initial attraction must be followed by the meeting of expectations. This creates a loyalty that is part of an emotional connection to that brand. This is the same process people go through when they first meet a leader and decide if this is a person they want to buy into. People will examine your style, your competence, and your standards. If you fail on any of these fronts, your ability to lead will be severely compromised. People expect more of leaders now, because they know and recognize good leaders. And, predictably, people are now more cynical of leaders because of the well-publicized excess of a few leaders who advanced their own causes at the expense of their people and their financial future. This will turn out to be a good thing, because it will create a higher standard of leadership that all must aspire to achieve. When the bar is raised for us, our standards of performance are also raised.

Engaging religious leaders to support HIV prevention and care for gays, bisexual men, and other men who have sex with men in coastal Kenya.

PubMed

Gichuru, Evans; Kombo, Bernadette; Mumba, Noni; Sariola, Salla; Sanders, Eduard J; van der Elst, Elise M

2018-01-01

In Kenyan communities, religious leaders are important gatekeepers in matters of health and public morality. In a context that is generally homophobic, religious leaders may aggravate or reduce stigmatization of sexual minorities such as gay and bisexual men, and other men who have sex with men (GBMSM). Literature indicates mixed results in efforts to encourage religious leaders to work effectively and sensitively with issues regarding HIV and sexuality. This paper describes the implementation of an engagement intervention with religious leaders from different denominations, which took place following a homophobic hate attack that was led by local religious leaders, at an HIV research clinic for GBMSM on the Kenyan coast. After the homophobic attack, tailored engagement activities, including a comprehensive four-day online sensitivity training course took place between June 2015 and October 2016 in the Kenyan coast. HIV researchers, together with trained GBMSM activists, organized the series of engagement activities for religious leaders which unfolded iteratively, with each subsequent activity informed by the results of the previous one. Facilitated conversations were used to explore differences and disagreements in relation to questions of scripture, mission, HIV, and human sexuality. As a result, researchers noted that many religious leaders, who initially expressed exceedingly negative attitudes towards GBMSM, started to express far more accepting and supportive views of sexuality, sexual identities, and same-sex relations. This paper describes the changes in religious leaders' discourses relating to GBMSM, and highlights the possibility of using engagement interventions to build trust between research institutes, religious leaders, and GBMSM.

Binding of mitochondrial leader sequences to Tom20 assessed using a bacterial two-hybrid system shows that hydrophobic interactions are essential and that some mutated leaders that do not bind Tom20 can still be imported.

PubMed

Mukhopadhyay, Abhijit; Yang, Chun-Song; Weiner, Henry

2006-12-01

Previous studies pointed to the importance of leucine residues in the binding of mitochondrial leader sequences to Tom20, an outer membrane protein translocator that initially binds the leader during import. A bacteria two-hybrid assay was here employed to determine if this could be an alternative way to investigate the binding of leader to the receptor. Leucine to alanine and arginine to glutamine mutations were made in the leader sequence from rat liver aldehyde dehydrogenase (pALDH). The leucine residues in the C-terminal of pALDH leader were found to be essential for TOM20 binding. The hydrophobic residues of another mitochondrial leader F1beta-ATPase that were important for Tom20 binding were found at the C-terminus of the leader. In contrast, it was the leucines in the N-terminus of the leader of ornithine transcarbamylase that were essential for binding. Modeling the peptides to the structure of Tom20 showed that the hydrophobic residues from the three proteins could all fit into the hydrophobic binding pocket. The mutants of pALDH that did not bind to Tom20 were still imported in vivo in transformed HeLa cells or in vitro into isolated mitochondria. In contrast, the mutant from pOTC was imported less well ( approximately 50%) while the mutant from F1beta-ATPase was not imported to any measurable extent. Binding to Tom20 might not be a prerequisite for import; however, it also is possible that import can occur even if binding to a receptor component is poor, so long as the leader binds tightly to another component of the translocator.

Michigan's Talent Crisis: The Economic Case for Rebuilding Michigan's Broken Public Education System. Michigan Achieves! 2016 Michigan State of Education Report

ERIC Educational Resources Information Center

Arellano, Amber; Bedi, Suneet; Gallagher, Terry

2016-01-01

In recent months business leaders across the state have committed to a new effort to make Michigan a top ten education state by 2030. The Michigan Achieves initiative is designed to make that ambitious and urgent goal happen for "all" students in the state. These leaders know with certainty what others in Michigan are beginning to grasp:…

Sir William Howe: A Study in Failed Strategic Leadership

DTIC Science & Technology

2013-03-01

his shortcomings as a strategic leader to provide insight for future leaders. To accomplish this, the paper provides a basic description of the...these shortcomings were not necessarily a recipe for disaster. However, they do give an appreciation of Howe’s initial preparedness in terms of...British from Boston the French began to seriously consider the possibilities of an American victory.”35 15 From the British perspective

The Large Space Structures Technology Program

DTIC Science & Technology

1992-04-01

Organization and Plan--The LSSTP was initiated in July 1985. It was conceived by Jerome Pearson, who, as leader of the Vibration Group, was responsible... Jerome Pearson was named project manager and Terry Hertz from the Analysis and Optimization Branch was his deputy. The technical disciplines and the...continued until the end of 1990. The LSSTP was originally managed by Jerome Pearson, in addition to his responsibilities as Vibration Group leader. Terry

2014 Center for Army Leadership Annual Survey of Army Leadership (CASAL): Army Civilian Leader Findings

DTIC Science & Technology

2015-06-01

at preparing them for future responsibilities. Engagement is a measure of initiative and productivity . It is highest among civilian leaders but is at...are reported to exhibit counter- productive or negative leadership behaviors such as berating subordinates for small mistakes (15%), blaming other...outcomes (e.g., employee satisfaction, motivation, job performance) and organizational outcomes (e.g., turnover and absenteeism ). CASAL results

Modeling of transmission line exposure to direct lightning strokes

DOE Office of Scientific and Technical Information (OSTI.GOV)

Rizk, F.A.M.

1990-10-01

The paper introduces a new model for assessing the exposure of free-standing structures and horizontal conductors above flat ground to direct lightning strokes. The starting point of this work is a recently developed criterion for positive leader inception, modified to account for positive leaders initiated under the influence of a negative descending lightning stroke. Subsequent propagation of the positive leader is analyzed to define the point of encounter of the two leaders which determines the attractive radius of a structure or the attractive lateral distance of a conductor. These parameters are investigated for a wide range of heights and return-strokemore » currents. A method for analyzing shielding failure and determining the critical shielding angle is also described. The predictions of the model are compared with field observations and previously developed models.« less

Sequences spanning the leader-repeat junction mediate CRISPR adaptation to phage in Streptococcus thermophilus

PubMed Central

Wei, Yunzhou; Chesne, Megan T.; Terns, Rebecca M.; Terns, Michael P.

2015-01-01

CRISPR-Cas systems are RNA-based immune systems that protect prokaryotes from invaders such as phages and plasmids. In adaptation, the initial phase of the immune response, short foreign DNA fragments are captured and integrated into host CRISPR loci to provide heritable defense against encountered foreign nucleic acids. Each CRISPR contains a ∼100–500 bp leader element that typically includes a transcription promoter, followed by an array of captured ∼35 bp sequences (spacers) sandwiched between copies of an identical ∼35 bp direct repeat sequence. New spacers are added immediately downstream of the leader. Here, we have analyzed adaptation to phage infection in Streptococcus thermophilus at the CRISPR1 locus to identify cis-acting elements essential for the process. We show that the leader and a single repeat of the CRISPR locus are sufficient for adaptation in this system. Moreover, we identified a leader sequence element capable of stimulating adaptation at a dormant repeat. We found that sequences within 10 bp of the site of integration, in both the leader and repeat of the CRISPR, are required for the process. Our results indicate that information at the CRISPR leader-repeat junction is critical for adaptation in this Type II-A system and likely other CRISPR-Cas systems. PMID:25589547

Improved fourth-year medical student clinical decision-making performance as a resuscitation team leader after a simulation-based curriculum.

PubMed

Ten Eyck, Raymond P; Tews, Matthew; Ballester, John M; Hamilton, Glenn C

2010-06-01

To determine the impact of simulation-based instruction on student performance in the role of emergency department resuscitation team leader. A randomized, single-blinded, controlled study using an intention to treat analysis. Eighty-three fourth-year medical students enrolled in an emergency medicine clerkship were randomly allocated to two groups differing only by instructional format. Each student individually completed an initial simulation case, followed by a standardized curriculum of eight cases in either group simulation or case-based group discussion format before a second individual simulation case. A remote coinvestigator measured eight objective performance end points using digital recordings of all individual simulation cases. McNemar chi2, Pearson correlation, repeated measures multivariate analysis of variance, and follow-up analysis of variance were used for statistical evaluation. Sixty-eight students (82%) completed both initial and follow-up individual simulations. Eight students were lost from the simulation group and seven from the discussion group. The mean postintervention case performance was significantly better for the students allocated to simulation instruction compared with the group discussion students for four outcomes including a decrease in mean time to (1) order an intravenous line; (2) initiate cardiac monitoring; (3) order initial laboratory tests; and (4) initiate blood pressure monitoring. Paired comparisons of each student's initial and follow-up simulations demonstrated significant improvement in the same four areas, in mean time to order an abdominal radiograph and in obtaining an allergy history. A single simulation-based teaching session significantly improved student performance as a team leader. Additional simulation sessions provided further improvement compared with instruction provided in case-based group discussion format.

Building Capability, Empowering Students, and Achieving Success: The Financial Empowerment for Student Success Initiative

ERIC Educational Resources Information Center

Broun, Dan

2014-01-01

The Financial Empowerment for Student Success (FESS) Initiative was a two-year initiative focused on increasing student success through the provision of financial services. Achieving the Dream, Inc. and MDC, Inc. joined together, with funding from the Bank of America Charitable Foundation, to support three Achieving the Dream Leader Colleges to…

Development and Implementation of an International Counseling Outreach Effort in Bhutan: A Group Stage Conceptualization

ERIC Educational Resources Information Center

Guth, Lorraine J.; Lorelle, Sonya; Hinkle, J. Scott; Remley, Theodore P.

2015-01-01

This article highlights the development and implementation of an international counseling outreach program in Bhutan using a group stage conceptualization that includes the initial, transition, working, and final stages. The initial stage included a counseling initiative started by one of the queens as well as meetings with key leaders from the…

A Study of High School Improvement Initiatives and the Impact on School Achievement

ERIC Educational Resources Information Center

Randolph, Jack Lowell

2017-01-01

Educational reform is at the forefront of legislatures and school districts across the United States (Hattie, 2011). To find and employ high school improvement initiatives that lead to improved educational experiences for students, educational leaders must examine in great detail what systems have been successful and then modify the initiatives to…

Improving TSA’s Public Image: Customer-Focused Initiatives to Encourage Public Trust and Confidence

DTIC Science & Technology

2013-12-01

INITIATIVES TO ENCOURAGE PUBLIC TRUST AND CONFIDENCE Patricia S. Bierle Customer Support and Quality Improvement Manager, Transportation Security...PUBLIC IMAGE: CUSTOMER-FOCUSED INITIATIVES TO ENCOURAGE PUBLIC TRUST AND CONFIDENCE by Patricia S. Bierle December 2013 Thesis Co-Advisors...33 e . Government Leaders Impact Public Opinion ........................35 f. Aviation Stakeholders Also Impact

Finding Funding: A Guide to Federal Sources for Workforce Development Initiatives. Finding Funding Series

ERIC Educational Resources Information Center

Relave, Nannette

2005-01-01

This guide provides an overview of strategies for gaining access to and using federal funds, as well as a catalog of 87 funding sources that can potentially support workforce development initiatives for adults and youth. It is intended to help program developers, policy makers, and initiative leaders identify federal funding sources to support…

New mechanism for lightning initiation

DOE Office of Scientific and Technical Information (OSTI.GOV)

Roussel-Dupre, R.; Buchwald, M.; Gurevich, A.

1996-10-01

This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). To distinguish radio-frequency (rf) signals generated by lightning from the electromagnetic pulse produced by a nuclear explosion, it is necessary to understand the fundamental nature of thunderstorm discharges. The recent debate surrounding the origin of transionospheric pulse pairs (TIPPs) detected by the BLACKBEARD experiment aboard the ALEXIS satellite illustrates this point. We have argued that TIPP events could originate from the upward propagating discharges recently identified by optical images taken from the ground, from airplanes, and from the spacemore » shuttle. In addition, the Gamma Ray Observatory (GRO) measurements of x-ray bursts originating from thunderstorms are almost certainly associated with these upward propagating discharges. When taken together, these three measurements point directly to the runaway electron mechanism as the source of the upward discharges. The primary goal of this research effort was to identify the specific role played by the runaway-air-breakdown mechanism in the general area of thunderstorm electricity and in so doing develop lightning models that predict the optical, rf, and x-ray emissions that are observable from space.« less

The Mediation of Acculturation: Orchestrating School Leadership Development in England

ERIC Educational Resources Information Center

Wallace, Mike; Tomlinson, Michael; O'Reilly, Dermot

2011-01-01

Among western governments large-scale leadership development initiatives represent an increasingly deployed means of promoting the acculturation of school leaders to support educational reforms and ongoing improvement. England's sophisticated initiative centres on the National College for Leadership in Schools and Children's Services, a…

Trading Places? Sleeping with the Enemy?

ERIC Educational Resources Information Center

Williamson, Robyn; Boyd, Roy

1993-01-01

Examines the increasing cooperation between business and education in Australia, discussing some of the initiatives put forth by business leaders and educators. Initiatives undertaken by Deakin University have included a wide range of projects, courses, publications, and associations designed to improve understandings between business and early…

Hartford Gerontological Nursing Leaders: From Funding Initiative to National Organization.

PubMed

Van Cleave, Janet H; Szanton, Sarah L; Shillam, Casey; Rose, Karen; Rao, Aditi D; Perez, Adriana; O'Connor, Melissa; Walker, Rachel; Buron, Bill; Boltz, Marie; Bellot, Jennifer; Batchelor-Murphy, Melissa

2016-01-01

In 2000, the John A. Hartford Foundation established the Building Academic Geriatric Nursing Capacity Program initiative, acknowledging nursing's key role in the care of the growing population of older adults. This program has supported 249 nurse scientists with pre- and postdoctoral awards. As a result of the program's success, several Building Academic Geriatric Nursing Capacity Program awardees formed an alumni organization to continue to advance the quality care of older adults. This group of Building Academic Geriatric Nursing Capacity Program awardees joined others receiving support from the John A. Hartford Foundation nursing initiatives to grow a formal organization, the Hartford Gerontological Nursing Leaders (HGNL). The purpose of this article is to present the development, accomplishments, and challenges of the HGNL, informing other professional nursing organizations that are experiencing similar accomplishments and challenges. This article also demonstrates the power of a funding initiative to grow an organization dedicated to impact gerontological health and health care through research, practice, education, and policy. Copyright © 2016 Elsevier Inc. All rights reserved.

Youth Prevention. Technical Assistance Packet.

ERIC Educational Resources Information Center

Join Together, Boston, MA.

Prevention is the ultimate key to reversing the upward trend in the use of drugs and to empowering communities to address their drug problems. An essential factor is the development and implementation of initiatives to prevent illicit drug use. A goal of prevention for youth is to provide them with a set of skills and tools to help them resist the…

Engagement as Flourishing: The Contribution of Positive Emotions and Coping to Adolescents' Engagement at School and with Learning

ERIC Educational Resources Information Center

Reschly, Amy L.; Huebner, E. Scott; Appleton, James J.; Antaramian, Susan

2008-01-01

Fredrickson's (1998, 2001) broaden and build theory postulates that the experience of frequent positive emotions serves to broaden humans' thoughts and behaviors, resulting in accrual of resources, including coping resources, which catalyze upward spirals toward future well-being. Initial research supports the tenets of broaden and build; however,…

Safe male circumcision in Botswana: Tension between traditional practices and biomedical marketing

PubMed Central

Katisi, Masego; Daniel, Marguerite

2015-01-01

Botswana has been running Safe Male Circumcision (SMC) since 2009 and has not yet met its target. Donors like the US Centers for Disease Control and Prevention and Africa Comprehensive HIV/AIDS Partnership (funded by the Gates Foundation) in collaboration with Botswana's Ministry of Health have invested much to encourage HIV-negative men to circumcise. Demand creation strategies make use of media and celebrities. The objective of this paper is to explore responses to SMC in relation to circumcision as part of traditional initiation practices. More specifically, we present the views of two communities in Botswana on SMC consultation processes, implementation procedures and campaign strategies. The methods used include participant observation, in-depth interviews with key stakeholders (donors, implementers and Ministry officials), community leaders and men in the community. We observe that consultation with traditional leaders was done in a seemingly superficial, non-participatory manner. While SMC implementers reported pressure to deliver numbers to the World Health Organization, traditional leaders promoted circumcision through their routine traditional initiation ceremonies at breaks of two-year intervals. There were conflicting views on public SMC demand creation campaigns in relation to the traditional secrecy of circumcision. In conclusion, initial cooperation of local chiefs and elders turned into resistance. PMID:25866013

Safe male circumcision in Botswana: tension between traditional practices and biomedical marketing.

PubMed

Katisi, Masego; Daniel, Marguerite

2015-01-01

Botswana has been running Safe Male Circumcision (SMC) since 2009 and has not yet met its target. Donors like the US Centers for Disease Control and Prevention and Africa Comprehensive HIV/AIDS Partnership (funded by the Gates Foundation) in collaboration with Botswana's Ministry of Health have invested much to encourage HIV-negative men to circumcise. Demand creation strategies make use of media and celebrities. The objective of this paper is to explore responses to SMC in relation to circumcision as part of traditional initiation practices. More specifically, we present the views of two communities in Botswana on SMC consultation processes, implementation procedures and campaign strategies. The methods used include participant observation, in-depth interviews with key stakeholders (donors, implementers and Ministry officials), community leaders and men in the community. We observe that consultation with traditional leaders was done in a seemingly superficial, non-participatory manner. While SMC implementers reported pressure to deliver numbers to the World Health Organization, traditional leaders promoted circumcision through their routine traditional initiation ceremonies at breaks of two-year intervals. There were conflicting views on public SMC demand creation campaigns in relation to the traditional secrecy of circumcision. In conclusion, initial cooperation of local chiefs and elders turned into resistance.

The CNO and Leading Innovation: Competencies for the Future.

PubMed

Weatherford, Barbara; Bower, Kathleen A; Vitello-Cicciu, Joan

Although innovation is critical to success in today's tumultuous environment, health care is slow to embrace it, and there is significant variability in strategic adoption of innovation across organizations. Nurse leaders do not need to be innovators themselves but must engage in, and have the ability to create, an organizational culture of innovation. Twenty-six leadership behaviors specific to innovation leadership were identified through a Delphi study to develop competencies as well as the knowledge, skills, and attitudes that support nurse leaders in acquiring or expanding the capability of nurse leaders to create a culture of innovation. It was demonstrated that nursing innovation experts were able to differentiate between general leadership behaviors and innovation leader behaviors. In addition, the need to acquire basic leadership competencies before mastering innovation leader competencies was identified. Five strategies to initiate or expand a culture of innovation in organizations were identified, including (1) assessment of organizational capacity for innovation; (2) acknowledgement of the responsibility of all leaders to create an innovation-rich environment; (3) provision of education, skill building, and coaching; (4) encouragement of an ongoing practice of innovation, even in the face of failure; and (5) development of a sustainable culture of innovation.

Translational profiling of B cells infected with the Epstein-Barr virus reveals 5' leader ribosome recruitment through upstream open reading frames.

PubMed

Bencun, Maja; Klinke, Olaf; Hotz-Wagenblatt, Agnes; Klaus, Severina; Tsai, Ming-Han; Poirey, Remy; Delecluse, Henri-Jacques

2018-04-06

The Epstein-Barr virus (EBV) genome encodes several hundred transcripts. We have used ribosome profiling to characterize viral translation in infected cells and map new translation initiation sites. We show here that EBV transcripts are translated with highly variable efficiency, owing to variable transcription and translation rates, variable ribosome recruitment to the leader region and coverage by monosomes versus polysomes. Some transcripts were hardly translated, others mainly carried monosomes, showed ribosome accumulation in leader regions and most likely represent non-coding RNAs. A similar process was visible for a subset of lytic genes including the key transactivators BZLF1 and BRLF1 in cells infected with weakly replicating EBV strains. This suggests that ribosome trapping, particularly in the leader region, represents a new checkpoint for the repression of lytic replication. We could identify 25 upstream open reading frames (uORFs) located upstream of coding transcripts that displayed 5' leader ribosome trapping, six of which were located in the leader region shared by many latent transcripts. These uORFs repressed viral translation and are likely to play an important role in the regulation of EBV translation.

Collins Center Update. Volume 14, Issue 4, July-September 2012

DTIC Science & Technology

2012-09-01

Strategic Leader Staff Ride Program 2012 • Initiation of “Quick-Turn” Wargame Concept • Combating Terrorism Seminar at the Romanian National Defense...ians, and resident students aid in communicating cur- rent Army issues to these prominent leaders in Amer- ica. Tufts University’s Fletcher School...of Law and Diplo- macy kicked off the 2012 season in early April with 22 partici- pating graduate students enrolled in the International Security

LTG Timothy J. Maude: Leader of Change

DTIC Science & Technology

2005-03-18

Reserve, and National Guard - was seriously in question. Army recruiters were struggling to attract sufficient numbers of quality men and women , and...sufficient numbers of quality men and women , and current recruiting initiatives were increasingly ineffective.’• 7 Former Secretary of the Army Louis... number . 1. REPORT DATE 3. DATES COVERED 18 MAR 2005 2. REPORT TYPE 4. TITLE AND SUBTITLE 5a. CONTRACT NUMBER LTG Timothy J. Maude Leader of Change 5b

Leadership for Student Learning: Restructuring School District Leadership. School Leadership for the 21st Century Initiative: A Report of the Task Force on School District Leadership.

ERIC Educational Resources Information Center

Institute for Educational Leadership, Washington, DC.

This report displays the themes and concerns that worried a cross-section of carefully selected educators and leaders in government, business, and civic groups. While failing to agree completely on the nature of the problems or their solutions, Task Force members were in accord on two conclusions: that district leaders must focus on the goal of…

34 CFR 645.12 - What services may regular Upward Bound and Upward Bound Math-Science projects provide?

Code of Federal Regulations, 2014 CFR

2014-07-01

... 34 Education 3 2014-07-01 2014-07-01 false What services may regular Upward Bound and Upward Bound Math-Science projects provide? 645.12 Section 645.12 Education Regulations of the Offices of the... services may regular Upward Bound and Upward Bound Math-Science projects provide? Any project assisted...

34 CFR 645.12 - What services may regular Upward Bound and Upward Bound Math-Science projects provide?

Code of Federal Regulations, 2011 CFR

2011-07-01

... 34 Education 3 2011-07-01 2011-07-01 false What services may regular Upward Bound and Upward Bound Math-Science projects provide? 645.12 Section 645.12 Education Regulations of the Offices of the... services may regular Upward Bound and Upward Bound Math-Science projects provide? Any project assisted...

34 CFR 645.12 - What services may regular Upward Bound and Upward Bound Math-Science projects provide?

Code of Federal Regulations, 2013 CFR

2013-07-01

... 34 Education 3 2013-07-01 2013-07-01 false What services may regular Upward Bound and Upward Bound Math-Science projects provide? 645.12 Section 645.12 Education Regulations of the Offices of the... services may regular Upward Bound and Upward Bound Math-Science projects provide? Any project assisted...

34 CFR 645.12 - What services may regular Upward Bound and Upward Bound Math-Science projects provide?

Code of Federal Regulations, 2012 CFR

2012-07-01

... 34 Education 3 2012-07-01 2012-07-01 false What services may regular Upward Bound and Upward Bound Math-Science projects provide? 645.12 Section 645.12 Education Regulations of the Offices of the... services may regular Upward Bound and Upward Bound Math-Science projects provide? Any project assisted...

Engaging religious leaders to support HIV prevention and care for gays, bisexual men, and other men who have sex with men in coastal Kenya

PubMed Central

Gichuru, Evans; Kombo, Bernadette; Mumba, Noni; Sariola, Salla; Sanders, Eduard J.; van der Elst, Elise M.

2018-01-01

Abstract In Kenyan communities, religious leaders are important gatekeepers in matters of health and public morality. In a context that is generally homophobic, religious leaders may aggravate or reduce stigmatization of sexual minorities such as gay and bisexual men, and other men who have sex with men (GBMSM). Literature indicates mixed results in efforts to encourage religious leaders to work effectively and sensitively with issues regarding HIV and sexuality. This paper describes the implementation of an engagement intervention with religious leaders from different denominations, which took place following a homophobic hate attack that was led by local religious leaders, at an HIV research clinic for GBMSM on the Kenyan coast. After the homophobic attack, tailored engagement activities, including a comprehensive four-day online sensitivity training course took place between June 2015 and October 2016 in the Kenyan coast. HIV researchers, together with trained GBMSM activists, organized the series of engagement activities for religious leaders which unfolded iteratively, with each subsequent activity informed by the results of the previous one. Facilitated conversations were used to explore differences and disagreements in relation to questions of scripture, mission, HIV, and human sexuality. As a result, researchers noted that many religious leaders, who initially expressed exceedingly negative attitudes towards GBMSM, started to express far more accepting and supportive views of sexuality, sexual identities, and same-sex relations. This paper describes the changes in religious leaders’ discourses relating to GBMSM, and highlights the possibility of using engagement interventions to build trust between research institutes, religious leaders, and GBMSM. PMID:29770367

Triggered lightning spectroscopy: Part 1. A qualitative analysis

NASA Astrophysics Data System (ADS)

Walker, T. Daniel; Christian, Hugh J.

2017-08-01

The first high-speed spectra of triggered lightning have been obtained. During the summers of 2012 and 2013, spectra were recorded at the International Center for Lightning Research and Testing, Camp Blanding, FL. The spectra were recorded with a high-speed camera with a grism mounted in front of it. The triggered lightning channels observed were generally at low altitude in a region that included the copper wire. Spectral emissions were recorded at each phase: the initial stage, dart leader, return stroke, and continuing current. These spectra are separated into two major regions: soft ultraviolet to visible (3800-6200 Å) and visible to near infrared (6200-8700 Å). The emissions during the initial stage reflect those of a copper wire burn in air. The majority of the emissions are neutral copper. After the initial stage comes the first return stroke which contains no detected molecular emissions; however, it does contain neutral, singly, and doubly ionized nitrogen and oxygen, neutral argon, and neutral hydrogen. Occasionally, before a return stroke, the dart leader coming down the channel will be stepped. During these occasions the leader spectra resemble that of the return stroke but are dimmer and shorter lived. After the initial portion of the return stroke, there are often changes in the luminosity of the spectrum which corresponds with fluctuations in the continuing current. During these "reillumination phases" no singly or doubly ionized lines have been observed to reemerge over the detection threshold, only neutral emission features.

Runaway breakdown and hydrometeors in lightning initiation.

PubMed

Gurevich, A V; Karashtin, A N

2013-05-03

The particular electric pulse discharges are observed in thunderclouds during the initiation stage of negative cloud-to-ground lightning. The discharges are quite different from conventional streamers or leaders. A detailed analysis reveals that the shape of the pulses is determined by the runaway breakdown of air in the thundercloud electric field initiated by extensive atmospheric showers (RB-EAS). The high amplitude of the pulse electric current is due to the multiple microdischarges at hydrometeors stimulated and synchronized by the low-energy electrons generated in the RB-EAS process. The series of specific pulse discharges leads to charge reset from hydrometeors to the free ions and creates numerous stretched ion clusters, both positive and negative. As a result, a wide region in the thundercloud with a sufficiently high fractal ion conductivity is formed. The charge transport by ions plays a decisive role in the lightning leader preconditioning.

Preserving Staffing Resources As a System: Nurses Leading Operations and Efficiency Initiatives.

PubMed

Hill, Karen S; Higdon, Karen; Porter, Bernard W; Rutland, Michael D; Vela, Donna K

2015-01-01

Nurse leaders have struggled for generations with using the right staff in appropriate roles and numbers to optimally cover patient care services and yet preserve salary dollars when possible. The Baptist Health system identified opportunities to enhance communication across facilities and encouraged executives and department leaders to work together to achieve common goals of efficiency and quality. Baptist Health created an operations and efficiency council with representation from each of the seven hospitals in the system, as well as corporate leaders and support staff. Beginning in April 2014, the system began consistently exceeding productivity targets and effectively eliminated a $30 million dollar salary variance from the spring of 2013.

Correlated observations of three triggered lightning flashes

NASA Technical Reports Server (NTRS)

Idone, V. P.; Orville, R. E.; Hubert, P.; Barret, L.; Eybert-Berard, A.

1984-01-01

Three triggered lightning flashes, initiated during the Thunderstorm Research International Program (1981) at Langmuir Laboratory, New Mexico, are examined on the basis of three-dimensional return stroke propagation speeds and peak currents. Nonlinear relationships result between return stroke propagation speed and stroke peak current for 56 strokes, and between return stroke propagation speed and dart leader propagation speed for 32 strokes. Calculated linear correlation coefficients include dart leader propagation speed and ensuing return stroke peak current (32 strokes; r = 0.84); and stroke peak current and interstroke interval (69 strokes; r = 0.57). Earlier natural lightning data do not concur with the weak positive correlation between dart leader propagation speed and interstroke interval. Therefore, application of triggered lightning results to natural lightning phenomena must be made with certain caveats. Mean values are included for the three-dimensional return stroke propagation speed and for the three-dimensional dart leader propagation speed.

The emergence of precision therapeutics: New challenges and opportunities for Canada's health leaders.

PubMed

Slater, Jim; Shields, Laura; Racette, Ray J; Juzwishin, Donald; Coppes, Max

2015-11-01

In the era of personalized and precision medicine, the approach to healthcare is quickly changing. Genetic and other molecular information are being increasingly demanded by clinicians and expected by patients for prevention, screening, diagnosis, prognosis, health promotion, and treatment of an increasing number of conditions. As a result of these developments, Canadian health leaders must understand and be prepared to lead the necessary changes associated with these disruptive technologies. This article focuses on precision therapeutics but also provides background on the concepts and terminology related to personalized and precision medicine and explores Canadian health leadership and system issues that may pose barriers to their implementation. The article is intended to inspire, educate, and mobilize Canadian health leaders to initiate dialogue around the transformative changes necessary to ready the healthcare system to realize the benefits of precision therapeutics. © 2015 Collège canadien des leaders en santé

Team Leader Structuring for Team Effectiveness and Team Learning in Command-and-Control Teams.

PubMed

van der Haar, Selma; Koeslag-Kreunen, Mieke; Euwe, Eline; Segers, Mien

2017-04-01

Due to their crucial and highly consequential task, it is of utmost importance to understand the levers leading to effectiveness of multidisciplinary emergency management command-and-control (EMCC) teams. We argue that the formal EMCC team leader needs to initiate structure in the team meetings to support organizing the work as well as facilitate team learning, especially the team learning process of constructive conflict. In a sample of 17 EMCC teams performing a realistic EMCC exercise, including one or two team meetings (28 in sum), we coded the team leader's verbal structuring behaviors (1,704 events), rated constructive conflict by external experts, and rated team effectiveness by field experts. Results show that leaders of effective teams use structuring behaviors more often (except asking procedural questions) but decreasingly over time. They support constructive conflict by clarifying and by making summaries that conclude in a command or decision in a decreasing frequency over time.

Measurement of low-frequency magnetic pulses from negative stepped leaders in rocket-triggered lightning flashes

NASA Astrophysics Data System (ADS)

Lu, Gaopeng

2017-04-01

Measurement of low-frequency magnetic pulses from negative stepped leaders in rocket-triggered lightning flashes Gaopeng Lu,1,2 Yanfeng Fan,1,3 Hongbo Zhang,1,3 Rubin Jiang,1,2 Mingyuan Liu,1,2 and Xiushu Qie,1,2 1. Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China 2. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China 3. University of Chinese Academy of Sciences, Beijing 100049, China We report the measurement of magnetic pulses from the negative stepped leaders in positive rocket-triggered lightning flashes with the low-frequency (4 kHz to 420 kHz) magnetic sensor at two different distances (78 m and 970 m, respectively) during the SHantong Artificial Triggered Lightning Experiments (SHATLE) during summer of 2015. Different from the magnetic radiation from positive leaders as observed in the considerably more frequent cases, the impulsive signals from the negative leader sustain for a much longer time interval, while the attenuation of current pulse launched by the stepping of leader is also observed. The general pattern of magnetic pulses observed for the negative stepped leader is different from the positive counterpart. Also, the initial negative leader appears to be brighter than the positive ones, as shown by both high-speed video observation and the magnetic measurement.

The BHEF National Higher Education and Workforce Initiative: A Model for Pathways to Baccalaureate Attainment and High-Skill Careers in Emerging Fields, Part 3

ERIC Educational Resources Information Center

Fitzgerald, Brian K.; Barkanic, Steve; Cárdenas-Navia, Isabel; Chen, Janet; Elzey, Karen; Hughes, Debbie; Troyan, Danielle

2016-01-01

BHEF has achieved particular success in operationalizing its National Higher Education and Workforce Initiative (HEWI) through regional initiatives in data science and analytics (DSA). Leveraging its membership of corporate CEOs, university presidents and government agency leaders, BHEF seeded new undergraduate pathways in DSA at Case Western…

A Descriptive Analysis of State-Supported Formative Assessment Initiatives in New York and Vermont. Summary. Issues & Answers. REL 2012-No. 112

ERIC Educational Resources Information Center

Louie, Josephine; Sanchez, Maria Teresa; North, Charlotte; Cazabon, Mary; Melo, Daniel; Kagle, Melissa

2011-01-01

This study examines two state-supported formative assessment initiatives that promote a consensus definition of formative assessment endorsed by the Council of Chief State School Officers. It describes the primary components of the two initiatives and the strategies that state, district, and school leaders report using to support implementation of…

A Descriptive Analysis of State-Supported Formative Assessment Initiatives in New York and Vermont. Issues & Answers. REL 2012-No. 112

ERIC Educational Resources Information Center

Louie, Josephine; Sanchez, Maria Teresa; North, Charlotte; Cazabon, Mary; Melo, Daniel; Kagle, Melissa

2011-01-01

This study examines two state-supported formative assessment initiatives that promote a consensus definition of formative assessment endorsed by the Council of Chief State School Officers. It describes the primary components of the two initiatives and the strategies that state, district, and school leaders report using to support implementation of…

Latino Initiatives: Progress and Challenges. A Report by the Administration of Mayor David N. Dinkins.

ERIC Educational Resources Information Center

Medina, Adelita M.

This annual report for 1990 details initiatives by a select group of New York City (New York) agencies on matters of particular concern to Latinos. New York City's mayor, David Dinkins, originally presented these initiatives in August of 1990 to a meeting of Latino leaders representing diverse agencies and community organization. Highlights of…

Philanthropy as a source of funding for nursing initiatives.

PubMed

Kleinpell, Ruth M; Start, Rachel; McIntosh, Erik; Worobec, Sophia; Llewellyn, Jane

2014-01-01

Nurse leaders are challenged with ensuring that research and evidence-based practices are being integrated into clinical care. Initiatives such as the Magnet Recognition Program have helped reinforce the importance of advancing nursing practices to integrate best practices, conduct quality improvement initiatives, improve performance metrics, and involve bedside nurses in conducting research and evidence-based practice projects. While seeking research funding is an option for some initiatives, other strategies such as seeking funding from grateful patients or from philanthropic resources are becoming important options for nurse leaders to pursue, as the availability of funding from traditional sources such as professional organizations or federal funding becomes more limited. In addition, more institutions are seeking and applying for funding, increasing the pool of candidates who are vying for existing funding. Seeking alternative sources of funding, such as through philanthropy, becomes a viable option. This article reviews important considerations in seeking funding from philanthropic sources for nursing initiatives. Examples from a multiyear project that focused on promoting a healthy work environment and improving nursing morale are used to highlight strategies that were used to solicit, obtain, and secure extension funding from private foundation funding to support the initiative.

Spatio-temporal dynamics of brain mechanisms in aversive classical conditioning: high-density event-related potential and brain electrical tomography analyses.

PubMed

Pizzagalli, Diego A; Greischar, Lawrence L; Davidson, Richard J

2003-01-01

Social cognition, including complex social judgments and attitudes, is shaped by individual learning experiences, where affect often plays a critical role. Aversive classical conditioning-a form of associative learning involving a relationship between a neutral event (conditioned stimulus, CS) and an aversive event (unconditioned stimulus, US)-represents a well-controlled paradigm to study how the acquisition of socially relevant knowledge influences behavior and the brain. Unraveling the temporal unfolding of brain mechanisms involved appears critical for an initial understanding about how social cognition operates. Here, 128-channel ERPs were recorded in 50 subjects during the acquisition phase of a differential aversive classical conditioning paradigm. The CS+ (two fearful faces) were paired 50% of the time with an aversive noise (CS upward arrow + /Paired), whereas in the remaining 50% they were not (CS upward arrow + /Unpaired); the CS- (two different fearful faces) were never paired with the noise. Scalp ERP analyses revealed differences between CS upward arrow + /Unpaired and CS- as early as approximately 120 ms post-stimulus. Tomographic source localization analyses revealed early activation modulated by the CS+ in the ventral visual pathway (e.g. fusiform gyrus, approximately 120 ms), right middle frontal gyrus (approximately 176 ms), and precuneus (approximately 240 ms). At approximately 120 ms, the CS- elicited increased activation in the left insula and left middle frontal gyrus. These findings not only confirm a critical role of prefrontal, insular, and precuneus regions in aversive conditioning, but they also suggest that biologically and socially salient information modulates activation at early stages of the information processing flow, and thus furnish initial insight about how affect and social judgments operate.

Are We Serious about Preparing Chemists for the 21st Century Workplace or Are We Just Teaching Chemistry?

NASA Astrophysics Data System (ADS)

Kerr, Sylvia; Runquist, Olaf

2005-02-01

What characteristics of employees do you value in the workplace? Sixteen leaders from world-class chemistry-based industries responded: "We want competent scientists who have high-level communication skills, cultural competencies, knowledge of how for-profit organizations function, excellent team problem-solving skills, broad backgrounds, strong work ethics, the ability to move effortlessly from science to business to humanitarian issues, and data-analysis skills." A wish list of 16 valued characteristics was generated. In response to the concern of industrial leaders and as a result of a National Science Foundation grant the Hamline University 3M Project was initiated. This unique project brought 3M professionals and Hamline University faculty members together in teams to address the concerns of industry leaders and to design and initiate curricular changes to better prepare students for the 21st century technological workplace. Each of five teams focused on one of five skill areas: namely, communications, team problem solving, data analysis, cultural competency, business, and economics. The Hamline 3M Project demonstrated a model for utilizing the industrial intellectual community to enhance undergraduate science education.

Emergence of Leadership within a Homogeneous Group

PubMed Central

Eskridge, Brent E.; Valle, Elizabeth; Schlupp, Ingo

2015-01-01

Large scale coordination without dominant, consistent leadership is frequent in nature. How individuals emerge from within the group as leaders, however transitory this position may be, has become an increasingly common question asked. This question is further complicated by the fact that in many of these aggregations, differences between individuals are minor and the group is largely considered to be homogeneous. In the simulations presented here, we investigate the emergence of leadership in the extreme situation in which all individuals are initially identical. Using a mathematical model developed using observations of natural systems, we show that the addition of a simple concept of leadership tendencies which is inspired by observations of natural systems and is affected by experience can produce distinct leaders and followers using a nonlinear feedback loop. Most importantly, our results show that small differences in experience can promote the rapid emergence of stable roles for leaders and followers. Our findings have implications for our understanding of adaptive behaviors in initially homogeneous groups, the role experience can play in shaping leadership tendencies, and the use of self-assessment in adapting behavior and, ultimately, self-role-assignment. PMID:26226381

Emergence of Leadership within a Homogeneous Group.

PubMed

Eskridge, Brent E; Valle, Elizabeth; Schlupp, Ingo

2015-01-01

Large scale coordination without dominant, consistent leadership is frequent in nature. How individuals emerge from within the group as leaders, however transitory this position may be, has become an increasingly common question asked. This question is further complicated by the fact that in many of these aggregations, differences between individuals are minor and the group is largely considered to be homogeneous. In the simulations presented here, we investigate the emergence of leadership in the extreme situation in which all individuals are initially identical. Using a mathematical model developed using observations of natural systems, we show that the addition of a simple concept of leadership tendencies which is inspired by observations of natural systems and is affected by experience can produce distinct leaders and followers using a nonlinear feedback loop. Most importantly, our results show that small differences in experience can promote the rapid emergence of stable roles for leaders and followers. Our findings have implications for our understanding of adaptive behaviors in initially homogeneous groups, the role experience can play in shaping leadership tendencies, and the use of self-assessment in adapting behavior and, ultimately, self-role-assignment.

A drowned lycopsid forest above the Mahoning coal (Conemaugh Group, Upper Pennsylvanian) in eastern Ohio, U.S.A

USGS Publications Warehouse

DiMichele, W.A.; Eble, C.F.; Chaney, D.S.

1996-01-01

Over 800 mud-filled casts of upright lycopsid tree stumps have been documented immediately above the Mahoning coal in an active underground mine located in northwestern Jefferson County, Ohio. The coal body originated as a pod-shaped peat body of ??? 60 km2. Trees are rooted at several levels within a thin (15-40 cm) bone coal directly above the banded coal; they extend upward up to 15 cm into overlying, flat-bedded, carbonaceous mudstones that coarsen up. From a maximum basal diameter of 1.2 m, stumps taper upward to diameters no less than 0.3 m. Within single-entry transects, < 6 m wide that total 2585 m in length, stumps are randomly distributed. The trees are identified as lepidodendrids on the basis of gross morphology, external stem patterns, and attached stigmarian root systems, and provisionally as Lepidophloios or Lepidodendron by associated palynology of the enclosing matrix. Palynological analyses of incremental seam samples indicate an initial dominance of lycopsid spores with lepidodendracean affinities (Lycospora granulata from Lepidophloios hallii), replaced upwards by tree-fern spores, with a reoccurrence of lepidodendracean spores in the upper benches; spores of Sigillaria (Crassispora) are abundant only at the base of the coal. Petrographic analyses indicate a parallel trend from vitrinite-rich to inertinite- and liptinite-rich upward in the coal body. All data indicate that the peat represented by the Mahoning coal was drowned slowly. During the earliest stages of inundation, a lycopsid forest was re-established, only to be subsequently drowned.

ISUAL-Observed Blue Luminous Events: The Associated Sferics

NASA Astrophysics Data System (ADS)

Chou, Jung-Kuang; Hsu, Rue-Ron; Su, Han-Tzong; Chen, Alfred Bing-Chih; Kuo, Cheng-Ling; Huang, Sung-Ming; Chang, Shu-Chun; Peng, Kang-Ming; Wu, Yen-Jung

2018-04-01

The blue luminous events (BLEs) recorded by ISUAL (Imager of Sprites and Upper Atmospheric Lightning) radiate unambiguous middle ultraviolet to blue emissions (230-450 nm) but contain dim red emissions (623-754 nm). The BLE appears to be dot-like on one ISUAL image with an integration time of 29 ms. A few BLEs develop upward into blue jets/starters or type II gigantic jets (GJs). The associated sferics of the BLEs in the extremely low frequency to very low frequency band and in the low-frequency band exhibit similar patterns to the narrow bipolar events (NBEs) identified in the very low frequency and low-frequency band. The ISUAL BLEs are conjectured to be the accompanied light emissions of the NBEs. Both upward and downward propagating current obtained from the associated sferics of the BLEs have been found. The source heights of the six BLEs related to negative NBEs are estimated in the range of 16.2-17.8 km. These six events are suggested to occur between the upper positive charge layer and the negative screen charge layer on the top of the normally electrified thunderstorm. The six blue starters, one blue jet, and one type II GJ are inferred to be positive upward discharges from their associated sferics in the extremely low frequency to very low frequency band. Based on the simultaneous radio and optical observations, a NBE is conjectured to be the initiation discharge with rapidly flowing current within the thunderstorm, while a blue jet/starter or a type II GJ is suggested to be the ensuing discharge with slowly varying current propagating upward from the thunderstorm.

On the critical charge required for positive leader inception in long air gaps

NASA Astrophysics Data System (ADS)

Liu, Lipeng; Becerra, Marley

2018-01-01

The amount of the electric charge injected by the streamer corona bursts during the stage of leader inception determines the energy deposited to thermalize the corona stem into a leader segment. This paper is aimed at investigating the critical charge required for positive leader inception in air by using a thermo-hydrodynamic model with a detailed kinetic scheme. In order to simplify the analysis and to speed up the simulation, a reduced kinetic scheme for air is proposed. Numerical comparisons show that the reduced scheme can obtain almost the same results as the previous comprehensive kinetic scheme but with only half of the number of species and reactions. The thermo-hydrodynamic model with the reduced kinetics is then used to solve the radial dynamics of a single stem heated by current pulses typical of streamer corona bursts. The critical charge necessary for the direct transition of a first streamer corona into a leader under electrodes with large curvature radius is estimated between 0.08 and 0.5 µC per stem. Furthermore, the simulation shows that the gas heating of corona stem formed from electrodes with small curvature radius is mainly determined by the total accumulated charge injected by previous streamer corona bursts and the length of the dark periods in between the current pulses. The shape and the number of the corona current pulses in the discharge also play a role and their effects are discussed. It is suggested that the transition into a leader is triggered when a secondary streamer burst is initiated after the gas temperature is increased by the heating of previous streamers to about 1200 K. In addition, it is found that the heating produced by the charge injected by previous streamer corona bursts can be neglected if the dark period to the next burst is larger than few hundreds of µs for a corona stem with moderate initial stem radius. This indicates that the critical charge criterion obtained from laboratory experiments does not hold to evaluate the inception of positive leaders under conditions when long dark periods are present.

Leader development transformation in the Army Nurse Corps.

PubMed

Funari, Tamara S; Ford, Kathleen; Schoneboom, Bruce A

2011-01-01

The Army Nurse (AN) Corps is undergoing a historic transformation. Under the leadership of its Chief, MG Patricia Horoho, the Corps developed and implemented the AN Campaign Plan to insure that the Corps has the right capability and capacity to meet the current and future needs of the US Army. This article describes the work conducted by the AN Corps Leadership Imperative Action Team (Leader IAT) to develop full-spectrum leaders for the future. The mission of the Leader IAT is derived from both the AN Campaign plan as well as the operational objectives defined in the AN balanced scorecard. As a result of the analysis conducted during preparation of the AN Campaign Plan, several key gaps were identified regarding the Army Nurse Corps' ability to match leadership talents with the diverse demands of current missions, as well as its adaptability and flexibility to be prepared for unknown future missions. This article also introduces the Leadership Capability Map and other initiatives implemented to ensure the development of full-spectrum leaders who will be effective in the future military healthcare environment.

Black Male Retention Initiatives: Exploring Students' Experiences and Program Effectiveness at Predominantly White Institutions

ERIC Educational Resources Information Center

St. Leger, Gabrielle

2012-01-01

Recent initiatives in higher education have been designed to increase Black undergraduate male collegiate retention and persistence through graduation for this historically underrepresented population. Although institutional leaders in higher education have focused on creating more inclusive campuses, designing and implementing programs to retain…

Bringing Out the Stories: Lessons about Engagement.

ERIC Educational Resources Information Center

Benham, Magaret K. P.

2002-01-01

As part of the W. K. Kellogg Foundation's initiative to help tribal colleges build stronger American Indian communities, a cluster of Native scholars/writers disseminated the knowledge gained through presentations, a book, and the stories in this journal. The initiative demonstrated that with mentoring, emerging Native leaders will continue…

Chiefs & Visionaries: AIHEC Molds Leadership Initiative To Match Tribal Values.

ERIC Educational Resources Information Center

Gipp, Gerald

2003-01-01

Compares and contrasts Native American and western leadership perspectives, underscoring the need to develop tribal college leaders capable of guiding institutions using traditional Native values and beliefs. Highlights a W.K. Kellogg Foundation initiative focused on developing and enhancing the leadership capacity of the Indian country. (RC)

Thinking Broadly: Financing Strategies for Comprehensive Child and Family Initiatives.

ERIC Educational Resources Information Center

Hayes, Cheryl D.

In the current tight fiscal environment, it is critical for state and community leaders to think broadly and systematically about how to finance important education, family, and child services, and community development initiatives. This guide presents a conceptual framework for financing child and family services and community building and…

Educational Technology: Effective Leadership and Current Initiatives

ERIC Educational Resources Information Center

Courville, Keith

2011-01-01

(Purpose) This article describes the basis for effective educational technology leadership and a few of the current initiatives and impacts that are a result of the aforementioned effective leadership. (Findings) Topics addressed in this paper include: (1) the role of the educational technology leader in an educational setting; (2) an examination…

Playthings and Equipment that Encourage Child Initiated Play

ERIC Educational Resources Information Center

Hudson, Susan D.

2005-01-01

This article deals with playthings and equipment that encourage child initiated play. Physical objects refer to concrete items within the play setting, such as balls, bats, craft supplies, playground equipment, musical instruments, and so forth. Social objects are other people, such as leaders, friends, teachers, and other participants. People are…

Initiative Overview & Summary of Research

ERIC Educational Resources Information Center

Education Funders Research Initiative, 2013

2013-01-01

Education Funders Research Initiative (EdFunders), a project of Philanthropy New York, is supported by a group of diverse funding organizations that have pursued an array of education reform strategies. EdFunders have come together to engage New Yorkers and focus leaders on new research into how to best prepare students for college and…

75 FR 64731 - Request for Information (RFI) for Consumer Health Initiative To Develop Collaborations That...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-20

... Initiative To Develop Collaborations That Produce Evidence-Based Informatics Resources and Products\\1\\ \\1..., Collaboration, & Quality was convened. This federally sponsored summit aimed to: (1) Convene leaders across... service, and (3) foster collaborations to integrate evidence- based commercial and non-commercial products...

Want to Change the World? Here's How

ERIC Educational Resources Information Center

Mangan, Katherine

2009-01-01

About 1,000 students from 50 states and 60 countries attended the second annual Clinton Global Initiative University. The project, an outgrowth of the Clinton Global Initiative for world leaders, challenges participants to take "good intentions and turn them into measurable changes in other people's lives" by submitting detailed…

Multi-Dimensional Assessment of Professional Competence during Initial Pilot Training

ERIC Educational Resources Information Center

Larson, Douglas Andrew

2017-01-01

A twenty-year forecast predicting significant increases in global air transportation portends a need to increase the capacity and effectiveness of initial pilot training. In addition to quantitative concerns related to the supply of new pilots, industry leaders have expressed dissatisfaction with the qualitative output of current aviation training…

Doing School Choice Right: Preliminary Findings

ERIC Educational Resources Information Center

Harvey, James; Hill, Paul T.

2006-01-01

The Center on Reinventing Public Education (CRPE) has launched a new initiative entitled "Doing School Choice Right." Funded by the Bill and Melinda Gates, Annie E. Casey, and Lynde and Harry Bradley Foundations, the initiative's goal is to help state and local leaders handle practical issues whose resolution can determine whether school…

Prevention and rehabilitation in Swedish public sector workplaces: Effects on co-workers' and leaders' health and psychosocial working conditions.

PubMed

Vinberg, Stig; Romild, Ulla; Landstad, Bodil J

2015-01-01

Leaders and co-workers in Swedish public sector organizations are exposed to demanding psychosocial working conditions; more knowledge about workplace-based interventions in this sector of working life is needed. To compare co-workers' and leaders' self-ratings of health and psychosocial working conditions, and investigate how prevention and rehabilitation in Swedish public sector workplaces affects these ratings. The longitudinal panel data consisted of 311 individuals (20 leaders, 291 co-workers) at 19 workplaces. Based on questionnaire data, statistical analyses were performed using Mann-Whitney U-Test, pair-wise Spearman correlations, a mixed between-within subjects ANOVA and Friedman's test. Results indicate differences in how the leaders and the co-workers judge their health and psychosocial working conditions. Leaders report work content that is more varied and interesting as well as more possibilities for personal development through work, yet they also report more tiredness, concern over managing their work situation and time pressure at work. Comparisons of mean values for used indicators show some improvements after one year, but also several non-significant or negative time trends two years after the interventions were initiated. The study provides some support for experienced differences between co-workers' and leaders' health and psychosocial working conditions in public sector workplaces, indicating the importance of different workplace-oriented prevention and rehabilitation interventions for these two categories of employees.

TALK NERDY TO ME: THE ROLE OF INTELLECTUAL STIMULATION IN THE SUPERVISOR-EMPLOYEE RELATIONSHIP.

PubMed

Smothers, Jack; Doleh, Randa; Celuch, Kevin; Peluchette, Joy; Valadares, Kevin

2016-01-01

This study investigates (1) if communication with one's supervisor is related to empowerment through establishing perceptions of leader integrity, and (2) the extent to which the relationship between leader integrity and empowerment is moderated by intellectual stimulation. Due to the dynamic nature of today's organizational environment, understanding the nuances among these variables is vital to effective performance at the individual and organizational level. Hierarchical multiple regression tests were performed with a sample of 259 nurses in two regional healthcare facilities in the Midwestern United States. The results support a moderated-mediation relationship such that open communication with one's supervisor is positively related to empowerment through perceptions of leader integrity, but the relationship between leader integrity and empowerment varies across levels of intellectual stimulation. Specifically, while supervisor integrity mediates the relationship between patient safety communication and empowerment, this mediated relationship is only significant for followers who experience high intellectual stimulation, and is not significant for followers who report low intellectual stimulation. Thus, open communication and leader integrity will only empower followers if the leader is intellectually stimulating. This research clarifies how leaders in health care environments should communicate with their followers to empower them to think and act by their own initiative. Specifically, followers who communicate openly with their supervisor will feel more empowered, but only if they experience high intellectual stimulation which can improve their job performance and patient safety overall.

34 CFR 645.1 - What is the Upward Bound Program?

Code of Federal Regulations, 2013 CFR

2013-07-01

... the following three types of projects: (1) Regular Upward Bound projects. (2) Upward Bound Math and Science Centers. (3) Veterans Upward Bound projects. (Authority: 20 U.S.C. 1070a-11 and 1070a-13) ...) The Upward Bound Program provides Federal grants to projects designed to generate in program...

34 CFR 645.1 - What is the Upward Bound Program?

Code of Federal Regulations, 2014 CFR

2014-07-01

... the following three types of projects: (1) Regular Upward Bound projects. (2) Upward Bound Math and Science Centers. (3) Veterans Upward Bound projects. (Authority: 20 U.S.C. 1070a-11 and 1070a-13) ...) The Upward Bound Program provides Federal grants to projects designed to generate in program...

34 CFR 645.42 - What are Upward Bound stipends?

Code of Federal Regulations, 2012 CFR

2012-07-01

... grantee is permitted to provide: (1) For Regular Upward Bound projects and Upward Bound Math and Science... What are Upward Bound stipends? (a) An Upward Bound project may provide stipends for all participants... evidence of satisfactory participation in activities of the project including— (1) Regular attendance; and...

34 CFR 645.42 - What are Upward Bound stipends?

Code of Federal Regulations, 2013 CFR

2013-07-01

... grantee is permitted to provide: (1) For Regular Upward Bound projects and Upward Bound Math and Science... What are Upward Bound stipends? (a) An Upward Bound project may provide stipends for all participants... evidence of satisfactory participation in activities of the project including— (1) Regular attendance; and...

34 CFR 645.42 - What are Upward Bound stipends?

Code of Federal Regulations, 2014 CFR

2014-07-01

... grantee is permitted to provide: (1) For Regular Upward Bound projects and Upward Bound Math and Science... What are Upward Bound stipends? (a) An Upward Bound project may provide stipends for all participants... evidence of satisfactory participation in activities of the project including— (1) Regular attendance; and...

34 CFR 645.1 - What is the Upward Bound Program?

Code of Federal Regulations, 2012 CFR

2012-07-01

... the following three types of projects: (1) Regular Upward Bound projects. (2) Upward Bound Math and Science Centers. (3) Veterans Upward Bound projects. (Authority: 20 U.S.C. 1070a-11 and 1070a-13) ...) The Upward Bound Program provides Federal grants to projects designed to generate in program...

34 CFR 645.1 - What is the Upward Bound Program?

Code of Federal Regulations, 2011 CFR

2011-07-01

... the following three types of projects: (1) Regular Upward Bound projects. (2) Upward Bound Math and Science Centers. (3) Veterans Upward Bound projects. (Authority: 20 U.S.C. 1070a-11 and 1070a-13) ...) The Upward Bound Program provides Federal grants to projects designed to generate in program...

Insights from an Evaluability Assessment of the U.S. Forest Service "More Kids in the Woods" Initiative

ERIC Educational Resources Information Center

Zint, Michaela T.; Covitt, Beth A.; Dowd, Patrick F.

2011-01-01

We conducted an evaluability assessment of the U.S. Forest Service's "More Kids in the Woods" internal grant initiative based on a review of 26 funded proposals, the creation of logic models, and a survey of project leaders. Evaluations of the initiative are warranted because it has clear outcome objectives, is implemented as intended, and results…

Preparing for Evaluation: Lessons from the Evaluability Assessment of the Teagle Foundation's College-Community Connections Initiative. Report

ERIC Educational Resources Information Center

Black, Kristin

2016-01-01

Funders, policymakers, and program leaders recognize the value of high-quality evidence. To make good use of a program evaluation, initiatives must contend with a set of fundamental questions first. Some of these are about the initiative itself: What outcomes does it seek to affect? Are daily activities in line with long-term goals? Others are…

The paradox of pharmacy: A profession's house divided.

PubMed

Brown, Daniel

2012-01-01

To describe the paradox in pharmacy between the vision of patient care and the reality of community pharmacy practice and to explore how integrated reimbursement for the retail prescription and linking cognitive patient care services directly to prescription processing could benefit the profession. A dichotomy exists between what many pharmacists do and what they've been trained to do. Pharmacy leaders have formulated a vision for pharmacists to become more involved in direct patient care. All graduates now receive PharmD-level training, and some leaders call for requirements of postgraduate residency training and board certification for pharmacists who provide patient care. How such requirements would relate to community pharmacy practice is unclear. The retail prescription remains the primary link between the pharmacist and the health care consumer. Cognitive services, such as medication therapy management (MTM), need to be integrated into the standard workflow of community pharmacies so as to become a natural extension of the professional services rendered in the process of filling a prescription. Current prescription fees are not sufficient to support legitimate professional services. A proposed integrated pricing system for retail prescriptions includes a $15 professional fee that is scaled upward for value-added services, such as MTM. Pharmacy includes a diversity of practice that has historically been a source of division. For pharmacists to reach their potential as patient care providers, the various factions within the profession must forge a unified vision of the future that addresses all realms of practice.

Cancer Research

Cancer.gov

NCI is the nation's leader in cancer research. Learn more about NCI's cancer research areas, key initiatives, progress made in cancer research, and resources for researchers like research tools, specimens and data.

The meta-volition model: organizational leadership is the key ingredient in getting society moving, literally!

PubMed

Yancey, Antronette K

2009-10-01

This paper argues that substantive and sustainable population-wide improvements in physical activity can be achieved only through the large scale adoption and implementation of policies and practices that make being active the default choice and remaining inactive difficult. Meta-volition refers to the volition and collective agency of early adopter leaders who implement such changes in their own organizations to drive productivity and health improvements. Leaders, themselves, are motivated by strong incentives to accomplish their organizational missions. The meta-volition model (MVM) specifies a cascade of changes that may be sparked by structural integration of brief activity bouts into organizational routine across sectors and types of organizations. MVM builds upon inter-disciplinary social ecological change models and frameworks such as diffusion of innovations, social learning and social marketing. MVM is dynamic rather than static, integrating biological influences with psychological factors, and socio-cultural influences with organizational processes. The model proposes six levels of dissemination triggered by organizational marketing to early adopter leaders carried out by "sparkplugs," boisterous leaders in population physical activity promotion: initiating (leader-leader), catalyzing (organizational-individual), viral marketing (individual-organizational), accelerating (organizational-organizational), anchoring (organizational-community) and institutionalizing (community-individual). MVM embodies public-private partnership principles, a collective investment in the high cost of achieving and maintaining active lifestyles.

Approval of System MANPRINT Management Plan (SMMP) for the Modernized Demolitions Initiators (MDI) Set

DTIC Science & Technology

1990-07-01

at the different skill levels are: C-1 a. MOSC 12B10. Assists combat engineers by performing combat construction, combat demolitions, and related...duties. b. MOSC 12B20. Performs as team leader and assistant squad leader in combat construction, demolition, and duties. c. MOSC 12B30. Serves as squad...instructor. d. MOSC 12B40. Serves as platoon sergeant; as operations sergeant; as construction inspector; as advisor to supported units, allied forces

Achieving environmental excellence through a multidisciplinary grassroots movement.

PubMed

Herechuk, Bryan; Gosse, Carolyn; Woods, John N

2010-01-01

St. Joseph's Healthcare Hamilton (SJHH) supports a grassroots green team, called Environmental Vision and Action (EVA). Since the creation of EVA, a healthy balance between corporate projects led by corporate leaders and grassroots initiatives led by informal leaders has resulted in many successful environmental initiatives. Over a relatively short period of time, environmental successes at SJHH have included waste diversion programs, energy efficiency and reduction initiatives, alternative commuting programs, green purchasing practices, clinical and pharmacy greening and increased staff engagement and awareness. Knowledge of social movements theory helped EVA leaders to understand the internal processes of a grassroots movement and helped to guide it. Social movements theory may also have broader applicability in health care by understanding the passionate engagement that people bring to a common cause and how to evolve sources of opposition into engines for positive change. After early successes, as the limitations of a grassroots movement began to surface, the EVA team revived the concept of evolving the grassroots green program into a corporate program for environmental stewardship. It is hard to quantify the importance of allowing our staff, physicians, volunteers and patients to engage in changes that they feel passionately about. However, at SJHH, the transformation of a group of people unsatisfied with the organization's environmental performance into an 'engine for change' has led to a rapid improvement in environmental stewardship at SJHH that is now regarded as a success.

Modeling Stepped Leaders Using a Time Dependent Multi-dipole Model and High-speed Video Data

NASA Astrophysics Data System (ADS)

Karunarathne, S.; Marshall, T.; Stolzenburg, M.; Warner, T. A.; Orville, R. E.

2012-12-01

In summer of 2011, we collected lightning data with 10 stations of electric field change meters (bandwidth of 0.16 Hz - 2.6 MHz) on and around NASA/Kennedy Space Center (KSC) covering nearly 70 km × 100 km area. We also had a high-speed video (HSV) camera recording 50,000 images per second collocated with one of the electric field change meters. In this presentation we describe our use of these data to model the electric field change caused by stepped leaders. Stepped leaders of a cloud to ground lightning flash typically create the initial path for the first return stroke (RS). Most of the time, stepped leaders have multiple complex branches, and one of these branches will create the ground connection for the RS to start. HSV data acquired with a short focal length lens at ranges of 5-25 km from the flash are useful for obtaining the 2-D location of these multiple branches developing at the same time. Using HSV data along with data from the KSC Lightning Detection and Ranging (LDAR2) system and the Cloud to Ground Lightning Surveillance System (CGLSS), the 3D path of a leader may be estimated. Once the path of a stepped leader is obtained, the time dependent multi-dipole model [ Lu, Winn,and Sonnenfeld, JGR 2011] can be used to match the electric field change at various sensor locations. Based on this model, we will present the time-dependent charge distribution along a leader channel and the total charge transfer during the stepped leader phase.

Stratigraphic architecture of a fluvial-lacustrine basin-fill succession at Desolation Canyon, Uinta Basin, Utah: Reference to Walthers’ Law and implications for the petroleum industry

USGS Publications Warehouse

Ford, Grace L.; David R. Pyles,; Dechesne, Marieke

2016-01-01

Two large-scale (member-scale) upward patterns are noted: Waltherian, and non-Waltherian. The upward successions in Waltherian progressions record progradation or retrogradation of a linked fluvial-lacustrine system across the area; whereas the upward successions in non-Waltherian progressions record large-scale changes in the depositional system that are not related to progradation or retrogradation of the ancient lacustrine shoreline. Four Waltherian progressions are noted: 1) the Flagstaff Limestone to lower Wasatch Formation member records the upward transition from lacustrine to fluvial—or shallowing-upward succession; 2) the upper Wasatch to Uteland Butte records the upward transition from fluvial to lacustrine—or a deepening upward succession; 3) the Uteland Butte to Renegade Tongue records the upward transition from lacustrine to fluvial—a shallowing-upward succession; and 4) the Renegade Tongue to Mahogany oil shale interval records the upward transition from fluvial to lacustrine—a deepening upward succession. The two non-Waltherian progressions in the study area are: 1) the lower to middle Wasatch, which records the abrupt shift from low to high net-sand content fluvial system, and 2) the middle to upper Wasatch, which records the abrupt shift from high to intermediate net-sand content fluvial system.

Initial Teacher Education in the University "My Little Ship, How Ill-Laden You Are"

ERIC Educational Resources Information Center

Franchi, Leonardo

2016-01-01

Initial teacher education programmes in universities must meet the needs of varying constituencies. Politicians, school leaders and academics, for example, understandably seek to influence how these programmes should look. Given the importance of well-qualified teachers for the building of effective schools, it is right that a range of…

Profiles in Rural Economic Development: A Guidebook of Selected Successful Rural Area Initiatives.

ERIC Educational Resources Information Center

Thomas, Margaret G.

This guidebook presents 64 profiles of successful economic development initiatives in the small towns and rural areas of 37 states. Intended for use by rural and small town leaders and rural economic development specialists, the guide provides ideas, encouragement, and an "insider perspective" on alternative rural development strategies.…

Educating the Mind and the Spirit. Native American Higher Education Initiative. Profiles in Programming.

ERIC Educational Resources Information Center

Kellogg Foundation, Battle Creek, MI.

The Native American Higher Education Initiative (NAHEI), funded by the W. K. Kellogg Foundation, has departed from the assimilationist approach typical of past efforts to improve higher education for Native Americans. NAHEI supports Native American educational leaders' efforts to articulate their vision of higher education, strengthen their…

Why Digital Literacy Is Important for Science Teaching and Learning

ERIC Educational Resources Information Center

Ng, Wan

2011-01-01

In recent years, the Australian Government has invested heavily ($2.4 b) into the Digital Education Revolution with initiatives that aim at increasing ICT proficiencies in teachers and school leaders and equipping Years 9-12 students with a laptop each. Such initiatives should be welcomed by the science education community as ICT offers…

The National Higher Education and Workforce Initiative: Strategy in Action: Building the Cybersecurity Workforce in Maryland

ERIC Educational Resources Information Center

Business-Higher Education Forum, 2014

2014-01-01

The Business-Higher Education Forum (BHEF) has achieved particular success in operationalizing the National Higher Education and Workforce Initiative (HEWI) in Maryland around cybersecurity. Leveraging its membership of corporate CEOs, university presidents, and government agency leaders, BHEF partnered with the University System of Maryland to…

Sustainability of Foundation-Funded Grant Programs beyond Initial Funding: A Multicase Study at Selective Liberal Arts Colleges

ERIC Educational Resources Information Center

Lechuga, Deborah Chang

2010-01-01

College and university leaders must remain responsive to their environments by promoting institutional innovation and change. External grant-funders, such as foundations, view themselves as initiators of change. Foundations can provide the necessary tools to jump start innovation within colleges and universities. However, despite the best…

Action Learning: Developing Leaders and Supporting Change in a Healthcare Context

ERIC Educational Resources Information Center

Doyle, Louise

2014-01-01

This account of practice outlines how action learning was used as the key component of a leadership development initiative for managers in an acute hospital setting. It explains how the initiative was conceived, why action learning was chosen and how action learning principles were incorporated. Insights into the outcomes and considerations for…

The Motor System Contributes to Comprehension of Abstract Language

PubMed Central

Guan, Connie Qun; Meng, Wanjin; Yao, Ru; Glenberg, Arthur M.

2013-01-01

If language comprehension requires a sensorimotor simulation, how can abstract language be comprehended? We show that preparation to respond in an upward or downward direction affects comprehension of the abstract quantifiers “more and more” and “less and less” as indexed by an N400-like component. Conversely, the semantic content of the sentence affects the motor potential measured immediately before the upward or downward action is initiated. We propose that this bidirectional link between motor system and language arises because the motor system implements forward models that predict the sensory consequences of actions. Because the same movement (e.g., raising the arm) can have multiple forward models for different contexts, the models can make different predictions depending on whether the arm is raised, for example, to place an object or raised as a threat. Thus, different linguistic contexts invoke different forward models, and the predictions constitute different understandings of the language. PMID:24086463

An experimental study of the transient regime to fluidized chimney in a granular medium

NASA Astrophysics Data System (ADS)

Philippe, Pierre; Mena, Sarah; Brunier-Coulin, Florian; Curtis, Jennifer

2017-06-01

Localized fluidization within a granular packing along an almost cylindrical chimney is observed when an upward fluid-flow, injected through a small port diameter, exceeds a critical flow-rate. Once this threshold reached, a fluidized area is first initiated in the close vicinity of the injection hole before gradually growing upward to the top surface of the granular layer. In this work, we present an experimental investigation specifically dedicated to the kinetics of chimney fluidization in an immersed granular bed. Two different transient regimes are identified depending on wether the expansion of the fluidized area is rather fast and regular, reaching the final chimney state typically in less than 10 seconds, or, on the contrary, slow and very progressively accelerated, giving rise to transient duration up to 1 hour or even more. Some systematic investigations allow to propose several empirical scaling relations for the kinetics of chimney fluidization in the fast regular regime.

The effects of transformational and change leadership on employees' commitment to a change: a multilevel study.

PubMed

Herold, David M; Fedor, Donald B; Caldwell, Steven; Liu, Yi

2008-03-01

The effects of transformational leadership on the outcomes of specific change initiatives are not well understood. Conversely, organizational change studies have examined leader behaviors during specific change implementations yet have failed to link these to broader leadership theories. In this study, the authors investigate the relationship between transformational and change leadership and followers' commitment to a particular change initiative as a function of the personal impact of the changes. Transformational leadership was found to be more strongly related to followers' change commitment than change-specific leadership practices, especially when the change had significant personal impact. For leaders who were not viewed as transformational, good change-management practices were found to be associated with higher levels of change commitment. Copyright 2008 APA

A Comparison of Common and Novel Curriculum-Based Measurement of Reading Decision Rules to Predict Spring Performance for Students Receiving Supplemental Interventions

ERIC Educational Resources Information Center

Van Norman, Ethan R.; Parker, David C.

2018-01-01

Recent simulations suggest that trend line decision rules applied to curriculum-based measurement of reading progress monitoring data may lead to inaccurate interpretations unless data are collected for upward of 3 months. The authors of those studies did not manipulate goal line slope or account for a student's level of initial performance when…

The Development and Validation of a Concise Instrument for Formative Assessment of Team Leader Performance During Simulated Pediatric Resuscitations.

PubMed

Nadkarni, Lindsay D; Roskind, Cindy G; Auerbach, Marc A; Calhoun, Aaron W; Adler, Mark D; Kessler, David O

2018-04-01

The aim of this study was to assess the validity of a formative feedback instrument for leaders of simulated resuscitations. This is a prospective validation study with a fully crossed (person × scenario × rater) study design. The Concise Assessment of Leader Management (CALM) instrument was designed by pediatric emergency medicine and graduate medical education experts to be used off the shelf to evaluate and provide formative feedback to resuscitation leaders. Four experts reviewed 16 videos of in situ simulated pediatric resuscitations and scored resuscitation leader performance using the CALM instrument. The videos consisted of 4 pediatric emergency department resuscitation teams each performing in 4 pediatric resuscitation scenarios (cardiac arrest, respiratory arrest, seizure, and sepsis). We report on content and internal structure (reliability) validity of the CALM instrument. Content validity was supported by the instrument development process that involved professional experience, expert consensus, focused literature review, and pilot testing. Internal structure validity (reliability) was supported by the generalizability analysis. The main component that contributed to score variability was the person (33%), meaning that individual leaders performed differently. The rater component had almost zero (0%) contribution to variance, which implies that raters were in agreement and argues for high interrater reliability. These results provide initial evidence to support the validity of the CALM instrument as a reliable assessment instrument that can facilitate formative feedback to leaders of pediatric simulated resuscitations.

Initiating and utilizing shared leadership in teams: The role of leader humility, team proactive personality, and team performance capability.

PubMed

Chiu, Chia-Yen Chad; Owens, Bradley P; Tesluk, Paul E

2016-12-01

The present study was designed to produce novel theoretical insight regarding how leader humility and team member characteristics foster the conditions that promote shared leadership and when shared leadership relates to team effectiveness. Drawing on social information processing theory and adaptive leadership theory, we propose that leader humility facilitates shared leadership by promoting leadership-claiming and leadership-granting interactions among team members. We also apply dominance complementary theory to propose that team proactive personality strengthens the impact of leader humility on shared leadership. Finally, we predict that shared leadership will be most strongly related to team performance when team members have high levels of task-related competence. Using a sample composed of 62 Taiwanese professional work teams, we find support for our proposed hypothesized model. The theoretical and practical implications of these results for team leadership, humility, team composition, and shared leadership are discussed. (PsycINFO Database Record (c) 2016 APA, all rights reserved).

Advancing nursing leadership: a model for program implementation and measurement.

PubMed

Omoike, Osei; Stratton, Karen M; Brooks, Beth A; Ohlson, Susan; Storfjell, Judy Lloyd

2011-01-01

Despite the abundant literature documenting the need for nurse management education and career development, only recently have professional standards been targeted for this group. Competency standards for nurse leaders repeatedly identify systems-level concepts including finance and budget, communication skills, strategic management, human resources management, change management, and computer technology skills. However, educational initiatives to meet these standards are still at the early stages and most nurse leaders continue to acquire knowledge and experience through "on-the-job" training. This article will illustrate the need for partnerships and collaboration between academia and hospitals to advance nursing leadership to the next century. In addition, a tool to measure the impact of a graduate certificate program in nursing administration on nurse leader competencies is presented. Overall, the certificate program has been successful in multiple ways; it has "graduated" almost 80 nurse leaders, improved participant competence in their role at the systems level, as well as providing an impetus for completion of a graduate degree post program.

34 CFR 645.32 - How does the Secretary evaluate prior experience?

Code of Federal Regulations, 2011 CFR

2011-07-01

... Upward Bound and Upward Bound Math and Science Centers PE criteria in paragraph (e)(1)(ii) of this...) Regular Upward Bound and Upward Bound Math and Science Centers. (i) (3 points) Number of participants...

34 CFR 645.32 - How does the Secretary evaluate prior experience?

Code of Federal Regulations, 2013 CFR

2013-07-01

... Upward Bound and Upward Bound Math and Science Centers PE criteria in paragraph (e)(1)(ii) of this...) Regular Upward Bound and Upward Bound Math and Science Centers. (i) (3 points) Number of participants...

34 CFR 645.32 - How does the Secretary evaluate prior experience?

Code of Federal Regulations, 2014 CFR

2014-07-01

... Upward Bound and Upward Bound Math and Science Centers PE criteria in paragraph (e)(1)(ii) of this...) Regular Upward Bound and Upward Bound Math and Science Centers. (i) (3 points) Number of participants...

34 CFR 645.32 - How does the Secretary evaluate prior experience?

Code of Federal Regulations, 2012 CFR

2012-07-01

... Upward Bound and Upward Bound Math and Science Centers PE criteria in paragraph (e)(1)(ii) of this...) Regular Upward Bound and Upward Bound Math and Science Centers. (i) (3 points) Number of participants...

[Organization and expression of poliovirus genome].

PubMed

Vevcherenko, S G

1984-01-01

In the present paper on the basis of analysis of literary data it is postulated that along with the AUG codon at N743 there exists a second initiation codon in the poliovirus RNA (the AUG codon at N586). The translation initiated at N586 can be transferred to the phase of the major reading frame by removing the small hairpin N732-N744 formed near the first initiation site, or by removing the small region N739-N745. In the first case at the boundary between the hypothetical leader peptide encoded by the 5'-terminus of the long, open reading frame of the spliced poliovirus RNA and the capsid protein VP4 must be the Gln-Gly proteolytic cleavage signal, and in the second case--the Tyr-Gly signal. In both cases the leader peptide can be chipped off by the virus specific proteinase. It is supposed that the exon-intronic structure of the poliovirus genome is needed for coordination of translation and transcription during the poliovirus reproduction cycle.

Discrepancies in Leader and Follower Ratings of Transformational Leadership: Relationship with Organizational Culture in Mental Health.

PubMed

Aarons, Gregory A; Ehrhart, Mark G; Farahnak, Lauren R; Sklar, Marisa; Horowitz, Jonathan

2017-07-01

The role of leadership in the management and delivery of health and allied health services is often discussed but lacks empirical research. Discrepancies are often found between leaders' self-ratings and followers' ratings of the leader. To our knowledge no research has examined leader-follower discrepancies and their association with organizational culture in mental health clinics. The current study examines congruence, discrepancy, and directionality of discrepancy in relation to organizational culture in 38 mental health teams (N = 276). Supervisors and providers completed surveys including ratings of the supervisor transformational leadership and organizational culture. Polynomial regression and response surface analysis models were computed examining the associations of leadership discrepancy and defensive organizational culture and its subscales. Discrepancies between supervisor and provider reports of transformational leadership were associated with a more negative organizational culture. Culture suffered more where supervisors rated themselves more positively than providers, in contrast to supervisors rating themselves lower than the provider ratings of the supervisor. Leadership and leader discrepancy should be a consideration in improving organizational culture and for strategic initiatives such as quality of care and the implementation and sustainment of evidence-based practice.

New perspectives on counselling in audiological habilitation/rehabilitation.

PubMed

Borg, Erik; Borg, Birgitta

2015-01-01

To develop and apply a pedagogical method focusing on Empowerment, Empathy, Competence, and Counselling: the EC programme, and to present an initial evaluation. The EC programme was gradually developed within a study circle framework and in dialogue with study circle leaders and participants (clients) with hearing impairment (HI). An evaluation was carried out with the study circle leaders. Seventeen upper secondary school students with HI took part in the development of the programme. Eighteen study circle leaders responded to a questionnaire. The EC programme developed consisted of films, CD, and DVD productions to increase insight into one's own hearing ability, to demonstrate for others what HI means, strategies to evaluate situations, and help to act constructively in social situations. The study circle leaders found most of the course material appropriate and easy to use, as a whole or in parts. The leaders' evaluations indicated that the clients had increased their knowledge about how the HI affected themselves and others. The clients had improved their self-confidence and their empathic view of others. The EC programme can be used in its entirety or in part. Participation may lead to increased empowerment, empathy, competence and counselling ability.

34 CFR 645.20 - How many applications for an Upward Bound award may an eligible applicant submit?

Code of Federal Regulations, 2010 CFR

2010-07-01

... Upward Bound project, an Upward Bound Math and Science Center, or a Veterans Upward Bound project... additional application describes a project that serves a different participant population. (b) Each...

Initiatives to address vehicle compatibility

DOT National Transportation Integrated Search

2003-06-01

National Highway Traffic Safety Administration (NHTSA) is the national and international leader in collecting and analyzing motor vehicle crash data, and in developing countermeasures relevant to preventing and mitigating vehicle crashes, thereby red...

Sponsorship: a path to the academic medicine C-suite for women faculty?

PubMed

Travis, Elizabeth L; Doty, Leilani; Helitzer, Deborah L

2013-10-01

Despite increases in the percentages of women medical school graduates and faculty over the past decade, women physicians and scientists remain underrepresented in academic medicine's highest-level executive positions, known as the "C-suite." The challenges of today and the future require novel approaches and solutions that depend on having diverse leaders. Such diversity has been widely shown to be critical to creating initiatives and solving complex problems such as those facing academic medicine and science. However, neither formal mentoring programs focused on individual career development nor executive coaching programs focused on individual job performance have led to substantial increases in the proportion of women in academic medicine's top leadership positions.Faced with a similar dilemma, the corporate world has initiated sponsorship programs designed to accelerate the careers of women as leaders. Sponsors differ from mentors and coaches in one key area: They have the position and power to advocate publicly for the advancement of nascent talent, including women, in the organization. Although academic medicine differs from the corporate world, the strong sponsorship programs that have advanced women into corporations' upper levels of leadership can serve as models for sponsorship programs to launch new leaders in academic medicine.

Issues Facing Pharmacy Leaders in 2015: Suggestions for Pharmacy Strategic Planning

PubMed Central

Weber, Robert J.

2015-01-01

Issues facing pharmacy leaders in 2015 include practice model growth and the role of pharmacy students, clinical privileging of health-system pharmacists and provider status, medication error prevention, and specialty pharmacy services. The goal of this article is to provide practical approaches to 4 issues facing pharmacy leaders in 2015 to help them focus their department’s goals. This article will address (1) advances in the pharmacy practice model initiative and the role of pharmacy students, (2) the current thinking of pharmacists being granted clinical privileges in health systems, (3) updates on preventing harmful medication errors, and (4) the growth of specialty pharmacy services. The sample template of a strategic plan may be used by a pharmacy department in 2015 in an effort to continue developing patient-centered pharmacy services. PMID:25717212

The American Competitiveness Initiative: Addressing the STEM Teacher Shortage and Improving Student Academic Readiness. BHEF Issue Brief

ERIC Educational Resources Information Center

Business-Higher Education Forum (NJ1), 2006

2006-01-01

America's leaders are increasingly concerned about U.S. competitiveness in a rapidly globalizing world. In response, during the 2006 State of the Union Address, President Bush introduced the American Competitiveness Initiative (ACI) to promote policy that bolsters student achievement in the areas of science, technology, engineering, and…

Tech Prep Implementation in the United States: The Once and Future Role of Community Colleges.

ERIC Educational Resources Information Center

Bragg, Debra D.; Layton, James D.

1995-01-01

Describes a study examining the impact of the Tech Prep Education Act on the initial implementation of federally supported Tech Prep Initiatives. Based on telephone survey responses from all 50 state Tech Prep leaders, reviews findings concerning the funding of Tech Prep consortia, state and local administrative structures, policies and goals, and…

Transformations from within: Rethinking Pacific Education Initiative. The Development of a Movement for Social Justice and Equity

ERIC Educational Resources Information Center

Nabobo-Baba, Unaisi

2013-01-01

The paper reports on an initiative undertaken by a group of Pacific educators --"insiders" who have undertaken various activities and work of embedding Indigenous graduate attributes into teacher education courses, in leadership training of young and emerging young Pacific leaders and in communities, research that takes into account…

What We Have Learned about Class Size Reduction in California. Capstone Report.

ERIC Educational Resources Information Center

Bohrnstedt, George W., Ed.; Stecher, Brian M., Ed.

This final report on the California Class Size Reduction (CSR) initiative summarizes findings from three earlier reports dating back to 1997. Chapter 1 recaps the history of California's CSR initiative and includes a discussion of what state leaders' expectations were when CSR was passed. The chapter also describes research on class-size reduction…

The Common Core's Promises and Pitfalls from the Perspectives of Policy Entrepreneurs and Ground-Level Actors

ERIC Educational Resources Information Center

Kornhaber, Mindy L.; Barkauskas, Nikolaus J.; Griffith, Kelly M.; Sausner, Erica; Mahfouz, Julia

2017-01-01

The Common Core State Standards Initiative (Common Core) was spearheaded by policy entrepreneurs, unveiled nationally in 2010, and initially received strong support from leaders in state and federal government, philanthropic foundations, the business sector, and teacher unions. However, the reform came into the crosshairs of an ideologically wide…

Struggling to invent high-reliability organizations in health care settings: Insights from the field.

PubMed

Dixon, Nancy M; Shofer, Marjorie

2006-08-01

The Mission of the Agency for Healthcare Research and Quality (AHRQ) has been to support and conduct health services research and to disseminate those research findings. Recently the Agency has changed its mission to: "Improving the quality, safety, efficiency and effectiveness of health care for all Americans." For agency personnel working with the topic of patient safety, that change has created a need to develop greater awareness of the current patient safety initiatives underway at leading health care systems in order to determine where AHRQ might best play a role in helping these systems more rapidly adopt new practices to improve patient safety. In order to make that determination, AHRQ conducted a customer needs assessment of leaders in selected health care systems, asking them questions about their current implementation initiatives and their perceived needs for continued implementation of patient safety initiatives. Although not designed or conducted as a research study, the hour-long interviews produced rich insights into the implementation efforts of patient safety initiatives. The senior leaders interviewed in each of the health care systems, described implementing patient safety initiatives on multiple fronts-in some systems as many as 15 initiatives were underway. As the number of initiatives attests, there was no lack of knowledge about what patient safety practices should be implemented (CPOE, rapid response teams, reduction in surgical site infections) rather the major struggle these health care systems faced was the "how to" of implementation. Most initiatives were only newly begun, so these leaders were not yet confident about what they had learned from these efforts or whether they could be sustained over time. These health care systems drew many of the ideas for initiatives from outside of health care, for example, the nuclear power industry or aviation. The executives expressed concern about a number of issues including: how patient safety initiatives should be sequenced, the lack of benchmarking data to measure their systems against and the pressing need for IT standardization. The insights from this customer needs assessment revealed a wealth of implementation knowledge in the field and has led AHRQ to create an opportunity for leading edge health care systems to learn from each other via learning networks.

(Mis)perceptions of continuing education: insights from knowledge translation, quality improvement, and patient safety leaders.

PubMed

Kitto, Simon C; Bell, Mary; Goldman, Joanne; Peller, Jennifer; Silver, Ivan; Sargeant, Joan; Reeves, Scott

2013-01-01

Minimal attention has been given to the intersection and potential collaboration among the domains of continuing education (CE), knowledge translation (KT), quality improvement (QI), and patient safety (PS), despite their overlapping objectives. A study was undertaken to examine leaders' perspectives of these 4 domains and their relationships to each other. In this article, we report on a subset of the data that focuses on how leaders in KT, PS, and QI define and view the domain of CE and opportunities for collaboration. This study is based on a qualitative interpretivist framework to guide the collection and analysis of data in semistructured interviews. Criterion-based, maximum variation, and snowball sampling were used to identify key opinion leaders in each domain. The sample consisted of 15 individuals from the domains KT, QI, and PS. The transcripts were coded using a directed content analysis approach. The findings are organized into 3 thematic subsections: (1) definition and interpretation of CE, (2) concerns about relevance and effectiveness of CE, and (3) opportunities for collaboration among CE and the other domains. While there were slight differences among the data from the leaders of each domain, common themes were generally reported. The findings provide CE leaders with information about KT, QI, and PS leaders' (mis)perceptions about CE that can inform future strategic planning and activities. CE leaders can play an important role in building upon initial collaborations among the domains to enable their strengths to complement each other. Copyright © 2013 The Alliance for Continuing Education in the Health Professions, the Society for Academic Continuing Medical Education, and the Council on CME, Association for Hospital Medical Education.

Corona discharges from a windmill and its lightning protection tower in winter thunderstorms

NASA Astrophysics Data System (ADS)

Wu, Ting; Wang, Daohong; Rison, William; Thomas, Ronald J.; Edens, Harald E.; Takagi, Nobuyuki; Krehbiel, Paul R.

2017-05-01

This paper presents lightning mapping array (LMA) observations of corona discharges from a windmill and its lightning protection tower in winter thunderstorms in Japan. Corona discharges from the windmill, called windmill coronas, and those from the tower, called tower coronas, are distinctly different. Windmill coronas occur with periodic bursts, generally radiate larger power, and possibly develop to higher altitudes than tower coronas do. A strong negative electric field is necessary for the frequent production of tower coronas but is not apparently related with windmill coronas. These differences are due to the periodic rotation of the windmill and the moving blades which can escape space charges produced by corona discharges and sustain a large local electric field. The production period of windmill coronas is related with the rotation period of the windmill. Surprisingly, for one rotation of the windmill, only two out of the three blades produce detectable discharges and source powers of discharges from these two blades are different. The reason for this phenomenon is still unclear. For tower coronas, the source rate can get very high only when there is a strong negative electric field, and the source power can get very high only when the source rate is very low. The relationship between corona discharges and lightning flashes is investigated. There is no direct evidence that corona discharges can increase the chance of upward leader initiation, but nearby lightning flashes can increase the source rate of corona discharges right after the flashes. The peak of the source height distribution of corona discharges is about 100 m higher than the top of the windmill and the top of the tower. Possible reasons for this result are discussed.

Underlying mechanisms of transient luminous events: a review

NASA Astrophysics Data System (ADS)

Surkov, V. V.; Hayakawa, M.

2012-08-01

Transient luminous events (TLEs) occasionally observed above a strong thunderstorm system have been the subject of a great deal of research during recent years. The main goal of this review is to introduce readers to recent theories of electrodynamics processes associated with TLEs. We examine the simplest versions of these theories in order to make their physics as transparent as possible. The study is begun with the conventional mechanism for air breakdown at stratospheric and mesospheric altitudes. An electron impact ionization and dissociative attachment to neutrals are discussed. A streamer size and mobility of electrons as a function of altitude in the atmosphere are estimated on the basis of similarity law. An alternative mechanism of air breakdown, runaway electron mechanism, is discussed. In this section we focus on a runaway breakdown field, characteristic length to increase avalanche of runaway electrons and on the role played by fast seed electrons in generation of the runaway breakdown. An effect of thunderclouds charge distribution on initiation of blue jets and gigantic jets is examined. A model in which the blue jet is treated as upward-propagating positive leader with a streamer zone/corona on the top is discussed. Sprite models based on streamer-like mechanism of air breakdown in the presence of atmospheric conductivity are reviewed. To analyze conditions for sprite generation, thunderstorm electric field arising just after positive cloud-to-ground stroke is compared with the thresholds for propagation of positively/negatively charged streamers and with runway breakdown. Our own estimate of tendril's length at the bottom of sprite is obtained to demonstrate that the runaway breakdown can trigger the streamer formation. In conclusion we discuss physical mechanisms of VLF (very low frequency) and ELF (extremely low frequency) phenomena associated with sprites.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Saylors-Laster, Kim; Kirsch, Emily; Brown, Sandra

The Clean Energy Education & Empowerment initiative (C3E), provides a forum for thought leaders across the clean energy sector to devise innovative solutions to the nation's most pressing energy challenges. This year, the symposium was held at MIT's Media Lab in Cambridge, MA, on September 19-20, 2013. What sets the annual conference apart is its focus on building a strong community of professionals dedicated to advancing more women leaders in clean energy fields. By working to leverage the skills, talents and perspectives of women, the symposium helps to better position the U.S. to lead the global clean energy revolution.

76 FR 53531 - Rescinding the Notice of Intent for an Environmental Impact Statement (EIS): Hancock and Pearl...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-26

... Barnwell, Project Development Team Leader, Federal Highway Administration, Mississippi Division, 100 West...) in cooperation with the Mississippi Department of Transportation (MDOT) initiated an Environmental...

78 FR 20169 - Rescinding the Notice of Intent for an Environmental Impact Statement (EIS): Hancock County...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-03

... INFORMATION CONTACT: Claiborne Barnwell, Project Development Team Leader, Federal Highway Administration... Administration (FHWA) in cooperation with the Mississippi Department of Transportation (MDOT) initiated an...

Women's Heart Foundation

MedlinePlus

... News Email: Click for e-News archive The Women's Heart Foundation is a 501c3 dedicated to prevention, ... Care Initiative® to achieve excellence of care of women. Executive nurses, civic leaders, women survivors and sponsors ...

Leadership Skill Development of Teen Leaders.

ERIC Educational Resources Information Center

Kleon, Scott; Rinehart, Susan

1998-01-01

Teen participants in the Ohio 4-H Teen Community Leadership College (n=64) perceived their leadership skills to be much higher after the program. They appeared to need improvement in initiative, assertiveness, and objectivity. (SK)

From Caterpillars to Butterflies: Engaging Nurse Leaders in Evidence-Based Practice Reform.

PubMed

Sanares-Carreon, Dolora

2016-01-01

Evidence-based practice (EBP) occurs when the integration of best evidence is brought to the bedside to ground patient care decisions. Barriers to EBP have lingered for years and held unabated. The experiences of an academic medical center offer fresh perspectives in devolving the accountability for EBP where care is provided and received by patients. More specifically, the initiative is a focused engagement of nurse leaders in administrative positions for energizing bedside nurses to reform the enculturation of EBP. The goal is not to control but to explore approaches of handling the barriers with a complexity mindset amidst uncertainties. Nurses' collective engagement is envisioned to spark or refine creative ideas that will steer and account for EBP outcomes. The flight of the butterfly is used as a metaphor; hence, the title for the Monarch Moments Initiative.

Worklife Improvement and Leadership Development study: a learning experience in leadership development and "planned" organizational change.

PubMed

Cummings, Greta G; Spiers, Judith A; Sharlow, Janice; Germann, Paula; Yurtseven, Ozden; Bhatti, Aslam

2013-01-01

In response to increasing recognition of the importance of quality health care work environments, the Alberta Cancer Board initiated a province-wide leadership development program to plan for organizational change through a series of stages. In 2004, the Leadership Development Initiative (LDI) was implemented to facilitate organizational learning using a cohort-based leadership intervention based on a communities of practice framework. The aim of the Worklife Improvement and Leadership Development study was to examine both the outcomes and experiences of participants of the LDI program to better understand leadership development, implementation, and its impact on worklife quality among 5 cohorts of health care managers and staff at the Alberta Cancer Board. This study used both structured survey and interview methods, using a pretest-intervention-posttest quasi-experiment without a control group design, to assess the effects of LDI on worklife of leaders and staff. Surveys included the Leadership Practices Inventory and Areas of Worklife Scale, which looked at meaningfulness of work and organizational engagement. Interviews and focus group data provided a more detailed description of the experience of leadership development and perceptions of organizational worklife. The study revealed layers of information about the complexity of individual and collective leadership in a cohort-based design, perceptions of leadership initiatives, organizational worklife, and planned organizational change. Our findings suggest that early changes in how leaders reflected on their own skills and practices (Leading Self) were positive; however, growing disengagement as the LDI continued was evident in the focus group data, particularly when change in behavior of others was not perceived to be evident. To support the effectiveness and success of a leadership initiative, managers and administrators need to implement strategies designed to help leaders grow and cope with ongoing flux of organizational change and stagnation.

The response of physician groups to P4P incentives.

PubMed

Mehrotra, Ateev; Pearson, Steven D; Coltin, Kathryn L; Kleinman, Ken P; Singer, Janice A; Rabson, Barbra; Schneider, Eric C

2007-05-01

Despite substantial enthusiasm among insurers and federal policy makers for pay-for-performance incentives, little is known about the current scope of these incentives or their influence on the delivery of care. To assess the scope and magnitude of pay-for-performance (P4P) incentives among physician groups and to examine whether such incentives are associated with quality improvement initiatives. Structured telephone survey of leaders of physician groups delivering primary care in Massachusetts. ASSESSED METHODS: Prevalence of P4P incentives among physician groups tied to specific measures of quality or utilization and prevalence of physician group quality improvement initiatives. Most group leaders (89%) reported P4P incentives in at least 1 commercial health plan contract. Incentives were tied to performance on Health Employer Data and Information Set (HEDIS) quality measures (89% of all groups), utilization measures (66%), use of information technology (52%), and patient satisfaction (37%). Among the groups with P4P and knowledge of all revenue streams, the incentives accounted for 2.2% (range, 0.3%-8.8%) of revenue. P4P incentives tied to HEDIS quality measures were positively associated with groups' quality improvement initiatives (odds ratio, 1.6; P = .02). Thirty-six percent of group leaders with P4P incentives reported that they were very important or moderately important to the group's financial success. P4P incentives are now common among physician groups in Massachusetts, and these incentives most commonly reward higher clinical quality or lower utilization of care. Although the scope and magnitude of incentives are still modest for many groups, we found an association between P4P incentives and the use of quality improvement initiatives.

Experimental Study of the Richtmyer-Meshkov Instability of Incompressible Fluids

NASA Technical Reports Server (NTRS)

Niederhaus, Charles; Jacobs, Jeffrey W.

2002-01-01

The Richtmyer-Meshkov instability of a low Atwood number, miscible, two-liquid system is investigated experimentally. The initially stratified fluids are contained within a rectangular tank mounted to a sled that rides on a vertical set of rails. The instability is generated by dropping the sled onto a coil spring, producing a nearly impulsive upward acceleration. The subsequent freefall that occurs as the container travels upward and then downward on the rails allows the instability to evolve in the absence of gravity. The interface separating the two liquids initially has a well-defined, sinusoidal perturbation that quickly inverts and then grows in amplitude after undergoing the impulsive acceleration. Disturbance amplitudes are measured and compared to theoretical predictions. Linear stability theory gives excellent agreement with the measured initial growth rate, a(sub 0), for single-mode perturbations with the predicted amplitudes differing by less than 10% from experimental measurements up to a nondimensional time ka(sub 0)t = 0.7, where k is the wavenumber. Linear stability theory also provides excellent agreement for the individual mode amplitudes of multi-mode initial perturbations up until the interface becomes multi-valued. Comparison with previously published weakly nonlinear single-mode models shows good agreement up to ka(sub 0)t = 3, while published nonlinear single-mode models provide good agreement up to ka(sub 0)t = 30. The effects of Reynolds number on the vortex core evolution and overall growth rate of the interface are also investigated. Measurements of the overall amplitude are found to be unaffected by the Reynolds number for the range of values studied here. However, experiments carried out at lower values of Reynolds numbers were found to have decreased vortex core rotation rates. In addition, an instability in the vortex cores is observed.

Initial experiences and innovations in supervising community health workers for maternal, newborn, and child health in Morogoro region, Tanzania.

PubMed

Roberton, Timothy; Applegate, Jennifer; Lefevre, Amnesty E; Mosha, Idda; Cooper, Chelsea M; Silverman, Marissa; Feldhaus, Isabelle; Chebet, Joy J; Mpembeni, Rose; Semu, Helen; Killewo, Japhet; Winch, Peter; Baqui, Abdullah H; George, Asha S

2015-04-09

Supervision is meant to improve the performance and motivation of community health workers (CHWs). However, most evidence on supervision relates to facility health workers. The Integrated Maternal, Newborn, and Child Health (MNCH) Program in Morogoro region, Tanzania, implemented a CHW pilot with a cascade supervision model where facility health workers were trained in supportive supervision for volunteer CHWs, supported by regional and district staff, and with village leaders to further support CHWs. We examine the initial experiences of CHWs, their supervisors, and village leaders to understand the strengths and challenges of such a supervision model for CHWs. Quantitative and qualitative data were collected concurrently from CHWs, supervisors, and village leaders. A survey was administered to 228 (96%) of the CHWs in the Integrated MNCH Program and semi-structured interviews were conducted with 15 CHWs, 8 supervisors, and 15 village leaders purposefully sampled to represent different actor perspectives from health centre catchment villages in Morogoro region. Descriptive statistics analysed the frequency and content of CHW supervision, while thematic content analysis explored CHW, supervisor, and village leader experiences with CHW supervision. CHWs meet with their facility-based supervisors an average of 1.2 times per month. CHWs value supervision and appreciate the sense of legitimacy that arises when supervisors visit them in their village. Village leaders and district staff are engaged and committed to supporting CHWs. Despite these successes, facility-based supervisors visit CHWs in their village an average of only once every 2.8 months, CHWs and supervisors still see supervision primarily as an opportunity to check reports, and meetings with district staff are infrequent and not well scheduled. Supervision of CHWs could be strengthened by streamlining supervision protocols to focus less on report checking and more on problem solving and skills development. Facility health workers, while important for technical oversight, may not be the best mentors for certain tasks such as community relationship-building. We suggest further exploring CHW supervision innovations, such as an enhanced role for community actors, who may be more suitable to support CHWs engaged primarily in health promotion than scarce and over-worked facility health workers.

Establishing collaborative structures and relationships: Teacher leaders' experiences

NASA Astrophysics Data System (ADS)

Canizo, Thea Lynne

2002-04-01

The purpose of this study was to explore teacher leaders' experiences as they attempted to establish collaborative structures and relationships resulting in improved science instruction at their schools. Teacher leaders were middle school science facilitators, full-time classroom teachers who acted as liaisons between the science teachers at their schools and a change initiative funded by the National Science Foundation. This was a qualitative study, using interviews to create a case study. The researcher used a three-part interview design developed by Seidman (1991). Six research questions served as a framework for the data analysis. Participants identified the following as factors which contributed to their success: support from the principal, other science teachers, central staff personnel, and the district-wide group of science facilitators; professional development; and the successful completion of a scope and sequence for science instruction. Factors identified as hindering their success were: lack of support or conflict with the principal; resistance to change; time constraints; a district policy which limited meeting time; teacher and administrator turnover; tension between the middle school and junior high school models; and personal doubts. From descriptions of their understanding and exercising of leadership, the researcher concluded that teacher leaders had become empowered. The school culture was seen to have a great effect on teacher leaders. The contrasts between a school with a positive culture and another school in disarray were presented. Structures such as summer institutes and release time during the school day were identified as critical for giving teachers the time needed to establish more collaborative working relationships. Once greater trust and understanding were present, teachers were better able to examine their teaching practices more critically. Participants identified mentoring of new members, a continuing role for science facilitators, and central support as necessary for ensuring the sustainability of the changes made during the years of the grant initiative. The researcher concluded that teacher leaders can be a powerful force for bringing about change in schools when provided with training and time during the school day to work with colleagues.

Length bounds for connecting discharges in triggered lightning subsequent strokes

DOE Office of Scientific and Technical Information (OSTI.GOV)

Idone, V.P.

1990-11-20

Highly time resolved streak recordings from nine subsequent strokes in four triggered flashes have been examined for evidence of the occurrence of upward connecting discharges. These photographic recordings were obtained with superior spatial and temporal resolution (0.3 m and 0.5 {lambda}s) and were examined with a video image analysis system to help delineate the separate leader and return stroke image tracks. Unfortunately, a definitive determination of the occurrence of connecting discharges in these strokes could not be made. The data did allow various determinations of an upper bound length for any possible connecting discharge in each stroke. Under the simplestmore » analysis approach possible, an 'absolute' upper bound set of lengths was measured that ranged from 12 to 27 m with a mean of 19 m; two other more involved analyses yielded arguably better upper bound estimates of 8-18 m and 7-26 m with means of 19 m; two other more involved analyses yielded arguably better upper bound estimates of 8-18 m and 7-26 m with means of 12 and 13 m, respectively. An additional set of low time-resolution telephoto recordings of the lowest few meters of channel revealed six strokes in these flashes with one or more upward unconnected channels originating from the lightning rod tip. The maximum length of unconnected channel seen in each of these strokes ranged from 0.2 to 1.6 m with a mean of 0.7 m. This latter set of observations is interpreted as indirect evidence that connecting discharges did occur in these strokes and that the lower bound for their length is about 1 m.« less

Identification of potential opinion leaders in child health promotion in Sweden using network analysis.

PubMed

Guldbrandsson, Karin; Nordvik, Monica K; Bremberg, Sven

2012-08-08

Opinion leaders are often local individuals with high credibility who can influence other people. Robust effects using opinion leaders in diffusing innovations have been shown in several randomized controlled trials, for example regarding sexually transmitted infections (STI), human immunodeficiency virus (HIV) prevention, mammography rates and caesarean birth delivery rates. In a Cochrane review 2010 it was concluded that the use of opinion leaders can successfully promote evidence-based practice. Thus, using opinion leaders within the public health sector might be one means to speed up the dissemination of health promoting and disease preventing innovations. Social network analysis has been used to trace and map networks, with focus on relationships and positions, in widely spread arenas and topics. The purpose of this study was to use social network analysis in order to identify potential opinion leaders at the arena of child health promotion in Sweden. By using snowball technique a short e-mail question was spread in up to five links, starting from seven initially invited persons. This inquiry resulted in a network consisting of 153 individuals. The most often mentioned actors were researchers, public health officials and paediatricians, or a combination of these professions. Four single individuals were mentioned by five to seven other persons in the network. These individuals obviously possess qualities that make other professionals within the public health sector listen to and trust them. Social network analysis seemed to be a useful method to identify influential persons with high credibility, i.e. potential opinion leaders, at the arena of child health promotion in Sweden. If genuine opinion leaders could be identified directed measures can be carried out in order to spread new and relevant knowledge. This may facilitate for public health actors at the local, regional and national level to more rapidly progress innovations into everyday practice. However, effectiveness studies of opinion leaders in the public health sector still have to be performed.

Alternative routes to the leader male role in a multi-level society: follower vs. solitary male strategies and outcomes in hamadryas baboons.

PubMed

Pines, Mathew; Saunders, Julian; Swedell, Larissa

2011-07-01

The nested one-male units (OMUs) of the hamadryas baboon are part of a complex social system in which "leader" males achieve near exclusive mating access by forcibly herding females into permanent consortships. Within this multi-level social system (troops, bands, clans and OMUs) are two types of prereproductive males--the follower and solitary male--whose different trajectories converge on the leader role. Here we compare OMU formation strategies of followers, who associate with a particular OMU and may have social access to females, with those of solitary males, who move freely within the band and do not associate regularly with OMUs. Data were derived from 42 OMU formations (16 by followers and 26 by solitary males) occurring over 8 years in a hamadryas baboon band at the Filoha site in Ethiopia. "Initial units" (IUs) with sexually immature females (IU strategy) were formed by 44% of followers and 46% of solitary males. The remaining followers took over mature females when their leader was deposed (challenge strategy) or disappeared (opportunistic strategy), or via a seemingly peaceful transfer (inheritance strategy). Solitary males took over mature females from other clans and bands, but mainly from old, injured or vanished leaders within their clan (via both the challenge and opportunistic strategies). Former followers of an OMU were more successful at taking over females from those OMUs than any other category of male. Despite this advantage enjoyed by ex-follower leaders, ex-solitary leaders were equally capable of increasing their OMU size at a comparable rate in their first 2 years as a leader. These results demonstrate the potential for males to employ both multiple roles (follower vs. solitary male) and multiple routes (IU, inheritance, challenge, opportunistic) to acquire females and become a leader male in a mating system characterized by female defense polygyny in a competitive arena. © 2011 Wiley-Liss, Inc.

Automated analysis of lightning leader speed, local flash rates and electric charge structure in thunderstorms

NASA Astrophysics Data System (ADS)

Van Der Velde, O. A.; Montanya, J.; López, J. A.

2017-12-01

A Lightning Mapping Array (LMA) maps radio pulses emitted by lightning leaders, displaying lightning flash development in the cloud in three dimensions. Since the last 10 years about a dozen of these advanced systems have become operational in the United States and in Europe, often with the purpose of severe weather monitoring or lightning research. We introduce new methods for the analysis of complex three-dimensional lightning data produced by LMAs and illustrate them by cases of a mid-latitude severe weather producing thunderstorm and a tropical thunderstorm in Colombia. The method is based on the characteristics of bidrectional leader development as observed in LMA data (van der Velde and Montanyà, 2013, JGR-Atmospheres), where mapped positive leaders were found to propagate at characteristic speeds around 2 · 104 m s-1, while negative leaders typically propagate at speeds around 105 m s-1. Here, we determine leader speed for every 1.5 x 1.5 x 0.75 km grid box in 3 ms time steps, using two time intervals (e.g., 9 ms and 27 ms) and circles (4.5 km and 2.5 km wide) in which a robust Theil-Sen fitting of the slope is performed for fast and slow leaders. The two are then merged such that important speed characteristics are optimally maintained in negative and positive leaders, and labeled with positive or negative polarity according to the resulting velocity. The method also counts how often leaders from a lightning flash initiate or pass through each grid box. This "local flash rate" may be used in severe thunderstorm or NOx production studies and shall be more meaningful than LMA source density which is biased by the detection efficiency. Additionally, in each grid box the median x, y and z components of the leader propagation vectors of all flashes result in a 3D vector grid which can be compared to vectors in numerical models of leader propagation in response to cloud charge structure. Finally, the charge region altitudes, thickness and rates are summarized from vertical profiles of positive and negative leader rates where these exceed their 7-point averaged profiles. The summarized data can be used to follow charge structure evolution over time, and will be useful for climatological studies and statistical comparison against the parameters of the meteorological environment of storms.

Funding big research with small money.

PubMed

Hickey, Joanne V; Koithan, Mary; Unruh, Lynn; Lundmark, Vicki

2014-06-01

This department highlights change management strategies that maybe successful in strategically planning and executing organizational change initiatives.With the goal of presenting practical approaches helpful to nurse leaders advancing organizational change, content includes evidence-based projects, tools,and resources that mobilize and sustain organizational change initiatives.In this article, the guest authors introduce crowd sourcing asa strategy for funding big research with small money.

Mr. Smith Goes to Washington: A Resource for Examining Ethical Leadership in Decision-Making.

ERIC Educational Resources Information Center

Pruitt, Randall P.

One of the challenges of a communication instructor is how to initiate the discussion of ethics in the university classroom. The classic film, "Mr. Smith Goes to Washington," has proved a useful tool for initiating discussion of ethical decision-making in leadership. This film presents a young and idealistic leader of boy ranger clubs…

Brainstorming for breakthrough thinking.

PubMed

Shirey, Maria R

2011-12-01

This department highlights change management strategies that may be used in strategically planning and executing organizational change initiatives. With the goal of presenting practical approaches helpful to nurse leaders advancing organizational change, content includes evidence-based projects, tools, and resources that mobilize and sustain organizational change initiatives. In this article, the author discusses brainstorming as a viable innovation technique and goal-based change intervention.

A Case Study of the Relationship between School Leadership and Mathematics and Reading Performance of Grade 8 Students

ERIC Educational Resources Information Center

Omotoso, Christianah B.

2012-01-01

The No Child Left Behind federal mandate to improve student achievement in reading and math resulted in several initiatives related to educational leadership. However, these initiatives have yet to improve student achievement. Therefore, the research question focused on how school leaders used Senge's five disciplines of a learning…

Building Leadership Capacity in California's Public Education Systems: Lessons from the SCALE Initiative

ERIC Educational Resources Information Center

Knudson, Joel

2014-01-01

This report documents the history and evolution of the Stuart Foundation California Leaders in Education (SCALE) Initiative through 2014. It tells the story of how the work began, what it entails, and how it has developed across time. The report also identifies lessons learned from the SCALE experience. These lessons can inform the participants of…

Toward Determining Best Practices for Recruiting Future Leaders in Food Science and Technology

ERIC Educational Resources Information Center

Stevenson, Clinton D.

2016-01-01

There is a shortage of qualified food scientists in the workforce that has adverse consequences for the quality and safety of our food supply. The Institute of Food Technologists and other institutions have initiated and continue to initiate outreach programs; however, an analysis of the effectiveness of these efforts has not yet come to fruition.…

Cultivating strategic thinking skills.

PubMed

Shirey, Maria R

2012-06-01

This department highlights change management strategies that may be successful in strategically planning and executing organizational change initiatives. With the goal of presenting practical approaches helpful to nurse leaders advancing organizational change, content includes evidence-based projects, tools, and resources that mobilize and sustain organizational change initiatives. In this article, the author presents an overview of strategic leadership and offers approaches for cultivating strategic thinking skills.

Sustaining 21st Century Community Learning Centers: What Works for Programs and How Policymakers Can Help. Strategy Brief

ERIC Educational Resources Information Center

Szekely, Amanda; Padgette, Heather Clapp

2006-01-01

This tool is part of a series of technical assistance resources on financing and sustaining out-of-school time and community school initiative. These tools and resources are intended to assist policymakers, program developers and community leaders in developing financing and sustainability strategies to support effective initiatives. For nearly a…

Policies and Practices. Shortening Children's Stays in Temporary Care, Part One. Family to Family: Tools for Rebuilding Foster Care.

ERIC Educational Resources Information Center

Annie E. Casey Foundation, Baltimore, MD.

The Family to Family initiative has encouraged states to reconceptualize, redesign, and reconstruct their foster care systems. By 1996, the initiative was being implemented in five states and six counties in two additional states. Drawing on the experiences of Family to Family participants, a framework for child welfare leaders working to reduce…

Forgotten but not gone: an examination of fit between leader consideration and initiating structure needed and received.

PubMed

Lambert, Lisa Schurer; Tepper, Bennett J; Carr, Jon C; Holt, Daniel T; Barelka, Alex J

2012-09-01

We examined the effects of fit between leader consideration and initiating structure needed and received on employees' work-related attitudes (i.e., trust in the supervisor, job satisfaction, and affective commitment to the organization). Consistent with predictions that derive from the person-environment fit research tradition, results from Study 1 suggested that deficient amounts of both leadership behaviors were associated with unfavorable attitudinal outcomes. However, while excess levels of consideration were associated with favorable attitudinal outcomes, excess levels of initiating structure were associated with unfavorable attitudes, and for both forms of leadership, higher levels of absolute fit were associated with more favorable outcomes. Results from Study 2 suggested that attitudes generated by the fit between leadership needed and received influence employees' organizational citizenship behavior as reported by their supervisors. The relationship between consideration needed and received and subordinates' organizational citizenship behavior relating to individuals (OCBI) and organizational citizenship behavior relating to the organization itself (OCBO) was partially mediated by employees' trust in the supervisor, while the relationship between initiating structure needed and received and OCBI was fully mediated by trust in the supervisor, and for OCBO was partially mediated.

Intermittent Reconnection Downflow Enhancements In A Simulated Flux Rope Eruption

NASA Astrophysics Data System (ADS)

Kliem, Bernhard; Linton, M. G.

2009-05-01

Supra-arcade downflows in X-ray and EUV flare emissions and post-eruption inflows in coronagraph data have been interpreted to be signatures of the downward reconnection outflow from a vertical (flare) current sheet. These downflows show an intermittent occurrence pattern, indicating that the reconnection is bursty in time or patchy in space, or both. We present MHD simulations of such reconnection in the realistic configuration of a vertical current sheet formed beneath and driven by an erupting flux rope. The reconnection is found to develop bursty outflows, both upward and downward, with the upward outflows generally showing the stronger variablity. While the reconnection starts early in the rise of the flux rope and its peak upward outflow velocity is closely correlated with the rope's rise velocity, the burstiness develops in a clear fashion only as the rope's height has increased from the initial position by about an order of magnitude, so that the current sheet has reached a sufficient vertical extent. The reconnection downflow shows a series of enhancements, each of them starting at a successively greater height from a newly developed magnetic X line. The plasma temporarily accelerated downward in such an enhancement soon turns into a gradual deceleration and then eventually comes to rest on top of previously accelerated plasma. These findings are consistent with the observations of intermittent downflows.

"Diversity is at the core of who we are".

PubMed

Tisdel, Yvonne

2007-01-01

In an effort to become a more fully diverse organization, St. Louis-based SSM Health Care (SSMHC) implemented a plan called "Strategic Goals for Diversity for 1998 to 2004." The plan called for Increasing diversity among SSMHC employees. Improving support to, and alliances with, organizations that pursue fairness and equality for all people. Establishing a work environment that rewards and recognizes excellence and attracts and retains the best people, regardless of factors like race, religion, disability, and gender. Increasing business partnerships with minority and women suppliers. Having established strategic goals, SSM launched a Diversity Forum: a corporate-sponsored gathering designed to develop the careers of people of color, of different ethnic backgrounds, or with disabilities. Diversity Forum participants suggested that mentoring minority employees would help SSM reach its goals. In 2000, the system launched its Diversity Mentoring Program, designed to last four years. The program had two main purposes: To increase the number of people of color, of different ethnicity, or with disabilities in the system's professional and managerial ranks. To prepare these minority professionals and managers for upward mobility by pairing them with executive leaders. Along with the focus on SSM's employees, the system looked outside as well, to its relationships with local communities. The organization worked toward expanding its commitment to purchase from local, small, and minority-owned businesses. In 2005, to help SSM entities meet new goals for 2005-2010 (with a new emphasis on minority patients and customers), the system introduced a new measurement tool, the Diversity Scorecard, which is a comprehensive measuring tool that allows SSM leaders to benchmark their efforts.

Modeling the Electric Potential and Surface Charge Density Near Charged Thunderclouds

NASA Astrophysics Data System (ADS)

Neel, Matthew Stephen

2018-03-01

Thundercloud charge separation, or the process by which the bottom portion of a cloud gathers charge and the top portion of the cloud gathers the opposite charge, is still not thoroughly understood. Whatever the mechanism, though, a charge separation definitely exists and can lead to electrostatic discharge via cloud-to-cloud lightning and cloud-to-ground lightning. We wish to examine the latter form, in which upward leaders from Earth connect with downward leaders from the cloud to form a plasma channel and produce lightning. Much of the literature indicates that the lower part of a thundercloud becomes negatively charged while the upper part becomes positively charged via convective charging, although the opposite polarity can certainly exist along with various, complex intra-cloud currents. It is estimated that >90% of cloud-to-ground lightning is "negative lightning," or the flow of charges from the bottom of the cloud, while the remaining <10% of lightning strikes is "positive lightning," or the flow of charges from the top of the cloud. We wish to understand the electric potential surrounding charged thunderclouds as well as the resulting charge density on the surface of Earth below them. In this paper we construct a simple and adaptable model that captures the very basic features of the cloud/ground system and that exhibits conditions favorable for both forms of lightning. In this way, we provide a practical application of electrostatic dipole physics as well as the method of images that can serve as a starting point for further modeling and analysis by students.

Frontline engagement. Leap of faith.

PubMed

Taylor, Jennifer

2006-04-06

Making jobs interesting is a good motivator for nursing staff. The initiative requires effective leaders at all levels in the health and social system. Lack of time is often a major barrierto engaging people in productive time work.

An Introduction to Air Quality Modeling

EPA Science Inventory

Empowering Sustainability is an initiative at the University of California, Irvine, dedicated to connecting sustainability leaders (fellows) across generations, countries, and disciplines through the exchange of ideas and experiences related to all aspects of sustainability, and ...

Business Case for Early Childhood Investments

ERIC Educational Resources Information Center

America's Promise Alliance (NJ1), 2011

2011-01-01

America's Promise's ReadyNation initiative has released this brief, which "makes the case" to business leaders on why investing in early childhood should be important to them. The brief includes "how-to" tips, helpful statistics and more.

SepticSmart Homeowners

EPA Pesticide Factsheets

EPA’s SepticSmart initiative is a nation-wide public education effort with resources for homeowners with septic systems, local organizations and government leaders to learn how septic systems work and simple, everyday tips on how to properly maintain them.

Experience of initiating collaboration of traditional healers in managing HIV and AIDS in Tanzania

PubMed Central

Kayombo, Edmund J; Uiso, Febronia C; Mbwambo, Zakaria H; Mahunnah, Rogasian L; Moshi, Mainen J; Mgonda, Yasin H

2007-01-01

Collaboration between traditional healers and biomedical practitioners is now being accepted by many African countries south of the Sahara because of the increasing problem of HIV/AIDS. The key problem, however, is how to initiate collaboration between two health systems which differ in theory of disease causation and management. This paper presents findings on experience learned by initiation of collaboration between traditional healers and the Institute of Traditional Medicine in Arusha and Dar-es-Salaam Municipalities, Tanzania where 132 and 60 traditional healers respectively were interviewed. Of these 110 traditional healers claimed to be treating HIV/AIDS. The objective of the study was to initiate sustainable collaboration with traditional healers in managing HIV/AIDS. Consultative meetings with leaders of traditional healers' associations and government officials were held, followed by surveys at respective traditional healers' "vilinge" (traditional clinics). The findings were analysed using both qualitative and quantitative methods. The findings showed that influential people and leaders of traditional healers' association appeared to be gatekeepers to access potential good healers in the two study areas. After consultative meetings these leaders showed to be willing to collaborate; and opened doors to other traditional healers, who too were willing to collaborate with the Institute of Traditional Medicine in managing HIV/AIDS patients. Seventy five percent of traditional healers who claimed to be treating HIV/AIDS knew some HIV/AIDS symptoms; and some traditional healers attempted to manage these symptoms. Even though, they were willing to collaborate with the Institute of Traditional Medicine there were nevertheless some reservations based on questions surrounding sharing from collaboration. The reality of past experiences of mistreatment of traditional healers in the colonial period informed these reservations. General findings suggest that initiating collaboration is not as easy as it appears to be from the literature, if it is to be meaningful; and thus we are calling for appropriate strategies to access potential healers targeted for any study designed with sustainability in mind. PMID:17257409

Communication: essential strategies for success.

PubMed

O'Connor, Mary

2013-06-01

This department highlights change management strategies that may be successful in strategically planning and executing organizational change initiatives. With the goal of presenting practical approaches helpful to nurse leaders advance organizational change, content includes evidence-based projects, tool, and resources that mobilize and sustain organizational change initiatives. In this article, the author discusses strategies for communication for change processes, whether large or small. Intentional planning and development of a communication strategy alongside, not as an afterthought, to change initiatives are essential.

Leadership and adolescent girls: a qualitative study of leadership development.

PubMed

Hoyt, Michael A; Kennedy, Cara L

2008-12-01

This research investigated youth leadership experiences of adolescent girls who participated in a comprehensive feminist-based leadership program. This qualitative study utilized a grounded theory approach to understand changes that occurred in 10 female adolescent participants. The words of the participants revealed that initially they viewed leadership in traditional terms and were hesitant to identify themselves as leaders or to see themselves included within their concepts of leadership. Following the program their view of leadership expanded and diversified in a manner that allowed for inclusion of themselves within it. They spoke with greater strength and confidence and felt better positioned and inspired to act as leaders. Participants identified having examples of women leaders, adopting multiple concepts of leadership, and participating in an environment of mutual respect and trust as factors that contributed to their expanded conceptualization.

The Interferometric View of Lightning

NASA Astrophysics Data System (ADS)

Stock, M.; Lapierre, J. L.

2017-12-01

Recent advances in off the shelf high-speed digitizers has enabled vast improvements in broadband, digital VHF interferometers. These simple instruments consist of 3 or more VHF antennas distributed in an array which are then digitized at a speed above the Nyquist frequency of the antenna bandwidth (usually 200+ MHz). Broadband interferometers are capable of creating very detailed maps of lightning, with time resolution better than 1us, and angular resolution only limited by their baseline lengths. This is combined with high sensitivity, and the ability to locate both continuously emitting and impulsive radiation sources. They are not without their limitations though. Because the baselines are relatively short, the maps are only 2-dimensional (direction to the source), unless many antennas are used only a single VHF radiation source can be located at any instant, and because the antennas are almost always arranged in a planar array they are better suited for observing lightning at high elevation angles. Even though imperfect, VHF interferometers provide one of the most detailed views of the behavior of lightning flashes inside a cloud. This presentation will present the overall picture of in-cloud lightning as seen by VHF interferometers. Most flashes can be split into 3 general phases of activity. Phase 1 is the initiation phase, covering all activity until the negative leader completes its vertical extension, and includes both lightning initiation and initial breakdown pulses. Phase 2 is the active phase and includes all activity during the horizontal extension of the negative leader. During Phase 2, any K-processes which occur tend to be short in duration and extent. Phase 3 is the final phase, and includes all activity after the negative leader stops propagating. During Phase 3, the conductivity of the lightning channels starts to decline, and extensive K-processes are seen which traverse the entire channel structure, this is also the period in which regular pulse trains tend to be observed. Not all flashes fit this fairly simplistic structure, in particular some flashes seem to lack a vertically developing negative leader, and others seem to lack activity after the negative leader stops propagating. Still, this basic anatomy of an in-cloud flash proves useful in describing the overall structure of a lightning flash.

Youth advocacy as a tool for environmental and policy changes that support physical activity and nutrition: an evaluation study in San Diego County.

PubMed

Linton, Leslie S; Edwards, Christine C; Woodruff, Susan I; Millstein, Rachel A; Moder, Cheryl

2014-03-27

As evidence grows about the benefits of policy and environmental changes to support active living and healthy eating, effective tools for implementing change must be developed. Youth advocacy, a successful strategy in the field of tobacco control, should be evaluated for its potential in the field of obesity prevention. San Diego State University collaborated with the San Diego County Childhood Obesity Initiative to evaluate Youth Engagement and Action for Health! (YEAH!), a youth advocacy project to engage youth and adult mentors in advocating for neighborhood improvements in physical activity and healthy eating opportunities. Study objectives included documenting group process and success of groups in engaging in community advocacy with decision makers. In 2011 and 2012, YEAH! group leaders were recruited from the San Diego County Childhood Obesity Initiative's half-day train-the-trainer seminars for adult leaders. Evaluators collected baseline and postproject survey data from youth participants and adult group leaders and interviewed decision makers. Of the 21 groups formed, 20 completed the evaluation, conducted community assessments, and advocated with decision makers. Various types of decision makers were engaged, including school principals, food service personnel, city council members, and parks and recreation officials. Eleven groups reported change(s) implemented as a result of their advocacy, 4 groups reported changes pending, and 5 groups reported no change as a result of their efforts. Even a brief training session, paired with a practical manual, technical assistance, and commitment of adult leaders and youth may successfully engage decision makers and, ultimately, bring about change.

78 FR 54459 - Agency Information Collection Activities; Submission to the Office of Management and Budget for...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-04

... Upward Bound Math Science Annual Performance Report AGENCY: Office of Postsecondary Education (OPE... Upward Bound Math Science Annual Performance Report. OMB Control Number: 1840-NEW. Type of Review: New... Upward Bound (UB) and Upward Bound Math and Science (UBMS) Programs. The Department is requesting a new...

Privacy Impact Assessment for the TRIO Programs Annual Performance Report (APR) System

ERIC Educational Resources Information Center

US Department of Education, 2008

2008-01-01

The TRIO Programs Annual Performance Report (APR) System collects individual student records on individuals served by the following Federal TRIO Programs: Upward Bound (which includes regular Upward Bound (UB), Upward Bound Math-Science (UBMS), and Veterans Upward Bound (VUB)); Student Support Services (SSS); and the Ronald E. McNair Post…

How Upward Moral Comparison Influences Prosocial Behavioral Intention: Examining the Mediating Role of Guilt and the Moderating Role of Moral Identity.

PubMed

Zhang, Heyun; Chen, Sisi; Wang, Rong; Jiang, Jiang; Xu, Yan; Zhao, Huanhuan

2017-01-01

Although it has been shown that exceptional good deeds exert influences on people's prosocial behavior and intention, we have known little about how common moral actions in our daily life. The present study aimed to examine how upward moral comparison influenced prosocial behavioral intention as well as to explore the mediating role of guilt and the moderating role of moral identity in the focal relationship. An experimental study was conducted with 162 Chinese undergraduates (103 women, 59 men) randomly assigned to an upward moral comparison condition, an upward competence comparison condition or a control condition. Results indicated that participants in the upward moral comparison condition experienced higher levels of guilt and exhibited stronger motivation to act prosocially, relative to participants in the other two conditions. That is to say, upward moral comparison induces guilty experience, and then increases people's prosocial behavioral intention. Moreover, we have found that moral identity internalization moderates the upward moral comparison-guilt relationship, and the indirect effect of upward moral comparison on prosocial behavioral intention via guilt. The implications of these findings were discussed.

Improving healthcare systems' disclosures of large-scale adverse events: a Department of Veterans Affairs leadership, policymaker, research and stakeholder partnership.

PubMed

Elwy, A Rani; Bokhour, Barbara G; Maguire, Elizabeth M; Wagner, Todd H; Asch, Steven M; Gifford, Allen L; Gallagher, Thomas H; Durfee, Janet M; Martinello, Richard A; Schiffner, Susan; Jesse, Robert L

2014-12-01

The Department of Veterans Affairs (VA) mandates disclosure of large-scale adverse events to patients, even if risk of harm is not clearly present. Concerns about past disclosures warranted further examination of the impact of this policy. Through a collaborative partnership between VA leaders, policymakers, researchers and stakeholders, the objective was to empirically identify critical aspects of disclosure processes as a first step towards improving future disclosures. Semi-structured interviews were conducted with participants at nine VA facilities where recent disclosures took place. Ninety-seven stakeholders participated in the interviews: 38 employees, 28 leaders (from facilities, regions and national offices), 27 Veteran patients and family members, and four congressional staff members. Facility and regional leaders were interviewed by telephone, followed by a two-day site visit where employees, patients and family members were interviewed face-to-face. National leaders and congressional staff also completed telephone interviews. Interviews were analyzed using rapid qualitative assessment processes. Themes were mapped to the stages of the Crisis and Emergency Risk Communication model: pre-crisis, initial event, maintenance, resolution and evaluation. Many areas for improvement during disclosure were identified, such as preparing facilities better (pre-crisis), creating rapid communications, modifying disclosure language, addressing perceptions of harm, reducing complexity, and seeking assistance from others (initial event), managing communication with other stakeholders (maintenance), minimizing effects on staff and improving trust (resolution), and addressing facilities' needs (evaluation). Through the partnership, five recommendations to improve disclosures during each stage of communication have been widely disseminated throughout the VA using non-academic strategies. Some improvements have been made; other recommendations will be addressed through implementation of a large-scale adverse event disclosure toolkit. These toolkit strategies will enable leaders to provide timely and transparent information to patients and families, while reducing the burden on employees and the healthcare system during these events.

Modeling of a new electron-streamer acceleration mechanism

NASA Astrophysics Data System (ADS)

Ihaddadene, K. M. A.; Dwyer, J. R.; Liu, N.; Celestin, S. J.

2017-12-01

Lightning stepped leaders and laboratory spark discharges in air are known to produce X-rays [e.g., Dwyer et al., Geophys. Res. lett., 32, L20809, 2005; Kochkin et al., J. Phys. D: Appl. Phys., 45, 425202, 2012]. However, the processes behind the production of these X-rays are still not very well understood. During discharges, encounters between streamers of different polarities are very common. For example, during the formation of a new leader step, the negative streamer zone around the tip of a negative leader and the positive streamers initiated from the posiive part of a bidirectional space leader strongly interact. In laboratory experiments, when streamers are approaching a sharp electrode, streamers with the opposite polarity are initiated from the electrode and collide with the former streamers. Recently, the encounter between negative and positive streamers has been proposed as a plausible mechanism for the production of X-rays by spark discharges [Cooray et la., JASTP, 71, 1890, 2009; Kochkin et al., J. Phys. D: Appl. Phys., 45, 425202, 2012], but modeling results have shown later that the increase of the electric field involved in this process, which is above the conventional breakdown threshold field, is accompanied by a strong increase of the electron density. The resulting increase in the conductivity, in turn, causes this electric field to collapse over a few tens of picoseconds, preventing the electrons reaching high energies and producing significant X-ray emissions [e.g., Ihaddadene and Celestin, Geophys. Res. Lett., 45, 5644, 2015]. In this work, we will present simulation results of a new electron acceleration mechanism for producing runaway electron energies above hundred keV. The mechanism couples multiple single streamers and streamer head-on collisions, similar to a laboratory discharge, and is suitable for explaining the high-energy X-rays produced by discharges in air and by lightning stepped leaders.

Nursing unit leaders' influence on the long-term sustainability of evidence-based practice improvements.

PubMed

Fleiszer, Andrea R; Semenic, Sonia E; Ritchie, Judith A; Richer, Marie-Claire; Denis, Jean-Louis

2016-04-01

To describe how actions of nursing unit leaders influenced the long-term sustainability of a best practice guidelines (BPG) program on inpatient units. Several factors influence the initial implementation of evidence-based practice improvements in nursing, with leadership recognized as essential. However, there is limited knowledge about enduring change, including how frontline nursing leaders influence the sustainability of practice improvements over the long term. A qualitative descriptive case study included 39 in-depth interviews, observations, and document reviews. Four embedded nursing unit subcases had differing levels of program sustainability at 7 years (average) following implementation. Higher levels of BPG sustainability occurred on units where formal leadership teams used an integrated set of strategies and activities. Two key strategies were maintaining priorities and reinforcing expectations. The coordinated use of six activities (e.g., discussing, evaluating, integrating) promoted the continuation of BPG practices among staff. These leadership processes, fostering exchange and learning, contributed to sustainability-promoting environments characterized by teamwork and accountability. Unit leaders are required to strategically orchestrate several overlapping and synergistic efforts to achieve long-term sustainability of BPG-based practice improvements. As part of managing overall unit performance, unit leaders may influence practice improvement sustainability by aligning vision, strategies, and activities. © 2015 John Wiley & Sons Ltd.

The effect of professional partnership on the development of a mutual-help organization.

PubMed

Salem, Deborah A; Reischl, Thomas M; Randall, Katie W

2008-09-01

The effects of partnership between Schizophrenics Anonymous (SA, a mutual-help organization) and the Mental Health Association in Michigan (MHAM, a professionally staffed advocacy organization) on SA's growth and development were explored. Following the initiation of a formal partnership, SA groups were more available throughout the state, more likely to be associated with formal mental health settings, and less likely to have leaders who had been participants in other SA groups. Groups with consumer leaders had significantly greater longevity than groups with professional leaders. Changes in the organizational structure and process of SA were also identified. SA leaders reported that SA moved from a collective to a more bureaucratic structure. As a result, there was greater consistency, administrative capacity, and response capacity. This enhanced capacity came with costs reported by SA leaders. The leadership role of SA members became less defined. SA members expressed concerns about the more hierarchical structure of SA's organization, decreased consumer control, increased professional involvement in SA, and an excessive focus on group development as opposed to group maintenance. Mental Health Association in Michigan staff reported that MHAM was also impacted by the partnership, both with regard to internal functioning and external perception. Implications for effective partnerships between mutual-help and professional organizations are discussed.

Does decentralisation enhance a school's role of promoting social cohesion? Bosnian school leaders' perceptions of school governance

NASA Astrophysics Data System (ADS)

Komatsu, Taro

2014-05-01

This study seeks to understand whether and how decentralised school governance in Bosnia and Herzegovina (BiH) enhances the schools' role of promoting social cohesion. This includes increasing "horizontal" trust among different ethnic groups and "vertical" trust between civilians and public institutes. The study examined secondary school leaders' perceptions regarding school board influence on social cohesion policies and practices, their interactions with school board members, and their accountability to the school-based governing body. The results show that school leaders and school boards, supposedly representing the interests of local stakeholders, did not appear to be actively engaged in the deliberate process of promoting social cohesion. While school directors tended to view themselves as being independent from the school boards, ethnically diverse school boards provided important support to proactive school leaders for their inter-group activities. Given that the central level is not providing initiatives to promote social cohesion and that BiH citizens appear to generally support social cohesion, decentralised school governance has the potential to improve social trust from the bottom up. To promote participatory school governance, the study recommends that BiH school leaders should be provided with opportunities to re-examine and redefine their professional accountability and to assist local stakeholders to improve their involvement in school governance.

Creating unstable velocity-space distributions with barium injections

NASA Technical Reports Server (NTRS)

Pongratz, M. B.

1983-01-01

Ion velocity-space distributions resulting from barium injections from orbiting spacecraft and shaped charges are discussed. Active experiments confirm that anomalous ionization processes may operate, but photoionization accounts for the production of the bulk of the barium ions. Pitch-angle diffusion and/or velocity-space diffusion may occur, but observations of barium ions moving upwards against gravity suggests that the ions retain a significant enough fraction of their initial perpendicular velocity to provide a mirror force. The barium ion plasmas should have a range of Alfven Mach numbers and plasma betas. Because the initial conditions can be predicted these active experiments should permit testing plasma instability hypotheses.

The Wisconsin Early Childhood Obesity Prevention Initiative: An Example of Statewide Collective Impact.

PubMed

Meinen, Amy; Hilgendorf, Amy; Korth, Amy L; Christens, Brian D; Breuer, Catherine; Joyner, Hilary; Polzin, Molle; Adams, Alexandra; Wolfe, Daithi; Braun, Abbe; Hoiting, Jill; Paulson, Jeanette; Cullen, Bridget; Stader, Kelli

2016-11-01

The Wisconsin Early Childhood Obesity Prevention Initiative (Initiative), established in 2007, seeks to address and prevent obesity in the early care and education system through nutrition and physical activity environmental and policy changes. The collaborative includes professionals from 3 state of Wisconsin Departments, the University of Wisconsin-Extension, the University of Wisconsin-Madison, and public health and early care and education organizations. This paper explores the efforts of the Initiative to advance our understanding of collective impact in practice and its value to health promotion efforts. Evaluators conducted a mixed methods case study to evaluate the application of collective impact principles by the Initiative. This included a survey of Initiative partners, review of archival documents, and qualitative interviews with Initiative leaders. Initiative partners noted progress in establishing the conditions for collective impact. Archival documents and interviews describe both formal and informal practices that helped set a common agenda, align and coordinate partner activities, and promote communication among Initiative leaders. Results also detail the important current and potential roles of “backbone” staff from healthTIDE to support the Initiative. Additionally, results suggest particularly challenging aspects of the Initiative’s impact model related to shared measurement and broader stakeholder communication. While the Initiative is still setting in place the conditions for collective impact, it has achieved significant policy, systems, and environment changes since its formation. Inclusion of nutrition and physical activity criteria in the state’s quality rating improvement system for child care centers is one of its outcomes. This case study offers several important insights about the application of collective impact in health promotion efforts, particularly in relation to the transition from previous collaborative activities, the value of establishing a clear common agenda among partners, the roles of backbone staff, and time and partner relationships in collective impact.

Leadership behaviors for successful university--community collaborations to change curricula.

PubMed

Bland, C J; Starnaman, S; Hembroff, L; Perlstadt, H; Henry, R; Richards, R

1999-11-01

What constitutes effective leadership in a collaborative effort to achieve enduring curricular and student career changes? This question was investigated as part of a larger evaluation of the W. K. Kellogg Foundation's Community Partnership Health Professions Education, a five-year initiative involving projects at seven sites. The goal was to produce more primary care health providers by making enduring curricular change. Data were collected from participants with respect to predictors of project success and leaders' use of 16 behaviors via telephone interviews, mailed surveys, and focus groups. Focus groups also gathered project leaders' views of skills and knowledge necessary for effective leadership. Leadership strategies associated with positive outcomes were: consistent leader; use of multiple cognitive frames, especially a human resource frame; use of a broad range of leadership behaviors, particularly participative governance and cultural influence; and a majority of community representatives on the partnership board. The primary leader, compared with a leadership team, is most influential in achieving positive outcomes. Effective leaders use a broad array of behaviors, but particularly emphasize the use of participative governance and culture/value-influencing behaviors. In addition, the more frequent use of these behaviors compared with the use of organizational power behaviors is important. It is helpful to perceive the project from a human-relations frame and at least one other frame. Using a leadership team can be helpful, especially in building coalitions, but the importance of the primary leader's behaviors to project outcomes is striking.

Evaluation of leadership skills during the simulation education course for the initial management of blunt trauma.

PubMed

Schott, Eric; Brautigam, Robert T; Smola, Jacqueline; Burns, Karyl J

2012-04-01

Leadership skills of senior residents, trauma fellows, and a nurse practitioner were assessed during simulation training for the initial management of blunt trauma. This was a pilot, observational study, that in addition to skill development and assessment also sought to determine the need for a dedicated leadership training course for surgical residents. The study evaluated the leadership skills and adherence to Advance Trauma Life Support (ATLS) guidelines of the team leaders during simulation training. The team leaders' performances on criteria regarding prearrival planning, critical actions based on ATLS, injury identification, patient management, and communication were evaluated for each of five blunt-trauma scenarios. Although there was a statistically significant increase in leadership skills for performing ATLS critical actions, P < 0.05, there were 10 adverse events. A structured simulation program dedicated to developing skills for team leadership willbe a worthwhile endeavor at our institution.

Robust Huber-based iterated divided difference filtering with application to cooperative localization of autonomous underwater vehicles.

PubMed

Gao, Wei; Liu, Yalong; Xu, Bo

2014-12-19

A new algorithm called Huber-based iterated divided difference filtering (HIDDF) is derived and applied to cooperative localization of autonomous underwater vehicles (AUVs) supported by a single surface leader. The position states are estimated using acoustic range measurements relative to the leader, in which some disadvantages such as weak observability, large initial error and contaminated measurements with outliers are inherent. By integrating both merits of iterated divided difference filtering (IDDF) and Huber's M-estimation methodology, the new filtering method could not only achieve more accurate estimation and faster convergence contrast to standard divided difference filtering (DDF) in conditions of weak observability and large initial error, but also exhibit robustness with respect to outlier measurements, for which the standard IDDF would exhibit severe degradation in estimation accuracy. The correctness as well as validity of the algorithm is demonstrated through experiment results.

The landscape for women leaders in dental education, research, and practice.

PubMed

Whelton, Helen; Wardman, Margaret J

2015-05-01

Following early limitations on women becoming educated in and practicing dentistry, the proportion of women enrolled in dental schools around the world has increased dramatically over the past decades. Dental schools have undergone a transformation from male dominance to almost equal numbers in the United States and female predominance in other countries including the United Kingdom. However, this change in student gender distribution has not been matched among academic leaders. Data from across the globe indicate a clear disproportion in favor of males in leadership positions in dentistry-and the more senior the position, the greater the imbalance. This article reviews the evolving changes in gender distribution across the landscape of dental education, research, and practice and some initiatives to address the gender imbalance in leadership. Such initiatives can help to ensure that, in the future, the profession benefits from the spectrum of influences brought to bear by the leadership of both women and men.

Promoted Metals Combustion at Ambient and Elevated Temperatures

NASA Technical Reports Server (NTRS)

Engel, Carl D.; Herald, Stephen D.; Davis, S. Eddie

2005-01-01

Promoted combustion testing of materials, Test 17 of NASA STD-6001, has been used to assess metal propensity to burn in oxygen rich environments. An igniter is used at the bottom end of a rod to promote ignition, and if combustion is sustained, the burning progresses from the bottom to the top of the rod. The physical mechanisms are very similar to the upward flammability test, Test 1 of NASA STD-6001. The differences are in the normal environmental range of pressures, oxygen content, and sample geometry. Upward flammability testing of organic materials can exhibit a significant transitional region between no burning to complete quasi-state burning. In this transitional region, the burn process exhibits a probabilistic nature. This transitional region has been identified for metals using the promoted combustion testing method at ambient initial temperatures. The work given here is focused on examining the transitional region and the quasi-steady burning region both at conventional ambient testing conditions and at elevated temperatures. A new heated promoted combustion facility and equipment at Marshall Space Flight Center have just been completed to provide the basic data regarding the metals operating temperature limits in contact with oxygen rich atmospheres at high pressures. Initial data have been obtained for Stainless Steel 304L, Stainless Steel 321, Haynes 214, and Inconel 718 at elevated temperatures in 100-percent oxygen atmospheres. These data along with an extended data set at ambient initial temperature test conditions are examined. The pressure boundaries of acceptable, non-burning usage is found to be lowered at elevated temperature.

Viewpoint: A challenge to academic health centers and the National Institutes of Health to prevent unintended gender bias in the selection of clinical and translational science award leaders.

PubMed

Carnes, Molly; Bland, Carole

2007-02-01

In controlled studies, both men and women preferentially select men over women for leadership positions, even when credentials are identical and despite field studies demonstrating women's equivalent or slightly better leadership effectiveness. The assumption that men will make better leaders than women is attributed to the pervasive existence of unconscious stereotypes that characterize both men and leaders as agentic or action oriented and women as dependent. The Clinical and Translational Science Award (CTSA) from the National Institutes of Health (NIH) Roadmap is a novel, prestigious award that will place considerable power in the hands of one principal investigator-conditions that predict activation of bias in favor of selecting male leaders. The authors review research supporting this assertion. To mitigate the impact of this bias and broaden the pool of potential leaders for this transformative initiative, the authors offer the following suggestions. To academic health centers they suggest (1) internal search committees comprised of at least 35% women that establish a priori the desired qualities for the CTSA leader and broadly solicit applicants, (2) explicit specification of the full range of desirable skills of a CTSA leader, and (3) systematic efforts to increase awareness of the negative impact of unconscious gender bias on women's advancement. To the NIH they suggest (1) the new multiple principal investigator rule for the CTSA program, (2) a statement in the request for applications (RFA) encouraging diversity among principal investigators, (3) repetition in the RFA of the public NIH statement of the importance of work life balance for young investigators, and (4) constitution of study sections with at least 35% women.

Technology Self-Efficacy Beliefs of Ninth-Grade Students after One Year of One-to-One Initiative Implementation

ERIC Educational Resources Information Center

McGee, Adrianne Nicole

2015-01-01

This dissertation was designed to gather data regarding the self-efficacy beliefs of ninth graders after experiencing the one-to-one technology initiative for 1 school year. The goal was to obtain information based on the experiences of the students in order to enlighten leaders of other schools and districts when implementing their own technology…

Managing Reform Efforts in Times of Uncertainty: Effects of Principal Support and Leadership on Teachers' Implementation Commitment to Common Core Reform Initiatives

ERIC Educational Resources Information Center

Smith, Lee W.

2016-01-01

The Common Core State Standards (CCSS) require a major shift in instructional practices among teachers. Such changes cause much uncertainty as teachers' roles and identities begin to change. Major school reform creates difficulty for school leaders who must develop teacher support and dedication to 'top-down' reform initiatives in their…

Establishing a sense of urgency for leading transformational change.

PubMed

Shirey, Maria R

2011-04-01

This department highlights change management strategies that may be successful in strategically planning and executing organizational change initiatives. With the goal of presenting practical approaches helpful to nurse leaders advancing organizational change, content includes evidence-based projects, tools, and resources that mobilize and sustain organizational change initiatives. In this article, the author discusses successful tactics for establishing a sense of urgency to facilitate organizational change.

Carnegie Corporation's Youth Intergroup Relations Initiative. Report of a Meeting Convened by Carnegie Corporation of New York (New York, NY, October 15-17, 1997).

ERIC Educational Resources Information Center

Brawarsky, Sandee

The Carnegie Corporation's initiative, established in 1996 to create a "new generation of tolerance," included grants to 16 institutions for cutting-edge research in various social science disciplines. Some themes are presented from the second meeting of project leaders for these research efforts. Most of the themes relate to the roles…

Addressing strategy execution challenges to lead sustainable change.

PubMed

Shirey, Maria R

2011-01-01

This department highlights change management strategies that may be successful in strategically planning and executing organizational change initiatives. With the goal of presenting practical approaches helpful to nurse leaders advancing organizational change, content includes evidence-based projects, tools, and resources that mobilize and sustain organizational change initiatives. In this article, the author discusses strategy execution challenges that must be addressed to lead sustainable change.

Study of Preschool Parents and Caregivers Use of Technology and PBS KIDS Transmedia Resources: A Report to the CPB-PBS "Ready to Learn Initiative"

ERIC Educational Resources Information Center

Pasnik, Shelley; Llorente, Carlin

2012-01-01

Leaders of the CPB-PBS "Ready To Learn" Initiative understand the important role parents and caregivers play in ensuring young children's healthy development and academic learning. In order for young children, especially those living in traditionally underserved communities, to succeed at school and thrive outside of the classroom, educational…

Leaning in: lessons for leadership career development.

PubMed

Shirey, Maria R

2013-11-01

This department highlights change management strategies that may be successful in strategically planning and executing organizational change initiatives. With the goal of presenting practical approaches helpful to nurse leaders advancing organizational change, content includes evidence-based projects, tools, and resources that mobilize and sustain organizational change initiatives. In this article, the author introduces the book Lean In and presents applicable lessons for nursing leadership career development.

Method and apparatus for flash evaporation of liquids

DOEpatents

Bharathan, Desikan

1984-01-01

A vertical tube flash evaporator for introducing a superheated liquid into a flash evaporation chamber includes a vertical inlet tube with a flared diffuser portion at its upper outlet end. A plurality of annular screens are positioned in axially spaced-apart relation to each other around the periphery of the vertical tube and below the diffuser portion thereof. The screens are preferably curved upward in a cup-shaped configuration. These flash evaporators are shown in an ocean thermal energy conversion unit designed for generating electric power from differential temperature gradients in ocean water. The method of use of the flash evaporators of this invention includes flowing liquid upwardly through the vertical tube into the diffuser where initial expansion and boiling occurs quite violently and explosively. Unvaporized liquid sheets and drops collide with each other to enhance surface renewal and evaporation properties, and liquid flowing over the outlet end of the diffuser falls onto the curved screens for further surface renewal and evaporation.

Method and apparatus for flash evaporation of liquids

DOEpatents

Bharathan, D.

1984-01-01

A vertical tube flash evaporator for introducing a super-heated liquid into a flash evaporation chamber includes a vertical inlet tube with a flared diffuser portion at its upper outlet end. A plurality of annular screens are positioned in axially spaced-apart relation to each other around the periphery of the vertical tube and below the diffuser portion thereof. The screens are preferably curved upward in a cup-shaped configuration. These flash evaporators are shown in an ocean thermal energy conversion unit designed for generating electric power from differential temperature gradients in ocean water. The method of use of the flash evaporators of this invention includes flowing liquid upwardly through the vertical tube into the diffuser where initial expansion and boiling occurs quite violently and explosively. Unvaporized liquid sheets and drops collide with each other to enhance surface renewal and evaporation properties, and liquid flowing over the outlet end of the diffuser falls onto the curved screens for further surface renewal and evaporation.

The C3E Women in Clean Energy Symposium

ScienceCinema

Saylors-Laster, Kim; Kirsch, Emily; Brown, Sandra; Jordan, Rhonda; Mukherjee, Anuradha; Martin, Cheryl; Madden, Alice; Araujo, Kathy

2018-02-13

The Clean Energy Education & Empowerment initiative (C3E), provides a forum for thought leaders across the clean energy sector to devise innovative solutions to the nation's most pressing energy challenges. This year, the symposium was held at MIT's Media Lab in Cambridge, MA, on September 19-20, 2013. What sets the annual conference apart is its focus on building a strong community of professionals dedicated to advancing more women leaders in clean energy fields. By working to leverage the skills, talents and perspectives of women, the symposium helps to better position the U.S. to lead the global clean energy revolution.

Effect of CRM team leader training on team performance and leadership behavior in simulated cardiac arrest scenarios: a prospective, randomized, controlled study.

PubMed

Fernandez Castelao, Ezequiel; Boos, Margarete; Ringer, Christiane; Eich, Christoph; Russo, Sebastian G

2015-07-24

Effective team leadership in cardiopulmonary resuscitation (CPR) is well recognized as a crucial factor influencing performance. Generally, leadership training focuses on task requirements for leading as well as non-leading team members. We provided crisis resource management (CRM) training only for designated team leaders of advanced life support (ALS) trained teams. This study assessed the impact of the CRM team leader training on CPR performance and team leader verbalization. Forty-five teams of four members each were randomly assigned to one of two study groups: CRM team leader training (CRM-TL) and additional ALS-training (ALS add-on). After an initial lecture and three ALS skill training tutorials (basic life support, airway management and rhythm recognition/defibrillation) of 90-min each, one member of each team was randomly assigned to act as the team leader in the upcoming CPR simulation. Team leaders of the CRM-TL groups attended a 90-min CRM-TL training. All other participants received an additional 90-min ALS skill training. A simulated CPR scenario was videotaped and analyzed regarding no-flow time (NFT) percentage, adherence to the European Resuscitation Council 2010 ALS algorithm (ADH), and type and rate of team leader verbalizations (TLV). CRM-TL teams showed shorter, albeit statistically insignificant, NFT rates compared to ALS-Add teams (mean difference 1.34 (95% CI -2.5, 5.2), p = 0.48). ADH scores in the CRM-TL group were significantly higher (difference -6.4 (95% CI -10.3, -2.4), p = 0.002). Significantly higher TLV proportions were found for the CRM-TL group: direct orders (difference -1.82 (95% CI -2.4, -1.2), p < 0.001); undirected orders (difference -1.82 (95% CI -2.8, -0.9), p < 0.001); planning (difference -0.27 (95% CI -0.5, -0.05) p = 0.018) and task assignments (difference -0.09 (95% CI -0.2, -0.01), p = 0.023). Training only the designated team leaders in CRM improves performance of the entire team, in particular guideline adherence and team leader behavior. Emphasis on training of team leader behavior appears to be beneficial in resuscitation and emergency medical course performance.

How Upward Moral Comparison Influences Prosocial Behavioral Intention: Examining the Mediating Role of Guilt and the Moderating Role of Moral Identity

PubMed Central

Zhang, Heyun; Chen, Sisi; Wang, Rong; Jiang, Jiang; Xu, Yan; Zhao, Huanhuan

2017-01-01

Although it has been shown that exceptional good deeds exert influences on people's prosocial behavior and intention, we have known little about how common moral actions in our daily life. The present study aimed to examine how upward moral comparison influenced prosocial behavioral intention as well as to explore the mediating role of guilt and the moderating role of moral identity in the focal relationship. An experimental study was conducted with 162 Chinese undergraduates (103 women, 59 men) randomly assigned to an upward moral comparison condition, an upward competence comparison condition or a control condition. Results indicated that participants in the upward moral comparison condition experienced higher levels of guilt and exhibited stronger motivation to act prosocially, relative to participants in the other two conditions. That is to say, upward moral comparison induces guilty experience, and then increases people's prosocial behavioral intention. Moreover, we have found that moral identity internalization moderates the upward moral comparison-guilt relationship, and the indirect effect of upward moral comparison on prosocial behavioral intention via guilt. The implications of these findings were discussed. PMID:28959221

Increasing Product Confidence-Shifting Paradigms.

PubMed

Phillips, Marla; Kashyap, Vishal; Cheung, Mee-Shew

2015-01-01

Leaders in the pharmaceutical, medical device, and food industries expressed a unilateral concern over product confidence throughout the total product lifecycle, an unsettling fact for these leaders to manage given that their products affect the lives of millions of people each year. Fueled by the heparin incident of intentional adulteration in 2008, initial efforts for increasing product confidence were focused on improving the confidence of incoming materials, with a belief that supplier performance must be the root cause. As in the heparin case, concern over supplier performance extended deep into the supply chain to include suppliers of the suppliers-which is often a blind spot for pharmaceutical, device, and food manufacturers. Resolved to address the perceived lack of supplier performance, these U.S. Food and Drug Administration (FDA)-regulated industries began to adopt the supplier relationship management strategy, developed by the automotive industry, that emphasizes "management" of suppliers for the betterment of the manufacturers. Current product and supplier management strategies, however, have not led to a significant improvement in product confidence. As a result of the enduring concern by industry leaders over the lack of product confidence, Xavier University launched the Integrity of Supply Initiative in 2012 with a team of industry leaders and FDA officials. Through a methodical research approach, data generated by the pharmaceutical, medical device, and food manufacturers surprisingly pointed to themselves as a source of the lack of product confidence, and revealed that manufacturers either unknowingly increase the potential for error or can control/prevent many aspects of product confidence failure. It is only through this paradigm shift that manufacturers can work collaboratively with their suppliers as equal partners, instead of viewing their suppliers as "lesser" entities needing to be controlled. The basis of this shift provides manufacturers with a newfound respect for their suppliers, and it will allow manufacturers to finally address true root causes that can lead to a marked increase in product confidence. In the past decade, pharmaceutical, medical device, and food manufacturers have increased their focus on controlling and managing the performance of their suppliers in an effort to improve the confidence of the materials going into the final marketed products and to improve patient and customer confidence in final product reliability and safety. Concerned that product confidence has not improved, Xavier University launched the Integrity of Supply Initiative in 2012 with a team of industry leaders and U.S. Food and Drug Administration officials. Through this initiative, data generated has revealed that manufacturers either unknowingly increase the potential for error or can control/prevent many aspects of product confidence failure. Product confidence can be improved by shifting the focus from controlling supplier practices to controlling the practices of the manufacturers themselves. © PDA, Inc. 2015.

Self-handicapping, excuse making, and counterfactual thinking: consequences for self-esteem and future motivation.

PubMed

McCrea, Sean M

2008-08-01

Researchers interested in counterfactual thinking have often found that upward counterfactual thoughts lead to increased motivation to improve in the future, although at the cost of increased negative affect. The present studies suggest that because upward counterfactual thoughts indicate reasons for a poor performance, they can also serve as excuses. In this case, upward counterfactual thoughts should result in more positive self-esteem and reduced future motivation. Five studies demonstrated these effects in the context of self-handicapping. First, upward counterfactual thinking was increased in the presence of a self-handicap. Second, upward counterfactual thoughts indicating the presence of a self-handicap protected self-esteem following failure. Finally, upward counterfactual thoughts that protect self-esteem reduced preparation for a subsequent performance as well as performance itself. These findings suggest that the consequences of upward counterfactuals for affect and motivation are moderated by the goals of the individual as well as the content of the thoughts. (c) 2008 APA, all rights reserved

Sustaining Reliability on Accountability Measures at The Johns Hopkins Hospital.

PubMed

Pronovost, Peter J; Holzmueller, Christine G; Callender, Tiffany; Demski, Renee; Winner, Laura; Day, Richard; Austin, J Matthew; Berenholtz, Sean M; Miller, Marlene R

2016-02-01

In 2012 Johns Hopkins Medicine leaders challenged their health system to reliably deliver best practice care linked to nationally vetted core measures and achieve The Joint Commission Top Performer on Key Quality Measures ®program recognition and the Delmarva Foundation award. Thus, the Armstrong Institute for Patient Safety and Quality implemented an initiative to ensure that ≥96% of patients received care linked to measures. Nine low-performing process measures were targeted for improvement-eight Joint Commission accountability measures and one Delmarva Foundation core measure. In the initial evaluation at The Johns Hopkins Hospital, all accountability measures for the Top Performer program reached the required ≥95% performance, gaining them recognition by The Joint Commission in 2013. Efforts were made to sustain performance of accountability measures at The Johns Hopkins Hospital. Improvements were sustained through 2014 using the following conceptual framework: declare and communicate goals, create an enabling infrastructure, engage clinicians and connect them in peer learning communities, report transparently, and create accountability systems. One part of the accountability system was for teams to create a sustainability plan, which they presented to senior leaders. To support sustained improvements, Armstrong Institute leaders added a project management office for all externally reported quality measures and concurrent reviewers to audit performance on care processes for certain measure sets. The Johns Hopkins Hospital sustained performance on all accountability measures, and now more than 96% of patients receive recommended care consistent with nationally vetted quality measures. The initiative methods enabled the transition of quality improvement from an isolated project to a way of leading an organization.

Leading an intervention for family caregivers-a part of nursing in palliative care.

PubMed

Holm, Maja; Goliath, Ida; Södlind, Hanna; Alvariza, Anette

2017-04-02

Professional leadership has been highlighted as an important part of successful intervention delivery. The aim of this study is to explore the narratives of nurses involved in leading a group intervention for family caregivers in palliative care. Nurses were interviewed about their experiences as group leaders in a psycho-educational group intervention, which was delivered at 10 specialised palliative home care settings, with the help of an intervention manual. Data were analysed with interpretive descriptive methodology. Three themes were identified in the analysis: embracing the leading role, developing qualities as a group leader, and professional and personal development. The results showed that the role as group leader initially was a challenge for the nurses, but that they gradually were able to develop the professional and personal skills that were required. The nurses believed that their profession was best suited to lead this kind of supportive intervention.

Psychometric properties of the Transitions from Foster Care Key Leader Survey.

PubMed

Salazar, Amy M; Brown, Eric C; Monahan, Kathryn C; Catalano, Richard F

2016-04-01

This study summarizes the development and piloting of the Transitions from Foster Care Key Leader Survey (TFC-KLS), an instrument designed to measure change in systems serving young people transitioning from foster care to adulthood. The Jim Casey Youth Opportunity Initiative's logic model was used as a basis for instrument development. The instrument was piloted with 119 key leaders in six communities. Seven of eight latent scales performed well in psychometric testing. The relationships among the 24 measures of system change were explored. A CFA testing overall model fit was satisfactory following slight modifications. Finally, a test of inter-rater reliability between two raters did not find reliable reporting of service availability in a supplemental portion of the survey. The findings were generally positive and supported the validity and utility of the instrument for measuring system change, following some adaptations. Implications for the field are discussed. Copyright © 2015 Elsevier Ltd. All rights reserved.

Leadership by collaboration: Nursing's bold new vision for academic-practice partnerships.

PubMed

Sebastian, Juliann G; Breslin, Eileen T; Trautman, Deborah E; Cary, Ann H; Rosseter, Robert J; Vlahov, David

In 2016 the American Association of Colleges of Nursing issued a report, Advancing Healthcare Transformation: A New Era for Academic Nursing that included recommendations for more fully integrating nursing education, research, and practice. The report calls for a paradigm shift in how nursing leaders in academia and practice work together and with other leaders in higher education and clinical practice. Only by doing so can we realize the full benefits of academic nursing in this new era in which integration and collaboration are essential to success. In this paper we: 1) examine how academic nursing can contribute to healthcare innovation across environments; 2) explore leadership skills for deans of nursing to advance the goals of academic nursing in collaboration with clinical nursing partners, other health professions and clinical service leaders, academic administrators, and community members; and, 3) consider how governance structures and policy initiatives can advance this work. Copyright © 2017 Elsevier Inc. All rights reserved.

A hybrid model for opinion formation

NASA Astrophysics Data System (ADS)

Borra, Domenica; Lorenzi, Tommaso

2013-06-01

This paper presents a hybrid model for opinion formation in a large group of agents exposed to the persuasive action of a small number of strong opinion leaders. The model is defined by coupling a finite difference equation for the dynamics of leaders opinion with a continuous integro-differential equation for the dynamics of the others. Such a definition stems from the idea that the leaders are few and tend to retain original opinions, so that their dynamics occur on a longer time scale with respect to the one of the other agents. A general well-posedness result is established for the initial value problem linked to the model. The asymptotic behavior in time of the related solution is characterized for some general parameter settings, which mimic distinct social scenarios, where different emerging behaviors can be observed. Analytical results are illustrated and extended through numerical simulations.

Developing leadership in nurse managers: the British Columbia Nursing Leadership Institute.

PubMed

MacPhee, Maura; Bouthillette, France

2008-01-01

The British Columbia Nursing Administrative Leadership Institute for First Line Nurse Leaders (BC NLI) is a collaborative partnership among British Columbia's Chief Nursing Officers, the Ministry of Health Nursing Directorate and the University of British Columbia School of Nursing. This initiative consists of a four-day residential program and a year-long leadership project between BC NLI participants and their organizational mentors. The evidence-based curriculum covers universal leadership and management concepts, but it also addresses leadership issues of relevance to nurse leaders in today's complex healthcare environments. The BC NLI is part of a provincial health human resources endeavour to ensure sufficient nursing leaders - for now and in the future. This paper will discuss the development, implementation and evaluation of the BC NLI. Unique aspects of the program, such as its online networking component, will be described, and its role in nursing leadership research will be briefly examined.